Stamping and spinning integrated forming device for thin-wall cylinder part with concave bottom and forming method thereof

Abstract

The invention discloses a stamping and spinning integrated forming device for a thin-wall cylinder part with the concave bottom and a forming method thereof. The device structurally comprises an uppermold plate and a lower mold plate, a movable mold plate is arranged above the upper mold plate, a male mold is rotatably arranged in the lower mold plate, an annular protrusion is arranged on the topface of the male mold, the top of the male mold is sleeved with a side pressing ring, a spring is arranged between the side pressing ring and the lower mold plate, a middle female mold is rotatably arranged in the upper mold plate, an annular groove corresponding to the annular protrusion is formed in the bottom face of the middle female mold, the bottom of the middle female mold is sleeved witha movable female mold, the top of the middle female mold is rotatably arranged on the movable mold plate, a rotating wheel frame arranged on a numerical control tool reset is further included, and a rotating wheel is arranged on the rotating wheel frame. The forming process of the thin-wall cylinder part with the concave bottom is simplified, the mold structure is simplified, the forming precisionis improved, and the forming period is shortened.

Description

Technical field: [0001] The invention relates to the technical field of forming a thin-walled cylindrical part with a concave bottom, and mainly relates to a punching-rotation integrated forming device and a forming method for a thin-walled cylindrical part with a concave bottom. Background technique: [0002] Thin-walled cylinders with concave bottoms are widely used in the field of tanks (tubes) for liquid packaging containers. The wall thickness of the cylinder is thin, the ratio of diameter to thickness and height to diameter are large, and the forming accuracy is high, especially for large-capacity liquid containers. In order to stably stand upright and support the weight of the liquid, the bottom needs to be designed as a concave shape with rounded transitions. Based on mechanical calculations and material saving considerations, the waist is designed to be thinner, and the shoulders need to be riveted (or rolled) with the conical cover. Designed to be thicker in order ...

AI Technical Summary

Problems solved by technology

The disadvantages of traditional manufacturing methods are: (1) For thin-walled liquid containers with high internal pressure, the annular weld is a rupture hazard zone; (2) For large-capacity liquid food (beer, etc.) packaging containers, welding heat The affected area is a dangerous area for later corrosion of stainless steel materials; (3) For strong solvents such as alcohol, due to the introduction of heavy metals by flux, long-term storage may easily cause food safety hazards; (4) For cylinders with strict sealing requirements, thin-walled welding It is difficult to guarantee the sealing of the seam, which requires high welding skills for workers

[0004] Spinning forming is a point-by-point plastic forming process with less cutting and no cutting. Its forming accuracy and mechanical properties are high. However, if only a single spinning process is used, the spinning forming process of the cylindrical part with concave bottom is relatively complicated. , the bottom and wall of the tube need to be multi-pass ordinary spinning and thinning spinning, and the production cycle is relatively long

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