As a leading supplier in the field, we specialize in custom metal forming, including our precision sheet metal bending service, heavy plate bending service, plate rolling, and hydraulic pressing. Below, we provide an overview of each of these services:
How does Sheet Metal Bending work?
Our sheet metal bending service involves the precision shaping and bending of thin metal sheets. Using advanced equipment and techniques, we can accurately bend sheets of various metals, such as steel, aluminum, and stainless steel. Our skilled technicians ensure that the bends are precise, consistent, and meet your desired specifications. With our comprehensive sheet metal bending service, we can create a wide range of products, including enclosures, brackets, channels, and more.
Most parts created through our sheet metal bending service are made by overhead bending, bending in the die, and pressing etc. The operation is based on the same principle: the tooling presses the workpiece into the lower die of the concave die.
Overhead Sheet Metal Bending
The tooling presses the metal part into the concave die without pressing it against the die wall. During the downward movement of the tooling, the workpiece edge bends upward and forms a pinch angle. The deeper the tooling presses the metal workpiece into the die, the smaller the angle will be. At this point, there is a gap between the tooling and the die. Overhead bending is also known as a path-dependent process. Each type of clamping angle requires a specific path.
Metal Sheet Bending in the die
The tooling presses the workpiece completely into the die, so there is no gap between the die, the workpiece, and the core. This process is called die closing. The tooling and the die must fit precisely into each other. Therefore, a custom mold is needed for each clamping angle and shape. Once the workpiece is fully pressed in, the tooling cannot move further down. The CNC machine control system continues to increase the punching force until the specified value is reached. The pressure applied to the workpiece rises and results in a contour created by tooling and die. The clamping angle gradually stabilizes due to the high pressure, and completely eliminating the backlash problem.
Overturn Bending
The built-in bending arm of the CNC bending machine consists of a C-shaped profile on which the lower and upper bending dies are mounted. The C-shaped profiles move up or down, or a small range of elliptical movement during the custom metal forming process, that is flip. The semi-automatic swing-arm bending machine is known for its speed and flexibility, which is suitable for small batches custom sheet metal bending service projects. In addition, the overturn bending technique makes it more efficient when bending multiple radius sizes on a single part using the same tool.
Folding and Pressing
The edges of the sheet metal are usually completely bent (e.g., box edges) and folded making it parallel to each other. The finished part is thus more stable forming an edge guard. The folded edges then usually need to be hung with other parts. The folding and pressing are done in two steps: first, the operator pre-folds the 30° angle, re-input the part pressed with the angle. If there is a gap between the edges, it is called a fold. The curved edges are then completely squeezed against each other in the press fit. While folding is path-dependent, pressing is force-dependent.
Understanding K-Factor in Sheet Metal Bending
The K-factor is a critical element in sheet metal design, defining the ratio of the neutral layer position (t) to the overall material thickness (T) of a sheet metal part, expressed as K = t / T. Accurately selecting and applying the K-factor is essential for the precision and performance of parts (like grain buckets , enclosure, cabinet, metal housing parts, etc) produced by our sheet metal bending service.
Importance in Sheet Metal Bending Service
In the context of our sheet metal bending service, the K-factor ensures that designs are accurately translated into precise, high-quality parts. It varies with material type and thickness, influencing the bend allowance calculations necessary for successful fabrication.
K-Factor Variation with Material Thickness
For steel materials of varying thicknesses, an appropriate K-factor ensures design accuracy and bending stability. Thicker steel plates (2.0mm to 4.0mm) have a lower K-factor, positioning the neutral axis closer to the material’s center and requiring less bend deduction. Conversely, thinner plates (0.8mm to 1.2mm) have a higher K-factor, with the neutral axis closer to the surface, necessitating greater deductions to prevent overbending.
Practical Application in Design
Designers are advised to utilize charts or tables for quick reference of K-factor values corresponding to different material thicknesses. Adjusting deductions based on the actual bending process, angle, tool selection, and material properties is crucial. While standard calculation methods suggest a K-factor of 1.66 times the material thickness, adjustments may be necessary for specific applications in our sheet metal bending service.
