JP6784392B2 - Bar material feeder - Google Patents

Description

The present invention relates to a bar material feeder for feeding a bar material to a spindle base of a spindle moving type bar material processing machine such as a lathe.

Conventionally, there has been known a bar material feeder that feeds a bar material to a spindle base of a spindle moving type bar material processing machine by a feed member (feed arrow). The feed member is generally connected to an endless chain wound around a sprocket that is rotationally driven by a motor. A finger chuck for gripping the rear end portion of the rod material is provided at the front end of the feed member, and the rear end portion of the rod material is inserted into the finger chuck.

As the feed member moves forward as the endless chain travels, the bar material is fed toward the bar material processing machine. When the tip of the bar moves to a predetermined position on the bar processing machine, the bar is gripped by the collet chuck of the bar processing machine. After that, the bar is processed while the headstock moves back and forth.

When the bar processing machine is a spindle moving type, the feed member of the headstock is used so that the rear end of the bar does not come off from the finger chuck and the bar is not loaded during the bar processing. It is preferable to move in conjunction with the movement.

For example, Patent Document 1 by the Applicant describes a feed member endless chain 22 that supports the feed member 12, and a feed member interlocking rotating body 20 that rotates and moves in conjunction with the movement of the feed member endless chain 22. In a configuration having a headstock endless chain 50 connected to the headstock 6 and a headstock interlocking rotating body 48 that rotates and moves in conjunction with the movement of the headstock endless chain 50, the feed member is provided by the clutch means 30. The interlocking rotating body 20 and the headstock interlocking rotating body 48 are detachably connected to each other (see FIG. 4: a diagram corresponding to FIG. 1 of Patent Document 1).

JP 2001-246502

When processing a bar with a bar processing machine, if a bar with a diameter smaller than the planned diameter of the bar is supplied, the collet chuck will not be able to grip the bar sufficiently, and the desired machining can be performed. Not only is it impossible to carry out, but the bar material rotated for processing hits the element members (inner wall, etc.) of the bar material processing machine and bar material feeder, causing noise and damage.

It is also a good idea to prepare a separate diameter measuring device to check the diameter of the bar in advance. However, measuring instruments that accurately measure the diameter of thin rods are quite expensive.

The present invention has been devised based on the above background. An object of the present invention is to provide a bar material feeder for supplying a bar material to a collet chuck provided on a headstock, and having a function of checking the diameter of the bar material at low cost. That is.

The present invention is a bar material feeder for supplying a bar material to a collet chuck provided on a headstock, which is provided so as to be movable in the axial direction of the collet chuck with respect to reference coordinates and ends of the bar material. The headstock is also provided with a feed member that feeds the rod material so as to pass through the collet chuck by pushing the portion, and a feed control unit that controls the movement of the feed member. The collet chuck is movable in the axial direction of the collet chuck, and the diameter of the collet chuck is reduced when the end portion of the bar is pushed by the feed member and passes through the collet chuck by a predetermined length. In the bar material feeder, the feed member or the feed member is moved so that the movement of the feed member with respect to the reference coordinates and the movement of the headstock with respect to the reference coordinates are integrally performed in the same direction and at the same distance. A clutch means for detachably connecting the feed member interlocking member that moves with the movement of the feed member with respect to the reference coordinates and the headstock or the headstock interlocking member that moves with the movement of the headstock with respect to the reference coordinates. Further, a connection control unit for controlling the attachment / detachment of the clutch means is further provided, and the connection control unit does not connect the clutch means even if the collet chuck is reduced in diameter in the bar diameter confirmation mode. The connection control unit is configured to connect the clutch means when the collet chuck is reduced in diameter unless the rod diameter confirmation mode is used, and the feed control unit is in the rod diameter confirmation mode. In the above, after the collet chuck has been reduced in diameter and the coupling control unit does not engage the clutch means, the feed member is further moved to move the rod member diameter confirmation. The bar material feeder is provided with a discriminating unit for determining whether or not the feed member that receives the action of the feed control unit in the mode actually moves.

