JPH07108442A - Positioning method and device for worked member of platelike material working machine - Google Patents

Abstract

PURPOSE:To remove the movement error of a worked member and realize precise positioning by recording the positioning error data of the worked member beforehand, correcting a command movement distance on the basis of the error data, and outputting a corrected command movement distance as the movement signal of the worked member. CONSTITUTION:In the case of a chamfering machine for plate glass, the actual movement distance of a chamfering grinding wheel is detected by measuring by means of a detecting means 50 the movement distance of slidable movement frame to which the chamfering grinding wheel is fitted. At a recording means 52, the positioning error of the chamfering grinding wheel is sought on the basis of the command movement distance and the actual movement distance of the chamfering grinding wheel, and it is recorded as a lead error data table. Meanwhile, the chamfering width A of the plate glass is inputted into an input portion 62, and at a correction portion 64, the chamfering width A is corrected so as to remove a chamfering grinding wheel positioning error on the basis of the lead error data recorded at the recording portion 52, and on the basis of the width A1 of chamfering after correction, outputting is carried out by setting the movement distance of the chamfering grinding wheel by a movement distance setting portion 66.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to plate-like material processing for moving a workpiece such as a grindstone to a predetermined position for positioning, and processing the end surface of a plate-like material such as a glass plate with the positioned workpiece. The present invention relates to a machined member positioning method and apparatus.

[0002]

2. Description of the Related Art As shown in FIG. 6, a plate glass chamfering machine 10 includes timing belts 12A and 12B.
The timing belts 12A and 12B sandwich the both ends of the plate glass 14 and convey the plate glass 14 in the arrow direction (downstream direction). Chamfering whetstones 16A, 1 are provided outside the timing belts 12A, 12B.
6B is rotatably supported, and chamfering grindstones 16A, 1
Motors 18A and 18B are connected to 6B so as to be able to transmit the rotational force. Then, when the motors 18A and 18B are driven, the chamfering grindstones 16A and 16B rotate to grind both end surfaces of the plate glass 14 conveyed by the timing belts 12A and 12B.

The chamfering machine 10 has a fixed frame and a movable frame. The fixed frame is provided with the left timing belts 12A and 12A and the chamfering grindstone 16A, and the movable frame is provided with the right timing belts 12B and 12B and the chamfering grindstone 16B. A ball screw is connected to the moving frame, and a motor is connected to the ball screw so as to transmit a rotational force. When the motor is driven, the right timing belts 12B and 12B and the chamfering grindstone 1 are moved through the moving frame.
6B moves. Thereby, when the size of the plate glass 14 is changed, the right timing belts 12B and 12B and the chamfering grindstone 16B are positioned at appropriate positions, and the end surface of the changed plate glass 14 is ground.

[0004]

However, a ball screw generally has a lead error, and this lead error affects the positioning of the chamfering grindstone, and the chamfering grindstone cannot be precisely positioned. . The present invention has been made in view of such circumstances, and an object of the present invention is to provide a processing member positioning method and device for a plate-shaped material processing machine that can accurately position a chamfering grindstone.

[0005]

SUMMARY OF THE INVENTION The present invention is directed to a plate material processing machine for moving and positioning a processing member to a predetermined position based on a commanded moving distance and processing the plate material with the positioned processing member. In the machining member positioning method, a step of positioning the machining member based on the command movement distance, measuring a position of the positioned machining member to detect an actual movement distance, the actual movement distance and the command movement distance. Determining the positioning error of the processing member based on the above, and recording the positioning error as error data, and correcting a new command movement distance so as to eliminate the positioning error of the processing member based on the error data, A step of outputting the corrected command movement distance as a movement signal of the machining member, and a machining member positioning method for a plate material machining machine, and a method for carrying out the method. It is the location.

[0006]

According to the present invention, the detecting means detects the actual movement distance of the machining member by measuring the position of the machining member positioned based on the command movement distance. Further, the recording means obtains the positioning error of the machining member based on the actual movement distance and the command movement distance, and records the command movement distance and the positioning error of the machining member as error data. Further, the control means corrects a new command movement distance based on the data recorded in the recording unit so as to eliminate the positioning error of the machining member, and outputs the corrected command movement distance as a movement signal of the machining member. .

