headstock

Formula for calculating the expanded diameter of the head: D = 1.2Dg + 2h + δ, where Dg is the inner diameter, h is the height of the straight edges, and δ is the wall thickness.
| Sequence | Item | Symbol | Calculation/Source of Data | Unit |
|----------|------|--------|--------------------------|------|
| 1 | Inner diameter of the head | Dn | Given | mm |
| 2 | Wall thickness of the head | t | Given | mm |
| 3 | Height of the straight edges of the head | h | Given | mm |
| 4 | Diameter at the neutral layer of the head | Dm | Dn + t | mm |
| 7 | Expanded diameter of the head | D | By equal-area method: D = √(1.38*Dm² + 4*Dm*h) mm; by equal-length method: D = 1.213*Dn + 1.5*h; by empirical formula: D = 1.19*Dm + 2*h | mm |
| 8 | Cutting allowance | △ | Determined based on the stamping equipment and process | mm |
| 9 | Diameter of the head blank | D0 | D0 = D + △ | mm |
The standard plate widths are usually 2400, 2200, or 2000 mm; one can calculate accordingly. It’s normal to use multiple plates for equipment where the required diameter is large, but it’s not appropriate to use multiple plates for very small diameters.

It’s not necessary to require the use of whole plates; those with a diameter of 1000 mm or less will suffice. For larger sizes, it’s necessary to consider the material efficiency and plate width.

It’s not necessary to require the use of whole plates; those with a diameter of 1000 mm or less will suffice. For larger sizes, it’s necessary to consider the material efficiency and plate width.

It’s clearly explained on the 2nd floor. For critical equipment, we generally require stamping of the head as a single sheet of material 1400mm or less in size; there are no such restrictions for other equipment

For our company, the requirement is below 800mm; as for the utilization rate of other dashboards, everything mentioned upstairs is excellent.