Quick Answer: How Far Apart Should Spot Welds Be?

Spot Weld Spacing It is recommended that distance between two spot welds should be a minimum of 10 times the material thickness.

How thick can you spot weld?

Spot welding is primarily used for joining parts that are normally up to 3 mm in thickness. Thickness of the parts to be welded should be equal or the ratio of thickness should be less than 3:1. The strength of the joint depends on the number and size of the welds. Spot-weld diameters range from 3 mm to 12.5 mm.

What size are most spot welds?

The two materials being welded together are known as the workpieces and must conduct electricity. The width of the workpieces is limited by the throat length of the welding apparatus and ranges typically from 5 to 50 inches (13 to 130 cm). Workpiece thickness can range from 0.008 to 1.25 inches (0.20 to 32 mm).

What is weld spacing?

A spot weld spacing (pitch) is a center-to-center distance between two adjacent spot welds within the same row. An edge margin is a center-to-edge distance between a spot weld and the material edge.

How much of a build up of weld do you want on a spot weld?

Start the weld and hold for about 2 seconds, any longer and a puddle will build and the weld will not end up flat on the panel. You want to have amperage of your welder set about 25% higher than you normally would for the thickness of metal you are welding.

Is a spot weld strong?

The test, In this case, illustrated that the spot weld had an Ultimate Tensile Strength of 3261Kg compared to 1294Kg for an 8mm MIG plug weld.

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How hard is it to spot weld?

Spot welding is quick and easy. There is no need to use any fluxes or filler metal to create a join by spot welding, and there is no dangerous open flame. Spot welding can be performed without any special skill.

What is a good spot weld?

Materials Appropriate for Spot Welding Due to its lower thermal conductivity and higher electrical resistance, steel is comparatively easy to spot weld, with low carbon steel being most suited to spot welding. Also, with zinc alloys, the copper electrodes rapidly degrade the surface and lead to a loss of weld quality.

What is weld time in spot welding?

Weld Time is the time during which welding current is applied to the work in making a weld. It is measured in cycles of line voltage as are all timing functions. One cycle is 1/60 of a second in a 60 Hz power system.

How do you dimension a weld?

The dimensions of a weld may be added to a drawing in the following manner. Dimensions relating to the cross section of the weld are symbolized by b and are given on the left-hand side of the symbol. The cross-sectional dimension to be indicated for a fillet weld is the leg length.

How does Spot welding work?

Spot welding works through conductive heating, which is created by an electrical current. Classic spot welding positions two copper alloy electrodes, which hold the two pieces of metal together. The electrical current flows through the electrodes, creating concentrated heat to melt the metal.

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Why are my spot welds not holding?

The most common causes are: Misaligned electrodes: ensure the tip size is correct and that the tips are aligned and applied square to the sheet when the electrode force is applied. Contaminated electrode tip: electrodes normally become oxidised or coated with zinc when welding galvanised steel.

Are welds weak points?

Customer designed his part out of 303 stainless steel, the weld is indeed going to be weaker than the parent material and will be a failure point. However, that same part made from annealed 304L may actually be stronger at the weld.

What makes a bad weld?

Signs of a bad weld include: Underside of weld has insufficient penetration, excessive globules of metal, over-sized weld, undersized welds, undercut, overlap, incomplete fusion, porosity and/or cracking. Excessive grain growth or the presence of hard spots cannot be determined visually.