JP2003334678A - Cad/cam apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To dispense with complicated operations when generating NC data for point-piercing and improve working efficiency of an operator. <P>SOLUTION: A CAD/CAM apparatus generating NC data comprises: a memory means setting and memorizing data for parts layout in advance; a point- piercing designating means designating a point-piercing position so as to collectively carry out piercing actions only of the data for parts layout; a point- piercing property adding means adding a point-piercing property to a designated position by the point-piercing designating means; a piercing property changing means changing a normal piercing property which is included in a position designated by the point-piercing designated means, to a beam-on property; a point-piercing path setting means setting a cutting path in advance in connection with positions adding the point-piercing property; and a NC data generating means generating NC data based on the normal piercing property, the point- piercing property, and the cutting path. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piercing process for cutting and cutting a plurality of products by a laser beam machine, a water jet machine, a plasma cutter, etc., and more particularly, a laser beam machine, a water jet machine. Create NC data that can be used for automatic programming function to create NC program data for cutting out and cutting multiple products such as processing machines and plasma cutting machines, and can perform piercing at the position where piercing should be performed in advance. CAD / CAM device and its processing method.

The present invention relates to a first piercing process of a machined plate material on CAD that can be operated by a commercially available personal computer OS, and processing data for the first piercing process, that is, NC data generation, and can be operated by a dedicated machine and a commercially available personal computer OS. It can be used as a CAD / CAM device, automatic programming device, and software.

[0003]

2. Description of the Related Art Cutting information (tool path data) in a cutting process for cutting out a product having a predetermined shape from a plate material using an NC processing device such as a laser processing machine is normally used as NC program data (NC data). CAD / CA
It is created by the M device and the automatic programming device. First, the creating means will be described below.

FIG. 6 shows the shape of a product to be cut, and shows four types of shapes to be processed, shape A to shape D.
The graphic data that defines the shape of the product to be cut is C
It is necessary to create it with the AD function or to register it in advance. As shown in the figure, for example, the rectangular shape A has two square holes a1 and a2, and the rectangular shape B has one large square hole b1. Shape C, which has an irregular outer circumference, is one small round hole c
1 is open, and the round shape D has no holes. The shapes C and D are large enough to fit into the large rectangular hole b1 opened in the shape B.

FIG. 7 is a diagram showing an example of a conventional product graphic layout. Parts A to D are displayed on a display screen of a personal computer or the like and manually operated by using a mouse or the like. With automatic processing,
Sometimes the graphic display on the screen is rotated and moved to an appropriate position. In the figure, an example is shown in which one part A of shape A, two parts B of shape B, two parts C of shape C, and three parts D of shape D are arranged. In order to reduce the waste of material, the part D is arranged in the large square hole b1 opened in the part B.

In order to avoid the problem of relatively large scratches on the product cutting surface when piercing is performed on the product cutting line of that shape when cutting the hole or outer periphery,
It shows the process of cutting the outer circumference by cutting the piercing wire from the piercing at a position apart from the product cutting line to a certain distance from the product cutting line to the product cutting line, and cutting the outer circumference. The piercing wire is added. An example of the cutting procedure will be described. For example, in the part A, the hole a1
When the cutting is completed, the fast-forward line for stopping the laser beam and moving to the next hole a2 is added by the dotted line, and the fast-forward line for moving to the next outer piercing line is also added by the dotted line. The line that is actually cut while emitting the laser light is shown by a solid line.

Here, when moving and arranging with the order of the piercing line and the route to be cut set in advance, or arranging the parts without setting the order of the piercing line and the route in advance, each part is already placed. There may be a case where an operation for adding a piercing wire or an operation for setting a cutting path is performed on a component, and these are processed by a manual operation by an operator or an automatic processing by a computer.

