JP2013235424A - Controller of processing machine and method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a controller of a processing machine that cancels processing pretreatment and a delay time to eliminate processing delay by preliminarily outputting a movement source instruction from an instruction unit to an execution unit during processing pretreatment.SOLUTION: A controller 4 generates an instruction of a processing machine 1. The controller 4 includes an instruction unit 5 for reading a processing program and generating a movement source instruction and a processing tool source instruction, and an execution unit 6 for receiving the source instructions and outputting a movement execution instruction and a processing tool execution instruction. The instruction unit 5 eliminates occurrence of a delay time DT by shortening a processing pretreatment instruction time and performing previous output of the movement source instruction and the processing tool source instruction to the execution unit 6.

Description

  The present invention relates to a control device for a processing machine and a method thereof, and more particularly, a movement source command from a command unit is output in advance to an execution unit during the main processing pre-processing time, thereby canceling the main processing pre-processing and the delay time. The present invention relates to a processing machine control apparatus and method for eliminating processing delay.

  As shown in FIG. 5, the arrows ARB and ARC are conventionally used in the main processing (processing for actually cutting a part, etc.) after the main processing pre-processing (piercing, gas switching, copying on, etc.) indicated by the arrow ARA. The operation was started with a delay.

  Specifically, the command unit SB outputs a movement source command IMA and a beam source command BMA. In FIG. 5, the movement source command IMA has a vertical axis as speed and the horizontal axis as a time passage axis, and the beam source command BMA shows a vertical axis as an output and the horizontal axis as a passage of time.

  On the other hand, the execution unit JB outputs a movement actual command IJA and a beam actual command BJA. In the movement source command IJA, the vertical axis represents speed and the horizontal axis represents time passage axis, and the beam actual command BJA represents the vertical axis as output and the horizontal axis represents passage of time.

  Explain along the passage of time. First, on the time axis, the beam source command (piercing processing of the main processing pre-processing) BMA is sent from the command unit 5 at a timing indicated by line A to a predetermined time TA (time between lines A and B). )Output. Synchronously with this command, the actual beam command BJA of the execution unit 6 is output for a predetermined time TA (time between lines A and B). Subsequently, at the timing of line B, gas switching, copying (referring to moving the machining head to an appropriate position with respect to the height of the surface of the workpiece W), etc., is “ON” as the main processing pre-processing. .

  Thereafter, on the time axis, the movement source command IMA is output from the command unit SB at the timing of the time indicated by the line C, and the beam source command BMA is output at the same timing. In response to this command, the execution unit 6 outputs a movement actual command IJA at a timing indicated by the line D of the execution unit 6 with a delay time DT (a time between the line C and the line D indicated by the arrow ARB). Further, the beam actual command BJA is also output with a delay by the delay time DT (the time between the line C and the line D indicated by the arrow ARC). As a result, actual processing (cutting processing of parts or the like) is delayed with the time indicated by the line E.

  Japanese Patent Application Laid-Open No. 2004-151561 discloses a technique for commanding an axis command and a laser oscillation command as one set at the same timing. In addition, a technique for synchronizing the axis movement and the laser command by independently controlling the laser oscillator command among the command timing is disclosed. Further, see Patent Document 2.

Patent No. 4436809 Japanese Patent No. 34059797

  When the system configuration according to the conventional technique is adopted, a delay time from the command to the start of the axis movement always occurs. For this reason, there is a problem that the start of the main processing is delayed and the high speed of the processing machine is impaired, and as a result, the tact time is reduced. An object of the present invention is to improve the delay of a command.

  The present invention is for solving the above-mentioned problems, and the invention according to claim 1 is a control device that generates a command for a processing machine, a command for reading a machining program and generating a movement source command and a machining tool source command. And an execution unit that receives these original commands and outputs a movement actual command and a machining tool actual command, and the command unit shortens the output time of a specific command, and the movement source command and the machining tool source command Are output in advance to the execution unit.

