Hot-Forming Press with Integrated Cutting Blades
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Solution Overview
Problem
Current hot-forming and press-quenching apparatuses for hardenable steel workpieces require additional processing steps like laser cutting or hard cutting, which are costly and complex, and struggle with maintaining precise tolerances, especially for complex geometries, due to the need for trimming after shaping and hardening.
Innovation Solution
An integrated apparatus for hot-forming, press-quenching, and cutting that includes a die, punch with shaping parts, upper and lower blades, a stationary press plate, and a movable press ram, with a hold-down element and independently movable secondary punches, allowing trimming before final shaping and quenching, ensuring precise cutting and scrap disposal without additional tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If laser cutting is used on hardened components after hot-forming and press-quenching, then precise cutting is achieved, but production time increases and capital costs increase
Solution Approach 1:
The cutting operation is performed preliminarily on the heated workpiece before hot-forming and press-quenching, when the material is still soft and easily cuttable. This eliminates the need for subsequent laser cutting on hardened components, reducing both production time and capital costs while maintaining cutting precision through the integrated apparatus design
2Ease of manufacture
If hard cutting is used on hardened components, then cutting is performed on finished parts, but the production chain is lengthened and tool complexity increases
Solution Approach 1:
The cutting function is merged with the hot-forming apparatus by integrating cutting blades into the die and punch structures. This combination allows cutting to be performed on the heated workpiece within the same apparatus used for forming, eliminating the need for separate hard cutting equipment and reducing overall tool complexity
3Manufacturing precision
If trimming is performed after hot-forming and press-quenching to achieve precise tolerances, then dimensional accuracy is improved, but additional processing steps are required
Solution Approach 1:
Trimming is performed preliminarily on the heated workpiece before hot-forming and press-quenching, when the material is still soft and easily workable. The integrated apparatus allows trimming operations to be completed in the same cycle as forming, eliminating post-processing steps while maintaining dimensional accuracy through coordinated tooling design
4Productivity
If simple geometries are used in direct hot-forming, then trimming can be omitted, but complex geometries require post-processing
Solution Approach 1:
The forming process is segmented into multiple stages within a single integrated apparatus: preliminary trimming, hot-forming, and press-quenching. The die and punch are segmented with integrated cutting blades that can be activated at different stages, allowing the apparatus to handle complex geometries without post-processing by performing all operations in sequence during one heating cycle
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
Enables precise cutting and shaping of complex geometries without the need for post-processing, maintaining high dimensional accuracy and strength while minimizing tool complexity and operational costs, with improved scrap disposal and reduced risk of hydrogen embrittlement.
Implementation Method 1
a semifinished workpiece 2 made of hardenable steel which has been heated above the AC3 point
Implementation Method 2
is pressed into the final shape between two indirectly cooled tools, resulting in a significant change in shape, and while still inside the press is subjected to rapid cooling in such a way that a martensitic and/or bainitic structure is obtained
Implementation Method 3
pressed into the final shape between two indirectly cooled tools
Data Source
AI summary
A semifinished hardenable-steel workpiece is introduced into a gap between a punch tool and a complementary die tool while the workpiece is heated above the AC3 point. Then one of the tools is vertically shifted toward the other tool so as to deform the workpiece to a predetermined shape. Subsequently the workpiece is gripped between the punch and the die tools while cooling at least one of the tools to press-quench the workpiece. Finally, but before the press-quenching is completed, an edge is cut off the still hot workpiece by relatively shifting an upper die and a lower die vertically past each other.