JP3337641B2 - Bar feeder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bar feeder for feeding a bar to a bar processing apparatus such as an NC automatic lathe, and more particularly, to a guide rail body for guiding a bar. The present invention relates to a so-called oil-type bar feeder whose inside is filled with oil.

[0002]

2. Description of the Related Art There is known a bar feeder configured to automatically feed a long bar to a bar processing apparatus such as an NC automatic lathe for cutting a tip portion of a bar. ing.
The bar feeder has a gutter-shaped guide rail body that opens straight upward and extends straight toward the bar processing device for feeding the bar to be processed to the bar processing device. The rear end of the bar is gripped by a finger chuck provided at the tip of a feed arrow, and the front end of the bar is gripped by a collet chuck of a bar processing apparatus. While the bar is rotating at high speed, the feed arrow moves forward and backward in the guide rail along the bar feed axis which coincides with the center axis of the bar processing device or the center axis of the collet chuck. It is fed to the device.

[0003] When the bar is particularly thin, an intermediate point between the rear end gripped on the feed axis by the finger chuck at the tip of the feed arrow and the front end gripped by the collet chuck of the bar processing apparatus. The portion may bend under its own weight, or the middle portion may be bent due to the original shape of the bar. If the bar is rotated at high speed in this state, the bar is hit against the inner wall surface of the guide rail to generate vibration and noise, and when the bar vibrates, the bar cannot be machined precisely. Conventionally, a so-called oil-type bar feeder has been known as a bar feeder devised so as to reduce vibration and noise during such bar processing. For example, a conventional oil-type bar feeder has a feed passage which is a complete liquid-tight closed space, fills the inside thereof with oil, and fills a bent or bent middle portion of the bar. When the rod rotates, the oil is hydrodynamically centriped to float toward the feed axis, thereby preventing contact between the rod and the guide rail.

[0004]

However, the oil-type bar feeder having a completely liquid-tight feed passage as described above has a precisely formed guide rail body and a lid member which are sealingly engaged with each other. In addition, a complicated opening and closing mechanism for the lid member is required, which causes an increase in manufacturing cost. Also, when the bending or bending of the bar is large or the rotation speed of the bar is low, the bent or bent portion of the bar is raised to the feed axis depending on the hydrodynamic centripetal action of the oil. And vibration and noise cannot be reduced sufficiently.
Therefore, an object of the present invention is to provide an oil-type bar feeder having a simple structure, which can more effectively prevent vibration and noise of the bar and can process the bar more precisely. To provide.

[0005]

SUMMARY OF THE INVENTION The object of the present invention is to provide a plurality of rods provided along a feed axis of a rod coinciding with a processing axis of a rod processing apparatus and spaced apart from each other. A guide rail having a guide rail including a guide rail portion, each of the guide rail portions is a gutter-shaped guide rail body that opens upward, and a lid member that liquid-tightly covers the upward opening of the guide rail body. And each of the guide rail portions is provided with an oil so that at least the inside of a longitudinal intermediate portion of the guide rail portion is substantially filled with oil during the feeding of the bar. Oil supply means is provided, and between the guide rail portion and a guide rail portion adjacent to the guide rail portion, for supporting the bar material such that the center axis of the fed bar material coincides with the feed axis. Anti-shock device There is interposed, it can be achieved by the bar feeder according to claim.

In the present invention, oil is supplied to the guide rail so that the inside of the longitudinally intermediate portion of the guide rail portion is substantially filled with oil by the oil supply means, and the rod material housed in the guide rail is provided. When is rotated at a high speed during processing, the center axis of the bar is supported by the hydrodynamic centripetal action of the oil so as to coincide with the feed axis. Further, the bar is supported by a vibration-preventing device provided between the guide rail portion and the guide rail portion adjacent thereto so that the center axis of the fed bar is coincident with the feeding axis. According to the present invention, the upward opening of the guide rail body is liquid-tightly covered by the lid member, while the both ends are an open semi-open system, so that the guide is formed to completely seal off the oil. This eliminates the need for a rail body and a lid member and a complicated opening / closing mechanism for the lid member, thereby preventing an increase in manufacturing cost. Further, in the present invention, in the bar feeder having the oil type guide rail, the intermediate portion of the bar is gripped by the vibration damping device, so that the intermediate portion of the bar is bent, Even when the original shape is bent, the bar can be supported such that the central axis coincides with the feeding axis. Therefore, the rod is not hit against the inner wall surface of the guide rail by the high-speed rotation, and noise and vibration can be prevented. Further, in the bar feeder according to the present invention, since the bar is gripped by the vibration damping device, the flow rate of the oil can be set large, and the bar is supplied by the pressure of the oil injected by the oil injection means. There is no need to control the oil injection pressure so as not to deviate from the feed axis OO.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
A preferred embodiment of the present invention will be described. FIG.
FIG. 1 is a side view schematically showing an entire bar feeder according to the present embodiment. As shown in FIG. 1, the bar feeder 2
It is arranged adjacent to the rear of the C automatic lathe N. The bar feeder 2 guides a bar 6 supported by the stand 4 and a bar W supported by the base 6 and extending toward the NC automatic lathe N toward the NC automatic lathe N. And a guide rail 8. The guide rail 8 has three guide rail portions 10 provided at a distance L from each other, a front guide rail portion 10a, an intermediate guide rail portion 10b, and a rear guide rail portion 10c.
Each of the guide rail portions 10a to 10c is a gutter-shaped guide rail body 12 that opens upward, and a lid member 14 that covers an upward opening of the guide rail body 12 in a liquid-tight manner.
And a lid member opening and closing mechanism 16a for opening and closing the lid member 14.
16c and oil supply means 18 for supplying oil to the inside of the guide rail portion 10 during feeding of the bar W.

