Clamping Device Slide Elements Absorb High Tensile Forces
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Solution Overview
Problem
Conventional clamping devices are unable to effectively absorb high tensile forces due to the small contact surface area of clamping elements, limiting their ability to transfer forces in the pulling direction, particularly in applications like powder presses where high extraction forces are required.
Innovation Solution
The clamping device features slide-like clamping elements that engage over a large area on the lateral surface of the workpiece carrier, providing a significantly larger contact surface for force transmission and enabling the absorption and transfer of high forces in the pulling direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If spring-loaded clamping balls are used to clamp the workpiece carrier, then the clamping mechanism can engage the clamping surface, but the tensile forces cannot be absorbed due to the very small contact surface of the balls
Solution Approach 1:
The invention transitions from point-contact clamping (balls) to surface-contact clamping by extending the clamping interface along the lateral surface of the workpiece carrier. The slide-like clamping elements engage with the clamping surface that runs essentially along the lateral surface, transforming the contact geometry from zero-dimensional (point) to two-dimensional (surface), thereby distributing tensile forces over a larger area and reducing surface pressure.
Solution Approach 2:
The invention changes the contact surface area parameter from very small (ball contact) to large (lateral surface contact). By designing slide-like clamping elements that engage over a large area on the lateral surface, the contact surface area is increased significantly, enabling the absorption of high tensile forces without exceeding material stress limits.
2Force
If a conventional ball clamping mechanism is used, then the clamping device can hold the workpiece carrier, but it cannot transfer high forces in the pulling direction due to the small contact area
Solution Approach 1:
The invention extends the clamping interface from point-contact to surface-contact by having clamping elements engage along the lateral surface of the workpiece carrier. This dimensional change from point to surface contact enables effective force transfer in the pulling direction by distributing the load over a larger contact area.
Solution Approach 2:
The clamping force is distributed across multiple slide-like clamping elements arranged around the lateral surface of the workpiece carrier. This segmentation of the clamping interface into multiple distributed contact points along the lateral surface allows the system to handle high tensile forces by sharing the load across several elements, each with adequate contact area.
3Force
If high extraction forces are applied to pull the stamp out of the die, then the stamp can be removed from compacted powder mass, but the conventional clamping mechanism cannot absorb these forces
Solution Approach 1:
The invention changes the contact surface area parameter from very small (ball contact) to large (lateral surface contact), enabling the clamping mechanism to absorb high extraction forces. The slide-like clamping elements engaging over a large area on the lateral surface provide the necessary contact area to reliably transfer the high tensile forces generated during stamp extraction from compacted powder masses.
Solution Approach 2:
By extending the clamping interface along the lateral surface, the invention creates a two-dimensional contact area that can reliably absorb the high extraction forces required to remove stamps from compacted powder masses, transforming the inadequate point-contact system into a robust surface-contact system.
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
This design allows for the absorption and transfer of high forces in the pulling direction, reducing surface pressure and enabling the efficient extraction of stamps from compacted powder masses, suitable for applications in powder presses and multi-level systems.
Implementation Method 1
slide-like clamping elements (10a, 10b), which engage over a large area on the outside of the workpiece carrier (22a, 22b), namely on a clamping surface (28a, 28b) that runs essentially along the lateral surface
Implementation Method 2
The front sides (12) of the four slide elements (10) facing the workpiece carrier (22) extend together over approximately 320° of the circumference of the workpiece carrier (22)
Data Source
Figure 1
Figure 2a~2b
Figure 3~4
AI summary
A clamping device has a chuck (1) and a releasable workpiece support (22) in which the chuck (1) has a clamping mechanism for fixing the support (22). The clamping mechanism also has a number of clamping elements which are designed as sliding elements. The workpiece support (22) has a clamping surface (28a) extending along its lateral surface (26) on which the sliding elements are placed during tight clamping.