JPS6315106B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a polishing device for surface treatment of workpieces such as cylinder heads, cylinder blocks, gear housings, etc. of automobile engines.

Generally speaking, there is a suspended movement type of polishing equipment in which the workpiece is suspended by a moving suspension device and transported from the loading position through the polishing work room to the unloading position. The drawback is that it requires a large installation area and the device becomes large.

In addition, in order to eliminate the above defects, a patent application filed in 1973-
As shown in No. 118128 (Japanese Unexamined Patent Publication No. 56-45371), a mounting disk for a workpiece is rotatably supported in a cabin chamber, and the inside of the cabin is provided with one attachment/detachment chamber and two grinding chambers for the mounting disk. Three rotating partition plates that can be divided into cleaning chambers are installed radially, and three sets of clamping devices that can clamp both ends of the workpiece are attached to each of the mounting disks. There was also a rotary type that was installed between the two.

However, in order to achieve the original purpose of having two grinding chambers, which is to shorten the cycle time of the grinding process, this device has two cleaning chambers, one for each clamping mechanism, and one for the workpiece. It requires two devices: one to feed the workpiece and one to remove the polished workpiece from the clamp mechanism, and three sets of clamp mechanisms are also installed, making the structure complex and making it difficult to manufacture. Another drawback was that assembly was extremely troublesome.

An object of the present invention is to solve the above-mentioned conventional defects by rotatably disposing a rotary partition plate in a fixed position in a cabin, which can divide the same room into one attachment/detachment chamber and one grinding chamber. The rotary partition plate is provided with clamp devices for clamping the workpieces so as to correspond to the attachment/detachment chamber and the cleaning chamber of the cabin, respectively, and a device for carrying in and out of the workpieces is provided corresponding to the attachment/detachment chamber. It is an object of the present invention to provide a polishing device whose structure can be simplified and manufacturing and assembly can be easily performed.

An embodiment embodying the present invention will be described below with reference to the drawings.

The grinding device of this embodiment can be roughly divided into two parts: the workpiece is clamped in the attachment/detachment chamber of the cabin attached to a predetermined position on the machine frame, and the workpiece is inverted 180 degrees to the grinding chamber, and the workpiece is polished in the grinding chamber. A clamp reversal mechanism for the workpiece that rotates the workpiece 180 degrees and moves it to the loading/unloading chamber, and a clamp reversal mechanism that rotates the workpiece that has been reversed and stopped at a predetermined position in the grinding chamber. There is an automatic stop mechanism that stops the clamp pin of the clamp device at a predetermined position, and a workpiece is conveyed into the attachment/detachment chamber of the cabin, and the workpiece is polished from the attachment/detachment chamber. The loading/unloading mechanism section is configured to transport the processed workpiece, and the workpiece is polished by spraying abrasive materials such as steel balls or grits at high speed toward the workpiece in the grinding chamber of the cabin 2. There is an abrasive material projection mechanism that can be swept away, and the abrasive material that can be reused by collecting and reusing debris such as burrs and sand thrown off from the sprayed abrasive material and the workpiece. The abrasive material is separated from the debris and the abrasive material is returned to the abrasive material projection mechanism section.

First, we will explain the clamp reversal mechanism of the workpiece with reference to Figures 3 to 7. In the drawings, 1 is a machine frame constructed by connecting square pipes, angle materials, iron plates, etc. vertically and horizontally, and 2 is a machine frame. It is a nearly square box-shaped cabin mounted at an intermediate position between the upper and lower sides of 1, and has a window 2a on the front side through which workpieces can be taken in and out, and circular holes 2b on both left and right sides, respectively.
A window 2c is provided on the rear surface, and a window 2d for inspecting and repairing the interior is provided, and can be opened and closed by an opening/closing door 3.

