JP2002108426A - Nc data generating method for three-dimensional work system and three-dimensional work system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify preparation work before work starts. SOLUTION: The three-dimensional shape of a work piece generated in a three-dimensional CAD device 4 is taken into a CAM device 5, and work route data on an outer line L necessary for cutting work is generated. In the CAM device 5, three points on the surface of the three-dimensional shape are set as reference points. The actual work piece 2 is loaded on a work table 6 and three points corresponding to the three set points are measured. The coordinates are inputted to the CAM device 5. In the CAM device 5, work route data is corrected so that the three points being the set reference points are matched with the three measured points of the work piece 2. Work route data is converted into NC data and an NC device 12 operates a work head 11 and the like based on NC data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for creating NC data in a three-dimensional machining system for machining a three-dimensional workpiece and a three-dimensional machining system.

[0002]

2. Description of the Related Art Conventionally, when processing a three-dimensional workpiece by a three-dimensional five-axis laser processing machine, a processing locus is taught to a processing head before starting the processing, and the taught data is added to the data. Therefore, a teaching method in which a processing head is moved to perform actual laser processing has been used.
In this method, a three-dimensional workpiece is fixed on a processing table of a laser processing machine before processing is started, and then the processing head is moved to each teaching point on a processing line of the workpiece using a teaching box. By
NC data is created by instructing the position of each teaching point and the machining attitude of the machining head and the interpolation between the teaching points. In such a conventional method of creating NC data by performing teaching, there is a disadvantage that it takes a long time since an operator moves and teaches the machining head.

[0003]

Therefore, in order to save the time and effort of such teaching, a machining operation in which the set position of the workpiece on the machining table is determined from the stage of creating the three-dimensional shape by the CAD device. Methods have also been proposed. However, in such a processing method, it is necessary to accurately position the workpiece to be actually processed on the processing table so as to coincide with the installation position of the workpiece on the drawing. Therefore, there is a disadvantage that it is necessary to manufacture a positioning jig with high accuracy, and further, it is necessary to accurately position a workpiece on a processing table using the jig. In the case where the mounting position of the workpiece on the processing table is shifted, the mounting operation has to be performed again.

[0004]

In view of the circumstances described above, a first aspect of the present invention is directed to a processing table on which a three-dimensional workpiece is placed, and a processing table which is movably provided. A processing head for performing required three-dimensional processing on the workpiece, a CAM device for generating NC data for controlling the operation of the processing head, and a processing head for the processing head based on the NC data generated by the CAM device. An NC device for controlling the operation, a shape relating to the workpiece is taken into the CAM device to generate machining path data of the machining head, a reference point is set on the surface of the shape, and then the machining table Measuring the position of a point corresponding to the set point on the surface of the actual workpiece placed on the CAM device, taking in the coordinate values of the position of the measured point into the CAM device, and setting the shape set previously NC data creation method in a three-dimensional machining system that corrects the processing path data so that the position of the point coincides with the position of the measured point, and further converts the corrected processing path data into the NC data. Is what you do. According to a second aspect of the present invention, there is provided a processing table on which a three-dimensional workpiece is placed, and a processing for performing a required three-dimensional processing on the workpiece movably provided on the processing table. A head, a CAM device for creating NC data for controlling the operation of the machining head, and an NC device for controlling the operation of the machining head based on the NC data created by the CAM device; When a shape related to a workpiece created by a three-dimensional CAD device is captured, machining path data of a machining head is generated, and a reference point is set on the surface of the shape related to the workpiece created by the three-dimensional CAD device. Further, when the position of a point corresponding to the set point on the actual surface of the workpiece placed on the processing table is measured and input to the CAM device, the CA The apparatus corrects the processing path data so that the position of the point on the shape set previously matches the position of the measured point, and converts the corrected processing path data into the NC data. A three-dimensional processing system is provided.

[0005] According to such a configuration, the work of setting the workpiece on the processing table simply requires placing the workpiece at a required position. Therefore, the preparation work before the start of machining can be simplified as compared with the related art.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiment. In FIG. 1, reference numeral 1 denotes a three-dimensional processing system for performing a required three-dimensional processing on a three-dimensional workpiece 2. This three-dimensional processing system 1 is a three-dimensional processing system
A CAM device 5 that takes in a three-dimensional shape of the workpiece 2 created by a five-dimensional 5-axis laser beam machine 3 and a conventionally known three-dimensional CAD device 4 and generates machining path data for the workpiece 2 based on the three-dimensional shape. It is composed of As will be described in detail later, the CAM device 5 has a simple CAD function, and can modify the shape created by the three-dimensional CAD device 4. 3D 5-axis laser beam machine 3
A processing table 6 on which the workpiece 2 is placed and movably provided in the X direction on the horizontal plane;
A movable casing 7 provided movably in a Y direction perpendicular to the direction, a laser oscillator 8 for oscillating a laser beam, and a workpiece mounted on a lower portion of the movable casing 7 so as to be vertically movable in a Z direction (vertical direction). 2 is provided with a processing head 11 for performing laser processing by irradiating a laser beam to the laser beam 2.

