Processing method for rolling scissors with high abrasion resistance and strong shock resistance

A technology with high wear resistance and impact resistance, applied in the field of tool processing, can solve the problems of poor wear resistance and impact resistance and poor service life, achieve tight material organization, increase wear resistance and strong impact toughness, prevent The effect of grain growth

Inactive Publication Date: 2013-04-03
MAANSHAN HENGLIDA MACHINE BLADE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of the rolling scissors in the prior art in terms of comprehensive performance such as wear resistance and impact resistance and poor service life, and to provide a rolling scissors processing machine with high wear resistance and strong impact resistance. Method, adopting the method of the present invention, the comprehensive properties such as wear resistance and impact resistance of the rolling scissors are significantly improved, and the service life is increased from the original single-piece cutting of less than 200 tons of metal plates to more than 400 tons of metal plates

Method used

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  • Processing method for rolling scissors with high abrasion resistance and strong shock resistance
  • Processing method for rolling scissors with high abrasion resistance and strong shock resistance
  • Processing method for rolling scissors with high abrasion resistance and strong shock resistance

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Experimental program
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Effect test

Embodiment 1

[0043] (1) Preparation of raw materials for rolling scissors:

[0044] Rolling scissors are made from forged blanks. The components of the forged blanks used in the present invention are calculated by weight percentage: C: 1.40-1.60%, Si: ≤0.60%, Mn: ≤0.60%, P: ≤0.030%, S: ≤0.030%, Cr: 11.00-13.00%, Mo: 0.70-1.20%, V: 0.5-1.10%, rare earth: 0.30-0.50%, W: 3.0-3.5%, Nb: 0.10-0.30%, the rest is Fe, The material has high hardenability, and the addition of rare earth, W, Nb and other elements in this steel can effectively prevent the growth of austenite grains and make the material structure more compact, thereby increasing the wear resistance and strong impact toughness. The composition of the forged blank used in this example is calculated by weight percentage: C: 1.50%, Si: 0.50%, Mn: 0.55%, P: 0.020%, S: 0.020%, Cr: 12.00%, Mo: 0.95 %, V: 0.80%, rare earth: 0.40%, W: 3.3%, Nb: 0.20%, and the rest is Fe; it is worth noting that the rare earth referred to in the present inventi...

Embodiment 2

[0073] In this embodiment, the components of the forged blank in step (1) are calculated by weight percentage: C: 1.40%, Si: 0.60%, Mn: 0.60%, P: 0.030%, S: 0.030%, Cr: 13.00%, Mo: 0.70%, V: 1.10%, rare earth: 0.30%, W: 3.5%, Nb: 0.10%, and the rest is Fe;

[0074] The annealing temperature in step (2) is 940°C;

[0075] The heat treatment process of step (4) is as follows: ①Annealing: heat the rolling scissors to 600°C, hold for 2 hours, cool to 500°C with the furnace, and then take out the furnace and air cool; ②Quenching: After secondary annealing and air cooling, heat the rolling scissors To 600°C, keep warm for 20 minutes for the first preheating, after uniform temperature rise to 850°C, then keep warm for 30 minutes for the second preheating, finally raise the temperature to 1040°C, keep warm for 25 minutes, take out the furnace and quench in oil; ③ Tempering : Tempering treatment is carried out after quenching, the tempering temperature is 500°C, and the holding time i...

Embodiment 3

[0079] In this embodiment, the components of the forged blank in step (1) are calculated by weight percentage: C: 1.60%, Si: 0.53%, Mn: 0.54%, P: 0.030%, S: 0.020%, Cr: 11.00%, Mo: 1.20%, V: 0.5%, rare earth: 0.50%, W: 3.0%, Nb: 0.30%, and the rest is Fe;

[0080] The annealing temperature in step (2) is 960°C;

[0081] The heat treatment process of step (4) is as follows: ①Annealing: heat the rolling scissors to 650°C, hold for 2 hours, cool to 500°C with the furnace, and then air-cool; ②Quenching: After secondary annealing and air cooling, heat the rolling scissors To 600°C, hold for 20 minutes for the first preheating, after uniform temperature rise to 850°C, then hold for 30 minutes for the second preheating, and finally raise the temperature to 1020°C, hold for 40 minutes, and quench in oil; ③ Tempering : Tempering treatment is carried out after quenching, the tempering temperature is 520°C, and the holding time is 2 hours;

[0082] In step (6) cryogenic treatment, the ...

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Abstract

The invention discloses a processing method for rolling scissors with high abrasion resistance and strong shock resistance, belonging to the technical field of cutter processing. The processing method comprises the following steps of: (1) preparing the raw materials of rolling scissors; (2) carrying out annealing treatment of a forged blank at the annealing temperature of 940-960 DEG C; (3) rough processing of the forged blank; (4) heat processing which comprises annealing, quenching and tempering of the rolling scissors; (5) rough abrasion of the rolling scissors; (6) deep cooling of the rolling scissors, placing the rolling scissors in a liquid nitrogen deep cooling low temperature box at a temperature of minus 80 DEG C to minus 90 DEG C to be subjected to cooling treatment, and carrying out heat preservation for 1-1.5 hours; (7) secondary tempering of the rolling scissors at the tempering temperature of 500 DEG C, and carrying out heat preservation for 2 hours; and (8) fine processing of the rolling scissors. The rolling scissors prepared by the processing method are provided with a two-sided cutter point, the abrasion resistance and the shock resistance of the rolling scissors are further improved on the basis of material selection and processing technology, thus the rolling scissors are enabled to have remarkable performances of high abrasion resistance and shock resistance, and the requirement on cutting a hard board of a user is met.

Description

technical field [0001] The invention relates to the technical field of tool processing, and more specifically relates to a rolling scissors processing method with high wear resistance and strong impact resistance. Background technique [0002] The sheet metal slitting machine relies on the rolling scissors to roll on the sheet to complete the infinitely long shearing action of the sheet. The sheet metal slitting machine is used for longitudinal rolling shearing of ordinary metal sheets, aluminum sheets, stainless steel sheets, silicon steel sheets, etc. Rolling scissors are widely used in aerospace, automobile manufacturing, mining machinery, hardware manufacturing, home appliances and other industries. [0003] Rolling scissors for cutting metal sheets have extremely high requirements on the material selection, heat treatment process of the blade itself, as well as the wear resistance and impact resistance of the blade. At present, most cutting tool manufacturers choose a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/40C21D9/22C21D8/00
Inventor 张增明陈本真谢敏
Owner MAANSHAN HENGLIDA MACHINE BLADE
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