Design of Straight Teeth Bevel Gear Milling Machine
Preface
Straight teeth bevel gear milling machines are used in a variety of industries, such as automotive, machine tool, aerospace and other heavy machinery, to produce precision gears. With the development of cutting-edge technology, the demand for precision gears is also increasing. This article focuses on the design of straight teeth bevel gear milling machines, and the parameters of the machine.
Construction
Straight teeth bevel gear milling machines are constructed to machine precision gears with accuracy. The outer dimensions of the machine are typically larger to accommodate the larger bevel gear cutting tools. The larger cutting tools require more rigidity and therefore the body of the machine is constructed from heavy cast iron for strength.
The main component of the machine is the spindle. This component is made from hardened steel and has a length of approximately 1000 mm and a diameter of approximately 300 mm. The spindle rotates between two counter-rotating heads. The spindle is driven by a belt-driven motor with a maximum power of 10 kW.
The two heads are connected to the spindle via a pair of spindles collars. These collars are placed in two separate positions to accurately control the angle of the two heads. The two heads are connected by a pair of hardened steel bevel gears that have 42 teeth. These gears have an accuracy of 0.001 mm. The two heads rotate in opposite directions and can both be engaged or disengaged simultaneously to adjust the angle of the cutting tool.
The cutting tool is typically made from carbide or high-speed steel and is mounted on the spindle. The tool has a diameter of approximately 40 mm and can be adjusted to the desired accuracy. The cutting speed can reach up to 9000 rpm.
Machine Parameters
Straight teeth bevel gear milling machines have specific parameters that must be met in order to machine precision gears. These parameters include spindle speed, feed rate, cutting depth, material hardness, accuracy, and tool selection.
The spindle speed is typically between 600 and 6000 rpm. This is typically set by the operator. The feed rate is the speed at which the cutting tool moves across the material being machined. This is usually between 0.5 and 3.5 mm per second. The cutting depth is the distance that the cutting tool can reach. This is usually between 0.1 and 1 mm.
The material hardness is important because it determines the type of cutting tool needed. Generally, softer materials require less powerful tools such as carbide tools, while harder materials require stronger tools such as high-speed steel tools.
Accuracy is very important in the bevel gear milling process. This accuracy is measured in terms of the number of teeth and the distance between teeth. The higher the accuracy, the more precise the gear will be.
The last parameter is tool selection. It is important to select the right tool for the job. Some tools are specifically designed for certain applications, while others are more general purpose tools. The selection should depend on the material being machined and the desired accuracy.
Conclusion
Straight teeth bevel gear milling machines are designed to produce precision gears with accuracy. The construction of the machine is very important, as it must be rigid enough to handle the cutting tool and to maintain accuracy. The machine also has specific parameters that must be met in order to machine precise gears. These parameters include spindle speed, feed rate, cutting depth, tool selection, material hardness and accuracy. By ensuring that all of these parameters are met, the machine will produce precise gears with accuracy.
