JPH0242624B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention belongs to the technical field of automatic grinding devices, and relates to an automatic grinding device for removing cast burrs.

(Prior art) Conventionally, an automatic grinding device for removing cast burrs has a cam plate 3.
Although it is a dimensional copying method, its processing capacity is low,
The structure is complicated, it is difficult to compensate for grinding wheel wear, and there are problems such as the inability to change the direction of burr generation, and improvements have been desired. However, the numerical control method, hydraulic tracing method, etc. are expensive, inevitably complicate the equipment, and have problems such as the time required for grinding.

(Object of the Invention) The present invention has been made in view of the problems existing in the above-mentioned prior art, and a swing mechanism is added to the cam plate two-dimensional copying method to remove burrs. It is an object of the present invention to provide an automatic grinding device for removing cast burrs, which has a simplified structure, increased capacity, easier maintenance, easier operation, and quick response to changes in workpieces.

(Structure of the Invention) In order to achieve the above object, the structure of the automatic grinding device for cast burr removal of the present invention is such that the automatic grinding device for cast burr removal of the present invention is directly connected to a motor and rotates around the fulcrum shaft by a first hydraulic cylinder via the fulcrum shaft. a first frame that supports the grindstone bending part and is slidable in the left-right direction guided by a first guide bar; a first sliding body that is slidable in the front-rear direction guided by a second guide bar that is provided in a frame and that intersects the first guide bar in a perpendicular direction; a left and right slide part having a copying roller attached thereto and pressed against the cam plate by a third hydraulic cylinder via the first frame; a second frame guided by a guide bar and moved back and forth by a third hydraulic cylinder; a second sliding body connected to the second frame by a screw shaft and directly connected to the third hydraulic cylinder; It has a front-rear sliding portion having a handle that interlocks with a screw shaft, a handle shaft that screws the handle and the first sliding body so as to be relatively movable in the left and right direction, and a fourth cylinder device that switches the cam plate. It is characterized by consisting of a cam plate switching section. Then, the cast burrs on the workpiece set on the jig are ground by a grindstone unit that has a mechanism that can move back and forth, move left and right, and rotate.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

As shown in FIG. 1, the automatic grinding device according to the present invention can be broadly divided into a grindstone deflecting portion 1 that gives a turning motion to a grindstone 5, and a roller 13 that engages a roller 13 following cam plates 16 and 16'. a left-right slide part 2 that moves the grindstone 5 in the left-right direction facing the workpiece 6; and a front-rear slide part 3 that moves the grindstone 5 in the front-rear direction with respect to the workpiece 6 and compensates for wear of the grindstone 6.
and a cam plate switching section 4 for switching the cam plates 16, 16'.

Hereinafter, details of each of the above-mentioned main parts will be explained with reference to FIGS. 2 to 5.

As mainly shown in FIG. 2, the grindstone turning unit 1 drives the fulcrum shaft 8 that supports the grindstone 5 together with its motor 7, and rotates the grindstone 5 by 90 degrees around the fulcrum shaft 8. The first hydraulic cylinder 9 is equipped with a first hydraulic cylinder 9 to Further, the distance between the grindstone center 5' and the work center 6' or the fulcrum shaft center 8' can be arbitrarily adjusted, so that changes in the vehicle type can be accommodated. However, the grindstone bending section 1 as a lever is supported by a first frame 10 that constitutes a left and right slide section 2.

As mainly shown in FIG. 3, the first frame 10 is guided by two first guide bars 11 bridged by a second frame 17, which will be described later, so that it can move in the left-right direction. There is. Two second guide bars 14 are bridged over the first frame 10 at positions perpendicular to the first guide bars 11, and a first sliding body 15 is attached to the second guide bars 14. It is slidably attached. The first sliding body 15 has a copying roller 13 at the tip extending in one direction in the left-right direction, and the copying roller 13 is attached to a support frame 31 (first
It is opposed to cam plates 16, 16' provided at the tip of the figure. The entire first frame 10 is connected to a second hydraulic cylinder 12 fixed to the second frame 17.
As a result, the copying roller 13 is pressed against the cam plates 16, 16'.

