Machining Tool Clamping Structure for Bidirectional Stroke Stability
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Solution Overview
Problem
Existing machining units face challenges in maintaining the position of the machining tool during machining processes due to alternating forces, with prior solutions either being hindered by spatial constraints or having reduced load-bearing capacity.
Innovation Solution
A machining unit with a form-fitting support system along the working axis, utilizing a tension element with a clamping device that provides optimal pretension, allowing the machining tool to be securely positioned without upstream fasteners, and utilizing a hydraulic tensioning device for precise prestressing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a locking nut and threaded section are used to clamp the machining tool, then the machining tool position stability is improved, but spatial constraints are hindered due to upstream fasteners
Solution Approach 1:
Instead of supporting the machining tool from upstream (forward stroke direction) with locking nuts and threaded sections, the invention supports the tool from downstream (return stroke direction) using a support surface on the tool abutment. This inverted approach eliminates the need for upstream fasteners while maintaining position stability during both forward and return strokes.
Solution Approach 2:
The invention extracts and removes the upstream locking nut and threaded section components from the tool support structure. By taking out these fastening elements, the design achieves spatial adaptability and eliminates interference with the workpiece while maintaining tool positioning through the downstream support surface approach.
2Device complexity
If material-bonding joining is used to fix the machining tool, then the device complexity is reduced, but the load-bearing capacity is reduced
Solution Approach 1:
The tension element serves dual functions: it provides the clamping force necessary to secure the machining tool against the support surface, and simultaneously acts as a reaction element that transmits machining forces. This self-service approach eliminates the need for separate fastening components while maintaining high load-bearing capacity through the pre-tensioned element.
Solution Approach 2:
The tension element is pre-tensioned before the machining process begins, creating a pre-compressive force on the machining tool. This preliminary action ensures that the tool remains firmly clamped against the support surface throughout the machining cycle, enabling the structure to withstand large machining forces without requiring complex fastening mechanisms.
3Strength
If the tension element is pre-tensioned to maximum strength, then the load-bearing capacity is improved, but the risk of exceeding tensile strength increases
Solution Approach 1:
The support surface for the return stroke acts as a feedback mechanism that automatically regulates the force transmission. When the machining tool experiences large forces during the return stroke, the support surface provides a reaction force that prevents excessive loading on the tension element, ensuring the pre-tension remains within safe limits while maintaining high load-bearing capacity.
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
Ensures the machining tool remains securely positioned during both forward and return strokes, accommodating large machining forces and spatial limitations, while allowing for precise adjustment and maximum utilization of the tension element's strength.
Implementation Method 1
the tension element of the clamping device, which is structurally separate from the tool abutment, can be pre-tensioned in tension along the working axis
Implementation Method 2
the abutment-side return-lift support surface facing away from the abutment-side forward-lift support surface is acted upon by the adjusting element of the clamping device along the working axis in the direction of the machining tool
Data Source
Figure 1a~1b
Figure 2~3
AI summary
A processing unit (1) for processing a workpiece (7) on a workpiece wall has a processing tool (3), a tool abutment (4) and also a clamping device (5). In the processing of the workpiece, the processing unit (1) performs along a working axis (8) a forward stroke in a forward-stroke direction (9) and a return stroke in a return-stroke direction (10) with respect to a workpiece (7) to be processed. The processing tool (3) is supported In the forward stroke on an abutment-side forward-stroke supporting surface (11) of the tool abutment (4) and in the return stroke on an abutment-side return-stroke supporting surface (13) of the tool abutment (4) along the working axis (8). The abutment-side return-stroke supporting surface (13) is kept at a distance from the abutment-side forward-stroke supporting surface (11) in the return-stroke direction (10) and is facing away from the abutment-side forward-stroke supporting surface (11). The clamping device (5) comprises a tensioning element (14), which is structurally separate from the tool abutment (4) and, along the working axis (8), on one side is connected to the processing tool (3) and on the other side has an adjusting thread (19), with which an adjusting element (15) of the clamping device (5) is in threaded engagement. The tensioning element (14) of the clamping device (5) can be pretensioned along the working axis. With the tensioning element (14) pretensioned, the processing tool (3) is clamped against the abutment-side forward-stroke supporting surface (11) and against the abutment-side return-stroke supporting surface (13) by means of the tensioning element (14) and by means of the adjusting element (15) acting on the abutment-side return-stroke supporting surface (13) along the working axis (8) in the direction of the processing tool (3). A processing machine has a processing unit (1) of the aforementioned type. A processing unit (1) of the aforementioned type is produced by the tensioning element (14) of the processing unit (1) being pretensioned by means of a tensioning apparatus.