4 is rotatably supported by a pair of bearings 5 and 6 installed on both the left and right sides of the machine frame 1, as shown in FIG.
A support shaft 7 passing through the center of the holes 2b and 2c of the cabin 2 is a rotary partition plate fixed on the support shaft 4, and when the cabin 2 is in the vertical position shown in FIG. window 2a side) and rear side (window 2d side)
A workpiece attachment/detachment chamber Ra and a grinding chamber Rb are defined in each of the chambers. Note that, as shown in FIG. 6, when the rotary partition plate 7 is in the position where the cleaning chamber Rb and the attachment/detachment chamber Ra are formed in the cabin 2, the rotating partition plate 7 is exposed to the abrasive material projected from the abrasive material projection device 79 described later. A slope 7a is formed so that the material hits the partition plate 7 at a substantially right angle, thereby preventing uneven wear of the partition plate 7 and preventing diffused reflection of the abrasive material.

8 and 9 are the rotary partition plates 7 as shown in FIG.
is fixed to both left and right end surfaces of the cabin 2, and the holes 2b of the cabin 2,
A pair of mounting disks each covering the entirety of 2c, each having the hole 2 on their outer surface.
Attachment rings 10 and 11, each having a horizontally short cylindrical shape, are fixedly attached to b and 2c so as to be rotatably and tightly fitted.

12 is a chain attached in a substantially semicircular arc shape along the outer peripheral surface of the left mounting ring 10; 13 is a third chain;
As shown in the figure, this is a drive sprocket wheel that is rotated via a speed reducer 15 by a reversing motor 14 that is fixedly installed on the left side of the machine frame 1 and is capable of forward/reverse and low/high speed switching, and is constantly meshed with the chain 12. When the motor 14 is rotated in the forward and reverse directions, the chain 12, mounting rings 10, 11, mounting disks 8, 9, rotating partition plate 7 and support shaft 4 are integrally rotated in the forward and reverse directions, resulting in a 180 degree forward and reverse reversal. The operation is performed intermittently.

16A and 16B are mounted to the mounting disks 8 and 9 so as to be located on one side with the rotary partition plate 7 as a boundary and facing each other, and are configured to clamp the workpiece. The second clamp devices 16C and 16D are third and fourth clamp devices mounted on the mounting disks 8 and 9 on the other side of the rotary partition plate 7 and facing each other. The first and second clamp devices 16A and 16B are provided symmetrically at positions 180 degrees apart from each other.

These first to fourth clamp devices 16A to 16D
are all formed in the same structure, so next,
The structure of only the first clamp device 16A will be explained with reference to FIG. The piston 19 is fitted with a cylindrical rod 2.
0 is inserted and fixed in the horizontal direction.

The proximal end of the rod 21 is fixed to a support piece 22 that stands up above the rear end (the left end in FIG. 7) of the rod 20, and the rod 20 and It is a rotation prevention rod for the rod 20 inserted so as to be parallel and horizontally reciprocating, and at its front end there are two dots 24 and 25 for adjusting the position of the rod 20 for setting the reciprocating stroke. Possibly fitted. When one of the docks 24 operates a limit switch (not shown), the rod 20 is stopped at the most advanced position, and when the other dog 25 operates a limit switch (not shown), the rod 20 is stopped at the most advanced position. There is.

Reference numeral 26 denotes a rotary support shaft which is supported rotatably and immovably in the axial direction of the rod 20, and a disk-shaped mounting plate 27 is fastened to the front end of the shaft by a nut 28. Reference numeral 29 denotes three clamp pins for clamping the workpiece supported so as to protrude forward at 120 degrees from the connecting plate 31 which is fastened to the front surface of the mounting plate 27 with nuts 30. A stopper 32 for restricting movement of the workpiece toward the rotary support shaft 26 is fixedly attached to the inside thereof. Note that the mutual arrangement of the clamp pins 29 can be set as appropriate depending on the shape of the workpiece. 33 is a protective case that is removably fitted to a mounting tube 34 fixed to the inner surface of the mounting disk 8 so as to surround the rotation support shaft 26, and is designed to prevent abrasive material from colliding with the cylinder rod 20. It's summery.

