JP5356106B2 - Numerical control data generator - Google Patents

Description

  The present invention relates to a numerical control data creating apparatus that creates numerical control data for controlling a machine tool or the like.

  Conventionally, NC (Numerical Control) control, which is a machining program for producing a workpiece based on the drawing of the workpiece drawn by a CAD / CAM (Computer Aided Design / Computer Aided Manufacturing) system. Data has been created. Specifically, first, an operator creates a drawing of a desired workpiece using CAD. The operator adds machining conditions and the like to the drawing data created by the CAD, and creates NC control data for producing the workpiece by the CAM. By inputting this NC control data to the laser processing machine, the laser processing machine performs processing as indicated by the NC control data. For example, by processing a steel plate two-dimensionally, a plate-like workpiece can be cut out from the steel plate. As described above, a technique for creating NC control data by a CAD / CAM system is known. Further, various new techniques have been proposed for such techniques (see, for example, Patent Document 1 and Patent Document 2).

  Here, when welding to a workpiece, it is necessary not only to cut out the workpiece but also to perform groove processing on the workpiece. The groove processing is processing in which a corner portion of a workpiece is cut obliquely so that the workpiece can be welded. If NC control data is also created for groove processing, the groove processing can be automatically performed by inputting the NC control data to the laser processing machine. Further, if it is assumed that the groove processing is also included in the NC control data for cutting out the workpiece in advance, the laser processing machine performs processing including cutting of the workpiece and groove processing. Therefore, it is preferable to use a CAD / CAM system that can also create NC control data for groove processing. NC control data that does not include groove machining is created by the CAD / CAM system, and the operator makes corrections and additions to the created NC control data to create NC control data that includes groove machining. May be.

JP 2006-351026 A Japanese Patent Laid-Open No. 05-261643

  However, introducing a CAD / CAM system that can create NC control data including groove processing has a problem that it is costly and time consuming.

  Further, NC control data including groove machining based on NC control data created by a CAD / CAM system incapable of creating NC control data including groove machining depends on machining conditions. Etc. are difficult to derive, and are troublesome and take a long time.

  Therefore, the present invention is an invention made in view of the above-described circumstances, and its object is to easily create NC control data including groove machining based on NC control data not including groove machining. A numerical control data creation device is provided.

As a result of various studies, the present inventor has found that the above object is achieved by the present invention described below. That is, the numerical control data creation device according to an aspect of the present invention includes a data input unit that receives numerical control data for laser processing, a display unit that displays a machining path based on the numerical control data, and the display unit. In the displayed machining path, an operation input unit for selecting a groove machining location and inputting a groove condition at the groove machining location, and a machining condition corresponding to the shape of the groove machining location and the groove condition , A shape recognition unit for recognizing the shape of the groove machining location selected by the operation input unit, the shape of the groove machining location recognized by the shape recognition unit, and the opening A processing condition corresponding to the groove condition of the pre-machined part is selected from the storage unit, and the numerical control data is converted so that the groove machined part is machined using the groove condition and the machining condition. And a data conversion section, recognized by the shape recognizing unit, when the shape of the beveling portion is arc, the machining conditions include the processing speed, the beveling portion When the shape is an arc, the machining speed is that of the surface including at least the radius of the arc and the machining path of the workpiece to be machined, when the shape of the groove machining portion is a straight line. The thickness calculated in the normal direction and the groove angle calculated by subtracting 90 degrees from the acute angle formed by the normal direction and the normal direction of the surface generated by the groove processing. It is a value obtained by multiplying 1 value .
Note that the processing speed is a moving speed of the laser on the processing surface in a state where the workpiece is irradiated with the laser and is processed, and is a cutting speed.

  The groove condition means a condition set by the operator among conditions that need to be set in the groove machining. For example, groove type, groove range, groove parameter (route amount, plate thickness, groove angle, groove offset amount, etc.), corner setting, cutout setting, cutout setting, and route cut setting. In addition, the machining conditions are conditions in the groove machining in which it is difficult for the operator to calculate optimum values such as the machining speed in the groove machining, the laser output, the laser pulse frequency, and the machining sequence. Say.

  Accordingly, NC control data including groove machining can be easily created based on the created NC control data by a CAD / CAM system that cannot create NC control data including groove machining. Therefore, even if the CAD / CAM system currently used cannot create NC control data including groove machining, NC control data including groove machining can be easily changed without changing the CAD / CAM system. Can be created. Therefore, it is not necessary to newly introduce a CAD / CAM system, and the cost is low and it does not take time and effort. Further, since the machining conditions that are difficult for the operator to calculate are automatically set, the operator does not need to derive the machining conditions by test machining or the like, and there is no trouble. In addition, since NC control data including groove processing can be easily created, the laser processing machine can be automatically operated for groove processing, and the groove processing can be unmanned. Further, since preferable machining conditions are set according to the groove conditions and the like, it is possible to create NC control data that can be applied to various groove machining.

