Image measuring instrument, image measuring instrument, two-dimensional image measuring instrument, automatic image measuring instrument, automatic detection, automatic measuring instrument_What is a tool microscope?

The toolmaker'smicroscope is a universal optical length measuring tool that is aimed at the measuring microscope and can measure in two coordinates. The measuring microscope is also called the main microscope. Its reticle has markings in the shape of a rice-shaped, threaded profile and other shapes for aiming. The tool microscope was developed in the early 1920s and used for thread measurement at the beginning, and the universal tool microscope appeared in the late 1920s. After the 1970s, digital display tool microscopes appeared after the application of grating length measurement technology. In the mid-1980s, there was a tool microscope that applied computer technology to process measured data. Classification and structure tool microscopes are divided into three types: small, large and universal. The common measuring ranges are 50×25 mm, 150×75 mm and 200×100 mm. They all have a measuring microscope and coordinate table that can move up and down along the column. The total magnification of the measuring microscope is generally 10 times, 20 times, 50 times and 100 times. Small and large coordinate workbenches can move longitudinally and laterally. They generally use threaded auxiliary reading drums, reading microscopes or projection screens, and also use digital display. The graduation value is generally 10 microns, 5 microns or 1 microns. The workbench of the universal tool microscope is only moved longitudinally, and the lateral movement is completed by a horizontal sliding frame equipped with a column and a measuring microscope. Generally, a reading microscope, projection screen reading or digital display is used, and the graduation value is 1 micron. There are many accessories for tool microscopes, including various eyepieces, such as threaded profile eyepieces, dual image eyepieces, arc profile eyepieces, etc., as well as measuring knives, optical positioners for measuring apertures, and projectors for projecting and magnifying the measured part. . In addition, the universal tool microscope can also be equipped with an optical indexing table and an optical indexing head. Uses and measurement methods Tool microscopes are mainly used to measure the geometric parameters of threads, the angles of metal cutting tools, the dimensions of templates and molds, etc., and are also commonly used to measure the aperture and hole distance of small workpieces, the taper of cones and the contour size of cams. Wait. The basic measurement methods of tool microscopes are image method and axial cutting method. ① Image method: Use the marking on the reticle in the measuring microscope to aim at one side of the measured length, read from the corresponding reading device, and then move the workbench (or horizontal carriage) to aim at the measured length with the same marking On the other side, take a second reading. The difference between the two readings is the measured length. Figure 2 [Use the image method to measure the size of the sample plate] is the use of image method to measure the l size of the sample. ②Axial cutting method: The measurement process is the same as the image method, but the aiming method is different. When measuring, the markings on the reticle do not directly aim at the two sides of the measured length, but aim at the 3 micron-wide engraved line on the measuring knife tangent to the measured length to improve the aiming accuracy (see thread measurement).