JPS61251908A - Drilling program generating method - Google Patents

Abstract

PURPOSE:To reduce the number of times of tool change to shorten the working time by determining a selection sequence of tools used in all working programs having common tools and generating a drilling program on a basis of this sequence. CONSTITUTION:In a step (1), working programs where records including using tools and working depths are arranged in the order of working process for individual holes different in shape. In a step (2), the tool which is most frequently used in individual working programs commonly is obtained. In a step (3), each working program including this common tool as a using tool is separated into the first working program part preceding this tool and the second working program part following this tool. In a step (4), steps (2) and (3) are repeated until the first program part and the second program part have not common tools, and a tool selection sequence of a used tool group is determined. In a step (5), the hole working program is generated on a basis of this tool selection sequence. By this method, the number of times of tool change is reduced to shorten the working time.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method for creating a hole machining program, and more particularly to a method for creating a hole machining program that can reduce the number of tool changes.

<Prior Art> There is an automatic programming device that automatically creates an NC program for hole machining. According to such an automatic programming device, it is possible to input data interactively using a graphic display screen and create a custom NC program from a design drawing with simple operations.

By the way, when creating a conventional NC program for drilling holes, a large number of holes are divided into groups according to holes of the same shape (holes with the same depth, size, and race) to form one group. Machining all holes Machining all holes in the coal charging group,
An NC program for drilling is created so that all holes will be machined in the same manner from now on.

<Problems to be Solved by the Invention> Usually, a plurality of tools are used to machine one hole. For example, a screw hole is machined by sequentially performing a center milling process using a centriel, a drilling process using a drill, a countersinking process using a countersinking tool, and a tapping process using a tap tool. Therefore, focusing only on the order of the tools used in each group, the first group: T11. , T12...TIA 2nd group: j
2],,T22. ...T2B mth group:
Tm 1. Tm 2. ...TmM. By the way, the tool used for drilling holes in one group is also used for drilling holes in another group. Therefore, if the order in which the tools used for hole machining are used is properly determined, the number of tool changes will be reduced, and machining time can be shortened.

However, in the conventional system, the holes in the next group are machined after all the holes in one group have been machined, so the same tool is selected many times, which increases the number of tool changes and increases the machining time. There was a problem.

From the above, an object of the present invention is to provide a method for creating a hole machining program that can reduce the number of tool changes.

<Means for Solving the Problems> The method for creating a hole machining program of the present invention includes the first step of creating a machining program in which records including tools used and machining depths are arranged in the order of machining steps for each hole with a different ta+ shape. , (blSecond step of checking whether there is a tool that can be used in common for each hole machining and finding the tool that is most likely to be used in common, (C) for each tool that includes the common tool found above as a used tool. The machining program is divided into a first machining program part before the common tool and a second machining program part after the common tool, and the tool selection order is changed from the tool group used in the first machining program → the common tool → the second machining program part. a third step of forming a tool group to be used in the machining program;
, 4th step of repeating the 3rd step to determine the tool selection order, (81) 5th step of creating a composite machining program by arranging the codes in the tool selection order, (fl Machining that does not include common tools) If a program exists, the second
The process includes a sixth step of determining the tool selection order for all hole machining by performing the processing after the step, and creating a hole machining program in which records are arranged in the tool selection order.

<Function> When a large number of holes are divided into groups according to holes of the same shape (holes with the same depth, size, and type), the tool used for drilling holes in one group can be used for drilling holes in another group. It may also be used. In such a case, if each group is processed continuously using the common tool, the number of tool exchanges will be reduced by (M-1) compared to the conventional method.

Tat! C and M are the number of groups using a common tool.

Therefore, in the present invention, a machining program is created by arranging records that include at least the tools used and the machining depth in the order of the machining process for each hole with a different shape. Find the tool with the highest degree of common use.

Next, each machining program including the obtained common tool as a used tool is separated into a first machining program part before the common tool and a second machining program part after the common tool, and the tool selection order is changed to the first machining program part. A group of tools used in the section → the common tool → a group of tools used in the second machining program section.

Thereafter, the above steps are repeated until there are no common tools for each first machining program part and each second machining program part, and the tool selection order of the tool group used in the first machining program part and the second machining program are Determine the tool selection order of a group of tools used in a section, and determine the tool selection order of tools used in a goldstone nib program having a common tool. Note that in this tool selection order, the order in which the tools are used for each hole is not changed.

Next, a pre-synthesis nibogram is created by arranging the records in the order of tool selection.

If there is a machining program that does not include the common tool, the same processing is performed on the machining program and the composite machining program to determine the tool selection order for machining all holes, and record records in the tool selection order. Create a Daichi Nibrogram by arranging .