[0008] The oil supply means 18 is provided in the guide rail portion 10.
a to 10 c, an oil inlet 20 provided toward the internal space, an adjustment valve 22 connected to the oil inlet 20 for adjusting the flow rate of oil, and connected to the adjustment valve 22. And an oil pump 24. Oil filler 20
As shown in FIG. 1, the guide rail portions 10a to 10a
One each is provided at a substantially central position in the longitudinal direction of each of the rear guide rails c, and another is provided only at the rear guide rail portion 10c at the rear as shown in FIG.
Further, the oil inlet 20 is located at a height position corresponding to the height of the feed axis OO in the cross section of the guide rail 8 (see FIG. 2).
), And extend horizontally toward the inside of the guide rail. The flow rate of the oil supplied by the oil pump 24 is
During the rotation of the bar W, at least the guide rail portions 10a to
At each intermediate portion in the longitudinal direction of 10c, the gap S between the rod W accommodated therein and the inner wall of the guide rail main body 12 and the lid portion 14 is set to be filled with oil. In the guide rail 8 of the present embodiment, the upward opening of each guide rail body 12 of each of the guide rail portions 10a to 10c is closed in a liquid-tight manner by the lid member 14, but both ends are opened. Is a semi-closed system. The oil supplied by the oil supply means 18 is supplied to each of the guide rail portions 10a, 10b, 10
It flows out from both ends of c. The spilled oil is on the guide rail 8
Is collected by an oil pan 26 extending over the entire length thereof, and is again supplied from there to an oil inlet 20 by an oil pump 24 and circulated.

Also, three guide rail portions 10a, 1
Roller-type anti-shake devices 28 are interposed in gaps L between the guide rail portions 10 of 0b and 10c adjacent to each other. Also, between the NC automatic lathe N and the frontmost guide rail portion 10a in the feeding direction of the bar W,
A roller type vibration damping device 28 is provided. As will be described later, the roller type vibration damping device 28 includes three rollers 30a.
During machining of the bar, the front end of the bar W is processed by the collet chuck of the NC automatic lathe N, and the rear end is processed by the finger chuck 32a of the feed arrow 32 described later. Feeding axis O- which coincides with the axis
Supported on O. However, the middle portion of the bar W may be bent by its own weight, or the center axis may not coincide with the feeding axis OO because the shape of the bar W is originally bent. In such a case, the intermediate portion of the bent or bent bar W is lifted from below by the roller type vibration damper 28 to the height of the feed axis OO.
The rollers 30a to 30c are arranged in a plane perpendicular to the feeding axis OO such that the center of the gap between them coincides with the feeding axis OO, and the rod to be fed is provided. The center axis of the material W coincides with the feed axis OO when gripped by the rollers 30a to 30c.

As described above, in the guide rail 8,
A feed arrow 32 for feeding the bar W to the NC automatic lathe N is accommodated therein. A finger chuck 32 a for gripping the rear end of the bar W is provided at the tip of the feed arrow 32. At the rear end of the feed arrow 32, a so-called "blade portion" 32b extending in the horizontal direction outside the upward opening of the gadrail body is attached.
Is connected to an endless chain (not shown) for moving the feed arrow 32 back and forth. The endless chain is attached to a servomotor 34 with an encoder 36 provided at the rear end of the guide rail 8, and is driven by the servomotor 34 via a sprocket (not shown) so that the feed arrow 32 moves the guide rail 32. Move back and forth within 8. At this time, the encoder 36 transmits a pulse signal corresponding to the moving amount of the endless chain, that is, the moving distance of the blade portion 32b of the feed arrow 32 to the controller 38, and the feed arrow 32
Is detected in the guide rail main body 12.

