Disc Shear Blades: An Efficient Cutting Tool for Metal Processing

In the metal sheet processing industry, from the production of body stamping parts in automobile manufacturing to steel structure processing in the construction industry, disc cutting blades are the core tools for achieving efficient and precise cutting. This seemingly simple disc-shaped tool, with its unique design and high-performance materials, undertakes the important task of cutting metal sheets into specific sizes.Dingsheng is a professional manufacturer of Shear Blades. Today, we will introduce Disc Shear Blades to you.

The performance of a Disc Shear Blades depends first and foremost on its material selection. The commonly used blade materials include high-speed steel, hard alloy, and ceramic materials. High speed steel blades have good toughness and red hardness, and are not easy to break during cutting. They are suitable for cutting medium and low carbon steel plates with a thickness of less than 3mm. Their working temperature can reach 600 ℃, and the hardness is maintained between HRC63-66. Hard alloy blades are composed of hard phases such as tungsten carbide and bonding phases such as cobalt, with extremely high hardness (up to HRA89-93) and wear resistance 5-10 times that of high-speed steel. They are commonly used for cutting medium thick plates such as stainless steel and aluminum alloys with a diameter of 4-8mm. Ceramic blades, with their high hardness (HRA92 or higher) and low friction coefficient, demonstrate advantages in high-speed cutting of thin metal plates, especially suitable for precision machining with high surface quality requirements. However, due to their high brittleness, strict control of cutting parameters is required during use.

From the perspective of structural design, Disc Shear Blades generally consist of two parts: the blade body and the cutting edge. The blade body is usually disc-shaped, and the thickness depends on the thickness of the shearing plate, generally between 10-30mm. A larger thickness can ensure the rigidity and stability of the blade during high-speed rotation. The cutting edge is the key part of the blade, and its shape and angle directly affect the cutting quality. The common blade angle is between 15 ° and 30 °. A smaller blade angle can reduce shear force, but it will shorten the service life of the blade; The larger blade angle is the opposite. To improve the durability of the blades, some blades adopt coating technology, such as TiN (titanium nitride) and TiAlN (titanium aluminum nitride) coatings, to increase the surface hardness of the blades to HV2000 or above, while reducing the surface friction coefficient, minimizing tool sticking, and extending the tool life by 3-5 times.

The working principle of the disc cutting blade is based on the rolling cutting process. During operation, the upper and lower disc blades rotate in opposite directions with a certain speed difference (usually 1.1-1.3 times), and the sheet is fed between the blades under the combined action of frictional and shear forces. As the blade continues to rotate, the sheet is gradually cut off. By adjusting the overlap of the upper and lower blades (usually 0.3-0.8 times the thickness of the sheet) and the lateral clearance (0.05-0.2mm), the deformation and cross-sectional quality during the shearing process can be controlled. When cutting thinner sheets, it is necessary to reduce the overlap and lateral clearance to obtain a smooth cut; When cutting thick sheets, increase the parameters appropriately to prevent blade overload damage.

In practical application scenarios, the disc cutting blade exhibits strong adaptability. In the automotive manufacturing industry, thin steel plates used for cutting body coverings require blades with extremely high cutting accuracy, and the height of burrs on the cut should be controlled within 0.05mm to ensure the quality of subsequent stamping and forming; In the field of steel structure processing, for thick steel plates of 8-12mm, it is necessary to use large-diameter and high hardness hard alloy blades, combined with heavy-duty shearing equipment, to achieve efficient cutting. In addition, Disc Shear Blades are widely used in fields such as home appliance manufacturing and aerospace. Customized blade designs are constantly emerging according to the needs of different industries, such as wavy cutting edges for cutting anti-skid plates and serrated cutting edges for metal mesh processing.

With the continuous improvement of processing accuracy and efficiency requirements in the manufacturing industry, disc cutting blades are also developing continuously. The new blade further enhances its overall performance by optimizing its material formula and manufacturing process; Intelligent monitoring systems have begun to be applied to the use process of blades, monitoring the wear and cutting force changes of blades in real time through sensors, timely warning for replacement, reducing downtime, and improving production efficiency. As an important tool for metal processing, the disc cutting blade is constantly advancing and developing related industries through technological innovation.