Multi-Head Vibration Welding with Master-Slave Phase Synchronization
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Solution Overview
Problem
Current vibration welding machines face difficulties in synchronizing multiple oscillating heads, leading to unreliable connections of large plastic parts due to uncontrolled, non-in-phase oscillations, limiting the feasibility of welding larger constructions.
Innovation Solution
The apparatus and method involve mechanically decoupled oscillating heads connected via frequency converters and an electrical switch, allowing for synchronous or asynchronous operation by designating one frequency converter as a master and others as slaves, enabling synchronized frequency, phase, and amplitude control without mechanical coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple oscillating heads are mechanically coupled to achieve synchronous operation, then frequency and phase synchronization is possible, but device complexity increases and construction becomes difficult
Solution Approach 1:
The patent replaces the mechanical coupling system with an electrical control system. Frequency converters are used to control each oscillating head's motor independently through electrical signals, eliminating the need for mechanical linkages while achieving synchronous operation. This substitution resolves the contradiction by maintaining synchronization reliability through electrical control while dramatically reducing mechanical complexity.
Solution Approach 2:
The patent employs frequency converters that can control multiple oscillating heads through a standardized electrical interface. This universal control approach allows the same electrical system to synchronize any number of oscillating heads without requiring different mechanical coupling mechanisms for each configuration, thereby reducing overall device complexity while maintaining synchronization.
2Area of stationary object
If the number of oscillating heads is increased to weld larger plastic parts, then welding capability for large constructions is improved, but modulation difficulties and synchronization control become more challenging
Solution Approach 1:
The patent divides the control system into independent segments, with each oscillating head having its own frequency converter. This segmentation allows each head to be controlled independently while still achieving synchronization through electrical coordination, making it feasible to manage a larger number of oscillating heads for welding extensive plastic part surfaces without overwhelming modulation difficulties.
Solution Approach 2:
By replacing mechanical synchronization mechanisms with electrical frequency converter control, the system can easily scale to accommodate more oscillating heads. The electrical control system manages the increased complexity better than mechanical systems, allowing the welding area to be expanded by simply adding more independently controllable oscillating heads.
3Reliability
If mechanically coupled oscillating heads are used, then synchronous operation is achieved, but flexibility in positioning and configuration is reduced
Solution Approach 1:
The patent replaces mechanical coupling with electrical control through frequency converters, which allows each oscillating head to be positioned independently without physical linkages constraining their arrangement. This enables flexible positioning and configuration adaptation to different workpiece geometries while maintaining synchronous operation through electrical signal coordination.
Solution Approach 2:
The system transitions from a static mechanical coupling structure to a dynamic electrical control system. The frequency converters can dynamically adjust the operation of each oscillating head based on positioning requirements, allowing the system to adapt to various configurations while maintaining synchronization, thereby improving positioning flexibility without sacrificing operational reliability.
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 ensures reliable plastic part connections by allowing multiple oscillating heads to operate in phase and amplitude like a single large head, overcoming modulation and constructive difficulties, and enabling flexible positioning for various workpiece geometries.
Implementation Method 1
Each of which is connected with one frequency converter or another suitable drive
Implementation Method 2
the plastic parts to be welded are rubbed against each other at certain contact surfaces. Through this friction, the melting temperature of the plastic of the parts to be connected is reached
Data Source
AI summary
The present invention relates to a method for vibration welding. The vibration welding is performed with a plurality of mechanically decoupled oscillating heads, each of which is connected with a frequency converter. An electrical circuit connects the frequency converters such that one of the frequency converters can be operated as the master and the other frequency converters as slaves. With the help of the controlling effect of the master, both a synchronous and a targeted asynchronous operation of the plurality of oscillating heads can be realized.