JP2013232141A - Defective machining prevention system and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent defective machining of waviness occurring in the case of rotating a pipe or the like for machining with a machining machine.SOLUTION: This invention provides a defective machining prevention system 2A for control of a machining machine 4 that rotates a material W for machining. The defective machining prevention system 2A includes code generation means that generates a code for causing a machine to be on standby for a set time period in NC data, and the code generation means generates the code at a place of timing after rotation of the material when swings occur in the material W.

Description

  The present invention relates to a machining failure prevention system and method, and more particularly, to a machining failure prevention system and method for preventing wavy machining failure that occurs when a pipe or the like is rotated and machined by a processing machine.

  Refer to FIG. This is a top view of the processing machine. The material (raw material) W is fixed by the apparatus M2 provided in the processing machine, and in some cases, the material (raw material) W is gripped by the apparatus M1, and a laser is emitted from the laser head L while rotating the A axis of the machine. Irradiate and perform laser cutting. FIG. 20 is a view from the front of this processing machine.

  Refer to FIG. This is a top view of the processing machine. It shows that the material (raw material) W is shaking after the rotation. FIG. 22 shows the processing machine as viewed from the front.

Japanese Patent Laid-Open No. 2004-167777

  Depending on the material (square pipe, channel steel, angle steel, etc.), the hardness and length of the material, there is a phenomenon that the material shakes after the A-axis rotation. And when it cut | disconnects in the state which shakes, there exists a problem that a cut surface will wave and it will not become a product. Refer to FIG. The cut surface is wavy due to shaking during processing of the material (raw material) W.

The present invention is for solving the above-mentioned problem, and the invention according to claim 1 is a processing failure prevention system related to control of a processing machine that performs processing by rotating a material.
It has code generation means to generate code that waits for the machine for a set time in NC data,
The code generation means generates the code at a timing position after the rotation of the material at which the material shakes.

  According to a second aspect of the present invention, the code generating means is a timing after the rotation of the A axis when the material coincides with the registered material shape and material cross-sectional dimensions, and in the XY plane mode. The code is output to the NC data before the path to be machined, and the machining is restarted after the shaking is stopped, thereby preventing the machining surface from being wavy.

  The invention according to claim 3 is characterized in that the registered material shape is a square pipe, a long-angle pipe, an angle steel, an unequal angle iron, or a groove steel.

The invention according to claim 4 is a machining failure prevention method according to control of a processing machine that performs processing by rotating a material.
The code generation means generates a code for waiting for the machine for a set time in the NC data,
The code generation means generates the code at a timing position after the rotation of the material at which the material shakes.

  Conditions are provided for selecting materials that allow the machine (processing machine) to wait for a certain period of time. And the code which makes a machine wait for a fixed time is output to NC data. When this code is output, the shaking is reduced, and the effect is that the waviness of the processed surface can be prevented. See FIG. Further, since the cord is used instead of the stop, the operator has the effect of not having to manually restart.

It is explanatory drawing which shows the outline of a processing system. It is a schematic block diagram of a processing defect prevention system. It is explanatory drawing explaining the kind of material. It is explanatory drawing explaining the screen which sets a material. It is explanatory drawing explaining the set material. It is explanatory drawing explaining the model of material. It is explanatory drawing explaining the dwell in NC data. It is explanatory drawing explaining the relationship between a process locus and a dwell output. It is explanatory drawing explaining the relationship between a process locus and a dwell output. It is explanatory drawing explaining the model of material. It is explanatory drawing explaining the dwell in NC data. It is explanatory drawing explaining the relationship between a process locus and a dwell output. It is explanatory drawing explaining the relationship between a process locus and a dwell output. It is a flowchart explaining operation | movement of a processing defect prevention system. It is a flowchart explaining operation | movement of a processing defect prevention system. It is a flowchart explaining operation | movement of a processing defect prevention system. It is a flowchart explaining operation | movement of a processing defect prevention system. It is a flowchart explaining operation | movement of a processing defect prevention system. It is a prior art explaining a prior art. It is a prior art explaining a prior art. It is a prior art explaining a prior art. It is a prior art explaining a prior art. It is a prior art explaining a prior art. It is a cut surface which shows the state after the cutting | disconnection by this invention.

  FIG. 1 is an explanatory diagram showing an outline of a processing system 1 embodying the present invention.

  The processing system 1 includes an automatic programming device 2, an NC device 3, and a processing machine 4. Since the basic functions of these automatic programming device 2, NC device 3, and processing machine 4 are already known, an outline will be described.

  The automatic programming device 2 creates NC data (NC program). Furthermore, it has a processing failure prevention part (processing failure prevention system) 2A. The NC device 3 receives NC data and controls the processing machine 4.

  The processing machine 4 fixes the material (material) W by the device 5 under the control of the execution unit 4A (see FIG. 2), and in some cases, grips the material (material) W by the device 6 to While rotating, a laser is irradiated from the laser processing head 7 to perform laser cutting on the XY plane of the material along the processing locus.

  In this example, when the paper surface of FIG. 1 is viewed from above, the left-right direction is the X-axis direction, the front-rear direction is the Y-axis, and the up-down direction is the Z-axis direction. The area mode defined by XY is called the XY plane mode. A rotation axis parallel to the X axis is defined as the A axis.

  FIG. 2 is a block diagram showing a schematic configuration of the automatic programming device 2. The automatic programming device 2 is composed of a computer and has a CPU to which a ROM and a RAM are connected. An input device such as a keyboard and a display device such as a display are further connected to the CPU.

The automatic programming device 2 includes a processing failure prevention unit (processing failure prevention system) 2A that executes a function for preventing processing failures as described above. Then, the machining failure prevention unit (machining failure prevention system) 2A cooperates with the function 2A ₁ for creating the machine control code (NC data), and the condition 1 for selecting the target (material W) for waiting the machine for a certain time. has a (material shape) and condition 2 (material cross-sectional dimension), condition 3 of the waiting time (waiting time in seconds) functions 2A ₂ be provided.

Furthermore, the processing failure prevention unit (processing failure prevention system) 2A is defined according to the material (material) W in advance when the automatic programming device 2 becomes a target for preventing waviness of the cut surface when creating NC data. A function 2A ₃ for outputting a code (hereinafter, sometimes referred to as “dwell” in this example) that causes the machine to wait for a certain period of time is provided at a place where the vibration occurs.

On the other hand, the processing machine 4 has an execution unit 4A, and a code that waits for a certain period of time is output while the material (raw material) W after the A-axis rotation is shaking, and the machine performs a certain period of waiting has a function 4A ₁ to, to wait for the machine fixed time, where shaking had subsided, it has a function 4A ₂ to perform restart processing. The portion where the vibration defined according to the material (raw material) W occurs is defined and registered in advance.

  As shown in FIG. 3, the target material (raw material) W includes a square pipe KP, a long-angle pipe NK, an equilateral angle steel TY, an unequal angle iron FY, and a groove steel MZ. These shapes are generally known.

  A code for making the machine stand by at the timing after the A-axis rotation when the material shape and the material cross-sectional dimension are registered, and before the path processed in the XY plane mode of the processing machine 4 By outputting to NC data and restarting the machining after the vibration has settled, the machining surface is prevented from wavy.

  As shown in FIG. 4, the entire screen (window etc.) G1 is opened for registration, and materials such as square pipe KP, (equal sides) angle steel TY, channel steel MZ, etc. are displayed from the registration screen G2 included in this overall screen G1. The shape ZK is selected, and the numerical values of the width HB, the height TK, and the waiting time (second) BY associated with each selected material shape ZK are registered.

  Please refer to FIG. The registered information is displayed. For example, the material shape ZK is the equilateral mountain steel TY, and the width HB, the height TK, and the time (second) BY are registered. The material shape ZK is channel steel MZ, and the width HB, height TK, and time (seconds) BY are registered. Here, the dimensions of each shape are also registered.

  In this way, the subject is subject to the same size and the like. For example, when “output dwell” is “ON”, information (set values: material shape ZK, width HB) set in “target material information” when machining data (NC data) is created In this case, the dwell is output with the dwell time BY as a set value.

  When the material is “square pipe KP” and “width> height”, it is determined as “long-angle pipe NK”. When the material is “equilateral mountain steel TY” and “width> height”, it is judged as “unequal angle iron steel FY”. When the target material information is set, it becomes a dwell output target on condition that they match. Dwell is not output for materials that are not set in the target material information.

