JPH078128Y2 - Honing jig - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a honing jig for holding a workpiece in honing, and more specifically, it relates to a honing jig having a floating structure for holding a workpiece so that it can swing in three dimensions. It is about improvement.

[0002]

2. Description of the Related Art As a conventional honing jig of this type, there is one having a structure as shown in FIGS. 8 (a) and 8 (b) (see Japanese Utility Model Publication No. 55-41465).

This honing jig has an intermediate support a.
Is provided on the jig base b so as to be swingable (around the Y-Y axis) via the bearings c, c, and the swinging body d for clamping the workpiece W on the intermediate support a is an X-cross pin. It is provided so as to be swingable (around the XX axis) via e, whereby the swinging body d is swingable in the three-dimensional direction.

The oscillating body d is provided with an upper claw f, a lower claw g, and a drive means (not shown) such as hydraulic pressure for moving the lower claw g up and down. h is a loading arm for adjusting the position of the workpiece W, and i is a conveyor belt for transporting the workpiece W.

When the workpiece W is placed on the lower claw g and the positioning is performed by the loading arm h, the lower claw g rises and is placed between the upper claw f and the workpiece W. Is clamped, and the machining hole j of the clamped workpiece W is subjected to honing by the honing tool k.

[0006]

However, such a structure has the following problems, and an improvement thereof has been demanded.

(1) Since the driving means for the upper claw f and the lower claw g for chucking the workpiece W are hydraulic, etc., a hydraulic cylinder, hydraulic piping, etc. are required, the honing jig is large and complicated, and the weight is also large. It may be excessively large as compared with the object W, and this tendency is particularly remarkable in a small-sized workpiece. For this reason, the followability of the oscillating body d with respect to the honing tool is poor, and there is a problem that the machining accuracy is reduced.

(2) Since hydraulic piping is required, it is difficult to process the piping, such as making a rotary joint essential, and the driving means itself becomes complicated. Moreover, it cannot be used in a transfer-type honing machine or the like that transports a honing jig.

The present invention has been made in view of the above conventional problems, and it is small and lightweight, has a simple structure, can be used for a transfer type honing machine, etc., and can perform high-precision honing. The purpose is to provide a simple honing jig.

[0010]

In order to achieve the above object, the honing jig of the present invention is such that an oscillating body for holding a work piece in a replaceable manner is supported on a jig base so as to oscillate in three dimensions. The oscillating body includes a work holding unit that holds a workpiece, and a chuck mechanism that chucks the workpiece. The chuck mechanism includes a chuck body and a shutter.
The chuck body is provided on the swingable body so as to be able to move up and down, and is constantly elastically urged downward by an elastic member, and the shutter is provided at an upper end portion of the chuck main body and at a chuck position. It is movable in the horizontal direction between the loading / unloading position, and at the chuck position, the through hole for the honing tool of the shutter is vertically aligned with the machining hole of the workpiece held by the work holding part. In addition, at the carry-out position, the work carry-in / carry-out opening of the shutter is positioned corresponding to the workpiece held by the work holding unit.

[0011]

A chuck mechanism for a workpiece is provided with a chuck body and a shutter. The chuck body is provided on a rocking body so as to be able to move up and down, and is constantly urged downward by an elastic member such as a disc spring. The shutter is provided on the upper end of the chuck body and is movable in the horizontal direction between the chuck position and the loading / unloading position, thereby honing the chuck opening / closing device, the shutter opening / closing device, and the loading / unloading loader. As a device independent from the jig, the honing jig is made smaller and lighter.

That is, when loading and unloading a workpiece, first, a chuck opening / closing device, which is a unit different from the honing jig, pushes up the chuck body from below to release the clamped state of the workpiece by the shutter. Then, the shutter opening and closing device, which is also another unit, moves the shutter from the chuck position to the unloading position to position the work loading and unloading opening corresponding to the workpiece. The loading / unloading loader, which is a separate unit, performs the loading / unloading work of the workpiece.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

Embodiment 1 A honing jig according to the present invention is shown in FIGS.
The honing jig 1 includes a jig base 2 on which a rocking body 3 for holding a workpiece W in a replaceable manner is rockably supported.

