Offset Joint Segments in Press Dies for Flat Surface Shaping
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Solution Overview
Problem
Conventional press die machines experience issues with the development of steps and gaps on the plate member due to deformation at joint portions between segments, leading to irregularities and reduced accuracy in pressing operations.
Innovation Solution
The press die machine is designed with first and second press dies formed by arranging segments side by side, where joint portions of one die are offset from those of the other die, preventing gaps and steps by ensuring that deformation occurs without aligning corresponding joint portions, thus maintaining a consistent surface during pressing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the plate member is pressed between both dies with segments aligned, then the pressing operation can be performed, but steps and gaps develop on the plate member due to deformation at joint portions
Solution Approach 1:
The patent applies asymmetry by intentionally misaligning the joint portions of segments between the upper and lower dies. The joint portions are positioned at different locations in the vertical direction, creating an asymmetric configuration that prevents simultaneous deformation at corresponding joint portions during pressing, thereby eliminating steps and gaps on the plate member surface.
2Ease of manufacture
If multiple segments are arranged side by side to form dies, then the die can be manufactured more easily, but joint portions between segments cause deformation and gaps during pressing
Solution Approach 1:
The patent utilizes segmentation by dividing both the upper and lower dies into multiple segments arranged side by side. This segmentation enables easier die manufacture while the patent resolves the associated joint portion issues through asymmetric positioning, thus maintaining both ease of manufacture and pressing quality consistency.
3Device complexity
If joint portions are aligned between upper and lower dies, then the die structure is simplified, but stress concentrates at joint portions causing steps to develop
Solution Approach 1:
The patent introduces asymmetry in the positioning of joint portions between upper and lower dies. Instead of aligning joint portions vertically, they are positioned at different heights, which distributes stress more evenly during pressing and prevents concentration of stress at specific joint portions, thereby maintaining surface uniformity.
Data Source
AI summary
Two press dies are formed by arranging a plurality of segments side by side to form die faces. The press dies are used to press a plate member. First and second joint portions are positioned differently between one of the press dies and the other of the press dies.