The total length of the insert made in the machining room at 20°C is 30.52mm. When the temperature of the insert is raised to 150°C, how much has the conductive dimension changed due to thermal expansion?
In addition, the material of this insert is pre-hardened steel of SCM440 series.
Answer the question
Let’s put the corresponding value into the formula to take a look
α: Linear expansion coefficient of metal (mm/mm)
α=11.5×10-6 mm/mm
L 0=30.52mm
t=20℃
t0=150℃
Therefore, λ=11.5×10-6×30.52×(150-20)=0.0456 (mm).