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A recently installed automated materials handling system in a UK foundry is used as a vehicle to describe an engineering answer to an inventory management problem. The automated activity is between the production of cores and moulds from a sand/epoxy raw material and issuing them to the next stage of production—casting. Initial fragility of the product called for controlled physical movement and a limited useful product age required a close control over stocks and issues. Conveyors, storage and retrieval machines and other elements of the installation are described in terms of how they carry out functions of movement. Computers, programmable logic controllers and hard wired logic are described in hierarchical and functional terms.
Many reasons have been advanced for the apparent lack of competitiveness of several West European car manufacturers when comparing them with those of Japan. The underlying facts are more basic than robots replacing men, union versus management conflicts, low productivity, lack of investment in new plant and reluctance to adopt new processes. Many manufacturers in Western Europe are wasteful in the use of energy at several critical stages of car production, starting with energy use in the manufacture of the primary materials, ferrous and non-ferrous, plastics and tyres, proper utilization of process heat, insulation of buildings, dispersal of facilities, leading to extra transhipment costs and holding of contingency stocks for work in progress. Up to one-third extra energy is needlessly spent in many plants built or refurbished in the past two decades—much of it being lost to the atmosphere. Over half the production cost of a modern European motor car is accounted for by materials and around 30 per cent by manufacture. With Japanese cars requiring 20–30 per cent less energy during manufacture than their European counterparts, many of the old established manufacturers of cars and major components have a difficult future ahead, for the cost of energy is likely to rise year by year. A radical re-assessment of energy utilization during all phases of production is urgently called for.
Plant floor information systems are gaining popularity and importance in nearly every production environment. Current competitive and economic considerations demand that manufacturers be more concerned with obtaining the highest levels of efficiency and quality. In order to attain these goals, many manufacturers are implementing—or considering implementation of—computerized information systems. This paper examines the design of a plant floor information system for monitoring engine manufacture at the Cadillac engine plant.
Increasing emphasis is now being placed on the benefits of an integrated system with the basic information generated at the draughting stage being held on the computer and manipulated to produce cost estimates, drawings, production control information, machine control and certification of quality. The integration of these functions, together with the integration of component production, prototype manufacture and toolmaking, can result in reduction of both lead times and cost of production. The application of CAD/CAM within Delta is of general interest because Delta's companies (average size 300–400 employees) are in many ways typical of mechanical engineering companies and the specification of the computer aided design and manufacturing system which Delta has introduced, would be applicable to many small to medium sized engineering companies.
This paper reviews the development of high speeds throughout the world, with details of the records attained and commercial speeds worked in four countries where the 125 mile/h threshold has been reached or even exceeded. Achievements on conventional track in Great Britain, France and Federal Germany are outlined and the two examples of new purpose-built lines specializing in high speed passenger traffic in Japan and France are described in detail.
The paper examines the rapid growth in urban railway development throughout the world and notes that the systems involved almost exclusively rely on electric traction. The basic characteristics of various types of urban railway and their operation are explained and a comparison is drawn between selected vehicles on overseas systems. The UK scene is then examined together with the salient features of British vehicles used on urban railway systems. Conclusions are drawn as to the requirements of a future urban railway vehicle.
The paper begins with a brief historical resume of railcar development and then continues by outlining the three main types of service upon which light rail vehicles could be used with advantage. Passenger, marketing and operating requirements are identified. The paper outlines various technical considerations before concluding by discussing future options.
