JPH06226511A - Chuck device for crankshaft mirror - Google Patents

Abstract

PURPOSE:To substantially reduce a set-up time for improving productivity by selectively providing a fixed reference block and movable phase block according to the transfer reference surface of a workpiece on the front surface of a chuck body provided radially with a plurality of movable jaw bodies. CONSTITUTION:When a workpiece 2 having a phase reference surface 2a on the left side position is worked, a fixed reference block 5 and movable phase block 6 are mounted respectively on the left side of a chuck body 1 and a movable body 9 at the right side. When the workpiece 2 is sent between the respective chuck bodies 1, both ends of the workpiece 2 are clamped by respective jaw bodies 3 for working the workpiece 2 after the movable phase block 6 is moved leftward to press the phase reference surface 2a of the workpiece 2 against the fixed reference block 5 to determined the phase of the workpiece 2. On the other hand, left and right movable phase blocks 6 are mounted on the workpiece 2 for locating the centripetal phase to press these blocks 6 against the phase reference surface 2a of the workpiece 2 from the left and right directions for locating the workpiece 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crankshaft mirror chuck device capable of phase-positioning a work.

[0002]

2. Description of the Related Art Conventionally, a crankshaft used for an engine or the like is processed by using a crankshaft mirror. Further, when the crankshaft is machined by the crankshaft mirror, the pins and journals are machined in a state where the both ends of the workpiece are clamped by chucks after the workpiece has been phase-positioned. For this reason, the chuck is provided with means for performing phase positioning. FIG. 1A shows a chuck a.
A fixed reference block b is provided in a part of the above position, and the reference surface d formed on the work c is brought into contact with the reference block b to perform the phase positioning of the work c. The chuck a shown in FIG. 1B has a phase claw e on the left and right.
Are provided, and the phase positioning of the work c is performed by clamping the reference surface d of the work c from the left and right with the phase claws e.

[0003]

However, in a production line for producing a wide variety of products in a small amount as in recent years, since the shapes of the work c are various, the reference surface of the work c for phase positioning is also the work c. Since it depends on the type, in the chuck a provided with the conventional reference block b, all workpieces c
There is a problem that can not correspond to. Further, in the chuck a of the centripetal phase positioning method in which the work c is clamped by the plurality of phase claws e to perform the phase positioning, the reference plane d is provided on both sides of the work c.
Work is required, so the phase is positioned based on one side.
In the case where the two are mixed, it is necessary to previously provide the two reference surfaces d also on the one-side reference work c, and there is a problem that unnecessary machining is required. The present invention has been made to solve such a problem, and an object of the present invention is to provide a chuck device for a crankshaft mirror that can be used for both fixed reference type and centripetal positioning type works.

[0004]

In order to achieve the above object, the present invention provides a fixed reference according to a phase reference plane of a work on a front surface of a chuck body provided with a plurality of movable claws in a radial direction. The block and the movable phase block are selectively attached, and the movable phase block is movable in the contact and separation direction of the fixed reference block.

[0005]

[Operation] With the above configuration, even if the shape of the work is changed in various ways, such as a multi-product small-volume line, it is possible to easily deal with it by only a simple setup change.

[0006]

Embodiment An embodiment of the present invention will be described in detail with reference to the drawings shown in FIG. In FIG. 2, reference numeral 1 denotes a chuck body, which is attached so as to face a main shaft of a crankshaft mirror (not shown), and three claw bodies 3 for clamping both ends of a work 2 to be processed on the chuck body 1 are arranged in a radial direction. It is provided in. These claws 3 are movable in the radial direction by a wedge-shaped moving rod 3a that is moved in the axial direction of the main shaft by a clamp cylinder (not shown), and the work 2 is phase-positioned on the front surface of the chuck body 1. A phase positioning device 4 is provided for this purpose. The phase positioning device 4 is configured as follows so as to be compatible with various types of works 2.

3A and 3B, when viewed from the work 2 side, a fixed reference block 5 is provided on the left side and a movable phase block 6 is provided on the right side. Of the above blocks 5 and 6, the fixed reference block 5 is detachably attached to the front surface of the chuck body 1 by a fixing tool 8, and the movable phase block 6 is detachably attached to a moving body 9 by a fixing tool 10. ing. The movable body 9 is movable in a direction perpendicular to the center line of the claw body 3 provided between the fixed reference block 5 and the movable body 9 via a wedge-shaped actuating rod 12 by a phase clamp cylinder (not shown). The fixed reference block 5 is moved toward and away from the fixed reference block 5.

Further, (a) and (b) of FIG. 4 are phase positioning devices in which movable phase blocks 6 are provided on the left and right of the claw body 3, and (a) and (b) of FIG. 5 are movable phase blocks 6 on the left side. However, the fixed reference block 5 and the movable phase block 6 have the same structure as the phase positioning device 4 shown in FIGS. 3A and 3B. Has become.

To explain the operation, when the work 2 having the phase reference surface 2a on the left side of the work 2 is machined, it is fixed to the left side of the chuck body 1 as shown in FIGS. The reference block 5 and the movable phase block 6 are attached to the moving body 9 on the left side. And each chuck body 1
When the work 2 is carried in between, the movable phase block 6 is moved to the left and the phase reference surface 2a of the work 2 is pressed against the fixed reference block 5 to perform the phase positioning of the work 2, and then both ends of the work 2 are moved. It is used for processing the work 2 by clamping it with each claw body 3.

Further, as shown in FIGS. 4 (a) and 4 (b), movable phase blocks 6 are attached to the left and right sides of the work 2 on which the centripetal phase positioning is performed.
By pressing the phase reference surface 2a of the work 2 from the left and right to perform the phase positioning of the work 2
Both ends of are clamped and used for processing the workpiece 2. Further, for the work 2 having the phase reference surface 2a on the right side,
As shown in (a) and (b) of FIG. 5, the movable phase block 6 is attached to the left side and the fixed reference block 5 is attached to the right side, and the movable phase block 6 allows the reference surface 2 a of the workpiece 2 to be attached.
Is pressed against the fixed reference block 5 to perform phase positioning of the work 2. By changing the setup according to the form of the work 2, it is possible to deal with various forms of the work 2.

[0011]

As described in detail above, the present invention is capable of simply changing the positions of the fixed reference block and the movable phase block even when the shape of the work is variously changed, such as in a production line for high-mix low-volume production. Since it is possible, it is not necessary to replace the chuck each time. This can significantly reduce the setup time, improving productivity and
Since it suffices to prepare the fixed reference block and the movable phase block in advance, it can be implemented easily and inexpensively.

[Brief description of drawings]

1A and 1B are front views of a conventional chuck device.

FIG. 2 is a sectional view of a chuck device according to an embodiment of the present invention.

3A and 3B are a front view and a cross-sectional view of a chuck device with a left side fixed reference.

4A and 4B are a front view and a cross-sectional view of a chuck device when centripetal phase positioning is performed.

5A and 5B are a front view and a cross-sectional view of the chuck device when the right side fixed reference is used.

[Explanation of symbols]

1 ... Chuck body, 2 ... Work piece, 3 ... Claw body, 5 ... Fixed reference block, 6 ... Movable phase block.

Claims (1)

[Claims] 1. A fixed reference block 5 and a movable phase block 6 are selectively provided on a front surface of a chuck body 1 provided with a plurality of movable claw bodies 3 in a radial direction according to a phase reference surface 2a of a work 2. A chuck device in which the movable phase block 6 can be moved in the contacting / separating direction of the fixed reference block 5 while being attached.