JPS6222300Y2 - - Google Patents

Description

[Detailed explanation of the idea]

The present invention relates to an operation control device for a profiling gas cutting machine. Conventional tracing gas cutting machines use a tracer that automatically traces the outline of the template, which formed the shape to be cut, and a processing machine that works in one-to-one relation with this tracer, that is, a gas torch. A workpiece such as a steel plate is cut using cutting oxygen from a gas torch while following the shape of the template using a tracer by mechanical contact or photoelectric non-contact, thereby cutting a workpiece having the same shape as the shape of the template. Conventionally, when processing using such a tracing gas cutting machine, first the tracer is manually moved to a position slightly away from the template, the torch is operated here to perform piercing, and then the cutting is performed. Manually move the tracer to the starting point while tracing, then cut while tracing, and when the tracer reaches the end point, stop blowing out the cutting oxygen and release the tracer from the template. There is. Therefore, during the work, it is necessary for a worker to be near the device at all times to control the movement of the tracer as well as the operation of the torch, which is extremely troublesome and inefficient. Particularly when performing tracing machining using multiple templates in succession through a series of operations, once tracing machining using a certain template is completed, it is necessary to move the tracer to the next template, and there is no need to continue the work. It becomes even more troublesome. To eliminate such drawbacks, guide lines are formed on the template to automatically guide the tracer from the piercing point to the tracing start point or from the tracing end point of one template to the piercing point of the next template. A tracing device has been proposed that automatically traces this guide line using a tracer. However, in this case, it is necessary to create a special template on which guiding lines are drawn, and there is a drawback that conventionally used templates cannot be used. Since templates require high precision, great care must be taken in their manufacture, which is very cumbersome and expensive. Furthermore, in actual profiling, the piercing point and profiling start point may not be determined in advance depending on the shape and material of the workpiece, the shape of the template, and the arrangement of multiple templates when using them. In such cases, a pre-created template with guide lines cannot be used, and the worker must manually move the tracer or create a template with new guide lines. must be created, and work efficiency deteriorates. Also, without using a template, the position of the processing machine relative to the workpiece is set numerically in advance, stored as a predetermined program, and then read out to control the movement and operation of the processing machine.So-called numerical control Cutting machines using this method have also been developed, but such numerical control devices have the disadvantage of being complex and expensive. Furthermore, this numerical control method lacks flexibility because the operation is controlled according to a predetermined program. It is not possible to easily change the piercing point, profile starting point, etc., which may be inconvenient in practice. Furthermore, when operating the conventional profiling apparatus, an operator was required not only to move the tracer to a predetermined position but also to control the operation of the processing machine. For example, in a profiling gas cutting machine, after moving the tracer to the piercing point, operate the operation panel to operate the gas torch to generate cutting oxygen, and when the tracer reaches the end point of the profiling, stop blowing out the cutting oxygen. It was necessary to manually move the tracer to the next piercing point and then blow out cutting oxygen again.
