JP2018001369A - Control device and method for machining tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control device and a method of a processing machine capable of optimally controlling a processing machine by enabling highly accurate detection of a contact state of a head portion with respect to a work. SOLUTION: This is a control device of a processing machine that processes a work 3 by bringing a head portion 30 into contact with the work 3, and has a displacement meter 50 for detecting the amount of displacement of the head portion 30 with respect to the work 3 and a displacement meter 50. A calculation processing device 70 and a calculation processing device that calculate the unit displacement amount of the head unit 30 per unit time from the displacement amount detected in 1 and analyze the contact state of the head part 30 with respect to the work 3 from the calculated unit displacement amount. It includes a control unit 60 that controls the ultrasonic melt joining device 100 based on the result of calculation and analysis by 70. [Selection diagram] Fig. 1

Description

  The present invention relates to a control apparatus and method for a processing machine that processes a workpiece by bringing the head portion into contact with the workpiece, and more particularly, a contact state of the head portion with respect to the workpiece based on an output of a linear scale that detects a displacement amount of the head portion. The present invention relates to a processing machine control apparatus and method for controlling a processing machine by calculating and analyzing the above.

  An example of a processing machine that processes a workpiece by bringing the head portion into contact with the workpiece is an ultrasonic fusion bonding apparatus. This ultrasonic fusion bonding apparatus performs bonding of a bonding target portion by applying ultrasonic vibration and a load to the bonding target portion.

  Conventionally, in such an ultrasonic fusion bonding apparatus, a technique disclosed in Patent Document 1 is known as a method for detecting contact of a head portion with a workpiece.

  In the ultrasonic fusion bonding apparatus disclosed in Patent Document 1, a configuration is described in which contact of a head portion with a work is detected by a load cell.

  However, the load cell has a low response due to the strain gauge method, and is detected after the strain gauge is deformed. Therefore, the contact state of the head with respect to the workpiece is detected with high sensitivity by capturing the moment when the head contacts the workpiece. It is difficult to detect with high accuracy.

JP 2006-086345 A

  SUMMARY OF THE INVENTION An object of the present invention is to provide a processing machine control device and method that can detect a contact state of a head portion with respect to a workpiece with high accuracy so that the processing machine can be optimally controlled.

  In order to achieve the above object, the invention of claim 1 is a control device for a processing machine for processing a workpiece by bringing the head portion into contact with the workpiece, and detecting a displacement amount of the head portion relative to the workpiece. A unit displacement amount of the head unit per unit time is calculated from the displacement amount detected by the displacement amount detection unit and the displacement amount detection unit, and the contact state of the head unit with respect to the workpiece is calculated from the calculated unit displacement amount. And a processing machine control means for controlling the processing machine on the basis of a result of calculation analysis by the calculation processing means.

  According to a second aspect of the present invention, in the first aspect of the invention, the displacement amount detecting means includes an optical linear scale.

  According to a third aspect of the present invention, in the first aspect of the invention, the displacement amount detecting means includes a magnetic linear scale.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the arithmetic processing means is configured to cause the peak of the unit displacement amount in the rebound region after the unit displacement amount of the head portion becomes zero. And the head portion is in contact with the workpiece when the count value reaches a specified number.

  According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the arithmetic processing means is configured such that the amplitude of the unit displacement amount in the rebound region after the unit displacement amount of the head portion becomes zero. A value is calculated, and it is determined that the head portion is in contact with the workpiece when the amplitude value is equal to or less than a specified amplitude value.

  The invention according to claim 6 is the invention according to any one of claims 1 to 5, wherein the processing machine is an ultrasonic fusion bonding machine, and the processing machine control means is configured to perform an operation analysis result of the operation processing means. Based on this, the ultrasonic oscillation start timing of the ultrasonic fusion bonding machine is controlled.

