Now, with the development of science and technology, the machining industry requires higher and higher precision, so non-standard mold parts are more and more widely used in production and processing. A complete set of molds is composed of many non-standard parts, and the mold parts have a great impact on the quality of molds. It can be seen that the accuracy of non-standard parts is important. Therefore, the finishing of non-standard mold parts must be well controlled.
In order to control the accuracy of non-standard parts processing, we should consider many aspects of non-standard processing molds: the design of non-standard molds, the materials of non-standard molds, the processing process of non-standard molds and the final quality specifications of non-standard molds. None of these aspects can be ignored, and any further neglect will have a serious impact on the accuracy of non-standard parts.
1、 Rationality of non-standard die design
The rationality of mold structure design is the basis for processing non-standard parts. It is related to the production cycle and processing quality of the mold, so we need to pay attention to it. The following aspects should be paid attention to when designing non-standard molds:
1. When designing non-standard molds, we need to find ways to make the production process simple and easy to operate.
2. When designing the non-standard mold, the lower guide post structure is required for the small push rod or the eccentric structure of the mold. For multi rib ventilation windows, pay attention to reserving positions.
3. After the non-standard mold is designed, all data shall be checked until all dimensions are correct, and then the drawings can be officially issued for processing.
2、 Quality control of mould materials
Non standard parts are small batches or single pieces in production. They are complicated in the processing process, some have a long manufacturing cycle, and the materials used have a great impact on the finished products. According to the current production situation, mold production needs to control the following aspects.
1. For the selection of suppliers that need to be fixed and have stable quality assurance, the cost should also be considered.
2. Strict inspection is required for material processing:
(1) Is the chemical composition of the material correct
(2) Whether the surface quality of the material meets the standard, and whether there are obvious cracks, scabs, slag inclusions, etc.
(3) Whether it meets the hardness requirements of non-standard parts.
(4) The accuracy of datum and parting surface shall be further checked.
3. During the production process, it is necessary to monitor the quality of materials and mold bases at any time. Once there is any problem, it is necessary to give feedback in time.
3、 Monitoring the process of non-standard parts processing
1. First of all, the drawings, process requirements and completion time of non-standard parts need to be very clear.
2. The processing personnel shall strictly follow the requirements of the drawings during the processing process, and conduct self inspection at all times during the processing process.
3. The work requiring cooperation in the processing process shall be negotiated in advance to avoid errors in the cooperation process.
4、 Factory quality requirements for non-standard parts
1. The surface of non-standard parts shall be free of scratches, scratches and other surface defects.
2. The machined threaded surface shall not have black skin, bump, disorderly buckle and burr defects.
