Compression Tool with Inclined Sliding Surfaces for Axial Workpiece Connection
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Solution Overview
Problem
Existing methods for non-detachable connections of workpieces using pressing tools face challenges in applying homogeneous forces, leading to material stress and potential restoration of initial states, particularly due to radial pressing which can disturb symmetry and functionality, and axial pressing tools are cumbersome and space-intensive.
Innovation Solution
A pressing tool with pivoting elements and inclined sliding surfaces within the inner contours of the pressing jaws allows for the conversion of radially inward movement into axial compression, providing a stable and efficient axial pressing mechanism that minimizes material stress and space usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If radial pressing is used to connect workpieces, then the connection can be formed, but the pressing force is inhomogeneous and material symmetry is disturbed
Solution Approach 1:
The patent inverts the conventional radial pressing approach by implementing axial pressing. Instead of applying force radially inward to deform the bead, the pressing tool applies force axially to compress the bead in the axial direction. This inversion resolves the contradiction by providing homogeneous force distribution while maintaining material symmetry, as evidenced by the uniform compression of the annular bead along the axial direction without disturbing the radial symmetry of the connection.
2Manufacturing precision
If increased pressing forces are applied to overcome material inertia, then the desired pressing result can be achieved, but excessive material stress occurs
Solution Approach 1:
The patent changes the pressing parameter from radial force application to axial force application. By compressing the annular bead axially rather than radially, the material inertia is reduced because the axial direction allows for more uniform stress distribution. This parameter change achieves the desired pressing result with lower peak stresses, as the axial compression gradually deforms the bead material without creating the high localized stresses associated with radial pressing.
3Manufacturing precision
If axial pressing tools are used to apply homogeneous force, then force distribution is improved, but the tools are heavy and space-intensive
Solution Approach 1:
The patent segments the pressing function into two distinct components: the pivoting elements that apply radial closing movement, and the inclined sliding surfaces that convert this movement into axial compression. This segmentation allows the use of a compact radial pressing tool structure while achieving axial pressing effects. The tool remains lightweight and space-efficient because it uses the existing radial closing mechanism combined with inclined surfaces, rather than requiring a completely separate axial pressing apparatus.
Solution Approach 2:
The patent employs dimensionality change by using inclined sliding surfaces that convert radial movement (one dimension) into axial compression (another dimension). The inclined surfaces act as mechanical converters, transforming the radial closing action of the pivoting elements into axial pressing forces. This dimensional transformation allows the use of a compact radial tool structure to achieve the benefits of axial pressing, resolving the contradiction between force homogeneity and tool compactness.
4Reliability
If radial pressing is used, then the connection can be formed, but installation space and tool size are increased
Solution Approach 1:
The patent uses another dimension (dimensionality change) by incorporating inclined sliding surfaces that convert the radial closing movement into axial compression. This allows the pressing tool to maintain a compact radial structure while achieving axial pressing effects, thereby reducing the overall installation space required compared to conventional radial pressing tools that require larger opening spaces for bead deformation.
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 approach enables a stable, non-detachable axial connection with reduced material stress and improved tool compactness, maintaining symmetry and functionality while allowing for easy adaptation of existing radial pressing tools to axial pressing.
Implementation Method 1
The dynamics of a radially inward movement can be at least partially converted into a pressing force running in the axial direction due to the sliding surface being inclined relative to the axis of the receiving area
Data Source
Figure 1a~1b
Figure 2a~2b
Figure 3
AI summary
The invention relates to a compression tool (2) for the permanent connection of workpieces (14, 16, 18, 30, 34) having two pivot elements (4), which each have a compression jaw (10), and having at least one rotational axis (6), on which the pivot elements (4) are hinged, wherein the inner contours of the opposing compression jaws (10) form a receiving area (12). The present invention is based on the technical problem of disclosing an alternative compression tool (2), with which a permanent connection can be provided between workpieces (14, 16, 18, 30, 34) by axial compression. The technical problem is solved in that the inner contours have at least one sliding face (2), which is inclined relative to the receiving area axis (20). A compression tool (2) can thus be provided which, starting from a radial inward movement, performs a compression in the axial direction, nonetheless requires little installation space, and offers weight advantages due to a smaller axial extension, for example. Furthermore, the invention relates to an attachment for a compression tool (2) and to a method for the permanent connection of workpieces using a compression tool.