JP2618724B2 - NC data creation method and apparatus - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for creating NC data for performing surface processing of a mold.

2. Description of the Related Art In surface processing of a mold, fine pick-feed processing is often performed in order to finish the surface finely. The NC data required for this processing is created, for example, according to a flowchart shown in FIG. 4 based on a control block diagram as shown in FIG.

Necessary data relating to the model M is input from the tablet 1 to the model shape creation unit 2, and the model shape creation unit 2 creates a shape of the die model based on this data (step
S1), and a processing surface is specified (step S2). The data is stored in the model shape memory unit 3. The model shape display unit 4 displays the shape on the CRT 5 based on the stored shape data. Further, data necessary for NC machining, that is, a tool diameter, a spindle rotation speed, a feed rate, and the like are designated from the keyboard 6 (step S3), and the necessary number of tools (step S4) is calculated by considering the life of one tool. . The machining area with one tool is determined and calculated by the operator. The NC data creation condition setting unit 7 designates the machining area of one tool (step S5, FIG. 5), and determines the machining mode, tool diameter,
Pick feed, approach method, approach amount, evacuation method, evacuation amount, approach and evacuation speed, rotation direction,
Set machining conditions such as tool change coolant, spindle speed, and feed rate. The set conditions are stored in the NC data creation condition memory unit 8. The stored data and the data stored in the model shape memory unit 3 are stored in the NC data creation unit 9.
(Step S6, FIG. 6), where the NC data in the designated machining area is created and stored in the NC data memory unit 10 for each machining area. When data for the number of tools, that is, NC data for the entire machining area is created and stored (step
S7), output from the NC data output unit 11 to the floppy 12 and stored (step S8), and displayed on the CRT 5 from the NC data trajectory display unit 13. If the NC data for the entire machining area has not been created, the process returns to step S5.

Problems to be Solved by the Invention In many cases, the total cutting length of the entire die surface in the fine pick-feed processing is enormous. A ball end mill is used as the machining tool.However, near the tool tip where the cutting speed is zero or near zero, the cutting conditions are poor and good sharpness cannot be obtained. There is a problem that appears. Therefore, in order to clean the machining surface, it is necessary to replace the tool with a new one before the surface becomes rough, and when creating NC data, there was a problem that the machining range had to be limited and programmed in advance. .

Further, when a program is created by dividing the processing range, the program must generate the processing range data in consideration of the processing area, and there is a problem that the programmer is burdened.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to maintain a good machining surface and reduce the burden on a programmer.
An object of the present invention is to provide a data creation device and method.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention provides an NC data creating apparatus for performing die machining using several tools of the same type, comprising model shape data and the number of tools. A region division processing unit that divides a processing region according to a processing range per unit, a division region memory unit that stores data of the region division processing unit, and storage data and NC data generation of the division region memory unit NC that creates NC data based on conditions
By instructing the number of the same type of tools including the data creation unit, the machining area of one tool is automatically divided and its NC data is created.

Further, a divided area display unit for displaying the divided area based on the storage data of the divided area memory unit is added.

Also, in the method of creating NC data for mold processing, a model shape was created based on the input data, the machining surface was specified, and the model surface was specified based on the data on the life of one tool. The required number of tools of the same type for the machining surface is determined, and the determined number of tools is divided into machining areas according to the machining range per tool to create NC data continuously for the number of tools. .

When the number of tools in consideration of the tool life is specified, the area division processing unit automatically divides the processing area by calculating the total processing area / the number of tools, and calculates the processing area per tool. NC data is created for this machining area according to the NC data creation conditions, and is created continuously for the number of tools. Further, a movement to a tool exchange position and a tool exchange operation are added between the machining data of one tool and the machining data of the next tool. Then, the divided area is displayed.

Embodiment An embodiment of the present invention will be described below with reference to FIG. 1 showing a control block diagram.

The same components as those in the conventional control block diagram are denoted by the same reference numerals, and description thereof will be omitted.

