JP2680955B2 - Drilling restart control method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to numerical control (hereinafter referred to as N
Called C. ), The method for controlling the restart of the drilling of a drilling machine, in particular, in a drilling machine for printed wiring board (hereinafter referred to as PCB) processing, when the drilling is temporarily interrupted due to a power failure or the like, the restarting of the drilling is controlled. NC
The present invention relates to a drilling restart control system for a drilling machine.

[0002]

2. Description of the Related Art In this type of NC drilling machine, a PC
Drilling data that specifies the diameters of various holes to be formed in a workpiece such as B, that is, the diameters of the drill blades, and the positions of the holes having those diameters are sequentially input from a host computer or a storage medium. , The position of the drill blade on the X-axis-Y-axis plane and the movement in the Z-axis direction are controlled in response to the drilling data, and drilling is performed.

When machining is temporarily interrupted due to a power failure or the like while the drilling is in progress, when the machining is restarted, the diameter of the drill blade, the position on the X-axis-Y-axis plane, and the Z-axis direction. The position must be returned to the state just before the suspension.

However, in the first example of this type of NC drilling machine according to the prior art, the operator cannot return to the state immediately before the temporary interruption, so that the operator was working immediately before the temporary interruption. It returns to the starting position of the first drilling with the drill blade and restarts drilling. Also,
In the second example of this type of NC drilling machine according to the prior art, that is, in the NC drilling machine proposed in JP-A-59-142613 "Numerical control machining resumption control device", the diameter of the above-mentioned drill blade is Machining format data (including modal data in this publication No. 59-142613), a sequence attached to each path of movement on the X-axis-Y-axis plane and movement of the drill blade in the Z-axis direction. number,
The latest information on the position on the X-axis-Y-axis plane and the position in the Z-axis direction, detailed information such as the presence or absence of processing completion for the drilling position, in parallel with the processing, for each hole to be drilled, Stored in non-volatile memory. When a command to restart machining is given after a temporary interruption, the above detailed information stored in the nonvolatile memory immediately before the interruption is read out from the nonvolatile memory to perform drilling. The state is returned to the state immediately before the interruption based on the detailed information, and the drilling process is restarted from that state.

[0005]

In the first example of the above-mentioned conventional NC drilling machine, the operator returns to the starting position of the first drilling by the drill blade which was being machined immediately before the temporary interruption, Since the drilling process is restarted, the drilling process for the drill blade will be repeated twice until the hole immediately before the above-mentioned temporary interruption is reached. Not only does the shape change cause product defects and breakage of the drill blade, but it also lengthens the time required for processing.

A second example of the conventional NC drilling machine is
It is necessary to store the above detailed information such as modal data and sequence number in the above non-volatile memory for each hole to be drilled as the machining progresses, increasing the type and amount of data to be stored. At the same time, the NC program becomes complicated and the number of steps of the NC program for each drilling greatly increases. Therefore, when it is necessary to make a large number of holes like a printed wiring board,
This increase in the type and amount of data does not impair the response speed of the entire NC device, making it difficult to increase the processing speed. further,
The second example of this conventional NC drilling machine needs to be configured to be able to correctly restart all of the sequence numbers assigned to the above-mentioned movement paths. Therefore, the NC program requires various restart points, resulting in a complicated structure and a large number of development steps. Especially when the whole NC processing can be simplified, such as when the work piece is a PCB,
In the NC drilling machine of the above-mentioned publication No. Sho 59-142613,
The entire system is too complicated, which is detrimental to improving the cost / performance ratio.

Therefore, an object of the present invention is to perform a restarting control of a NC drilling machine capable of quickly restarting the processing after a temporary interruption due to a power failure or the like without involving redundant processing. To provide a method.

Another object of the present invention is to achieve the above-mentioned rapid restart of machining easily without significantly increasing the number of steps of the NC program.
It is to provide a drilling restart control system for a C drilling machine.