Such operations are also troublesome and lead to a decrease in work efficiency. In the numerical control method, such operating commands for the processing machine are also stored in advance, and the processing machine can be operated automatically based on these operating commands during processing. However, as mentioned above, numerical control devices are complicated and expensive, and have the drawbacks of poor flexibility. The purpose of the present invention is to eliminate the above-mentioned drawbacks, allow the use of conventionally used ordinary templates, eliminate the need for workers to manually move the tracer during processing, and, moreover, compared to numerical control methods. It is easy to configure and can be carried out at low cost, and it is extremely easy to set the piercing point and tracing starting point so that optimal machining can be performed depending on the shape and material of the workpiece, the shape and arrangement of the tracing pattern, etc. It is an object of the present invention to provide an operation control device for a gas cutting machine that can automatically control the operation of the gas cutting machine corresponding to each operating point. In order to achieve this purpose, the present invention
A tracer that detects a pattern to be traced, a tracer pattern control unit that outputs a position control signal for the tracer in response to a signal detected by the tracer, and a pattern to be patterned by the tracer in response to a position control signal from the tracer pattern control unit. a tracer drive unit that automatically traces the tracer along the contour of the tracer; a gas torch that interlocks with the tracer in a predetermined constant relationship; and a torch drive control unit that controls the operation of the gas torch. In a device for controlling the operation of a gas cutting machine that automatically traces the contour of a patterned figure while using a gas torch to cut a workpiece in the same shape as the patterned pattern, the tracer is applied to the patterned pattern prior to machining. an operating point input section that inputs operating points such as a piercing point, a profiling start point, and an end point while manually moving the tracer; a position reading section that automatically detects the coordinate position of the tracer at these operating points; an operation command input section for inputting operation command information representing a predetermined operation to be performed by the gas torch at the operating point; and a tracer for storing the coordinate position and operation command information at the operating point, and for moving the tracer between these operating points. a storage unit that stores operation command information for commanding the operation of the gas torch during machining in relation to the coordinate position; and a storage unit that reads out the coordinate position and related operation command information stored in the storage unit during processing to automatically move the tracer. a position setting unit that outputs a position control signal to control the operation of the gas torch and a torch drive control signal to control the operation of the gas torch; and a position setting unit that outputs a position control signal to control the operation of the gas torch; a switching section that supplies a control signal to the tracer drive section, is switched to a tracing mode when the tracer is tracing a patterned figure, and supplies a signal from the tracer tracing control section to the tracer drive section as a position control signal; The position reading section, the storage section, the position setting section, and the switching section are controlled to automatically control the movement of the tracer and the gas torch according to the preset operating point and overlapping pattern, and to control the operation of the gas torch according to the preset operating point and overlapping pattern. The present invention is characterized in that it includes a control section that automatically controls according to a torch drive control signal to automatically perform pattern processing according to a desired pattern pattern. The present invention will be described in detail below with reference to the drawings. FIG. 1 is a plan view showing the structure of an example of the main body mechanism of a profiling gas cutting machine whose operation is to be controlled by the control device of the present invention. The entire device is placed on a pair of rails 1a and 1b, and the direction of these rails is the Y direction. Rollers provided on the main frame 2a and subframe 2b are connected to the rails 1a, 1
b Let it slide on the surface. A garter 3 is fixed between these frames, and the direction of this garter is the X direction. A main moving table 4a and a sub-moving table 4b are provided along the gutter 3, and a movable connecting lever 5 is connected to these moving tables. A photoelectric tracer 6 is attached to the right end of the connecting lever 5, and a plurality of gas torches 7a, 7b, 7c are fixed to the left side. The detection optical axis of the tracer 6 and the gas torch are aligned in the X direction. A Y-axis motor 8 for driving the tracing device in the Y-direction is attached to the main frame 2a, and a Y-axis position detector 9 for detecting the position of the tracer 6 in the Y-axis direction is attached. In addition, the main moving table 4a has an X
An X-axis position detector 1 is provided with a shaft motor 10 and is used to detect the position of the tracer 6 in the X-axis direction.
1 will be provided. In this example, these Y-axis and Y-axis position detectors 9 and 11 are constructed of rotary encoders, but it goes without saying that any other position detectors may be used. Further, the tracer 6 is provided with a tracing direction detector for detecting the tracing direction, and the tracer 6 is also provided with a tracing direction detector for detecting the tracing direction.
