Article
1. The role of pre-pressure stage useResistance spot welding machineAt this time, preloading can reduce contact resistance, increase conductive cross-section, and increase physical contact points, creating conditions for the smooth passage of welding current in the future; in addition, under the action of pressure, the plastic deformation caused by the extrusion of metal into the gap helps to form a transparent sealing layer around the nugget that seals the nugget.
The size of the pre-pressure should be adjusted according to the thickness, stiffness and surface condition of the workpiece. Preheating methods can be used to reduce the pre-stress, or electrodes of different shapes can be replaced to change stress and deformation.
2. The role of electric heating stage
Under the combined action of heat and mechanical force, a plastic ring and a nugget are formed until the nugget grows to the required size.
3. The role of maintenance phase
Ensure that the nugget crystallizes under pressure, reducing the chance of shrinkage cracks and other structural defects.
4. The role of the resting stage
At this time the electrode is lifted and a spot welding cycle is completed.
Wuxi Xinxing Welding Equipment Factory has been engaged in resistance welding machines for 29 years. Its core technical products include: semi-automatic butt welding machine, pneumatic-flash butt welding machine, multi-strand wire welding machine, foot pedal spot welding machine, pneumatic spot welding machine,Medium frequency spot welding machine, row welding machine mesh welding machine, resistance automatic welding machine, energy storage welding machine, copper rod and aluminum rod circular welding machine, auto parts spot welding machine, sheet metal parts spot welding machine, home appliance hardware spot welding machine, small electrical appliance spot welding machine, copper row copper pipe welding machine, nut spot welding machine, stainless steel welding machine, foil strip spot welding machine, aluminum spot welding machine, There are more than 300 types of multi-head spot welding machines, bag cage spot welding machines, mesh welding machines, ton rack welding production lines, resistance automatic welding machines, brazing machines, diffusion welding machines, projection welding machines, seam welding machines, wire and cable optical cable supporting equipment, etc. If you are interested in our welding equipment, please contact us.