Mobile Machine Tool Position Sensing for Precise Depth Adjustment
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Solution Overview
Problem
Manual operation of mobile machine tools is challenging due to the need for visual contact with the workpiece contact region, making precise adjustments and monitoring of tool penetration depth difficult and inefficient.
Innovation Solution
Incorporation of tool sensors and position sensors with an evaluation device for detecting workpiece contact and relative position, providing optical display of adjustment information and allowing for precise monitoring of tool position and penetration depth without visual contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the operator works by visual contact with the workpiece contact region, then they can directly observe the cutting process, but handling becomes difficult and precision is reduced
Solution Approach 1:
The patent replaces the mechanical visual inspection method with an optical sensor system. The tool sensor (camera) captures images of the workpiece contact region, and the evaluation device processes these images to provide visual feedback on a display device, eliminating the need for the operator to visually contact the cutting region while improving positioning precision
Solution Approach 2:
The patent introduces an intermediary system consisting of the tool sensor, evaluation device, and display device. This intermediary system acts as a mediator between the cutting process and the operator, transmitting visual information about the workpiece contact region without requiring direct visual contact, thereby improving both precision and ease of operation
2Loss of information
If the operator manually adjusts the drive unit position, then the machine tool remains simple in structure, but monitoring of penetration depth becomes difficult
Solution Approach 1:
The patent implements a feedback system where the position sensor continuously monitors the relative position of the drive unit, the tool sensor monitors the workpiece contact region, and the evaluation device processes this information to provide real-time feedback on penetration depth and position through the display device, eliminating information loss while managing system complexity
Solution Approach 2:
The evaluation device serves multiple functions: it evaluates position sensor signals to determine drive unit position, evaluates tool sensor signals to detect workpiece contact, and provides visual feedback through the display device. This multi-functionality reduces the need for separate systems, managing overall complexity while preventing information loss
3Productivity
If visual contact with the workpiece contact region is required, then the operator can see the cutting process, but handling becomes awkward and inefficient
Solution Approach 1:
The patent replaces the mechanical requirement for visual contact with an optical sensing system. The tool sensor captures visual information about the cutting process, and the evaluation device processes this information for display, allowing the operator to monitor the cutting process without visual contact with the workpiece contact region, thereby improving both productivity and ease of operation
Data Source
AI summary
A mobile machine tool (10), namely a manually-operated machine tool or semi-stationary machine tool, for machining a workpiece (W), wherein the machine tool has a plate-like guide element (30) with a guide surface (32) for guiding the machine tool on the workpiece (W) or the workpiece (W) on the machine tool, wherein the machine tool has a drive unit (11) with a drive motor (13) for driving a tool holder (14) arranged on the drive unit (11), wherein the drive unit (11) is, by means of a bearing arrangement (35), mounted adjustably on the guide element (30) in order to adjust at least two adjustment positions (S0, S1, S2) of the tool holder (14) relative to the guide surface (32), wherein at least one adjustment position (S0, S1, S2) corresponds to a workpiece machining position in which the work tool (15) arranged on the tool holder (14).