A light spot projection device is provided to display the position traced by the spot. Therefore, the user uses the drawing table 1
The trace position of the template placed on the template 2 relative to the figure can be determined by the light spot. In the control device of the present invention, FIG. 2 shows the structure of an example of a control panel for storing in advance the coordinate positions of operating points such as a piercing point, a profiling start point, and a profiling end point. This operation panel 20 can be provided at an appropriate position on the main frame 2a or at a location remote from the apparatus. Operation panel 20 in this example
In addition to being equipped with a piercing point setting switch 21, a profiling start point setting switch 22, a clear switch 23, a start switch 24, and a stop switch 25, it also includes a manual timer 26 for setting the preheating time, a timer extension switch 27, and a timer release switch 28. It is growing. The functions of these switches will be explained in detail later. FIG. 3 is a block diagram showing an example of the configuration of an electric circuit section of the control device of the present invention. In addition to the Y-axis motor 8, Y-axis position detector 9, X-axis motor 10, and X-axis position detector 11 described above, a tracing direction drive motor, that is, a steering motor 13 provided in the tracer 6, and a steering motor 13 for detecting the steering direction. An angle detector 14 is provided. An output signal from the operation panel 20 is supplied to a control section 30 to control each section. The output signals from each detector 9, 11, 14 are supplied to the position reading section 31, and the Y of the tracer 6 is
Along with reading the position information in the direction and the X direction, the angle information indicating the tracing direction of the tracer 6 is also read. This position information at a predetermined position is stored in a predetermined storage position of the storage unit 32 under the control of the control unit 30 . When performing actual processing, the control unit 3
0, the information stored in the storage unit 32 is read out to the position setting unit 33, where necessary processing is performed to control the position control signal representing information regarding the path that the tracer 6 should follow and the operation of the gas torch. Create a torch drive control signal. The switching unit 3 is controlled to switch this position control signal by the control unit 30.
4 to servo amplifiers 35, 36, and 37 to generate drive signals for the respective motors 8, 10, and 13 to move the tracer 6 along a predetermined path. On the other hand, when the tracer 6 is tracing the template figure, the signal from the tracer 6 is supplied to the tracing control section 38,
The output position control signal is supplied to the servo amplifiers 35, 36, and 37 via the switching section 34. Next, the sequential operations of the above-mentioned control device of the present invention and the operations of the various parts related thereto will be explained by taking as an example the case where pattern processing is performed according to a diagram as shown in FIG. In the present invention, prior to actual machining, the coordinate positions of operating points such as the piercing point, tracing start point, and tracing end point are stored in advance while moving the tracer 6 relative to the figure to be patterned.
In FIG. 4, point 0 is the origin, and the tracer 6 is first set at this position, and the Y-direction and X-direction reversible counters provided in the position reading section 31 are each set to zero. Next, manually set the tracer 6 to the first
to the position of piercing point P ₀ , and this first
The position reading unit 31 detects the X, Y coordinate position information of the piercing point P ₀ . At this time, press the piercing point setting switch 21 on the operation panel 20 and press the position reading section 3.
The X, Y coordinate position of 1 is stored in a predetermined address position of the storage unit 32. In the present invention, this piercing point P ₀ can be set at any position depending on the shape and quality of the material to be processed. Next, move the tracer 6 to the tracing start point of the first figure A, that is, the incident point _P1 , press the tracing start point setting switch 22 on the operation panel 20, and store the X, Y coordinate position of this point _P1 in the storage section 32. to be memorized. At the same time, a steering handle provided on the tracer 6 is operated to designate the direction of tracing. At this time, the output of the angle detector 14 is read by the position reading section 31, and the angle information is also stored in the storage section 32. In this example, figure A is traced clockwise. Next, place tracer 6 at the piercing point for figure B.
