Mobile Saw Depth Setting for Precise Cut Start and End Alignment
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Solution Overview
Problem
Operators face difficulties in accurately locating the starting and ending points for saw cuts using hand-held or semi-stationary machine tools, particularly with plunge saws and semi-stationary saws, due to challenges in aligning the machining edge with the workpiece reference points.
Innovation Solution
A method that determines the distance between the machining edge and the workpiece reference, allowing for easy adjustment of the depth setting position, and includes a depth specification device that outputs values indicating the immersion or emergence of the work tool, enabling precise control of the cutting process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the operator positions the machine tool by eye to align the machining edge with the workpiece reference, then the ease of operation is improved, but the manufacturing precision deteriorates
Solution Approach 1:
The patent replaces manual visual positioning with an automated optical detection system. A detection device (camera or optical sensor) detects the workpiece reference (marked line or feature), and a control unit automatically calculates and adjusts the depth setting based on the detected position, eliminating the need for manual eye-based alignment while achieving precise cut start/end locations.
Solution Approach 2:
The machine tool performs self-positioning through the detection device that automatically identifies the workpiece reference and determines the required depth setting. The system serves itself by autonomously calculating the distance between the machining edge and workpiece reference, and adjusting the depth setting device without requiring operator intervention for precise positioning.
2Device complexity
If the depth setting position is manually adjusted without automated detection, then the device complexity is reduced, but the measurement precision deteriorates
Solution Approach 1:
The patent replaces manual depth measurement and estimation with an automated optical measurement system. The detection device optically measures the position of the workpiece reference with high precision, and the control unit automatically converts this measurement into the appropriate depth setting, achieving accurate distance measurement without complex manual measurement tools.
Solution Approach 2:
The detection device and control unit serve as intermediaries between the workpiece reference and the depth setting mechanism. Instead of directly measuring physical distances with complex tools, the system uses optical detection as an intermediary to capture position information and translate it into depth control signals.
Data Source
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AI summary
The invention relates to a mobile machine tool (10) comprising a guide element (30), having a guide surface (32), for guiding the machine tool and a workpiece surface (WO) of the workpiece (W) to one another along a machining path (BA), in particular a machining line. The machine tool comprises a drive unit (11) having a drive motor (12) for driving a tool receptacle arranged on the drive unit (11) for receiving a work tool (15) and a detection device for detecting at least one workpiece reference (RB, RE) which is associated, with respect to a machining path (BA), with a machining start point (BB) where the work tool (15) starts the machining of the workpiece (W) or with a machining end point (BE) where the work tool (15) ends the machining of the workpiece (W). According to the invention, the tool receptacle is designed for rotationally driving the work tool (15) about an axis of rotation (D) and for adjusting a penetration depth of the work tool (15) into the workpiece by means of a depth adjustment device (20) between depth adjustment positions (T1, T2, T3). The work tool has, on its radial outer circumference (17), a cutting region for cutting the workpiece (W) thus forming a machining edge (KB, KE) which are at different distances from the at least one workpiece reference (RB, RE) depending on at least two depth adjusting positions (T1, T2, T3) in which the work tool projects at different distances from the guide surface, and the machine tool uses a depth adjustment device (70) for determining a distance value (DB) of the distance of the machining edge (KB, KE) to at least one workpiece reference (RB, RE) and for determining a depth predetermined value (TV) for the depth adjustment position (T1, T2, T3) in accordance with the distance value.