[0009]

According to a first aspect of the present invention, there is provided a numerically controlled hole punching restart control method, wherein a plurality of holes having a plurality of diameters to be drilled are formed in a thin flat plate-shaped workpiece. And a plurality of positions on the workpiece, the source of the drilling data defined in the form of a data block, the drilling data is processed for each data block, and the drilling operation indicated by the data block is performed on the workpiece. Machining data providing means for supplying a driving signal to the drilling machine as applied to the workpiece, and position data supplying means for supplying the machining data providing means with the current position of the tool mounted on the drilling machine,
A power failure protection memory for temporarily storing the diameter of the hole and the number of holes formed by the diameter, and instructing the processing data giving means to start the hole drilling and restart it after a temporary interruption due to a power failure or the like. In response to the processing start instructing means and the instruction from the processing start instructing means, the drilling data from the supply source is compared with the stored contents of the power failure protection memory, and when a match is detected, a match signal is output. And a means for holding the drilling processing until the coincidence signal is generated after receiving the instruction from the processing start instruction means.

Further, the hole re-starting control system of the numerically controlled hole punching machine of the second invention is such that in order to make a plurality of holes having a plurality of diameters in a thin flat plate-like workpiece such as a printed wiring board, A hole diameter block for each hole diameter that indicates the diameter of the drill blade, a drilling block that indicates the drilling position for each hole to be drilled, and a drilling data input unit that supplies drilling data including an end block, and the supplied said If the drilling data is the hole diameter block, a drive signal is supplied so that the drill blade having the designated diameter is gripped, and if the drilling block is the drilling block, the designated drilling processing is performed on the workpiece. And a drive signal for causing the drill blade gripping spindle to grip the drill blade, and on the X-axis-Y-axis plane and on the Z-axis. A drilling machine that moves to perform drilling on the workpiece, a memory with power failure protection that temporarily stores the diameter of the drill blade being processed and the number of holes formed by that diameter, and the start of processing In response to the instruction, the drilling data input means sequentially inputs each block of the drilling data to judge, and if it is the hole diameter block, it is given to the machining data giving means and the diameter of the power failure protection memory. Update of the number of holes and initialization of the number of holes, and if it is the drilling block, it is given to the processing data adding means and the update of the number of holes of the power failure protection memory is instructed. For example, in the case of the hole diameter block, the diameter of the power failure protection memory is updated to determine the number of holes by the input processing means for instructing the end of the operation and the instruction from the input processing means. In the case of the drilling block, counting processing means for increasing the number of holes in the memory with power failure protection, and the drilling data input means through the input processing means in response to a restart instruction after interruption of machining The drilling data is sequentially input from the beginning, and while the drilling process of the drilling machine is stopped, the drilling block is counted every time there is the drilling diameter block through the counting processing means, and the entered drilling diameter block indicates After the diameter and the diameter of the power failure protection memory match, when the number of holes that have been input and the number of holes of the power failure protection memory that match, when the number of holes for the power failure protection is the next Processing restart processing means for starting the drilling and returning to a normal operation according to the processing start instruction.

Further, in the drilling restart control system of the third invention, a hole diameter value is stored in a non-volatile memory for each hole diameter to be drilled by a start instruction, and is stored in the non-volatile memory. Initialize the memory value of the number of holes, sequentially input the data blocks of the drilling data, send the processing data that controls the hole position according to the contents of the data block to the drilling machine, and perform the drilling by the drilling machine. Then, for each drilling process, after counting up and updating the hole number storage value of the nonvolatile memory, by shifting to the reading of the next data block, the above-described normal drilling operation is repeated, The data blocks are sequentially input from the beginning by a restart instruction after a temporary interruption due to a power failure, and the input data blocks are stored in the nonvolatile memory. Until the number of holes of the hole diameter value and the same hole diameter and the hole diameter and the number of holes stored value, after the hole position control without drilling by the drilling machine,
It is configured by shifting from the subsequent input of the data block to the above-described normal drilling operation for carrying out drilling.

[0012]

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention. Referring to FIG. 1, the NC device 1 shown in this figure
Controls a drilling machine 2 for drilling a flat work piece such as a PCB according to processing data including data for specifying a diameter of a hole to be formed and a position of the hole.

The NC device 1 has a counting processing means 11, which is usually formed by an NC program executed by the processor 10, an input processing means 12, and a machining restart processing means 13, and also has a host computer 3 and A drilling data input means 14 for receiving input drilling data from a storage medium 4 (such as a flexible disk);
A memory 15 for storing the C program, the input drilling data, the drilling data to be protected against power failure, etc., a machining data giving means 16 for giving the machining data to the drilling machine 2,
An operation control circuit 19 for controlling the RT display 17 and the keyboard 18 is provided.

