CoA. Memos: Manufacturing and Production (1963-1965)
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Browsing CoA. Memos: Manufacturing and Production (1963-1965) by Author "College of Aeronautics, (Cranfield)"
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Item Open Access Comparison of PERPRO tools grade N5 and N10 against grade N5D and N10D(College of Aeronautics, 1964-02) College of Aeronautics, (Cranfield)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 significant difference in tool life between the normal grades and the 'D’ grades.Item Open Access An investigation of the assembly of transistor cores: first year project 1964/65(College of Aeronautics, 1965-05) College of Aeronautics, (Cranfield)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 production of doUble alloy transistors by 25%. The increase could not be achieved by hiring extra operators because the amount of floor space was limited. The problem facing the group therefore was one of expanding output by increasing the efficiency and productivity of the existing operators ... [cont.].Item Open Access The synthesis of a production information system(College of Aeronautics, 1965-06) College of Aeronautics, (Cranfield)Summary This report outlines a proposed information flow system, capable of giving Management the information necessary to effectively control the Production Organisation of Barretts shoe factory in Northampton. The report specifies the functions of each member of the system and assigns responsibilities to these functions and defines the information required to perform them. The system was designed using the philosophy and techniques of Systems Design.Item Open Access A systems approach to the design of procedures necessary for the organisation of student training flights(College of Aeronautics, 1964-08) College of Aeronautics, (Cranfield)The project was designed to familiarise the group with the use of system design techniques. The objective was to synthesis a system which would be suitable for providing training flights for students at The College of Aeronautics, Cranfield.Item Open Access Test report no. PLBO/10: reducing flank wear by controlled elastic deflection of the tool holder(College of Aeronautics, 1964-04) College of Aeronautics, (Cranfield)Cutting tests were carried out on tips of RD 92, cutting EN9 at 600 fpm, 0.010 in/rev. feed and 0.10 in. depth of cut, with a standard tool holder and with a tool holder which had been modified in such a way as to reduce the contact between the clearance face of the tool tip and the workpiece when the tool holder deflected elastically. The results of the tests showed that up to 0.030 in. flank wear the modified tool holder gave tool lives which were about 20% better than those obtained using the standard tool holder.Item Open Access Test report no. PLBO/11 comparison of PERPRO grade WK8/T0354 against grade CLV when machining Meehanite(College of Aeronautics, 1964-05) College of Aeronautics, (Cranfield)Tools of grade 14K8/T0354 and CLV were tested at 300 f.p.m. cutting speed, 0.10 in. depth of cut and 0.010 in/rev. feed to 0.030 in. flankwear. The two bars of Meehanite used for the tests gave different results but in each case the performance of CLV was slightly better than that of WK8/T0354; this difference was more pronounced with the less easy to machine material.Item Open Access Test report no. PLBO/12: comparison of modified forms of PERPRO carbide grade TO 348 when machining EN 9(College of Aeronautics, 1964-06) College of Aeronautics, (Cranfield)Tools of TO 3)48/ RD60, RD61, RD62, RD63 and Standard were tested to 0.030 in. flankwear when machining EN 9 at 600 fpm with 0.010 in/rev. feed and 0.10 in. depth of cut. The results showed that while no one grade was outstanding RD61, RD62 and RD63 gave an all round better performance than the other two grades.Item Open Access Test report no. PLBO/13: VTn curves for tools of grade SIP, RD107 and RD110 when machining EN9(College of Aeronautics, 1964-08) College of Aeronautics, (Cranfield)Summary Tools of SIP, RD107 and RD110 were tested at 300, 420 and 600 fpm cutting speed with .10 in depth of cut and .010 in/rev feed on EN9 to .030 in flankwear in order to find the constants in the expression VTn = C for the three grades. The values of ‘n’ were found to be .51, .53 and .46 and the values of C to be 4550, 4720 and 3620 for SIP, RD107 and RD110 respectively. It was found that at 600 fpm the crater wear of SIP was about a third of the wear of the other two grades.Item Open Access Test report no. PLBO/15 intermittent cutting tests with tools of RD107, RD110 and SIP, having radiused cutting edges(College of Aeronautics, 1965-01) College of Aeronautics, (Cranfield)Tools of grade