That is, an annular intermediate ring 4 is swingably supported by the jig base 2 via an X-cross pin 5, and the swing body 3 is attached to the intermediate ring 4 by the X-cross pin. 5 is provided so as to be swingable through a Y-cross pin 6 that is orthogonal to 5. As a result, the oscillating body 3 shakes in the three-dimensional direction due to the movement of the X-cross pin 5 (rotation about the XX axis) and the movement of the Y-cross pin 6 (rotation about the YY axis). It is possible to move.

The X-cross pin 5 and the Y-cross pin 6 are also provided with radial bearings 7 and 8 which allow the axial movement of the jig base 2 and the intermediate ring 4.
Are supported by each. Thereby, the oscillating body 3
In addition to the above-described swing in the three-dimensional direction, is the axial direction of the X-cross pin 5 and the Y-cross pin 6, that is, X.
Horizontal movement is also possible in the −X axis direction and the YY axis direction. Further, by using the radial bearings 7 and 8 as described above, the movement of the oscillating body 3 becomes light, and good followability with respect to the honing tool is secured.

The radial bearings 7 and 8 are as follows.
In the illustrated example, a bush (including an oil-impregnated bearing or a Teflon coated bush) is used, but it is necessary to simply perform a hole finishing treatment after quenching to give the bearing hole the same function as the radial bearings 7 and 8 described above. Is also possible.

The swinging amount and the horizontal moving amount of the swinging body 3 are adjusted by adjusting screws 9 to 9 in consideration of usage conditions such as when the honing jig 1 is conveyed by an automatic machine and when the honing tool enters a machining hole. Adjusted by 12.

That is, the amount of movement of the intermediate ring 4 in the axial direction of the X-cross pin 5 is adjusted by moving the adjusting screws 9, 9 attached to the jig base 2 forward and backward.
The adjustment is performed by adjusting the clearance between the tips of the adjusting screws 9 and 9 and the outer peripheral surface of the intermediate ring 4.

The adjustment of the amount of movement of the rocking body 3 in the axial direction of the Y-cross pin 6 is performed by moving the adjusting screws 10 and 10 attached to the intermediate ring 4 forward and backward to adjust the tip of the adjusting screws 10 and 10. This is performed by adjusting the clearance with the outer peripheral surface of the rocking body 3.

The adjustment of the swinging amount of the intermediate ring 4 is performed by moving the adjusting screws 11 and 11 attached to the jig base 2 forward and backward, and a gap between the tips of these adjusting screws 11 and 11 and the lower surface of the intermediate ring 4 is adjusted. Is adjusted.

The swing amount of the swinging body 3 is adjusted by advancing and retracting the adjusting screws 12 and 12 attached to the jig base 2 so that the tips of these adjusting screws 12 and 12 and the chuck body 15 of the chuck mechanism 14 are moved. It is performed by adjusting the clearance with the outer peripheral surface. That is, since the chuck body 15 is fitted to the rocking body 3, as will be described later, the rocking amount of the rocking body 3 is adjusted by adjusting the rocking amount of the chuck body 15.

The oscillating body 3 is provided with a work holding part 13 for holding the work W and the chuck mechanism 14 for chucking the work W. The work holding portion 13 is in the form of a communication hole having a shape corresponding to the outer shape of the work W.

The chuck mechanism 14 includes the chuck body 15 described above.
And a shutter 16. The chuck body 15 has a cylindrical shape that covers the outer circumference of the rocking body 3, and is vertically movable along the outer peripheral surface of the rocking body 3. Also,
The chuck body 15 is always elastically urged downward by an elastic member 17. A disc spring is specifically used as the elastic member 17. Further, an adjusting member 18 for adjusting the elastic force of the disc spring 17 is provided.

