Germany CLV 50-F2262 coupling CLV 50-F2262 model CLV 50-F2262 price

CLV 50-F2262 coupling

CLV 50-F2262 coupling introduction

Composed of two hubs and a thin-walled metal tube, connected by welding or bonding. Although many other materials are available, stainless steel and nickel are the most commonly used metal tube materials. Nickel tubes are produced using an electro-deposition method. This method first involves machining a solid mandrel into a corrugated shape, electroplating nickel onto the mandrel, and then chemically dissolving the mandrel to obtain a nickel bellows. This method allows for precise control of the bellows wall thickness and can achieve thinner wall thicknesses than bellows made by other methods. This thin-walled bellows gives the coupling high sensitivity and rapid response, making it ideal for applications in extremely small and precise instruments.

CLV 50-F2262 coupling features and applications

1) Bellows couplings are backlash-free and highly sensitive. 2) High elasticity provides better equipment protection. 3) Capable of absorbing vibration while compensating for radial, angular, and axial misalignments. 4) Resistant to oil contamination and corrosion. 5) Torsionally rigid, with identical clockwise and counter-clockwise rotation characteristics. 6) Commonly used in industrial machinery such as CNC machine tools and indexing tables. The elastic element of the bellows coupling is a precision metal bellows, available in flexible and rigid series. The flexible series offers greater elasticity and is often used in micro-applications such as encoders and sensors, while the rigid series is mainly applied in servo motors and CNC machine tools (machining centers).

CLV 50-F2262 coupling troubleshooting

Based on the coupling structure, power is transmitted from the coupling to the power output shaft (gearbox shaft) via a clamping hub assembly, and to the power input shaft via a clamping collar. Power is transmitted between the clamping end and the clamping hub end of the coupling through the bellows, which is bonded to the clamping hub and clamping collar. The fault location is at the clamping collar and bellows. Two pre-deformation grooves are machined radially into the clamping collar. The groove width is approximately 2mm. The groove on the side with the clamping screw is a through-slot in the diametrical direction but does not penetrate completely in the depth direction at the connection with the bellows, featuring a beveled cross-section. The other groove does not penetrate radially, but its longitudinal section at the connection with the bellows also does not penetrate completely, featuring a beveled cross-section. During clamping, the clamping screws are tightened to the specified torque using a torque wrench. The deformation of the clamping collar eliminates the clearance between the bore and the shaft to achieve clamping. As seen in the cross-sectional view, due to the presence of the two pre-deformation grooves, the cross-section at this location is weaker, and deformation primarily occurs at these grooves. The pre-deformation groove on the side with the clamping screw has the smallest cross-sectional area and is the weakest point. Permanent figure-eight deformation marks at its end indicate that the stress in this area during clamping is significant, exceeding the yield limit of super-hard aluminum. According to the stress distribution diagram, once the bevel gear box and main gearbox are assembled and clamped, the stress value at the bonded interface of the pre-deformation groove on the clamping screw side is 164Mpa, with a deformation magnitude of 0.027mm. During launcher operation, the coupling is subjected to alternating composite stresses, causing even greater stress and deformation at this location. If minor defects such as voids, inclusions, or blemishes exist at the bonded interface during manufacturing, micro-cracks will first form at defective areas within the region of highest stress on the coupling's bonded surface when the alternating stress exceeds the bond strength, creating a fatigue source. Due to stress concentration at the crack tip, the crack gradually propagates with increasing stress cycles and prolonged exposure to constant stress. As the crack spreads, the bonded interface is progressively weakened. When the crack reaches a certain size, fatigue failure occurs. The coupling functioned normally during initial tests, but as usage time increased, cracks gradually propagated. Even under low loads, the coupling eventually failed. The presence of stress at the bonded joint is a potential hidden cause of failure. To avoid generating excessive stress when the coupling clamping collar is tightened, annular grooves are typically cut into the clamping collar for stress relief.

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