A dieless spinning method for non-axisymmetric thin-walled shell parts

Abstract

The invention relates to a dieless spinning forming method of non-axisymmetric thinned-wall housing parts. The method comprises the following steps: clamping a circular slab between a spindle and a tail top of a numerically-controlled spinning machine and coinciding axle centers of the circular slab, the spindle and the tail top; adjusting the height of the rotary wheel such that axle centers of the rotary wheel, the circular slab, the spindle and the tail top are located on the same horizontal plane, wherein an included angel of 45 degrees is formed between a fixing rack of the rotary wheel and the spindle; crafting a numerically-controlled processing program according to the path trajectory of the rotary wheel, wherein the path trajectory of the rotary wheel is located within the horizontal plane where axis centers of the rotary wheel, the circular slab, the spindle and the tail top are located; executing the program to perform dieless spinning forming operation till the non-axisymmetric thinned-wall housing parts are obtained. The dieless spinning forming method of non-axisymmetric thinned-wall housing parts abandons the use of a profiling core mold. Through an existing spinningdevice, spinning forming of non-axisymmetric thinned-wall housing parts can be finished. Especially in a product pre-research trial-manufacture phase, products are in limited quantities. Additionally, parameters are changed frequently. At this time, part processing cost is greatly lowered. The part manufacture period can be effectively shortened. Part machining quality is ensured while part machining efficiency is increased.

Description

technical field [0001] The invention belongs to the technical field of sheet metal spin forming, in particular to a dieless spin forming method for non-axisymmetric thin-walled shell parts. Background technique [0002] In many industrial fields such as aviation, aerospace, and automobile, non-axisymmetric special-shaped components are often used as key components. Due to the characteristics of non-axisymmetric special-shaped components with asymmetric structure and large axial depth, it is difficult to perform integral processing. At present, non-axisymmetric special-shaped components mainly obtain semi-finished parts in a split state by stamping, and then weld the semi-finished parts in a split state into a whole by welding. However, this processing method has high parts processing costs and parts manufacturing cycle Shortcomings of length and low processing quality of parts. [0003] At the same time, in addition to the above-mentioned processing methods, some non-axisym...

AI Technical Summary

Problems solved by technology

At present, non-axisymmetric special-shaped components mainly obtain semi-finished parts in a split state by stamping, and then weld the semi-finished parts in a split state into a whole by welding. However, this processing method has high parts processing costs and parts manufacturing cycle Disadvantages of length and low part processing quality

[0003] At the same time, in addition to the above-mentioned processing methods, some non-axisymmetric special-shaped components will also be processed by spinning forming, but it is necessary to use a copy mandrel, and spin through the copy mandrel, but before spinning, it needs to be continuously processed. Debugging and modifying the mandrel in a timely manner not only leads to high processing costs, but also easily delays the manufacturing cycle

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