JP2009119575A - Center positioning apparatus of cylindrical member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To accurately position a center with no adjustment for positioning the center in a center positioning apparatus of a cylindrical member. <P>SOLUTION: A centering chuck 14 which is formed in a cylindrical form for retaining a first work 4 and a reference pin 13 of which the center is aligned with the one of the centering chuck are provided in a moving side unit 2. A holder member 22a divided into three in a circumference direction for retaining a cylindrical part 5a of a second work 5 and a compression coil spring 24 supporting the holder member 22a in the center direction are provided in a fixing side unit 3. A top end part 13a of the reference pin 13 is formed in a tapered form, and a fitting hole 22c in which the top end part 13a is fit is formed at the center of the three holder members 22a. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a cylindrical member center alignment apparatus used for aligning the centers of two cylindrical members having different diameters.

As a conventional apparatus for aligning the center of a cylindrical member, it is formed in a cylindrical shape that is inserted into the outer cylinder, an outer cylinder that is formed in a cylindrical shape, a receiving tray that is provided with a receiving tray recess for storing the outer cylinder. An inner diameter of the tray recess is formed larger than the outer diameter of the outer cylinder, and the outer cylinder is biased toward the center of the tray recess at an equal angle in the circumferential direction of the tray recess. There is one in which three springs are provided so that the center of the outer cylinder and the center of the tray recess are aligned (for example, see Patent Document 1).
JP-A-7-96425

  In the above-described conventional cylindrical member center alignment apparatus, the spring force of the three springs must be adjusted to be the same in order to match the center of the outer cylinder with the center of the dish recess. There is a problem that adjustment work is complicated and accurate center alignment is difficult.

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to perform center alignment of a cylindrical member that eliminates the need for adjustment of center alignment and enables accurate center alignment. The device is on offer.

  In order to achieve this object, the present invention is provided with a first workpiece having a cylindrical portion, and a reference pin that holds the first workpiece and is aligned with the cylindrical portion of the first workpiece. A moving member supported so as to be movable in the axial direction of the reference pin, a second workpiece having a cylindrical portion, and a work table provided with a holder for holding an inner peripheral portion of the cylindrical portion of the second workpiece. In the center alignment device of the cylindrical member that aligns the centers of the cylindrical portion of the first workpiece and the cylindrical portion of the second workpiece by moving the moving member in the workpiece base direction, the reference pin The tip is formed in a tapered shape, the holder is formed in a substantially cylindrical shape, divided into a plurality of parts in the circumferential direction, and these holders are supported so as to be movable in the radial direction. Biased in the central direction by means, in which the distal end portion of said reference pin is formed the engagement entry apertures for engaging enter the center of the holder.

  Moreover, this invention forms the said engagement hole in the said invention in the shape of a mortar which has the same inclination | tilt angle as the front-end | tip part of the said reference | standard pin.

  According to the present invention, the tip end portion of the reference pin is engaged with the engaging hole of the holder, and the holder moves outward in the radial direction of the engaging hole against the urging force of the urging means. By holding the workpiece, the first workpiece and the second workpiece are aligned with each other through the reference pin and the holder. Thus, by forming the tip of the reference pin in a tapered shape, the tip of the reference pin can be smoothly inserted into the insertion hole of the holder even if the centers of the first work and the second work are shifted. Can be enrolled in. In addition, the centers of the first workpiece and the second workpiece can be aligned by simply engaging the tip of the reference pin into the insertion hole of the holder. For this reason, unlike the prior art, it is not necessary to individually adjust the urging forces of the plurality of urging means, so that adjustment work for center alignment is not necessary and accurate center alignment is possible.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view of a cylindrical member center alignment apparatus according to the present invention, FIG. 2 is a plan view of the fixed unit, FIG. 3 is a sectional view taken along line III-III in FIG. 2, and FIG. IV-IV sectional view, FIG. 5 is a longitudinal sectional view showing a state in which the center alignment is performed by the center alignment apparatus for cylindrical members according to the present invention.

