JP3110971B2 - Automatic programming device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic programming device for creating a machining reference line sequentially offset from an input reference line and creating NC data for area machining along the created machining reference line.

[0002]

2. Description of the Related Art Conventionally, as a method for processing an input reference line, a first processing reference line, a second processing reference line,...
No. 1 machining reference line is sequentially created, and based on the machining start point and machining direction and the created machining reference line, the first machining reference line, the second machining reference line,. A locus is formed along the machining reference line in the order of the n-th machining reference line (or the n-th machining reference line,..., The second machining reference line, the first machining reference line), and the created locus is defined as the machining locus. (Hereinafter, this processing locus is referred to as a spiral processing locus). The spiral machining is used for pocket machining for performing machining within a machining reference line on a plane having a certain height as shown in FIG. 9 or by sequentially reducing the height as shown in FIG. It is used in contour line processing for processing within a line.

By the way, the shape of the processing reference line created by offsetting the reference line DB inward by the designated offset amount is the first processing reference line DL1 and the second processing reference line DL2 in FIG. In general, the shape is similar to that of the 12th machining reference line DL1 and the 2nd machining reference line DL2, which is offset by the offset amount, but like the 3rd machining reference line DL3 of FIG. In some cases, the shapes may be dissimilar shapes separated by more than the offset amount, or the shape may be dissimilar because the processing reference line is divided like the third processing reference line DL31 and the third processing reference line DL32 in FIG. When a processing locus is created from a processing reference line having such a dissimilar shape, the movement locus from the processing reference line to the next processing reference line greatly differs depending on the position of the processing start point on each processing reference line. The first processing start point on the first processing reference line is given by the operator's input, but the processing start points after the second processing reference line are uniquely determined by finding the point closest to the previous processing start point. It is determined by For example, FIG.
(B) shows a case where the processing locus is created by sequentially adopting the outer processing reference line from the inner processing reference line and the processing direction is clockwise. In FIG. 11A, the distance from the first processing start point PS1 to the processing start point PS2 is very short, and the movement trajectory from the processing start point PS1 to the processing start point PS2 is within the reference line DB indicating the processing area. Therefore, the processing path from the processing start point PS1 to the processing start point PS2 can be linearly moved by the cutting feed. Similarly, the processing path from the processing start point PS2 to the processing start point PS3 can be linearly moved by the cutting feed. It is. However, as shown in FIG.
In FIG. 11B in which only the position of No. 1 is changed, the processing trajectory from the processing start point PS1 to the processing start point PS2 can be linearly moved by the cutting feed, but from the processing start point PS2 to the processing start point PS3. When the processing locus has a long distance and moves linearly, it passes outside the first processing reference line DL1 and interferes with the processing shape. In order to avoid the interference, it is necessary to insert a retreat trajectory indicated by a dashed line between the processing start point PS2 and the processing start point PS3. Note that the dotted line indicates a processing locus by cutting feed.

FIG. 12 also shows a case where a processing locus is created by sequentially adopting an outer processing reference line from an inner processing reference line and a processing direction is clockwise. In FIG. 12, the second processing reference line DL
The third machining reference lines created by offsetting 2 inward by the designated offset amount become the third machining reference lines DL31 and DL32 divided by interference (hereinafter, referred to as the third machining reference lines DL31 and DL32).
The divided processing reference line is referred to as a divided processing reference line.) In this case, as shown in FIG. 12, the processing locus which moves from the division processing reference line DL31 to the other division processing reference line DL32 passes outside the No. 1 processing reference line DL1 and interferes with the processing shape when it moves linearly. In order to avoid the interference, an evacuation locus indicated by a dashed line is necessary. In addition, in the same manner, a retreat locus indicated by a dashed line is necessary between the machining locus moving to the next inner fourth machining reference line DL4 to avoid interference with the machining shape. You will fly here.

