Universal tool microscope can measure the length, angle, thread and other geometric parameters of the part. It is the most used test instrument in length measurement and testing, so it is widely used in various enterprises in the mechanical processing industry. However, with the development of modern industry and the advancement of science and technology, the traditional old-fashioned omnipotent work has been difficult to meet the requirements, so it is necessary to carry out technical transformation. In this paper, the most commonly used JX7 universal tool microscope is taken as an example to introduce the digital display technology modification of the universal tool microscope.
First, the modification of the digital display system
According to the experience of users in the application of grating, magnetic grid and ball grid digital display system in the equipment for many years, compare the characteristics of different digital display systems and select the KG1 high-precision grating digital display system through performance and accuracy detection. The system has the advantages of high manufacturing precision, good stability, good reliability, simple installation, convenient debugging, and low environmental requirements, and is suitable for the transformation of Wangong display.
According to JX7 type Wangong display, the measuring range is 200mm ordinate and 100mm abscissa. KG1 type measuring range 250mm and measuring range 100mm two gratings are selected; the matching GS-2000 two-axis digital display meter is selected (minimum resolution is 0.2) Îœm), it has a sensor interface that can be used with the original KG1 metering sensor.
Second, the installation of digital display system
Since the installation of the digital display system must be carried out without affecting the original optical system of the instrument, the installation scheme shown in Figure 1 is adopted: a long magnetic pole of 250 mm is mounted on the right side of the longitudinal guide rail (the left side is the original instrument) Glass scale), due to the installation position, a support block must be added to the right side to fix the right end of the grating; a 100mm grating is installed on the lateral guide (Fig. 1B). According to the installation technical conditions on the instruction manual, the two ruler mounting bases are respectively adjusted to be parallel with the longitudinal and lateral guide rail movement directions (horizontal direction and vertical direction), and the parallelism is <0.1 mm (normally, it can be easily adjusted during installation). Within 0.05mm).
Third, the digital display system debugging
Alignment of the ordinate: Remove the glass table on the longitudinal rail, and grind a 10mm gauge block at both ends of the 200mm 3 equal gauge block and install it on the longitudinal guide scraping base (see Figure 1). The block is placed so that it is mounted on the same line as the scale to reduce the Abbe error. Then, the measuring sensor probe mounted on the lateral carriage of the instrument is in contact with one end of the measuring block. At this time, the digital display starts counting, and then the longitudinal guide is moved to make the sensor probe contact the other end of the measuring block, at the moment of contact The meter stops counting and keeps the data. The difference between the displayed value of the digital display and the actual size of the gauge is the difference between the digital display system. If the difference is less than 3 μm, it is not necessary to correct. If it is greater than 3 μm, the linear compensation can be performed by the error compensation system of the digital display according to the magnitude of the difference, so that the error is smaller than the specified value or even close to zero.
In the same way, the horizontal coordinate is debugged with a 100 mm gauge block, which will not be described here.
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