Wire Clamping Assembly Dynamics for Bonding Stability
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Solution Overview
Problem
Traditional wire clamping systems for fully automatic wire bonding machines face issues with wire retraction, vibration, and loose connections, leading to reduced efficiency and increased worker burden due to the lack of precise control over wire length and stability during bonding processes.
Innovation Solution
A wire clamping system with a pivotally connected assembly, a driving mechanism, and an elastic assembly that allows independent movement of the wire clamping assembly relative to the capillary, enabling controlled wire extension and clamping, thereby maintaining wire stability and preventing retraction even during vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the wire clamping assembly is kept open during tail creation, then the wire bonding process can be completed, but the metal wire may retract and pull towards the wire clamping assembly, causing instability
Solution Approach 1:
The wire clamping assembly is designed to dynamically change its state between open and clamped positions. During tail creation, it remains open to allow wire passage, then automatically clamps to secure the wire. This dynamic adjustment resolves the contradiction by providing ease of operation when open and wire stability when clamped.
Solution Approach 2:
The wire clamping assembly performs preliminary clamping action before potential wire retraction occurs. By clamping the wire in advance at the appropriate position, the system prevents wire instability and retraction issues that would otherwise require re-threading.
2Device complexity
If the traditional wire clamping system is used, then the structure is simple, but the system may vibrate and pull off the metal wire on the second bond, resulting in wire flying and reduced working efficiency
Solution Approach 1:
The wire clamping assembly can independently rotate and adjust its position relative to the capillary, creating a dynamic system that adapts during operation. This independent movement capability allows the system to maintain wire stability without requiring complex additional components, thus improving productivity while keeping device complexity manageable.
Solution Approach 2:
The wire clamping assembly performs self-adjustment through its pivotal connection and independent rotation capability. The elastic assembly provides automatic resetting without external intervention, allowing the system to maintain proper clamping position and prevent wire flying autonomously, thereby improving working efficiency.
3Stability of the object's composition
If the wire clamping assembly is fixed relative to the capillary, then the structure is stable, but the metal wire length cannot be precisely controlled and the wire may not extend properly outside the capillary
Solution Approach 1:
The wire clamping assembly is designed with pivotal connection to the wire clamping support, enabling it to rotate independently and adjust its position relative to the capillary. This dynamic adjustment capability allows precise control of wire extension length outside the capillary while maintaining overall system stability through the elastic assembly's resetting function.
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
The system improves the efficiency of wire bonding by ensuring stable connections and preventing wire flying, enhancing the firmness of bonds and reducing the need for re-threading, thus increasing the overall working efficiency of the wire bonding machine.
Implementation Method 1
an elastic assembly configured for resetting the wire clamping assembly
Implementation Method 2
a driving mechanism configured for driving the wire clamping assembly to rotate independently
Data Source
AI summary
A wire clamping system for fully automatic wire bonding machine comprises a base, a wire clamping support, a wire clamping assembly, a driving mechanism and an elastic assembly. The wire clamping assembly can move relative to the capillary, so that when the wire clamping system completes the second bond, the metal wire at the end of the capillary may directly extend out of the capillary by the independent movement of the wire clamping assembly and a length thereof can be effectively controlled, in order to form a metal ball in the next first bond. Furthermore, when the wire clamping system completes the second bond, the wire clamping assembly is in a clamping state, which avoids wires flying, even though the second bond is not firmly connected or the machine vibrates.