JPH0319030B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a grinding device that simultaneously grinds two opposing sides of four sides of a workpiece having a rectangular planar shape.

In recent years, in fields such as the mechanical and metal industry and the electronics industry, two opposing sides of a workpiece can be simultaneously processed with high precision.
A grinding machine that performs grinding with high efficiency is equipped with a pair of movable tables each having a rotatably attached shaft to which a grinding wheel is fixed.
A double-head surface grinder is used that grinds both sides of the workpiece by passing the workpiece held on a carrier plate between two grinding wheels.

As the double-headed surface grinder, for example, Japanese Patent Application Laid-Open No. 1986-
There is a configuration as described in the 102685 publication.

By the way, when grinding the four sides of a workpiece whose planar shape is rectangular, two double-headed surface grinders as described above are installed, and first, both opposing sides are ground by the first double-headed surface grinder, and then the workpiece to the second
An operator supplies the material to a double-headed surface grinder to grind both sides perpendicular to the previously ground surface.

Therefore, grinding work is inefficient and
There was a problem in that an operator had to be present at the grinding machine at all times to transfer workpieces.

The present invention solves the above-mentioned problems of the grinding operation and provides a grinding device that can automatically grind four sides of a workpiece having a rectangular planar shape.

(Means for Solving the Problems) That is, the present invention allows a workpiece having a rectangular planar shape to be held by a carrier plate to pass between the grinding surfaces of two grindstones, and to A first double-headed surface grinder that grinds both sides of the workpiece and a second double-headed surface grinder that grinds the other opposite sides of the workpiece are installed at a predetermined interval,
Between the first double-head surface grinder and the second double-head surface grinder, from the workpiece delivery part of the carrier plate in the first double-head surface grinder to the workpiece insertion part of the carrier plate in the second double-head surface grinder. The present invention provides a grinding device equipped with a transfer means for transferring the workpiece while rotating it horizontally by 90 degrees.

(Example) The configuration of a grinding device of the present invention will be explained based on the drawings.

1 is a first double-head surface grinder, and 2 is a second double-head surface grinder. 3 is a first carrier plate, and 4 is a second carrier plate. 5
is the means for supplying the workpiece. 6 is a first insertion/extraction means, and 7 is a second insertion/extraction means.
8 is a transshipment means, and 9 is a conveyor for taking out the workpieces.

The first and second double-head surface grinders 1 and 2 are as shown in FIG. 3, and a shaft 11 has a grinding wheel 10 attached to one end and is rotatably attached to a movable base 12 via a bearing.
, a fixed table 13 on which the movable table 12 is placed, and the like.

As shown in FIG. 2, the above-mentioned shaft 11 has a pulley 16 attached to its end, and rotation is transmitted via a belt 18 by a pulley 17 attached to the output shaft of the electric motor 15.

Furthermore, the movable base 12 is movable along an arcuate guide formed on the contact surface with the fixed base 13, and the fixed base 13 is movable along a guide protrusion formed on the machine frame 40. , and is fixed in a predetermined position by a screw 14. Therefore, by moving the movable table 12 and the fixed table 13, the opposing angle θ of the grindstone 10 and the distance a
can be changed.

The configuration of the first and second carrier plates 3 and 4 is as shown in FIG.
A plurality of recesses 3a and 4a are respectively formed for inserting. Then, the recess 3 is driven by the drive device 20.
It is intermittently rotated by pitches a and 4a, and the recess 3
The workpiece 50 inserted into the grinders 1 and 4a is passed between the grinding surfaces formed by the grinding wheels 10 of the double-headed surface grinders 1 and 2.

As shown in FIG. 4, the workpiece supply means 5 includes a conveyor 21 having a guide plate 21a for guiding the workpiece, and a pair of chucks 22 that move the chucks 22 in a vertical state. A holder 23 connected to a movable arm 24 and a drive device 25 for rotating the arm 24 grips the workpiece 50 on the conveyor 21 and inserts the insertion shutter 26 of the first insertion/removal means 6. It is now being transshipped to

The first insertion/extraction means 6, as shown in FIG.
Insertion shooter 26 having a groove for guiding the workpiece
, a delivery shutter 27 disposed on the same axis with the first carrier plate 3 in between, and a pair of claws 29 are installed, and are reciprocated by a drive device 30 formed by a liquid cylinder, a link mechanism, etc. The workpiece 50 at the insertion position of the insertion shutter 26 is inserted into the recess 3a of the first carrier plate 3 by the claw 29, and
The workpiece 50 in the recess 3a is pushed out to the delivery chute 27. Also, supply means 5
When the workpiece 50 is fed to the insertion shutter 26 by the chuck 22 and when the workpiece 50 is taken out from the delivery shutter 27, the claw 29 is rotated upward so as not to get in the way.