[0007] As shown in FIG.
The tilt angle can be changed by rotating the A-axis parallel to the direction in the opposite direction about the rotation center, and the rotation can be performed about the vertical C-axis parallel to the Z-axis.
At the lower end of the processing head 11, a conical nozzle 11A is attached. Since the processing head 11 having such a configuration is known, for example, from Japanese Patent Publication No. 3-55234, detailed description is omitted. Further, as shown in FIGS. 1 and 3, the three-dimensional five-axis laser beam machine 3
And measuring means 13. The NC device 12 controls the operation of the drive source for the processing table 6, the laser oscillator 8, the drive source for the movable casing 7, and the drive source for raising and lowering and swinging the processing head 11. As described above, by controlling the operations of the laser oscillator 8 and the respective driving sources by the NC device 12,
The three-dimensional workpiece 2 placed on the processing table 6 and the nozzle 11A of the processing head 11 are relatively moved, so that the three-dimensional workpiece 2 can be cut. Further, when the workpiece 2 is placed on the processing table 6, the measuring means 13 can measure coordinates in an XYZ direction at an arbitrary point on the surface relating to the workpiece 2. The configuration and operation of the above-described three-dimensional five-axis laser beam machine 2 are the same as those conventionally known.

In this embodiment, the use of the CAM device 5 makes it possible to simplify the preparation work before the start of machining as compared with the conventional case. The CAM device 5 of the present embodiment includes a shape capturing unit 5A, a processing path generating unit 5B, a display unit 5C, and a processing posture correcting unit 5D. The shape capturing means 5A is a three-dimensional CAD device 4
It is possible to take in the three-dimensional shape of the workpiece 2 created in the above. The shape of the workpiece 2 captured by the shape capturing unit 5A is transmitted to the processing path generating unit 5B and displayed by the display unit 5C. The processing path generating means 5B can generate processing path data corresponding to a cutting line when cutting the workpiece 2 based on the shape transmitted from the shape capturing means 5A. I have. The processing posture correcting means 5D can correct the processing path data generated by the processing path generating means 5B. The shape of the workpiece 2 is displayed on the display means 5C even when the correction is performed by the processing posture correcting means 5D.

Further, the CAM device 5 includes a positioning unit 5E, an NC data conversion unit 5F, and a reference point setting unit 5F.
G is provided. The reference point setting means 5G sets three required points in the shape captured by the shape capturing means 5A as reference points.
The coordinates of the point in the XYZ directions are transmitted to the positioning means 5E. The coordinates measured by the measuring means 13 of the three-dimensional five-axis laser beam machine 3 are input to the positioning means 5E. In the present embodiment, three points on the actual workpiece 2 corresponding to the three points set by the reference point setting means 5G of the CAM device 5 are measured by the measuring means 13 and input to the positioning means 5E. I am trying to do it. The positioning means 5E corrects the processing path data so that the three points set by the reference point setting means 5G coincide with the three points of the actual workpiece 2 measured by the measuring means, and converts it to the NC data conversion means 5F. To be communicated to.
The NC data conversion means 5F converts the final machining path data transmitted from the positioning means 5F into NC data,
The NC data is transmitted to the NC device 12 of the three-dimensional five-axis laser beam machine 3.

------ (Explanation of work process) The three-dimensional machining system 1 configured as described above
For example, as shown in the perspective views of FIGS. 4 and 5, a three-dimensional workpiece 2 that has been bent in advance is cut into a closed-loop outline L and a plurality of round holes M as shown in FIG. The case where the inner side 2a of the outer shape line L is a product will be described. In this case, first, a three-dimensional shape (2a shown in FIG. 4) as a product of the workpiece 2 is created by a conventionally known three-dimensional CAD apparatus 4 (S1 in FIG. 6). Next, the three-dimensional shape of the workpiece 2 created by the three-dimensional CAD device 4 is taken into the shape taking means 5A of the CAM device 5 (S2 in FIG. 6). Accordingly, the display means 5C of the CAM device 5
Displays the captured shape. Further, the processing path generating means 5B of the CAM device 5 selects each individual line constituting the outline L formed of the closed loop, and also selects the round hole M to specify all the processing lines to be cut. .