_P2 , press the piercing point setting switch 21 at this position, read the X, Y coordinate position of this second piercing point _P2 with the position reading section 31, and store this in the storage section 32. Further, the tracer 6 is moved to the tracing starting point _P3 for the figure B, and the coordinate position of this second tracing starting point _P3 is stored, as well as the tracing direction. In this example, figure B is also assumed to follow the clockwise rotation. In this way, the X and Y coordinate positions of each operating point are sequentially stored in the storage section 32, and the tracing directions at the tracing start points _P1 and _P3 are also stored. In this example, shapes A and B are closed, and the tracing goes around these shapes, so there is no need to specially set the tracing end point, and it is possible to start from the tracing starting point and return to this point again. The end of the tracing operation is detected by detecting this. A clear switch 23 provided on the operation panel 20 is used to clear the last stored contents by operating the clear switch 23 if a mistake is made when storing the coordinate position in the storage section 32. With the above steps, the preparation stage is completed, and then the actual processing is performed. In order to fuse the workpiece with the torches 7a to 7c, it is necessary to preheat the workpiece at the piercing point, but since the preheating time varies depending on the thickness of the workpiece, the strength of the preheating flame, etc., this applies to all cases. It is generally difficult to determine one appropriate value. In this example, a preheating timer 26 is provided on the operation panel 20 so that the operator can set the preheating time each time. This preheating timer 26 is at the piercing point.
Although the preheating time is designed to operate at P ₀ and P ₂ , the preheating time can be extended by pressing an extension switch 27 and shortened by pressing a release switch 28 . First, when the tracer 6 is set at the origin 0 position and the start switch 24 is pressed, the coordinate position of the first piercing point P ₀ previously stored in the storage section 32 is read out to the position setting section 33. Since the switching unit 34 is switched to the set position mode, the tracer 6 automatically moves toward this first piercing point _P0 , for example, at 3000.
Move at a high speed of mm/min. For this purpose, the position of the tracer 6 is constantly detected by the position reading section 31.
When the tracer 6 reaches the first piercing point _P1 , it pauses there and starts the preheating timer 26 of the operation panel 20 by the torch drive control signal from the position setting unit 33, and generates a preheating flame from the torches 7a to 7c. Start. Immediately before the end of the preset preheating time, cutting oxygen is ejected to pierce the workpiece.
perforate. When the control unit 30 detects the elapse of the preheating time, the coordinate position of the first tracing start point _P1 is stored in the storage unit 3.
2 to the position setting section 33, and while cutting, the preset cutting speed (50 to 1250 mm/min)
The tracer 6 is automatically moved to the contour starting point _P1 . During this time, steering angle information related to this tracing start point _P1 is read out, and the motor 13
energize to set the orientation of the tracer in a predetermined direction. When detecting that the tracer 6 has reached the tracing start point _P1 , the control section 30 gives a command to the switching section 34 to switch to the tracing mode. Therefore, from now on, the tracer 6 is moved along the pattern A by the tracing control section 38, and the work piece is cut in accordance with the pattern A. When the tracer 6 traces the pattern A clockwise once and reaches the tracing starting point _P1 again, the injection of cutting oxygen is stopped. When detecting that _the tracer 6 has returned to the tracing starting point _P1 , the cutting width,
An error window of a predetermined size is set with the point _P1 as the center, taking into consideration the accuracy of each part. Generally, the size of this error window can be a square with a side length of 0.5 to 1.5 mm.
When the detection point of the tracer 6 falls within the error window set in this way, it can be considered that the tracer 6 has returned to point _P1 . At this time, as described above, the blowout of cutting oxygen is stopped and the switching part 3
4 to set position mode again. Next, under the control of the control unit 30, the tracer 6
The coordinate position of the point to be moved is read out from the storage unit 32 to the position setting unit 33. In this example, the coordinate position of piercing point _P2 with respect to figure B is read out. The position setting unit 33 determines that this point P ₂ is the piercing point, and generates a signal to move the tracer 6 to this point P ₂ at a fast forward speed. When it is detected that the tracer 6 has reached the piercing point _P2 , the preheating timer 26 is started again in the same manner as the operation at the first piercing point _P0 described above.
