German D2/20 coupling D2/20 model D2/20 price

D2/20 coupling

D2/20 coupling introduction

If there is any misalignment in the system, it will lead to premature damage of the shaft, bearings or coupling, which means that it cannot be used in high-speed environments because it cannot compensate for the relative displacement between shafts caused by high temperature generated by high-speed operation. Of course, if the relative displacement can be successfully controlled, rigid couplings can also perform very well in servo system applications. In particular, small-sized rigid couplings have the superior performance of light weight, ultra-low inertia and high sensitivity, and in practical applications, rigid couplings have the advantages of maintenance-free, super oil resistance and corrosion resistance. Although people in the past did not approve of using rigid couplings in servo drives, due to their high torque capacity, rigidity and zero-backlash performance, small-sized aluminum alloy rigid couplings are increasingly used in motion control fields.

D2/20 coupling classification

Rigid couplings are divided into flange couplings, radial key flange couplings, sleeve couplings, clamp shell couplings and parallel shaft couplings Flange coupling: a coupling that uses bolts to connect the flanges of two half couplings to achieve the connection of two shafts Radial key flange coupling: a coupling that uses radial keys and ordinary bolts to connect two half couplings Sleeve coupling: a coupling that uses a common sleeve to connect two shafts in some way Clamp shell coupling: a coupling that uses two axially split clamp shells to clamp in some way to achieve the connection of two shafts Parallel shaft coupling: a coupling that uses an intermediate disk and pin shafts to achieve the connection of two parallel shafts.

D2/20 coupling mechanical properties

The heating temperature of rigid couplings is usually 560~600℃, and the hardness requirement is HRC22~34. Because the purpose of quenching and tempering is to obtain comprehensive mechanical properties, the hardness range is relatively wide. However, if there are hardness requirements on the drawing, the tempering temperature must be adjusted according to the drawing requirements to ensure the hardness. For example, some shaft parts require high strength, so the hardness requirement is high; while some gears and shaft parts with key slots, because milling and slotting processing are required after quenching and tempering, the hardness requirement is lower. Regarding the tempering holding time, it depends on the hardness requirement and the size of the workpiece. We believe that the hardness after tempering depends on the tempering temperature and has little relationship with the tempering time, but it must be thoroughly tempered. Generally, the tempering holding time of the workpiece is more than one hour. Cr can increase the hardenability of rigid couplings, improve the strength and tempering stability of steel, and have excellent mechanical properties. For large cross-section or important quenched and tempered workpieces, Cr steel should be used. But Cr steel has the second type of temper brittleness. From the perspective of foreign development trends, new generation CNC machine tools are developing towards ultra-high speed to improve production efficiency, using new functional components (electric spindles, linear motors, etc.) to achieve ultra-high speed machining. The electric spindle and linear motor required for rigid couplings directly connect the motor and the main shaft through the expansion tightening coupling sleeve, eliminating the gearbox and other mechanisms in the middle to achieve ultra-high speed. A CNC machine tool requires at least five or six sets of couplings, and up to fifty or sixty sets of couplings. It can be seen that this is a very huge market. The German Lingsi rigid coupling industry is becoming more and more popular. Coupled with many factors such as enterprise management, we will analyze what trend the coupling industry will present in the near future.

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