Waveform furnace pipe spinning forming process

Abstract

The invention relates to a waveform furnace pipe spinning forming process. The waveform furnace pipe spinning forming process comprises the steps of (1) adjusting the rotating speed of a cylinder body to be 3.5-5pm and enabling a furnace pipe to be partially and evenly heated by the temperature of 750-850 DEG C at the heating wave band position, (2) moving a jacking pressing wheel to the heating wave band position to enable the jacking pressing wheel to be in contact with the surface of a cylinder joint to enable the jacking pressing wheel to be slowly fed, enabling the feeding quantity to be 1-2mm each time, continuously conducting feeding after the cylinder body rotates for one revolution, spinning while conducting heating until the waveform achieves the preset depth shape, meanwhile, tightening an adjusting screw nut on a furnace pipe tailstock clamp pressing disc shaft while spinning, enabling a furnace pipe heater to be a medium-frequency induction heater, enabling the using power of a medium-frequency power source to be 1000Hz-2500Hz, and enabling the heating time based on the wall thickness to be 1.5*min / mm. According to the waveform furnace pipe spinning forming process, when spinning is carried out, spinning crowded injury marks on the surface cannot be easily caused by the high temperature, and influences on the reduction quantity, the waveform height and the waveform pitch of the wall thickness are fewer.

Description

technical field [0001] The invention relates to a forming and processing method of a furnace, in particular to a forming and processing method of a corrugated furnace. Background technique [0002] In oil-fired boiler products, the corrugated furnace is the main pressure-bearing part of the oil-fired boiler, but manufacturing the corrugated furnace is the biggest problem in the production of oil-fired boilers. Controlling the molding quality of the corrugated furnace and meeting JB / T1619-2002 "Technical Conditions for Shell Boiler Body Manufacturing" is an important link to ensure the quality and safety of oil-fired boilers. [0003] At present, domestic boiler manufacturers adopt the following manufacturing processes for corrugated furnaces according to the equipment and technical level of each factory: [0004] 1. Cold forming process on the press, the disadvantages of this forming process: [0005] ① The required press equipment is huge, and the mold tooling is complica...

AI Technical Summary

Problems solved by technology

[0005]① The required press equipment is huge and the mold tooling is complicated;

[0006]② The labor intensity of workers is high and the production efficiency is low;

[0009]① The investment in equipment is large, the waveform is different, and the corresponding three-star roller is required, which will cost more;

[0010]② The barrel is repeatedly rolled and rolled, which makes it difficult to guarantee the quality of the welded part of the barrel. After forming, the stress of the barrel is large, and it must be annealed as a whole;

[0011]③ This kind of three-star roll rolling, currently it is not possible to roll a cylinder with a thickness of δ=20mm

[0014]② Conversion from coal to gas combustion requires high quality coal, and the conversion from coal to gas consumes a lot

Heating spinning fume pollutes the surrounding environment greatly, and the operating environment of workers is poor;

[0015]③ The gas is heated and injected to the surface of the cylinder for combustion, which will easily cause oxidation and shelling on the surface of the cylinder, and in severe cases, carburization will occur on the cylinder

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