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The purpose of this paper is to design, analyze and optimize a new type of inner-side working head for automatic horizontal dual-machine cooperative drilling and riveting system. The inner-side working head is the key component of automatic drilling and riveting system, and it is a challenge to design an inner-side working head which must be stiffness and stable with a compact structure to realize its functions.

According to the assembly structure features of large aircraft panels and riveting process requirements, a new type of inner-side working head is designed for pressure riveting. The force condition of the inner-side working head during the riveting process is analyzed and the deformation model is established. Design optimization is performed based on genetic algorithm and finite element analysis. The optimized inner-side working head is tested with automatic horizontal dual-machine cooperative drilling and riveting system.

The deformation model provides the precision compensation basis for control system. Application test results show that the automatic drilling and riveting system can realize assembly of large aircraft panel with high efficiency and quality through the inner-side working head.

The inner-side working head has been used in aircraft panel assembly.

The inner-side working head has been used in aircraft panel assembly.

This paper presents the design, analysis and optimization of a new type of inner-side working head which can realize automatic riveting for aircraft panel. The research will promote the automation of aircraft panel assembly.

The purpose of this study is to examine the effect of the rivet heads formed on the rivet strength by an experimental study if the bucking bar used in the forged rivet application includes gaps with different angles.

0.81 (0.032”) mm thick 2024 T3 sheets were used for the rivet joints. AD 2117 T4 forged rivets with a diameter of 3.2 mm (0.125″, 1/8″) are used for the joints. The special bucking bars (sidewall intersection angles of flat, 40°, 60° and 80°) were manufactured for the riveting process. To determine the mechanical properties of the prepared samples, cross-tension and tensile-shear tests were performed on a universal tensile testing machine.

As a result of the tensile-shear tests and cross-tensile, use of an 80 degrees bucking bar instead of rivets with a flat bucking bar increases the strength of the joint by approximately 20%. There is no systematic change in elongation. The results of tensile-shear and cross-tensile tests showed that forging rivets by special bucking bars have a significant effect on joint strength.

Increase in strength will require the use of thinner sheet metal and smaller rivets to achieve the same strength. This will reduce the weight of the aircraft. Weight reduction also means less fuel consumption and more economical flight. This increase in strength is a very important scientific achievement.

The purpose of the study was to investigate the alignment between current product and manufacturing systems and how it could be achieved.

Case study research method was chosen for the collection and analysis of empirical data. The data was of qualitative nature and was collected using research techniques such as observations through video recordings of processes, documents and open and semi-structured interviews.

The variation of outer side sub-element of the exterior wall element was found to not be aligned with its corresponding assembly. A hybrid assembly of outer side sub-elements characterised by flexibility and reconfigurability can be developed.

The study is limited to the exterior wall element and corresponding manufacturing system.

The presented approach was formulated with the aim to be used both for the analysis of existing products and manufacturing systems as well as for the design of new manufacturing systems.

So far, this is the first study in the context of timber house building where the alignment between product and manufacturing systems was investigated by considering product variety and flexibility of manufacturing systems.

Presents some factors that influence the design of workplace and worker loading in the process of sewing garments. Researches both existent and suggested work methods in workplace design and worker’s loading, with regard to sewing men’s shirts. The use of the suggested working method enables minimization of measured working time of the analysed technological operation of 21.77 per cent. The estimation, by OVACO working postures analysing system, the OWAS method shows that worker’s loading for a newly designed workplace compared to the suggested working method brings, in principle, advantages for the workers.

The purpose of this paper is to provide a safe control strategy for aloft hot-line assembly of connection fittings in 110kV intelligent substations, which is significant to research on hot-line working robots.

This paper addresses challenges of the task and establish the contact models of connection fittings. By using this control strategy, neither high precision vision positioning nor preset global reference coordinate system is required. Visual computing only needs to provide an approximately position for the manipulator end-effector, after which the connection fittings assembly task could be completed with the posture of the manipulator adjusted following the guidance by force-position control. The authors also analyze the influence of the intervention of manipulators on the very non-uniform electric field during the operation.

This strategy will be particularly useful for the hot-line assembly of connection fittings in 110kV intelligent substations as well as some assembly tasks where uncertain target position and complex contact surface such as cylindrical hole is involved.

This assembly strategy is tested in energized simulated experimental system. The experiment results show that the robot can replace the manual operation to complete the assembly task safely and efficiently.

This assembly strategy is able to achieve the assembly task of connection fittings. Unlike other peg-in-hole assembly strategy, it does not require high stability of manipulator or plane contact surface around the hole.

Smiths Industries is to supply the head‐up display system for the Sea Harrier. The company will design, develop and make the electronic head‐up display and weapon aiming computer system for the latest version of the HS Harrier which will operate from Royal Navy ships.

THE Twenty‐fifth S.B.A.C. Flying Display and Exhibition is to be held at Farnborough during the week Monday, September 5, to Sunday, September 11, promises to be one of the most interesting yet held as for the first time member companies of the Society have nominated for entry aircraft from member countries of the European A.I.C.M.A. (Association Internationale des Contructeurs de Materiel Aérospatial) that are powered by British engines. Seven European aircraft will be taking part, four of them sponsored by Bristol Siddeley Engines Ltd. and three by Rolls‐Royce Ltd. The dominant theme of the Show will be collaboration, and it is fitting that the foreign aircraft have been sponsored by the aero engine manufacturers as they have advanced farther along this road than the airframe companies. Between them, they have close associations with practically all the major engine manufacturers in the Western world. Apart from the models and displays which will be mounted by the major airframe and engine manufacturers reflecting their growing involvement with European projects, the stands of the Associate Members of the Society of British Aerospace Companies will have many examples of materials, techniques and equipment that these companies are producing in support of current programmes, some of which will be for the American military aircraft now on order for the Royal Air Force and the Royal Navy.

THE trend of design in the modern aeroplane has been toward improved performance realised through external cleanness. It is apparent that the number of essential units comprising a modern aeroplane is nearly a minimum at the present stage of the art, and it appears also that the possibilities of further striking reductions in the drag of these units, due to change in form or shape either individually or in combination, are not great.

October 21, 1970 Factory — Dangerous machinery — Dangerous combination of machinery and material — Danger arising from “nip” between moving workpiece and imperceptibly moving boring bar — Automatic cooling device — Coolant applied by hand — Practice known to employers — Workman's hand caught in “nip” — Whether duty on employers to fence boring bar — Whether dangerous part of machinery — Danger of accident foreseen by employers — Whether foreseeable — Workman unable to establish exactly how accident happened — Materiality — Factories Act, 1961 (9 & 10 Eliz. II, c.34), s.14 (1).