| 摘要 |
1,186,201. Altering physical structure; making metal articles; twisting; rolling. ROTARY PROFILE ANSTALT. 21 April, 1967 [5 May, 1966], No. 18373/67. Headings B3A, B3E, B3M and B3V. The fibrous inclusions in a material, e.g. steel rod or tube, are fragmented by applying torque to an isolated zone of the heated metal. In one embodiment, Fig. 5, a heated tube 20 is chucked and clamps 28 applied along its length. The chuck 26 is held stationary whilst chuck 24 is rotated and the clamps 28 progressively released so that zones of the tube are progressively isolated and twisted. The clamps 28 may be replaced by a heating coil (32), (Fig. 6, not shown), and a water spray (40) which are traversed along the heated tube. The tube may be simultaneously rolled by skewed rollers (48), (Fig. 7, not shown), traversing the tube, twisting being confined to the zone between the rollers and water spray (50). In another embodiment, Fig. 8, two grippers 62 in each zone 56, 60, 58 co-operate to continuously advance a preheated bar 54, the middle gripper holder 66 being rotated to twist the bar in the middle zone 60. The bar may alternatively be rolled through three pairs of rollers (72, 74, 76), (Fig. 9, not shown), the middle pair (74) of which is caused to orbit; the rollers may be skewed in which case the outer pairs are caused to orbit (Fig. 10, not shown). The bar may be twisted in opposite directions as it is passed between two pairs of skewed rollers (88, 90), (Fig. 11, not shown). Wire (100), (Fig. 12, not shown), may be continuously wound around three side-by-side capstans, the middle of which is caused to orbit. In a further embodiment, Fig. 13, a closed end cylinder 106, e.g. gas pressure tank, is formed by drawing the material between skewed rollers 122 and a sleeve 112 surrounding a movable plunger 110. To effect twisting, one end of the cylinder 106 is clamped at 124 whilst the opposite end is rotated by a headpiece 114 surrounding the sleeve 112. Alternatively, the rollers 122, plunger 110 and clamp 124 may rotate whilst the headpiece 114 is stationary. |
