Processing method for planet carrier

Abstract

The invention relates to a processing method for a planet carrier. The processing method comprises the following steps that (1), after the planet carrier is subjected to rough processing, a splined hole is formed in a vertical broaching machine in a broaching manner; (2), the planet carrier is inserted into a high-precision-taper spline mandrel, axially and tightly wedging is performed by means ofthe taper, a jacking tip of a numerically controlled lathe tightly jacks center holes in the two ends of the spline mandrel, and a small end face of the planet carrier is subjected to finish turning;(3), the small end face of the planet carrier is placed on a bottom plate, positioning is performed through the splined hole and the small end face, the splined hole serves as the positioning benchmark, three planetary gear mounting holes are formed in a vertical machining centre, and the relative positions of the three planetary gear mounting holes are guaranteed by equipment precision; (4), thesplined hole and the small end face serve as the positioning benchmark, and processing of three blank portions is completed. Positioning is performed through the splined hole, the positioning benchmark is consistent with the design benchmark, the position precision is effectively guaranteed, the main precision is guaranteed by a high-precision fixture and the equipment precision of the machiningcenter, less human factors exist, and quality stability is high.

Description

technical field [0001] The invention relates to a processing method for a planet carrier. Background technique [0002] The important part in the rear drive axle of the tractor - the planetary carrier, its function is: after the power output by the gearbox is reduced by the planetary gear installed on the planetary carrier, the planetary carrier transmits the power to the spline shaft of the drive shaft, and its processing Precision requirements are high. [0003] Now take the 80-horsepower tractor planet carrier as an example, such as figure 1 shown. The planet carrier has a triangular shape with a spline in the center. 3 on planet carrier The holes are used to install planetary gears, and the coaxiality of the axis of the circle formed by the centers of the three holes and the center line of the spline indexing circle must be controlled within Within, to ensure the accuracy of the gear after installation. due to spline holes and 3 Holes cannot be processed at one...

AI Technical Summary

Problems solved by technology

Due to too many uncontrollable factors in the spline drawing, the coaxial degree after processing is mostly around 0.20-0.35mm, and the runout between the small end face and the spline is generally around 0.10mm, which is far below the drawing requirements

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