Large diameter-thick ratio and vertical distance ratio seal head rotary percussion forming device and rotary percussion method thereof

Abstract

The invention relates to a large diameter-thick ratio and vertical distance ratio seal head rotary percussion forming device and a rotary percussion method thereof. The forming device comprises a machine tool gantry formed by stand columns and a top beam, a base, a cross beam, double rotary wheel carriers, a rotating platform, a cylinder-shaped mould, a ring-shaped pressure plate fixture, and the like, wherein the rotating platform is arranged on the base of a machine tool; the cylinder-shaped mould is arranged on the rotating platform; a workpiece to be processed is closely clamped on the cylinder-shaped mould, so that the workpiece and the mould can synchronously rotate along with the rotating platform; the two rotary wheel carriers are respectively arranged at the left side and right side of the cross beam, and each rotary wheel carrier is provided with a rotating wheel as a spinning tool; the vertical-direction feed and the horizontal-direction feed of the rotating wheel are realized by a stepping motor and a screw rod. The double-rotating wheel structure is adopted, so that the stress stability of the workpiece can be improved in the spinning forming process, and the influence of vibration to the machining process can be reduced. According to the spinning method, double rotating wheels are respectively used for feeding and extruding the workpiece so as to form the workpiece along the symmetrical arc shapes from the left side and right side of the periphery of the workpiece to the center. The device is simple, the stamping of a drum roller is avoided, is stable in forming process, and is capable of avoiding the phenomenon of instability in the forming process of a large diameter-thick ratio and vertical distance ratio seal head, thus realizing the whole precision shaping of the large diameter-thick ratio and vertical distance ratio seal head.

Description

technical field [0001] The invention relates to a punching and spinning forming device and a punching method for a head with a large diameter-thickness ratio and a large bow-height ratio. Background technique [0002] The most commonly used method for processing heads in the aerospace industry is the melon petal splicing forming method, that is, a large head is divided into several petals, and each part is stamped and formed one by one, and then spliced ​​into a whole seal by argon arc welding or friction stir welding. head. The development of the aerospace industry puts forward more stringent requirements on the structural size, precision and overall performance of components. Realizing the large size, thin wall, light weight and integral forming of such components has become a new trend in the manufacturing process. This kind of melon-type splicing forming processing method has difficulties in ensuring the consistency of the performance of each split during the stamping ...

AI Technical Summary

Problems solved by technology

At present, the maximum diameter that can be spun by the mold spinning method in China is about 2000mm, diameter-thickness ratio does not exceed 300 head curved surface components, when the diameter-thickness ratio of the workpiece increases to 400, wrinkling and instability will occur in the local area during the forming process of the workpiece surface, and the edge will warp or wave wrinkle in severe cases

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