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Document ID (ISN)33180
CIS number 80-534
ISSN - Serial title Metal Construction
Year 1979
Convention or series no.
Author(s) Head I.W., Silk S.J.
Title Integral fume extraction in MIG/CO2 welding.
Bibliographic information Dec. 1979, Vol.11, No.12, p.633-638. Illus. 2 ref.
Abstract After a brief discussion of relevant aspects of the welding process, the integral exhaust system is described. The fume extraction point is mounted on the welding gun either in the form of an annular exhaust slot or a perforated extraction chamber. The exhaust flow rate is 1000-1700l/min, and a 25-38mm bore extraction hose is used. Problems of the system, which must satisfy the conflicting requirements of a non-turbulent downward flow of shielding gas and an upward and inward flow of fume to the exhaust system, are presented. Operational factors having an influence are: shape and position of work and angle of welding gun; gas flow and electrode stickout; exhaust conditions. A reduction of fume levels by up to one-third can be expected, and the effectiveness of the system is substantiated by results of atmospheric sampling.
Descriptors (primary) shielded-arc welding; exhaust devices; welding fumes; local exhaust
Descriptors (secondary) aerodynamics; description of equipment
Document type -
Subject(s) Metal production and metalworking
Broad subject area(s)
Browse category(ies) Welding and cutting
Ventilation