The screw forming machine is a high-performance forging device that can cut coils and process plasticity, producing hundreds of bolts per minute. Depending on the structure of the forging die, it can produce various components and screw stocks. This article introduces the essential equipment in the bolt manufacturing process, namely the structure and characteristics of the screw forming machine, and discusses the latest functions and development trends of the screw forming machine. In recent years, there are two technologies in the shaping process that need special attention. One is the technology for changing preparation processes and improving utilization rates. The second is high-precision forming technology.

1 Volt Stock Production

The bolt blanks are mainly made using the top or screw forming machine, while the nut blanks are mainly made using the nut forming machine. Simple-shaped bolt stocks are processed through two steps of upsetting, while hex bolts and hex nuts are processed through 3 to 4 steps of upsetting and forging. The production of nut blanks was primarily done through cutting before the 1950s, but now it can be processed into 4 to 5 steps of upsetting.

2 Screw Forming Machine

The forming machine is mainly a horizontal press driven by a crank mechanism. This forming machine cuts the raw materials, namely coils or rods, to the specified length, and then shapes the stock between fixed forging (female die) and moving forging (male die). It is mainly used for the cold and hot precision forging of bolts, rivets, and components.

3 Structure of the Screw Forming Machine

The forming machine consists of a drive device, feeding device, cutting device, forging device, pushing device, processing device, and so on.

The drive device is mainly powered by the main generator, delivering power to each drive mechanism. It operates through a pneumatic clutch, timing gears, and cams.

The feeding device consists of a straightener, conveyor roller, and feeding drive device. The straightener is used to straighten bent coils. The conveyor roller is used to place the wire between the rollers. The feeding driver is used to adjust the transmission stroke of the wire and ensures that the transmission length of the wire meets the specified requirements through the transmission driver.

The processing program of the forming machine is as follows. 1) After being calibrated by the straightening roller, the material end face that is transmitted by the feeding roller stops when it contacts the block. Then, it is cut to the specified length by the cutting machine. The cut stock will later be transported to the position of the pusher. 2) The stock is pushed out of the cutting machine using the pusher, and after being listed, it is clamped by the first process conveyor belt robot. 3) The stock is transferred to the first die position through the conveyor device, where it can enter the die for shaping using the first weighing. After shaping, it is pushed out of the die and clamped by the second transfer robot after being listed. 4) Subsequent processes will repeat the work of these three processes, forming the specified shape in the final process.

The above is an overview of the "latest development trends of the screw forming machine". Everyone take a look.