JPH06297295A - Working order deciding method in cutting work data - Google Patents

Abstract

PURPOSE:To decide the most suitable working order automatically by extracting adjacent working ranges from a data base and making them into a block and taking a range data out of them in the order of the height of working level. CONSTITUTION:A working order deciding unit 4 takes range data, in the order of the height of working level, out of decides range group of working subject in block data 3 and closed working order, produces data of the working order in this figure and outputs them, after deciding development range by in account taking the continuity in connection between height and wall. Concerning connecting condition of wall to an adjacent range, a working range is decided by adding an adjacent range thereto when tangent line for both walls is continuous and after-work must be employed when they are not continuous. An order control table 6 controls processing state of each range data when the working order is decided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention develops data of a plurality of processing regions set with arbitrary contour shapes and heights to determine a processing order for performing cutting processing. Regarding the scheme.

[0002]

2. Description of the Related Art Conventionally, when an NC machine is used to perform cutting processing with an arbitrary contour shape and height (depth), the processing is rough grinding, intermediate grinding, finishing, finishing, surface finishing. The machining is performed in the order of machining, and in each machining, the machining order is determined for each of the plurality of machining areas, the tool is selected, and the NC data is created. In the creation of such NC data, the processing order is such that a person judges based on the contour shape and cutting depth of the final product to be processed, the adjacency of each processing area, etc., and inputs the information to the system through interactive processing. It was a common technique. Therefore, N
The basic part of the creation of C data relies solely on the experience and subjectivity of the person who makes the judgment, and for example, it was not the case that automatic determination processing was performed so as to obtain the optimum processing order.

[0003]

Conventionally, in order to determine an optimum machining order for actually creating NC data as described above, it is necessary to have know-how of machining technology and to have some knowledge of machining. Had to be someone who was.
Therefore, even if the conventional system is provided with an NC data creation program, it is necessary for an expert to make an empirical decision after grasping the entire processing, and not everyone can use it. There was a problem that it did not exist.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a machining order determination system for cutting machining data which can automatically determine an optimum machining order. .

[0005]

To this end, the present invention provides cutting data for expanding the data of a plurality of processing areas set with arbitrary contour shapes and heights to determine a processing order for performing cutting. The processing order determination method of (1), which is a database including area data having line segment information and processing height information forming a contour shape for each processing area, and adjacent processing areas are extracted from the database and made into blocks. Block data extracting means and region data are taken out in the order of increasing working height from the extracted block data, and a region where the wall connection state is continuous in adjacent regions having a working height or less is added. It is characterized in that the processing order determining means for determining the processing order according to the development area is provided, and the processing order tree diagram data is created in the descending order of the processing height.

[0006]

In the method for determining the machining order of the cutting data according to the present invention, a database consisting of region data having line segment information and machining height information forming the contour shape for each machining region, and machining adjacent to the database. Block data extraction means for extracting a region and making it into a block, and region data is extracted from the extracted block data in descending order of machining height, and a wall connection state is established in an adjacent region having a height equal to or less than the machining height. Since it is provided with a processing order determination means for determining a processing order by a development area including a continuous area,
Block data is extracted from the database and adjacent regions with a height below the machining height and regions with a continuous wall connection state are added in order from the highest machining height, and the machining area is simplified to create a machining order tree diagram data. Can be created.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram for explaining an embodiment of a machining order determination method for cutting machining data according to the present invention, FIG. 2 is a diagram for explaining a configuration example of block data, and FIG. 3 is a machining region to be block data. It is a figure for explaining.

