JPS62236665A - Polishing cloth sheet type automatic grinding device for work - Google Patents

Abstract

PURPOSE:To feed a new cloth sheet when a polishing cloth sheet has worn and improve work efficiency by providing a tension device pulling the polishing cloth sheet with a fixed pressure in a device finish-processing the oil seal section of the crank shaft of an engine. CONSTITUTION:One end of a roll-shaped polishing cloth sheet 33 is extracted and traversed through a guide groove 23b and is guided upward via a guide roller 21 and a roller 36 and is suspended through guide rollers 40, 40, then a weight 43 is hung at its tip. The pressing face 23a of a pressing member 15 is pressed to a work 26 via a polishing cloth sheet 32a and grinds it in a double-cut shape. When the polishing cloth sheet 33a has worn or abrasive grins have dropped, a stepping motor is driven to rotate a reel by a predetermined angle, and the polishing cloth sheet 33a is fed out. Accordingly, the weight 43 draws the polishing cloth sheet 33 to guide the new polishing cloth sheet 33a on the pressing face 23a, thus the trouble for replacement can be saved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic coated abrasive grinding device for finishing workpieces such as oil seals of engine crankshafts.

[Prior art and problems to be solved by the invention] As is well known, for example, the seal portion that comes into sliding contact with the oil seal of the engine crankshaft is ground and finished in order to maintain airtightness between it and the oil seal. ing.

An automatic grinding device using coated abrasive paper is one of the devices for grinding parts to be polished, such as the seal portion of a crankshaft, which is an example of this workpiece.

This type of coated abrasive paper type automatic grinding device was developed, for example, in
-39903 Publication or Special Publication No. 57 58268
As disclosed in the J3 publication, a closed-loop coated abrasive paper is stretched between a driving wheel and a driven wheel that are interlocked with the L-coat, and the coated abrasive paper is rotated by the drive of the motor. In this polishing step, the polished part of the workpiece that comes into contact with the paper is finished by grinding, or the outer periphery of the disc is coated with abrasive paper for 35 minutes.
There is a method that grinds the part of the workpiece to be polished by grinding and rotating the disk.

However, in the conventional coated abrasive paper-type automatic grinding machine, a closed loop of coated abrasive paper is stretched over the driving wheel and driven wheel, so that the coated abrasive paper changes over time. The work of replacing the coated abrasive paper when it wears out or when the abrasive grains coated on the surface of the coated abrasive paper fall off is complicated.

Furthermore, since the coated abrasive paper is replaced when the coated abrasive automatic grinding device is stopped, the operating efficiency is reduced accordingly.

[Object of the Invention] The present invention was made in view of the above circumstances, and when the coated abrasive paper in the part that contacts the work wears out or the abrasive grains of the coated abrasive paper in this part fall off, a new one is created. It is an object of the present invention to provide a coated abrasive paper type automatic grinding device for a workpiece, which can automatically supply coated abrasive paper to improve work efficiency and improve the operating efficiency of the device.

[Means for Solving the Problems] The automatic coated abrasive grinding device for a workpiece according to the present invention comprises a coated abrasive paper roll held in the main body of the device so as to be freely fed intermittently, and an extended end of the coated abrasive paper. a tensioning device that pulls the coated abrasive paper at a constant rate of 11; a pressing member that presses the extended portion of the coated abrasive paper onto a part to be polished of a workpiece supported on a work table; A vibrating device that makes slight reciprocating movements while in sliding contact with the polished portion of the workpiece, and a drive device that rotates the workpiece are provided.

For example, when a press member presses abrasive cloth against the part to be polished of a workpiece, and the workpiece is rotated by a drive device, when the vibrating device vibrates the press member, the press member causes the workpiece to be rotated. The coated abrasive paper pressed against the part to be polished moves slightly back and forth over the part to be polished, thereby polishing the part to be polished. If the part of the coated abrasive paper that comes into contact with the part to be polished of the L workpiece becomes worn, or if the abrasive grains coated on the coated abrasive paper fall off, remove the roll of coated abrasive paper. The coated abrasive paper is fed out intermittently, and the extending end of the coated abrasive paper is pulled by the tension of a tensioning device, so that a new coated abrasive paper faces the part to be polished of the workpiece.

[Embodiments of the invention] Hereinafter, the present invention will be described in detail with reference to the drawings.

