Component Joining Head With Inclined Laser Heating

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Solution Overview

Problem

Existing joining technologies for components to boards face inefficiencies in heating the joining material, leading to increased device complexity and cost, and laser light attenuation issues.

Innovation Solution

A joining work machine with a work head and laser light irradiation section that applies laser light from an inclined direction to the component and workpiece, using a horizontal drive mechanism to efficiently heat the joining material without significantly increasing device cost.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If laser light is applied from a vertical direction to heat the joining material, then the heating is effective, but the laser light attenuates significantly and heats unnecessary areas

Engineering Contradiction:

Improvejoining material temperatureVSAvoidlaser light attenuation

Core Design Contradiction:

TemperatureVSLoss of energy

Solution Approach 1:

The patent applies laser light from an oblique direction rather than vertically, creating an asymmetric irradiation pattern that concentrates energy on the joining material while avoiding unnecessary heating of surrounding areas. This asymmetric approach reduces laser light attenuation and improves heating efficiency.

Inventive Principle:

Principle #4Asymmetry

Solution Approach 2:

The patent focuses laser heating on the specific local area where the joining material is located between the component and workpiece. By directing laser light obliquely, the energy is concentrated precisely on the joining material rather than being dispersed over a broad vertical area, improving local heating quality.

Inventive Principle:

Principle #3Local quality

2Temperature

If a separate heating device is added to the component mounter, then the joining material can be heated effectively, but the device complexity and cost increase

Engineering Contradiction:

Improvejoining material temperatureVSAvoidcomponent mounter configuration

Core Design Contradiction:

TemperatureVSDevice complexity

Solution Approach 1:

The patent merges the laser light source into the work head of the component mounter, combining the mounting function and heating function into a single integrated device. This eliminates the need for a separate heating device while maintaining effective joining material heating capability.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The work head is designed to perform multiple functions: component pickup, positioning, and laser heating of the joining material. This multi-functional design reduces overall device complexity by eliminating dedicated heating equipment while maintaining all necessary capabilities.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Temperature

If there is a time lag between heating and joining operations, then the heating can be thorough, but the productivity decreases

Engineering Contradiction:

Improvejoining material temperatureVSAvoidjoining work speed

Core Design Contradiction:

TemperatureVSProductivity

Solution Approach 1:

The patent applies laser heating continuously during the component mounting operation rather than as a separate preliminary step. The laser light irradiates the joining material while the component is being positioned and pressed, eliminating idle time and maintaining continuous productive action throughout the joining process.

Inventive Principle:

Principle #20Continuity of useful action

Solution Approach 2:

The laser heating begins before the component is fully pressed onto the workpiece, pre-heating the joining material in advance. This preliminary heating action ensures that the joining material reaches the required temperature during the pressing operation itself, rather than requiring a separate heating step before mounting.

Inventive Principle:

Principle #10Preliminary action

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 efficiently heats the joining material while minimizing laser light attenuation and device complexity, maintaining a simple configuration and reducing costs.

Implementation Method 1

a laser light irradiation section provided in the work head or the horizontal drive mechanism and configured to apply laser light for heating a joining material that generates a predetermined joining force by being applied to one of contact surfaces of the component and the workpiece that are in contact with each other and being heated

Methodology Applied

Scientific EffectLaser heating: Laser

Data Source

PatentUS20250212375A1Joining work machine

Publication Date: 2025.06.26 FUJI CORP

AI summary

A joining work machine includes a work head including a component mounting tool configured to pick up a component and mount the component on a workpiece by being lifted and lowered along a lifting-and-lowering axis, the work head being configured to be driven in a horizontal direction by a horizontal drive mechanism, and a laser light irradiation section provided in the work head or the horizontal drive mechanism and configured to apply laser light for heating a joining material that generates a predetermined joining force by being applied to at least one of contact surfaces of the component and the workpiece that are in contact with each other and being heated, toward any one of the joining material, the component, and the workpiece from a direction inclined with respect to the lifting-and-lowering axis.