High Strength Three Point Welding Pin

Product introduction

Three-point welding tip pin is a special positioning and connecting element. Its main body is usually a cylindrical pin body, one end is processed into a tapered tip, and the other end is a flat end face. Its core feature is that there are three evenly distributed raised points on the surface of the pin body, which are specially designed for the resistance welding process. When used, the pointed end of the pin is first inserted into the pre-made hole of the component to be fixed (such as a plate) to provide preliminary positioning and guidance. Subsequently, special welding equipment is used to use electric current to generate high heat at the contact surface between the three bumps and the base plate, causing them to locally melt and fuse firmly to achieve a permanent high-strength connection between the pin and the base material. After welding, the flat end is basically flush with the surface of the base material. Designed to enable fast and precise assembly of parts, this structural design creates welded joints that effectively resist shear and torsional forces. This product is widely used in automobile body manufacturing, heavy equipment, cabinet assembly, and various metal frame structure scenarios that require high-precision and high-reliability positioning connections. It is a commonly used industrial part to achieve accurate alignment and rigid fixation between components.

 

Product features

Three-point welding, the connection is strong and reliable: three evenly distributed bumps form a stable triangular welding area, ensuring balanced and high-strength fusion with the base material. This multi-contact design can withstand greater shear force and torsional load than single-point welding, making the connection more reliable.

Fast and precise guidance, simplified assembly: The tapered tip design allows it to be easily and accurately inserted into the holes of mating components to achieve quick centering and pre-positioning. This greatly simplifies the assembly process, especially in automated production lines, which can effectively improve efficiency and reduce adjustment time.

Smooth welding and simple appearance: After welding is completed, the flat end of the pin is basically flush with the surface of the base material without causing obvious bulges. This maintains the smoothness and beauty of the workpiece surface and avoids interference with other components or potential safety hazards.

High strength and high rigidity: Usually made of high-quality steel, it has high mechanical strength after heat treatment. The welding fusion zone with the base material also has strong rigidity, which can ensure long-term stability of positioning accuracy in vibration or stress environments.

Suitable for automated production: Its standardized geometry and resistance welding process characteristics are very suitable for robot grabbing and automated welding equipment for batch and high-speed installation. It is an ideal choice for modern large-scale manufacturing.

 

Product application

Automobile body and chassis manufacturing: In the production lines of automobile body-in-white, frame and chassis components, it is widely used for precise positioning, strengthening connections between different sheet metal parts, and fixing components (such as brackets, brackets). Its high strength can effectively transmit loads and resist vibration.

Heavy machinery and engineering equipment: It is widely used in the assembly of frames, arms and shells of heavy equipment such as construction machinery, agricultural equipment, and trucks. It is used to connect structural parts, install accessories, or serve as a permanent positioning reference point.

Sheet metal chassis cabinets and racks: In the manufacturing of communication cabinets, power control boxes, server racks and other products, it is used to quickly and firmly connect internal reinforcing ribs, guide rails, mounting plates and other components to the shell to ensure the overall rigidity of the structure.

Mold and tooling fixtures: In mold manufacturing and assembly tooling, it can be used as a precise positioning pin to ensure repeated positioning accuracy between mold modules or fixture components. Its welding and fixation method is more stable than traditional spring pins.

 

FAQ

Q: What is the difference between three-point welding tip pins and ordinary positioning pins or direct pins?

A: The core difference lies in the fixation method. Ordinary positioning pins usually rely on interference fit to press into the pin hole, while three-point welding tip pins are fused with the base material through three bumps on its surface using resistance welding to form a non-detachable permanent connection. The connection strength is higher, especially suitable for thin plates or scenes that require single-sided operation.

 

Q: What special equipment is required to install (weld) this type of pin?

A: Yes, a dedicated resistance spot welding machine or automated welding workstation is usually required. The equipment needs to be equipped with electrodes that match the diameter of the pin and the location of the bumps to ensure that the welding pressure and current can act on the three bumps simultaneously and evenly to form a qualified weld nugget.

 

Q: Can this pin be disassembled or reused?

A: No. Because the permanent connection is achieved by welding, once welded, the pin cannot be removed without damage. If it is installed incorrectly or requires repair, it can usually only be destructively removed using mechanical means (such as drilling) and re-welded with a new pin in the new location.

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