The drawings relate to one embodiment of the present invention, and FIG. 1 is a partially sectional front view of a coated abrasive type automatic grinding device, FIG. 2 is a schematic front view of the entire abrasive cloth type automatic grinding device, and FIG. A side view of the coated abrasive paper type automatic grinding device, Fig. 4 is an enlarged side view of the main parts of the coated abrasive paper type automatic grinding device, Fig. 5 is an enlarged view of the Δ section of Fig. 1, and Fig. 6 is an enlarged view of the Δ section of Fig. 1. 7 is a cross-sectional view taken along ■-Vl in FIG. 4, FIG. 8 is a cross-sectional view taken along ■--■ in FIG. 4, and FIG. 9 is a cross-sectional view taken along ■--■ in FIG.

In these figures, reference numeral FS1 is a leg erected on a base B, and one bed 2 is installed on this leg 1.

On this bed 2, mutually opposing daples 33 are placed so as to be movable in the left-right direction in FIG. 1 along guide means (not shown). Also, on the side surface of the table 3.3 in the hyper-movement direction, there is also a threaded portion 4 of an adjustment screw 4 for adjusting the position of the table 3, which is rotatably supported at the side end of the bed 2.
A is screwed in and C is inserted.

Further, a support frame 6 is provided over the columns 5 erected on each of the tables 3, 3, and a cylinder body 7a of a hydraulic cylinder 7, which is an example of the actuator 1, is vertically fixed to the support frame 6. There is.

Furthermore, a yoke 8 is fixed to the lower end of the plunger 7b, which is inserted into the cylinder body 7a so as to be freely advanced and retracted.

A pin 9 is inserted into this yoke 8 along the BfJJ direction of the table 3.
0 is inserted so as to be freely movable in the axial direction.

Further, an eyepole 1-11 is inserted into this oil-impregnated bearing 10, and is prevented from being removed by a snap ring 12.

Further, a rod 171 is connected to the threaded portion 11a of the eye bolt 11 via the fastening member 13.

Furthermore, the lower part of this rod 14 passes through relief holes 2a and 3a bored in the bed 2 and table 3 and extends downward in the figure, and the shank 16 of the pressing member 15 is inserted into the lower end of the rod 14. , a pin 17, and a key 18.

Further, a central portion of a roller holder 19 extending in the horizontal direction in the figure is fixed to the lower end of the sink 16 via a bracket 20. Guide rollers 21 are rotatably supported at both ends of the roller holder 19 via pins 22, and a pressing portion 23 is vertically provided at the center of the bottom surface of the roller holder 19. A pressing surface 23a is formed in a concave curve on the lower surface of this pressing portion 23, and this pressing surface 23a
Guides t1423t) are formed on both sides of.

Further, a work table 24 installed and fixed to the base B is opposed to the lower part of the pressing part 23.

A work support jig 25 is fixedly installed on the work table 24. This workpiece support jig 25 has a journal 26a formed on the crankshaft 11 foot 26, which is an example of the workpiece.
is mounted and supported. In addition, the above Krafushi 11ft 2
The pressing surface 23 of the pressing section v115 is attached to the sealing section 26c of No. 6.
a are facing each other. Furthermore, the crankshaft 2
A headstock 27 as a drive device and a tailstock 28 are provided opposite to each other on both axial end surfaces 26b and 26d of 6.

Note that both axial end surfaces 26b of the crankshaft 26
, 26d has a main lN127 light width, which will be described later:
Conical old holes 26c, 2 with which the tip of the tailstock shaft 28d engages
6c is formed.

A bed 27 fixedly installed on the base B of the headstock 27
On a, the axial direction of the crankshaft for each second.j
A saddle 27c is mounted which is movable in the horizontal direction of FIG. 2 according to a feeding device 27b for handling the load. A hydraulic cylinder 27h is fixedly installed on this saddle 27C,
A drive shaft 27f is provided which can move forward and backward in the axial direction by this hydraulic cylinder 27h. In addition, the drive shaft 27 ``
is the motor 27d fixedly installed on the hydraulic cylinder 27h.
, it is rotated via the reduction gearing device fff27c. Furthermore, the above drive e'rll127
A main shaft 27a facing one axial end surface 26b of the crankshaft 26 is fixedly attached to the tip of the crankshaft 26.

It is. Note that the reference numeral 271 is a handle connected to the feeding device 27b.

