Chip Mounter Back-Up Table Horizontality Control
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Solution Overview
Problem
Conventional back-up tables for chip mounters fail to maintain horizontality during upward movement, leading to uneven support of printed circuit boards and complicating the structure, thereby increasing manufacturing costs.
Innovation Solution
A back-up table design featuring a base plate, a back-up plate with link units or folding units, and serially connected driving parts, such as pneumatic cylinders, to adjust the height in a multistage manner, ensuring horizontality and simplifying the structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a pneumatic cylinder is used to raise/lower the upper table, then the back-up table can be operated, but the structure becomes complex and manufacturing cost increases
Solution Approach 1:
The back-up table is divided into a base table and a movable back-up table, with the movable portion further segmented into link units that can be independently controlled. This segmentation allows for simpler individual components while achieving the overall raising/lowering function through coordinated movement of segments.
Solution Approach 2:
The back-up table employs dynamic link units with pivoting connections that allow the structure to adapt during movement. The link units can rotate and pivot to accommodate the raising and lowering motions, providing operational flexibility without requiring a complex pneumatic system throughout the entire structure.
2Speed
If the upper table moves upward, then the printed circuit board can be raised to mounting position, but horizontality cannot be maintained and uniform support is lost
Solution Approach 1:
The back-up table is divided into multiple link units that can be independently controlled. Each link unit has pivoting connections that allow it to maintain proper orientation during movement, ensuring that the entire back-up table remains horizontal even as individual segments move to raise the printed circuit board.
Solution Approach 2:
The pivoting connections and link units act as intermediaries between the base table and the back-up table. These intermediary elements absorb and distribute the movement forces, maintaining the horizontal orientation of the back-up table while enabling the raising motion needed for component mounting.
3Ease of manufacture
If conventional back-up table design is used, then manufacturing is straightforward, but manufacturing cost increases due to complex structure
Solution Approach 1:
By segmenting the back-up table into standardized link units with repeated pivot connections, the design becomes more amenable to modular manufacturing. Each link unit can be produced using similar processes, reducing overall manufacturing complexity despite the functional requirements of the system.
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 design allows for precise height adjustment, reduces energy consumption, and decreases manufacturing costs by maintaining horizontality and optimizing the movement time of the back-up table, enhancing equipment efficiency and reducing maintenance costs.
Implementation Method 1
a pneumatic cylinder 3 installed at the lower table 2 to raise/lower the upper table 1
Data Source
AI summary
A back-up table for a chip mounter. The back-up table for a chip mounter includes a base plate, a back-up plate spaced a predetermined distance from the base plate to support a back-up pin that supports a printed circuit board, and at least one set of link units installed between the base plate and the back-up plate and facing opposite to each other. The back-up table further comprises a first driving part installed between the opposite facing link units and operating the link units to raise and lower the back-up plate, and a second driving part serially connected to the first driving part.