FIG. 2 is a sectional view taken along line II-II shown in FIG. 3 and 4 are views showing a state in which the upper roller of the roller-type vibration damping device is in a gripping position for gripping a bar, in which FIG. 3 shows a bar having a minimum diameter and FIG.
Indicates a state where the bar having the maximum diameter is supported. FIG. 5 is a plan view of the roller-type vibration damping device when viewed in the direction of arrow VV shown in FIG. Referring to FIG. 2, a plurality of bars (new materials) W to be newly supplied to the bar supply device 2, which extend obliquely toward the guide rails 8, are held diagonally above the guide rails 8. A material shelf 40 is provided. An index plate 42 for vertically taking out one new material W placed on the material shelf 40 and supplying the new material W to the guide rail 8 is provided vertically above the guide rail 8 adjacent to the material shelf 40. Are provided so as to be rotatable by the rotation shaft 43. A plurality of notches 42a of different sizes are formed in the peripheral portion of the indexing plate 42, corresponding to the diameter of the bar W to be processed. The operator releases the lock (not shown) for fixing the index plate 42 to the rotating shaft 43 before starting the processing of the bar W, and rotates the index plate 42 by hand.
Of the plurality of notches 42a, the notches 42a corresponding to the diameter d of the bar W to be processed (hereinafter, referred to as “predetermined notches”) are aligned with the material shelf 40 and placed on the material shelf 40. Then, the indexing plate 42 is again fixed to the rotating shaft 43 by the lock. The plate-shaped notch covering member 41 is attached to the rotation shaft 43 by the index plate 4 in FIG.
It is attached to the back of 2. The notch cover member 41 is formed in a substantially fan shape having substantially the same arc as the index plate 42. The notch cover member 41 is provided to cover notches other than the predetermined notch among the plurality of notches 42a. More specifically, a notch aligned with the material shelf 40 while the index plate 43 rotates by the angle α shown in FIG. 2 in order to supply the bar material placed on the material shelf 40 to the guide rail 8. To be covered therewith, so that the index plate 43
Is rotated, the bar W placed on the material shelf 40 is received in a notch other than the predetermined notch, or the corner of the notch 42a hits the bar W and is damaged. Or to prevent them from being given. The notch cover member 41 is fixed by the operator at the above-described relative position with respect to the index plate 43 each time.

As shown in FIG. 2, the roller type vibration damping device 28 is provided symmetrically with respect to three rollers 30a to 30c, that is, below the feeding axis OO and across the feeding axis OO. And two upper rollers 30b and 30c, and one upper roller 30a provided vertically above the feed axis OO. The bar W is sandwiched between the three rollers 30a to 30c. It is designed to be gripped. The horizontal movement of the bar W is restricted by the two lower rollers 30b and 30c provided symmetrically with respect to the feeding axis OO, and the bar W is positioned on the feeding axis OO in the horizontal direction. . Further, the movement of the bar W in the vertical direction is restricted by one upper roller 30a provided vertically above the feed axis OO, and the bar W is positioned on the feed axis OO in the vertical direction. The upper roller 30a is rotatably supported by one end of a rod-shaped upper roller support member 44 extending in a direction away from the guide rail 8. The upper roller support member 4
4 is pivotally attached to a rotary arm member 46 extending radially outward from the rotary shaft 43 of the index plate 42. With the rotation of the rotary shaft 43, the index plate 42 and the upper roller 30 are rotated.
a rotates integrally. 3 and 4
As shown in FIG. 7, when the predetermined notch 42a is aligned with the material shelf 40, the upper roller 30a is at an angular position aligned with the guide rail 8, and their internal angle α is set to 110 degrees. Upper roller 30a of upper roller support member 44
The first tension spring 48 is connected to the end on the side where is pivoted and the indexing plate 42, whereby the upper roller 30a is urged away from the lower rollers 30b and 30c. I have.

As can be seen from FIG.
Is provided below the guide rail 8, and the two lower rollers 30b and 30c are symmetrically disposed below the guide rail 8 with respect to the horizontal support member 50 with respect to the feed axis OO. It is rotatably mounted. In order to independently open and close the rollers 30a to 30c of each roller type anti-shake device 28 between the gripping position and the release position, each of the roller type anti-shake devices 28 includes a horizontal support member 50.
Is provided with a lower roller moving cam mechanism 52a, 52b or 52c. Lower roller moving cam mechanism 5
2a to 52c are controlled by the controller 38, and when the new material W is supplied to the guide rail main body 12, the horizontal support member 50 is moved downward so as not to hinder the introduction of the new material W. Two lower rollers 30
b and 30c are moved below the guide rail 8. Thereafter, the horizontal support member 50 is moved upward to move the lower rollers 30b and 30c to an upper position where the bar W is gripped. The main body of the bar feeder 2 is provided with two guide portions 54 protruding upward in the vertical direction, and the horizontal support members 50 are provided therethrough so that they are guided by these when moving up and down. Has become.

Lower roller moving cam mechanism 52a-52c
Each has one end attached to the main body of the bar feeder 2 via a pivot 68, the other end extending to the center of the horizontal support member 50 and engaging therewith, and the corner 58 a swinging. An L-shaped member 58 provided coaxially with the pivot 68 of the moving arm member 56 but rotatable relative to the swing arm, and a roller follower 62 provided at one end of the L-shaped member 58 and a roller And first cams 60a to 60c that engage with the followers 62. As will be described later, when the finger chuck 32a approaches or when the wing portion 32b of the feed arrow 32 approaches, the lower rollers 30b and 30c need to be moved to a lower position in order to pass them. In order to support the bar as much as possible by the damping device and prevent the bar W from swaying, it is desirable to open only the roller-type damping device 28 to which the finger chuck 32a or the blade portion 32b has approached. Accordingly, the first cams 60a to 60c of the respective lower roller moving cam mechanisms 52
The lower rollers 30b and 30c are provided at different timings.
have different contours to move c. FIGS. 2 to 4 show, as an example, the first cam 60c located at the rearmost position in the feeding direction.

