JPH0740191A - Numerical control device - Google Patents

Abstract

PURPOSE:To set the optimal cutting condition value in response to the working condition by setting a cutting condition value on the basis of an existing data table corresponding to the existing pattern of the working condition, which corresponds to a pattern formed by the selective details data about a specified item of the working condition. CONSTITUTION:When non-stage is judged by a judging means, a second cutting condition value setting means 10 reads out the existing pattern of the working condition corresponding to a pattern formed by the selective details data about a specified item of the working condition among the newly input selective details data and the existing data table of the cutting condition corresponding to the read-out existing pattern from a second memory means 22. At the time of forming a working program automatically, the cutting condition value is set on the basis of this read-out existing data table.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention automatically determines a cutting condition value by referring to a predetermined cutting condition value table corresponding to the machining condition when automatically generating a machining program based on the set machining condition. The present invention relates to a numerical control device.

[0002]

2. Description of the Related Art Conventionally, as a numerical control device, values of cutting conditions such as a feed rate and a peripheral speed (rotation speed) are cut during machining of a workpiece.
It is known to have a function of rewriting a registered value in a data table to a desired value when a preset value preset by a data table in a storage unit in the device is changed to a desired value. For example, regarding machining condition items such as machining mode and material, there is a pattern that is formed with fine items selected in advance from the fine item group provided under each item, and the data table of the cutting conditions corresponding to this is read out and sent. When preset values such as speed and peripheral speed are automatically determined and set in the machining program, and then the preset values of cutting conditions are changed to desired values according to the machining situation, the relevant data table When a machining program is automatically generated next time and a machining program is automatically generated with a pattern of the same machining condition, a numerical controller that sets the cutting condition value in the machining program based on the updated data table has been developed. Japanese Patent Publication No. 5-168).

[0003]

However, in the numerical control device described above, only a few machining condition items such as machining mode and material are set. With such a number of items, cutting according to the machining situation is performed. It is insufficient as a condition value setting. Therefore, even if the data table of the cutting conditions is updated, the cutting condition value must be adjusted / changed again when the next processing is performed under the same processing conditions, which is inefficient. Of course, it is possible to increase the number of processing condition items as a solution to the problem, but it is complicated to create a data table of cutting conditions by calculating the feed rate and peripheral speed corresponding to many items. There is a problem that enormous effort is required and the production cost is increased.

In addition, in today's technical situation where the material and tool materials are remarkably improved, even if a data table of cutting conditions corresponding to many items is created by a complicated calculation, the data table becomes obsolete and processed in a short period of time. There is also a problem that it does not match the current situation. Therefore, an object of the present invention is to provide a numerical control device capable of setting the optimum cutting condition value for the machining situation by simply changing and setting the data table of the cutting conditions corresponding to the machining conditions of many items.

[0005]

The gist of the present invention is to refer to a predetermined cutting condition value table corresponding to the machining condition when automatically generating a machining program based on the set machining condition. A numerical controller for automatically determining a cutting condition value and setting it in the machining program,
For each item constituting the machining condition, a machining condition data input means for inputting the data of each fine item selected from the fine group provided under each item, and a desired item for each predetermined item constituting the cutting condition When the cutting condition data input means for inputting data and the selected fine data is inputted by the machining condition data input means and the cutting condition data is inputted by the cutting condition data input means, the machining condition formed by the selected fine data Storing the arbitrary pattern of No. 1 in the first storage unit and storing an arbitrary data table of cutting conditions formed by the cutting condition data in association with the arbitrary pattern in the first storage unit; Existing patterns of processing conditions formed by fine items preselected for each specific item of specific items among the items configuring the When the selected detail data is newly input by the second storage means that stores the existing data table of cutting conditions provided corresponding to each turn and the processing condition data input means, the selected detail data Judgment means for judging whether or not an arbitrary pattern of processing conditions corresponding to the pattern to be formed is already stored in the first storage means, and if the judgment means judges that it is stored, the processing conditions A first cutting condition value setting means for reading out an arbitrary data table of cutting conditions corresponding to the arbitrary pattern from the first storage means and setting it as a cutting condition value in the machining program when the machining program is automatically generated; If it is determined by the determination means that the data is not stored, the specific item of the processing condition of the newly input selected sub-item data is The ready-made pattern of the processing conditions corresponding to the pattern formed by the selected detailed data and the ready-made data table of the cutting conditions corresponding to the ready-made pattern are read from the second storage means, and are processed when the machining program is automatically generated. The gist is that the program is provided with a second cutting condition value setting means for setting a cutting condition value.