  The dwell output timing will be described. The output timing of the dwell is before the path (element) processed in the XY plane mode (G17) after the A-axis rotation. As the target route types, in the case of the square pipe KP and the long-angle pipe NK, the outer shape (when there is a cutting element in the X direction), the hole straddling the surface (when there is a cutting element in the X direction), and other paths (X direction) Regardless of the presence or absence of the cutting element. In the equilateral angle steel TY, the unequal angle steel FY, and the grooved steel MZ, all the paths (regardless of the presence or absence of cutting elements in the X direction). The other paths include center punches, markings, open paths, fixed holes, and irregular holes.

  When there is a cut processed in the XY plane mode (G17) after the A-axis rotation, depending on the material to be output before the cut after the A-axis rotation, “If there is a cut in the X direction”, “There is a cut It is fixed in “Case”, but it is also possible to select which one to use.

  In addition, in the square pipe KP and the long-angle pipe NK, when there is a cutting element in the X direction, in the equilateral angle steel TY, the unequal angle steel FY, and the groove steel MZ, regardless of the presence or absence of the cutting element in the X direction, The reason for this is to reduce code output. This will be described in detail. In “when there is a cut in the X direction” and “when there is a cut”, the determination of “when there is a cut” increases the number of times the dwell is output, and the total machining time also increases. In addition, the 4-sided pipe material is often more moderately swayed than the 2-sided or 3-sided steel material, and in order to reduce the number of times the dwell is output, there is a “cut in the X direction. This is because the determination is made in the “case”.

  A specific example of dwell output timing will be described with reference to FIGS.

  FIG. 6 shows a model MD1 (long-angle pipe NK) as an example of the material (raw material) W. This model MD1 has a sheet metal connected by a joint L.

  Please refer to FIG. Here, although it demonstrates with reference to the figure which expand | deployed model MD1, of course, it is natural to process by rotating model MD1. The developed shape includes a cutting line. Arrows YA1 to YA7 are dwell output positions. The positions indicated by symbols S1 to S8 having a cross in the square (□) indicate elements that are not cut in the X direction in the XY plane mode (G17) processing. Further, the positions indicated by A1 to A7 indicate piercing or approach processing. A code is output to the NC data for performing such processing.

  Please refer to FIG. -Machining is started at position B1, but since the material setup angle has not changed from 0 °, no dwell is output at position B1.

  At position B1 to position B2, the machining angle has not changed, so no dwell is output.

  The machining angle changes from 0 ° to 90 ° at positions B2 to B3, and the cutting at positions B3 to B4 includes cutting in the X direction, so a dwell is output to position B3 (arrow YA1).

  Since the machining angle has not changed at positions B3 to B4, no dwell is output.

  The machining angle is changed from 90 ° to 180 ° at positions B4 to B5, and the cutting at positions B5 to B6 does not include cutting in the X direction, so no dwell is output at position B5.

  Since the machining angle changes from 180 ° to 270 ° at positions B6 to B7 and the cutting at positions B7 to B8 includes cutting in the X direction, a dwell is output to position B7 (arrow AY2).

  Since the machining angle has not changed at positions B7 to B8, no dwell is output.

  Since the machining angle changes from 270 ° to 0 ° at positions B8 to B9 and the cutting at positions B9 to B10 does not include cutting in the X direction, no dwell is output at position B9.

  At positions B10 to B11, the machining angle changes from 0 ° to 90 °, and cutting in position B11 includes cutting in the X direction, so a dwell is output to position B11 (arrow YA3).

  At positions B11 to B12, since the machining angle has not changed, no dwell is output.

  Since the machining angle changes from 90 ° to 270 ° at positions B12 to B13 and the cutting at position B13 includes cutting in the X direction, a dwell is output to position B13 (YA4).

  Since the machining angle does not change at positions B13 to B14, no dwell is output.

  In addition, regarding the subsequent machining from the position B14 to the position B34, whether or not the dwell is output is determined by the above-described determination, and if it is determined to be output, it is output to the NC data.