The L-shaped member 58 has a lateral portion 58b oriented substantially parallel to the horizontal support member 50, and a longitudinal portion 58c extending downward toward the first cam 60c.
The vertical portion 58 of the swing arm member 56 and the L-shaped member 58
c form a substantially L-shape as a whole. A roller follower 62 that contacts the first cam 60c is provided at a lower end of the vertical portion 58c. The horizontal support member 50
A vertical support member 70 protruding upward is provided at the opposite end of the lower roller moving cam mechanism 52. As described above, the end of the upper roller supporting member 44 that supports the upper roller 30 a on the side where the upper roller 30 a is provided is urged upward by the first tension spring 48.
On the other hand, when the other end of the upper roller support member 44 is pushed upward by the vertical support member, the upper roller 3
At the gripping position 0a, the upper roller 30a is urged downward with respect to the bar W to prevent the bar W from swinging upward.

As can be seen from FIGS. 3 and 4, the swing arm member 56 includes a lateral portion 58b of an L-shaped member 58.
A screw member 64 abutting on the end of the horizontal portion 58b is provided in a direction perpendicular to the lateral portion 58b. Swing arm member 56
, One end of a second tension spring member 66 is attached, the other end of the second tension spring member 66 is attached to the main body of the bar feeder 2, and the swing arm member 56 springs downward about a pivot 68. Being energized. As a result, the horizontal portion 58b of the L-shaped member 58 is pushed downward by the screw member 64, and the roller follower 62 provided in the vertical portion 58c is pressed.
Is biased against the contour surface of the first cam 60c. The size of the angle β between the vertical portion 58c of the L-shaped member 58 and the swing arm member 56 is adjusted by the screw member 64,
The height positions of the lower rollers 30b and 30c are set such that the center axis of the bar W is supported at a height that coincides with the feed axis OO regardless of the diameter of the bar W to be processed. It is supposed to. More specifically, FIG. 3 shows a state in which a thin bar W is supported, in which a screw member 64 is screwed and protrudes downward, and the swing arm member 56 and the vertical portion 58c of the L-shaped member 58 are shown. Is widened. Since the direction of the vertical portion 58c of the L-shaped member 58 is determined by the contour of the first cam 60c, the tip of the swing arm member 56 is pivoted by the increase of the angle β.
To the horizontal support member 5 at the gripping position.
Push up 0. That is, the lower roller moving cam mechanism 5
When the lower rollers 30b and 30c are moved to the gripping position by the second roller 2, the center axis of the bar W having the smallest diameter that can be fed by the bar feeder 2 is the same as the feed axis OO of the guide rail 8 and The lower rollers 30b and 30c are moved to a position higher than the bottom wall of the feeding passage P of the guide rail main body 12 so that the lower rollers 30b and 30c are lifted to the same position.

FIG. 4 shows a case in which a bar W having a maximum diameter which can be fed by the bar feeder 2 is gripped. If the diameter of the bar W to be processed is large, the screw member 6
4 is rotated in the direction to remove, and the amount of downward projection is reduced.
This reduces the angle β between the vertical portion 58c of the L-shaped member 58 and the swing arm member 56. Thereby, the horizontal support member 50 is supported at a relatively low height position by the swing arm member 56 at the gripping position.
That is, when the lower rollers 30b and 30c are moved to the gripping position by the lower roller moving cam mechanism 52, the center axis of the bar W having the largest diameter that can be fed by the bar feeder 2 is aligned with the guide rail 8. The lower rollers 30b and 30c are connected to the guide rail main body 1 so that the lower rollers 30b and 30c are supported by the rollers 30a to 30c at positions corresponding to the feeding axis OO.
The second U-shaped channel moves only at a position slightly higher than the inner wall, more specifically, only a distance of the gap S upward from the inner wall.

As can be seen from FIG. 5, the distance L between the adjacent guide rail portions 10 is set to a minimum and a sufficient distance for interposing the roller type vibration damping device 28. . This is because the center axis of the bar W is supported along the feed axis OO by the hydrodynamic centripetal action as much as possible of the bar W. On the other hand, it is difficult to support the center axis of the bar W along the feed axis OO by the hydrodynamic centripetal action of the oil alone, and the middle portion of the bar is bent or bent. The part is a roller supporting and damping device 28 provided between the guide rail portions 10.
Backed by. FIGS. 6 and 7 show the line VI- shown in FIG.
FIG. 6 is a cross-sectional view taken along a line VI, showing details of a mechanism for opening and closing a cover member of the guide rail. 6 shows a state in which the lid member is closed, and FIG. 7 shows a state in which the lid member is retracted to open the guide rail body.