The solid line in FIG. 7 shows the state in which the cylinder rod 20, rotation support shaft 26, and clamp pin 29 are in the most retracted position before clamping the workpiece W, and the two-dot chain line in the same figure shows the state in which the clamp pin 29 is in the most advanced position. In this state, the outer surface of the workpiece W and the three clamp pins 29
so that there is a slight gap between one of them.
Further, the most advanced position of the clamp pin 29 is set by the dot 24 so that a slight gap G is formed between the end surface of the workpiece W and the stopper 32.

Next, a rotation stop mechanism unit that rotates the workpiece W held by the clamp pin 29 in the cleaning chamber Rb of the cabin 2 and stops the clamp pin 29 at a predetermined position after the cleaning is completed. When explained with reference to Figures 4 and 5 and Figures 7 and 8,
35 is a driven sprocket wheel fixed to the outer end of the rotation support shaft 26 of the clamp devices 16A, 16C, and 36 is a driven sprocket wheel that is tilted with respect to a support shaft 38 rotatably supported by a bearing member 37 fixed to the left side of the cabin 2. A driven sprocket wheel 39 is supported by a shaft 40 between the upper ends of a pair of support arms. 41 is the support shaft 38
A drive chain is attached to the drive sprocket wheel 42b of the double sprocket wheel 42 supported above and the driven sprocket wheel 39, and the clamp device 16A clamps the workpiece to the grinding chamber of the cabin 2. When the driven sprocket wheel 3 is stopped moving to Rb,
It is designed to be meshed with 5.

As shown in FIGS. 4 and 5, 43 is an air cylinder rotatably supported on the tip of a mounting arm 44 horizontally cantilevered on the side surface of the cabin 2, and its rod 45 is attached to the support arm 36. It is articulated near the upper end. When the rod 45 of the air cylinder 43 is actuated, the support arm 36 and the drive chain 41 are tilted about the support shaft 38, and the drive chain 41 and the driven sprocket wheel 35 are tilted.
are adapted to be engaged and disengaged.

46 is a reducer installed on the machine frame 1 below the support arm 36, and its output shaft 47
A driving sprocket wheel 48 is fixed to the
A chain 49 is hung between the wheel 48 and the driven sprocket wheel 42a of the double sprocket wheel 42. Reference numerals 50 and 51 indicate high speed and low speed motors which are fixedly installed in the machine frame 1 and connected to the reduction gear 46, and are capable of rotating the drive sprocket wheel 48 at high and low speeds. In this embodiment, the driving sprocket wheels 48, 42b and the driven sprocket wheels 42a, 35 have the same number of teeth, and when the driving sprocket wheel 48 rotates once, the driven sprocket wheel 35 and the rotationally supported The shaft 26 and clamp pin 29 are adapted to be rotated once.
Further, although not shown in the vicinity of the drive sprocket wheel 48, there is provided a high/low speed switching mechanism for switching between the high speed and low speed motors 50, 51 while the wheel 48 rotates once. .

As shown in FIGS. 7 and 8, 52 is an air cylinder attached to a bracket 53 fixed to the outer periphery of the end of the rod 20 of the cylinder 17, and the rod 54 has an arc-shaped brake shaft at its tip. 55
is fixedly attached and pressed against the outer periphery of the rotation support shaft 26. 56 is the rotation support shaft 2
The actuating piece 57 is fixed to the end face of 6, and 57 is the actuating piece 56.
This is a proximity switch installed at a fixed position on the machine frame 1 correspondingly, and is connected to a timer (not shown), and becomes ready for operation when the timer expires after a set period of time has elapsed. When operated, the air cylinder 52 is operated, the brake shoe 55 is pressed against the rotary support shaft 26, the support shaft 26 is stopped, and the clamp pin 29 is stopped at a fixed position.

Next, FIGS. 9 to 11 show a loading/unloading mechanism for loading the workpiece W into the loading/unloading chamber Ra of the cabin 2 and unloading the polished workpiece W' from the loading/unloading chamber Ra. To explain the diagram, 5
A roller conveyor 8 is mounted on the upper surface of a support frame 59 fixed to the machine frame 1, and is rotated in the same direction by a motor 60 and a chain 61.