In this way, the positioning error data of the machining member is recorded in advance, the command movement distance is corrected based on the error data recorded in advance, and the corrected command movement distance is used as the movement signal of the machining member. Since the data is output, the movement error of the processed member is eliminated.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a method and apparatus for positioning a processing member of a plate material processing machine according to the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a plan view of a plate glass chamfering machine in which the machined member positioning device for a plate material processing machine according to the present invention is used, and FIG. 2 is a block of the machined member positioning device for a plate material processing machine according to the present invention. It is a figure. It should be noted that, in FIG. 1, the same members as those of the conventional chamfering machine 10 shown in FIG. As shown in FIG. 1, a plate glass chamfering machine 30 includes timing belts 12A and 12B. The timing belts 12A and 12B are the plate glass 1
Both ends of 4 are sandwiched and conveyed in the arrow direction (downstream direction). Chamfering grindstones 16A and 16B are rotatably supported on the outside of the timing belts 12A and 12B, and a motor (not shown) is connected to each of the chamfering grindstones 16A and 16B so as to transmit a rotational force. There is. Then, when each motor is driven, the chamfering grindstones 16A and 16B rotate, and the plate glass 1 conveyed by the timing belts 12A and 12B.
Grind both end faces of No. 4.

The chamfering machine 30 has a fixed frame 32.
A and a moving frame 32B are provided. Fixed frame 3
2A is provided with left timing belts 12A, 12A and chamfering grindstones 16A, 16A, and moving frame 32B is provided with right timing belts 12B, 12B.
And chamfering grindstones 16B and 16B are provided. The moving frame 32B is slidably supported by linear guides 33A and 33B, and the linear guides 33A and 33B are fixed to a base 38. Furthermore, the moving frame 32B
Ball screws 34A and 34B are screw-connected to the
The ball screws 34A and 34B are rotatably supported by the base 38 via bearings 36A and 36B.

Bevel gears 40A and 40B are fixed to the ends of the ball screws 34A and 34B, respectively.
Bevel gears 42A and 42B mesh with 0A and 40B. A shaft 44 is fixed to the bevel gears 42A and 42B, and the shaft 44 is rotatably supported by the base 38. A speed reducer 46 is provided at the left end of the shaft 44.
The servo motor 48 is connected via the so as to be able to transmit the rotational force. Then, when the servo motor 48 is driven, the moving frame 32B moves in the direction of arrow BC along the linear guides 33A and 33B. Therefore, the timing belts 12B, 12B and the chamfering grindstones 16B, 16B are indicated by arrows B-.
Move in the C direction.

The chamfering machine 30 configured as described above
Comprises a detection means 50, a recording means 52 and a control means 54. The detecting means 50 comprises a laser interferometer 56 and a reflecting mirror 58. The laser interferometer 56 and the reflecting mirror 58 are arranged on a straight line connecting the middle of the chamfering grindstones 16A, 16A and the middle of the chamfering grindstones 16B, 16B. There is. The laser interferometer 56 is fixed to the floor outside the fixed frame 32A, and the reflecting mirror 58 is fixed to the moving frame 32B. Then, the projected laser light 60 A projected from the laser interferometer 56 is reflected by the reflecting mirror 58, and the reflected laser light 60 A
B is incident on the laser interferometer 56. The laser interferometer 56 causes the projected laser light 60A and the reflected laser light 60B to interfere with each other to measure the distance between the laser interferometer 56 and the reflecting mirror 58. As a result, the detecting means 50 measures the moving distance of the moving frame 32B and detects the actual moving distance of the chamfering grindstones 16B, 16B provided on the moving frame 32B.