[0006]

According to the numerical control device of the present invention configured as described above, when the selected detail data is input by the processing condition data input means and the cutting condition data is input by the cutting condition data input means, the storage means is operated. A first storage means for storing an arbitrary pattern of machining conditions formed by the selected fine data, and a first memory for storing an arbitrary data table of cutting conditions formed by the cutting condition data in association with the arbitrary pattern. Store in the means. Further, the second storage means is provided corresponding to each of the ready-made patterns of the processing conditions formed by the sub-items selected in advance for each of the specific items of the items constituting the processing conditions and the ready-made patterns. The existing data table of the selected cutting conditions is stored.

When the selected detail data is newly input by the processing condition data input means, the determination means causes the arbitrary pattern of the processing conditions corresponding to the pattern formed by the selected detail data to be stored in the first storage means. It is determined whether or not it is already stored. When it is determined that the data is stored by the determination means, the first cutting condition value setting means reads out the arbitrary data table of the cutting conditions corresponding to the arbitrary pattern of the corresponding processing conditions from the first storage means, and the processing program Set as a cutting condition value in the machining program during automatic generation. On the other hand, if it is determined by the determination means that the data is not stored, the second cutting condition value setting means sets the pattern formed by the selected fine data for the specific item of the processing condition among the newly input selected fine data. The ready-made pattern of the corresponding machining conditions and the ready-made data table of the cutting conditions corresponding to the ready-made patterns are read from the second storage means and set as the cutting condition values in the machining program when the machining program is automatically generated. In short, when the selected detail data is newly input, if the arbitrary pattern corresponding to the pattern made up of the selected detail data already exists, the cutting condition value is set based on the arbitrary data table corresponding to the arbitrary pattern. If there is no corresponding arbitrary pattern, the cutting condition value is set based on the existing data table corresponding to the existing pattern corresponding to the pattern consisting of the selected fine data selected for the specific item of the processing condition.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. First, FIG. 1 is a block diagram showing a schematic configuration of a numerical controller to which the present invention is applied, and FIG. 2 is an explanatory diagram of a processing condition pattern. As shown in the figure, the numerical controller comprises a main controller 10 configured as a logical operation circuit and having an information processing function.
A main storage unit 20 having a sufficient storage capacity, a program storage unit 30 storing various processing programs, N
Machine drive system (servo motor) of C lathe machine part (not shown)
A processing control unit 40 for controlling M and the like, an operation control unit 50 for inputting / outputting signals and processing with various switches and overrides provided on a machine operation panel (not shown),
An interface section 60 for inputting / outputting signals to / from an input / output device and processing is mainly configured.

The main storage unit 20 has a program area 2
1 and the data area 22 are set. In the program area 21, the machining program area MPE
And an execution control program area EPE,
The data area 22 includes a work area WKE for processing and temporary storage of data, a ready-made pattern file area MCE in which ready-made patterns of machining conditions are stored, a cutting condition file area CFE, and a learning data file.
Area LDE etc. are provided. In the cutting condition file area CFE, a ready-made data table TBS of cutting conditions corresponding to respective ready-made patterns of processing conditions is stored in advance. In the learning data file area LDE, an arbitrary pattern MCP of a processing condition for user setting, an arbitrary data table (hereinafter referred to as a user table) TB
U and the reference table TBR are stored.

The program storage unit 30 stores a system control program for controlling the entire apparatus and task processing such as machining program generation processing, execution control program generation processing, data rewriting processing, machining condition setting processing, and cutting condition setting processing. Programs and machining programs corresponding to various works are stored. Since the details of these processes are disclosed in Japanese Patent Publication No. 5-168,
The description is omitted. Further, the machining control unit 40 controls the mechanical drive system M of the NC lathe device, but since it is well known, its details are omitted.