Specifically, the adjusting member 18 is in the form of a chuck pressure adjusting nut screwed into the lower portion of the chuck body 15, and when the adjusting member 18 is vertically advanced and retracted,
The elastic force of the disc spring 17, that is, the strength of the chucking force of the chuck mechanism 14 is adjusted. Reference numeral 18a is a locking screw that releasably locks the rotation operation of the chuck pressure adjusting nut 18.

The chuck mechanism 14 is moved up and down by a chuck opening / closing device 30 (see FIG. 4) which is a unit different from the honing jig 1 as described later. The chuck opening / closing device 30 includes an opening / closing member 30 at the tip of a cylinder rod of a cylinder device 30a which is operated by hydraulic pressure or air pressure.
b is provided. The opening / closing member 30b includes a positioning pin 31 inserted into the lower end opening 3a of the rocking body 3,
A pressing portion 32 that comes into contact with the lower surface 15a of the chuck body 15 is integrally provided.

The shutter 16 is provided on the upper end of the chuck body 15. The shutter 16 is movable in the horizontal direction between the chuck position and the loading / unloading position,
This horizontal movement is performed by a shutter opening / closing device 35 (see FIG. 5) which is a unit different from the honing jig 1 as described later.
Done by. A pressing plate 22 holds the shutter 16 on the chuck body 15 so as to be horizontally movable.

The shutter opening / closing device 35 may be a single unit as shown in FIG. 5 (a) or a pair of two as shown in FIG. 5 (b). That is, the one shown in FIG. 5 (a) is a cylinder device 35a operated by hydraulic pressure or pneumatic pressure
An opening / closing member 35b is provided at the tip of the cylinder rod of
The shutter 1 is inserted into the engaging recess 36 of the opening / closing member 35b.
One of the engagement pins 16a of 6 is inserted and locked. The shutter 1 is reciprocated by the reciprocating motion of the opening / closing member 35b.
6 is horizontally moved between the chuck position and the loading / unloading position.

On the other hand, in the structure shown in FIG. 5 (b), cylinder devices 35c and 35d which are operated by hydraulic pressure or pneumatic pressure are provided at left and right positions facing each other in the drawing, and opening / closing members 35e and 35e are provided at the tips of these cylinder rods. Are provided respectively. Then, both opening / closing members 35e, 3
By the alternate projecting operation of 5e, the engagement pin 16a or 16b of the shutter 16 is pressed, and the shutter 16 is horizontally moved between the chuck position and the carry-in / out position.

Incidentally, the engagement pin 16b on the right side in the drawing
Also has a function as a balancing weight for balancing the honing jig 1, whereby the honing jig 1 is balanced in the horizontal direction and a high honing accuracy is ensured.

The shutter 16 is provided with an insertion hole 19 for a honing tool and a work loading / unloading opening 20, which are communicated with each other by a guide hole 21 extending in the moving direction of the shutter 16. The insertion hole 19 is located at the chuck position, and the workpiece W held by the work holding portion 13 is held.
Above and below the machining hole Wa, while the work loading / unloading opening 20 is positioned corresponding to the workpiece W in the unloading position.

Reference numeral 23 indicates a positioning mechanism for the shutter 16, and the positioning mechanism 23 is a steel ball 23a and a resilient spring 23b provided on the oscillating body 3 side.
And a V-groove-shaped chuck position recess 23c and a loading / unloading position recess 23d provided on the shutter 16 side.

In the honing machine equipped with the honing jig 1 constructed as described above, when the workpiece W is held by the oscillating body 3 of the honing jig 1 and clamped by the chuck mechanism 14, the drawing is shown. The honing tool that does not move descends from above and penetrates into the machined hole Wa of the workpiece W through the insertion hole 19 of the shutter 16.

