Summaries of Chapters 8

        In the chapter 8, some of the best-known methods for the parts of thin-walled sheet-metal’s production have been described. The relationship between the substitute process plans for the stamped part’s production and part attributes has been included as well. Manufacturing issues for the design have been elaborated upon to the stampings’ production have also been listed in the chapter.

        In the beginning, the stamping process has been explained along with the duo of categories that it compromises of concerning the press operations. Before it, it has been told that there are two major categories of the sheet-metal forming which include fabricating before stamping. While stamping is utilized for the development of different parts, fabricating is utilized for the formation of thick or thin-walled parts with the use of compound or single dies without or with the operations of non press. The two categories of stamping include the shearing operations and non-shearing ones like forming. For the production of blanks and features like slots etc., shearing is used. Moving on in the chapter 8, bending and drawing have been explained along with stretch forming which used to shape a bar over the die or a block to mold in a specific shape while keeping it under tension.

        The stamping presses are also elaborated upon in the chapter 8. In all the stamping presses, a bed and a frame, a slide or a ram, for the ram, a drive, a transmission, and a power sources are contained. For the mechanical presses, there are actually two types of basic frames. A C-frame or gap, and straight-sided presses with four posts and closed framed. Process planning has been discussed along with the die construction cost. Engineering cost meanwhile is actually the die-construction cost which includes all the costs involved in the developing of die.

        Strip development has been described in the chapter and it has been told that for the development of a progressive die, the very first step is referred to as the layout of strip or simply the strip layout. In the context of creating the layout of strip, multiple layouts can be utilized for the production of a part. Although other plans can also be used, the final one will rely on the local practice and experience of the stamping vendor utilized for the development of part.

        Since the number of die stations increase with the number of features that are distinct, their number should be kept very low. When it comes to the spacing, the features should not be spaced closely as discussed in the chapter. Narrow projections and narrow cutouts should also be evaded while the bend stages in a specific part should be kept very low. Greater than 90 degrees, the bend angles should be evaded and the same goes for side-action features if not minimum.