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Method for manufacturing high-precision longitudinal shearing strip splitting tool blade

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

Active Publication Date: 2014-04-09
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] The method for preparing a high-precision slitting blade of this embodiment includes the following specific steps:

[0045] Step 1. Raw material preparation of slitting blade:

[0046] First cut the circular cross-section blank into a cylindrical blank with a height of 100mm, and then put the cut cylindrical blank into a heating furnace and heat it to 950°C, the heating rate is 15°C / min, and the temperature is raised to 950°C after heat preservation 2 After hours, the heat preservation is over and out of the furnace for forging, forming a forging blank with a height of 15mm and an outer diameter of 350mm. The components of the forging blank in the present invention are calculated by weight percentage: C: 0.88 to 1.10%, Si: 0.20 to 0.40%, Mn: 0.30 to 0.50%, Cr: 1.50 to 2.50%, Mo: 2.00 to 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 are Fe and unavoidable impurities; specifically the group of forging blanks in this embodiment Calculate...

Embodiment 2

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

[0067] The components of the forging blank in step one are 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 inevitable impurities.

[0068] In the heat treatment process of the slitting slitting blade in step 4, the quenching process: add industrial sodium nitrite in the nitrate furnace and heat up to 1100°C, the heating rate is 2°C / min, and the slitting process is heated to 1100°C. Put the strip blades into the nitrate furnace, and continue to heat the nitrate furnace to 1100°C and keep it for 10 minutes. When the slitting slitting blade is placed in the nitrate furnace, the slitting slitting blade will touch the industrial sodium nitrite to all The immersion time in industrial sodium nitrite is 18s; the tempering process: the first tempering temperature is 540℃, the temp...

Embodiment 3

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

[0072] The components of the forging blank in step one are 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 slitting blade in step 4, the quenching process: add industrial sodium nitrite in a nitrate furnace and heat up to 1080°C at a heating rate of 2°C / min. After heating up to 1080°C, the slitting Put the strip blades into the nitrate furnace, and continue to heat the nitrate furnace to 1080°C and keep it warm for 20 minutes. When the slitting slitting blade is placed in the nitrate furnace, the slitting slitting blade is in contact with the industrial sodium nitrite to all The immersion time in industrial sodium nitrite is 20s; tempering process: the first tempering temperature is 570℃, the t...

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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, to a method for preparing a high-precision slitting blade. Background technique [0002] The sheet metal slitting machine relies on the slitting blades for slitting to roll on the sheet to complete the infinite cutting action on the sheet. Sheet metal slitting machine is used for longitudinal rolling shear of ordinary sheet metal, aluminum, stainless steel, silicon steel, etc. Slitting slitting blades are widely used in aerospace, automobile manufacturing, mining machinery, hardware manufacturing, home appliances and other industries. [0003] The slitting blade for slitting metal sheets has extremely high requirements on the material selection, heat treatment process, and wear resistance and impact resistance of the blade itself. At present, most tool manufacturers choose a kind of alloy tool steel as the raw material for the production of blades. Its composition is cal...

Claims

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Application Information

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