Testing of Wheels, Rims, and Tires
Industry brochure: Aotomotive PDF
Testing of Wheels
In the automotive sector, wheels are made of steel, light metal, or composite materials and their tires. Tires are complex composite bodies composed of materials with various physical properties. As the link between the roadway and the vehicle, they transfer all forces and torques. Zwick testing systems are used to determine the quasi-static and dynamic properties of wheels and tires. This ranges from standard tests on rubber, textiles, and wires to tests on the entire wheel/tire system.
- Testing of Tires Wheels
The stiffness of automobile tires is determined by measuring the force ratios under vertical and horizontal loads as well as variable tire pressure. A Z050 materials testing machine is combined with a horizontal linear unit and a multi-component force measuring platform on the lower fixed crosshead. The respective testXpert® test program enables you to perform the desired tests under vertical and horizontal loads with varied tire pressure and evaluate them.
- Testing of Tires Components
Testing axial deformations of the rim flange
To determine stiffness properties, compression tests are performed on the rim flange with a special pressure spindle. For this, a floor-standing testing machine with a forward projecting, height-adjustable T-slot crosshead is used. This way the rims can and be positioned at an ergonomically comfortable height in the test area and be affixed. The load cell ensures exact measurement of the axial force, even if lateral forces occur due to the geometric shape of the rim. Due to its special construction and placement, the load cell can be inserted into the upper and lower test area of the machine for measurements.
Hardness Test on a Flange
For steel and aluminum rims, hardness tests are primarily performed to Brinell method HBW 2.5 or Rockwell tests (for example, HRB) for production control purposes and also to ensure strength characteristic values. In addition, loads of up to 250 kg can be performed using closed loop controlled technology for all classic hardness test methods (Brinell, Rockwell, Vickers, Knoop, and ball indentation hardness) for metal and plastic applications. Even large components can be easily accommodated in the 250 x 300 mm (D x H) test area.