1.1.4 Mechanical Joint: Folding or Clinching

Two pieces of sheet metal can be connected to each other by folding or bending tabs in the form of a buckle and a clamping slot in a folded joint. This assembly method is relatively quick, reliable, economical and convenient.

However, folded metal joints do not seal and may be susceptible to corrosion. These types of joints require a relatively long contact area to provide strength and are not suitable for plastics.

Figure 10 Examples of mechanically folded joints

1.1.5 Mechanical Joint: Press Fit

Press fits, or interference fits, involve an inner component, such as a shaft, forced into an undersized hole. Once assembled, the parts are held together by the friction of the press fit. Press fits require machining to tight tolerances and precise, accurate placement at high force, typically with a hydraulic press.

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