In FIG. 1, the graphic database 1 includes element information such as line segments that are divided into straight lines and curved lines representing the contour shape of each closed region (processing region), its current height information, and finished height. It has information and the like. The block data extraction unit 2 extracts adjacent processing target closed region groups from the graphic database 1 as block data, and the block data storage unit 3 stores the extracted block data. The block data, for example, as shown in FIG. 3, is composed of processing object closed area groups A, B, C, and F, G, and H that are separated and adjacent to each other in a height Z0 area that is not the processing object area. , For example in FIG.
As shown in FIG. 4, the list 11 of area data names A, B, C, D, ... Comprising the processing target closed area group and the respective area data 12 are included.
Each of B, C, D, ... Has a pointer to the address of the area data 12. The area data 12 includes at least the current height information Zs1, the finished height information Ze1, and a line segment that is divided into straight lines and curves representing the contour shape for each area data.
It has element information consisting of line-01, 02, 03, .... If this element information is, for example, a straight line, start point s01, end point
e01, s02, e02, s03, e03, etc., and information such as a starting point and a linear equation and a length, and a curve, a radius and a starting point, an end point, and a center.

The machining order determination unit 4 takes out the region data from the group of closed regions to be machined in the block data 3 in the order of high machining height (shallow depth) and considers the continuity of height and wall connection. Then, after determining the development area, the processing order is determined, and the tree diagram data 5 of the processing order is created and output. This basic idea is that machining is performed in the order of increasing height of the processing area, and if there is an area of low height adjacent to the processing area, check the connection state of the wall with the adjacent area and add to the processing area. What is included is processed, and what is not is processed afterwards. If there is an open surface and it is not open, post-processing is performed. Regarding the connection state of walls with adjacent regions, if the tangents between the walls are continuous, the adjacent regions are added to determine the processing region, and if they are not continuous, post-processing is performed. The order management table 6 manages the processing state of each area data when determining the processing order.

Next, a concrete example of determining the machining order will be described. FIG. 4 is a diagram for explaining the tangent continuity of the wall,
FIG. 6 is a diagram for explaining an open surface, FIG. 6 is a diagram showing an example of a machining diagram and its machining order tree diagram data, and FIG. 7 is a diagram for explaining an example of a ranking management table.

In the present invention, the continuity of wall connection means that when adjacent regions are connected by walls, the inclination of the tangent line at the end point of the edge data (straight line or arc) of the shared wall is calculated, and the inclination is If they are the same, they are regarded as continuous. For example, when the arc of edge 2 is in contact with the straight line of edge 1 at one point as shown in FIG. 4 (a), or the arc of edge 1 and the arc of edge 2 are in contact at one point as shown in (b). When the straight line of the edge 1 and the straight line of the edge 2 have the same straight line equation as shown in (c), it is considered that the connection state of the wall with the adjacent region is continuous.

Further, the open surface means a place where a part of the edge forming the processing area is open, and as shown in FIG. 5, it indicates an edge of a part which does not eventually become a wall in the final finished shape. . In other words, when cutting, it is the edge that the tool may approach. That the open surface is not open (not open) means that the tool cannot approach the open surface. For example, as shown in FIG. 5C, in the processing area 23, it is the open surface 25 that does not become a wall in the final finished shape, but when cutting this area, the cutting of the processing area 24 is completed first. If not, the tool cannot approach from the open surface 25 of the processing area 23. Therefore, if the cutting of the processing area 24 is not completed, the open surface 25 is not opened, and the opening surface 25 is opened by the completion of the cutting of the processing area 24. In the case of pocketing all the walls as shown in FIG. 5D, the tool is approached from the top, and therefore, if the cutting of the region including the pocket region is completed, it is treated as open.

In FIG. 6 (A), A, B, C and D are
Each is a processing area, and the range indicated by the contour line is the depth Z
0, Z3, ... Indicates cutting. Therefore, in terms of height, Z0 is the highest region where no cutting is performed, and Z15 is the lowest region. When a figure database is created based on this processed drawing, for example, for the area data A, a contour line consisting of straight lines at the top, bottom, left, and right and contour lines consisting of arcs at the upper and left corners are element information, Z0 is the current height, and Z3 is the current height. Is registered as the finishing height.

