Test principle and diagram of impact testing machine

Jinan Hengsi Shanda Instrument Co., Ltd. has been committed toImpact testing machineIn the front end of the manufacturing and production industry, our company's technicians have introduced the following principles, schematic diagrams and calculation formulas:

The impact test (also known as Swift depth drawing test and LDR test) is to draw the sample deep-forming using a flat-bottomed φ50mm faucet (Figure 1). During the test, the method of increasing the diameter of the test piece Do step by step. The tensile tester determines the diameter Domax of the bottom of the cup body that is not pulled and can pull the flange into the die, and uses the following formula to calculate the ultimate depth drawing ratio (LDR) as the performance index for drawing forming.

LDR=Domax/dρ

The larger the LDR, the better the depth drawing performance of the material tester