The operation control unit 50 includes overdrive keys SW1 and SW2 for adjusting the cutting feed speed.
Overdrive key S for adjusting the spindle speed
W3, SW4, a command key VFC for commanding rewriting of the programmed peripheral speed and feed rate ratio, etc. are connected. Input / output devices such as a display CRT, a printer PRT, and a keyboard KYB are connected to the interface unit 60. In the numerical controller configured as described above, the main control unit 10 outputs a selection screen for either manual setting or automatic setting of the machining condition pattern and the cutting condition value to the display CRT at startup. When the manual setting is selected, a list of processing condition items and detailed items is output.

As shown in FIG. 2, the items of processing conditions and details are as follows: processing mode {outer diameter processing BAR-OUT / groove processing GRV
-IN / copying COPY-OUT / screw processing THR-IN / ...},
Material Material {Carbon steel for machine structure S45C / Aluminum A
L / Stainless steel SUS / Chromium molybdenum SCM / ...
・}, Tool material {high speed steel / butterfly / ceramic /
Cermet / ...}, material length (selection of numerical range),
Material outer diameter (selection of numerical range) is set (elements in {} are fine). Each item and item are displayed on the display CRT, and when a desired item (code, name, numerical value, etc.) for each item is entered from the keyboard KYB, the selected item group entered as an arbitrary pattern MCP of the processing conditions. It is set during the machining program MP. The arbitrary pattern MCP of the processing condition is, for example, a combination pattern formed by the hatched fine lines in FIG. In addition to the above items, items such as machining shape, machining dimension, cutting point, work protrusion amount, work thickness, chuck grip allowance, chuck pressure, tool shape, tool protrusion amount, tool shank diameter, presence of center, etc. May also be set. The number of items and the number of items may be increased. Instead of displaying them on the display CRT, a selection switch group corresponding to each item of items is provided in a part of the operation panel to operate a desired switch. Alternatively, the processing condition may be selected.

When the sub-items are selected and set for each item in this way, the main control section 10 executes the processing condition pattern registration processing. Hereinafter, this process will be described with reference to the flowchart of FIG. When the processing is started, first, in step 100, the learning data file area LDE
From, the arbitrary pattern group MCP of the processing conditions for user setting
Is read, and it is determined whether or not an arbitrary pattern corresponding to the pattern formed by the selected item group has already been registered therein. When a negative decision is made that the corresponding arbitrary pattern is not registered, the routine proceeds to step 110, where it is decided whether or not there is a blank area in the learning data file area LDE.
Go to step 120. In step 120, the oldest registered arbitrary pattern and its user table TBU are deleted by the first-in first-out method, a new arbitrary pattern MCPn is registered, and the user table TBU is set. Update the registered pattern. On the other hand, when an affirmative decision is made that a blank area remains, the routine proceeds to step 130, where a new arbitrary pattern MCPn is additionally registered from the beginning of the blank area, and its user table TBU is set. From step 120 or step 130 to step 140, the user table TBU of the new pattern MCPn is displayed on the display CRT as a reference table. Continued Step 150
Then, the cutting condition value actually used for machining is registered in the user table TBU, and the process is terminated. Here, the cutting condition values are the peripheral speed during rough machining (Rrω), the peripheral speed during finish machining (Frω), and the rough machining feed rate (Rf).
r), a roughing cutting point (Rcp), etc. FIG. 4 shows an example of the registration pattern and the user table TBU.
On the other hand, if it is determined in step 100 that the arbitrary pattern has already been registered, the process branches to step 160.
In step 160, the registration arbitrary pattern MCPr
And the user table TBU belonging thereto are displayed on the display device CRT. In the following step 170, when the cutting condition value is changed and a data registration command is issued, the existing arbitrary pattern and user table TBU are deleted and left justified, and the arbitrary pattern MCPr and the changed user table TBU are set. The learning data file area LDE is again set / updated by the first-in / first-out method, and the process is ended. Note that the registration pattern update / new registration processing in step 120 may be configured by a memory of the first-in first-out method and can be realized by hardware.