FIG. 13 is a block diagram showing a conventional automatic programming device for creating the above-mentioned spiral machining trajectory. Reference line data DB is input from the reference line input unit 1,
The offset amount OA is input from the offset amount input unit 2, and the input reference line data DB and offset amount OA
, A machining reference line DO offset by the reference line offset processing unit 5 is created, a machining start point PS is input from the machining start point input unit 3, and a machining direction input unit 4 is input.
, The machining direction DD is input from the
A processing locus DT is generated by the processing locus generating unit 14 based on S, the processing direction DD, and the generated processing reference line DO, and the generated processing locus DT is output to the NC data conversion unit to generate an NC program. It has become.

[0006]

However, when machining is performed on the spiral machining trajectory created by the conventional automatic programming device, as shown in FIGS. When the movement to the line interferes with the machining shape, an evacuation locus indicated by a dotted line is required in order to avoid the interference. The processing when approaching on the retreat trajectory is processing based on the blade bottom of the tool, which is not preferable in processing. Further, when the distance of the retreat trajectory is long or when the number of retreat trajectories increases as shown in FIG. 12, the processing efficiency is reduced.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object of the present invention is to prepare a machining reference line sequentially offset from an input reference line and to process the machining reference line from this reference line. In the case of creating a trajectory, if the processing start point is separated from the second processing reference line by a distance equal to or greater than the determination value, a second processing reference line is set from the middle of the first processing reference line serving as the reference of the current processing trajectory. Create a single-stroke machining locus that moves on to the first machining locus, or use the first machining locus as a reference for the current machining locus when the second machining reference line is a plurality of divided machining reference lines.
By automatically creating a single-stroke machining locus that sequentially transitions to a second machining reference line that is divided from the middle of the machining reference line, it is possible to easily create a machining locus connected by a single stroke without intervening evacuation operations. It is to provide a programming device.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, an automatic programming apparatus according to the present invention is provided for processing along a plurality of processing reference lines which are sequentially offset from an input reference line. In the automatic programming device for creating the area machining NC data, a first machining reference line and a second machining standard adjacent to the first machining reference line created by offsetting the first machining reference line by a specified amount Processing reference line extracting means for extracting a line, and separation determination for determining whether or not the processing start point on the first processing reference line is separated from a second processing reference line by a separation determination value or more. Means, a processing start point on a first processing reference line, and a second
Change point for determining a change point on the first processing reference line at which the first processing reference line and the second processing reference line start to separate by the offset amount or more when the processing reference line is separated by the separation determination value or more. Calculating means, transfer start point detecting means for obtaining any one of the change points as a transfer start point of a processing locus for transferring to a second processing reference line, and a second transfer destination from the transfer start point to a transfer destination A transfer end point detecting means for obtaining a transfer end point on the processing reference line;
A first processing reference line, the transfer start point, the transfer end point, a second processing reference line from the processing start point on the processing reference line, and a processing path returning to the processing start point through the transfer start point again. A one-stroke processing locus creating means to be created,
It is characterized by having.

Further, the transfer start point detecting means obtains a distance from the processing start point to the change point along a processing direction on a first processing reference line, and determines a change point having the longest distance to the transfer start point. And the transfer end point detecting means detects a point on a second processing reference line closest to the transfer start point as the transfer end point.

In the case where the second machining reference line exists as a plurality of divided machining reference lines, a division machining reference for obtaining the processing order of the plurality of divided machining reference lines of the second machining reference line. Line processing order determining means, and division processing reference line extracting means for extracting a part of the first processing reference line and one of the second division processing reference lines in accordance with the obtained processing order. I do.

The dividing line transfer start point detecting means determines a dividing line transfer start point for all divided processing reference lines obtained by dividing the second processing reference line, and the division processing reference line processing order determining means determines Calculating the distances from the machining start point to all the dividing line transition start points along the machining direction on the first machining reference line, finding the order of the dividing line transition start points having the shorter distances, It is characterized in that the order of the division processing reference line is obtained as the processing order from the order of the transfer start point.

