Hot Stamping Mold Air Adiabatic Layer Thermal Control

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Solution Overview

Problem

Hot stamping molds face challenges in uniformly distributing and minimizing the transition segment between high and low strength units due to adiabatic inferiority and thermal expansion, leading to poor dimensional precision and design specification satisfaction.

Innovation Solution

A hot stamping mold design featuring a cooling mold with coolant chambers, a heating mold with a heating cartridge and insert blocks forming an air adiabatic layer, and a position pin to regulate thermal expansion, reducing thermal conduction and ensuring uniform transition segment distribution.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If partial heating is used to produce high strength unit and low strength unit, then collision absorption performance and hardness are improved, but transition segment distribution becomes non-uniform and dimensional precision deteriorates

Engineering Contradiction:

Improvehardness and collision absorption performanceVSAvoiddimensional precision and transition segment uniformity

Core Design Contradiction:

StrengthVSManufacturing precision

Solution Approach 1:

A heat insulating space is introduced as an intermediary between the heating mold and cooling mold to control heat flow. This heat insulating space acts as a mediator that prevents excessive heat transfer to the cooling mold, thereby maintaining uniform temperature distribution and improving dimensional precision while still enabling the formation of high strength and low strength units through partial heating

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The thermal conductivity parameter of the mold system is changed by introducing a heat insulating space with low thermal conductivity between the heating and cooling molds. This parameter change allows better control over heat distribution, resulting in more uniform transition segment formation and improved dimensional precision while maintaining the strength benefits

Inventive Principle:

Principle #35Parameter changes

2Temperature

If heating mold is used to heat the steel sheet, then high strength unit is formed, but thermal expansion causes position change and dimensional precision deteriorates

Engineering Contradiction:

Improveheating temperature for high strength unit formationVSAvoiddimensional precision

Core Design Contradiction:

TemperatureVSManufacturing precision

Solution Approach 1:

The heat insulating space serves as a thermal barrier that mediates between the high-temperature heating mold and the cooling mold. It allows the heating mold to operate at high temperatures necessary for forming the high strength unit while preventing this heat from causing excessive thermal expansion that would compromise dimensional precision

Inventive Principle:

Principle #24Intermediary (Mediator)

3Temperature

If cooling mold is used to cool the steel sheet, then low strength unit is formed, but adiabatic inferiority causes non-uniform transition segment distribution

Engineering Contradiction:

Improvecooling temperature for low strength unit formationVSAvoidtransition segment uniformity

Core Design Contradiction:

TemperatureVSManufacturing precision

Solution Approach 1:

The heat insulating space acts as a thermal mediator between the heating and cooling molds, controlling the heat flow to the cooling mold. This ensures that the cooling mold receives controlled amounts of heat, allowing it to effectively form the low strength unit while maintaining uniform transition segment distribution through improved thermal management

Inventive Principle:

Principle #24Intermediary (Mediator)

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 enhances the uniformity and precision of the transition segment, allowing for precise formation of high and low strength units, improving dimensional accuracy and preventing mold deformation.

Implementation Method 1

a bottom part equipped on a bolster and a top part equipped on a slider, wherein the bottom part and the top part each may include a cooling mold including a plurality of coolant chambers formed therein

Methodology Applied

Scientific EffectHeat transfer: Conduction (thermal)

Implementation Method 2

a heating mold installed at a side of the cooling mold to form a formed surface together with the cooling mold and provided with a heating cartridge installed at a side of the heating mold

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 3

an air adiabatic layer is formed between internal sides corresponding to each other of the cooling mold and the heating mold

Methodology Applied

Scientific EffectThermal insulation: Thermal Insulation

Implementation Method 4

a position pin to regulate thermal expansion, reducing thermal conduction and ensuring uniform transition segment distribution

Methodology Applied

Scientific EffectThermal expansion: Thermal Expansion

Data Source

PatentUS9168578B2Hot stamping mold

Publication Date: 2015.10.27 HYUNDAI MOTOR CO LTD

AI summary

A hot stamping mold apparatus may include a bottom part equipped on a bolster and a top part equipped on a slider, wherein the bottom part and the top part each include a cooling mold including a plurality of coolant chambers formed therein, a heating mold installed at a side of the cooling mold to form a formed surface together with the cooling mold and provided with a heating cartridge installed at a side of the heating mold, and a plurality of insert blocks interposed between the cooling mold and the heating mold.