Answer
Mandel yapanze ikoreshwa mukwagura impeta yo hanze kugirango ishobore kunyerera hejuru yumutwe no mumashanyarazi. Diameter nini ya mandrel igomba kuba hafi $ 1 \% $ kugeza $ 2 \% $ binini kuruta diameter ya shaft, naho 'taper' cyangwa inguni igomba kuba idakabije (mubisanzwe $ 10 ^ \ kuzenguruka $ kugeza $ 15 ^ \ kuzenguruka $) kugirango wirinde guhangayikishwa cyane nimpeta. Impeta isunikwa munsi ya mandel ukoresheje plunger cyangwa amaboko. Igishushanyo mbonera cyingenzi ni 'Umubare ntarengwa wo kwaguka.' Impeta ntigomba na rimwe kwagurwa kuburyo indangamuntu irenga $ D_ {ubuntu} + (\ sigma_y D_f ^ 2 / E b) $, aho $ \ sigma_y $ nimbaraga zo gutanga umusaruro. Kurenga iyi mipaka bizatera impeta gufata umurongo uhoraho, bikavamo irekuye neza muri ruhago. Kubiteranya byikora, ubuso bwa mandel bugomba gukomera no guhanagurwa kugirango hagabanuke ubushyamirane no kwirinda gutobora hejuru yimpeta.
