Suction Nozzle Mounting Head with Biasing Means
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Solution Overview
Problem
Existing electronic circuit component mounting technologies face challenges in minimizing contact impact during component placement, particularly with fragile components, due to the weight of the nozzle holding axis and the inability to detect contact sensitivity accurately, leading to potential damage and high machine costs for multiple sets of nozzle holding axes and suction nozzles.
Innovation Solution
An electronic circuit component mounting head with a biasing means between the raising/lowering member and the component holding tool, allowing the second raising/lowering driving device to engage directly with the component holding tool without an elastic member, enabling sensitive load detection and control of contact impact by adjusting the biasing force, thus minimizing damage to fragile components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a second raising/lowering driving device is provided between the rotating/raising/lowering axis and the nozzle holding sections to enable independent raising/lowering of the suction nozzle, then the contact impact can be controlled and fragile components can be mounted with high efficiency, but the weight of the moving object increases and the device complexity increases
Solution Approach 1:
The patent replaces the traditional mechanical raising/lowering mechanism with a voice coil motor, which is a type of linear motor that converts electrical energy directly into mechanical motion without mechanical contact. This substitution reduces the weight of the moving object while maintaining the ability to control contact impact precisely through electromagnetic force.
Solution Approach 2:
The patent changes the operating parameters of the voice coil motor to optimize performance, including controlling the current supply to achieve precise position control and impact mitigation. By adjusting electrical parameters rather than mechanical components, the system achieves fine control over contact impact with minimal added weight.
2Force
If an elastic member is interposed between the load cell and suction nozzle to provide biasing force, then the component holding tool can be biased up or down, but the detection precision of contact position deteriorates due to the elastic member interfering with sensitive detection
Solution Approach 1:
The patent introduces a magnetic field as an intermediary between the voice coil motor and the suction nozzle assembly. The magnetic field provides the necessary biasing force and control without physical contact, eliminating the interference that an elastic member would cause to the load cell's detection precision. The magnetic interaction allows force application while maintaining detection accuracy.
3Adaptability or versatility
If multiple sets of nozzle holding axes and suction nozzles are provided on the mounting head, then various types of components can be mounted, but the machine cost increases significantly
Solution Approach 1:
The patent designs the voice coil motor and nozzle holding mechanism to be universal and interchangeable. The same voice coil motor can be used across multiple nozzle positions, and the quick-change mechanism allows a single set of components to handle various component types. This multi-functionality reduces the need for multiple specialized sets of nozzle holding axes and suction nozzles, thereby lowering machine cost while maintaining versatility.
Solution Approach 2:
The patent implements a dynamic quick-change mechanism that allows rapid exchange of nozzle holding sections and suction nozzles. This dynamic capability enables a single mounting head to adapt to different component types without requiring multiple fixed configurations, reducing device complexity and cost while maintaining high adaptability.
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 configuration effectively mitigates contact impact by controlling the driving force sensitively, reducing the risk of damage to fragile components and allowing for efficient mounting while reducing the weight and size of the second raising/lowering driving device, thereby lowering machine costs.
Implementation Method 1
a second raising/lowering driving device which is raised/lowered together with the raising/lowering member by a first raising/lowering driving device and which raises/lowers the component holding tool relative to the raising/lowering member
Implementation Method 2
a biasing means which biases the component holding tool either up or down relative to the raising/lowering member
Data Source
Figure 1
Figure 2(a)~2(b)
Figure 3~4
AI summary
While maintaining high efficiency mounting electronic circuit components to a circuit substrate, makes it possible to avoid damage due to contact impact with a suction nozzle or circuit substrate. As well as rotating/raising/lowering axis 14 being held on head main body 12 as to be capable of rotation and of being raised/lowered, suction nozzle 22 is not capable of being rotated and is capable of being raised/lowered relative to that rotating/raising/lowering axis 14. Suction nozzle 22 is biased upwards with respect to rotating/raising/lowering axis 14 by a biasing means. Also, raising/lowering driving member 62 is held on head main body 12 as to be capable of being raised/lowered, and is raised/lowered by first linear motor 18. As well as first engaging section 64 of that raising/lowering driving member 62 being engaged with rotating/raising/lowering axis 14, and second engaging section 66 of second linear motor 60 held on raising/lowering driving member 62 being engaged with suction nozzle 22, and suction nozzle 22 being raised/lowered together with rotating/raising/lowering axis 14; suction nozzle 22 is lowered with respect to rotating/raising/lowering axis 14 against the biasing force of a biasing means; and in that state component 86 is mounted on a circuit substrate.