 The invention according to claim 2 is characterized in that the output time of the specific command is a time related to the main processing preprocessing command, and the main processing preprocessing command to which time information is added is output in advance.

 The invention according to claim 3 is characterized in that at least one of the axes moving in the X and Y directions according to the actual movement command is controlled so as to enable the first movement and the second movement. .

 The invention according to claim 4 is a control method for generating a command for a processing machine, wherein the command unit reads a machining program and generates a movement source command and a machining tool source command, and an execution unit receives and moves these original commands. Outputting a real command and a machining tool actual command, wherein the command unit shortens an output time of a specific command and outputs the movement source command and the machining tool source command in advance to the execution unit. Features.

  According to the present invention, the delay time of the execution unit of the conventional system is eliminated by wrapping it with the main processing pre-processing (piercing, gas switching, copying on, etc.) time. That is, the main processing preprocessing information passed from the command unit to the execution unit is shortened, the axis movement source command and the processing tool source command are output first as a set, and then the time control of the main processing preprocessing is performed. Since the process between the delay times DT is executed during this period, it is possible to perform processing without the delay time DT.

It is the schematic which shows the general relationship between the machine main body and control apparatus in a processing machine. It is the schematic which shows the outline of a relationship between the process head and each axis | shaft in a processing machine. It is explanatory drawing explaining cooperation with a control apparatus and an actuator. It is explanatory drawing explaining operation | movement of a command part and an execution part. It is a prior art explaining a prior art.

  Embodiments of the present invention will be described below with reference to the drawings.

  Please refer to FIG. A processing machine (or machine tool or the like) 1 includes a machine main body 2, an actuator 3, and a control device 4. The control device 4 is configured by a computer, and includes a computer main body, a display device, a keyboard, a mouse, and the like. The control device 4 includes a command unit 5 and an execution unit 6.

  In this example, the processing machine 1 includes, for example, a laser processing machine or a combined machine of a laser processing machine and another machine (for example, a turret punch press). In the machine body 2, a control device 4 generates a command value from a machining program created by a user, and operates a plurality of actuators 3. By this operation, the tool and the member to be processed are moved to perform desired processing.

  The actuator 3 is one that controls the position, speed, acceleration, and the like based on a command from the control device 4 and generates power for a desired operation in a connected drive machine. It is attached to the processing machine main body 2 and connected to a drive mechanism.

  The control device 4 refers to the entire hardware for generating and driving a command for operating the actuator 3 from a machining program or the like. It may be attached to the processing machine main body 2 or may be placed separately.

  The command unit 5 is a part of software installed in the control device 4. Then, the machining program is decoded to generate a movement command for each axis and a command to a machining tool (laser or the like). The execution unit 6 is a part of software installed in the control device 4. Then, a command is received from the control software (command unit 5), and thereafter, the movement command of each axis and the machining tool command are adjusted so as to satisfy an appropriate machining condition, and the command is output.

  In this example, the machining program is a concept that includes all numerical control data such as an NC program and includes all of commands, data, and the like for controlling the machining machine 1.

  Please refer to FIG. The processing machine (laser processing machine or the like) 1 moves and positions the laser processing head 2F to an arbitrary position in the XYZ axis direction, and processes a large number of parts from a work W (not shown) supported by a work support member. Since it is already well known, only an outline will be described.

  The machine body 2 of the processing machine 1 includes a square annular support frame 2A. The support frame 2A is disposed above a work table (not shown, meaning all supporting the workpiece W) that supports a relatively large plate-shaped workpiece W to be processed. A guide rail 2 </ b> B extending in the X-axis direction is laid on the upper surface.

  An X-axis moving carriage 2C that is moved and positioned in the X-axis direction via a transmission mechanism such as a ball screw by driving the first X-axis servomotor 3A is supported on the guide rail 2B so as to be movable in the X-axis direction. A guide rail 2D extending in the Y-axis direction is laid on the X-axis moving carriage 2C, and the Y-axis carriage 2E is supported so as to be movable in the Y-axis direction.