When the registered arbitrary pattern MCP and the user table are updated and set in this way, the main control section 10
The cutting condition value is automatically determined at the time of creating the machining program based on the arbitrary pattern and the cutting condition value of the user table TBU. The main control unit 10 also causes the display to output a setup information screen. For example, as shown in FIGS. 5, 6, 7, and 8, an information screen (FIG. 5) showing an overview of machining,
The information screen showing the details of the shape and dimensions of the head and the outer jaw (Fig. 6), the information screen showing the details of the machining shape (Fig. 7), the information screen showing the details of the tool used (Fig. 8), etc. are the display CRT. Is output to. When a print command is input from the keyboard KYB, a setup information sheet having the same format as the display output is output from the printer PRT. In this way, all information related to processing is output in a format that is easy to see. Subsequently, the main control unit 10 compiles the machining program into an execution control program based on a well-known EIA / ISO code or the like. Then, the processing control unit 40
The machine drive system M of the NC lathe is controlled according to the generated execution control program to execute the material processing. Since the automatic determination of the machining program and the execution control program are disclosed in Japanese Patent Publication No. 5-168, the details are omitted. By the way, the main control unit 10 displays a selection item as to whether or not to automatically determine the cutting condition value as a part of the menu screen. However, only the machining condition is input from the keyboard KYB, and the automatic determination command is then issued. When input, cutting condition value automatic determination processing is executed.

This process will be described below with reference to the flowchart of FIG. When the processing is started, the operator first manually inputs the machining program in step 200, and in the subsequent step 210, the pattern formed by the selected fine data set in the inputted machining program (input selected fine data). , Is searched and determined whether or not it is in the arbitrary pattern group of the processing conditions already registered. The corresponding arbitrary pattern in step 210 and the process proceeds to step 220. In step 220, the cutting condition file area CFE is searched for an existing pattern that is the closest to the input selected fine data, and the cutting condition data table TBS corresponding to the existing pattern is read to set the cutting condition value and the processing is performed. End once.

On the other hand, if it is determined in step 210 that there is an arbitrary pattern of matching processing conditions, the process branches to step 230. In step 230, the learning data file
The user table TBU corresponding to the arbitrary pattern MCP is read from the area LDE, and the peripheral speed during rough machining (Rrω), the peripheral speed during finish machining (Frω), the rough machining feed rate (Rfr), the rough machining cut point. A value such as (Rcp) is set as the cutting condition value, and the process is temporarily terminated. Incidentally, the existing pattern of the processing conditions is a pattern formed with the selected fine items only in the three items of the processing mode, the material material, and the roughing / finishing. The details are described in JP-B-5-168. The description is omitted here. Here, it is assumed that the trial machining is performed after the cutting condition value is automatically determined. During this machining process, the override keys SW1, SW2, SW3, S
It is assumed that W4 is operated to adjust the feed speed and the peripheral speed. Further, it is assumed that the command key VFC is pressed to instruct the rewriting of the set value of the cutting condition. When the command key VFC is pressed, the main control unit 10 temporarily stores the changed cutting condition value (hereinafter, referred to as a changed value) in the work area WKE.

Then, the main control unit 10 executes the data learning process after the end of the machining sequence of the trial machining.
This process will be described below with reference to the flowchart of FIG. When the process starts, first in step 300,
The changed value is read from the work area WKE, and the set value of the cutting condition in the machining program is rewritten to the changed value. Subsequently, in step 310, the same processing as the processing condition pattern registration processing described above is executed for the currently set processing condition pattern and change value, and the processing is ended once. While the machining control unit 40 is controlling the machine drive system M of the NC lathe device according to the execution control program,
When the command key VFC is pressed, this process may be executed immediately as an interrupt process.

As described above, in this embodiment, at least five items are provided when the command key VFC is pressed to instruct the rewriting of the set value of the cutting condition or the manual setting of the machining condition is performed. Since the arbitrary pattern MCP of the processing conditions and the user table TBU of the cutting condition values corresponding thereto are updated and newly registered (or only new registration is performed), the user table of the cutting condition values corresponding to the multi-item processing conditions. A TBU can be easily created or its value can be changed. Therefore, the optimum cutting condition value can be set in accordance with the current state of processing, and good material processing can be performed. Therefore, it is not necessary to obtain the cutting condition value by a complicated calculation as in the past, and
An appropriate value can be set according to the actual machining situation.

In addition, the present embodiment is based on the empirical fact that it is effective to set the cutting condition value based on actual working experience in today's technical situation where the material and tool materials are remarkably improved. It was invented paying attention. In other words, the actual machining situation can be modeled as an arbitrary pattern composed of a multiplicity of machining condition items, and the optimum value of the cutting condition obtained through experience and skill can be reflected in the user table TBU. It is configured. Therefore,
It is possible to record and accumulate the processing know-how of the user who actually performs the processing using this device. Further, since the arbitrary parameter of the processing condition and the cutting condition value are recorded and can be confirmed by the screen output or the print output, the processing status can be grasped very easily.

