JP2006123057A - Vice clamping device for automobile crankshaft - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automobile crankshaft machining device operating a pair of clamping devices almost simultaneously by a connecting rod. <P>SOLUTION: A vice clamping device 10 is provided with a body 12 and a base member 13a. The jig body 12 is provided with a cylinder mechanism 15. A support means 171a provided at a lower part 16a of the jig body 12 is provided with a support plate 2 mounted to one end of a guide shaft 20a and to one end of a connecting shaft 23a. The base member 13a is provided with a clamping means 30a for clamping a crankshaft 29. The clamping means 30a has a rack member 32a, a pinion 33a and a rack member 35a. Clamp claw mechanism 40a is provided with a lower claw 41a mounted to the support plate 21a, and an upper claw 42a mounted to the rack member 35a. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a front and rear surface processing apparatus for a crankshaft for an automobile, and more particularly to a vise clamp apparatus.

Conventionally, this type of crankshaft front and rear surface processing apparatus clamps two locations of the main journal portion of the crankshaft with a set of vise clamp devices when both ends of the crankshaft are processed (for example, Patent Document 1).
JP 2001-225233 A

The two vise clamp devices disclosed in Patent Document 1 perform clamping operations by driving independent actuators, but both speeds are different at the time of clamping, so that the workpiece is clamped in a tilted state. For this reason, when one side is clamped, it will be in a locked state and the other clamp location will be in the floating state.
Furthermore, since the upper and lower V-shaped bevels of the clamp part are fixed, the main journal part of the crankshaft does not come into contact with each of the upper and lower bevels if there is a slight processing error during manufacture. That is, it may be in a state of one piece.

Further, although the size of the support means for the crankshaft is not specifically described, it is considered that the support means is larger than the size in the axial direction of the workpiece according to the attached drawings. For this reason, when machining both ends, there is a possibility that the support means may interfere with the tool and the tool mounting tool, so that a long tool or a thin mounting tool is required to avoid interference, and there is a problem in the rigidity of the tool and the tool mounting tool. .
In particular, since the machining units are installed on the front side and the rear side, respectively, and the workpiece support means is on one side of the workpiece, and the machining units are located on both sides of the support means when viewed from the workpiece loading method. Will be big.
In order to solve the above-described problems, the present invention provides a connecting crank that is not restrained by a set of vise clamp devices so that the set of vise clamp devices can perform clamping substantially simultaneously. A shaft vise clamping device is provided.

In the invention according to claim 1, a machine tool that performs both end face machining using a horizontal three-axis column traverse machining center with a horizontal crankshaft for an automobile and an ATC attached thereto,
In a vise clamp device for an automobile crankshaft that clamps main journal portions at both ends of the crankshaft on a horizontal rotational drive shaft,
The jig body,
An actuator provided in the jig body;
Support means provided on the jig body and moving in the axial direction;
Clamping means moved by the actuator;
A clamp pawl mechanism provided on the support means and the clamp means for clamping the crankshaft;
The actuator and the clamping means are coupled by a coupling member, and the crankshaft is clamped by synchronizing the clamping claw mechanism by the operation of the actuator.
According to the present invention, a set of vice clamp devices can clamp a workpiece almost simultaneously by one actuator, so that there is no clamping mistake and the workpiece can be reliably clamped.
3. The invention according to claim 2, wherein the support means is a guide shaft member that is movably housed in a lower portion of the jig body, a support plate attached to one end of the guide shaft member, and the support plate is moved. By providing the guide mechanism for freely guiding, the sliding resistance of the support plate is reduced, which is preferable.
The invention according to claim 3 is suitable because the jig body has a substantially circular cross section so that the diameter can be made equal to or less than the total length of the workpiece, and the vice clamp device can be made more compact. is there.

  According to the present invention, a set of vice clamping devices can clamp a workpiece almost simultaneously, so that there is no clamping error. Furthermore, by making the size of the vice clamp device smaller than the workpiece, the degree of freedom in selecting the tool to be processed is increased, and it becomes possible to select a rigid tool or tool mounting tool, thereby improving the processing accuracy and processing efficiency. it can.

