JP2013208690A - Chuck device and cutting apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chuck device and a cutting apparatus, capable of cutting an end of a workpiece.SOLUTION: A first chuck device 51 includes: a tri-claw 53 mounted to a body 51 and movable along a radial direction q with an axis P as the center thereof; and a pair of phase claws 54 mounted to the body 51 and movable along an axial direction p parallel to the axis P.

Description

  The present invention relates to a chuck device and a cutting device including a pair of phase claws.

  2. Description of the Related Art Conventionally, as a device for cutting a rod-shaped workpiece (for example, a crankshaft material), a cutting device including a pair of chuck devices for gripping the workpiece has been widely used.

  Further, a chuck device having a fixed phase claw and a movable phase claw movable with respect to the fixed phase claw has been proposed so that the phase can be determined regardless of the shape of the phase reference surface formed on the workpiece. (See Patent Document 1).

JP-A-6-226511

  However, in the chuck device described in Patent Document 1, the workpiece is cut in a state where the fixed phase claw and the movable phase claw are in contact with the end portion of the workpiece on which the phase reference surface is formed. Therefore, there exists a problem that the edge part of a workpiece | work cannot be cut.

  The present invention has been made in view of the above-described situation, and an object thereof is to provide a chuck device and a cutting device capable of cutting an end portion of a workpiece.

  The chuck device according to the first aspect is a chuck device for gripping a workpiece disposed along a predetermined axis. The chuck device is attached to the main body, a plurality of chuck claws that are movable along a radial direction around a predetermined axis, and is attached to the main body along an axial direction parallel to the predetermined axis. And a pair of movable phase claws.

  According to the chuck device according to the first aspect, when the workpiece is cut by the turning tool, the pair of phase claws can be moved backward to the main body side. Therefore, the end portion of the workpiece can be cut.

  The chuck device according to the second aspect relates to the first aspect, and when viewed from the axial direction, the pair of phase claws are disposed inside the outer periphery of the main body.

  According to the chuck device according to the second aspect, the chuck device can be made compact compared to the case where the pair of phase claws are arranged outside the main body.

  The chuck device according to a third aspect relates to the first or second aspect, and when viewed from the radial direction, the distal ends of the pair of phase claws in the axial direction are more main bodies than the distal ends of the plurality of chuck claws in the axial direction. Close to.

  According to the chuck device according to the third aspect, the chuck device can be made compact compared to the case where the tips of the pair of phase claws protrude forward from the tips of the plurality of chuck claws.

  A chuck device according to a fourth aspect relates to any one of the first to third aspects, and includes a pair of rods inserted through the main body and disposed along the axial direction. When viewed from the axial direction, the pair of rods can rotate reversely with respect to each axis. The pair of phase claws are supported at the tips of the pair of rods.

  According to the chuck device of the fourth aspect, it is possible to determine the phase of the workpiece by sandwiching the phase reference from both sides of the phase reference with the pair of phase claws. Accordingly, since the phase reference can be centered smoothly, the workpiece can be phased with high accuracy.

  A cutting device according to a fifth aspect includes the chuck device according to the first aspect, a work head that supports the chuck device, and a cutting tool for cutting the work.

  The cutting device according to a sixth aspect relates to the fifth aspect, and the chuck device is fixed to the work head.

  According to the cutting device according to the sixth aspect, the configuration inside the work head can be simplified as compared with the case where the chuck device rotates.

  As described above, according to the present invention, it is possible to provide a chuck device and a cutting device capable of cutting an end portion of a workpiece.

Side view of crankshaft mirror 1 Side view showing the structure of the crankshaft material The perspective view which shows the structure of a 1st work head and a 1st chuck | zipper apparatus. Plan view of the first chuck device viewed from the axial direction Side view of the first chuck device seen from the radial direction Rear perspective view of the first work head and the first chuck device Flow chart for explaining the operation of the crankshaft mirror

[Overall configuration of crankshaft mirror 1]
The overall configuration of the crankshaft mirror 1 will be described with reference to the drawings. FIG. 1 is a side view showing a configuration of a crankshaft mirror 1 (an example of a cutting device). FIG. 2 is a side view showing a configuration of the crankshaft material W (an example of a rod-shaped workpiece).