As shown in FIG. 11, 62 is a fixed support frame attached to the upper surface of the cabin 2 and extends horizontally, and 63 is a back-and-forth movable frame attached to the support frame 62 so as to be movable in the front-rear direction. It is designed to be moved back and forth by a rod 65 of an air cylinder 64 fixed horizontally to the frame 62. 66 is the longitudinal movement frame 63
It is an elevating frame mounted on the frame 63 so as to be movable in the vertical direction, and is moved up and down by a rod 68 of an air cylinder 67 fixed downwardly to the longitudinally movable frame 63. Reference numeral 69 denotes a pair of forks that support the workpiece fixed to the lower end of the lifting frame 66, and the corresponding roller conveyor 58 is provided with two recesses 58a as shown in FIG. The upper surface of the fork 69 is slightly lowered from the upper surface of the roller conveyor 58 when the fork 69 moves to the lowest position.

Reference numerals 70 and 71 are doors for opening and closing the window 2a that are mounted movably in the left and right directions on the front surface of the cabin 2, and are mounted horizontally on the lower surfaces of a pair of support arms 72 and 73 fixed to the fixed support frame 62. The air cylinders 74 and 75 are opened and closed by rods 76 and 77.

Next, Figures 1, 2 and 6 show the abrasive material projection mechanism and the abrasive material sorting and reduction mechanism that project the abrasive onto the workpiece in the grinding chamber Rb of the cabin 2. To explain, 78 and 79 are centrifugal abrasive material projection devices installed on the top surface and slope of the cabin 2, and the hopper 8 installed on the top of the machine frame 1.
The abrasive material supplied from 0 through the pipe 81 can be projected toward the workpiece W in the polishing chamber Rb.

82 is a cross section V arranged below the cabin 2
It is a collection gutter in the shape of a letter, and is a cleaning room for cabin 2.
Used abrasive material flowing down from Rb, debris such as burrs shot off from the workpiece, and a small amount of abrasive material and debris from the attachment/detachment chamber Ra are collected. Reference numeral 83 is a bucket elevator whose lower end is connected to the collection gutter 82, and is capable of transporting abrasive materials, dirt, etc. transferred by a screw conveyor 84 disposed at the bottom of the collection gutter 82 upward. It's becoming like that.

Reference numeral 85 denotes a first separator connected to the upper end of the bucket elevator 83, which separates the abrasive material and dirt supplied by the screw conveyor 86 into those with a particle size larger than that of the abrasive material and those with a particle size smaller than that of the abrasive material. The particles having a particle size larger than that of the abrasive are discharged to the outside through a pipe 87. Reference numeral 88 denotes a second separator of specific gravity sorting type that communicates with the first separator 85, and light particles such as dust are removed from the pipe 8.
The abrasive material is transferred to a pre-duster 91 (to be described later) via a pipe 90, relatively heavy dirt is discharged to the outside via a pipe 90, and normal abrasive material is returned to the hopper 80.

91 is a pre-duster attached to the upper part of the machine frame 1, and is connected to the second separator 88 and the cabin 2.
Dust contained in the air sucked in from a pipe (not shown) communicating with the cleaning chamber Rb can be separated and sorted. Note that the usable abrasive material separated by the pre-duster 91 is returned to the cleaning chamber of the cabin through a pipe 92. 9
3 is a dust collector that communicates with the pre-duster 91 via a pipe 94.

Next, the operation of the cleaning device configured as described above will be explained.

Now, Fig. 6 shows that the polished workpiece W', which is loosely clamped by the clamp devices 16A and 16B, is in the loading/unloading chamber.
Ra is stopped at the attachment/detachment position, and the clamping device 16C,
Workpiece W before polishing loosely held by 16D
is stopped at the cleaning position in the cleaning chamber Rb, and as shown in FIG.
5 and the rotation support shaft 26 starts rotating. In this state, two abrasive material projection devices 7
From 8 and 79, the abrasive material is projected toward the rotating workpiece W, and the cleaning is started. High speed and low speed motors 50, 51 are operated while the workpiece W makes one rotation.
is switched, and when the part of the workpiece W that requires more cleaning is moved to a position corresponding to the abrasive material projection devices 78, 79, it is slowly rotated by the low-speed motor 51. At other times, it is rotated quickly by the high speed motor 50.