<Embodiment> FIG. 2 is a block diagram of an automatic programming device to which the present invention can be applied. In the figure, 11 is the main body of the computer configuration, including processors 11a1ROMI l b, R
It has AMI 1 c. 12 is the keyboard, 13
is a display device, 14 is a disk controller, and has two floppy disk drives 14a, ],
4b. Although not shown, a printer, tape reader/puncher, magnetic tape device, and other data input/output devices may be connected as appropriate. In such an automatic programming device, prior to execution of automatic programming,
Set the floppy FDI in which the system program for creating the NC program is stored in the floppy disk drive 14a, then start the loading program stored in the ROM 11b and read the system program into the RAM 11c. Program creation processing becomes possible. Note that the created hole machining program is stored in the floppy FD2.

Hereinafter, the hole machining NC program creation process according to the present invention will be explained according to the flowchart of FIG. 3.

(1) Generate a machining program (part program) for each hole with a different shape. Note that this machining program is generated, for example, by the following processing. Tat! However, the description will be made assuming that the tool is not automatically determined.

(al First, select the machining process for machining a hole with a predetermined hole shape. For example, if it is a screw hole, the hole machining is performed in the order of center fir, drilling, countersinking, and tapping. First, select center fir.

Next, input the tool number of the tool used for the hole machining process selected in step (al).It is also possible to automatically determine the appropriate tool from the hole dimensions.

After inputting tc+tool number, input the hole machining depth etc. using the tool.

(dl) Next, check whether all machining processes have been identified. If not, repeat the processing from step Fal onwards.

(e) If all machining steps have been specified, input the hole positions. Note that if there are multiple holes with the same shape and the same depth, the positions of each hole are also input.

(f) Check to see if there is a hole with the shape of a different role, and if so, the processing from step ta+ onward is performed on the hole, and finally a machining program is created for each hole with a different shape. Ru.

FIG. 4 is an explanatory diagram of the machining program, and shows Pl (i=1
．． 2. ) is the first machining program, R, (
i=1, 2.・ ・i]−”y 2y ・ ・
) j is a record, and PN is a pointer register that stores a pointer. Each record R is composed of a tool number T, machining depth, feed rate F, spindle rotation speed S14, etc. Further, the pointers include a pointer pointing to record R1 and a pointer pointing to pointer register PN. and. Pointer register PNoo is the pointer of the first machining program P1, and address B of interregister PN1o.
. The first pointer of the pointer register PN,o is the pointer register PN2o of the second machining program P2.
The second pointer points to the address B of pointer register PN, and the second pointer points to the address of pointer register PN.

The first water processing program P1 includes a pointer register PN,
o, PN,, ~P N,. and record R11~R1n
Consisting of pointer registers pN, , N=1.2...
) is the start address D of record R1j.
1. (It may also be a record number). Further, the second pointer of the pointer register PN, , indicates the address of the ink register corresponding to the record of the next machining process. Therefore, in the example shown in Fig. 4, the first machining program P1 commands to change the tools in the order of T, T, . Ru. The same applies to the second, third, etc. machining programs.

(2) Once the creation of machining programs for holes with different shapes is completed, find the tool that is most commonly used in each machining program. In addition, the total number of machining programs is M
If there is a tool that is commonly used in all M machining programs, that tool becomes the desired tool, and if there is no tool that is commonly used in M machining programs (M-
]) The tool used in each machining program becomes the desired tool, and the tool with the highest degree of common use is similarly obtained.

(3) The common tool T obtained above. Use tool =
11- Each machining program included as
It is separated into a machining program part (front furnace nib program part) and a second machining program part (post-processing program part).

(4) Then, the tool selection order is set as follows: tool group used in the forehearth nib program section -> common tool T, o -> tool group used in the post-processing program section. For example, if the number of machining programs is 2, the tool selection order for each machining program is T, TT...T,, TT,...
... T1゜1112ri13p1 mock ICri1fi+llT
,TT...TTT,...T2□21
22ri 23j 2j'
+ct 2 +4+ll, then T. are common tools, T,1~T,, T2. ~T2. is the tool group used in the front nib four-gram section, T,
, +, , ~T 1. p 2 L h. 1, ~T2□
is the tool group used in the post-processing program part.

(5) After the sealing, repeat steps 2 to 4 until there are no common tools for the forehearth nib program part,
Determine the tool selection order of the tool groups used in the forehearth nib program section.

(6) Next, the second to fourth steps are repeated for the post-processing program portion until there are no common tools, thereby determining the tool selection order of the tool group used in the post-processing program portion.

As described above, the order of use of tools included in all machining programs that use tool T1o as a common tool is determined. Note that in this tool usage order, the tool usage order for each hole specified in each machining program is not disrupted.

(7) Once the tool usage order is determined as described above, the records R1 (FIG. 4) are rearranged in the tool usage order to generate a pre-synthesis nibogram. Note that when sorting records, the storage position of each record is not changed, but the start position of the record (
Or by rearranging the order of pointer registers that store pointers indicating record numbers).

