Movable Forming Die for Tighter Heated Metal Corners

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Solution Overview

Problem

Existing forming devices struggle to reduce the round diameter of corner portions in formed products due to the size being uniquely determined by material characteristics and forming conditions, making it difficult to achieve smaller diameters.

Innovation Solution

The forming die is designed with intersecting first and second forming surfaces, where the second surface is movable relative to the first, allowing it to press and deform the metal material before hardening, enabling deeper penetration into the corner portion and reducing the round diameter.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If the metal material is heated and then formed using a conventional forming die, then the forming process can be completed, but the round diameter of the corner portion cannot be reduced below a certain size determined by material characteristics and forming conditions

Engineering Contradiction:
Improveround diameter of corner portionVSAvoidforming die structure
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

The forming die incorporates a movable second forming surface that can dynamically adjust its position relative to the first forming surface. This dynamic structure allows the die to change configuration during the forming process, enabling deeper penetration into the corner portion of the metal material to reduce the round diameter, while maintaining a relatively simple overall device structure through controlled movement rather than complex multi-component systems

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The forming process utilizes preliminary action by moving the second forming surface to press and deform the metal material at the corner portion before the material fully hardens. This timing strategy allows the material to be more pliable during the critical deformation phase, enabling greater reduction in round diameter. After forming, the material is then hardened to lock in the desired shape, combining the benefits of hot forming with precise corner geometry control

Inventive Principle:
Principle #10Preliminary action

2Manufacturing precision

If the second forming surface is made movable to press the metal material before hardening, then deeper penetration into the corner portion is achieved, but the device complexity increases

Engineering Contradiction:
Improvecorner portion deformation depthVSAvoidmovable forming surface mechanism
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

The forming die incorporates a movable second forming surface that can dynamically adjust its position relative to the first forming surface. This dynamic structure allows the die to change configuration during the forming process, enabling deeper penetration into the corner portion of the metal material to reduce the round diameter, while maintaining a relatively simple overall device structure through controlled movement rather than complex multi-component systems

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The invention changes the positional parameter of the second forming surface relative to the first forming surface during the forming process. By adjusting the distance and relative position between the two forming surfaces, the die can optimize its geometry for deep corner portion deformation. This parameter change approach allows flexible control of the forming action without requiring fundamentally complex device architecture

Inventive Principle:
Principle #35Parameter changes

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 configuration allows for a smaller round diameter of the corner portion in the formed product, overcoming the limitations of material and forming condition determinants.

Implementation Method 1

a heating unit that heats the metal pipe material by energization and heating

Methodology Applied
Scientific EffectJoule heating: Joule Heating

Implementation Method 2

during the forming, the second forming surface moves in a pressing direction in which the metal material is pressed

Methodology Applied
Scientific EffectMechanical compression: Compression

Implementation Method 3

forming a corner portion on the metal material, in a stage before hardening is performed

Methodology Applied
Scientific EffectPlastic deformation: Plasticity

Data Source

PatentUS12358037B2Forming device and forming method
Publication Date: 2025.07.15 SUMITOMO HEAVY IND LTD
  • US12358037B2 patent drawing
  • US12358037B2 patent drawing
  • US12358037B2 patent drawing

AI summary

Provided is a forming device that forms a heated metal material with a forming die, in which the forming die includes an angular portion formed by a first forming surface and a second forming surface that intersect each other in a cross-sectional view, the second forming surface is movable relative to the first forming surface, and during the forming, the second forming surface moves in a pressing direction in which the metal material is pressed in a stage before the angular portion and the metal material come into contact with each other.