In order to provide our customers with a quality product, regular qualification testing is the cornerstone to holding ourselves to the highest of standards. A qualification test was created to describe inspection and test plans, which will be used for acceptance of parts and products. The test equipment and test procedure will be explained for each separate part. All tests: dimensional, visual, and mechanical, have minimum or maximum allowable values in order to create a consistent product. When applicable, our products are tested to the ASTM standards.
The HandlesThe handles will undergo flexural loading while the wheelbarrow is in use, so the ASTM D790 3 Point Flex Test was preformed. Due to how long the part is, a special fixture was needed. COMTEC was gracious to provide Sir Hauls-A-Lot with a fixture to test shovel handles. The span of the fixture was adjusted to appropriately match the real world conditions the handles would experience. The part was then placed under flexural loading in the Instron, and taken to part failure. The part had to withstand at least 300 lbs, but it was able to hold 519.5 lbs. The part failed in compression, as was to be expected. Complete failure of the part was not achieved, because the handle began to slip on the two ends.
The Bucket SupportThe bucket support will also undergo flexural loading while the wheelbarrow is in use, so once again the ASTM D790 3 Point Flex Test was applied. Due to the unique shape of the part, a special fixture was needed. In lieu of more traditional fixtures, large I-Beams were used to act as the end supports for the testing. It is worthy to note that the bucket support was too wide for the intron, and had to be forcefully inserted. The part was then placed under flexural loading in the Instron, and taken to part failure. The part had to withstand at least 300 lbs, and was tested up to this loading. The part was not taken to failure, due to the strong desire of non-destructive testing of the complex part.
The Caster SupportThe caster support will undergo compressive loading while in usage, so the ASTM D6641 Compression Test was applied. Due to the angle on the top of the part, a triangular shaped fixture was constructed in order to give the compression load a flat surface to push down on. This fixture will be bolted to the part during testing, which will simulate the loading that the part will experience when it is bolted to the wheelbarrow holder. The part was then placed under compression loading in the Instron, and taken to part failure. The part had to withstand at least 300 lbs, but it was able to hold 410 lbs. The part failed where the two halves of the I-Beam was connected with the 5-Minute Epoxy, the carbon fiber structures were not damaged and the bolts did not shear through the fixture.
Additionally, all parts undergo stringent visual inspection before they can be considered for usage. These visual inspections include, but are not limited to identifying: Resin Starved Areas, Resin Rich Areas, Foreign Object or Debris, Fiber Alignment, and Scratches.
For a deeper understanding of testing that Sir Hauls-A-Lot preforms, please view the Qualification Test Report.