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HOW TO MEASURE THE SURFACE ROUGHNESS OF THE WORKPIECE?
Author:管理員 ?? Posted on:2019-04-11 16:41:50 ?? Text:【Big】【Medium】【Small】Browse (3677)
Summary:Surface roughness is a microscopic geometric error. Commonly used instruments include image measuring instruments, light-cutting microscopes, interference microscopes and electric profilometers.

Surface roughness is a microscopic geometric error. Commonly used instruments include image measuring instruments, light-cutting microscopes, interference microscopes and electric profilometers. Suzhou Ligao Testing is a manufacturer of optical instruments and microscopes. We will mainly introduce how to measure the surface roughness of workpieces using these two instruments. Mainly divided into the following ways:
     1. Impression method: using paraffin wax, low melting point alloy or other impression material, imprinted on the surface of the part to be tested, and indirectly measuring the roughness of the surface to be tested under the microscope. This method is suitable for bulky parts and internal surfaces.
     2. Comparison method: The surface to be tested and the surface roughness sample are directly compared by the imager, and are mostly used in the workshop to evaluate the workpiece with a large surface roughness value.
     3. Interference method: It is a two-dimensional measuring instrument that uses the principle of light wave interference and measures with an interference microscope.
     4, light cutting method: the measuring instrument uses the principle of light cutting, measured with a double tube microscope. Commonly used to measure Rz is 0.5~60μm.
     5, needle drawing method: refers to the second element using the stylus directly on the surface to be measured gently across, to measure the surface roughness.


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