According to the present invention, in the bar diameter confirmation mode, the feed control unit acts to further move the feed member after the collet chuck has been reduced in diameter and the clutch means is not connected, and this action is performed. By determining whether or not the receiving member actually moves, it is possible to inexpensively and accurately confirm that the diameter of the rod material is appropriate for the collet chuck.

For example, the feed member interlocking member includes an endless member for a feed member that supports the feed member, and a feed member interlocking rotating body that rotates and moves in conjunction with the movement of the endless member for the feed member. The headstock interlocking member includes an endless member for a headstock connected to the headstock and a headstock interlocking rotating body that rotates and moves in conjunction with the movement of the endless member for the headstock. The clutch means is adapted to detachably connect the feed member interlocking rotating body and the headstock interlocking rotating body.

In this case, each component can be manufactured at low cost, and each component can be operated stably.

Further, in this case, it is preferable that the feed control unit controls the movement of the feed member via a motor capable of driving the endless member for the feed member, and the discriminating unit is of the motor. It is preferable to have an encoder provided inside.

In this case, the discriminating unit can be manufactured at low cost, and the discriminating unit can be operated stably.

The discriminating unit determines whether or not the feed member that receives the action of the feed control unit actually moves by a predetermined length or more in the bar diameter confirmation mode. It is preferable that the predetermined length can be arbitrarily set. For example, the predetermined length can be arbitrarily set within the range of 1 mm to 200 mm.

The clutch means in the above invention can be replaced by a synchronization means that synchronizes the movement of the feed member and the movement of the headstock. In that case, the connection control unit will be responsible for controlling the operation or interruption of the synchronization means. Such an invention is a bar material feeder for supplying a bar material to a collet chuck provided on a headstock, which is provided so as to be movable in the axial direction of the collet chuck with respect to reference coordinates. The headstock is also provided with a feed member that feeds the rod material so as to pass through the collet chuck by pushing the end portion of the feed member, and a feed control unit that controls the movement of the feed member. The collet chuck is movable in the axial direction of the collet chuck, and the diameter of the collet chuck is reduced when the end portion of the bar is pushed by the feed member and passes through the collet chuck by a predetermined length. In the bar material feeder, the feed member is moved so that the movement of the feed member with respect to the reference coordinate and the movement of the headstock with respect to the reference coordinate are integrally performed in the same direction by the same distance. Further includes a synchronization means for synchronizing the movement of the headstock and the movement of the headstock, and a synchronization control unit for operating the synchronization means. In the synchronization control unit, in the bar diameter confirmation mode, the collet chuck is reduced in diameter. However, the synchronization means is not activated, and the synchronization control unit connects the clutch means when the collet chuck is reduced in diameter unless the rod diameter confirmation mode is used. The feed control unit acts to further move the feed member in the bar diameter confirmation mode after the collet chuck has been reduced in diameter and the synchronization control unit has not operated the synchronization means. A discriminant unit for determining whether or not the feed member that receives the action by the feed control unit actually moves in the bar diameter confirmation mode is provided. It is a bar material feeder.

According to the present invention, in the bar diameter confirmation mode, the feed control unit acts to further move the feed member after the collet chuck has been reduced in diameter and the synchronization means is not operated, and this action is performed. By determining whether or not the receiving member actually moves, it is possible to inexpensively and accurately confirm that the diameter of the rod material is appropriate for the collet chuck.

According to the present invention, in the bar diameter confirmation mode, the feed control unit acts to further move the feed member after the collet chuck has been reduced in diameter and the clutch means is not connected, and this action is performed. By determining whether or not the receiving member actually moves, it is possible to inexpensively and accurately confirm that the diameter of the rod material is appropriate for the collet chuck.

Alternatively, according to the present invention, in the bar diameter confirmation mode, the feed control unit acts to further move the feed member after the collet chuck has been reduced in diameter and the synchronization means is not operated. By determining whether or not the feed member to be acted actually moves, it can be confirmed inexpensively and accurately that the diameter of the rod material is appropriate for the collet chuck.