The recording means 52 is a chamfering grindstone 16B, 16B.
Of the chamfering grindstones 16B and 16B (hereinafter, referred to as a lead error) based on the actual moving distance of the chamfering wheel and a command moving distance described later (that is, corresponding to the chamfering width of the plate glass 14) It is recorded as an error data table (see FIG. 3). Here, a method of creating the read error data table will be described. First, the conditions are set. The chamfering machine 30 has a chamfering width of the plate glass 14 of 520 mm to
It can be used in the range of 250 mm, and chamfering whetstone 16
B and 16B are widened to the maximum (chamfering width is 52
(Corresponding to the case of 0 mm) was set as the origin position. Further, as described above, since the ball screws 34A and 34B are mechanically connected to each other and are rotated by the drive of the single servo motor 48, the rotation angles of the ball screws 34A and 34B are the same. Therefore, the movement error of the moving frame 32B (that is, the movement error of the chamfering grindstones 16B, 16B) is a combination of the errors of the ball screws 34A, 34B. Then, as described above, the laser interferometer 56 and the reflecting mirror 58 are arranged on a straight line connecting the middle of the chamfering whetstones 16A, 16A and the middle of the chamfering whetstones 16B, 16B, and the chamfering whetstones 16B, 16B are The read error in the middle is corrected.

Next, the procedure for creating the read error data table will be described. When the read error data table is created, a signal of the chamfering working width A input to the input unit 62 described later is directly transmitted to the movement distance setting unit 66. (1) First, the chamfering grindstones 16B and 16B are widened to the maximum so that the chamfering width becomes 520 mm, and this position is set as the origin position.

(2) The laser interferometer 56 measures the distance between the laser interferometer 56 and the reflecting mirror 58, and the measured value is set to 0.
Reset. (3) Next, the chamfering grindstones 16B and 16B are positioned so that the chamfering width is 500 mm. (4) After the positioning is completed, the numerical value of the laser interferometer 56 is read to obtain the read error. That is, the chamfering whetstone 16
If there is no error in the moving distances of B and 16B, the chamfering width moves from 520 mm to 500 mm.
The laser interferometer 56 reading should be -20.000 mm. However, if the actual reading value of the laser interferometer 56 is, for example, -19.991 mm, the moving distance of the chamfering grindstones 16B and 16B is insufficient by 0.009 mm. Therefore, the chamfering whetstone 16B,
16B is 520.00 mm-19.991 mm = 500.09
This means that the positioning is performed at the position of mm 2, and the read error at this time is +0.009 mm.

(5) The chamfering grindstones 16B, 16B are returned to the origin position, and the reading value of the laser interferometer 56 is substantially zero (±).
Confirm that it is within 0.01 mm (that is,
Check the reproduction accuracy of the chamfering whetstones 16B, 16B). (6) Chamfering grindstone 1 so that the chamfering width is 480 mm
6B and 16B are positioned, and after positioning is completed, the read error is obtained in the same manner as in item (4). For example, laser interferometer 5
Assuming that the reading value of 6 is -39.983 mm, the chamfering grindstones 16B and 16B are 520.00 mm-39.983 mm = 480.017
This means that the positioning is performed at the position of mm 2, and the read error at this time is +0.017 mm.

(7) The steps of (3) to (6) are repeated while sequentially changing the chamfering width, and the data table of the read error shown in FIG. 3 is created. The read error of the data number (for example, 24, 22 etc.) for which there is no read value of the laser interferometer 56 on the read error data table of FIG. 3 is a value obtained by linear interpolation. Also, data number 2
Although there is no reading value of the laser interferometer 56 in 6, the read error of the data number 26 is the data necessary for the calculation algorithm of the linear interpolation calculation of the data numbers 24, 22, etc. Is put in.

The control means 54 has an input section 62, a correction section 64 and a movement distance setting section 66. The chamfering working width (that is, the set glass width) A of the plate glass 14 is input to the input unit 62, and the input unit 62 transmits the signal of the input chamfering working width A to the correction unit 64. When the chamfering processing width A is transmitted to the correction unit 64, the correction unit 64 is recorded in the recording unit 52 as shown in FIG.
Chamfering wheels 16B, 16 based on the lead error data of
The chamfering working width A is corrected so as to eliminate the positioning error of B.

