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EFFECT OF PROCESS PARAMETERS
High voltage gives high velocities in the electron beams. The mutual repulsion effects in the constituent electrons will be less marked at high velocities than at low velocities. Therefore, the higher the voltage, the sharper the possible focus. The sharper the possible focus, the deeper the penetration for a given power. The longer the working distance, the greater the depth of field, and greater the focus tolerance. This of course is related to convergence of the beam in respect to the work piece. High voltage beams have a narrower angle of convergence than low voltage beams. As penetration in a material is proportional to the energy density during welding, surface speed will also affect penetration. The slower the speed, the greater the penetration, however, if the speed is too slow the entire work piece will heat up and a massive heat affected zone will result. Therefore the lowest practical speed is limited to around 250 mm per minute. The factors, which influence weld depth, are as follows:
For the beam shown below, we need to determine: (i) the support reactions R L and R R (ii) the shear force and bending moment diagrams (iii) the maximum stress in the b
Constructiona l Details of Two Stroke Engine: The basic components are cylinder, piston, piston liners, connecting rod, piston rings, crank pin, crank shaft, counter weight e
Bund / dike capacity is typically covered by local codes and regulations, however some general principles for liquid storage compounds are: • The net capacity of a bunded / dik
ORIFICE METER DERIVATION
A special feature of the PDES A special feature of the PDES development is the use of the formal language EXPRESS for modeling the product information. There will be capabiliti
SPOT WELDING In this type of welding, after proper cleaning of the surfaces, the metals to be welded are kept one above the other and two copper electrodes are kept on both sid
Find out stress - strain and elongation of bar: A circular rod having diameter 20 m and 500 m long is subjected to the tensile force of 45kN. The modulus of elasticity for st
Need a basic explanation of how to go about doing a plane strain analysis of a pressure vessel
The National Aeronautics and Space Administration (NASA) studies the physiological effects of large accelerations on astronauts. Some of these studies use a machine known as a cent
Feeler Gauge: It is used to measure minor clearances. Feeler gauges come in set of a few blades of different thickness as shown in Figure. It is used to measure the spark plug gap
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