A SYMPOSIUM on “Metallurgical Aspects of the Cold working of Non‐Ferrous Metals and Alloys” was recently held in London by the institute of Metals, and several of the papers…
Abstract
A SYMPOSIUM on “Metallurgical Aspects of the Cold working of Non‐Ferrous Metals and Alloys” was recently held in London by the institute of Metals, and several of the papers presented dealt wholly or in part with the importance of lubricants in this work. We give the gist of those sections and commence first with an extract from the paper given by S. F. Chisholm M.I.Mech.E., M.I.Mar.E. (Chief Engineer, Industrial, Vacuum Oil Co. Ltd.). This paper dealt wholly with Lubricants for the Cold Working of Non‐Ferrous Metals.
RICHARDSON, writing in Scientific Lubrication recently, stressed the need for strict attention to the cleanliness of the fluids used in hydraulically operated automatic…
Abstract
RICHARDSON, writing in Scientific Lubrication recently, stressed the need for strict attention to the cleanliness of the fluids used in hydraulically operated automatic transmissions with special reference to storage conditions, cleaning materials and the care of filters. In the same number of the journal Chisholm briefly described methods of oil filtration in general when discussing the maintenance of industrial hydraulic systems. It will be found too that the majority of articles and booklets dealing with hydraulic fluids and systems—industrial, automotive and aeronautic—pay attention to the potential effect of impurities, their exclusion and removal, in greater or lesser detail. Similarly diagrams of typical hydraulic circuits will usually show permanent wire mesh screens or strainers in the oil reservoir on the suction side of the pump and sometimes below the filler plug while by‐pass filters are generally located at some point in the circuit after the pump. (By‐pass filters owe their popularity to the fact that should the element become completely clogged the flow of hydraulic oil is not thereby interrupted).
IT IS BECOMING increasingly apparent throughout industry that senior technical and management personnel are so involved with day‐to‐day production problems that insufficient time…
Abstract
IT IS BECOMING increasingly apparent throughout industry that senior technical and management personnel are so involved with day‐to‐day production problems that insufficient time is available to them to deal with many of the factors which result in:
SPINNING ROOM LUBRICATION. The detrimental effect of using incorrect oil, particularly for the lubrication of spindles and other high‐speed parts, far outweighs any consideration…
Abstract
SPINNING ROOM LUBRICATION. The detrimental effect of using incorrect oil, particularly for the lubrication of spindles and other high‐speed parts, far outweighs any consideration of the price of oil, since every slight inferiority in lubricating value is multiplied many thousand times in the multiplicity of lubricated bearings. Correct lubrication, therefore, is more important in this department than anywhere else in the mill, especially in so far as power consumption is concerned.
Drawing Frames, Combers and Roving Frames. Drawing Frames (Fig. 3) are simple in construction, yet they must be in good mechanical condition and carefully maintained in order to…
Abstract
Drawing Frames, Combers and Roving Frames. Drawing Frames (Fig. 3) are simple in construction, yet they must be in good mechanical condition and carefully maintained in order to produce uniform, strong, high‐quality yarn. Roll bearings present an important lubrication problem. The weighting of the top rolls is distributed both to top‐roll and bottom‐roll bearings. Microscopic tenacious persistent films of lubricating oil must prevent metallic contact with the roll necks inorder to minimise friction, wear and power consumption. This must be accomplished with sparing application of correct oil if throw and spotting are to be prevented. It is the practice in some mills to use a fluid grease in order to minimise the possibility of oil creeping from the bearings and staining the slivers.
HYDRAULIC ACTUATION of machinery has been performed for many years in a relatively modest way, but the increasing complexity of modern machinery has, of recent years, generated a…
Abstract
HYDRAULIC ACTUATION of machinery has been performed for many years in a relatively modest way, but the increasing complexity of modern machinery has, of recent years, generated a greater appreciation of the virtues of this method of operation and control. The mechanical transmission of power by levers, cams and gears, might be regarded as the traditional method, but as greater demands were made for automatic operation and control, design complications became increasingly complex, and the principles of hydraulics, which had hitherto been employed only on simple presses, assumed much greater importance.
HISTORICAL. THE story of textile manufacture and the development of machinery designed to increase the production of yarns and cloths is an absorbing history. Although from the…
Abstract
HISTORICAL. THE story of textile manufacture and the development of machinery designed to increase the production of yarns and cloths is an absorbing history. Although from the earliest times man has been master of the art of spinning and weaving, yet it is only during the last 200 years that any form of mechanisation has entered the industry.
The author gives a review of developments over the past decade in new compositions and application practices for ball and roller bearing grease.
The National Engineering Laboratory is one of the larger stations of the British Government's Department of Scientific and Industrial Research. Current programmes include…
Abstract
The National Engineering Laboratory is one of the larger stations of the British Government's Department of Scientific and Industrial Research. Current programmes include theoretical and experimental studies of non‐Newtonian lubricants, the development of new methods of measuring the compressibility of hydraulic fluids, research into the behaviour of oils under hydrostatic tension, and investigations of various aspects of the phenomenon of aeration in hydraulic fluids. The Laboratory's facilities for carrying out sponsored research and testing in this field are briefly described.
OVER THE PAST FEW YEARS interest has grown in Britain and elsewhere in the use of extreme‐pressure (e.p.) lubricants (or more correctly perhaps, though less conveniently…
Abstract
OVER THE PAST FEW YEARS interest has grown in Britain and elsewhere in the use of extreme‐pressure (e.p.) lubricants (or more correctly perhaps, though less conveniently, load‐carrying additive lubricants) for marine main propulsion gearing, and many ships now go to sea with such lubricants in their main systems. Several technical papers on the development of such lubricants have been contributed recently, for example by Elliott and Edwards and Socolofsky and others, the main purpose of this paper is to indicate present and likely future marine main reduction‐gear requirements and to discuss how far these are met by the developments in extreme‐pressure lubricants.