Wedge Arrangement for Stable Transverse Powder Press Positioning
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Solution Overview
Problem
Existing powder press devices face instability and imprecision in positioning cross-pressing punches at high forces, leading to unintended changes in pressing position.
Innovation Solution
A wedge arrangement with a stop surface transverse to the displacement direction is used, featuring wedge surfaces angled at a few degrees for self-locking and precise positioning, along with adjustable means like micrometer screws for precise adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an adjustable stop formed by a third wedge is used to determine the pressing position of transverse pressing rams, then the pressing position can be adjusted, but the stop is not stable enough at high pressing forces and the position can change unintentionally
Solution Approach 1:
The wedge arrangement allows dynamic adjustment of the pressing position through the adjustable third wedge, while the self-locking mechanism ensures the position remains fixed during pressing operations. The system transitions from an adjustable state during setup to a locked stable state during operation.
Solution Approach 2:
The wedge arrangement acts as an intermediary mechanism between the adjustable stop and the transverse pressing ram. It translates small adjustments of the third wedge into precise positioning while providing mechanical advantage and stability through the wedge geometry and self-locking effect.
2Device complexity
If conventional positioning means are used for transverse pressing punches, then the device structure is simple, but absolutely precise positioning cannot be guaranteed even with servo drive devices
Solution Approach 1:
The invention replaces complex servo drive mechanisms with a purely mechanical wedge arrangement for positioning. This mechanical system provides precise positioning through the geometric relationship of the wedges and self-locking effect, eliminating the need for complex electronic control systems while achieving superior positioning accuracy.
Solution Approach 2:
The wedge angle is carefully selected to provide the optimal balance between adjustability and locking stability. By changing the geometric parameter of the wedge angle, the system achieves both ease of adjustment and precise, stable positioning without requiring complex control systems.
3Reliability
If wedge surfaces with a small angle are used in the wedge arrangement, then self-locking is achieved for secure retention, but the adjustment mechanism requires more force to operate
Solution Approach 1:
The adjustment is performed before the pressing operation begins. The third wedge is adjusted to the desired position while no pressing force is applied, and then the system locks in place. This preliminary adjustment eliminates the need to overcome high pressing forces during positioning.
Solution Approach 2:
The system operates in two dynamic states: an adjustment state where the third wedge can be moved freely to set the position, and a working state where the wedge arrangement self-locks to maintain the position under high pressing forces. The transition between these states resolves the force contradiction.
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
Ensures stable and precise positioning of cross-pressing punches even at high pressures, maintaining accurate compact dimensions with long-term secure retention.
Implementation Method 1
the wedge assemblies are designed with wedge surfaces that have an angle of a few degrees relative to their longitudinal extension, so that this wedge assembly is in the self-locking range
Data Source
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AI summary
The invention relates to a powder press having preferably a plurality of stamps (11) which are movable for a transverse press in a feed housing (10), said stamps partially delimiting a hollow chamber of a matrix in the feed housing (10) and being able to be coupled to a press device (40) by one connector piece each. An adjustable positioning means, which is formed from a wedge arrangement (20) having a stop surface (22) and placed crosswise to the moving direction of the stamp (11) is allocated to the respective stamp (11) for determining the pressing position thereof. Said wedge arrangement (20) comprises at least one wedge (21), which is adjustable crosswise to the moving direction of the stamp (11) and has the stop surface (22), which contacts a stop surface (11") at the stamp (11). Such a wedge arrangement can achieve very accurate pressing positions of the stamp, first of all, and extremely stable positioning of the stamp to be pressed with high pressure, second of all.