Multi-Link Servo Bending Machine With Adjustable Transmission Ratio
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Solution Overview
Problem
Current numerical control bending machines face challenges with hydraulic drive systems, including high noise, energy consumption, environmental pollution, high costs, low precision, short service life, and limited suitability for large tonnage applications, while mechanical electric servo drive systems are costly and have low power utilization ratios due to fixed transmission ratios.
Innovation Solution
A torsion shaft structure based multi-link all-electric servo synchronous bending machine with adjustable transmission ratio, utilizing a power assembly, screw, nut, and link mechanisms to achieve nonlinear motion, allowing for high speed and low load in fast downward stages and low speed and high load in machining stages, thereby improving power utilization and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If hydraulic drive mode is used, then large tonnage and ease of bending large breadth and thick plate are achieved, but high noise, high energy consumption, hydraulic oil leakage and environmental pollution occur
Solution Approach 1:
The patent replaces the hydraulic drive system with a mechanical electric servo drive system. The servo motor drives the ball screw to convert rotational motion into linear motion of the slider, eliminating hydraulic oil and associated pollution while maintaining the required tonnage capability through the ball screw's mechanical advantage
Solution Approach 2:
The patent changes the drive mode from hydraulic to mechanical electric servo, fundamentally altering the system's operating parameters. The servo motor provides precise control of the slider's position and speed, enabling the same tonnage output without the harmful side effects of hydraulic systems
2Force
If hydraulic drive mode is used, then large tonnage is achieved, but high cost due to high precision components such as hydraulic ram, valve group, hydraulic pump is incurred
Solution Approach 1:
The patent substitutes expensive hydraulic components (hydraulic ram, valve group, hydraulic pump) with a more cost-effective mechanical electric servo system. The servo motor combined with ball screw transmission provides the necessary force multiplication at a lower overall system cost, particularly eliminating the need for high-precision hydraulic components
Solution Approach 2:
The patent changes the drive system architecture from hydraulic to mechanical electric servo, fundamentally altering cost parameters. The servo motor and ball screw combination achieves the required tonnage capability with lower component costs and reduced dependency on imported high-end hydraulic parts
3Force
If hydraulic drive mode is used, then large tonnage is achieved, but low precision and poor position controllability occur
Solution Approach 1:
The patent replaces the hydraulic drive system with a mechanical electric servo drive system that inherently provides superior position control. The servo motor's closed-loop control and the ball screw's high mechanical precision enable accurate positioning of the slider, achieving both large tonnage and high precision simultaneously
Solution Approach 2:
The patent changes the control mechanism from hydraulic pressure control to electronic servo control with feedback. The servo motor receives precise position commands and uses feedback to maintain accurate slider positioning, fundamentally improving manufacturing precision while maintaining the required tonnage capability
4Manufacturing precision
If mechanical electric servo drive mode is used, then high precision and high speed are achieved, but low power utilization ratio occurs due to fixed transmission ratio
Solution Approach 1:
The patent introduces a variable transmission ratio mechanism that dynamically adjusts the transmission ratio during different stages of the bending cycle. During fast downward movement, a lower transmission ratio provides higher speed; during machining, a higher transmission ratio provides greater force, optimizing power utilization across all operating conditions
Solution Approach 2:
The patent changes the transmission ratio from fixed to variable, allowing the system to adapt its mechanical characteristics to different operational requirements. This parameter change enables the servo motor to operate more efficiently across the full range of speeds and loads encountered during bending operations
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 solution enhances power utilization, reduces manufacturing costs, and enables the development of large tonnage mechanical electric servo bending machines with improved precision and reliability, overcoming the limitations of traditional hydraulic and mechanical electric servo drive systems.
Implementation Method 1
a screw (5) coaxially connected to the big belt wheel (17), and a nut (6) threaded on the screw (5); the power assembly (15) drives the big belt wheel (17) to rotate through a synchronous belt transmission mechanism, thereby driving the nut (6) to move
Implementation Method 2
a first crank (8) with one end hingedly connected to the nut (6) and the other end fixedly connected to one end of the torsion shaft (7), and a second crank (10) with one end fixedly connected to the other end of the torsion shaft (7)
Data Source
AI summary
A torsion shaft structure based multi-link all-electric servo synchronous bending machine, comprising a machine frame, a lower die fixedly connected to the machine frame and used for bending, a slider capable of moving up and down along the machine frame, and an upper die fixedly connected to the slider and cooperating with the lower die to perform bending, wherein the slider is left-right symmetrically connected to drive mechanisms for driving the slider to realize a transmission ratio adjustable motion.