1 Overview
Circular saw blades are made of metal, so they are often called metal circular saw blades. The production process requires the addition of special materials, such as ceramics, high-speed steel, tungsten carbide and titanium carbide in the cutter head.
2. Application equipment
Applied to various types of metal cutting and processing equipment, such as: circular saw machines, pipe cutting machines, aluminum cutting machines, cutting machines, etc.
3. Type
Circular saw blades are divided into many types. They are roughly called: carbide saw blades, high-speed steel saw blades, saw blade milling cutters, cold saws, stainless steel saw blades, etc.
4. Cutting material range
Low hardness carbon steel and non-ferrous metal rods and pipes and other metal materials such as: conventional iron, steel (ultra-thin steel, stainless steel, special steel, etc.), aluminum (aluminum forgings, aluminum forming parts, aluminum plates, aluminum corners and aluminum fences) , wood (for cutting wood of any size and shape), stone, etc.
5. Detailed introduction
The main materials of circular saw blades include: high-speed steel saw blades (HSS saw blades), solid carbide saw blades, tungsten steel saw blades, toothed alloy saw blades, diamond saw blades, etc.; general surface coatings include: white steel saw blades Blades (natural color), nitride saw blades (black), titanium-plated saw blades (gold), chromium nitride (color), etc.
Choice of substrate
(1) 65Mn spring steel has good elasticity and plasticity, economical material, good heat treatment hardenability, low heating temperature and easy deformation, and can be used for saw blades with low cutting requirements.
(2) Carbon tool steel contains high carbon content and high thermal conductivity, but its hardness and wear resistance drop sharply when exposed to temperatures of 200°C-250°C. It has large heat treatment deformation, poor hardenability, and is prone to cracking after long tempering time. Make economical materials for cutting tools such as T8A, T10A, T12A, etc.
(3) Compared with carbon tool steel, alloy tool steel has good heat resistance, wear resistance, and better processing performance. The heat-resistant deformation temperature is 300℃-400℃, which is suitable for manufacturing high-grade alloy circular saw blades.
(4) High-speed tool steel has good hardenability, strong hardness and rigidity, and less heat-resistant deformation. It is an ultra-high-strength steel with stable thermoplasticity and is suitable for manufacturing high-end ultra-thin saw blades.
Selection of diameter: The diameter of the saw blade is related to the sawing equipment used and the thickness of the sawed workpiece.
The diameter of the saw blade is small, and the cutting speed is relatively low; the diameter of the saw blade is high, and the requirements for the saw blade and sawing equipment are high, and the sawing efficiency is also high. The outer diameter of the saw blade should be selected according to different circular saw machine models. Use a saw blade with a consistent diameter.
The diameters of standard parts are: 110MM (4 inches), 150MM (6 inches), 180MM (7 inches), 200MM (8 inches), 230MM (9 inches), 250MM (10 inches), 300MM (12 inches), 350MM ( 14 inches), 400MM (16 inches), 450MM (18 inches), 500MM (20 inches), etc. The bottom groove saw blades of precision panel saws are mostly designed to be 120MM.
Selection of the number of teeth. Generally speaking, the more teeth there are, the more cutting edges can be cut per unit time, and the better the cutting performance. However, more cutting teeth require more carbide, and the price of the saw blade is higher, but If the saw teeth are too dense, the chip capacity between the teeth will become smaller, which can easily cause the saw blade to heat up; in addition, if there are too many saw teeth, if the feed rate is not matched properly, the amount of cutting per tooth will be very small, which will intensify the friction between the cutting edge and the workpiece, affecting the blade edge. service life. Usually the tooth spacing is 15-25mm, and a reasonable number of teeth should be selected according to the material being sawed.
Thickness Selection: Theoretically, we want the saw blade to be as thin as possible. The saw kerf is actually a kind of consumption. The material of the alloy saw blade base and the process of manufacturing the saw blade determine the thickness of the saw blade. If the thickness is too thin, the saw blade will easily shake during operation, affecting the cutting effect. When choosing the thickness of the saw blade, you should consider the stability of the saw blade and the material being cut. Some materials for special purposes also require specific thicknesses and should be used according to equipment requirements, such as grooving saw blades, scribing saw blades, etc.
Selection of tooth shapes Commonly used tooth shapes include left and right teeth (alternating teeth), flat teeth, trapezoidal teeth (high and low teeth), inverted trapezoidal teeth (inverted conical teeth), dovetail teeth (hump teeth), and rare ones. Industrial grade three left and one right, left and right flat teeth, etc.