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- Technical Description Model 471
Technical Description Model 471
Technical Description Model 471
The Bend and Impact Tester, Model 471, is designed to assess the flexibility and impact resistance of coatings on light-gauge sheet metal or tube stock. It simulates operations such as punching, beading, and crimping to determine the quality of coated metal sheets.
The test involves bending a coated sheet metal panel and subjecting it to a specified impact force. This process transforms the cylindrical fold into a conical shape, allowing the determination of the bending radius at which the coating fails.
The tester comprises two vertical tubes guiding a 2300 +/- 100 g impact tool with a 650 mm +/- 5 mm drop. It includes a special-design anvil for panel placement and a 5 mm diameter rod mandrel for bending the panel.
The procedure involves bending a 50 x 140 mm coated sheet metal panel by 180° over the mandrel, with the coating facing outward. The impact tool is released after positioning the panel over the anvil.
The panel is submerged in a solution of copper sulphate, citric acid, and sulphuric acid for 5 minutes, then rinsed. Failures in the coating appear as corrosion lines or dots, which are measured from the buckling point.
The length of the corrosion line is measured in millimeters. Shorter lines indicate better coating quality.
Dimensions: Width 250 mm, Depth 170 mm, Height 850 mm. Net weight: 18 kg. Panel size: 50 x 140 mm, Thickness: 0.10 - 0.35 mm.
Order No. 0003.01.31 for the Bend and Impact Tester, Model 471, including the bending mandrel.
Catalog excerpts
testing equipment for quality management Technical Description and Operating Instructions by deformation in a sudden blow
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approx. 250 mm approx. 170 mm approx. 850 mm Panel size: Thickness: Bend and Impact Tester, Model 471Purpose and application The Bend and Impact Tester is used to measure both flexibility and impact resistance of light-gauge sheet metal, or tube stock, coatings in a single operation. The test simulates punching, beading, crimping and similar operations. A bent coated sheet metal panel is subjected to a prescribed impact force thus causing the cylindrical fold in the panel to be squeezed into a conical shape. The test permits to determine the bending radius at which failure of the coating first...
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