The impact of torque dispersion in fastener installation on track stiffness uniformity
Q1: What is torque discreteness?
A1: It refers to excessive differences in installation torque among different fasteners, some too tight, some too loose, not uniformly controlled within the design range.
Q2: Why does torque discreteness destroy stiffness uniformity?
A2: Sections with higher torque have greater clamping force and stiffness; those with lower torque have lower stiffness, causing sudden stiffness changes, impacts, and vibrations.
Q3: Which fastener defects are accelerated by uneven stiffness?
A3: Clip fatigue fracture, bolt loosening, pad crushing, gauge block uneven wear concentrate at stiffness change locations.
Q4: Why must calibrated torque wrenches be used?
A4: Ordinary wrenches cannot accurately control torque and easily cause uneven tightness; only calibrated wrenches ensure consistency.
Q5: How to reduce torque discreteness and improve line smoothness?
A5: Uniformly use qualified torque wrenches; implement standardized installation; sample torque after construction; retighten and adjust positions with excessive deviation.