Process for forming external welding leg square nut by multiple work position cold headers from coiled round wire

Abstract

The process of forming square wingnut with coil rod in a multiple work site cold header includes the following steps: 1. cutting material the automatic feeder feeds; 2. forging to flat the shorn surface of the material; 3. setting practical work site number and pre-forging the hole and contour; 4. forming the welded wings; and 5. punching the hole to the required size. The technological process has high production efficiency, high material utilization rate, low labor strength, high product strength, hardness, precision and outer quality, low cost, and other advantages.

Description

technical field [0001] The invention belongs to the field of metal forging and processing, and relates to a process for forming square nuts with outer welding feet (bumps) by a multi-station cold heading machine with a disk element wire. Background technique [0002] Such products as square nuts with outer solder feet (bumps) are hardware parts and are widely used in aviation, automobiles, tractors and other industries. The demand is huge, and mass production is required to meet them. [0003] Traditional process (1): As shown in Figure 1, the sheet material shown in Figure 1A is punched, blanked, and the outer welding leg is formed by using a punching machine, and the outer welding leg (bump point) shown in Figure 1B is processed and formed. ) square nut, this process has the following defects: [0004] (1) The utilization rate of materials is extremely low: Figure 1A can illustrate the utilization of materials in this traditional process; [0005] (2) The thickness of th...

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Problems solved by technology

[0004] (1) The utilization rate of materials is extremely low: Figure 1A can illustrate the utilization of materials in this traditional process;

[0005] (2) The thickness of the machinable nut is limited;

[0006] (3) When the outer solder leg is formed, it can only be done manually and cannot realize automatic production

[0008] (1) Low material utilization rate: manual feeding of bar steel (bar) has a large error in cutting length; cutting blanks according to equal weight requires frequent weighing, wasting man-hours, and low cutting efficiency; bar steel (bar) When cutting the blank, there is surplus material at the head and tail. When cutting in large quantities, a large amount of waste will be generated; if the punching process is placed before the forging process, the punching waste will thicken, and the accumulated waste will be large in mass production;

[0009] (2) Each process cannot be automatically connected, there are many and scattered processes, and it is easy to mix materials between processes; each process needs to be operated by a special person, and material stagnation is easy to occur between processes, and a large amount of handling time is increased, and production efficiency is low. Processing high cost;

[0010] (3) The product has low precision and unstable quality;

[0011] (4) The labor intensity is high and the safety cannot be guaranteed

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