  The Y-axis carriage 2E is moved and positioned in the Y-axis direction via a transmission mechanism such as a ball screw mechanism by driving a Y-axis servo motor 3B mounted on the X-axis moving carriage 2C. On this Y-axis carriage 2E, an X-axis slider 2G provided with a laser processing head 2F for performing laser processing on the workpiece W is adjustable in the Z-axis direction so as to be movable in the X-axis direction.

  This X-axis slider 2G is movable in the X-axis direction in a relatively small limited area, and this X-axis slider 2G drives the second X-axis servo motor 3C mounted on the Y-axis carriage 2E. Therefore, it is configured to be moved and positioned in the X-axis direction via a ball screw or the like. In other words, in this embodiment, the X-axis direction can be moved twice.

  Here, the configuration for guiding the laser beam from an appropriate laser oscillator to the laser processing head 2F, the configuration for guiding the assist gas to the laser processing head 2F, and the like may be the same as the normal configuration. The detailed description of is omitted.

  In the above configuration, when laser machining of a large workpiece W supported on the workpiece table is performed, the first X-axis servo motor 3A is controlled to move and position the X-axis moving carriage 2C to a position corresponding to the desired position of the workpiece W. Thereafter, the Y-axis carriage 2E is moved in the Y-axis direction, the X-axis slider 2G is moved in the X-axis direction, and the laser beam is irradiated from the laser processing head 2F to the workpiece W, thereby laser processing at a desired position of the workpiece W. Can be performed.

  In this case, the Y-axis carriage 2E is relatively small and lightweight, and the X-axis slider 2G and the like are also small and light, and both have a relatively small movement range. Even if the slider 2G is moved at a high speed, the high accuracy of laser processing can be maintained, and high speed and high accuracy processing can be performed.

  In addition, although the structure which can operate | move for 1 axis | shaft (X axis) by 2 axes | shafts was shown, you may operate | move 2 axis | shafts (XY axis | shaft) command by 2 axes | shafts (total 4 axes), respectively. Of course, a laser processing machine that moves in one axis with respect to the X axis and in two axes with respect to the Y axis may be used.

  Please refer to FIG. The delay time DT at the time of cooperation between the control device 4 and the actuator 3 will be described. As described above, the control device 4 reads the machining program and generates a movement source command IM and a machining tool source command (for example, a beam source command) BM, and receives these original commands and performs predetermined processing to move them. And an execution unit 6 that outputs an actual command IJ and a machining tool actual command (such as a beam actual command BJ).

  Here, the movement source command IM in the command unit 5 is a command for moving a shaft (such as the shaft of the laser processing head 2F) to a predetermined position, and the beam source command BM is a command for outputting a laser processing command. On the other hand, the actual movement command IJ of the execution unit 6 performs axis command division processing, delay processing, etc., and drives actual actuators (first X, second X axis servo motors, other Y axis servo motors, etc.). It is a command for. The actual beam command BJ is a command or the like for optimizing output power, duty, gas type, etc. and actually irradiating the beam.

  On the other hand, a delay time DT occurs in the section (execution unit 6) indicated by the arrow in FIG. Therefore, the command unit 5 eliminates the occurrence of the delay time DT by outputting the movement source command IM in advance from the execution unit 5. The delay time DT refers to a delay time that occurs during output from the command unit 5 to the execution unit 6.

  Please refer to FIG. Operations of the command unit 5 and the execution unit 6 will be described. The command unit 5 outputs a movement source command IM and a beam source command BM. In FIG. 4, the movement source command IM has a vertical axis as speed and the horizontal axis as a time passage axis, and the beam source command BM shows a vertical axis as an output and the horizontal axis as a passage of time.

  On the other hand, the execution unit 6 outputs a movement actual command IJ and a beam actual command BJ. In the movement actual command IJ, the vertical axis represents speed and the horizontal axis represents time passage axis, and the beam actual command BJ represents the vertical axis as output and the horizontal axis represents time passage.

