TABLE OF CONTENTS Considerable knowledge or experience is necessary for completing the bill of material. The bill of material, or BOM, determines the materials from which the various die members are to be constructed. These decisions can influence success or failure of the completed die in operation. The designer must know the names of the various components that make up the die and which materials have proved successful for similar members in previous work. In addition, the die designer must be familiar with standard and purchased components, the sizes in which they are available, and the conventional methods of listing them. Filling in the bill of material column, therefore, is an important element in the preparation of a die drawing and a die designer must become proficient at it.
The bill of material is a list of the following:
Rough sizes of blocks of steel or other materials that will be required for making special components of the die.
Standard parts to be taken from stock.
Parts to be purchased specifically for the job; these are standard components that are not ordinarily carried in stock.
The bill of material, then, is a complete list of every component in the tool or die.
The final step in preparing a die drawing is to fill in the bill of material column. On drawings for many die shops, the bill of material is placed at the upper right corner and is read downward, as shown in Figure 19.1. For others, it...
