JP3172219B2 - 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 a numerical control program for a numerically controlled machine tool (hereinafter referred to as a numerical control program) by analyzing a workpiece shape input by an operator and a processing method thereof, determining a tool path for processing the workpiece shape. , NC programs).

[0002]

2. Description of the Related Art FIG. 7 is a block diagram showing an example of a conventional automatic programming device. The operator inputs shape data input means 1 and machining method instruction data input means 2 respectively.
The shape data KM and the processing method instruction data KLD input via the CPU are read and analyzed by the processing line creating means 5 to create the processing line data KL, and are stored in the processing line data storage means 8. On the other hand, the cutting condition data KCD is read into the NC program conversion means 7 by the operator via the cutting condition data input means 4. Then, the machining line data KL stored in the machining line data storage means 8 is read into the NC program conversion unit 7, and is converted into an NC program according to the cutting condition data KCD read from the cutting condition input means 4 and output. .

When an NC program for roughing a die having a groove shape as shown in FIG. 8 from a material shape is created by such an automatic programming device, the machining line creating means 5 uses a groove ridge line. Processing line L in the direction along
Considering a plurality of processing lines as shown from 1 to processing line L5, processing line data K for performing processing sequentially from processing line L1 to processing line L5 in the direction shown by the arrow.
Create L. However, when machining is actually performed in this order, the tool cuts the material shape when machining the machining line L2, as shown in FIG. 9, which is a diagram of the mold shape viewed from the direction of arrow A in FIG. When the machining line L4 is being machined, the area where the tool is cutting the material shape (the oblique line portion Z2) is larger than the area (the oblique line portion Z1), and when the machining line L4 is further machined. This is dangerous in machining because the part of the tool without the blade comes into contact with the material shape.

[0004] Further, when the above-mentioned automatic programming device is used to create an NC program for roughing a die shape having a mountain shape as shown in FIG. N for roughing of shape
As in the case of creating the C program, the machining line creating means 5 considers a plurality of machining lines from the machining line L1 'to the machining line L7' in the direction along the peak, and performs machining in the direction indicated by the arrow. Processing line data K for performing processing in order from line L1 'to processing line L7'
Create L. However, when the machining is actually performed in this order, as shown in FIG. 11, which is a diagram of the mold shape viewed from the direction of arrow B in FIG. 10, the tool changes the material shape when machining the machining line L6 ′. The area (hatched portion Z4) where the tool cuts the material shape when processing the processing line L2 'is larger than the area being cut (hatched portion Z3),
Further, when machining the machining line L2 ', the portion of the tool without the blade comes into contact with the material shape, which is dangerous in machining.

[0005]

In the above-mentioned conventional automatic programming device, when creating an NC program for machining a groove shape or a mountain shape, a machining line in which a part without a blade of a tool comes into contact with a material when creating an NC program. Since the NC program is created in this order, there is a problem that an excessive load is applied to the tool and the material, and the tool and the material are damaged during the processing. The present invention has been made in view of the above circumstances, and an object of the present invention is to perform safe machining without contacting a material without a blade portion of a tool when performing a groove-shaped or mountain-shaped mold processing. To provide an automatic programming device capable of creating an NC program capable of performing the following.

[0006]

The present invention SUMMARY OF] is the workpiece shape by analyzing the entered work shape and its machining method
N of a groove shape or chevron shape to determine the order to end the processing line of a plurality of processing lines and start processing line of said processing line for processing numerically controlled machine tool for machine
The present invention relates to an automatic programming device for automatically creating a C program, and an object of the present invention is to provide a reference machining line designated by input reference line data .
Of the processing lines that are symmetrical when
From the processing line farthest from the reference processing line
The symmetrical processing line toward the reference processing line
Are processed alternately, and the reference processing line is added last.
Conversion means for converting the order of the processing lines to the order of processing
Converting the order of the processing lines according to the instructions of
This is achieved by providing a step .

[0007]

According to the present invention, when creating an NC program for machining a groove shape, the order of machining lines is configured so that machining is performed alternately from both sides of the groove toward the groove ridge line, and the mountain shape is formed. When creating the NC program for machining, the order of machining lines is configured so that machining is performed alternately from the summit line to the flat part of the material on both sides of the summit line. It is possible to create an NC program that can process a groove shape or a mountain shape without contacting the surface.

[0008]

FIG. 1 is a block diagram showing an example of an automatic programming device according to the present invention in correspondence with FIG. 7, and the same components are denoted by the same reference numerals and description thereof will be omitted. Processing line data KL stored in processing line data storage means 8
The reference line data KKD for designating an arbitrary processing line in the above as a reference line is input by the operator to the processing line order conversion means 6 via the reference line data input means 3 and the operator performs the processing.
Whether to perform grooving through method instruction data input means 2
Processing method instruction data KLD 'indicating whether to perform processing is added.
It is input to the construction line order conversion means 6 . The processing line data KL stored in the processing line data storage means 8 is read into the processing line order conversion means 6, and the processing line order is converted based on the reference line data KKD read from the reference line data input means 3. The converted processing line data KLT is created and stored in the processing line data storage means 8. Then, the converted processing line data KLT stored in the processing line data storage means 8 is read into the NC program conversion means 7 and the cutting condition data input means 4
Is converted into an NC program in accordance with the cutting condition data KCD read from and output.

