JPH11212613A - Numerical controller provided with mirror cutting function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable mirror cutting while using a common turret through simple programming. SOLUTION: When a single working program command is analyzed by a program analytic part 2 and a working mode is a mirror cutting mode, based on the above single working program, the execution data of respective main shafts are generated by an execution data generation part 3 and both these execution data are executed to the respective main shafts by respective program executing parts 6 and 7. According to the single working program command, mirror cutting is enabled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a numerical control apparatus, and more particularly to a numerical control apparatus having two spindles having the same machining capability and having a function of simultaneously performing mirror machining of two workpieces by a single control system. About.

[0002]

2. Description of the Related Art In a turning machine, two spindles may be mounted on one machine. The purpose of the turning machine is to provide a machine configuration that can easily combine processes when a plurality of machining processes are required. is there. However, different processing steps are not required for all the processing, and common processing is often performed in the pre-process and the post-process. FIG. 4 is a diagram showing a pre-process. The first spindle (2
Processing of one of the workpieces (23) gripped in 2) is performed. FIG. 5 shows that the work (23) gripped by the first spindle (22) is connected to the second spindle (2) for the connection of the pre-process and the post-process.
It is a figure showing operation which transfers to 4). Second spindle (24)
Moves to the first spindle side to transfer the work. FIG. 6 is a diagram showing a post-process.

The unprocessed side of the work received on the second spindle is machined by a tool (25). As described above, the processing at both ends of the work is performed separately in the pre-process and the post-process.

[0004]

In this conventional apparatus, even when the common processing is performed in the pre-process and the post-process, the post-process must be performed after the pre-process, and the processing time required for cutting is required. However, there is a problem that the time required for adding the pre-process processing time, the work delivery time, and the post-process processing time is required, so that efficient processing cannot be performed.

[0005] As another conventional numerical control device, there is known a device capable of performing superimposition processing by an inexpensive one-system control device having no superimposition control function. As such a numerical control device, there is Japanese Patent Application Laid-Open No. Hei 7-185901. In this device, a distribution command for distributing a commanded combined feed speed to a feed speed of each spindle in accordance with a ratio of a moving amount of a plurality of spindles, Movement command of at least one spindle for machining a work held on one spindle, movement instruction of at least one other axis for machining a work held on a second spindle, and feed of each of those axes The feed combined speed calculated from the speed by a predetermined feed speed combining rule is reflected in the machining program. Therefore, according to this conventional apparatus, the workpiece held on the first spindle and the workpiece held on the second spindle can be overlapped. However, even in such a conventional apparatus, there is a problem that the machining command is created for each work when the program command is created, and the programming at this time is complicated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to simultaneously process each step by simple programming when performing common processing in a pre-process and a post-process. An object of the present invention is to provide a numerical control device capable of performing efficient machining by halving time.

[0007]

SUMMARY OF THE INVENTION According to the present invention, in a machining process, machining in a pre-process and a process in a post-process are respectively performed by different main shafts, and at least one main shaft can be moved relative to the other main shaft. An object of the present invention is to provide a numerical control device for a turning machine having a simple mechanism and a common turret for machining a first spindle and a machining of a second spindle so as to have a left-right symmetric positional relationship. Two tools, and a relative positional relationship between a first spindle-side work and a first spindle-side tool formed by a first spindle and a turret; and a second spindle-side work and a second spindle formed by a second spindle and a turret. The axis movement control is performed so that the relative positional relationship between the side tools is the same, and the control is also performed such that the main spindle rotation and the auxiliary operation are the same between the two main spindles.

