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Ceramic CBN Crankshaft Grinding Wheel
A ceramic CBN crankshaft grinding wheel is a superhard grinding tool specifically designed for precision grinding of automotive engine crankshafts. Its core abrasive is cubic boron nitride (CBN), with a ceramic bonding agent. This type of wheel, thanks to the high hardness, high wear resistance, and excellent thermal stability of CBN, is particularly suitable for high-precision, high-efficiency machining of crankshaft main journals, connecting rod journals, and other parts.
Key Features and Advantages
High Hardness and Wear Resistance: CBN’s hardness is second only to diamond, maintaining abrasive grain sharpness for extended periods. The wheel’s lifespan is hundreds of times longer than ordinary corundum grinding wheels, significantly reducing the frequency of replacement and dressing.<sup>1</sup>
Excellent Heat Resistance: It can withstand high temperatures of 1250-1350°C, minimizing chip adhesion and burns when grinding hardened steel and other materials, effectively controlling workpiece thermal deformation.<sup>1</sup> Excellent machining quality: The grinding process is stable, achieving high dimensional accuracy (up to 0.01mm) and low surface roughness. Workpiece surfaces are less prone to cracking, with low residual stress, improving workpiece fatigue strength.<sup>12</sup>
High efficiency and economy: Grinding efficiency is 2-3 times higher than traditional grinding wheels, resulting in significant overall economic benefits, especially suitable for mass automated production.
Machining characteristics:
1. High grinding efficiency:
2. High wear resistance: The grinding wheel has high wear resistance and low abrasive consumption, especially noticeable when grinding hard and brittle workpieces.
3. Low grinding force and low grinding temperature.
4. High workpiece accuracy, good surface quality, and good shape retention.
Applicable grinding materials: Cast iron: chilled cast iron, ductile cast iron, gray cast iron, alloy cast iron, etc.
Cast iron: 20Cr, GCr15, 45 steel, 55 steel, 42CrMo, 18CrNi8, 20CrMo, 80B high carbon steel, etc.
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