The punching data input means 14 also includes a communication control circuit 141 for controlling data communication with the host computer 3 and a medium driving device 142 for driving the storage medium 4.
And The medium driving device 142 and the storage medium 4 may be constituted by not only a flexible disk but also a cassette magnetic tape, a hard disk, an optical disk, or the like.

The memory 15 is a ROM 151 which is a non-volatile memory for storing the NC program, a non-power failure protection RAM 152 which is a volatile memory for temporarily storing the input drilling data, and is protected even when a power failure occurs. RA with power failure protection by a battery that temporarily stores some data that should be
And M153. This RAM with power failure protection
153 may be replaced with a non-volatile memory.

The processing data assigning means 16 includes an X axis, a Y axis,
An axis control circuit 161 that controls each of the Z axes, and a servo amplifier 16 that amplifies a signal representing the amount of movement of each axis supplied from the axis control circuit 161 and sends the amplified signal to the drilling machine 2.
2-1 to 162-N and a current position counter 163 that counts the current position by receiving the position counting signal from the puncher 2.
And an input / output control circuit 164 that drives the drill in response to the input drilling data.

The hole punching machine 2 includes the servo amplifier 162-.
Servo motors 21-1 to 21-N which operate in response to the servo motors 16-1 to 162-N, respectively, and servo amplifiers 162-1 to 16-1 by detecting the moving speeds of these servo motors.
62-N speed detector 22-1, which feeds back to
22-N, position detectors 23-1, 23-23-N that send position counting signals proportional to the movement amounts of the servo motors 21-1, 21-N to the current position counter 163, and input / output control. And a tool control mechanism 24 that controls gripping and rotation of the drill blade in response to signals from the circuit 164.

FIG. 2 is a flow chart showing an example of the operation of the embodiment shown in FIG.

Next, referring also to FIG. 2, first, NC
When the operator receives a start instruction of a normal drilling operation input to the operation control circuit 19 by the operator operating the keyboard 18 while looking at the CRT display 17, the processor 10 of the apparatus 1 outputs the drilling data from the input processing means 12. One block is requested to the punching data input means 14. In response to this, when the drilling data is sequentially supplied to the drilling data input means 14 from the host computer 3 or the storage medium 4 block by block, the processor 10 supplies the drilling data to the machining data providing means 16 ( Step S1).

Further, the input processing means 12 judges for each block of the input drilling data whether or not it is a hole diameter block for instructing a hole diameter change, and when it is a hole diameter block, its content is counted processing means. It is also supplied to 11 (step S2).

Upon receiving the supply of the hole diameter block, the machining data giving means 16 causes the drilling machine 2 to cause the drill blade gripping spindle to grip the drill blade corresponding to the hole diameter designated by the block. That is, the axis control circuit 161 sends a movement signal through the servo amplifiers 162-1 to 162-N, and while confirming the current position by the current position counter 163, the servo motors 21-1 to 21-N correspond to the above hole diameters. Drive the spindle to the position of the drill blade. At this time, the speed detectors 22-1 to 22-N feed back the moving speeds to the servo amplifiers 162-1 to 162-N, respectively, while the position detectors 23-1 to 23-N correspond to the moving amounts. The position count signal of is fed back to the current position counter 163. The input / output control circuit 164 controls the tool control mechanism 24 to drive the spindle so that the spindle holds the drill blade corresponding to the hole diameter. Further, the counting processing means 11 stores the hole diameter value instructed by the hole diameter block in the RAM 153 with power failure protection of the memory 15 and has no power failure protection RAM.
The hole count value n of 152 and the hole count storage value N of the RAM 153 are initialized to "0", and then the process returns to step S1 (step S3).

When the block of the input drilling data is not the hole diameter block, the input processing means 12 judges whether the block is the end block indicating the end of the drilling block, and when it is the end block, the processing data adding means. 16 and the drilling machine 2 to return the drill blade (reverse operation to the preparation of the drill blade) to stop the machining operation, and finish the drilling data input operation (step S).
4).

When the block of the input drilling data is neither the hole diameter block nor the end block, the input processing means 12 judges this as a drilling block and supplies it to the machining data giving means 16. The axis control circuit 161 of the machining data providing means 16 creates machining data in response to the drilling block and sends the machining data to the drilling machine 2. That is, the axis control circuit 161 is the servo amplifier 16
A spindle movement signal is sent to the drilling machine 2 through 2-1 to 162-N, and the current position is checked by the current position counter 163 which receives the position counting signal corresponding to the movement amount from the drilling machine 2 (step S5).

