Differential mechanism shell casting process

A differential housing and casting process technology, applied in the direction of manufacturing tools, casting molding equipment, casting molds, etc., can solve the problems of inability to guarantee the shape and position accuracy of the four cross shaft holes, low machining accuracy, and wear of boring tools. Achieve the effect of solving shrinkage cavity and shrinkage defects, reducing the amount of machining and cutting, and avoiding the formation of hot spots

Active Publication Date: 2015-02-18
长春一汽四环金仑汽车零部件有限公司
View PDF5 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] But the applicant of the present invention finds through long-term practice the casting process of above-mentioned heavy-duty monolithic differential case, as attached figure 1 And attached figure 2 The heavy-duty one-piece differential case shown in , which includes the differential case 01 and the shaft hole seat 02, because the cross shaft hole is not cast out, 4 huge thermal joints are formed on the differential case, which brings great pressure to the casting. Come adverse effects, the disadvantages are:
[0005] 1. The shaft hole seat 02 on the differential case 01 has the thickest thickness because there is no cross shaft hole cast there, and there are generally four shaft hole seats 02 on the differential case 01, so when casting 4 huge thermal knots (as attached figure 2 The dotted ring in the center), shrinkage cavity and shrinkage defects are easily formed at the hot joint, which affects the quality of the casting;
[0006] 2. Due to the above-mentioned shrinkage cavity and shrinkage defect at the hot joint, it is easy to drill off the center when drilling the cross-axis hole, which cannot guarantee the shape and position accuracy of the four cross-axis holes, and the drill bit is easily broken. At t

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Differential mechanism shell casting process
  • Differential mechanism shell casting process
  • Differential mechanism shell casting process

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0033] The present invention will be further described in detail below in conjunction with the drawings.

[0034] Attached image 3 To attach Picture 9 , A differential case casting process, which includes the following steps:

[0035] 1. Using a core making machine, a sand core body 1 is produced. The sand core body 1 is an integrated structure with a cast hole sand column 2 for casting a cross shaft hole on the differential case;

[0036] 2. Dry the sand core body 1 described in step one;

[0037] 3. Place the sand core body 1 after drying in step 2 in the upper and lower molds of the differential housing, and then cast the molds according to the conventional casting process;

[0038] 4. Finally, the mold is opened to obtain a differential housing 4 with a cross shaft hole 6.

[0039] Preferably, the core-making machine is a core-shooting machine that uses a hot-box process to make a coated sand core.

[0040] The conventional casting method mentioned in the present invention refers t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a differential mechanism shell casting process which has the benefits that the hot section formation can be avoided, the shrinkage porosity and shrinkage cavity defects are overcome, the quality of castings is ensured, the large surface hardness fluctuation of a planet wheel machining spherical surface in contact with cold iron caused by the use of the cold iron is avoided, and the influence on follow-up machining is small; the drilling procedures are eliminated, and a rough boring-fine boring process is directly adopted, so that the cutting quantity is greatly reduced, and the processing efficiency is improved. The differential mechanism shell casting process comprises the following steps: 1, making a sand core main body (1) by adopting a core making machine, wherein the sand core main body (1) adopts an integral structure with a cast hole sand column (2) for casting a cross-shaped shaft hole in a differential mechanism shell; 2, drying the sand core main body (1) in the step 1; 3, putting the sand core main body (1) dried in the step 2 in upper and lower molds of the differential mechanism shell and then casting the molds according to conventional casting processes; 4, finally, opening the molds to obtain the differential mechanism shell (4) with the cross-shaped shaft hole.

Description

technical field [0001] The invention relates to a casting process for a differential case, in particular to a casting process for the currently popular heavy-duty integral differential case. Background technique [0002] The automotive differential is the main part of the drive axle. Its function is to allow the two half shafts to rotate at different speeds while transmitting power to the two half shafts, so that the wheels on both sides can run at unequal distances in the form of pure rolling as much as possible, and reduce the friction between the tires and the ground. The differential has a very important component, that is, the differential case. The shape of the differential case is determined according to different vehicle models and the structure of the differential. There are left and right cover closed type, light overall open type, heavy integral type and so on. The differential case is the skeleton of differential gears, side gears, cross shafts, etc. The differ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B22C9/22B22C13/08B22C13/12
CPCB22C9/24B22C13/12
Inventor 刘天平王爱丽
Owner 长春一汽四环金仑汽车零部件有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products