In synchronization with the start of rotation of the workpiece W, the pair of doors 70, 71 are moved away from each other by the air cylinders 74, 75, the window 2a of the cabin 2 is opened, and at the same time the window 2a of the cabin 2 is opened. As shown by the solid line in FIG. 11, the fork 69 that was waiting in the recess 58a of the roller conveyor 58 is moved forward by the air cylinder 64 together with the forward and backward movement frame 63 and the elevating frame 66, and the fork 69 is moved forward as shown by the chain double-dashed line P1 in FIG. material
When moved to the lower position of W', the air cylinder 64
is stopped, and the forward movement of the fork 69 is stopped.At the same time, the air cylinder 67 is activated to raise the fork 69 together with the lifting frame 66, and the fork 69 moves toward the workpiece as shown by the two-dot chain line P2 in FIG.
When it rises to a position where it contacts the lower surface of W', the air cylinder 67 stops and the fork 69 stops. At the same time as this operation, the clamp device 16A,
Air cylinder 17 of 16B operates and rod 2
0, the rotation support shaft 26 and the clamp pin 29 move back together, and the clamping of the workpiece W' is released.
Workpiece W' is supported by forks 69.

The air cylinder 64 is operated in synchronization with the release of the clamping devices 16A and 16B, and the forward and backward moving frame 6
3. When the elevating frame 66 and the fork 69 move backward together and move above the roller conveyor 58 as shown by the two-dot chain line P3 in FIG. 11, the air cylinder 64 stops and the fork 69 stops moving backward;
After that, the air cylinder 67 is operated and the lifting frame 6
6. The fork 69 is in the recess 5 of the roller conveyor 58
The movement is stopped at 8a. The workpiece W' supported on the fork 69 is then transferred to the roller conveyor 5.
8.

Next, when the workpiece W is moved by the roller conveyor 58 to a position corresponding to the fork 69,
After the fork 69 moves up to the position P3 on the two-dot chain line in FIG.
The workpiece W is moved to a position indicated by the two-dot chain line P2 in the figure, and in this state, the rod 20, rotational support shaft 26, and clamp pin 29 of the clamping devices 16A and 16B move forward to clamp the workpiece W. Thereafter, the fork 69 is moved from the two-dot chain line P2 to P1 in FIG.
is activated and the doors 70, 71 are closed.

In this way, clamp devices 16A, 16B
The workpiece W' held between the two is carried out, and then the workpiece W is carried into the loading/unloading chamber Ra.
The workpiece W in the polishing chamber Rb rotates until this loading and unloading is completed, and the workpiece W is uniformly polished during this period.

When the cleaning of the workpiece W is completed, the high-speed and low-speed motors 50 and 51 are stopped at the position where the operating piece 56 corresponds to the proximity switch 57, the drive chain 41 is stopped, and the air cylinder 52 is activated. The brake shoe 55 is pressed against the rotation support shaft 26, and the clamp pin 29 is stopped at a fixed position.

The air cylinder 43 is operated in synchronization with the stopping of the clamp pin 29, and the support arm 36 is moved to the support shaft 3.
8 in the counterclockwise direction in FIG. 4, and the drive chain 41 and driven sprocket wheel 35 are disengaged from each other.

