This paper deals with the coefficient of determination screw connection friction between thread and matrix. The was measured using a laboratory device an M20 without any grease and, subsequently, plastic added (CX80 silicone, lithium, copper grease). When is added, in threads heads limited consistently retained. tightening by torque, which represents prevailing assembly method standard screwing...

A comparative simulation of hot radial shear rolling (RSR) billets made a superelastic Ti–Zr–Nb and commercial VT6 alloy was performed using the QForm finite element modeling program. Rolling in 48 modes with variable feed angle elongation ratio at 4 levels initial temperature 3 investigated for each alloy. The rheology during deformation determined experimentally by upset forging imported into...

high variability in delivering the target torque is reported for friction-style mechanical torque limiting devices (f-s mtlds). the effect of aging (number of use) on the accuracy of these devices is not clear. the purpose of this study was to assess the effect of aging on the accuracy (±10% of the target torque) of f-s mtlds.fifteen new f-s mtlds and their appropriate drivers from three differ...

accurate delivery of torque to implant screws is critical to generate ideal preload in the screw joint and to offer protection against screw loosening. mechanical torque-limiting devices (mtlds) are available for this reason. in this study, the accuracy of one type of friction-style and two types of spring-style mtlds at baseline, following fatigue conditions and sterilization processes were de...

− This paper gives details of a round robin torque comparison involving the National Physical Laboratory (NPL) and nine other UK laboratories. The comparison covered two ranges: 20 N·m to 100 N·m and 200 N·m to 1 kN·m. The work was an effective way of disseminating the unit of torque to industry via the UK’s new national torque standard, giving assurance to laboratories and customers and identi...

We investigated the occurrence of solvent cracking in unplasticized polyvinyl chloride pipes using test materials prepared by conventional methods. confirmed that voids were formed on inner surface pipe at a holding time 2 weeks under conditions room temperature (298 K), 1.0 g applied adhesive, and 4 N/m U-band tightening torque. The linearly circumferential direction regions contact with axial...