  The invention according to claim 7 is a control method of a processing machine for processing a workpiece by bringing the head portion into contact with the workpiece, the detection output of a displacement amount detecting means for detecting the displacement amount of the head portion with respect to the workpiece. A monitoring step of monitoring a displacement amount of the head portion relative to the workpiece, and a step of calculating a unit displacement amount of the head portion per unit time from a displacement amount of the head portion relative to the workpiece monitored in the monitoring step; And an analysis step for analyzing a contact state of the head portion with respect to the workpiece from the unit displacement, and a control step for controlling the processing machine based on an analysis result of the analysis step.

  According to the present invention, there is provided a control device for a processing machine for processing a workpiece by bringing the head portion into contact with the workpiece, the displacement amount detecting means for detecting the displacement amount of the head portion with respect to the workpiece, and the displacement amount. An arithmetic processing unit that calculates a unit displacement amount of the head unit per unit time from the displacement amount detected by the detection unit, and analyzes a contact state of the head unit with respect to the workpiece from the calculated unit displacement amount; and And a processing machine control means for controlling the processing machine based on the calculation analysis result by the arithmetic processing means, so that the contact state of the head portion with respect to the workpiece can be detected with high accuracy, and the processing machine can be optimally controlled. There is an effect.

FIG. 1 is a diagram showing an outline of an ultrasonic fusion bonding apparatus according to a first embodiment configured by applying a control device for a processing machine according to the present invention. FIG. 2 is a graph showing an example of the transition of the unit displacement amount of the head portion with respect to the workpiece of the ultrasonic fusion bonding apparatus shown in FIG. FIG. 3 is a flowchart showing a control example of the ultrasonic fusion bonding apparatus shown in FIG. FIG. 4 is a flowchart showing another control example of the ultrasonic fusion bonding apparatus shown in FIG. FIG. 5 is a diagram showing an outline of an ultrasonic fusion bonding apparatus according to a second embodiment configured by applying the control device for a processing machine according to the present invention.

  Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a diagram showing an outline of an ultrasonic fusion bonding apparatus according to a first embodiment configured by applying a control device for a processing machine according to the present invention.

  In FIG. 1, an ultrasonic fusion bonding apparatus 100 according to the first embodiment places a workpiece 3 to be processed on a jig 2 placed on a base 1, and loads the workpiece 3 with a pneumatic cylinder 10. In addition, ultrasonic bonding is applied to the work 3 from the head portion 30 to ultrasonically melt and bond the joining portion of the work 3.

  Here, the head unit 30 is held by a guide 20 attached to the support column 4 planted from the base 1 so as to be movable in the vertical direction. The amount of movement of the head unit 30 with respect to the workpiece 3 is determined by the displacement amount detection means. It is detected by a certain displacement meter 50. The displacement meter 50 can be configured using a linear gauge (optical linear scale) or a magnet scale (magnetic linear scale) having a resolution of 1.0 to 0.001 μm.

  The pneumatic cylinder 10 is attached to the support column 4 via the attachment portion 11, and the workpiece 3 is connected via the connecting component 40 and the head portion 30 under the control of the controller 62 provided in the control portion 60 of the ultrasonic fusion bonding apparatus 100. A load is applied.

  The ultrasonic oscillator 61 provided in the control unit 60 of the ultrasonic fusion bonding apparatus 100 is controlled by the controller 62 to oscillate ultrasonic vibrations to melt the bonded portion of the workpiece 3. Is applied from the head unit 30 to the workpiece 3.

  In the ultrasonic fusion bonding apparatus 100 according to the first embodiment, the movement amount of the head unit 30 with respect to the workpiece 3 detected by the displacement meter 50 is input, and the movement amount of the head unit 30 per unit time is calculated from the movement amount of the head unit 30. An arithmetic processing device 70 is provided that calculates a unit displacement amount and analyzes the contact state of the head unit 30 with respect to the workpiece 3 from the calculated unit displacement amount.

  The arithmetic processing device 70 may be configured to be incorporated in advance in the control unit 60 of the ultrasonic melt bonding apparatus 100, but is configured to be connected to the control unit 60 of the ultrasonic melt bonding apparatus 100 from the outside. May be. In this case, the arithmetic processing device 70 can be configured using, for example, a personal computer (PC), and the control unit 60 is based on the contact state of the head unit 30 with respect to the workpiece 3 that has been arithmetically analyzed by the arithmetic processing device 70. Various control instructions for controlling the ultrasonic fusion bonding apparatus 100 are given to the controller 62.

