JPH0615134B2 - Processing machine control method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to, for example, drilling a printed circuit board,
The present invention relates to a control method of a processing machine used for processing a plurality of predetermined positions on a work.

[Conventional technology]

For example, for drilling the printed circuit board, the data of the machining program such as the machining position coordinates stored in advance on the paper tape is read by the numerical controller, and the numerical controller reads the target position information on the drilling machine based on the read data. Is output to drive the hole making machine to make a predetermined hole at a predetermined position on the printed circuit board.

In such drilling, since the diameter of the hole drilled in the printed circuit board is small, the diameter of the drill used in the drilling machine is also small, which often causes breakage of the drill during the drilling. This drill breakage accident was detected visually by a staff member or was detected by a drill breakage detection device that checks the amount of facets, but any of these means will immediately detect or detect a drill breakage. Are difficult to detect and are usually discovered or detected only after passing through several processing positions. Therefore, the drilling process is not performed at the processing positions where these holes have passed.

Conventionally, when such a state occurs, the first means for checking the places (unmachined places) where the drilling is not performed after the machining program is finished, and performing the drilling at those places, or When the drill break was found or detected, the hole punching machine was stopped, the paper tape was rewound, the hole punching machine was returned to the unprocessed portion, and the second hole punching process was performed from there.

[Problems to be Solved by the Invention]

By the way, the first means is
The staff member had to check the unprocessed portion and drive the drilling machine again, which was extremely troublesome and required a lot of trouble and time. Further, the second
Although the above-mentioned means is superior to the above-mentioned first means, the paper tape is rewound so that the data (coordinates) of the paper tape can be obtained.
Is read one by one in the reverse direction, and each time the necessary calculation is performed, the unprocessed part is returned to. Therefore, it not only takes a considerable amount of time to return, but also a calculation error occurs during the repetition of the calculation. However, there is a problem in that the positioning of the unprocessed portion may cause an error.

An object of the present invention is to solve the above-mentioned problems of the prior art, and to provide a control device for a processing machine, which can return the processing machine to an unprocessed portion with high accuracy in a short time.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a method for controlling a processing machine, which drives the processing machine according to a predetermined processing program and sequentially processes a plurality of predetermined positions of a work. The coordinates of the machining position to be machined based on the machining command are sequentially stored, and when the machining interruption is restored, the stored coordinates of the machining position are traced back by the number instructed based on the machining situation of the workpiece, The machining according to the machining program is resumed after machining is performed from the traced machining position to the machining position stored when the machining is interrupted based on the stored coordinates of the machining position.

[Operation] During machining by the machining machine, the coordinates of each machining position are stored in the machining order. When machining is interrupted due to some cause and then the interruption is restored, first, the machining position is determined up to the coordinate corresponding to the number determined based on the machining situation of the work, and then, From that position to the coordinates stored at the time of interruption, machining is performed for each coordinate that is sequentially stored, and after machining of the interrupted coordinates is performed, machining at the time of interruption is restarted according to the machining program.

〔Example〕

 Hereinafter, the present invention will be described based on the illustrated embodiments.

FIG. 1 is a system diagram of a control device for a punching machine for a printed circuit board according to an embodiment of the present invention. In the figure, reference numeral 1 denotes a punching machine for punching a printed circuit board. Reference numeral 2 is an XY table on which a printed circuit board is placed and is driven in the X-axis direction and Y-axis direction, and 3 is an axis on which a drill (not shown) is mounted and which is driven in the Z-axis direction. 4X and 4Y are drive devices for driving the XY table 2 in the X-axis direction and Y-axis direction, respectively, and 4Z is a drive device for driving the shaft 3. 5
Is a tape in which the coordinates of the position to be punched on the printed circuit board with respect to the machine origin and other required data are recorded by punching, and 6 is a keyboard for inputting the required data. Reference numeral 7 denotes an NC device, which outputs a predetermined control signal to the punching machine 1 based on input from the tape 5 and the keyboard 6. Reference numeral 8 is a drill breakage detecting device that detects breakage of the drill based on the amount of facets, and 9 is a storage device that stores necessary items.

Next, the operation of the present embodiment will be described with reference to the plan view of a part of the work shown in FIG. 2 and the flow chart shown in FIG. In FIG. 2, reference numeral 11 is a printed circuit board positioned and fixed on the XY table 2. O is the machine origin, X,
Y indicates a coordinate axis centered on the machine origin O. a _{1 to} a ₄ ,
b _{1 to} b ₄ indicate the drilling positions on the printed circuit board 11,
a _{1 to} a ₄ indicate positions where drilling is completed, and b _{1 to} b ₄ indicate unprocessed positions. In the following description of the embodiment, the positions b _{1 to} b ₄ will be described.
The position b ₁ is (X ₁ , Y ₁ ), the position b ₂ is (X ₂ , Y ₂ ), the position b ₃ is (X ₃ , Y ₃ ), and the position b ₄ is (X ₄ , Y _4). ), The case where the positions b _{1 to} b ₄ are unmachined due to breakage of the drill will be described.

