JPS61131819A - Shaving operation controlling method - Google Patents

Abstract

PURPOSE:To check any drop in machining accuracy, by setting a traveled variable in a slide base on the basis of size of a cutter at the shaving a surface of a gear or the like of machining, while compensating size of the work machined and thereby setting the traveled variable for the next machining. CONSTITUTION:A traveled variable in a slide base is set on the basis of a distance ranging from a reference position in a traveling path of the slide base to a shaving cutter position and size of a shaving cutter. Next, according to this traveled variable, the slide base is moved to the shaving cutter side, and with movement of the slide base, a work is shaved, and size of the work is measured, comparing this measured value with the setting value. When the comparison result is differs, its deviation is found, and furthermore a compensation value, checking this deviation value to zero, is found, and on the basis of this compensation value, the traveled variable of the slide base is corrected, thus the next traveled variable is set.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a shaving control method, and particularly to a shaving control method suitable for shaving the surfaces of various workpieces such as gears.

[Conventional technology]

After cutting the workpiece, finishing the tooth surface of the gear.
For this purpose, shaving equipment is used. When shaving a gear using this device, the workpiece is fixed on the slide base, the slide base is moved to the shaving cutter installation position, the shaving cutter and the gear are engaged and rotated together, and the shaving cutter is used to shave the gear. A method is used to remove the cut holes and small protrusions on the tooth surface and finish the tooth surface to a smooth surface.

[Problem that the invention seeks to solve]

However, in conventional shaving processing equipment, when moving the slide base, a control method was used in which the slide base was moved to a position where it came into contact with a mechanical position detection means, such as a limit switch. When the machine was thermally deformed due to temperature, an error occurred in the amount of movement of the slide base, and it was not possible to maintain a machining accuracy of 1 ft at a constant state. For this reason,
Workers were forced to periodically adjust the entire movement of the slide base.

Therefore, a method has been proposed in which the amount of movement of the slide base is set in advance and the slide base is moved according to this setting value. Even if an error occurs in the machining dimensions of the workpiece due to deformation, etc., this error is not fed back to the amount of movement of the slide base, making it impossible to maintain the machining accuracy of the workpiece at a constant state.

The present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to provide a shaving processing control method that can suppress a decrease in processing accuracy for a workpiece.

[Means for solving problems]

In order to achieve the above object, the present invention, as shown in FIG. Set the amount of movement (step 100), and move the slide base toward the shaving cutter according to this amount of movement (step 10).
2) Perform shaving processing on the workpiece as the slide base moves, step 104), measure all dimensions of the processed workpiece step 106), and use this measured value and nine set values as the dimensions of the workpiece after processing. (step 108), and if the measured value and the set value are different, calculate the deviation between the measured value and the set value (step 110).
), further find a correction value to suppress this deviation value to zero (step 112), and correct the movement amount of the slide base based on this correction value. This is set as the amount of movement of the base (step 116).

〔Example〕

Hereinafter, preferred embodiments of the present invention will be described based on the drawings.

FIG. 2 shows the configuration of an embodiment to which the present invention is applied.

As shown in FIG. 2, the shaving apparatus in this embodiment includes a shaving machine 10 that moves a workpiece fixed to a slide base and performs shaving on the workpiece, and a shaving machine 10 that controls the relative distance between the shaving cutter and the workpiece. The displacement sensor 12 for detection, the post-process gauge 14 for measuring the dimensions of the shaved workpiece, and the total amount of movement of the slide base are set, and the amount of movement of the slide base is corrected based on the measured value of the post-process gauge 14. A measurement unit 16 outputs a command pulse for instructing the movement of the slide base based on the output signal of the displacement sensor 12, and the movement of the slide base is fully controlled in accordance with the command pulse from the measurement unit 16. It is composed of a control unit 18.

