Specifically:
One, cleaning
Application of cleaning fluid and cleaning equipment to clean the parts before assembly, remove the surface of the residual oil, so that the parts to achieve the required degree of cleanliness. Commonly used cleaning methods are dipping, spray washing, gas phase cleaning and ultrasonic cleaning. Immersion cleaning is impregnated with parts in the cleaning fluid shaking or static, cleaning time is longer. Spray washing is to rely on the pressure of the cleaning solution sprayed on the surface of the parts. Vapor-phase cleaning is the use of cleaning fluid heating steam generated on the surface of the parts condensation and will be cleaned of oil. Ultrasonic cleaning is the use of ultrasonic cleaning device to make the cleaning fluid cavitation effect, in order to remove the oil on the surface of the parts.
Two, balance
The application of rotating parts and components balance test machine or balance test device for static or dynamic balance, measure the size and phase of the amount of inequality, with the de-weighting, weighting or adjusting the position of the parts, so as to achieve the required balance accuracy. Large-scale turbine generator sets and high-speed diesel engines and other units often need to balance the whole machine to ensure the smoothness of the unit operation.
Three, scraping
In the assembly of parts with the main surface often have to be scraped before processing, in order to ensure a high degree of accuracy. Part of the scraping process has been gradually replaced by fine grinding and fine planing.
Four, threaded connection
Wrench or electric, pneumatic, hydraulic and other screwing tools to fasten a variety of threaded joints to achieve a certain tightening torque.
Interference fit coupling application of compression, thermal expansion (outer coupling), cold shrinkage (inner coupling) and hydraulic taper sleeve, etc., so that the size of the surface tolerance for the interference fit of the coupling can be a close combination.
V, glued
Application of engineering adhesives and gluing process to join metal parts or non-metallic parts, easy to operate, and easy to mechanize.
Sixth, calibration
Asssembly process using length measurement tools to measure the shape of the various parts with the surface accuracy, such as straightness and flatness, etc., as well as the positional accuracy of the parts such as perpendicularity, parallelism, coaxiality and symmetry, etc., and through the adjustment, repair and other methods to achieve the required assembly accuracy. Calibration is an important part of ensuring assembly quality.