GB/T 4909.5-2009 Translated English of Chinese Standard. (GBT 4909.5-2009, GB/T4909.5-2009, GBT4909.5-2009): Test methods for bare wires - Part 5: Bend test - Reverse bend testhttps://www.chinesestandard.net, 19. okt. 2018 - 11 sider This part of GB/T 4909 specifies the test equipment, test piece preparation, measurement procedure, test results and evaluation of the reverse bend test in the bend test of bare wires. This part is applicable to the determination of reverse bend performance of the round-section conductors such as copper, aluminum and its alloys, bimetallic wires and so on which have a nominal diameter d of 0.3 mm ~ 10.0 mm as well as the specially-shaped section conductors with characteristic size less than 20.0 mm (such as contact wires). |
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ADD the requirements apply arms and levers axis of rotation bare wires bend test bending arm Cable clamping block clamping surface closest point conductor is shown conductor reverse bend connection line continuity of coating curvature centers curved cylinder curved cylinder’s axis Curved cylinder’s radius cylinders and clamping cylindrical bearing cylindrical surface diagram of reverse dimensions Distance h exceed GB/T guide block’s bottom Hardness test lever hole Lever or sleeve methods for bare Nominal diameter Normative references number of bends original position parameters Perform continuous test perpendicular piece is broken piece of specially-shaped plane point in contact relevant product standards reverse bend performance reverse bend tester round-section conductor Schematic diagram Second bending Shanghai shown in Figure Solder solution method specially-shaped section conductors specified number specimens straighten Tensile Test equipment Test for continuity Test methods test piece test results clause tester The schematic top surface Torsion Vise wires Zhang