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Method for manufacturing bearing ring by adopting centrifugal casting technique

A technology of centrifugal casting and bearing rings, which is applied in the field of manufacturing bearing rings. It can solve the problems of large blank allowance and waste of raw materials, and achieve the effects of small machining allowance, improving efficiency and saving raw materials.

Inactive Publication Date: 2009-09-16
HAICHENG ZHONGXING HEAVY MACHINERY
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Problems solved by technology

[0002] At present, in the process of large-scale billet making of bearing rings, large-scale bearing manufacturers generally adopt the following process: firstly, steel ingots are cast, and then forged to make blanks. This process leaves a large blank margin, resulting in raw materials. big waste

Method used

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Embodiment Construction

[0018] 1. Raw material preparation: including scrap steel, alloy and other furnace materials for preheating and drying, the preheating temperature is 150-300°C.

[0019] 2. When the molten steel is smelted to 1640-1680℃, it is calmly released from the furnace, and then enters the LF furnace for refining to ensure the purity of the molten steel.

[0020] 3. Centrifugal pouring

[0021] 1. Preparation of iron molds and fixtures: check whether the pins are fastened and whether the paint is intact, and heat the iron molds to 180-220°C before pouring.

[0022] 2. Start-up of the centrifuge: smooth operation, depending on the production specifications, the speed of the iron mold is different, and the general gravity coefficient is controlled between 50 and 60.

[0023] 3. Centrifugal pouring adopts pouring and moving type. The pouring temperature is controlled at 1640-1680°C, and the pouring time is 5-10 minutes. After pouring, the surface protection slag is added, and the iron mol...

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Abstract

The invention relates to a method for manufacturing a bearing ring by adopting a centrifugal casting technique, wherein the preheating temperature of charging materials is between 150 and 300 DEG C; the gravity coefficient for the start-up of a centrifugal machine is controlled to be between 50 and 60; and the centrifugal pouring adopts a bottom pouring type and a movable type, the pouring temperature is controlled to be between 1,640 and 1,680 DEG C, and the pouring time is between 5 and 10 minutes. Compared with the prior art, the method has the advantages of reducing the admittance, saving raw materials, reducing the cost effectively, and improving the benefits of enterprises.

Description

technical field [0001] The invention relates to a method for manufacturing a bearing ring, in particular to a method for manufacturing the bearing ring by centrifugal casting technology. Background technique [0002] At present, in the process of large-scale billet making of bearing rings, large-scale bearing manufacturers generally adopt the following process: firstly, steel ingots are cast, and then forged to make blanks. This process leaves a large blank margin, resulting in raw materials. Big waste. Contents of the invention [0003] The purpose of the present invention is to provide a method for manufacturing bearing rings by using centrifugal casting technology to reduce machining allowance and save raw materials. [0004] To achieve the above object, the present invention adopts the following technical solutions: [0005] A method of manufacturing a bearing ring by centrifugal casting technology, the method comprising the following steps: [0006] 1) Raw material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D13/12B22C3/00C22C38/44C22C38/22
Inventor 王相丰王生何泉义韩本松董志海
Owner HAICHENG ZHONGXING HEAVY MACHINERY
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