Interlocking Pressing Jaws With Overlapping Press Section
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Solution Overview
Problem
Existing press tongs and press cheeks often experience uneven pressing results, particularly with large opening contours, due to material displacement between ribs during the interlocking process.
Innovation Solution
The integration of a supplementary press section between the ribs of the first and second press cheeks, which forms part of the opening contour and extends across the longitudinal stretch of the ribs, ensuring that the intersection is outside the opening contour.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If ribs of pressing jaws are designed to interlock during pressing operation, then pressing force is improved, but material displacement and uneven pressing results occur
Solution Approach 1:
The harmful intersection point where material displacement occurs is extracted and removed from the pressing area. The opening contour is specifically designed to exclude the intersection point of the ribs, thereby eliminating the source of material displacement while preserving the rib interlocking mechanism for force transmission.
Solution Approach 2:
Different regions of the pressing jaw are given different functions: the ribs are designed to interlock for force transmission, while the opening contour is designed to exclude the intersection point to prevent material displacement. This local differentiation allows simultaneous achievement of high pressing force and uniform pressing results.
2Reliability
If opening contour is formed by rib edges, then pressing effectiveness is improved, but material displacement between ribs occurs
Solution Approach 1:
The harmful effect of material displacement is eliminated by extracting the intersection point from the opening contour. The opening contour is defined solely by the free peripheral edges of the ribs, explicitly excluding the intersection point where material would otherwise be displaced.
3Force
If ribs form intersection point within opening contour, then pressing force is concentrated, but ridge formation occurs
Solution Approach 1:
The intersection point that causes ridge formation is extracted and removed from the opening contour. By defining the opening contour exclusively through the free peripheral edges of the ribs and excluding the intersection point, the source of unwanted ridge formation is eliminated while pressing force is still effectively transmitted through the rib interlocking.
Data Source
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AI summary
The invention relates to pressing jaws (7, 8) intended to be arranged opposite one another in pressing pliers (1), wherein the pressing jaws (7, 8) have ribs (17) with a longitudinal extent (L) transverse to an introduction direction (r) of the pressing jaws (7, 8) into one another, and wherein introduction openings (20) have been left between the ribs (17), into which introduction openings (20) the ribs (17) of the respectively other pressing jaw (7, 8) can be introduced during a pressing operation, wherein, furthermore, a pressing mouth (23) formed by the pressing jaws (7, 8) has a pressing opening (24) with an opening contour (K) formed by free peripheral edges (18) of the ribs (17), and wherein, during a pressing operation, the ribs (17) being introduced form an intersection point (28) of the opening contour (K) that travels in the direction of the longitudinal extent (L). In order to further improve pressing jaws of the type in question, it is proposed that an additional pressing part (29) be provided, which additionally forms a part of the opening contour (K) and is arranged so as to extend overlapping several ribs (17), covering the intersection point (28). The invention also relates to a method for producing a pressed part (25) and to a method for pressing using pressing jaws (7, 8) having ribs (17).