Press Brake Linking Rods Eliminate Guide Rail Friction
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Solution Overview
Problem
Conventional bending presses face challenges in accurately controlling deformations during metal sheet bending due to high friction and hysteresis in guide rails, leading to inaccuracies and increased maintenance costs.
Innovation Solution
The implementation of linking rods oriented perpendicularly to the movement direction, which are fastened to the deformable portion of the table and the frame, eliminates excessive friction and hysteresis, ensuring high operating precision and reducing maintenance needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If guide rails are used to guide the movable table, then lateral guidance is provided, but friction forces increase and hysteresis occurs leading to positioning inaccuracies
Solution Approach 1:
The patent extracts the guidance function from the traditional guide rail system and implements it through linking rods connected to the deformable portion of the table. This separation allows the guide rails to be eliminated entirely, removing the source of friction and hysteresis while maintaining lateral guidance through the linking rod mechanism that accommodates table deformation.
Solution Approach 2:
The linking rods act as intermediary elements between the frame and the deformable table, providing lateral guidance while accommodating vertical deformation. These rods transmit guidance constraints without creating the high friction contact of traditional guide rails, allowing the table to deform freely in the vertical direction while maintaining positional control laterally.
2Strength
If guide rails with prestress forces are used to create accurate guidance, then rigidity is improved, but friction forces increase and maintenance requirements increase
Solution Approach 1:
The patent removes the guide rail system entirely, eliminating the need for prestressed guide rails and their associated maintenance requirements. The guidance rigidity is maintained through the linking rod mechanism, which provides lateral constraints without the friction and wear problems of traditional guide rails.
Solution Approach 2:
The linking rod system is self-accommodating to the table deformation, automatically adjusting to the deformable portion's movement without requiring external adjustment or maintenance. The system serves itself by allowing free vertical movement while maintaining lateral guidance through the natural geometry of the linking rod connections.
3Manufacturing precision
If slots are provided in the table to control deformations, then bending uniformity is improved, but the table structure complexity increases
Solution Approach 1:
Instead of trying to prevent deformation through rigid structure and guide rails, the patent inverts the approach by accepting and accommodating the deformation through the linking rod mechanism. The linking rods are connected to the deformable portion of the table, allowing the structure to deform as needed while maintaining lateral guidance, thereby simplifying the overall structure.
4Manufacturing precision
If lubrication is applied to guide rails to reduce friction, then positioning accuracy is improved, but maintenance requirements increase
Solution Approach 1:
The patent extracts the lubrication requirement entirely by eliminating the guide rail system that causes friction. The linking rod mechanism provides guidance without sliding contact, removing the need for lubrication and its associated maintenance while maintaining positioning accuracy through the geometric constraints of the linking rod connections.
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 provides precise control over table deformation, reducing inaccuracies and maintenance costs while maintaining high rigidity and flexibility, allowing for consistent bending across the metal sheet.
Implementation Method 1
at least one linking rod, which rod is oriented substantially perpendicularly to the movement direction, having one end that is fastened to the deformable portion of the second table and having its other end fastened to the frame
Implementation Method 2
a deformable portion (112) of the second table (12) that is able to deform in the movement direction
Data Source
AI summary
The present invention relates to a bending press or “press brake” for bending metal sheets, wherein the press includes at least one linking rod, which rod is oriented substantially perpendicularly to the movement direction, having one end that is fastened to the deformable portion of the second table and having its other end fastened to the housing.