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Improvement of product quality in mechanical processing

Return list source: date: 2019-08-20 09:21:58

Improvement of product quality in mechanical processing

With regard to the improvement of product quality in mechanical processing, in the following narrative, this paper mainly introduces the factors that affect the surface quality of workpiece in mechanical processing, and puts forward the improvement of processing accuracy, product quality, reduction of errors in mechanical processing and differentiation errors in mechanical processing, etc. Explain in detail:



1. Factors affecting the surface quality of workpieces in mechanical processing:

1. Cutting level and roughness of workpiece surface:

In mechanical processing, when the workpiece is machined, the surface of the workpiece machined in the process will form almost the same copy as the shape of the cutter, leaving a large number of scales on the surface of the workpiece, which will easily increase the surface roughness and lead to the decline of the surface quality of the workpiece. In view of this situation, the radius of the tool tip arc is appropriately increased and the feed of the tool is appropriately reduced during the cutting process, so that the height of the residual area of the tool on the workpiece can be reduced as much as possible to ensure that the roughness of the workpiece surface is controlled within an appropriate range. It can reduce the number of scales and chip tumors on the workpiece surface, improve the quality of the workpiece surface and prolong the service life of the workpiece.

2. The influence of cutting quantity on workpiece in mechanical processing:

It has been proved by relevant practice that in the process of cutting workpiece, if the cutting speed is higher, the plastic deformation of workpiece surface can be greatly reduced; moreover, the higher the cutting speed, the smaller the plastic deformation degree, which can effectively reduce the roughness of workpiece surface and improve it. Surface quality of workpiece. If the cutting speed is insufficient, the chip-forming tumors will occur in the cutting process of the workpiece. The chip-forming tumors refer to small pieces of metal adhesives with high hardness at the cutting edge of carbon steel.

This is because in the process of processing, the workpiece material is squeezed, the chip has a great pressure on the front of the tool. Because of the influence of cutting heat, when the friction force is greater than the bonding force between the lattices in the material, the "stagnant layer" will form a chip nodule. The roughness of workpiece surface is increased and the quality of workpiece surface is decreased.

2. Improving the processing accuracy and product quality in mechanical processing:

Precision is an important index to reflect the quality of machined products. In the process of mechanical processing, errors can not be completely avoided, only through continuous improvement of processing technology to make errors continue to reduce, as far as possible to improve the accuracy of products, improve the quality of products.

1. Reduce the original error in mechanical processing:

Workpiece processing is mainly accomplished by machine tools. The errors of machine tools will directly affect the accuracy of the workpiece, and ultimately affect its accuracy. This requires ensuring the accuracy of the machine tool itself and reducing the errors in processing engineering. By taking appropriate measures to reduce tool wear, the accuracy of fixture and tool can be improved. According to the causes of errors in the process of processing, the relevant factors are adjusted to eliminate the root causes of errors, so as to ensure the accuracy of workpiece processing and improve the quality of workpiece.

2. The original error of differentiation in mechanical processing:

Workpiece processing is generally carried out in batches. In order to improve the processing accuracy of the whole batch of workpieces and reduce the impact of the original error on the processing accuracy, it can be differentiated appropriately. Especially for some high-precision workpieces, the surface of these workpieces needs to achieve high accuracy, which can be cut in the process of processing, so that the original error can be homogenized to a certain extent. In the process of processing, errors are constantly corrected, so that the errors of workpiece processing are continuously reduced.

The above questions about the improvement of product quality in mechanical processing are shared here. I believe they will be helpful to everybody in their daily work.