Common materials and models for triangular knitting machines and technical requirements for mechanical processing

I. Common Materials and Models for circular Knitting Machine Triangles 1. Representative models of high-carbon and high-chromium die steel: Cr12MoV, D2 (American standard) Features: High hardness (up to HRC58-62 after quenching), excellent wear resistance, suitable for high-speed and large-scale knitting production scenarios, and is currently the mainstream material selection for circular knitting machine triangles. 2. Representative models of high-speed tool steel: W18Cr4V, W6Mo5Cr4V2. Features: Good red hardness, maintaining high hardness even under high-temperature conditions, suitable for large circular knitting machines that weave thick materials and elastic yarns. 3. Representative models of cemented carbide: YG8, YG15 (tungsten-cobalt cemented carbide). Characteristics: Extremely high hardness (HRA89-91), wear resistance far exceeds that of steel, suitable for ultra-high-speed circular knitting machines or the working conditions of weaving special fibers, but relatively high cost and poor toughness. Ii. Technical Requirements for Triangular Mechanical Processing of Knitting Circular Machines 1. Dimensional Accuracy of the shape: The dimensional tolerances of the yarn guiding working surface and installation reference surface of the triangle should be controlled within the range of ±0.01 to ±0.02mm. The triangular Angle tolerance is ≤±5 ', ensuring the precise loop trajectory of the yarn and avoiding problems such as needle skipping and yarn breakage. 2. Surface roughness: The surface roughness of the yarn guiding working surface should reach Ra0.2 to Ra0.4μm, and it needs to undergo grinding and polishing treatment to reduce the frictional resistance between the yarn and the working surface. The roughness of the non-working surface is ≤Ra3.2μm to prevent dust accumulation and yarn entanglement. 3. Heat treatment requirements: Quenching treatment must ensure uniform hardness, with an effective hardened layer depth of no less than 2mm, to prevent rapid local wear. The tempering treatment is thorough to eliminate internal stress and prevent the triangle from deforming or cracking during use. 4. The assembly reference requirements stipulate that the positional tolerance of the triangular installation holes should be ≤±0.02mm, and the verticality tolerance of the holes should be ≤0.01mm/m, to ensure the assembly accuracy with the needle bed of the circular machine and guarantee the operational stability. 5. Consistency of processing technology: During mass production, the dimensional consistency deviation of the triangles of the same model should be ≤0.03mm to ensure the synchronization of the entire machine when multiple triangles work in coordination. Knitting circular knitting machine, spray oiling machine, circular knitting machine parts