Manufacturing process of large-size thin-walled cylinder body

Abstract

The invention relates to a manufacturing process of a large-size thin-walled cylinder body, comprising the following steps of: inputting the front end of a steel plate with the thickness meeting requirements into a three-roller plate bending machine, and bending the steel plate into an arc shape through a compression roller by the three-roller plate bending machine; arranging a bracket at one side of the three-roller plate bending machine, arranging a carrier roller on the bracket, wherein the carrier roller is arranged parallel to the compression roller of the three-roller plate bending machine, and the height of the carrier roller corresponds to the diameter of an opening of the large-size thin-walled cylinder body; enabling the steel plate to ascend from the outlet end of the three-roller plate bending machine under the thrust action of the three-roller plate bending machine during bending and keep a same arc all the time in the bending process, and enabling the front end of the steel plate to be naturally overlapped with the carrier roller after reaching a highest point and then continuously downwards bent back to the inlet end of the three-roller plate bending machine; connecting divided edges of the front end and the rear end of the large-size thin-walled cylinder body which is completely bent in a parallel and level way, and also fixing through spot welding; and welding to form a circular cylinder body. The invention can effectively control the deformation of the cylinder body in the manufacturing process by utilizing a principle of the action of one support on a circumference, is more convenient and faster to assemble, effectively reduces the manufacturing cost and has very good popularization value.

Description

technical field [0001] The invention relates to an on-site (field) manufacturing method of a large thin-walled cylindrical body, in particular to a rolling process of a large thin-walled cylindrical body, and belongs to the technical field of mechanical manufacturing. Background technique [0002] In steelmaking, chemical industry, power generation and other industries, large cylinder (tank) equipment is required, such as evaporative coolers, gas coolers, and dust removal pipes used in steelmaking converters. Due to their large size and weight, these equipment cannot be transported. Therefore, it is usually made on site (in the field) during production, and then hoisted, spliced, installed and formed. [0003] At present, when making a large-scale cylinder on site (in the field), the steel plate is rolled into an arc shape by a plate rolling machine, and the top of the steel plate is hoisted by a crane to prevent the cylinder from deforming under the action of gravity, so th...

AI Technical Summary

Problems solved by technology

This production method has the following defects: 1. When rolling, due to the natural fall of the steel plate gravity, it must be assisted by a crane, otherwise it cannot be rolled round, but the special use of a crane to cooperate with the rolling will affect the assembly of the cylinder, and Affecting the construction period, renting too many cranes will inevitably lead to high costs; 2. When removing the rolled cylinder from the plate rolling machine, multiple support pipes must be welded, otherwise it is easy to cause failure due to hoisting due to the thin cylinder. If the deformation of the cylinder is too large, it will be difficult to repair, which will increase the difficulty of secondary assembly, which will not only affect the normal production period of the equipment, but also increase unnecessary manufacturing costs

Images