JP2005128851A - Method for preparing processing program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the using efficiency of a machine tool, by eliminating the connecting operation of two kinds of different processing programs on the machine tool at the continuously carrying out of circular cutting working and milling working by a machine tool which is able to perform circular cutting working and milling working. <P>SOLUTION: This working program preparation method comprises a process 10 of preparing a plurality of shape working programs 15 and a process 20 of preparing a working program 23 for carrying out a plurality of shape working by combining at least two or more of the plurality of shape-working programs 15, without making it necessary to carry out connection operation on an NC machine tool 30. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a method for creating a machining program such as a program used in an NC machine tool.

Conventionally, a machining program creation method of an NC machine tool reads data created by a CAD / CAM system on a computer integrally provided in a machine tool, as described in Patent Document 1 below, According to the guidance message, the operator selected data and created an operation program.
JP2003-186511

  However, in the above method, when turning and milling are performed continuously by an NC machine tool capable of turning and milling, it is necessary to combine the two different machining programs into one program. The connecting work was performed on a computer provided integrally with the NC machine tool. Accordingly, during the creation of a program on a computer integrally provided in the NC machine tool, the computer necessary for the machining operation must be occupied, so the machining of the NC machine tool must be interrupted. There was a problem that the use efficiency of the machine tool was lowered.

  In order to solve the above-described problems, the machining program creation method of the present invention is a machining program creation method for an NC machine tool capable of turning and milling, and machining accumulated for each shape to be machined. By creating a plurality of shape machining programs for machining the shape by associating the condition with numerical data representing the shape, and turning and milling with the NC machine tool, the shape to be machined And obtaining a machining program by combining two or more of the plurality of shape machining programs.

  According to the above method, since the created machining program is read into the NC machine tool and machining is started, it is not necessary to combine the programs on a computer provided integrally with the NC machine tool. . Accordingly, since it is not necessary to interrupt the machining operation of the NC machine tool by the program combining operation, the use efficiency of the NC machine tool can be improved.

  The above-described machining program creation method according to the present invention further includes a step of displaying information on a machining tool for machining a workpiece, and displaying a tool used in the machining program with reference to the information. Is preferred.

  According to the above method, when the NC machining program is created, the tool used for machining is displayed. Therefore, the tool can be prepared according to the display, and the machining operation can be quickly prepared.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a flowchart showing a flow from creation of a machining program according to an embodiment of the present invention to start of machining with an NC machine tool.
(1) For example, combining numerical data representing the shape and size of a cone and machining conditions accumulated for each shape to be machined, such as a cone shape, for example, a machining method and a moving direction of a tool Thus, a plurality of shape machining programs divided by the shape to be machined and the machining method are created (step S1).
(2) A machining program for performing turning and milling is created by combining at least two shape machining programs (step S2).
(3) The machining program is transmitted to the NC machine tool (step S3).
(4) The NC machine tool starts machining according to the received machining program (step S4).

FIG. 2 is a diagram showing an outline of a machining program creation procedure. The machining program 23 is a program for operating the NC machine tool 30, and the machining process is determined using the shape machining program creation process 10 for creating the plurality of shape machining programs 15 and the plurality of created shape machining programs 15. The machining program creating step 20 for creating the machining program 23 is provided.
The shape machining program creation step 10 corresponds to step S1 in FIG. 1, and creates a plurality of shape machining programs 15 from the shape from the CAD 11, information on dimensions, and information on machining conditions accumulated in the database 40.
In FIG. 1, the machining program creation step 20 corresponds to step S <b> 2, and includes a plurality of shape machining programs 15, information on the shape, material, and quantity from the CAD 11 and information on machining pattern conditions stored in the database 50. A machining program 23 is created.
The created machining program 23 is transmitted to the NC machine tool 30 via, for example, a network (corresponding to step S3 in FIG. 1).
The CAD 11 is, for example, a three-dimensional CAD that designs mechanical parts. The database 40 is a database for computer-aided production (CAM) in which machining conditions by turning or milling and tool data used for machining are accumulated, for example.
The NC machine tool 30 has, for example, two main spindles, a high-speed main spindle and a main spindle, and the table can also have two spindles, a first turning table and a second turning table. In addition, it is a machining center that can perform turning and milling in a single piece without removing the workpiece, and is used for processing exterior parts of watches.
The database 50 includes, for example, information such as the selection processing of the high-speed main spindle and the main spindle used for the NC machine tool, the selection processing of the use tables for the first and second turning tables, and the like in the machining process determination processing 22 described above. Information on a machining pattern for selecting the most suitable machining from machining pattern conditions from a plurality of shape machining programs 15 is accumulated.
The machining pattern has different machining operations depending on conditions such as a spindle and a table used for machining in the NC machine tool, and a machining method between turning and milling. These are different machining operations under each condition.