It is a schematic perspective view of the bar material feeder which concerns on one Embodiment of this invention. It is an enlarged view of the collet chuck of FIG. It is the schematic which shows the operation flow of the bar material feeder which concerns on one Embodiment of this invention. It is a schematic perspective view of a conventional bar material feeder (a figure corresponding to FIG. 1 of Patent Document 1).

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic perspective view of a bar material feeder 102 according to an embodiment of the present invention. The bar material feeder 102 of the present embodiment is a bar material feeder that supplies the bar material to the collet chuck 110 provided on the headstock 106.

The feed arrow 112 as a feed member is provided so as to be movable in the axial direction of the collet chuck 110 with respect to the reference coordinates (the position of the rotation axis of the feed member interlocking rotating body 120 described later in this embodiment), and the finger chuck 112b. By pushing the end portion of the bar material through the rod material, the rod material is sent out so as to pass through the collet chuck 110.

The feed arrow 112 is attached to a feed member endless chain 122 (an example of a feed member endless member) that supports the feed arrow 112 via a blade portion 112a. The feed member endless chain 122 rotates and moves in conjunction with the movement of the feed member endless chain 122 so as to reciprocate along the axial direction of the collet chuck 110. A pair of feed member interlocking sprockets 120 (feed member interlocking rotation). It is wrapped around an example of the body). One of the headstock 106 sides of the pair of feed member interlocking sprockets 120 is rotationally driven by the drive motor 116, and the drive motor 116 is controlled by the feed control unit 212. There is. As a result, the feed control unit 212 can control the movement of the feed arrow 112 via the drive motor 116. The feed control unit 212 may be composed of a part of the connection control unit 230, which will be described later.

On the other hand, the headstock 106 is also movable in the axial direction of the collet chuck 110 with respect to the reference coordinates. The headstock 106 extends in the axial direction of the collet chuck 110 via a rod member 126 extending in the axial direction of the collet chuck 110 and a connecting plate 138 extending in a plane perpendicular to the axial direction of the collet chuck 110. It is connected to a sliding portion 140 that slides on the linear guide 136.

Then, the connecting plate 138 is attached to the endless chain 150 for the headstock (an example of the endless member for the headstock). The pair of spindle interlocking sprockets 148 (spindle interlocking rotation) that the endless chain 150 for the headstock also rotates and moves in conjunction with the movement of the endless chain 150 for the headstock so as to reciprocate along the axial direction of the collet chuck 110. It is wrapped around an example of the body). Then, one of the headstock 106 side of the pair of feed member interlocking sprockets 120 is via an electromagnetic clutch 130 (an example of a clutch means), and the rotating shaft 152 of the drive motor 116 (and the feed member interlocking sprocket 120 on the headstock 106 side). )It is connected to the. The pair of feed member interlocking sprockets 120 and the pair of headstock interlocking sprockets 148 have the same diameter and are arranged in parallel with each other.

As a result, when the electromagnetic clutch 130 is in the connected state, the movement of the feed arrow 112 with respect to the reference coordinates and the movement of the spindle 106 with respect to the reference coordinates are integrally performed in the same direction by the same distance.

Further, when the end portion of the rod material is pushed by the feed arrow 112 and passes through the collet chuck 110 by a predetermined length (for example, receiving an output from a limit switch), the collet chuck 110 has an adjacent sleeve (not (Shown) is slid to reduce the diameter by a predetermined diameter. FIG. 2 is an enlarged view of the collet chuck 110.

Then, in the present embodiment, the connection / disconnection of the electromagnetic clutch 130 is controlled by the connection control unit 230. Specifically, the connection control unit 230 is prepared in advance with a control mode called a bar diameter confirmation mode, and in the bar diameter confirmation mode, the electromagnetic clutch 130 is immediately applied even if the collet chuck 110 is reduced in diameter. It is designed not to be connected.

Then, after the feed control unit 212 of the present embodiment interlocks with the control of the connection control unit 230 in the bar diameter confirmation mode and the collet chuck 110 is reduced in diameter, the connection control unit 230 causes the electromagnetic clutch 130. The drive motor 116 is driven in order to move the feed arrow 112 in the unconnected state.

Here, if the diameter of the bar is appropriate for the collet chuck 110, the bar is securely gripped by the reduced diameter of the collet chuck 110, and even if the drive motor 116 is driven, the feed arrow 112 Cannot move. On the contrary, if the diameter of the bar is smaller than the appropriate one corresponding to the collet chuck 110, the bar is not securely gripped even by the reduced diameter of the collet chuck 110, and the drive motor 116 is driven. And the feed arrow 112 moves. By discriminating the difference between these two states, the diameter of the bar can be confirmed inexpensively and accurately.

In the present embodiment, the encoder 116e is provided inside the drive motor 116 in order to determine the difference between the two states. By determining the output of the encoder 116e, whether or not the rotation shaft 152 of the drive motor 116 has rotated, that is, the feed member interlocking sprocket 120 connected to the rotation shaft 152 of the drive motor 116, and the endless chain 122 for the feed member. And whether or not the feed arrow 112 has moved can be determined inexpensively and accurately.

In addition to the headstock 106, the bar processing machine 104 includes a guide bush 111 (see FIG. 2) for further guiding the bar that has penetrated the collet chuck 110 of the headstock 106 and protrudes forward, and the bar. It is provided with a bite 108 for processing. The bite 108 is provided so as to be able to appear and disappear between a processing position near the peripheral surface of the bar and a retracted position, for example. The headstock 106 is provided with a rotatable spindle (not shown) inside, and a collet chuck 110 is attached to the tip of the spindle.

Next, the operation of the present embodiment will be described with reference to FIG.

Initially, the feed arrow 112 stands by at the rear end side of the bar material feeder 102, and the collet chuck 110 is in a state of being expanded in diameter.

When the new material is introduced by the bar feeder 102, the electromagnetic clutch 130 is released by the control of the connection control unit 230, that is, the connection between the headstock interlocking sprocket 148 and the rotating shaft 152 of the drive motor 116 is released. (Step S1). In this state, the drive motor 116 is started to be driven by the control of the feed control unit 212 (step S2). As a result, the feed arrow 112 starts moving via the feed member interlocking sprocket 120 and the endless chain 122 for the feed member (step S3).

When the end portion of the bar is pushed by the movement of the feed arrow 112 and passes through the collet chuck 110 by a predetermined length, the bar reaches a predetermined position (step S4). This state is detected by a limit sensor, an encoder, or the like (not shown), and based on the detection signal, the drive motor 116 is stopped (step S5) and the collet chuck 110 is reduced in diameter (step S6).

At this time, if the diameter of the bar is appropriate for the collet chuck 110, the bar is reliably gripped by the reduced diameter of the collet chuck 110. On the contrary, if the diameter of the bar is smaller than the appropriate one corresponding to the collet chuck 110, the bar cannot be reliably gripped even by the reduced diameter of the collet chuck 110.

The bar material feeder 102 of the present embodiment controls the bar material diameter confirmation mode at the time of the first supply of the bar material (step S7). That is, the feed control unit 212 acts to move the feed arrow 112, and determines whether or not the feed arrow 112 that receives the action actually moves. Specifically, the drive motor 116 is driven again (step S8), and whether or not the feed arrow 112 actually moves is determined based on the output of the encoder 116e inside the drive motor 116 (step S9). ).

If there is no change in the output of the encoder 116e, it can be determined that the bar is securely gripped by the collet chuck 110 and the feed arrow 112 and the bar cannot move. On the contrary, if there is a change in the output of the encoder 116e, it can be determined that the rod material is not securely gripped by the collet chuck 110 and the feed arrow 112 and the rod material can move.