As shown in FIG. 6, the guide rail portion 10
The upward openings of each of the guide rail bodies 12 a to 10 c are closed by a lid member 14 in a liquid-tight manner. On the side of the guide rail 8, guide rail portions 10a to 1
In order to open and close each of the lid members 14c independently of each other, lid member opening / closing cam mechanisms 72a to 72c are provided for each of the lid members 14. A link mechanism 74 for opening and closing the lid member 14 is provided between the guide rail 8 and the lid member opening / closing cam mechanisms 72a to 72c, one end of the link mechanism 74 is connected to the lid member 14, and A roller follower 76 provided at an end is in contact with the second cams 78a to 78c of the lid member opening / closing cam mechanism 72.
The lid member 14 is moved between a closed position shown in FIG. 6 and an open position shown in FIG. 7 by controlling the lid member opening / closing cam mechanisms 72a to 72c by the controller 38. As will be described later, when the blade portion 32b of the feed arrow 32 approaches, the lid member 14 needs to be moved to a retracted position in order to pass through the blade portion 32b. As described above, in order to support as much of the rod W as possible by the hydrodynamic centripetal action of the oil, the lid member 14 with the blade portion 32b approached.
Open, leaving the remaining lid member 14 closed. As described above, in order to move the lid member 14 at different timings, the second cams 78 of the respective lid member opening / closing cam mechanisms 72 have different contours. 6 and 7 show, by way of example, the second cam 78c located at the rearmost position in the feeding direction.

The guide rail 8 will be described in more detail with reference to FIG. 6. When the upward opening of the guide rail main body 12 is closed by the lid member 14, a feed passage P having a substantially circular cross section is formed inside the guide rail 8. Is formed.
The inner diameter D of the feed passage P is slightly larger than the diameter d of the largest diameter bar W that can be fed by the bar feeder 2 according to the present embodiment, and the hydrodynamic centripetal movement caused by the rotation of the bar W is performed. By the action, a layer of oil is formed in the gap S between the two,
The bar W is supported on the feed axis OO. The guide rail body 12 is made of a U-shaped iron core and a resin, and the cover member 14 is made of a resin. Preferably, the resin is a urethane resin. The bar feeder 2 according to the present invention operates as follows. First, the operator releases the lock of the indexing plate 42 and manually operates the indexing plate 42 so that the predetermined notch 42a of the indexing plate 42 corresponding to the diameter of the bar W to be processed is aligned with the material shelf 40. 42 is rotated, and is again fixed to the rotating shaft 43 by the lock. As shown in FIG. 3 or FIG. 4, of the bars W placed on the material shelf 40, the bar W adjacent to the index plate 42 is obliquely downward along the upper surface of the inclined material shelf 40. And is received in the predetermined notch 42a. In addition, the operator can move the swing arm member 56.
By adjusting the amount of downward projection of the screw member 64 provided on the L-shaped member 58 to adjust the magnitude of the angle β between the vertical portion 58c of the L-shaped member 58 and the swing arm member 56,
The height position of the lower rollers 30b, 30c at the gripping position is adjusted.

In the initial position of the bar feeder 2, the feed arrow 32 is at the retracted position behind the guide rail 8 as shown in FIG. 1, and the upper roller 30a and the lower roller 3b and 30c are in the gripping position as shown in FIGS. The lid member 14 is also in the closed position as shown in FIG. When the bar feeder 2 is started, the index plate 42 is rotated clockwise by the controller 38, whereby the bar W received in the predetermined notch 42a moves to a position vertically above the guide rail 8. Is done. At the same time, the upper roller 30a fixed to the index plate 42 also rotates clockwise and moves to the retracted position shown in FIG. The lower rollers 30b and 30c are moved to a lower retreat position by the lower roller moving cam mechanism 52. Also, in synchronization with this, all the lid members 14
Is moved to the open position shown in FIG. 7 by the link mechanism 74 and the lid member opening / closing cam mechanism 72. Predetermined notch 42
When a moves to a position vertically above the upward opening of the guide rail main body 12, the bar W is dropped into the guide rail main body 12 and thrown.

Next, the index plate 42 is connected to the controller 38.
As a result, the predetermined notch 42a is turned counterclockwise to a position where it is aligned with the material shelf 40. Accordingly, the upper roller 30a is moved to the grip position. Further, the lower rollers 30b and 30c are moved upward to the gripping position by the lower roller moving cam mechanism 52. In synchronization with this, the lid members 14 of all the guide rail portions 10a to 10c are connected to the link mechanism 74 and the lid member opening / closing cam mechanism 72.
Is moved to the closed position shown in FIG. Then
A pusher (not shown) pushes the rear end of the bar W supplied into the feed path P of the guide rail 8 toward the NC automatic lathe. When the bar W advances to the NC automatic lathe N, the bar W
Is gripped by the clamp device. Then
The feed arrow 32 advances, and stops at a temporary stop position where the finger chuck 32a is hidden below the lid member 14. When the clamp device retreats, the rear end of the bar W is inserted into the finger chuck 32 a of the feed arrow 32.
In this position, the entire bar W is accommodated below the lid member 14.

