Shearing Machine

How to Choose The Right Shear Blade

shear blade

Estimated reading time: 9 minutes

Little Knowledge of Shear Blade

The shear blade is a cutting blade installed on the shearing machine. Referring to the model of the shearing machine, it can be divided into pedal shearing machine blade, mechanical shearing machine blade, and hydraulic shearing machine blade (can be divided into hydraulic swing shearing machine blade, hydraulic guillotine shearing machine blade, CNC shearing machine blade). According to the length of the blade, it is divided into the integral shear blade and segment shear blade. According to the shape of the knife-edge, it can be divided into flat cutting machine blades and oblique cutting machine blades.

shear blade
shear blade

The common metal plates of the shearing machine are aluminum plate, iron plate, ordinary carbon steel plate, galvanized steel plate, stainless steel plate, and manganese plate.

For ordinary carbon steel plates, the material of 5WSiCr can be selected for cutting less than 6mm. The tensile strength of the materials listed above is less than or equal to the tensile strength of Q235 series carbon steel plates, such as aluminum plate, iron plate, galvanized plate, and shear. You can choose 5WsiCr material for cutting below 6mm. 9CrSi can be selected for aluminum, iron, galvanized, and carbon steel plates larger than 6mm and smaller than 16mm, and 6CrW2Si or Cr12MoV can be selected for plates larger than 16mm, including stainless steel plates and manganese plates with relatively high tensile strength.

In addition to the common metal plates listed above, if you need to cut some unusual plates, you must choose the corresponding blade material according to the characteristics of the plate when selecting the material. In short, we must follow a principle, that is, it is not necessary to choose the best, but we must match the most suitable according to the characteristics of all aspects of the board.

For example, when cutting high-strength spring steel, some people will recommend using the material of front steel. Although the material of front steel is good, it is not suitable for cutting spring steel. Although the material of front steel is hard, it is also very brittle. Cutting too hard spring steel may cause cracks. However, the material DC53, which is slightly inferior to the front steel, is very suitable for cutting spring steel, because DC53 is characterized by being hard, but not brittle, and has great toughness. , So although it is not so fast and fluent when cutting spring steel, it is also easy to do.

In addition, a certain amount of work must be done in the maintenance of the shear blades. When the shearing machine stop working, the knife edge should be coated with oil to prevent rust. When cutting plates of different thicknesses, the gap between the blades should be adjusted reasonably. The blade must be closely attached to the blade holder so that the upper and lower blades are parallel, so always check whether the fastening bolts of the blade are loose.

shearing machine
shearing machine

Precautions for Choosing Shear Blade

It has a history of several years in the history of the industry. Nowadays, the shearing machine has become common equipment in the machinery industry. However, in actual work, the purchasing departments of various companies often do not know how to choose a good and suitable shear blade. It is believed that the better the material, the better the use of the shear blade.

shear blade
shear blade

In fact, the material used for the shearing machine blade depends on the plate cut by the shearing machine: T 10, Cr5Mo, 9CrSi shearing blades are suitable for cutting ordinary A3 ordinary low-carbon cold-rolled plates and scraps. Recycling shear, this feature is low cost, the product price is reasonable.

9CrSi shear blade is also suitable for cutting some harder thin plates, such as stainless steel plates. 6Crw2si, Cr12MoV shear blades are suitable for shearing hot-rolled plates, stainless steel, and medium-thick plates. 4Cr5MoSiV1(H13K), 7Cr7Mo2V2Si9(LD), W6Mo5Cr4V2(6542), and other shear blades are suitable for high-speed and high-temperature thermal cutting. The material features are high-temperature resistance, not easy to anneal, and a necessary blade for thermal shearing.

Stainless steel shearing machine blade is an important part of the shearing machine used to cut various metal materials. Its material and processing determine the use effect of the blade, and determine the service life and cutting effect of the shearing machine blade. Material selection, processing, and heat treatment determine the hardness and sharpness of the blade. Therefore, high-quality machine tools equipped with high-quality blades can greatly improve production efficiency, reduce labor, and improve the quality of the shearing machine.