This honing tool is rotated while repeatedly reciprocating in the vertical direction to precisely finish the inner diameter surface of the machined hole Wa. In this case, the workpiece W is in a floating state due to the swinging of the swinging body 3 in the three-dimensional direction, the followability with respect to the honing tool is kept good, and the desired machining accuracy is secured. That is, the workpiece W
Even if the outer diameter and the machining hole Wa are not accurately centered and parallel to each other, the movement of the oscillating body 3 in the three-dimensional direction absorbs these deviations and enables precise hole machining. Becomes

Further, since the machining torque by the honing tool is received by the X-cross pin 5 and the Y-cross pin 6, there is no escape of the workpiece due to the rotational force during machining,
Also in this respect, high processing accuracy is ensured.

When the honing process for the work W is completed, it is replaced with a new work W in the following manner. A. Workpiece unloading: The chuck opening / closing device 30 releases the clamped state of the work W by the chuck mechanism 14 (see FIG. 4).

That is, the cylinder rod of the cylinder device 30a projects upward, and the positioning pin 31 of the opening / closing member 30b projects into the lower end opening 3a of the rocking body 3 to position the rocking body 3 and then the pressing portion 32. It abuts the lower surface 15a of the chuck body 15 and presses the chuck body 15 upward. As a result, the chuck body 15 is pushed up against the elastic force of the disc spring 17, and the shutter 16 also rises at the same time to release the clamp on the workpiece W.

The workpiece W is chucked by a loading / unloading loader (not shown). That is, the loading / unloading loader, which is a unit different from the honing jig 1, descends from above and projects into the processing hole Wa of the workpiece W through the insertion hole 19 of the shutter 16. After that, the tip chuck claws of the loading / unloading loader are opened to chuck the workpiece W from the inside.

This operation can also be performed after the next step. The shutter 16 is moved from the chuck position to the loading / unloading position by the shutter opening / closing device 35 (see FIG. 5).

That is, the shutter opening / closing device 3 shown in FIG.
In the case of No. 5, the cylinder rod of the cylinder device 35a retracts to the left in the drawing, and the opening / closing member 35b pulls the shutter 16 to the left. Thereby, the shutter 1
6 moves from the chuck position to the carry-in / carry-out position, and the steel ball 23a is elastically locked in the carry-in / carry-out position recess 23d for positioning. In this state, the work loading / unloading opening 20 of the shutter 16 is positioned corresponding to the workpiece W.

As the shutter 16 moves,
The carry-in / carry-out loader holds the workpiece W while chucking the workpiece W, and then the work carry-in / carry-out opening 2 from the insertion hole 19 through the guide hole 21.
Moved to 0.

The work W is unloaded by the loading / unloading loader. That is, the carry-in / carry-out loader moves up while chucking the workpiece W, and the workpiece W is carried out upward from the work holding section 13 through the work carry-in / carry-out opening 20. Further, after the carry-in / carry-out loader is moved to a predetermined position, its front end chuck claw is contracted and closed to release the chuck of the workpiece W.

B. Carry-in of work: A new work W is carried in by the carry-in / carry-out loader. That is, the loading / unloading loader is the work W to be processed next.
While being chucked, the workpiece W is moved to the upper side of the honing jig 1 and then descended, and the workpiece W is loaded into the work holding portion 13 from above via the work loading / unloading opening 20.

The shutter opening / closing device 35 moves the shutter 16 from the loading / unloading position to the chuck position (see FIG. 5A).

That is, the cylinder rod of the cylinder device 35a projects to the right in the drawing, the opening / closing member 35b pushes the shutter 16 to the right, and the shutter 16 moves from the carry-in / out position to the chuck position and at the chuck position. The steel ball 23a is elastically locked in the recess 23c for positioning. In this state, the insertion hole 19 of the shutter 16 is positioned corresponding to the workpiece W.

As the shutter 16 moves,
The loading / unloading loader is configured such that the workpiece W is chucked through the guide hole 21 from the workpiece loading / unloading opening 20 through the insertion hole 19.
Moved to. That is, the closing operation of the shutter 16 is performed while the workpiece W is positioned at the desired position by the loading / unloading loader, and the setting error of the workpiece W is effectively prevented.