[0012]

According to the present invention, when the machining start point on the first machining reference line is separated from the second machining reference line by a distance equal to or greater than the judgment value, the first machining reference line and the second machining reference line are separated. And a change point on the first processing reference line at which the change point starts to exceed the offset amount, and a distance from the processing start point to the change point along the processing direction on the first processing reference line is determined. Detected as a transfer start point, a point closest to the transfer start point on the second processing reference line is determined as a transfer end point, and a first processing reference line and the transfer start point and the transfer end point from the processing start point; A one-stroke machining locus that returns to the machining start point through the second machining reference line and the transfer start point again can be created.

Further, according to the present invention, when the second processing reference line is a plurality of divided processing reference lines, all the divided processing reference lines of the second processing reference line are transferred to the dividing line. A start point is obtained, a distance from the processing start point to all the dividing line transfer start points along the processing direction on the first processing reference line is obtained, and the order of the split line transfer start point having the shorter calculated distance is obtained. The order of the division processing reference line is determined as the processing order in accordance with the order of the divided line transfer start points, and a part of the first processing reference line and the second division processing reference line that are the processing target range are determined in accordance with the determined processing order. A point and a transfer start point are extracted, and a part of the processing reference line, the divided processing reference line, the processing start point, and the transfer start point, which are the extracted processing target data, are extracted from the processing start point to the first processing reference line and the transfer start point. It is possible to create a one-stroke machining locus that sequentially passes through the first machining reference line through the transition start point, the transition end point, the first division machining reference line, and again the transition start point to the next division machining reference line. .

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the automatic programming device according to the present invention will be described below.

FIGS. 1 and 2 are block diagrams showing an example of the automatic programming apparatus according to the present invention in correspondence with FIG. 13, in which the same elements are denoted by the same reference numerals and description thereof will be omitted. In the present embodiment shown in FIG. 1, a first processing reference line and a second processing reference line adjacent to the first processing reference line created by offsetting the first processing reference line by a specified amount are extracted. Processing line extracting unit 7 as processing line extracting means
A separation determination unit 8 as a separation determination unit that determines whether or not the processing start point on the first processing reference line is separated from the second processing reference line by a separation determination value or more; If the processing start point on the first processing reference line and the second processing reference line are separated by the separation determination value or more, the first
A change point calculating section 9 as a change point calculating means for obtaining a change point on the first processing reference line at which the first processing reference line and the second processing reference line start to separate from each other by an offset amount or more; A transfer start point detecting unit 10 as a transfer start point detecting means for obtaining one as a transfer start point of a processing locus for transferring to the second processing reference line, and a second processing reference line which is a transfer destination from the transfer start point A transfer end point detection unit 11 as a transfer end point detecting means for obtaining a transfer end point; a processing start point on the first processing reference line to a first processing reference line; the transfer start point; the transfer end point; And a single-stroke machining locus creating unit 6 as a single-stroke machining locus creating means for creating a machining locus returning to the machining start point through the machining reference line and the transfer start point again.

Based on the reference line data DB input from the reference line input unit 1 and the offset amount OA input from the offset amount input unit 2, a processing reference line DO offset by the reference line offset processing unit 5 is created. You. The created processing reference line DO and the one-stroke processing locus up to the immediately preceding processing reference line (for example, the first processing reference line if the processing target is the second processing reference line) created by the one-stroke processing locus creating unit 6 D
The second processing reference line adjacent to the first processing reference line in the processing reference line extracting unit 7 based on T
Is extracted as The determination unit 8 determines whether or not the extracted processing target data DL and the processing start point PS input from the processing start point input unit 3 are separated from the second processing reference line DO by the determination unit 8. Based on the determination result DR, the change point calculation unit 9 obtains a change point DC at which the first processing reference line starts to be separated from the second processing reference line by an offset amount or more. The transfer start point ST is obtained by the transfer start point detection unit 10 based on the obtained change point DC, and the transfer end point ED is obtained by the transfer end point detection unit 11 based on the obtained transfer start point ST. The single-stroke machining locus DT is created in the single-stroke machining locus creating unit 6 based on the obtained transfer end point ED, and the created single-stroke machining locus DT is output to the NC data conversion unit.

