Hot pressing process for steel sheet rolling wheel
A hot pressing process and roller technology, applied in the field of metal parts pressure processing, can solve the problems of reduced accuracy and strength of the roller, uneven wall thickness of the roller, and failure to meet the standard requirements, reducing welding deformation and stress, and low cost. , The effect of improving product accuracy and strength
Inactive Publication Date: 2006-01-18
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 attached drawings, after the steel plate is unloaded, it is rolled into a cylindrical shape, welded into a steel pipe, and becomes a roller blank 1 ( figure 1 ). First, heat the A-end of the billet locally to 860°C in a salt bath furnace, and then hot-press it into a trumpet shape through the flaring die 2 on the press (Fig. 2); then locally heat the B-end of the billet to 860°C in the salt bath furnace. ℃, hot-pressed into a trumpet shape through the flaring die 2 on the press (Fig. 3), then heated the B end to 860 ℃, and hot-pressed into a drum shape through the shrinking die 4 on the press (Fig. 3). Figure 4 ), and then processed through the forming die 5 within 3 minutes ( Figure 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 method for pressing metal parts, in particular to a hot pressing forming process for steel plate rollers. Background technique [0002] The steel plate roller is a special part used 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, reeling, welding and then spinning the steel plate. The disadvantage is that the equipment investment is large, and the technical requirements for workers are high, especially after the spinning is formed, the wall thickness of the roller is uneven. , Easy to wrinkle edge, often can not meet the standard requirements, the service life is also affected. Recently, some manufacturers use the molding method to process, that is, the roller is first divided into two halves, after molding, and then butt-welded into a whole, but th...
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IPC IPC(8): B21C37/08B21C37/16
Inventor 刁义元潘俊华
Owner 刁义元