JPS5633101A - Manufacture of metallic shape by rolling work - Google Patents

Abstract

PURPOSE:To enlarge the surface area of the metallic material, by rolling the appexes of plural straight grooves formed in the metallic material with the roll possessing pleats at its surface, and by transferring the deformation relief of the rolled part to the unrolled part. CONSTITUTION:The metallic shape with the surface showing an excellent heat transmission characteristic is manufactured by only the rolling work. For example, the rolling work is carried out to prepare the metallic material so as to possess plural straight grooves 5 in the rolling direction. Next, the grooved roll is prepared; hereupon, the grooves are arranged at a pitch equal to he center distance of grooves 5 formed in the metallic material, and the grooves are formed so as to possess the sectional area larger than the sectional area of the grooves 5 formed in the metallic material, and besides, the mountains of the straight grooves 5 are cut off perpendicularly to the arris to the bottom of the groove at a suitable pitch and at a suitable angle; hereby the rolling roll possessing the dice-shape protuberances 2' is obtained. Then, the rolling work is applied to the metallic material so as to push the roll's dice-type protuberances 2' into the grooves 5 of the metallic material. The metallic material's undeformed part 1 faces the roll groove 1', and the deformed part 3 faces the roll's side plane 3'; hereby, the part 4 permittng the transference of the deformation relief is formed.