Preheating flame is injected from the torches 7a to 7c for a predetermined period of time, and just before the end of this period, cutting oxygen is injected again to perform piercing. When the time set by the preheating timer 26 is completed,
The coordinate position of the tracing start point _P3 with respect to figure B is read from the storage unit 32 to the position setting unit 33, and the tracer 6
is moved toward this tracing starting point _P3 at cutting speed. When detecting that the tracer 6 reaches the tracing start point _P3 , the control section 30 switches the switching section 34 to set the tracing control mode. From then on, the profile control section 38
The tracer 6 is driven by a signal from the tracer 6, and can carry out tracing cutting along the figure B. When the tracer 6 returns to the tracing starting point _P3 , the cutting oxygen is stopped. As mentioned above, according to the present invention, the operator only needs to press the start switch 24 during processing.
The tracer 6 automatically advances along a preset path and can perform pattern processing along the figure. Therefore, the work efficiency is significantly improved, and since the conventional graphics or templates can be used as they are, the process can be carried out at low cost. Furthermore, since the operating points such as the piercing point and the tracing start point can be arbitrarily set on site, the techniques of skilled workers can be employed, thereby allowing more accurate and efficient tracing processing. Further, the coordinate positions of these operating points and the operation command information to be performed by the processing machine at each operating point can also be stored very easily. FIG. 5 shows another example of the path that the tracer 6 should follow when patterning is performed along a plurality of figures. In this example, two triangles C, D, 1
It has circles E and one square F. The profile cutting is performed from the center, but first the first piercing point _P1 for the figure C is memorized. Next, the tracing start point P ₂ for figure C, the tracing start point P ₃ for figure D, the tracing start point for figure E
Memorize P ₄ sequentially. Next, the second piercing point _P5 for the figure F and the tracing start point _P6 for this figure F are stored. In actual machining, the tracer 6 is fed at high speed from the origin to the first piercing point _P1 . At this point, the preheating timer 26 is activated to perform piercing, and then the tracer 6 is fed at cutting speed toward the profiling start point _P2 . Moving. When detecting that this point _P2 has been reached, the control section 30 switches the switching section 34 to the tracing mode. Therefore, the tracer 6 goes around the figure C clockwise and reaches the tracing start point _P2 again. When it is detected that the tracer 6 has reached this point _P2 , the switching section 34 is switched back to the set position mode. At the same time, the coordinate position of the point P ₃ to which the tracer 6 should go next is read out from the storage section 32 to the position setting section 33 . The position setting unit 33 determines that this point _P3 is the tracing start point. In this case, the tracer 6 is moved toward the starting point _P3 without stopping the cutting oxygen. When the tracer 6 reaches the tracing start point _P3 , it enters the tracing mode again, and tracing processing along the figure D is performed. When the point _P3 is reached again after one round, the control mode is switched again, and the tracer 6 moves at the cutting speed toward the next tracing start point _P4 . When the tracer 6 reaches this tracing start point _P4 , it switches to the tracing mode again, tracing machining along the figure E is performed, and the tracer 6 returns to the tracing starting point _P4 again.
The switching unit 34 is switched to the set position mode. At the same time, the coordinate position of the next point to which the tracer should go is read out to the position setting section 33. The position setting unit 33 detects that this point _P5 is stored as a piercing point. The injection of cutting oxygen is therefore temporarily interrupted and the tracer 6 is moved at high speed towards this piercing point _P5 . tracer 6
Once this point P ₅ is detected, piercing is carried out and the workpiece is drilled. After the preheating time has elapsed, the tracer 6 is moved at a cutting speed toward the tracing start point _P6 of the next figure F. Tracer 6 is this point
When _P6 is reached, the mode switches again to the tracing mode, and tracing machining along the figure F is performed. As described above, according to the present invention, it is possible to move from one figure to the next while cutting continuously, or to move at high speed without cutting, and this control is performed by the position setting section 33. Then tracer 6
It is possible to detect and automatically determine whether the point to which the needle should go is the piercing point or the tracing start point. Therefore, there is no need to memorize cutting oxygen intermittent commands or tracer feed rate commands in the preparation stage, and there is no need for the operator to perform any operations during actual processing. FIG. 6 shows another example of the operation panel 40 used in the control device of the present invention, which includes a clear switch 41,
The piercing point setting switch 42, profiling start point setting switch 43, start switch 44, stop switch 45, preheating time extension switch 46, and release switch 47 are the same as the corresponding switches on the operation panel 20 shown in FIG. . In this example, a numerical value setting button 48 having a numeric keypad and a clear button is provided in order to set the preheating time digitally instead of using a dial. After pressing the preheating time setting switch 49, press this value setting button 48.