  The crankshaft mirror 1 is an internal mirror for producing a crankshaft by turning a crankshaft material W.

  The crankshaft material W is formed in a rod shape by forging, and has a larger outer shape than the crankshaft in consideration of a turning allowance. As shown in FIG. 2, the crankshaft material W has a bent axis. The crankshaft material W includes first to fifth main journals J1 to J5, first to fourth pin journals P1 to P4, first to eighth crank arms A1 to A8, a rear flange 210, and a front shaft 220. The fourth pin journal P4 is a portion that is used as a phase reference for the crankshaft material W. As will be described later, when the fourth pin journal P4 is sandwiched between a pair of phase claws 54 (see FIG. 3), the phase of the crankshaft material W is determined. The rear flange 210 has a first end face 210S and a first center hole 210CH formed in the first end face 210S. The front shaft 220 has a second end face 220S and a second center hole 220CH formed in the second end face 220S.

  As shown in FIG. 1, the crankshaft mirror 1 includes a pedestal 10, first and second turning tools 20, 21, a first work head 30, a second work head 40, a first chuck device 50, and a second chuck device 60. Is provided.

  The pedestal 10 supports the first and second turning tools 20 and 21, the first work head 30, and the second work head 40.

  Each of the first and second turning tools 20 and 21 is a jig for cutting the crankshaft material W. Each of the first and second turning tools 20 and 21 is movable in an axial direction p parallel to the axis P (an example of a predetermined axis) and a radial direction q perpendicular to the axial direction p. The first and second turning tools 20 and 21 respectively cut the crankshaft material W by rotating the outer periphery of the crankshaft material W fixed by the first and second chuck devices 50 and 60.

  The first work head 30 includes a first fixing portion 31 and a first mechanism housing portion 32. The first fixing portion 31 is fixed on the base 10. The first mechanism accommodating portion 32 is disposed on the first fixing portion 31 and accommodates each mechanism for driving the first chuck device 50. The internal configuration of the first mechanism housing part 32 will be described later.

  The second work head 40 is disposed so as to face the first work head 30. The second work head 40 includes a movable part 41 and a mechanism housing part 42. The movable portion 41 is disposed on the base 10 and is movable in the axial direction p. The mechanism accommodating portion 42 is disposed on the movable portion 41 and accommodates each mechanism for driving the second chuck device 60.

  The first chuck device 50 is attached to the tip of the first mechanism housing portion 32 of the first work head 30. The first chuck device 50 holds one end of the crankshaft material W. Further, the first chuck device 50 determines the phase of the crankshaft material W. The configuration of the first chuck device 50 will be described later.

  The second chuck device 60 is disposed so as to face the first chuck device 50. The second chuck device 60 is attached to the tip of the mechanism accommodating portion 42 of the second work head 40. The second chuck device 60 grips the other end portion of the crankshaft material W.

[Configuration of the first work head 30 and the first chuck device 50]
FIG. 3 is a perspective view showing the configuration of the first work head 30 and the first chuck device 50. FIG. 4 is a plan view of the first chuck device 50 viewed from the axial direction p. FIG. 5 is a side view of the first chuck device 50 viewed from the radial direction q. FIG. 6 is a rear perspective view of the first work head 30 and the first chuck device 50. In the following, the second work head 40 side of the first work head 30 is referred to as “front”, and the opposite side of the first work head 30 from the second work head 40 is referred to as “rear”.

  As shown in FIG. 3, the first chuck device 50 includes a main body 51, a center 52, three claws 53 (an example of a plurality of chuck claws), and a pair of phase claws 54 (first phase claws 54a and second phase claws). A claw 54b) and a pair of rods 55 (including a first rod 55a and a second rod 55b).

