Sheet metal bending is one of the most critical and technically
demanding aspects of metal fabrication. The ability to convert flat
patterns into precise three-dimensional forms distinguishes basic
metal shops from true precision manufacturers. This comprehensive
guide explores the world of sheet metal bent parts, addresses the
challenges of complex sheet metal bending, and explains the
benefits of customized sheet metal bending services for your
specific application.
| Material | steel, stainless steel, aluminum,iron, carbon steel,copper, brass,
alloy, etc. |
| Thickness | 0.1mm to 12mm, as your request |
| Sizes | 1) According to customers' drawings
2) According to customers' samples |
| Surface treatment | Anodizing, galvanized, zinc, nickle, chrome plating, powder
coating, painting, etc. |
| Drawing format | DWG, DXF, STEP, STP, STL, AI,PDF, JPG, Draft. |
| Packing | Polybag+Carton box+Wooden case/Pallet, according to customer's
request |
| Shipment | 1) By courier, like DHL, TNT, Fedex, etc, usually 5-7 days to
arrive |
| 2) By air to air port, usually, 3-4 days to arrive |
| 3) By Sea port, usually 15-30 days to arrive |
| Delivery Time | depend on the quantities, usually around 20 days. |
| Payment Term | T/T, Paypal, Trade Assurance |
| Certification | ISO |
| Logo service | provided |
| Application | widely used on construction, industry, automobile industry. |
Bending is a fundamental process in sheet metal fabrication. It
involves applying force between two tools, using a press brake, to
deform a metal workpiece into the desired shape. This process uses
an upper tool (called a punch) and a lower tool (called a V-die).
Bending not only improves the structural integrity of a part but
also redistributes stress by increasing its rigidity. This
technique helps achieve the specific shapes required for certain
applications. For example, creating a curved profile can improve a
part's ability to withstand certain types of loads, thereby
enhancing its performance and durability.
Key Parameters in Sheet Metal Fabrication
Wall Thickness
Sheet metal parts are typically fabricated from a single sheet of
metal and therefore should have uniform wall thickness. Generally,
materials with thicknesses ranging from 0.9mm to 20mm can be
fabricated from sheet (<3mm) or plate (≥3mm), but the specific
tolerance depends primarily on the part's design requirements.
Bend Radius
The minimum bend radius should be at least equal to the sheet
thickness to avoid breakage or deformation of the metal part.
Maintaining the bend in the same plane and direction saves time and
cost by preventing part repositioning. Furthermore, maintaining a
consistent bend radius makes the part more cost-effective.
Bend Allowance
When bending sheet metal, the inner surface of the bend along the
neutral axis will shift. The "k-factor," the ratio of the neutral
axis position (t) to the material thickness (t), is used to
calculate the bend allowance. Using a k-factor chart can help you
calculate the amount of material required to ensure bend accuracy.
K-factor chart
| Radius | Aluminium (Soft) | Aluminium (Medium) | Stainless Steel (Hard) |
| Air bending | | | |
| 0 – t | 0.33 | 0.38 | 0.40 |
| t. – 3*t | 0.40 | 0.43 | 0.45 |
| 3*t. – >3*t. | 0.50 | 0.50 | 0.50 |
| Bottom bending | | | |
| 0 – t. | 0.42 | 0.44 | 0.46 |
| t. – 3*t. | 0.46 | 0.47 | 0.48 |
| 3*t. – >3*t. | 0.50 | 0.50 | 0.50 |
| Coin bending | | | |
| 0 – t. | 0.38 | 0.41 | 0.44 |
| t. – 3*t. | 0.44 | 0.46 | 0.47 |
| 3*t. – >3*t. | 0.50 | 0.50 | 0.50 |
FAQ:
Q: Are you a trading company or a manufacturer?
A: We are a manufacturer and have been in this field for more than
10 years.
Q: What kind of production services do you provide?
A: Mold manufacturing, CNC processing, stamping, assembly and
surface treatment.
Q: What kind of surface finish can you provide?
A: Pulverization, polishing, electroplating, anodizing, hot dip
galvanizing, powder coating etc.
Q: How long is your delivery time?
A: For sample, about 5-7 days. For mass goods, about 12-25 days.
Q: Do you provide samples? Is it free or extra?
A: Yes, we can provide samples free of charge, but we have to pay
the freight cost.
Q: How long should it take us to quote?
A: After receiving the detailed information (your 2D / 3D drawings
or samples), we will quote for you within 2 days.
Q: What is the necessary information for quotation?
A: Please provide the details of your requirements as clearly as
possible (material, surface finish, drawing, tolerance, quantity)
