tailieunhanh - Mechanical Movement 3

Tham khảo tài liệu 'mechanical movement 3', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | ìOSí ì 03 ì 04 ÌU 2 . Ỉ05 106 107 ỉ 08 J 109 110 Mechanical Movements. 31 102. Common screw bolt and nut rec- in every revolution. A point inserted in the tilinear motion obtained from circular mo- groove will traverse the cylinder from end tion. to end. 103. Rectilinear motion of slide produced . r . 109. The rotation of the screw at the left- by the rotation of screw. I hand side produces a uniform rectilinear movement of a cutter which cuts another 104. In this rotary motion is imparted to screw thread. The pitch of the screw to be the wheel by the rotation of the screw or cut may be varied by changing the sizes of rectilinear motion of the slide by the rota- the wheels at the end of the frame. tion of the wheel. Used in screw-cutting Ị and slide-lathes. __ __ r . no. Uniform circular into uniform recti- linear motion used in spooling-frames for 105. Screw stamping-press. Rectilinear _ . . . _ . . leading or guiding the thread on to the motion from circular motion. _. spools. 1 he roller is divided into two parts. each having a fine screw thread cut upon it. 106 and 107. Uniform reciprocating rec- one a right and the other a left hand screw tilinear motion produced by rotary motion The spindle ọarallel with the ro ler has arms of grooved cams. I which carry two half-nuts fitted to the I screws one over and the other under the 108. Uniformreciprocatingrectilinearmo- roller. When one half-nut is in. the other tion from uniform rotary motion of a cylin- is out of gear. By pressing the lever to the der in which are cut reverse threads or right or left the rod is made to traverse in grooves which necessarily intersect twice either direction. 3-2 Mechanical Movements. 112 114 117 115 116 .