JPH0615959U - Honing jig - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a honing jig that is small and lightweight, has a simple structure, can be used for transfer type honing machines, and can perform high-precision honing. [Structure] A chuck mechanism 14 for a workpiece W includes a chuck body 15 and a shutter 16. The chuck body 15 is provided on the oscillating body 3 so as to be able to move up and down, and the disc spring 1
It is always urged downward by 7. Shutter 16
Is provided on the upper end of the chuck body 15 and is movable in the horizontal direction between the chuck position and the carry-in / out position. By making the chuck opening / closing device, the shutter opening / closing device, the loading / unloading loader, and the like separate from the honing jig 1, the honing jig can be made smaller and lighter.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a honing jig that holds a workpiece during honing, and more particularly to an improvement of a honing jig that has a floating structure that holds a workpiece so that it can swing in three dimensions.

[0002]

[Prior art]

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

In this honing jig, an intermediate support a is provided on a jig base b so as to be swingable (around the Y-Y axis) via bearings c, c, and a workpiece is attached to the intermediate support a. An oscillating body d that clamps W is provided oscillatably (around the XX axis) via an X-cross pin e, which allows the oscillating body d to oscillate in three-dimensional directions. There is.

Further, the rocking 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 up and down the lower claw g. h is a loading arm for adjusting the position of the workpiece W, and i is a conveyor belt for transporting the workpiece W.

Then, 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 positioned between the upper claw f and the workpiece W. And the machining hole j of the clamped workpiece W is subjected to honing by the honing tool k.

[0006]

[Problems to be solved by the device]

 However, such a structure has the following problems, and its improvement 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, and the honing jig is large and complicated, and the weight is also large. It may become 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 lowered.

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

The present invention has been made in view of the above conventional problems, and it is small and lightweight, has a simple structure, and can be used for a transfer type honing machine and the like, and also enables highly accurate honing. The purpose is to provide a simple honing jig.

[0010]

[Means for Solving the Problems]

 In order to achieve the above object, the honing jig of the present invention comprises a jig base, on which a swingable body for holding a work piece in a replaceable manner is swingably supported in a three-dimensional direction. And a chuck mechanism for chucking a workpiece. The chuck mechanism includes a chuck body and a shutter, and the chuck body is provided on the swingable body so as to be vertically movable. The shutter is provided on the upper end portion of the chuck body and is movable horizontally in a horizontal direction between the chuck position and the carry-in / out position. In addition, the insertion hole for the honing tool of the shutter is vertically aligned with the machining hole of the workpiece held by the work holding unit, and at the unloading position, Workpiece carry-in-and-out opening of the serial shutter is characterized in that it is positioned to correspond to the workpiece held by the workpiece holding portion.

[0011]

[Action]

 The workpiece chuck mechanism includes a chuck main body and a shutter.The chuck main body is mounted on the oscillator so that it can move up and down, and is constantly elastically urged downward by elastic members such as disc springs. The shutter is provided on the upper end of the chuck body and can be moved horizontally between the chuck position and the loading / unloading position. This allows the chuck opening / closing device, the shutter opening / closing device, and the loading / unloading loader to be honinged. As a device independent of the tool, the honing jig is made smaller and lighter.

That is, when loading / 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 / closing device, which is also another unit, moves the shutter from the chuck position to the carry-out position to position the work carry-in / carry-out opening corresponding to the workpiece. The loading / unloading loader, which is a separate unit from the tool, performs loading / unloading work.

[0013]

【Example】

 Hereinafter, embodiments according to the present invention will be described with reference to the drawings.

Embodiment 1 A honing jig according to the present invention is shown in FIG. 1 to FIG. Be supported as much as possible.

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 X-cross pin by the intermediate ring 4. It is provided so as to be swingable via a Y-cross pin 6 which is orthogonal to 5. As a result, the oscillating body 3 swings in the three-dimensional direction by 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.

Further, the X-cross pin 5 and the Y-cross pin 6 are respectively connected to the jig base 2 and the intermediate ring 4 via radial bearings 7 and 8 which allow the axial movement thereof. It is pivotally supported. As a result, in addition to the swing in the three-dimensional direction described above, the swing body 3 also moves in the axial direction of the X-cross pin 5 and the Y-cross pin 6, that is, in the X-X axis direction and the Y-Y axis direction. It is possible to move horizontally. Further, by using the radial bearings 7 and 8 as described above, the movement of the oscillating body 3 is lightened, and good followability to the honing tool is secured.

