JPH04106604A - Signal processing system for axis selecting nc punch device - Google Patents

Abstract

PURPOSE:To increase the working speed of a shaft selecting NC punch device by making a punching terminating signal inactive so as to terminate one punching cycle when a punch pin ascending end signal is detected while a punching command is inactive. CONSTITUTION:When a punching terminating signal is outputted to an NC 20 after a punch pin descending end signal (e) detecting the completion of punching to a green sheet 15 by means of a punch pin 2 is detected and a punch pin ascending end signal (d) is detected while a punching command is inactive, the punching terminating signal (b) is made inactive so as to terminate one punching cycle. Therefore, the working speed can be increased by reducing the communication signal processing time between the NC 20 and a punch controlling section 21.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a green sheet drilling machine having a numerical control device, and particularly to a signal processing method of the numerical control device that can increase processing speed.

[Conventional technology]

Generally, the punch head of a green sheet punching machine (hereinafter referred to as an NG punching machine) having a numerical control device has a configuration as shown in FIG. That is, 1 is a punch head portion, and 2 is a punch pin. Reference numeral 3 denotes a suction plate made of a magnetic material, and is provided on the upper part of the punch pin 2. Reference numeral 4 represents a support plate, which is provided on the lower part of the punch pin 2. 5 is a spring base, and 66 is formed. A punch pin 2 passes through this six. Also, 7 is a coil spring, and spring base 5
The punch pin 2 is fitted onto the punch pin 2 so as to be located between the support plate 4 and the support plate 4. The punch pin 2 is always urged in the direction of the arrow through the support plate 4. 8 is a coil base in which a hole 9 is formed. A bunch pin 2 passes through this hole 9. A coil 10 is wound around a bobbin 11 and placed on the coil base 8. When this coil 10 is energized, it generates an attractive force against the suction plate 3 and lowers the punch pin 2 in the direction of arrow B via the suction plate 3. 12.13 is a position sensor. The position sensor 12 is a position inspection device that detects that the punch pin 2 has been lowered to the lowest point by the coil 1o. This is the position detection amount for detecting. 14 is a position detection dog, which is provided at the uppermost end of the punch pin 2 and faces the position sensors 12 and 13 at its moving end;
This is to detect that the punch pin 2 has moved to the lowest point or the highest end. 15 is a green sheet, which is a workpiece in which a hole is to be drilled. Reference numeral 16 denotes a sheet frame for fixing the green sheet 15. Two XY child tables (not shown) are fixed thereto, and the frame is configured to be movable in the left-right direction (1) in the front-rear direction in the figure. ]-7 is a die, and this die 17 has a chip discharge hole 1.
8 is provided. Then, the hole punching position of the green sheet 15 is changed from the XY child table, the coil 10 is energized, and the punch pin 2 is moved to punch a hole in the green sheet. Chips produced by drilling are discharged through a chip discharge hole 18 formed in the die 17. The control system for driving the punch head of this NC punching device has a configuration as shown in FIG. That is, 20 is a numerical control unit (hereinafter referred to as NC);
21 is a punch control section, and 1 is a punch head section. The NC 20 determines where in the green sheet 15 a hole is to be made, drives the XY child table, and then outputs a punch command a to the punch control section 21. When the NC 20 receives the punch end signal from the punch control section 21, it moves the xY child table to the primary punch position. Further, the punch control section 21 outputs a lowering command C to the punch head section l based on the punch command a from the NC 20. The punch head section 1 includes a power source for energizing the coil 1o, and energizes the coil 10 based on the lowering command C1 and lowering end signal e of the punch pin 2 output from the punch control section 21. The bunch pins 2 are raised or lowered by de-energizing them. Further, when the punch pin 2 reaches the lowest end, a lowest end signal e is output to the punch control section 21. The NC punch device configured as described above operates as follows. The NC 20 determines at which position in the green sheet 15, which is fixed to the sheet frame 16 and to which an XY child table (not shown) is fixed together with the sheet frame 16, a hole is to be made. Then, as shown in FIG. 4(A), at time T,
Start child table movement. High in Figure 4 (A)
h indicates moving, and LoW indicates stopped. And x
After driving the Y child table, a punch command a is sent to the punch control unit 21 at time T□ as shown in FIG. 4(B).
Output. The punch control unit 21 that received the punch command a recognizes the punch command a, and at time T2, the punch control unit 21 executes the fourth punch command a.
As shown in Figure (D), a lowering command C for the bunch pin 2 is output to the punch pin head section 1. Therefore, the punch head section 1 receives the punch pin lowering command C and starts energizing the coil 10. Then, an attractive force is generated from the coil 10 to the suction plate 3, and the punch pin 2 starts to descend together with the suction plate 3. At time T, 1, as shown in FIG. 4(E),
The position detection dog 14 is removed from the position sensor 13 that detects the position of the upper end. The drilling of the green sheet 15 is completed. At time T4, the position detection dog 14 moves to the position shown in FIG.
), the position sensor 12 that detects the position of the lower end is pressed. Therefore, the position sensor 12 outputs the punch pin lowering end signal e. When the punch control unit 21 recognizes this falling edge signal e, at time T, as shown in FIG. 4(D),
When the lowering command C of the punch pin 2 is cut off, the current supply to the coil 10 is cut off, and the coil 10 loses its suction force for suctioning the suction plate 3. Then, the punch pin 2 begins to rise due to the restoring force of the coil spring 7 and is pulled out from the green sheet 15. Then, the punch pin 2 that has come out of the green sheet 15 further rises, and at time T6, the position sensor 13 is struck by the position detection dog 14, and the punch pin 2 reaches the highest point. It is detected that the temperature has increased. Then, the position sensor 13 outputs a rising end signal d to the punch control section 21. Upon recognizing this rising edge signal d, the punch control section 21 outputs a punch end signal s to the NC 20 at one time T7, as shown in FIG. 4(C). N.C.
20 receives the punch end signal from the punch control section 21 and interrupts the punch command a at time T, as shown in FIG. 4(B). The punch control unit 21 confirms that the punch command a has expired at time 1 T, and at time T%, the punch control unit 21 executes the punch command a as shown in FIG. 4(C).
As shown in the figure, the punch end signal is cut off. Also, NC
20, the end of one punch cycle is confirmed by cutting off the punch end signal at time T, and the end of one punch cycle is interrupted at time T. At the time point, the XY child table starts moving to the primary punching position as shown in FIG. 4(A). In this way, the hole drilling position is changed from the XY child table, the coil 10 is energized, and the hole is drilled. Chips from the drilling are discharged through the chip discharge hole 18 formed in the die 17. Ru. In this way, the NC 20 and the punch control unit 21 of the axis selection NC punching device each operate asynchronously, and each performs the rotary force processing at predetermined synchronization intervals. Therefore, the time when one side outputs is not necessarily the input timing of the other, and if the output is disconnected before the next input timing, the output side may have output a signal, but the input side may not be able to recognize it. A situation may occur, resulting in leakage of signal transmission. To avoid this situation, a method called handshaking is used on the output side to confirm that the other party has received the signal. for example,
When the punch control unit 21 outputs the punch end signal, the NC 20 cuts off the punch command signal a upon receiving the punch end signal. Punch command signal a
In this method, the NC 20 confirms that the punch end signal has been received by disconnecting the punch end signal, and then disconnects the punch end signal.

