Semi-sank large precise ring rolling machine

Abstract

The apparatus for machining large metal ring includes one gate-shaped frame comprising one fixed frame and one movable frame for holding the ring workpiece to be machined, one movable frame driving travel mechanism, one parallel roll pair comprising one fixed roll on the gate-shaped frame and one travel roll on the composite beam, one push mechanism set between the gate-shaped frame and the composite beam to drive the composite beam with movable roll to roll the workpiece, and rotating mechanisms separately on the fixed roll and the movable to rotate them. The present invention has high work efficiency, high product precision and high mechanical performance.

Description

technical field [0001] The invention relates to a device for processing large metal rings, which belongs to the technical field of metal processing machinery. Background technique [0002] With the development of my country's major equipment manufacturing industry, the demand for large-scale high-tube rings is increasing, such as oil-film bearing sleeves for large-scale rolling mills, high-pressure steam drums for large-scale thermal power boilers, coal liquefaction vessels, and safety covers for nuclear power reactors. As well as the heavy chemical industry, there is a large demand for large-scale high-tube rings. At present, there are relatively suitable equipment and very Mature technology. [0003] However, for the forging process of large-scale high-tube ring forgings with a height of H≥1000mm and a diameter of >3000MM, the large-scale heavy machinery factories in my country still use the free forging process with a history of more than 40 years to solve it, that is, ...

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Problems solved by technology

[0003] However, for the forging process of large-scale high-tube ring forgings with a height of H≥1000mm and a diameter of >3000MM, the large-scale heavy machinery factories in my country still use the free forging process with a history of more than 40 years to solve it, that is, use it on large hydraulic presses or hydraulic presses. The manipulator or the crane hoisting turning machine clamps the special mandrel and the auxiliary device to operate on the horse bar. This process has low work efficiency and large margin. The consumption is large, the fire consumption reaches 8-10% of the weight of the forging, and the cracks caused by forging are easy to occur inside the forging, and the metallographic structure of the forging is repeatedly heated, the grain size is large, and the mechanical properties are reduced. So far, it has not been specially used for the production of large-scale high It is inconsistent with the economical development policy

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