Bare Wire Torsion Testing Machine
The Bare Wire Torsion Testing Machine is designed to determine the ability of metal wires with a diameter (or characteristic dimension) of 1–10 mm to withstand plastic deformation during unidirectional or bidirectional torsion. It can also reveal surface and internal defects in the test specimen.
Applications
The machine can be used for various types of wire materials, including:
Steel Wires: Steel wire and other ferrous metal wires
Copper Wires: Copper wire, copper alloys, etc.
Aluminum Wires: Aluminum wire, aluminum alloys, etc.
Other Materials: Fiberglass-reinforced materials, ultra-fine fibers, alloy steel and other applicable wire materials
Standards
The Bare Wire Torsion Testing Machine is applicable to the following national and international standards:
GB/T 239.1-2012 — Metallic Materials — Wire — Part 1: Test Method for Torsion Test
GB/T 239.2-2012 — Metallic Materials — Wire — Part 2: Test Method for Reverse Torsion Test
GB/T 239-1999 — Metallic Materials — Wire — Torsion Test Method
ISO 7800:1984 — Metallic Materials — Wire — Simple Torsion Test
ISO 9649:1990 — Metallic Materials — Wire — Reverse Torsion Test
Technical Specifications
| Parameter | G-1 | G-3 | G-6 | G-10 |
|---|---|---|---|---|
| Product Model | G-1 | G-3 | G-6 | G-10 |
| Metal Wire Diameter Range | Φ0.1–1 mm | Φ0.1–3 mm | Φ1–6 mm | Φ1–10 mm |
| Gauge Length Between Chucks | 220 mm (customizable) | 330 mm (customizable) | 520 mm (customizable) | 530 mm (customizable) |
| Maximum Counting Capacity | 999.9 turns | |||
| Speed Error | <±5% | |||
| Minimum Turn Count Resolution | 0.1 turn | |||
| Speed | 0.25. 0.5. 1. 1.5. 2. 3. 5 r/s | |||
| Chuck Hardness | 55–65 HRC | |||
| Guide Rail Parallelism | <0.2 mm | |||
| Chuck Coaxiality | <Φ0.4 mm | |||
| Approx. Test Bench Weight | 60 kg | 80 kg | 200 kg | 220 kg |
| Power Supply | 220 V, 50 Hz | |||
Main Functions
1. Unidirectional Torsion Test
The specimen is uniformly rotated around its own axis in one direction until the specified number of turns is reached or the specimen fractures.
2. Bidirectional Torsion Test
The specimen is uniformly rotated around its own axis in one direction for a specified number of turns, then rotated in the opposite direction for the same number of turns or until fracture occurs.
The machine can be used to evaluate the torsional plastic deformation resistance of metal and non-metal wires and identify surface and internal defects during testing.
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