  In the ultrasonic fusion bonding apparatus 100, when ultrasonic fusion bonding is performed on the joining portion of the workpiece 3, first, the head portion 30 is lowered by the control of the pneumatic cylinder 10 by the controller 62 of the control portion 60, and the tip of the head portion 30 is moved. In the contact state in which the workpiece 3 is brought into contact with the workpiece 3 and a load is applied to the workpiece 3 and a load is applied to the workpiece 3 by the head unit 30, ultrasonic vibration is generated from the ultrasonic oscillator 61, This ultrasonic vibration is applied from the head unit 30 to the joining portion of the workpiece 3.

  Here, the oscillation start timing of the ultrasonic oscillator 61 is preferably performed in a contact state in which the tip of the head unit 30 is optimally in contact with the joining portion of the workpiece 3.

  In the ultrasonic fusion bonding apparatus 100 according to the first embodiment, the movement amount of the head unit 30 relative to the workpiece 3 detected by the displacement meter 50 is monitored by the arithmetic processing unit 70, and the head unit 30 relative to the monitored workpiece 3 is monitored. The unit displacement amount of the head unit per unit time is calculated from the movement amount, the contact state of the head unit 30 with respect to the work 3 is calculated and analyzed from the unit displacement amount of the head unit, and the ultrasonic oscillator is based on the calculation analysis result. 61 starts the oscillation start timing.

  FIG. 2A is a graph schematically showing an example of a transition waveform of the unit displacement amount of the head unit 30 with respect to the workpiece 3 of the ultrasonic melt bonding apparatus 100 shown in FIG. The unit displacement amount of the head unit 30 with respect to the workpiece 3 calculated and analyzed by the apparatus 70 is shown, and the broken line graph is a detection waveform of a pressure sensor conventionally used for detecting contact of the head unit 30 with the workpiece 3.

  In FIG. 2A, when the descent of the head unit 30 is started at time t0, the unit displacement amount [mm / sec] of the head unit 30 is as shown by the solid line graph in FIG. The number of unit displacements of the head unit 30 becomes a constant value. In FIG. 2A, the horizontal axis indicates time [x1 / 100 sec].

  When the head unit 30 comes into contact with the workpiece 3, the unit displacement amount of the head unit 30 decreases rapidly and becomes zero at time t1. Thereafter, a plurality of peaks are formed by rebounding the head portion 30 with respect to the workpiece 3.

  On the other hand, the output [N] of the pressure sensor used conventionally rises rapidly at a time ts later than the time t1.

  As apparent from FIG. 2A, when a conventionally used pressure sensor is used, the detection of the contact of the head unit 30 with the workpiece 3 is at a time ts later than the time t1. This is because the pressure sensor that has been used in the past is located between the arrangement part of the connecting component 40 or the base 1 and the jig 2, so that the head part 30 and the jig can be used even if a high-precision pressure sensor is used. It is thought that the time constant increases due to the dead weight of 2, and the detection time point of contact of the head unit 30 with the workpiece 3 is delayed.

  The unit displacement amount of the workpiece in the rebound region of the head unit 30 with respect to the workpiece 3 shown in FIG. The unit displacement of the head part 30 becomes zero at time t1, and then rebounds are repeated until time t9. At this time, the amplitude of the unit displacement amount of the workpiece in the rebound region is sequentially reduced as indicated by a1 to a4.

  By the way, in the first embodiment, a displacement meter 50 having a resolution of 0.1 μm or less is used, and a calculation analysis device 70 having a calculation analysis time of 0.1 ms or less is used. 3 can be detected with high accuracy.

  According to such a configuration, since the contact state of the head unit 30 with the workpiece 3 can be detected with high accuracy, for example, the oscillation start timing of the ultrasonic oscillator 61 of the ultrasonic melt bonding apparatus 100 can be optimally controlled. become.

  FIG. 3 is a flowchart showing an example of control using the displacement meter 50 and the arithmetic processing unit 70 of the ultrasonic fusion bonding apparatus 100 shown in FIG.

  When this process is started, the arithmetic processing unit 70 gives an instruction to lower the head unit 30 to the controller 62 of the control unit 60 (step 301). Thereby, the head unit 30 starts to descend toward the workpiece 3 placed on the jig 2.

  The arithmetic processing unit 70 monitors the output of the displacement meter 50 (step 302), and calculates the displacement amount of the head unit 30 per unit time from the output of the displacement meter 50 (step 303).

  Then, it is checked whether or not the calculated displacement of the head unit 30 becomes zero when the head unit 30 comes into contact with the work 3 (step 304). If the displacement amount of the head unit 30 is not zero (NO in step 304), the process returns to step 303 to calculate the displacement amount of the head unit 30 per unit time, and the displacement amount of the head unit 30. Wait for it to become zero.

  If it is determined in step 304 that the displacement amount of the head unit 30 has become zero (step 304), the number of peaks of the unit displacement amount of the head unit 30 in the next rebound region is counted (step 305).

  Next, by counting the number of peaks of the unit displacement amount of the head unit 30, it is checked whether or not the counted number of peaks has become a predetermined specified number, for example, “3” (step 306). Here, when the number of peaks of the unit displacement amount of the head unit 30 is not the predetermined prescribed number (NO in step 306), the process returns to step 305 and the number of peaks of the unit displacement amount of the head unit 30 is counted. Continue counting.

  When it is determined in step 306 that the peak count value of the unit displacement amount of the head unit 30 has reached a predetermined specified number (YES in 306), the head unit 30 applies an ultrasonic wave to the workpiece 3. Assuming that the optimum contact state has been reached, an ultrasonic oscillation start instruction is given to the ultrasonic oscillator 61 via the controller 62 of the controller 60 (step 307). Thereby, ultrasonic vibration is applied from the head unit 30 to the workpiece 3, and ultrasonic fusion bonding of the workpiece 3 is started.

  Next, it is checked whether or not the movement amount of the workpiece after the head unit 30 contacts the workpiece 3 has reached the target movement amount of the ultrasonic fusion bonding process (step 308). The determination as to whether or not the head 30 has reached the target movement amount of the ultrasonic melt bonding process is based on the displacement after the head 30 comes into contact with the workpiece 3 by the arithmetic processing unit 70 that monitors the output of the displacement meter 50. This is performed based on the count value of a total of 50 outputs.

  If it is determined in step 308 that the head unit 30 has reached the target movement amount of the ultrasonic fusion bonding process (YES in step 308), after the predetermined cooling period has elapsed, the controller 62 of the control unit 60 performs arithmetic processing. An instruction to raise the head unit 30 is given from the apparatus 70 (step 310), and if it is determined that the head unit 30 has returned to the top dead center (YES in step 311), the ultrasonic melt bonding by the ultrasonic melt bonding apparatus 100 is performed. Finish the processing.

  FIG. 4 is a flowchart showing another control example of the ultrasonic fusion bonding apparatus shown in FIG. In the control example shown in FIG. 3, the number of peaks of the unit displacement amount in the rebound region after the unit displacement amount of the head unit 30 becomes zero is counted, and when the count value reaches a specified number, It is determined that the unit 30 is in contact with the workpiece 3, and an ultrasonic oscillation start instruction is given to the ultrasonic oscillator 61 of the control unit 60. However, in another control example shown in FIG. The amplitude value of the unit displacement amount of the head portion 30 in the rebound region after the unit displacement amount of the head portion 30 becomes zero (see the amplitude values a1 to a4 in FIG. 2B), and this amplitude value is calculated. When the head unit 30 is in an optimal contact state for applying ultrasonic waves to the workpiece 3 when the amplitude becomes equal to or less than the specified amplitude value, ultrasonic waves are transmitted to the ultrasonic oscillator 61 via the controller 62 of the control unit 60. Gives an oscillation start instruction.

  That is, in FIG. 4, when this processing is started, the arithmetic processing unit 70 gives an instruction to lower the head unit 30 to the controller 62 of the control unit 60 (step 401). The descent starts toward the workpiece 3 placed on the jig 2.

  The arithmetic processing unit 70 monitors the output of the displacement meter 50 (step 402), and calculates the amount of displacement of the head unit 30 per unit time from the output of the displacement meter 50 (step 403).

  Then, it is checked whether or not the calculated displacement amount of the head portion 30 has come to zero when the head portion 30 comes into contact with the work 3 (step 404). If the displacement amount of the head portion 30 is not zero, (NO in step 404), the process returns to step 403 to calculate the amount of displacement of the head unit 30 per unit time and wait until the amount of displacement of the head unit 30 becomes zero. If it is determined that the displacement amount has become zero (step 404), the amplitude value of the unit displacement amount of the head unit 30 in the next rebound region is counted (step 405).

  Here, if it is determined that the amplitude value of the unit displacement amount of the head unit 30 has become equal to or smaller than the predetermined specified amplitude value (YES in 406), the ultrasonic wave is transmitted to the ultrasonic oscillator 61 via the controller 62 of the control unit 60. An oscillation start instruction is given (step 407). Thereby, ultrasonic vibration is applied from the head unit 30 to the workpiece 3, and ultrasonic fusion bonding of the workpiece 3 is started.

  When it is determined that the head unit 30 has reached the target movement amount of the ultrasonic fusion bonding process (YES in step 408), after the predetermined cooling period has elapsed, the arithmetic processing unit 70 is connected to the controller 62 of the control unit 60. When the head unit 30 is instructed to ascend (step 410) and it is determined that the head unit 30 has returned to the top dead center (YES in step 411), the ultrasonic melt bonding apparatus 100 performs ultrasonic melt bonding processing. Exit.

  In FIG. 4, the ultrasonic oscillation of the ultrasonic oscillator 61 is started when the amplitude value of the unit displacement amount of the head unit 30 becomes equal to or less than the specified amplitude value. When the number of peaks of the displacement amount reaches a predetermined specified number and the amplitude value of the unit displacement amount of the head unit 30 is less than or equal to the specified amplitude value, or the number of peaks of the unit displacement amount of the head unit 30 is the predetermined specified number. The ultrasonic oscillation of the ultrasonic oscillator 61 may be started when either the number is reached or the amplitude value of the unit displacement amount of the head unit 30 is equal to or less than the specified amplitude value.

  FIG. 5 is a diagram showing an outline of an ultrasonic fusion bonding apparatus 200 of Example 2 configured by applying the control device for a processing machine according to the present invention. In the second embodiment shown in FIG. 5, a speed control hydraulic damper 80 is provided for the head unit 30.

  Other configurations are the same as those of the ultrasonic fusion bonding apparatus 100 of the first embodiment. In FIG. 5, the same reference numerals as those used in FIG. 1 are attached to portions that perform the same functions as those of the ultrasonic fusion bonding apparatus 100 shown in FIG. 1, and detailed descriptions thereof are omitted.

  In the ultrasonic fusion bonding apparatus 200 according to the second embodiment shown in FIG. 5, since the speed control hydraulic damper 80 is provided for the head portion 30, the rebound of the head portion 30 with respect to the workpiece 3 is rapidly attenuated. Accordingly, an ultrasonic oscillation start instruction is given to the ultrasonic oscillator 61 at an optimal timing earlier than that of the ultrasonic melt bonding apparatus 100 of the first embodiment shown in FIG. And speeding up can be achieved.

  In this embodiment, the amount of movement of the head unit 30 relative to the workpiece 3 detected by the displacement meter 50 is monitored, calculated and analyzed by the arithmetic processing unit 70, and the ultrasonic fusion bonding apparatus 200 is set based on the analysis result. Since it is configured to control, there is also an advantage that the speed of the speed control hydraulic damper 80 and the displacement amount of the head unit 30 can be managed in an integrated manner.

