Forming technique for sheet metal stamping cold forging and fine blanking composite boss part

Abstract

The invention relates to a forming process of a lug boss part. A shaping technique of a panel punching forge cold and fine punching compound lug boss part is characterized in including the following steps: 1) the lug boss is pre-shaped on the punching forge cold of the panel; a metal panel (1) is arranged on a cavity die (2) and pressed by using a holding pad (5); a punching force plug (6) drives a squeezing force plug (3) to move downwards under the action of punching pressure to lead the material of the metal panel (1) below the punching force plug (6) to flow into a die space; when the punching force plug (6) moves downwards to reach the lug boss shaping height of the lug boss part, the squeezing force plug is restrained to move; the punching force plug continuously moves downwards; the materials between the punching force plug (6) and the squeezing force plug (3) are squeezed so as to be filled with the die space and pre-shape the lug boss on the metal panel; 2) recoiling recess; 3) finely the profile of the lug boss part is punched to lead the lug boss part to be separated from the metal panel to obtain the lug boss part. The process can obtain the lug boss part with the high precision, the good quality and the low cost.

Description

technical field [0001] The invention relates to a forming process of a boss part, in particular to a process of forming a boss by stamping and cold forging on a plate and continuously compounding the boss part with a fine-blanking contour. Background technique [0002] Fine blanking is a fine blanking method developed on the basis of general punching. It uses sheet metal as the main raw material, and obtains high-quality fine blanking parts with high dimensional accuracy, good verticality, smooth punching surface and good interchangeability in one stamping stroke, which has the advantages of high quality, high efficiency and low consumption. At present, fine blanking is mainly used to produce flat parts. The production of three-dimensional multifunctional products by fine blanking has become the future development trend of fine blanking technology. A typical type of parts is to form bosses on the sheet metal to meet high connection or Matched to the functional requirements,...

AI Technical Summary

Problems solved by technology

There are two types of traditional processing methods for boss parts. One is to use punching and flanging for shaping, bottom cutting and then shaping after deep drawing, or punching and flanging and then shaping after deep drawing. However, the process route is long, the mold structure is complicated, and the dimensional accuracy is difficult. Guaranteed, the height and thickness of the forming boss is limited, prone to crack failure

The other type is to punch holes in the sheet first, and then weld the thick-walled pipe to form a boss. The disadvantage of this process is that the parts are not beautiful, and the boss cannot meet the functional requirements.

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