Sectional material bending blank making method for cobalt-based high-temperature alloy flash welding thin-wall ring part

Abstract

The invention discloses a sectional material bending blank making method for a cobalt-based high-temperature alloy flash welding thin-wall ring part. The sectional material bending blank making method comprises the steps of enabling a cobalt-based high-temperature alloy sectional material blanked according to specifications to be divided into an mn section, an no section, an op section, a pq section and a qw section, and enabling the five sections to be fed into a bending machine to be positioned after heating the five sections to 810 DEG C+ / -20 DEG C; first bending the op section, enabling rotating linear speeds of an upper roll and two lower rolls of the bending machine to be 240mm / min, enabling the speeds of the two lower rolls moving upwards to be 6.0mm / min, repeatedly bending for 5 times, and enabling the op arc-shaped section to reach a preset curvature radius; then bending the no section and the pq section, enabling the rotating linear speeds of the upper roll and the two lower rolls to be 1,200mm / min, enabling the speeds of the two lower rolls moving upwards to be 7.6mm / min, repeatedly bending for 5 times, and enabling the no section and the pq arc-shaped section to reach the preset curvature radius. The sectional material undergoes bending deformation to become a D-shaped ring blank, two straight edges of the ring blank are connected with an arc-shaped part through transition arc-shaped sections, folded corners generated at joints of the two straight edges and the arc-shaped part are eliminated, and indentation of the surface of the ring blank is eliminated.

Description

technical field [0001] The invention relates to a profile bending method, in particular to a profile bending blank-making method for a cobalt-based superalloy flash welding thin-walled ring. Background technique [0002] With the increasing demand for rings in industries such as aviation, aerospace, ships, gas turbines, wind energy, nuclear energy, and bearings, rings formed by traditional rolling methods not only waste a lot of materials due to large machining allowances and low material utilization , but also keeps the cost of ring parts high. The ring parts produced by the flash welding process have less machining allowance, high material utilization rate, and greatly reduce the cost, which is conducive to the development of ring forming technology in the direction of precision forming technology. The preparation technology of flash welding ring blank is one of the key technologies for producing flash welding ring parts. [0003] In the prior art, the following methods ...

AI Technical Summary

Problems solved by technology

In the flash welding ring blank prepared by the above method, corners will be formed at the junction of the circular arc part of the ring blank and the straight edge parts at both ends, and indentations will easily occur on the surface of the ring blank; the ring blank is formed into a ring by flash welding After bulging, it is necessary to carry out bulging and rounding treatment. During bulging, stress concentration is likely to occur at the corners and the ring will be swollen and cracked, resulting in the scrapping of the ring. When correcting the circle, it takes a lot of man-hours and energy to trim the corners, and it cannot be completely Elimination, the overall ellipticity of the ring after calibration is large; due to the small machining allowance of the flash welded ring, the large ellipticity of the ring and the indentation on the surface will affect the dimensional accuracy of the ring, resulting in low dimensional accuracy. It is beneficial to obtain flash welding ring parts with less and no allowance processing

Images