The material hardness of the wire drawing wheel directly affects the fineness of the metal surface texture, processing efficiency, and equipment wear and tear.

When adjusting, it is necessary to comprehensively match based on the processing material, target surface effect, and equipment performance.

The following are the key adjustment strategies: 1 Matching material hardness with processing scenarios, high hardness wheels (Shore hardness 80-95A) are suitable for rough drawing (Ra 3.2-6.3 μ m) of hard metals such as stainless steel and titanium alloys, or for working conditions that require rapid removal of oxide layers and welding scars.

Advantages: Strong cutting force, high wear resistance, but requires high pressure (15-20N/cm ²) to avoid slipping.

Suitable scenarios for medium hardness wheels (Shore hardness 60-75A): precision drawing (Ra 0.8-1.6 μ m) of soft metals such as aluminum alloys and brass, or complex surface machining.

Advantages: Moderate elasticity, can reduce surface scratches, recommended pressure of 8-12N/cm ².

Soft wheels (Shore hardness 40-55A) are suitable for mirror drawing pretreatment (Ra below 0.4 μ m) or processing of ultra-thin plates (thickness<0.5mm).

Advantages: High adhesion, avoiding material deformation, requiring low-speed (5-10m/min) operation.

‌2.

Dynamic hardness adjustment technology temperature compensation method: By using the built-in temperature control module of the equipment, the working temperature of the wire drawing wheel is stabilized at 25-40 ℃.

For example, when the nylon wheel is heated to 35 ℃, its hardness decreases by about 10%, which can be temporarily adapted for soft metal processing.

Composite wheel layered design: adopting a "hard core+soft surface" structure (such as polyurethane wrapped steel core), adjusting the pressure to deform the surface by 5-15%, indirectly changing the effective contact hardness, and adapting to multi material mixed line production.

Sand belt/wire drawing wheel combination process: After rough machining with hard wheels, switch to soft wheels and overlay # 800 mesh or more sand belts for precision repair, which can achieve a "soft landing" of hardness without replacing the wheel body.

‌3.

Parameter linkage optimization pressure hardness formula: The relationship between hardness (H) and theoretical pressure (P) is: