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Principle of Spot Welding

Our welder's Capability

How-To-Use Our welder

Welding Stainless Steel

Thermocouple Welding

Welding with Nickel Plates

Welding with Metals
e.g. Aluminum, Steel, Phospate Bronze

Product Comparison

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Spot Welder HSW-01A

Spot Welder HSW-02A

Spot Welder HSW-03

Optional Accessories

Recommended Packages

Nickel Plates

Price and Purchase

User's Voice

F A Q (General)

FAQ(Technical)

WELDING WITH ALUMINUM
Welding aluminum

Welding with aluminum is more difficult than with stainless or nickel. As it is written in the Principle page, aluminum easily conducts electricity. Thus, although the electric current flows, not much heat is produced and in addition, the heat escapes easily-making it hard to do spot welding.

However, a think plate around 100 micron (0.1 mm) is able to be welded with HSW-02A.
About welding capability, please click HERE.

Welding of a thin plate of aluminum needs the release of a large amount of electric power in a short time and also the heat release so that the aluminum material will not break down.
In the photo above, a stick electrode is the way to tackle the heat release problem. Also, for the tip of the welding pen, it would better if the tip is a bit round rather than sharp.
In addition, adequate plunge pressure needs to be applied while the welding is on the process.
1点集中の図
If welding pinset is used, the heat released will not be enough, making a hole which causes the welding to be unstable.
    For details about aluminum foil which is able to be welded by Yokodai.JP HSW-02A, please click HERE.
WELDING WITH PHOSPATE BRONZE

Phospate bronze tub were welded to AA battery

Phospate bronze (C5191) is a metal alloy of bronze, tin, and phosphate. It is strong against tension, and it is frequently used as an electrode's spring material Lead is sometimes added to the alloy, but the percentage is so small that there will not be a problem with RoHS.

  Since it has almost the same conductivity rate and heat transfer rate with nickel, the spot welding process is also almost the same as nickel.
About welding capability, please click HERE.

Strength evaluation
List of Conductivity Rate and Heat Transfer Rate of Metals (under room temperature)
Metal Name
Conductivity Rate
Heat Transfer Rate
W/(m K)
gold
45.5
320
silver
61.4
420
copper
59.0
390

aluminum

37.4
236
phosphate bronze

13~15

133
nickel
14.5
113
stainless steel
6~9 
15~25
iron
9.9
84
  For strength evaluation result, please click HERE.
WELDING WITH STEEL (SS/SK) BLOCKS AND DIFFERENT KIND OF METALS

Many kind of strips welded to steel block

 

welded to steel block(ss400)

 

 

welded to steel block (SKD11)

(UPPER PICTURE) SS50C Steel Block (16x60x60mm)

(FROM LEFT) inside () is thickness in mm
nickel (0.08)
nickel (0.15)
SS steel (0.2)
brass (0.2)
phosphate bronze (0.2)
nickel silver (0.2)
stainless steel (0.2)

(MIDDLE PICTURE) SS400 Steel Block (16x60x60mm)
nickel (0.08)
nickel (0.15)
SS steel (0.2)
brass (0.2)
nickel silver (0.2)
phosphate bronze (0.2)
stainless steel (0.2)

(LOWER PICTURE) SKD11Steel Block (16x60x60mm)
nickel (0.08)
nickel (0.15)
SS steel (0.2)
brass (0.2)
phosphate bronze (0.2)
nickel silver (0.2)
stainless steel (0.2)

  *) HSW-02A, HSW-EB1 (electrode) were used.
Bronze line welded to steel block
SKD11 Steel Block and 0.45 mm Bronze line
WELDING WITH STEEL (IRON) PLATE
Welding with steel plate

Steel plate is able to be welded in the same measure as stainless. Spot trace will appear really clear just as stainless welding using HSW-02A.

About welding capability, please click HERE.

  For strength evaluation results, please click HERE.