JP2747515B2 - Polishing machine - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polishing machine capable of efficiently polishing a ribbed mold having a plurality of polishing blocks, for example. (Prior Art) Japanese Patent Application No. 61-81573, filed by the same applicant as the present application, discloses a method in which one of two directions of XYZ is selected to set a processing surface of a work, and a first surface corresponding to the two directions is set. In addition, there is disclosed a polishing machine in which a grindstone is moved by a second driving means to polish a set processing surface. (Problems to be solved by the invention) However, according to this conventional polishing machine, for example,
When only the XYZ processing surface 14 of the die W with ribs as shown in the figure is continuously polished, the grindstone 51 is moved in the Z direction (up and down direction in the same figure) every time after moving over the rib to the next block. Therefore, it has been troublesome to reset the moving surface of the grindstone 51 many times by switching the switch. Also, when polishing this type of mold W with a conventional polishing machine,
When the polishing path of the grindstone 51 is stored in the teaching step, in the playback step, the grindstone 51 is reciprocated a predetermined number of times or time between the movement end position c and the start position a according to the stored data. It has become.
However, according to this, the moving path of the grindstone 51 includes a large number of non-polishing paths at portions corresponding to the ribs, so that there is a problem that the polishing time is wasted and the working efficiency is reduced. Configuration of the Invention (Means for Solving the Problems) In order to solve the above-mentioned problems, the first invention of this application uses the first and second driving means corresponding to two directions of XYZ to grind the grindstone. While moving and polishing the set processing surface, the third driving means corresponding to the remaining one direction is operated so that the grindstone is moved in the remaining one direction while maintaining the setting state of the setting processing surface. To provide a means for doing so. Further, the second invention of this application, in addition to the solution of the first invention, means for storing a moving path of the grindstone in the XYZ directions by the first, second, and third driving means in the teaching step, Means for designating a plurality of polishing blocks included in the set processing surface during the teaching step, means for setting the required number of movements or time of the grindstone in the playback step, and the grindstone remaining along the storage path during the playback step. Means for controlling the first, second, and third driving means so that each of the designated polishing blocks is moved in two directions by a set number of times or time before and after the movement in one direction. Things. (Operation) According to the solution of the first invention, when polishing a workpiece such as a mold with ribs, the third surface can be obtained without resetting the processing surface.
The driving means can be operated to move the grindstone in the third axial direction. According to the solution of the second invention, when performing playback polishing of a work having a plurality of polishing blocks, the grindstone moves a set number of times or time for each block, and after the polishing of the block is completed, Since the blocks are sequentially shifted, the number of movements of the non-polishing path between the blocks is reduced. (Embodiment) An embodiment in which the present invention is embodied in a mold polishing machine will be described below with reference to FIGS. As shown in FIG. 1, an X moving body 2 is provided on a frame 1 of the mold polishing machine so as to be movable in the left-right direction by an X motor 3 as first driving means. The body 4 is movably supported in the front-rear direction by a Y motor 5 as a second driving means. The Y moving body 4 is provided with a Z moving body 6 which can be moved up and down by a Z motor 7 as a third driving means, and a grinding wheel head 8 is attached to a lower end thereof. The grindstone head 8 includes a fixed bracket 9 and a rotation base 10, and a grinding wheel drive motor 11 is mounted on the rotation base 10. The grinding wheel drive motor 11 has an attachment 12 that converts the rotation of the motor 11 into a swing or transmits the rotation as it is, and has a plurality of concave polishing blocks A on its output shaft.
A grindstone 13 for polishing a mold W with ribs as a workpiece having the shape E is fixed. And the grindstone 13 is the mold W
In the position corresponding to each of the polishing blocks A to E, the rotation of the grinding wheel drive motor 11 causes the first
It is swung in the horizontal direction in the figure. As shown in FIGS. 1 and 2, between the fixed bracket 9 and the rotating base 10, the rotating base 10 is rotated in a vertical plane,
A pressurizing cylinder 15 for pressing and releasing the grindstone 13 from the XY processing surface 14 of each of the polishing blocks A to E is provided. A stop screw 16 is provided on the fixing bracket 9 so as to be adjustable in position. As shown in FIG.
