Universal tool microscope digital transformation

Universal tool microscope to measure parts length, angle, thread and other geometric parameters, is to use a test instrument most length measuring, all types of enterprises, so it is widely used in mechanical processing industry. But with the development of modern industry and the progress of science and technology, the traditional old-fashioned univesalmeasurement machine has been difficult to meet the requirements, so it is necessary to carry out technological transformation. The JX7 is the most commonly used universal tool microscope as an example, introduces the digital technology transformation of universal tool microscope.

A, digital display system retrofit

According to the application of grating, magnetic grid users for many years in the equipment and the experience of ball grid digital display system, comparing the characteristics of different systems and the performance and accuracy of detection, choose the KG1 type of high precision grating digital display system. The system has high precision, good stability, good reliability and simple installation, convenient debugging, environmental requirements is not high, suitable for the transformation of universal tool maker's microscope.

According to the measurement range of JX7 type universal tool-microscope as ordinate, the abscissa 200mm 100mm, select the WTA 200mm measurement range and measurement range of 100mm two grating; selection of WE6800-2 type two-axis digital display meter ( minimum resolution of 0.2μ m ), it has a sensor interface, with the WTA type original measurement sensor matching.

Two, digital display system installation

Due to the installation of digital system must be carried out without affecting the original optical system of the instrument, so the figure 1 installation scheme: 250mm long magnetic ruler is installed on the longitudinal guide rail on the right side (left side is the glass scale instrument original ), because of the installation position to limit the right to be provided with a supporting block, to the right fixed grating; 100mm grating is arranged on the guide rail petition (Fig. 1B ). In accordance with the instructions on the installation technology, the two ruler of installation and adjustment to the longitudinal, transverse guide the direction of movement ( horizontal and vertical ) in parallel, the parallelism of <0.1mm ( can be conveniently adjusted to within 0.05mm is normally installed ).

Debugging three, digital display system

Debugging ordinate: remove the glass table with longitudinal guide rail, 3 gauge blocks at both ends of a block 200mm block attachment research respectively 10mm, mounted in the longitudinal rails scraping surface ( see Figure 1 block placement office ), and the grating ruler is arranged in the same line, in order to reduce the Abbe error. And then installed on one end of the lateral sliding metering instrument sensor on measuring head and block contact, the digital display meter counting began, the other end contact and move the longitudinal guide rail so that the sensor probe and gauge block, in the digital instantaneous contact surface stop counting and maintain data. Digital display meter difference value difference actual size and gauge block is digital display system. If the difference is less than 3μ m need not be modified, if more than 3 μ m according to the difference in size through the error compensation system of digital meter linearity compensation, numerical error can be less than the specified or even close to zero.

Test four, digital display system

According to the relevant provisions of the universal tool maker's microscope verification regulation of verification, need reading device, showing the value of the return error error, reading device, and the indication error.

( 1 ) value error verification reading device

The digital display system, reading device shown value error is the minimum resolution digital meter, which is± 0.5 μ m, without a check.

( 2 ) verification error reading device (repeatability corresponds to the magnetic grid ruler )

Grating ruler reading device on its structure and principle is not the return error, of course it needs a very high level of assurance process. Through the inductance micrometer with 0.1 μ m repeated testing, grating ruler reading device to return the maximum error is less than 0.5 μ M.

( 3 ) calibration error ( accuracy of equivalent magnetic grid ruler )

Verification of limit error is less than 0.5μm glass scale as the standard, in accordance with the rules of longitudinal, transverse conditions respectively for verification; if there is no glass scale, available universal tool-microscope original rule and grating ruler comparison test, and the error is modified by the instrument the original value, to determine the grating ruler was the actual error check, if there is a super compensation difference and linear compensation system.