A Casting Process of Rear Axle Hub Connector

A rear axle wheel hub and casting process technology, which is applied in the field of auto parts, can solve the problems of the use and waste of the shaft cavity space, achieve the effects of improving quality, ensuring the overall strength requirements, and improving the use effect

Active Publication Date: 2018-10-02
YINYI GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The shaft chambers in the prior art are all simple cylindrical chambers, which are only used to pass through the axles. Although this arrangement plays a role in the lightness of the rear axle hub connector to a certain extent Quality requirements, but the use of the shaft cavity space has resulted in waste

Method used

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  • A Casting Process of Rear Axle Hub Connector
  • A Casting Process of Rear Axle Hub Connector
  • A Casting Process of Rear Axle Hub Connector

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Embodiment 1, a rear axle hub connector, see attached Figure 1-3 , including a cylindrical body, on which a connecting disc 13 is arranged to divide the cylindrical body into two sections, wherein the longer section is a splined cylinder 11 with a flower-shaped cross-section, and the shorter section is a positioning cylinder 12, The positioning cylinder 12 will cooperate with the brake drum (not shown in the figure) when in use, the positioning cylinder 12 will be inserted into the brake drum, and the end of the brake drum opposite to the connecting disc 13 is provided with a bolt, and the bolt will pass through After the connecting hole 131, the wheel is loaded on the brake drum. The wheel is provided with a mounting hole for passing through the bolt. After the mounting hole of the wheel passes through the bolt, the wheel is fixed by a nut.

[0048] See attached figure 1 , the end of the spline barrel 11 is provided with a threaded hole or a bolt hole 111 around its ...

Embodiment 2

[0052] Embodiment 2, a production mold of a rear axle hub connector, see attached Figure 4 with 5 , since this rear axle hub connector of the present invention has an axial hole, and the axial hole includes an inner bearing cup 21, an outer bearing cup 22 and a shaft cavity 23, the inner cavity structure of the rear axle hub connector is complicated, and the general Casting with internal core-pulling moulds will not only increase the cost of the mould, but it is also difficult to control the stability of the cast product, which is prone to problems such as structural strength or internal stress concentration of the product, and the mold is very easy to damage and difficult to repair; Therefore, in order to adapt to the rear axle hub connector with a complex inner cavity structure, the sand core 3 that is consistent with the axial cavity wall shape of the rear axle hub connector is used for auxiliary casting, and the circumferential wall surface of the sand core 3 Consistent ...

Embodiment 3

[0055] Embodiment 3, a production process of a rear axle hub connector, using the mold in Embodiment 2, casting with a sand core 3 casting process, the steps include the following:

[0056] S1. Preheating, raise the mold temperature to 410±20°C and then spray heat-insulating paint, raise the temperature of sand core 3 to 200±20°C and then spray heat-insulating paint;

[0057] S2. Mold loading, put the mold into the differential pressure casting table (here, the pressure difference between the metal liquid surface of the holding furnace and the inside of the mold adopts the pressurization method, and the gas of the same pressure is first introduced into the sealing cover and the holding furnace at the same time , so that the pressure between them is balanced, and then maintain the gas pressure value in the sealed cover, gradually introduce a higher pressure gas to the metal liquid surface in the holding furnace, and create a pressure difference between the upper and lower tanks,...

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Abstract

The invention discloses a rear axle hub connector and a casting technology thereof. The technology includes the following steps that S1, preheating is conducted, wherein dies and a sand core are coated with heating paint and then coated with heat insulation paint; S2, die arrangement is conducted, wherein the dies are arranged in a counter-pressure casting table; S3, the sand core is installed, wherein the sand core is installed on the lower die; S4, die closing is conducted, wherein a die cavity for forming a casting is formed jointly by the lower die, the upper die, the side die and the sand core; S5, liquid filling is conducted, molten metal is injected in from a pouring gate of the lower die in a liquid ascending manner, and the whole die cavity is filled with the molten metal; S6, cooling is conducted, wherein the molten metal in the die cavity is cooled and solidified; S7, pressure maintaining is conducted, wherein after the die cavity is filled with the molten metal, pressure is applied to the molten metal in the die cavity continuously; and S8, die release is conducted, wherein the side die is opened firstly, the upper die drives a workpiece to ascend to be separated from the lower die, an ejection mechanism acts, the workpiece is separated from the upper die and received by a receiving disc, and then the workpiece enters water to be cooled to achieve temperature reduction. The manner that sand core hollowing and counter-pressure casting are combined is adopted, the cast rear axle hub connector is high in density, the integrity can be guaranteed, and the structural strength is stable.

Description

technical field [0001] The invention relates to the field of auto parts, more specifically, it relates to a casting process of a rear axle hub connector. Background technique [0002] With the development of the automobile industry, people's requirements for various performances of automobiles have been improved. Governments of various countries have increasingly strict regulations on energy conservation and environmental protection. Lightweight auto parts have become a trend. way. [0003] The rear axle hub connector used to fix the wheels of the truck rear axle is an important chassis part of the truck, and it is also developing in the direction of light weight. Typically, a rear axle hub connector has a generally cylindrical barrel with an axial bore for receiving the axle, an outer end oriented away from the axle, and an outer end oriented toward the axle. the inner end. The inner surface of the axial bore includes: an outer bearing cup for holding the outer bearing a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60B35/00B22C9/24B22D18/04
CPCB22C9/24B22D18/04B60B35/00
Inventor 王向东
Owner YINYI GRP CO LTD
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