Divisible Press Frame Structure With Reduced Vertical Deflection
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Solution Overview
Problem
Conventional press frames face challenges in absorbing dynamic and static forces efficiently, leading to increased material and assembly costs, complex logistics, and reduced fatigue strength due to the use of tie rods, which also result in higher elastic deformation and stress on components.
Innovation Solution
A press frame system with side stands that are optimally determinable in length and attached to cross connections using non-positive or positive joining geometries without tie rods, allowing for symmetrical deformation under operating forces, thereby reducing vertical spring and material usage, and incorporating a control and regulation device for active bracing of stiffness-relevant cross-sections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If tie rods are used to brace side supports against cross connections, then the press frame can withstand complex forces and prevent loss of preload, but the vertical springback increases and material costs rise
Solution Approach 1:
The patent removes tie rods from the press frame structure entirely. Instead of using separate bracing elements to prevent head piece lifting, the invention integrates the bracing function directly into the side supports through optimized joining geometries and force-fit connections between side supports and cross connections
Solution Approach 2:
The side supports are designed with differentiated cross-sectional areas and optimized material distribution at specific locations. The joining geometries between side supports and cross connections are locally optimized to provide precise positional accuracy and minimal springback without requiring additional tie rod elements
2Force
If tie rods are used to brace the press frame, then static load resistance improves, but device complexity and assembly logistics become more difficult
Solution Approach 1:
The patent combines the functions of side supports and bracing elements into a single integrated component. The side supports directly provide both vertical load bearing and lateral bracing through their joining geometries with cross connections, eliminating the need for separate tie rod assemblies and reducing overall device complexity
Solution Approach 2:
The press frame is divided into modular components (side supports, cross connections, head piece) with standardized joining geometries. This segmentation allows for simplified assembly logistics where components can be manufactured and transported separately, then quickly assembled without complex tie rod installation procedures
3Reliability
If conventional press frames are designed with tie rods, then fatigue strength is reduced due to stress concentration, but material usage increases
Solution Approach 1:
The side supports feature differentiated cross-sectional areas with optimized material distribution. Material is concentrated at critical stress zones (joining areas with cross connections) and reduced in non-critical areas, providing high fatigue strength where needed while minimizing overall material usage
Solution Approach 2:
The invention employs optimized material selection and composite construction in the side supports, combining materials and structural configurations that maximize fatigue resistance per unit of material. The integrated design creates a composite structure where the side support and joining geometry work together as a unified load-bearing element
Data Source
Figure 1a
Figure 1b
Figure 2~3
AI summary
The invention relates to a system of a divisible frame for pressing and correspondingly realized press frames, wherein each press frame comprises side posts and a head piece as an upper cross-connection and a press table as a lower cross-connection, which, as structural units, form a closed frame, absorbing static and dynamic forces, for any required functions of a press, such as driving a plunger for forming by means of tools. The proposed press frames have a reduced vertical deflection compared to press frames joined by means of tension rod bracing.