JPH08206940A - Numerical control device - Google Patents

Abstract

PURPOSE: To perform manual operation work by using a dimension recorded on a work drawing as it is when cutting work is performed by operator operation using a push button or a pulse handle. CONSTITUTION: A numerical control device is provided with a display control part 13 to display a machine coordinate position on which numerical control is performed when cutting work is performed by operator operation using a push button or a pulse handle, a tool diameter setting part 9 to set a tool diameter correction value, a cutting point setting part 11 to indicate a cutting point of a tool and a correction vector operation part 10 to calculate a correction vector up to a cutting point of the tool from the tool center on the basis of data from the tool diameter setting part 9 and the cutting point setting part 11. When a machine coordinate position is displayed by the display control part 13, it is displayed by adding a result of the correction vector operation part 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a numerical control device having a manual operation function for performing cutting by an operator using a push button or a pulse handle.

[0002]

2. Description of the Related Art In a conventional numerical control device having a manual operation function, the current position display for displaying the coordinate position of a machine to be numerically controlled is output from a position detector for detecting the machine coordinate position or changes momentarily. It was displayed using the position command value. As for the displayed coordinate system, for example, in a machining center, a method of displaying the center position of the main axis as the current position of the coordinate system has been used. Therefore, the display of the current position displays the center position of the spindle as the current position of the coordinate system, so that the operator can recognize the current position is the center coordinates of the tool mounted on the spindle. That is, when the side surface machining of the workpiece is performed according to the dimensions described in the machining drawing by using the tool such as the end mill by the operator operation using the push button or the pulse handle, the cutting point of the tool is displaced by the radius of the tool. Therefore, it is necessary to calculate the position offset by the radius of the tool with respect to the dimension described in the machining drawing, and perform machining using the calculated coordinate position. An example of the conventional technique will be described below with reference to the block diagram of FIG.

A signal of a pulse handle or a manual feed push button used for manual operation machining is input from a pulse handle input unit 1 or an I / O input unit 2. The manual function generation control section 3 generates a position signal for driving the control axis based on the input signal of the pulse handle or the manual feed push button, and the axis drive control section 4 is generated by the position signal.
The control axis motor 5 is driven via. The position detector 6 connected to the control axis motor 5 outputs the machine position every moment and inputs it to the axis drive control unit 4 and the subtractor 8. Then, position feedback control is performed. On the other hand, operation panel 1
An origin offset value for determining the machining origin of the workpiece is set in the workpiece origin setting unit 7 by the operator. The subtracter 8 calculates the machine current position from the machining origin by subtracting the origin offset value from the machine position, and the display control unit 13 based on the result.
Outputs and displays the machine coordinate position on the display unit of the operation panel 14. The origin offset value that determines the machining origin of the workpiece is generally set so that the machine coordinate position becomes zero when the spindle center position is positioned at the machining origin.

[0004]

According to the above-mentioned conventional technique, since the displayed current position becomes the center coordinate of the tool, when the side surface machining of the workpiece is performed according to the dimension described in the machining drawing, It is necessary to calculate a position offset by the radius of the tool with respect to the dimension described in the processing drawing, and perform processing using the calculated coordinate position. For this reason, there is a problem that not only the calculation is required each time, but also the operation is troublesome, and the tool is moved to an incorrect position due to a calculation error, resulting in a defective work piece. In view of the problems of the above-mentioned conventional techniques, the purpose of the present invention is to
It is an object of the present invention to provide a numerical control device capable of performing manual operation machining by using the dimensions described in the machining drawings as they are when performing cutting machining by an operator operation using a push button or a pulse handle.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a numerical control device having a manual operation function for performing a cutting process by an operator operation using a push button or a pulse handle. The above object of the present invention is to achieve the numerical control. The present position display means for displaying the machine coordinate position, the tool radius correction amount setting means for setting the tool radius correction amount, the cutting point designating means for designating the cutting point of the tool, the tool radius correction amount setting means, and Correction vector calculation means for calculating a correction vector from the tool center to the cutting point of the tool based on data from the cutting point designating means, and when the machine coordinate position is displayed by the current position display means, the correction This is achieved by displaying the result of the vector calculation means.

[0006]

In the present invention, when cutting is performed by an operator's operation using a push button or a pulse handle,
Since the display of the current position is displayed at the machine coordinate position of the cutting point of the tool, it is possible to perform the manual operation machining using the dimensions described in the machining drawing as they are.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing a first embodiment of the present invention, which is described in comparison with the conventional technique shown in FIG. To do. Through the operation panel 14, the tool diameter setting unit 9
The diameter of the machining tool is set / stored by the operator. Regarding the setting in the tool diameter setting unit 9, the tool number of the machining tool (not shown) is used to extract and set the tool diameter correction data corresponding to the tool number, and the machining data is set every time the tool is replaced. There is also a method that does not require it. In the cutting point setting unit 11, data indicating the cutting point of the tool set by the operator is set / stored via the operation panel 14. The correction calculation vector calculation unit 10 calculates a correction vector for display based on the cutting point of the tool stored in the cutting point setting unit 11 and the diameter of the machining tool stored in the tool diameter setting unit 9, and sends it to the adder 12. Output. The adder 12 adds the machine current position from which the origin offset value output from the subtracter 8 has been subtracted and the correction vector, and based on the result, displays the machine coordinate position via the display control unit 13 on the operation panel. It is output to the display unit 14 and displayed.

