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US 12,420,327 B2Granted
Joint structure for groove-shaped members and joining method for groove-shaped members
AssigneeMatsumoto Industry Co., Ltd.
InventorHao Huang
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AssigneeMatsumoto Industry Co., Ltd.
InventorHao Huang
Estimating the term…
Thermal strain due to welding occurs when long materials having a U-shaped cross section are joined together. The joining work is complicated. To an end portion of a first groove-shaped member having a shape in which side surface portions rise from both ends of a bottom surface portion, that is, a substantially U-shaped cross section, an end portion opposing thereto of a second groove-shaped member having the same shape is fitted. Their bottom surface portions and their side surface portions are kept in close contact with each other. A bottom surface clinched portion is formed on the bottom surface portions in the fitted portions by spot clinching. A pair of edge folding portions are formed on each of the pairs of the side surface portions by hemming bending. Furthermore, a side surface clinched portion is formed on each of the edge folding portions by spot clinching. These three kinds of processing are performed in a single processing step of metal dies. The joining strength is increased and occurrence of thermal strain is eliminated, and efficient joining work can be performed.
A joint structure for groove-shaped members in which a substantially U-shaped cross-sectional first groove-shaped member and second groove-shaped member each including a bottom surface portion and a pair of side surface portions rising from both ends of the bottom surface portion are fitted to each other with the bottom surface portions and the pairs of side surface portions in close contact with each other and are joined, comprising:
A joining method for groove-shaped members comprising:
Dependencies are inferred from the claim text.