  In the second embodiment, the pneumatic cylinder 10 is used in order to apply a load to the workpiece 3. However, instead of the pneumatic cylinder 10, an electric cylinder based on servo control may be used. Can do.

  In the first and second embodiments, the amount of movement of the head unit 30 relative to the workpiece 3 detected by the displacement meter 50 is monitored by the arithmetic processing unit 70, and the amount of movement of the head unit 30 relative to the workpiece 3 is determined per unit time. The unit displacement amount of the head portion is calculated, and the oscillation start timing of the ultrasonic oscillator 61 is controlled based on the unit displacement amount. It is possible to detect idle shots and set mistakes.

  In addition, according to the control device and method for a processing machine of the present invention, since the detection of the contact state of the head unit 30 with respect to the workpiece 3 and the movement control of the head unit 30 are performed using the same arithmetic processing unit 70, Process control can be performed simply and appropriately.

  In addition, the control device and method for a processing machine according to the present invention include devices other than the ultrasonic fusion bonding device, for example, a cylinder type low-medium load type press, a metal press, a cutting machine, a resin welding machine, a metal The same can be applied to a bonding machine or the like.

  The present invention is not limited to the above-described embodiments, and many modifications can be made by the ordinary creation ability of those skilled in the art within the scope of the technical idea of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Base 2 ... Jig 3 ... Work 4 ... Strut 10 ... Pneumatic cylinder 30 ... Head part 40 ... Connection part 50 ... Displacement meter 60 ... Control part 61 ... Ultrasonic oscillator 62 ... Controller 70 ... Arithmetic processing unit 80 ... Speed Hydraulic damper for control 100 ... Ultrasonic fusion bonding apparatus 200 ... Ultrasonic fusion bonding apparatus

Claims (7)

A control device for a processing machine for processing a workpiece by bringing the head portion into contact with the workpiece,
A displacement amount detecting means for detecting a displacement amount of the head portion relative to the workpiece;
An arithmetic processing unit that calculates a unit displacement amount of the head unit per unit time from the displacement amount detected by the displacement amount detection unit, and analyzes a contact state of the head unit with respect to the workpiece from the calculated unit displacement amount. When,
A processing machine control means for controlling the processing machine based on a calculation analysis result by the calculation processing means;
A control apparatus for a processing machine comprising:   2. The processing machine control device according to claim 1, wherein the displacement amount detection means includes an optical linear scale.   The said displacement amount detection means contains a magnetic type linear scale, The control apparatus of the processing machine of Claim 1 characterized by the above-mentioned.   The arithmetic processing means counts the number of peaks of the unit displacement amount in the rebound region after the unit displacement amount of the head portion becomes zero, and when the count value reaches a specified number, the head portion 4. The processing machine control device according to claim 1, wherein it is determined that the workpiece is in contact with the workpiece.   The arithmetic processing means calculates an amplitude value of the unit displacement amount in a rebound region after the unit displacement amount of the head portion becomes zero, and when the amplitude value becomes equal to or less than a specified amplitude value, the head portion 5. The processing machine control device according to claim 1, wherein the control device determines that the workpiece is in contact with the workpiece. 6. The processing machine is an ultrasonic fusion bonding machine,
The said processing machine control means controls the ultrasonic oscillation start timing of the said ultrasonic fusion joining machine based on the calculation analysis result of the said arithmetic processing means, The any one of Claim 1 thru | or 5 characterized by the above-mentioned. Control device for processing machines. A control method of a processing machine for processing a workpiece by bringing a head portion into contact with the workpiece,
A monitoring step of monitoring a displacement amount of the head portion relative to the workpiece based on a detection output of a displacement amount detecting means for detecting a displacement amount of the head portion relative to the workpiece;
Calculating a unit displacement amount of the head unit per unit time from a displacement amount of the head unit with respect to the workpiece monitored in the monitoring step;
An analysis step of analyzing a contact state of the head portion with respect to the workpiece from the unit displacement amount;
A control step of controlling the processing machine based on the analysis result of the analysis step;
A control method for a processing machine, comprising:

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