Hot pressing process for steel sheet rolling wheel
A hot pressing process and roller technology, which is applied in the field of metal parts pressure processing, can solve the problems of reduced precision and strength of rollers, failure to meet standard requirements, uneven wall thickness of rollers, etc., to reduce welding deformation and stress, and improve product quality. Precision and strength, low cost effect
Inactive Publication Date: 2007-09-05
刁义元
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Problems solved by technology
The existing steel plate roller is made by cutting the steel plate, reeling, welding and then spinning. The disadvantage is that the investment in equipment is large and the technical requirements for workers are high. Especially after spinning, the wall thickness of the roller is not uniform. , easy to wrinkle, often fail to meet the standard requirements, and the service life is also affected
Recently, some manufacturers adopt the compression forming method, that is, the roller is divided into two halves first, and then welded into a whole after molding, but the welding deformation and stress caused by the two welding seams reduce the accuracy and strength of the roller.
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[0016] Referring to the accompanying drawings, the blanked steel plate is rolled into a cylindrical shape, welded into a steel pipe, and becomes a roller blank 1 (Fig. 1). First, locally heat the A end of the billet to 860°C in a salt bath furnace, and heat press it into a trumpet shape through the flare die 2 on the press (Figure 2); then heat the B end of the billet locally to 860°C in a salt bath furnace. ℃, on the press through the expansion die 2 hot-pressed into a trumpet shape (Figure 3), and then heated to 860 °C on the B end, on the press through the shrinking die 4 hot-pressed into a drum shape (Figure 4), and then in Within 3 minutes, it is processed and shaped by forming die 5 (Fig. 5).
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This invention concerns steel plate roller hot pressing technique. Roll the steel plate into cylinder shape, weld into steel pipe, or use seamless steel pipe; heat locally to one end (A) to 850~900Deg, hot press to horn shape by enlarging mould on pressing machine; heat locally to one end (B) to 850~900Deg, hot press to drum shape stepped by enlarging mould, reducing mould and forming mould, wherein, take the forming process within three minutes after enlarging. The invention is used to the process for steel plate roller assembled on ship with simple operation and low cost, ensures wall thickness even without cockled edge, decreases welding deformation and disadvantage effect of stress, and prolongs service life.
Description
technical field [0001] The invention relates to a metal piece pressure processing method, in particular to a hot pressing forming process of a steel plate roller. Background technique [0002] The steel plate roller is a special part for mooring when the ship is docked. It is located at the bow, stern and side of the ship. Its structural shape and performance indicators should meet the relevant standards. The existing steel plate roller is made by cutting the steel plate, reeling, welding and then spinning. The disadvantage is that the investment in equipment is large and the technical requirements for workers are high. Especially after spinning, the wall thickness of the roller is not uniform. , easy to wrinkle, often fail to meet the standard requirements, and the service life is also affected. Recently, some manufacturers adopt the compression forming method, that is, the roller is divided into two halves first, and then welded into a whole after molding, but the welding...
Claims
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IPC IPC(8): B21D53/00B21D41/00
Inventor 刁义元潘俊华
Owner 刁义元