Near-net forming manufacturing process for hundred-ton special-shaped section ring forge piece

A technology of special-shaped section and manufacturing process, which is used in manufacturing tools, forging/pressing/hammering machinery, metal rolling, etc. The effect of production efficiency, reduction of production cost, and shortening of manufacturing cycle

Pending Publication Date: 2021-07-30
SHANDONG IRAETA HEAVY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above two applications are both manufactured in the form of free forging. At the same time, the above two applications are manufactured using special-shaped molds on the press equipment. The rings with special-shaped cross-sections are made by free forging. The manufacturing method is limited by the working space of the equipment. When the weight of the forging blank is nearly 150 tons , the forming is difficult, the forging times are many, and the forging allowance is large, and the material utilization rate is low, resulting in a long production and processing cycle

Method used

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  • Near-net forming manufacturing process for hundred-ton special-shaped section ring forge piece
  • Near-net forming manufacturing process for hundred-ton special-shaped section ring forge piece
  • Near-net forming manufacturing process for hundred-ton special-shaped section ring forge piece

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Embodiment example

[0017] The applicant undertakes the special-shaped cross-section replacement ring forgings of 14Cr1MoⅣ material ordered by a certain customer. The finished product diagram is shown in the attachment. Figure 6 . The rough weight of this product is about 160 tons, and the finished product weighs about 102.5 tons.

[0018] Implementation of the present invention comprises the following steps:

[0019] 1) Load the raw material steel ingots that have passed the inspection into the furnace according to the heating process, heat the temperature to 1250°C±10°C, and hold the heat for ≥10 hours. Punching and reaming processes are used to make cylindrical blanks;

[0020] 2) After the steel ingot is heated and kept warm, it is released from the furnace, and the preformed cylindrical blank is put into the mold of the hydraulic press according to the forging process on the 13,500-ton hydraulic press, and the hammer anvil of the hydraulic press cooperates with the rotating base to comple...

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Abstract

The invention discloses a near-net forming manufacturing process for a hundred-ton special-shaped section ring forge piece. The near-net forming manufacturing process comprises the following steps that (1) free forging cogging is conducted, specifically, after a raw material steel ingot is put into a furnace to be heated and subjected to heat preservation, the steel ingot is placed on a workbench of an oil press to be machined through a forging process, and then a cylindrical blank is manufactured; oil press mold forming; after cogging, carrying out fire heat treatment; rolling and forming by a ring rolling mill; performing positive and tempering heat treatment after the rolling; performing rough turning; performing nondestructive testing; quenching and tempering heat treatment, specifically, carrying out performance heat treatment on the forge piece; sampling detection, specifically, performing body sampling and mechanical property detection on the forge piece subjected to the performance heat treatment; conducting finish turning; and packaging and warehousing finished products. According to the near-net forming manufacturing process, the material utilization rate can be increased by about 15%, and the production cost is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of preparation of large-scale replacement ring forgings, in particular to a near-net-shaping manufacturing process for ring forgings with special-shaped cross-sections of a hundred tons. Background technique [0002] The marine hydraulic piling hammer is the key equipment for marine engineering construction such as offshore wind power pipe piles, offshore platforms, bridges, etc., and the replacement ring is the core component of the offshore hydraulic piling hammer. The replacement ring forging used for processing the replacement ring is a special-shaped cross-section For ring forgings, the largest finished product weighs nearly 100 tons. The material used is high-alloy steel, and the performance requirements are strict, making it extremely difficult to manufacture. With the rapid development of offshore wind power in recent years, the demand for marine hydraulic piling hammers has shown explosive growth. H...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21H1/06B21H1/00B21J5/00B21J13/02
CPCB21H1/06B21H1/22B21J5/002B21J13/02
Inventor 郑永强徐延续陈凯任秀凤银伟赵兴明赵丽美刘兰潇赵方娜
Owner SHANDONG IRAETA HEAVY IND
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