In addition, a numerical control data creation device according to another aspect of the present invention includes a data input unit that receives numerical control data for laser processing, a display unit that displays a machining path based on the numerical control data, and the display In the machining path displayed on the part, an operation input unit for selecting a groove machining location and inputting a groove condition in the groove machining location, corresponding to the shape of the groove machining location and the groove condition A storage unit that stores processing conditions; a shape recognition unit that recognizes the shape of the groove processing portion selected by the operation input unit; and a shape of the groove processing portion that is recognized by the shape recognition unit; The numerical control data is converted so that a machining condition corresponding to the groove condition of the groove machining part is selected from the storage unit, and the groove machining part is machined using the groove condition and the machining condition. De And a data conversion section, recognized by the shape recognition section, the shape of the beveling portion, if a concave circular arc, the machining conditions, contains the output and the laser pulse frequency of the laser and has the output of the laser when the shape of the groove machining spot is an arc of the concave, the shape of the groove machining spot to an output of the laser when it is straight, at least the concave arc Radius, thickness in the normal direction of the surface including the machining path of the workpiece to be machined, and acute angle formed by the normal direction and the normal direction of the surface generated by the groove machining from 90 degrees The value obtained by multiplying the second value calculated using the groove angle, which is a subtracted difference, and the pulse frequency of the laser when the shape of the groove machining portion is the concave arc is When the shape of the groove machining location is a straight line The pulse frequency of the serial laser, a value obtained by multiplying the second value.
The concave arc means an arc formed so as to be convex on the workpiece side.

  As a result, when there are a plurality of groove machining portions having the same shape on the same workpiece, it is not necessary to input groove conditions and the like for all the groove machining portions, and the working time can be shortened.

Further, in the above numerical control data creation device, when the shape of the groove machining portion recognized by the shape recognition unit is a concave arc, the machining conditions include the laser output and the laser pulse. includes the frequency, the output of the laser when the shape of the groove machining spot is an arc of the concave, the output of the laser when the shape of the beveling portion is straight, at least the The radius of the concave arc, the thickness in the normal direction of the surface including the machining path of the workpiece to be machined, and the acute angle between the normal direction and the normal direction of the surface generated by groove machining And a second value calculated by using a groove angle that is a difference obtained by subtracting from 90 degrees, and the pulse of the laser when the shape of the groove machining portion is the concave arc The frequency is the groove processing location The pulse frequency of the laser when the shape is a straight line, it is not preferable that a value obtained by multiplying the second value.

  As described above, since a preferable value stored in the storage unit in advance is used for the preferable processing speed in the arc groove processing, which is difficult for the operator to calculate, the processing speed is automatically set. . Therefore, there is no trouble for the operator to derive the processing speed by test processing or the like, and the working time can be shortened.

The numerical control data creation device further includes an identical shape detection unit that detects a part having the same shape as the groove machining part recognized by the shape recognition part in the machining path based on the numerical control data. In addition, the data conversion unit is configured to process the part having the same shape as the groove processing part using the input groove condition and the processing condition selected from the storage unit. it is not preferable to convert the numerical control data.

  As described above, since preferable values stored in the storage unit in advance are used for the preferable laser output and laser pulse frequency in the groove processing of the concave arc, which is difficult for the operator to calculate, the laser output The pulse frequency of the laser is automatically set. Therefore, there is no trouble for the operator to derive the laser output and the laser pulse frequency by test processing or the like, and the working time can be shortened.

  In the numerical control data creation device described above, it is preferable that the processing conditions include a processing order.

  As described above, since a preferable processing order stored in advance in the storage unit is used, the processing order is automatically set. Therefore, the operator does not have to worry about the processing order, and the working time can be shortened.

  In the numerical control data creation device described above, the operation input unit can also input the machining conditions, and the data conversion unit operates the operation of the groove machining portion selected by the operation input unit. It is preferable to convert the numerical control data so as to perform machining using the machining conditions input by the input unit and the groove conditions input by the operation input unit.

  Thereby, not only the machining conditions are automatically set, but also the machining conditions desired by the operator can be incorporated into the NC control data.

  According to the present invention, it is possible to provide a numerical control data creation device capable of easily creating NC control data including groove machining based on NC control data not including groove machining.

It is a block diagram which shows the electric constitution of the numerical control data creation apparatus which concerns on this Embodiment. FIGS. 2A and 2B are diagrams for explaining types of groove machining, FIG. 2A is a diagram for explaining a Y groove, and FIG. 2B is a diagram for explaining a V groove. FIGS. 3A and 3B are diagrams for explaining the operation of the laser processing machine in groove processing, FIG. 3A is a diagram for explaining the operation of cutting a workpiece from a workpiece, and FIG. It is a figure for demonstrating the operation | movement which carries out a front process. 4A is a plan view showing an outer R steel plate, and FIG. 4B is a plan view showing an inner R steel plate. It is a flowchart which shows operation | movement of the numerical control data creation apparatus which concerns on this Embodiment. It is a figure explaining the display in the display part of the numerical control data creation apparatus which concerns on this Embodiment. It is a figure explaining the state which displayed the groove processing location in the display part of the numerical control data creation apparatus which concerns on this Embodiment. FIG. 8A is a diagram illustrating NC control data before and after conversion by the numerical control data creation device according to the present embodiment, and FIG. 8A is a diagram illustrating NC control data before conversion, and FIG. ) Is a diagram showing NC control data after conversion. FIG. 9A is a second diagram showing NC control data before and after conversion by the numerical control data creation device according to the present embodiment, and FIG. 9A is a diagram showing NC control data before conversion, and FIG. ) Is a diagram showing NC control data after conversion.

  Embodiments according to the present invention will be described below with reference to the drawings. In addition, the structure which attached | subjected the same code | symbol in each figure shows that it is the same structure, The description is abbreviate | omitted.

  The numerical control data creation device according to the present embodiment is a device that creates NC control data that is a machining program for instructing a machining procedure to a laser beam machine equipped with an NC device. The NC control data is input to the laser processing machine, and indicates the processing procedure and processing method of the laser processing machine. A laser beam machine cuts a workpiece by irradiating a high-power laser. Therefore, a workpiece can be obtained by cutting the workpiece with a laser beam machine.

  More specifically, the numerical control data creation device according to the present embodiment is configured to obtain NC control data, which is a two-dimensional machining program created by a CAD / CAM system and includes a step of cutting a workpiece from a plate-shaped material. This is a device that incorporates a groove machining process and creates new NC control data. In the following, the plate-shaped material before cutting is referred to as a workpiece, and the cut material is referred to as a workpiece.

  FIG. 1 is a block diagram showing an electrical configuration of a numerical control data creating apparatus according to the present embodiment. As shown in FIG. 1, the numerical control data creation device 100 according to the present embodiment includes a data input unit 1, a control unit 2, a display unit 3, an operation input unit 4, and a storage unit 5. Yes. The numerical control data creation device 100 can be realized by using, for example, a personal computer (hereinafter referred to as a personal computer).

  The data input unit 1 is an interface for receiving NC control data sent from the outside, and is, for example, a USB terminal. The control unit 2 is, for example, a CPU (Central Processing Unit) of a personal computer, and controls arithmetic processing and the operation of each member. The operation input unit 4 is used to send an instruction to the numerical control data creation device 100 when operated by an operator, and is, for example, a keyboard or a mouse. The display unit 3 displays an image, such as a CRT (Cathode Ray Tube) display, an LCD (Liquid Crystal Display), an organic EL (Electro-Luminescence) display, and a plasma display. The display unit 3 displays the laser path (machining path) in the workpiece in the operation of the laser processing machine designated by the NC control data input via the data input unit 1. Here, since a workpiece such as a steel plate is cut by a laser, the laser path indicates the cutting location, and the operator can understand the shape of the workpiece by looking at the displayed path. Therefore, it can be said that the shape of the workpiece is displayed on the display unit 3.

  The storage unit 5 is, for example, a hard disk and a RAM (Random Access Memory). And the memory | storage part 5 stores the data in a calculation process and a control process temporarily, and memorize | stores the control program, process conditions, etc. of the numerical control data creation apparatus 100. FIG.

  The control unit 2 functionally includes a drawing data conversion unit 11, a shape recognition unit 12, a data conversion unit 13, and an identical shape detection unit 14. Based on the NC control data input from the data input unit 1, the drawing data conversion unit 11 creates drawing data for instructing the display unit 3 to draw a laser path and display it with a line. That is, the NC control data is converted into drawing data. The shape recognizing unit 12 recognizes the location of the groove machining location selected by the operator, that is, the shape of the groove machining location, in the laser path designated by the NC control data. The data conversion unit 13 corrects or adds to the NC control data input from the operation input unit 4 to convert the NC control data. The same shape detection unit 14 detects a workpiece having the same shape as the workpiece recognized by the shape recognition unit 12 in the laser path based on the NC control data.

