Connecting Web Setback for Easy Sheet Part Removal and Edge Machining
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Solution Overview
Problem
Existing methods leave connecting webs, or microjoints, that make it difficult to remove workpiece parts from the remaining grid, especially for sheet thicknesses greater than 2 mm, and prevent edge rounding or chamfering at the microjoint location.
Innovation Solution
The method involves producing a connecting web prior to cutting the workpiece part, squeezing it to reduce thickness, and setting it back towards the workpiece center, allowing for a continuous edge that can be machined, such as rounded or chamfered, by using an edge machining tool.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a connecting web is left in place to fix cut workpiece parts to the remaining grid, then the workpiece parts remain securely attached during cutting, but it becomes very difficult to remove the workpiece parts from the remaining grid by hand, especially with sheet thicknesses greater than 2 mm
Solution Approach 1:
The connecting web's thickness parameter is changed by squeezing it laterally, reducing its thickness from the original sheet thickness to a reduced thickness. This parameter change allows the connecting web to maintain sufficient attachment strength while becoming easy to break and remove.
Solution Approach 2:
The connecting web transitions from a static, thick structure to a dynamic, thin structure through lateral squeezing. This creates a deformable connection that can easily transition from a strong attachment state to a broken, removable state.
2Reliability
If a connecting web extends over the entire workpiece thickness, then it provides secure attachment, but it prevents rounding or chamfering of the edge of the workpiece part at the location of the microjoint
Solution Approach 1:
The connecting web's thickness parameter is reduced through lateral squeezing, creating space for edge machining tools to access and process the workpiece part edges at the microjoint location, while maintaining sufficient attachment strength.
Solution Approach 2:
The connecting web is displaced laterally from the surface toward the center of the workpiece thickness, creating a dimensional change that allows edge machining tools to access the edges without interference from the microjoint.
3Ease of manufacture
If the connecting web is squeezed to reduce thickness and set back towards the workpiece center, then edge machining becomes possible, but additional processing steps are required
Solution Approach 1:
The squeezing operation combines multiple functions: it reduces the connecting web thickness, displaces it laterally toward the center, and creates the necessary space for edge machining, all in a single integrated operation.
Solution Approach 2:
The connecting web is squeezed and set back toward the center before the edge machining operation, preparing the workpiece in advance to allow subsequent edge rounding or chamfering without interference.
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
Enables easy removal of workpiece parts from the remaining grid and allows for subsequent edge machining, even for thicker sheets, by creating a continuous edge that can be rounded or chamfered.
Implementation Method 1
squeezing the connecting web at least on a web section which adjoins the workpiece part which is still to be cut, in the thickness direction of the workpiece, in order to set back the squeezed connecting web relative to at least one of the two plate sides of the workpiece in the direction of the workpiece center
Data Source
AI summary
A method for producing a connecting web with reduced thickness while cutting a workpiece part from a plate-shaped workpiece keeps the cut part attached to a remaining grid of the workpiece by the web. The web is produced prior to cutting the workpiece part, and the web is squeezed on a web section adjoining the part to be cut, in thickness direction of the workpiece to set back the squeezed web relative to a plate side of the workpiece in direction of the workpiece center. A workpiece edge formed by the setback of the squeezed web forms an edge of the part to be cut, and a separating gap, corresponding to the contour of the workpiece part and interrupted along the edge formed by the setback of the squeezed web, is cut into the workpiece, keeping the workpiece part attached to the remaining grid by the squeezed web.