JPH0413046Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a workpiece holding device that fixes and drives a workpiece that is an assembled part in an assembly processing machine such as a lathe.

[Conventional technology]

Normally, in turning processing using a lathe, a chuck is attached to the rotating main shaft of the lathe, a workpiece is held on the chuck, and the turning processing is performed by rotating the workpiece together with the main shaft. Therefore, it is a condition that the shape of the workpiece can be held in the chuck, and as a result, when making one assembly, each part is held in a lathe and turned, and after the turning is completed, Currently, each part is assembled sequentially to form an assembly.

[The problem that the idea aims to solve]

In recent years, computer-related equipment, OA equipment, VTR
Components used in such applications are required to be small and highly accurate. However, when manufacturing and assembling these parts, each part is individually machined, ie, turned, and then assembled. Even if processed at the level of
Since the processing error appears as a cumulative error,
When assembling parts as a final product, it is often seen that the accumulation of machining accuracy of each part results in errors that exceed the allowable error, and this poses a problem as the requirement for high rotational accuracy cannot be satisfied. As a countermeasure to prevent such defects, it is possible to perform final finishing processing on the assembled parts (final product state) to increase processing accuracy.
In order to do so, the shape of the assembled state must be such that it can be chucked by a machine tool such as a lathe, which limits the degree of freedom in design, which poses a problem.

The purpose of this invention is to solve the above-mentioned problems, and it is possible to hold a rotatable workpiece with assembled parts on an assembly machine such as a lathe, thereby making it possible to It is possible to have a large degree of freedom in the shape of the assembled workpiece, and further improve the machining accuracy of the assembly as a final product.In particular, the workpiece installation operation can be performed reliably and easily, and To provide a workpiece holding device for an assembled processing machine such as a lathe, which can avoid the risk of damaging the workpiece due to collision between the workpiece and a locking piece at a position other than the hole formed in the outer member of the workpiece. That's true.

[Means to solve the problem]

In order to achieve the above object, this invention is constructed as follows. That is, this invention provides a workpiece comprising an outer member to be cut and a shaft member rotatable relative to the outer member, the workpiece having a chuck claw that grips one outer peripheral end of the shaft member. 1 holding member, a longitudinal reference member that is replaceably attached to the first holding member and that the end face of the shaft member comes into contact with to form a longitudinal processing reference plane for cutting, the other outer periphery of the shaft member. a second holding member that grips an end portion and is movable forward and backward relative to the first holding member; a second holding member that is rotatably provided to the second holding member via a bearing and that is attached to the outside of the workpiece; a driving means for imparting rotational motion to the member; a connecting means rotatably driven by the driving means and capable of moving forward and backward with respect to the workpiece; a plate and a burr connected to the burr plate and having a locking piece that can be engaged with a hole formed in an end surface of the outer member; and the burr plate is pushed toward the workpiece by pressing against the burr plate. The present invention relates to a workpiece holding device comprising a roller operated by a manual handle that prevents the cutting plate from moving forward and allows the cutting plate to move forward toward the workpiece by releasing the pressure against the cutting plate.

Further, in this workpiece holding device, the second
The holding member is a center biased toward the first holding member and supports one end of the workpiece.

Further, in this workpiece holding device, the biasing force of the center against the shaft member of the workpiece is
It is adjusted by changing the spring force using an adjustment screw.

[Effect]

The workpiece holding device according to this invention is constructed as described above and operates as follows. That is,
This workpiece holding device holds a workpiece consisting of an outer member to be cut and a shaft member rotatable relative to the outer member, and moves the first holding member in the axial direction. A second holding member is fixed such that the shaft member of the workpiece is not moved, and the first holding member holds one outer circumferential end of the shaft member of the workpiece, and the second holding member is moved back.
The holding member is moved closer to the first holding member, and the second holding member holds the other end of the shaft member of the workpiece. Next, the outer member of the workpiece is rotated to position the outer member and the connecting means connected to the driving means, and then the connecting means is brought closer to the outer member to connect the two. With the above configuration, the rotation of the drive means can be transmitted to the outer member via the connection means.