Depending on the product required, the degree of piercing scratches does not pose a problem, and shortening the processing time may be prioritized. In that case, no piercing wire is provided, that is, In some cases, the length of the piercing wire is set to zero and piercing is performed on the product cutting line. In any case, generally, the cutting is not performed from the end of the plate material, but piercing is first performed in each shape and then the cutting is performed from that position as a starting point. At this time, the time required for the piercing operation varies depending on the material and thickness of the material. For example, in the case of a mild steel material, it takes 10 seconds or more for a plate thickness of about 10 mm, and 20 seconds for a plate thickness of about 20 mm. Therefore, in the case of a shape having many piercing holes, it takes a lot of processing time for the piercing process of each hole.

After the component placement completed data of FIG. 7 is created, the cutting path between the components as shown in FIG. 8 is set by an operator's manual operation or a computer's automatic processing to generate NC data. In FIG. 8, the numbers in the figure indicate the order in which piercing of each piercing wire is performed, and if processing is performed in this order, for example, parts A and B
In, the respective holes are cut first before the outer circumference is cut, and before cutting the hole of the part B, another part D arranged in the hole is cut. Here, before finishing the cutting of the hole and the outer periphery of one part, it is possible to set a path for cutting the hole and the outer periphery of another part first, for convenience. It is necessary to set the route in consideration of the cutting order, such as cutting the hole in the part earlier than the outer circumference, or cutting another part in the hole if it is arranged in the hole. NC data is generated based on the pattern generated in this way, and a process of cutting out and cutting a product having a predetermined shape from a specific plate material is performed using an NC cutting device such as a laser processing machine.

Next, for example, as shown in Japanese Patent Publication No. 2600323, only piercing is performed in advance with an oxidizing gas for all positions where piercing is required, and after that, the piercing is performed after switching to a non-oxidizing gas. A process of only cutting the hole from the starting point will be described. In this specification, the process of performing only the piercing first is defined as the first piercing. In the case of piercing after this, at the time of starting the cutting operation after switching to the non-oxidizing gas, it is not necessary to perform the piercing operation for a time such as 10 seconds or 20 seconds as described above, and The cutting operation can be shortened by performing the cutting operation as soon as the laser light and the assist gas under suitable conditions are emitted.

For example, after the cutting path shown in FIG. 7 is set, the operator sets the processing path order for only the first piercing operation as shown in FIG. In the first piercing process, the outer periphery of the component is not processed, and only piercing is performed. Therefore, generally, the piercings are set in the order of closer positions, so that the route order is as shown in FIG. . Then, after performing the first piercing process at the 14th position, for example, the route for returning to the component A to be cut first and performing the cutting operation is set. In this case, as shown by the arrow in FIG. 10, a rapid feed line is set up to the piercing line of the hole a1 of the part A, and the hole a2, the part A. ． ． In the same manner as the order of numbers shown in FIG. 8, a path for continuously performing the disconnecting operation is set. Then, the operator changes the attribute added to the piercing position of the already added piercing line from the normal piercing attribute that performs piercing to the beam-on attribute that simply turns on the beam without performing piercing. This is because the piercing process has been set by the previous piercing, and thus it is not necessary to perform the normal piercing process, so that the attribute is canceled. This replacement process must be executed without forgetting all at the position set for piercing as shown in FIG. 9, for example. In addition, the operation of turning off the beam at the time of executing the previous piercing needs to be distinguished in the retreating operation of the processing head, compared with the operation of turning off the beam when the normal cutting is performed on the hole or the outer peripheral shape. In some cases, the beam-off attribute at the time of executing the previous piercing and the beam-off attribute after the normal disconnection may be switched and added.

Here, comparing FIG. 8 and FIG. 9 and exemplifying different characteristic points, in FIG.
In order to move to the position where the next cutting is performed after cutting the hole a2, the dotted line indicating the rapid feed line is set to extend from the position on the product cutting line which is the base position of the piercing line. In FIG. 9, the rapid feed line for the next processing directly extends from the front piercing position which is the tip position of the piercing wire of the hole a2. This means that in the process of performing only the first piercing shown in FIG. 9, the oxidizing gas for the first piercing is used, and the subsequent operation of cutting the piercing wire by switching the assist gas is not performed. This is because, if only the first piercing process is performed at the tip position of, the position is immediately moved to the next position. Further, in FIG. 8, it is necessary to complete the cutting of the hole before cutting the outer periphery of one part, and when another part is arranged in the hole, it is better than that hole. Although it is necessary to cut the inside parts first, in the process of performing only the first piercing as shown in FIG. 9, it is not necessary to consider the order, and the order in which the total moving distance becomes shortest and When moving to the position, the order may be set appropriately, such as the order in which the closest one is sequentially selected and set. For example, in the case of FIG. 9, the order of 7 → 8 → 9 is added in the second machining of the part B, that is, the order of “outer circumference” → “hole” → “shape in the hole” is set. As described above, the order is set such that the piercing process is performed at the outer peripheral position before the hole, but this does not pose any problem.

Next, FIG. 11 shows a comparative example of the NC data to be created in the case where the pre-piercing process is not performed and in the case where the NC data for performing the pre-piercing process is generated by the above-mentioned procedure. In the example of FIG. 11 (a) in the case where the tip piercing is not performed, cutting is performed in the order of “small round hole” → “rectangular hole” → “outer circumference”. At the tip position of each piercing wire, it is used for cutting. Since the piercing process is performed by using the same type of assist gas as the one used, it is not necessary to perform the assist gas switching process particularly in the middle. In this example, “N05”, “N10”, and “N19” in the NC data are used.
In this line, an NC code for performing normal piercing, such as "AAA", is inserted. Further, a cutting operation command is input after the normal piercing, and when reaching the beam-off position, an NC code "EEE" for performing the normal beam-off is inserted in the row of "N08", "N17" or "N27". Here, the code "AAA" is
In the recognition processing on the laser processing machine side, there is a method of recognizing that the code itself has the meaning of performing normal piercing, and this code has the meaning of calling another subprogram, and the other subprogram side There is a method of describing the operation command of normal piercing, etc., and in this way, there are cases in which a command for performing normal piercing is shown using multiple lines, which cannot be expressed by only one line such as “AAA”. . In any case, according to the command for performing the normal piercing, the normal piercing operation for the soft steel material over a time period such as ten and several seconds and twenty and several seconds is appropriately performed.

On the other hand, in the case of the tip piercing shown in FIG. 11B, an example is shown in which the tip piercing is not performed for the round hole having the small round hole and the rectangular hole. The first piercing is performed only at the positions of the piercing lines between the rectangular hole and the outer periphery, and the machining path is set so that the first piercing operation at the two locations is performed first. To explain in detail, first select the type of assist gas dedicated to the front piercing with the command in the row of “N03”, and then select “N0
Fast-forward to the position where the tip piercing of the square hole is performed in the 5th row, the first piercing is turned on in the “N06” row, and the first piercing is turned off in the “N07” row immediately at that position.
The line “N08” is moved to the outer piercing position where the first piercing is performed next, and the first piercing process is similarly performed with “N09” and “N10”. The processing of the first piercing is up to this point, and after that, the disconnection operation is started, so first, "N11"
Move to the piercing position of the first round hole to be cut on the line, but do not forget to insert the post-piercing insertion code "KKK" to switch from the assist gas dedicated to the piercing to the assist gas dedicated to the cutting. . continue,
Although cutting after the piercing line of the round hole is necessary, it is necessary to perform normal piercing processing because the tip piercing is not performed in the round hole, and the same code "AAA" used in Fig. 11 (a) is used. Used in line "N13", "N14"
A round hole cutting operation from the line to the “N16” line is performed.
Next, after moving to the tip piercing position of the rectangular hole on the “N17” line, there is no need to perform piercing at this position because the tip piercing has already been performed, and the cutting operation can be performed immediately after outputting the laser beam. The post-piercing beam-on code “CCC” is used for the “N18” row, and the rectangular hole cutting operation up to the “N25” row is performed. The same is true for the operation at the piercing position on the outer periphery of the “N27” row. In addition, in this example, there is an example where there is a position where the first piercing is not performed, such as a round hole in the figure, but when setting is made so that the first piercing is performed at all piercing positions without making such a distinction. There are also many.

[0015]

In the conventional operation of generating NC data for the first piercing, when the operation of adding the first piercing on attribute is performed, it is necessary to perform the piercing at the subsequent disconnecting operation at that position. Therefore, it was necessary to remember the operation of changing the normal piercing attribute attached to the piercing line portion to the beam-on attribute at all the positions. In addition, after completing all the pre-piercing processing with the assist gas for the first piercing, the assist gas is exchanged and the normal cutting process is performed so that the assist gas can be exchanged only once and waste is reduced. In order to do so, be sure to insert the insertion code after the first piercing, or unlike the beam-off operation at the piercing position that is usually performed with assist gas for cutting, the beam-off after the first piercing is a special first piercing off. It was necessary to add the attribute without forgetting to process it. That is, in the route setting operation to the first piercing, it is necessary to remember to perform the route setting operation for all the first piercing on attributes, which includes many elements that are prone to operation errors, and the operator's operation is complicated. there were.

Further, when the piercing is performed using the oxidizing gas, the amount of the melted plate material may be greater than that in the piercing with the non-oxidizing gas, and may be scattered far. Depending on the distance between the piercing position of the figure and the cutting line of the product, it may be necessary to determine whether or not to perform the piercing process first. Therefore, if you forget to attach it, or if you attach it at a distance that should not be attached, processing defects will occur, and you will have to perform operations while visually checking each one. There was also the problem that there was.

Considering the size of a problem that occurs later in the processing on the laser processing machine side when the operator makes an operation mistake, the operator cannot operate at all, and in the end, such a piercing operation is performed. In many cases, if the cutting method is abandoned, or even if it is not abandoned, the NC data to be generated is the same as that shown in FIG. 14A in order to avoid the occurrence of processing defects due to mistakes. As a processing in the code "AAA" inserted as a normal piercing code in this, it is said that switching to an oxidizing gas and piercing is performed and then switching to a non-oxidizing gas is completed. A method to change the setting so that the process is performed and to switch to the oxidizing gas and the non-oxidizing gas each time the piercing operation is performed, etc. Although it is possible to use it, in this case, the gas remaining in the processing machine side pipe is replaced when the gas is replaced every time piercing is performed. The amount also increases, that is, the processing time required for the entire cutting operation increases significantly.

Therefore, the present invention uses N for the first piercing process.
Eliminating troublesome operations when generating C data, and properly and automatically discriminating the operations performed by the operator's intuition while looking at the screen by processing on the computer, errors can be eliminated and high-speed processing can be performed. It is an issue to provide a pre-piercing processing function.

[0019]

CAD / C according to the present invention
The AM device inputs the graphic data defining the shape of each product as a part and generates NC data for cutting out the part from the plate material. In the CAD / CAM device, a cutting start position, a piercing attribute, a cutting path, etc. of each part. Storage means for presetting and storing the component-placed data, destination piercing designating means for designating the destination piercing position to collectively perform only the piercing operation in the component-allocated data, and the location designated by the destination piercing designating means. A destination piercing attribute adding means for adding a destination piercing attribute, a piercing attribute changing means for changing a normal piercing attribute attached to the position designated by the destination piercing designating means to a beam-on attribute, and the destination piercing Destination peer that sets the disconnection route only at the position where the attribute is added A route setting unit, the usual piercing attributes, based on the previously piercing attribute, and the cutting path comprises a NC data generation means for generating NC data.

Further, in the CAD / CAM device which inputs the graphic data defining the shape of each product as a part and generates the NC data for cutting out the part from the plate material, the cutting start position of the hole or the outer periphery of each part is set. , A piercing line setting means for adding a piercing line with a normal piercing attribute, a cutting route setting means for setting a route for sequentially cutting a hole or an outer periphery of each of the parts, and a piercing position first attribute for the piercing position of the piercing line. And a first piercing off attribute, and a piercing attribute changing means for changing the normal piercing attribute attached to the tip of the piercing line at the position to which the first piercing on attribute is added to the beamon attribute. , Destination piercing route setting means for setting the disconnection route only at the position to which the destination piercing attribute is added , NC data to be inserted depending on the type of each of the normal piercing attribute, the normal beam-off attribute, the first piercing-on attribute, the first piercing-off attribute, and the beam-on attribute when the NC data is generated. Beam on / off code storage means for storing, normal piercing attribute, beam off attribute, pre-piercing on attribute, pre-piercing off attribute, beam coded NC code to be inserted according to each type of attribute And NC data generating means for generating NC data while switching between.

Further, among the cutting lines including the piercing wire in each part, the product line selecting means for distinguishing the piercing wire from the product line showing the shape of the product other than the piercing wire, and the product line selecting means, The distance from the position to which the piercing on attribute is added to the product line is calculated, and the piercing distance calculation means for obtaining the closest distance and the presence or absence of the product shape line within the preset distance set in advance are determined. And a piercing addition determining means for doing so.

Also, after inserting the post-piercing inserted code in advance, the post-piercing inserting code storage means, and when NC data is generated, after processing the pre-piercing off attribute portion, other than the next fast-forward through the fast-forward line. When the portion that generates the command for performing the above processing does not have the pre-piercing on attribute, the post-piercing post-insertion code insertion unit that inserts the pre-piercing post-insertion code before the command is provided.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Figure 1
Is a pre-piercing processing function according to the first embodiment of the present invention,
It is a block diagram which shows the structure of the case used as a CAD / CAM apparatus for laser processing machines. CAD / CA
The M device creates graphic data that defines the shape of the product based on the various input data, stores the various data input, and the CPU 1 that analyzes the cutting direction and cutting conditions to generate cutting information and the like. In addition, it is possible to draw the graphic data of a plurality of products formed on one plate material, and the memory 2 in which the necessary software as the piercing processing function is stored, and the cutting information and the display contents of the screen. A printer 3 such as a printer / plotter for printing, etc., and a plurality of products that display defined graphic data, cutting paths, cutting conditions, input request messages, etc. on the screen and form on one plate C which can draw all the figure data of
A display 4 such as an RT or a liquid crystal, a keyboard 5 as an input means for inputting various data such as shape data and cutting conditions, and a mouse 6 as a pointing device for selecting a figure or menu displayed on the display 4.
And an external storage device 7 such as a hard disk for storing the defined graphic data, all of which are connected by a bus 9. Further, a cutting device such as a laser beam machine used in the present embodiment may be connected to the bus 9 via a cable or the like.

FIG. 2 shows a processing flow of an embodiment of the present invention in the operation after the conventional processing for arranging the product figure as shown in FIG. The state after the placement processing of the product figure as shown in FIG. 7 is performed, or the state where the placement processing of the product figure is performed and the piercing line is added to the hole or outer periphery of each figure. In step S1, the operator selects a piercing line to which the previous piercing attribute is to be added. In step S2, the preceding piercing attribute adding means automatically adds the preceding piercing on attribute and the preceding piercing off attribute to the position where the beam on attribute of the piercing line is added.

The attributes such as "first piercing on" and "first piercing off" shown here are, for example, the solid line portion in FIG. 8 is the line that is actually cut and the broken line portion is the fast-forward line, but each numeral is added. Focusing on the piercing line part, the piercing line itself is a mere cutting line drawn with a solid line, and it shows that each attribute is added to the positions at both ends, that is, the attribute is a cutting line or Unlike the element that shows the actual shape or moving path such as the rapid feed line, it shows the property of the element added to the element at that position. For example, when the previous piercing on attribute is added to the start point of the solid line, the property of performing the first piercing at the start point position of the solid line is shown, and when the attribute position is processed in the later NC data generation processing, It is used as a guide for the process of inserting the NC code of the first piercing on. Therefore, for example, the upper side of the part A in FIG. 8 is a solid line for cutting, and shows a state in which no attribute is added. Further, for example, each fast-forward line has an attribute indicating fast-forward added to the entire fast-forward line. Attributes are not shown in the form of elements that are easy to recognize on the screen, such as solid lines and broken lines, and it is difficult to distinguish them.Therefore, it seems that attributes are added in the form of points distinguished by color on the screen. It is shown so that it can be easily recognized.

