Machinery processing methods - affects of the machining parts accuracy

           The quality of parts processing will directly affect the service life of mechanical products and work performance, in the process of machining, the need to control the quality and accuracy of both aspects, the process of machining is affected by a variety of factors, resulting in the workpiece and tool position offset thus triggering the production of parts with serious errors.


       The impact of geometric accuracy on machining accuracy: Geometric accuracy mainly includes different components such as machine workpieces, tools and fixtures. In the manufacture of machine tools, the shape and position of newly machined parts can be significantly deficient and inaccurate, resulting in machining accuracy being affected. In addition, when the machine tool is installed, if it is not in place, or if the machine tool has been used for a long time, serious wear and tear deformation will occur, which will also affect the overall accuracy effect of the parts processing. When processing with tools, the tool will be in direct contact with the workpiece, a long time will cause serious tool wear, if you continue to use the worn tool, processing will also cause parts processing accuracy inaccurate problem. When machining parts, the part needs to be fixed in order to be machined, and this requires the use of fixtures. If the fixture itself is manufactured incorrectly or if there are errors in the positioning of the fixture, this can also cause significant errors in the machining of the part. The problem needs to be marked when the angle of the part is selected and also involves the part being unmachined, which can trigger machining accuracy as the data for the part does not match the design drawing. The selection of the part degrees is made in accordance with the problem. It can also cause the part, designed and manufactured as a whole, to fail to meet the requirements. And according to the actual situation, in the hydraulic transmission system mechanical designer, if the staff experience is not sufficient, may choose 30 degrees parts, reduce the resistance of the assembly, improve the guide performance, but also be able to avoid damage to the o-ring, and general parts in the parts design, the relevant labeling will be detailed records, in the design can not have a perfect design scheme, direct standard parts also to Indirect labeling, so the need for accurate records and calculations of the parts, to enhance the reliability and safety of the angle labeling. In the actual manufacturing process, if parts are not accurately calculated, this can cause sharp edge burrs to be left unremoved, or the o-ring to be damaged. In the course of subsequent use, oil leaks may also occur.

        The impact of stress deformation on processing accuracy: In the process system, the tools and fixtures are usually in a static state. When the equipment is running at a high speed, the entire system will be affected by various forces, resulting in subtle changes in the process system, the position of the tool and fixture of the tool and fixture The running trajectory of the tool will also form a significant change, which seriously affects the processing accuracy of components. For this reason, we must find a very weak link in the system, use higher intensity parts and components for replacement, enhance the process design effect of the entire process system, and find scientific methods to reduce the loads that the process system is affected during processing, reduce the process system, reduce the load of the process system, reduce Deformation. For example, during the processing of parts, different processing methods are used to use different processing methods, and it is also used to effectively avoid deformation.

        The effect of heat deformation on processing accuracy: During the processing of parts, multiple links such as grinding, milling, and car washing will produce a lot of frictional calories. These heat will cause heat deformation of the industrial system and cause component processing errors. First of all, the thermal deformation of the workpiece will directly affect the processing accuracy, causing the accuracy of the parts to process to meet the requirements. When the length of the parts is long or the accuracy requirements are higher, the impact will be greater. In order to effectively reduce the impact of the heat deformation of workpieces on processing accuracy, the most important thing is to use appropriate coolant to reduce the temperature of the surface processing of the parts during processing. The calories have more time loss. After processing is completed, it is necessary to stop heat dissipation and process fine processing. Secondly, the effect of the heat deformation of the tool on the processing accuracy, the heat deformation of the tool is caused by a large amount of thermal during the cutting process. Parts and components are often cut in continuous cutting. At this time, the heat deformation of the tool will develop rapidly. In order to reduce the interference of the processing accuracy of the heat deformation, the appropriate cutting amount and tool can be selected to ensure that the tools are sufficiently cooled and lubricated. The heat deformation of mechanical beds will also affect the processing accuracy. As an important part of the entire parts processing, the machine tool is easily affected by the heat of the external environment and processing. Different, the distribution is uneven, and the temperature between each part will also have significant differences, causing different temperature deformation between different temperatures, the original geometric accuracy will also be damaged, and errors can be easily produced during processing. If you want to effectively reduce the effect, you want to effectively reduce The heating of the machine tool has an impact on the processing accuracy. The most important thing is to increase the heat dissipation effect through isolation of the heat source or improve the heat source, ensure that the cooling efficiency of the machine tool is greatly improved, and the environmental temperature must be effectively controlled to ensure that the machine tool is balanced when accelerating.