  In this case, description will be made along the passage of time. First, on the time axis, the beam source command BM is output from the command unit 5 at the timing of the time indicated by the line L1. In synchronization with this command, the execution unit 6 outputs a beam actual command BJ.

  Here, the output time T1 of the beam source command (the piercing command included in the main processing preprocessing indicated by the arrow AR2) is the actual output time T2 (that is, the actual piercing time between the line L1 and the line L3). Shorter output.

  The development of the main processing preprocessing command to which the time information is added will be described in detail. The time information actually output (that is, information on the piercing time T2 longer than the output time indicated by the time information T1 in the command unit 5) is added to the command (beam source command BM) and transmitted to the execution unit 6. Then, in the beam actual command BJ of the execution unit 6, the added time information T2 is acquired and output for the added time. As a result, the actual beam command BJ of the execution unit 6 is output for a time T2 longer than the output time T1. For this reason, the output time of the command unit 5 can be shortened to T1 without changing the time of the beam actual command BJ of the execution unit 6 (time indicated by T2). Then, the remaining time (that is, T2-T1) of the shortened time is used to eliminate the delay time DT.

  In addition to the time information, the output size, frequency, duty, gas type, and gas pressure can be included.

  Subsequently, at the timing when the piercing processing command for the main processing pre-processing ends, gas switching, copying, etc. as the main processing pre-processing are turned “ON”.

  Subsequently, the movement source command IM (approach command) is output from the command unit 5 at the timing of the time indicated by the line L2 on the time axis (timing preceding the time from the line L4 to the line L2 as indicated by the arrow AR1). The beam source command BM is output at the same timing. That is, a “movement source command” and a “machining tool source command (beam source command)” are output as a set.

  In response to this command, the execution unit 6 receives the movement actual command IM at the timing indicated by the line L4 of the execution unit 6 with a delay of the delay time DT (the timing when the time is delayed from the line L2 to the line L4 as indicated by the arrow AR3). Output. The beam actual command BJ is also output at the same time delay. As a result, the preceding time and the delay time are offset, and actual processing (approach, part cutting, etc.) at the time indicated by the line L4 or the line L5 and thereafter is executed without delay.

  As a result, the main machining pre-processing information passed from the command unit to the execution unit is shortened, the axis movement source command is output first, and then the time control of the main machining pre-processing is performed by the execution unit, during which the delay time Since this process is executed, there is an effect that machining without a delay time becomes possible.

  The present invention is not limited to the embodiments of the invention described above, and can be implemented in other modes by making appropriate modifications.

DESCRIPTION OF SYMBOLS 1 Processing machine 2 Processing machine main body 2A Support frame 2B Guide rail 2C X-axis movement carriage 2D Guide rail 2E Y-axis carriage 2F Laser processing head 3 Actuator 3A 1st X-axis servo motor 3B Y-axis servo motor 3C 2nd X-axis servo motor 4 Control Device 5 Command unit 6 Execution unit W Workpiece

Claims (4)

In a control device that generates commands for processing machines,
A command unit that reads a machining program and generates a movement source command and a machining tool source command, and an execution unit that receives these source commands and outputs a movement actual command and a machining tool actual command,
The said control part shortens the output time of a specific instruction | command, The said movement origin instruction | command and the said processing tool former instruction | command are output ahead of time with respect to an execution part, The control apparatus of the processing machine characterized by the above-mentioned.   2. The processing machine control device according to claim 1, wherein the output time of the specific command is a time related to the main processing preprocessing command, and the main processing preprocessing command to which time information is added is output in advance. .   3. The control according to claim 1, wherein at least one of the axes moving in the X and Y directions according to the actual movement command is controlled to enable a first movement and a second movement. 4. Control device for processing machines. In a control method for generating a command for a processing machine,
A command unit reads a machining program and generates a movement source command and a machining tool source command; and an execution unit receives these original commands and outputs a movement actual command and a machining tool actual command.
The said command part shortens the output time of a specific command, The said movement origin instruction | command and the said processing tool former instruction | command are output in advance with respect to an execution part, The control method of the processing machine characterized by the above-mentioned.

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