JP2642167B2 - How to create numerical control data - Google Patents

Description

The present invention relates to a method for creating numerical control (hereinafter, referred to as NC) data for die machining.

(Prior art) As a method of creating NC data in die machining,
There are a method of creating a model based on the drawing and a method of creating a prototype model and confirming the shape before creating the model.

FIG. 5 is a flow chart for explaining a conventional method of preparing a prototype model and confirming the shape thereof, and then preparing NC data for mold processing. Create full range NC data for
S1 to S3). A prototype model is created using a machining center, etc., based on the created whole area NC data (Steps S4, S
Five). The shape of the produced prototype model is checked to determine whether or not there is a modified portion (step S6). If there is no modified portion, all the processing is terminated. If there is a modified portion, the prototype model is modified (step S7). , S8). Then, the corrected prototype model is scanned with a digitizing device to create new whole-area NC data (steps S9 and S10). Based on the newly created whole-area NC data, a new prototype model is created using a machining center or the like. Fabrication (Steps S4, S5). Thereafter, the above-described processing is repeated until there are no more modified portions in the prototype model.

(Problems to be Solved by the Invention) Modifications of prototype models include those based on design changes and those based on visual images of designers. Of these, corrections made by the designer's visual image are often sensory that cannot be properly indicated on the drawing, and may affect the value of the product but greatly affect the function of the product itself. Is less. Therefore, it is a waste of time to perform scanning over the entire prototype model corrected every time such visual image correction is performed, and to generate new full-range NC data.

The present invention has been made under the circumstances described above,
An object of the present invention is to quickly modify a prototype model even if it occurs.
An object of the present invention is to provide an NC data creation method capable of creating NC data.

(Means for Solving the Problems) The present invention relates to a method for creating NC data for die machining, and an object of the present invention is to create full-range numerical control data based on drawings and perform the entire-range numerical control. When a corrected part occurs in the prototype model manufactured based on the data, by scanning only the corrected part of the corrected prototype model, partial numerical control data of only the corrected part is created, and the whole-area numerical control is performed. The whole area numerical control data of the non-corrected part is created by deleting a part corresponding to the corrected part of the data, and the whole numerical control data and the partial numerical control data of the non-corrected part are drawn, and the partial numerical value is drawn. The process of moving and combining the control data for each line such that the corresponding end point overlaps with the position of the end point of the whole-area numerical control data of the non-correction unit is repeated for all the lines, Combined with the entire numerical control data Tadashibu is accomplished by creating a whole numerical control data for the prototype model subjected to the modification.

(Operation) The NC data creation method of the present invention makes full use of the entire NC data initially created even if the prototype model is modified, and graphically displays the connection between the entire NC data and the partial NC data of the non-corrected portion. Since it can be easily checked on the above, the time for creating NC data can be greatly reduced.

(Embodiment) FIG. 1 is a block diagram showing an example of an NC data creating apparatus for realizing the NC data creating method of the present invention, and its configuration and operation will be described with reference to the flowchart of FIG.

The information of the drawing is input to the NC data creating unit 1 to create the whole area NC data (step S11), and based on the whole area NC data, a prototype model as shown in FIG. 3, for example, is made at the machining center. When a correction is made to the prototype model (step S12), the correction part (for example, B shown in FIG. 3)
) Is scanned by the digitizing device to create partial NC data (step S13). Then, the scanning range of the corrected portion is input to the designated area extracting section 2 as area graphic data, and a portion corresponding to the area graphic data in the entire area NC data input from the NC data creating section 1 is deleted and is not corrected. The whole area NC data of the section (for example, section A in the third illustration) is created. The range of deletion of the corresponding part is specified by, for example, drawing the partial NC data created by scanning the corrected part on the graphic display. The outermost point of the partial NC data is hit to create a polygon, which is used as area graphic data (step S14).

On the other hand, the partial NC data is input to the digitizing data offset unit 3 and is re-created as offset partial NC data according to the whole area NC data according to conditions such as a stylus, a tool diameter, a machining direction, and a pick width (step S15). One line of the entire area NC data and the offset part NC data of the non-corrected portion is drawn on the CRT via the trajectory drawing unit 4, for example, as shown in FIG. 4A (step S16). Further, the whole area NC data and the offset part NC data of the non-corrected part are input to the trajectory combining part 5, and the end point of the offset part NC data becomes the end point of the whole area NC data of the non-corrected part as shown in FIG. Transferred and combined. Further, as shown in FIG. 4 (C), the other end point of the offset part NC data is moved to the other end point of the whole area NC data of the non-corrected part and combined therewith, and the new NC data creation part 1 is obtained as new whole area NC data. (Steps S17, S18). Then, the above-described processing is repeated for all the lines (step S19), and all the processing ends.

(Effects of the Invention) As described above, according to the NC data generating method of the present invention, even if a correction part occurs in the prototype model, it is not necessary to re-generate the entire area NC data as in the conventional case. Can significantly improve the production efficiency, and the number of man-hours in the post-processing, which is a post-process, can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an example of an NC data creating apparatus for realizing the NC data creating method of the present invention, FIG. 2 is a flowchart illustrating an operation example thereof, FIG. 3 is a perspective view showing an example of a prototype model, FIG. 4 is a diagram for explaining an NC data creation method according to the present invention, and FIG. 5 is a flowchart for explaining a conventional NC data creation method. 1 NC data creation section 2 Specified area cutout section 3…
Digitized data offset part, 4 ... trajectory drawing part, 5
... Locus connection part.

Claims (1)

(57) [Claims] 1. An entire-area numerical control data is created based on a drawing, and when a modified part occurs in a prototype model produced based on the entire-area numerical control data, only the modified part of the modified prototype model is scanned. By doing so, the partial numerical control data of only the correction part is created, the part corresponding to the correction part in the whole numerical control data is deleted, and the whole numerical control data of the non-correction part is created, The whole numerical control data of the section and the partial numerical control data are drawn, and the partial numerical control data is moved line by line such that the corresponding end point overlaps the position of the end point of the whole numerical control data of the uncorrected section. The combining process is repeated for all lines and combined with the global numerical control data of the non-corrected portion to create global numerical control data of the corrected prototype model. Numerical control data generating method, characterized in that the.