Thermal-bulging forming method of high-temperature alloy rectangular section ring unit

Abstract

The invention discloses a thermal-bulging forming method of a high-temperature alloy rectangular section ring unit. The method includes the steps that 1, a preheated die sleeve is fixed to a work table of a bulging machine, a heated high-temperature alloy rectangular section ring unit is arranged on the periphery of a preheated bulging block in the bulging machine in a sleeved mode, and the heated high-temperature alloy rectangular section ring unit is located in an annular space formed by enclosure of the outer circumference face of the bulging block and the inner ring face of the die sleeve; 2, the bulging machine is started, the ring unit can be extruded by the bulging block from the inner circumference surface of the ring unit in the radial direction and extruded into the inner ring face of the die sleeve after the ring unit deforms by 11%-13%, a closed cavity formed by enclosure of the outer circumference face of the bulging block and the inner ring face of the die sleeve is full of the ring unit, and the ring unit becomes the bulged rectangular section ring unit after pressure maintaining. According to the thermal-bulging forming method, bulging forming is achieved by one-shot large deformation, operation is simplified, and the bulged rectangular section ring unit which is high in size accuracy, good in product quality and high in productivity can be obtained. The bulged rectangular section ring unit is mainly applied to revolved body components and parts like cylindrical shells in the fields like aerospace.

Description

technical field [0001] The invention relates to a bulging method for a ring, in particular to a thermal expansion forming method for a high-temperature alloy rectangular section ring. Background technique [0002] In the field of ring forming technology, with the development of aviation, aerospace, shipbuilding, nuclear energy, gas turbines, wind power and other industries, the requirements for high reliability, long life and low cost of ring parts require the forming dimensional accuracy, structure and quality of ring parts. Performance also puts forward higher requirements, and the forming of ring parts is developing in the direction of high quality, precision, high efficiency, environmental protection and low cost. [0003] After the high-temperature alloy rectangular cross-section ring (referring to the ring with a rectangular cross-section in the longitudinal section) is rolled by a ring rolling mill, due to the influence of the rolling process and equipment limitations...

AI Technical Summary

Problems solved by technology

The method adopts the open bulging method to bulge and form the high-temperature alloy rectangular cross-section ring, which has the following problems: First, only the inner diameter of the ring can reach 1‰ to 2‰ of the inner diameter. For the ring The dimensional accuracy of the outer diameter and height of the ring part cannot reach this dimensional accuracy, because the dimensional accuracy of the outer diameter and height of the annular part is not controlled during the bulging process, and its size cannot be improved by this bulging method. Accuracy, that is, the height and outer diameter of the ring are basically maintained at the level after ring rolling; second, the method uses three consecutive small deformations and two rotations to bulge the rectangular cross-section ring, each bulging It can only be realized by adjusting and controlling a large number of process parameters. The process is relatively cumbersome, the productivity is low, the energy consumption is large, the production preparation time and production cycle are long, and the requirements for equipment are also high. It is not conducive to controlling the product in the actual production process. Quality and organization mass production, it is difficult to obtain high-quality, precise, efficient, environmentally friendly and low-cost ring parts

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