Rebar Bending Testing Machine

A: A specialized device designed to bend steel reinforcement bars (rebars) to specified angles (e.g., 90°, 180°) or until fracture, evaluating their ductility, bending resistance, and cold-bending performance—critical for ensuring rebar can withstand construction shaping (e.g., beam-column joints) without cracking.

A: Safety shield: Steel plate around the turntable (blocks flying rebar fragments if the rebar breaks suddenly).
Over-torque protection: Stops the turntable if torque exceeds 120% of the rated value (prevents mandrel/turntable damage).
Emergency stop (E-stop): Instantly cuts power if the rebar slips or the machine malfunctions.
Clamp locking: Double-locking mechanism for the rebar fixture (avoids accidental release during bending).

A: In a Three-Point Bend Test, a supported sample is loaded at the center point and bent to a predetermined angle or until the test sample fractures. Failure is determined by the size and frequency of cracks and imperfections on the outer surface allowed by the material specification or the end user.

A: The bend test is a simple and inexpensive qualitative test that can be used to evaluate both the ductility and soundness of a material. It is often used as a quality control test for butt-welded joints, having the advantage of simplicity of both test piece and equipment.

A: Main body (steel frame, turntable): 10–15 years (high-strength steel resists bending fatigue).
Motor/reduction gear: 8–10 years (replaceable if torque decreases by >10%).
Clamps/mandrels: 3–5 years (consumables; replace when wear affects grip or angle accuracy).

A: Torque depends on rebar diameter and strength:
For Φ20mm HRB400: Required torque ≈ 150 N·m.
For Φ40mm HRB500: Required torque ≈ 800 N·m.
Standard machines have torque ranges of 0–1000 N·m (covers Φ6–Φ50mm rebars), large machines reach 0–2000 N·m (for Φ50–Φ80mm rebars).