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a vise clamp device for clamping a workpiece, for example, a crankshaft. 2 is a cross-sectional view taken along line II-II in FIG. 1, FIG. 3 is a plan view of FIG. 1, and FIG. 4 is a schematic mechanism diagram of a vise clamp device.
In FIG. 1, a vise clamp device 10 includes a jig body 12 provided on a turnable turntable 11, a pair of base members 13 a and 13 b on upper portions 14 a and 14 b of the jig body 12, the base member 13 a and 13 is provided with a cylinder mechanism 15. The jig body 12 and the base members 13a and 13b are provided so as to be capable of turning together with the turning table 11. Furthermore, the shape of the jig body 12 is formed in a circular shape as shown in FIG. 3, so that interference with other related members can be avoided during turning.
The base members 13a and 13b are provided substantially in parallel with the upper portion of the jig body 12, as shown in FIGS. Since the base members 13a and 13b have the same structure, as shown in FIG. 2, only the configuration related to the base member 13a will be described below, and the configuration related to the base member 13b will be described with reference numerals. Is omitted.

The jig body 12 is formed in a substantially C-shaped cross section extending in the vertical direction (vertical direction in FIG. 1), and a normal cylinder mechanism (actuator) 15 is provided on the upper portion 14a (see FIG. 4).
A support means 17 a is provided on the lower portion 16 a of the jig body 12. The support means 17a is inserted into a hole 18a formed in the lower part 16a and is attached to the lower part 16a, and a guide shaft (guide) supported by the guide bearing 19a and built in the hole 18a. Shaft member) 20a and a substantially rectangular support plate 21a attached to one end of the guide shaft 20a. The support plate 21a is movably provided on a guide rail 22a provided on the jig body 12, is coaxial with the first rack member 31a, and has a bearing nut 26a on a connecting shaft 23a connected to the rack member 31a. Connected through. The connecting shaft 23a is connected to a bearing nut 24a guided by the guide rail 22a.

The base member 13a is provided with clamping means 30a for clamping a workpiece, for example, a crankshaft 29. The clamp means 30a is slidably fitted into the base member 13a and has a shaft-shaped first rack member 32a having a rack 31a, and a pinion rotatably provided on the base member 13a and meshing with the rack member 32a. 33a, and a shaft-like second rack member 35a having a rack 34a that is slidably fitted into the base member 13a and meshes with the pinion 33a substantially parallel to the rack member 32a.
A connecting rod 38 supported by the cylinder mechanism 15 is engaged with a notch 37a formed at one end of the rack member 31a (see FIGS. 1 and 2).

  In the cylinder mechanism 15, the piston rod 25 is connected to a connecting rod 38 by a pin 27, and engages with the first rack member 32 a via the connecting rod 38, and the first rack member 32 a, the pinion 33 a, and the second When the cylinder mechanism 15 is operated in the direction of arrow A, for example, the first rack member 32a is moved in the direction of arrow A, and the second rack member 35a is moved in the direction of arrow B. Moving. When the cylinder mechanism 15 is operated in the direction of arrow B, for example, the first rack member 32a moves in the direction of arrow B, and the second rack member 35a moves in the direction of arrow A. That is, the first rack member 32 a and the second rack member 35 a are moved in opposite directions by the operation of the cylinder mechanism 15. In this case, since the support plate 21a is integrated with the first rack member 32a via the connecting shaft 23a, the support plate 21a cooperates with the first rack member 32a. Further, the support plate 21a moves in the direction of the arrow A or B using the guide shaft 20a fitted in the bearing 19a as a guide.

  Reference numeral 40a denotes a clamp claw mechanism. The clamp claw mechanism 40a has a lower claw 41a having a V-shaped cross section attached to the support plate 21a, and a second claw arranged opposite to the lower claw 41a. And an upper claw 42a having a V-shaped cross section attached to one end of the rack member 35a.

