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OTHER WELDING

GAS PRESSURE WELDING

This method heats and joint rails with oxygen and acetylene gas flame pressing the rail joint.

Advantages

1Rail joint method with high joint strength and higher reliability

2Suitable for welding at base

Gas pressure welding at base Gas pressure welding at base Gas pressure weld zone Gas pressure weld zone

TENSION GAS PRESSURE WELDING

Using rail tensor and a gas pressure welder, this method controls the longitudinal force of the rail on track by a computer to dispense with additional restressing of rail. It has proven its performance in Shinkansen.

Gas pressure welding with rail tensor on Shinkansen site Gas pressure welding with rail tensor on Shinkansen site

ENCLOSED ARC WELDING

This method encloses a rail joint with copper blocks and welds by manual arc welding. We offer also semi-automatic welding,
which enables to shorten its working time.

Semi-automatic welding of rail Semi-automatic welding of rail
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CONDUCTIVITY ENHANCED BRAZING

CONDUCTIVITY ENHANCED BRAZING CONDUCTIVITY ENHANCED BRAZING

A brazing method is applied to rails with low vehicle passing frequency in order to enhance conductivity of a rail signal current. A low-temperature welding method to groove the running surface of rail and braze with oxygen and acetylene gas flame.

FINISH INSPECTION

Finish inspection of rail weld zones is important work to confirm their quality.
Properly finished weld zones result in a comfortable train ride and curb noise.
Our qualified engineers conduct highly reliable inspection to satisfy customers' requests.

Finish Test Examples

Gas pressure weld zone

Magnetic particle test (surface defect test)

Goldsummit weld zone

Liquid penetrate test (surface defect test)Ultrasonic test (internal defect test)

Enclosed arc weld zone

Finish accuracy test of running surfaceFigure of ultrasonic test without defect
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