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Method for directly producing ring parts by centrifugal casting and cold rolling

A technology of centrifugal casting and ring parts, which is applied in the field of direct production of ring parts by centrifugal casting and cold rolling, can solve the problems of unfavorable energy saving and emission reduction, low production efficiency, and high energy consumption, and achieve material saving, production efficiency improvement, The effect of shortening the process flow

Inactive Publication Date: 2013-01-16
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The production of seamless steel pipes requires perforation, rolling, heating, etc., which has many processes, low production efficiency, and consumes a lot of energy, which is not conducive to energy saving and emission reduction; when using seamless steel pipes to produce rings, it is necessary to cut off the head and tail, which wastes materials

Method used

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  • Method for directly producing ring parts by centrifugal casting and cold rolling
  • Method for directly producing ring parts by centrifugal casting and cold rolling

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Experimental program
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Embodiment Construction

[0018] Production as figure 1 The bearing ring shown has an outer diameter of Φ100mm, an inner diameter of Φ80.12mm, and a height of 25mm. The material used is 42CrMo steel. The size of the cast tube is Φ80.2mm with an outer diameter of Φ61.6mm and a length of 3m.

[0019] The process steps are:

[0020] ①Melting the alloy in an intermediate frequency furnace at a temperature of 1700℃;

[0021] ②Use the LF ladle refining furnace to refine the molten steel outside the furnace, the refining temperature is 1690℃, and the bottom blowing argon gas is stirred for deoxidation and desulfurization;

[0022] ③Pour the refined 1555℃ molten steel into a horizontal centrifuge and cast it into a tube, the speed is 20r / s, the pouring time is 5s, and the tube mold is drawn when it is cooled to 500℃. The size of the casting tube is Φ80.2mm. The inner diameter is Φ61.6mm and the length is 3m;

[0023] ④The cast pipe is automatically sawed and cut by a steel pipe blanking machine, and sawed into a r...

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Abstract

The invention discloses a method for directly producing ring parts by centrifugal casting and cold rolling, which belongs to the technology field of production of the ring parts. The method is characterized in that the technology process is as follows: (1) melting alloy by an intermediate frequency furnace at the temperature of 1700 DEG C; (2) externally refining by a low frequency (LF) ladle refining furnace at the temperature of 1680-1700 DEG C, carrying out bottom blowing argon, and stirring, deoxidizing and desulfurizing; (3) pouring the refined molten steel of 1550-1560 DEG C into a horizontal centrifuge for the centrifugal casting; (4) sawing by a steel pipe blanking machine and blanking; (5) rolling ring blanks at the room temperature on a precise cold rolling machine, wherein during rolling, the feed rate of each turn must be not less than the minimum feed rate v min of each turn needed by forging penetration of the ring parts, and is also not more than the maximum feed rate v max of each turn allowed by biting of the ring parts, the rolling ratio of the ring parts is selectable for 1.1 to 1.5, and the ring parts are processed into the required shape and dimension; (6) quenching and tempering conventionally the ring parts; and (7) precisely shaping the ring parts conventionally. The method can improve production efficiency, and save the energy and materials.

Description

Technical field [0001] The invention belongs to the technical field of ring production, and specifically relates to a method for directly producing rings by using centrifugal casting and cold rolling. Background technique [0002] Bearings and other ring parts play an important role in daily life. At present, the typical process for producing small bearing outer rings, flanges and other ring parts at home and abroad is mainly to use seamless steel pipe sawing and cold rolling. The process is :Seamless steel tube→saw cutting→cold rolling→heat treatment→precision shaping. The production of seamless steel pipes requires piercing, pipe rolling, heating, etc., with many processes, low production efficiency, and more energy consumption, which is not conducive to energy saving and emission reduction; when using seamless steel pipes to produce rings, it is necessary to cut off the head and tail, which wastes materials . Summary of the invention [0003] The purpose of the prese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00B22D13/00
Inventor 巨丽曹争争李永堂
Owner TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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