S1P„ RD1O7 and RD11O with radiused cutting edges were tested to failure cutting slotted bars of EN9 at 600 f.p.m., 0.010 in/rev. feed and 0.10 in depth of cut. The results showed that there was a reduction in the frequency of early tool failure as compared with unradiused tips. A statistical analysis showed that there was no significant difference between the mean tool lives of the three grades.Item Open Access Test report no. PLBO/15: field tests of PERPRO tips grade RD107 copy turning steel B.S.4(College of Aeronautics, 1964-12) College of Aeronautics, (Cranfield)SUMMARY A batch of 232 Rammer Butt Stems were machined at P. and V. (Mining and Engineering) Ltd., with alternate tips of SIT and RD 107. The results showed that under the same cutting conditions the RD107 gave more pieces per edge than did the S1P. It is suggested that further field trials should be carried out to confirm this result.Item Open Access Test report no. PLBO/17 crater wear of tips grade SIP, RD176, RD110 and RD184 machining EN9(College of Aeronautics, 1965-02) College of Aeronautics, (Cranfield)Tests were carried out with tools of grade S1P„ RD1841 RD110 and RD176 at 600 fpm cutting speed, 0.010 in/rev. feed and 0.10 in. depth of cut machining EN9 to determine their relative resistance to crater wear. The performance of the grades was in the ratio S1P-100, RD184-85„ RD110-56 and RD176-53, although with three out of the four corners tested the performance of RD184 matched that of S1P. During the tests RD184 was the only grade which had an edge radius and it is suggested that further tests should be carried out to determine whether this has any effect on cratering.Item Open Access Test report No. PLBO/3: wear tests on PERPRO tools grades N35/3 and N35/RD25 machining EN 9(College of Aeronautics, 1963-10) College of Aeronautics, (Cranfield)Tools of grade N35/3 and N35/RD25 were tested to .030 in. flankwear at cutting speeds of 500 fpm with 0.010 in/rev feed and 250 fpm. with 0.010 in/rev feed and 0.030 in/rev feed machining EN 9. The results showed that N35/3 gave the better performance at the higher cutting speed and that the two grades gave the same performance at the lower speed. At 250 fpm and 0.010 in/rev feed the wear of both grades was mostly confined to a groove at the depth of cut. With the larger feed both grades of tool suffered severe deformation of the cutting edge.Item Open Access Test report No. PLBO/4: wear tests on PERPRO tools grades N35/RD25 and N35/RD80 machining EN 9(College of Aeronautics, 1963-11) College of Aeronautics, (Cranfield)Tools of grade N35/RD25 and N35/RD80 were tested at 500 fpm cutting speed, 0.010 in/rev feed and 0.10 in. depth of cut on EN 9 to 0.030 in. flankwear. The results showed that there was no significant difference in tool life between the two grades for the cutting conditions investigated.Item Open Access Test report no. PLBO/5: comparative wear tests of PERPRO tools grade N35/RD80 against Sanvik SIP machining EN 9(College of Aeronautics, 1963-11) College of Aeronautics, (Cranfield)Tools of grade N35/RD80 and S1P were tested at 600 fpm cutting speed, 0.010 in.rev. feed and 0.10 in. depth of cut to 0.030 in. flank-wear. The results showed that the grade S1P gave a tool life between six and seven times greater than grade N35/RD80 together with less crater wear.Item Open Access Test report no. PLBO/6: wear tests of PERPRO tools grade CLV, machining meehanite(College of Aeronautics, 1963-12) College of Aeronautics, (Cranfield)Tools of grade CLV were tested at 300 fpm cutting speed, 0.010 in./rev. feed and 0.10 in. depth of cut to 0.030 in. flankwear. The results gave a mean tool life of 37 minutes which should be compared with the results given in Report No. PLB0/1 for grades CLV 403, A, B and C.Item Open Access Test report no. PLBO/7 evaluation of PERPRO tools grade RD 92 machining EN 9(College of Aeronautics, 1963-12) College of Aeronautics, (Cranfield)Four tips of RD 92 were tested at 600 fpm cutting speed, 0.010 in./rev. feed and 0.10 in. depth of cut to 0.030 in. flankwear. Two tips gave a tool life of 56 min., but with severe crater wear. The other two tips gave a shorter life - one failing after 30 min. cutting as a result of the breakdown of the crater lip.Item Open Access Test report no. PLBO/9: comparison of PERPRO tools RD92 against Sanvik S1P under roughing conditions(College of Aeronautics, 1964-04) College of Aeronautics, (Cranfield)Tools of grade RD92 and S1P were tested to 0.030 in. flank wear when machining EN9 at 300 fpm with 0.030 in/rev, feed and 0.10 in. depth of cut. The results showed that while there was no significant difference in tool life between the two grades, RD92 suffered greater crater wear and nose deformation than did S1P.