Next, the operation will be described with reference to the flowchart of FIG. 2 showing the operation of the present invention, the table showing the relationship of calculating the machine current position from the correction vector of FIG. 4, and the diagram showing the cutting point selecting operation of FIG. The operation will be described. If the current position display screen is selected on the display screen of the operation panel 14 (step S1), the machine current position (X
(A, YA, ZA) is read (step S2), and the work origin setting unit 7 is operated from the current machine position (XA, YA, ZA).
Origin offset value (Xoff, Yof stored in
f, Zoff) is subtracted to obtain the machine current position (Xa, Ya, Za) from the machining origin (step S3). Next, the cutting point counter Co, which is data indicating the cutting point of the tool stored in the cutting point setting unit 11, is read (step S4), and the cutting of the tool as shown in FIG. 5 is performed based on the cutting point counter Co. A diagram showing points is displayed graphically (step S5). When the cutting point selection key F7 is pressed by the operator through the operation panel 14 as shown in FIG. 5 (step S6), the cutting point counter Co is incremented, and when the value of the cutting point counter Co reaches 9, the cutting point counter Co is set to 9. Co is cleared to obtain a cutting point counter value of 0 to 8 (steps S7 to S9), and again in step S5, a diagram showing the cutting points of the tool is displayed graphically. That is, when the above-described operation is repeated, the filled circle mark displayed in the part of the numbers (0 to 8) on the screen sequentially moves according to the cutting point counter value indicating the cutting point as shown in FIG. Is displayed. Therefore, the operator can image-wise select the cutting point of the tool for the manual processing. Next, the tool radius correction amount D which is the diameter of the machining tool stored in the tool radius setting unit 9 is read (step S10), and the cutting point counter Co is read.
The correction vector (dX, dY) is calculated based on (step S11). The correction vector is calculated based on the cutting point counter values (0 to 8) as shown in the table of FIG. Next, the current machine position (Xa, Y
a, Za) and the correction vector (dX, dY) are added to the machine coordinate position (X, Y,
Z) is calculated (step S12), and the machine coordinate position (X,
(Y, Z) is displayed on the display device of the operation panel 14 (step S13). The above operations of steps S1 to S13 are repeatedly processed while the current position display screen is selected.

A second embodiment of the present invention will be described with reference to the block diagram of FIG. The description of the same parts as those in the block diagram of the first embodiment shown in FIG. 1 will be omitted. A motion direction command used when generating a position signal for driving the control axis performed by the manual function generation unit 3 is stored in the motion direction storage unit 15, and the cutting point setting unit is based on the stored motion direction. The data indicating the cutting point of the tool is set / stored in 11. For example, "1" is set when the X-axis is operated in the positive direction, "1" is set when the X-axis is operated in the negative direction, and the same processing is performed in the Y-axis operation. Hereinafter, the machine coordinate position (X, Y, Z) is displayed on the display device of the operation panel 14 by the same processing as described in the first embodiment.

[0010]

As described above, according to the numerical controller of the present invention, when the cutting operation is performed by the operator's operation using the push button or the pulse handle, the present position is displayed at the machine coordinate position indicating the cutting point of the tool. Therefore, it is possible to perform the manual operation machining using the dimensions described in the machining drawing as they are. Therefore, in the case of manual operation machining, it is not necessary for the operator to calculate the position offset by the radius of the tool with respect to the dimension described in the machining drawing each time, but also the tool is moved to the wrong position due to calculation error and the workpiece It is possible to provide a safe and easy-to-use numerical control device that does not cause defects in the above.

[Brief description of drawings]

FIG. 1 is a block diagram showing a first embodiment of a numerical controller according to the present invention.

FIG. 2 is a flowchart showing the operation of the device of the present invention.

FIG. 3 is a block diagram showing a second embodiment of the device of the present invention.

FIG. 4 is a diagram showing a table showing a relationship for calculating a machine current position from a correction vector by the device of the present invention.

FIG. 5 is a diagram showing a cutting point selecting operation of the device of the present invention.

FIG. 6 is a block diagram showing an example of a conventional numerical control device.

[Explanation of Codes] 9 Tool Diameter Setting Section 10 Correction Vector Calculation Section 11 Cutting Point Setting Section 12 Adder 13 Motion Direction Storage Section

Claims (4)

[Claims] 1. A numerical control device having a manual operation function of performing cutting by an operator's operation using a push button or a pulse handle, and present position display means for displaying a machine coordinate position to be numerically controlled, and a tool radius correction amount. Based on the data from the tool radius correction amount setting means, the cutting point instruction means for instructing the cutting point of the tool, and the tool radius correction amount setting means and the cutting point instruction means, the cutting point of the tool from the tool center Correction vector calculation means for calculating the correction vector up to and including the result of the correction vector calculation means when displaying the machine coordinate position by the current position display means. Numerical control device. 2. The cutting point designating means comprises graphic display means showing the tool center and a plurality of cutting points of the tool, and cutting point selecting means for selecting one of the plurality of cutting points of the tool. The numerical control device according to claim 1, wherein the cutting point of the tool specified by the cutting point selecting means is displayed separately from other cutting points. 3. The cutting point instructing means stores an operation direction moved by an operator's operation using the push button or the pulse handle, and uses an automatic determining means for setting the stored operation direction as a cutting point of a tool. The numerical control device according to claim 1, wherein a cutting point of the tool is designated. 4. The numerical control device according to claim 1, wherein the tool radius correction amount setting means sets using a tool radius correction amount corresponding to a tool number to be machined.