  Here, the groove processing will be described. A laser beam machine cuts and manufactures a workpiece from a workpiece by irradiating and cutting a laser beam in a vertical direction with respect to a processing surface of a plate-like workpiece. Therefore, a workpiece whose cut surface is perpendicular to the machining surface is produced. The processed surface is a surface on the workpiece that is irradiated with a laser. In the case where such a workpiece is further subjected to a welding process, it is necessary to cut the portion to be welded obliquely in the cross-sectional shape, that is, to drop the corner. And processing which drops a corner in this way is called groove processing. FIG. 2 is a diagram for explaining types of groove processing, FIG. 2 (A) is a diagram for explaining a Y groove, and FIG. 2 (B) is a diagram for explaining a V groove. FIG. 2A and FIG. 2B are views showing the cross-sectional shape of the workpiece 6 after the groove processing, respectively. In the groove processing shown in FIG. 2A, a part of the side surface of the workpiece 6 is processed obliquely with respect to the processing surface. The groove processing shown in FIG. 2A is called a Y groove. The Y groove is a groove process in which the side surface is processed obliquely while leaving a part of the side surface of the workpiece 6. In the Y groove, the remaining thickness of the side surface portion is referred to as a route amount, and an oblique angle is referred to as a groove angle. The remaining side surface, that is, the surface perpendicular to the workpiece 6 is referred to as a root surface. Further, the groove processing shown in FIG. 2 (B) is a method in which the side surface of the workpiece 6 is processed obliquely with respect to the processing surface, and corresponds to a case where the root amount is set to 0 in the Y groove. The groove processing shown in FIG. 2B is called a V groove. Note that the types of groove include a Y groove and a V groove, and each has a front groove and a back groove. In addition, there are a K groove, an X groove, and the like. These can be realized by using a Y groove and a V groove.

  FIG. 3 is a diagram for explaining the operation of the laser processing machine in the groove machining, FIG. 3 (A) is a diagram for explaining the operation of cutting out the workpiece from the workpiece, and FIG. 3 (B) is the machining. It is a figure for demonstrating the operation | movement which carries out groove processing of a thing. As shown in FIG. 3A, holes are formed in the irradiated portion of the steel plate 7 by irradiating the laser L perpendicularly to the processing surface 7a of the plate-shaped steel plate 7 from the head 8 of the laser processing machine. The This hole is called piercing. Then, by moving the head 8 while maintaining the state in which the laser L is perpendicular to the processing surface 7a, the laser L irradiation position on the steel plate 7 moves, and the steel plate 7 is cut.

  The steel plate 7 cut into a desired shape is subjected to groove processing. Here, a Y groove is applied. In the Y groove, the cut surface of the steel plate 7 is processed again by the laser L irradiated perpendicularly to the processed surface 7a in order to adjust the shape of the root surface. That is, the irradiation position of the laser L moves by a predetermined amount (offset amount) from the cutting position to the steel plate 7 side, and the irradiation position of the laser L moves along the cutting surface. This is called groove processing. As described above, in the Y groove, the cut surface (root surface) is prepared by irradiating the cut surface with the laser L in the same manner as in the case of cutting. Then, as shown in FIG. 3B, the head 8 is tilted with respect to the processed surface, and the steel plate 7 is irradiated with the laser L to cut the corner portion of the steel plate 7a. In this way, groove processing is performed.

  In the machining with the head 8 tilted, that is, in the groove machining, when the groove machining position is a straight line, the speed (straight line portion) is changed from the speed at the time of the cutting process, which is the previous stage of the groove machining. The head 8 may be moved at a moving speed). However, when the groove processing portion includes a curve, that is, an arc, it is preferable to further change the speed according to the size of the arc. In the groove processing, the head 8 is tilted to form a cut surface that is oblique to the cut surface with respect to 7a. Therefore, there is a high possibility that the area of the cut surface becomes larger than that during cutting. Therefore, it is preferable that the moving speed of the head 8 at the time of groove processing is slower than that at the time of cutting. Note that the moving speed of the head 8 at the time of groove processing is determined to be a preferable value based on the size of the cut surface between the groove processing and the cutting processing. These preferable values should just be memorize | stored in the memory | storage part 5, for example. In addition, the moving speed of the head 8 at the time of groove processing is not limited to the case where it is slower than that at the time of cutting, and may be set to a preferable value appropriately according to each condition. In this way, by setting the moving speed of the head 8 to a preferable value, higher performance processing is performed.

  FIG. 4 is a plan view showing the shape of an arc, FIG. 4 (A) is a plan view showing an outer R steel plate, and FIG. 4 (B) is a plan view showing an inner R steel plate. When the laser beam L is irradiated obliquely to the steel plate 7 (groove processing), as shown in FIGS. 4A and 4B, the groove processing portion 21 of the steel plate 7 is an arc, It is preferable to change the processing conditions such as the moving speed of the head 8 when the pre-processing portion is a straight line. As shown in FIG. 4 (A), when a circular arc formed outwardly from the steel plate 7 is used as a groove machining location 21 (hereinafter referred to as “outer R”), the moving speed (machining speed) of the head 8 is set. It is preferable to use a value calculated by the following equation (1).

Movement speed = Linear part movement speed × R / (R−α ₁ (t−r) tan θ) (1)
In equation (1), the straight line portion moving speed is the moving speed of the head 8 when the groove machining portion is a straight line. In Equation (1), R is the radius of the arc, t is the thickness of the steel plate 7, r is the route amount, and θ is the groove angle. Α ₁ is a bias coefficient and is a value obtained by measuring in advance.

