Manufacturing method of steel ratchet wheel

A ratchet and steel technology, which is applied to mechanical equipment, components with teeth, belts/chains/gears, etc., can solve the problems of easy generation of transition scale, large labor costs, large material loss, etc., and achieve mechanical properties Improve, save product materials, improve the effect of mold life

Inactive Publication Date: 2014-01-15
MAANSHAN YIHUA HYDRAULIC MACHINES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] A ratchet is a wheel with a toothed surface or a frictional surface. It is pushed by the pawl to make a stepping motion. Since the steel ratchet is processed, the tooling equipment must be adjusted according to the length of the shaft. The traditional process method is overall heating.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0027] A method for preparing a steel ratchet includes the following steps:

[0028] a. Steps of pouring Φ120×47mm rod-shaped blanks

[0029] The weight percentage of chemical composition in the rod-shaped blank is: C 0.24-0.40%, Mn 1.2-2.0%, Si 0.7-1.3, Cr 0.4-1.2%, W 0.42-0.8%, M0 0.4-0.8%, Al 0.04-0.2%, Cu 0.22~0.52%, P≤0.033%, S≤0.035%, the remainder is Fe and unavoidable impurities; the temperature of the casted rod-shaped billet is reduced to 340℃, and then heated to 700-750℃, heat preservation 3-5 After hours, the furnace is cooled to 250°C, holding for 4-5 hours, then heating to 600-650°C, holding for 5-6 hours, cooling to 400°C at 45°C / hour, and then cooling to 140°C at 25°C / hour;

[0030] b. Machining steps

[0031] 1. Rough turning, rough turning of inner hole to Φ60mm, 0.5mm margin for other dimensions, and inner hole chamfering Φ80mm×120°;

[0032] 2. Fine turning, the inner hole is fine turning and the outer circle is bright, and the other dimensions are finely turned i

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PUM

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Abstract

The invention discloses a manufacturing method of a steel ratchet wheel. The manufacturing method of the steel ratchet wheel comprises the following steps that rod-shaped blanks with the diameter being 120*47mm are manufactured in a pouring mode, and the chemical components of the rod-shaped blanks comprise, by weight, 0.24-0.40% of C, 1.2-2.0% of Mn, 0.7-1.3% of Si, 0.4-1.2% of Cr, 0.42-0.8% of W, 0.4-0.8% of Mo, 0.04-0.2% of Al, 0.22-0.52% of Cu, not more than 0.033% of P, not more than 0.035% of S, and balance Fe and other unavoidable impurities; the temperature of rod-shaped blanks formed in the pouring mode is reduced to 340 DEG C, the rod-shaped blanks are heated to 700-750 DEG C, the temperature is kept for 3-5 hours, a furnace is cooled to 250 DEG C, the temperature is kept for 4-5 hours, and then the rod-shaped blanks are heated to 600-650 DEG C, the temperature is kept for 5-6 hours, the rod-shaped blanks are cooled to 400 DEG C at the speed of 45 DEG C/h, and then the rod-shaped blanks are cooled to 140 DEG C at the speed of 25 DEG C/h. The manufacturing method of the steel ratchet wheel is beneficial to large-batch industrial production of the steel ratchet wheels, reduces the phenomena of dirt adulteration and insufficient filling, further improves the mechanical performance of products, saves materials of the products, and prolongs the service life of moulds of the products.

Description

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Claims

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Application Information

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Owner MAANSHAN YIHUA HYDRAULIC MACHINES
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