Additionally, a hydraulic cylinder 28 provided on the tailstock 28
The cylinder body 28b of a is fixed to a bracket 29 erected on the work table 24. Further, a plunger 1ν2 is inserted into the cylinder body 28b so as to be freely retractable.
A rotatable tailstock shaft 28d facing the other axial end surface 26d of the crankshaft 26 is fixedly attached to the tip of the crankshaft 8c.

Furthermore, a stopper 28e that can be freely adjusted in the axial direction is attached to the end #a of the plunger 28c.
When G moves to the right in Figure 2.

End surface 28 of the stopper 28e on the cylinder body 28b side
When r comes into contact with the cylinder body 28b, plunge t! The movement m of 28G is regulated, and the crankshaft 26 can be positioned when the crankshaft 26 is held between the tailstock shaft 28d and the main shaft 27q.

On the other hand, a holder 30 is vertically installed on one side of the support frame 6 to which the cylinder body 7a of the hydraulic cylinder 7 is fixedly mounted.
A stepping motor 31 is fixed to this holder 30. Further, a boss 32b formed on a reel main body 32a of a reel 32 is fixed to the rotating shaft 31a of the stepping motor 31, and a rolled abrasive coated paper 33 is set on the reel main body 32a.

Furthermore, a side plate 320 is attached to the boss 32b of the reel body 32a from the side and is fixed by a bolt 34, and the rolled coated abrasive paper 33 is connected to the side plate 32C and the reel body 32[1]. is supported by clamping.

On the other hand, brackets 1-35 are fixedly installed at positions facing each other across the rod 14 of the daple 3, and a roller 36 is rotatably supported on the brackets 1-35 via a pin 37.

Further, the coated abrasive paper 33a extended from the rolled coated abrasive paper 33 passes through the one (right side in FIG. 4) row 536 and the guide roller 21 which is pivotally supported by the roller holder 19. , traverses the pressing surface 23a from the guide groove 23b of the pressing portion 23, passes through the other guide groove 23b, the guide roller 21, and the roller 36, and extends upward in FIG.

Further, a leg 38 is erected on one side (left side in FIG. 3) of the support frame 6 on which the cylinder body 7a of the hydraulic cylinder is fixed, and a bracket 39 is fixedly attached to the upper end of this leg 38. Guide rollers 40 are attached to both ends of this bracket 39.
is pivotally supported via a bin 41. The extending portion of the coated abrasive paper 33a is hooked to both guide rollers 40, and the way 1 is connected to this extending end via a support bolt 42.
At -43, J: is pulled downward in the figure.

On the other hand, the symbol @44 is a vibration device. Holders 45 of this vibration device 44 are each fixedly mounted on the pair of opposing tables 3.degree. 3, and holes 458 are bored through the holders 45 in the horizontal direction in FIG. 1.

A pair of bushings 46 are attached to this hole 45a from both sides, and seven flange 46 is formed on the end face of each bushing 46.
a is fixed to the end face of the hole 45a with a bolt 56.

Further, a plunger 47 is inserted into the bush 46 via an oil-impregnated bearing 48 and an oil seal 49 so as to be able to move forward and backward. Also, a key groove 4 is provided in the center of the bottom of this plunger 47.
7a is bored along the axial direction, and this key 864
7a, the key 50 held between the pair of pushers 146 is engaged, and the plunge! /47 rotation is restricted.

On the other hand, an oval hole 47b which is elongated in the circumferential direction is bored in the center of the -L portion of the plunger 47, and an eccentric ring 51 that presses the plunger 47 in the axial direction is inserted into this oval hole 47b. An output 'rllll 53a of an lζ control motor 53, which is fixed to the holder 45, is pivotally supported by the eccentric ring 51 via a coupling 52.

Further, a flange 47C is formed at one end of the plunger 47, and a sleeve 54 is slidably inserted into the rod 14, and this sleeve 54 is attached to the flange 47c formed on the plunger 47 with a clamp member 55.
are connected via.

Next, the operation of the coated abrasive paper type automatic grinding device having the above configuration will be explained.

First, the O-ring-shaped coated abrasive paper 33 is set on the reel body 32a of the reel 32, and then the side plate 32c is attached to the side surface of the reel body 32a and loosely fixed with bolts 34.

