Packaging & Delivery

Motor Rotor Brazing Machine: The precision core equipment for welding motor rotors

In the field of Motor manufacturing, the Rotor, as a core component, its welding quality directly determines the operating efficiency and service life of the motor. The Motor Rotor Brazing Machine, with the precise characteristics of the brazing process, has become a key equipment for the connection of components such as rotor bars and end rings. It can achieve high-strength connection of dissimilar materials, ensuring the electrical conductivity and mechanical properties of the rotor. At the same time, it forms a coordinated system with other welding machines to meet the complex manufacturing requirements of motor rotors.

As the core equipment for the industrial production of motors, the Motor Rotor Brazing Machine redefines the welding standards of rotors with its precise control of the high-temperature brazing process. The guide bars of the motor rotor are mostly made of copper, and the end rings are made of brass or red copper. The connection of dissimilar materials requires precise control of temperature and holding time. This equipment uses high-frequency induction heating or flame heating to uniformly melt the brazing filler metal within the range of 600-900℃, forming a dense brazing seam. The joint strength can reach more than 80% of the base material. It fully meets the centrifugal force requirements when the rotor rotates at high speed.

Compared with the Friction Welding Machine's connection method that generates heat through friction, the Motor Rotor Brazing Machine has more advantages when dealing with thin-walled components of rotors. Friction welding machines are suitable for butt welding of thick-walled shaft components. However, the rotor guide bars are thin and densely arranged, and the stress generated by friction can easily cause deformation or breakage of the guide bars. The brazing machine achieves connection through local heating, with a small heat-affected zone. It can precisely protect the magnetic properties of the rotor core, prevent magnetic attenuation caused by overheating, and ensure the energy efficiency indicators of the motor.

Spot Welding machines are mostly used for fixing the accessories of Motor housings, while motor Rotor Brazing machines focus on the conductive connections inside the rotors. The connection between the rotor bars and the end rings requires a low-resistance conductive path. The melt nuclei formed by spot welding are prone to sudden resistance changes, which can affect the performance of the motor. The continuous weld seam formed by brazing has uniform resistance, which can reduce current loss and increase motor efficiency by 3% to 5%. This is a core advantage that spot welding cannot replace.

When dealing with the Butt connection of the Rotor shaft and the end ring, the Butt Welding Machine can complete the basic connection. However, in the welding of dissimilar materials (steel and copper) between the shaft and the end ring, the Motor Rotor Brazing Machine is more adaptable. When welding dissimilar materials, butt welding machines are prone to generating brittle compounds. However, brazing machines can effectively suppress the formation of brittle phases through the transition effect of brazing filler metals. The impact toughness of the joint is increased by more than 40% compared to butt welding, and it can better withstand the torque impact during motor startup.

The Seam Welding Machine is good at forming continuous sealed welds and is mostly used for sealing Motor housings, while the Motor Rotor Brazing Machine focuses on the conduction and structural connection of rotors. In the fixation of rotor laminates, brazing can achieve a firm connection between the laminates through local heating, which not only ensures the integrity of the rotor but also does not affect the insulation performance between the laminates, forming a dual guarantee of "internal conductivity + external protection" when sealed with the shell of the seam welding machine.

The Laser Welding Machine for Steel Ring is suitable for welding steel rings at Motor bearing positions and can achieve high-precision annular connections, while the Motor Rotor Brazing Machine has more efficiency advantages in simultaneous welding of multiple components of the rotor. A Laser Welding Machine can only handle a single seam at a time, while a brazing machine can complete the connection of multiple guide bars and end rings simultaneously through tooling design. The welding time of a single rotor is shortened to one-third of that of traditional laser welding, making it more suitable for mass production.

Stud Welding Machine is mainly used for stud fixation of Motor bases and forms a complementary process with Motor Rotor Brazing Machine. In the motor assembly, the stud welding machine is responsible for fixing the installation studs on the base to ensure the installation stability of the motor. The brazing machine, on the other hand, completes the core connection of the rotor. The two work in collaboration, ensuring both the structural stability of the motor and its electrical performance meeting the standards, jointly enhancing the overall quality of the motor.

To sum up, Motor Rotor Brazing Machine demonstrates irreplaceable professional advantages in motor manufacturing by precisely adapting the materials and structures of motor rotors. It works in coordination with various welding machines, covering multiple links such as rotor welding, shell sealing, and accessory fixation, providing a solid guarantee for the mass production of high-efficiency motors and becoming a key equipment for technological upgrading in the motor manufacturing industry.