The blades have been strictly selected materials, carefully processed, high-standard heat treatment, meticulous iron grinding, and strict inspections to ensure the quality of each blade. The materials of the blade are: T8, T10, 9CrSi, 6CrW2Si, Cr12MoV, SKD-11, W6Mo5Cr4v2, H11, H13, etc. The shearing machine manufacturer’s blades have been strictly selected, carefully processed, high-standard heat treatment, meticulous iron grinding, and strict inspection to ensure the quality of each blade. Products are widely used in the light industry, aviation, shipbuilding, metallurgy, instrumentation, electrical appliances, stainless steel products, steel structure construction, and decoration industries.

shear blade
shear blade

Material Selection of Shear Blade

  • T10 material shear blade, one of the most common carbon tool steels for stainless steel plate hydraulic shearing machine, with moderate toughness and low production cost. After quenching, the hardness can reach 60HRC or more, but its steel has a low hardenability and heat resistance. Poor sex. This material is widely used in shears blades and is suitable for cutting ordinary iron plates and plates with lower hardness.
  • 9CrSi material shear blade, room temperature hardness reaches 67~69HRC, 600-degree hardness reaches 54~55HRC, shear performance is equivalent to T8 high-speed steel, use performance is better than T8, the price is slightly higher, it is allowed when making shearing knives The cutting speed is 1.67m/s. Because of the large amount of Cr, its manufacturing and processing are more complicated, and the overheating sensitivity is strong, and the oxidation decarburization is relatively large. The heat treatment range must be mastered when using it.
shear blade
shear blade
  • 6CrW2Si material shear blade, its the price is higher than 9CrSi. The addition of W to high-speed steel can improve the material’s thermal stability, room temperature, and high-temperature hardness and oxidation resistance, and can cut domestic and imported stainless steel.
  • Cr12MoV material shear blade, it has lower carbon content than Cr12 steel. With the addition of appropriate amounts of Mo and V, the unevenness of carbides is improved. Mo can reduce carbide segregation and improve hardenability, and V can refine grains and increase Toughness and wear resistance, Cr12MoV steel has high hardenability, the cross-section can be completely hardened below 400mm, and it can still maintain good hardness and wear resistance at 300-400℃. Compared with Cr12 steel, it has higher toughness and volume during quenching. With a small change, high wear resistance, and good comprehensive mechanical properties, it is suitable for manufacturing all kinds of tools and molds with a heavier load and higher working temperature.
  • H13 material shear blade, H13 (4Cr5MoSiV1) is the American steel grade H13. It has high thermal strength and thermal hardness. It has good toughness, thermal fatigue performance, and certain wear resistance under medium temperature conditions, so the price is high, suitable for manufacturing all kinds of tools for punching, rolling, and slitting of medium and thick plates. When cutting 5-15mm stainless steel or 5-25 ordinary plates and low-alloy plates, the effect is significantly better than other materials such as 6CrW2Si. A material with a wide range of applications.
shear blade
shear blade

Shear Blade Maintenance Regulations

Only good maintenance of the shear blade can make it have a long life and make it more comfortable for users. The shear blade is a kind of forging machinery, and its main function is the metal processing industry. Let’s talk about the maintenance method of the shear blade.

shearing machine
shearing machine
  • Operate strictly in accordance with the operating procedures.
  • Add lubricating oil at a fixed time, fixed point, and quantitatively according to the requirements of the lubrication chart each time before starting the machine. The oil should be clean and free of precipitation.
  • The shear blade must be kept clean at all times, and the unpainted parts must be rust-proof grease.
  • The lubricating oil in the motor bearing should be regularly replaced and refilled, and the electrical part should be regularly checked for normal, safe, and reliable operation.
shearing machine
shearing machine
  • Regularly check whether the triangle belt, handle, knob, and button of the shearing machine blade are damaged. If the shearing machine blade is severely worn, it should be replaced in time, and the spare parts should be reported for the supplement.
  • Regularly check and repair switches, insurances, and handles to ensure that they work reliably.
  • Lubricate and scrub the machine tool 10 minutes before leaving get off work every day.
  • It is strictly forbidden for non-designated personnel to operate the equipment, and it is necessary to leave the machine to stop.
  • Reasonably choose the shearing gap according to the thickness of the board to avoid excessive shearing of the thick board, and adjust the gap between the upper and lower blades regularly.
  • The board should not be stained with impurities and hard objects, and avoid cutting and welding old boards.
shear blade
shear blade

Related Posts

One thought on “How to Choose The Right Shear Blade

  1. Alan says:

    I want to order a guillotine shearing machine, can you recommend?

Leave a Reply

Your email address will not be published.