JPH05138517A - Position setting method for wheel spindle stock in double-headed grinder - Google Patents

Abstract

PURPOSE:To simplify a previous method in which respective position settings are set by means of a movement quantity between respective positions in the case of both right and left grinding and dressing positions being different at a double-headed grinder whose wheel spindle stocks have grinding positions and dressing positions. CONSTITUTION:Grinding positions are manually set from dressing positions, and then, actual machine grinding size confirmation is conducted, and deviations to M 1 = a work size value, N 1=M/C supposition center are each subjected to program settings, and at the same time the above respective wheel spindle stock positions are memorized 2) in the case of grinding positions being changed, wheel spindle stock positions can be set by means of the work size value by conducting the change as left-C-N right-C'-(M-N).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for setting a grinding position after a grindstone is corrected in a CNC double head grinding machine.

[0002]

2. Description of the Related Art FIG. 2 is a front view of a CNC double-headed grinder. On the machine base 1 are grindstones 3L and 3R having disk-shaped grindstones 2L and 2R facing the grinding action surfaces of the end faces.
It is engaged with the machine base 1 so that the space between the 2R grinding working surfaces can be adjusted. Each machine base 1 has a numerically controlled servo motor 4
L, 4R are provided, and the output shafts of these servomotors 4L, 4R are grindstones 3L, 3 by screw feed devices 5L, 5R.
It is connected to R. The servomotors 4L and 4R are controlled by a numerical controller (CNC) 6 which is an electronic computer. The workpiece W is moved in the crossing direction of the paper surface of the drawing by the feeding device (not shown) provided on the table 7 on the machine base 1 so that both sides WC and WR of the workpiece W are both grinding wheels 2L and 2L.
It is ground by the grinding action surface of the end surface of R. Whetstone 2L, 2
In R, the grindstone bases 3L and 3R are retracted to a predetermined position, and the end surface, that is, the grinding action surface is dressed by a grindstone correction device (not shown). The movement of the grindstone bases 3L and 3R is performed by driving the servomotors 4L and 4R by the numerical control device 6 and the screw feeding devices 5L and 5R.

FIG. 3 shows a conventional grinding position setting method. FIG. 3A shows a state in which both grindstones 2L and 2R are at the grindstone correction position (0), and FIGS. 3B and 3C show a state in which both grindstones 2L and 2R are at different grinding positions (1) and (2). The setting of the grinding position is (1) Manually move from the grinding wheel correction position of FIG. 3A to the grinding position of FIG. 3B by setting the left grinding wheel head 3L to the length L1 and the right grinding wheel head 3R to the length R.
After moving forward by 1 and setting the grinding position, the workpiece W is ground by an actual machine to check the dimensions, and the moved lengths L1 and R2 are set as programs. (2) The grinding position is changed from (1) in FIG. 3B to (2) in FIG. 3C.
When changing to, the lengths L1 and R1 moved from the grindstone correction position to the grinding position are changed to L2 and R2, respectively. (3) Changing the grinding positions (1) and (2) is as shown in Fig. 3B.
Is to change the workpiece size M1 of FIG. 3C to M2 of FIG. 3C, but the wheel head positions are subtracted from the dimensions M1 and M2 of the workpiece W respectively to calculate the moving lengths L2 and R2, or After indexing the wheel head position later, set the program.

[0004]

Generally, the grinding wheel head positions of the above-mentioned double-headed grinding machine have a grinding position and a correction (dress) position, and if the left and right grinding wheel heads have different grinding / correction positions, each position is different. The setting was set by the amount of movement between each position. That is, it was determined by the moving length between the grinding position and the whetstone correction position.
For this reason, when changing the moving length of the grinding wheel head between the current grinding position and the grinding wheel correction position, it is necessary to calculate together with the dimensional difference of the workpiece. Therefore, if the grinding position is set from the whetstone correction position, it is necessary to perform actual machine grinding each time to check the dimensions.

It is an object of the present invention to provide a method of setting a grinding position in a double-sided grinder, which can easily find the length of movement of the grindstone to the grinding position by providing a virtual center of the machine. .