Here, the case where the shape C formed by combining the shape A generated by turning and the shape B generated by milling is described below. The shapes A, B, and C are not shown.
In the shape machining program creation step 10, a shape pattern (shape A) that can be generated by turning by the shape pattern extraction process 13 and a shape pattern that can be generated by milling for the machining shape model (shape C) designed by the CAD 11. Since the information related to the tools necessary for the shape machining is accumulated in the database 40, the shape A and the shape B are obtained by the tool selection process 16 and the machining condition extraction process 14. The most suitable machining condition is extracted from the machining conditions stored in the database 40 for the shape pattern. Also, numerical values such as dimensions necessary for processing are extracted from the CAD 11 for the extracted shape patterns (shape A and shape B) by the numerical data extraction processing 12. By the above processing, the shape machining program 15 for machining the shape A and the shape B is created.
Further, the tool selection processing 16 creates a tool list 17 to be used in the created shape machining program 15 and attaches it to the shape machining program 15. In this case, a tool list 17 for machining the shape A and a tool list 17 for machining the shape B are created and attached to the respective shape machining programs 15.

  Next, in the machining program creation step 20, a shape machining program selection process 21 is performed based on information on the shape of the part to be machined, the material to be machined, and the quantity to be machined obtained from the CAD 11. That is, a shape program 15 necessary for shape processing is selected from the above-described information obtained from the CAD 11 from among the plurality of shape processing programs 15 created in the shape machining program creation step 10 described above. In the present embodiment, as the shape program 15 to be selected, the shape program 15 for the shape A and the shape program 15 for the shape B are selected according to the shape to be processed (shape C). Next, the machining process determination process 22 selects the processing pattern that calls the two selected shape machining programs 15 in the order of the machining process, or selects the most suitable machining pattern from the machining pattern conditions from the database 50. The NC machine tool 30 A processing program 23 that can be executed by the NC machine tool 30 is created by describing a process for instructing an operation for performing shape machining. Here, the operation for carrying out the shape machining includes, for example, an instruction to switch the machining method, a rotation control instruction for the drive axis of the NC machine tool 30, a positioning control instruction for the drive axis, a tool change instruction, and the like. Further, the machining step determination processing 22 creates all tool lists 25 used for machining by the NC machine tool 30 using the machining program 23 from the information of the tool list 17 attached to the shape machining program 15 described above. To do. The machining step determination process 22 also has a check function that prevents the machining operation from exceeding the limit value of the operation specifications of the NC machine tool 30 when creating the machining program 23.

  By transmitting the machining program 23 to the NC machine tool 30 and performing machining with the NC machine tool, the shape A is generated by turning, and then the shape B is continuously generated by milling. Thus, a shape C in which the shape A and the shape B are combined is generated.

As described above, according to the embodiment described above, the following effects are obtained.
(1) In the machining program creation step 20, the machining pattern to be machined by the machining step determination process 22 is selected from machining pattern conditions stored in the database 50, and the NC machine tool 30 is shaped. In order to create a machining program 23 that can be executed by the NC machine tool 30 by describing a process for instructing an operation for carrying out machining, it is possible to save the trouble of newly creating a machining operation corresponding to each machining pattern condition. Programs can be created efficiently and without mistakes.
(2) The NC machine tool 30 capable of turning and milling can perform shape machining by reading the created machining program 23, and can be programmed on a computer integrated with the NC machine tool 30. Since there is no need to combine or modify the operation, the operating efficiency of the NC machine tool can be improved.
(3) Since all tool lists 25 used in the machining program 23 are also created, it is possible to quickly prepare a tool before machining with the NC machine tool 30.

It should be noted that the present invention is not limited to the above-described embodiments, and modifications, improvements, etc. within a scope that can achieve the object of the present invention are included in the present invention.
For example, in the above embodiment, the created machining program 23 may be transmitted by a recording medium instead of being transmitted to the NC machine tool 30 using a network.

The flowchart which shows the flow after creating a machining program until it starts machining with an NC machine tool. The figure which shows the outline of the preparation procedure of a process program.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Shape processing program creation process, 11 ... CAD, 12 ... Numerical data extraction process, 13 ... Shape pattern extraction process, 14 ... Processing condition extraction process, 15 ... Shape processing program , 16 ... Tool selection process, 17 ... Tool list, 20 ... Machining program creation process, 21 ... Shape machining program selection process, 22 ... Machining process determination process, 23 ... Machining program 25 ... All tool lists, 30 ... NC machine tools, 40 ... Machining condition database, 50 ... Machining pattern condition database

Claims (2)

A method for creating a machining program for NC machine tools capable of turning and milling,
Creating a plurality of shape processing programs for processing the shape by associating the processing conditions accumulated for each shape to be processed with numerical data representing the shape;
A step of creating a machining program by combining two or more of the plurality of shape machining programs in order to obtain a shape to be machined by performing turning and milling with the NC machine tool. How to create a machining program. The method for creating a machining program according to claim 1, further comprising a step of displaying information on a machining tool for machining a workpiece, and displaying a tool used in the machining program based on the information. A method for creating a machining program.

Images