The formulation of process regulations in linear optical axis parts for precision parts processing is directly related to workpiece quality, labor productivity and economic benefits. There can be several different processing methods for a part, but only one of them is more reasonable. In formulating the mechanical processing procedures, the following points must be paid attention to.
Whether the linear optical axis or precision shaft parts processing procedures for precision parts processing are formulated reasonably, directly affects the quality of the workpiece, labor productivity and economic benefits. A part can be manufactured by several different processing methods, but under certain conditions, only one method is more reasonable. Therefore, when formulating process regulations, it is necessary to proceed from reality, according to equipment conditions, production types and other specific conditions, try to use advanced processing methods, and work out reasonable process regulations.
The processing of linear optical axis parts is the most basic and most important item for students to practice turning skills, but the quality of the final finished workpieces by students is always very unsatisfactory. After analysis, it is mainly that the students have not formulated enough technical procedures for the process analysis of linear optical axis parts. reasonable.
1. In the process analysis of the part drawing, it is necessary to understand the technical requirements of the part structure, accuracy, material, heat treatment, etc., and to study the product assembly drawing, component assembly drawing and acceptance standards.
2. The processing route of carburized parts is generally: blanking → forging → normalizing → rough machining → semi-finishing → carburizing → decarburizing (for parts that do not need to increase the hardness) → quenching → threading, drilling or milling Groove → rough grinding → low temperature aging → semi-finishing grinding → low temperature aging → fine grinding.
3. Fine datum selection: precision parts processing should conform to the principle of datum coincidence, and design datum or assembly datum should be selected as the positioning datum as much as possible. Comply with the principle of unification of benchmarks. Use the same positioning datum in most processes as much as possible. Make the positioning reference coincide with the measurement reference as much as possible. Choose a surface with high precision, stable and reliable installation as the precision standard.
4. Selection of rough datum: For precision parts that have non-machined surfaces, the non-machined surface should be selected as the rough datum. For casting shafts that need to be machined on all surfaces, align them according to the minimum machining allowance. And choose a flat and smooth surface, let the gate open. Choose a firm and reliable surface as the rough datum, and at the same time, the rough datum cannot be reused.