[0020]

As described above in detail, according to the numerical controller of the present invention, when the selected detailed data is newly input,
When an arbitrary pattern of the processing conditions corresponding to the pattern formed by the selected fine data already exists, the cutting condition value is set based on the arbitrary data table corresponding to the arbitrary pattern. On the other hand, when the corresponding arbitrary pattern does not exist, the existing data table corresponding to the existing pattern of the processing condition corresponding to the pattern formed by the selected specific data of the specific item of the processing condition of the newly input selected specific data. The cutting condition value is set based on Therefore, it is possible to easily create / change an arbitrary cutting condition data table corresponding to the machining conditions of many items. Therefore, it is possible to set an optimum cutting condition value according to the current processing state, and it is possible to perform favorable material processing.

[Brief description of drawings]

FIG. 1 is a block diagram of a numerical controller according to an embodiment.

FIG. 2 is an explanatory diagram showing a list of processing condition items.

FIG. 3 is a flowchart of processing condition pattern registration processing executed by a main control unit.

FIG. 4 is an explanatory diagram illustrating an example of a registration pattern and a user table.

FIG. 5 is an explanatory diagram showing machining information indicating a general condition of machining and a condition of tools used.

FIG. 6 is an explanatory diagram showing processing information indicating the shapes and dimensions of a head and chuck jaws.

FIG. 7 is an explanatory diagram illustrating processing information indicating a processing shape and the like.

FIG. 8 is an explanatory diagram showing processing information indicating tool information and the like.

FIG. 9 is a flowchart of a cutting condition value automatic determination process executed by a main control unit.

FIG. 10 is a flowchart of a data learning process executed by the main control unit.

[Explanation of symbols]

 10 ... Main control unit 20 ... Main storage unit 21 ... Program area MPE ... Machining program area EPE ... Execution control program area 22 ... Data area MCE ... Pattern file area CFE ... Cutting condition file area TBS ... Ready data table LDE ... Learning data file area MCP ... Machining condition arbitrary pattern TBU ... Cutting condition arbitrary data table 30. ..Program storage unit 40 ... Processing control unit 50 ... Operation control unit 60 ... Interface unit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hideto Funabashi, No. 1 boarding, small-scale, Oguchi-machi, Niwa-gun, Aichi Yamazaki Mazak Co., Ltd. factory

Claims (1)

[Claims] 1. When automatically generating a machining program based on a set machining condition, a cutting condition value is automatically determined by referring to a predetermined cutting condition value table corresponding to the machining condition. The numerical control device for setting the machining conditions, the machining condition data input means for inputting the data of each fine item selected from the fine item group provided under each item for each item constituting the machining condition, and the cutting condition. For each of the predetermined items constituting, the cutting condition data input means for inputting desired data, and the selected fine data is inputted by the machining condition data input means, and the cutting condition data is inputted by the cutting condition data input means, An arbitrary pattern of machining conditions formed by the selected fine data is stored in the first storage means, and the cutting condition data is associated with the arbitrary pattern. Storage means for storing an arbitrary data table of cutting conditions formed by the first storage means, and machining formed by a preselected item for each specific item of specific items among items constituting the machining condition The second storage means for storing the ready-made patterns of conditions and the ready-made data table of cutting conditions provided corresponding to each of the ready-made patterns, and the selected detailed data are newly input by the processing condition data input means. And a judgment means for judging whether or not an arbitrary pattern of the processing conditions corresponding to the pattern formed by the selected fine data is already stored in the first storage means, and the judgment means stores it. When judged, the arbitrary data table of the cutting conditions corresponding to the arbitrary pattern of the corresponding processing conditions is read out from the first storage means and added. The first cutting condition value setting means which is set as a cutting condition value in the machining program when the program is automatically generated, and the processing condition among the newly input selected detailed data when it is judged that the cutting condition value is not stored by the judging means. Of the existing pattern of the processing conditions corresponding to the pattern formed by the selected detailed data of the particular item and the existing data table of the cutting conditions corresponding to the existing pattern are read from the second storage means, and the processing program is automatically executed. A numerical control device comprising: a second cutting condition value setting means for setting a cutting condition value in a machining program at the time of generation.