Integral quenching type land leveller blade manufacturing method and quenching die

An overall quenching and grader technology, which is applied in the direction of quenching devices, manufacturing tools, furnace types, etc., can solve the problems that affect the reliability of the grader, the service life of the blade is not long, and affect the quality of the road surface, so as to improve the reliability of the whole machine Sex and construction efficiency, high production efficiency, and the effect of saving production time and manufacturing cost

Inactive Publication Date: 2008-10-15
SANY HEAVY IND CO LTD (CN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of heat treatment process is not only time-consuming and labor-intensive to operate, but also has poor results. The service life of the produced blades is not long. After the surface quenching layer is worn, the remaining part of the blade is more worn during work, and it is easy to produce edge curling. Seriously affect the quality of the road surface, cannot be used normally, and affect the reliability of the motor grader

Method used

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  • Integral quenching type land leveller blade manufacturing method and quenching die
  • Integral quenching type land leveller blade manufacturing method and quenching die
  • Integral quenching type land leveller blade manufacturing method and quenching die

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: A kind of overall quenching process of the shovel blade of a grader. The blade material is 65Mn alloy steel. First, the 65Mn raw material is processed into a shovel blade of a grader, and then the blade is hot-pressed, integrally quenched and tempered. The specific steps For: (1). Hot press forming, overall quenching: heat the blade to 800°C and put it into the quenching mold, press the quenching mold with a pressure machine to the set pressure parameter of 3.0×10 6 ~4.0×10 6 N, and then pass quenching oil with a temperature of 20°C into the quenching mold to quench the blade; hot pressing forming and overall quenching are completed at the same time; (2). Tempering treatment: put the blade that has completed step 1) into the back In the furnace, after heating to 280°C, keep it warm for 120 minutes, and then take it out of the furnace and air cool. The grader shovel blade hardness after the above treatment is 52-57HRC.

[0030] The quenching die used in t...

Embodiment 2

[0031] Example 2: First process the 65Mn raw material into a grader shovel blade, and then perform hot-press forming, overall quenching and tempering treatment. The specific steps are: (1). Hot-press forming, overall quenching: after the blade is heated to 810°C Put it into the quenching mold, press the quenching mold with a pressure machine to the set pressure parameter 3.0×10 6 ~4.0×10 6 N, and then pass quenching water with a temperature of 30°C into the quenching mold to quench the blade; hot pressing forming and overall quenching are completed at the same time; (2). Tempering treatment: put the blade that has completed step (1) into the back In the furnace, after heating to 400°C, keep it warm for 100 minutes, and then take it out of the furnace and air cool. The grader blade hardness after the above treatment is 43-48HRC.

[0032] The quenching die used in this embodiment, such as Figure 5 Shown, comprise upper mold 7, lower mold 8, upper mold holder 5 and lower mold...

Embodiment 3

[0033] Example 3: first process the 65Mn raw material into a grader bulldozer blade, and then carry out hot pressing forming, overall quenching and tempering treatment. The specific steps are: 1 hot pressing forming, overall quenching: heat the blade to 820°C and put into the quenching mold, press the quenching mold with a pressure machine to the set pressure parameter of 2.0×10 6 ~3.0×10 6 N, and then pass into the quenching mold with quenching water at a temperature of 40°C to quench the blade; hot pressing forming and overall quenching are completed simultaneously; 2 Tempering treatment: put the blade that has completed step 1) into the tempering furnace, heat After reaching 430°C, keep it warm for 90 minutes, and then take it out of the furnace to air cool. The hardness of the grader blade after the above treatment is 40-45HRC.

[0034] The quenching die used in this embodiment, such as Figure 6Shown, comprise upper mold 7, lower mold 8, upper mold holder 5 and lower m...

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PUM

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Abstract

The invention discloses an entirety quenching grader blade making method and the quenching module. The thermal process includes the following steps: hot pressing to forming at the same time of taking entirety quenching to the blade, locating blade between upper mould and down mould after heating, adjusting the blade location, pressing to the set value by pressing machine, injecting quenching liquid into quenching furnace, flowing toward to blade to take entirety quenching and finishing molding; putting the blade into furnace to heat and insulate, taking out for cooling. The quenching mould includes upper mould, down mould, upper mould base and down mould base. The invention could be used to produce excellent and long useful life grader blade.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a grader blade. Background technique [0002] At present, the heat treatment process methods commonly used at home and abroad for grader blades are all based on local surface quenching, which makes the blades prone to deformation during heat treatment. Such as figure 1 , figure 2 As shown, the existing motor grader blade includes a blade body 1, a firmware hole 2, one side of the two long sides of the blade body is set as a blade 3, and the other side is set as a heat treatment anti-deformation side 4. During the heat treatment process, select a local area quenching treatment on the heat treatment anti-deformation edge 4 based on experience, and then quench the entire surface of the blade 3 . Due to the asymmetry of the blade structure, the quenching area is inconsistent, and the internal structure and residual stress of each batch of materials are different, the control ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D9/00C21D1/18C21D1/62C21D11/00
CPCC21D1/673
Inventor 许小球欧少球易全旺
Owner SANY HEAVY IND CO LTD (CN)
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