| 摘要 |
tube welding equipment, namely, vacuum diffusion welding of lapped tubes from different materials. SUBSTANCE: burnishing tool has rods 3 supporting burnishing rollers 4. Opposite ends of rods are mounted in housing 2 with possibility of rotation. Burnishing rollers 4 are changeable ones. Heat protective screens 6 are arranged in housing 2 at side of rods 3. Such structure of tool prevents heating of ball bearings 5 at welding process and allows to lower minimally allowable diameter of welded tubes from 120 mm to 65 mm. EFFECT: enhanced strength of welded joint, reduced minimum diameter of welded tubes. 3 cl, 2 dwg, 1 ex |
