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What are the processes and points of attention for the machining of shaft parts?

Process, in the school machining practice class, the processing of shaft parts is the most basic and important project for students to practice turning skills, but the quality of the finished workpieces of the students is always unsatisfactory. After analysis, the students are mainly on the axis. The process analysis of the process analysis of the parts is not reasonable enough. The development of process specifications in shaft parts is directly related to workpiece quality, labor productivity and economic benefits. Axis parts production is expected to be titanium, a part can have several different processing methods, but only one is more reasonable, in the formulation of mechanical processing procedures, the following points must be noted:


1. In the process analysis of the parts drawing, it is necessary to understand the technical requirements of the structural characteristics, precision, material, heat treatment, etc., and to study the product assembly drawing, component assembly drawing and acceptance criteria.


2, the processing route of carburizing parts is generally: cutting → forging → normalizing → roughing → semi-finishing → carburizing → carbon removal processing (for the part that does not need to improve hardness) → quenching → threading, drilling or milling Groove→rough grinding→low temperature aging→semi-finishing→low temperature aging→finishing.

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3. Rough reference selection: If there is a non-machined surface, the non-machined surface should be selected as the rough reference. For casting axes that need to be machined on all surfaces, the minimum surface is corrected according to the machining allowance. And choose a smooth surface, let the gate. Select a solid and reliable surface as a rough reference, while the coarse reference is not reusable.


4, fine benchmark selection: to meet the principle of baseline coincidence, as far as possible to select the design basis or assembly benchmark as the positioning benchmark. In line with the principle of benchmarking. Use the same positioning reference as much as possible in most operations. As much as possible, the positioning reference coincides with the measurement reference. The selection of high precision, stable and reliable surface is a fine benchmark. Whether the process regulations are properly formulated directly affects the quality of the workpiece, labor productivity and economic benefits. A part can be manufactured in several different processing methods, but under certain conditions, only one method is more reasonable. Therefore, in the formulation of the process rules, it is necessary to proceed from the actual situation, according to the specific conditions of equipment conditions, production types, etc., as far as possible to adopt advanced processing methods, to develop a reasonable process.



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