Machining method for compressor impeller of ZR series superchargers

Abstract

The invention discloses a machining method for a compressor impeller of ZR series superchargers, which can improve the machining precision. The machining method comprises the following steps: S1, roughly turning one end of a workpiece through a common lathe, and drilling a center hole; S2, carrying out heat treatment; S3, roughly turning the other end of the workpiece through a numerical lathe; S4, roughly turning one end of the workpiece, and the two ends of the workpiece are leveled; S5, carrying out inspection; S6, roughly turning the outer meridian plane through the common lathe, and reserving a clamping section at the end; S7, semi-finish turning the large end and the inner hole of the workpiece through the common lathe; S8, semi-finish turning the outer meridian plane of the workpiece through the common lathe, and finish turning the air inlet surface; S9, milling U-shaped grooves in the two sides of the large end of the workpiece; S10, milling blades and a runner of the workpiece; S11, finish turning the outer circle of the large end of the workpiece through the common lathe; S12, finish turning the large end face and the inner hole of the workpiece through the common lathe; and S13, finish turning the small end face and the meridian plane of the workpiece through the common lathe.

Description

technical field [0001] The invention relates to the technical field of engine manufacturing of ships and warships, in particular to a processing method for a compressor impeller of a ZR series supercharger. Background technique [0002] Compressor impeller is the core component of this type of supercharger product, key parts, such as figure 1 As shown, 1-impeller casing, 2-compressor impeller, 3-turbine shaft, 4-compressor casing. [0003] This part is installed at the left end of the turbine shaft, and it rotates at high speed with the rotor sleeve during operation. There are higher requirements for assembly and cooperation between this part and the surrounding parts, especially the stricter requirements between the meridian surface and the profile of the impeller casing. Fit and gas seal to meet the working needs of high-speed operation of the machine. The meridian surface of the parts has high dimensional accuracy and shape accuracy, especially the requirements for surfa...

AI Technical Summary

Problems solved by technology

[0005] 1. 30-car process; the operator manually clamps twice, manually aligns, and turns twice. The operation is cumbersome, the labor intensity is high, and the work efficiency is low. Especially, it cannot meet the production of a large number of products.

[0006] 2. 50 semi-finishing car; the outer circle section of φ89 is only 3.15mm long, and it is used for clamping during the subsequent 60 process. Because the clamping section is too short and the clamping amount is too small, during the turning process, especially the groove on the end surface During processing, due to the influence of factors such as large cutting force and force impact, the parts are thrown out of the chuck, resulting in safety accidents

[0007] 3. 70 process; complete the meridian surface finish turning (final processing), although the meridian surface profile and runout can meet the process requirements at that time, but after the subsequent 90 milling process and other processing, the meridian surface will be deformed and warped, thus Completely change and lose the original geometric precision of this process

[0008] 4. 110 process; due to the influence of factors such as milling deformation and clamping deformation in the previous 90 process, the end face turning allowance of this process is insufficient (only 0.25mm allowance), cannot be completely processed, and cannot meet the design requirements

[0009] 5. The shape and position accuracy of the meridian surface (the runout requirement is 0.04mm and the contour degree is 0.05mm) after various debugging and milling processes, there is always deformation and cannot meet the design requirements

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