The second insertion/extraction means 7 has a conveyor 9 installed in place of the delivery shutter of the first insertion/extraction means 6, and is positioned at the insertion position C of the shutter 31 by a claw 33 attached to a shaft body 32. The workpiece 50 is placed in the recess 4a of the second carrier plate 4.
4a, and the workpiece 50 located within the 4a.
It is adapted to push out the material onto a conveyor 9 which is a taking-out means.

The details of the transshipment means 8 are as shown in FIG. 6, and include an arm 34 having a chuck 36 attached to its end and rotating around a shaft 35, a fluid cylinder, or an electric motor, a rotary cam, a fluid cylinder, and a link mechanism. The chuck 36 is moved horizontally and vertically to grip the workpiece 50 at the delivery position of the first carrier plate 3 and transfer it to the second carrier plate 4. It is designed to be transshipped to insertion position C.
Further, the shaft 35, which is the center of rotation of the arm 34, is the seventh
As shown in the figure, the first carrier plate 3 is rotated through 90 degrees while the workpiece is being moved from the delivery position B of the first carrier plate 3 to the insertion position C of the second carrier plate 4. The straight line X passing through the center point of the workpiece 50 and corner points P1 and P4 at the workpiece delivery position B, and the workpiece insertion position C on the second carrier plate The chuck 36 is installed at the intersection point Q of the straight line Y passing through the center point of the workpiece 50, and the chuck 36 grips the side surface of the workpiece by opening and closing the gripping claws by the retracting and retracting movement of the piston rod of a fluid cylinder (not shown). It is formed like this.

The conveyor 9 for removing the workpieces can also be formed by an inclined tray.

Each of the above-mentioned devices is operated based on signals from a control device having an operation setting circuit, a memory circuit, a comparison calculation circuit, an operation command circuit, and the like.

When grinding a workpiece using the above-mentioned grinding device, first, set and input a predetermined operation order, operation time, etc. to the control device (not shown), and then Each fixed base 13 of the panel is attached to the machine frame 4
The machine is moved along the guide and fixed at the preset grinding width position of the workpiece.

Next, the movable table 12 is rotated along the guide of the fixed table 13 and fixed at a position where a preset grinding depth is obtained, and the workpiece 50 is prepared at a predetermined supply position.

Once these preparations are complete, start the grinding equipment,
The workpieces 50 are fed one by one onto the supply conveyor 21 and conveyed along the guide plate 21a. When the workpiece 50 comes to the transfer position, the drive device 25 of the workpiece supply means 5 is activated to rotate the movable arm 24 to move the chuck 22 to the position of the workpiece 50, and also to move the chuck 22 to the position of the workpiece 50. The workpiece 50 is grasped by opening and closing the grasping claws. Next, the drive device 25 operates to rotate the movable arm 24, and transfer it to the insertion position A of the insertion shooter 26 of the first insertion/removal means 6. When the transfer operation is completed, the drive device 25 is operated to rotate the movable arm 24 and return the chuck 22 to the standby position.

During the transshipment operation described above, the next workpiece 50 is fed onto the conveyor 21.

Place the workpiece 5 in the insertion position A of the insertion shooter 26.
0 is placed, the drive device 30 of the first insertion/removal means 6 operates to rotate the shaft body 28 and move the claw 29 which was in the standby position onto the insertion shooter 26 to remove the workpiece 50. It is located between the claws 29. Next, the shaft body 28 is moved backward, and the workpiece 50 is
into the recess 3a of the first carrier plate 3. When the claw 29 retreats to a predetermined position, the drive device 30 is operated to project the insertion claw 29 together with the shaft body 28 and rotate it back to the standby position.

When the workpiece insertion operation is completed, the workpiece 50 on the conveyor 21 is transferred to the insertion position A of the insertion shooter 26 by the chuck 22 of the supply means 5.

During this operation, the first carrier plate 3 is rotated by one pitch, and the next recess 3a is inserted into the insertion shutter 2.
6. When the recess 3a moves to a predetermined position and stops, the first insertion/removal means 6 operates to retreat the pawl 29 and remove the workpiece 50.
into the recess 3a.

While repeating this operation sequentially, the workpiece 50 inserted first passes through the grinding position of the grinding wheel 10 of the first double-headed surface grinder 1, and the rotating grinding wheel 10 grinds the workpiece. 50 side surfaces 50a, 50
b is ground at the same time.

When the above-described operation is repeated and the first carrier plate 3 is intermittently rotated, the recess 3a into which the ground workpiece 50 is inserted moves to a position facing the delivery shutter 27. The processed workpiece 50 in the recess 3a is pushed out by the claw 29 of the first insertion/extraction means 6, and the workpiece 50 in the insertion shooter 26 is pushed out of the recess 3a.
inserted into.

