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Why are there 4 stages in resistance spot welding joint formation? What does it do?
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Why are there 4 stages in resistance spot welding joint formation? What does it do?
Release time:2022-06-16 15:57
Summary of information:
1. The role of the pre-pressure stage is to 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 to seal the nugget.
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.
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Why are there 4 stages in resistance spot welding joint formation? What does it do?
Release time:2022-06-16 15:57
Summary of information:
1. The role of the pre-pressure stage is to 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 to seal the nugget.
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.
Hot product recommendations
-
300KVA copper bar soft connection diffusion welding machine
Power: 300KVA Model: DBTH-300 Overlap: Copper skin, copper strip, copper foil soft connection, stainless steel, etc., and can also weld dissimilar materials. The hydraulic high-power medium-voltage medium-frequency copper bar soft connection diffusion welding machine mainly welds the same multi-layer copper strip, copper foil and copper skin into soft and hard copper bar connectors. It can also weld stainless steel strips, titanium zirconium and tantalum strips and multi-layer dissimilar materials. Mainly used for conductive connections in new energy vehicles, electric power stations, electrical switches, smelting power supplies, welding machines and other industries.
-
150KVA copper strip soft connection diffusion welding machine
Power: 150KVA Model: DBTH-150 Overlap: soft connection of copper skin and copper strip, stainless steel, etc., and can also weld dissimilar materials. The variable frequency polymer diffusion welding machine is a welding method that brings the surfaces of workpieces into contact with each other under a certain temperature and pressure, causing a fine liquid phase to be produced on the surface of the workpiece and gradually diffusing each other to achieve bonding. It is mainly used for soft connections of new energy vehicle batteries, soft copper bar connections of power supplies, secondary output connections of large power supplies in petrochemical industry, smelting, welding machine connection copper strip joints, etc.
-
SUN pneumatic automatic flash butt welding machine
1. Originated in 1993 2. Xinxing’s 26-year history 3. Always adhere to all-copper welding machines 4. 10-year long design life 5. 20-year service life record 6. Serve 4000+ customers 7. CQC certified products
-
UN6 flash pneumatic resistance butt welding machine
The UN6 flash pneumatic resistance butt welding machine is widely used in the butt jointing of various metal round materials, flat materials, and pipes. With different special molds, it can also weld various special-shaped materials and copper and aluminum pipe joints. The UN6 flash pneumatic butt welding machine adopts pneumatic clamping and pneumatic transverse upsetting. It is also equipped with a special butt welding controller, which can accurately adjust the welding current and welding time. The welding output can be configured as required and adopts two control methods, primary voltage feedback and secondary current feedback, to ensure consistent welding current. Just step on the foot switch to complete the entire welding process. The machine has a high degree of automation and stable welding quality. Compared with the previous standard version, the welding stroke limit and upsetting air pressure conversion functions have been updated. The non-standard version is controlled by PLC programmer, and can be equipped with optional tempering device, ejector cylinder, and positioning cylinder auxiliary action. In addition to the above extended functions, the high-end version adopts modular design and linear guide rail guidance for higher precision and easier maintenance. Please read below for advantages and features
-
DBZ medium frequency resistance spot welding machine
Xinxing medium frequency inverter pneumatic resistance spot welding machine is a three-phase alternating current that is rectified into DC, and then through an inverter circuit composed of IGBT power devices, it is converted into an intermediate frequency 1000-4000HZ AC square wave output. After being stepped down by a transformer, it is rectified into DC and supplied to the electrode for welding the workpiece. Current feedback and pulse width modulation (PWM) are used to obtain stable current output. It is one of the cutting-edge resistance welding methods today. The medium-frequency resistance spot welding machine can be used for spot welding and multi-point projection welding of ordinary low carbon steel plates, stainless steel plates, galvanized sheets, aluminum plates and wires. It can also be used for spot welding and nut projection welding of high-strength steel and hot-formed steel in the automobile manufacturing industry, as well as resistance brazing and spot welding of copper wires in the high and low voltage electrical industry, brazing of silver points and copper plates, composite silver point welding, etc. Please read below for advantages and features
-
Semi-automatic CNC UN2S copper rod resistance butt welding machine butt welding machine
1. This series of products ranks top 2 in the national market share 2. Originated in 1993 3. Xinxing’s 28-year history 4. Always adhere to all-copper welding machines 5. 10-year long design life 6. 20+ years service life 7. Serve 5000+ customers 8. CQC certified products 9. 90% repeat customers
-
160KVA copper stranded wire pneumatic butt welding machine
Model: UNG-160 Power: 160kva Butt: 50~300 square meters of copper stranded wire, aluminum stranded wire, copper rod, aluminum rod 160KVA copper stranded wire butt welding machine adopts pneumatic pressurization, photoelectric positioning, touch screen programming control, water cooling, low-voltage and high-current intelligent resistance welding machine, and welds copper multi-strand wires and aluminum multi-strand wires with sleeves Wire, stranded conductor, welded firmly in 2 seconds, smooth and without flash. Please read below for advantages and features
-
UNG precision multi-stranded copper wire butt welding machine
Model: UNG-5 Power: 5Kva Suitable for: rapid welding of multi-stranded conductors, copper strands, tinned copper strands, and aluminum strands in wire and cable factories. The UNG precision multi-stranded wire butt welding machine is a single-phase AC resistance butt welding machine. This welding machine is mainly used for welding multi-strand conductors in the wire and cable industry. It is used with casings and is welded and formed in one go. The joints are strong and beautiful, with no flash or burrs, and the wire diameter does not change. It can be directly threaded through the mold, so that the production can be changed without stopping the machine.
-
CNC type UNG multi-stranded wire butt welding machine butt welding machine
Model: UNG-5 Power: 5KVA CNC UNG multi-strand wire butt welding machine belongs to the single-phase AC resistance butt welding machine category. This welding machine can butt weld 0.75-10 square meters of copper multi-stranded wires, 4-16 square meters of aluminum multi-strand wires and various metal wires, such as steel wires, copper wires, aluminum wires, titanium alloy wires, etc. It is suitable for the welding of round rods and small wires in wire drawing, cable and metal wire processing industries. 1. Xinxing’s 30-year history 2. Always adhere to all-copper welding machines 3. 10-year long design life 4. 20+ years of service life 5. Serving 11,000+ customers 6. CE certified products 7. 90% are repeat customers
-
50KVA pneumatic multi-stranded wire butt welding machine
Model: UNG-50 Power: 50KVA Butt connection: 16-120 square copper stranded wire, 25-120 square aluminum stranded wire, tinned stranded wire φ4-12 copper rod φ4-16 aluminum rod Pneumatic multi-strand wire butt welding machine is one of the resistance welding machines (butt welding machines). A pneumatic butt welding machine developed by Xinxing Welding Equipment Factory in 2005. It adopts pneumatic clamping and pneumatic transverse upsetting, and is equipped with an internal and external full water cooling system and a special butt welding controller, which can accurately adjust parameters. At the same time, it can be used with casings to weld multi-core wire harnesses and single-core copper wires without burrs.