Method of sawing stainless steel

Because of the high hardness of stainless steel and the low thermal conductivity during cutting, the cutting difficulty is much more difficult. Therefore, choosing the right saw blade and circular saw machine is the premise of reducing the cost per knife.

1. Selection of metal circular saw blades The plasticity and toughness of stainless steel are very large. The cutting of the chips during the machining process is continuous, which not only affects the smooth operation of the machine, but also smashes the processed surface and easily sticks the saw blade, so it is difficult to cut. material. In the selection of stainless steel saw blades, cobalt-containing high-performance high-speed steel saw blades coated with titanium carbonitride coating, titanium aluminide coating and titanium aluminum nitride coating are recommended. In addition, the quality of the sawtooth grinding is also one of the important factors affecting the cutting effect. Therefore, when purchasing the saw blade, remember to indicate whether it is used to cut stainless steel. In this case, it can be distinguished when the tooth is opened, and the special tooth for stainless steel can be ground. shape.

2, the choice of metal circular saw machine According to our many years of industry experience, in general, it is recommended to choose 300 or more models. The power of the machine is too small, which easily affects the service life of metal circular saws and even saw blades. Just like a child lifting a large bucket of water, it is moving, but it is very stubborn, low efficiency, and easy to get hurt.

3. Cutting speed selection Cutting speed: When machining stainless steel, the cutting speed is slightly increased, the cutting temperature will be much higher, the tool wear will be intensified, and the durability will be greatly reduced. In order to ensure reasonable tool durability, it is necessary to reduce the cutting speed, generally selected from 30% to 50% of the normal carbon steel. The cutting speed is determined by the type, cross section and toughness of the workpiece being cut. The stronger the toughness, the slower the speed. The smaller the cross section of the workpiece, the faster the speed is selected. Conversely, the larger the cross section, the slower the available speed, and the large cross section requires a large cutting pressure.

4. Choosing cutting fluid and cooling method Because the cutting processability of stainless steel is difficult, there are higher requirements for the cooling, lubrication, and cleaning performance of the cutting fluid. The commonly used cutting fluids are as follows:
(1) Mineral oil such as engine oil and spindle oil: It has good lubricating performance, but has poor cooling and permeability, and is suitable for outer round finishing vehicles.
(2) Vegetable oil: such as vegetable oil, soybean oil, etc., its lubricating performance is good, suitable for threading, reaming, tapping and other processes.
(3) Emulsion: It has good cooling and cleaning performance. It also has a certain degree of lubrication and can be used for stainless steel roughing. The cutting fluid nozzle should be aligned with the cutting zone during the cutting process, or preferably by high pressure cooling, spray cooling or the like.
(4) Sulfurized oil: A cutting oil that uses sulfur as an additive. During the cutting process, high melting point sulfide can be formed on the metal surface, and it is not easy to be destroyed at high temperature. It has good lubricating effect and has certain cooling effect, and is suitable for general turning, drilling, reaming and tapping.

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