Sheet-Bending Press Tie Rod Framework
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Solution Overview
Problem
Existing sheet-bending presses for making pipes face issues with significant shifting movements and deformation during the bending process, especially when handling narrow sheets, due to the lateral shifting of bending forces and the need for adjusting machine tools.
Innovation Solution
A sheet-bending press design featuring a transversely extending support with slidably positioned benders, tie rods, and actuators, forming a closed framework that minimizes shifting and deformation by maintaining tie rods close to the bending force location, with hydraulic clamps and adjusters for precise positioning and force distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If two separate individual presses are employed to bend the two longitudinal edges of the metal sheet, then the bending of edges can be performed independently, but the workpiece experiences considerable lateral shifting during bending
Solution Approach 1:
The patent combines two separate bending devices into a single integrated press with a common support structure. The first and second bending devices are mounted on the same support, allowing independent bending operations while maintaining fixed relative positions that prevent lateral shifting of the workpiece during the bending process
2Manufacturing precision
If the bending devices are fixed in a fixed frame structure to prevent relative shifting, then workpiece position stability is improved, but the machine deforms significantly when sheet width changes and tools are displaced toward the center
Solution Approach 1:
The patent employs a support structure with adjustable stiffness characteristics. The support can adapt its rigidity based on the operating conditions and sheet width, allowing the bending devices to be displaced toward the center for narrow sheets while maintaining sufficient structural strength to minimize deformation during the bending process
3Adaptability or versatility
If tools are displaced toward the center for narrow sheet widths, then adaptability to different sheet widths is improved, but the machine structure experiences greatest deformation at the center position
Solution Approach 1:
The patent changes the stiffness parameter of the support structure to adapt to different operating conditions. The support is designed with variable stiffness characteristics that provide maximum rigidity when tools are positioned at the center for narrow sheets, while still allowing the necessary displacement for width adjustment. This is achieved through the specific design of the support structure that maintains strength at the center position
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 design prevents relative shifting between bending devices, reduces machine deformation, and allows for adjustable positioning to accommodate varying sheet widths with minimal force flow disruption, ensuring effective bending with reduced machine deformation.
Implementation Method 1
an actuator braced transversely in the direction between the tie rod and the tools and extensible in the direction to tension the rod and press the tools against opposite faces of the sheets at the one edge to deform the one edge
Implementation Method 2
A clamp is engageable between the bender and the support for releasably locking the bender to the support at any of a plurality of positions offset transversely therealong generally parallel to the sheet
Data Source
AI summary
A bending press for making tubing from a substantially planar and longitudinally extending metal sheet has a support extending transversely generally parallel to the sheet vertically offset from the sheet, and a bender at one of the edges of the sheet and slidable transversely generally parallel to the sheet on the support. The bender has a pair of bending tools, a tie rod extending transversely in the direction adjacent the pair of tools, and an actuator braced transversely in the direction between the tie rod and the tools and extensible in the direction to tension the rod and press the tools against opposite faces of the sheets at the one edge to deform the one edge. A clamp is engageable between the bender and the support for releasably locking the bender to the support at any of a plurality of positions offset transversely therealong generally parallel to the sheet.