  Further, as shown in FIG. 4B, when a circular arc formed inwardly from the steel plate 7 is used as the groove processing portion 21 (hereinafter referred to as inner R), the moving speed of the head 8 is set as follows. It is preferable to use a value calculated by the equation (2). Further, at this time, it is preferable that the output of the laser L is a value calculated by the equation (3) and the pulse frequency of the laser L is a value calculated by the equation (4).

Movement speed = Linear part movement speed × R / (R−α ₄ (t−r) tan θ) (2)
Output = Linear part output × R / (R−α ₂ (t−r) tan θ) (3)
Frequency = Linear part frequency × R / (R−α ₃ (t−r) tan θ) (4)
In equation (2), the straight line portion moving speed is the moving speed of the head 8 when the groove machining portion is a straight line. In Expression (3), the straight line portion output is an output when the groove machining portion is a straight line. Moreover, in Formula (4), a linear part frequency is a pulse frequency in case a groove processing location is a straight line. A preferable value is determined for the linear portion output and the linear portion frequency from the moving speed of the head 8 at the time of groove machining. These preferable values should just be memorize | stored in the memory | storage part 5, for example. It should be noted that the straight portion output and the straight portion frequency may be the same as the output and frequency at the time of cutting by changing the moving speed of the head 8 in the groove processing as compared with the time of the cutting processing. Moreover, in Formula (2), Formula (3), and Formula (4), R is the radius of the arc, t is the plate thickness of the steel plate 7, r is the route amount, and θ is the groove angle. . Α ₂ , α _3, and α ₄ are bias coefficients of the respective expressions, and are values obtained by measuring in advance.

  Next, the operation of the numerical control data creation device 100 according to the present embodiment will be described with reference to FIG. FIG. 5 is a flowchart showing the operation of the numerical control data creation device according to this embodiment. First, the operator creates a drawing showing the desired shape of the workpiece using CAD. Furthermore, NC control data, which is a machining program for producing a desired workpiece, is created from the drawing data using CAM. At this time, the machining control conditions such as the moving speed of the head of the laser machining apparatus, the laser output and the pulse frequency are also input, and NC control data corresponding to them is created.

  The NC control data is input to the numerical control data creation device 100 via the data input unit 1. If this NC control data is input to the NC of the laser processing machine as it is, the laser processing machine operates so as to produce a workpiece shown in the drawing created using CAD. NC control data input from the data input unit 1 is converted into drawing data by the drawing data conversion unit 11, and the display unit 3 displays a laser path based on the drawing data. Here, the display of the display unit 3 will be described. FIG. 6 is a diagram for explaining display on the display unit of the numerical control data creation device according to the present embodiment. As shown in FIG. 6, the laser path is displayed on the display unit 3 together with the coordinates (S101). In FIG. 6, the laser path includes a path 25 indicated by N10, a path 26 indicated by N20, and a path 27 indicated by N30. When this NC control data is input, the laser processing machine performs processing as shown below.

  First, laser is irradiated along the path 25. Specifically, the workpiece is irradiated with laser from the right end of the path 25 in the figure, and the laser is moved along the path 25 from right to left in the figure. When the laser moves to the left end of the path 25, the laser irradiation is stopped. Next, the laser is irradiated along the path 26. Specifically, in the drawing of the path 26, the workpiece is irradiated with a laser from the lower end, and the laser is moved along the path 26. When the laser moves to the end of the path 26, the laser irradiation is stopped. Next, laser is irradiated along the path 27. Specifically, the workpiece is irradiated with laser from the upper end in the figure of the path 27, and the laser is moved along the path 27 from the top to the bottom in the figure. In this way, a workpiece having a shape surrounded by the path 25, the path 26, and the path 27 is produced.

  However, this NC control data does not include groove processing. Accordingly, the operator operates the icon displayed on the display unit 3 with, for example, a mouse while viewing the route 25, the route 26, and the route 27 displayed on the display unit 3, and selects a place to perform groove processing. . FIG. 7 is a diagram for explaining a state in which the groove machining portion is displayed on the display unit of the numerical control data creation device according to the present embodiment. As shown in FIG. 7, a part of the path 25 and the path 26 is represented by broken lines on the display unit 3. In the display shown in FIG. 6, the operator selects a groove machining location using the mouse, and as shown in FIG. 7, the groove machining location is indicated by a broken line. In addition to changing the line type such as a broken line and displaying the groove processing portion, the color may be changed, for example.

  Furthermore, the operator inputs a groove condition using the keyboard which is the operation input unit 4. The input of the groove condition may be, for example, an interactive format. That is, when a groove machining location is selected, a message is displayed on the screen of the display unit 3 so as to input a groove condition, and all necessary groove conditions are input when input is made in accordance with the message. It is also possible to do it.

