-
Product Presentation
22
2023
-
03
Methods for Controlling and Reducing the Deformation of the Spline Hole of the Carburized Motorcycle Sprocket
Methods for controlling and reducing the deformation of the spline hole of the carburized motorcycle sprocket:
(1) Control and Reduction of Spline Hole Deformations During Cold and Hot Machining Fits In all cases, the dimensions of the spline hole for motorcycle sprockets before heat treatment should be determined through cold and hot machining fits, which is a basic measure to control spline hole deformation.
After carburizing and quenching of motorcycle sprockets with inner splines, the inner splines generally exhibit a trend of shrinkage, taper, and waist drum shape. For this, the following process measures can be taken.
1) Adopt spline broach for cold and hot matching. According to the law of reducing distortion of internal splines, standard spline broaches cannot be used, but non-standard heat shrinkable spline broaches should be used. Through experiments, it can be determined that the average shrinkage of carburized and quenched internal splines is 0. 5% 0.5 mm, the outer diameter of the broach will increase by 0 05mm。 As shown in the technical requirements of the drawing, the major diameter of the inner spline is φ 32+0.05mm, the size of the broach can be determined as φ 32.10+0.25 mm, tolerance+0 025mm is the manufacturing tolerance of the broach. In this way, the inner spline of the motorcycle sprocket can basically meet the technical requirements after carburizing and quenching.
After determining the size of the spline broach, due to the differences in the shape and size of the motorcycle sprocket, the internal spline will also have varying degrees of taper and waist drum distortion, which will seriously affect the gear accuracy. Therefore, corresponding measures must be taken to reduce the distortion of the internal spline.
(2) Adjust the broach feed direction. The broach feed direction has a certain influence on the spline distortion in the motorcycle sprocket. As shown in Figure 4-57, for the half shaft gear, the broach enters from the large end and exits from the small end. Its measurement results: 640.08mm at the large end, and 640.08mm at the small end φ 40.05mm, the spline hole has a taper of 0.03mm. At this time, after carburizing and quenching, the small end shrinks much, while the large end shrinks little. Coupled with the original broaching taper, the taper distortion increases. The result is that the large end exceeds the upper tolerance and the small end exceeds the lower tolerance, which is unacceptable. If you change the direction of the broach feed, the broach feed from the small end of the spline hole, and the large end exit, you can avoid or reduce the taper generated during broaching.
Zhengtai sprocket
China office
Daokou, Fu Village, 106 National Road, Shimenqiao, Renqiu City, Hebei Province
Company email
Copyright © 2023 Renqiu Zhengtai sprocket Co, Ltd Powered by 300.cn丨TAG丨Business license
Quick Links
Renqiu Zhengtai sprocket Co, Ltd
We have always focused on product development and manufacturing, continuously optimizing product quality and service system, and enhancing product competitiveness.