JPH01210250A - Skip position control device - Google Patents

Abstract

PURPOSE:To manually operate machine tool to obtain correction data by providing tool moving means for manually moving a tool, detecting means for detecting the tool movement position as a skip signal, stop control means for stopping the movement of a tool according to the skip signal and storage means. CONSTITUTION:For example, in case of tool length measurement using the actual tool length as a tool correction amount, first a machine is moved to a tool change position. Secondly, a manual handle feed mode or a manual continuous feed mode is selected. Previously, the distance between the reference measuring surface and a measuring surface is set to install a tool at a spindle position. The tool is brought into contact with a touch sensor 8 placed at a position corresponding to a work or a reference block by manual handle feed. Concerning the respective tools, similarly a skip signal until it contacts the touch sensor 8 is detected and a machine position is stored, whereby a measured value is read in a user's program formed by ladder or pascal, or the measured value is shown to an operator by CRT/MDI.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a skip position control device and a method for inputting program correction data used when measuring tool data attached to a machine tool before starting machining. .

(Prior art) In a normal NC machine tool, the control program is automatically corrected according to the tool used, and even when the same program is used for machining with different tools, accuracy is not reduced. The workpiece is processed. For this purpose, prior to the start of machining, correction data is stored in the internal memory of the NC using a setting means such as a key switch for manual data input, and the amount set in this memory is programmed by the tape command. I am trying to expand and contract the distance traveled. A CNC device having such a tool correction function is generally capable of correcting not only the tool length but also the tool diameter, tool position offset amount, workpiece origin offset amount, and the like.

(Problem to be Solved by the Invention) This method of correcting tool data in conventional CNC devices is carried out during setup work before machining according to the optimal procedure determined by the machine manufacturer for each machine tool. . Therefore, machine manufacturers and end users have been demanding a method for performing manual measurements in a manner that allows the know-how related to various manual measurements to be easily incorporated into the software of the CNC device that controls the machine tool.

However, the functions such as the tool correction amount direct input function and the tool length/workpiece origin measurement function that conventional CNC devices have,
Because the series of procedures for obtaining various measured values was fixed, there was a problem in that it was impossible to change them and set measurement functions specific to the machine tool.

The present invention was made to solve the above problems, and
It is an object of the present invention to provide a skip position control device and a method for inputting program correction data that can measure tool data and obtain program correction data by manually moving a machine tool.

(Means for Solving the Problem) According to the present invention, in a skip position control device that manually moves a tool attached to a machine tool and measures tool data, a tool moving means that manually moves the tool; The tool is equipped with a detection means for detecting the tool movement position as a skip signal, a stop control means for stopping the movement of the tool in response to the skip signal, and a storage means for storing the movement direction and the machine position when the movement is stopped. It is possible to provide a skip position control device with the following characteristics.

(Function) According to the skip position control device of the present invention, the movement command is ignored until the skip signal is turned off with respect to the movement direction stored in the skip position control device, and the machine is moved by the movement command in the opposite direction. The machine position can be transmitted to a user program for machine tool control and an operator at a predetermined timing, and the program can be corrected.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a schematic configuration of the skip position control device, which includes an automatic feed control processing section 1 that decodes commands from a command program 2 and forms pulse distribution commands, etc. A CN including a servo control unit 3 that servo-controls each axis servo motor 4 of the machine tool based on movement commands.
In device C, the skip position is set to P by the following configuration.
It is possible to send it out as a user program stored in the MC or as a signal readable by an MMC or the like. That is, an update processing section 5 updates the commanded machine position from a movement command for each axis from the automatic feed control processing section 1, and a skip position (
A position index processing unit 6 that determines the machine position), a manual skip control processing unit 7 that processes the skip signal from the touch sensor 8 that detects a skip signal due to the movement of the tool, and a movement prohibition command generated by the manual skip control processing unit 7. The manual feed control processing section 9 outputs a manual feed signal to the servo control section 3 based on the following.