Next, the processing when these attributes are automatically added is shown. Only the solid line within the fixed range from the coordinate position of the mouse indicated by the operator and the beam-on attribute added, that is, the machining line Is searched for and recognized, the information of the end point coordinates of the solid line to which the beam-on attribute is added is recognized, and the first piercing on attribute and the first piercing off attribute are added to that position. Next, in step S3, the piercing attribute changing means automatically changes the piercing attribute on the piercing line selected in step S1 to the beam-on attribute after the first piercing. Here, the process when the attributes are automatically changed is also shown.Following the process of adding the first piercing-on attribute and the first piercing-off attribute, the piercing attribute originally located at that position is deleted and a different color is used. The distinguished beam-on attribute after the first piercing is changed to the same position. In step S4, every time the operation of adding the previous piercing attribute is performed with a mouse click, the operator determines whether or not all operations have been executed, and steps S1 to S3 are performed until all the piercing lines to be added are completely added. The operation is repeated. Then, in step S5, the destination piercing route setting means automatically sets the destination piercing route for all the destination piercing attributes, for example, the state shown in FIG. Here, showing the process when the previous piercing route is automatically set, the route left on the CAD screen is set starting from the processing start position as shown in the bottom left position of FIG. A computer processing is performed to search for all the preceding piercing attributes that are not present, and the machining path including the rapid feed line is sequentially set in order from the closest distance.

Thereafter, the conventional route setting means sets the normal cutting route for all the figures, and subsequently, the NC data generating process as shown in step S6 of FIG. 3 is performed. In this processing, means for storing various codes as shown in FIG. 3 in advance in the computer memory is prepared as software processing, and the normal piercing code and the normal piercing code are stored in the beam on / off code storage means. In addition to the beam-off code, it is assumed that the preceding piercing-on code, the preceding piercing-off code, and the beam-on code after the preceding piercing are set and stored.
The destination piercing-on attribute, the destination piercing-off attribute, the regular piercing attribute, the regular beam-off attribute, the beam-on attribute after the destination piercing, etc. which are added in the setting up to all the disconnection routes as shown in (b) , The added attributes are automatically judged sequentially and the NC data can be automatically generated.

The process for generating the NC data while following the order of the routes that have already been set is the same as the conventional one. However, in the conventional technique, when the NC data is executed based on the shape as shown in FIG. While the "fast forward line", "normal piercing attribute", and "normal beam-off attribute" are sequentially recognized, the "pre-piercing on attribute" and "pre-piercing attribute" are other than those in the process of the pre-piercing according to the present embodiment. "OFF attribute" is also recognized as a new type of attribute, and is generated by calling a code set from the beam on / off code storage means according to the type of each attribute.
The process of inserting into C data is performed.

According to the present embodiment, when the preceding piercing attribute is added, all the piercing attributes on the piercing line at that position are automatically changed to the beam-on attribute after the preceding piercing. It is possible to prevent the occurrence of processing defects, and avoid the problem of forgetting to set a path even in the operation of setting the processing path only for the first piercing attribute.

