Continuous Roll Forming Method of Stainless Steel Corrugated Plate for Heat Exchanger

Abstract

The invention discloses a process and a device for preparing a stainless steel corrugated plate of a heat exchanger through continuous rolling of a special hole roll. The technological process comprises the following steps: uncoiling by using an uncoiling machine; guiding by using a guide clamp feeding roll; automatically sensing temperature and heating by a heating furnace; straightening the plate by a straightening unit; guiding by using the guide clamp feeding roll; performing continuous roll forming by using the special hole roll; cutting to length by using a V-shaped shear blade fly shear; collecting dropped materials, wherein the plate is subjected to continuous roll forming during engagement of a forming roll. Based on a continuum forming principle, the influence between adjacent ripples is considered, and a rebound angle model in a continuum rolling process is established. During design of the forming roll, the continuum rebound angle model and an optimal design principle are combined, and a roll tooth parameter design model suitable for preparing the corrugated plates of different design parameters is established. According to the continuous roll forming device for preparing the stainless steel plate corrugated structure, a smaller plate and strip strain rate can be kept, the crack defect caused by a stamping process can be avoided, the life of a machining mold can be prolonged and the machining efficiency can be improved.

Description

technical field [0001] The invention belongs to the technical field of preparation of stainless steel plates for heat exchangers, and in particular relates to a new continuous roll forming method for stainless steel corrugated plates with special grooves. Background technique [0002] Plate heat exchanger is an efficient and compact heat exchange equipment. The quality of the heat exchanger plates directly affects the heat dissipation performance and working conditions of the plate heat exchanger. The commonly used materials for heat exchanger plates are mostly stainless steel, and the corrugated areas are mostly V-shaped structures. At present, the main processing technology for the preparation of stainless steel corrugated plates for heat exchangers is one-time stamping with a mold and a press, and the single-piece stamping preparation method of manually placing parts has certain risks. During the stamping process, due to the fast deformation of the sheet metal and the ex...

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Problems solved by technology

At present, the main processing technology for the production of stainless steel corrugated plates for heat exchangers is one-time stamping with a mold and a press, and the single-piece stamping preparation method of manual placement has certain risks.

During the stamping process, due to the rapid deformation of the sheet metal and the extremely high strain rate, the true stress of the sheet metal increases with the increase of the strain rate. However, the fracture resistance of the material only depends on the bonding force between atoms, and does not change during the deformation process. Large, with the increase of the strain rate, the metal will reach the fracture stage prematurely, which will reduce the plasticity of the material, causing cracks to easily appear on the edge of the corrugated belt, and reducing the yield of the heat exchanger plate; at the same time, due to the excessive strain rate Large, also aggravated the wear of the mold

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