1 MN- Universal Test Machine Nose Gear Test Bench
A chassis test bench was built for the aviation industry that allows the performance data and functional capability of aircraft chassis to be examined after production.
The test bench is a customised unit and is unique with respect to its performance capability, innovative, simple operating concept and versatility. Test systems with this test purpose are essential when producing aircraft chassis, and enable suppliers to supply high-quality tested components to the market. This means that the use of the test bench represents a direct market advantage for chassis manufacturers.
The basic machine concept stands out thanks to a very rigid 4-column frame that also guides the crosshead, which applies the load via the adapter plate vertically into the corresponding chassis. The part is clamped between the floor plate and the crosshead. Depending on the type, chassis can generate considerable torques and shear forces also when the force is exerted vertically. These forces are absorbed by the system without compromising process security. The weight of the chassis varies between 50 and 600 kg. The height of the crosshead can be adjusted steplessly with a max. speed of 10 mm/sec.
The chassis is only tested under pressure.
There is a program filed in the sequence control for the test; this specifies the specific load profile for the chassis. Within the FGB controller ‘Flexion’, it is possible to select between path control and load control, and also to switch within a test cycle. Here, the limit sensor for the previously defined specific limits is always active. The recorded signals for test bench lift, force and test piece lift are used to determine the specific test parameters for the test piece. In this way it is possible, in particular, to determine the characteristic line values in addition to the various individual variables, e.g. the positioning force. Measurements can be presented in the required form.
In addition to a saved movement profile, certain test positions can also be approached. Various load limit values can be specified here. Additional measuring channels record information about the function of the chassis, e.g. the temperature of the hydraulic oil or the surface temperature of the shock absorber. The data allows valid statements to be made about the test piece behaviour and fast error analysis in case of error.
A protective device will be installed to ensure that the test bench is securely shielded and that persons are protected against flying parts in case of a failure. The safety equipment comprises a stationary and mobile safety fence components made of 8 mm thick polyacrylic panes. This prevents access to danger zones, and also prevents oils and nitrogen leaking in the event of a fault. This media is used under high pressure in the test bench and could pose a direct threat or a cause dust to swirl around if a line breaks.
The safety fence has two access doors on the side that need to be kept closed and monitored for safety reasons.
The FGB Steinbach protective fixtures meet the requirements of the Occupational Safety Act, the Industrial Safety Regulation and the Machine Directive 2006/42/EC.
Technical Data:
Installation surface:
approx. 2.5 m x 2.5 m
Height:
approx. 5.7 m
Weight:
approx. 40000 kg
Work height pressure plate:
min. 1000 mm
Travel path:
3000 mm
Travel speed:
max. 10 mm/sec.
Test force in Z:
max. 1 MN
Force resistance Fx on crosshead:
20 kNm
Torque support Mx on crosshead:
20 kNm
Force resistance Fy on crosshead:
5 kN
Torque support My on crosshead:
5 kNm
Test path:
800 mm
Work height adapter plate on crosshead:
1000 mm – 4000 mm