FIG. 2 is a diagram illustrating the relationship between the MMC (Man Machine Controller) 11 and the PMC (Programmable Machine Controller) 12 when considering the above-mentioned CNCl0 from the functional aspect of the tool correction function. The function of the MMCII is to control the interface between the control device and the operator, to which a terminal device such as a CRT/MDI is connected. Further, various machine tools are connected to the PMC 12, and the PMC 12 has auxiliary control functions for machining, including tool exchange, spindle rotation speed control, workpiece exchange control, and the like. Both the MMC II and the PMC 12 are integrated with the CNC via a window.

This PMC 12 is supplied with information about the skimp position from the position indexing processing section 6, and this PM
C12 supplies the manual feed control processing section 9 with a mode selection signal M, a feed speed command signal (2), a moving axis and a moving direction command signal C, and the like.

Here, for example, the procedure for measuring a tool length using the actual tool length as the tool correction amount will be explained. First, the machine is moved to a tool exchange position by a manual reference point return operation or the like.

Next, the mode of manual handle feed or manual continuous feed is selected, and a switch on the machine-side operation panel is turned on to notify the control device that the tool length correction amount is to be measured. When this switch is turned on, the PC side changes the tool length correction amount measurement mode signal from "low" to "high J".
Switch to . Then, the control device automatically switches the CRT screen to a screen for measuring the tool length correction amount, and notifies that measurement preparations are complete.

The distance from the reference measurement surface to the measurement surface is set in advance, the tool for which tool length correction is to be performed is selected, and the tool is set at the spindle position. Then, by manual handle feeding, the tool is brought into contact with the touch sensor 8 located at a position corresponding to the workpiece or reference block.

By similarly detecting the skip signal until contact with the touch sensor 8 for each tool and memorizing the machine position, the measured value can be read in a user program consisting of a ladder or Pascal, or a CRT/MDI
This makes it possible to show the measured values to the operator.

In this way, while manually moving a tool set in a machine tool, it becomes possible to apply manual measurement capabilities corresponding to a command program for the tool, including know-how developed independently by the machine manufacturer or the end user.

In the above explanation, we talked about measuring the amount of correction for the tool length, but in the same way, you can easily manually measure the tool diameter, tool position offset amount, workpiece origin offset amount, etc. during pre-machining setup work using a touch sensor. can be measured. That is, this invention has been described here in some detail with respect to its most preferred embodiment, but the description of the preferred embodiment is limited to variations in the detailed structure and the spirit of the invention described in the claims. It is clear that various modifications or combinations thereof may be made without departing from the scope.

(Effects of the Invention) As explained above, according to the present invention, the manufacturer of the machine tool or the user independently manually reads the skip position and performs optimal correction for the CNC device. It is possible to provide a skip position control device that can perform the following steps.

4. Brief Description of the Drawings - Fig. 1 is a block diagram showing an example of the rod of the present invention, and Fig. 2 is a block diagram illustrating the tool correction function of the CNC device.

5... Update processing unit, 6... Position determination processing unit, 7
. . . Manual skip control processing section, 8 . . . Touch sensor, 9 . . . Manual feed control processing section.

Patent applicant: FANUC Corporation Representative Patent Attorney Minoru Tsuji

Claims (3)

[Claims] (1) A skip position control device that measures tool data by manually moving a tool attached to a machine tool, which includes a tool moving means for manually moving the tool, and a detection means for detecting the tool movement position as a skip signal. A skip position control device comprising: stop control means for stopping the movement of the tool in response to the skip signal; and storage means for storing the direction of movement and the machine position when the movement is stopped. (2) The skip position control device according to claim 1, wherein a touch sensor is used as the detection means. (3) With respect to the movement direction stored in the skip position control device according to claim (1), the movement command is ignored until the skip signal is turned off, and the machine is moved by a movement command in the opposite direction to a predetermined direction. The machine position is transmitted to the user program for machine tool control and the operator at the timing of
A method for inputting program correction data characterized by performing program correction.