Further, the oil pump 24 is operated by the controller 38, and during the processing of the rod material, the oil is supplied to the oil inlet 20.
From the feed passage P of the guide rail 8. Thereby, the gap S between the peripheral surface of the bar W and the inner wall surface of the feed passage P in the intermediate portion of the guide rail portion 10 is filled with the oil. When the bar W rotates, the bar W
Hydrodynamic centripetal force of oil acts on the entire peripheral surface of the rod, the rod W floats, and its axis is aligned with the feed axis OO of the guide rail 8.
And the contact between the bar W and the inner wall surface of the feed passage P is prevented. At this time, the intermediate portion of the bar W is supported by the roller-type vibration damper 28 at a position where the center axis of the bar W coincides with the feed axis OO. Further, the controller 38 controls the feed arrow 3 by the encoder 36.
Based on the position information of No. 2, it is detected whether the finger chuck 32a of the feed arrow 32 has approached the roller type anti-shake device 28. When the controller 38 determines that the finger chuck 32a of the feed arrow 32 has approached the roller backrest device 28 that is the most rearward in the feeding direction, the first cam 60c of the lower roller moving cam mechanism 52c rotates. The tip of the swing arm member 56 is lowered. Thus, the horizontal support member 5 supporting the lower rollers 30b and 30c
0 moves toward the retreat position below enough to allow the finger chuck 32a to pass through. Accordingly, the vertical support member 70 provided at the end of the horizontal support member 50 also moves downward. As a result, the other end of the upper roller support member 44 that is in contact with the upper end of the vertical support member 70 is lowered, and the upper roller support member 44 is rotated counterclockwise about the pivot 45 by the first tension spring 48. , The upper roller 30a provided at one end is the finger chuck 3
It moves upward toward the retreat position so that 2a can pass through. This allows the finger chuck 32a to pass through. When the finger chuck 32a passes,
The controller 38 moves the rollers 30a to 30c of the roller type vibration damping device 28 to the gripping position again, and
a to 30c, the body of the feed arrow 32 is gripped,
To prevent run-out of the rear end. As the processing of the bar W progresses, the bar W is cut off one after another and becomes shorter.
When the finger chuck 32a approaches the next roller type anti-shake device 28, the controller 38 sequentially opens the rollers 30a to 30c of the roller type anti-shake device 28 in the same manner.

The controller 38 includes an encoder 36
The position of the wing portion 32b of the feed arrow 32 is detected based on the position information of the feed arrow 32. When the bar W is shortened with the progress of the processing of the bar W, and the controller 38 determines that the blade portion 32b of the feed arrow 32 has approached the roller-type anti-vibration device 28 at the rearmost position in the feeding direction. , The first cam 60c of the lower roller moving cam mechanism 52c
Rotates, and the tip of the swing arm member 56 descends.
Thereby, the horizontal support member 50 supporting the lower rollers 30b and 30c moves toward the retreat position below enough to allow the blade portion 32b to pass. Accordingly, the vertical support member 70 provided at the end of the horizontal support member 50 also moves downward. As a result, the other end of the upper roller support member 44 abutting on the upper end of the vertical support member 70 is lowered, and the upper roller support member 44 is rotated counterclockwise about the pivot 45 by the first tension spring 48. The upper roller 30a provided at the one end moves upward to the retreat position so that the blade portion 32b can pass through.
As a result, the passage of the blade portion 32b becomes possible. After passing through the blade portion 32b, the upper roller 30a and the lower rollers 30b, 30c are maintained at this position until the next input of the new material W.

At the same time, the controller 38 detects the feed arrow 3 based on the detected position information of the blade portion 32b of the feed arrow 32.
When it is determined that the second blade portion 32b has approached the lid member 14 of the guide rail portion 10c located at the rearmost position,
The cover member 14 is moved to the open position so that the blade portion 32b of the feed arrow 32 can move forward. At the same time, the controller 38 stops the oil pump 24 that supplies oil to the rearmost guide rail portion 10c, and
Stop oil supply to zero. Similarly, the lid member 14 is sequentially opened from the rear to the front. The bar material W is processed one after another,
When the length becomes such that the product cannot be processed, the remaining material is taken back by the finger chuck 32a,
It is discharged through a remaining material discharge port (not shown), and the processing of one bar W is completed.

Next, the rotation of the rotating shaft 43 rotates the indexing plate 42 to move the new material W received in the predetermined notch 42a toward the guide rail 8, and the rotating arm member 46 The upper roller 30a rotates and moves to the retracted position. In synchronization with this, the lower roller 30b,
30c is lowered to the retracted position. When the predetermined notch 42a moves to a position vertically above the guide rail 8, a new material W is introduced into the guide rail main body 12, and the above steps are repeated. FIG. 8 is a perspective view schematically showing a modified example of the roller type vibration damping device. In the roller oscillating device 28 'shown in FIG. 8, similarly to the roller type oscillating device 28 shown in FIGS. 2 to 5, it is symmetrical below the feed axis OO and across the feed axis OO. Has two lower rollers 30b and 30c provided in the first and second rollers. Further, two upper rollers 30d and 30e are provided vertically above the feeding axis OO. The upper rollers 30d and 30e are arranged in a direction orthogonal to an imaginary line connecting the rotation center of the lower roller 30b and the rotation center of the lower roller 30c, that is, the feed axis OO.
Are provided symmetrically, one on each side, with the imaginary line interposed therebetween, on a rotating shaft 80 provided in parallel with.

