Metal sheet spot-welding joint impact performance test device and method

A metal sheet and impact performance technology, which is applied in the field of impact performance testing devices of metal sheet spot welding joints, can solve the problems affecting the accuracy of impact force measurement results, affecting the transmission of impact energy, affecting the accuracy of measurement, etc., and achieves inertial force The effect of small impact, improved measurement accuracy, and improved accuracy

Active Publication Date: 2015-09-09
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This kind of testing machine does not directly measure the impact force, but uses the support reaction force measured by four force-measuring units to obtain the impact force through conversion. Due to the complex structure of the force-measuring circuit and many intermediate conversion links, it affects the accuracy of the impact force measurement results.
In addition, the double pendulum scheme is adopted, the stru

Method used

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  • Metal sheet spot-welding joint impact performance test device and method
  • Metal sheet spot-welding joint impact performance test device and method
  • Metal sheet spot-welding joint impact performance test device and method

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Embodiment Construction

[0038] The present invention will be further described below in conjunction with drawings and embodiments.

[0039] combine figure 1 and figure 2 , The metal sheet spot welding joint impact performance testing device of the present invention includes an impact testing machine, an impact fixture 6, a control system, a data acquisition system and a data processing system. The impact testing machine is composed of a base 1, a column 2, a pendulum shaft 8, a pendulum 5, a pendulum angle dial 3, a pendulum taking mechanism and a safety pin 4. The column 2 is fixedly installed on the base 1, the swing angle dial 3 is installed on the upper end of the column 2, the pendulum taking mechanism (not shown) composed of a servo motor and a clutch is installed on the upper part of the column, and the safety pin 4 for locking the pendulum Installed in the middle of the column. Such as image 3 , Figure 4 and Figure 5 As shown, the pendulum 5 is composed of a pendulum 52 and a pendul...

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Abstract

Provided is a metal sheet spot-welding joint impact performance test device composed of an impact tester, an impact fixture, a control system, a data acquisition system, and a data processing system. When the device is used to test the impact performance of a spot-welding joint, the two ends of a test sample are respectively fixed to a movable jaw and a fixed jaw of the impact fixture, a pendulum bob is used to apply impact load to the spot-welding joint to break the spot-welding joint, the data acquisition system acquires the impact on the spot-welding joint measured by a force measuring sensor arranged between the fixed jaw and a fixed jaw support, the displacement of the free end of the test sample measured by a laser displacement sensor arranged on the side of the movable jaw and the angle of the pendulum bob, and the data processing system gives the limit load, limit load displacement, limit load impact absorption energy, total impact absorption energy, impact-time curve, displacement-time curve, speed-time curve, impact-displacement curve and impact absorption energy-time curve characterizing the impact performance of the spot-welding joint to evaluate and study the impact performance of the spot-welding joint.

Description

technical field [0001] The invention relates to welding technology, in particular to a device and method for testing the impact performance of spot welded joints of thin metal plates. Background technique [0002] The spot welding connection process of metal sheets is widely used in the field of automobile manufacturing. The connection strength of spot welding joints directly affects the safety and service life of the automobile body, and is an important indicator for evaluating the safety performance of automobiles. In the past, the static method was mainly used to test the strength of spot welded joints, that is, to apply quasi-static tension to various spot welded samples such as tensile shear, cross tensile or tensile peeling, to obtain the maximum load when the spot welded joint is damaged Capability (ultimate load), deformation (displacement) and absorbed energy of the sample at the moment corresponding to the ultimate load, failure mode of solder joint (welding nugget...

Claims

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Application Information

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IPC IPC(8): G01M7/08
Inventor 花福安李建平牛文勇孙涛宫传慧王国栋
Owner NORTHEASTERN UNIV
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