Stone hammer blow testing instrument
Stone hammer blow testing instrument mainly simulates the actual driving condition of the vehicle, and the individual parts of the vehicle body are often impacted by heavy objects such as sliding material and pavement gravels. Thus, the products are damaged. The product damage degree is determined by injection Angle, injection pressure, number of injection, airflow speed, the specification and quality of steel shot or gravel, impact duration and test instrument.
Work Principles
A certain weight of gravel is bounced into the feeder by vibration. Due to the vacuum formed by the high speed air flow in the lower part of the feeder, the collision medium is sucked into the ejection gun assembly, and then is shot into the test sample by the jet stream. After the medium hit the test target, the medium falls into the gravel collecting box. The test machine causes a large number of steel balls or rubble with sharp edges to hit the sample surface in a short time. The whole experiment is carried out under a controlled temperature. After the impact is finished, the loose coating is removed with adhesive tape to reveal the residual stone strike marks on the sample, which can be used to judge the performance of the resistance to stone impact by analyzing the damage degree of the sample.
Standards
SAE J400，VDA 621427，ISO 20567-1，ASTM D3170，GMW14668-3.4.9，Peugeot/Citroen D241312，Chrysler 463PB-52-01 、Chrysler 463PB-39-01，Mazda MES MN 601C ，Toyota，Nissan，Ford BI 157-04、Ford BI 157-05.
The new gravel impact tester is assembled by standard component and equipped with easy handling accessories, achieving gravel impact against all the main standard automotive materials on this one machine. It is the only instrument in China that adopts the universal adjustment device, and the 0-180 impact angle can be adjusted arbitrarily.( the so-called mufti-functional instruments produced by other manufacturers is actually equipped with different angel collision boxes ). The first disadvantage is that customers need constantly change collision boxes with different angles. It has a lot of trouble to make replacement and the collision boxes of different angles will cover a large area. The second disadvantage is that the collision boxes are not complete enough with different angles to meet customers need for subsequently adding the required impact angles.
impact window of the test bench:300*300 mm，（impact window size of the test bench is larger than the size produced by other manufacturers .the instrument procuced by our company is adjustable and fixable by the ambulant Support frame according to the different styles and size of the product）
The colliding box is constructed in a whole, and the entire hitting mechanism is in the interior of the crash box, including the test sample. Safe and reasonable design, excluding different specifications of the sample (especially the arc-shaped sample) due to lax, resulting in the impact of the media splash out.
the instrument Uses a large volume of gas storage tank of which the volume achieve to 170L. (30% larger than any domestic manufacturers, the impact of more stable pressure).
The main standard components of gravel impact tester : gun assembly, collision chamber and specimen holder.
The gravel impact tester Quickly carry out the loading and unloading of the specimen and equipped with an external type of gravel collection box .it is convenient and practical.
Display style: operating instrument for the touch screen, easy to operate at a glance. (Other home is digital or pointer type)
Working pressure range: 0 ~ 5.0 kgf / cm2 / grade 1.6 (according to the actual customer pressure to adjust the situation, up to 8.0kgf / cm2)
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