In the former case, it means that an appropriate bar material is supplied, so the process proceeds to the bar material processing process. Specifically, the drive of the drive motor 116 is stopped again as necessary (step S10), and the electromagnetic clutch 130 is engaged by the control of the connection control unit 230, that is, the headstock interlocking sprocket 148 and the drive motor 116. The rotating shaft 152 is connected (step S11). As a result, even if the headstock 106 is subsequently moved by a drive system (not shown), the rod member 126, the connecting plate 138, the sliding member 140, the endless chain 150 for the headstock, the headstock interlocking sprocket 148, and the feed member interlocking sprocket. By integrally moving the 120 and the endless chain 122 for the feed member, the distance between the feed arrow 112 and the headstock 106 is maintained. As a result, the bar material can be appropriately processed by the bite 108 while the headstock 106 moves back and forth without the bar material coming out of the finger chuck 112b and without giving a load to the bar material (step S12). ).

In the latter case, it means that an appropriate bar material is not supplied, and therefore, an alarm is issued or the like to prompt the user to redo the supply of the bar material (step S13).

As described above, according to the bar material feeder 102 of the present embodiment, in the bar material diameter confirmation mode, the feed control unit is in a state where the collet chuck 110 is reduced in diameter and the electromagnetic clutch 130 is not connected. The diameter of the rod material is appropriate for the collet chuck 110 by acting to further move the feed arrow 112 and determining whether or not the feed arrow 112 that receives the action actually moves. It can be confirmed inexpensively and accurately.

Further, in the present embodiment, the feed arrow 112 is supported by the endless chain 122 for the feed member, and the feed member interlocking sprocket 120 rotates and moves in conjunction with the movement of the endless chain 122 for the feed member. On the other hand, the headstock 106 is connected to the headstock endless chain 150 via the rod member 126 and the connecting plate 138, so that the headstock interlocking sprocket 148 rotates in conjunction with the movement of the headstock endless chain 150. Since the electromagnetic clutch 130 detachably connects the feed member interlocking sprocket 120 and the spindle interlocking sprocket 148 via the rotating shaft 152 of the drive motor 116, each component is connected. It can be manufactured at low cost, and each component can be operated stably.

Further, in the present embodiment, the feed control unit 212 controls the movement of the feed arrow 112 via the motor 116 capable of driving the endless chain 120 for the feed member, and is inside the drive motor 116. By discriminating the output of the encoder 116e, it is possible to discriminate whether or not the bar material is properly gripped by the collet chuck 110. In this case, the discriminating unit can be manufactured at low cost, and the discriminating unit can be operated stably.

In the rod diameter confirmation mode, the discriminating unit determines whether or not the feed arrow 112, which receives the action of the feed control unit 212, actually moves by a predetermined length or more. It is preferable that the predetermined length can be arbitrarily set within the range of, for example, 1 mm to 200 mm.

The electromagnetic clutch 130 in the above embodiment can be replaced by a synchronization means that synchronizes the movement of the feed arrow 112 with the movement of the headstock 106. In that case, the connection control unit 230, as the synchronization control unit, is responsible for controlling the operation or interruption of the synchronization means. As the synchronization means, for example, a magnet scale can be adopted, or a higher-level control means that performs synchronization control between the movement amount of the feed arrow 112 and the movement amount of the headstock 106 can be adopted.

102 Bar material feeder 104 (spindle moving type) Bar material processing machine 106 Headstock 108 bytes 110 Collet chuck 112 Feed arrow (feed member)
112a Blade unit 112b Finger chuck 212 Feed control unit 116 Drive motor 120 Feed member interlocking sprocket 122 Endless chain for feed member 126 Rod member 130 Electromagnetic clutch 136 Linear guide 138 Connecting plate 140 Sliding member 148 Headstock interlocking sprocket 150 Endless for headstock Chain 152 Rotating shaft 230 Connection control unit

Claims (7)