  As shown in FIG. 3, the main body 51 is fixed to the front end of the first mechanism housing portion 32 of the first work head 30. The main body 51 is formed in a cylindrical shape. The main body 51 has a facing surface 51 </ b> S that faces the second chuck device 60. The facing surface 51S faces the first end surface 210S (see FIG. 2) of the rear flange 210 when the crankshaft material W is gripped by the first chuck device 50.

  As shown in FIGS. 3 and 4, the center 52 is erected at the center of the opposing surface 51 </ b> S of the main body 51. The center 52 is attached to the main body 51 so as to be movable along the axis P. Centering of the crankshaft material W is performed by inserting the center 52 into a first center hole 210CH (see FIG. 2) formed in the first end face 210S of the rear flange 210.

  As shown in FIGS. 3 and 4, the three claws 53 are arranged on the facing surface 51 </ b> S of the main body 51 at substantially equal intervals along the circumferential direction r centering on the axis P. The three claws 53 are attached to the main body 51 so as to be movable along the radial direction q. When the three claws 53 are brought into contact with the outer periphery of the rear flange 210, the crankshaft material W is firmly gripped.

  As shown in FIG. 4, the pair of phase claws 54 are disposed inside the outer periphery of the main body 51 on the facing surface 51 </ b> S of the main body 51. The pair of phase claws 54 are disposed at point symmetrical positions with respect to the center 52. The pair of phase claws 54 are fixed to the tips of the pair of rods 55. As shown in FIG. 5, in the axial direction p, the distance L1 between the tip of the pair of phase claws 54 and the main body 51 is smaller than the distance L2 between the tip of the three claws 53 and the main body 51. That is, the tips of the pair of phase claws 54 are closer to the main body 51 than the tips of the three claws 53.

  The pair of phase claws 54 can move with the pair of rods 55 and can rotate with the pair of rods 55. Specifically, as shown in FIG. 4, the first phase claw 54a is fixed to the tip of the first rod 55a, moves together with the first rod 55a that moves along the first axis AXa, It rotates with the first rod 55a that rotates about the axis AXa. Further, as shown in FIG. 4, the second phase claw 54b is fixed to the tip of the second rod 55b and moves together with the second rod 55b moving along the second axis AXb. It rotates with the second rod 55b rotating around AXb.

  Here, the pair of rods 55 rotate counterclockwise around the respective axis. Specifically, when the first rod 55a rotates about the first axis AXa toward the first rotation direction s1, the second rod 55b moves toward the second rotation direction t1 about the second axis AXb. Rotate. As described above, when the first rod 55a and the second rod 55b rotate inward, the fourth pin journal P4 is sandwiched between the first rod 55a and the second rod 55, and the phase determination of the crankshaft material W is performed. . On the other hand, when the first rod 55a rotates about the first axis AXa toward the third rotation direction s2, the second rod 55b moves toward the fourth rotation direction t2 about the second axis AXb. Rotate. As described above, when the first rod 55a and the second rod 55b rotate outward, the phase determination of the fourth pin journal P4 is released.

  Moreover, the 1st mechanism accommodating part 32 of the 1st work head 30 accommodates the rotation mechanism 100 and the moving mechanism 200, as shown in FIG.

  The rotation mechanism 100 includes first and second spline shafts 101a and 101b, first and second gears 102a and 102b, and first and second cylinders 103a and 103b. The rear end of the first rod 55a is connected to the front end of the first spline shaft 101a, and the rear end of the second rod 55b is connected to the front end of the second spline shaft 101b. A first spline shaft 101a is inserted through the first cylinder 103a, and a second spline shaft 101b is inserted through the second cylinder 103b. The first gear 102a and the second gear 102b are meshed with each other. The first cylinder 103a is connected to the first gear 102a via a cam follower (not shown), and the second cylinder 103b is connected to the first gear 102a via a cam follower (not shown).