FIG. 2 is a schematic diagram of the device shown in FIG.
FIG. 4 is a block diagram showing a configuration that can process even a plurality of divided processing reference lines. In FIG. 2, a division processing reference line processing order determination unit 12 as a division processing reference line processing order determination unit that determines the processing order of a plurality of divided processing reference lines obtained by dividing the second processing reference line, FIG. 1 includes a division processing reference line extracting unit 13 as division processing reference line extracting means for extracting a part of the first processing reference line and one of the second division processing reference lines in order. Is different. Based on the single-stroke processing locus DT created by the single-stroke processing locus creating unit 6 and the processing reference line DO created by the reference line offset processing unit 5, the division processing reference line processing order determination unit 12 determines The processing order DJ is determined, and the divided processing reference line extracting unit 13 determines the processing order D of the determined divided processing reference line.
From J, a part of the first processing reference line and one of the second divided processing reference lines, the processing start point and the transfer start point are extracted as the processing target data DS.

In such a configuration, the operation of this embodiment will be described with reference to the flowcharts of FIGS. 3 to 6 and the explanatory diagrams of FIGS. 7 and 8. First, the operation in the present embodiment when there is no second processing reference line will be described with reference to FIG. The processing described below includes a processing reference line extraction unit 7, a separation determination unit 8, a change point calculation unit 9, a transfer start point detection unit 1
0, which is performed in the transfer end point detecting unit 11 and the one-stroke processing trajectory creating unit 6, but there is already a method of creating a processing reference line offset inward based on the reference line, performed by the reference line offset processing unit 5. The description is omitted in the embodiment.

First, it is determined whether there is a processing reference line to be processed (step 1). First, the first processing reference line is the processing reference line DL1, and the second processing reference line is the processing reference line D.
L2. In FIG. 7, since there is at least the processing reference line DL1, it is determined whether the second processing reference line DL2 is a plurality of divided processing reference lines (step 2). In FIG. 7, since the second processing reference line DL2 is not a division processing reference line, the first processing reference line DL1 and the second processing reference line DL2 are extracted (step 3), and the processing start point PS1 and the second processing reference line DL2 are extracted. It is determined whether the distance obtained by calculating the distance of the reference line DL2 is larger than the distance determination value (step 4). In FIG. 7, the separation distance between the processing start point PS1 and the second processing reference line DL2 is smaller than the separation determination value (offset amount × about twice in this embodiment), so the next processing, that is, processing on the processing reference line DL2 is performed. A point PS2 closest to the processing start point PS1 is obtained as a start point (step 5). After making one round in the machining direction (clockwise in FIG. 7) from the machining start point PS1 along the first machining reference line DL1, a machining locus to the next machining start point PS2 is obtained (step 6). Here, it is determined whether there is another processing reference line inside the second processing reference line DL2 (step 7). In FIG. 7, since at least DL3 is inside the processing reference line DL2 as a processing reference line, The numbers of the first processing reference line and the second processing reference line to be processed are updated (step 8). That is, the first processing reference line is changed to the processing reference line DL.
2, and the second processing reference line as the processing reference line DL3
Return to step 1 again.

