Oscillating Drive Superimposed Movement for Chip Removal
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Solution Overview
Problem
Existing oscillating drives for power-driven hand tools face challenges in plunge cuts due to chip clogging and wear issues, as the saw blade is prone to lateral stress and frictional heat, leading to reduced cutting performance and potential machine malfunction.
Innovation Solution
The oscillating drive incorporates a second coupling mechanism that allows the tool spindle to perform a superimposed movement perpendicular to its longitudinal axis, enabling adaptive movements for improved chip removal and reducing wear through geometric design and actuator-driven adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the saw blade is driven by oscillation with high frequency and small pivoting angle, then high-precision machining is achieved, but chip spaces become clogged and the saw blade is squeezed laterally during plunge cuts
Solution Approach 1:
The patent applies dynamics by making the oscillation parameters (amplitude and frequency) variable during the cutting process. The control unit adjusts the oscillation amplitude and frequency dynamically based on the cutting stage: using small amplitude/high frequency for precision cutting and larger amplitude/lower frequency for chip evacuation during plunge cuts, thus resolving the contradiction between precision and chip removal efficiency
Solution Approach 2:
The patent implements parameter changes by varying the oscillation characteristics (amplitude, frequency, and waveform) according to different cutting conditions. The control unit modifies these parameters in real-time to optimize both precision machining and chip removal, allowing the system to adapt between precision mode and chip evacuation mode to resolve the technical contradiction
2Manufacturing precision
If the saw blade oscillates without lateral movement, then high-precision machining is maintained, but the saw blade is prevented from swinging which converts oscillation into frictional heat and stresses the parts
Solution Approach 1:
The patent applies dynamics by enabling the tool spindle to perform controlled lateral movements in addition to oscillation. The second coupling mechanism allows the tool spindle to move laterally within a certain range, providing relief for the saw blade during high-load operations like plunge cuts, thereby reducing stress on mechanical parts and preventing overheating while maintaining cutting precision through active control
3Productivity
If a second coupling mechanism is added to enable superimposed movement perpendicular to the longitudinal axis, then chip removal is improved and wear is reduced, but the device complexity increases
Solution Approach 1:
The patent merges the oscillation function and lateral movement function into a single integrated tool spindle assembly. The first coupling mechanism provides oscillation while the second coupling mechanism provides lateral movement, and both are combined in one tool spindle that can perform复合 movements, reducing the need for separate mechanisms and controlling overall system complexity while achieving improved chip removal
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 configuration enhances cutting performance by facilitating effective chip removal and minimizing wear, allowing for precise and efficient plunge cuts with reduced risk of machine failure.
Implementation Method 1
the oscillating drive is provided with two eccentric coupling mechanisms, as a result of which the oscillating movement of the tool spindle is intended to take place with direction-dependent deflection
Implementation Method 2
the tool spindle executes a superimposed movement of oscillating movement directed perpendicularly to the longitudinal axis
Data Source
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AI summary
An oscillating drive is described, comprising a housing (14) in which a drive motor (26) for the rotary drive of a motor shaft (28) and a tool spindle (18) are accommodated, as well as a first coupling drive (30) which is coupled to the motor shaft (28) and the tool spindle (18) for the oscillating drive of the tool spindle (18) about its longitudinal axis (19), wherein a second coupling drive (38) is coupled to the tool spindle (18) in such a way that the tool spindle (18) performs a superimposed movement of rotationally oscillating and perpendicular to its longitudinal axis (19).