Then, take out one end of the rolled coated abrasive paper 33,
The extended coated abrasive paper 33a is transferred to one of the rows 536 which is pivotally supported to the table 3 via the bracket 35, and one of the guide rollers 2 which is pivotally supported to the roller holder 19.
1, a guide groove 23 formed on the bottom surface of the pressing part 23
traversing between 1 and 2, passing through the guide roller 21 pivotally supported on the other side of the roller holder 19, and the roller 36 pivotally supported on the other bracket 35, and leading upward through the hydraulic cylinder 7.
A guy troller 40. is pivotally supported on a bracket 39 fixed via legs 38 to a support frame 6 for fixing the guy/troller 40.
40, and a weight 43 is suspended from the tip via a support bolt 42.

After that, attach the ID plate 32G with the above symbol to the reel body 3.
2a, and the roll-shaped coated abrasive paper 33 is clamped and fixed. Then, a certain tension is generated in the coated abrasive paper 33a due to the weight of the weight 43.

Next, journals 26a formed at both ends of the crankshaft 26, which is an example of a workpiece, are placed on a pair of workpiece support jigs 25 provided on the workpiece table 24.

Then, when you turn on the operation switch (not shown), 8
Plunge t728G of hydraulic cylinder 28a of push platform 28
is projected in the direction of the crankshaft 26, and an eight push shaft 28d provided at the tip of the plunger 28c comes into contact with the other end surface 26d of the crankshaft 26.

Further, the drive lug 27f of the hydraulic cylinder 27[1 fixed to the little 27C of the headstock 27 is projected in the direction of the crankshaft 26, and the main shaft 270 provided at the tip of the drive shaft 27r is connected to the crankshaft 11. It comes into contact with the one end surface 26b of the throat 26.

-C1 A round hole-shaped hole 2 (3e
At the same time, the tip of the main shaft 270 is engaged with the conical old man 26c formed at the axis of the one end surface 26b, and the main shaft 27a and the eight push shafts 2
The crankshaft 26 is positioned and held by 8d.

Next, the motor 27d is driven, and this driving force drives the crank shirt I.26 through the deceleration transmission Kff1.
27e,! [Rotate via 6 axes 27f and JJb 27q.

Also, column 5 is placed on table 3 placed on bed 2.
, the plunger 7b of the hydraulic cylinder 7 erected via the support frame 6 is operated to protrude.
The pressing surface 23a formed on the bottom surface of the pressing portion 23 of the pressing member 15 which is connected to Y7b via the yoke 8, eye bolt 11, rod 14, etc. is bound to the seal portion 26c of the crankshaft 26. .

Meanwhile, the vibration device 44 fixedly installed on the table 3
A control motor 53 is driven, and an eccentric wheel 51, which is mounted on an output shaft 53a of the control motor 53 via a coupling 52, rotates through the wall of an oval hole 47b formed in the upper surface of the plunger 47. Press. Then, this plunger sy 47 reciprocates in the left-right direction in FIG. 1 within the bush 46 fitted in the hole 45a of the holder 45 via the oil-impregnated bearing 48. In addition, there is a key at the bottom of the plan seat 47 mentioned above. :'+ 47a is bored along the axial direction, and the key 50 held between the pair of opposing bushes 46 is engaged with this key t1is 47a.
While the plunger 1!47 reciprocates, no wobbling occurs in the rotational direction.

Then, the sleeve 54 gripped by the flange 47G formed at the tip of the plunger 47 and the clamp portion 4455 slightly moves the rod 14 in the left-right direction in FIG. Note that the upper end of the rod 14 is connected to the eye bolt 11 via a fastening member 13, and the eye bolt 11
is slidably supported by the bottle 9 inserted into the yoke 8 via the oil-impregnated bearing 10, so that the
The reciprocating slight movement is absorbed and is not transmitted to the plunger t-7b of the hydraulic cylinder 7.

Then, when the pressing surface 23a formed on the bottom surface of the pressing portion 23 of the pressing member 15 is pressed against the seal portion 26C of the crankshaft 26 via the abrasive paper 33a, the seal i! g126c is ground into a cross-cut shape. The frequency of the rod 14 is determined by the control motor 5.
This can be easily set using a potency A meter (not shown) provided at 3.

Next, after the above-mentioned eye-shaped grinding is completed in a predetermined manner, the drive of the control motor 53 is stopped, and the plunger?
With the reciprocating fine movement of 47 stopped, move the crankshaft 1.
By rotating only the shift 26, the seal portion 26c is ground to a surface roughness of, for example, 1°0s to 1.55.