It is determined whether there is a processing reference line to be processed in the same manner as described above (step 1). In FIG. 7, since there is at least DL2 as the processing reference line, the processing reference line DL
It is determined whether 3 is a plurality of divided processing reference lines (step 2).
In FIG. 7, since the processing reference line DL3 is not a divided processing reference line, the first processing reference line DL2 and the second processing reference line DL3
Is extracted (step 3), the separation distance between the processing start point PS2 and the processing reference line DL3 is obtained, and it is determined whether the obtained separation distance is larger than the separation determination value (step 4). In FIG. 7, since the separation distance between the processing start point PS2 and the second processing reference line DL3 is larger than the separation determination value, the processing reference line DL3 is separated from the first processing reference line DL2 by an offset amount or more on the processing reference line DL3. Start change points DC1, DC2, DC
3, DC4, DC5, DC6, DC7 and DC8 are obtained (step 9). From the processing start point PS2 on the first processing reference line DL2 along the processing direction, the above-mentioned calculated change points DC
Each distance from 1 to DC8 is obtained, and a change point having the maximum length among the obtained distances is obtained as a transfer start point DST2 (step 10). In FIG. 7, the second processing reference line DL3
The point closest to the transfer start point DST2 above is determined as the transfer end point DED3 (step 11), and the trajectory from the processing start point PS2 to the transfer start point DST2 along the first processing reference line DL2 along the processing direction and the start of the transfer are determined. A locus from the point DST2 to the transfer end point DED3 is obtained (step 12). Here, the second processing reference line DL3
It is determined whether or not there is still a machining reference line inside (step 13). In FIG. 7, since at least DL4 exists as a machining reference line inside machining reference line DL3, the transfer end point DE
Replace D3 with the next machining start point PS3 (Step 1)
4), the numbers of the first processing reference line and the second processing reference line to be processed in the same manner as in step 8 are updated (step 1).
5). That is, the first processing reference line is set to the processing reference line DL3,
Further, the process returns to step 1 again with the second processing reference line as the processing reference line DL4.

In the same manner as described above, it is determined whether there is a machining reference line to be processed (step 1). In FIG. 7, since at least the machining reference line is DL3, the second machining reference line DL4 is divided into a plurality of divided machining lines. It is determined whether the line is a reference line (step 2). In FIG. 7, since the processing reference line DL4 is not a divided processing reference line, the first processing reference line DL3 and the second processing reference line DL4 are extracted (step 3), and the separation distance between the processing start point PS3 and the processing reference line DL4. Is determined, and it is determined whether the determined separation distance is larger than the separation determination value (step 4). In FIG. 7, since the distance between the processing start point PS3 and the second processing reference line DL4 is smaller than the separation determination value, a point PS4 on the processing reference line DL4 closest to the processing start point PS3 is determined as the next processing start point. (Step 5). Processing start point PS3
Then, after making one round in the processing direction (clockwise in FIG. 7) along the first processing reference line DL3, a processing locus to the next processing start point PS4 is obtained (step 6). Second processing reference line DL
It is determined whether there is still a machining reference line inside the machining reference line 4 (step 7). However, in FIG. 7, since there is no machining reference line inside the machining reference line DL4, a machining trajectory that goes around the second machining reference line DL4 is determined. (Step 17).

Here, it is determined whether the vehicle has passed the transfer start point (step 18). In FIG. 7, the transfer start point D
Since the vehicle has passed through ST2, a processing locus from PS4, which is the current point, to the transfer start point DST2 via the processing start point PS3 is determined (step 19), and the transfer start point D is obtained.
Processing start point P from ST2 along the rest of processing reference line DL2
A processing locus up to S2 is obtained (step 20), and the process returns to step 1. It is determined whether there is a processing reference line to be processed (step 1). In FIG. 7, the processing ends because there is no next processing reference line.

Next, the operation when the processing reference line DL is a plurality of divided processing reference lines will be described with reference to the flowcharts of FIGS. 3 to 6 and the explanatory diagram of FIG. A processing reference line extraction unit 7, a separation determination unit 8, a change point calculation unit 9, a transfer start point detection unit 10, a transfer end point detection unit 11, a division processing reference line processing order determination unit 12, a division processing reference line extraction unit 13, The following processing is performed in the single-stroke processing locus creating unit 6. In the present embodiment, the divided processing lines DL3 (DL31, DL31
Reference numeral 32) denotes a division processing reference line that appears first in the processing, and the processing up to that is the same as that described above, and a description thereof will be omitted. The first processing reference line at this time is the processing reference line DL
2. The second processing reference line is the processing reference line DL3. Further, the processing trajectories up to the processing start point PS1, the point PS2, and the point PS2 are obtained.

