Servo-Driven Forming Press Subsystems
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Solution Overview
Problem
Conventional die-press forming systems require significant maintenance and suffer from timing and locational inaccuracies due to mechanical components, limiting independent adjustment of stroke distances, dwell times, and production rates.
Innovation Solution
The implementation of independent servo motors and a computerized control system for each component subsystem of the press forming system, allowing for precise electronic control and independent adjustment of the forming process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a single large motor coupled to a bullgear drives the entire press forming apparatus with mechanical systems incorporating gears, belts, timing chains, cams, and mechanical encoders, then the system structure is simplified and easier to manufacture, but timing and locational inaccuracies occur due to stacking of tolerances in mechanical components and the system requires considerable maintenance and adjustment
Solution Approach 1:
The patent divides the press forming system into multiple independent subsystems, each driven by its own servo motor. The blanking die, forming die, and product discharge mechanisms are each controlled by separate actuators, eliminating the need for a single complex mechanical drivetrain. This segmentation allows each component to be precisely controlled independently, achieving accurate timing and positioning without the tolerance stacking problems of mechanical gear systems.
Solution Approach 2:
The patent replaces the mechanical drive system (gears, belts, timing chains, cams) with electronic servo motors and computer control. Each actuator is controlled independently through electronic signals, eliminating mechanical linkages that cause timing inaccuracies. The computer control system coordinates the servo motors to achieve precise synchronization without mechanical coupling, thereby improving timing and locational accuracy while reducing maintenance requirements.
2Adaptability or versatility
If mechanical systems with gears, belts, timing chains, and cams are used to couple the drive motor to various components, then the device complexity is reduced, but independent adjustment of stroke distances, dwell times, and applied pressure is limited due to coupling of components to a common drive motor
Solution Approach 1:
The patent segments the control system into independent control modules for each actuator. Each servo motor controlling a specific die or mechanism can be adjusted independently through the computer control system, allowing separate modification of stroke distances, dwell times, and applied pressure for each component without affecting others. This independent controllability provides high adaptability for process optimization.
Solution Approach 2:
The patent implements dynamic control capabilities where the computer control system can adjust operational parameters in real-time. Each servo motor's parameters (stroke distance, dwell time, pressure) can be dynamically modified during operation to optimize the forming process for different products or conditions, providing versatility and adaptability that fixed mechanical systems cannot achieve.
3Productivity
If attempts are made to increase production rates with shorter cycle times in mechanically linked systems, then productivity increases, but timing and locational inaccuracies are amplified and maintenance requirements increase
Solution Approach 1:
The patent replaces the mechanical drive system with electronic servo motors that can respond much faster and more precisely than mechanical systems. The servo motors can achieve higher speeds and shorter cycle times while maintaining accurate positioning and timing through electronic control, unlike mechanical systems where increased speed amplifies timing errors and wear.
Solution Approach 2:
The patent incorporates feedback control through computer monitoring of each servo motor's position and operation. The control system continuously monitors and adjusts each actuator's movement to maintain precise timing and positioning even at high production rates. This closed-loop feedback ensures that timing and locational accuracy are maintained regardless of cycle time reductions.
Data Source
AI summary
A forming apparatus for producing paperboard pressware includes servo-driven blanking and product forming subsystems, and a computerized control system to provide independent control of the servo-driven subsystems for improved timing and positional accuracy. Independent and individual electronic control of the various component subsystem enables remote control and monitoring of production and machine functions.