  When hydraulic oil is supplied to the first cylinder 103a, the first gear 102a and the second gear 102b rotate in opposite directions, and the first spline shaft 101a and the second spline shaft 101b rotate in opposite directions. As a result, the pair of phase claws 54 rotate outward. On the other hand, when hydraulic fluid is supplied to the second cylinder 103b, the first spline shaft 101a and the second spline shaft 101b rotate in opposite directions by rotating the first gear 102a and the second gear 102b in opposite directions. To do. As a result, the pair of phase claws 54 rotate inward.

  The moving mechanism 200 includes a connecting part 201 and a cylinder 202. The connecting portion 201 supports the rear ends of the first and second spline shafts 101a and 101b. The cylinder 202 drives the connecting portion 201 in parallel with the axial direction p. Thus, the first phase claw 54a and the second phase claw 54b are moved along the axial direction p together with the first rod 55a and the second rod 55b.

[Configuration of the second work head 40 and the second chuck device 60]
In the present embodiment, the second chuck device 60 has the same configuration as the first chuck device 50 except that the pair of phase claws 54 and the pair of rods 55 are not provided. The second work head 40 has the same configuration as the first work head 30 except that it does not house the rotation mechanism 100 and the movement mechanism 200. Therefore, the description of the configuration of the second work head 40 and the second chuck device 60 is omitted.

[Operation of crankshaft mirror 1]
Next, the operation of the crankshaft mirror 1 will be described with reference to FIG. FIG. 7 is a flowchart for explaining the operation of the crankshaft mirror 1.

  First, in step S1, the center (not shown) of the second chuck device 60 is inserted into the second center hole 220CH formed in the front shaft 220 of the crankshaft material W.

  Next, in step S2, the center 52 of the first chuck device 50 is inserted into the first center hole 210CH (see FIG. 2) formed in the rear flange 210 of the crankshaft material W.

  Next, in step S <b> 3, hydraulic oil is supplied to the cylinder 102 of the moving mechanism 100 to advance the pair of phase claws 54 of the first chuck device 50 toward the second chuck device 60 side. As a result, the pair of phase claws 54 are moved to the side of the fourth pin journal P4.

  Next, in step S4, by supplying hydraulic oil to the second cylinder 103b of the rotation mechanism 100, the pair of phase claws 54 are rotated inward. Thus, the phase of the crankshaft material W is determined by bringing the pair of phase claws 54 into contact with both sides of the fourth pin journal P4.

  Next, in step S5, the rear flange 210 of the crankshaft material W is gripped by the three claws (not shown) of the second chuck device 60.

  Next, in step S <b> 6, the front shaft 220 of the crankshaft material W is gripped by the three claws 53 of the first chuck device 50.

  Next, in step S <b> 7, the pair of phase claws 54 are rotated outward by supplying hydraulic oil to the first cylinder 103 a of the rotation mechanism 100. Accordingly, the phase determination of the crankshaft material W is released by separating the pair of phase claws 54 from the fourth pin journal P4.

  Next, in step S <b> 8, the pair of phase claws 54 of the first chuck device 50 are moved backward by collecting the hydraulic oil from the cylinder 102 of the moving mechanism 100. As a result, the pair of phase claws 54 are retracted toward the main body 51 side.

  Next, in step S <b> 9, the crankshaft material W is cut by the first and second turning tools 20 and 21.

[Action and effect]
(1) In the crankshaft mirror 1, the pair of phase claws 54 are attached to the main body 51 and are movable along an axial direction p parallel to the axis P.

  Therefore, when the crankshaft material W is cut by the first and second turning tools 20 and 21, the pair of phase claws 54 can be retracted toward the main body 51 side. Therefore, the crankshaft material W can be cut between the fourth pin journal P4 that is the phase reference and the rear flange 210 that is the gripping portion, that is, the end of the crankshaft material W.

  (2) When viewed from the axial direction p, the pair of phase claws 54 are disposed inside the outer periphery of the main body 51.

  Therefore, the first chuck device 50 can be made compact compared to the case where the pair of phase claws 54 are arranged outside the main body 51.

  (3) When viewed from the radial direction q, the tips of the pair of phase claws 54 are closer to the main body 51 than the tips of the three claws 53.