The program command system is the same as the single-system command system. In the mirror cutting mode, the first spindle-side coordinate system is executed by the execution data creating unit based on the single-system data analyzed by the program analyzing unit. Execution data and the second
Internally automatically generates execution data of the spindle-side coordinate system. By the above means, the pre-process and the post-process can be simultaneously performed by simple programming, and the processing time can be reduced by half.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a block diagram showing a numerical control device according to one embodiment of the present invention. The numerical control device includes a machining program operation buffer (1) for storing a selected program, and a program analysis unit (2) for dividing a program command block read from the machining program operation buffer (1) into individual operation commands for machine control. And an origin offset data storage unit (4) for storing origin data of program coordinates when configuring each coordinate system, and a tool offset data storage unit (5) for storing offset data of various tools mounted on the tool rest. An execution data creation unit (3) that reads commands divided into individual operations by the program analysis unit (2) and creates execution data to be distributed to the program execution unit based on each operation command; ) Is transferred to each feed axis servo control unit (8) and the auxiliary operation control unit (9). It is constituted by Gram execution unit (6) and the second spindle-side program execution unit (7).

FIG. 2 is a diagram showing an example of an operation procedure of the numerical control device for realizing the present invention. First, one block of a program command is read from the machining program operation buffer (1) (step S1). Next, the read program block is analyzed (step S2), and it is determined whether or not the mode is the mirror cutting mode (step S3). If not, it is determined whether the currently selected spindle mode is the first spindle or the second spindle (step S4). In the case of the first spindle mode, an auxiliary operation command for a coordinate system composed of the first spindle and the tool post is executed (step S5), and completion of the operation is confirmed (step S6). When the operation is completed, an axis movement command is issued to the control axis to be controlled in the coordinate system in consideration of the origin offset data and the tool offset data (step S7). Check the movement to the target point specified by the program (step S
8) If the movement to the target point has been completed, the execution of the program block is terminated, and the flow proceeds to reading of the next program block. Similarly, when the second spindle mode is selected instead of the mirror cutting mode, the above steps correspond to steps S5 ', S6', S7 ', and S8', respectively. In the case of the mirror cutting mode in step S3, in both the coordinate system composed of the first spindle and the tool rest and the coordinate system composed of the second spindle and the tool rest, the auxiliary operation command given by the program The execution data creation unit internally generates execution data for both coordinate systems so that the axis movement command is satisfied (step S9). Next, an auxiliary operation command is executed for each coordinate system based on the generated execution data (step S1).
0), the completion of the auxiliary operation in both coordinate systems is confirmed (step S11). When the operation is completed, an axis movement command is issued to each control axis in consideration of origin offset data and tool offset data (step 12), and each control axis is moved to a target point. The completion of the movement to the target point is confirmed (step S13). If the movement to the target point has been completed, the execution of the program block is terminated, and the next program block is read. FIG. 3 shows a machining operation in the mirror cutting mode. In this way, when processing the common shape in the pre-process and the post-process, the pre-process and the post-process can be processed simultaneously by only one processing program command.

[0011]

In the case where the pre-process and the post-process perform the same processing or when the same processing is performed at the same time, it is not necessary to prepare independent programs and perform the processing separately. Two coordinate system machining can be performed simultaneously by a single system program, and the machining time can be reduced by half.

[Brief description of the drawings]

FIG. 1 is a functional block diagram of a numerical control device having a mirror cutting function.

FIG. 2 is an operation flowchart showing an example of a method for realizing the present invention.

FIG. 3 is a diagram illustrating a control operation according to the present invention.

FIG. 4 is a diagram illustrating pre-process processing according to a conventional technique.

FIG. 5 is a diagram illustrating the transfer of a work according to the related art.

FIG. 6 is a diagram illustrating post-process processing according to a conventional technique.

Claims (1)

[Claims] 1. A numerical control device in which a pre-machining and a post-machining in a machining step are machined by different spindles, and at least one of the spindles is positionally movable relative to the other. And a common turret for simultaneously processing the first spindle and the second spindle by mounting two tools, and the relative positions of the first spindle-side work and the first spindle-side tool formed by the first spindle and the turret. Relationship and second
The second spindle side work made by the spindle and turret and the second
A control unit that controls mirror cutting by performing axis movement control so that the relative positional relationship of the spindle side tool is the same, a program analysis unit that analyzes the program command on one side of mirror cutting, and this analysis unit An execution data creation unit that creates execution data for both spindles based on the analyzed data, and a program execution unit that executes the created execution data, based on a single machining program command A numerical controller having a mirror cutting function, wherein mirror cutting is performed by a common turret.