High-precision rotary shear blades

Rotary shear blades are a core consumable in the steel coil slitting industry, and their manufacturing quality directly impacts cutting accuracy, speed, and service life. Many customers understand the blade material but are unaware of the complete process from raw steel to the finished product. Today, we'll take you inside the factory to see how a high-quality rotary shear blade is made.   I. Material Selection: High-Quality Steel is Key   Rotary shear blades commonly use high-grade tool steel, such as:   Cr12MoV   D2 (SKD11)   H13   High-speed steel M2, M35   Powder high-speed steel (according to customer requirements)   The raw materials must possess: ✔ High hardness ✔ Good wear resistance ✔ Impact resistance ✔ Uniform microstructure   Only by controlling quality from the source can the blades have a stable processing foundation.   II. Forging/Cutting: Processing Steel into Blanks   Depending on the blade diameter, thickness, and assembly dimensions, the steel needs to undergo:   Furnace heating   Forging   Sawing, flame cutting, or wire cutting   The purpose is to: ✨ Improve microstructure ✨ Increase density and toughness ✨ Prepare for subsequent precision machining   High-standard blanks mean the blades are less prone to cracking and more wear-resistant.   III. Precision Machining: Forming the Final Blade Dimensions   The blanks enter the CNC machining workshop and are completed through multiple processes:   CNC turning   External cylindrical grinding   Internal hole grinding   Edge grinding and finishing   Precision machining requires extremely high standards, especially for: 🟩 Edge angle 🟩 Parallelism 🟩 Concentricity 🟩 Surface finish   This step determines whether the blade can maintain stable cutting in high-speed equipment.   IV. Heat Treatment: Enhancing Hardness and Service Life   Heat treatment is the soul of rotary shear blade manufacturing. Including:   Vacuum quenching   Tempering   Deep cryogenic treatment (optional)   Through precise temperature control, the blades achieve: 🚩 Uniform hardness 🚩 Stronger wear resistance 🚩 Higher resistance to chipping   Too low hardness results in poor durability, while too high hardness leads to chipping, so heat treatment must be precise.   V. Precision Grinding and Polishing: Ensuring Cutting Quality   After heat treatment, the blades are processed again due to micro-deformation:   Precision grinding of end faces and inner holes   Edge polishing   Dimensional inspection of each piece   Finally, achieving an almost mirror-like finish, ensuring that the blade remains sharp and stable even at high rotational speeds. VI. Inspection and Packaging: Controlling the Quality of Every Blade   Each blade undergoes a thorough inspection:   ✔ Hardness ✔ Concentricity ✔ Outer diameter and inner bore dimensions ✔ Blade edge precision ✔ Surface defect inspection   After passing inspection, the blades are coated with anti-rust oil, packaged, and marked with specifications and batch numbers for traceability.   Conclusion: Quality Comes from Details, Longevity Comes from Craftsmanship   Rotary shear blades may seem simple, but they involve dozens of processing steps.   We consistently adhere to: 🔧 Carefully selected steel materials 🧊 Professional heat treatment 🎯 Precision machining 🛡 Strict quality control   All to ensure our customers receive blades with longer lifespan, less downtime, and higher efficiency.   If you require custom specifications, special materials, or technical guidance, please feel free to contact us. We will provide professional solutions for your production line. Company Website: https://www.mingbaiblade.com   Whatsapp: +86-13855519988