JPS6023949B2 - Grinding equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a polishing device, and more particularly to a polishing device that is improved in order to shorten the cycle time in polishing workpieces.

Comparatively, for processed products, a method has been developed in which the processed products are continuously carried in and carried out into the laboratory by a conveyor, etc., and polished, which is sufficiently satisfactory for shortening the cycle time. However, in the case of relatively large workpieces such as engine blocks, it is necessary to stop projecting the abrasive material each time and carry each workpiece into the abrasive chamber one by one. The workpieces are suspended from a crane or the like in a continuous projection state and passed through the grinding chamber continuously, but in the former case, the cycle time becomes longer and productivity decreases. Although the latter can be expected to improve productivity, each has the drawback of requiring enormous equipment costs.

In the present invention, a workpiece loading/unloading station and a grinding station are installed in a grinding chamber, and a workpiece supported by workpiece cantilever devices disposed at several locations on a rotating body is moved to both stations. The purpose of this invention is to provide a device that can rotate the workpieces sequentially between the workpieces and carry in and out the workpieces on one hand, while simultaneously performing grinding on the other hand, thereby eliminating the above-mentioned drawbacks of the conventional art.

The present invention will be explained in detail below based on the illustrated embodiments. In the figure, reference numeral 1 denotes a polishing chamber 1 supported by a frame 35, and a rotating body 2 rotatable around a horizontal axis 3 is installed in the cleaning chamber 1. Reference numeral 4 denotes an electric motor having a built-in speed reducer, for example, for rotating the rotating body 2.

The rotary body 2 has three workpiece receiving recesses 5 extending at equal intervals on the circumferential surface thereof and extending in all axial directions and facing the workpiece loading/unloading station 7 and the two grinding stations 8 and 8a intermittently. are doing. The recess 5 has walls 12 parallel to the horizontal axis 3
and a side wall 11 disposed on the end face and perpendicular to the horizontal axis 3, and is open toward the outside in the radial direction of the rotating body 2. Among the recesses 5, those located at the polishing station 8, 8a form a cleaning space 10 with the inner wall of the cleaning chamber 1. The outermost peripheral wall 12a of the rotating body 2, together with the strip 40 disposed on the inner wall of the training room 1, forms a narrow gap 41 between the research bridge space 10 and the loading/unloading station 7, but it is completely sealed. For this purpose, an elastic packing may be disposed on the surface of the strip 40 and the packing may be brought into contact with the wall 12a. Note that the configuration of this portion is herein referred to as a shielding means. A sealed space 42 is defined within the rotating body 2 by being surrounded by the walls 12, 12a and the side wall 11. In the recess 5, which receives the workpiece 6, two workpiece gripping devices 13, 13a are arranged in this embodiment, which are aligned in the axial direction. Each workpiece gripping device 13, 13a consists of a presser member 14, 14a that is movable in the direction of the roll, and a presser member 15, 15a that is immovable in all directions. The holding members 15, 15a of both workpiece gripping devices 13, 13a aligned in the axial direction are exchangeably fixed to a common ratchet 16 rotatably supported by a bearing block 17 connected to the wall 12. be. The holding members 14, 14a are each exchangeably fixed to a shaft 18, and the shaft 18 is inserted into a bush 19 in such a manner that its rotation is restricted and the shaft can only be displaced in all directions.
Between the bush 19 and the pressing members 14, 14a,
A spring 20 is disposed on the shaft 18 to apply a biasing force to the end surface of the workpiece 6 in a direction that presses the holding members 14, 14a. The bush 19 is rotatably mounted on the side wall 11 of the rotating body 2. The outer end of the shaft 18 is provided with a collar 21 for operatively connecting the hold-down sections 14, 14a to a stationary actuating element 22 (for example a hydraulic cylinder) at the loading/unloading station. Said operative connection takes place in that the collar 21 engages in the groove 23 of the actuating element 22 during rotation of the rotating body 2 . In the sealed space 42, three shafts 24 are disposed which are supported by the side wall 11 and parallel to the horizontal shaft 3, and the shafts 24 are connected to the bush 19 and the shaft 16 via a transmission mechanism 25 such as a chain. ing. At one end of said shaft 24 a roller 26 is fixed, which is operatively connected to a drive mechanism 27 fixedly arranged for each station at the loading/unloading station 7 and at the polishing stations 8, 8a. Note that the driving wheel 27 and the roller 26 can be constructed as a friction wheel or a gear. The drive wheel 2
7 is preferably driven by an electric motor 28 with a reduction gear whose rotational speed is adjustable and whose direction of rotation is reversible. These shaft 24, transmission mechanism 25, drive mechanism 27, rotation mechanism 26, etc.
Since it is disposed within the sealed space 42 or outside the side wall 11, these can be protected from the adverse effects of the abrasive material being projected. The other end of the shaft 24 is provided with a control circle that co-operates with a control mechanism 30 (for example, a limit switch) in the loading/unloading station 7 in order to stop the workpiece gripping devices 13, 13a at a predetermined loading/unloading position. A plate 29 is fixed. Further, in the grinding stations 8 and 8a, a control mechanism 3 is provided which is turned on and off by a control disk 29 in order to control the movement of the workpiece 6 based on the grinding processing program.
0 is placed. A closing door 31 is provided at the top of the grinding chamber 1 for carrying in and out processed products.
1 can be provided with a lid that can be opened and closed as appropriate. 32
is an abrasive material projection device disposed on the side wall of the cleaning chamber 1 corresponding to each of the polishing stations 8 and 8a.

