Improve the accuracy of mold processing has been a headache for many companies, today Shenzhen Kexiang mold editorial to bring you a few points to improve the accuracy of the mold.
Methods to ensure and improve machining accuracy can be roughly summarized as follows.
1. Reduce the original error
Improve the geometric accuracy of the machine tool used for machining parts, improve the accuracy of fixtures, gauges and tools themselves, control the process system force, thermal deformation, tool wear, deformation caused by internal stress, measurement errors, etc. belong to the direct reduction of the original error. In order to improve the machining accuracy, need to analyze the processing error of the original error, according to the different circumstances of the processing error caused by the main original error to take different measures to solve. For the processing of precision parts should be used as much as possible to improve the geometric accuracy of the precision machine tool, rigidity and control of processing thermal deformation of the parts with a molded surface machining, it is mainly how to reduce the molding tool shape error and tool installation error. This method is a basic method widely used in production. It is after identifying the main factors that produce machining errors, try to eliminate or reduce these factors.
2. Compensation of the original error
Error compensation method, is to artificially create a new error, to offset the original process system in the original error. When the original error is negative when the artificial error will take the positive value, and vice versa, take the negative value, and try to make the two equal in size or the use of a primitive error to offset another primitive error, but also try to make the two equal in size, in the opposite direction, so as to achieve the reduction of processing error, improve the processing accuracy of the purpose.
3. Transfer the original error
Error transfer method is essentially a transfer process system of geometric error, force deformation and thermal deformation, error transfer method of many examples. Such as when the precision of the machine tool does not meet the quarter piece processing requirements, often not to improve the precision of the machine tool, but from the process or to come on the tool to think of ways to create conditions so that the geometric error of the machine tool to transfer to do not affect the precision of the addition to the side.
4. Equalization of the original error
In the mold processing, due to the existence of gross or previous process errors, often resulting in the process of processing errors, or due to changes in the material properties of the workpiece, or on the process changes in the workshop (such as the hand bad refinement, the original cutting process canceled), caused by a large change in the original error. To solve this problem, is the use of grouping to adjust the average error approach. The essence of this approach is the original error according to its size is divided into n groups, each group of gross error range is reduced to the original 1/n, and then adjusted according to the groups were processed.
5. homogenization of the original error
With high precision requirements for shafts and holes, often using the grinding process, the research tool itself does not require a high degree of accuracy, but it can be done in the process of relative motion and the workpiece for the workpiece trace cutting, the high point of the gradual grinding off (of course, the mold was also part of the workpiece grinding), so that the workpiece to achieve a high degree of accuracy. This process of friction and wear between surfaces is the process of continuous reduction of error, which is the error homogenization method.
6. In-situ processing method
In the mold processing and assembly, some accuracy issues involved in the parts or components of the interrelationships, quite complex, if you insist on improving the zero, the parts themselves, sometimes not only due to the difficulty, or even impossible, if the use of in-situ machining method (also known as its own processing and repair method), it may be very convenient to solve the seemingly very difficult accuracy problems. In-situ machining method in mechanical parts processing is often used as an effective measure to ensure the accuracy of parts processing.
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