Precautions for cutting high-speed steel circular saw blades
Due to the high hardness of stainless steel and its low thermal conductivity during cutting, the difficulty of cutting increases significantly. So choosing the appropriate saw blade and circular saw machine is a prerequisite for reducing the cost per blade.
1. Selection of metal circular saw blades
Stainless steel has high plasticity and toughness. During machining, the chips are continuous, which not only affects the smooth operation, but also damages the machined surface and easily adheres to the saw blade. Therefore, it is classified as a difficult to cut material. In the selection of cutting stainless steel saw blades, it is recommended to use cobalt containing high-performance high-speed steel saw blades with carbon nitride titanium coating, nitrogen aluminum oxide titanium coating, and aluminum nitride titanium coating. In addition, the quality of sawtooth grinding is also one of the important factors affecting the cutting effect. Therefore, when purchasing saw blades, remember to indicate whether they are used for cutting stainless steel. This way, when cutting teeth, they can be distinguished and special stainless steel tooth shapes can be ground.
2. Selection of Metal Circular Saw Machine
Based on our years of industry experience, it is generally recommended to choose a model of 300 or above. The low power of the machine can easily affect the service life of the metal circular saw machine and even the saw blade. Just like a child carrying a large bucket of water, it can be moved, but it is very difficult, inefficient, and prone to injury.
3. Selection of cutting speed
Cutting speed: When processing stainless steel, slightly increasing the cutting speed will result in a much higher cutting temperature, increased tool wear, and a significant decrease in durability. To ensure reasonable tool durability, it is necessary to reduce the cutting speed, which is generally selected at 30% to 50% of the cost of turning ordinary carbon steel. The cutting speed depends on the type, cross-section, and toughness of the workpiece being cut, and materials with stronger toughness should choose a slower rotational speed. The smaller the cross-section of the workpiece, the faster the selected speed. On the contrary, the larger the cross-section, the slower the available speed, and a larger cross-section requires greater cutting pressure.
4. Choose cutting fluid and cooling method
Due to the difficult machinability of stainless steel, there are higher requirements for the cooling, lubrication, and cleaning performance of cutting fluids. The commonly used cutting fluids include the following:
(1) Mineral oils such as engine oil and spindle oil: They have good lubrication performance, but poor cooling and permeability, making them suitable for cylindrical precision turning.
(2) Vegetable oil: such as vegetable oil, soybean oil, etc., have good lubrication performance and are suitable for threading, reaming, tapping and other processes.
(3) Emulsion: has good cooling and cleaning performance. It also has a certain lubricating effect and can be used for stainless steel rough turning. During the cutting process, the cutting fluid nozzle should be aligned with the cutting area, or it is better to use high-pressure cooling, spray cooling and other cooling methods.
(4) Sulfurized oil: It is a cutting oil that uses sulfur as an additive. During the cutting process, high melting point sulfides can form on the metal surface and are not easily damaged at high temperatures. They have good lubrication and a certain cooling effect, making them suitable for general turning, drilling, reaming, and tapping.
Teach you how to use saw blades correctly:
1. Different specifications and saw blades should have different uses. The angle, thickness, tooth shape, number of teeth, and hardness of the designed blade are not the same, so there should be corresponding Asahi usage for the application of saw blades.
2. The precise size and shape of the spindle and clamp of the equipment also have a significant impact on the effectiveness of use. Before installing the saw blade, it is necessary to check and adjust it. Special attention should be paid to the impact of the contact surface between the clamp and the saw blade on the clamping force, which may cause displacement and slipping. Special attention should be paid and timely troubleshooting should be carried out.
3. When using saw blades, we should always pay attention to their working condition to avoid any abnormalities. When there is vibration, noise, or material feeding on the processing surface, it is necessary to immediately stop the machine for adjustment, and repair it in a timely manner to maintain sharpness. Special attention must be paid when grinding the saw blade. The original blocking angle of the saw blade must not be changed to avoid sudden local cooling and heating of the blade. It is best to hire a professional for grinding.
4. Finally, when you do not need to use the saw blade temporarily, it should be hung vertically to avoid being placed flat for a long time. Objects should never be pressed on top of it, and the blade should be protected from being bumped or bumped randomly.