As shown in FIGS. 3 and 4, the shaving machine 10 has a column 20t that constitutes the main body of the machine, and the shaving cutter 22 is mounted on a cutter support member 24t.
A slide base 26 is fixed to the top of the column 20 via a bar guide 30, and a slide base 26 is fixed to the plate-like pace 28 so as to be movable up and down. A ball screw 32 is fixed to the center of the bottom of the slide base 26, and the slide base 26 is connected to a feed motor 36 through the ball screw 32 and the reduction mechanism 34. Therefore, the slide base 26 can be moved up and down by driving the feed motor 36. Further, a workpiece support member 38 is fixed to the upper part of the slide base 26.

A collet chuck 40 is rotatably fixed at the end of the workpiece support member 38, and a workpiece 42 is mounted on the outer peripheral surface of the collet chuck 40.

Further, a plate adjuster 46 is rotatably fixed to the upper part of the workpiece support member 38 via a bracket 44. A disk-shaped plate 48 is fixed to the upper part of the plate adjuster 46 so as to be movable up and down. This plate 4
8 is disposed at a position where it can come into contact with the detector 50 of the displacement sensor 12 which is fixed to the cutter support 24 via the bracket 49. A center rod 54 is fixed on the slide base 26 and is slidable on a support device 52 for supporting the workpiece 42. The workpiece 42 is held by the collet chuck 40i by the center rod 54.
rotation can be supported.

The displacement upper sensor 12 has a detector 5 as shown in FIG.
0 is fixed to the case 52 so as to be movable up and down.

That is, the detector 50 is connected to a rod 54, and the rod 54 is fixed to the case 52 by a retractable rubber boot 56. A support member 58 is fixed to approximately the center of the rod 54, and a spring 60 is interposed between the side wall of the case 52 and the support member 58. The rod 54 is urged downward by the elastic force of the spring 60. Further, a core 62 is provided on the distal end side of the support member 58.
A connecting rod 64 is fixed, and the core 62t moves up and down as the rod 64 moves up and down. A coil 66 consisting of a secondary coil is wound. That is, the core 62 and the coil 66 constitute a differential transformer, which is configured to output an electric signal in accordance with the vertical movement of the rod 54. There is.

The post process gauge 14 has a measuring tool for measuring the overball diameter, and compares the overball diameter of the basic workpiece of a good product, that is, the master gear gear, with the overball diameter of the shaved workpiece, and determines the workpiece 42. In addition to determining the acceptability of the overball diameter, the deviation between the measured value and the set value is determined, and from this deviation value the workpiece 42
It is configured to divide food into five ranks and output rank signals. The rank signals are divided into three types of signals indicating that the workpiece 42 is a good product and two types of signals indicating that the workpiece 42 is a defective product. For example, when the workpiece 42 is a defective product, a rank signal of 10NG or -NG is output, and when the workpiece 42 is a good product, a +OK signal is output.

It is configured to output rank signals of OK and -OK. Among the rank signals, the OK beam 42's overball diameter is the same as the master gear gear's overball diameter, and +OK and -OK indicate that the workpiece 42's overball diameter is different from the master gear gear's overball diameter. This is used as a signal indicating that the overball diameter of the workpiece 42 is within the allowable range.

The measurement unit 16, as shown in FIG.
70, clock 72, EP-ROM74, CMO8-R
AM76, keyboard printer interface circuit 7
8. Display interface circuit 80. 16-bit A/D interface circuit 82. 8-channel relay output circuit 84. 245'-channel coupler input circuit 86, etc., and each part is connected via a pass line 88. ing.

A keyboard 90 and a printer 92 are connected to the keyboard printer interface circuit 78.
The display interface circuit 80 includes a CRT9
4 is connected. Further, the output signal of the displacement sensor 12 is supplied to the A/D interface circuit 82 via an amplifier 96 and a low-pass filter 98t. Further, the relay output circuit 84 is connected to the feed motor 36 via the relay input circuit 100i of the control unit 18.
A coupler input circuit 86 is connected to the post-process gauge 16 via a relay contact output circuit 102 of the control unit 18 .

