Method for making hammer stem for forging equipment

A manufacturing method and technology of forging equipment, which are applied in forging/pressing/hammer devices, manufacturing tools, heat treatment equipment, etc., can solve the problems of difficult control of metallurgical composition, low service life of hammer rods, and poor mechanical properties of steel billets. Easy to quench cracks, not easy to quench cracks, good mechanical properties

Active Publication Date: 2007-05-16
CHONGQING CHANGZHENG HEAVY IND
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Problems solved by technology

The steel ingot is generally made of electric furnace steel, whose metallurgical composition is not easy to control, and the mechanical properties of the steel billet obtained when the deformation is insufficient are poor, and there are often metallurgical defects; there is no temperature and time control during heating, and the randomness is large; heat treatment is usually normal tempering Quenching and tempering with K oil
The service life of the hammer shaft obtained by this method is low, and the average number of strikes is less than 23,000 times

Method used

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  • Method for making hammer stem for forging equipment
  • Method for making hammer stem for forging equipment

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Embodiment Construction

[0022] Taking the manufacture of a 10-ton hammer rod for forging equipment as an example, according to the process shown in Figure 1, the specific manufacturing process is as follows:

[0023] (1) Material selection, steel ingots, rolled materials or forged materials obtained by ladle refining or electroslag remelting process are selected as forging blanks, the utilization rate of steel ingots should reach 75% to 77%, the forging ratio of rolled materials and forged materials It should be ≥5, and its ultrasonic flaw detection defect equivalent should be ≤φ2. The principle of material selection is to make the optimal choice according to the above requirements under the guidance of the design department, according to the tonnage of the equipment and the characteristics of the process operation, with due consideration of the manufacturing quality and cost.

[0024] (2) Heating, put the forging blank into the furnace when the furnace temperature is ≤600°C, carry out the first stag...

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Abstract

The invention relates to a method for producing hammer rod in forge device, wherein it comprises selecting material, forging, thermal treatment, rough treatment, defect detection, adjusting material, and fine treatment. The invention uses steel block, rolling material or forge material refined from steel pack or slag fusion technique. The invention uses gradient heating, multistage thermal insulation to heat, and uses hydraulic machine to forge, and it has defect detection after rough treatment to select different adjustments, therefore, the final metal phase and mechanical property can reach best. The invention can improve the service life of hammer rod, while the average hammer times can reach 300 thousand.

Description

technical field [0001] The invention belongs to the technical field of forging equipment, and in particular relates to a method for manufacturing a hammer rod on the forging equipment. Background technique [0002] The hammer shaft is one of the important parts of the forging equipment, especially the hammer shaft of the die forging hammer, free forging hammer and electro-hydraulic hammer with impact characteristics, must have sufficient strength, impact toughness and surface hardness. In the work, the hammer shaft is required to have uniform mechanical properties along the axial direction, with excellent internal quality and certain thermal strength. During the continuous reciprocating vertical movement, the hammer rod often breaks suddenly, causing production to stop and maintenance costs to increase. Due to the strict technical requirements for hammer shaft manufacturing, long production cycle and high manufacturing cost, the service life of the hammer shaft will directl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P23/04C21D11/00C21D9/00C21D9/70B21J1/06B21J7/00
Inventor 刘英贵向小琴龚超彭必胜
Owner CHONGQING CHANGZHENG HEAVY IND
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