Views: 36 Author: Site Editor Publish Time: 2021-04-27 Origin: Site
Custom sheet metal fabrication is unique in various manufacturing processes. The best way to ensure high-quality sheet metal parts is to consult and utilize precision sheet metal fabrication manufacturers like Goldconn with more than 10 years of experience. Goldconn will teach you five skills. By following the following five skills, you can make custom sheet metal parts that are strong and not easy to break.
Holes
Since custom sheet metal fabrication is often used to manufacture housings, brackets and other items, screws, bolts or interlocking parts usually require holes and slots. The punches and dies installed in the press are usually used to create holes in order to cut precise circles from the sheet metal. However, if the hole is not made correctly, the hole may deform or even cause the part itself to break.
Therefore, when punching holes in sheet metal, some important rules should be followed. The distance from the hole to the edge should be 1/8 inch (if the thin metal is thinner than 1/30 inch, it should be 1/16 inch), and the spacing should be at least six times the thickness of the thin metal. In addition, the diameter of all holes and grooves should match or exceed the thickness of the sheet metal.
Hems
Sheet metal may have rough or sharp edges, so "marginating" these edges (folding on itself) is a good way to make sheet metal parts safe and functional. Hemming can also enhance sheet metal parts or perform functional functions, such as accommodating pins for hinges. The hem can be open, closed or drop-shaped.
When adding hemming to custom sheet metal parts, some guidelines should be followed to ensure the best performance. For starters, it is best to avoid closed hems (hems where the material is completely folded) unless absolutely necessary. The closed hemming will have the risk of damaging the material due to the extreme angle of the bending, so it is best to use the open hemming and tear-point hemming (leave a gap between the two sides of the hemming).
When hem, the diameter of the gap should be equal to or exceed the thickness of the sheet metal. The length of the folded edge (the distance for the folded edge to "fold back") should not be less than four times the thickness of the sheet metal. The same guidelines apply to the teardrop hem, and the opening at the end of the return stroke must not be less than 1/4 of the thickness of the metal sheet.
Bends
Bending is one of the most important forming processes in the field of sheet metal processing. By using equipment such as brakes and machine presses, the machine shop can process sheet metal into new shapes. Following certain rules about bending can ensure accurate and uniform bending and reduce the possibility of damaging the material.
One rule to follow is that when designing sheet metal parts with bends, the internal bending radius should match or exceed the thickness of the sheet metal to avoid deformation. In addition, consistency in the bending direction and radius can help reduce costs, because the parts do not have to be reoriented, and the bending equipment can repeat the same process.
Notches
Notches and tabs are functions of sheet metal parts and can be used to add screws or fasteners or slot multiple parts together. A notch is a small indentation on the edge of a part, and a lug is a prominent feature. Usually the lugs in one sheet metal part are incorporated to fit the notches of another part.
Like other sheet metal features, to create suitable notches and lugs, certain rules must be followed. The gaps should be about 1/8 inch apart from each other and should be at least as thick as the sheet metal. The lugs should also be spaced apart from each other-equal to or greater than the thickness of the metal sheet. In addition, the length of the label should be equal to or less than five times its width.
Finishing
Although custom sheet metal parts usually have relatively unremarkable applications, sometimes they still need to go through one or more finishing processes before they are ready for use. Depending on the function and the materials used, custom sheet metal parts can be finished by sandblasting, anodizing, electroplating, powder coating and various other processes to achieve functional purposes or simply improve the appearance of custom sheet metal parts.