In the above configuration, by operating the keyboard 90, the offset value D 6 for displaying the overball diameter after shaving the workpiece 42, the actual measurement value DT of the shaving cutter 220 cutter size, , the standard dimension value DT0 of the shaving cutter 220, and the correction amount DH ,, Each vertebrae data such as the distance from the reference position (slide origin) on the movement path of the slide base 26 to the installation position of the shaving cutter 22 is stored in the CMO3-RAM 76 via the keyboard printer interface circuit 78. . The amount of movement of the slide base 26 is then set based on these data. When setting the amount of movement of the slide base 26, as shown in FIG.
Feed amount from switching point P to slide base forward end P, position from forward end P4 to pack movement position P, pack movement position*Ps to slide origin P.

The feed amount up to is set respectively. And PI and P,
The area between Ps and P is defined as a rapid feed area of the slide base 26, and the area between Ps and P is defined as a cutting feed area. Also, between P and P is the slide base 2.
6 as the return area. Note that in order to completely prevent the slide base 26 from moving forward, the slide overstroke end P is set.

The amount of feed up to is also determined. In addition, control unit 1
8 is configured to operate a relay circuit according to the output signal from the post process gauge 14 and output a signal of the circuit whose contacts are closed to the coupler input circuit 86, and is also When a control signal based on the calculation result is output from the relay output circuit 84 to the relay input circuit 100, the relay circuits corresponding to the control signal are all activated and the motor drive signal is fully output to the feed motor 36. .

The present embodiment has the above configuration, and its operation will be explained in the eighth section.
This will be explained based on the flowchart shown in the figure.

First, it is determined whether or not there is so-called key manual input by operating the keyboard 90 to input settings for various parameters, switching commands for all screen switching commands on the CRT 94, and command operations for commanding data recording to the printer 92. Do everything. When the determination in this step is YES, the process moves to step 202, in which all the data generated by the operation of the keyboard 90 is stored in the 0MO8-RAM 76, and the process moves to step 206. In this step 206, the slide base 26 is moved based on the feed amount n7 set in step 202.

After step 206, the process moves to step 208, where the workpiece 42 is shaved by the shaving cutter 22, and the process moves to step 210.

In step 210, the post process gauge 14
The overpole diameter t of the workpiece 42 is measured, and a rank signal is output based on the deviation between the measured value and the set value (step 212). After step 212, the process moves to step 214, where it is determined whether the workpiece 42 is a good product based on the rank signal. When the determination in this step is NO, the processing in this routine is terminated and the MZ
Stop C. - 10,000, if the determination is YES, the process moves to step 216.

In step 216, it is determined whether or not there is a rank signal for correction among the rank signals determined to be non-defective, and if the determination in this step is negative, the workpiece is deemed to be non-defective and the processing in this routine is terminated. However, if the determination is YES, the process moves to step 218.

In step 218, a process is performed to obtain all the correction values necessary to suppress the deviation value between the measured value and the set value of the overball diameter of the companion workpiece 42 to be machined to above 0. That is, processing is performed to set the integrated correction value DH=DH+DH, and the feed amounts of P4 and P are set to values shown by the following two equations.

P',=P4 +DT/2+DH/2 ・・・・・・
α)P', =P, +DT/2+DH/2...
・(2) However, D T ” D T o D T
t (cutter diameter correction amount of shaving cutter 422).

After step 218, the work 42 is shaved and all determinations are made as to whether or not they are companions. When the shaving of the work 42 is completed, all processing in this routine is completed, and when the next work 42 is set, Step 2
The process moves to step 06, and the slide base 26 starts to move based on the corrected movement amount. Thereafter, the same process as described above is repeated.

Furthermore, when the workpiece 42 is shaved,
Based on the detection output of the displacement sensor 12, the position of the slide base 26 converted into the overball diameter of the workpiece 42 is calculated. The position of the slide base 26 is calculated based on the following equation (3).

