German formsprag coupling formsprag model formsprag price

formsprag coupling is a widely used coupling, also known as a jaw coupling, consisting of two metal jaw hubs and an elastomer. The two metal jaw hubs are generally made of 45 steel, but aluminum alloy is also used when load sensitivity is required.

formsprag coupling introduction

If there is any misalignment in the system, it will lead to premature damage to the shaft, bearings, or coupling, which means it cannot be used in high-speed environments because it cannot compensate for the relative shaft displacement caused by high temperatures generated during high-speed operation. Of course, if the relative displacement can be successfully controlled, rigid couplings can also perform excellently in servo system applications. In particular, small-sized rigid couplings have superior performance such as light weight, ultra-low inertia, and high sensitivity. In practical applications, rigid couplings have the advantages of being maintenance-free, highly oil-resistant, and corrosion-resistant. Although people in the past did not favor 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 being used in motion control fields.

formsprag 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 shaft connection. Radial key flange coupling: A coupling that uses radial keys and standard bolts to connect two half-couplings. Sleeve coupling: A coupling that uses a common sleeve to connect two shafts in some manner. Clamp shell coupling: A coupling that uses two axially split clamp shells to clamp and achieve shaft connection in some manner. Parallel shaft coupling: A coupling that uses an intermediate disc and pin shafts to achieve connection between two parallel shafts.

formsprag coupling mechanical properties

The heating temperature for rigid couplings is usually 560~600℃, and the hardness requirement is HRC22~34. Since the purpose of quenching and tempering is to obtain comprehensive mechanical properties, the hardness range is relatively wide. However, if the drawing specifies hardness requirements, the tempering temperature must be adjusted according to the drawing requirements to ensure hardness. For example, some shaft parts require high strength and thus high hardness; while some gears and shaft parts with keyways require lower hardness because milling and broaching processes are performed after quenching and tempering. Regarding the tempering holding time, it depends on the hardness requirements and workpiece size. We believe that the hardness after tempering depends on the tempering temperature and has little relation to the tempering time, but the workpiece must be thoroughly tempered. Generally, the tempering holding time for workpieces is over one hour. Cr can increase the hardenability of rigid couplings, improve the strength and tempering stability of steel, and provide excellent mechanical properties. For large cross-section dimensions or important quenching and tempering workpieces, Cr steel should be used. However, Cr steel has second-type temper brittleness. From the perspective of international development trends, new-generation CNC machine tools are developing towards ultra-high speeds to improve production efficiency, using new functional components (such as electric spindles and linear motors) to achieve ultra-high-speed machining. The electric spindles and linear motors required for rigid couplings are directly connected to the motor and spindle via expansion tightening coupling sleeves, eliminating intermediate components such as gearboxes to achieve ultra-high speeds. A single CNC machine tool requires at least five to six sets of couplings, and up to fifty to sixty sets. It is evident that this is a huge market. The German Ringspann rigid coupling industry is becoming increasingly popular. Coupled with factors such as corporate management, we will analyze what trends the coupling industry will present in the near future.

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