1. Pinching (Joining Method):
Previous Definition:
Pinching is a useful method of buildings form in clay
on any scale and it is frequently used in the studio or classroom as a first
experience in clay.Objects both hollow and solid can be made by pinching solid
if the cross-section is less than 5cm thick or thicker.If you can fire very
slowly as in brick.
(Peterson J.,Peterson S.,The craft and art of clay,p.32)
(Peterson J.,Peterson S.,The craft and art of clay,p.32)
New Definition (Better):
Different metal, rubber, plastic, or other products
can be mechanically joined to metal strip by inserting them into a groove and
closing the groove opening with rolls. Figure 4.132 shows an automotive part, and
Figure 4.133 shows an air duct joint.
(Halmos, G. T., Roll
Forming Handbook, p. 4-57)
2. Mitering (Punching Operation):
Previous Definition:
To miter each corner,lap one border strip over the
other.(Figure 1) Align the edge of a right triangle with the raw edge of the
top strip so the triangle's long edge intersects the border seam in the
corner.Draw along the triangle edge from the seam out the raw edge.Place the
bottom border unit on top and repeat the marking process.With right sides
together match the marked seam lines and pins.(Figure 2) Begin at the inside
corner and sew the strips together,stitching exactly on marked lines.Check the
right side to see that the corner lies flat.
(Meredith Corp.,123 Quilt,p.15)
(Meredith Corp.,123 Quilt,p.15)
New Definition (Better):
Mitering is a punching or notching operation, which
prepares the ends of the formed profile to fit for at a 90o (or
other) bending assembly (Figure 4.36). This process is applied to make frames
for pictures, windows, doors, and other products.
(Halmos, G.T., Roll
Forming Handbook, p. 4-17)
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