First, it is determined whether there is a processing reference line to be processed (step 1). Since at least DL2 is a processing reference line in FIG. 8, it is determined whether the processing reference line DL3 is a plurality of divided processing reference lines (step 1). 2). In FIG. 8, the second
The processing reference line DL3 is a divided processing reference line composed of DL31 and DL32. Next, it is determined whether or not the processing is the first processing of the divided processing reference line (step 21). However, since the processing on the divided processing reference line has not been performed yet, the processing is the first processing. Processing start point PS21 and divided processing reference line DL3
1 and the separation distance between the processing start point PS21 and the division processing reference line DL32, and the division processing reference line whose calculated separation distance is larger than the separation determination value is obtained (step 2).
2). In FIG. 8, the processing start point PS21 and the division processing reference line D
The separation distance of L31 is smaller than the separation determination value, and the separation distance between the processing start point PS21 and the division processing reference line DL32 is larger than the separation determination value. Therefore, the separation processing reference line DL32 is larger than the determination separation determination value. . Change points DC1, DC2, DC3, DC at which the second divided machining reference line DL32 starts to be separated from the first machining reference line DL2 by an offset amount or more in the obtained second divided machining reference line DL32.
4. DC5, DC6, DC7 and DC8 are obtained (step 23). First machining reference line D from machining start point PS21
L2 along the processing direction, and each of the obtained change points DC1 to DC1
Each distance to DC8 is obtained, and a change point having the maximum length among the obtained distances is obtained as a dividing line transfer start point DST22 (step 24). If there are a plurality of division processing reference lines larger than the determination separation determination value, each distance from the processing start point PS21 on the processing reference line DL2 to each of the obtained division line transition start points in the processing direction is obtained. The dividing line transfer start point is obtained in ascending order of the distance, and the processing order of the division processing reference line is obtained from the obtained order of the dividing line transfer start point (step 25). In FIG. 8, since the division processing reference line to be processed is only DL32, the division processing reference line DL
32, and finally the division processing reference line DL31. Next, according to the processing order of the obtained division processing reference line, the first
A part of the processing reference line and one of the second divided processing reference lines and the processing start point and the transfer start point are extracted as processing target data. That is, the first DL32 in the processing order is extracted as the division processing reference line, and the processing start point is set to PS
21 is extracted and DST22 is extracted as the transfer start point, and the processing start point PS21 is used as a part of the first processing reference line.
Start point DS along the first processing reference line DL2
Extract up to T22 (step 26). The point closest to the transfer start point DST22 on the division processing reference line DL32 is determined as the transfer end point DED32 (step 1).
1) First machining reference line DL2 from machining start point PS21
The path along the processing direction up to the transfer start point DST22 and the transfer start point DST22 to the transfer end point D
A locus up to the ED 32 is obtained (step 12). next,
It is determined whether there is still a machining reference line inside the division machining reference line DL32 (step 13), and in FIG.
Since there is no machining reference line inside L32, the transfer end point D
From the ED 32, a processing locus that makes one round in the processing direction along the division processing reference line DL32 is obtained (step 16), a processing locus from the transfer end point DED32 to the transfer start point DST22 is obtained (step 19), and the transfer start point DST
First machining reference line D extracted from step 22 to step 26
A processing locus is obtained for the remaining portion of the part of L2 that is not used as the processing locus (step 20). FIG.
Then, there is no remaining unused portion, and no processing locus is obtained, and the process returns to step 1 again.

