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Large cylindrical forge piece forging and rolling composite production technology

A rolling compounding and production process technology, applied in the field of large cylindrical forging forging rolling compounding production process, can solve the problems of complex free forging process, low production efficiency, high energy consumption, etc., and is beneficial to final forming and production. The effect of high efficiency and low energy consumption

Inactive Publication Date: 2018-12-14
LANZHOU LS ENERGY EQUIP ENG RES INST
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Problems solved by technology

[0004] The purpose of the present invention is to provide a combined forging and rolling production process for large cylindrical forgings to solve the problems of the existing free forging process for producing large cylindrical forgings with complicated procedures, many firing times, low production efficiency and high energy consumption

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  • Large cylindrical forge piece forging and rolling composite production technology

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Embodiment Construction

[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0022] A kind of forging and rolling composite production process of large cylindrical forgings, it comprises the following preparation steps:

[0023] Step 1. Heat the steel ingot according to the design requirements and place it on the free forging equipment for upsetting, elongating and punching. When the forging ratio of the steel ingot is ≥ 4.6, prepare a cylindrical forging blank 1. Measure the surface temperature of the blank 1. When When the surface temperature of the blank 1 is lower than the final forging temperature + 100°C, the blank 1 is heated until the surface temperature of the blank 1 is greater than or equal to the final forging temperature + 100°C; the blank 1 that meets the temperature requirements is lifted to the top of the rolling equipment, The cylinder wall of the blank 1 is loaded between the upper roll 2 and the lower roll 4, and th...

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Abstract

The invention discloses a large cylindrical forge piece forging and rolling composite production technology. The technology comprises the steps that a steel ingot is sufficiently deformed on free forging equipment to complete blank forming, a large cylindrical forge piece blank is installed between an upper roller and a lower roller of cylindrical forge piece rolling equipment, and deformed undercontinuous rolling of the upper roller and the lower roller, the wall thickness is reduced, and the diameter is enlarged; meanwhile, a guide roller on the rolling equipment is automatically rotated under the effect of friction force and moves outwards along with increasing of the diameter of a cylindrical forge piece, the circular degree and rolling stability of the cylindrical forge piece are controlled by applying certain guide force to the cylindrical forge piece, and finally rolling of the large cylindrical forge piece is completed. The technology is the novel circular part rotary rollingforming technology, has the advantages that the machining allowance is small, the material utilization rate is high, the product size precision is high, the production efficiency is high, energy is saved, and the comprehensive cost is low compared with a traditional free forming technology, and therefore has the quite good practical popularization value.

Description

technical field [0001] The invention relates to the technical field of pressure vessel manufacturing, in particular to a composite production process of forging and rolling large cylindrical forgings. Background technique [0002] Cylindrical forgings refer to axisymmetric hollow forgings whose axial length is greater than its outer diameter. Large cylindrical forgings usually refer to cylindrical forgings with a forging weight greater than 5 tons, including large nuclear power cylindrical forgings, large hydrogenation reactor cylinders Shaped forgings and cylindrical forgings for coal liquefaction reactors belong to the key components required in the fields of nuclear power equipment, petrochemical equipment and coal liquefaction equipment, respectively. At present, the production and manufacture of large-scale cylindrical forgings in my country is basically produced by free forging. Process size. [0003] The size of large cylindrical forgings produced by the free forging...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21K21/06B21H1/06
CPCB21H1/06B21K21/06
Inventor 祁庆花王亚安李慧李七平曹琨张英波袁玲道韩文科张潇潇李岚峰杨震
Owner LANZHOU LS ENERGY EQUIP ENG RES INST
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