  Here, the groove conditions include a groove type, a groove range, a groove parameter, a corner setting, a cutout setting, a cutout setting, a route cut setting, and the like. As described above, in the present embodiment, the groove type is intended only for the Y groove and the V groove. The groove range is a groove machining location and has already been selected on the screen of the display unit 3. The groove parameters are, for example, parameters such as a route amount, a plate thickness, a groove angle, and a groove offset amount. The corner setting is to set a processing method for a corner portion (corner portion in plan view) of the workpiece, and the processing method includes, for example, settings such as loop, cut-off, and arc. When these corners are set, the parameters related to them are also set. In addition, the cutout setting is a condition setting when starting cutting with a laser in groove processing. When these cutout settings are made, settings are also made for each parameter related thereto. Further, the cut-off setting is a condition setting when the cutting by the laser in the groove processing is finished. And when these cut-off settings are made, they are also set for each parameter related thereto. Also, the route cut setting parameters include whether to continue the route cut when performing groove machining from a linear shape to an arc shape or from an arc shape to a linear shape, etc. It is a parameter to set. The input groove conditions may be stored in the storage unit 5.

  And the shape recognition part 12 recognizes the shape of the selected groove processing location (S102). Specifically, it is determined whether or not the shape is linear, whether it is outside R or inside R if it is not linear, the value of radius R in that case, and the like. These can be obtained based on the input NC control data.

  Then, the data conversion unit 13 performs processing for adding to the NC control data the input groove parameters other than the route amount and the groove processing offset amount (S103). That is, the data conversion unit 13 performs processing for rewriting the NC control data by adding the groove parameter. Further, the data conversion unit 13 determines whether or not the input route amount is larger than 0 (S104). If the route amount is 0, it can be determined that it is not a Y groove but a V groove. If the groove type is also input, the route amount may be set to 0 for the V groove. When the route amount is larger than 0, the data conversion unit 13 performs processing for adding the route amount and the offset amount for the groove processing to the NC control data (S105). That is, the data conversion unit 13 performs a process of rewriting the NC control data by adding the route amount and the offset amount for the groove processing.

  When it is determined in step S104 that the route amount is not larger than 0, and after step S105, the data conversion unit 13 determines whether the shape of the groove machining portion is the outer R or the inner R (S106). When the data conversion unit 13 determines that the shape of the groove machining location is the outer R or the inner R, it further determines whether or not the shape of the groove machining location is the inner R (S107). When the data conversion unit 13 determines that the shape of the groove processing portion is not the inner R, that is, the outer R, the equation (1) stored in the storage unit 5 is added to the NC control data. Processing is performed (S108). As a result, the NC control data is rewritten by adding the processing speed. In addition, without adding Formula (1) to NC control data, the control part 2 calculates processing speed using Formula (1), and the data conversion part 13 adds that value to NC control data. Also good. In step S107, when the data conversion unit 13 determines that the shape of the groove machining portion is the inside R, the above equations (3) and (4) stored in the storage unit 5 are added to the NC control data. (S109). As a result, the NC control data is rewritten by adding the laser output and the laser pulse frequency. In addition, without adding the formulas (3) and (4) to the NC control data, the control unit 2 calculates the laser output and the pulse frequency using the formulas (3) and (4), and converts the data. The unit 13 may add the value to the NC control data. Then, the process proceeds to step S108. When the process proceeds from step S109 to step S108, the data conversion unit 13 uses the above equation (2) stored in the storage unit 5 instead of the equation (1). In this way, by using the expressions representing the processing conditions such as the processing speed, laser output and laser pulse frequency stored in advance, it is possible to apply preferable processing conditions in accordance with the groove conditions in the NC control data. Is possible.

  If it is determined in step S106 that the shape of the groove machining location is not the outer R or the inner R, and after step S108, the data conversion unit 13 determines whether corner setting has been made (S110). If the data conversion unit 13 determines that the corner setting has been made, the data conversion unit 13 performs processing for adding the corner setting (S111). That is, the data conversion unit 13 performs a process of rewriting the NC control data by adding a corner setting. If it is determined in step S110 that no corner is set, and after step S111, the data conversion unit 13 determines whether a cut point, a cut-off point, and an additional point are set (S112). .

  If the data conversion unit 13 determines that the cut point, cut-off point, and additional point are set, the data conversion unit 13 performs processing for adding the cut point, cut-off point, and additional point to the NC control data (S113). ). That is, the data conversion unit 13 performs a process of rewriting the NC control data by adding each of the cut-out point, the cut-off point, and the additional point. Through the above processing, NC control data including groove machining is created. When it is determined in step S112 that the cut point, the cut-off point, and the additional point are not set, and after step S113, the creation of the NC control data including the groove processing is completed. Outputs the created NC control data including the groove processing to the outside of the numerical control data creation device 100 from an output unit (not shown) (S114). By inputting the output NC control data including groove processing to the laser processing machine, the laser processing machine performs groove processing and cut out the workpiece from the workpiece.