As the radial bearings 7 and 8, bushes (including oil-impregnated bearings or Teflon coating bushes) are used in the illustrated example, but the bearings are simply subjected to hole finishing treatment after quenching. It is possible to add the same function to the radial bearings 7 and 8 to the holes.

In addition, the swing amount and the horizontal movement amount of the swing body 3 are adjusted by adjusting screws 9 to 9 in consideration of use 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 and 9 attached to the jig base 2 forward and backward to adjust the adjusting screw 9. , 9 and the outer peripheral surface of the intermediate ring 4 are adjusted for clearance.

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 back and forth to adjust the tip of the adjusting screws 10 1 and 10 2. This is performed by adjusting the clearance with the outer peripheral surface of the rocking body 3.

The adjustment of the swing 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 to adjust the tip of the adjusting screws 11 and 11 and the lower surface of the intermediate ring 4. It is done by adjusting the gap.

The adjustment of the amount of rocking of the rocking member 3 is performed by moving the adjusting screws 12, 12 attached to the jig base 2 forward and backward, and the tip ends of these adjusting screws 12, 12 and the chuck body 15 of the chuck mechanism 14. This is done by adjusting the clearance with the outer peripheral surface of the. That is, since the chuck body 15 is fitted to the rocking body 3 as 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 includes a work holding portion 13 that holds the workpiece W, and the chuck mechanism 14 that chucks the workpiece 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 and the 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. The chuck body 15 is constantly elastically urged downward by an elastic member 17. As the elastic member 17, specifically, a disc spring is used. Further, an adjusting member 18 for adjusting the elastic force of the disc spring 17 is provided.

The adjusting member 18 is specifically in the form of a chuck pressure adjusting nut screwed into the lower portion of the chuck body 15, and by moving the adjusting member 18 up and down in the vertical direction, the elastic force of the pan panel 17 is adjusted. The force, that is, the strength of the chucking force of the chucking mechanism 14, is adjusted. Reference numeral 18a is a lock screw for releasably locking 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 is provided with an opening / closing member 30b at the tip of a cylinder rod of a cylinder device 30a which is operated by hydraulic pressure or air pressure. The opening / closing member 30b is integrally provided with a positioning pin 31 which is inserted into the lower end opening 3a of the rocking body 3 and a pressing portion 32 which comes into contact with the lower surface 15a of the chuck body 15.

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 carry-in / out position, and this horizontal movement is performed by a shutter opening / closing device 35 (Fig. 5)). 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, in FIG. 5 (a), the opening / closing member 35b is provided at the tip of the cylinder rod of the cylinder device 35a which is operated by hydraulic pressure or air pressure, and the engagement concave portion 36 of this opening / closing member 35b is provided with the shutter 16 described above. One of the engaging pins 16a is inserted and locked. The shutter 16 is horizontally moved between the chuck position and the loading / unloading position by the reciprocating motion of the opening / closing member 35b.

On the other hand, in the structure shown in FIG. 5B, cylinder devices 35c and 35d operated by hydraulic pressure or pneumatic pressure are provided so as to face each other in the left and right positions in the drawing, and opening / closing members 35e and 35e are provided at the tips of these cylinder rods. Are provided respectively. Then, by alternately projecting the opening / closing members 35e, 35e, the engaging pin 16a or 16b of the shutter 16 is pressed to move the shutter 16 horizontally between the chuck position and the loading / unloading position. It

Note that 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 horizontal balancing of the honing jig 1 is achieved. As a result, 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. In the chuck position, the insertion hole 19 is vertically aligned with the processing hole Wa of the workpiece W held by the workpiece holding portion 13, while the workpiece loading / unloading opening 20 is located at the loading / unloading position. It is located corresponding to the object W.

Reference numeral 23 denotes a positioning mechanism for the shutter 16. The positioning mechanism 23 is provided on the side of the rocking body 3 and includes a locking portion composed of a steel ball 23a and an elastic spring 23b, and the shutter 16. It is composed of a V-groove-shaped chuck position recess 23c and a loading / unloading position recess 23d provided on the side.

Then, in the honing machine equipped with the honing jig 1 configured as described above, when the workpiece W is held by the rocking body 3 of the honing jig 1 and clamped by the chuck mechanism 14. A honing tool (not shown) descends from above and penetrates into the machined hole Wa of the workpiece W through the insertion hole 19 of the shutter 16.

