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Processing method of external thread of roll shaft head

A processing method and roll shaft technology, which are applied in the direction of manufacturing tools, metal material coating processes, furnaces, etc., can solve problems such as shortening the service life of shafts, and achieve the effects of reducing processing volume, reducing heat treatment deformation, and ensuring processing hardness.

Active Publication Date: 2020-05-01
JIANGSU HEFUTE GEAR MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] There is a locking external thread on the head of the roll shaft used in the rolling line of the steel mill. It is a stressed part and is often worn, resulting in a reduction in the service life of the entire shaft. If the wear can be slowed down, the life of the shaft will be extended

Method used

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Embodiment Construction

[0022] The present invention will be further described in conjunction with specific embodiment now.

[0023] A method for machining an external thread of a roll head, comprising the following steps:

[0024] ①. During semi-finishing, the thread is not turned, and the outer circle is left with a margin of 2-4mm;

[0025] ②. Enter the carburizing furnace for carburizing; ensure an effective carbon layer;

[0026] ③. Turn the outer circle, leave a margin of 0.5-1.5mm for the outer circle, and do not turn the thread;

[0027] ④. Quenching the outer circle of the thread, the surface hardness is not lower than HRC42;

[0028] ⑤. Turn the outer circle to the requirements of the drawing, and after confirming the size of the outer circle; change to a special high-hardness ceramic blade, turn the thread to the requirements of the drawing, enter the tool in multiple times, and measure with three needles in the middle to ensure the final thread size;

[0029] ⑥. After the thread proces...

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PUM

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Abstract

The invention relates to a machining method for an external thread of a spindle head of a roller. The machining method comprises the following steps that the thread is not turned during semi-finishing, and the allowance of 2-4 mm is reserved for the external circle; the spindle head enters a carburizing furnace for carburizing; the external circle is turned, the allowance of 0.5-1.5 mm is reservedfor the external circle, and the thread is not turned; quenching treatment is conducted on the external circle of the thread, and the surface hardness is no less than HRC42; the external circle is turned till meeting the drawing requirement, after the external circle dimension is confirmed, a high-hardness special ceramic blade is adopted to turn the thread till meeting the drawing requirement, the blade is fed many times, three-needle measurement is conducted during blade feeding, and the final thread dimension is ensured; and after the thread is machined, burrs are removed through a small file, and final check is performed through a general ruler. Through process adjustment, thermal treatment deformation is reduced, the machining amount is reduced, and the machining hardness is ensured.

Description

technical field [0001] The invention relates to a method for processing the external thread of a roll shaft head. Background technique [0002] There is a locking external thread on the head of the roll shaft used in the rolling line of the steel mill. It is a stressed part and is often worn, resulting in a reduction in the service life of the entire shaft. If the wear can be slowed down, the life of the shaft will be extended. The most effective way to slow down thread wear: increase thread hardness and increase thread wear resistance. Contents of the invention [0003] The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art and provide a method for processing the external thread of the roll shaft head. [0004] The technical solution adopted by the present invention to solve the technical problem is: a method for processing the external thread of the roll shaft head, comprising the following steps: [0005] ①. Durin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00C21D1/18C21D1/60C21D9/00C23C8/66
Inventor 宋廷钱江王福龙
Owner JIANGSU HEFUTE GEAR MFG