Recommended K-Factor Values
To enhance design quality and production efficiency in our sheet metal bending service, consider the following K-factor recommendations:
Soft copper or similar materials: K = 0.35
Semi-hard copper, brass, soft steel, and aluminum: K = 0.41
Bronze, hard copper, cold-rolled steel, and spring steel: K = 0.45
By integrating these considerations into the design phase, we optimize the sheet metal bending process, reduce waste, and achieve cost-effective production outcomes.
K-Factor Table for Reference
| K FACTOR | |
| Thickness | K Factor Values |
| galvanized plate and cold -rolled steel plate | All Angles, incl. R-angles |
| 0.8 | 0.615 |
| 1.0 | 0.455 |
| 1.2 | 0.350 |
| 1.5 | 0.348 |
| 2.0 | 0.455 |
| 3.0 | 0.349 |
| 4.0 | 0.296 |
| BENDING DEDUCTION | |
| Thickness | Bending deduction |
| galvanized plate and cold -rolled steel plate | only for 90° angle |
| 0.8 | 1.0 |
| 1.0 | 1.5 |
| 1.2 | 2.0 |
| 1.5 | 2.5 |
| 2.0 | 3.0 |
| 3.0 | 5.0 |
| 4.0 | 7.0 |
| 5.0 | 10.0 |
Sheet Metal Bending Services at Atimei Industries
Precision Bending with Trumpf TruBend Machines
At Artisan Metal Industries, our sheet metal bending services are synonymous with precision and quality. We achieve this through our investment in advanced technology, featuring a fleet of 8 Trumpf TruBend machines, including the renowned TruBend 5230 and TruBend 5170 models. These machines empower us to handle diverse bending projects with exceptional accuracy and efficiency.
Showcasing our factory’s state-of-the-art equipment – the Trumpf TruBend 5230 precision sheet metal bending machine.
The TRUMPF Precision Bending Machine, a key fixture in delivering unparalleled sheet metal bending services in our workshop.
The TRUMPF TruBend 1100, an integral part of our sheet metal bending service — exacting precision, superior results.Unmatched Accuracy and Repeatability
Trumpf’s innovative features, such as the ACB Wireless angle measuring system, ensure unmatched accuracy and repeatability in every bend. This commitment to precision guarantees that your parts meet the most stringent specifications, regardless of complexity. Additionally, the 6-axis backgauge systems provide flexible positioning and support for various part geometries, further enhancing our sheet metal bending services.
Versatility Across Materials and Bending Techniques
We offer comprehensive sheet metal bending services across a wide range of materials, including Aluminum, Copper, Stainless Steel, and Titanium. Our expertise extends to various bending techniques, accommodating simple folds, complex curves, and tight-tolerance bends. Whatever your project demands, we have the knowledge and equipment to deliver exceptional results.
Beyond Bending: A Complete Fabrication Solution
Our capabilities extend beyond bending, encompassing a complete suite of sheet metal fabrication services. From laser cutting and punching to welding and assembly, we provide a one-stop solution for your project needs. Our experienced team is dedicated to guiding you through every step of the fabrication process, ensuring a seamless and successful outcome.
Your Partner for Sheet Metal Bending Excellence
With our cutting-edge Trumpf TruBend technology and dedication to quality, we are your trusted partner for all your sheet metal bending needs. Contact us today to discuss your project requirements and discover how we can bring your vision to life with precision and expertise.
Why choose Atimei for your upcoming sheet metal bending needs
Two Decades of Expertise
Our sheet metal bending service is bolstered by an experienced technician support team with over 20 years in the field. This seasoned expertise translates into outstanding craftsmanship and wisdom in the sheet metal bending industry.
Design Optimization
Our technicians don’t just work with your designs; they enhance them. We’re adept at refining your blueprints to maximize efficiency and cost-effectiveness, ensuring your products not only meet but exceed expectations.
Transparent, Reliable Service
Reliability is at the core of what we do. We keep you informed with frequent updates on the production timeline and detailed progress reports. Stay in complete control with the ability to monitor your project’s advancement in real-time.
Unwavering Quality Assurance
We pledge unwavering attention to detail in our quality checks. Each product passes through a strict inspection process, covering everything from measurement precision to aesthetic scrutiny. We provide comprehensive visual materials and inspection reports for your peace of mind, ensuring only perfect products make it to delivery.