  In the numerical control data creation device 100 of the present embodiment, the created NC control data is created in consideration of the processing order. For example, it is preferable to set the processing order so that the processing time including the groove processing can be further shortened. In laser processing, a steel sheet is cut by a laser in a state where a part of the steel sheet, which is a workpiece, is fixed to a table of a laser processing machine by a fixture such as a jig. In this case, for example, if the work piece is completely cut out from the steel plate before the groove processing, the work piece is not fixed to the table, and there is a possibility that there is a problem that accurate groove processing cannot be performed. is there. Therefore, in order to avoid such a problem, in the numerical control data creation device 100 of this embodiment, it is preferable to create NC control data in consideration of the processing order.

  In the above description, the data conversion unit 13 performs a process of adding and rewriting each groove condition to the NC control data. Specifically, the storage unit 5 stores a part of the NC control data related to each groove condition. Is stored in advance, and the groove condition may be input to a part of the NC control data and additionally described in the NC control data.

  Furthermore, in laser processing, a plurality of workpieces having the same shape may be cut out from one steel plate. In such a case, if a groove machining location is selected for each workpiece, the work takes a long time. Therefore, in the numerical control data creation device 100 according to the present embodiment, a groove machining location is selected for one workpiece, a groove condition is input, and a workpiece having the same shape is input by the operation input unit 4. Are instructed to have the same groove condition, the same shape detection unit 14 detects a route having the same shape using the input NC control data, and the data conversion unit 13 detects the same. The NC control data is converted so as to add the same groove condition and machining condition as the workpiece into which the groove condition has been input. That is, even if the workpiece is swirled and arranged, if the shape is the same, the workpiece is recognized as the same workpiece, and the same groove condition and machining condition as the workpiece for which the groove condition has already been input are added. NC control data is converted. For a workpiece having the same shape, the machining program can be easily converted by converting the origin position and rotating it. Thereby, work time can be shortened.

  Further, for example, the processing order may include the processing order. The numerical control data creation device 100 according to the present embodiment selects a preferable processing order so as to efficiently perform processing in a laser processing machine, and creates NC control data that satisfies the processing order. Also good. In addition, as described above, there is a possibility that the laser processing machine may not be able to perform accurate processing depending on the processing order. However, a preferable processing order is selected so that such a problem does not occur. The NC control data may be created so as to be the processing order. In such a case, for example, the storage unit 5 stores conditions such as a preferable combination of machining steps, and after the data conversion unit 13 creates NC control data including groove machining, the content of the NC control data is If the conditions are the same as the stored conditions, the NC control data may be converted so as to obtain a preferable combination of machining steps.

  Further, it is preferable that the operator can display the converted NC control data on the display unit 3 and correct the NC control data using a keyboard or the like. Thus, since NC control data can be corrected manually, desired NC control data can be created. Also, the machining conditions can be input by the operator, and NC control data including desired machining conditions that are not values calculated by the numerical control data creation device can be created.

  Next, the NC control data before being converted and the NC control data after being converted by the numerical control data creating apparatus 100 according to the present embodiment will be shown. FIG. 8 is a first diagram showing NC control data before and after conversion by the numerical control data creation device according to the present embodiment, and FIG. 8A is a diagram showing NC control data before conversion. FIG. 8B shows the NC control data after conversion. FIG. 9 is a second diagram showing NC control data before and after conversion by the numerical control data creation device according to the present embodiment, and FIG. 9A shows NC control data before conversion. FIG. 9B shows the NC control data after conversion. 8 (A) and 8 (B), the groove processing portion has a linear shape, and FIGS. 9 (A) and 9 (B) have a curved shape in which the groove processing portion includes an arc.

  FIG. 8A gives a positioning command, piercing execution and condition setting, a cutting command, a cutting end instruction, and the like. In FIG. 8B, a groove processing command, designation of a groove range, a groove processing command, a cut-off command in groove processing, and the like are further added.

  FIG. 9A gives a positioning command, piercing execution and condition setting, a cutting command, a cutting end instruction, and the like. In FIG. 9B, a groove processing command, a groove range specification, a processing speed specification, a groove processing command, and the like are further added.

  As described above, the numerical control data conversion apparatus according to the present embodiment performs groove machining based on the NC control data created by the CAD / CAM system that cannot create NC control data including groove machining. NC control data including it can be created easily. Therefore, even if the CAD / CAM system currently used cannot create NC control data including groove machining, NC control data including groove machining can be easily changed without changing the CAD / CAM system. Can be created. Therefore, it is not necessary to newly introduce a CAD / CAM system, and the cost is low and it does not take time and effort. Further, since machining conditions that are difficult for the operator to calculate are automatically set, there is no need for the operator to calculate the machining conditions and there is no trouble. In addition, since NC control data including groove processing can be easily created, the laser processing machine can be automatically operated for groove processing, and the groove processing can be unmanned. Further, since preferable machining conditions are set according to the groove conditions and the like, it is possible to create NC control data that can be applied to various groove machining.

