Band Saw Blade Guide Pressure Sensor Integration
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Solution Overview
Problem
Existing band saw machines face challenges in accurately detecting cutting loading during workpiece cutting, leading to inefficiencies and inaccuracies in speed adjustment due to time delays and signal transmission issues through multiple elements.
Innovation Solution
A blade guide system with a pressure sensor integrated into the blade guide, directly contacting the band saw, allows for precise detection of cutting loading and immediate signal transmission to the motor controller for optimal speed adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the pressure sensor is mounted on the motor shaft or driven wheel shaft, then the structure is simple to implement, but the detection accuracy is low and there is time delay in speed adjustment
Solution Approach 1:
The patent introduces an intermediary mechanical transmission path consisting of a pressing block, flexible connection member, and signal transmission mechanism between the band saw blade and the pressure sensor. This intermediary structure directly contacts the blade at the cutting position and transmits the cutting resistance force to the sensor, eliminating detection delays while maintaining structural feasibility
Solution Approach 2:
The patent replaces the electrical/signal-based detection system with a direct mechanical contact system. The pressure sensor is mechanically coupled to the blade through the pressing block and flexible connection member, converting the cutting resistance force directly into a measurable signal at the source, thereby improving both response time and accuracy
2Ease of manufacture
If the pressure sensor is mounted on the motor shaft or driven wheel shaft, then the installation is simple, but the signal transmission is inaccurate through multiple elements
Solution Approach 1:
The patent extracts the pressure detection function from the motor/driven wheel shaft location and relocates it to the blade guide position where the blade directly contacts the workpiece. This extraction eliminates the intermediate signal transmission path through multiple mechanical elements, ensuring accurate detection of cutting resistance force at its source
Solution Approach 2:
The pressing block serves as a dedicated intermediary element that directly contacts the blade and transmits only the cutting resistance force to the pressure sensor, filtering out extraneous forces and vibrations from other parts of the system, thereby improving signal purity and accuracy
3Device complexity
If the band saw speed is adjusted with time delay, then the system response is slower, but the control system is simpler
Solution Approach 1:
The patent implements preliminary detection by positioning the pressure sensor at the blade guide location where cutting conditions are first established. This allows the control system to detect changes in cutting resistance before they propagate to the motor, enabling proactive speed adjustment rather than reactive correction, thus reducing overall system response time
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
Enables precise and timely speed adjustments of the band saw, improving cutting quality by accurately responding to workpiece characteristics and internal structures, enhancing cutting efficiency and accuracy.
Implementation Method 1
a pressure sensor received in the opening and contacting the pressing block to detect a pressure of the pressing block
Data Source
AI summary
A blade guide of a band saw machine includes a main member, on which two wheels, two holding blocks, a pressing block, and a pressure sensor are provided. The main member is provided with a slot, a hole, and an opening. The wheels are pivoted on the main member and received in the slot. The holding blocks are received in the hole, and a band saw passage is formed between the holding blocks. The band saw passage is communicated with the slot for a band saw passing therethrough. The pressing block is received in the hole to contact the band saw in the band saw passage. The pressure sensor is received in the opening and contacting the pressing block to detect a pressure of the pressing block.