The processed workpiece 50 is transferred to the feed-out shooter 27
When the chuck 36 is pushed out, the drive device (not shown) of the transfer means 8 is activated to rotate the arm 34 and move it upward, and the chuck 36 is moved to the delivery position of the delivery chute 27 where the workpiece is located. move it.
Next, the chuck 36 is lowered and the gripping claws are opened and closed to grip the workpiece 50. Subsequently, the arm 34 is raised and rotated, and the chuck 36 is moved to the insertion position C of the insertion shutter 31 of the second insertion/removal means 7.

While the chuck 36 moves from the delivery position B of the first insertion/extraction means 6 to the insertion position C of the insertion shutter 31 of the second insertion/extraction means 7,
Rotate 90° horizontally.

When the chuck 36 moves to the insertion position H of the insertion shooter 31, the chuck 36 is lowered and the gripping claws are opened to place the workpiece 50 on the insertion shooter 31. Next, the second insertion/extraction means 7 operates to rotate the insertion claws 33 together with the shaft 32, position the workpiece 50 between the claws 33, and insert it into the recess 4a of the second carrier plate 4. . When the claw 33 protrudes to a predetermined position, it retreats and rotates to return to the standby position. During this time, the second carrier plate 4 is rotated by one pitch.

Simultaneously with the workpiece insertion operation on the second carrier plate 4 described above, the feeding of the processed workpiece and the insertion operation of the unprocessed workpiece are performed on the first carrier plate 3, and the first insertion/removal operation is performed. The processed workpiece 50 is placed at the delivery position B of the means 6.
is being sent. Therefore, while the second carrier plate 4 is rotating by one pitch, the workpiece 50 at the delivery position B of the first insertion/extraction means 6 is transferred to the insertion position C of the second insertion/extraction means 7 by the transfer means 8. Can be transshipped.

In the second carrier plate 4, the workpieces 50 are sequentially inserted into the recesses 4a, and as in the case of the first carrier plate 3, the opposing sides are ground at the same time.

When the workpiece 50, whose side surfaces have all been ground by the above-described operation, moves to a position facing the conveyor 9, the claw 33 of the second insertion/extraction means 7 moves the processed workpiece 50 in the recess 4a onto the conveyor 9. 9 and the insertion shooter 31
The workpiece 50 located at is inserted into the recess 4a.
Further, the workpiece 50 sent to the conveyor 9 is conveyed to a stocker (not shown) or the like.

(Effects of the Invention) As described above, the present invention allows a workpiece having a rectangular planar shape to be held by a carrier plate to pass between the grinding surfaces of two grindstones, and to A first double-headed surface grinder that grinds the workpiece and a second double-headed surface grinder that grinds the other opposite sides of the workpiece are installed at a predetermined interval, and the first double-headed surface grinder and the second Between the two double-head surface grinders, the workpiece is transferred horizontally from the workpiece delivery part of the carrier plate in the first double-head surface grinder to the workpiece insertion part of the carrier plate in the second double-head surface grinder. Since the transshipment means for transshipment is provided in a rotated state, the following effects can be achieved.

(1) The entire grinding device can be made compact by providing a means for rotating the workpiece by 90 degrees and transferring it between the first double-head surface grinder and the second double-head surface grinder.

(2) Since the supply position of unprocessed workpieces and the delivery position of processed workpieces can be placed on the same work surface, it is easy to connect the supply line and discharge line of workpieces. Full automation can be achieved.

(3) By simply setting the distance between the grinding wheels in the first and second double-head surface grinders and supplying the workpiece, it is possible to automatically grind the four sides of a workpiece having a rectangular planar shape.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view showing one embodiment of the grinding device of the present invention. FIG. 2 is a schematic plan view of FIG. 1. FIG. 3 is an enlarged view of section A in FIG. 2. FIG. 4 is an enlarged view of section B in FIG. 1. FIG. 5 is an enlarged view of section C in FIG. 1. FIG. 6 is an enlarged view of section D in FIG. 1. FIG. 7 is a schematic diagram showing the transshipment situation of the workpieces. DESCRIPTION OF SYMBOLS 1: First double-head surface grinder, 2: Second double-head surface grinder, 3: First carrier plate, 4: Second carrier plate, 5: Workpiece supply means, 6:
First insertion/extraction means, 7: Second insertion/extraction means,
8: Transloading means, 9: Unloading conveyor.

Claims (1)

[Claims] 1. A first double-headed surface grinder that grinds both opposing sides of the workpiece by passing a workpiece having a rectangular planar shape while being held by a carrier plate between the grinding surfaces of two grinding wheels; A second double-headed surface grinder for grinding other opposite sides of the workpiece is installed at a predetermined interval, and a first double-headed surface grinder is installed between the first double-headed surface grinder and the second double-headed surface grinder. The workpiece is horizontally transferred from the workpiece delivery part of the carrier plate in the surface grinder to the workpiece insertion part of the carrier plate in the second double-head surface grinder.
A grinding device characterized by being provided with a transshipment means for transshipment while being rotated by 90 degrees.