Sheet Metal Blank Rounding With Speed-Matched Roller Transfer
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Solution Overview
Problem
Existing methods for rounding sheet metal blanks for container production face challenges in maintaining high throughput speed while preventing edge deformation and damage, leading to incorrect welds and scrap, due to speed differences at transfer points and mechanical sensitivity of thin sheets.
Innovation Solution
Adapting the peripheral speed of transport rollers using a servo motor to match the feed transport speed, reducing impact on sheet metal edges, and optimizing the linear drive for smooth acceleration and deceleration to minimize edge damage, ensuring precise and gentle handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high throughput speed is maintained in the rounding process, then productivity is improved, but edge deformation and damage occur due to speed differences at transfer points
Solution Approach 1:
The patent applies dynamics by making the roller peripheral speed adjustable and variable during operation. The driven rollers can change their rotational speed dynamically to match different material feed rates and thicknesses, allowing the system to maintain high throughput while preventing edge damage through optimized speed matching at transfer points
Solution Approach 2:
The patent changes the operational parameters of the rounding machine by allowing independent adjustment of roller speeds and torques. This enables optimization of the speed difference at transfer points to minimize impact on sheet metal edges while maintaining high productivity, and allows adaptation to different material properties
2Object-affected harmful factors
If the sheet metal blank is fed at lower speed to the roller pair, then edge damage is reduced, but transport time becomes unconstant and productivity decreases
Solution Approach 1:
The system dynamically adjusts the roller peripheral speed to match the feed transport speed at the moment of insertion, eliminating speed mismatches that cause grinding transfer and inconsistent transport time. This dynamic speed matching maintains both edge integrity and transport consistency
Solution Approach 2:
The control system monitors the feed transport speed and adjusts the roller peripheral speed accordingly, creating a feedback loop that ensures consistent transport time while preventing edge damage through optimized speed synchronization
3Productivity
If the leading edge strikes the stop element hard to maintain high speed, then productivity is improved, but the stop element must be spring-loaded and edge damage increases
Solution Approach 1:
The patent optimizes the deceleration parameters by adjusting the roller speed just before the blank reaches the stop element. This controlled deceleration reduces impact force while maintaining overall high transport speed, eliminating the need for spring-loaded stops and preventing edge damage
Data Source
Figure 1~2
AI summary
The invention relates to a method for rounding sheet metal blanks prior to welding on a longitudinal seam welding machine, comprising a controller by means of which the speed upon transferring the sheet metal blank (11) onto a first transport means after being removed from the magazine ensures a slip-free transfer, i.e. the sheet metal blank is transferred from a first to a second transport means at the same speed in each case.