Then, the seal portion 2 (3c) of the crankshaft 26 is
After finishing the surface to a predetermined value, the plunger 7b of the hydraulic sill 7 is raised, and the pressing part 23 of the pressing member 15 is
The pressing surface 23a formed in the above is separated from the seal portion 26c.

Next, the rotation of the motor 27d provided on the headstock 27 is stopped, and the main shaft 27g interlocked with the motor 27d and the tailstock shaft 28d of the tailstock 28 are tilted from both end surfaces 26b and 26d of the crankshaft 26. After that, the crankshaft 11]l-26 which has been finished in a predetermined manner is removed from the work support jig 25 of the work table 24, a new crankshaft 11 lift 26 is set on the work support jig 25, and the crankshaft 11l-26 is recycled as described above.

Then, the seal portion 26 of the crankshaft 1 shift 1 to 26
When the coated abrasive paper 33a used for grinding G is worn out, or when the abrasive grains coated on the coated abrasive paper 33a fall off, the stepping motor 31 is driven and the rotation of the stepping motor 31 @31a is The reel 32 mounted on the shaft is rotated by a predetermined angle, and the coated abrasive paper 33a is sent out from the coated abrasive paper roll 33 set on the reel 32. Then, at one end of this coated abrasive paper 33a, '&
The depleted weight 43 pulls the coated abrasive paper 33a, and applies a new coated abrasive paper 33a to the pressing surface 23a formed on the bottom surface of the pressing portion 23 of the pressing member 15.

Note that the present invention is not limited to the embodiment of the rtll polishing paper polishing type automatic grinding apparatus; for example, the workpiece is not limited to the crankshaft, but may be any other member. Further, the tension device is not limited to the weight 43, but may be a winding device to which a predetermined tension is applied.

[Effects of the Invention] As explained above, according to the present invention, there is provided a roll-shaped abrasive cloth held in the main body of the device so as to be freely fed intermittently, and a tension device that pulls the extending end of the abrasive Japanese paper with a constant pressure. a pressing member for pressing the extended portion of the coated abrasive paper onto the part to be polished of the workpiece supported on the work table;
It has an excitation device that moves finely back and forth while in flash contact with the cloth paper on the part to be polished of the workpiece, and a drive device that rotates the workpiece, so that the part to be polished of the workpiece can be ground. If the coated abrasive paper in the polishing 1z wears out or the abrasive grains of the coated abrasive paper in this area fall off, by intermittently feeding the roll-shaped coated abrasive paper, the pulling force of the tensioning device will cause new paper to be applied to the pressing member. can automatically supply coated abrasive paper. Therefore, the operator does not have to replace the coated abrasive paper every time as in the past, which not only greatly improves work efficiency, but also improves the operating efficiency of the device since there is no need to stop the device.

[Brief explanation of drawings]

The drawings relate to an embodiment of the present invention, and FIG. 1 is a partial front view of a coated abrasive paper type automatic grinding device, FIG. 2 is a schematic front view of the body of the coated abrasive paper type automatic grinding device, and FIG. The figure is a side view of the coated abrasive paper type automatic grinding device, Figure 4 is an enlarged side view of the main parts of the coated abrasive paper type automatic grinder, Figure 5 is an enlarged view of section A in Figure 1, and Figure 6 is the 1, Figure 7 is a cross-sectional view along ■-■ in Figure 4, Figure 8 is a cross-sectional view along ■-■ in Figure 4, and Figure 9 is a cross-sectional view along ■ in Figure 4.
-IX sectional view. -15...Press member, 26...Workpiece, 26c...
- Part to be polished, 27... Drive device, 33... Roll-shaped coated abrasive paper, 33a... Extension part (of coated abrasive paper), 43.
...Tension device, 44... Vibration device. Figure 5 Figure 6 Figure 7 Figure 8

Claims (1)

[Claims] A roll of coated abrasive paper is held in the main body of the device so that it can be fed intermittently, a tension device that pulls the extended end of the coated abrasive paper with a constant pressure, and a tension device that pulls the extended end of the coated abrasive paper with a constant pressure, and the extended part of the coated abrasive paper is supported on a work table. a pressing member that presses onto the polished portion of the workpiece, a vibration device that slightly moves the pressing member back and forth while in sliding contact with the coated abrasive paper on the polished portion of the workpiece, and a vibration device that rotates the workpiece. An abrasive cloth paper type automatic grinding device for a workpiece, characterized by having a drive device.