Any preheating time between 0 and 99 seconds can be set by operating . The set preheating time can be displayed on the preheating time display section 50. In addition to the functions described with reference to FIGS. 4 and 5, this example has a function of repeatedly performing tracing machining along the same figure as shown in FIG. Figure stand 1 on which the template is placed for this purpose
2 (see FIG. 1) is movable in the Y direction. Now, if we are going to repeatedly perform tracing machining along the two figures G and H shown in Fig. 7, first, prior to machining, we memorize the piercing point P ₁ and tracing start point P ₂ for the figure G in the same way as described above. At the same time, the piercing point P ₃ and the tracing start point P ₄ for the figure H
Remember. When performing repeated machining, it is necessary to return the tracer 6 to the initial point after the profile machining, so the path of the tracer 6 during the first machining is as follows.

[Table] After completing the first profiling process in this way, move the figures G and H by a distance P in the Y direction, and perform the second profiling process on the moved figures G' and H' in the same way. Let's do it. At this time, it is necessary to displace the tracer 6 in the Y direction by P, but this distance P can be input using the operation panel 40 shown in FIG. That is, by pressing the movement amount setting switch 51 on the operation panel 40 and operating the numerical value setting button 48, the necessary movement amount P can be given. This movement amount P is displayed on the movement amount display section 52. Corresponding to the displacement of the tracer 6, the Y-direction coordinate position of each operating point is displaced by the set movement amount P during the second tracing process, resulting in the operating point P ₁ ' shown in FIG. 〜P ₄ ′, tracing processing is performed on the figures G′ and H′. The number of repetitions can also be set using the operation panel 40. For this purpose, the number of repetitions setting switch 53 is pressed and the number setting button 48 is operated to input the number of repetitions. This number of repetitions is displayed on the display section 54. Following this, tracing can be performed while moving the figure table 12 and the tracer 6 by the amount of movement P a set number of times. With this configuration, the shapes G,
Since it is only necessary to store the coordinate position of each point once for H, there is an advantage that the preparation operation is simplified and the storage capacity of the storage unit 32 is also small. In the above-described embodiments of the control device of the present invention, the path to be followed by the tracer 6 is set before machining, and the tracer 6 is automatically moved based on this during machining. Some additional functions can be added. FIG. 8 shows the configuration of an example of an operation panel 60 with such functions added, and the same parts as shown in FIG. 6 are denoted by the same reference numerals. In this example, a relay point setting switch 61, a tracing end point setting switch 62, a continuous cutting switch 63, a slowdown point setting switch 64, a stage change switch 65
will be established. These functions will be explained below. First, the relay point setting switch 61 can be used to set the path that the tracer 6 should follow when cutting is performed continuously from one template to the next without interrupting the injection of cutting oxygen. For example, a case will be explained in which two figures I and J shown in FIG. 9 are successively cut. Let the piercing point and tracing start point for figure I be _P1 and _P2 , respectively, and the tracing start point for figure J be _P4 . Now, after the profiling process for figure I is completed, if the tracer 6 is moved as shown by the broken line toward the profiling start point P ₄ of figure J while the cutting oxygen is still being emitted, the torch will cut out the figure I by profiling process. Therefore, the torch cannot be moved in this way. In such a case, the relay point _P3 is set, and the coordinate position of this relay point _P3 is stored in advance by operating the relay point setting switch 61. By doing this, after the tracing machining for the figure I is completed, the tracer 6 can be moved to the point P ₂ without stopping the injection of cutting oxygen.
