ROTARY TOOL AND WELDING METHOD

• Main Authors: AOYAMA HIROKA, UTSUMI YOSHIHARU, TSUDA KEIICHI
• Format: Patent
• Language: English; Korean
• Published: 13.03.2017
• Subjects: CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; TRANSPORTING; WELDING; WORKING BY LASER BEAM

마찰 교반 점접합 툴(1)은, 제1 부재와 제2 부재를 중첩시켜 제1 부재측으로부터 압박함으로써, 제1 부재와 제2 부재를 마찰 교반 점접합시키는 것이다. 제1 부재 및 제2 부재는, 각각 인장 강도가 270 ㎫ 이상 370 ㎫ 이하인 강판이다. 마찰 교반 점접합 툴(1)은, 회전축(4)을 중심으로 회전 가능하다. 마찰 교반 점접합 툴(1)은, 선단에 숄더(5)를 구비하는 기둥 형상부(2)와, 숄더(5)로부터 회전축(4)을 연장하는 방향으로 돌출된 원기둥 형상 또는 원뿔대 형상의 프로브(3)를 구비한다. 제2 부재의 두께를 t(㎜)로 하고, 프로브(3)가 압박 시에 제2 부재측에 삽입되는 체적을 제2 부재 삽입 체적 V(㎣)로 할 때, V는 t와의 관계에 있어서 이하의 식 (1) V≥1.73t+5.12t-3.56 (t≥0.5 ㎜) ...(1) 을 만족시킨다. A spot friction welding tool (1) is for performing spot friction welding of a first member and a second member by superposing the first member and the second member and pressing the spot friction welding tool (1) against the first member and the second member from the first member side. Each of the first member and the second member is a steel plate having a tensile strength of not lower than 270 MPa and not higher than 370 MPa. The spot friction welding tool (1) is rotatable around a rotation axis (4). The spot friction welding tool (1) includes a column (2) having a shoulder (5) at a tip end thereof, and a cylindrical or truncated conical probe (3) protruding from the shoulder (5) in a direction of extension of the rotation axis (4). When t (mm) represents a thickness of the second member and a second member insertion volume V (mm 3 ) represents a volume of the probe (3) inserted into the second member at the time of pressing the spot friction welding tool (1) against the first member and the second member, a relationship between V and t satisfies a following equation (1): V ‰¥ 1.73 t 2 + 5.12 t ˆ’ 3.56 t ‰¥ 0.5 mm