Modern Toolmaking Methods: A Treatise Om Precision Dividing and Locating Methods, Lapping, Making Forming Tools, Accurate Threading, Bench Lathe Practice, Tools for Precision Measurements, and General Toolmaking Practice (Google eBook) |
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abrasive accuracy accurate adjusted amount angular arbor attachment bench lathe bevel block bored brass bushings button caliper cast iron center hole chamfer chaser chuck circular clamped clearance correct cutting edge cylindrical degrees diamond diamond tool dimension disks dividing head drilled emery end mill equal error face faceplate finished fixture fly cutter formed cutters forming tool gear graduated grinder grinding wheel groove ground hardened holder inch inch in diameter indicator inserted lathe centers lathe faceplate lathe spindle located Machinery Fig master-plate measuring method micrometer milling cutters milling machine number of teeth obtained operation parallel piece pitch placed plane plug gage position radius reamed right angles rough shape sharpening shown in Fig side slot spacing steel straight straightedge surface grinder surface plate tangent taper templet thousandths thread tool toolmakers tooth tooth-rest turned vernier vernier scale vertical width
Brani popolari
Pagina 22 - ... lapped to exactly the same diameter, preferably by mounting them all on an arbor and finishing them at the same time. The ends should also be made square with the cylindrical surface of the button. When these buttons are finished, the diameter is carefully measured and this dimension is subtracted from the diameter of the circle on which the holes are to be located in order to obtain the diameter d. A narrow shoulder is then turned on the plate to be bored, the diameter being made exactly equal...
Pagina 101 - Whenever a circular tool has two or more diameters, the difference in the radii of the steps on the tool will, therefore, not correspond exactly to the difference in the steps on the work.
Pagina 190 - Avoid having a common factor between the number of threads in the hob and the number of flutes; that is, if the worm is double-threaded, the number of gashes should be, say, 7 or 9, rather than 8.
Pagina 281 - ... 50 per cent. Silver solder is especially suitable for jointing monel metal, nickel, and stainless steel, since it gives the necessary whiteness to the seam or joint, whereas with ordinary brazing solder, a red or yellow color is noticeable at the joint. SINE-BAR. — The sine-bar or sine-protractor Is used either for measuring angles accurately or for locating work to a given angle. It consists of an accurate straightedge to which are attached two hardened and ground plugs of the same diameter....
Pagina 281 - ... number of spaces multiplied by 5 will give the number of minutes to be added to the whole number of degrees. The reading of a protractor set as illustrated is 12 whole degrees plus 40 minutes.
Pagina 190 - If it is triple-threaded, the number of gashes should be 7 or 11, rather than 6 or 9. The second requirement is to avoid having a common factor between the number of threads in the hob and the number of teeth in the worm-wheel. For example, if the number of teeth in the wheel is 28, it would be best to have the hob triplethreaded, as 3 is not a factor of 28. Again, if there were to be 36 threads in the worm-gear, it would be preferable to have 5 threads in the hob.
Pagina 69 - A keen cutting tool is clamped in the vise and in this way the lap can he trued as nicely as though it were done in the lathe. In fact, it is superior, for there is absolutely no change in the alignment of the lap with the work spindle after it is turned, which might easily happen should it be turned in the lathe and then mounted in the milling machine spindle. With a perfectly true lap, a perfect contact between the lap and gage is insured for its entire circumferFig.
Pagina 67 - ... steel block. There should be as little rubbing as possible. When the entire surface is apparently charged, clean and examine for bright spots; if any are visible, continue charging until the entire surface has a uniform gray appearance. When the lap is once charged, it should be used without applying more abrasive until it ceases to cut. If A lap is over-charged and an excessive amount of abrasive is used, or more than can be...
Pagina 296 - Delicacy of contact between the measuring faces is obtained by the use of auxiliary jaws holding a small cylindrical gauge by the pressure of a light helical spring which operates the sliding spindle to which one of these auxiliary jaws is attached.
Pagina 209 - ... is thus avoided and greater accuracy is secured between the tapped hole and other machined surfaces. How many taps are generally used in tapping by hand? The taps used for hand-tapping operations are usually made in sets of three, and are known as taper, plug, and bottoming taps or Nos. 1, 2 and 3. The point of the taper tap is turned down to the diameter at the bottom of the thread for a length of three or four threads, and then several threads are chamfered or tapered. The rest of the tap is...
Informazioni bibliografiche
| Titolo | Modern Toolmaking Methods: A Treatise Om Precision Dividing and Locating Methods, Lapping, Making Forming Tools, Accurate Threading, Bench Lathe Practice, Tools for Precision Measurements, and General Toolmaking Practice Volume 5 di Machinery's mechanical library |
| Curatore | Franklin Day Jones |
| Editore | Industrial Press, 1915 |
| Provenienza dell'originale | la University of Wisconsin - Madison |
| Digitalizzato | 8 gen 2008 |
| Lunghezza | 309 pagine |
| Esporta citazione | BiBTeX EndNote RefMan |