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Method for manufacturing hammer lever of electrohydraulic hammer

A manufacturing method and technology of electro-hydraulic hammer, which are applied in the direction of manufacturing tools, coatings, furnace types, etc., can solve the problems of breakage and failure of hammer rods, and achieve the effect of improving service life

Active Publication Date: 2010-11-24
CHONGQING CHANGZHENG HEAVY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The result is that the hammer shaft breaks and fails

Method used

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  • Method for manufacturing hammer lever of electrohydraulic hammer
  • Method for manufacturing hammer lever of electrohydraulic hammer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] as per figure 1 The flow shown, its manufacturing process is as follows:

[0037] (1) Material selection, the forging material obtained by electroslag steel smelting is selected as the forging blank, and the surface of the forging blank is peeled before flaw detection. The material of the forging material obtained by electroslag steel smelting is 42CrMo, which is mainly selected It has the following advantages: one is that the material cost is reduced by about 3 / 4, and the other is that the material has high strength, hardenability, good toughness, small deformation during quenching, and high creep strength and durability at high temperature; It is guaranteed that no cracks affecting the strength are allowed inside and on the surface of the forging blank, and no scratches are allowed on the surface, and the ultrasonic flaw detection defect equivalent should be ≤Ф2. The principle of material selection is to make the optimal choice according to the above requirements und...

Embodiment 2

[0050] as per figure 1 The flow shown, its manufacturing process is as follows:

[0051] (1) Material selection, the forging material obtained by electroslag steel smelting is selected as the forging blank, and the surface of the forging blank is peeled before flaw detection. The material of the forging material obtained by electroslag steel smelting is 42CrMo, which is mainly selected It has the following advantages: one is that the material cost is reduced by about 3 / 4, and the other is that the material has high strength, hardenability, good toughness, small deformation during quenching, and high creep strength and durability at high temperature; It is guaranteed that no cracks affecting the strength are allowed inside and on the surface of the forging blank, and no scratches are allowed on the surface, and the ultrasonic flaw detection defect equivalent should be ≤Ф2. The principle of material selection is to make the optimal choice according to the above requirements und...

Embodiment 3

[0063] as per figure 1 The flow shown, its manufacturing process is as follows:

[0064] (1) Material selection, the forging material obtained by electroslag steel smelting is selected as the forging blank, and the surface of the forging blank is peeled before flaw detection. The material of the forging material obtained by electroslag steel smelting is 42CrMo, which is mainly selected It has the following advantages: one is that the material cost is reduced by about 3 / 4, and the other is that the material has high strength, hardenability, good toughness, small deformation during quenching, high creep strength and durable strength at high temperature; after flaw detection, it should be guaranteed Any cracks affecting the strength are not allowed inside and on the surface of the forging blank, and scratches are not allowed on the surface, and the ultrasonic flaw detection defect equivalent should be ≤Ф2. The principle of material selection is to make the optimal choice accordi...

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PUM

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Abstract

The invention discloses a method for manufacturing a hammer lever of an electrohydraulic hammer, which is characterized by comprising the following steps of material section, heating, forging, normalizing treatment after forging, rough machining, flaw detection, corresponding tempering treatment, semifinishing, fine grinding, nitridation treatment, polishing, and the like, especially adopting a two-stage gas nitriding process which plays a key role in the prolongation of the service life of the hammer rod. The invention can greatly prolong the service life of the hammer level of the electrohydraulic hammer, and average hammering frequency is improved by 18 times or so from original 65,000 to 1,200,000 under the situation that other conditions are not changed.

Description

technical field [0001] The invention belongs to the technical field of forging equipment, in particular to a method for manufacturing a hammer shaft of an electro-hydraulic hammer. Background technique [0002] Electro-hydraulic hammer is a new generation of energy-saving equipment developed in recent years to replace steam hammer. Because of its advantages of saving energy, reducing consumption and not polluting the environment, it has been used by many professional forging manufacturers at home and abroad. However, electro-hydraulic hammers (especially free forging hammers) have a fatal weakness, that is, the service life of the hammer shaft is much lower than that of the steam hammer. [0003] Since the electro-hydraulic hammer uses the principle of flexible forging, the diameter of the hammer shaft is designed to be relatively thin (generally around φ70-90mm), which is twice as small as the diameter of the thick hammer shaft of the original steam hammer, and the weight ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00B21K5/00C21D8/00C21D9/00C23C8/24
Inventor 刘英贵郑兴东赖辉罗耀义
Owner CHONGQING CHANGZHENG HEAVY IND
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