The NC device 7 reads the processing program data (coordinates) from the tape 5 (step S of the flow chart shown in FIG. 3).
_1), X-axis to coordinates One reading from the current position, and calculates the distance in the Y-axis (the target position) (Step S _2). Then, based on the data of the machining program it is determined whether there is a command for drilling at that position (Step S _3), if any drilling command, stores the read One coordinates in step S ₁ in the storage device 9 (Step S _4), then the drive unit 4X, 4Y, and outputs a drive command to 4Z (Step S _5). As a result, the XY table 2 moves, the shaft 3 descends, and the drilling is performed at the coordinate position. Even if it is determined in step S ₃ that there is no drilling command, the XY table 2 moves to the coordinate position.

Then, (if normal state) it is determined whether the cause must stop drill breakage accident machine is generated (Step S _6), if there is such a reason, the process steps S ₇ Move on to. In step S ₇ , it is determined whether or not a flag to be described later is set. In this case, the flag is not set because it is in the normal state, and accordingly, the process is performed in step S 7.
Go to ₈ . In step S _8, whether the processing of the printed circuit board 11 has been completed, for example, to determine the end code of the tape 5, processing is not completed is returned to Step S ₁ again. In this way, the positions a _{1 to} a ₄ are processed by the processes of steps S _{1 to} S _8.
Drilling is performed.

Here, it is assumed that the drill breaks for some reason after completion of the drilling at the position a ₄ . In this case, the breakage accident for the reasons described above are not to be immediately detected by the drill breakage detection device 8, the processing in the NC unit 7 Step S ₆
Therefore, it is judged that there is no machine stop factor and the operation is continued. Therefore, the subsequent positions b _{1 to} b ₄ to be drilled are sequentially stored in the storage device 9, and the XY table 2 is also moved, but the drilling is not performed.

Now, when the drill breakage detecting device 8 is activated and the signal is input to the NC device 7 only at the position b ₄ , it is determined in step S _{6 that there} is a machine stop factor, and the process proceeds to step S ₉ . In this case, the machine is not driven, since reading from tape 5 (procedure S ₁ ) is not performed. In step S ₉ ,
It judges whether or not there is an input by the operation of the clerk's keyboard 6, and if there is no such input, it waits until there is an input. When a drill breakage accident is reported by an alarm, a display, or the like, a staff member checks the printed circuit board 11 on the XY table 2 and confirms that the positions b _{1 to} b ₄ are unprocessed. Then, in order to process those unprocessed positions, XY
In order to restore the table 2, the unprocessed number “4” and a return command are input to the NC device 7 by the keyboard 6.

When it is determined in step S ₉ that the input from the keyboard 6 is received, the process proceeds to step S ₁₀ , confirms that the input is a return command, and proceeds to step S ₁₁ . If the input from the keyboard 6 is not a return command, the process proceeds to step S ₆
Return to. In step S _11, sets the flag indicating that performs an operation for returning the machining path in order to perform the machining at the raw position (flag mentioned in step S _7), then,
Previously in and stores the number entered from the keyboard 6 '4 "(return position information) (Step S _12). After that, steps S ₆ and S ₆
The process from S ₁₂ to S ₁₂ is repeated, and the repair of the broken drill accident is awaited.

When the drill is replaced and the cause of machine stoppage is removed, this is determined in step S ₆ , and it is further determined in step S ₇ that the flag has been set. As a result, the process thereafter is a process of returning the XY table 2 to the position b ₁ . That is, first, the coordinates (X ₁ , Y ₁ ) of the position b ₁ corresponding to the number “4” input by the keyboard 6 are taken out from the storage device 9, and the current position b ₄ (X ₄ , Y ₄ ) is taken as X−. Distance to move the Y table 2 {(X ₄ −X ₁ ), (Y ₄ −Y ₁ )}
Is calculated to obtain target position information (step S ₁₃ ). Next, 1 is subtracted from the number "4" stored, to change the number "4" to the number "3" (Step S _14), the number is judged whether "0" (Step S ₁₅₎ . In this case, since the number is not 0, the process proceeds to step S ₅ , the driving devices 4X and 4Y are driven by the target position information obtained in step S ₁₃ , the XY table 2 moves to the position b ₁ , The driving device 4Z is driven to perform the drilling process.

