Overhead Projection Weld Stud with 3 Formed Projections

Projection Weld Stud with 3 Formed Projections

This Projection Weld Screw features three precision weld projections on the top of the head, allowing welding directly to (rather than through) the sheet material. The three projections are of equal height and mass and are positioned on the head to allow a robust weld connection while eliminating the need for drilled holes. These industrial fasteners are available from Juxin Fasteners in a variety of materials, dimensions, and thread sizes (inch and metric).

Material: Carbon Steel, Stainless Steel

Carbon steel Grade:5.8,6.8,8.8,10.9

Typical properties of this Projection Weld Screw:

Material: C1010 High-Welding Quality, Low Carbon Steel (plain finish unless otherwise specified)

18-8 Stainless Steel (passivated finish)

Threads(Inch): Unified Standard Class 2A ASME B 1.1-2003

Metric: ASME B 1.13M-2005

Available thread sizes

Inch Metric

#6-32 M3.5 x 0.6

#8-32 M4 x 0.7

#10-24 M5 x 0.8

#10-32 M6 x 1.0

1/4-20 M8 x 1.25

5/16-18 M10 x 1.5

3/8-16

1. The working principle of projection welding:

Projection welding is an evolution of spot welding. Generally speaking, a mountain point is punched out on one of the two plates and then welded. Due to the high current density, it overcomes the defect of nugget offset during spot welding. One or more nuggets form at the joint.

2. Features of the projection welding process: During projection welding, the electrode must drop rapidly as the bump is sub-collapsed, and spatter will occur due to pressure loss, so a projection welding machine with good electrode followability should be used.

The electrode pressure should ensure that the bumps are completely sub-collapsed when they reach the welding temperature so that the workpieces can fit closely. If the pressure is too high, the bumps will be crushed prematurely, and the function of projection welding will be lost.

The reduced flow density will reduce the strength of the joint, and the pressure will be too small to cause sub-heavy splashing.

Usually, the welding time of projection welding is longer than that of spot welding, and the flow is smaller than that of spot welding. Multi-point projection welding is a slightly longer welding time than single-point projection welding to reduce the difference in heating at each point caused by inconsistent bump heights.

Note: A variety of dimensional characteristics are also available (lengths, diameters, etc.)

The current required for each spot of projection welding is smaller than that of spot welding the same spot, but the current must be able to melt the bump before the bump is completely crushed. The welding current is approximately the current required for each bump multiplied by the number of bumps.

Application notes

This weld screw allows for welding directly to the surface of the sheet material. Three symmetrical weld projections on top of the head provide a robust weld that will not disfigure the sheet material's exterior surface. The screw head will not protrude through the sheet surface; therefore, a clean, smooth surface appearance is maintained. This weld screw is an ideal choice for blind locations since it can be easily pre-attached.

For applications that require a robust weld screw that can be applied directly to a sheet surface without leaving a protruding head on the opposite side of the sheet, this particular weld screw is an excellent choice. It is also an ideal choice for those designs that incorporate one or more blind attachment locations.

Juxin  Fasteners has 20 years of experience in the industrial fastener business. We carry a full suite of industrial fastener products and pride ourselves on our ability to stay abreast of all industry trends and developments.

We offer our customers

Competitive pricing

Fast and reliable delivery performance

Expert consultation

Friendly customer service

Size Can also be According to the Customer's requirement for manufacturing, please check the detailed specification sheet details PDF, CAD, 149-150 Page See more product details.

Packaging: The inner packaging is a plastic bag, and the outer packaging is a carton. Then the tray. Carton size: 29*19*19.5cm and 23.5*17.5*8, cm and pallet size: 215*100*90cm, or as your request