Wire Clamp Driving Lever Pivot Abrasion
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Solution Overview
Problem
Wire bonding apparatuses experience partial abrasion of pivots due to displacement of the driving lever, leading to reduced reliability and increased maintenance costs.
Innovation Solution
A wire clamp design featuring a driving lever with a rhombus shape, where the effort point is connected in a straight line to the load point, bypassing the upper pivot, thereby isolating it from load transmission and reducing abrasion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the driving lever is connected directly to the upper pivot for load transmission, then the structural simplicity is improved, but the pivot abrasion increases leading to reduced reliability
Solution Approach 1:
The patent introduces an intermediary component (the specifically configured driving lever with rhombus-shaped opening) that mediates between the upper pivot and the clamping action. This intermediary structure redirects the load transmission path to bypass direct contact at the upper pivot, thereby reducing abrasion while maintaining structural coherence.
Solution Approach 2:
The driving lever is segmented into distinct functional zones: a first opening for receiving the upper pivot, a second opening for receiving the lower pivot, and a load point positioned away from both pivots. This segmentation allows independent optimization of each zone's function, enabling the load to be applied without directly stressing the pivots.
2Object-affected harmful factors
If the load point is positioned away from the pivots to reduce abrasion, then the pivot wear is reduced, but the force transmission efficiency decreases
Solution Approach 1:
The patent utilizes the two-dimensional plane of the driving lever to create an optimized force transmission path. By positioning the load point in a specific location within this plane and configuring the rhombus-shaped openings, the system achieves efficient force transmission without requiring direct alignment between the load point and pivots, thus reducing abrasion while maintaining power transmission.
Solution Approach 2:
The patent merges multiple functions into the driving lever structure: it serves as both the load-bearing component and the geometric guide for force transmission. The rhombus-shaped openings simultaneously define the pivot positions and guide the force vector, combining structural support and force transmission functions in a single integrated design.
3Ease of manufacture
If the driving lever uses a conventional direct connection to the pivot, then the manufacturing simplicity is improved, but the maintenance costs increase due to pivot wear
Solution Approach 1:
The patent incorporates the rhombus-shaped opening configuration and optimized load point positioning into the initial manufacturing design of the driving lever. This preliminary design consideration prevents pivot abrasion before it occurs, eliminating the need for future maintenance or repair of the pivots, thus achieving long-term ease of operation despite slightly more complex initial fabrication.
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 solution reduces partial abrasion of pivots, enhances the reliability and performance of the wire clamp, and decreases maintenance and replacement costs by minimizing damage during the wire bonding process.
Implementation Method 1
a spring in the driving lever and on an outer circumferential surface of the shaft, the spring configured to press the driving lever against the clamping lever
Implementation Method 2
A wire ball is formed on an electrode pad of a semiconductor chip
Data Source
AI summary
Disclosed are wire clamps and wire bonding apparatuses including the same. The wire clamp comprises a clamping lever, a driving lever parallel to the clamping lever and having an upper support, a shaft that penetrates a center of the driving lever to connect to the clamping lever, a spring in the driving lever and on an outer circumferential surface of the shaft, and an upper pivot that protrudes from an inner wall of the upper support to separate the upper support from the clamping lever. The driving lever has a load point and an effort point on opposite sides of the shaft. The effort point is connected in a direction of a straight line to the shaft and the effort point.