German Lanico-Maschinenbau shaft Lanico-Maschinenbau model Lanico-Maschinenbau price

Lanico-Maschinenbau shafts are used to support rotating components, bearing only bending moments without transmitting torque. Some mandrels rotate, such as the axles of railway vehicles, while others do not rotate, such as the shafts supporting pulleys. Depending on whether the shaft rotates during operation, mandrels can be divided into rotating mandrels and fixed mandrels. Rotating mandrel: The shaft is subjected to a bending moment during operation and rotates; Fixed mandrel: The shaft is subjected to a bending moment during operation and remains stationary. Based on the function of the shaft and the loads it bears, shafts can be classified into mandrels, rotating shafts, and transmission shafts: among them, mandrels only bear bending moments without transmitting torque; rotating shafts bear both bending moments and transmit torque; transmission shafts only transmit torque without bearing bending moments, or bear very small bending moments.

Lanico-Maschinenbau shaft classification and structure

Commonly used mandrels include: 1) Small taper mandrels, which offer higher positioning accuracy. However, loading and unloading workpieces with small taper mandrels is inconvenient, and axial positioning is not possible, so they are only suitable for workpieces with small batch sizes, high precision requirements, and no axial positioning requirements; 2) Step mandrels tightened with nuts, suitable for clamping multiple workpieces and applications where workpiece precision requirements are not high; 3) Expanding mandrels, which are convenient for loading and unloading workpieces and offer high precision, making them suitable for sleeve-type parts with large bore diameter tolerances. Mandrels include cylindrical, conical, elliptical ball head, inner hole, and internal thread types. In CNC turning operations, the structural shape formed by part turning is not complex, but the dimensional accuracy of the parts, especially the geometric accuracy, is required to be very high, with strict dimensional tolerances and surface roughness values for multiple diameters.

Lanico-Maschinenbau shaft control

Shafts typically adopt variable frequency speed regulation methods. There are mainly three control methods: ordinary variable frequency drive and control, vector control drive and control, and direct torque control. Ordinary variable frequency is scalar drive and control, characterized by constant torque drive, with output power proportional to speed. The dynamic performance of ordinary variable frequency control is not ideal, with poor control performance at low speeds, unstable output power, and it does not possess C shaft functionality. However, it is inexpensive and has a simple structure, generally used in grinding machines and ordinary high-speed milling machines. Vector control technology mimics the control of DC motors, using rotor field orientation and vector transformation methods to achieve drive and control, offering good dynamic performance. Vector control drives have a large torque value at startup, and combined with the simple structure and low inertia of the electric spindle itself, they achieve high starting acceleration, allowing instantaneous attainment of the allowable limit speed after startup. These drives come in open-loop and closed-loop types; the latter can achieve position and speed feedback, not only offering better dynamic performance but also enabling C shaft functionality; the former has slightly poorer dynamic performance and does not possess C shaft functionality, but is cheaper. Direct torque control is another new type of high-performance AC speed regulation technology developed after vector control technology. Its control concept is novel, and the system structure is concise and clear, making it more suitable for driving high-speed electric spindles and better meeting the dynamic and static characteristic requirements of high-speed electric spindles, such as high speed, wide speed regulation range, and high-speed instant precise stopping. It has become a hot technology in the field of AC drives.

Lanico-Maschinenbau shaft structure

The structural design of a shaft involves determining its reasonable shape and all structural dimensions, which is an important step in shaft design. It depends on factors such as the type, size, and position of parts installed on the shaft, the method of fixing the parts, the nature, direction, magnitude, and distribution of loads, the type and size of bearings, the blank material of the shaft, manufacturing and assembly processes, installation and transportation, and deformation of the shaft. Designers can design according to specific requirements of the shaft, and if necessary, compare several options to select the optimal design solution. Below are general principles for shaft structural design: 1, save materials, reduce weight, and adopt shapes with uniform strength or large section modulus; 2, facilitate precise positioning, stability, assembly, disassembly, and adjustment of parts on the shaft; 3, adopt various measures to reduce stress concentration and improve strength; 4, ensure ease of machining and maintain precision.

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