Inspection Content and Methods of Machine Parts
The inspection of machine parts is an important part of the machine maintenance process. The technical condition of machine parts and the technological measures to be taken are determined through inspection. The following is the specific content and method of part inspection.
The main content of machine parts inspection
In machine maintenance, machine parts are generally inspected one by one. The main content can be divided into the following aspects:
(1) Inspection of geometric accuracy of machine basic parts
Geometric accuracy includes dimensional accuracy and shape and position accuracy. However, maintenance work sometimes does not pursue the geometric size of a single part but requires relative matching accuracy, which is often an important part of the inspection work.
The shape and position accuracy commonly used in maintenance include roundness, cylindricity, concentricity, coaxiality, parallelism, and perpendicularity.
(2)Inspection of surface quality
The inspection of the surface quality of the machine's basic parts in the maintenance work is not limited to the inspection of the surface finish, but the inspection of the surface of the used machine parts for defects such as scratches, burns, and roughness.
(3) Inspection of machine properties
According to the characteristics of machine overhaul, in addition to checking the machine properties of machine parts and materials, other indicators are generally not checked, but certain properties encountered during the manufacturing and overhaul of parts, such as balance, springs Stiffness, etc., cannot be ignored.
(4) Inspection of hidden defects
During the manufacturing process of machine precious parts, there may be original defects such as slag inclusions and voids inside, and microscopic cracks may occur during use. These defects cannot be found directly from general observations and measurements, but they may have serious consequences for the machinery. Therefore, in machine overhaul, certain parts must be thoroughly inspected on a purposeful basis.
Method of part inspection
(1)Sensory test method
This is a way to identify the technical status of the parts of the machine without checking the equipment, but relying on the intuitive feeling of the inspector. This method is simple, and it is easier to distinguish the defects of a large number of disassembled parts during machine maintenance. However, this method cannot be used to inspect parts with higher accuracy requirements and requires inspectors to have a richer experience.
(2) Instrument and tool inspection method
A lot of inspection work is carried out with instruments and tools. Due to the different working principles and types of instruments and tools, they can be divided into general measuring tools, special measuring tools, machine instruments and meters, optical instruments, electronic instruments, and so on.
(3) Physical inspection method
This is a method to detect the technical status of parts by using electrical, magnetic, optical, sound, thermal, and other physical quantities through the changes caused by the workpiece. The realization of this method is also combined with the instrument and tool inspection method. This method is usually used to inspect hidden defects inside parts of the machine without damaging the parts themselves. It is commonly called non-destructive inspection. Non-destructive inspection technology has been increasingly developed in recent years, and magnetic particle methods, penetration methods, ultrasonic, and radiation methods are widely used in production.
machine parts are an important part of determining the operation of the machine. Inspection of the machine parts can ensure its machining accuracy and improve its mechanical properties. If you have any doubts about the inspection of machine parts after reading the above content, you can contact us. We will provide you with professional consultation and comprehensive solutions.
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