摘要:

By means of a number of general models the relationships are analysed which are of importance when applying shiftwork systems : for the organization which applies them, its employees, the owners and the community. A quantitative model gives an insight into the shiftwork system which can be regarded as an optimum from an economic angle (depending on the pay level, shift allowances and invested capital). Divergences from the optimum may decrease the rate of return considerably. The outcomes of an analysis of alternatives in a series of companies axe discussed. The approach on the side of companies frequently proves not to be satisfactory. It appears that better information is desirable, with regard to both the economic and the social aspects of shiftwork.

ISSN:0020-7543    

DOI:10.1080/00207547408919537

出版商:Taylor & Francis Group    

年代:1974

数据来源: Taylor

摘要:

A wide variety of computer programmes for solving facilities design problems have been developed. Since the arrival of programmes like CORELAP and CRAFT in the early sixties, a variety of aspects of this problem have been approached using computer technology. Engineers and architects appear to be the developers and users of most of these programmes

ISSN:0020-7543    

DOI:10.1080/00207547408919538

出版商:Taylor & Francis Group    

年代:1974

数据来源: Taylor

摘要:

A classification and coding system for hull structural steel components in the shipbuilding industry is described. The system uses nine digits and is of a fixed digital significance type. It has been created to provide information for both design and production, and also hull component statistics

ISSN:0020-7543    

DOI:10.1080/00207547408919539

出版商:Taylor & Francis Group    

年代:1974

数据来源: Taylor

摘要:

The nature of sequencing problems of the Travelling salesman problem type is examined. Mathematical methods applicable to this particular sequencing problem are surveyed and characteristic individual as well as common properties are described

ISSN:0020-7543    

DOI:10.1080/00207547408919540

出版商:Taylor & Francis Group    

年代:1974

数据来源: Taylor

摘要:

One of the most important process parameters in making compound products is the expansion of the bonding surface. Bonding is not obtained until a critical surface expansion, characteristic of the deformation process, is reached. This paper deals with an experimental investigation of the influence of a superimposed hydrostatic pressure on the critical surface expansion during a forging process. The critical surface expansion appears to decrease with increasing hydrostatic pressure. This may be due to the fact that the close contact between the materials necessary to obtain bonding is created by a micro-extrusion of the surfaces into each other. This may explain why the bond strength achieved by different processes, such as forging and extrusion, is quite different for the same value of the surface expansion.

ISSN:0020-7543    

DOI:10.1080/00207547408919541

出版商:Taylor & Francis Group    

年代:1974

数据来源: Taylor

摘要:

The new method of estimating the Limiting Drawing Ratio (L.D.R.) in deep-drawing makes use of oversize blanks with standard diameters. Experimental results indicate that the bulge depth at fracture, to blank diameter curves for oversize blanks can be expressed by a particular type of an exponential expression. To evaluate the parameters in the equation, three tests until fracture, using three different oversize blanks are necessary. The bulge depth and blank diameter data are then used in the solution of the three simultaneous equations. This calculation is best performed on a computer to obtain high accuracy. Thus the limiting blank size and L.D.R. can be calculated

ISSN:0020-7543    

DOI:10.1080/00207547408919542

出版商:Taylor & Francis Group    

年代:1974

数据来源: Taylor

摘要:

The scope of the current research on sheet metal forming is surveyed in the light of precise definitions of stretchability on the one hand, and deep drawability on the other. Particular emphasis is placed on the elucidation of basic concepts brought about by recent research, such as the distinction between the ductility of the material and the extent to which it is exploited in a particular process. Several outstanding problems in sheet metal forming are discussed for their potential benefit to sheet metal engineering. It is believed that present results will lead to greater refinement in the specification and selection of sheet metal in the future, as well as to investigations on such problems as wrinkling and non-coaxial strain paths.

ISSN:0020-7543    

DOI:10.1080/00207547408919543

出版商:Taylor & Francis Group    

年代:1974

数据来源: Taylor

摘要:

When machining was carried out in precisely defined conditions, the derived strain at the borderline between continuity and discontinuity in machining was found to be similar in magnitude to that of the strain as determined by a torsional test for a variety of metals which individually exhibit very different magnitudes of shear strain at failure

ISSN:0020-7543    

DOI:10.1080/00207547408919544

出版商:Taylor & Francis Group    

年代:1974

数据来源: Taylor

摘要:

The integration of production systems and social values must be seen to be taking place within a continuously changing environment

ISSN:0020-7543    

DOI:10.1080/00207547408919545

出版商:Taylor & Francis Group    

年代:1974

数据来源: Taylor

ISSN:0020-7543    

DOI:10.1080/00207547408928099

出版商:Taylor & Francis Group    

年代:1974

数据来源: Taylor