Cycle bending stress fatigue test rig

Abstract

A cycle bending stress fatigue test rig belongs to the technical field of automobile component detection. The test rig comprises a frame unit, an electrical control unit, a load unit and a detecting unit. The electrical control unit is fixedly arranged on the frame unit and connected to the load unit; the load unit is suspended under a bearing mechanism; and the detecting unit is arranged on the load unit and connected with the electrical control unit. According to the invention, an offset displacement of the cantilever angle is controlled by adding and subtracting of counterweight blocks, soas to finally guarantee a preset loaded normal plane offset included angle reach relative technical requirements. When a main shaft is rotating at a preset high speed, a workpiece can always be subject to a load force, which is perpendicular to an axial direction and vertically downward, so that fatigue working conditions of the workpiece subject to a cycle bending stress can be simulated by the rig; meanwhile, the rig can be applied to various other disc components with suitable sizes.

Description

technical field [0001] The invention relates to a device in the technical field of auto parts detection, in particular to a cyclic bending stress fatigue test bench. Background technique [0002] The test bench is a test equipment used to test the fatigue strength and fatigue life of materials with a certain strength. Under normal circumstances, the device for testing two indicators often adopts a column structure, and the test for this indicator is completed through the relative torsion between the upper and lower main shafts. [0003] However, after searching the existing technical patents, it can be known that the Chinese invention patent number is 200810034298.2, and the patent application publication number is CN 101236148A. The patented rotary bending fatigue testing machine is only used in the testing of magnesium alloy materials, and only for small parts with small size and simple structure. The bending fatigue test can be carried out on the surface, and the preset ...

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Problems solved by technology

[0003] However, after searching the existing technical patents, it can be known that the Chinese invention patent number is 200810034298.2, and the patent application publication number is CN 101236148A. The patented rotary bending fatigue testing machine is only used in the testing of magnesium alloy materials, and only for small parts with small size and simple structure. The bending fatigue test can be carried out on the surface, and the preset loading bending stress cannot be realized in the radial direction, and in terms of its material, it can only be applied to light alloy materials, such as magnesium alloy, aluminum alloy, etc., and cannot be completed with larger diameter and heavier weight. Parts testing, its application range is too small, not ideal

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