How is the accurate cutting dimension of the cylinder body calculated?

The diameter is enough, why do you need to cut it after rolling it? Cut it first and then roll it?

When expanding using the medium economy method, are sheet defects not taken into account? Groove machining allowance, huh

Of course not! Mid-diameter expanded perimeter + 5–10 mm margin

Define two dimensions: the net dimension and the dimension including the machining allowance.

It’s a problem with the technology and equipment. The board defects you mentioned should refer to the edges and corners rather than the surface. It is recommended that you become familiar with the different types of sheets, and also consult with the supplier regarding edge-aligned and edged-processed steel plates. At the same specifications, the prices of these two options are similar to those of tablets, but they can reduce a significant amount of processing work. Of course, the issue of kickbacks for substandard procurement quality is a management problem and is not taken into consideration. Previously, edge trimming was considered necessary because the continuous casting process did not meet the required standards; however, over the past decade, steel mills in China have become much more advanced, and such defects no longer occur. (Suppliers that do not meet the requirements for contract review, and as a result purchase substandard products, represent a management issue.) Additionally, experienced sheet rolling operators can basically ignore the issue of margin when using three-axis or four-axis sheet rolling machines; this is a matter of experience. As for the groove allowance, it’s better to ask the riveter; it’s not really a problem, as the longitudinal seam where the sheets are joined can be adjusted. There is already a range of tolerance for rolled sheets, and you can also include that allowance in the calculation. Design is a comprehensive endeavor; relying solely on standards and mere imagination makes it difficult to progress further. Spend more time in the workshop and interact with experienced craftsmen – there’s a lot of knowledge involved that can’t be found in books. Keep it up, brother.

This post was last edited by wanlirn on 2021-9-26 at 16:43. What on earth is the allowance for cutting? It’s completely unnecessary; simply using the mean diameter is sufficient. The issue of the bending neutral axis offset only needs to be considered for materials with a larger thickness and smaller diameter, such as those with a diameter of 1200 and a thickness of over 100

Under normal circumstances, we use the mean diameter; sometimes, taking into account the misalignment with the end cap, we first measure the outer diameter of the end cap and then determine the material required for the cylinder body