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High-strength gear processing technology

A technology of high-strength gears and processing technology, which is applied in the direction of gears, manufacturing tools, and other manufacturing equipment/tools. It can solve the problems that the strength of a single tooth cannot be achieved, and achieve good core toughness, hard surface hardness, and material grain structure. dense effect

Active Publication Date: 2015-12-30
无锡市神力齿轮冷挤有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The gears (2 modules) it produces cannot reach the single-tooth strength of 28000N after testing

Method used

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  • High-strength gear processing technology
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  • High-strength gear processing technology

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Embodiment 1: a high-strength gear processing technology, including the following process steps:

[0026] (1) 20CrMnTi alloy steel round blanks are selected as raw materials, which have high strength and toughness, and relatively good hardenability. After carburizing, quenching and tempering, the surface is hard and the core has good toughness;

[0027] (2) Grinding the outer circle: removing fine cracks on the surface of the round billet and improving the surface finish;

[0028] (3) Annealing: Treat the round billet at a temperature of 870°C for 10 hours, then cool it to 360°C with the furnace, and take it out of the furnace; the function of annealing is to soften the metal;

[0029] (4) Shot blasting: After the round billet is annealed, it is shot blasted for 10 minutes to remove residual substances on the surface of the round billet, such as scale, etc.;

[0030] (5) Surface treatment: Treat the round billet in phosphating solution and saponification solution respe...

Embodiment 2

[0037] Embodiment 2: A high-strength gear processing technology, comprising the following process steps:

[0038] (1) 20CrMnTi alloy steel round blanks are selected as raw materials, which have high strength and toughness, and relatively good hardenability. After carburizing, quenching and tempering, the surface is hard and the core has good toughness;

[0039] (2) Grinding the outer circle: removing fine cracks on the surface of the round billet and improving the surface finish;

[0040] (3) Annealing: Treat the round billet at a temperature of 890°C for 8 hours, then cool it to 360°C with the furnace, and then take it out of the furnace; the function of annealing is to soften the metal;

[0041] (4) Shot blasting: After the round billet is annealed, it is shot blasted for 15 minutes to remove residual substances such as scale on the round billet surface;

[0042] (5) Surface treatment: Treat the round blank in phosphating solution and saponification solution respectively to...

Embodiment 3

[0049] Embodiment three: a high-strength gear processing technology, including the following process steps:

[0050] (1) 20CrMnTi alloy steel round blanks are selected as raw materials, which have high strength and toughness, and relatively good hardenability. After carburizing, quenching and tempering, the surface is hard and the core has good toughness;

[0051] (2) Grinding the outer circle: removing fine cracks on the surface of the round billet and improving the surface finish;

[0052] (3) Annealing: Treat the round billet at a temperature of 880°C for 9 hours, then cool it to 370°C with the furnace, and then take it out of the furnace; the function of annealing is to soften the metal;

[0053](4) Shot blasting: After the round billet is annealed, it is shot blasted for 12 minutes to remove residual substances such as oxide skin on the surface of the round billet;

[0054] (5) Surface treatment: Treat the round blank in phosphating solution and saponification solution r...

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Abstract

The invention relates to a high-strength gear processing process which is characterized by comprising the following steps: (1) selecting a 20CrMnTi alloy steel round blank as a raw material; (2) performing external grinding on the round blank to remove fine cracks on the surface; (3) annealing the round blank and performing shot blasting; (4) processing the round blank in a phosphating solution and a saponifying solution respectively; (5) performing plastic deformation on the round blank through an extrusion material to obtain a blank with an involute tooth profile at one end and a smooth cylindrical body at the other end; (6) performing plastic deformation on the blank obtained from the step (5) through the extrusion material to obtain a blank with an involute tooth profile at one end and an annular convex edge at the other end; (7) lathing an inner hole in the center of the blank; (8) performing carburizing and quenching treatment on a workpiece; (9) performing tempering treatment on the workpiece; (10) performing shot blasting. A gear obtained by the process is high in hardness of surface and good in flexibility of a core part, and the single-tooth strength of the gear (2module) is improved.

Description

technical field [0001] The invention relates to a gear processing technology, in particular to a high-strength gear processing technology. Background technique [0002] After decades of development, my country's auto industry has made great progress. In order to keep up with the technical development and supporting needs of the internal combustion engine, electric motor and electrical industry, it is necessary to adapt to the development trend of smaller volume, lighter weight and higher output power. The transmission gear is an automotive safety part, which requires high impact toughness and destructive strength. The single tooth strength of the gear (2 modulus) is required to be greater than 28000N. [0003] The traditional processing process of gears is: forging billet (45 steel) - normalizing or quenching and tempering - machining (the gear part adopts the gear hobbing process, and the metal flow line of the tooth shape part is connected with the center fracture (such a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P23/04B21D53/28
CPCB23P15/14
Inventor 王维涛王建江
Owner 无锡市神力齿轮冷挤有限公司
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