Even if the workpiece is moved from the point _P3 to the starting point _P4 for tracing the next figure J, the workpiece produced by the contouring process for the figure I will not be damaged. In this case, since the relay point _P3 is not a piercing point for the figure J, it is necessary to store them separately, and for this purpose, a relay point setting switch 61 is provided. By making this distinction,
When moving from one shape to the next, if there is a piercing point, the cutting oxygen is turned OFF, and if there is no piercing point, the cutting oxygen is kept ON while moving between shapes. This can be done automatically by simply setting the coordinate position of the operating point. The tracing end point setting switch 62 is operated when setting the coordinate position of the tracing end point. For example, if cutting cannot be done in one stroke, it is necessary to temporarily stop the tracing operation at a predetermined point on the tracing figure and start the tracing operation again from another position. If you press the tracing end point setting switch 62 during the preparation stage and memorize the coordinate position of a predetermined point on the figure as the tracing end point, during actual machining, when this point is reached during tracing machining, the tracing operation will start. is canceled, and the switching unit 34 is switched to the set position mode. If a piercing point is set between this profiling end point and the next profiling start point, the injection of cutting oxygen is stopped at the profiling end point, and the tracer 6
to the next set operating point (not necessarily the piercing point). If no piercing point has been set before the next profiling start point, the cutting point will move to the next set operating point at the cutting speed while cutting oxygen is being injected. In the repetitive tracing process explained with reference to FIG. 7, the injection of cutting oxygen was stopped when moving the figure table 12 and tracer 6 to the next position, but depending on the figure to be traced, this movement may be stopped. In some cases, it may be more efficient to not stop the injection of cutting oxygen in between. For this purpose, the operation panel 60 shown in FIG. 8 is provided with a continuous cut switch 63. When this switch 63 is pressed, the cutting oxygen is not stopped even after the profiling process is completed at a certain position, and the cutting oxygen continues to move to the next position. If there is a sharp corner in the profiled figure, or if deceleration is required at the corner during high-speed operation such as plasma cutting, it is necessary to decelerate the cutting speed just before the corner. A slowdown point setting switch 64 is provided to preset this deceleration point. In the preparation stage, the tracer is positioned in front of a corner on the tracing diagram at which deceleration is to be performed, and the deceleration start point is memorized by operating the slowdown point setting switch 64. During actual machining, when the tracer detects that this point has been reached, the cutting speed is reduced at a predetermined rate. After reaching a predetermined deceleration, the cutting speed is accelerated again at a predetermined rate to return to the original normal cutting speed. In this way, cutting speed can be automatically reduced at sharp corners and machining accuracy can be increased. In the above example, only the deceleration start point immediately before the corner is set, but it is also possible to set the acceleration start point. As described above with reference to FIG. 7, there are cases where repeated machining is performed using the same tracing figure, but in the example shown in FIG. 7, the movement pitch of the figure is always the same. However, there are cases where machining is repeatedly performed on the same contour figure at various positions on the workpiece. In such a case, it is necessary to move the figure stand 12 to a predetermined position and change the cutting stage. In such a case, when the drawing table 12 and therefore the tracer 6 move, the coordinate position of the tracer changes, making it impossible to control the operation using the previously stored position information as is. For this purpose, it is only necessary to change the origin position, so a stage change switch 65 is provided on the operation panel 60. When the switch 65 is pressed, the position detecting section 31 does not detect the position of the tracer 6. In this way, the origin of the tracer coordinates can be moved to an arbitrary position. The present invention is not limited to the above-mentioned example, but can be modified and modified in many ways. For example, in the above-described tracing apparatus, the tracer and the processing machine, ie, the gas torch, are linked in a one-to-one relationship, but other relationships may also be used. The advantages of the above-mentioned control device of the present invention are summarized as follows. (1) There is no need to draw a guide line from the piercing point to the tracing start point, and a normal template can be used, so it can be carried out at low cost. (2) After memorizing the operating point and related operating command information, the worker only needs to press the