Main Vise Jaw Force Balancing for Curved Workpiece Cutting
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Solution Overview
Problem
Existing cutting machines face issues with clamping workpieces that have curved leading ends, leading to saw blade chipping and reduced blade life due to improper clamping and movement of cut-out products.
Innovation Solution
A workpiece feed/clamp apparatus with a downstream main vise mechanism where the thrust force of the shifting cylinder is equal to the moving cylinder's force, allowing the vise surface to adjust and maintain clamping even when the workpiece curves, preventing product movement and saw blade contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the thrust force of the downstream main shifting cylinder is set larger than the downstream main moving cylinder to position the vise surface at the reference position, then the positioning precision is improved, but the product cutout moves and contacts the saw blade after cutting causing chipping
Solution Approach 1:
The patent changes the parameter of thrust force balance between cylinders. Specifically, it sets the thrust force of the downstream main shifting cylinder equal to the thrust force of the downstream main moving cylinder, rather than making the shifting cylinder's force larger. This parameter change allows the vise surface to remain centered on the workpiece width even when the leading end curves, preventing product movement and saw blade contact while maintaining positioning capability.
2Adaptability or versatility
If the leading end portion of the workpiece curves toward one side in the width direction, then the workpiece shape changes, but the product correspondent portion cannot be clamped firmly and moves after cutting
Solution Approach 1:
The patent applies dynamics by making the vise surface position adaptive rather than fixed. The downstream main shifting cylinder adjusts the vise surface position dynamically based on the actual workpiece shape. When the leading end curves, the system automatically compensates by positioning the vise surface appropriately, maintaining reliable clamping and preventing product movement after cutting.
3Adaptability or versatility
If the leading end portion of the workpiece curves toward the other side in the width direction, then the workpiece shape changes, but the vise surface cannot be located at the reference position and large force is applied to the product
Solution Approach 1:
The patent changes the force balance parameter between the shifting and moving cylinders. By setting their thrust forces equal, the system achieves a balanced state where the vise surface remains centered on the workpiece width regardless of leading end curvature direction. This prevents excessive force from being applied to the product cutout while maintaining adaptability to various workpiece shapes.
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
Enhances the durability of the saw blade by preventing chipping and ensuring stable clamping of curved workpieces, maintaining the product's position post-cutting, and reducing operational disruptions.
Implementation Method 1
a thrust force of the downstream main shifting cylinder (a force for pressing the second downstream main vise jaw) toward the one side in the width direction is set equal to a thrust force of the downstream main moving cylinder
Implementation Method 2
a thrust force of the downstream main shifting cylinder (a force for pressing the second downstream main vise jaw) toward the one side in the width direction is set equal to a thrust force of the downstream main moving cylinder (a force for pressing the first downstream main vise jaw)
Implementation Method 3
a pair of downstream main vise jaws 77 and 79 which face to each other in the width direction and clamp a product correspondent portion Wf of the workpiece W
Data Source
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AI summary
A workpiece feed/clamp apparatus includes a feed vise mechanism provided on an upstream side of a cutting position of a workpiece, and a downstream main vise mechanism provided just on a downstream side of the cutting position. The feed vise mechanism includes first and second feed vise jaws, a downstream main moving cylinder for moving the first feed vise jaw in a width direction, and a downstream main shifting cylinder for shifting the second feed vise jaw in the width direction. The downstream main vise mechanism includes first and second downstream main vise jaws, a downstream main moving cylinder for moving the first downstream main vise jaw in the width direction, and a downstream main shifting cylinder for shifting a second downstream main vise jaw in the width direction. A vise surface of the second downstream main vise jaw is located on one side of the vise reference position in the width direction at a stroke end of the downstream main shifting cylinder on the one side in the width direction. A thrust force of the downstream main shifting cylinder toward the one side in the width direction is made equal to a thrust force of the downstream main moving cylinder toward another side in the width direction.