[請益] upsetting process

[crazybox99 (鳥沈)]

figure 1 shows a plane-strain upsetting process. The process may also be
thought of as a form of side extrusion. It is reasonalbe to assume that the
deformation zone is analogous to plane-strain cutting. Based on this analogy
and assuming the deformation zones to be a shear planes(s), calculate the
pressure(p) required for the upsetting process of figure 1.
You may assume that there is no friction between the work material and the
tool/die walls; the uniaxial yield strength of the material is σy and
is independent of strain rate and tenperature; and the material behaves as
a rigid plastic solid.



圖如下(沒毒放心)
http://ppt.cc/8V!r
小弟不知如何下手，他又說是類似cutting的問題 但又upsetting process
他圖中的die又比workpiece小而且沒有原始的size 真不知如何下手
也不知他的process是如何進行

拜託各位大大解惑阿





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推 wgst88w:應該是冷鐓成形，我認為胚料是「凸」這形狀，因為他說跟模
→ wgst88w:壁沒有摩擦力，而剪斷應該是利用模壁的底刃去切的，所以成
→ wgst88w:品應該是個「口」的矩形，成形後還要注意它的yield stren-
→ wgst88w:ght.很好奇它胚料的component是哪些。
推 wgst88w:這樣說好了，胚料﹝凸(側看)﹞要用多少的(P)，使其能達到
→ wgst88w:平面應變﹝口(側看)﹞。
→ crazybox99:我感覺到了 應該是w大所說的這樣 謝了