(8) Next, it is checked whether there is a machining program that does not use the common tool T16.

Common tool T□. If there is a machining program that does not use the tool, the processing from step (2) onwards is repeated using this machining program (not limited to one) and a composite machining program.

(9) Common tool T. If there is no machining program that does not use the tool, an NC program for machining is created using the synthetic machining program and hole position data.

The present invention will be specifically explained below with reference to FIG. Note that the first, second, and third machining programs PI.

P2. The order in which tools are used for P3 is PI: A, B, C, D, E P2: A, F, C, G, E P3: H, T, C, J, (See Figure 1 (A)).

Since the tool C is used in all the machining programs P1 to P3, the tool C is determined by the processing in the second step. As a result, in the third step, the previous month's nibogram partial pH, P21. P31 becomes PIIA, B P21: A, F P31: H,1, respectively, and the Kakegawa Nibragram part P12. P22゜P32
are respectively P21F D, E P22: c,, E P32:, 1. It becomes. Also, the tool selection order is changed to [A,
I3: A, F: H, 13 → C → [D, E: G.

E: becomes J, Nico (Figure 1 (B)).

In the fifth step, the second
When the processing after the step is performed, tool A is determined as the tool that is most commonly used. Therefore, the previous month's Nibrogram portion P 1.1. , P21, the tool selection order is A, B, F (A-F→B may also be used) (see Figure 1 (C
)).

Since there is no common tool in the synthetic tool selection order (A-B-F) of the previous month's nibogram part pH, P21 and the previous month's nibprogram part P3I, the tool usage order of the umbrella previous month's nibprogram part is A→B→F-4H→I (H→I→A→B→F is also acceptable) (Figure 1 (D)
).

Similarly, the tool selection order for the second machining program part is D→G→E→J→K (or J-, ni→D→G→E→) (Fig. 1 (E), (F)), The tool selection order for machining all holes is A→B4F-H→■→C→D→G→E→J→,
The number of tool exchanges is 10. In addition, according to the conventional method, l
・It will be necessary to change the tool 14 times.

<Effects of the Invention> According to the present invention, a machining program can be created by arranging records including the tools used and the machining depth in the order of machining steps for holes of different shapes, and can be commonly used for machining each hole. Check whether there is a tool, find the tool with the highest degree of common use, and set each machining program that includes the found common tool as the used tool to the first machining program before the common tool. and the later second machining program part, and the tool selection order is changed from the tool group used in the first machining program part to the common tool to the second machining program part.
The same process is repeated for the first machining program part and the second machining program part as a group of tools used in the machining program part, and the selection order of tools used in all machining programs having the common tool is determined. However, since the configuration is such that a nib program for each person is created based on the tool selection order, the number of tool changes can be reduced and the machining time can be shortened.

In addition, since the hole machining program is created by rearranging the pointers indicating the storage positions of each record in the order of tool selection, the process of changing the order of tool use can be performed in a short time.

[Brief explanation of drawings]

Fig. 1 is a schematic explanatory diagram of the method of the present invention, Fig. 2 is a block diagram of an automatic programming device to which the present invention can be applied, Fig. 3 is a flowchart of the processing of the present invention, and Fig. 4 is an explanatory diagram of a machining program. . Pi (i=1, 2...)... Machining program P N,...
・Pointer register, R...Record, Patent applicant: FANUC Co., Ltd. Agent, Patent attorney: Ken Saito Chimiki

Claims (4)

[Claims] (1) The first step is to create a machining program that includes records that include at least the tools used and the machining depth in the order of the machining process for each hole with a different shape.Check whether there is a tool that can be commonly used for machining each hole. , a second step of finding a tool with the highest degree of common use, each machining program that includes the found common tool as a used tool, a first machining program part before the common tool and a second machining program part after the common tool; a third step in which the tool selection order is set as follows: tool group used in the first machining program → said common tool → tool group used in the second machining program; The above-mentioned second and third
A fourth step of repeating the steps to determine the selection order of tools to be used in all machining programs using the common tool, and a fifth step of creating a composite machining program by arranging records in the order of tool selection. A method for creating a hole machining program. (2) If there is a machining program that does not include a common tool, perform the processing from the second step onward on the machining program and the composite machining program to determine the tool selection order for all holes, and The method for creating a hole machining program according to claim 1, further comprising a sixth step of creating a composite machining program in which records are arranged in the order of selection. (3) Hole machining according to claim (1) or (2), wherein a composite machining program is created by rearranging pointers indicating the storage positions of each record in order of tool selection. How to create a program. (4) The method for creating a hole machining program according to claim (3), further comprising another pointer for arranging the pointer indicating the record position in the order of machining.