According to the present embodiment, the intermediate portion of the bar W and the main body of the feed arrow are supported on the feed axis OO by the roller type vibration damping device 28. It is possible to prevent the middle portion of W from being hit against the inner wall of the guide rail portion 10 to generate noise and vibration. In the present embodiment, the oil injection port 20 extends horizontally toward the inside of the guide rail 8 at a height position corresponding to the height of the feed axis OO in the cross section of the guide rail 8. Therefore, when the flow rate is large, the hydraulic pressure is applied to the bar W in a lateral direction, and the bar W may be deviated from the feed axis OO. However, in the present embodiment,
Since the intermediate portion of the bar W is gripped by the roller type vibration-reducing device 28 so that the center axis of the bar W is aligned with the feed axis OO, the lateral movement is restricted, and the bar is moved by hydraulic pressure. The material does not deviate from the feed axis OO. Therefore, it is not necessary to adjust the flow rate of the oil injected into the guide rail 8 in consideration of the oil pressure applied to the bar W.

That is, when the oil injection amount is increased, a lateral force is applied to the rod W by the pressure of the oil flowing in the lateral direction with respect to the rod W, thereby overcoming the hydrodynamic centripetal force of the oil. As a result, the rod W is pressed toward the side wall of the feed passage P opposite to the oil inlet 20. When the bar W rotates in this state, the bar W comes into contact with and hits the inner wall surface in the feed passage P, and vibration and noise are generated. Particularly, since the area of the peripheral surface receiving the hydraulic pressure is large, the rod W
Tends to occur when the diameter is large. As described above, in the present embodiment, it is not necessary to adjust the flow rate of the oil injected into the guide rail 8 from the viewpoint of the hydraulic pressure applied to the bar W, so that the oil flow rate can be adjusted without considering the hydraulic pressure. It can be determined based on other conditions. For example, after increasing the flow rate of the oil and closing the guide rail body 12 with the lid member 14, the gap S between the guide rail 8 and the bar W is filled with oil in a short time, and the bar W is processed. The preparation time until the start may be shortened. Further, the guide rail 8 according to the present embodiment is a semi-closed system in which both ends of the plurality of guide rail portions 10 are open, and oil flows out from both ends of each guide rail portion 10. . Therefore, oil is supplied to the guide rail portion 10 at a flow rate that is equal to or greater than the amount of oil flowing out from both ends of the guide rail portion 10, and an area where the gap S between the intermediate portions of the guide rail portion 10 is as long as possible It may be filled with oil. Even if oil is supplied at a relatively large flow rate as described above, the intermediate portion of the bar W is gripped by the roller type vibration damping device 28, so that the bar W
Does not deviate from the feed axis OO, and the rod W rotates at a high speed and is not hit against the inner wall surface of the guide rail 8 to generate noise or vibration.

The guide rail portions 1 adjacent to each other
Since the distance L from zero is a necessary and sufficient distance to interpose the roller type vibration damping device 28, the effect of supporting the bar by the hydrodynamic centripetal action of the oil type guide rail 8 is maximized. And the effect of holding the bar W on the feed axis OO by the roller anti-vibration device 28 can be obtained. Further, in the roller type vibration damping device 28 shown in FIGS. 2 to 5, they are arranged symmetrically with respect to the feeding axis OO, and the bar W can be positioned in the lateral direction between them. Since it has two lower rollers 30b and 30c and one upper roller 30a which is provided above the feeding axis OO in the vertical direction and can prevent the deviation in the vertical direction, the lower roller 30b is provided in the horizontal direction and the vertical direction. In both, movement is regulated,
The center axis of the bar W can be reliably held at a position aligned with the feed axis OO.

Further, a rotor anti-shake device 28 'shown in FIG.
, The upper rollers 30d and 30e are arranged in a direction orthogonal to an imaginary line connecting the rotation center of the lower roller 30b and the rotation center of the lower roller 30c, that is, the feed axis OO.
Are provided symmetrically, one on each side, with the imaginary line interposed therebetween, on a rotating shaft 80 provided in parallel with. Accordingly, the bar W is moved from above to the lower rollers 30b, 3b.
0c, the lower rollers 30b, 3b
0c, it is possible to prevent the center axis of the bar W from deviating from the feed axis OO without giving a force deviated in the longitudinal direction to the bar W. it can. The present invention is not limited to the above embodiments,
It is needless to say that various modifications can be made within the scope of the invention described in the claims, and these are also included in the scope of the present invention.

For example, the roller type anti-shake device 28 shown in FIGS. 3 to 5 has three rollers 30a to 30c, and the roller type anti-shake device 28 'shown in FIG. 30b to 30e, but in a plane perpendicular to the feed axis OO, if the center of the gap between the plurality of rollers matches the feed axis OO,
The number and arrangement of the rollers 30 of the roller type vibration damping device 28 are as follows:
Any configuration may be used. Also, in the roller type vibration damping device 28 'shown in FIG.
The rotating shaft 80 supporting the d and 30e is connected to the lower roller 30b.
Is preferably provided in a direction perpendicular to an imaginary line connecting the rotation center of the lower roller 30c and the rotation center of the lower roller 30c, that is, in parallel with the feeding axis OO. An angle may be formed on the horizontal plane with respect to the axis OO, as long as two upper rollers 30d and 30e are provided one on each side so as to sandwich the virtual line. Also, they need not necessarily be symmetrical between the virtual lines.

