Roller Hemming Tilt Mechanism for Continuous Bending Angle Control
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Solution Overview
Problem
Existing roller hemming processes require frequent replacement of compaction rollers to accommodate varying bending angles, leading to increased setup time and production man-hours.
Innovation Solution
A roller hemming apparatus and method featuring a receiving body and a roller body with a guide recess and convex curved surface of matching curvature, allowing the roller body to tilt and slide, enabling continuous variation of the bending angle without roller replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the compaction roller is replaced with one of a suitable shape in each bending stage, then the bending angle can be precisely controlled, but the setup time increases and production efficiency decreases
Solution Approach 1:
The compaction roller is designed with a tilting mechanism that allows it to dynamically adjust its tilt angle during the hemming process. This enables the bending angle to be varied continuously from 0 to 90 degrees without replacing the roller, resolving the contradiction between precise bending angle control and reduced setup time
Solution Approach 2:
The invention changes the operational parameter (tilt angle) of the compaction roller rather than replacing the roller itself. By adjusting the tilt angle parameter, different bending angles can be achieved with a single roller, eliminating the need for frequent replacements and reducing setup time
2Manufacturing precision
If the compaction roller is replaced with one of a suitable shape for each region, then the hemming quality can be optimized, but the production man-hours increase
Solution Approach 1:
The tilting compaction roller can dynamically adjust its tilt angle to optimize hemming quality for different regions of the panel workpiece. This eliminates the need for manual roller replacement between regions, thereby improving production efficiency while maintaining hemming quality
Solution Approach 2:
A single compaction roller with tilting capability performs multiple functions that previously required different rollers. It can handle various bending angles and different regions of the workpiece, making the system more versatile and reducing production man-hours
3Adaptability or versatility
If the roller body is designed to tilt and slide with guide recess and convex curved surface, then the bending angle can be continuously varied without roller replacement, but the device complexity increases
Solution Approach 1:
The guide recess and convex curved surface are designed with matching curvatures that guide the tilting motion of the roller body. This curved surface geometry enables smooth, continuous variation of the bending angle while maintaining simple mechanical contact, resolving the contradiction between adaptability and device 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
This solution reduces setup time and production man-hours by allowing continuous variation of the bending angle without needing to replace rollers, enhancing process efficiency and versatility.
Implementation Method 1
either one of the receiving body and the roller body has a guide recess and the other has a convex curved surface that comes into sliding contact with the guide recess
Data Source
AI summary
A roller hemming apparatus includes a receiving body including a receiving member coming into contact with an edge of a panel workpiece, a roller body including a roller member bending a panel flange at the edge of the workpiece toward the receiving member, and a movement unit moving the roller body along the edge and tilts up or down the roller body toward the flange. The roller member hems the flange through the tilting-up operation of the roller body. One of the receiving and roller bodies includes a guide recess and the other includes a convex curved surface coming into sliding contact with the recess. The recess and the surface have a same curvature. The roller body is tilted up to bend the flange or tilted down to move away from the flange around a center of curvature common to the surface and the recess that come into sliding contact.