  Therefore, the first chuck device 50 can be made compact compared to the case where the tips of the pair of phase claws 54 protrude forward from the tips of the three claws 53.

  (4) The pair of rods 55 that support the pair of phase claws 54 can be rotated in the reverse direction with respect to each axis.

  Therefore, the crankshaft material W can be phased by being sandwiched by the pair of phase claws 54 from both sides of the fourth pin journal P4. Accordingly, since the fourth pin journal P4 can be centered smoothly, the crankshaft material W can be phased with high accuracy.

  (5) The first chuck device 50 is fixed to the first work head 30.

  Therefore, unlike the case where the first chuck device 50 rotates, it is not necessary to rotate the rotating mechanism 100 or the moving mechanism 200, so that the configuration inside the first work head 30 can be simplified.

[Other Embodiments]
The present invention is not limited to the above-described embodiments, and various changes or modifications can be made without departing from the scope of the present invention.

  (A) In the above embodiment, the first chuck device 30 is fixed to the first work head 30, but the present invention is not limited to this. The first chuck device 30 may be rotatable about the axis P with respect to the first work head 30. In this case, the rotating mechanism 100 and the moving mechanism 200 may be rotated inside the first work head 30 together with the first chuck device 30.

  (B) In the above embodiment, the crankshaft material W has been described as an example of a rod-shaped workpiece. However, the present invention is not limited to this. The rod-shaped workpiece may be any material that needs to be phased.

  (C) In the above embodiment, the first chuck device 50 has the three claws 53 as an example of the plurality of chuck claws, but is not limited thereto. The first chuck device 50 may have two or four or more chuck claws.

  (D) In the above-described embodiment, the pair of phase claws 54 reversely rotate to determine the phase of the crankshaft material W and cancel the phase, but the present invention is not limited to this. For example, only the second phase claw 54b may be configured to be rotatable with respect to the first phase claw 54a, or the tip of the first phase claw 54a is configured to be extendable and retractable toward the second phase claw 54b. Also good. Even in these cases, the end portion of the crankshaft material W can be cut by allowing the pair of phase claws 54 to move along the axial direction p.

DESCRIPTION OF SYMBOLS 1 Crankshaft mirror 10 Base 20, 21 Turning tool 30 1st work head 31 1st fixing | fixed part 32 1st mechanism accommodating part 40 2nd work head 41 2nd fixing | fixed part 42 2nd mechanism accommodating part 50 1st chuck | zipper apparatus 51 Main body 52 Center 53 Three claws 54 A pair of phase claws (first phase claws 54a and second phase claws 54b)
55 A pair of rods (first rod 55a and second rod 55b)
60 Second chuck device 100 Rotating mechanisms 101a, 101b First and second spline shafts 102a, 102b First and second gears 103a, 103b First and second cylinders 200 Moving mechanism 201 Connecting portion 202 Cylinder P4 Fourth pin journal

Claims (6)

A chuck device for gripping a workpiece arranged along a predetermined axis,
The body,
A plurality of chuck claws attached to the main body and movable along a radial direction about the predetermined axis;
A pair of phase claws attached to the main body and movable along an axial direction parallel to the predetermined axis;
A chuck device comprising: When viewed from the axial direction, the pair of phase claws are disposed inside the outer periphery of the main body,
The chuck device according to claim 1. When viewed from the radial direction, tips of the pair of phase claws in the axial direction are closer to the main body than tips of the plurality of chuck claws in the axial direction.
The chuck device according to claim 1 or 2. A pair of rods inserted through the body and disposed along the axial direction;
The pair of rods, when viewed from the axial direction, can rotate in reverse from each other about their respective axis centers;
The pair of phase claws are supported at the tips of the pair of rods,
The chuck device according to claim 1. A chuck device according to claim 1;
A work head for supporting the chuck device;
A cutting tool for cutting the workpiece;
A cutting apparatus comprising: The chuck device is fixed to the work head.
The cutting device according to claim 5.

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