  Please refer to FIG. This data stores the processing results as described above. The storage items include storage items of a number BG, a start (position) KS, an end (position) SR, a machining angle change KH, a cutting XS in the X direction, and a dwell output position DI. Here, in the machining angle change KH, ◯ indicates that there is a change and × indicates that there is no change. In the cut XS in the X direction, ◯ indicates that there is a cut, and × indicates that there is no cut. In the dwell output position DI, the output position (for example, position B3, position B7, position B11, position B13, position B19, position B21, position B23, etc.) is stored when outputting.

  In X (* 1), since the approach may be a cutting that may not actually be performed, it is not determined as “cutting in the X direction”. “X-direction cutting” is determined based on whether cutting in the X direction is included from the start to the end of the previous cutting. It is determined that a dwell is output when “change of machining angle” is “Yes” and “cut in the X direction” is “Yes”.

  FIG. 10 shows a model MD2 (equilateral mountain-shaped steel TY) as another example of the material (raw material) W.

  Please refer to FIG. Here, description will be made with reference to a diagram in which the model MD2 is developed. Of course, the actual machining is performed by rotating the model MD2. The deployed shape includes a cutting line. Arrows YB1 to YB6 are dwell output positions. Furthermore, the positions indicated by the positions C1 to C8 indicate piercing or approach processing. A code is output to the NC data for performing such processing.

  Please refer to FIG. The machining is started at the position D1, but since the material setup angle is changed from 0 °, a dwell is output to the position D1 (arrow YB1).

  At positions D1 to D2, the machining angle has not changed, so no dwell is output.

  Since the machining angle has changed from 90 ° to 180 ° at positions D2 to D3, a dwell is output to position D3 (arrow YB2).

  Since the machining angle has not changed at positions D3 to D4, no dwell is output.

  Since the machining angle has changed from 180 ° to 90 ° at positions D4 to D5, a dwell is output to position D5 (arrow YB3).

  Since the machining angle does not change at positions D5 to D6, no dwell is output.

  Since the machining angle has changed from 90 ° to 180 ° at positions D6 to D7, a dwell is output to position D7 (arrow YB4).

  Since the machining angle does not change between position D7 and position D8, no dwell is output.

  Since the machining angle has changed from 180 ° to 90 ° at positions D8 to D9, a dwell is output to position D9 (arrow YB5).

  Since the machining angle does not change at positions D9 to D10, no dwell is output.

  Since the machining angle has changed from 90 ° to 180 ° at positions D10 to D11, a dwell is output to position D11 (arrow YB6).

  At positions D11 to D12, since the machining angle has not changed, no dwell is output.

  FIG. 13 shows data storing the processing results as described above. The storage items include storage items of a number BG, a start (position) KS, an end (position) SR, a machining angle change KH, a cutting XS in the X direction, and a dwell output position DI. Here, in the machining angle change KH, ◯ indicates that there is a change and × indicates that there is no change. Since it is not referred to in the cut XS in the X direction, it is described as “−”. In the dwell output position DI, when outputting, the output position (for example, position D1, position D3, position D5, position D7, position D9, position D11, etc.) is stored.

  It is determined that a dwell is output when “change of machining angle” is “Yes”.

  With reference to FIG. 14, an operation of performing a dwell output determination of a processing failure prevention unit (hereinafter referred to as a processing failure prevention system 2A) will be described. First, in step SA01, the processing failure prevention system 2A determines whether or not it is “ON” although it outputs a dwell. If “ON”, the process proceeds to step SA02. If it is not “ON” (that is, “OFF”), the process ends.

  In step SA02, the processing failure prevention system 2A determines whether or not the material (raw material) W to be processed matches all the registered material shapes ZK, width HB, and height TK. If it is determined that they match, the process proceeds to step SA03. If it is determined that they do not match, the process ends.

  In step SA03, the processing failure prevention system 2A performs dwell output processing.

  FIG. 15 shows the dwell output process. First, in step SB01, the processing defect prevention system 2A determines the material shape ZK. As a result, in the case of the square pipe KP, the process proceeds to step SB02. Subsequently, process A is performed in step SB03.

  In the case of the long-angle pipe NK, the process proceeds to step SB04. Subsequently, process A is performed in step SB05. In the case of the equilateral mountain steel TY, the process proceeds to step SB06. Subsequently, process B is performed in step SB07.

  In the case of the unequal side angle steel FY, the process proceeds to step SB08. Subsequently, process B is performed in step SB09. In the case of channel steel MZ, the process proceeds to step SB10. Subsequently, process B is performed in step SB11. In other cases, the process proceeds to step SB12.