The processing order in the processing drawing is determined as follows. First, when the processing area A of the highest Z3 is taken out, the adjacent processing area C and the wall are tangential discontinuities, so the processing area A is post-processed, and the processing area B of the next height Z5 is the same. Since it exists, it will be post-processed. Further, the processing area C of the next height Z10 includes the processing area D which is lower than Z15 and the walls are not adjacent to each other. Therefore, the processing order is 1 in the area including the processing area D of Z15 at the height of Z10.
Determine as rank. Next, the processing area D of Z15 is determined as the second processing order because there is no processing area lower than that. Then, returning to the post-machining machining area A of Z3, the machining area C of the adjacent height Z10 has already been developed and there is no adjacent area outside, so it is decided as the machining rank of second place,
Similarly, the processing area B of Z5 is also determined as the second processing priority. As a result, FIG. 6B shows an example of the created processing order tree diagram data.

In the management table 6, as shown in FIG. 7, for example, a ranking determination flag and a post-processing flag are set in each area data as management information for ranking determination, and the order determination area data and the post-processing area are set. It makes it possible to identify the data. That is, first, all the management information of each area data is set to "0", the highest processing area is taken out, each area data is determined, and the determination processing of the first processing order is performed, and the processing order is set to 1 The order determination flag of the management information of the rank area data C is set to "1", and the post-processing flag of the management information of the area data A and B to be post-processed is set to "1". Similarly, the processing area having the next highest height (sequentially lower) is taken out, the processing order of the processing order is the second rank is determined, and the corresponding order determination flag and post-processing flag are controlled. When there is no lower processing area, the area data A and B having the post-processing flag "1" are sequentially taken out and the same determination processing is performed. When all the rank determination flags become "1", the determination process ends. The management table 6 may read the list 11 and set a flag.

FIG. 8 shows the flow of the processing order determination processing by the processing order determination method of the cutting processing data according to the present invention as described above. First, a region having the highest height is extracted from the undeveloped cutting closed region data (step S1), and it is checked whether or not the undeveloped cutting region exists (step S2).
If there is no undeveloped cutting area, the process ends, but if it exists (YES), it is further checked whether or not there is another processing area that is included in the developed area or is adjacent to it and whose height is equal or low (step S3). ). When the corresponding processing area exists (YES), it is further checked whether the tangent line is continuous in the state where the wall is connected to the adjacent area or whether the walls are not adjacent to each other (step S4). As a result, if the tangent lines are continuous or are not adjacent to each other (YES),
After adding the processing region to form a development region, the process returns to step S3 and repeats the process (step S5). When the tangents are not continuous and the walls are adjacent to each other (NO), the development height region is determined. After the post-processing, the process returns to step S1 to repeat the process (step S7). If there is no corresponding processing area in step S3 (NO), it is further checked whether the open surface of the development area is open (step S6). As a result, if it is opened (YE
S), determine the machining in the development area (step S8),
If not opened (NO), the developed height region is post-processed, and then the process returns to step S1 to repeat the process (step S7).

FIG. 9 is a diagram for explaining the flow of the overall processing order determination processing. When the graphic database is created from the processed drawing, the block data is first read from the graphic database (step S11). Next, it is checked whether or not there is an unexpanded block (step S12), and if there is an unexpanded block, processing order tree diagram data for each of the rough grinding processing area, medium grinding processing area, and finishing processing area is created. Yes (steps S13 to S15). Then, each area in the block data and the tool for each process are selected (step S1).
6) Return to step S11 and repeat the same processing until there are no unexpanded blocks.

When there are no undeveloped blocks (NO), the finishing surface machining data is input from the figure database to select the finishing surface machining tool (steps S17 to S18), and then chamfering edge data is obtained from the figure database. Input and select a chamfering tool (steps S19 to S20).

And, maintaining the processing order in each process,
The machining order is determined in the order in which the tool exchange is minimum and the cutting area is closer to the machining origin (step S21), and the machining order data is output to the machining order file (step S22).

