The Production Process Of Band Saw Blade

1 Cutting edge using a fixed shape carbide blade, the cold rolled alloy steel strip is cut into a plane as the welding surface, in order to facilitate the subsequent welding process, the other side is cut into an arc shape as the back bottom. For certain specifications of cold-rolled alloy steel strips need to be cut to a fixed width
2 Electron beam welding adopts advanced imported equipment, using accelerated and focused electron beams to bombard the contact surface of high-speed steel wire placed in vacuum and cold-rolled alloy steel strip after edging. When the electron beam hits the workpiece, the kinetic energy is converted into the required heat energy to weld the contact surface together, which is a high energy density bimetallic band saw blade welding technology
3 Laser welding using advanced imported equipment, the use of high energy density laser beam as a heat source for welding an efficient and precise welding method, can replace the electron beam welding bimetal composite steel strip
4 Spherodizing annealing The welded composite steel strip is placed in a well type annealing furnace or bell type annealing furnace, and a suitable annealing process is used to make the carbide in the tooth, back and weld into a ball shape for subsequent cold working
Weld flattening A process in which annealed composite steel strips are rolled to a certain thickness by a rolling mill and the position of the weld is leveled
6 Leveling and straightening using advanced imported equipment, the composite steel strip through dozens of small rolls to make the composite steel strip straight a process
7 Milling teeth Using advanced imported equipment and high-quality steel milling cutter, the high-speed steel side of the composite steel strip is a process of milling serrated shape
8 split teeth A process in which the bimetal saw blade of the tooth type is milled out and the serration is tipped to the left and right according to a certain law
9 Quenching - tempering The use of independent intellectual property rights of the quenching - tempering integrated production line, the saw blade after the tooth is kept at a temperature below the melting point for a period of time, and then quickly cooled to achieve the purpose of quenching. Then, after several heat preservation at a certain temperature, the purpose of tempering is achieved, so that the bimetal band saw blade forms a suitable organization for sawing
10 Sand blasting using fine quartz sand, high-speed impact quenching-tempering bimetallic band saw blade surface, remove surface decarbonization, oxidation and other defects, and form residual compressive stress on the surface, in order to improve the fatigue life of bimetallic band saw blade
11 Spray on the surface of the bimetal band saw blade after sand blasting with the blade specification, serial number, brand information and apply anti-rust oil
The bimetal band saw blade formed into a disk is cut to a certain length, and then the two sides of each saw blade are welded together, and the welding joint is annealed and sandblasted, and finally a circle of saw blade is formed, which is called the root band. This root band can be immediately installed on the sawing machine for use
13 Rewind To make the blade tip in the desired direction, rewind the disk blade in reverse on the rewind machine
14 Front tooth grinding The cutting surface of the teeth through a rough grinding and a fine grinding, so that the front end is highly smooth (Ra0.8), which can prevent the adhesion of iron filings caused by fire
15 Starting from the back Angle, the cutting edge is ground into various shapes of teeth with different levels and different sizes of rounded corners on both sides, so that the teeth can reasonably distribute the cutting force during the cutting process and optimize the cutting performance
16 Oil At the same time, the surface of the bimetal band saw blade is coated with a layer of anti-rust oil to prevent the band saw blade from rusting during transportation and storage
17 Cleaning There are two cleaning processes in total. Before welding, the main purpose is to clean the impurities of the welding surface to prevent the formation of defects such as inclusions and pores in the weld during welding. Before quenching and tempering, the main purpose is to clean the impurities and oil on the surface of the bimetallic band saw blade to prevent the formation of oxidation, bright spots and surface defects on the surface of the band saw blade during quenching
18 Tape packing The tape saw blade that has gone through all the processes is protected by an inlay tape at the tooth tip and then placed in the packing box