JPH0385607A - Working locus display device - Google Patents

Abstract

PURPOSE:To display collectively both a nose R corrected tool working locus and a nose R uncorrected tool working locus by displaying an actual tool working locus by generating it on the basis of the intersecting point of two straight lines connecting continuous two points of movement command values and the points of contact between these straight lines and the nose R circle of a tool. CONSTITUTION:A locus display data generating part 3 obtains straight lines L1 and L2 in contact with the nose R circle corresponding to a virtual tool edge passing through points P1, P2 and the points P3, P6 on the basis of the movement command values P1, P3, P6, P8 and tool shape data 7, and generates the display line data of the straight line P0P2 passing through the point P0 of contact between the nose R circle at the point P1 and the straight line L1 and the intersecting point P2 between the straight line L1 and the straight line L2. Thus, since both the nose R uncorrected actual tool working locus P0P2P5P9 and the nose R corrected tool working locus P1P3P6P8 can be dis played collectively and can be compared with each other, a working mistake or a programming mistake are removed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a machining trajectory display device that displays a tool machining trajectory by inputting a numerical control (hereinafter referred to as NG) program.

(Prior Art) Conventional machining trajectory display devices display the movement trajectory i of the virtual cutting edge of the tool, which is the movement command value of the nib program, or when the nose radius shape of the tool cutting edge is large, the operator If a nose R correction command has been given to the NC program in advance, the tool machining locus that has been corrected for the nose R will be displayed.

(Problem to be Solved by the Invention) The movement command values of the NC program manually input to the conventional machining trajectory display device described above are shown in FIG.
6 P8. If the nose R correction command is not given to the NC program even though the tool cutting edge used at this time has a nose R shape, the machining trajectory display will be displayed with l'l, which is the movement trajectory of the virtual cutting edge of the tool. , I'3. Pfi
, Pa will be displayed. However, because of the tool tip or nose R shape, it is actually 2 lj
, l machining trajectory is PI, P2. P5. There is a line connecting Pa, and the machining trajectory display device shows the shape of the machined workpiece i.
E It was not displayed accurately. In addition, when the above nose R correction command is commanded to the NC program, the command value PI,
P3. Whether machining is performed according to P[i, Pa, PI, P4. P7. Since only the line connecting Pa is displayed, there is a drawback that this tool machining trajectory cannot be compared with a tool machining trajectory that has not been subjected to nose radius correction.

The present invention was made in view of the above-mentioned circumstances, and an object of the present invention is to accurately display the actual tool machining trajectory when nose radius correction is not commanded, and to
When nose R correction is commanded, a pressure trajectory display device is provided which can display both the tool machining trajectory to which the nose R correction has been applied and the tool machining paper 11 beats 1 to which the nose R correction has not been performed. It is about providing.

(Means for Confronting Issues) The present invention is N
Machining trajectory display that displays “l'Jh !l1jli”I
Regarding ME, the main feature of the present invention is an analysis means that performs an IQA analysis of the NC program described in Section 2, obtains and stores three consecutive points among the movement command values, and a Creating and displaying an actual tool machining trajectory based on the intersection of two straight lines or circular arcs connecting two consecutive points and the point of contact between the straight line or circular arc and the tool nose RP'l. This is achieved by providing a display means.

(Function) The machining trajectory display device of the present invention displays the actual tool machining trajectory using the movement command of the NC program and the nose R circle of the tool when nose R correction is not instructed. When a command is given, the tool machining locus that has been subjected to nose R correction and the tool machining locus that has not been subjected to nose R correction are displayed together using the nose R compensation command.

(Example) FIG. 1 is a block diagram showing an example of the pressure locus display device of the present invention, in which an NC program 5 for a lathe is read into the NC program reading section 1 and the NG program angle q analysis section is read every block. 2, and NC Coco ~ Judgment data 6 (
Kakuzeo kataka is now being held. This analysis result is input to the trajectory display data creation section 3, and the nose R
Display line data is created from the tool shape data 7 including circular data and the above analysis results, and is displayed on the tool machining trajectory on the trajectory display section 4.

In such a configuration, an example of its operation will be explained with reference to the flowchart of FIG. The NG program analysis unit 2 manually selects block No. 1 of the NC program containing the nose R correction command as shown in FIG. 3 (step S1).
, the NC coat determination data 6 is used to check whether the block No. 1 is a movement command or not (step 52). Since block No. 1 is not a movement command but a tool command, the process advances to step 514 to check whether block No. 1 is the final block.

Since block No. 1 does not have the final blower, the process returns to step Sl to manually input the next block No. 2, and confirm whether or not the block No. 2 has an 8-move command (step 52). Since block No. 2 is a movement command, it is confirmed whether the movement point P1 is the first point or not (step S3). Since the moving point I'l is the first point, the moving point PI is stored as the point A in step S4) and step 5.
It is checked whether block No. 2 is the final block or not. Since block No. 2 is not the final block, the process returns to step S1 and the next block No. 3 is processed.
is input, and it is confirmed whether the block No. 3 is a movement command or not (step S2). Block No. 3 is a movement command, so check whether it is the movement point P3 or the first point.Step S3), movement point 1)3 is not the first point, but is between the second points. In step S5), the moving point P3 is between the second points, so the moving point P3 is stored as point B. In step S5), the process proceeds to step 514, and it is determined whether the block No. 3 is the final block or not. 4'/Cu. Since the last blower for block No. 3 has not yet been installed, the process returns to step 51 to manually input the next block no. 1, and confirm whether or not the block no. Block No. 4 is a movement command, so
Check whether the moving point P6 is between the first points (step S3), check whether the moving point P6 is not between the first points but the second iris (step S5), the moving point P6
Since there is no second iris, the moving point P6 is stored as a 0 point (step 57) 6 Then, the locus display data creation unit 3 moves 1l (1111 '3), and find the straight line Ll that is tangent to the nose R circle corresponding to the virtual cutting edge passing through '3), and the straight line BC (
Find the straight line 1QL2 that is in contact with the nose R circle corresponding to the virtual cutting edge that passes through P3P6), and find the point of contact PO between the nose R circle and straight line Ll at point (PI), and the intersection P2 between straight line Ll and straight lines 1 and 2. Create display line data for the straight line POP2 passing through (step S8), and display the straight line POP2 as a tool machining locus without nose radius correction (step 59).