The second frame 17 constitutes the front and rear slide section 3, and is slidably attached to two third guide bars 18 disposed on the base 30, as shown in detail in FIG. is being used. This second
The frame 17 includes a screw shaft 21 and a second sliding body 2.
0 to a third hydraulic cylinder 19 provided on the base 30, the third hydraulic cylinder 19
It is designed to be driven in the front-back direction by the . Further, the screw shaft 21 is connected to a handle 24 via a sprocket 22, a chain 23, and a handle shaft 25. By turning the handle 24, the second frame 17 moves back and forth without operating the second sliding body 20, that is, the third hydraulic cylinder 19, and therefore moves the second frame 17 back and forth by the wear of the grindstone 5. By moving the grindstone 5, the wear of the grindstone 5 can be corrected.

However, when the handle 24 is turned to move the second frame 17 back and forth, the first sliding body 15 of the left and right sliding section 2 also moves, causing the positional relationship between the copying roller 13 and the cam plates 16, 16' to shift. Therefore, it is necessary to return the first sliding body to the extent that it has been moved back and forth. Therefore, handle shaft 2
5, and the first sliding body 15 is coupled to this handle shaft 25 via a screw member 26, as clearly shown in FIG. A circumferential groove 26a is provided on the outer periphery of the screw member 26, and the upper and lower projections 15a of the first sliding body 15 are slidably fitted into the circumferential groove 26a. As the handle shaft 25 rotates, the screw member 26 screws forward and backward on the handle shaft 25, and following this, the first sliding body 15 slides on the second guide bar 14, and the second frame 17 move back and forth in the opposite direction. Note that the first sliding body 15
As described above, since the first sliding body 15 must move in the left-right direction integrally with the first frame 10, the first sliding body 15 is provided with a long hole 15b to ensure relative movement with respect to the handle shaft 25. (Figure 3).

On the other hand, the two cam plates 16 and 16' are formed to have different cam surfaces according to the part to be ground of the workpiece 6, and are arranged perpendicularly to each other so that the bracket 3
It is fixed at 2. As shown in detail in FIG. 5, the bracket 32 is attached to a horizontal shaft 33 rotatably provided at the tip of the support frame 31, and this horizontal shaft 33 is attached to a fourth shaft 33 attached to the support frame 31. It is connected to the hydraulic cylinder 27 via a link 34. The bracket 32, the horizontal shaft 33, and the fourth hydraulic cylinder 27 constitute the cam plate switching section 4. When the horizontal shaft 33 is rotated by the fourth hydraulic cylinder 27, the bracket 32 rotates, and the cam plates 16, 16 are rotated. ' is positioned at a position facing the copying roller 13. The switching of the two cam plates 16, 16' is as follows:
This is done when the shapes of the parts to be ground of the workpiece 6 are different; when grinding parts of the same shape, there is no need to switch, and it is sufficient to use one cam plate.

Hereinafter, the operation of the automatic grinding device configured as described above will be explained with reference to FIG. 6 as well.

Figure 6 shows the locus of the grinding wheel center 5', the positional relationship between the fulcrum shaft center 8', the work center 6', and the cast burr 2.
8 states are shown. During grinding, the first hydraulic cylinder 9 tilts the grinding wheel 5 at 45 degrees with respect to the horizontal direction to position the grinding wheel center 5' at point A, and the second hydraulic cylinder 12
Pressure is applied to the copying roller 13 via the first frame 10 and the first sliding body 15, and the copying roller 13 is pressed against the cam plate 16 with a low constant pressure.
The second frame 17 is then moved forward by the third hydraulic cylinder 19. Then, the grindstone 5 first hits the point A of the workpiece 6, and then the roller 13 rolls along the cam surface of the cam plate 16, so that it hits the first point.
The sliding body 15 and the first frame 10 move laterally, and the grindstone center 5' moves from point A to point B, and grinding is performed during that time. Point B is the forward end of the first frame 10, that is, the grinding wheel 5, and at this position, the third hydraulic cylinder 19 is fixed,
Next, the first hydraulic cylinder 9 rotates the grindstone 5 by 45 degrees to a horizontal position. This rotation moves the grindstone center 5' from point B to point C, and grinding is performed during this period.