Further, thereafter, in the machining path generating means 5B of the CAM device 5, a machining start point is designated, a machining order of each of the outline L and the round hole M is designated, and each machining section of the machining head 11 is designated. The processing path data for moving the nozzle 11A of the processing head 11 is also generated by designating the relief amount in the movement between them (S3 in FIG. 6).
When generating the processing path data, the processing path data is generated on the assumption that the surface of the workpiece 2 is irradiated with a laser beam in a vertical direction. Next, the machining path generating means 5B
A simulation in the case where the processing head 11 (nozzle 11A) is moved by the generated processing path data is described as CA
This is performed on the display unit 5A of the M device 5 to confirm the posture of the processing head 11 when it is moved on the processing path (S4 in FIG. 6). At the time of this simulation, if there is a location on the machining path where the machining orientation of the machining head 11 is not appropriate, the machining orientation of the machining head 11 is adjusted by the machining orientation correcting means 5D so that the machining orientation of the machining head 11 is appropriate for the inappropriate location. Correct the machining posture of. For example, in FIG.
In the vicinity of a corner where the vertical plane indicated by the arrow A and the horizontal plane are connected by a gentle arc, the workpiece 2 and the processing head 11 interfere with each other. Therefore, the processing posture correcting means 5D corrects the processing posture of the processing head 11 to be appropriate so that the processing head 11 does not interfere with the workpiece 2 at such a point in the simulation. I have.

Next, on the display means 5C of the CAM device 5, the reference point setting means 5G sets three points P1, P2 and P3 on the surface of the displayed shape of the workpiece 2 as reference points (FIG. 4, S5 in FIG. 6). The three reference points P1, P2, and P3 are preferably set at positions as far apart from each other as possible. Each reference point P1, P2, P3 is
The coordinates are specified as coordinates in the XYZ directions. Next, the actual workpiece 2 before processing is placed at a required position on the processing table 6. In the present embodiment, as shown in FIG. 4, a jig 15 adapted to the shape of the workpiece 2 is used, and the workpiece 2 is engaged with the jig 15 from above without any gap. , Horizontal parts 15A on both sides of the jig 15
Is fixed by a clamp on the processing table 6 side. In this case, the jig 15 may be simply fixed at a required position on the processing table 6 by a clamp without particularly performing the orientation and positioning of the workpiece 2. Thereafter, the actual three points corresponding to the three reference points on the processing path data side of the workpiece 2 on the processing table 6 are set.
By marking the points in advance and moving the machining head 11 to the three points by teaching,
The coordinates in the XYZ directions are measured by the measuring means 13, and the measurement result is registered by the positioning means 5 E of the CAM device 5.
(S6 in FIG. 6).

Next, the positioning means 5E of the CAM device 5
In FIG. 7, the processing path data is moved and converted so that the positions of the three reference points (P1, P2, P3) on the surface of the processing shape set previously match the actually measured positions. 6 S7). That is, thereby, the machining path data of the workpiece 2 currently mounted on the machining table 6 is created. If necessary, a simulation may be performed again in the same manner as in the step S4. By doing so, it is possible to confirm again whether or not there is any part that will cause a processing omission or interference between the processing head 11 and the workpiece 2, and make necessary corrections to the processing path data. Next, when the positioning means 5E of the CAM device 5 transmits the processing path data of the workpiece 2 after the positioning as described above to the NC data converting means 5F, the NC data converting means 5F The data is converted into NC data for the NC device 12 of the three-dimensional five-axis laser beam machine 3 (S8 in FIG. 6). Thereafter, the NC data converted by the NC data conversion means 5F of the CAM device 5 is input to the NC device 12 of the three-dimensional five-axis laser beam machine 3 via a storage medium such as an FD (S in FIG. 6).
9). Next, based on the NC data input from the CAM device 5, the NC device 12 controls the operations of the laser oscillator 8, the processing head 11, and other driving sources, and the three-dimensional object placed on the processing table 6. The workpiece 2 is cut on the processing path (S10 in FIG. 6).

