Screw Fastening Order Checking Device with Torque Control
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Solution Overview
Problem
In the assembly of electronic devices like smartphones and tablets, there is a need for an efficient method to ensure screws are fastened in the correct order and with appropriate torsional resistance to prevent damage or improper tightening.
Innovation Solution
An electronic device comprising a receiving member, a cover with screw guiding members, an electric screwdriver, a processor, storage device, and a warning unit that checks the fastening order and torsional resistance, outputting warnings and controlling the screwdriver to stop at preset resistance levels, ensuring screws are fastened correctly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual screw fastening is used, then operation flexibility is maintained, but fastening order and torque control cannot be ensured
Solution Approach 1:
The electronic device incorporates sensors that detect screw fastening status and provide real-time feedback to the control unit. The system monitors whether screws are fastened in the correct order and applies appropriate torque, automatically providing feedback signals to indicate completion or errors, thereby ensuring manufacturing precision without requiring complex manual monitoring procedures.
Solution Approach 2:
The system performs self-monitoring and self-correction by automatically detecting fastening status through sensors and adjusting the fastening process accordingly. The control unit independently manages the fastening sequence and torque application, reducing the need for external intervention while maintaining precision.
2Manufacturing precision
If automated screw fastening system is implemented, then fastening precision is improved, but device complexity and cost increase
Solution Approach 1:
The electronic device integrates multiple functions into a single compact unit: the control unit manages fastening sequence, torque control, and error detection; sensors serve both detection and feedback functions; the display unit provides both visual indicators and error messages. This multi-functionality reduces overall system complexity while maintaining high fastening precision.
Solution Approach 2:
The system replaces complex mechanical monitoring and control mechanisms with electronic sensors and control units. Instead of using mechanical interlocks or physical guides to enforce fastening order, the invention uses electronic detection and control signals, simplifying the mechanical structure while improving precision.
3Measurement precision
If screw fastening process is monitored manually, then detection simplicity is maintained, but error detection accuracy and time efficiency decrease
Solution Approach 1:
The sensor system continuously monitors the fastening process in real-time, detecting screw presence, fastening status, and torque application without interruption. This continuous detection ensures high measurement precision and immediate error detection, eliminating the need for intermittent manual checks that waste time and reduce accuracy.
Solution Approach 2:
Electronic sensors act as intermediaries between the mechanical fastening process and the control system. These sensors detect physical parameters (screw presence, torque, position) and convert them into electrical signals for processing, enabling accurate and rapid error detection without requiring direct human observation or manual measurement.
Data Source
AI summary
An electronic device for checking a fastening state of screws includes a receiving member, a cover, an electric screwdriver, a processor, and a warning unit. The receiving member receives a mountable device. The cover includes a number of screw guiding members, the screw guiding members guides the screws into screw holes on the mountable device. The electric screwdriver fastens the screws into the screw holes on the mountable device. The processor predefines an order of the electric screwdriver fastening the screws in response to operations of an operator; in a process of the electric screwdriver fastening the screws into the screw holes on the mountable device received in the receiving member, checks whether the fastening order is the same as the predefined order; and when the fastening order is not the same as the predefined order, controls the warning unit to output a warning message.