FIGS. 2, 3 and 4 are flow charts showing an example of the operation of the processing line sequence converting means 6 which is a main part of the automatic programming device of the present invention. First, the processing line order conversion means 6 analyzes the reference line data KKD read from the reference line data input means 3, and in the case of groove processing, sets a processing line for processing a groove ridge line as a reference processing line, In the case of machining, the machining line for machining the peak line is set as the reference machining line, and the number of the reference machining line is k.
Further, the processing line data KL stored in the processing line data storage means 8 is analyzed, and the total number of processing lines is set to n (step S1). Next, the processing line order conversion means 6 reads the processing read from the processing method instruction data input means.
From the method instruction data KLD ', it is determined whether to perform the groove processing (count the order of the processing lines inward) or perform the mountain processing (count the order of the processing lines outward) (step S).
2) If groove processing is to be performed, the process is determined to be inward machining and the process proceeds to step S3; if mountain processing is performed, outward processing is determined to be performed and process proceeds to step S8. by the way,
Inward machining refers to machining in the order of machining lines L1,..., Machining line L5 alternately from machining lines L1, L2 on both sides of the groove toward machining line L5 on the groove ridge line as shown in FIG. The outward machining is, for example, as shown in FIG. 6, the machining line L1 'is alternately arranged from the machining line L1' of the summit line to the machining lines L6 'and L7' of the skirt across the summit line. , Processing lines L7 '.

If it is determined in step S2 that the machining is inward machining, the machining line sequence conversion means 6 determines which of the reference machining line is closer to the start machining line or the end machining line (step S3). In step S3,
If it is determined that the reference machining line is closer to the start machining line, the machining line order converting means 6 sets the end machining line as the first machining line toward the start machining line (n
Numbering is performed up to the (-2k + 1) th processing line (step S4), and the remaining (2k-1) processing lines are the processing line on the end processing line side, the processing line on the start processing line side, and the end processing line side. The numbering is performed in an inward direction alternately as in the processing line (step S5). If it is determined in step S3 that the reference machining line is closer to the end machining line, the machining line order conversion means 6 sets the start machining line as the first machining line toward the end machining line (2k−n). Numbering is performed up to the -1) processing line (step S6), and the remaining (2 (nk) +1) processing lines are processed on the start processing line side, the processing line on the end processing line side, Numbering is alternately performed inward, as in the processing line on the start processing line side,... (Step S7).

If it is determined in step S2 that the machining is outward machining, the machining line sequence converting means 6 determines which of the start machining line and the end machining line is closer to the reference machining line (step S8). Step S8
When it is determined that the reference processing line is closer to the start processing line, the processing line order conversion means 6 sets the reference processing line as the first processing line, the processing line on the start processing line, and the end processing line. Are alternately numbered outwardly to the (2k-1) th processing line as in the processing line (step S9), and the remaining (n-2k + 1)
Numbering is performed on the book processing lines up to the end processing line toward the end processing line (step S10). Step S
If it is determined in step 8 that the reference processing line is closer to the end processing line, the processing line order conversion means 6 sets the reference processing line as the first processing line, the processing line on the end processing line, and the start processing line. .. Are numbered alternately outward to the (2n−2k + 1) th processing line, such as the processing line on the side (step S11), and the remaining (2k)
-N-1) The number of processing lines is assigned to the start processing line up to the start processing line (step S12).

[0012]

As described above, according to the automatic programming device of the present invention, it is possible to create an NC program capable of processing a groove shape or a mountain shape without a portion having no blade of a tool coming into contact with a material. Since an unreasonable load is not applied to the tool or the material, an accident due to damage of the tool or the material can be prevented, and safety is improved.

[Brief description of the drawings]

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

FIG. 2 is a flowchart showing an operation example of a main part of the automatic programming device of the present invention.

FIG. 3 is a partial view of FIG. 2;

FIG. 4 is a partial view of FIG. 2;

FIG. 5 is a perspective view for explaining processing of a groove shape by the automatic programming device of the present invention.

FIG. 6 is a perspective view for explaining processing of a mountain shape by the automatic programming device of the present invention.

FIG. 7 is a block diagram showing an example of a conventional automatic programming device.

FIG. 8 is a perspective view for explaining processing of a groove shape by a conventional automatic programming device.

FIG. 9 is a side view for explaining processing of a groove shape by a conventional automatic programming device.

FIG. 10 is a perspective view for explaining processing of a mountain shape by a conventional automatic programming device.

FIG. 11 is a side view for explaining processing of a mountain shape by a conventional automatic programming device.

[Explanation of symbols]

 3 Reference line data input means 6 Processing line order conversion means

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-62-208858 (JP, A) JP-A-61-272803 (JP, A) JP-A-1-205954 (JP, A) (58) Investigation Field (Int.Cl. ⁷ , DB name) B23Q 15/00-19/28 G05B 19/18-19/46

Claims (2)

(57) [Claims] An input work shape and a processing method thereof are analyzed, and a plurality of processing lines for processing a groove shape in the work shape, and from a start processing line to an end processing line of the processing line. In an automatic programming device that automatically creates an NC program for a numerically controlled machine tool, the reference machining line, which is a machining line for machining a groove ridge line, has a symmetric shape when a symmetric axis is set. Among the processing lines, the symmetrical processing lines are alternately processed from the processing line furthest from the reference processing line toward the reference processing line,
An automatic programming device, comprising: a conversion unit that converts an order of the processing lines into an order in which the reference processing lines are processed last. 2. A method for analyzing an input workpiece shape and a processing method thereof, a plurality of processing lines for processing a mountain shape in the workpiece shape, and a processing line from a start processing line to an end processing line of the processing line. In an automatic programming device for automatically creating an NC program for a numerically controlled machine tool, a reference machining line, which is a machining line for machining a peak line, is first machined, and the reference machining line Of the processing lines that are symmetrical when を is the symmetric axis, the processing lines in the order in which the symmetrical processing lines are processed alternately from the processing line closest to the reference processing line to the outer processing line. An automatic programming device comprising a conversion means for converting an order.