Rotary Head Drive Units for Surface Mounter Area Expansion
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Solution Overview
Problem
Existing component mounting devices require excessive time and have limited feeding and mounting areas due to the arrangement of drive units, which hampers efficient component placement on boards.
Innovation Solution
A component mounting device with a rotary head and a head transfer mechanism, featuring two holding member drive units arranged between the rotary body and the component feeding positions, allowing concurrent pickup and expanded areas for component placement, and a method to determine the optimal transfer times for these units to reduce overall mounting time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If two holding member drive units are arranged with the rotary body therebetween in the arrangement direction of component feeding positions, then the feeding area and mounting area are enlarged, but the device complexity increases
Solution Approach 1:
The patent transitions from a linear arrangement of drive units to a two-dimensional layout where drive units are positioned on opposite sides of the rotary body in the arrangement direction. This dimensional change allows the feeding and mounting areas to be expanded without proportionally increasing device complexity, as the drive units utilize space more efficiently around the rotary body.
2Productivity
If holding member drive units are arranged to concurrently pick up components, then the productivity is improved, but the device complexity increases
Solution Approach 1:
The component pickup function is segmented into two independent drive units operating on opposite sides of the rotary body. Each drive unit can independently pick up components, allowing concurrent operations that improve productivity. The segmentation enables parallel processing without requiring complex coordination mechanisms, as each unit operates autonomously within its designated zone.
3Area of stationary object
If the range of movement of the rotary head is kept fixed, then the device complexity is reduced, but the feeding area and mounting area are limited
Solution Approach 1:
The patent expands the feeding and mounting areas by utilizing the arrangement direction dimension rather than increasing the range of movement in the pickup direction. By positioning drive units on opposite sides of the rotary body along the arrangement direction, the system effectively doubles the available feeding and mounting zones without requiring the rotary head to traverse a larger distance, thus maintaining simple movement control while enlarging operational areas.
Data Source
AI summary
A component mounting device mounts electronic components fed at component feeding positions arranged in one line onto printed circuit boards, and includes a rotary head and a head transfer mechanism. The rotary head includes a rotary body, an N-axis servomotor that rotates the rotary body, pickup nozzles attached to the rotary body in a movable manner along a rotation axis, and two Z-axis drive units. The pickup nozzles are arranged on an imaginary circle centered at the rotation axis, and hold and release the electronic components. The Z-axis drive units move one of the pickup nozzles located at a predetermined driving position on the imaginary circle along the rotation axis. The N-axis drive units are arranged with the rotary body therebetween in a direction in which the component feeding positions are arranged. The head transfer mechanism moves the rotary head in a direction perpendicular to the rotation axis.