T.E. 201

Gear Types External vs. internal gears An external gear is one with the teeth formed on the outer surface of a cylinder or cone. Conversely, an internal gear is one with the teeth formed on the inner surface of a cylinder or cone. For bevel gears, an internal gear is one with the pitch angle exceeding 90 degrees. Internal gears do not cause direction reversal. Gear Design Gear designs vary depen..

Types of Gear

기어란? 두 축 사이에서 힘을 전달할 때 서로 미끄럼이 없이 잘 돌아가도록 원통에 돌기를 붙인 장치이다. 기어에 관한 규격에 기어는 다음과 같이 정의되고 있다. JIS B 0102 "차례차례 서로 무는 이빨에 의해 운동을 전달하는 기계요소의 한 쌍 또는 단체 ASME "Gears are machine elements that transmit motion by means of successively engaging teeth." ISO-R1122 "Any toothed member designed to transmit motion to another one, or receive motion from it, by means of successively engaging teeth." 기어는 시계에 사용되는 것..

http://www.substech.com/dokuwiki/doku.php?id=steel_strip_processing Steel strips are commonly manufactured of continuously cast slabs. Coiled steel strips have the thickness (gauge) up to 0.2” (5 mm). The strips are supplied in different conditions: § Hot rolled § Pickled § Cold rolled § Coated Hot rolling Continuously cast steel slabs are processed in a hot Rolling line: § Heating in a gas/oil ..

http://www.substech.com/dokuwiki/doku.php?id=shot_peening Shot peening is a cold work process, in which the metal part is struck by a stream of small hard spheres (shot) creating numerous overlapped dimples on the part surface. The surface material resists to stretching induced by the shots impacts resulting in a formation of a compressively stressed skin of about 0.01” (0.25 mm) thickness. Glas..

http://www.substech.com/dokuwiki/doku.php?id=rolling Rolling is a process of reduction of the cross-sectional area or shaping a metal piece through the deformation caused by a pair of rotating in opposite directions metal rolls. A scheme of rolling process is shown in the picture: The gap between the rotating rolls is less than the thickness of the entering bar H0 therefore a friction force is n..

http://www.substech.com/dokuwiki/doku.php?id=laser_peening Laser peening is a cold work process, in which the metal part is struck by a high energy pulsed laser beam producing high amplitude stress waves. The surface material resists to stretching induced by the stress waves resulting in a formation of a compression stressed skin. A typical laser system used for laser peening has the following p..

http://www.substech.com/dokuwiki/doku.php?id=forging Forging is a compressive metal forming process, involving shaping a metal piece by hammer, press or rolls. § Hammer forging (drop forging) is forming a preheated workpiece by using impact energy of the falling hammer forcing the metal to fill the space between the punch (a part attached to the hammer) and the forging die (a part attached to th..

Extrusion is a metal forming process involving shaping a metal billet (hot or cold) by forcing it through a die with an opening. The two possible schemes of extrusion are presented in the picture: The metal billet is placed to the container of the extrusion press. The die with an opening is mounted at the end of the container. When the hydraulically driven ram presses the billet, the metal start..

Drawing is a metal forming process involving pulling a workpiece (cold or hot) through a die providing reduction of the cross section of the workpiece. The drawing process employs a series of dies with opening of similar shape and of size which is slightly reduced in each consequent die. As the cross section decreases after passing each die, the length of workpiece increases, requiring correspon..