Embodiment 2. FIG. 4 is a diagram showing a configuration of a system including a product line selection means, a destination piercing distance calculation means, and a destination piercing addition determination means as the destination piercing attribute adding means in the destination piercing processing function of the second embodiment. Is. Here, the product line selection means refers to a means for distinguishing a piercing wire from a product line showing the shape of a product other than the piercing wire. As mentioned above, the piercing wire is a wire that is originally added to prevent piercing on the product cutting line.Since the piercing wire is not related to the finished product after cutting, for example, piercing is performed immediately next to the piercing wire, and then the scattered Since there is no problem even if there is an influence such as the material adhering to the piercing wire, it may be handled separately from the product line for which such an effect should be avoided, and such means should be provided. In addition, the tip piercing distance calculation means
Ignore the piercing wire that does not need to avoid the influence as described above,
Targeting only product lines that must avoid impact,
This is means for calculating the distance between the target beam-on attribute position at that time and the closest product line by processing on a computer. Further, the first pierce addition judging means compares the magnitude with a preset distance based on the result of the first pierce distance calculating means, and the comparison result is large with respect to the beam-on attribute of interest at that time. For example, it is a means for determining whether to add the front piercing, or to add the front piercing if the comparison result is small, or not to add the pre-set piercing. In the process of adding the pre-piercing attribute of step S1 and step S2 of FIG. 2 according to the first embodiment, the operation of step S1 in the step S1 of FIG. The product line selection means selectively recognizes and extracts only the product lines excluding the piercing lines on the screen, and the position of the beam-on attribute added to the tip of each piercing line on the figure, that is, the piercing on The piercing distance calculating means calculates the position to which the attribute is added and the distance from the position to the product line on the figure, and finds the distance from each point to the product line at the shortest distance.

Next, the preceding piercing addition judging means compares the judgment distance set and registered in advance with the shortest distance to the product line at each point, and as set by the operator in advance, A process such as automatically adding the first piercing attribute to all points at positions shorter than the determination distance or automatically adding the first piercing attribute to all points at positions longer than the determination distance is performed. The operation after adding the first piercing attribute is the same as in the first embodiment.

According to the present embodiment, the distance to the cutting line can be automatically determined, and the operation of adding the first piercing attribute only at a good distance can be executed. You can avoid making mistakes.

Embodiment 3. FIG. 5 is a means for storing various codes as shown in FIG. 5 in a computer memory as a software processing as a pre-piercing post-insertion code inserting means in the pre-piercing processing function of the third embodiment. It is a figure which shows the structure of the system provided with the insertion code storage means after the first piercing. In performing the NC data generation processing as shown in step S6 of FIG. 5, the post-piercing insertion code is stored in advance in the post-piercing insertion code storage means, and when the NC data is generated, the pre-piercing off attribute is set. In the part that generates the command to process other than the next rapid feed through the rapid feed line after processing the part, if it is not the first piercing on attribute, the processing of the first piercing ends there and the normal cutting process starts after that. Therefore, the inserted code after pre-piercing insertion means performs this judgment processing, and automatically inserts the inserted code after pre-piercing before the command.

According to the present embodiment, it is possible to avoid the problem of forgetting to insert the assist gas switching command after the end of the previous piercing process when generating NC data.

In each of the above-described embodiments, the case of using the laser processing machine has been mainly described, but in the case of implementing the present invention, a plurality of products such as a water jet and a plasma cutting machine are cut out. Processing data for scrap processing of processed plate material that has been cut, that is, C for generating NC data
It can be used for AM devices. Further, the automatic programming device for generating the processing data has been described, but when the present invention is carried out, it can be applied to a dedicated CAD or a CAD that can be operated by a commercially available personal computer OS. That is, CAD / CAM that can be operated with a dedicated machine and a commercially available personal computer OS
It can be used as a device, automatic programming device and software.

[0036]

In the CAD / CAM apparatus according to the present invention, when the first piercing attribute is added, all the piercing attributes on the piercing line at that position are automatically changed to the beam-on attribute after the first piercing. It is possible to prevent the occurrence of processing failure due to forgetting the operation, and avoid the problem of forgetting to set the path even in the operation of setting the processing path only for the first piercing attribute.

Further, the CAD / CAM apparatus according to the present invention can automatically judge the distance to the cutting line, and can add the piercing attribute first and add it only at a good distance. It is possible to avoid making mistakes due to incorrect judgment.

Furthermore, it is possible to avoid the problem of forgetting to insert the assist gas switching command after the end of the previous piercing process when the NC data is generated.

[Brief description of drawings]

FIG. 1 shows a CAD / laser for a laser processing machine according to the first embodiment.
It is a block diagram which shows the structure of the case used as a CAM apparatus.

