1. Requirements for craftsmen: only experienced craftsmen can formulate scientific, accurate, and efficient process flow. The technological process is the guiding standard of precision mechanical parts processing and the basis of NC programming. Poor workmanship, the whole factory is busy!
2. Equipment accuracy requirements: the accuracy of the selected processing equipment itself shall meet the accuracy requirements for the processing of precision mechanical parts. If the accuracy of processing equipment can not meet the requirements, there is no way to process precision parts that meet the requirements.
3. Requirements for operators: operators are technical engineers directly engaged in the on-site operation. They need to implement the process flow strictly, have the most basic operating equipment, fixtures, and tools, and have rich experience and strong practical ability. It can actually solve the problem.
4. Requirements for measuring tools: the quality of measuring tools directly affects the test results of precision parts. If it is measuring equipment, there is no way to detect the required tolerance accuracy. Then it has no ability to evaluate precision parts, let alone provide engineers with quality improvement direction and data.
5. Requirements for materials: materials have very different requirements for the processing of precision mechanical parts, and different materials have different processing properties. The requirements for processing parameters are also different. We need to select appropriate cutting tools, revolutions, feed rate, and various processing parameters according to the processing performance of materials.
6. Requirements for tolerance accuracy: the tolerance accuracy directly affects the selection of processing technology, processing equipment and processing parameters. This requires our process engineers and operators to have a quantitative and accurate grasp of tolerance accuracy, in order to process precision parts that meet the requirements.
7. Requirements for the environment: the processing environment refers to the environment where the machine and equipment workshop is located, which must meet the requirements of precision parts processing. Sometimes, floor vibration and noise or excessive air cleanliness and dust. Temperature and humidity will affect the precision and stability of precision machining parts.
CNC machining of mechanical parts is composed of basic surfaces such as plane, outer cylindrical surface, inner cylindrical surface or curved surface and forming surfaces formed due to various structural shapes. Each surface has a variety of processing methods. When selecting the machining method of CNC spare parts, the corresponding machining method and scheme shall be selected according to the machining accuracy, surface roughness, material, structural shape, size and production type of the parts.
1. Selection of machining methods for outer surface of CNC parts
The main machining methods of the outer surface are turning and grinding. When the surface roughness is required to be small, finish machining is also required. According to the requirements of machining surface, structural characteristics of parts, production type, type of blank, material performance, size, geometric accuracy and surface roughness, the field equipment with suitable machining scheme can be selected in combination with conditions.
2. Selection of plane processing mode for CNC spare parts processing
The main processing methods of plane include milling, planing, turning, grinding, drawing, etc. the plane with high precision also needs to be ground or scraped frequently.
3. Selection of machining method for inner hole surface of CNC spare parts
The inner hole surface processing methods include drilling, reaming, boring, drawing, grinding and finishing. The size of the preform and the size of the preform shall be reasonably selected according to the specific requirements of the preform and the production conditions.
4. Selection of plane contour machining method
The plane contour is mostly composed of straight lines, arcs or various curves. Three coordinate NC milling machines are usually used for two axis and half coordinate machining.