Application: The repeated bending test machine is used to test the repeated bending performance of metal materials with a diameter of 3-8mm and to show its defects. Repeated bending machine, standard steel bar repeated bending machine
Main parameters:
Wire diameter 3.0 5.0 6.5–8
Arc radius (mm) 10 15 20
Distance (mm) 35 50 75
Rod diameter mm 3.5 and 4.5 5.57 and 9
Repeated bending machine, standard steel bar repeated bending machine
Main test steps:
1. Cut off a section of 200-250mm from the metal wire to be inspected for correction. The surface of the wire must not be damaged during straightening.
2. Select the arc radius r of the clip according to the wire diameter in the parameter table, the distance b from the top of the clip arc to the pull rod ground, the distance b from the bottom of the pull rod, and the pull rod hole. The arc radius number is printed on the top of each clip for selection. The distance b is obtained by adjusting the position of the pull rod through a single hole on the rocker arm, which is 35, 50, 75 from bottom to top. The pull rod hole &phi can be identified according to the numbers printed around the pull rod.
3. There are four mutually perpendicular holes on the main pull rod. You can get the hole position you need by adjusting the direction of the pull rod. When using the hole at one end of the thread, the shaft sleeve should be put on. When using the hole at the other end, the shaft sleeve should be removed to ensure that the wire is on the center line of the bend.
4. Place the rocker arm in a vertical position and use it as the starting state for the test. Insert the sample into the upper chuck to the top, and turn the upper chuck handle to tighten the upper end of the wire.
5. Press the clamp on the handle down 15-25 mm and hold it steady. (For thick wires, the distance should be longer so that the wire has a tensile force of about 15-25 kg). Turn the main clamp handle to clamp the lower end of the wire and bend it.
6. During the bending test, a uniform speed should be used (about 1 time/second)
7. The bending count is from returning to the starting position to bending 90 degrees to the right. The sample returns to the starting position for the first time, then bends 90 degrees to the left, and the sample returns to the starting position for the second time. This process continues until the sample breaks. The last bending after the sample breaks is not counted.
8. If there are signs of pressure marks on the arc surface of the clip after long-term use, the clip should be replaced.
9. The oil cup and the relatively lubricated areas should be greased regularly to keep them lubricated.
Installation and Commissioning: The machine should be installed at the edge of a workbench with the rotating handle extending outside the workbench. Use three M8 bolts for mounting. A 10-mm hole should be located in the base plate between the two clamps. A hole should also be drilled in the workbench to allow the wire to pass freely through. Applications and Functions: Bending Tester, Rebar Bending Tester, Repeated Bending Tester, Rebar Repeated Bending Machine. This machine is specialized for performing planar forward and reverse bending tests on rebar. Its main technical parameters and specifications meet the requirements of GB5029-85, Rebar Planar Reverse Bending Test Method.
This product is widely used in steel mills and construction companies to test the forward and reverse bending properties of rebar. This machine is a replacement for the original GW-2/25 and GW-2/40 models. By replacing accessories with different specifications, one machine can replace two, maximizing resource conservation. This equipment features a comprehensive range of functions and is easy to operate. In particular, the design of the limit stops and wearing parts is more rational, making wearing parts easily replaceable, thereby extending its service life.