Press-Molded Product Plank Piece Positioning Mechanism
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Solution Overview
Problem
In press-molded products with hollow shapes, matching plank pieces can be challenging due to variations, leading to increased weight when flange parts are oversized to accommodate shape mismatches.
Innovation Solution
The solution involves forming a press-molded product by bending a blank into a first and second plank piece with a bending portion, incorporating punching and rising portions, and using a positioning mechanism where the rising portions of each piece engage to accurately align and match the plank pieces without excessive weight increase.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the flange part shape is largely formed to match plank pieces with variations, then the plank pieces can be matched with each other, but the weight of the component excessively increases
Solution Approach 1:
The invention divides the matching function into two segments: punching portions (through-holes) and rising portions (flanged edges). The punching portions provide primary positioning by fitting together, while the rising portions provide secondary positioning and support. This segmentation allows precise matching without requiring excessively large flange areas, thus controlling weight while achieving accurate plank piece alignment.
2Manufacturing precision
If a positioning portion is not provided, then the structure remains simple, but the plank pieces cannot be accurately positioned when bent
Solution Approach 1:
The invention merges the positioning function with the structural elements of the plank pieces themselves. The punching portions and rising portions are integrated into the plank piece geometry rather than being separate positioning components. This merging provides accurate positioning capability while maintaining relatively simple structure, as the positioning features are formed during the normal pressing process without requiring additional positioning devices.
3Manufacturing precision
If punching portions and rising portions are formed, then the plank pieces can be accurately positioned and matched, but the manufacturing process becomes more complex
Solution Approach 1:
The punching portions and rising portions are formed during the initial blank preparation stage, before the bending and assembly process. By preliminarily forming these positioning features in the flat blank, the subsequent bending and assembly operations become simpler and more accurate, as the positioning geometry is already established and does not require complex forming during the final assembly stage.
Data Source
AI summary
[Object] Provided are a press-molded product in which the plank pieces can be appropriately matched with each other and the weight of the product is not increased even when the plank pieces can be appropriately matched with each other, and a method of manufacturing the same.[Solving Means] The present invention is a press-molded product (100) formed by bending a blank (B) to divide the blank into a first plank piece (10) and a second plank piece (20) with a bending portion interposed therebetween and making the first plank piece and the second plank piece come into contact with each other through the bending. The first plank piece and the second plank piece include punching portions (11, 21) formed by punching the blank, and a first rising portion (12) and a second rising portion (22) formed by raising the rims of the punching portions. There is provided a positioning portion (40) that positions the first plank piece and the second plank piece by engaging the first rising portion of the first plank piece with the second rising portion of the second plank piece.