JP2002055706A - Numerical controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that it is impossible to widen a cutting range to the maximum since a work on a rotary table interferes with an NC machine tool at the time of moving a basic shaft or rotating a B shaft in the conventional numerical controller of an NC machine tool, and that it is necessary to change interlock data according to the angle of the B shaft even at the time of performing interference check by interlock or the like in order to prevent such interference. SOLUTION: The movable range of a basic shaft fluctuating based on the shape of a work is preliminarily set for each angle of a B shaft as interference data, and the specific basic shaft interference data corresponding to the angle of the B shaft are selected, and the data are set at the basic shaft.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to three linear feed axes whose basic axes of X, Y, and Z axes are orthogonal to each other;
The present invention relates to a numerical control device for controlling an NC machine tool having a B-axis rotary feed axis that rotates around an axis.

[0002]

2. Description of the Related Art FIG. 1 shows three linear feed axes according to the present invention in which the basic axes X, Y and Z are orthogonal to each other, and a rotary feed axis B which rotates about the Y axis. Conventional NC having
1 shows an example of a machine tool (hereinafter referred to as “the machine”). With this machine, when cutting a work by placing it on the revolving table (1),
When the angle of the B axis (2) is changed, there is a possibility that the workpiece and the machine may interfere depending on the shape of the workpiece. Further, when the X axis (3), the Y axis (4), and the Z axis (5) are moved, there is a possibility that these basic axes may collide with the workpiece. In order to solve these problems, an interference check is performed using an interlock or the like.

[0003]

As described above, in the conventional numerical controller for controlling the machine, when the B-axis (2) is rotated to perform cutting from multiple directions, or when the basic axis is moved. In order to avoid interference with the workpiece, the interlock is checked using an interlock. However, even if the interlock is performed, it is necessary to change the interlock data every time depending on the angle of the B axis (2). Was.

The present invention has been made in order to solve such a problem, and even if the basic axis is moved or the B axis is rotated, the work on the swivel table does not interfere with the machine. An object of the present invention is to provide a numerical control device capable of maximizing a cutting area.

[0005]

According to the present invention, a range of movement of a basic axis, which fluctuates depending on the shape of a workpiece, is set in advance as interference data for each angle of the B axis, and a unique range corresponding to the angle of the B axis is set. The present invention relates to a numerical controller having a function of selecting basic axis interference data and setting the data as a basic axis. The object of the present invention is to provide a B-axis angle detecting means for detecting an angle of a B-axis; Interference data storage means for storing basic axis interference data, interference data selection means for selecting interference data corresponding to an angle from the interference data storage means, and interference data for setting the selected interference data to the basic axis. This is achieved by providing setting means and interlock executing means for preventing the basic axis from entering a position deviating from the interference data.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a block diagram showing a processing procedure of a numerical control device in which the present invention is implemented by the machine shown in FIG. Angle-based interference data corresponding to the angle of the B-axis (2) detected by the B-axis angle detector (11) is selected from the angle-based interference data storage unit (13) by the angle-based interference data selection unit (12). And the basic axis interference data setting unit (1
4), the unique interference data corresponding to the angle of the B-axis (2) for turning the turning table (1) is X
The basic range of the axis (3), the Y axis (4), and the Z axis (5) is set and the movement range is obtained. When a part program is selected and executed, an axis movement command and a target point from the program analysis unit (15) are calculated as a movement amount for each axis cycle in the function generation unit (16). In the program analysis unit (15), when there is an axis movement command, if the target value is out of the range of the basic axis interference data setting unit (14), the interlock execution unit (17) executes the interlock of the axis movement. Do.

Next, an operation example of the present invention will be described with reference to the flowchart of FIG. In the present invention, first, it is determined whether or not the machine equipped with the numerical controller has the B-axis specification (step S1). For the B-axis specification, the program analysis unit (1
5) It is determined whether or not the program analyzed is an axis command [step S2]. If the command is an axis command, it is determined whether or not interference data is set in advance in the angle-based interference data storage unit (13) (step S3). If so, the angle of the B-axis (2) is obtained from the B-axis angle detector (11) [Step S4], and the interference data corresponding to the angle is transferred to the basic-axis-specific interference data setting unit (14) [ Step S5]. At this time, the axis command is a movement command for the X axis (3), the Y axis (4), and the Z axis (5) [Step 6]. If the target value is outside the range of the interference data [Step 7], the target value Is changed to the maximum value or the minimum value of the interference data to limit the movement range [Step 8]. If the axis command is a B-axis rotation command [Step 9], and the interference data of the target value is out of the range of the basic axis [Step 10], an alarm is issued [Step 11].

[0008]

As described above, in the present invention, the X-axis and the Y-axis are used to prevent the work on the turntable from interfering with the machine.
The interference data to be set for each of the basic axes of the axis and the Z-axis is held in accordance with the angle of the B-axis for turning the turning table, and the X-axis, Y-axis, and Z-axis are selected by selecting appropriate interference data for each angle.
The range of movement of the shaft can be maximized in the cutting area without collision between the workpiece and the machine.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of an NC machine tool embodying the present invention.

FIG. 2 is a block diagram showing processing means of the present invention.

FIG. 3 is a flowchart showing a processing procedure of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 swivel table 2 B axis 3 X axis 4 Y axis 5 Z axis 11 B axis angle detector 12 Angle-specific interference data selection unit 13 Angle-specific interference data storage unit 14 Basic-axis interference data setting unit 15 Program analysis unit 16 Function generation unit 17 Interlock execution unit

Claims (1)

[Claims] 1. An NC machine tool having three linear feed axes whose basic axes X, Y, and Z are orthogonal to each other and a rotary feed axis of a B axis that rotates around the Y axis. In the numerical controller, a B-axis angle detecting means for detecting the angle of the B-axis, an interference data storing means for storing basic axis interference data for each angle, and an interference data corresponding to the angle are selected from the interference data storing means. Interference data selecting means, interference data setting means for setting the selected interference data to the basic axis, and interlock executing means for preventing the basic axis from entering a position deviating from the interference data. A numerical controller characterized by the above-mentioned.