It is a bar material feeder that supplies bar material to the collet chuck provided on the headstock.
A feed member that is provided so as to be movable in the axial direction of the collet chuck with respect to the reference coordinates and that pushes the end portion of the rod material to send the rod material so as to pass through the collet chuck.
A feed control unit that controls the movement of the feed member,
With
The headstock is also movable in the axial direction of the collet chuck with respect to the reference coordinates.
The diameter of the collet chuck is reduced when the end portion of the bar is pushed by the feed member and passes through the collet chuck by a predetermined length.
The bar material feeder is
With the movement of the feed member or the feed member with respect to the reference coordinates so that the movement of the feed member with respect to the reference coordinates and the movement of the headstock with respect to the reference coordinates are integrally performed in the same direction by the same distance. A clutch means that detachably connects the feed member interlocking member that moves with the headstock and the headstock interlocking member that moves with the movement of the headstock with respect to the headstock or the reference coordinates.
A connection control unit that controls the attachment / detachment of the clutch means, and
With more
In the bar diameter confirmation mode, the connection control unit does not connect the clutch means even if the collet chuck is reduced in diameter.
The connection control unit is adapted to connect the clutch means when the collet chuck is reduced in diameter unless the rod diameter confirmation mode is used.
The feed control unit acts to further move the feed member in the bar diameter confirmation mode after the collet chuck has been reduced in diameter and in a state where the connection control unit does not connect the clutch means. Is supposed to
A bar material feeder provided with a discriminating unit for determining whether or not the feed member that receives the action of the feed control unit in the bar diameter confirmation mode actually moves. The feed member interlocking member includes an endless member for a feed member that supports the feed member, and a feed member interlocking rotating body that rotates and moves in conjunction with the movement of the endless member for the feed member.
The headstock interlocking member includes an endless member for a headstock connected to the headstock and a headstock interlocking rotating body that rotates and moves in conjunction with the movement of the endless member for the headstock.
The rod material feeder according to claim 1, wherein the clutch means is configured to detachably connect the feed member interlocking rotating body and the headstock interlocking rotating body. The bar material feeder according to claim 2, wherein the feed control unit controls the movement of the feed member via a motor capable of driving the endless member for the feed member. The bar material feeder according to claim 3, wherein the discriminating unit has an encoder provided inside the motor. The discriminating unit determines whether or not the feed member that receives the action of the feed control unit actually moves by a predetermined length or more in the bar diameter confirmation mode.
The bar material feeder according to any one of claims 1 to 4, wherein the predetermined length can be arbitrarily set. The bar material feeder according to claim 5, wherein the predetermined length can be arbitrarily set within a range of 1 mm to 200 mm. It is a bar material feeder that supplies bar material to the collet chuck provided on the headstock.
A feed member that is provided so as to be movable in the axial direction of the collet chuck with respect to the reference coordinates and that pushes the end portion of the rod material to send the rod material so as to pass through the collet chuck.
A feed control unit that controls the movement of the feed member,
With
The headstock is also movable in the axial direction of the collet chuck with respect to the reference coordinates.
The diameter of the collet chuck is reduced when the end portion of the bar is pushed by the feed member and passes through the collet chuck by a predetermined length.
The bar material feeder is
The movement of the feed member and the movement of the headstock are synchronized so that the movement of the feed member with respect to the reference coordinates and the movement of the headstock with respect to the reference coordinates are integrally performed in the same direction and at the same distance. Synchronizing means and
A synchronization control unit that operates the synchronization means,
With more
In the bar diameter confirmation mode, the synchronization control unit does not operate the synchronization means even if the collet chuck is reduced in diameter.
The synchronous control unit is adapted to connect the clutch means when the collet chuck is reduced in diameter unless the bar diameter confirmation mode is used.
The feed control unit acts to further move the feed member in the bar diameter confirmation mode after the collet chuck has been reduced in diameter and the synchronization control unit has not operated the synchronization means. Is supposed to
The bar material feeder is provided with a discriminating unit for determining whether or not the feed member that receives the action of the feed control unit in the bar diameter confirmation mode actually moves.

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