Next, it is determined whether or not there is a processing reference line to be processed (step 1). In FIG. 8, since there is at least a division processing reference line DL31, the second processing reference line DL31 is a plurality of division processing reference lines. (Step 2).
In FIG. 8, since the processing reference line DL31 is a division processing reference line, it is determined whether or not the processing is the first processing of the division processing reference line (step 21). The processing has already been performed on the division processing reference line DL32. Since the division processing reference line DL31 is not the first processing of the division processing reference line, it is determined whether or not the processing of all the division processing reference lines has been completed (step 27). Next, a part of the first processing reference line, one of the second processing reference lines, a processing start point, and a transfer start point are extracted as processing target data in accordance with the processing order of the obtained divided processing reference lines. In other words, the last DL31 in the processing order is extracted as the division processing reference line, PS22 is extracted as the processing start point, DST21 is extracted as the transfer start point, and a part of the first processing reference line is extracted from the processing start point PS22. 1 processing reference line D
Along the line L2, up to the transfer start point DST21 is extracted (step 26). The point closest to the transfer start point DST21 on the division processing reference line DL31 is the transfer end point DE.
D31 (step 11), the processing start point PS2
2 to the transfer start point DST21 along the processing direction along the first processing reference line DL2 and the transfer start point D
A trajectory from ST21 to the transfer end point DED31 is obtained (step 12). Here, the division processing reference line DL3
It is determined whether there is a machining reference line inside of Step 1 (Step 1).
3). In FIG. 8, since there is at least DL4, the transfer end point DED31 is replaced with the next machining start point PS31 (step 14), and the first machining reference line to be processed and the second machining reference line are processed.
Is updated (step 15). That is, the first processing reference line is set as the processing reference line DL3, and the second processing reference line is set as the processing reference line DL4.
Return to

It is determined whether there is a processing reference line to be processed (step 1). In FIG. 8, since there is at least the processing reference line DL31, it is next determined whether the second processing reference line DL4 is a plurality of divided processing reference lines. (Step 2). In FIG. 8, since the second processing reference line DL4 is not a division processing reference line, the division processing reference line DL31 is extracted as the first processing reference line, and the DL4 is extracted as the second processing reference line (step 3).
The distance between the processing start point PS31 and the second processing reference line DL4 is determined, and it is determined whether the determined distance is greater than the distance determination value (step 4). In FIG. 8, since the distance between the processing start point PS31 and the second processing reference line DL4 is smaller than the separation determination value, the processing start point PS31 is set as the next processing start point.
A point PS4 on the processing reference line DL4 closest to the first reference line D4 is obtained (step 5).
After making one round in the machining direction (clockwise in FIG. 8) along L31, a machining locus to the next machining start point PS4 is obtained (step 6). It is determined whether there is still a machining reference line inside the second machining reference line DL4 (step 7). However, in FIG. 8, since there is no machining reference line inside the machining reference line DL4, the second
A processing locus that makes one round of the processing reference line DL4 is obtained (step 17).

Here, if it is determined whether the vehicle has passed the transfer start point (step 18), the process returns to step 1 again since the vehicle has not passed the transfer start point in FIG. It is determined whether there is a processing reference line to be processed (step 1),
In FIG. 8, the process is terminated because there is no next processing reference line.

[0028]

According to the automatic programming device of the present invention, when a machining reference line is sequentially offset from an input reference line and a spiral machining locus is created from the obtained machining reference line, the machining start point is When it is separated from the second processing reference line by a distance equal to or more than the determination value, it is possible to create a single-stroke processing locus that transitions from the middle of the first processing reference line to the second processing reference line.

In the case where the machining reference line is a plurality of divided machining reference lines, a single-stroke machining locus is formed which sequentially transitions from the middle of the first machining reference line to the second divided machining reference line. It becomes possible.

By machining with these single-stroke machining trajectories, there is no leaning operation from above the tool, and machining is not performed at the tool bottom. Further, there is no waste in the movement operation from the processing reference line to the processing reference line, and the processing efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of an automatic programming device according to the present invention.

FIG. 2 is a block diagram illustrating an embodiment of the automatic programming apparatus according to the present invention, which can process divided machining reference lines.

