JPH0628818B2 - Processing equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a processing apparatus that inspects whether or not a stroke limit is exceeded and, if the stroke limit is exceeded, avoids it. Is.

[Prior Art] FIG. 4 is a schematic configuration diagram showing a wire electric discharge machining apparatus as a conventional machining apparatus of this type. In the figure, (12) is a workpiece, (10) is a movable table for mounting and fixing the workpiece (12), (16) and (20) are sliding parts, and (14) and (18) are Sliding part (16),
A drive motor for moving (20), (22) a numerical control device for giving a signal to each drive motor (14), (18), (24) an electrode for processing a workpiece (12) Wire, (30), (3
2) is a wire guide for supporting the wire (24), (26) is a wire bobbin around which the wire (24) is wound, and (36) is a wire (24).
A tension roller for winding up the wire, (38) a wire winding roller for collecting the used wire (24), and (2)
8) and (34) are power supply units for applying voltage to the wire (24) and the workpiece (12), (40) is a power supply device, (42) is a DC power supply in the power supply device (40), (44) is a switching transistor for turning the DC power supply (42) on and off to form a pulse waveform,
(50) is a control unit for controlling the switching transistor (44), (48) is a limiting resistor, (46) is a charging capacitor, (52) is a working fluid device, and (54) is a discharging medium. Liquid, (56) is a processing tank for accumulating the machining fluid (54), (58) is a filter for filtering the machining fluid (54), (60) is a pump for pumping the machining fluid (54), and (62) is machining. Liquid (54) to be processed
It is a nozzle for supplying to (12).

Next, the operation of the conventional wire electric discharge machine shown in FIG. 4 will be described. Workpiece (12) is movable table (10)
The movable table (10) is mounted and fixed on the movable table (10) in the X-axis direction by the drive motor (14) and the drive motor (1).
The position is controlled by the numerical controller (22) in the Y-axis direction by 8). The power supply parts (28), (34) are connected to the wire (24).
Through the switching transistor (4
The voltage V of the DC power source (42) is applied via the charging capacitor (46) by the control unit (50) and the control unit (4). On the other hand, the working fluid (54) filtered by the filter (58) in the working fluid device (52) is pumped out by the pump (60) and used as a discharge medium between the workpiece (12) and the wire (24). Supplied. Therefore, electric discharge is generated between the wire (24) and the workpiece (12), and machining can be performed according to a command from the numerical control device (22). The numerical control device (22) outputs a position control signal according to an NC (numerical control) program, and at the same time, displays a CRT (cathode ray tube) display device or the like on the NC coordinates and processing conditions.

[Problems to be Solved by the Invention] In the conventional processing apparatus as described above, it is necessary to inspect whether or not the stroke end is exceeded, but at the time of the inspection, the movable table (10) is actually moved. If the stroke end is exceeded, the work piece must be reset and re-inspected many times, and the cause of the stroke end being exceeded is an input error to the program. In some cases, it is possible to notice the possibility of an input error in the program only after repeating the above-mentioned resetting frequently, and after repeating the above-mentioned resetting too much, all program blocks that may cause a stroke end. However, there is a problem that the work efficiency is significantly reduced, for example, it is necessary to inspect.

The present invention has been made to solve the above problems, and it is possible to inspect whether or not the stroke limit is exceeded without resetting the workpiece and performing reinspection many times. It is an object of the present invention to provide a processing device capable of immediately avoiding the stroke limit even when the stroke limit is exceeded due to an input error.

[Means for Solving the Problem] A machining apparatus according to the present invention is a stroke limit detecting means for detecting whether or not a stroke limit is exceeded by calculation based on previously input data such as a machining start position, and this stroke limit detecting means. And a program block display means for displaying a program block that reaches the stroke limit when the stroke limit is detected by the means.

[Operation] In the processing apparatus of the present invention, whether or not the stroke limit is exceeded is detected by calculation, and when it is detected that the stroke limit is exceeded, the program block that becomes the stroke limit is displayed.

