rb1957,the torque may increases when the temperature is changed, for example the joint plates expand larger than the fastener shank along the axis direction of the shank though there is no movement between the nut and shank, and vice visa.
rb1957, the optical method can be used to judge/measure the rotation between the nut and the shank but it may be difficult to be used to measure the difference between the deformation of the fastener and the joint plates. The deformation difference can also make the nut loose if the deformation...
Strong,thank you. The high temperature strain gage can also be used to measure clamping force of the fastener. This is one of the solutions I am looking for.
Though the clamping force of the fastener or the strain of the fastener shank cannot be measured directly since the shank is hidden...
moon161,thank you for your help and kindness.
EdStainless and IFRs, the optical method may be a good one. We thought of it and will try it when the condition is ok.
EdStainless,there usually be preload on the fastener and when the temperature-induced deformation of the fastener is larger than...
Thank you all!
EdStainless, you method may be ok to measure the rotation between the nut and the shank but cannot used to measure other tightening torque loosen mechanism such as the deformation of the fastener and the plates.
moon161,btrueblood , seems your method with long extension is the...
Thank you,btrueblood and drawoh,I want to measure the tightening torque of the nut in real time and judge whether it is loosen during operation. The material of the connected parts of the mechanical joint are ceramics and the operation temperature fluctuates around 1200 degree Celsius. The high...
Dear all,
Does anyone know how to measure the fastener’s torque at 1200 degree Celsius or even higher?
Are there any torque transducers about this? Or are there any companies can provide this kinds of service?
Thank you.