As described above, after the shaft member of the workpiece is held by the first holding member and the second holding member, the manual handle is operated to release the pressure of the roller against the burr plate, thereby removing the burr plate. The plate is advanced toward the workpiece, and a locking piece provided with a recess is engaged with a hole formed in the end surface of the outer member.

Next, the shaft member of the workpiece is held by the first holding member and the second holding member, and cutting is performed while rotating the outer member by the driving means, so that the shaft member of the workpiece is cut. It becomes possible to have a considerable degree of freedom in the shape of the
The outer member can be cut with high precision in the assembled state, and the processing accuracy of the assembly as a final product of the workpiece can be extremely improved, and the reliability of the product can be improved.

〔Example〕

Hereinafter, an embodiment of the workpiece holding device for a set processing machine such as a lathe according to this invention will be described in detail with reference to the drawings.

In FIG. 1, a workpiece holding device according to the invention is generally shown. This workpiece holding device includes an outer member 12 to be cut and the outer member 1
It holds a workpiece 1 consisting of a shaft member 11 that is rotatable relative to a shaft member 2, and mainly includes:
A first holding member 2 and a second holding member 3 that clamp both ends of the shaft member 11 of the workpiece 1, a driving means 4 that rotationally drives the outer member 12 of the workpiece 1, and the driving means 4 and the outer member 12. It has a connecting means 5 for connecting. Regarding the workpiece 1, an outer member 12 is rotatably attached to a shaft member 11 via a bearing 13.

The first holding member 2 is a precision chuck 22 having a chuck claw 21 for clamping and holding one end of the shaft member 11 of the workpiece 1, and is attached to the chuck frame 6. The lower surface of the chuck frame 6 is, for example, fixed to a slide table (not shown), and the slide table is configured to be slidable in the axial direction. The precision chuck 22 has a chuck pawl 21 formed to match the shape of the gripping portion of the workpiece 1 and a longitudinal reference member 23 serving as a machining reference point B, each of which is replaceably assembled. .

The second holding member 3 is a center 31 that is biased toward the first holding member 2 and is capable of holding the workpiece 1 by inserting the other end of the shaft member 11 into the conical hole 38. and is replaceably attached to the end of the sleeve 32.

The sleeve 32 is inserted into the sleeve boss 33 so as to be slidable in the axial direction. A center pressing spring 34 is inserted into the sleeve boss 33 while being supported by an adjustment screw 35, and the spring 34 urges the center 31 toward the first holding member 2 via the sleeve 32. ing.

The adjustment screw 35 is screwed into a lid 36 fixed to the end surface of the sleeve boss 33, and is configured to be adjustable from the outside with a driver or the like. The sleeve boss 33 is inserted into the main body 37 and fixed at the end surface of the main body 37.

As described above, the assembly assembled into the main body 37 is assembled to the workpiece 1 side of the main body frame 7 so as to coincide with the rotation center C, and forms an integral unit.

The drive means 4 for rotationally driving the outer member 2 includes a pulley 41 rotatably incorporated on the main body 37 via a bearing 42, a pulley boss 43 attached to the pulley 41, and a pulley boss 43 attached to one end surface of the pulley boss 43. A pulley 41 is rotationally driven by a belt 45.

Furthermore, regarding the connecting means 5 that connects the outer member 12 and the driving means 4, a plate 51 that is movable in the axial direction with respect to the driving means 4 is fitted into a hole 14 formed in the end surface of the outer member 12. Suru Kere 5
2, and a coupling 53 that connects the kerf plate 51 and the kerf 52.

A burr operation spring 54 is built into the hollow portion of the spacer 44, and the burr plate 51 is inserted so as to be slidable in the axial direction. A plurality of guide pins 55 are attached to the spacer 44 concentrically with respect to the center of rotation for the purpose of guiding the sliding plate 51 and transmitting rotational force.

