tailieunhanh - mechanical fixtures

The human species' use of technology began with the conversion of natural resources into simple tools. The prehistorical discovery of the ability to control fire increased the available sources of food and the invention of the wheel helped humans in travelling in and controlling their environment. Recent technological developments, including the printing press, the telephone, and the Internet, have lessened physical barriers to communication and allowed humans to interact freely on a global scale. However, not all technology has been used for peaceful purposes; the development of weapons of ever-increasing destructive power has progressed throughout history, from clubs to nuclear. | CONTENTS Illustrations External . - 1 15 External Equalizing Clamps without Lock .-. 16 35 Externa Equalizing Clamps with Lock . - 36 45 External Pull Down Clamps . . 46-64 External Equalizing Pull Down Clamps . 6 5 84 External Swing Clamps . 85 165 External Equalizing Clamps with Floating Cam . 166 173 Internal Clamps . . 174 213 Internal Pull Down Clamps . 214 240 Internal Equalizing Pull Down Ciamps . . 241-2Ó7 Internal Two-Position Clamps . 268-276 Cam Clamps. . 277 328 Centering . 329 355 Toe Clamps . . 356-393 Clamping in. the Rear . 394 401 Underneath Clamps 7. . . . - 4C2 418 Pusher Clamps 419-459 Knife Clamps. 460-464 - Two Directional Clamping . 465 491 Gombiặaíịon Clamping- .. . 7 .7. -----. -. 49-2 528- Ralslhg the Parts -. . 529 548 Strap Clamps . 549 575 Walking Strap Clamps . . I 576-602 - Wedge Clamps-. . . 603 619 Vacuum Clamplngr - . 620 623 Vise TypeCIamps. . 624 651 Vise. Jaws . 7 . 652 666 Multiple Loading 7T. 667 721 Toggle Link Clamping . 722 747 Collets External . 748 759 Collets Internal . 760 770 792 Chuck Jaws. Í. .- 793 797T Diaphragm 808 Automatic Clamping . 809 877 Jacks. . Ĩ. . 878-900 xtx 1- t Ị I s ĩ. f 4. Answers to Problems in What Is Wrong with This Design Illustration 1388 The cam and the clamp post with its pin could not be assembled. A vertical slot should be provided at the left end of the endmilled groove for the retracting pin. Then the clamp post and its pin may be lowered in the bore to engage the cam. See Illustration 950. Illustration 1389 The cam that raises the right jack post will rotate as the knurled knob is turned. This cam needs a slot for a dog point set screw. See Illustration 91Ó. z Illustration 1390 . t It is not possible to assemble the spring and its button in the shaft nor to drill the hole. - . . The hole should be drilled from the end of the shaft and shown accordingly. The button -- for the spring should-be longer. No airvent has been provided. Illustration .