The honing tool is rotated while repeating the reciprocating motion in the vertical direction to precisely finish the inner diameter surface of the processing hole Wa. In this case, the work W is in a floating state due to the rocking of the rocking body 3 in the three-dimensional direction, the followability to the honing tool is kept good, and the desired machining accuracy is secured. In other words, even if the outer diameter of the workpiece W and the machined hole Wa are not accurately centered and parallel to each other, the displacement of the oscillator 3 is absorbed by the movement in the three-dimensional direction and the precision is improved. It is possible to drill holes.

Further, since the processing 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 work piece due to the rotational force at the time of processing, and in this respect also high processing accuracy is secured. .

When the honing process for the workpiece W is completed, the workpiece W is replaced with a new workpiece 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. Contacts the lower surface 15a of the chuck body 15 and pushes the chuck body 15 upward. As a result, the chuck body 15 is pushed up against the resilience 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 separate unit from the honing jig 1, descends from above and thrusts 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 carry-in / carry-out loader expand to chuck the workpiece W from the inside.

Note that this operation can also be performed after the next step. The shutter opening / closing device 35 moves the shutter 16 from the chuck position to the loading / unloading position (see FIG. 5).

That is, in the case of the shutter opening / closing device 35 of FIG. 5 (a), the cylinder rod of the cylinder device 35a retracts to the left in the drawing, and the opening / closing member 35b moves the shutter 16 to the left. Pull. As a result, the shutter 16 is moved from the chuck position to the loading / unloading position, and the steel ball 23a is elastically locked in the loading / unloading 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 loading / unloading loader is moved from the insertion hole 19 to the workpiece loading / unloading opening 20 through the guide hole 21 while the workpiece W is being chucked.

The work W is unloaded by the loading / unloading loader. That is, the loading / unloading loader moves upward while chucking the workpiece W, and the workpiece W is unloaded upward from the work holding section 13 through the work loading / unloading 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 moves above the honing jig 1 while chucking the workpiece W to be processed next, and then descends, and the workpiece W holds the workpiece through the workpiece loading / unloading opening 20. It is carried into the unit 13 from above.

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 loading / unloading position to 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 moved from the workpiece loading / unloading opening 20 to the insertion hole 19 via the guide hole 21 while chucking the workpiece W. In other words, the shutter 16 is closed 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 claw of the loading / unloading loader is 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, and the upward pressing state of the chuck body 15 by the pressing portion 32 of the opening / closing member 30b is released, and the positioning pin 31 also opens at the lower end opening of the rocking body 3. The part 3a exits downward. 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.

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

As a result, the honing tool insertion hole 19 of the shutter 16 and the work loading / unloading opening 20 are provided independently of each other. As a result, the tip chuck claw of the loading / unloading loader is placed inside the workpiece W. Since the shutter 16 cannot be opened / closed in the state of being put in, the work W replacement procedure is slightly different from that of the first embodiment as follows.

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. The tip chuck claw of the carry-in / carry-out loader is contracted and closed, and the chuck of the workpiece W is released. 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 workpiece W is clamped by the chuck mechanism 14 by the chuck opening / closing device 30.

The present invention is not limited to the above-described first and second embodiments, and various design changes can be made. For example, the work holder 13 of the rocking body 3 and the shutter 16 of the chuck mechanism 14 have different shapes and dimensions. As shown in FIGS. 7 (a), 7 (b), 7 (c), and 7 (d), they are variously deformed according to the shape and size of the workpiece W to be processed.

[0057]

[Effect of device]

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

(1) The workpiece chuck mechanism includes a chuck main body and a shutter, and the chuck main body is provided on a swinging 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 mounted on the upper end of the chuck body and is movable in the horizontal direction between the chuck position and the loading / unloading position. Since the other equipment such as the loader and loader has a separate and independent structure, a hydraulic cylinder, hydraulic piping, etc. are not required, and the size and weight of the honing jig can be reduced 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 machining accuracy can be secured. In addition, it is possible to automatically carry in and out the work piece with respect to the honing jig.

(2) Since there is no hydraulic piping or the like, there is no need for the conventional piping treatment, the driving means itself is simple, and moreover, a transfer-type honing machine of a type that conveys a honing jig, 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 unnecessary, 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 is performed by the jig base. This can be easily done with the adjusting screw attached to etc., so that the amount suitable for the workpiece can be set.

(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 strain is generated depending on the wall thickness and the shape of the workpiece. Even if this is the case, 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.

[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

[Procedure amendment]

[Submission date] October 7, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] Figure 8

[Correction method] Added

[Correction content]

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.

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.