  A cylindrical member center alignment apparatus generally indicated by reference numeral 1 in FIG. 1 aligns the center of the first workpiece 4 with the moving unit 2 that holds the first workpiece 4 formed in a cylindrical shape. The stationary unit 3 holds the second work 5 formed in a substantially cylindrical shape.

  The moving unit 2 includes a pressing base 10 that moves up and down in the figure by an actuator (not shown), a pressing body 11 that is fixed to the pressing base 10 and is formed in a columnar shape, and a support cylinder 12 that is formed in a cylindrical shape. A reference pin 13 and a centering chuck 14 provided on the pressing body 11, a work presser 16 supported on the support 12 via a guide member 15 so as to be movable up and down in the figure, and a work presser 16 always downward. The gas spring 17 is energized.

  The tip portion 13a of the reference pin 13 is formed by a tapered truncated cone having an inclination angle α. As shown in FIG. 4, three centering chucks 14 are provided around the reference pin 13 at an equal angle. The three centering chucks 14 and the reference pin 13 are attached to the pressing body 11 in a state where the centers are aligned with each other in advance.

  In the moving side unit 2 configured in this way, the pressing base 10 is pressed downward with the first work 4 held by the centering chuck 14, and the lower end of the first work 4 is the flange of the second work 5. When it comes into contact with 5a, the lowering of the work presser 16 stops, the pressing base 10, the pressing body 11, and the support cylinder 12 descend against the urging force of the gas spring 17, and the tip 13a of the reference pin 13 will be described later. It engages in the engagement hole 22 c of the holder 22.

  As shown in FIGS. 2 and 3, the fixed side unit 3 includes a fixed base 20, three mounting bases 21 fixed on the fixed base 20 and mounting the flange 5 a of the second workpiece 5, A holder 22 composed of three holder members 22a for holding the inner peripheral portion of the work 5, three linear guide members 23 for supporting the holder member 22a on the fixed base 20 movably, and a biasing of the holder 22. And a compression coil spring 24.

  As shown in FIG. 2, the three mounting tables 21 are provided at equal angles in the circumferential direction in plan view. The holder 22 is formed in a substantially cylindrical shape, and is divided into three holder members 22a at equal angles in the circumferential direction. The holder member 22a has a lower end portion extending in the radial direction of the holder 22. The provided flange 22b is bent at a right angle. These flanges 22b are positioned between the above-mentioned three mounting bases 21 and are supported by the linear guide member 23 so as to be movable in the radial direction of the holder 22, and with the spring stoppers 25 standing on the fixed base 20. It is urged toward the center of the holder 22 by the elastic force of the compression coil spring 24 mounted between them.

  Since the three holder members 22a are urged toward the center of the holder 22, an engagement hole 22c is formed at a portion surrounded by the three holder members 22a. In this state, the second workpiece 5 is loosely inserted around the three holder members 22a, and the flange 5a of the second workpiece 5 is placed on the workpiece placing table 21 by being loosely inserted. In addition, an inclined surface 22d having the same angle α as the inclination angle of the tip portion 13a of the reference pin 13 is formed on the inner peripheral surface of the holder member 22a, and the upper portion of the engagement hole 22c of the holder 22 is a mortar. It is formed in a shape.

  Next, the center alignment method of the first workpiece 4 and the second workpiece 5 in the center alignment apparatus 1 for the cylindrical member configured as described above will be described. As shown in FIG. 1, the centering chuck 14 of the moving-side unit 2 is previously brought into pressure contact with the inner peripheral portion of the first work 4, and the first work 4 is held by the centering chuck 14. Similarly, the second work 5 is loosely inserted around the three holder members 22 a, and the flange 5 a of the second work 5 is placed on the work placement table 21 of the fixed side unit 3.

