Punching Tool Guide Bracket for Bow Deflection Alignment
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Solution Overview
Problem
Punching tools used for high-strength sheet metals, especially composite materials, face issues with material deformation and loss of precision due to abrupt compressive stress and high forces, leading to wear and misalignment of the punch and die.
Innovation Solution
A hydraulic punching or riveting tool with a guide decoupled from the bow, using a floating bearing to maintain axial alignment of the punch and die, allowing the bow to deflect without affecting the guide's alignment, and incorporating a guide bracket with adjustable halves and a spring for precise resetting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the bow is used to hold the punch and provide counterholder for the die during punching, then high pressing forces can be generated, but the bow deflects due to elastic properties causing misalignment of punch and die
Solution Approach 1:
The system is divided into two independent functional segments: the bow structure that provides force generation and absorption, and the guide structure that provides precise alignment. The punch and die are decoupled from the bow and mounted on the guide instead, allowing each component to perform its specialized function without compromising the other.
Solution Approach 2:
The guide acts as an intermediary structure between the bow and the punch/die. It transfers the alignment function from the bow to a dedicated component that is not subjected to pressing forces, thereby ensuring precise coaxial alignment while the bow handles the force generation and absorption.
2Device complexity
If the punch and die are directly mounted on the bow, then the structure is simpler, but the pressing force causes bow deflection leading to increased wear and tool degradation
Solution Approach 1:
The punch and die are extracted from the bow structure and mounted on the separate guide structure. This extraction removes the alignment-critical components from the force-subjected bow, preventing wear and degradation at the punch and die edges while maintaining structural simplicity through modular design.
3Volume of moving object
If the guide is integrated with the bow, then the structure is more compact, but the pressing force affects the guide alignment causing punch and die misalignment
Solution Approach 1:
The tool is segmented into force-bearing components (bow) and alignment-bearing components (guide), with clear functional separation. The guide is designed as a distinct structure that carries only the alignment function, isolated from pressing forces, ensuring precise coaxial alignment while maintaining compact overall tool design through efficient spatial arrangement.
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 solution ensures precise alignment and reduced wear of the tool during high-force operations, maintaining the punch and die's coaxial position despite bow deflection, thus improving the precision and longevity of the tool.
Implementation Method 1
the guide comprises the punch and the die and is mounted on the inner side of the bow via a floating bearing
Implementation Method 2
Due to the elastic properties of the material of the bow (Hooke's law), the bow will deflect during the punching
Implementation Method 3
the punch guide may comprise a spring, in particular a compression spring
Data Source
AI summary
A punching or riveting tool, includes a bow with a movable punch and a die. The movable punch and the die are guided in a guide that is decoupled from the bow. The guide may be a guide bracket that is divided into two parts and includes two halves that can be moved relative to one another. The two halves may be coupled to one another via a sliding fit. The die and/or the movable punch may be mounted in a pivotable and/or floating manner relative to a piston or to a counterholder connected to the bow via a clearance fit which comprises a recess and a component engaging in the recess.