In this way, the drilling machine 2 drills one hole according to each of the machining data. That is, the servo motors 21-1 to 21-N move the spindle to the position for processing data and move it up and down, and the speed detector 22
-1, ~ 22-N and position detectors 23-1, ~ 23-
A predetermined drilling operation is performed by feeding back the speed and the movement amount by N (step S6).

The counting processing means 11 counts up the hole count value n of the RAM 152 by "1", and at the same time, R
The hole number storage value N of the AM 153 is updated to the hole number count value n after counting up, and the process returns to step S1 (step S1).
7).

When resuming machining after a temporary interruption due to a power failure or the like, the operator operates the keyboard 18 while looking at the CRT display 17 after returning the drilling machine 2 to the starting position of the machining operation. An instruction to restart the drilling operation is input to 19. In response,
The processing restart processing means 13 of the processor 10 fetches the above-mentioned drilling data block by block from the beginning from the computer 3 or the storage medium 4, thereby inputting the processing means 12.
The drilling data input means 14 is instructed through (step S8).

The machining restart processing means 13 determines whether or not each of the blocks of the input drilling data is a hole diameter block, and the hole diameter value designated by the hole diameter block is stored in the RAM 153. The value, that is, whether or not it matches the hole diameter value immediately before the suspension is detected. If the block is not a hole diameter block, or if it does not match the hole diameter value immediately before the temporary interruption, immediately perform step S.
Returning to step 8, the next block is input from the drilling data input means 14. If there is a match with the hole diameter value immediately before the temporary suspension, the spindle holds the drill blade corresponding to the hole diameter and drives the spindle, and the process proceeds to the next step S10 (step S9).

Next, the machining restart processing means 13 initializes the hole number count value n of the RAM 152 to "0" through the counting processing means 11 (step S10), and through the input processing means 12, drilling data. The input unit 14 is made to input a drilling block which is one block of the following drilling data (step S11).

Further, the machining restart processing means 13 causes the machining data giving means 16 to control the hole position according to the drilling data while the drilling operation of the drilling machine 2 is stopped (step S12). At this time, if the drilling data displays the drilling position as an absolute position, it is sufficient to retain the response to that data for one block, but it is displayed as an increment value based on the previous drilling position. If so, the drill blade is once driven to the drilling position. However, driving of drilling by the vertical movement of the spindle is omitted.

The machining restart processing means 13 then uses the counting processing means 11 to set the hole count value n of the RAM 152 to 1.
Just count up (step S13). The processing restart processing means 13 then determines the hole count value n of the RAM 152.
And whether there is a match between the hole number storage value N of the RAM 153 with power failure protection is detected. If they do not match (N> n), the data processing relating to the hole-drilling block is finished and step S
Returning to step 11, the drilling data input means 14 is caused to load the next drilling block from the computer 3 or the storage medium 4 through the input processing means 12. On the other hand, if the above two numerical values match (N = n), the process returns to step S1 and the input processing means 12 shifts to the input of one block of the next drilling data to restart the normal drilling operation. (Step S14).

[0032]

As described above, the NC according to the present invention
The drilling restart control method of the drilling machine can restart the drilling after a temporary interruption due to a power outage, etc. with a simple structure and quickly to achieve duplicated machining, so product defects and breakage of the drill blade occur. In addition, the re-machining time can be greatly reduced because the re-machining operation is not performed on the processed hole.

Further, according to the drilling restart control system of the NC drilling machine according to the present invention, the above-mentioned quick restarting of machining is NC.
Since this can be easily achieved without complicating the program and increasing the number of steps, it is possible to reduce the man-hours for developing the NC program.

[Brief description of the drawings]

FIG. 1 is a block diagram of one embodiment of the present invention.