The grindstone 13 is engaged with the rotation base 10 at the time of the projecting operation of 15 to hold the grindstone 13 at an intermediate position in the polishing block A in the Z direction (vertical direction in the figure). Therefore, Z of the grinding wheel head 8
When changing the polishing block A by moving in the direction, the grindstone 13 can enter the next polishing block B without colliding with the mold W. As shown in FIG. 4, a control panel 17 attached to the frame 1 has a mode selection switch 18 for selecting any one of a manual polishing mode, a teaching mode, and a playback mode, and a mode selection switch XYZ. A machining surface setting switch 19 for selecting one of the two directions to set the machining surface of the mold W, and a number setting device 20 (moving time setting) for setting a required number of movements of the grindstone 13 in the playback process. Input switches such as a start switch 21 for starting a teaching or playback process, and an end switch 22 for completing each process. As shown in FIG. 1, a portable remote control teaching device 24 is connected to the control panel 17 via a cable 23. The device 24 includes an operation lever 25 capable of tilting operation in a range of 360 degrees, and a tilting direction and a tilting amount of the operating lever 25 are controlled by a first axis encoder 26 and a second axis encoder 27 disposed in the device 24.
(See FIG. 4). The teaching device 24 has a third axis switch
For example, as shown in FIG. 2, the third axis switch 28 is operated while the grindstone 13 is polishing the XY processing surface 14 set by the processing surface setting switch 19. The Z motor 7 is driven to
13 is moved in the Z direction. In addition, the teaching device 24
Are provided with a designation start switch 29 and a designation end switch 30 for designating a movement start end position and a movement end position for each polishing block in the mold W in the teaching step. These switches are connected to the input side of a CPU 31 provided in the control panel 17. On the output side of the CPU 31, the X, Y,
Z, a valve 34 for controlling the operation of each of the motors 3, 5, 11 for driving the grinding wheel and the pressurizing cylinder 15 are connected, and a drive and stop signal is output from the CPU 31 to these. . Further, the CPU 31 includes a ROM 32 for storing a program for controlling the operation of the entire die polisher, and a RAM 33 as storage means for rewritably storing the movement path of the grinding wheel 13 in the XYZ directions during the teaching process. It is connected. Next, a description will be given of an operation of polishing the die W with ribs having a plurality of polishing blocks A to E by the die polisher having the above-described configuration with reference to a flowchart shown in FIG. First, the teaching mode is selected by the mode selection switch 18 (step S1), and then, two axes X and Y are selected by the processing surface setting switch 19, and each of the polishing blocks A to
The XY processing surface 14 of E is set (step S2), and then the start switch 21 is operated (step S3) to start the teaching process. As shown in FIG. 1, the grindstone 13 is moved to the first polishing block A.
The grinding wheel drive motor 11 is started in a state where it is pressed against the XY processing surface 14 by the pressing cylinder 15. And
Operate the designation start switch 29 of the teaching device 24 (third
After the operation lever 25 is tilted in a desired direction after (point a in the figure), detection signals corresponding to the tilt direction and the tilt amount are output from the encoders 26 and 27 to the CPU 31. Drive signals are output from the CPU 31 to the X and Y motors 3 and 5 based on the detection signals, and the grindstone 13 moves along a desired polishing path in the X and Y biaxial directions with the rotation of each of the motors 3 and 5. As well as
The movement path data of the polishing block A is stored in the RAM 33 based on the operation of the designation end switch 30 (point b in FIG. 3) (step S4). When the grinding wheel 13 is moved to the next polishing block B after the teaching of the polishing block A is completed, the rotating base 10 is brought into contact with the stop screw 16 by operating the pressurizing cylinder 15 as shown in FIG. After the grinding wheel 13 is disengaged from the XY processing surface 14, the grinding wheel 13 is taken out of the block A, and the third axis switch 28 is operated in this state. Then, at the time of setting the XY processing surface 14, the Z motor 7 is started, the grindstone 13 is arranged at a position facing the next polishing block B, and the movement path data of the grindstone 13 at that time in the third axial direction is stored in the RAM 33. Is performed (step S5). In this way, when the polishing block is moved, the grindstone 13 can be easily moved in the third axis direction by operating the third axis switch 28 without resetting the processing surface. When the above operation is repeated and the teaching of all the polishing blocks A to E is completed and the end switch 22 is operated (step S6), the playback mode is set by the mode selection switch 18 (step S7). ). After setting the required number of movements of the grinding wheel 13 by the number setting device 20 of the control panel 17 (step S8), the start switch 21
Is operated (step S9), the moving path data of the RAM 33 stored for each polishing block in the teaching step is sequentially read, and the X, Y motors 3, 5 are read out based on the data.
Is driven, as shown in FIG. 3, the grindstone 13 is reciprocated a predetermined number of times on the XY processing surface 14 for each of the polishing blocks A to E (step S10).
The motor 7 is driven to move the grindstone 13 in the third axial direction (Step S11). When these operations are repeated and a plurality of block polishing operations are sequentially completed, an end signal is confirmed (step S12), and the polishing operation of the XY processing surface 14 of the mold W ends. Therefore, if a workpiece such as a mold W with ribs having a plurality of polishing blocks is machined by the above-described playback polishing, the conventional movement between the end position and the start position (a in FIG. 3).
The number of times that the grindstone 13 moves on the non-polishing path (shown by a broken line in FIG. 3) corresponding to the rib of the mold W is smaller than the method in which the grindstone is reciprocated a set number of times between the point and the point c). Since it is reduced, the processing efficiency can be further improved without wasting time. In this mold polishing machine, a manual polishing mode can be set by the mode selection switch 18 (step S13), and the mold W can be processed by manual operation. FIG. 6 shows another example of the grindstone head 8. A pressure cylinder 36 for pressing the grindstone 13 against the oblique XY processing surface 14 is attached to the bracket 35. With the movement in the direction (the left-right direction in the figure), the grindstone 13 can polish the processing surface 14 while moving on the main body side of the pressure cylinder 36. In this configuration, the pressure cylinder is
If the effective stroke exceeds the effective stroke 36, the Z-axis motor 7 is driven to move the grinding wheel head 8 up and down by operating the third axis switch 28 described above. Can be effectively operated to polish the inclined processing surface over a wide range, and the teaching process of the oblique XY processing surface 14 can be performed smoothly without a break. Effect of the Invention As described in detail above, according to the first invention, the grinding wheel can be moved to the third position by operating the third driving means without resetting the processing surface.
Since the workpiece can be moved in the axial direction, an excellent effect of improving the operability when polishing a workpiece such as a mold having a rib or a mold having a step portion and a groove portion is exhibited. Further, according to the second aspect, the teaching process of the inclined polishing surface can be smoothly performed without a break, and the grindstone is set for each block when performing the playback polishing of the work having the plurality of polishing blocks. After moving the number of times or time, and sequentially moving to the next block after completing the polishing of the block, the number of times of moving the non-polishing path between each block is reduced, and the polishing operation can be performed efficiently. .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a mold polishing machine showing one embodiment of the present invention, FIG. 2 is an enlarged front view of a grinding wheel head,
FIG. 3 is a plan view for explaining the block polishing operation, FIG. 4 is a block diagram schematically showing a control circuit, FIG. 5 is a flowchart showing the operation, and FIG. 6 is a front view showing another example of the grinding wheel head. FIG. 7 is a cross-sectional view for explaining a conventional polishing method. X motor 3 as first driving means, Y motor 5 as second driving means, Z motor 7 as third driving means, grinding wheel
13, processing surface 14, number setting device 20 as setting means, third axis switch 28, designation start switch 29 as designation means, similarly setting end switch 30, CPU 31 as control means, RAM 33 as storage means, polishing block A to E, mold W as work.

Claims (1)

(57) [Claims] Select one of the two directions of XYZ to set the machining surface (14) of the work (W), and set the first surface corresponding to the two directions.
And a polishing machine configured to move the grindstone (13) by the second drive means (3, 5) to polish the set processing surface (14).
Means for operating the third driving means (7) corresponding to the remaining one direction so that the grinding wheel (13) is moved in the remaining one direction of XYZ while maintaining the setting state of 4). (28)
A polishing machine comprising: 2. Select one of the two directions of XYZ to set the machining surface (14) of the work (W), and set the first surface corresponding to the two directions.
And a polishing machine configured to move the grindstone (13) by the second driving means (3, 5) to polish the set processing surface (14). (1
Means for operating the third driving means (7) corresponding to the remaining one direction so that the grinding wheel (13) is moved in the remaining one direction of XYZ while maintaining the setting state of 4). (28)
Means (33) for storing the moving path of the grinding wheel (13) in the XYZ directions by the first, second and third driving means during the teaching step; and the setting processing surface (14) during the teaching step. Means (29, 30) for designating a plurality of polishing blocks (A to E) included in the method, means (20) for setting the required number of movements or time of the grindstone (13) in the playback step, At the time of the playback step, the whetstone (13) is moved in the two directions by the set number of times or for each designated polishing block before and after the movement in the remaining one direction according to the storage path. 1. A polishing machine comprising: means (31) for controlling second and third driving means.