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A preparation method of high-precision slitting and slitting blades

A slitting and slitting blade, high-precision technology, applied in the field of tool processing, can solve problems such as poor processing accuracy, achieve the effects of preventing grain growth, compact material structure, increasing wear resistance and strong impact toughness

Active Publication Date: 2016-04-13
ANHUI RISHENG MACHINERY MFG
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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 disadvantages of poor machining accuracy of slitting and slitting blades in the prior art, and provide a preparation method for high-precision slitting and slitting blades. The flatness can reach 0.001mm, the thickness tolerance can reach ±0.001mm, the hardness uniformity of the entire slitting and slitting blade is less than 1HRC, and it has excellent high wear resistance and strong impact resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A kind of preparation method of high-precision slitting and slitting blade of the present embodiment, its specific steps are:

[0045] Step 1. Preparation of raw materials for slitting and slitting blades:

[0046] First cut the circular cross-section billet into a cylindrical billet with a height of 100mm, then put the cut cylindrical billet into a heating furnace and heat it to 950°C with a heating rate of 15°C / min, heat it to 950°C and keep it warm for 2 hour, after the heat preservation finishes, it is out of the furnace for forging, and is forged into a forging blank with a height of 15mm and an outer diameter of 350mm. The components of the forged blank in the present invention are calculated by weight percentage: C: 0.88-1.10%, Si: 0.20-0.40%, Mn: 0.30-0.50%, Cr: 1.50-2.50%, Mo: 2.00-2.50%, V : 1.7~2.0%, P: ≤0.020%, S: ≤0.015%, Te: 0.04~0.05%, Zr: 0.01~0.02%, the rest is Fe and unavoidable impurities; the specific composition of the forged blank in this embodime...

Embodiment 2

[0066] The basic steps of this embodiment are the same as embodiment 1, the difference is:

[0067] The composition of the forged blank in step 1 is calculated by weight percentage: C: 1.10%, Si: 0.20%, Mn: 0.50%, Cr: 1.50%, Mo: 2.50%, V: 1.7%, P: 0.020%, S : 0.015%, Te: 0.04%, Zr: 0.02%, the rest is Fe and unavoidable impurities.

[0068]In the heat treatment process of the slitting and slitting blades in step 4, the quenching process: add industrial sodium nitrite in the nitrate furnace and heat up to 1100°C, and the heating rate is 2°C / min. Put the strip blades into the nitrate furnace, continue heating to 1100°C in the nitrate furnace, and keep it warm for 10 minutes. The time of immersion in industrial sodium nitrite is 18s; tempering process: the first tempering temperature is 540°C, and the tempering time is 4 hours. After the first tempering, the hardness value of the slitting and slitting blade is 60HRC , in line with the standard of 58 ~ 60HRC.

[0069] During the...

Embodiment 3

[0071] The basic steps of this embodiment are the same as embodiment 1, the difference is:

[0072] The composition of the forged blank in step 1 is calculated by weight percentage: C: 0.88%, Si: 0.40%, Mn: 0.30%, Cr: 2.50%, Mo: 2.00%, V: 2.0%, P: 0.015%, S : 0.012%, Te: 0.05%, Zr: 0.01%, the rest is Fe and unavoidable impurities.

[0073] In the heat treatment process of the slitting and slitting blades in step 4, the quenching process: add industrial sodium nitrite to the nitrate furnace and raise the temperature to 1080°C, and the heating rate is 2°C / min. Put the strip blades into the nitrate furnace, continue heating to 1080°C in the nitrate furnace, and keep it warm for 20 minutes. The time of immersion in industrial sodium nitrite is 20s; tempering process: the first tempering temperature is 570°C, and the tempering time is 4 hours. After the first tempering, the hardness value of the slitting and slitting blade is 58HRC , in line with the standard of 58 ~ 60HRC.

[0...

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Abstract

The invention discloses a method for manufacturing a high-precision longitudinal shearing strip splitting tool blade, and belongs to the technical field of tool machining. The method for manufacturing the high-precision longitudinal shearing strip splitting tool blade comprises the steps of (1) preparation of raw materials of the longitudinal shearing strip splitting tool blade; (2) annealing treatment on a forged blank; (3) rough machining on the forged blank; (4) heat treatment on the longitudinal shearing strip splitting tool blade, wherein the heat treatment on the longitudinal shearing strip splitting tool blade comprises the steps of annealing, quenching in a nitrate furnace and tempering in the nitrate furnace; (5) finish machining on the longitudinal shearing strip splitting tool blade, wherein the finish machining on the longitudinal shearing strip splitting tool blade comprises the steps of first time accurate grinding, second time accurate grinding and third time accurate grinding on a grinding machine. The flatness of the longitudinal shearing strip splitting tool blade manufactured and obtained through the method can reach 0.001mm, the thickness tolerance can reach + / -0.001mm, the hardness evenness of the whole longitudinal shearing strip splitting tool blade is smaller than 1HRC, and meanwhile the longitudinal shearing strip splitting tool blade has excellent high-wearing features and strong shock resistance performance, and meets the demands for splitting and cutting high-precision space flight and aviation plates for airplanes and the like.

Description

technical field [0001] The invention relates to the technical field of tool processing, and more specifically, relates to a preparation method of a high-precision slitting and slitting blade. Background technique [0002] The sheet metal slitting machine relies on the slitting and slitting blades 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. Slitting and slitting blades are widely used in aerospace, automobile manufacturing, mining machinery, hardware manufacturing, home appliances and other industries. [0003] The slitting and slitting blades 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 manu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/40C22C38/60C21D8/00C21D9/18
CPCB23P15/406C21D8/005C21D9/22C22C38/60
Inventor 刘云飞
Owner ANHUI RISHENG MACHINERY MFG