KR100312629B1 - Automatic Tool Offset System for CNC Machine - Google Patents

Abstract

The present invention relates to a tool measuring machine for CNC equipment, and to an apparatus for measuring the dimensions of a tool in CNC equipment. The present invention transmits the electrical contact signal by the photocoupler 19 to the CNC controller by the contact of the tool by the probe (1) and (1 ') in the vertical axis direction and the horizontal axis direction, and by the macro program of the CNC equipment This is a measurement system that automatically calibrates new measurement information after measuring using tool compensation information, and shock reduction by contact of CNC tool is made by buffering action by compression spring (6) which supports the support shaft (2). It is a structure to maintain the cleanliness of the measurement site by injecting high pressure air into the hole (H) to remove chips and foreign substances generated during processing.

A feature of the present invention is a tool compensation system for CNC equipment that can measure two axial distances of a tool used in CNC equipment, and can reduce errors during measurement because the measurement is performed on the actual CNC equipment. .

Description

Automatic Tool Offset System for CNC {Automatic Tool Offset System for CNC Machine}

The present invention relates to a tool measuring machine used in CNC equipment.

In the tool measuring method used in the conventional CNC equipment, the tool pre-setter used in the CNC equipment group is used to measure the tool size in the tool room and input the tool information to the CNC equipment. In the case of the center, there is a problem that the tool compensation value must be changed by measurement after the operator's test work due to the mismatch of the clamping force of the tool and the G / A line.

In addition, in the case of the height pre-setter used for machining centers, only one axis can be measured, and since it is measured in the stationary state of the equipment, it is impossible to measure according to tool characteristics and mechanical characteristics during cutting. There is a problem of low measurement accuracy, and the automatic tool compensation measuring instrument relies on the import of the whole quantity due to the increase of the automation equipment such as FMS. Due to the complicated structure of the expensive equipment there is a difficult problem of application.

The present invention, as a result of earnestly examining to solve the problems of the prior art, if the measurement can be performed in the CNC equipment used to increase the measurement accuracy, the selection of a method for detecting the correct tool measurement point and automatic correction to the CNC controller To solve the problem of the shock absorber caused by the impact of the tool during the development and measurement of the program, it is to provide a tool compensation system for CNC equipment that enables the stability and accurate measurement of the measurement characteristics.

1 is a front view showing the main portion of the tool compensation system according to the invention

2 is a right side view of the tool compensation system according to the present invention.

3 is an electrical circuit diagram of a tool compensation system according to the present invention.

4 is a pneumatic circuit diagram of a tool compensation system according to the present invention.

<Description of Symbols for Major Parts of Drawings>

1, 1 ': probe 2: support shaft 3: rotation ball 4: support washer 5: upper body 6: compression spring 7: upper and lower insulation plate 8: lower body 9: base 10: bolt insulator 11: hexagon head bolt 12: Hexagon head bolt 13: Terminal 14: Half union 15: Air hose 16: Connecting wire 17: Light emitting diodes 18, 18 ': Resistance 19: Photocoupler 20: Solenoid valve

As illustrated in FIGS. 1 to 4, the probe 1 has a planar shape for measuring the length of the tool, and the probe 1 'is designed to measure the radius of the tool. Compression spring 6 is installed in the support washer 5 to restore the deformation of the probe by the upper side, and the upper and lower insulation plates 7 are installed to maintain the insulation characteristics of the upper body 5 and the lower body 8 and The high pressure air supplied through the hose 15 is injected through the hole H to remove foreign substances. In the case of the vertical machining center, the tool compensation system is fixedly installed on the table surface, and then the position of the probe 1 is The light emitting diode 17 is used to calculate the Z-axis position, and the position of the probe 1 'is also measured to input the positions of the tool compensation system to the tool-measurement macro program for the positions of the X and Y axes.

When the working tool (T) is mounted on the spindle of the machining center during the operation, and the preparation function that requires tool measurement in the working program is executed, the macro program is called and the length is measured while the tool (T) is reversed. In the case that the electric contact position is detected while conducting by feeding at the speed specified in the program to the probe 1, the position of the CNC controller is recognized by the light-receiving part of the photocoupler 19, and the tool calibration of the CNC equipment is automatically executed. After completing the process and return to the working program, the next machining can be performed.

This automatic correction system is provided with the upper and lower insulating plates (7) to maintain the insulating properties of the upper body (5) and the lower body (8), the tool (T) and the resistance to the conductive body of the installed CNC equipment Probe (1) (1 ') can detect the exact contact point through the role of switch and recognize the conduction state to CNC equipment using photo coupler to prevent controller damage caused by external disturbance.

In addition, when the high-pressure injection auxiliary function M code of the CNC program is executed, the solenoid valve 20 is operated through the relay operation of the CNC controller so that a high pressure injection can be made in the hole (H).

As such, the present invention can accurately measure the dimensional information of the tool (T) in the CNC equipment, thereby improving measurement accuracy and enabling rapid measurement, and it is inexpensive compared to existing tool pre-setters or imported automatic tool measuring devices. You can make it at cost.

In addition, the measuring device used in the existing CNC equipment can measure one axis, but the measuring device of this tool can measure the two axis tool, and the measurement accuracy is superior to the imported automatic tool compensation device.

In some cases, this measuring device can be installed in the tool attachment part of the machining center to be used as a product measurement probe of the workpiece of the conductor, thereby increasing the technical ripple effect.

Claims (1)

The compression spring 6 is mounted in the probe (1) 1 'for measuring the length and radius of the tool for impact relief by the contact of the tool T, and the rotation for smooth restoration and return to the original position. The ball (3) is installed, and in the case of the initial setup, the position of the tool compensation system can be measured by intermittent light emission of the light emitting diode (17), and the tool wear or damage is measured by the tool compensation G code in the CNC program. , The high-pressure air injection hole (H) is processed to remove the foreign matter, the tool and the probe (1) (1 ') acts as an electrical switch to measure the two-axis dimension of the tool is automatically corrected Tool compensation system for CNC machines.