Replaceable Die Locking With Axial Insertion and Ejection
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Solution Overview
Problem
Existing matrix changers in the production of motor vehicles face challenges with flexibility, susceptibility to interference, and durability, particularly in the locking and identification mechanisms, leading to damage and reduced lifespan due to complex movement sequences and contamination issues.
Innovation Solution
A matrix changer system with a matrix dome and shaft featuring radial webs for secure axial locking, an ejection surface for rotation-free insertion and removal, and a protected matrix encoding system using a radial taper and adjustable puncture for identification, allowing for axial movement and reduced rotational dependencies, enhancing durability and maintenance simplicity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a rotatable die plate arrangement is used to enable die changes, then flexibility in adapting to different joining joints is improved, but the complexity of the locking and unlocking mechanism increases
Solution Approach 1:
The die plate is segmented into a modular structure with a die holder and a die shaft, allowing independent movement and locking of components. This segmentation simplifies the overall locking mechanism by breaking down the complex rotatable arrangement into manageable segments that can be locked and unlocked more easily.
Solution Approach 2:
Instead of rotating the entire die plate to change dies, the invention inverts the approach by allowing the die shaft to move axially in and out of the die dome while the die holder remains stationary. This inversion eliminates the need for complex rotational locking mechanisms and simplifies the die change process.
2Reliability
If a bayonet-like connection with rotational movement is used to lock the die, then secure locking is achieved, but susceptibility to contamination and damage increases
Solution Approach 1:
The invention extracts the rotational movement from the locking mechanism, eliminating the bayonet-like connection that causes contamination issues. The die shaft is taken out of the die dome through simple axial movement rather than rotational engagement, removing the source of contamination susceptibility while maintaining secure locking through the axial positioning system.
Solution Approach 2:
The complex rotational mechanical locking system is replaced with a simpler axial positioning system. The securing mechanism uses axial forces and positioning features rather than rotational engagement, substituting a contamination-prone mechanical system with a cleaner, more reliable axial movement system.
3Reliability
If precise matching of insertion depth and rotation angle is required, then reliable connection is achieved, but the difficulty of operation and maintenance increases
Solution Approach 1:
The invention introduces dynamic axial movement of the die shaft, allowing it to move in and out of the die dome freely. This dynamic positioning eliminates the need for precise static matching of insertion depth and rotation angle, as the axial movement naturally accommodates variations and simplifies the operation while maintaining reliable connection through the positioning features.
4Reliability
If adhesive residue accumulation in the bayonet joint occurs, then contamination increases, but cleaning and maintenance effort increases
Solution Approach 1:
The invention extracts the bayonet joint connection from the system, eliminating the enclosed space where adhesive residue accumulates. By using axial movement instead of rotational engagement, the connection points are exposed and accessible, preventing residue accumulation and significantly reducing cleaning and maintenance effort while maintaining connection stability.
Data Source
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AI summary
The present invention describes an interchangeable die of a joining tool, in particular a setting device, which has a die head with an upper side and a lower side and a die shaft which extends perpendicularly from the underside of the die head and is adapted to be received and locked in a die dome without rotation, wherein the die shank comprises: at least one first radial ridge, which forms a two-sided axial undercut, via which the die shank can be locked in the die dome solely by means of a linear insertion movement, at least one second exposed radial ridge, the radial length of which can be adapted to a diameter of the die dome by a to ensure lateral guidance of the matrix shaft in the matrix dome, and which is arranged between the matrix head and the first radial web, and an ejection surface with which the interchangeable matrix can be pushed out of the matrix dome and at the free end of the matrix shaft is arranged opposite the die head. The present invention also relates to a die changer for an interchangeable die of a joining device, in particular a setting device, the interchangeable die adapted thereto and a die dome adapted to the interchangeable die and a method for removing an interchangeable die of a joining device and a method for inserting an interchangeable die into a joining device.