[Problem to be solved by the invention]

However, in the conventional control system of the axis selection NC punch device, the NC 20 of the axis selection NC punch device and the punch control section 21 operate asynchronously, and input/output processing is performed at fixed synchronization intervals. Therefore, when receiving a signal, it is not always possible to recognize the input signal immediately when the input signal arrives, and a time lag occurs until the next input processing timing. Furthermore, even if you try to process and output an input signal, there will be a time lag until the first output processing timing, so the more the number of signal transmissions and receptions increases, the more these time lags will accumulate.
The problem is that the overall punching speed decreases. Additionally, the speed of signal processing can be improved by using a control system that has faster processing speed than conventional control systems.
It is expensive and lacks versatility. Therefore, it is desired to increase the machining speed using a conventional control system. An object of the present invention is to provide a signal processing method for a numerical control device that can increase processing speed by shortening the processing time in signal exchange between the NC and the punch control section.

[Means for Solving the Problems 1] In order to achieve the above object, in the signal processing system of the axis selection NC punch device of the present invention, the punch pin is driven by the adsorption force of the coil and the urging force of the spring, and the upper end portion Axis selection NC punch device that moves the punch head section that detects the position of the lower end to the hole punching position based on the numerical control device, and outputs a punch pin lowering signal by the punch head control section to punch holes in the green sheet. In this step, after detecting a punch pin lower end signal which detects the completion of hole punching in the green sheet by the punch pin, a punch end signal is output to the NC, and when the punch command is inactive and a punch pin upper end signal is detected. The present invention is characterized in that the punch end signal is made inactive to end one punch cycle when the punch ends. [Function] Detects the completion of punching holes in the green sheet with the bunch pin. After detecting the punch pin lower end signal, outputs the punch end signal to the NC. The punch command is inactive and the punch pin upper end signal is detected. Sometimes, the punch end signal is made inactive to end one punch cycle, so the processing speed is increased by shortening the processing time in signal exchange between the NC and the punch control unit. be able to.

