Variable bore mandrel (VBM) technology has been around for many decades and is a highly versatile metal forming technology with multiple applications and uses. The process is superior to other metal forming techniques in many respects, due to its ability to easily change the bore size of a component without having to go through a complete rework process. This can save considerable time and labor in certain applications and provides maximum efficiency when producing parts.
Variable bore mandrel technology is based on the concept of mandrel forming. This process works by using a tool called a mandrel, which is placed inside the component that is to be formed. The function of the mandrel is to form the component around its outside shape, forming the component to whatever shape and size is desired. However, since the shape of the component is predetermined and molded with the mandrel, the bore or inside diameter of the component cannot be easily changed. This is where the variable bore mandrel (VBM) technology comes in.
Variable bore mandrel technology has a unique feature that allows it to modify and change the bore size of a component without the need to go through a complete rework process. This is done by simply shifting the mandrel position inside the component. This technology allows for quick and easy adjustments in the bore size and is an excellent method for changing the size of components when only very small amount of change is needed.
The VBM process works by careful engineering and dialogue between CAD or 3D CAD drawings and the mold manufacture or tooling shop. Using design and engineering principles, the necessary parameters including bore diameter, wall thickness and draft angles can be determined for each component. Once the parameters are established, the VBM tooling is constructed, which consists of a series of expanders or contracted sleeves. These sleeves are precisely aligned within the VBM, while still allowing the ability to adjust the inner diameter of the component. This can then be used to change the bore size without having to construct a completely new VBM tooling set.
Since the VBM process can adjust very small amounts of material at any one time, there is very minimal material waste generated. This makes it a great choice for processes such as prototype and pre-production parts. Furthermore, the VBM technology is able to make changes to components much faster and easier than traditional methods. This allows for production to be fast-tracked and expedited to meet certain timeline deadlines. It has also been used in the production of components for aerospace, automotive, medical and military applications, where high precision and exact specifications are needed.
Overall, variable bore mandrel (VBM) technology is a great choice for any production process that requires the ability to make quick and minute adjustments to the inner bore size of components. Since it operates with minimal material waste and offers flexibility in design and production, it can provide maximum efficiency when producing parts.
