Incremental Forming Tool Shank Tip Interface Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing incremental forming tools face challenges in achieving dimensional accuracy due to large shanks interfering with workpieces and a weak tip-to-shank interface, leading to breakage and dimensional inaccuracies.
Innovation Solution
A forming tool with a donut-shaped or multi-sphere forming tip and an interface adapter, where the forming tip diameter is greater than the shank diameter, providing a rigid and adaptable solution that minimizes interference and breakage, allowing for efficient incremental sheet forming without the need for tool changes during the forming process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a large shank is used in the forming tool, then the tool has sufficient stiffness to apply forming forces, but the shank interferes with the workpiece during formation causing dimensional inaccuracies
Solution Approach 1:
The forming tool is divided into distinct functional segments: a large-diameter shank for stiffness, a transition section for geometric continuity, and a small-diameter forming tip for precision work. This segmentation allows each part to optimize its function without compromising the others.
Solution Approach 2:
The tool design transitions from a uniform cylindrical shape to a complex three-dimensional geometry with varying diameters along its length. The transition section creates a smooth geometric progression that maintains structural integrity while reducing the forming tip diameter to avoid workpiece interference.
2Device complexity
If the shank is tapered to meet the round tip, then the tool geometry is simplified, but the tip-to-shank interface becomes the weakest point causing breakage during forming
Solution Approach 1:
The transition section gradually changes the diameter parameter along its length, creating a smooth geometric progression from the large shank diameter to the small tip diameter. This gradual parameter change distributes stress more evenly throughout the transition zone, eliminating stress concentration at sharp corners.
Solution Approach 2:
The tool can be constructed as a composite structure with the forming tip made from high-strength, wear-resistant material and the shank from material optimized for stiffness and fatigue resistance. The transition section serves as a bonded or interference-fit joint between these different material systems.
3Productivity
If a single forming tool is used for multiple passes with different tip diameters, then tool changes are eliminated improving productivity, but the tool design becomes more complex
Solution Approach 1:
The forming tool is designed with multiple donut-shaped tips of different diameters that can be selectively positioned or activated. A single tool body can accommodate multiple tips, allowing the operator to select the appropriate tip diameter for each forming pass without changing the entire tool assembly.
Solution Approach 2:
The tool design allows for dynamic selection or reconfiguration of the active forming tip during the forming process. Multiple tips may be arranged in different spatial configurations, allowing the tool to adapt to different workpiece geometries and forming requirements while maintaining a single tool mounting.
Data Source
AI summary
An tool for the incremental forming of material sheeting is disclosed. The tool comprises a forming tip, a shank, and an interface adapter positioned between the forming tip and the shank. The forming tip has a diameter and the shank has a diameter. The diameter of the forming tip is greater than the diameter of the shank. The forming tip may be of a variety of configurations. The forming tip may be donut-shaped. The donut-shaped tip may have a recessed area formed therein. The recessed area may be frustoconically shaped. As an alternative to the forming tip being donut-shaped, the forming tip may be made up of at least two forming spheres. An adapter is provided to which the spheres may be attached either directly or by arms. The diameters of the spheres may be the same or may be different diameters.