【Example】

An embodiment of the present invention will be described below. 2. FIG. 1 shows a punch head portion of an NC punch device to which the signal processing method of the axis selection NC punch device according to the present invention is applied, and a control system for driving the punch head portion of the NC punch device. The configuration of the punch head portion of this NC punch device and the configuration of the control system for driving the punch head portion of the NC punch device are similar to those of the punch head portion of a conventional NC punch device. FIG. 1 shows an embodiment of a signal processing system for an axis selection NC punching device according to the present invention. First, the NC 20 determines at which position in the green sheet 15, which is fixed to the sheet frame 16 and to which an XY child table (not shown) is fixed together with the sheet frame 16, a hole is to be made. Then, as shown in FIG. 1(A), 1 time T. At the point in time, XY child table movement is started. Hi in Figure 1 (A)
gh is on the move. Low indicates that it is stopped. After driving the xY child table, a punch command a is output to the punch control section 21 at time T1 as shown in FIG. 1(B). The punch control unit 21 that has received the punch command a recognizes the punch command a and outputs a lowering command C for the punch pin 2 to the punch pin head unit 1 at time T2, as shown in FIG. 1(D). . Therefore, the punch head section 1 receives the punch pin lowering command C and starts energizing the coil IO. Then, an attractive force is generated in the coil 10 against the suction plate 3, and at time 0 T3, when the punch pin 2 starts to descend together with the suction plate 3, the position detection dog 14 is connected to the position sensor 13.
, and the rising edge signal d becomes <L as shown in Fig. 1(E).
It becomes OW. At time T when drilling holes in the green sheet 15 is finished, the position detection dog 14 hits the position sensor 12 that detects the position of the lower end.
teeth. As shown in FIG. 1 (CF), a falling end signal e is output to detect that the punch bin 2 has finished punching holes in the green sheet 15. When the punch control unit 21 recognizes this lowering end signal e, it interrupts the lowering command C of the bunch pin 2 at time T, as shown in FIG. 1(D). Simultaneously with this interruption of the lowering command C, at time T, the punch control unit 21 executes the command shown in FIG.
As shown in C), a punch end signal is output to the NC20. When the NC 20 receives the punch end signal from the punch control unit 21, that is, at time T after catching the rise of the punch end signal, it issues a punch command a as shown in FIG. 1(B). cut off. The punch end signal shown in FIG. 1(C) is output to this NC 20, and the first
Even if the punch command a shown in FIG. 1B is cut off, the punch end signal shown in FIG. It is not determined that the punch is finished, and the punch does not move on to the next punch at this point. When the lowering command C for the punch pin 2 shown in FIG. 1CD is cut off at time Ts, the current supply to the coil 10 is cut off, and the coil 10 loses its suction force to attract the suction plate 3. Then, the punch pin 2 begins to rise due to the restoring force of the coil spring 7 and is removed from the green sheet 15. Then, the punch pin 2 that has come out of the green sheet 15 further rises, and at time T6, the position sensor 13 is struck by the position detection dog 14, and as shown in FIG.
As shown in E), the rising edge signal d is output, and the punch pin 2
It is detected that has risen to the highest point. Upon recognizing this rising edge signal d, the punch control section 21 cuts off the punch end signal (High, Low) at time T7, as shown in FIG. 1(C). Then, at time 1 TL□, the NC20 is shown in FIG.
As shown in , the xY child table begins to move to the next punch position. In this embodiment, the timing at which the punch control section 21 starts outputting the punch end signal is shown in FIG.
) is the time T immediately after the rising edge of the falling edge signal e, but the timing at which the punch control unit 21 starts outputting the punching end signal S is the timing T when the falling edge signal e rises.
The timing may be the time when the punch command signal a is cut (falling timing), or the timing may be the timing when the punch command signal a shown in FIG. 1(B) is input (rising timing).

【Effect of the invention】

As configured as described above, according to the present invention, the processing speed can be increased by shortening the processing time in signal exchange between the NC and the punch control section.

[Brief explanation of drawings]

Fig. 1 is a time chart showing an embodiment of the signal processing method of the axis selection NC punching device according to the present invention, Fig. 2 is a configuration diagram showing the punch head section of the NG punching device, and Fig. 3 is the punch shown in Fig. 2. FIG. 4 is a block diagram showing a control system for driving the head section, and a time chart showing a signal processing method of a conventional axis selection NC punching device.

Claims (1)

[Claims] (1) The punch pin is driven by the attraction force of the coil and the biasing force of the spring, and the punch head section, which detects the positions of the upper and lower ends, is moved to the drilling position based on the numerical control device, and the punch head is controlled. Axis selection N that outputs the punch pin lowering signal and punches holes in the green sheet depending on the part
In the C punch device, after detecting a punch pin lowering end signal that detects the completion of hole punching in the green sheet by the punch pin, outputting a punching end signal to the NC, and detecting a punch pin rising end signal when the punch command is inactive. 1. A signal processing method for an axis selection NC punching device, characterized in that, when the punching end signal is inactive, one punching cycle is ended.