Thereafter, when the reversing motor 14 is activated and the drive sprocket wheel 13 is rotated, the chain 12, the mounting rings 10, 11, the mounting disk 8,
9. The rotary partition plate 7 and the support shaft 4 are rotated as one, and when rotated 180 degrees, the clamp devices 16C and 16D that clamp the workpiece W' are reversed and stopped in the loading/unloading chamber Ra, and a new workpiece is loaded. The clamping devices 16A and 16B that clamp the workpiece W are reversed and stopped in the grinding chamber Rb, and then the workpiece W' in the loading/unloading chamber Ra is carried out by the fork 69 in the same manner as described above. The workpiece W in the cleaning chamber Rb is carried into the attachment/detachment chamber Ra by the same fork 69, and the workpiece W in the polishing chamber Rb is polished.

Now, in the embodiment of the present invention, two chambers, the attaching/detaching chamber Ra and the grinding chamber Rb, are provided in the cabin 2, and a clamping device 16 is provided for the mounting disks 8, 9.
A, 16B, 16C, and 16D are provided, and a loading/unloading mechanism is also provided to take out the workpiece W' in the attachment/detachment chamber Ra and bring in a new workpiece W, so the clamp reversal mechanism for the workpiece W is Also, the loading/unloading mechanism section can be simplified to facilitate manufacturing and assembly.

As described in detail above, the present invention includes a rotary partition plate that is rotatably disposed in a fixed position in a cabin and can partition the cabin into one attachment/detachment chamber and one grinding chamber, and By providing a clamping device for clamping the workpiece so as to correspond to the attachment/detachment chamber and the grinding chamber of the cabin, respectively, and further provide one device for carrying in and out of the workpiece corresponding to the attachment/detachment chamber. This has the effect of simplifying the clamp reversing mechanism and the loading/unloading mechanism for the workpiece, making it easier to manufacture and assemble.

[Brief explanation of the drawing]

Fig. 1 is a front view of a grinding device embodying the present invention, Fig. 2 is a left side view of the same, Fig. 3 is a partially enlarged front view showing the cabin with the opening/closing door removed, and Fig. 4 is a front view of the cabin. Figure 5 is a left side view of the vicinity only, Figure 5 is a cross-sectional view as seen from the front, Figure 6 is a cross-sectional view seen from the left side, Figure 7 is an enlarged front view of only the clamp device, and Figure 8 is a cross-sectional view of the clamp device. FIG. 9 is a front view showing the support mechanism for the cabin opening/closing door and the loading/unloading mechanism, FIG. 10 is a plan view of the loading/unloading mechanism, and FIG. 11 is a side view of the loading/unloading mechanism. It is. Cabin...2, Support shaft...4, Rotating partition plate...
...7, Mounting disk...8,9, Clamp device...
...16A to 16D, Rotation support shaft...26, Clamp pin...29, Driven sprocket wheel...
35, Drive chain...41, Roller conveyor...
...58, Fork...69, Abrasive material projection device...
78, 79, attachment/detachment room...Ra, cleaning room...Rb.

Claims (1)

[Scope of Claims] 1. A cabin mounted on a machine frame; a rotary partition plate rotatably supported in the cabin chamber and capable of dividing the cabin into one attachment/detachment chamber and one grinding chamber; a pair of mounting disks that are attached to both ends of the partition plate so as to be rotatable together with the partition plate and close openings formed on both sides of the cabin, respectively; It is installed so that it is located on both sides,
There are two sets of clamping devices that can hold the workpiece from both sides, and the workpiece is rotated by the clamping members of the clamping device that has been moved to the grinding room. an abrasive material projection mechanism part provided corresponding to the cleaning chamber of the cabin and capable of projecting an abrasive onto the rotating workpiece; , characterized by comprising a loading/unloading mechanism section provided corresponding to the loading/unloading chamber of the cabin, for loading the workpiece after being polished in the same chamber, and loading the workpiece before being polished. A grinding device. 2. The workpiece loading/unloading mechanism includes a roller conveyor provided with a recess, and the roller conveyor advances from the recess and rises to receive the workpiece, then retreats and descends to deliver the workpiece to the roller conveyor. Claim 1 is comprised of a fork that receives the workpiece sent onto the roller conveyor, rises and moves forward, and delivers the workpiece to the clamping device in the attachment/detachment chamber. cleaning equipment.