FIG. 2 is a flowchart showing a process of the present embodiment after a process of arranging product figures is performed.

FIG. 3 is a flowchart showing a process of NC data generation according to the present embodiment.

FIG. 4 is a diagram showing a configuration of a system including a product line selection unit, a front piercing distance calculation unit, and a front piercing addition determination unit as the front piercing attribute adding unit.

FIG. 5 shows a method for inserting an inserted code after the first piercing.
It is a figure which shows the structure of the system provided with the insertion code storage means after the first piercing.

FIG. 6 is a diagram showing a conventional procedure for creating graphic data.

FIG. 7 is an explanatory diagram of a conventional product graphic arrangement example.

FIG. 8 is a diagram showing an example in which the cutting order is indicated by numbers.

FIG. 9 is a diagram showing an example in which the processing path order of only the first piercing operation is set first.

FIG. 10 is a diagram showing an example in which a route returning to a position where a normal disconnection operation is started after the previous piercing is completed is set.

FIG. 11 is a diagram showing a comparative example of NC data generated with and without pre-piercing.

[Explanation of symbols]

1 CPU, 2 memory, 3 printer, 4 display, 5 keyboard, 6 mouse, 7 external storage device, 9 bus.

Claims (4)

[Claims] 1. A CAD / CAM device for inputting graphic data defining the shape of each product as a part and generating NC data for cutting out the part from a plate material, in a cutting start position, piercing attribute, cutting path, etc. of each part. The storage means for presetting and storing the component placed data, the destination piercing designating means for designating the destination piercing position to collectively perform only the piercing operation in the component placed data, and the destination piercing designating means A destination piercing attribute adding means for adding a destination piercing attribute to the position; a piercing attribute changing means for changing the normal piercing attribute attached to the position designated by the destination piercing designating means to a beam-on attribute; Destination to set the disconnection route only to the position where the piercing attribute is added And Ass path setting means, the usual piercing attributes, based on the previously piercing attribute, and cutting path, characterized by comprising the NC data generation means for generating NC data, the CAD / CAM
apparatus. 2. A CAD / CAM device for inputting graphic data defining a shape of each product as a part and generating NC data for cutting out the part from a plate material, by setting a cutting start position of a hole or an outer periphery of each part. , A piercing line setting means for adding a piercing line with a normal piercing attribute, a cutting route setting means for setting a route for sequentially cutting a hole or an outer periphery of each of the above parts, and a piercing position first attribute for the piercing position of the piercing line. And a piercing-off attribute, and piercing-attribute changing means for changing the normal piercing attribute at the tip of the piercing line at the position where the above-mentioned piercing-on attribute is added to a beam-on attribute. A destination piercing route setting means for setting a disconnection route only at a position to which the destination piercing attribute is added. When generating the NC data, a normal piercing attributes,
Beam-on / off code storage means for storing in advance NC codes to be inserted according to the respective types of normal beam-off attribute, pre-piercing-on attribute, pre-piercing-off attribute, and beam-on attribute; NC to be inserted depending on the difference between the piercing attribute, the beam-off attribute, the first piercing-on attribute, the first piercing-off attribute, and the beam-on attribute.
CAD / C, which comprises NC data generating means for generating NC data while switching codes.
AM device. 3. A product line selecting means for distinguishing a piercing line from a cutting line including a piercing line in each part and a product line showing a shape of a product other than the piercing line, and the product line selecting means, A piercing distance calculation means that calculates the distance from the position where the piercing on attribute is added to the product line and finds the closest distance, and determines whether the product shape line is within the preset specified distance CAD / CA according to claim 1 or 2, further comprising:
M device. 4. A pre-piercing post-insertion code storage means for setting and storing the pre-piercing post-insertion code in advance, and a part other than the next fast-forward via the fast-forward line after processing the pre-piercing off attribute portion when generating NC data. If the part that generates the command to process is not the first piercing on attribute,
4. The CAD / CAM according to claim 1, further comprising: a pre-piercing post-insertion code inserting means for inserting the pre-piercing post-insertion code before the command.
apparatus.