Here, the return to the position b ₁ by conventional means, compare the return to the position b ₁ in the present embodiment. In the conventional means, the tape 5 is first returned in the reverse direction to the position b ₃
Reads the coordinates, the distance from the current position b ₄ to the position _{b 3 (X 4 -X 3)} , calculates the (Y ₄ -Y _3), although the X-Y table 2 to be connexion move. Then again tape 5
In the reverse direction, the coordinates of the position b ₂ are read, calculation is performed, and the XY table 2 is moved. Further, the tape 5 is returned in the reverse direction again, the coordinates of the position b ₁ are read, the calculation is performed, and the XY table 2 is moved to the position b ₁ . On the other hand, in this embodiment, the position b ₁
The coordinates are read, the calculation is performed, and the XY table 2 is moved.

Therefore, the time for moving the XY table 2 to the position b ₁ is greatly shortened as compared with the conventional means. Further, in the conventional means, the calculation and the movement are performed three times, and the errors of the calculation and the movement at each time may be integrated to cause a non-negligible error in the positioning of the position b ₁ . Since the calculation and movement are performed once, even if an error occurs, the error can be limited to only one such negligible error. These effects become more remarkable as the number of unprocessed positions increases.

Now, moving to the above processing, the XY table 2 is moved to the position b ₁
Move after the drilling has been carried out, again Step S _6, S
₇ , S ₁₃ is executed. In this case, in step S ₁₃ ,
Since the stored number is summer "3", position b ₄ from the third position b ₂ coordinate is taken out, the distance from the current position b ₁ is calculated. Thereafter, the number "3" is changed to the number "2" in the same manner, and the drilling of the position b ₂ is performed. Such a process is repeated, and the number stored at the time when the boring process at the position b ₃ is completed is “1”. Then, in step S ₁₃ , the position b ₄ corresponding to the number “1” is
The coordinate of is taken out and the target position information is obtained by the required calculation. Then, by subtracting 1 in step S _14, the stored number is "0". In step S ₁₅ , this number is “0”.
If so, the process proceeds to step S ₁₆ and the flag is reset. After that, in step S _{5, the} XY table 2 is moved to the position b ₄ based on the target position information obtained in step S ₁₃ , and drilling is performed.

By the above processing, so that a predetermined drilling has been performed on the raw position b ₁ ~b _4. Then, the process is step S
After step ₆ , the process proceeds to step S ₇ , but at this time, since the flag has been reset in step S ₁₆ in the previous process, the process proceeds to step S ₁ via step S ₈ , and thereafter, the position b is the same as the machining in the normal state. The position next to ₄ is read from the tape 5 and drilling is continued.

In this embodiment, as described above, the return time to the position b ₁ can be greatly shortened as compared with the conventional means, and
It is possible to prevent the positioning error at the position b ₁ .

In addition, in the description of the above embodiment, the boring process of the printed circuit board has been described as an example, but the present invention is not limited to this, and it is applicable to any processing machine that sequentially performs a predetermined process at a plurality of predetermined positions of a workpiece. Obviously it is possible. Further, it is obvious that the machine stop factor is not limited to the breakage accident of the drill, and may be another factor that causes unworking. In this case, the machine stop factor may be detected by a detection device, or may be visually detected by a staff member.

〔The invention's effect〕

As described above, in the present invention, the coordinates of the machining position are sequentially stored during machining, and when the machining is interrupted, when this is restored, the coordinates stored at the time of interruption are traced back to the designated number of coordinates. The machining is sequentially performed for each coordinate from that coordinate to the coordinate at the time of interruption, and then the machining according to the program is restarted, so that the machining machine can be accurately returned in a short time.

[Brief description of drawings]

FIG. 1 is a system diagram of a control device to which a method of controlling a punching machine for a printed circuit board according to an embodiment of the present invention is applied, FIG. 2 is a plan view of a part of the printed circuit board, and FIG. 3 is shown in FIG. 6 is a flowchart for explaining the operation of the control device shown. 1 ... Drilling machine, 2 ... XY table, 3 ... axis,
4X, 4Y, 4Z ... Driving device, 5 ... Tape, 6 ...
Keyboard, 7 ... NC device, 8 ... drill breakage detection device, 9 ... storage device, 11 ... printed circuit board.

Claims (1)

[Claims] 1. A method of controlling a machining machine, which drives a machining machine according to a predetermined machining program to sequentially machine a plurality of predetermined positions of a workpiece, and sequentially stores the coordinates of machining positions to be machined based on a machining command. When returning the machining interruption, the coordinates of the stored machining position are traced back by the number instructed based on the machining situation of the workpiece, and from the traced machining position to the machining position stored when the machining is interrupted. A method for controlling a machining machine, comprising: performing machining based on the stored coordinates of a machining position, and then resuming machining according to the machining program.