start switch, and there is no need to be near the device at all times, making the work easier and significantly improving work efficiency. do. (3) Compared to the numerical control method, the configuration is very simple and can be implemented at low cost. (4) Setting operating points such as piercing points and profiling start points, as well as setting operation command information related to operating points, can be easily done at the processing site, and the skills of skilled workers can be fully utilized at this time. be able to. (5) By determining the type of operating point, it is possible to have a function to determine movement speed, processing machine operation commands, etc., further improving work efficiency. (6) The coordinate position of each operating point and the operation command information of the processing machine at each operating point can be stored extremely easily, and human errors during storage are reduced.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing the configuration of an example of a mechanical part of a profiling gas cutting machine to which the operation control device of the present invention is applied; FIG. 2 is a plan view showing the configuration of an example of the operation panel;
FIG. 3 is a block diagram showing an example of the configuration of an electric circuit portion implementing the operation control device of the present invention, and FIGS. 4 and 5 are trace diagrams for explaining the operation of the operation control device of the present invention. 6 is a plan view showing the configuration of another example of the operation panel according to the present invention, and FIG. 7 is a plan view for explaining the operation when repeatedly machining the same drawing in the operation control device according to the present invention. FIG. 8 is a plan view showing a tracing figure; FIG. 8 is a plan view showing still another example of the operation panel according to the present invention; FIG.
The figure is a plan view showing a patterned figure for explaining the operation of the control device of the present invention. 1a, 1b...Rail, 2a, 2b...Frame, 3...Girder, 4a, 4b...Moving platform, 5...
...Moving table connection lever, 6...Tracer, 7a-7
c... Gas torch, 8... Y-axis drive motor, 9...
...Y-axis position detector, 10...X-axis drive motor, 1
1...X-axis position detector, 12...Drawing table, A~J
... Tracing figure, P ₀ to P ₆ ... Operating point, 20,4
0,60...Operation panel.

Claims (1)

[Claims for Utility Model Registration] A tracer that detects a patterned figure, a tracer tracing control section that outputs a position control signal of the tracer according to a signal detected by the tracer, and a position control signal from the tracer tracing control section. a tracer drive unit that automatically traces the tracer along the contour of the pattern it traces, a gas torch that interlocks with the tracer in a predetermined constant relationship, and a torch drive that controls the operation of the gas torch. A device for controlling the operation of a gas cutting machine that cuts a workpiece in the same shape as the patterned pattern using a gas torch while automatically tracing the contour of the patterned pattern using the tracer, an operating point input section for inputting operation points such as a piercing point, a tracing start point, and an end point while manually moving the tracer with respect to the tracing figure; a position reading section for detecting; a motion command input section for inputting motion command information representing a predetermined motion that the gas torch should perform at these operating points; and a motion command input section for storing coordinate positions and motion command information at the operating points; a storage unit that stores operation command information for instructing the operation of the gas torch while the tracer moves between operation points in association with coordinate positions; and a storage unit that stores the coordinate positions and related operation command information stored in the storage unit during processing. A position setting section that reads and outputs a position control signal that automatically controls the movement of the tracer and a torch drive control signal that controls the operation of the gas torch, and a position setting section that outputs a position control signal that automatically controls the movement of the tracer and a torch drive control signal that controls the operation of the gas torch. , supplies a position control signal from the position setting section to the tracer drive section, and when the tracer is tracing a patterned figure, is switched to the tracing mode, and sends a signal from the tracer tracing control section to the tracer drive section for position control. A switching unit that supplies signals as a signal, and controls the position reading unit, storage unit, position setting unit, and switching unit, and automatically moves the tracer and gas torch according to the preset operating point and overlapping figure. and a control section that automatically controls the operation of the gas torch in accordance with the torch drive control signal to automatically carry out profiling according to a desired profiling pattern. operation control device.