  In this state, the pressing base 10 of the moving unit 2 is pressed downward by an actuator (not shown) to lower the moving unit 2 so that the tip 13a of the reference pin 13 faces the second work 5. At the same time, the lower end of the first workpiece 4 is brought into contact with the flange 5 a of the second workpiece 5. Further, by lowering the moving unit 2, the lowering of the work presser 16 is stopped as shown in FIG. 5, and the pressing table 10, the pressing body 11, and the support cylinder 12 are lowered against the urging force of the gas spring 17. Then, the tip end portion 13 a of the reference pin 13 is engaged with the engagement hole 22 c of the holder 22.

  In this state, the tip portion 13a of the reference pin 13 is engaged with the inclined surfaces 22d of the three holder members 22a, and the three holder members 22a are compressed by the wedge action between the tip portion 13a and the inclined surfaces 22d. The coil spring 24 moves in a direction away from the engagement hole 22 c against the elastic force of the coil spring 24. In this state, the center position of the first workpiece 4 and the holder 23 is aligned via the reference pin 13. Therefore, when the holder member 22 a is pressed against the inner peripheral portion of the second workpiece 5 and the second workpiece 5 is held by the holder 22, the first workpiece 4 and the second workpiece 5 are connected to the reference pin 13 and the holder 23. The mutual center alignment is performed via the.

  Thus, even if the center of the 1st work 4 and the 2nd work 5 has shifted mutually by having formed tip part 13a of reference pin 13 in the taper shape, tip part 13a of this reference pin 13 is changed. It is possible to smoothly engage with the engaging hole 22c of the holder 22. Further, the center of the first work 4 and the second work 5 can be aligned by merely engaging the tip 13 a of the reference pin 13 into the engagement hole 22 c of the holder 22. For this reason, it is not necessary to individually adjust the biasing force of the holder as in the prior art, so that adjustment work for center alignment becomes unnecessary and accurate center alignment becomes possible.

  In addition, since the inclination angle of the tip portion 13a of the reference pin 13 and the inclination angle of the inclined surface 22d of the holder member 22a engaged therewith are formed at the same angle α, the tip portion 13a of the reference pin 13 and The center alignment with the holder 22 is accurately performed. For this reason, the center position alignment of the first workpiece 4 and the second workpiece 5 is accurately performed in a more stable state.

It is a longitudinal cross-sectional view of the center alignment apparatus of the cylindrical member which concerns on this invention. In the center alignment apparatus of the cylindrical member which concerns on this invention, it is a top view of a stationary-side unit. It is the III-III sectional view taken on the line in FIG. It is the IV-IV sectional view taken on the line in FIG. It is a longitudinal cross-sectional view which shows the state which is aligning with the center alignment apparatus of the cylindrical member which concerns on this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Cylindrical member center alignment apparatus, 2 ... Movement side unit, 3 ... Fixed side unit, 4 ... 1st workpiece | work, 5 ... 2nd workpiece | work, 13 ... Reference | standard pin, 13a ... Tip part, 14 ... Centering chuck, 22 ... Holder, 22a ... Holder member, 22c ... Engagement hole, 22d ... Inclined surface, 24 ... Compression coil spring.

Claims (2)

A first workpiece having a cylindrical portion and a reference pin that holds the first workpiece and is aligned with the cylindrical portion of the first workpiece are provided and supported so as to be movable in the axial direction of the reference pin. And a work table provided with a holder for holding the inner periphery of the cylindrical part of the second work, and the moving member is moved in the direction of the work table. In the center alignment device of the cylindrical member that aligns the centers of the cylindrical portion of the first workpiece and the cylindrical portion of the second workpiece,
The tip of the reference pin is formed in a tapered shape, the holder is formed in a substantially cylindrical shape, divided into a plurality of parts in the circumferential direction, and the plurality of holders are supported so as to be movable in the radial direction. An apparatus for center alignment of a cylindrical member, wherein the holder is urged in a central direction by an urging means, and an engaging hole into which the tip end portion of the reference pin is engaged is formed at the center of the holder.   The center alignment apparatus for a cylindrical member according to claim 1, wherein the engaging hole is formed in a mortar shape having the same inclination angle as the tip end portion of the reference pin.

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