Step 510) Check whether the nose R somale is applied to point B (P3), and if the nose R ore is applied to point n (P3), display the line data of l1 (PIP3) to the straight line. (Step 5ll), straight line 1
``lP3 is displayed as a tool machining locus with a nose radius corrected (step 512).Then, the data P1 at point A is updated to 1)3, and the data P3 at point B is updated.
1) is updated to 6 (step 513). Block No. 4] ° & Check whether there is a final block (Step 14), Block No. 4 is the final block and is 77
Then, the process returns to step S1 to manually input the next block No. 5, and confirm whether or not the block No. 5 is a movement command (step S2). Block No. 5 is a movement command, so check whether the movement point P8 is between the first points or not (step S3), and the movement point P8 is 1 between the first points (in the second Step S5)
Since the moving point P8 may be the second iris, the moving point P8 is stored as a 0 point (step S7). Then go straight 〇
(P3P6) and the straight line 142 that is tangent to the nose R circle corresponding to the virtual cutting edge, and the straight line 11e (1'fi
Find a straight line 143 that is in contact with the nose R circle corresponding to the virtual cutting edge passing through P8), and go to the point P2 between the nose R circle and straight lines 1 and 2 at (P3), and the intersection P between straight line L2 and straight line L3.
Create display line data for straight line P2P5 passing through 5 (step S8), and display straight line P2P5 as a tool machining locus without nose radius correction (step S9)
. Nose R at point [1 (P6)? Check whether +li is positive or not. Step 510), point 1l (Pri)
Since the Ninose R sleeve is fixed, go straight 〇 (P3
P6) Display line data creation step 5ll)
, straight line 1'3P6 is displayed as a tool machining locus subjected to nose radius correction (step 512). Then, data P3 at point A is updated to P6, and data P6 at point B is updated to P8 (step 513). Block No. 5
Step 514), block No. 5 is not the final block, so return to step Sl, manually input the next block No. 6, and manually input the next block No. 6. It is confirmed whether or not is a movement command (step S2). Block No. 6 has no movement command and is the final block, so it moves straight to B (PGF
2), find the straight line L3 that touches the nose R circle corresponding to the virtual cutting edge, and find the intersection P5 of the straight line L2 and the straight line 1.3, and the point B.
Point of contact P9 between the nose R circle and straight lines 1 and 3 in (P8)
Create display line data for straight line +15119 passing through (step 515), and display straight line P5P9 as a tool machining trajectory without nose radius correction (step S
I[i). Check whether the nose R correction is applied to the point (Pli-) (Step 517), and to the point (P6)
Since the nose R correction is applied to the straight line B (PBr
Step 518) to create the display line data of 3).
The straight line p6pa is displayed as a tool machining trajectory subjected to nose radius correction (step 519), and all processing is completed.

Through the above processing, the tool machining trajectory POP2P5P9 and the nose R? The tool machining trajectory PIP3P6P8 that has undergone ili correction will also be displayed.

In addition, in the above-described embodiment, the explanation is given for the case where the nose R correction is commanded, or the actual tool machining trajectory POP21'5P9 is displayed when the nose R correction is not commanded.

(Effect of the invention) According to the machining trajectory display device of the present invention, when no nose R correction is commanded, the shape of the machined workpiece can be recognized as 'iE[, If you specify positive, you can compare the tool machining trajectory with the best nose radius correction and the tool machining trajectory with the nose radius correction, eliminating machining errors and programming mistakes, and improving machining accuracy. It is possible to improve efficiency.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an example of the machining trajectory display device of the present invention, and FIG. 2 is a flowchart 1 to explain an example of its operation.
, FIG. 3 is a diagram showing an example of an NG program, and FIG. 4 is a diagram showing an example of a tool machining trajectory. 1... NC program drag-in section, 2... NC program analysis section, 3... Trajectory display data creation section, 4... Trajectory display section, 5... NG program for lathe, 6... N [+ Nifu 1~゛Kawasadata, 7...Tool shape data.

Claims (1)

[Scope of Claims] 1. In a machining trajectory display device that inputs a numerical control program and displays a tool machining trajectory, an analysis that analyzes the numerical control program, obtains and stores three consecutive points among the movement command values. An actual tool machining trajectory is created based on the means, the intersection of two straight lines or circular arcs connecting two consecutive points out of the three determined points, and the point of contact between the straight line and the nose radius circle of the tool. A machining trajectory display device comprising a creation display means for displaying. 2. The display means displays the intersection point of two straight lines or circular arcs connecting two consecutive points out of the three determined points, the contact point between the straight line or circular arc and the nose radius circle of the tool, and the nose radius correction command. 2. The machining trajectory display device according to claim 1, wherein a tool machining trajectory without nose radius correction and a tool machining trajectory with nose radius correction are created and displayed based on the above.