Axial precision machinery parts processing process should pay attention to the things of precision machinery parts processing process formulation, directly related to the quality of the precision parts
, labor productivity and economic benefits, a can be processed by different parts, technology personnel should consider a kind of more reasonable or solution.
Axial precision parts in machining
enterprises, processing have been developed in the process of make the precision machining process, should pay attention to the following points.
First of all, is to make a detailed analysis of parts drawings, need to understand the parts structure characteristics, precision, material, heat treatment and other technical requirements, conditional will study under the condition of product assembly drawing, parts assembly and acceptance criteria.
Followed by in axial precision machinery parts processing, if there is the machining surface, the processing surface should be as a benchmark, for all surface machined castings shaft, according to the machining allowance minimum surface alignment, and level off is smooth surface, avoid the gate, for coarse surface have solid and reliable benchmark crude benchmark and cannot repeat use.
The third is the essence of the benchmark choose to conform to the principle of benchmark superposition, as far as possible choose design benchmark and assembly benchmark as locating datum, conform to the principle of unified benchmark.
Multiple process using the same positioning datum as far as possible, make the locating datum and measurement datum coincidence, selection of high precision, stable and reliable installation surface for reference.
Axial precision machinery parts processing process and characteristics: follow the principle of benchmark superposition and unity;
Follow the principle of mutual benchmark: parts beyond the first round as crude benchmark, surfacing and drill the center hole, and then to the center hole for the locating datum coarse cylindrical, at the same time to rough turning cylindrical cone hole for the locating datum processing, this is the mutual benchmark principle, make the processing has a higher than a precision positioning datum.
Demand for cone wall: semi-finishing and finish machining cylindrical, adopted the cone wall, hole at the center of the cone stuck as the finishing the shaft on the surface of the cylindrical positioning base.
Cone plug has a high precision to ensure that the cone plug cone and the top hole had a higher alignment.
Cone plug is installed should not be replaced, in order to reduce installation error caused by the repeated installation;
Near the shaft end cone plug diameter must have external thread, to facilitate unloading cone wall.
To ensure the accuracy of the axial cylindrical grinding, heat treatment must be arranged after grinding process of center hole, and demand reach a finer surface roughness, cylindrical grinding, the influence of axial precision machinery parts processing roundness is mainly due to the two top hole alignment, and the roundness error of center hole.
To eliminate stress, coarse grinding arrangement after low temperature aging process.
To get high precision cylindrical grinding is just points of coarse grinding, fine grinding, fine grinding process.
Fine grinding in high precision grinding machine processing.
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