Cylindrical Die Matching with Eddy Current Servo Alignment
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Solution Overview
Problem
The conventional die matching process in thread and form rolling machinery is time-consuming and inefficient, requiring skilled operators and manual adjustments, as it relies on trial and error to achieve precise positioning of cylindrical dies for producing continuous thread surfaces.
Innovation Solution
A machine tool system that uses sensors, such as eddy current sensors, to detect reference features on cylindrical dies and generate positioning signals for servo motors to automatically adjust the die positions, ensuring precise alignment and continuous matching during operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual trial and error die matching process is used, then die positioning precision can be achieved, but production time increases significantly and productivity decreases
Solution Approach 1:
The patent replaces the manual mechanical adjustment system with an automated optical measurement and control system. Sensors detect reference features on dies, a computer processes the positional data, and actuators automatically adjust die positions, eliminating the need for manual trial-and-error adjustments while maintaining precision and significantly reducing setup time.
Solution Approach 2:
The system enables the machinery to automatically perform die matching without human intervention. The sensors, computer, and actuators work together as a self-service system that autonomously measures die positions, calculates required adjustments, and executes the positioning, freeing operators from time-consuming manual matching tasks.
2Manufacturing precision
If skilled operators perform manual die matching, then precise die positioning is achieved, but the process requires highly experienced personnel and increases operational complexity
Solution Approach 1:
The patent replaces the human operator's manual adjustment skills with an automated optical measurement and control system. Sensors detect reference features on dies, a computer processes the positional data and calculates adjustments, and actuators execute the positioning, eliminating the need for highly skilled operators while maintaining precision.
Solution Approach 2:
The system introduces a computer-based control system as an intermediary between the operator and the die matching process. This intermediary automatically performs the complex measurement and adjustment calculations that previously required human expertise, simplifying the operator's role while maintaining high precision.
3Manufacturing precision
If multiple die and machine adjustments are made during matching, then finished product quality is improved, but the number of adjustments increases process complexity and time consumption
Solution Approach 1:
The system performs preliminary measurement and calculation of die positions before any physical adjustments are made. Sensors detect reference features and the computer calculates the exact adjustments needed, allowing all necessary corrections to be planned in advance and executed in a single coordinated operation, eliminating multiple iterative adjustments.
Solution Approach 2:
The system uses sensors to continuously monitor die positions and provides feedback to the computer control system. This feedback loop allows the system to automatically detect positioning errors, calculate corrections, and execute adjustments, reducing the number of iterative adjustments needed compared to manual methods.
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 automatic and continuous die matching, reducing the need for manual adjustments and increasing productivity by maintaining precise die positioning throughout the manufacturing process, even in the absence of skilled operators.
Implementation Method 1
A sensor, such as an eddy current sensor, is disposed adjacent to the path of the reference feature
Data Source
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AI summary
A die matching system which is preferably implemented in die rolling machinery for fasteners employs witness or reference marks on each of the dies. An eddy current sensor is employed to sense the witness marks and to detect change in the relative position of the witness mark and hence the position of the rotatable dies. The change in position is then processed and a signal is transmitted to servo motors to change the relative position of the dies to compensate for the position changes continuously during the operation of the die rolling machinery. In one preferred form, the witness mark is in the form of a recess milled into the bottom end surface of the cylindrical die.