Fastener fatigue testing machine

The fastener fatigue testing machine is a universal testing system driven by an unbalanced motor. The fatigue testing machine can perform fatigue tests on axial, bending, and torsional loads (with the aid of fixtures).

Introduction

The fastener fatigue testing machine is a universal testing system driven by an unbalanced motor. The fatigue testing machine can perform fatigue tests on axial, bending, and torsional loads (with the aid of fixtures). The resonance system is designed based on three sets of quality systems. Dynamic loads are loaded by unbalanced motors, while static loads are loaded by gear/chain variable speed motors.

The static drive unit is installed at the bottom of the test bench and provides adjustable limit switches. The static driving unit can be manually controlled, and the test load can be displayed on the display of the control system. The system can be operated and tested with load, displacement, and strain control. The testing machine will be equipped with a standard flange shaped specimen upon delivery. The system can be equipped with displacement and strain sensors.

POWER SWING MOT ， The nominal load of 100kN, 250KN, and 300KN are optional

Dynamic load ± 50kN, static load ± 100kN

Mechanical structures, including load-bearing frames with vibration systems and force sensors

EXCITING MOT control cabinet unit used for resonance testing

Software package EMOTION II, with English WINDOWS 7 operating system

22 'TFT LCD display

19 'control cabinet with digital preamplifier

The control cabinet countertop is made of Corian material

File output: There are 2 standard output formats, configured with a color printer

Graphic tools: oscilloscope function, loading signal graphics, graphical display of test startup process

Characteristics of fastener fatigue testing machine

The efficiency of external force doing work during resonance reaches *, and at this time, the elastic energy and kinetic energy in the system are converted into each other. The external force is only used to overcome the damping force (opposite phase), so the power consumption is extremely low. The equipment ensures the reliability and accuracy of measurement data, as well as safety and stability.

The resonant fatigue testing machine can significantly shorten the testing time due to its high operating frequency The frequency of the motor resonance high-frequency dynamic fatigue testing machine can reach 150Hz

For, the system provides displacement and frequency deviation detection functions. In testing, once the initial crack is initiated in the specimen, the resonance frequency will shift. Once the set frequency shift value is reached, the machine will automatically stop. At the same time, real-time monitoring of the curve on the monitor can observe changes in frequency and load. Afterwards, by using a flaw detector to test the specimen, it is easy to locate the location and length of crack initiation. Due to the occurrence of cracks in the specimen, the stiffness decreases, leading to a decrease in resonance frequency. Based on this, the control system can set an automatic shutdown. For example, if the resonance frequency decreases by 1Hz, the system will determine that the specimen is ineffective. In this way, the failure criteria for a batch of specimens will be unified, and the estimation of mean life and standard deviation will be more accurate. The equipment has safety shutdown and emergency shutdown protection functions, and the function of automatically unloading the loading system after shutdown. The equipment does not require a large space, and the specially designed foundation has low noise during operation. Therefore, it is convenient to use, easy to transport, and has minimal environmental pollution. The equipment can work continuously.