[Embodiment] FIG. 1 is a view showing a CRT screen of a CRT display device displayed by a wire electric discharge machine which is an embodiment of the present invention, and FIG. 2 is a wire electric discharge machine which is an embodiment of the present invention. And FIG. 3 is a block diagram showing a control program in the wire electric discharge machine which is an embodiment of the present invention. In FIG. 3, PRE
The PRO program decodes the NC data from the paper tape and passes the data necessary for moving the table to the MOTION program. The MOTION program outputs a signal to the drive motor that moves the table based on the passed data. In addition, the DISPLAY program carries out the stroke end inspection based on the above data, and the stroke end inspection result and the program block which becomes the stroke end together with the coordinate values are displayed on the CRT display unit.
Display on the RT screen.

Next, the operation of the wire electric discharge machine according to the embodiment of the present invention will be described with reference to FIGS.
When inspecting the stroke end, first, the NC program is decoded by the PREPRO program as shown in step 1 (S1) of FIG. Then MOTIO
The movement coordinate is displayed by N program
Given to the program. The DISPLAY program adds the given movement coordinates to the preset machining start coordinates [Step 2 (S2)], compares the value with the table stroke amount set by the table, and starts machining. It is determined whether or not the stroke end is exceeded (step 3), and if the stroke end is exceeded (step 3), proceed to step 4 (S4) and shown in FIG. Like CRT
Display that fact on the screen. If it does not exceed (does not exceed) the stroke end, proceed to step 5 (S5),
Determine if the program is finished. After that, the above contents are repeated until the end of the NC program, and the stroke end inspection is completed.

In the above process, when the stroke end is exceeded, not only that fact is displayed on the CRT screen as shown in FIG. 1, but also the program block (execution block) at the stroke end is displayed. In the above embodiment, it is displayed as “L1234 N1234 B12”, and the program number (L1234) and the sequence number (N123
4) and the block number (B12) are pointed out.

Further, in the above embodiment, only the stroke end inspection is described, but it may be applied to an inspection of a certain specific coordinate range, and two adjacent shapes such as when processing a plurality of workpieces at the same time. It may be used to inspect for interference.

Furthermore, although the wire electric discharge machining apparatus has been described in the above-mentioned embodiment, the invention can be applied as long as it is an NC-controlled machining apparatus, and the same effect as that of the above-mentioned embodiment can be obtained.

[Effects of the Invention] As described above, according to the present invention, the stroke limit detecting means for detecting whether or not the stroke limit is exceeded based on the previously input data such as the machining start position, and the stroke limit detecting means by the stroke limit detecting means. When it is detected that the stroke exceeds the stroke limit, the program block display means for displaying the program block that becomes the stroke limit is provided, so that the stroke limit is exceeded without resetting the workpiece and performing reinspection many times. Whether or not the stroke limit is exceeded due to an erroneous input to the program can be immediately inspected and a processing device can be obtained, which is an excellent effect.

[Brief description of drawings]

FIG. 1 is a view showing a CRT screen of a CRT display device displayed by a wire electric discharge machine which is an embodiment of the present invention, and FIG. 2 is a flow of processing in a wire electric discharge machine which is an embodiment of the present invention. FIG. 3 is a block diagram showing a control program in the wire electric discharge machine which is an embodiment of the present invention, and FIG. 4 is a schematic configuration diagram showing a conventional wire electric discharge machine. In the figure, (10) ... movable table, (12) ... workpiece, (14), (18) ... driving motor, (16), (20) ... sliding part, (22) ... … Numerical control device, (24) …… Wire, (26) ……
Wire bobbin, (28), (34) …… Feeder, (30), (32) ……
Wire guide, (36) …… Tension roller, (38) …… Wire take-up roller, (40) …… Power supply, (42) …… DC power supply, (44) …… Switching transistor, (46) …… Charging capacitor, (48) …… Limiting resistance, (50) …… Control unit, (52) …… Working fluid device, (54) …… Working fluid, (5
6) …… Processing tank, (58) …… Filter, (60) …… Pump, (6
2) ... It is a nozzle.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-58-217223 (JP, A) JP-A-60-502 (JP, A)

Claims (1)

[Claims] 1. A stroke limit detecting means for detecting whether or not the stroke limit is exceeded based on previously input data such as a machining start position, and a case where the stroke limit detecting means detects that the stroke limit is exceeded. A processing device, comprising: a program block display unit that displays a program block that reaches a stroke limit.