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Improve machining precision mould? Grasp the time is enough!
by：CSSSLD
2021-01-23
Ensure and improve the machining precision of the method, can be roughly summed up as the following:
1. To reduce the original error
improve geometric accuracy of machine tool parts processing use, improve the accuracy of jig, measuring tools and tool itself, stress and thermal deformation control technology system, tool wear, deformation, the measurement error caused by the internal stress and other all belong to directly reduce the original error. In order to improve the machining precision, to produce the processing error of the original error is analyzed, according to the different situation of the main original error of machining error take different measures to solve. For precision parts processing should maximize the use of precision machine tool geometric accuracy, stiffness, and control of processing the thermal deformation; With forming on the surface of the parts processing, the main is how to reduce the forming shape of cutting tool and tool installation errors.
this method is widely used in the production of a basic method. It is after find out a major factor in the production of machining error, try to eliminate or reduce these factors.
2. To compensate the original error
error compensation method, are artificially created a new kind of error, to offset the original error in the original process system. When the original error is negative human error is positively, on the other hand, negative, and try to make both equal; Or use a primitive error to offset another original errors, and try to make both equal, in the opposite direction, so as to reduce machining error, enhance the machining precision.
3. Transfer the original error
error transfer method is essentially transfer process system of geometric error, mechanical deformation and thermal deformation, etc. An instance of a lot of error transfer method. Such as when required by the machine tool accuracy can not meet the parts processing, often not blindly to improve the accuracy of machine tool, but from the process or to find a way to clamp, create conditions and make the machine tool geometric error transfer to does not affect the machining accuracy of aspects.
4. Divide the original error
in the processing, as a result of the existence of blank or on the process error, often caused by the process of machining error, or because the workpiece material properties change, or the process of technological change, Such as blank after the elaboration, cancel the original machining process) , large changes in the original error caused by. To solve this problem, it is to divide by grouping adjustment error. The essence of this method is according to the size of the original error are divided into n
groups, each group of blank error is narrowed down to the original 1 / n, and then press each processing respectively.
5. Homogenization of the original error
high shaft and hole to fit precision requirement, often using grinding process. Tool itself does not require high precision, but it can in the process of the relative movement and artifacts do to trace the cutting of artifacts, is gradually wear off (high Mould, of course, also be the workpiece grinding to part) So as to achieve the high precision of workpiece. Between the surface of the friction and wear process, is the process of error decreasing, this is the error of homogenization method.
6. On the processing method of
in the processing and assembling, some accuracy problem involving the relationship between the parts or components, and is quite complex, if blindly to improve the precision parts and components itself, sometimes not only difficult, even impossible, if the on-site processing method ( Also known as its processing and replacement method) , it is possible to easily to solve the problem of the accuracy of the looks very difficult. In situ processing method in mechanical parts processing commonly used as the effective measures to ensure parts processing precision.
1. To reduce the original error
improve geometric accuracy of machine tool parts processing use, improve the accuracy of jig, measuring tools and tool itself, stress and thermal deformation control technology system, tool wear, deformation, the measurement error caused by the internal stress and other all belong to directly reduce the original error. In order to improve the machining precision, to produce the processing error of the original error is analyzed, according to the different situation of the main original error of machining error take different measures to solve. For precision parts processing should maximize the use of precision machine tool geometric accuracy, stiffness, and control of processing the thermal deformation; With forming on the surface of the parts processing, the main is how to reduce the forming shape of cutting tool and tool installation errors.
this method is widely used in the production of a basic method. It is after find out a major factor in the production of machining error, try to eliminate or reduce these factors.
2. To compensate the original error
error compensation method, are artificially created a new kind of error, to offset the original error in the original process system. When the original error is negative human error is positively, on the other hand, negative, and try to make both equal; Or use a primitive error to offset another original errors, and try to make both equal, in the opposite direction, so as to reduce machining error, enhance the machining precision.
3. Transfer the original error
error transfer method is essentially transfer process system of geometric error, mechanical deformation and thermal deformation, etc. An instance of a lot of error transfer method. Such as when required by the machine tool accuracy can not meet the parts processing, often not blindly to improve the accuracy of machine tool, but from the process or to find a way to clamp, create conditions and make the machine tool geometric error transfer to does not affect the machining accuracy of aspects.
4. Divide the original error
in the processing, as a result of the existence of blank or on the process error, often caused by the process of machining error, or because the workpiece material properties change, or the process of technological change, Such as blank after the elaboration, cancel the original machining process) , large changes in the original error caused by. To solve this problem, it is to divide by grouping adjustment error. The essence of this method is according to the size of the original error are divided into n
groups, each group of blank error is narrowed down to the original 1 / n, and then press each processing respectively.
5. Homogenization of the original error
high shaft and hole to fit precision requirement, often using grinding process. Tool itself does not require high precision, but it can in the process of the relative movement and artifacts do to trace the cutting of artifacts, is gradually wear off (high Mould, of course, also be the workpiece grinding to part) So as to achieve the high precision of workpiece. Between the surface of the friction and wear process, is the process of error decreasing, this is the error of homogenization method.
6. On the processing method of
in the processing and assembling, some accuracy problem involving the relationship between the parts or components, and is quite complex, if blindly to improve the precision parts and components itself, sometimes not only difficult, even impossible, if the on-site processing method ( Also known as its processing and replacement method) , it is possible to easily to solve the problem of the accuracy of the looks very difficult. In situ processing method in mechanical parts processing commonly used as the effective measures to ensure parts processing precision.
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