Multi-Drive Bending Machine Structure for Screw Load Stability
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Solution Overview
Problem
Existing pure electric servo bending machines face issues with deformation and poor bending accuracy due to eccentric loading and rapid reciprocating radial forces, leading to screw failure and reduced transmission efficiency and service life, especially when dealing with large loads.
Innovation Solution
A multi-drive combined bending machine design incorporating a thrust joint bearing, transmission component, and symmetrically arranged ball screws, which allows the bending component to rotate relative to the connecting member, maintaining the relative position of transmission members during deformation, and utilizing a two-point fixing method to enhance load capacity and precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a screw/nut set is used as the transmission structure, then the bending machine can achieve pure electric servo operation, but the screw is prone to failure due to rapid reciprocating radial forces and deformation
Solution Approach 1:
A radial force bearing component is introduced as an intermediary element between the bending component and the screw transmission mechanism. This bearing component specifically supports and bears the rapid reciprocating radial forces generated during bending operations, preventing these forces from being transmitted to the screw. The mediator isolates the screw from harmful radial loads, allowing the screw transmission system to operate reliably without direct exposure to the damaging forces.
2Manufacturing precision
If the nut is fixed at the force bearing point of the sliding plate, then the transmission structure is compact, but the nut drives the screw to deviate from its theoretical position when the sliding plate deforms, causing poor bending accuracy
Solution Approach 1:
The connection structure is segmented into functionally independent components: the sliding plate, the force bearing point, and the screw fixation point are separated. The screw is fixed at a location that is decoupled from the force bearing point on the sliding plate, creating an independent transmission reference. This segmentation ensures that deformation at the force bearing point does not translate to position deviation of the screw, maintaining both structural compactness and transmission precision.
3Force
If a single screw and servo motor combination is used, then the transmission structure is simple, but it is difficult to apply to occasions with large load due to ball screw load characteristics
Solution Approach 1:
The transmission system merges multiple functional components into an integrated assembly: the screw mechanism, the radial force bearing component, and the bending component are combined into a unified transmission assembly. This merging allows the system to handle large loads by distributing forces across multiple components while maintaining a relatively simple overall structure. The combined design achieves high load capacity without proportionally increasing structural complexity.
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
The design prevents screw failure by maintaining the relative position of transmission components during deformation, enabling precise compensation and doubling the load capacity, thus enhancing the machine's ability to work with numerical control systems and improve bending accuracy.
Implementation Method 1
A thrust joint bearing comprising a spherical sliding surface in order to enable the tilting motion sleeved on the connecting member and rotatable relative to the connecting member is arranged between the mounting member and the bending component
Data Source
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AI summary
The present invention discloses a multi-drive combined bending machine, which includes a bending component, a driving component and a transmission component. Two ends of the transmission component are respectively connected to the bending component and the driving component. The transmission component includes a transmission member and a mounting member arranged on the transmission member. The mounting member is provided with a connecting member fixedly connected thereto at one end, and the connecting member is sleeved with the bending component rotatable relative thereto. A rotating member sleeved on the connecting member and rotatable relative to the connecting member is arranged between the mounting member and the bending component. The bending component is capable of abutting against the rotating member, so as to rotate relative to the connecting member under an applied force.