[0006]

SUMMARY OF THE INVENTION According to the present invention, a grindstone for a numerically controlled double-sided grinder that takes a grinding wheel correction position in which both grinding wheel heads are retracted and a grinding position in which both grinding wheels are advanced and moves the grinding wheel after grinding wheel correction to the grinding position. In the position setting method, (1) after manually setting the grinding position from the grindstone correction position, the actual machine grinding dimension is confirmed by grinding, and the workpiece dimension value M1 and one of the appropriately determined virtual machine center The deviation N1 of the grindstone to the grinding surface is programmed and the position of each grindstone is stored in memory. (2) Difference L1 = C-N1 between grinding position of one wheel head and grinding wheel correction position, difference R1 = C '-(M1-N1) C = L1 + N1 C'from grinding position of another wheel head and grinding wheel correction position = R1 + (M1-N1) where C and C '= distance from the virtual center of the machine to each grinding wheel grinding operation surface at the grinding wheel correction position is calculated and stored. (3) When changing the grinding position to the machining dimension M2 of another workpiece and the deviation N2 from the virtual center of the machine to the grindstone grinding surface of one grindstone, change the program setting to M1 → M2, N1 → N2, The difference L2, R2 between the grindstone correction position and the grindstone position between the grinding position is L2 = C-N2 R2 = C '-(M2-N2) The double-sided grinder is characterized by setting the grinding position. This is the method of setting the grinding position in the.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the relative positions of the grindstones, and the grindstones 2L and 2R are the grindstones 2 in the double-sided grinder shown in FIG.
L and 2R. Hereinafter, description will be made with reference to FIGS. 1 and 3.
1A shows a grindstone correction position (0), FIG. 1B shows a grinding position (1), and FIG. 1C shows a second grinding position (2).
It shows that R is located. The grindstones 2L and 2R move as the grindstone bases 3L and 3R move by the servomotors 4L and 4R controlled by the CNC control device 6 driving the screw feeding devices 5L and 5R.

The setting of the grinding position of the present invention is performed as follows. Grinding position (1) in FIG. 1B from the whetstone correction position in FIG. 1A
After manually setting, the grinding dimensions are confirmed by grinding, and the deviation of the workpiece dimension value M1 and an appropriately determined one from the machine virtual center M / C, for example, the grinding action surface of the grindstone 2L on the left side. N1 is programmed respectively and the position (1) of each of the above-mentioned grindstones is memorized. Difference L between the grinding position of one wheel head 2L and the grinding wheel correction position
1 = C-N1 Difference between the grinding position of the other wheel head and the grinding wheel correction position R1 = C '-(M1-N1) C = L1 + N1 C' = R1 + (M1-N1) where C, C '= machine virtual hole center Distance from M / C to each grinding wheel grinding action surface at the grinding wheel correction position. When changing the deviation of the grinding position from the machining size M2 of another workpiece to the virtual machine center M / C to the grindstone grinding surface of one grindstone 2L to N2, change the program setting to M1 → M2, N1 → N2. , L2, R2, which is the difference between the grindstone position and the grindstone correction position, is set by finding L2 = C-N2 R2 = C '-(M2-N2).

That is, generally, when the grinding positions of the left and right grindstones 2L and 2R are changed to C-N and C '-(M-N), the grinding positions can be set to the workpiece size. In the above, the machine virtual center M / C can be arbitrarily selected.

[0011]

INDUSTRIAL APPLICABILITY As described above, the present invention has the machine virtual center M /
Assuming C, the grinding position is obtained by using the grinding wheel correction position and the distances C and C ′ from the virtual center of the machine. Therefore, even if the grinding positions and the correction positions of both grinding stone heads are different, the grinding process is performed. There is an effect that the grinding position can be easily determined by setting the dimension value of the object.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment.

FIG. 2 is a front view of a double-sided surface grinder.

FIG. 3 is a plan view of a conventional example.

[Explanation of symbols]

 M1 Workpiece size N1 Unbalanced M2 Processing size of other workpieces N2 Unbalanced M / C Virtual machine center 2L Grindstone 2R Grindstone

Claims (1)

[Claims] 1. A grinding wheel position setting method for a numerically controlled double-headed grinder in which a grinding wheel correction position in which both whetstone heads are retracted and a grinding position in which both whetstone heads are moved forward is taken and the whetstone after grinding wheel correction is moved to the grinding position. 1) After manually setting the grinding position from the grindstone correction position, grinding is performed to check the actual machine grinding dimension, and the workpiece dimension value M1 and an appropriately determined grinding action surface of one grindstone from the virtual machine center The deviation N1 is set in each program, and the positions of the respective grindstones are stored in memory.
(2) Difference L1 between the grinding position of one wheel head and the grinding wheel correction position
= C-N1, the difference between the grinding position of the other wheel head and the grinding wheel correction position R1 = C '-(M1-N1) C = L1 + N1 C' = R1 + (M1-N1) where C, C '= from the virtual center of the machine The distance to each grinding wheel grinding surface at the grinding wheel correction position is calculated and stored. (3) To change the grinding position to the machining size M2 of another workpiece and the deviation N2 from the virtual center of the machine to the grinding surface of one grindstone, the program setting is changed to M1 → M2, N1 → N2. The difference L2, R2 between the grindstone correction position and the grindstone position between the grinding position is L2 = C-N2 R2 = C '-(M2-N2) The double-sided grinder is characterized by setting the grinding position. Setting method of grinding position in.