The cutting order determination method for cutting processing data according to the present invention is to create processing order tree diagram data for each of the rough cutting processing area, the intermediate grinding processing area, and the finishing processing area in the above processing. is there. The present invention is not limited to the above embodiment, and various modifications can be made.

FIG. 10 is a diagram for explaining the relationship between the machining area and the cutting efficiency. In the example of FIG. 6 described above,
According to the processing order determination method according to the present invention, the first processing order is the processing area C + D shown in FIG. 10A, but if the processing order is simply determined in descending order, FIG.
It looks like (c). First, if the processing is developed with the highest Z3, the lower processing Z5, Z10, and Z15 can also be processed at the same time. Therefore, as shown in FIG.
The area includes B, C, and D. Similarly, the second height Z
When the processing is expanded in 5, the lower Z10 and Z15 are also processed simultaneously, so that the area becomes as shown in FIG. However, since the tool used in the machining area A of Z3 is a tool having a diameter smaller than the limited shape, machining a machining area C + D having a large area with the tool results in a longer cutting path,
Further, since the number of cuts increases, the processing time becomes long and the cutting efficiency becomes poor.

[0022]

As is apparent from the above description, according to the present invention, the operator does not have the processing technology know-how, and the processing order is not determined by a person's judgment, and all the programs are automatically determined. Even if there is, it is possible to determine the optimum processing order. Therefore, anyone can create NC data.

Generally, as the shape of the cutting region becomes more complicated, the diameter of the tool used becomes smaller, so that the cutting path becomes longer and the cutting efficiency is lowered. Since the cutting area is determined by the continuity of the tangent line by paying attention to the wall connection state at a processing height equal to or lower than the height, the shape of the cutting area can be summarized into a simple shape that is easy to machine. Therefore, the calculation of the cutting path is facilitated and the cutting efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a diagram for explaining one embodiment of a machining order determination system for cutting machining data according to the present invention.

FIG. 2 is a diagram for explaining a configuration example of a graphic database.

FIG. 3 is a diagram for explaining a processing area that becomes block data.

FIG. 4 is a diagram for explaining tangential continuity of a wall.

FIG. 5 is a diagram for explaining an open surface.

FIG. 6 is a diagram showing an example of a processed drawing and its processing order tree diagram data.

FIG. 7 is a diagram illustrating an example of a ranking management table.

FIG. 8 is a diagram for explaining the flow of processing order determination processing by the processing order determination method for cutting processing data according to the present invention.

FIG. 9 is a diagram for explaining the flow of overall processing order determination processing.

FIG. 10 is a diagram for explaining a relationship between a processing area and cutting efficiency.

[Explanation of symbols]

1 ... Graphic database, 2 ... Block data extraction unit, 3
... Block data storage unit, 4 ... Processing order determination unit, 5 ... Tree diagram data storage unit, 6 ... Order management table

Claims (3)

[Claims] 1. A machining order determination method for cutting processing data, wherein data of a plurality of processing areas set with arbitrary contour shapes and heights is expanded to determine a processing order for performing cutting processing. A database composed of region data having line segment information and machining height information forming the contour shape for each machining region, block data extracting means for extracting adjacent machining regions from the database and forming blocks, and the extracted blocks Processing that extracts the area data from the data in the order of the processing height and determines the processing order by the expansion area including the area where the wall connection state is continuous in the adjacent area of the processing height or less A processing order determination method for cutting processing data, characterized by comprising a processing order determination means and creating processing order tree diagram data in order of increasing processing height. 2. The processing of the cutting processing data according to claim 1, wherein the processing order determining means performs post-processing on a processing area in which an open surface of which a part of an edge is open in an adjacent area and which is not open is post-processing. Ranking method. 3. The cutting method according to claim 1, wherein the processing order determination means adds a region where the tangents are continuous or the walls are not adjacent to each other in the connected state of the wall to the adjacent region to the development region. A method for determining the processing order of processing data.