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Grinding fluid development and application
February 9, 1977, Birmingham, UK
Grinding fluid development and application This one-day discussion meeting was attended by delegates from the engineering, aerospace, automotive, bearing, cutting tool, grinding wheel and machine tool manufacturing industries. The meeting was arranged to present to industry the results of part of a coordinated SRC project on grinding, and to discuss industrial-academic collaboration for the future. The background was given briefly by Dr Sweeney (MTIRA). The opening paper in the morning session was given by Dr Tripathi (Birmingham University) on "Importance of Grinding Fluids in Production". His investigations confirm that the grinding fluids have important effects on the whole grinding system. They affect the limitations to production caused by wheel glazing and loading, work burn and cracking, high machine power consumption and breakdown, fluid pumping and Filtration, and operators' health. Evidence was given that the failures of components in engines, reactors, etc, may be related to the surface problems caused by a wrong selection of fluid. It is recommended that objective experimental data, including grinding forces, wheel wear, surface and subsurface properties of the work, wheel glazing and loading, should be used as the basis of
fluid selection for optimum performance. A new water-based fluid developed in the project was cited as an example of logical research application. In some circumstances this performs as well as an oil but has much better health rating. The theme was continued in the second paper entitled "Selection of Grinding Fluids", presented by Professor Rowe (Birmingham University). He suggested giving ratings to the fluids on the basis of the technical performance data, combined with secondary factors, including health hazards, machine corrosion, stock appearance, emulsion stability, handling, etc. A weighting factor for each of these categories of the data could then be fixed depending upon the stress a particular user wished to place on a particular parameter. Not enough is currently known about the subjective criteria applied by users and industrial cooperation was invited for supplying measurement facilities and data. The data bank could readily be updated as information became available. An economic model of the grinding system is presently being developed, so that costs can be realistically assessed with all the other factors. The afternoon session was devoted entirely to discussion, which was intro-
February 15-16, 1977, London, UK
National Conference on Condition Monitoring Described by the organisers as the first of its kind, the National qonference on Condition Monitoring was designed to give a broad view of both the philosophy and technology of the subject. The conference was intended to show
maintenance managers the potential of condition-based maintenance and to indicate the advantages and limitations of the various tecfiniques. It was not a conference for experts. Eight papers reviewed established, and
duced by speakers from industry. Trials with water-base grinding coolants in practice have shown that the main problems are caused by slideway corrosion, contamination by hydraulic and lubricating oil, and growth of bacteria and fungi. Most machines are not specifically designed for synthetic coolants. Evaluation of fluids is difficult in practice and it may be that the concept of a data bank is impractical on a broad scale. It is, however, important to attempt to compare fluids, especially to monitor the performance and deterioration of a fluid during use. The possible hazards associated with sodium nitrite, one of the first synthetic coolants, were mentioned. This solution is no longer acceptable in continental Europe, though it continues to be used in the UK. Other points of concern were the machinists' acceptance of new fluids, fuming problems of oil-based products, and the continuing use of obsolete machine tools in many places. The synthetic diamond suppliers expressed interest in the fundamental research on wheel/ workpiece/coolant interactions, and' manufacturers of fdtration equipment offered to participate, while machine tool manufacturers welcomed the idea of evaluation of the fluids by an independent agency which could advise the industry on the rating of a fluid, based on scientific investigations. It is hoped that useful collaboration between the industrial and academic participants will follow, extending that already existing in the coordinated inter-university research programme on grinding, sponsored by the Science Research Council.
well documented, techniques and the discussion sessions gave delegates a chance to air their own problems. One recurrent theme in the conference was that, although the technology of data gathering is well developed, we are still "low on the learning curve of interpretation."
Kurtosis Perhaps the only 'new' technique described was the application of kurtosis to monitoring the condition of
TRIBOLOGY international June 1977
189
Grinding fluid development and application This one-day discussion meeting was attended by delegates from the engineering, aerospace, automotive, bearing, cutting tool, grinding wheel and machine tool manufacturing industries. The meeting was arranged to present to industry the results of part of a coordinated SRC project on grinding, and to discuss industrial-academic collaboration for the future. The background was given briefly by Dr Sweeney (MTIRA). The opening paper in the morning session was given by Dr Tripathi (Birmingham University) on "Importance of Grinding Fluids in Production". His investigations confirm that the grinding fluids have important effects on the whole grinding system. They affect the limitations to production caused by wheel glazing and loading, work burn and cracking, high machine power consumption and breakdown, fluid pumping and Filtration, and operators' health. Evidence was given that the failures of components in engines, reactors, etc, may be related to the surface problems caused by a wrong selection of fluid. It is recommended that objective experimental data, including grinding forces, wheel wear, surface and subsurface properties of the work, wheel glazing and loading, should be used as the basis of
fluid selection for optimum performance. A new water-based fluid developed in the project was cited as an example of logical research application. In some circumstances this performs as well as an oil but has much better health rating. The theme was continued in the second paper entitled "Selection of Grinding Fluids", presented by Professor Rowe (Birmingham University). He suggested giving ratings to the fluids on the basis of the technical performance data, combined with secondary factors, including health hazards, machine corrosion, stock appearance, emulsion stability, handling, etc. A weighting factor for each of these categories of the data could then be fixed depending upon the stress a particular user wished to place on a particular parameter. Not enough is currently known about the subjective criteria applied by users and industrial cooperation was invited for supplying measurement facilities and data. The data bank could readily be updated as information became available. An economic model of the grinding system is presently being developed, so that costs can be realistically assessed with all the other factors. The afternoon session was devoted entirely to discussion, which was intro-
February 15-16, 1977, London, UK
National Conference on Condition Monitoring Described by the organisers as the first of its kind, the National qonference on Condition Monitoring was designed to give a broad view of both the philosophy and technology of the subject. The conference was intended to show
maintenance managers the potential of condition-based maintenance and to indicate the advantages and limitations of the various tecfiniques. It was not a conference for experts. Eight papers reviewed established, and
duced by speakers from industry. Trials with water-base grinding coolants in practice have shown that the main problems are caused by slideway corrosion, contamination by hydraulic and lubricating oil, and growth of bacteria and fungi. Most machines are not specifically designed for synthetic coolants. Evaluation of fluids is difficult in practice and it may be that the concept of a data bank is impractical on a broad scale. It is, however, important to attempt to compare fluids, especially to monitor the performance and deterioration of a fluid during use. The possible hazards associated with sodium nitrite, one of the first synthetic coolants, were mentioned. This solution is no longer acceptable in continental Europe, though it continues to be used in the UK. Other points of concern were the machinists' acceptance of new fluids, fuming problems of oil-based products, and the continuing use of obsolete machine tools in many places. The synthetic diamond suppliers expressed interest in the fundamental research on wheel/ workpiece/coolant interactions, and' manufacturers of fdtration equipment offered to participate, while machine tool manufacturers welcomed the idea of evaluation of the fluids by an independent agency which could advise the industry on the rating of a fluid, based on scientific investigations. It is hoped that useful collaboration between the industrial and academic participants will follow, extending that already existing in the coordinated inter-university research programme on grinding, sponsored by the Science Research Council.
well documented, techniques and the discussion sessions gave delegates a chance to air their own problems. One recurrent theme in the conference was that, although the technology of data gathering is well developed, we are still "low on the learning curve of interpretation."
Kurtosis Perhaps the only 'new' technique described was the application of kurtosis to monitoring the condition of
TRIBOLOGY international June 1977
189