Gear shaving cutter is a kind of finishing tool for spur and helical involute cylindrical gears. When shaving, the cutting edge of the shaving cutter shaves a layer of thin metal along the tooth surface of the workpiece, which can effectively improve the accuracy and tooth surface quality of the shaved gear; Moreover, it has high machining efficiency and long tool life. It is the most widely used machining tool in batch and mass production of medium precision cylindrical gears.
There are many narrow grooves on the tooth surface to form the cutting edge, which is a gear shaped gear machining tool for machining the workpiece according to the meshing principle of helical gear. During machining, the cutter cuts beard like fine chips from the tooth surface of the gear, so it is called shaving cutter. The gear shaving cutter is used for gear hobbing After gear shaping (see gear machining), the gear teeth are finished. The commonly used disc gear shaving cutter is like a hardened helical cylindrical gear (Fig. 1). There are two forms of grooves on the tooth surface: one is that a circular ring or spiral through groove is opened on the whole gear ring, and the cross section of the groove can be rectangular or trapezoidal. This gear shaving cutter only sharpens the front after being blunt (groove part), the tooth profile and outer diameter do not change. Because the through groove cannot be made too deep, it is only applicable to the shaving cutter with modulus less than 1.75mm; the other is that the grooves on both sides are blocked and are inserted separately with comb shaper. In order to enable the shaper to retract the cutter, an inclined small hole is drilled at the tooth root of each tooth. After being blunt, the tooth profile and the cylindrical surface of the tooth top need to be reground. Shaving cutter
In order to reduce the cutting load of each tooth, the number of teeth of the shaving cutter is large, and the prime number is generally taken to avoid having a common factor with the number of teeth of the gear to be cut, otherwise the error of the shaving cutter will be copied to the gear to be machined. According to international standards, the accuracy of gear shaving cutter can be divided into Grade AA, Grade A and grade B. In actual production, the gear profile shaved by the shaving cutter with correct involute profile often deviates from the correct involute near the pitch circle of the gear and is concave inward, with a deviation of about 0.01 ~ 0.03 mm. The tooth profile deviation of spur gear is larger than that of helical gear. In order to get the correct involute tooth profile of the workpiece, the tooth profile of the shaving cutter should be corrected. In mass production, the tooth profile correction curve of the shaving cutter is determined by experimental method.
The gear shaving cutter can process the inner and outer cylindrical gears with straight and helical teeth, with high production efficiency and smooth machining surface. In addition, there is a worm gear shaving cutter for machining precision worm gear. The type and parameters of its basic worm should be the same as the working worm matched with the worm gear. Like the gear shaving cutter, it has many narrow grooves on the helical surface to form a cutting edge and contain chips. Worm gear shaving cutter is difficult to manufacture and can only be used when machining worm gears with high precision requirements.
There are many narrow grooves on the tooth surface to form the cutting edge, which is a gear shaped gear machining tool for machining the workpiece according to the meshing principle of helical gear. During machining, the cutter cuts beard like fine chips from the tooth surface of the gear, so it is called shaving cutter. The gear shaving cutter is used for gear hobbing After gear shaping (see gear machining), the gear teeth are finished. The commonly used disc gear shaving cutter is like a hardened helical cylindrical gear (Fig. 1). There are two forms of grooves on the tooth surface: one is that a circular ring or spiral through groove is opened on the whole gear ring, and the cross section of the groove can be rectangular or trapezoidal. This gear shaving cutter only sharpens the front after being blunt (groove part), the tooth profile and outer diameter do not change. Because the through groove cannot be made too deep, it is only applicable to the shaving cutter with modulus less than 1.75mm; the other is that the grooves on both sides are blocked and are inserted separately with comb shaper. In order to enable the shaper to retract the cutter, an inclined small hole is drilled at the tooth root of each tooth. After being blunt, the tooth profile and the cylindrical surface of the tooth top need to be reground. Shaving cutter
In order to reduce the cutting load of each tooth, the number of teeth of the shaving cutter is large, and the prime number is generally taken to avoid having a common factor with the number of teeth of the gear to be cut, otherwise the error of the shaving cutter will be copied to the gear to be machined. According to international standards, the accuracy of gear shaving cutter can be divided into Grade AA, Grade A and grade B. In actual production, the gear profile shaved by the shaving cutter with correct involute profile often deviates from the correct involute near the pitch circle of the gear and is concave inward, with a deviation of about 0.01 ~ 0.03 mm. The tooth profile deviation of spur gear is larger than that of helical gear. In order to get the correct involute tooth profile of the workpiece, the tooth profile of the shaving cutter should be corrected. In mass production, the tooth profile correction curve of the shaving cutter is determined by experimental method.
The gear shaving cutter can process the inner and outer cylindrical gears with straight and helical teeth, with high production efficiency and smooth machining surface. In addition, there is a worm gear shaving cutter for machining precision worm gear. The type and parameters of its basic worm should be the same as the working worm matched with the worm gear. Like the gear shaving cutter, it has many narrow grooves on the helical surface to form a cutting edge and contain chips. Worm gear shaving cutter is difficult to manufacture and can only be used when machining worm gears with high precision requirements.
