Heated Press Plate Joining Furnace for Uniform Diffusion Bonding

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Solution Overview

Problem

Existing diffusion bonding processes face challenges in achieving uniform joining results across components due to variations in material properties, shape, and process parameters, leading to inconsistent strength and deformation, especially with complex designs or materials that require lower temperatures.

Innovation Solution

A high-temperature joining furnace equipped with a press plate heating device that distributes pressing force evenly and provides conductive heat, combined with a furnace heating device for radiant heat, to ensure homogeneous temperature distribution and reduced deformation, allowing for lower processing temperatures and faster processing times.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If conventional radiant heating is used in diffusion bonding, then the heating chamber can be heated, but uniform temperature distribution and reduced processing time are not achieved

Engineering Contradiction:

Improvetemperature distribution uniformityVSAvoidprocessing time

Core Design Contradiction:

Manufacturing precisionVSLoss of time

Solution Approach 1:

A press plate heating device is introduced as an intermediary component between the heating chamber and the workpiece. This device directly contacts the workpiece through the press plate, providing conductive heat transfer that ensures uniform temperature distribution across the joining surface while reducing overall processing time compared to conventional radiant heating alone.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces part of the thermal radiation heating mechanism with a conductive heating mechanism through the press plate heating device. This substitution allows for more efficient and uniform heat transfer directly to the workpiece, improving temperature distribution uniformity and reducing processing time.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Strength

If high pressing force is applied to achieve good joining, then joining strength is improved, but deformation of workpiece increases

Engineering Contradiction:

Improvejoining strengthVSAvoidworkpiece deformation

Core Design Contradiction:

StrengthVSShape

Solution Approach 1:

The patent changes the temperature parameter by providing localized heating through the press plate heating device. This allows the workpiece to be heated to the required joining temperature while applying pressing force, enabling good joining strength with reduced deformation compared to conventional processes that rely solely on high pressing force.

Inventive Principle:

Principle #35Parameter changes

3Shape

If lower processing temperature is used to reduce material deformation, then workpiece deformation is reduced, but processing time increases

Engineering Contradiction:

Improveworkpiece deformationVSAvoidprocessing time

Core Design Contradiction:

ShapeVSLoss of time

Solution Approach 1:

The press plate heating device acts as an intermediary that provides direct conductive heating to the workpiece. This allows for faster heating at lower temperatures, reducing both workpiece deformation and processing time compared to conventional radiant heating methods.

Inventive Principle:

Principle #24Intermediary (Mediator)

4Productivity

If conventional heating method is used, then heating chamber can be heated, but homogeneous temperature distribution and faster processing are not achieved

Engineering Contradiction:

Improvecomponent throughputVSAvoidtemperature distribution uniformity

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The patent substitutes conventional radiant heating with a conductive heating system through the press plate heating device. This substitution achieves homogeneous temperature distribution and faster processing, thereby increasing component throughput while maintaining manufacturing precision.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 solution enables uniform joining of diverse materials and complex designs with reduced deformation and operating costs, expanding the applicability of diffusion bonding to new materials and improving throughput.

Implementation Method 1

provides conductive heat

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 2

furnace heating device for radiant heat

Methodology Applied

Scientific EffectThermal radiation: Thermal Radiation

Data Source

PatentUS20260042166A1High-temperature joining furnace

Publication Date: 2026.02.12 PVA IND VACUUM SYST GMBH

AI summary

A high-temperature joining furnace is presented, which is designed for example for the diffusion bonding of joining materials such as metals, plastics, ceramics and corresponding workpieces. The joining furnace comprises a heating chamber, a workpiece holder arranged in the heating chamber for receiving a workpiece to be processed in the joining furnace, a pressing device arranged and adapted to apply a pressing force to the workpiece, wherein the pressing device comprises a pressing plate for uniformly applying the pressing force to the workpiece, and is characterized in that the pressing plate is equipped with a pressing plate heating device for heating the pressing plate and/or the workpiece.