FIG. 2 is a flowchart of an example of operation of the embodiment of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 NC device 2 Drilling machine 3 Host computer 4 Storage medium 10 Processor 11 Counting processing means 12 Input processing means 13 Processing restart processing means 14 Drilling data input means 15 Memory 16 Processing data giving means 17 CRT display 18 Keyboard 19 Operation control circuit 21-1, ~ 21-N Servo motor 22-1, ~ 22-N Speed detector 23-1, ~ 23-N Position detector 24 Tool control mechanism 141 Communication control circuit 142 Medium drive circuit 151 ROM 152 No power failure protection RAM 153 Power failure protection RAM 161 Axis control circuit 162-1 to 162-N Servo amplifier 163 Current position counter 164 Input / output control circuit

Claims (3)

(57) [Claims] 1. Drilling for defining a plurality of holes of a plurality of diameters to be drilled in a thin flat workpiece, in the form of a data block indicating the diameter of the holes and the plurality of positions on the workpiece. A source of data, processing data providing means for supplying a driving signal to a drilling machine so as to process the drilling data for each data block and perform drilling processing indicated by the data block on the workpiece, Position data supply means for supplying the current position of the tool mounted on the drilling machine to the processing data providing means, and a memory with power failure protection for temporarily storing the diameter of the hole and the number of holes machined and formed with the diameter. In response to the instruction by the processing start instruction means for instructing the processing data giving means to restart the hole drilling and restart after a temporary interruption due to a power failure, Comparing the drilling data from the supply source with the stored contents of the power failure protection memory, means for generating a match signal when a match between the two is detected, and the processing start instructing means before receiving the instruction, And a means for holding the drilling process until a coincidence signal is generated, the drilling restart control system for a numerically controlled drilling machine. 2. A hole diameter block for indicating a hole diameter, that is, a diameter of a drill blade, for drilling a plurality of holes having a plurality of diameters in a thin flat plate-like workpiece such as a printed wiring board. A drilling block for instructing a drilling position for each power hole, and a drilling data input means for supplying drilling data including an end block, and the drilling data supplied is a drill of a designated diameter if the drilling block is the hole diameter block. If the drilling block is used to grip the blade, processing data providing means for supplying a driving signal to each of the drilling blocks to perform the instructed drilling processing on the workpiece, and the driving signal to the drill blade gripping spindle. A drilling machine that grips the drill blade and moves on the X-axis-Y-axis plane and on the Z-axis to perform drilling on the workpiece, A power failure protection memory that temporarily stores the diameter of the drill blade in question and the number of holes formed by that diameter, and each block of the drilling data in the drilling data input means according to a machining start instruction. If it is the hole diameter block, it is given to the machining data giving means, and at the same time, it is instructed to update the diameter of the memory with power failure protection and initialize the number of holes. If there is any, it is given to the processing data giving means and an instruction to update the number of holes of the memory with power failure protection is given, and if it is the end block, an input processing means for giving an instruction to end the operation, and the input processing means According to the instruction, if it is the hole diameter block, the diameter of the power failure protection memory is updated to initialize the number of holes, and if it is the hole drilling block, the power failure protection memory hole Counting means for increasing the number and, in response to a restart instruction after interruption of machining, cause the drilling data input means to sequentially input the drilling data through the input processing means from the beginning to perform drilling of the drilling machine. While stopped, counting the drilling block every time there is the hole diameter block through the counting processing means, after the diameter indicated by the input hole diameter block and the diameter of the memory with power failure protection match,
When the number of the entered drilling blocks and the number of holes of the memory with power failure protection match, start the drilling process of the drilling machine from the next input of the drilling block, and the normal operation by the start instruction of the drilling is performed. A restarting control method for a numerically controlled drilling machine, comprising: a restarting processing means for returning to operation. 3. According to a start instruction, a hole diameter value is stored in a non-volatile memory for each hole diameter to be drilled, and the number-of-holes stored value stored in the non-volatile memory is initialized. Data blocks are sequentially input, processing data for performing hole position control based on the contents of the data blocks is sent to a drilling machine, and drilling processing is performed by the drilling machine. For each drilling process, the nonvolatile memory After counting up and updating the hole number storage value of, by moving to the reading of the next data block, the above-described normal drilling operation is repeated, by a restart instruction after a temporary interruption due to a power failure, The data blocks are sequentially input from the beginning, and the hole diameter value and the hole number storage value stored in the nonvolatile memory in the input data block are the same as the hole diameter values. And the number of holes of that hole diameter is reached, after performing the hole position control without performing the drilling process by the drilling machine, the subsequent normal drilling process operation for executing the drilling process from the input of the data block is performed. A drilling restart control method characterized by: