Die Design Fundamentals. Vukota Boljanovic

No. 2. Shear to width (B)

      For narrow strips, lower illustration:

      •Operation No. l. Shear to width (B)

      •Operation No. 2. Shear to length (A)

      4.2.6 Triangular Blanks

      Triangular blanks with an acute angle at each of the three apexes (see Figure 4.7) are produced by splitting a parallelogram.

      For wide strips (Figure 4.7, upper illustration):

      •Operation No. 1. Shear to length (A)

      •Operation No. 2. Shear to double width (B)

      •Operation No. 3. Split (C)

      For narrow strips (Figure 4.7, lower illustration):

      •Operation No. 1. Shear to width (B)

      •Operation No. 2. Shear to double length (A)

      •Operation No. 3. Split (C)

Figure 4.7 Acute-angle triangular blanks made by shearing parallelogram-shaped blanks sheared from wide and narrow strips.

Figure 4.8 Trapezoidal blanks are sheared in a manner similar to acute angle triangular blanks.

      4.2.7 Trapezoidal Blanks

      Large trapezoidal blanks (Figure 4.8) are produced by employing the same method as triangular blanks.

      For wide strips (Figure 4.8, upper illustration):

      •Operation No. 1. Shear to length (A)

      •Operation No. 2. Shear to double width (B)

      •Operation No. 3. Split (C)

      For narrow strips (Figure. 4.8, lower illustration):

      •Operation No. 1. Shear to width (B)

      •Operation No. 2. Shear to double length (A)

      •Operation No. 3. Split (C)

      Added cuts