Overball diameter = D o + D T + D HD
B x 2...(3) Here, DB is displacement sensor 12
Indicates the amount of displacement from the zero reference position.

In this embodiment, after shaving the workpiece 42, the overball diameter of the workpiece 42 is measured using the post-process gauge 14, and if the measured value and the set value differ, the measured value and the set value are Find a correction value that suppresses this deviation value to zero, correct the amount of movement of the slide base based on this correction value gold foil, and change the amount of movement t to the amount of movement of the slide base 26 in the next machining cycle. Even if the shaving cutter 22 is thermally deformed and an error occurs in the overball diameter of the workpiece 42, this overball diameter is set as the slide base 2.
Workpiece 4 is fed back as the movement amount of workpiece 6, and is set to the slide base movement amount or an appropriate movement amount.
It is possible to prevent the machining accuracy for No. 2 from decreasing.

In addition, in this embodiment, even when the shaving cutter 22t is replaced due to a change in the design of the workpiece to be processed, or when the shaving cutter 22 is replaced when processing the same type of workpiece, the cutter size of the shaving cutter 22 can be precisely measured. By inputting the value DT from the i-keyboard 90, the workpiece 42 can be shaved without changing the feed amount of the points )P and =Pa each time.

Furthermore, in the above embodiment, when correcting the entire movement amount of the slide base 26, instead of correcting the movement amount every time,
After machining a plurality of workpieces, it is also possible to prevent a decrease in machining accuracy for the workpiece 42 by correcting the amount of movement of the slide base based on the average value of these overball diameters.

〔Effect of the invention〕

As explained above, according to the present invention, the amount of movement of the slide base is set based on the dimensions of the tomo shaving cutter, and the slide base is moved toward the shaving cutter according to this amount of movement to shave the workpiece. The dimensions of the processed workpiece are determined, and this measured value is compared with the set value determined as the dimension of the workpiece after processing. If the measured value and the set value are different, the measured value and the set value are Calculate the deviation between the two, calculate the correction value that suppresses this deviation value to zero, correct the amount of movement of the slide base based on this correction value, and use the corrected amount of movement as the amount of movement of the slide base in the next machining cycle. Since the shaving cutter is thermally deformed t, ycL, the processing accuracy for the workpiece can always be maintained at a constant level even if the shaving cutter's degree changes.

[Brief explanation of the drawing]

Figure 1 is a flowchart for explaining the entire invention.
The figure is an overall configuration diagram of a device to which the present invention is applied, and FIG.
2- and 5-ring machining machine front view, Figure 4 is a side view of Figure 3, Figure 5 is a configuration diagram of the displacement sensor, Figure 6 is a configuration diagram of the measurement unit and control unit, and Figure 7 is the machining machine. A diagram showing the complete relationship between the cycle and the feed amount of the slide base, Figure 8 is the second
3 is a flowchart for explaining the entire operation of the device shown in the figure. 10... Shaving processing machine, 12... Displacement sensor, 14... Post process gauge, 16
...Measuring unit, 18...-fllll unit, 22...Shaving cutter, 26.
...Slide base.

Claims (1)

[Claims] (1) Set the amount of movement of the slide base based on the distance from the reference position on the movement path of the slide base to the shaving cutter installation position and the dimensions of the shaving cutter,
The slide base is moved to the shaving cutter side according to this movement amount, the workpiece is shaved as the slide base moves, the dimensions of the machined workpiece are measured, and this measurement value and the dimensions of the workpiece after processing are When the measured value and the set value differ, the deviation between the measured value and the set value is determined, and a correction value that suppresses this deviation value to zero is determined. Based on this correction value, A shaving processing control method comprising: correcting the amount of movement of a slide base, and setting the corrected amount of movement as the amount of movement of the slide base in the next processing cycle.