  In the clamp claw mechanism 40a, the lower claw 41a and the upper claw 42a move integrally with the first rack member 32a and the second rack member 35a by the operation of the cylinder mechanism 15, so The claw 42a is moved in the arrow A or B direction by the rack member 32a, the pinion 33a, and the rack member 35a by the operation of the cylinder mechanism 15. That is, the lower claw 41 a and the upper claw 42 a move so as to approach or separate from each other by the operation of the cylinder mechanism 15.

The vise clamp device 10 according to the embodiment of the present invention is basically configured as described above. Next, the operation and effect thereof will be described.
First, the case where the crankshaft 29 which is a workpiece | work is clamped to the vise clamp apparatus 10 is demonstrated.
When the crankshaft 29 is clamped to the vise clamp device 10, it is carried into the vise clamp device 10 by means (not shown) such as a loader or manpower in a processing device (not shown) such as a machine tool. The crankshaft 29 carried into the vise clamp device 10 is placed in a temporary placement device (not shown). When the piston rod 25 is moved in the direction of the arrow A, for example, by the operation of the cylinder mechanism 15 in FIG. The rack members 32a and 32b, the pinions 33a and 33b, and the second rack members 35a and 35b move the clamp pawl mechanisms 40a and 40b toward each other by the connecting rod 38. As a result, the lower claws 41a and 41b and the upper claws 42a and 42b come close to each other and clamp the main journal portions 39a and 39b of the crankshaft 29.

  When the crankshaft 29 is unclamped from the vise clamp device 10, when the piston rod 25 is moved in the direction of the arrow B, for example, by the operation of the cylinder mechanism 15, the first rack members 32a and 32b, the pinions 33a and 33b, The second rack members 35a and 35b move the clamp pawl mechanisms 40a and 40b away from each other by the connecting rod 38. Accordingly, the lower claws 41a and 41b and the upper claws 42a and 42b are separated from each other, and the main journal portions 39a and 39b of the crankshaft 29 are released from the clamped state.

In the vise clamp device 10 according to the embodiment of the present invention, the cylinder mechanism 15 can be integrally operated by the connecting rod 38, and the pair of clamp means 30a and 30b are operated substantially simultaneously, so that the main shaft of the crankshaft 29 can be operated. Since the journal parts 39a and 39b are clamped simultaneously, a uniform clamping force can be applied to the main journal parts 39a and 39b.
In the vise clamp device 10 according to the present embodiment, the workpiece has been described with respect to the clamp of the crankshaft 29, but the present invention can naturally be applied to a clamp having a shape other than the crankshaft shape.

It is a front view which shows the outline of the vise clamp apparatus which concerns on embodiment of this invention. It is sectional drawing of the II-II line of FIG. It is a top view of FIG. It is a perspective view which shows the mechanism outline of the vise clamp apparatus of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Vise clamp apparatus 11 Turning table 12 Jig main body 13a, 13b Base member 15 Cylinder mechanism 17a, 17b Support means 21a, 21b Support plate 30a, 30b Clamp means 31a, 31b, 34a, 34b Rack 32a, 32b, 35a, 35b Rack member 39a, 39b Main journal part 40a, 40b Clamp claw mechanism 41a, 41b Lower claw 42a, 42b Upper claw

Claims (3)

A machine tool for horizontally processing a crankshaft for an automobile and performing both end face machining using a horizontal three-axis column traverse machining center with an ATC attached thereto,
In a vise clamp device for an automotive crankshaft that clamps main journal portions at both ends of the crankshaft on a horizontal rotational drive shaft,
The jig body,
An actuator provided in the jig body;
Support means provided on the jig body and moving in the axial direction;
Clamping means moved by the actuator;
A clamp pawl mechanism provided on the support means and the clamp means for clamping the crankshaft;
The vise clamp device is characterized in that the actuator and the clamp means are connected by a connecting member, and the crankshaft is clamped by synchronizing the clamp pawl mechanism by the operation of the actuator. The vice clamp device according to claim 1,
The support means includes a guide shaft member that is movably incorporated in a lower portion of the jig body, and
A support plate attached to one end of the guide shaft member;
A guide mechanism for movably guiding the support plate;
A vice clamp device comprising: The vise clamp device according to claim 1 or 2,
The jig body has a substantially circular shape in cross section.

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