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Welding HeadSubmerged arc welding head consists of the wire spool, wire feed system, flux delivery hopper and electrical contact nozzle. The electrode wire is unwound from the spool by the power driven rolls, straightened by a set of pressure rolls and fed through the contact nozzle into the weld pool. The drive for wire feed is from a motor with speed control provided either by means of a gear box or by means of thyristor controls.
Defects Involving Inadequate Bonding Lack of fusion Involves lack of complete melting and fusion of some portion of the weld metal in a joint. It may occur either bet
FLUX FEEDING & RECOVERY SYSTEM The flux is fed by gravity from the flux delivery hopper mounted on the welding head through a tube into the welding zone. Flux feeding is normally
Gear Complaints Nature of Complaints (a) Gear shifting hard (b) Gear slipping (c) Gear noise
The two-storey frame shown in Figure Q4 is such that the self-mass may be considered to be located at the beam levels and the beams may be presumed to be rigid. The self-mass (
Instantaneous Centre: this is a point around which link rotates at a particular instant. Absolute Instantaneous Centre: this is a fixed centre around which link rotates.
Carbon nanotubes (CNTs) with low weight (density = 1.3 g/ cm^3), high tensile strength (50 GPa), and modulus of elasticity (1 TPa) in the axial direction have been touted as the st
how to find currents
Illustrate the specification of PDDI (i) The 3-D geometry of the product which is defined by a set of curves, surfaces and volumes. (ii) The topology which describes the se
Calculate Machining Time and Material Removal Rate A hole of 40 mm diameter and 50 mm depth is to be drilled in a mild steel component. The cutting speed can be taken as 65 m/
Find out the final extension and the work done: Problem: (i) A spring of stiffness 4 N/cm of extension is extended steadily yet the force of 20 N is reached. Find out th
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