Polygonal Shaft Forging Without Rotation to Cut Rework
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Solution Overview
Problem
Current methods for producing shafts with non-circular cross-sections, particularly polygonal shapes, in machine construction and automotive technology are complex and costly, as they require extensive mechanical reworking and rotation during radial forging processes.
Innovation Solution
A method involving radial forging of a cylindrical blank where at least one shaft portion is forged without rotation in a final process, allowing for the production of shafts with complex external geometries like polygonal shapes directly, reducing mechanical reworking and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the blank is rotated during radial forging to produce non-circular cross-sections, then the shaft portions can be formed with complex geometries, but extensive mechanical reworking is required and production costs increase
Solution Approach 1:
Instead of rotating the blank during radial forging to create non-circular cross-sections (conventional approach), the invention inverts the approach by forging the shaft portions in the non-rotating state. This allows the forming tools to directly imprint the desired polygonal or non-circular geometry onto the stationary blank, eliminating the need for subsequent mechanical reworking while reducing production complexity and costs
2Shape
If the blank is rotated during radial forging, then shaft portions can be forged with complex external geometries, but the production process becomes more complex and costly
Solution Approach 1:
The invention simplifies the forging process by inverting the conventional approach: instead of rotating the blank and using complex multi-axis tooling to achieve non-circular geometries, the blank remains stationary while simplified forming tools directly create the desired polygonal shapes. This inversion reduces device complexity while maintaining the ability to produce complex external geometries
3Productivity
If the blank is rotated during radial forging, then shaft portions can be formed, but production time and costs increase due to additional reworking steps
Solution Approach 1:
The invention applies preliminary action by directly forming the final non-circular geometry of the shaft portions during the radial forging process itself, without rotation. The forming tools are designed to create the complete polygonal cross-section in a single forging operation, eliminating the need for subsequent mechanical reworking steps and thereby reducing production time and increasing efficiency
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method simplifies the production of shafts with complex geometries, achieving a design close to the final contour while minimizing mechanical reworking and reducing production costs.
Implementation Method 1
radial forging of a cylindrical blank where at least one shaft portion is forged without rotation
Data Source
AI summary
A method for producing a shaft, which is at least partially not circular in cross-section, from a substantially cylindrical blank by means of radial forging, wherein the blank is not rotated in a final radial forging process.