Interchangeable Die Transfer Station for Automated Quick Change
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Solution Overview
Problem
Existing joining tool systems face challenges in automating the change of interchangeable dies, as traditional fastening methods weaken the die receiving portion and complicate quick die exchange, while also risking accidental removal of dies after operations.
Innovation Solution
Implementing a rotating device and insert/rotate connection between the interchangeable die and the joining tool, allowing for automated and quick die changes with high axial holding forces, using a rotating device such as a pneumatic cylinder or electromotive drive, and a U-shaped portion for positive locking, along with identification sensors for process control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a transverse bore with grub screw is used to fasten the interchangeable die, then the die can be secured, but the die receiving portion is weakened and automated die change is expensive and complex
Solution Approach 1:
The fastening function is segmented into multiple independent elements: a circumferential groove for radial retention, an axial groove for axial retention, and a rotating device for automated exchange. This segmentation allows each element to perform its specific function efficiently while enabling automated operation.
Solution Approach 2:
The system transitions from static fastening (grub screw in transverse bore) to dynamic fastening where the rotating device actively engages and disengages the die. The rotating device creates dynamic interaction between the die and die receiving portion, enabling automated exchange while maintaining secure fastening during operation.
2Ease of manufacture
If a transverse bore is provided in the die receiving portion, then the die can be fastened, but the structural strength of the die receiving portion is reduced
Solution Approach 1:
The fastening approach moves from a single transverse bore (one-dimensional hole through the structure) to a combination of circumferential and axial grooves (two-dimensional surface features). This dimensional change eliminates the need for a penetrating bore, preserving the structural integrity of the die receiving portion while achieving effective fastening through surface engagement.
3Productivity
If quick change receiving means are provided on the C-frame, then automated die change is enabled, but the system becomes more complex and expensive
Solution Approach 1:
The die itself is equipped with self-contained fastening features (circumferential groove and axial groove) that work with a simple rotating device. The die's own geometry provides the retention mechanism, eliminating the need for complex external quick-change apparatus on the C-frame. The system serves itself through the intrinsic design of the die and its interaction with the minimal rotating mechanism.
4Ease of operation
If conventional fastening methods are used, then the die can be secured, but accidental removal may occur after joining operations
Solution Approach 1:
The system employs dual grooves (circumferential and axial) that create redundant retention mechanisms before any accidental removal can occur. The circumferential groove prevents radial displacement while the axial groove prevents axial displacement, providing beforehand protection against accidental removal in multiple directions simultaneously.
Data Source
AI summary
A transfer station for temporarily storing at least one interchangeable die. The die can be removed by a joining tool to carry out a joining operation and can be returned back into the transfer station after the joining operation. The transfer station including a carriage that is movable between a first position, wherein a first die receptacle is in a standby position, and a second position, wherein a second die receptacle is in the standby position. In the standby position the chosen die receptacle is accessible by the joining tool when in its transfer position.