Compact Spindle Adjustment System with Coaxial Drive
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Solution Overview
Problem
Existing adjustment systems for tool cutting edges require significant space and device technology outlay, and are limited by complex control systems and limited adjustment paths, making them unsuitable for compact processing units.
Innovation Solution
A compact adjustment system featuring a spindle with a direct coaxial drive and a non-contact linear drive actuating element, integrated spindle drive, and a magnetostrictive measuring system, which eliminates the need for rear bearings and complex control systems, allowing for precise radial adjustment with minimal installation space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a conventional spindle drive with belt drive or parallel motor is used, then the spindle can be driven effectively, but considerable installation space and equipment effort are required
Solution Approach 1:
The drive function is integrated directly into the spindle structure. The motor is mounted coaxially on the spindle nose, merging the drive mechanism with the spindle body, thereby eliminating separate drive components and reducing installation space while maintaining effective spindle drive capability
Solution Approach 2:
The drive arrangement transitions from a parallel or belt-driven configuration to a coaxial arrangement. By positioning the motor and drive mechanism along the spindle axis rather than parallel to it, the system achieves compact integration without compromising power transmission effectiveness
2Ease of operation
If a conventional linear actuator with rear support is used, then the actuating element can be adjusted, but significant space and bearing arrangements are required
Solution Approach 1:
The linear actuator is designed as a self-contained unit where the motor integrates the drive function. The actuating element is directly coupled to the motor shaft, eliminating the need for external rear support structures and bearing arrangements, thereby enabling adjustment functionality with minimal space requirement
Solution Approach 2:
The motor and linear drive mechanism are merged into a single integrated unit. The actuating element serves dual purposes as both the drive output and the adjusted component, eliminating separate support structures and reducing overall space requirements
3Manufacturing precision
If piezo translators are used for tool cutting edge adjustment, then precise adjustment can be achieved, but considerable control engineering effort and limited adjustment range are required
Solution Approach 1:
The system replaces complex piezoelectric control mechanisms with a simpler electromagnetic motor-driven linear actuator. This substitution maintains adjustment precision while significantly reducing control system complexity and expanding the available adjustment range through direct mechanical coupling
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
The system achieves high precision and reduced inaccuracies due to thermal expansion, with improved rigidity and reduced device technology requirements, enabling precise machining of non-round and cylindrical contours in compact setups.
Implementation Method 1
the actuator is designed as a non-contact linear actuator
Implementation Method 2
The measuring system has a particularly simple design, as it is designed as a magnetostrictive system. In this design, a waveguide of the measuring system is mounted in the actuating element and carries a magnetic ring
Data Source
Figure 1
AI summary
Disclosed is an adjustment system comprising a feed head which supports a tool blade and is mounted on a spindle. The tool blade is fed by an actuation element which can be moved by a contactless linear drive.