Machining method for side face turbine hole of extending box of miniature automobile transmission

Abstract

The invention belongs to the technical field of machining and discloses a machining method for a side face turbine hole of an extending box of a miniature automobile transmission. Vertical machining is selected, a phi 16 mechanical clamping end mill is selected for rough machining, and a specially-made combined type hard alloy reamer is adopted for finish machining; diesel is cooled; a datum planeand two positioning pin holes are selected as a positioning datum, and the datum face, two positioning pins and a jack are adopted for positioning; during rough machining, the origin of programming coordinates and the center of the turbine axial hole are overlapped, and the hole opening face of the turbine axial hole is arranged as a zero point in the Z-axis direction; the phi 16 mechanical clamping end mill is adopted for milling, and the F value is taken as 100; the origin of programming coordinates and the center of the turbine axial hole are overlapped through finish machining, and the hole opening face of the turbine axial hole is arranged as the zero point in the Z-axis direction; and the specially-made combined type hard alloy reamer is adopted for reaming machining, and one-time forming is achieved. It can be ensured that the cutter relieving phenomenon does not occur during machining of the turbine axial hole, and the requirements of position precision, dimensional precision,finish degree and the like all can be met.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a method for processing a turbine hole on the side of an extension case of a transmission case of a miniature automobile. Background technique [0002] The gearbox of a miniature car is an indispensable and important part of the car. The function of the gearbox housing is to connect the shafts, sleeves, gears and other related parts in the machine and components into a whole, and keep them in the correct relative position. , work in coordination with each other to transmit power, change speed, and complete the intended function of the machine or component. Box parts require sufficient strength and rigidity, good sealing and heat dissipation. Therefore, the processing quality of box parts directly affects the performance, precision and life of the machine. Existing machining plan for the side turbine hole: the turbine shaft hole is a tapered step blind ...

AI Technical Summary

Problems solved by technology

[0003] To sum up, the problem existing in the prior art is: due to the relatively long cutting tool, it is easy to cause the deformation of the cutting tool during the machining process, resulting in the phenomenon that the turbine hole after machining is larger at the top and smaller at the bottom.

Vibration is prone to occur, resulting in vibration marks on the machined turbine hole wall, making the dimensional accuracy and surface roughness unable to meet the technical requirements

Furthermore, due to the previous two factors, the service life of the tool will be shortened, and the product qualification rate will be greatly reduced.

The tool change debugging time is greatly increased

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