  In order to express the present invention, the present invention has been properly and fully described through the embodiments with reference to the drawings. However, those skilled in the art can easily change and / or improve the above-described embodiments. It should be recognized that this is possible. Therefore, unless the modifications or improvements implemented by those skilled in the art are at a level that departs from the scope of the claims recited in the claims, the modifications or improvements are not covered by the claims. To be construed as inclusive.

DESCRIPTION OF SYMBOLS 1 Data input part 2 Control part 3 Display part 4 Operation input part 5 Memory | storage part 6 Work piece 7 Steel plate 7a Processed surface 8 Head 11 Drawing data conversion part 12 Shape recognition part 13 Data conversion part 14 Same shape detection part 21 Groove processing part 25, 26, 27 Path 100 Numerical control data creation device L Laser

Claims (6)

A data input unit for inputting numerical control data for laser processing;
A display unit for displaying a machining path by the numerical control data;
In the machining path displayed on the display unit, an operation input unit for selecting a groove machining location and inputting a groove condition in the groove machining location;
A storage unit storing a machining condition corresponding to the shape of the groove machining part and the groove condition;
A shape recognition unit for recognizing the shape of the groove processing portion selected by the operation input unit;
The shape of the groove machining location recognized by the shape recognition unit and a machining condition corresponding to the groove condition of the groove machining location are selected from the storage unit, and the groove machining location is selected from the groove condition and the groove condition. A data conversion unit that converts the numerical control data so as to process using the processing conditions ;
When the shape of the groove processing portion recognized by the shape recognition unit is an arc, the processing condition includes a processing speed ,
When the shape of the groove machining portion is an arc, the machining speed is equal to the machining speed when the shape of the groove machining portion is a straight line, at least the radius of the arc, and the workpiece to be machined. Uses the thickness in the normal direction of the surface including the machining path and the groove angle, which is the difference obtained by subtracting the acute angle between the normal direction and the normal direction of the surface generated by groove processing from 90 degrees. Is a value obtained by multiplying the first value calculated by
Numerical control data creation device. A data input unit for inputting numerical control data for laser processing;
A display unit for displaying a machining path by the numerical control data;
In the machining path displayed on the display unit, an operation input unit for selecting a groove machining location and inputting a groove condition in the groove machining location;
A storage unit storing a machining condition corresponding to the shape of the groove machining part and the groove condition;
A shape recognition unit for recognizing the shape of the groove processing portion selected by the operation input unit;
The shape of the groove machining location recognized by the shape recognition unit and a machining condition corresponding to the groove condition of the groove machining location are selected from the storage unit, and the groove machining location is selected from the groove condition and the groove condition. A data conversion unit that converts the numerical control data so as to process using the processing conditions ;
When the shape of the groove machining location recognized by the shape recognition unit is a concave arc, the machining conditions include laser output and laser pulse frequency ,
The output of the laser when the shape of the groove processing portion is the concave arc is at least the radius of the concave arc, the processing of the laser output when the shape of the groove processing portion is a straight line. The difference obtained by subtracting, from 90 degrees, the thickness in the normal direction of the surface including the machining path of the target workpiece, and the acute angle between the normal direction and the normal direction of the surface generated by groove machining. Is a value multiplied by a second value calculated using the groove angle,
The pulse frequency of the laser when the shape of the groove machining portion is the concave arc is obtained by multiplying the pulse frequency of the laser when the shape of the groove machining portion is a straight line by the second value. Value,
Numerical control data creation device. Recognized by the shape recognizing section, the shape of the beveling portion is, if a concave circular arc, the machining conditions include an output and a laser pulse frequency of the laser,
The output of the laser when the shape of the groove processing portion is the concave arc is at least the radius of the concave arc, the processing of the laser output when the shape of the groove processing portion is a straight line. The difference obtained by subtracting, from 90 degrees, the thickness in the normal direction of the surface including the machining path of the target workpiece, and the acute angle between the normal direction and the normal direction of the surface generated by groove machining. Is a value multiplied by a second value calculated using the groove angle,
The pulse frequency of the laser when the shape of the groove machining portion is the concave arc is obtained by multiplying the pulse frequency of the laser when the shape of the groove machining portion is a straight line by the second value. Value,
The numerical control data creation device according to claim 1 . In the machining path by the numerical control data, further comprising the same shape detection unit for detecting a location having the same shape as the groove machining location recognized by the shape recognition unit,
The data conversion unit is configured to process the numerical value so that a part having the same shape as the groove processing part is processed using the input groove condition and the processing condition selected from the storage unit. The numerical control data creation device according to claim 1, wherein the control data is converted.   The numerical control data creation device according to claim 1, wherein the processing conditions include a processing order. The operation input unit can also input the processing conditions,
The data conversion unit is configured to process the groove processing portion selected by the operation input unit using the processing condition input by the operation input unit and the groove condition input by the operation input unit. The numerical control data creation device according to claim 1, wherein the numerical control data is converted into a numerical control data.

Images