Process for forming T-shaped welded nut by multistage cold former

Abstract

The invention discloses a process for forming a T-shaped welded nut by a multistage cold former, comprising the following steps of: cutting; shaping; preforming a rim and a flange; preforming the rim and a weld pin; completely forming the rim and the weld pin; punching; trimming, and the like. In the invention, coil wire rods are fed by an automatic feeding device in an accurate stepping way, then made in to finished products in one step through continuous manufacturing procedures by using a mould, and the products are formed fast and accurately in the continuous forging process; and therefore, the invention realizes the automation and the standardization of production and has faster production speed and high utility rate of wire rods (blanks), not only enhances the production efficiency and the utility ratio of materials, but also reduces the labor intensity of workers, and further improves the strength, the rigidity, the accuracy and the appearance quality of the product and greatly reduces the cost; in addition, the invention has good operation safety and social environmental protection, meets the manufacturing requirements for decreasing waste materials and enhances the product quality and the economic efficiency.

Description

technical field [0001] The invention belongs to the field of metal forging and pressing processing, and in particular relates to a process for forming a T-shaped welding nut by a multi-station cold heading machine with a disk element wire. Background technique [0002] Products such as T-shaped welding nuts are hardware parts and are widely used in aviation, automobiles, tractors and other industries. Domestic automobile factories have gradually increased the intensity of localized parts in order to reduce procurement costs. The demand is huge and the requirements are large. Mass production can be satisfied. [0003] Traditional techniques (such as figure 1 Shown): Using a punching machine to carry out multi-step drawing, punching, shaping, and pressing of welding feet ( Figure 1A The W), blanking and other stamping processes are processed and formed, such as Figure 1A For the T-shaped weld nut shown, this process has the following defects: [0004] (1) It is very easy...

AI Technical Summary

Problems solved by technology

[0004] (1) It is very easy to desolder during welding: in order to suppress the welding leg W (such as Figure 1A shown), the flange of the T-shaped weld nut needs to be pressed out of the concave ring V (such as Figure 1A As shown), the concave ring V causes the solder leg W to be crushed before the soldering temperature is reached, and desoldering is very easy to occur;

[0005] (2) The utilization rate of materials is extremely low: by figure 1 It can explain the material utilization of this traditional craft (except 4

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