The tip chuck claws of the loading / unloading loader are contracted and closed, and the chuck of the workpiece W is released. Note that this operation can be performed after the next step.

The workpiece W is clamped by the chuck mechanism 14 by the chuck opening / closing device 30 (see FIG. 4). That is, the cylinder rod of the cylinder device 30a retracts downward to release the upward pressing state of the chuck body 15 by the pressing portion 32 of the opening / closing member 30b, and the positioning pin 31 also moves toward the lower end opening 3a of the rocking body 3. Exit downward from. As a result, the chuck body 15 is pushed down by the elastic force of the disc spring 17, and the shutter 16 clamps the workpiece W from above.

The loading / unloading loader rises to a predetermined position.

Example 2 This example is shown in FIGS. 6 (a) and 6 (b), the guide hole 21 in the shutter 16 of Example 1 is omitted, and the other structure is the same as that of Example 1.

As a result, since the honing tool insertion hole 19 of the shutter 16 and the work loading / unloading opening 20 are provided independently of each other, the tip chuck claws of the loading / unloading loader are inserted into the workpiece W. Since the shutter 16 cannot be opened and closed in this state, the work W replacement procedure is slightly different from that of the first embodiment as described below.

A. Workpiece unloading: The chuck opening / closing device 30 releases the clamped state of the work W by the chuck mechanism 14. The shutter opening / closing device 35 moves the shutter 16 from the chuck position to the loading / unloading position.

The workpiece W is chucked by the loading / unloading loader. The workpiece W is unloaded by the loading / unloading loader.

B. Carry-in of work: A new work W is carried in by the carry-in / carry-out loader. Workpiece W
Release the chuck. The loading / unloading loader rises to a predetermined position.

The shutter opening / closing device 35 moves the shutter 16 from the loading / unloading position to the chuck position. The chuck opening / closing device 30 clamps the workpiece W by the chuck mechanism 14.

The present invention is based on the first and second embodiments described above.
The present invention is not limited to the above, and various design changes can be made. For example, the shape and dimensions of the work holding portion 13 of the rocking body 3 and the shutter 16 of the chuck mechanism 14 are shown in FIGS. As shown respectively, the work W is variously deformed according to the shape and size of the work W to be processed.

[0057]

As described above in detail, according to the present invention,
Various excellent effects as described below can be obtained.

(1) The chuck mechanism of the workpiece has a chuck main body and a shutter, and the chuck main body is provided on the rocking body so as to be able to move up and down, and at the same time, is elastically urged downward by an elastic member such as a disc spring. The shutter is biased and is provided at the upper end of the chuck body, and is movable in the horizontal direction between the chuck position and the loading / unloading position, whereby the chuck opening / closing device, the shutter opening / closing device, and the loading / unloading loader. Since other devices such as the above have a separate and independent structure, a hydraulic cylinder, hydraulic piping, etc. are not required, and the honing jig can be made smaller and lighter and the structure can be simplified.

Therefore, for example, even in the case of a honing jig used for a small-sized work piece, the weight thereof does not become excessively large as compared with the work piece. Therefore, when honing a small-sized work piece, However, the followability of the oscillating body to the honing tool is good, and high processing accuracy can be secured. In addition, it is possible to automatically carry in and out the workpiece with respect to the honing jig.

(2) Since there is no hydraulic piping, there is no need for conventional piping processing, the driving means itself is simple, and a transfer-type honing machine of the type that conveys honing jigs, etc. Can also be used for

(3) Since the elastic member that gives the chucking force of the chuck mechanism is the disc spring, a driving means such as a hydraulic cylinder is not required, and from this point also, the honing jig can be made smaller and lighter.

(4) Adjustment of the axial movement amount of the X-cross pin of the intermediate ring, the axial movement amount of the Y-cross pin of the oscillating body, and the oscillating amount of the intermediate ring and the oscillating body are performed by the jig base. Since it can be easily done by adjusting screws attached to the etc., it is possible to set an amount suitable for the workpiece.

