Press Device Position Measurement for Powder Compaction
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Solution Overview
Problem
Existing powder pressing technologies face challenges in achieving precise positioning of press plungers due to compression and thermal influences, leading to inaccuracies and the need for frequent readjustment, which increases production time and risk of defects in pressed parts.
Innovation Solution
A press device with a position measuring system that directly connects measuring elements to the punches, using sensors to determine the relative position of the punches, minimizing errors from compression and thermal changes by positioning the measuring elements close to the contact point with the die, and employing a control device for precise regulation of the pressing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If measuring elements are connected to punches directly, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The measuring system is segmented into independent measuring elements (first and second measuring elements) that are separately connected to the first and second punches. Each measuring element independently measures the position of its associated punch, allowing for modular implementation and reduced overall system complexity while maintaining high measurement precision.
Solution Approach 2:
Measuring elements serve as intermediaries between the punches and the sensor device. These measuring elements directly connect to the punches and transmit position information to the sensor, enabling precise measurement without requiring complex direct sensor-to-punch integration.
2Manufacturing precision
If measuring elements are positioned close to the die contact point, then manufacturing precision is improved, but ease of manufacture deteriorates
Solution Approach 1:
The measuring elements are positioned at specific locations on the punches - the first measuring element is connected to the first punch and the second measuring element to the second punch. This localized positioning near the die contact point ensures that measurements reflect the actual pressing conditions and dimensional changes at the critical measurement location, thereby improving manufacturing precision.
3Reliability
If relative position measurement is used, then reliability is improved, but device complexity increases
Solution Approach 1:
The sensor device combines the measurements from the first measuring element (connected to the first punch) and the second measuring element (connected to the second punch) to determine the relative position between the punches. By merging these two measurement streams, the system achieves high reliability in position determination while using relatively simple individual measuring elements.
Data Source
AI summary
A metal-powder and/or ceramic-powder press device includes at least one first punch (11) which, in a pressing position, is arranged to pass from a first side into a die opening, filled with ceramic and/or metal powder, of a die (13). At least one second punch (12), in the pressing position, is arranged to pass from a second side into the die opening, filled with ceramic and/or metal powder, of the die (13). A position measuring device determines a position of the first punch (11) and includes a first measuring element (16) and a second measuring element (19). The first measuring element (16) is connectable to the first punch (11) and the second measuring element (19) is connectable to the second punch (12), such that a relative position of the measuring elements to one another changes during the pressing operation. A sensor device determines the change in the relative position.