Full exam for Advanced Manufacturing Processes in the Mechanical Engineering degree programme at Politecnico di Milano. The document covers: ADVANCED MANUFACTURING PROCESSES Proff. Strano – Annoni – Demir SURNAME NAME PERSONAL ID Exam – 9th September 2022 Question n. 1 Which of the following laser component/function couple is given WRONG? o Yttrium aluminium garnet doped with neodymium ions – Active medium o Diode –
Full exam for Advanced Manufacturing Processes in the Mechanical Engineering degree programme at Politecnico di Milano. The document covers: ADVANCED MANUFACTURING PROCESSES Proff. Strano – Annoni – Demir SURNAME NAME PERSONAL ID Exam – 9th September 2022 Question n. 1 Which of the following laser component/function couple is given WRONG? o Yttrium aluminium garnet doped with neodymium ions – Active medium o Diode –
Import quality: text was extracted directly from the original document.
Representative passages recognised in different parts of the material. The full extracted text remains available to search, while this compact preview makes the page easier to read.
ADVANCED MANUFACTURING PROCESSES Proff. Strano – Annoni – Demir SURNAME NAME PERSONAL ID Exam – 9th September 2022 Question n. 1 Which of the following laser component/function couple is given WRONG? o Yttrium aluminium garnet doped with neodymium ions – Active medium o Diode – Active medium o Bragg grating – Wavelength harmonic generator o Diode – Pumping medium o CO2+N2+He mixture – Active medium Question n. 2 Considering the motionless extended planar heat source during a laser heat treatment which of the following statements is CORRECT? o With a diode laser source it is easier to increase the temperature of gold compared to steel. o The cooling rate of steel can be increased by decreasing the power and increasing the pulse duration o It can be used to precisely estimate the time required to start evaporating the surface of a Ni-alloy o The model correctly estimates the temperature rise for all beam shapes. o At a given point below the surface, the maximum temperature can be reached after turning off the laser emission Question n. 3 Which of the following conditions is mandatorily required for a remote keyhole laser welding operation? o An inert gas protecting the melt pool o Irradiance greater than 106 W/cm2 o Beam wobbling o Filler wire o Presence of gap Question n. 4 What are the most important properties of a material suited for rapid tools for injection molding? (multiple answer are allowed) Does this tube require a preliminary bending operation? o High compression resistance o High temperature resistance o High UTS o Low glass transition temperature o All of the above o None of the above Question n. 5 Why should we consider the spindle power and torque diagram in micromilling? o None of the above o To calculate the workpiece roughness o To check if the spindle…
First page of the document.