On the inner side of the end surface of the workpiece 1 side of the plate 51,
A coupling ring 53 is fitted in a replaceable manner, and one surface of the coupling ring 53 on the workpiece 1 side is provided with the workpiece 1.
A plurality of holes 14 formed in the end surface of the outer member 12 of
Part 52 with a plurality of locking pieces 56 that match the
is replaceably fitted on the outside.

The coupling ring 53 is provided to prevent the vibration generated when the drive means 4 of the workpiece holding device rotates from being transmitted to the workpiece 1, and has the function of transmitting only the rotational torque necessary for cutting. . Therefore, the vibration is caused by the outer member 12 of the workpiece 1.
Therefore, the machining accuracy of the workpiece 1 will not be adversely affected.

On the other hand, an arm 8 extending toward the workpiece 1 is attached to the upper surface of the main body frame 7, and a manual handle 81 is attached to the tip of the arm 8. A roller 83 is rotatably attached to the tip of the manual handle 81 so as to be able to slide the cut plate 51 over a distance L via a lever 82. The lower surface of the main body frame 7 is, for example, fixed to a slide table (not shown) different from the slide table to which the chuck frame 6 is fixed, and is slidable in the axial direction of the slide table. be.

Next, the operation of the workpiece holding device according to this invention will be explained. When attaching the workpiece 1 to the workpiece holding device in a machining machine such as a lathe, first fix the slide table to which the chuck frame 6 is attached in a stationary state relative to the machine body, and then set the reference point for machining. B, and move the slide table to which the main body frame 7 is attached in the direction opposite to the workpiece 1, that is, to the left in FIG. While pressing the end of the shaft member 11 of the workpiece 1 against the longitudinal reference member 23 of the precision chuck 22, the shaft member 11 is lightly clamped. Clamping is performed by power or manual operation.

Next, the main body frame 7, which had been retreating, is moved forward to a predetermined position prepared in advance by power operation. Here, the predetermined position refers to the center pressing spring 34 where the center 31 of the main body 37 is in contact with the shaft member 11 of the workpiece 1 and is acting on the sleeve 32.
This is the position where it shrinks slightly. As a condition for moving the main body frame 7 forward, the burr 52 must be moved backward. When the manual handle 81 is operated so as to press the roller 83 acting on the side surface of the glazing plate 51 against the glazing plate 51, the glazing plate 5
1 retreats along a guide pin 55 provided on the spacer 44. Coupling 53 assembled to the cover plate 51 as the cover plate 51 retreats
Since the burrs 52 also move backward, when the main body frame 7 moves forward, the burrs 52 touch the outer member 12 of the workpiece 1.
Since it does not come into contact with the end surface, the end surface will not be damaged by the chipping 52.

A limit switch (not shown) is provided at the attachment portion of the manual handle 81, and an interlock circuit is built into the control device so that the main body frame 7 will not move forward unless the cut 52 is moved backward. The center 31 attached to the main body 37 comes into contact with the shaft member 11 of the workpiece 1, and the center pressing spring 34 is compressed, so that the workpiece 1 reliably comes into contact with all the machining standards.

When the workpiece 1 is fixed between the center 31 and the chuck pawl 21, the workpiece 1 is slightly rotated in order to engage the hole 14 provided in the workpiece 1 with the locking piece 56 of the cutout 52. When the phase of the hole 14 and the locking piece 56 of the five burrs match, the manual handle 81 is operated in the direction in which the roller 83 is removed from the burlap plate 51. When the roller 83 is removed, the burr plate 51 moves forward along the guide pin 55 (the position shown in the figure) by the force of the burr actuating spring 54 built into the spacer 44, and the locking piece 56 of the burr 52 is removed from the machine. It is inserted into the hole 14 provided in the object 1.

After the workpiece 1 has been set on the workpiece holding device in the manner described above, an electric motor (not shown) attached to the main body frame 7 applies rotational torque necessary for turning. Rotating torque is belt 4
5 to the pulley 41, and further to the pulley boss 4.
3. Spacer 44, guide pin 55 provided on spacer 44, cut plate 51, coupling 5
3. Then, it is transmitted sequentially to the chipping 52, and the workpiece 1
imparts a rotational motion to the outer member 12 of. When the workpiece 1 rotates, the tool rest (not shown) moves according to the command value of the NC device (not shown), and the outer member 12 of the workpiece 1 is moved by the cutter 9 attached to the tool rest. The outer surface A of is turned.