Here, a method of correcting the chamfering working width A will be described. For example, when the chamfering processing width A is 355.00 mm, since the read error is not recorded in the read error data table of FIG. 3, it is necessary to obtain the read error by linear interpolation calculation. When the chamfering processing width A is transmitted to the correction unit 64 via the input unit 62, the correction program of the correction unit 64 is activated and the interpolated value of the read error is calculated in the following procedure.

First, C is obtained from the following equation (1). Here, when the integer part of C is set to C _i and the decimal part of C is set to C _j , C _i = 10 C _j = 0.5. Using the read error data table of FIG.
Read error of data number 10 corresponding to C _i α _i = 0.
056 mm is obtained, and further, the read error α _{i + 1} = 0.050 mm of the data number 11 corresponding to C _{i + 1} is obtained.
Then, the read error β calculated by the linear interpolation calculation is obtained by the following expression (2), and β = α _i + (α _{i + 1} −α _i ) C _j = 0.053 mm (2) Corrected correction The chamfering width A ₁ is obtained by the following equation (3).

A ₁ = A−β = 355.00−0.053 = 354.947 mm (3) Further, for example, when the chamfering working width A is 350.00 mm, the lead error is the lead error in FIG. If it is recorded in the data table, there is no need to perform linear interpolation calculation,
Using the read error of 0.056 mm recorded in the read error data table, the corrected chamfering processing width A ₁ = 35
It is possible to obtain 0.00-0.056 = 349.944 mm.

The corrected chamfering processing width A ₁ is calculated by the correction unit 64.
Is transmitted to the moving distance setting unit 66 via. Moving distance setting unit 66 based on the correction chamfering width A _1, chamfering grindstone 1
The moving distances of 6B and 16B are set, and the set moving distance is transmitted to the controller 70 as a command moving distance command signal. The command movement distance command signal transmitted to the controller 70 is transmitted to the servo motor 48 via the servo amplifier 72, whereby the servo motor 48 is driven and the chamfering grindstones 16B and 16B move. Also, the servo motor 4
The rotation speed of 8 is detected by the pulse generator 74, and the rotation speed detected by the pulse generator 74 is fed back to the servo amplifier 72 to accurately control the rotation speed of the servo motor 48.

The operation of the processing member positioning device of the plate material processing machine according to the present invention, which is configured as described above, will be described below.
The case where is 355.00 mm will be described. First, the read error data table shown in FIG. 3 is created by the above-described procedure and recorded in the recording means 5 in advance. And the input unit 6
Enter the chamfering width A = 355.00 mm in 2. The input unit 62 converts the input A = 355.00 mm into an electric signal and transmits the electric signal to the correction unit 64. A = 35 in the correction unit 64
When the signal of 5.00 mm is transmitted, the correction program of the correction unit 64 is started, and the correction unit 64 calculates C from the following equation (1).
Seeking Further, the correction unit 64 obtains an integer part C _i = 10 of C and a decimal part C _j = 0.5 of C.

Here, the correction unit 64 uses the read error data table of FIG. 3 to obtain the read error α _i = 0.056 mm of the data number 10 corresponding to C _i 10, and further C _{i + 1} The read error α _{i + 1} = 0.050 mm of the data number 11 corresponding to No. 11 is obtained. Further, the read error β is obtained from the following equation (2), and β = α _i + (α _{i + 1} −α _i ) C _j = 0.053 mm (2) The corrected chamfering working width A ₁ is given by the following equation (3) ) From.

A ₁ = A−β = 355.00−0.053 = 354.947 mm (3) The corrected chamfering working width A _{1 obtained} is transmitted to the movement distance setting unit 66 via the correcting unit 64. It The moving distance setting unit 66 determines the chamfering grindstones 16B, 16 based on the corrected chamfering working width A _1.
The moving distance of B is set, and the set moving distance is transmitted to the controller 70 as a command moving distance command signal. The command movement distance command signal transmitted to the controller 70 is transmitted to the servo motor 48 via the servo amplifier 72, whereby the servo motor 48 is driven and the chamfering working width is 3 mm.
The chamfering grindstones 16B and 16B are accurately positioned at a position of 55.00 mm.

