Advantages a
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0 types of tipper body mentioned by Mr. ID. F. Dartnell, sales development division, Alcan Industries Ltd., Banbury, in a talk to the Institute of Road Transport Engineers' Midlands Centre, in Birmingham last week, represent a new concept in design.
Mr. Dartnell, who spoke under the heading of "Aspects of aluminium in commercial vehicles ", elaborated on various details of design in a subsequent interview with The Commercial Motor.
In his talk Mr. Dartnell, observing that the development of aluminium bodies had reached the "what you can get away with" stage, dealt with aluminium boxvan bodies as well as tipping vehicles. With regard to the latter, he claimed that welded construction combined with new stressing techniques offered a reduction in costs as well as weight. His recommendations relating to boxvan bodies were concerned with improvement in conventional types of bolted and riveted structures that would have the additional advantage in some cases of facilitating standardization.
Welding by the MIG (metal inert gas) method is considered by Mr. Dartnell to be the most satisfactory process available for fabricating tipper bodies, the fact that the fill wire forms the electrode and that the speed of welding equals the highest manual speed at which the operator can work saving valuable time. Moreover it eliminates edge preparation apart from wire brushing or cleansing with spirits, and the overall reduction in labour costs is substantial.
No extrusions are used for a six-sided body, the sections being formed of -1-in.. y16--in. or 10-gauge sheet on a press. Special extrusions, designed to facilitate welding, have been produced for a dropside. The weight saved in the case of a 20 cu. yd. body may be as much as 1 ton.
In the case of tipper bodies that are elevated by a front-body lifting gear the aluminium sub-frame longitudinal acts