  The process A will be described with reference to FIG. First, in step SC01, the machining failure prevention system 2A sequentially executes a loop from the first machining locus to the last machining locus.

  In step SC02, it is determined whether the processing failure prevention system 2A is not an approach. If it is determined that it is not an approach, the process proceeds to step SC03. If it is determined that this is an approach, the process proceeds to step SC05.

  In step SC03, the processing failure prevention system 2A determines whether or not the previous processing locus is different from the processing angle. If it is determined that it is different from the previous machining locus, the process proceeds to step SC04. If it is determined that it is the same as the previous machining locus, the process proceeds to step SC05.

  In step SC04, the processing failure prevention system 2A performs the process A-2.

  In step SC05, the machining defect prevention system 2A moves the process to the next machining locus.

  The process A-2 will be described with reference to FIG. First, in step SD01, the machining failure prevention system 2A sequentially executes a loop from the current machining locus until the machining angle changes.

  In step SD02, it is determined whether the processing failure prevention system 2A is cutting in the X direction. If it is determined that the cut is in the X direction, the process proceeds to step SD03. If it is determined that the cutting is not in the X direction, the process proceeds to step SD04.

  In step SD03, the processing failure prevention system 2A sets the dwell output flag = “ON”. Subsequently, the process A-2 loop is terminated.

  In step SD04, the machining defect prevention system 2A advances the process to the next machining locus.

  In step SD05, the machining failure prevention system 2A determines whether or not the dwell output flag is “ON”. If it is determined that the dwell output flag is “ON”, the process proceeds to step SD06. The process ends when it is determined that the dwell output flag is not “ON”.

  In step SD06, the processing failure prevention system 2A outputs a dwell after a processing angle command for the processing trajectory of the processing A.

  The process B will be described with reference to FIG. First, in step SE01, the machining defect prevention system 2A sequentially executes a loop from the first machining locus to the last machining locus.

  In step SE02, it is determined whether the processing failure prevention system 2A is not an approach. If it is determined that it is not an approach, the process proceeds to step SE03. If it is determined that this is an approach, the process proceeds to step SE05.

  In step SE03, the processing failure prevention system 2A determines whether or not the previous processing locus is different from the processing angle. If it is determined that it is different from the previous machining locus, the process proceeds to step SE04. If it is determined that it is the same as the previous machining locus, the process proceeds to step SE05.

  In step SE04, the machining failure prevention system 2A outputs a dwell after a machining angle command for the current machining locus.

  In step SE05, the machining defect prevention system 2A moves the process to the next machining locus.

  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.

  For example, instead of outputting a code to stop the machine for a certain period of time in NC data, the vibration is detected by some other device (camera, contact detection, etc.), and machining is resumed after the vibration has stopped. Change the timing to stop the machine for a certain period of time. (Except after A-axis rotation or when there is X-axis movement after A-axis rotation)

1 Processing System 2 Automatic Programming Device 2A Processing Failure Prevention Unit (Processing Failure Prevention System)
3 NC device 4 Processing machine 5 Device 6 Device 7 Laser processing head W Material (raw material)

Claims (4)

In the processing defect prevention system related to the control of a processing machine that rotates and processes materials,
It has code generation means to generate code that waits for the machine for a set time in NC data,
The said code generation means produces | generates the said code | cord | chord in the location of the timing after the rotation of the said material which a vibration generate | occur | produces in the said material, The processing failure prevention system characterized by the above-mentioned.   The code generation means is a timing after the rotation of the A axis where the vibration occurs when the material matches the registered material shape and material cross-sectional dimension, and before the path processed in the XY plane mode. The machining defect prevention system according to claim 1, wherein the machining surface is prevented from being wavy by outputting a code to the NC data and restarting machining after the shaking is stopped.   3. The processing failure prevention system according to claim 2, wherein the registered material shape is a square pipe, a long-angle pipe, an angle steel, an unequal angle iron, or a groove steel. In the processing defect prevention method related to the control of the processing machine that rotates and processes the material,
The code generation means generates a code for waiting for the machine for a set time in the NC data,
The code generation means generates the code at a position at a timing after the rotation of the material at which the material is shaken.

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