Bearing holder near net shape casting method

A bearing cage and near-net-shape technology, which is applied in the direction of casting molding equipment, casting molds, casting mold components, etc., can solve the problems of low metal utilization rate, achieve the effects of improving production efficiency, reducing production costs, and good crystallization effect

Inactive Publication Date: 2008-09-17
吴成玉
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Problems solved by technology

[0003] The purpose of the present invention is to propose a near-net-shape casting method for bearing cages, which solves the problems of low metal utilization caused by integral casting of thick casing blanks

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Embodiment Construction

[0029] The near-net-shape casting method of the bearing cage of the present invention can approximately cast the support arm of the cage and the prototype of the pocket hole, leaving only a small amount of machining allowance required for the lathe to correct the shape and the pocket hole processing between the support arms. Clean shape casting. To optimize the casting forming method, adopt simple and practical casting technology (rather than investment casting, die casting, squeeze casting and other complex processes) to make the casting close to the final shape and dimensional accuracy of the part, improve production efficiency, reduce production cost, and realize Large-scale industrial production. Its main technical points are:

[0030] 1) As shown in Figure 1-3, the shape of the cage is made to be close to the shape and dimensional accuracy of the final part, and the shape is divided horizontally. Install (multi-piece arrangement) quick-change molds to ensure the strengt...

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Abstract

The invention relates to a casting technology for bearing retainers, in particular to a near-net-shape casting technology for bearing retainers, which solves the problem of low using rate of metals when thick bushing roughcasts are integrally cast and is suitable for casting bearing retainers by use of ductile iron and nonferrous alloys. The casting technology comprises the following steps: (1) the foam patterns are made into dies with shape and size close to the final parts; and a back draft upper flask with integrated modeling and exhausting functions is adopted; (2) after mould closing and sealing treatment on a low-pressure die-casting machine, mold filling and casting are carried out; when casting, the vacuum evacuation valve connected with the evacuation box is opened first for vacuum pumping of the cast cavity, and then grade turbocharged process is used for filling and casting, so as to keep the castings stay at a conditions surrounded by continuous supplement of liquid metal from the pouring basin and lift tube under a high pressure until near-net-shape castings are obtained after full solidification. The casting technology has the advantages that the using rate of metal is improved to 85% to 90% from 15% to 20% and the aims for green casting, cleaner production and sustainable development in accordance with the national standards are realized.

Description

technical field [0001] The invention relates to a casting technology for a bearing cage, in particular to a near-net-shape casting method for a bearing cage. Background technique [0002] At present, the large and medium-sized (or high-speed and heavy-duty) bearing cages used in the domestic bearing manufacturing industry have always followed the backward production process of casting thick casing blanks first, and then processing all the turning shapes and pockets (ie boring holes) on a lathe. The metal utilization rate is only about 15-20%, and 5-6 tons of castings are required to produce 1 ton of finished cages, which not only has high production costs, but also consumes energy materials. The production of ductile iron cages also emits a large amount of graphite dust during processing, which seriously pollutes the environment and endanger personal health. However, investment (precision) casting, die casting, and squeeze casting are used, and the process is relatively com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D19/06B22C3/00
Inventor 徐永良吴镇
Owner 吴成玉
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