The bottom of the training room 1 is formed as a groove 33, and the groove 33
A screw conveyor 34 for discharging the abrasive particles and abrasive particles is disposed therein. The workpiece 6 is held in the recess 5 only by the end surface by the tips 36 provided on the presser members 14 and 15 (left side in FIG. 1), or the presser member 1
The end face and the cylindrical portion are held by gripping arms 37 provided on the workpieces 4a and 15a (right side in FIG. 1), and these are appropriately selected depending on the shape of the workpiece 6. To briefly explain the operation of the grinding device configured as described above, first, two processed products 6 are simultaneously inserted into the first recess 5 through the opening 31 in the loading/unloading station 7 using a loading device (not shown). The holding members 14, 14a, 1 of the workpiece gripping devices 13, 13a
5, 15a to grip and fix with elastic force.

Next, the rotating body 2 is rotated by 120° to send the workpiece 6 to the first polishing station 8, and at the same time the rolling element 26 is rotated by the driving element 2.
7 and rotating the workpiece 6, the workpiece 6 is polished by the abrasive material projected from the abrasive material projection device 32. At this time, a processed product can be loaded into the second recess 5 at the same time.
If the rotary body 2 is further rotated by 120 degrees, the workpiece 6 will become the second
It reaches a polishing station 8a, where it also undergoes a polishing process. At this time, the processed product can be loaded into the third recess 5 at the same time. When the polishing process is completed, the rotating body is rotated by 120 degrees again and the processed workpiece 6 is sent to the loading/unloading station 7. Here, the workpiece 6 is rotated again by the operation of the electric motor 28, and the abrasive material and abrasive particles remaining in the inner space of the workpiece 6 are discharged. The discharged grinding particles and grinding particles temporarily stay on the wall 12, but then they are transferred to the rotating body 2.
When it rotates, it is ejected into the domain 3-3. When the removal of the abrasive material, etc. is completed, the electric motor 28 is stopped using the control disk 29 and the control mechanism 30 so that the workpiece 6 comes to rest at a predetermined takeout and layer. After the workpiece is then gripped by an unloading device (which may be the same as the loading device, but is also not shown), the drive element 22 is actuated and the shaft 18 is moved by the spring 2.
The pressing force 14, 14a is displaced against a biasing force of 0.
After removing the workpiece 6 from the recess 5, the workpiece 6 is taken out, and the next workpiece is mounted on the workpiece gripping devices 13, 13a of the recess 5. Since the wall 12 is isolated from the shielding means disposed on the wall 12a, even while the workpieces are being installed and removed at the loading/unloading station 7, the polishing station 8.8a continues to perform polishing. Cleaning process can be carried out. Note that the workpiece receiving recess 5 provided in the rotating body 2
In this embodiment, there are three polishing stations, but it is also possible to use two, four or more polishing stations, and in that case, the number of polishing stations can be one or three or more.

In addition, if a lid such as a locking type is provided in the upper part of the upper part of the training room 1, the training material projection device 32 can be used even when the rotating body 2 is rotating.
There is no need to stop it. As described above, according to the present invention, in a grinding chamber having a workpiece loading/unloading station and a grinding station, the workpieces are sequentially moved between the two stations, and both stations are isolated from each other. Even when carrying in and out of processed products, the grinding process can be carried out continuously at the same time, reducing the cycle time for the grinding process.
This method has the remarkable effect of greatly improving productivity, simplifying the entire device, and greatly contributing to lower equipment costs.

In addition, the horizontal shaft 12 for intermittently rotating the rotating body and the shaft 24 for rotating the workpiece gripping device are disposed through the hollow part of the rotating body so that they are not exposed to the laboratory chamber. There is no collision with the abrasive material,
The durability of both wheels and bearings is greatly improved.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a sectional front view, and FIG. 2 is a sectional view of Rollo in FIG. 1. 1...Grinding room, 2...Rotating body, 3...
...Horizontal axis, 5...Concavity, 6...
Processed products, 7... Loading/unloading station, 8,8
a...Grinding station, 11...Side plate, 12...Wall, 13, 13a...Workpiece gripping device, 24... Axis, 25...
Transmission device, 32... Abrasive material projection device. ≧ Chicks *2 figures

Claims (1)

[Claims] 1. A machined piece support that is supported by a frame and fixed to a horizontal shaft that rotates intermittently at a set angle, and that is surrounded by a hollow wall surface parallel to the horizontal shaft and a side wall perpendicular to the horizontal shaft, and is open only in the radial direction. A cylindrical rotating body having a concave portion is disposed in a polishing chamber supported by a frame, and when the rotary body is stopped in the cleaning chamber, each work station is formed corresponding to each of the concave portions, At least one of the work stations is a workpiece loading/unloading station that can be opened to the outside, and at least one of the other work stations is
one is a grinding station, a shielding means is formed in the boundary area between the two stations between the outer periphery of the hollow wall of the rotating body and the inner wall of the grinding chamber, and a workpiece is rotatably supported in the recess. A workpiece gripping device is disposed in the hollow portion of the rotating body, and the horizontal shaft transmits power in conjunction with a driving means attached outside the grinding chamber to the intermediate portion of the horizontal shaft and the workpiece gripping device. A grinding device that penetrates the middle part of a shaft that is parallel to the shaft.