Clamping Drive Spindle Force Sensing for Precise Workpiece Clamping
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Solution Overview
Problem
Existing clamping drives lack the ability to precisely monitor and adjust the clamping force applied to a workpiece, which can lead to damage or improper clamping due to insufficient or excessive force.
Innovation Solution
A force measuring module connected to the drive spindle, comprising a measuring element and an evaluation unit, allows for continuous monitoring and adjustment of the clamping force, with optional display, power supply, and wireless communication capabilities to ensure precise force application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a force measuring module is added to the drive spindle, then measurement precision of clamping force is improved, but device complexity increases
Solution Approach 1:
The force measuring module is integrated directly into the drive spindle structure. The measuring element is positioned within the spindle, and the evaluation unit is housed in the same assembly, combining multiple functions (driving, measuring, evaluating) into a single integrated component rather than separate modules.
Solution Approach 2:
The drive spindle serves multiple functions: it transmits rotational motion to the jaw carriers, provides a mounting structure for the force measuring module, and acts as the measurement location for clamping force detection. This multi-functionality reduces the need for additional separate components.
2Reliability
If continuous force monitoring is implemented, then reliability of workpiece clamping is improved, but use of energy increases
Solution Approach 1:
The evaluation unit automatically processes measurement signals and generates alarms without requiring continuous external intervention. The system self-monitors clamping force and autonomously detects when force limits are exceeded, reducing the need for constant external energy input for monitoring.
Solution Approach 2:
The system continuously measures clamping force and provides feedback through the evaluation unit that compares actual force against predetermined limits. When limits are exceeded, an alarm is generated, creating a closed-loop monitoring system that maintains reliability through automatic feedback rather than continuous high-energy external monitoring.
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
Enables precise force adjustment and continuous monitoring, preventing workpiece damage by ensuring the clamping force remains within safe limits, and allowing for centralized monitoring and control of multiple clamping drives.
Implementation Method 1
the force measuring module has at least one measuring element for detecting tensile and/or compressive deformations
Data Source
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AI summary
The invention relates to a clamping drive (1) with a first jaw carrier (2) and a second jaw carrier (3), wherein the first jaw carrier (2) and the second jaw carrier (3) are connected to a drive spindle (5) in such a way that they can be moved translationally relative to each other by the drive spindle (5), wherein the first jaw carrier (2) is fixed to a lower part (4).In a clamping drive (1) that enables the monitoring of the force currently applied to a workpiece, it is provided that a force measuring module (9) is connected to the drive spindle (5), that the force measuring module (9) has at least one measuring element (10) for detecting tensile and/or compressive deformations, that the force measuring module (9) includes an evaluation unit (11), and that signals from the measuring element (10) can be received by the evaluation unit (11), whereby information regarding a force applied to the force measuring module (9) can be determined by the evaluation unit (11) depending on the signal from the measuring element (10).