Reference numeral 21 denotes a tool number designating unit to which the determined number of tools for each process is inputted from the keyboard 6, 22 denotes a tool number memory unit for storing the number of tools, and 23 denotes data of all machining surfaces stored in the model shape memory unit 3. And the number of tools stored in the number-of-tools memory unit 22 are input, and the entire machining area /
A region division processing unit that calculates the number of tools and automatically divides and creates a processing region for one tool, 24 is a division region memory unit that stores processing data of the region division processing unit 23, and 25 is a division region memory unit. This is a divided area display unit that displays the divided area on the CRT 5 based on the stored data. Further, reference numeral 26 denotes a machining mode such as scanning line machining and shaft machining of the entire machining area, a tool diameter, a pick feed, an approach method, and an approach amount based on the storage data in the divided area memory section 24 and the data stored in the NC data creation condition memory section 8. , Evacuation method, evacuation amount, feed speed, approach and evacuation speed, spindle speed, rotation direction,
NC data divided automatically is created by inputting one processing condition such as tool change and coolant. As in the conventional case, an NC data creation unit automatically inserts a series of processes for attaching an approach operation code at the beginning of one piece of processing data and a retreat operation code when the processing area is completed.

Next, the operation will be described with reference to FIG. 2 of a flowchart. In step S11, a model shape is created based on the data input from the tablet 1, and in step S12, the processing surface is designated and the model shape memory unit 3
And display it on the CRT 5 by the model shape display unit 4. In step S13, various data necessary for NC machining, such as a tool diameter, a spindle rotation speed, and a feed speed, are designated from the keyboard 6 and input to the NC data creation condition setting unit 7 and stored in the NC data creation condition memory unit 8. In step S14, the life of one tool is examined based on past data and experimental results, and the required number of tools for the designated machining surface is input from the keyboard 6 to the tool number specifying section 21 and stored in the tool number memory section. In step S15, the NC data creation unit 9
Then, a machining area corresponding to the machining range per tool is automatically created by the area division processing unit 23 and stored in the division area memory unit 24. In step S16, NC data divided for each machining area is continuously created for the number of tools, and stored in the NC data memory unit 10. In step S17, the NC data generator 9
Between the machining data of one tool and the machining data of the next tool, the movement to the tool exchange position, the tool exchange operation, the approach operation at the beginning of one machining data, and the evacuation operation when the machining area is completed, intervene. A series of processes for performing a tool change operation is automatically inserted and stored in the NC data memory unit 10. In step S18, the NC data output unit 11 causes the NC data memory unit 10
Is read out and stored in the floppy 12. On the other hand, it is displayed on the CRT 5 by the NC data trajectory display unit 13.

Advantages The present invention has the following advantages because of the configuration described above.

By specifying the number of tools, the NC data generating apparatus according to the first aspect automatically divides a die machining area into the number of tools and can generate necessary NC data without a burden on a programmer.
By determining the number of tools for each process before starting the program creation, it is possible to standardize the program creation. Further, since the tool is changed in an appropriate machining range in actual machining, machining efficiency can be improved and finishing accuracy of the finished surface can be improved.

According to the NC data creation device of the second aspect, in addition to the effect of the first aspect, the divided area can be confirmed and used as a reference for work.

The method for creating NC data according to claim 3 has the effect of claim 1.

[Brief description of the drawings]

1 is a control block diagram of the present invention, FIG. 2 is a diagram showing a control flow, FIG. 3 is a conventional control block diagram, FIG. 4 is a diagram showing a conventional control flow, FIG. Is a region division diagram, and FIG. 6 is a diagram for processing each region. 1 tablet 2 model shape creating unit 3 model shape memory unit 6 car board 7 NC data creation condition setting unit 8 NC data creation condition memory unit 11 NC data output unit , 12… Floppy 21… Tool number specification part, 22
…… Tool number memory section 23 …… Area division processing section 24 ……
Divided area memory section, 25: Divided area display section, 26: NC data creation section

Claims (3)

(57) [Claims] In an NC data generating apparatus for performing die machining using several tools of the same type, a machining area is determined in accordance with a machining range per one tool based on model shape data and the number of tools. An area division processing unit to be divided, a division area memory unit that stores data of the area division processing unit, and an NC data creation unit that creates NC data based on storage data of the division area memory unit and NC data creation conditions. An NC data creation apparatus characterized in that, by specifying the number of tools of the same type, the machining area of one tool is automatically divided and its NC data is created. 2. A divided region display unit for displaying a divided region based on data stored in a divided region memory unit.
NC data creation device described. 3. A method for creating NC data for performing a mold machining, wherein a model shape is created on the basis of input data, a machining surface is designated, and a model shape is determined on the basis of data on the life of one tool. Determines the required number of tools of the same type for the specified machining surface, divides the determined number of tools into machining areas corresponding to the machining range per tool, and continuously creates NC data for the number of tools NC data creation method characterized by the following.