[Effect of idea]

The workpiece holding device according to this invention is constructed as described above and has the following effects. That is, this workpiece holding device holds a shaft member of a workpiece of an assembly component having a rotation function with a first holding member and a second holding member, and connects a connecting means connected to a driving means to the outside of the workpiece. Since the shaft member is coupled to the outer member and the outer member is rotated by the driving means, the workpiece with the shaft member and the outer member assembled can be set in an assembly machine such as a lathe. This makes it possible to cut the outer member of the workpiece in the assembled state, and prevents an increase in cumulative errors caused by assembling each part.
It becomes possible to perform precision finishing, and it is also possible to improve the runout accuracy of the rotating body, that is, the outer member, with respect to the rotation axis. Therefore, the outer member, that is, the outer rotating body, can be cut with extremely high precision.

In particular, when connecting the connecting means to the outer member of the workpiece held by the first holding member and the second holding member, the The forward movement toward the outer member is regulated by a roller, and after positioning the locking piece of the burr connected to the burr plate and the hole formed in the outer member, the restriction of the roller against the burr plate is released. The locking plate is then advanced toward the outer member to bring them closer together, and the locking piece is engaged with the hole, so that the locking piece and the hole are reliably and easily engaged,
The risk of damage to the workpiece due to a collision between the two outside the predetermined position can be avoided.

Furthermore, in the past, for VTR parts and other parts that have a rotating function, the bearing housing was fixed and the shaft system was driven, so it was necessary that the shape be able to be chucked by machine tools such as lathes. However, with this workpiece holding device, the shaft system is fixed and the housing system, that is, the outer member, can be driven and machined, so there is considerable freedom in designing the shape of the workpiece. It becomes possible to have

Furthermore, since both outer circumferential ends of the shaft member of the workpiece are held by the first holding member and the second holding member, which are movable forward and backward relative to each other, the work of attaching and detaching the workpiece is greatly simplified. This can be done easily and reliably.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the workpiece holding device according to this invention. DESCRIPTION OF SYMBOLS 1... Workpiece, 2... First holding member, 3... Second holding member, 4... Drive means, 5... Connection means,
DESCRIPTION OF SYMBOLS 11...Shaft member, 12...Outer member, 14...Conical hole, 21...Chuck pawl, 22...Precision chuck, 31...Center, 42...Bearing, 51...
Ceramic plate, 52... Ceramic, 53... Coupling, 56... Locking piece.

Claims (1)

[Claims for Utility Model Registration] (1) Gripping one outer peripheral end of the shaft member of a workpiece consisting of an outer member to be cut and a shaft member rotatable relative to the outer member. a first holding member having a chuck claw; a longitudinal reference member that is replaceably attached to the first holding member and in which the end face of the shaft member abuts to form a longitudinal processing reference plane for cutting; the shaft; a second holding member that grips the other outer peripheral end of the member and is movable forward and backward relative to the first holding member; a second holding member that is rotatably provided to the second holding member via a bearing; a driving means for imparting rotational motion to the outer member of the workpiece; a connecting means rotatably driven by the driving means and capable of moving forward and backward with respect to the workpiece; the connecting means is movable in an axial direction with respect to the driving means; The burr plate includes a burr plate that is removably provided, and a burr that is connected to the burr plate and has a locking piece that can be engaged with a hole formed in an end surface of the outer member; A workpiece comprising: a roller operated by a manual handle that prevents the burr plate from advancing toward the workpiece and releases the pressure against the burr plate, thereby allowing the burr plate to advance toward the workpiece. Object holding device. (2) The workpiece holding device according to claim 1, wherein the second holding member is a center biased toward the first holding member. (3) The workpiece according to claim 2, wherein the biasing force of the center against the shaft member of the workpiece is adjusted by changing the spring force using an adjustment screw. holding device.