1, repair method.
Application of assembly filing, grinding and scraping and other processes to change the size, shape and location of individual parts, so that with the specified accuracy, assembly efficiency is low, suitable for single piece of small batch production, in the large, heavy and precision machinery assembly in the application of more.
2, adjustment method.
Adjustment of the position of individual parts in the assembly or join the compensation parts to achieve assembly accuracy. Commonly used adjustments are threaded parts, beveled parts and eccentric parts, etc.; compensation parts are shims and positioning rings. This method is suitable for single-piece and small and medium-sized batch production of more complex structure of the product, batch production is also a small number of applications.
3, interchangeable method.
The assembly of the same kind of parts can be loaded interchangeably, assembly can not be selected, no adjustment and repair. These parts of the machining tolerance requirements are strict, it should be in line with the assembly precision requirements with the sum of the tolerance of the parts.
4, selection and matching method.
For batches, mass production of high-precision parts such as rolling bearings, in order to improve the processing economy, usually high precision parts of the machining tolerance is relaxed, and then in accordance with the actual size of the size of the division into a number of groups, so that the corresponding group of mating parts can still be realized in accordance with the requirements of interchangeable assembly.
Expanded informationThe basic principles of the development of the assembly process:
1, to ensure the quality of product assembly to extend the service life of the product;
2, reasonable arrangement of the assembly sequence and process, minimize the amount of manual labor of the clampers to shorten the assembly cycle and improve the efficiency of the assembly;
3, to minimize the assembly of the footprint;
4, to minimize the cost of assembly work;
5, to minimize the cost of assembly work;
6, to minimize the cost of assembly work. minimize the cost of assembly work.
Environmental conditions:
In order to ensure the assembly quality of mechanical products, assembly places are sometimes required to have certain environmental conditions, such as the assembly of high-precision bearings or high-precision machine tools (such as co-ordinate boring machine, thread grinder, etc.) ambient temperature must be maintained at a constant temperature of 20 ± 1 ℃; for the assembly of precision requirements of the product a little lower, the assembly of the ambient temperature can be reduced accordingly, such as seasonal changes in the provisions of the For: summer 23 ± 1 ℃, winter 17 ± 1 ℃.
Baidu Encyclopedia - Mechanical Assembly