Hot Press Product Bulging Positioning Hole
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Solution Overview
Problem
In hot pressing processes, positioning holes often deform or snag on positioning pins when the hot press product is removed from the mold, leading to difficulties in extraction and potential galling or clinging, which affects the accuracy and ease of removal.
Innovation Solution
The method involves forming a hot press product with bulging portions around positioning holes, which expand the inner diameter of the holes during press forming, preventing shrinkage and reducing the risk of deformation, thus ensuring easier removal and maintaining positional accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the positioning hole is used for positioning the material on the mold, then the positioning accuracy is improved, but the positioning hole deforms or snags on the positioning pin when the hot press product is removed
Solution Approach 1:
The patent applies preliminary action by forming the bulging portion around the positioning hole before the actual hot pressing and extraction process. This pre-formed bulge creates sufficient clearance between the positioning hole and positioning pin in advance, preventing snagging during extraction while maintaining positioning accuracy during pressing.
Solution Approach 2:
The patent applies local quality by creating a localized bulging portion only around the positioning hole area, rather than modifying the entire material. This localized deformation increases the inner diameter of the positioning hole specifically, providing extraction clearance where needed while preserving the overall positioning function and minimizing unnecessary material deformation.
2Manufacturing precision
If the material is pressed firmly between the upper and lower dies, then the forming precision is improved, but the positioning hole shrinks and deforms
Solution Approach 1:
The patent applies preliminary anti-action by pre-forming the bulging portion that counteracts the shrinkage and deformation forces during pressing. The bulge creates initial clearance and structural support around the positioning hole, resisting the compressive forces that would otherwise cause the hole to shrink or deform during the hot pressing process.
Solution Approach 2:
The bulging portion is formed in advance to create a protective structure around the positioning hole before the pressing operation. This preliminary structural modification ensures that when pressing forces are applied, the positioning hole maintains its shape and size due to the supporting bulge, thereby preserving positioning accuracy.
3Ease of operation
If the positioning hole inner diameter is increased to prevent snagging, then the ease of removal is improved, but the positioning accuracy deteriorates
Solution Approach 1:
The patent applies local quality by concentrating the diameter increase in a localized bulging portion around the positioning hole, rather than uniformly enlarging the entire hole. This localized expansion provides sufficient clearance for easy removal while maintaining the positioning function, as the bulge is positioned to preserve the critical positioning interface.
Solution Approach 2:
The bulging portion is formed in advance to create the necessary clearance for easy removal. By performing this expansion beforehand in a controlled manner, the patent achieves ease of removal without compromising positioning accuracy, as the bulge geometry is designed to maintain functional tolerances.
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 bulging portions effectively prevent deformation and snagging of positioning holes, allowing for easier extraction of the hot press product from the mold while maintaining positional accuracy and preventing galling, thereby enhancing the process's efficiency and reliability.
Implementation Method 1
a plate-like material 7 having a positioning hole 3 formed therein is heated
Implementation Method 2
the material 303 undergoes forced cooling while maintaining a state in which the upper die 307B is located at a bottom dead center. In this manner, quenching is performed on the material 303
Data Source
AI summary
Provided is a hot press product made from a heated material. In some cases, the product includes a bulging portion formed around a positioning hole, in which an inner diameter of the positioning hole, which shrinks when a temperature of the hot press product returns to room temperature, is increased by the bulging portion.