High Speed Sheet Metal Strip Feeding System for Reciprocating Press
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Solution Overview
Problem
Existing sheet metal feeding systems for reciprocating presses fail to achieve high-speed, precise, and vibration-free advancement of thin sheet metal strips, leading to suboptimal production speeds and increased maintenance downtime.
Innovation Solution
A system comprising a frame with pinch and index rolls driven by variable and servo motors, combined with vertical guide members and loop sensors, which forms a continuous vertical loop to precisely control strip advancement, eliminating the need for side guides and allowing quick system removal for maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional sheet metal feeding systems are used, then the press can operate, but the production speed is limited and the strip experiences vibration and whipping during advancement
Solution Approach 1:
The feeding system is divided into separate functional modules: a supply coil assembly, a feeding mechanism with individual rolls, and a press assembly. This segmentation allows each component to be optimized independently and enables the feeding system to be quickly removed for maintenance without affecting the press operation.
Solution Approach 2:
The system pre-forms a U-shaped loop of the metal strip before feeding it into the press. This preliminary loop formation allows the strip to be fed smoothly and continuously, preventing vibration and whipping during the high-speed advancement into the press.
2Ease of repair
If the frame is permanently attached to the press, then structural stability is maintained, but maintenance time and tooling replacement time increase
Solution Approach 1:
The connection between the frame and press is made dynamic rather than static. Quick-connect mechanisms allow the frame to be firmly attached during operation for stability, but quickly disconnected for maintenance, adapting to different operational states.
Solution Approach 2:
The feeding system is designed as a separate, modular frame assembly that can be independently removed from the press. This segmentation enables rapid maintenance and tooling replacement without requiring disassembly of the entire press system.
3Speed
If thin sheet metal strip is fed at high speed, then production efficiency increases, but the strip becomes more prone to vibration and whipping
Solution Approach 1:
The system pre-forms a U-shaped loop of the metal strip before feeding it into the press. This preliminary loop formation allows the strip to be fed smoothly and continuously, preventing vibration and whipping during high-speed advancement.
Solution Approach 2:
Loop sensors detect the position and formation of the strip loop, providing feedback to the variable speed drive to precisely control the feeding rate. This feedback mechanism ensures the strip is fed at the optimal speed to prevent vibration while maintaining high production efficiency.
Data Source
AI summary
A sheet metal strip is directed from a supply coil into a unitized system including a frame supporting a feed roll driven by a variable speed motor. The strip is directed upwardly from the feed roll between vertical guide rods to produce an inverted U-shaped vertical loop detected by sensors connected to control the feed roll motor. A servo driven index roll receives and advances the strip into tooling within a reciprocating press. Vibration insulators support the frame from a base stand mounted on air casters which provide for quickly removing the system from the press. The axial length of each roll is less than the width of the strip and engages only a center portion of the strip. A second index roll driven by a servo motor may be used on the press to provide push/pull advancement of the strip through the press.