(5) Since the adjusting member for adjusting the elastic force of the elastic member is provided, the chuck pressure can be finely adjusted by this, and the chuck distortion is caused by the thickness and shape of the workpiece. However, the optimum chuck pressure for the workpiece can always be set.

[Brief description of drawings]

FIG. 1 is a front sectional view showing a honing jig which is an embodiment according to the present invention.

FIG. 2 is a side sectional view showing the honing jig.

FIG. 3 is a plan view showing the honing jig.

FIG. 4 is a side sectional view for explaining an opening / closing operation of a chuck mechanism of the honing jig.

FIG. 5 is a view for explaining the opening / closing operation of the shutter of the honing jig, and FIGS. 5 (a) and 5 (b) show different shutter opening / closing devices.

6A and 6B are views showing the structure of a shutter of a honing jig which is another embodiment of the present invention, FIG. 6A being a plan view and FIG. 6B being a front sectional view, respectively.

FIG. 7 shows a honing jig which is still another embodiment of the present invention, and FIGS. 7 (a) to 7 (d) respectively show the shape of the oscillator and the shutter corresponding to the shape of the workpiece. Shows the relationship.

FIG. 8 is a sectional view showing a conventional honing jig,
(A) is a sectional view in a plan view, and (b) is a sectional view in a front view.

[Explanation of symbols]

 1 Honing Jig 2 Jig Base 3 Oscillator 4 Intermediate Ring 5 X-Cross Pin 6 Y-Cross Pin 7,8 Radial Bearing 9-12 Adjusting Screw 13 Work Holding Part 14 Chuck Mechanism 15 Chuck Main Body 16 Shutter 18 Adjusting Member (Chuck Pressure) Adjustment nut) 19 Insertion hole for honing tool 20 Work loading / unloading opening 21 Guide hole 23 Positioning mechanism 30 Chuck opening / closing device 30 35 Shutter opening / closing device W Workpiece

Claims (5)

[Scope of utility model registration request] 1. A jig base supports an oscillating body for holding a work piece in a replaceable manner so as to oscillate in a three-dimensional direction. The chuck mechanism includes a chuck body and a shutter, and the chuck body is provided on the rocking body so as to be capable of moving up and down, and is constantly elastically downward by an elastic member. The shutter is provided in an upper portion of the chuck body and is movable in the horizontal direction between a chuck position and a loading / unloading position. At the chuck position, the shutter is inserted for a honing tool. The hole is vertically aligned with the machining hole of the workpiece held by the work holding portion, and the work loading / unloading opening of the shutter is located at the loading / unloading position. Honing jig characterized in that it is positioned to correspond to the workpiece held by the sandwiching member. 2. The jig base has an intermediate ring X-
The swing body is swingably provided via a cross pin and movable in the axial direction of the X-cross pin, and the swing body is swingable on the intermediate ring via a Y-cross pin orthogonal to the X-cross pin. And Y-
The honing jig according to claim 1, wherein the honing jig is provided so as to be movable in the axial direction of the cross pin. 3. The adjustment of the amount of movement of the intermediate ring in the axial direction of the X-cross pin is performed by advancing and retracting an adjusting screw attached to the jig base to adjust the clearance between the adjusting screw and the intermediate ring. The adjustment of the amount of movement of the rocking body in the axial direction of the Y-cross pin is performed by advancing and retracting the adjusting screw attached to the intermediate ring to adjust the clearance between the adjusting screw and the rocking body. The honing jig according to claim 2, which is performed by the following method. 4. The adjustment of the swing amounts of the intermediate ring and the oscillator is performed by adjusting the adjustment screws attached to the jig base and adjusting the clearances of the intermediate ring and the oscillator, respectively. The honing jig according to claim 2. 5. The X-cross pin and the Y-cross pin are axially supported by the jig base and the intermediate ring, respectively, via radial bearings that allow movement in the axial direction. Honing jig.