Further, in order to hold the bar W at a position where the center axis is aligned with the feeding axis OO, it is desirable that the anti-shake device 28 is a roller type, but the anti-shake device 28 is a belt type. There may be. Further, in the above embodiment, the case where the guide rail 8 has three guide rail portions 10 has been described, but the number of the guide rail portions 10 is as follows.
What is necessary is just to determine how many intermediate parts of the bar W need to be gripped by the roller-type vibration damper 28 according to the length of the new material W to be processed. Further, the length of each guide rail portion 10 may be determined so that at least the intermediate portion of the guide rail portion 10 is filled with oil when oil is injected by the oil pump 24.

Further, in the above-described embodiment, the oil inlet is formed so that the feed axis OO
Extends in the horizontal direction toward the inside of the guide rail at a height position corresponding to the height of the guide rail 8. Alternatively, it may be provided at any position in the cross section of the guide rail 8 such as the cover member 14.
Further, in the above-described embodiment, the oil inlets 20 are provided one by one at substantially the center positions of the guide rail portions 10 in the longitudinal direction, respectively, but substantially fill the intermediate portion of the guide rail portions 10 with oil. May be provided at any position in the longitudinal direction. The entirety of the guide rail 8 and the material shelf 40 in the present embodiment is an oil scattering prevention cover for preventing oil flowing out from both ends of the guide rail portion 10 from scattering around during rotation of the bar W. May be surrounded by

[0034]

According to the present invention, an oil-type bar having a simple structure, in which the vibration and noise of the bar can be more effectively prevented and the bar can be processed more precisely. A feeder can be provided.

[Brief description of the drawings]

FIG. 1 is a side view schematically showing an entire bar feeder according to the present embodiment.

FIG. 2 is a sectional view taken along the line II-II shown in FIG.

FIG. 3 is a view showing a state in which an upper roller of the roller-type vibration damper is at a gripping position for gripping a bar, and shows a state where a bar having a minimum diameter is supported;

FIG. 4 is a view showing a state in which an upper roller of the roller type vibration damping device is at a gripping position for gripping a bar, and shows a state where a bar having a maximum diameter is supported.

FIG. 5 is a plan view of the roller type vibration damping device when viewed in the direction of arrow VV shown in FIG.

FIG. 6 is a sectional view taken along line VI-VI shown in FIG. 1;
It is a figure which shows the detail of the opening / closing mechanism of the cover member of a guide rail, and shows the state in which the cover member was closed.

FIG. 7 is a sectional view taken along the line VI-VI shown in FIG. 1;
It is a figure which shows the detail of the opening-and-closing mechanism of the cover member of a guide rail, and shows the state which retracted the cover member and opened the guide rail main body.

FIG. 8 is a perspective view schematically showing a modified example of the roller type vibration damping device.

[Explanation of symbols]

 2 bar feeder 8 guide rail 10 guide rail portion 12 guide rail main body 14 lid member 18 oil supply means 20 oil injection port 28 roller type vibration damping device 30 roller 32 feed arrow 28 'roller vibration damping device

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B23B 13/02 B23B 13/08

Claims (3)

(57) [Claims] 1. A guide rail for guiding a bar to a bar processing device, the guide rail being provided along a bar feed axis coinciding with a processing axis of the bar processing device. And includes a plurality of guide rail portions provided at an interval from each other, each of the guide rail portions, a gutter-shaped guide rail body opened upward,
A lid member for liquid-tightly covering the upward opening of the guide rail main body, wherein both ends of the guide rail main body are open in a state where the opening is covered by the lid member; Each of the guide rail portions is provided with oil supply means for supplying oil so that at least the inside of the longitudinal intermediate portion of the guide rail portion is filled with oil during the feeding of the bar material, Between the guide rail portion and the guide rail portion adjacent to the guide rail portion, an anti-vibration device for supporting the bar material is provided so that the center axis of the fed bar material coincides with the feed axis. , A bar feeder. 2. The bar material damping device is provided below the feed axis and two lower rollers provided symmetrically with respect to the feed axis, and is provided vertically above the feed axis. The bar feeder according to claim 1, further comprising one upper roller. 3. An upper roller is rotatably supported at one end of an upper roller support member, and a middle portion of the upper roller support member extends radially outward from a rotation axis of an index plate. The upper roller support member is pivotally attached to a member, and the one end on the side where the upper roller is provided is urged upward by a spring, and the lower roller is rotatable by a horizontal support member. The horizontal support member has an upwardly projecting portion for pushing up the other end of the upper roller support member so as to urge the upper roller downward against the bar. A vertical support member is further provided, and the bar material damping device further includes a lower roller moving cam mechanism for moving the horizontal support member in a vertical direction, and the lower roller moving cam mechanism Horizontal support member Above or is a downward movement, the upper roller and the lower roller, to open and close between a gripping position and an open position, the bar feeder according to claim 2, characterized in that.