Motive power testing of locking capacity for fastener with lateral loading
Testing fastener is clamped with determinate loading, frequency, amplitude, broadwise and dynamic loading for testing of self-locking capacity(anti-loosing capacity).
Recording instantaneous value of clamping loading, analysing and judging anti-loosing capacity of fastener.
GJB715.3A—2003 vibrating testing of self-locking nut
It must be no damaging of structure, cracking, disrupting, loosing of fastener, damaging of screw thread, disappearing of locking capacity.
Permitting rotating angle of nut relative to bolt is equal or less than 360°.
If bolt is damaged, nut should not be judged not qualifed.
Relative standard
GJB3.1A—2003 universal requirement of MJ nut
GJB3.2A –2003 MJ screw thread, ultimate limit of bolt and screw thread of nut.
HB8026—2002 TC16 Hexagon, self-locking thick nuts, in titanium alloy
HB8027—2002 TC16 Hexagon, self-locking thin nuts, in titanium alloy
GB/T3098.9—2002 Mechanical properties of fasteners prevailing torque type steel hexagon nuts.
ISO 2320:1997
HRJ—600KN testing machine for fastener broadwise vibrating: Heng Rui Jin testing machine limited company
This type of machine is used in friction type, bearing type, tensile type, torshear type, big six angle bolt. Testing and researching self-locking capacity (anti-loosing capacity) for connection pair of fastener and connection pair with prestressing.
Clamping loading 600KN.
Broadwise loading: 200KN, amplitude of broadwise is ±2mm, testing frequency is 1—15Hz.
Bolt/nut: M8—M42mm
Heng Rui Jin HRJ—Test entire digital close loop, multichannel testing system.
NDS, NDW, EZ torsion testing machine for wire stock and bolt