Handheld Piercing Saw Sensor Alignment
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Solution Overview
Problem
Existing hand-held machine tools, such as jigsaws and circular saws, face challenges in guiding a desired work path that is often obscured due to mechanical complexity and limited usability of auxiliary devices, requiring extensive preparatory work and struggling with existing reference contours that are difficult to use directly.
Innovation Solution
A sensor arrangement with a detection surface is provided to align the machine tool with the work path by detecting values of the specified path, allowing semi-autonomous guidance with optical and mechanical visualization of deviations, enabling precise alignment and monitoring of the work process, especially in critical areas like offset contours.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If auxiliary devices like guide shoes are used to guide the machine tool along a path specification, then the work path guidance is improved, but the device complexity increases and mechanical complexity arises
Solution Approach 1:
The patent replaces mechanical guide shoes and boom assemblies with an optical sensor system. A sensor arrangement detects the path specification (e.g., marked line or laser line) optically, and an actuating unit with servo drive adjusts the saw blade position based on sensor signals, eliminating complex mechanical guidance structures.
Solution Approach 2:
The machine tool performs its own guidance function through integrated sensors and actuators. The sensor arrangement mounted on the machine housing detects the path specification, and the control unit automatically adjusts the cutting position, making the system self-guiding without external mechanical辅助设备.
2Ease of operation
If mechanical guide shoes are used for path guidance, then work path following is improved, but the ease of operation deteriorates due to extensive preparatory work required
Solution Approach 1:
The system performs preliminary detection and calculation of the offset distance between the saw blade and path specification before cutting begins. The sensor arrangement detects the path marking, the control unit calculates the required offset, and the actuating unit pre-positions the saw blade, all before the actual cutting operation starts.
Solution Approach 2:
The optical sensor system replaces mechanical guide shoes, eliminating the need for physical attachment and setup of mechanical guidance devices. The sensor can detect various path specifications (marked lines, laser lines) without requiring physical contact or mechanical mounting.
3Manufacturing precision
If the work path is offset from the path specification, then precise work along the work path is facilitated, but the detection precision must be high to maintain accurate alignment
Solution Approach 1:
The sensor arrangement continuously detects the position of the path specification relative to the machine tool during operation. The control unit processes this feedback information and dynamically adjusts the actuating unit to maintain the correct offset distance, ensuring accurate work path following despite the offset requirement.
Solution Approach 2:
The control unit acts as an intermediary that processes the raw sensor data, calculates the required adjustments considering the offset distance, and generates appropriate control signals for the actuating unit. This intermediary processing layer enables accurate offset following by translating detection data into precise positioning commands.
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 efficient and accurate guidance of machine tools along offset work paths, even for inexperienced users, ensuring good work results by allowing the tool to align itself with the specified path and providing visualization of deviations through optical and acoustic signals, thus simplifying the operation and improving user support.
Implementation Method 1
a sensor arrangement with a detection surface located in the vicinity of the working area of the tool is provided as an auxiliary device, with which the path specification has an overlapping area, so that starting from above the sensor arrangement detects values of the specified path
Data Source
AI summary
For a machine tool (1), particularly in form of a handheld piercing saw (2), with orientation provided by the sensory detection of the specified path (23) by way of control means (26), the alignment of the saw blade (8), which can be rotated about the axis (22) thereof, with a working path (24) running in parallel to the specified path (23) with offset is carried out on a specified path (23).