Test Equipment

We supply a wide range of test equipment such as machines to test axle bending under varying loads, fatigue test machines, and high-speed brake testing machines.

Variable load rotational bending fatigue tester for railcar axles

Outline

It is very important to accurately assess the actual strength of axles to make them both adequately safe and lightweight. Due to test equipment limitations, fatigue testing on actual axles has been conducted under fixed amplitude loads. However, the loads on actual cars constantly fluctuate, and it would be difficult to say that actual conditions have been recreated in those tests. Therefore, a new tester, capable of simulating variable load conditions closer to actual operation, was introduced in 1995 to replace the conventional fixed -load rotational bending fatigue tester.

Characteristics

Testing simulating actual conditions
We can verify the fatigue strength of axles, including the fitted parts, by assembling test wheels and a test axle that matches an actual axle.
Testing by automatic control
Tests can be conducted at maximum loads of up to 157kN, and programming the conditions allows for long-term unattended operation testing.

High-speed brake tester for railcars

Outline

With the increasing speed of trains, the need to investigate high-speed braking performance of brake disks for railway applications has increased. Therefore, we introduced a high-speed brake test machine in 2001 in addition to our conventional tread and disk brake test equipment. In addition to brake testing at the equivalent of up to 600km/h, this machine also handles basic brake performance tests and durability tests, as well as run-curve test conditions similar to those in an actual car, with controlled brake torque and deceleration rate.

Characteristics

Brake testing compatible with increased speeds
Brake testing is possible at maximum speeds of 600km/h (with a wheel diameter of 860mm), making it possible to perform high-speed compatible brake performance and durability testing. (16 ton-equivalent severe-load brake testing is also possible at 400km/h with a wheel diameter of 860mm)
Various brake control tests (run-curve)
Brake tests are also possible with constant torque control and constant deceleration rate control, making it possible to conduct brake tests under conditions similar to those in actual operation, taking grade, run-curve, running wind, etc. into consideration. Test data, such as average friction coefficient and torque can also be automatically recorded.

High-speed loaded spin test equipment exclusively for railcar drive units

Characteristics

High-speed compatible
We have achieved maximum test speeds of 500km/h (200km/h faster than our conventional test performance), making the testing equipment compatible with high-speed train development.
Evaluation under actual car torque loads
In the past, performance was verified by running tests on actual cars after the cars had been completed. With this testing equipment, characteristics can be simulated under actual torque load conditions.
Analysis and predictive design of acoustic characteristics
By employing a semi-anechoic chamber and an axel and pinion shaft drive system, we can now analyze the noise sources and acoustic characteristics from the drive unit itself, without any disturbance from other noise sources, facilitating more accurate predictive design.

Railcar bogie spin testing rig

Outline

High-speed railway systems such as the Shinkansen have drawn attention from the viewpoints of environmental and energy issues. At the same time, much higher speeds are being pursued. The bogie spin testing rig has rotating rail-wheels that correspond to rails, on which a load frame, which corresponds to an actual car body, is set. This allows the various problems that arise when a railcar is running at high speeds, such as running instability, to be worked out in advance.

Characteristics

High-speed compatible testing
Having attained a maximum test speed of 500km/h, we can conduct running-stability validation tests that are compatible with the future development of high-speed performance.
Evaluation under actual car torque loads
In the past, performance was verified by running tests on actual cars after the cars had been completed.
With this testing equipment, characteristics can be simulated under actual torque load conditions.
Testing for all types of bogies
The track gauge and axle center-distance are all variable on the test machine to enable testing of a variety of bogies.

Fatigue test equipment for railcar bogies

Outline

Railcar bogies must meet extremely high standards. It is also important that they are lightweight. Using the bogie fatigue tester, we can conduct strength assessment tests to check long-term serviceability by applying repetitive loads that simulate actual usage conditions of real bogies.

Characteristics

Testing under various load conditions
Testing can be conducted under various load conditions, such as several sine wave and rectangular wave load waveforms, and load waveforms that simulate actual conditions.
Evaluation under actual car torque loads
In the past, performance was verified by running tests on actual cars after the cars had been completed.
With this testing equipment, characteristics can be simulated under actual torque load conditions.
Testing by automatic control
Fatigue testing under long-term unattended operating conditions can be conducted by automatic control.

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