Título

PRODUCTION OF MECHANICAL GRADE PROFILES BY SLIT ROLLING

PRODUCTION OF MECHANICAL GRADE PROFILES BY SLIT ROLLING

Autoria

Bernard, Blanksby; Karlen, Thomas; Mumford, Paul

DOI

10.5151/2594-5297-0085

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Resumo

The challenge with slit rolling is the torn edge, made when the two halves of a figure 8 are forced apart. In rebar rolling, a slight witness remains in the product, which is acceptable. But to roll a plain round and a good quality sharp edged square, an improved rolling technology has to be applied. Slitting takes place in the fifth from final stand in the same way as rolling rebar. For plain round, an oval / round / oval / round pass progression is satisfactory to remove the torn edge giving an acceptable quality round. An oval / square / diamond / square pass progression gives the quality square and the sharp edges are produced by a special final pass. The material rolled was mechanical grade A-36 and customer was very pleased with the final quality helping him to develop new markets. Since now 99.9% of slit rolled product is rebar, so this project developed slitting technology a step further giving to the clients and to slitting technology a new market opportunity. Ashlow Guides & Metalform Konsult are proud to have contributed to it. VAI POMINI Ltd. (Ashlow Guides) & Metalform Konsult have successfully developed guides and roll pass design for rolling 3/8” sharp edged squares and 3/8” plain rounds by 2-slit rolling.

 

The challenge with slit rolling is the torn edge, made when the two halves of a figure 8 are forced apart. In rebar rolling, a slight witness remains in the product, which is acceptable. But to roll a plain round and a good quality sharp edged square, an improved rolling technology has to be applied. Slitting takes place in the fifth from final stand in the same way as rolling rebar. For plain round, an oval / round / oval / round pass progression is satisfactory to remove the torn edge giving an acceptable quality round. An oval / square / diamond / square pass progression gives the quality square and the sharp edges are produced by a special final pass. The material rolled was mechanical grade A-36 and customer was very pleased with the final quality helping him to develop new markets. Since now 99.9% of slit rolled product is rebar, so this project developed slitting technology a step further giving to the clients and to slitting technology a new market opportunity. Ashlow Guides & Metalform Konsult are proud to have contributed to it. VAI POMINI Ltd. (Ashlow Guides) & Metalform Konsult have successfully developed guides and roll pass design for rolling 3/8” sharp edged squares and 3/8” plain rounds by 2-slit rolling.

Palavras-chave

slitting, profiles, mechanical grade

slitting, profiles, mechanical grade