S. A. Tobias's Advances in Machine Tool Design and Research 1969. PDF

By S. A. Tobias

ISBN-10: 0080156614

ISBN-13: 9780080156613

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Read Online or Download Advances in Machine Tool Design and Research 1969. Proceedings of the 10th International M.T.D.R. Conference, University of Manchester Institute of Science and Technology, September 1969 PDF

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Additional info for Advances in Machine Tool Design and Research 1969. Proceedings of the 10th International M.T.D.R. Conference, University of Manchester Institute of Science and Technology, September 1969

Example text

Some numerical values of this function are given in Table 1 TABLE 1 H Lib 01 0-2 0-3 0-4 0-5 0-6 0-7 0-8 0-9 0000931 0006979 00218 00478 00856 0135 01948 j 0-2636 0-3396 Lib H 1 1-2 1-4 1-6 1-8 2 2-5 3 4 0-4277 0-5976 0-7844 0-9772 11730 1-3707 1-8684 2-3659 3-3639 For cylindrical dampers: (a) pure axial flow: H=-(Llbf (b) pure tangential flow: 3TT H=-(Llb) \L/b 5 6 7 8 10 12 14 16 20 H 4-3534 5-3487 6-3291 7-3208 9-2660 111806 131514 150506 18-5321 62 PROF. IR. J. PETERS and P. VANHERCK (c) free flow axially and tangentially: 3TT H = Hi = — (f- tan/ ^) IL L\ 7 — tan h Numerical values for the function H\ (Table 2).

This particularly applies to way bearings, journal bearings and feed drive mechanisms. Some aspects and problems in this connection are considered in this paper. Some important factors are friction, backlash and stiffness. ROLF UMBACH and W. HAFERKORN FIG. 36a. Bearing arrangement on the face plate of a disc lathe. Implementation of Modern Design Features on Large Size Machine Tools 33 FIG. 36b. Photo of the face plate of a disc lathe. Some consideration is given to conventional ways, which will still be found in the future.

The advantages are obvious, no material-to-material contact occurs, and thus no wear. The full load can be supported by the oil film when there is no movement. The friction force is determined only by shear forces within the oil and the land area in the ways. Several examples demonstrate the advantages, and the difficulties as well. In this respect it can be said that not only is some calculation work required by the design office, but also some expense is necessary in machining the ways. In one example it is demonstrated that in the longitudinal direction of a table there is no damping, which is a disadvantage in one respect.

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Advances in Machine Tool Design and Research 1969. Proceedings of the 10th International M.T.D.R. Conference, University of Manchester Institute of Science and Technology, September 1969 by S. A. Tobias


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