Thermal deformation technique of flange with abnormal section

Abstract

The invention discloses a thermal deformation technique of flange with abnormal section comprising the following steps: heating and upsetting a billet; punching a through hole at centre of one face of the upset billet by a small diameter solid punch; putting a positioning mould on the through hole and pressing the positioning mould by a press; taking out the positioning mould, punching the through hole into a stepped hole by a large diameter solid punch; heating the billet with stepped hole and putting on a ring rolling mill for ring rolling processing. The ring rolling mill is provided with a king roller and a core roller provided with a core mould section. The ring rolling mill rolls the billet into a flange with abnormal section by the king roller, the core roller and the core mould section on the core roller. The technique can process a circular component into a flange with abnormal section by simple technical steps in one single step, not only reducing workload of machine processing, but also saving large amount of raw materials.

Description

technical field [0001] The invention relates to a processing technology for connecting flange parts of a wind power tower, in particular to a thermal deformation process of flanges with special-shaped cross-sections. Background technique [0002] The wind power tower mainly plays a supporting role in the wind power generation unit, and is also used to absorb the vibration of the unit. The general wind power tower is composed of four sections, and the wind power flange is welded at both ends of the tower to connect the upper and lower parts. At present, the production process of the wind power tower flange is to use quick-cast billets or steel ingots as raw materials, and then heat, upsetting, punching, and then go to the ring rolling machine to grind the billets into flange fur rings with rectangular cross-sections. However, the cross-sectional shape of the wind power flange during use is generally L-shaped or T-shaped, so machining is required to process the flange fur ring...

AI Technical Summary

Problems solved by technology

However, the cross-sectional shape of the wind power flange during use is generally L-shaped or T-shaped, so machining is required to process the flange fur ring with a rectangular cross-section into a flange ring with an L-shaped or T-shaped cross-section. This processing technology is time-consuming and laborious, consumes a lot of energy, and wastes a lot of materials. At the same time, it will also destroy the fiber structure inside the metal and reduce the strength of the ring.

In addition, in the existing punching process, generally only small holes can be punched out on the blank. If a large hole is punched directly, the upper end surface of the blank will collapse, and only small holes are punched out. Ring parts, and the roll core with the mandrel cannot be installed in place at one time during the rolling process

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