Automotive Control Arm Fatigue Durability Testing Machine

The Automotive Control Arm Durability Test Bench is mainly used to perform durability tests on automotive control arms, tie rods, and stabilizer bars according to the required testing specifications.

Applicable Standards

ISO 16750 (Road vehicles — Environmental conditions and testing for electrical and mechanical components)

SAE J2140 (Automotive Suspension Component Durability Testing)

GB/T automotive component durability test standards

OEM-specific durability test specifications for automotive suspension components

Applications

Used for durability and fatigue testing of automotive control arms, wishbones, stabilizer bars, and suspension linkage components to evaluate their structural strength, fatigue life, and reliability under simulated road load conditions.

Parameter

Main Test Function

Used for durability testing of various automotive control arms (wishbone arms) and stabilizer bars.

Test Procedure

One end of the test specimen (usually the bushing end) is hinged to the base through a fixture. The other end (usually the ball joint end) is connected through fixtures to a vertically arranged actuator and a horizontally arranged actuator, respectively. The vertically mounted actuator drives the control arm to perform up-and-down oscillating movements, while the horizontally mounted actuator applies a horizontal load to the control arm. The two actuators are arranged vertically and horizontally, respectively.

The vertical actuator applies a load of ±10 kN with a stroke of 250 mm.

The horizontal actuator applies a load of ±25 kN with a stroke of 200 mm.

Structural Introduction

1. Main Frame

Platform-type structure. The test platform is machined to ensure the accuracy of the test reference plane.

The vertical actuator is installed on an inclined cantilever beam, while the horizontal actuator is installed on a horizontal sliding seat. Both the sliding seat and the inclined beam can be adjusted in position on the test platform.

2. Electro-Hydraulic Servo Actuator

Suitable for dynamic and static test applications.

Vertical loading actuator test force: ±10 kN; Horizontal loading actuator test force: ±25 kN.

Double-rod piston structure: Vertical actuator stroke: 250 mm; Horizontal actuator stroke: 200 mm.

The piston and piston rod surfaces are hard chrome plated.

High-speed sealing elements are used between the piston and cylinder body, as well as between the piston rod and end cover. High-speed support rings are adopted to provide support, ensuring high actuator stiffness and strong lateral resistance.

The actuator is equipped with a dynamic displacement sensor, an external electro-hydraulic servo valve, and a force sensor, providing two closed-loop control systems for force and displacement control.

The force sensor is installed at the piston rod head and equipped with a preloaded ring to ensure reliable connection during dynamic testing.

Hydraulic cushioning zones are designed at the actuator amplitude limit positions to prevent damage caused by uncontrolled operation.

3. Sensors and Servo Valve

Proportional Servo Valve: 21 MPa, 60 L/min; directly integrated with the actuator through a servo valve connection block.

Force Sensor: ±30 kN. ±20 kN sensor adopts imported U.S. products, with 150% overload capacity. Combined with the control system, the static accuracy is ±1%; dynamic accuracy is ±3%; phase coordination accuracy is ≤2°.

Displacement Sensor: Magnetostrictive non-contact dynamic type. Effective measuring range (displacement): ±150 mm / ±100 mm. Combined with the control system, indication error is ±0.5% FS; axial displacement measurement accuracy is 0.001 mm. Sensors are calibrated before delivery.