FIG. 3 is a flowchart illustrating a single-stroke processing locus creation method according to the present embodiment.

FIG. 4 is a flowchart illustrating a one-stroke processing locus creation method according to the present embodiment.

FIG. 5 is a flowchart illustrating a one-stroke machining locus creation method according to the present embodiment.

FIG. 6 is a flowchart illustrating a one-stroke processing locus creation method according to the present embodiment.

FIG. 7 is a diagram for explaining the operation of the one-stroke machining locus creating method in the embodiment.

FIG. 8 is a diagram for explaining the operation of the single-stroke machining locus creating method in the embodiment.

FIG. 9 is a diagram showing an example of pocket machining using spiral machining.

FIG. 10 is a diagram showing an example of contour processing using spiral processing.

FIGS. 11A and 11B are diagrams illustrating an example of a machining path of conventional spiral machining.

FIG. 12 is a diagram showing an example of a processing locus of conventional spiral processing.

FIG. 13 is a block diagram showing a conventional automatic programming device for creating a machining path of spiral machining.

[Explanation of symbols]

1 reference line input section, 2 offset amount input section, 3 processing start point input section, 4 processing direction input section, 5 reference line offset processing section, 6 single stroke processing locus creation section, 7 processing reference line extraction section, 8 separation determination section , 9 Change point calculation unit, 10 Transfer start point detection unit, 11 Transfer end point detection unit, 1
2 division processing reference line processing order determination unit, 13 division processing reference line extraction unit.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-93707 (JP, A) JP-A-1-166104 (JP, A) JP-A-3-25508 (JP, A) JP-A-5-205 289723 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G05B 19/4093 B23Q 15/00

Claims (4)

(57) [Claims] 1. An automatic programming device for creating NC data for area machining for machining along a plurality of machining reference lines created sequentially offset from an input reference line, comprising: a first machining reference line; Processing reference line extracting means for extracting a second processing reference line adjacent to the first processing reference line created by offsetting the first processing reference line by a specified amount; a processing start point on the first processing reference line Determination means for determining whether or not the distance is greater than or equal to a separation determination value for determining the degree of separation between the second processing reference line and a processing start point on the first processing reference line; A change point calculating means for calculating a change point on the first processing reference line at which the first processing reference line and the second processing reference line start to separate by an offset amount or more when the distance is equal to or more than the separation determination value; From the changing point A transfer start point detecting means for obtaining one of them as a transfer start point of a processing locus for transferring to a second processing reference line; and a transfer end for obtaining a transfer end point on a second processing reference line to be a transfer destination from the transfer start point. A point detection means, a machining start point on the first machining reference line, a first machining reference line, the transfer start point, the transfer end point, a second machining reference line, and the machining start point again. An automatic programming device, comprising: a single-stroke machining locus creating means for creating a machining locus returning to a starting point. 2. The automatic programming device according to claim 1, wherein the transfer start point detecting means obtains a distance from the processing start point to the change point along a processing direction on a first processing reference line. A change point which is a distance is detected as the transfer start point, and the transfer end point detection means detects a point on a second processing reference line closest to the transfer start point as the transfer end point. Automatic programming device. 3. The automatic programming device according to claim 1, wherein, when the second machining reference line is present as a plurality of divided machining reference lines, the plurality of divided machining reference lines are divided. Division processing reference line processing order determining means for obtaining a processing order of the division processing reference line; a part of the first processing reference line and a second processing reference line in accordance with the obtained processing order
And a division processing reference line extracting means for extracting one of the division processing reference lines. 4. The automatic programming device according to claim 3, wherein the dividing line transition start point detecting means obtains a dividing line transition start point for all divided division processing reference lines of the second processing reference line. The division processing reference line processing order determination means obtains a distance from the processing start point to all the division line transition start points along the first processing reference line in the processing direction, and starts the division line transition of a short distance obtained. An automatic programming device, wherein the order of points is determined, and the order of the division processing reference line is determined as the processing order from the order of the determined division line transfer start point.