Browsing CoA. Memos: Manufacturing and Production (1963-1965) by Title

Browsing CoA. Memos: Manufacturing and Production (1963-1965) by Title

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  • Comparison of PERPRO tools grade N5 and N10 against grade N5D and N10D 
    College of Aeronautics, (Cranfield) (College of Aeronautics, 1964-02)
    Tools of grade N5, N5D, N10 and N1OD were tested to 0.030 in. flankwear when machining EN 9 at a cutting speed of 500 f.p.m. with 0.010 in/rev. feed and 0.10 in. depth of cut. The results showed that there was no ...
  • Determination of effective stress-effective strain relationship for use as a machinability index 
    Welsh, M. J. M. (College of Aeronautics, 1964-03)
    In recent work it has been shown that the effective stress effective strain relationship of a work material is important in determining the shear angle in orthogonal cutting. This note describes the method of obtaining ...
  • Estimating the charge size in explosive forming of sheet metal 
    Noble, C. F. (College of Aeronautics, 1964-05)
    A method is given for estimating the charge size for the explosive forming of sheet metal components. The method is applied to a number of relatively simple shapes and good agreement is shown with experimental results.
  • An explanation of the apparent bridgman effect in merchant's orthogonal cutting results 
    Oxley, P. L. B.; Welsh, M. J. M. (College of Aeronautics, 19)
    Abstract In Merchant's modified shear angle solution it is assumed following Bridgman that the shear strength of the work material is a function of the hydrostatic stress. Although Merchant's experimental results confirm ...
  • Farnham rolls investigation 
    Dunglinson, I.; Eynon, G. R.; Harris, W. T.; Trethewy, B.; Painter, A. (College of Aeronautics, 1964-02)
    The object of this experiment was to investigate the possibility of obtaining pre-setting data for the 1 Farnham Rolls'. The experiment was carried out by applying certain deflections and measuring the resulting radii ...
  • Flow along tool-chip interface in orthogonal metal cutting 
    Enahoro, H. E.; Oxley, P. L. B. (College of Aeronautics, 1965-07)
    In recent papers it has been suggested that over part of the toolchip contact zone the chip does not slide but sticks to the tool, chip flow taking place by shear within the body of the chip. Sticking contact is ...
  • Horizontal band-saw 
    Foot, R. M.; Boardman, G. E. T.; Dailey, B. R.; Baller, E. G. A.; Noble, C. F. (College of Aeronautics, 1964-05)
    The effect of various parameters on the performance of the band saw when cutting mild steel-with a 10 t.p.i. raker-set blade were established over a limited range. These are discussed fully in the ‘conclusions'. With ...
  • Hydraulic test rig 
    Healey, M. (College of Aeronautics, 1964-08)
    Hydraulic Test Rig The rig comprises a grinding wheel head spindle driven by a motor and carrying an inertia load made up of detachable steel discs. On the opposite end of• the shaft to the motor is mounted a radial ...
  • An interface design for a shock-tube system 
    Beevis, D.; Leamon, T. B.; Lovesey, E. J.; Neale, J. G.; Strank, R. H. D. (College of Aeronautics, 1964-08)
    A linear display of lights and a mimic diagram arrangement of switches are suggested for the proposed high pressure shock tube control panel to enable the operator to follow a safe and reliable operating procedure.
  • Introducing strain-rate dependent work material properties into the analysis of orthogonal cutting 
    Oxley, P. L. B. (College of Aeronautics, 1963-11)
    An analysis is presented in which cutting speed, depth of cut and certain strain-rate dependent work material properties are taken into account. Good agreement between theory and experiment is shown over a wide range ...
  • An investigation into high precision control of the relative angular position of two shafts over a range of speeds and ratios 
    Healey, M. (College of Aeronautics, 1964-05)
    SUMMARY The paper sets out to describe how a servo mechanism may be applied to generative gear grinding machines and an appropriate specification is drawn up. The system involves separate motor drives to the two shafts, ...
  • An investigation of the assembly of transistor cores: first year project 1964/65 
    College of Aeronautics, (Cranfield) (College of Aeronautics, 1965-05)
    1. Introduction This project was carried out for the Texas Instrument Company of Bedford/ by members of the Ergonomics/ Operational Research and Management sections at Cranfield. Texas Instruments wanted to increase ...
  • Large scale metrology 
    Scarr, A. J. (College of Aeronautics, 19)
    INTRODUCTION It has been recognised in industry that the measurement of large components to high orders of accuracy presents a particularly difficult problem. This fact has been emphasised by a survey carried out by ...
  • Machine tool laboratory: appendix A to progress report no. 2 on the investigation into grinding of nickel chrome alloy EPK31 produced by Henry Wiggins 
    Purcell, J. (College of Aeronautics, 19)
    Introduction The work on the comparative tests of the effectiveness of coolants has continued. A wide range of soluble type coolants and straight oil coolants have been evaluated. The results of these tests are presented in ...
  • A new approach to the mechanics of metal cutting 
    Oxley, P. L. B. (College of Aeronautics, 1964-09)
    Introduction A number of equations have been derived for predicting the shear angle (0 in Fig. 1) in orthogonal metal cutting. The best known of these is due to Merchant (1) who by assuming that the value of shear angle ...
  • Note: estimating the charge size in explosive forming of sheet metal 
    Noble, C. F.; Oxley, P. L. B. (College of Aeronautics, 1964-03)
    Note: Estimating the charge size in explosive forming of sheet metal In the explosive forming of sheet metal some relatively easy method of estimating the size of the charge is needed. This short note describes a method ...
  • Polishing and lapping of silicon discs at Texas Instruments 
    Students of The College of Aeronautics (College of Aeronautics, 1965-05)
    The polishing and lapping of silicon discs at Texas Instruments Ltd. was investigated by a team of students from Cranfield as a project for the Spring Term, January/March 1965. CAD Unfortunately, the process was not ...
  • A preliminary evaluation of a new control-knob design for electronic equipment 
    Andrew, I. D. C.; Ferguson, I.; Talbot, R. J. (College of Aeronautics, 1964-08)
    Two experiments were carried out using five subjects to compare performance using standard and flush fitting rotary controls for electronic equipment. It vas found that the flush knob could be rotated more quickly through ...
  • Preliminary report on the analysis of the stresses in a die-bolster combination 
    Oxley, P. L. B.; Welsh, M. J. M. (College of Aeronautics, 1964-08)
    An analysis is presented of the stresses in a carbide die-steel bolster combination. Results from a computer treatment of this analysis are given in tabular and graphical form. Suggestions are made as to the choice of ...
  • A progress report on the application of numerically controlled grinding to the improvement of the fatigue strength of highly stressed ground gears 
    Purcell, J. (College of Aeronautics, 1963-07)
    During the manufacture at the Bristol Aeroplane Works, of the research Aircraft, Bristol 1880 difficulty was experienced when attempting to grind sheets of stainless steel (spec. REX 443). The size of the sheets was 7 ...

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