In modern sheet metal fabrication, bending efficiency is closely related to the selection and design of press brake tooling. For relatively simple workpieces, standard punches and dies are generally sufficient to complete the required bending operations efficiently. However, as workpiece geometries become increasingly complex, relying entirely on conventional standard tooling often requires multiple bending operations, frequent tool changes, and repeated repositioning of the workpiece. These additional operations not only increase production time but may also introduce positioning errors, affecting the consistency of the overall manufacturing process.

One-Hit Forming provides a new approach for these applications. Unlike conventional processes that use multiple independent bending operations to form different features, specially designed tooling can integrate specific forming requirements into a single tooling solution. Depending on the geometry of the workpiece, one-hit forming can be applied to U-shaped, R-shaped, hinge, hemming, offset, Z-shaped, and other special forming applications. When the workpiece geometry and machine conditions allow, a purpose-designed tooling solution can complete multiple forming features in a single press stroke.

1. Combine Multiple Forming Features

The implementation of one-hit forming is closely related to the use of custom press brake tooling. Standard tooling is typically manufactured according to general dimensions and conventional bending applications, while custom tooling is designed specifically around the geometry and forming requirements of a particular workpiece. This difference allows designers to consider factors such as bending angles, forming radii, material thickness, flange dimensions, clearances, and forming sequences during the tooling design stage. Therefore, custom tooling is not simply a specially shaped punch or die, but a forming solution developed around specific production requirements.

2. Reduce Tool Changes

For conventional bending processes, a complex workpiece may need to go through several separate operations. The operator may have to change the punch or die between operations and reposition the workpiece before continuing with the next bend. Each additional operation increases handling and setup requirements. When the same component is produced repeatedly, these small time losses can accumulate into a significant impact on production efficiency. Custom tooling can reduce some of these repeated operations by combining suitable forming features into one dedicated tool.

        3. Reduce Workpiece Repositioning

Reducing the need to reposition the workpiece is another important advantage of customized tooling. Accurate positioning is essential for maintaining consistent bending dimensions, especially when a workpiece contains multiple interconnected bending features. Every time a workpiece is removed, rotated, or repositioned, there is a possibility of introducing positioning deviations. When more forming operations can be completed in a single setup, the number of repositioning steps is reduced, making the entire production process simpler and more stable.

The value of customized tooling becomes even more apparent in repetitive production. For small-batch, high-mix processing, standard tooling is generally more versatile and flexible. However, when the same or similar workpieces need to be produced continuously in batches, dedicated customized tooling can often deliver higher production efficiency. In such cases, the investment in customized tooling can be evaluated together with factors such as reduced tool changeover time, simplified operation, shorter processing cycles, and improved production consistency.

However, one-pass forming is not suitable for every complex workpiece. Its feasibility depends on various factors, including the workpiece structure, material properties, sheet thickness, bending radius, forming angle, press brake capacity, tooling design, and production requirements. A comprehensive assessment should be carried out before designing the tooling. In some cases, combining standard tooling with customized tooling can be more economical and practical than using fully dedicated tooling.

The development of one-pass forming also reflects an important trend in modern sheet metal processing: press brake tooling is becoming more closely integrated with the optimization of the overall production process. The role of tooling is no longer limited to performing a single bending operation. Through well-designed tooling structures, it can also influence the number of bending operations, tool changeover time, workpiece handling, repositioning steps, and overall production efficiency. In this direction, GOLIN continues to explore structural innovations and process-oriented solutions for customized press brake tooling, aiming to make tooling not only meet one-pass forming requirements but also integrate more effectively into the overall production workflow, creating greater possibilities for improved efficiency and stability.