はとめ加工の基礎的研究 : 第3報,はとめ内縁の拘束の有無が重ね継手の締結特性に及ぼす影響

抄録

To investigate the mechanics of eyelet tab staking, the fastening of a lap joint with lip or petal flanges is carried out for the existence of restraint at the internal edge of an eyelet. The staking modes of the joint unions at different press fitting force are obtained, and results are discussed by use of crushing strength and slipping torque. The fastening characteristics in the eyelet tab staking, which are found to elevate crushing strength by about 5 to 8 %, and slipping torque by about 5 to l0 % were restrained at the internal edge of the eyelet.