How to choose tin soldering, resistance welding, or laser welding?

Comparison of tin soldering, resistance welding, and laser welding

1. Principle comparison

Tin soldering:

Tin melt and enclose the metal surface,produce a firm alloy layer between tin and metal by chemical reaction,metal doesn’t melt,the alloy layer can be dismantled;

Resistance welding:

Large current passes the resistor and produce large heat.

Large heat and high mechanic pressure melt and bold the metal.It needn’t extra welding stuff,and cann’t be dismantled;

Laser welding:

Laser beam melts and bond the metal by high temperature.It needn’t extra welding stuff,and cann’t be dismantled.

2. Detailed Comparison Table

Items Tin soldering Resistance welding Laser welding

Temperature: Low (180~250℃) Extremely high (1000℃+) Extremely high (1000℃+)

Heat area: Larger Large Very small

Connection strength: Medium High Very High

Repairable Re-weldable Non-removable Non-removable

Accuracy: General Medium Very High

Equipment cost: Low Medium High

3. Application:

Soldering:

PCB board/component lead/cable/terminal.

Suitable for: large quantity, low cost, repairable;

Resistance welding:

component lead/cable/terminal.

Suitable for: strong connection,anti high temperature;

Laser welding:

Automotive and medical product

Suitable for:precise,minature,and heat-sensitive product.

4.Comparation:

Tin soldering:

Advantages: Low cost, no damage to components(low temperature), suitable for PCB, reworkable.

Disadvantages: common bonding strength, large solder joints, significant thermal impact;

Resistance welding:

Advantages: High bonding strength,anti high temperature,fast speed.

Disadvantages: large heat effect,non-repairable;

Laser welding:

Advantages:High precision,minimal thermal impact,high bonding strength,anti high temperature;

Disadvantages: expensive cost

5.CJR welding machine:

CJR have been dedicated in thermistor resistance welding for 20 years,pls get the detailes from the following link:

https://www.szcjrmachine.com/video/products-detail-4989684