According to the present embodiment, when the workpiece 2 is set on the processing table 6 immediately before the start of the processing, the jig 15 with which the workpiece 2 is engaged is particularly positioned or adjusted. What is necessary is just to attach to a required position on the processing table 6 without worrying about the direction. Then, after that, three reference points of the workpiece 2 are measured, and they are input to the CAM device 5. Therefore, according to the present embodiment, the work of setting the workpiece 2 on the processing table 6 can be simplified as compared with the related art, and the preparation work before starting the processing can be simplified. In the above embodiment, three points on the shape of the workpiece 2 taken into the CAM device 5 are set as reference points. However, when the workpiece 2 is a rotating body, the reference point is 1 point.
You only need to set the location. In other words, when a square hole is made in a substantially hemispherical workpiece 2 as shown in FIG. 7, it is assumed that the workpiece 2 is positioned horizontally so that the top is upward. What is necessary is just to set the center O of the workpiece 2 as a reference point. In the above-described embodiment, the present invention is configured such that the shape created by the three-dimensional CAD apparatus 4 is taken into the CAM apparatus 5 and the above-described processing is performed without performing teaching before the processing is started. The teaching may be performed in the same manner as in the related art, the teaching data obtained at that time may be taken into the CAM device 5, and the above-described processing may be performed. In the above embodiment, the workpiece 2 is placed on the processing table 6 via the jig 15, but the jig 15 is not always necessary, and the workpiece 2 is stably placed on the processing table 6. The jig 15 can be omitted if the mounting can be performed. Further, the above embodiment is directed to a three-dimensional five-axis laser beam machine 3
Although the case where the present invention is applied to the three-dimensional processing system 1 has been described, the present invention can also be applied to a case where three-dimensional processing is performed on the workpiece 2 by other cutting means such as water jet cutting.

[0015]

As described above, according to the present invention, an effect is obtained that the preparation work before the start of machining can be simplified as compared with the related art.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is an enlarged view of a main part shown in FIG.

FIG. 3 is a configuration diagram of a CAM device and its related parts.

FIG. 4 is a perspective view of a workpiece 2;

FIG. 5 is a perspective view of a workpiece 2 and a jig 15;

FIG. 6 is a view showing an operation process by the three-dimensional processing system 1 shown in FIG.

FIG. 7 is a perspective view showing the shape of a workpiece 2;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... 3D processing system 2 ... Workpiece 3 ... 3D 5 axis laser processing machine 4 ... 3D C
AD device 5 CAM device 8 Laser oscillator 11 Processing head 12 NC device

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) // B23K 26/00 B23K 26/00 M

Claims (6)

[Claims] 1. A processing table on which a three-dimensional workpiece is placed, a processing head movably provided for performing required three-dimensional processing on the workpiece on the processing table, and an operation of the processing head. CA that creates NC data for control
M device, and an NC device that controls the operation of the processing head based on the NC data created by the CAM device, generates the processing path data of the processing head by taking the shape of the workpiece into the CAM device, A reference point is set on the surface of the shape, and then the position of a point corresponding to the set point on the surface of the actual workpiece placed on the processing table is measured. The coordinate value of the position is taken into the CAM device, and the processing path data is corrected so that the position of the previously set point on the shape coincides with the position of the measured point. An NC data creation method in a three-dimensional machining system, wherein path data is converted into the NC data. 2. The method according to claim 1, wherein the reference points are three points. 3. The three-dimensional machining system according to claim 1, wherein the CAM device creates NC data based on a shape of the workpiece created by the three-dimensional CAD device. How to create NC data. 4. The CAM device comprises a display means, which captures the shape of the workpiece created by the CAD device and displays the shape on the display means, and a processing head formed by the CAM device on the display means. 4. The NC data creating method according to claim 3, wherein the processing posture of the processing head is corrected by performing a simulation of moving on the path. 5. A processing table on which a three-dimensional workpiece is placed, a processing head movably provided for performing required three-dimensional processing on the workpiece on the processing table, and an operation of the processing head. CA that creates NC data for control
M device, and an NC device that controls the operation of the processing head based on the NC data created by the CAM device. The CAM device processes when a shape related to a workpiece created by a three-dimensional CAD device is captured. The processing path data of the head is generated, a reference point is set on the surface of the shape related to the workpiece created by the three-dimensional CAD apparatus, and the point on the surface of the actual workpiece placed on the processing table is set. When the position of the point corresponding to the set point is measured and input to the CAM device, the CAM device
Correct the machining path data so that the position of the point on the shape set earlier matches the position of the measured point,
A three-dimensional machining system for converting the modified machining path data into the NC data. 6. The three-dimensional processing system according to claim 5, wherein the reference points are three points.