Swiss Lathe Guide Device Wedge Mechanism Radial Adjustment
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Solution Overview
Problem
Existing guide devices for Swiss type lathes suffer from precision inaccuracies due to simultaneous radial and axial movements during machining operations, affecting the precision of workpiece guidance.
Innovation Solution
A guide device with an axially immovable guide unit that utilizes a wedge mechanism and an actuating force generation unit, allowing for controlled, exclusively radial force application onto the workpiece through a force-controlled actuating element, which can be moved by an actuating force generation unit such as a servomotor or pressurized medium, ensuring precise positioning and adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the adjustment device allows radial movement of the guide unit, then the guide surfaces can be adjusted relative to the workpiece, but this simultaneously causes axial movement that reduces machining precision
Solution Approach 1:
The guide device is segmented into functionally independent components: the guide unit for radial adjustment and the positioning device for axial positioning. This segmentation allows radial movement of guide surfaces without causing axial movement, resolving the contradiction between adjustability and precision.
Solution Approach 2:
A positioning device acts as an intermediary between the guide unit and the workpiece, providing independent axial positioning. This intermediary component decouples the radial adjustment function from axial position control, enabling precise radial adjustment without affecting axial guiding precision.
2Reliability
If the guide surfaces apply force to the workpiece in the radial direction, then guidance is maintained, but uncontrolled force variation affects guiding precision
Solution Approach 1:
A force sensor provides feedback on the contact force between guide surfaces and workpiece, enabling closed-loop control. The control unit adjusts the actuating force based on sensor feedback to maintain a predetermined optimal force level, ensuring both guidance stability and precision without uncontrolled force variations.
Solution Approach 2:
The system dynamically changes the actuating force parameter applied by the actuator to the guide unit, adjusting it in real-time based on workpiece characteristics and machining conditions. This parameter control ensures optimal contact force for precise guidance while preventing excessive force that would compromise precision.
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 solution enables precise control of the guide surfaces' force application, maintaining precision without introducing axial inaccuracy, allowing for high-precision machining operations by adjusting the force and position of the guide surfaces relative to the workpiece.
Implementation Method 1
the adjustment area forms a wedge mechanism together with the spindle sleeve and guide elements of the guide unit
Implementation Method 2
the actuating force generating unit is designed as an actuating force generating unit that can be acted upon by a pressurized medium
Data Source
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AI summary
The guiding mechanism (30) has a spindle housing pivoted in an outer housing and has a guide unit, which guides the work piece (20) by guiding surfaces. The guide unit is axially positioned relative to the spindle housing and is movable by a control element, which is arranged between the spindle housing and the guide unit.