If the shape of the part to be ground of the workpiece 6 is different between the upper and lower sides, the grinding is temporarily stopped when the grinding wheel center 5' moves to point C, and the second frame is moved by the third hydraulic cylinder 19. 17 or grindstone 5
move back to its original position. At the same time, the first frame 10 is laterally moved by the second hydraulic cylinder 12, and the copying cam roller 13 is separated from the cam plate 16. Next, the bracket 32 is rotated by the fourth hydraulic cylinder 27 to move the cam plate from 16 to 1.
At the same time, the first hydraulic cylinder 9 rotates the grindstone 5 by 45 degrees in the opposite direction to position the grindstone center 5' at point D. Then, the second frame 17 is moved forward again by the third hydraulic cylinder 19. Then, similarly to the above, the copying roller 13 rolls on the cam plate 16, and the grindstone center 5' moves from point D to point E. When the grindstone 5 is turned by the first hydraulic cylinder 9 at the forward end, the grindstone center 5' moves from point D to point C, and the series of grinding of the cast burrs 28 is completed.

On the other hand, if the shape of the part to be ground of the workpiece 6 is the same on the upper and lower sides, the grinding wheel center 5'
When the cam plate 16 moves to point C, the grinding is continued without interrupting the grinding, that is, without switching the cam plate 16. When the grinding wheel center 5' reaches point E, the grinding wheel 5 is moved by the first hydraulic cylinder 9.
, and immediately thereafter, the third hydraulic cylinder 19 causes the grindstone 5 to retreat. As a result, the grindstone center 5' moves from point E to point D, and the series of grinding is completed.

Here, if the grindstone 5 is worn out and requires correction, the handle 24 is turned to move the second frame 17 forward by the amount of wear. At this time, handle shaft 2
5. The first sliding body 15 is moved back by the amount of the advance through the screw member 26, and the position of the copying roller 13 with respect to the cam plate 16 is adjusted.

Although the workpiece 6 shown in the above embodiment is a differential carrier, it goes without saying that the present invention can be widely applied to removing flash from casting materials.

(Effects of the Invention) As described above, according to the present invention, by adding the swing method to the cam copying method, the structure can be simplified and the cost reduced, and the parts that require maintenance adjustments can be avoided. It is possible to provide an automatic grinding device for removing cast burrs that has many excellent effects, such as a small amount of grinding, no special technology required, and easy correction of grinding wheel wear, which facilitates product accuracy control.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention. FIG. 1A is a front view, FIG. 1B is a side view, FIG. B is the second
Figure 3 is an enlarged side view showing the left and right slide parts, Figure 4 A is an enlarged partial plan view showing the front and rear slide parts, and Figure 4 B is a part of Figure 4 A. 4C is an enlarged partial sectional front view of the main part; FIG. 5A is an enlarged front view of the cam plate switching section;
FIG. 6B is a side view of FIG. 5A, FIG. 6A is an explanatory diagram of the operation, and FIG. 6B is an explanatory diagram showing flashing. 1... Grinding wheel bending part, 2... Left and right sliding part, 3
...Front and rear slide section, 4...Cam plate switching section, 5...
... Grindstone, 6 ... Workpiece, 7 ... Motor, 8 ... Fulcrum shaft, 9 ... First hydraulic cylinder, 10 ... First
frame, 11...first guide bar, 12...
...Second hydraulic cylinder, 13...Copying roller, 1
4...Second guide bar, 15...First sliding body, 16, 16'...Cam plate, 17...Second frame, 18...Third guide bar, 19...Third guide bar Hydraulic cylinder, 20... Second sliding body, 21
... Screw shaft, 24 ... Handle, 25 ... Handle shaft, 27 ... Fourth hydraulic cylinder.

Claims (1)

[Claims] 1. A grindstone deflection section having a grindstone directly connected to a motor and rotatable around the fulcrum shaft by a first hydraulic cylinder via a fulcrum shaft; a first frame provided so as to be slidable in the left-right direction while being guided by a guide bar; a second guide bar provided within the first frame and intersecting the first guide bar in a right angle direction; a first sliding body that is guided and slidable in the front-rear direction; and a first sliding body that is attached to the first sliding body and
A left and right slide part having a copying roller pressed against a cam plate by a second hydraulic cylinder via a frame, and a third guide bar that supports the grinding wheel bending part and the left and right slide part and is guided by a third guide bar. a second frame that moves back and forth by a hydraulic cylinder of 3;
a second sliding body connected to the second frame by a screw shaft and directly connected to a third hydraulic cylinder; a handle interlocking with the screw shaft; and a handle and the first sliding body relative to each other in the left-right direction. a front and rear sliding part having a handle shaft that is movably screwed together;
An automatic grinding device for removing cast burrs, comprising a cam plate switching section having a fourth cylinder device for switching the cam plate.