[0025] Incidentally, FIG. 4 is a graph showing the dimensional errors of the flat glass in the case of chamfering the flat glass in a conventional manner without correcting the chamfering width A, Figure 5 is a chamfered width A A ₁ It is a graph which shows the dimensional error of plate glass when it corrects to and chamfers plate glass. In the graphs of FIGS. 4 and 5, the vertical axis represents the dimensional error (that is, the difference between the actual size and the reference size), and the horizontal axis represents the chamfering width of the plate glass. In the case of FIG. 4, 0.2 mm-
A dimensional error occurs in the range of 0.3 mm. Also, FIG.
In the case of, the maximum and minimum values of the dimensional error are 0.177 mm, and the dimensional error fluctuates greatly due to changes in the chamfering working width.
On the other hand, in the case of FIG. 5, the plate glass is chamfered with substantially standard dimensions in all chamfering widths, and the variation of the dimensional error becomes small due to the change of the chamfering width.

In the above embodiment, the case where the end face of the plate glass is chamfered by the processing member positioning device of the plate material processing machine according to the present invention has been described, but the present invention is not limited to this. The processing member positioning device can also be applied when chamfering a plate-shaped material such as resin other than plate glass. In the embodiment, the case where the processing member positioning device of the plate material processing machine of the present invention is used in the plate glass chamfering processing machine is not limited to this, and is also applied to other plate material processing machines. Good.

[0027]

As described above, according to the processing member positioning method and apparatus for a plate material processing machine of the present invention, the positioning error of the processing member is calculated based on the actual movement distance detected by the detection means. The determined positioning error of the processed member is recorded as error data. Then, the control means corrects the new command movement distance so as to eliminate the positioning error of the processing member based on the recorded error data.

As described above, since the positioning error data of the machining member is recorded in advance, the command movement distance is corrected based on the error data recorded in advance, and the corrected command movement distance is output as the movement signal of the machining member. , The movement error of the processed member is eliminated. Therefore, the processed member can be precisely positioned at a desired position.

[Brief description of drawings]

FIG. 1 is a plan view of a plate glass chamfering machine in which a processing member positioning device for a plate material processing machine according to the present invention is used.

FIG. 2 is a block diagram of a processing member positioning device of a plate material processing machine according to the present invention.

FIG. 3 is a data table of read errors obtained by the processing member positioning device of the plate material processing machine according to the present invention.

FIG. 4 is a graph showing the dimensional error of the plate glass when the plate glass is chamfered by the conventional method without correcting the chamfering width A.

FIG. 5 is a graph showing the dimensional error of the plate glass when the plate glass is chamfered by correcting the chamfering width A to A _1.

FIG. 6 is a perspective view of a conventional plate material processing machine.

[Explanation of symbols]

 14 ... Plate glass (plate material) 16B ... Chamfering grindstone (processing member) 30 ... Positioning device for plate material processing machine 50 ... Detecting means 52 ... Recording means 54 ... Control means

Claims (2)

[Claims] 1. A processing member positioning method for a plate material processing machine, wherein a processing member is moved to a predetermined position based on a command movement distance to be positioned and a plate material is processed by the positioned processing member. Positioning the processing member based on the moving distance, measuring the position of the positioned processing member to detect the actual moving distance, and positioning the processing member based on the actual moving distance and the commanded moving distance A step of obtaining an error and recording the positioning error as error data; a new command movement distance is corrected based on the error data so as to eliminate the positioning error of the processing member; A step of outputting a movement signal of a processing member, and a method of positioning a processing member of a plate material processing machine, comprising: 2. A processing member positioning device for a plate material processing machine for moving and positioning a processing member to a predetermined position based on a command movement distance, and processing the plate material with the positioned processing member. Detecting means for positioning the processing member based on the moving distance, measuring the position of the positioned processing member to detect the actual moving distance, and the processing member based on the actual moving distance and the command moving distance. Recording means for determining a positioning error and recording the positioning error as error data, and a new command movement distance is corrected based on the error data so as to eliminate the positioning error of the processing member, and the corrected command movement distance A processing member positioning device for a plate-shaped material processing machine, comprising: a control unit that outputs as a movement signal of the processing member.