3D Rod Bending Die With V-Guides for Faster Burr-Free Forming
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Solution Overview
Problem
Existing bending die technologies for forming three-dimensionally bent rod-shaped bodies have complex configurations, leading to difficult operation, longer formation cycles, and potential burr generation due to the need for retraction of moving parts during the bending process.
Innovation Solution
A bending die with a pair of forming dies clamped in the Z direction, featuring semicircular rod-shaped body-forming recesses and V-shaped guide portions that spread outward, allowing for easy operation and quick, reliable bending of rod-shaped bodies in a three-dimensional XYZ direction without interference between guide portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If opening/closing split dies and moving parts (upright wall, core) are used to bend the parison, then the rod-shaped body can be bent in three-dimensional direction, but the device configuration becomes complicated and operation becomes difficult
Solution Approach 1:
The die is divided into multiple independent sections: a fixed die and a movable die that can be separated and repositioned. This segmentation allows the movable die to be positioned at different locations to create various bending trajectories, enabling three-dimensional bending without requiring complex internal mechanisms within each die section.
Solution Approach 2:
The invention introduces the dimension of die repositioning in the lateral direction. By allowing the movable die to be positioned at different lateral locations relative to the fixed die, the system achieves three-dimensional bending capability. The bending trajectory is controlled by the spatial arrangement of die sections rather than by complex movements within a single die.
2Manufacturing precision
If upright wall and core are retracted to allow die closing, then the die can close properly, but the formation cycle is lengthened
Solution Approach 1:
The movable die is positioned in advance at the appropriate location before the closing action begins. This preliminary positioning eliminates the need for retraction movements during the closing phase, allowing the die to close directly onto the parison without generating burrs and without extending the formation cycle.
3Manufacturing precision
If upright wall and core are retracted during closing, then die closing is enabled, but parison position changes causing burr generation
Solution Approach 1:
Instead of retracting the movable die before closing (the conventional approach), the invention inverts the sequence by positioning the movable die in advance at the correct location and then closing directly. This inverted approach eliminates burr generation while simplifying the closing operation, as no retraction movement is required.
4Ease of manufacture
If pressing force is used to extrude parison into lower cavity, then parison can be loaded along bending, but configuration remains simple without core
Solution Approach 1:
The invention introduces a guide portion as an intermediary element between the pressing mechanism and the parison. This guide portion ensures that the parison is correctly positioned and guided into the lower cavity during the pressing process, maintaining manufacturing precision while keeping the overall die configuration simple and without requiring a core.
Data Source
AI summary
An object of the present invention is to provide a bending die that has a simple configuration and is capable of bending a rod-shaped body in a three-dimensional XYZ direction quickly and reliably, the bending die comprising a pair of forming dies clamped in a Z direction, wherein the forming dies have, respectively, rod-shaped body-forming recess portions, and rod-shaped body guide portions for guiding a rod-shaped body to the rod-shaped body-forming recess portions, the rod-shaped body-forming recess portions are each formed into a shape with a semicircular cross section that defines, between the forming dies when clamping the forming dies, a long, cylindrical cavity for forming the rod-shaped body bent in a three-dimensional XYZ direction, and the rod-shaped body guide portions are each formed into a V-shape that spreads outward from both sides of each of the rod-shaped body-forming recess portions having a semicircular cross section.