Shear forming and integrated beading & flanging for high-efficiency appliance manufacturing

Controlled forming of stainless-steel components for washing machines.

Reduced process steps, stable geometry and fully integrated forming operations in a single machine.

 

The Challenge

Manufacturers of industrial and domestic washing machines face high production demands combined with strict dimensional and functional requirements.

Key components such as drum panels, tubs, lids and trim rings are traditionally produced through multiple forming and secondary operations, often involving:

• Press forming and deep drawing
• Multiple trimming and finishing stages
• Separate flanging and beading operations
• Multi-handling and intermediate storage requirements

This approach leads to:

• Complex and fragmented production flows
• Increased labor and handling costs
• High-cost tooling investment
• Limited flexibility across part variants
• Accumulated dimensional deviations between operations

The objective was clear: Simplify the manufacturing process while maintaining precision, flexibility and industrial productivity.

 

The DENN Solution

DENN developed a fully integrated forming strategy combining shear forming with secondary shaping operations on CNC spinning machines.

The process starts from stainless steel blanks or preforms, positioned and clamped onto a mandrel.

The key transformation is achieved through shear forming:

• The forming roller progressively shear forms the material over the mandrel
• Material flows inward under controlled forming conditions
• Neck geometry is generated in a single pass
• Wall thickness is reduced and redistributed with precision

Once the primary geometry is formed, additional operations are seamlessly integrated within the same setup:

• Beading for structural reinforcement and stiffness
• Flanging to generate functional edges and assembly interfaces
• Trimming, chamfering and beveling for final geometry definition
• Optional marking operations

All operations are performed in a controlled and continuous cycle:

• No part transfer
• No intermediate handling
• No loss of positional accuracy
• Optional marking operations

The result is a fully engineered forming process rather than a sequence of independent operations.

 

The Result

The integrated shear forming and shaping approach delivers clear industrial advantages:

• Single-machine manufacturing process
• Significant reduction in handling and intermediate operations
• Lower tooling costs compared to conventional stamping and pressing
• High flexibility across diameters, thicknesses and material grades
• Stable dimensional accuracy based on mandrel definition
• Reduced noise levels compared to traditional press operations
• Lower labor requirements with single-operator capability
• Improved production efficiency and process stability
• Manufacturers achieve a cleaner, more compact and more controllable production environment

 

Why It Matters

In high-volume appliance manufacturing, efficiency is not only about speed, but also about process simplification and control.

By integrating shear forming with beading and flanging in a single platform, manufacturers eliminate unnecessary steps, reduce variability and gain full control over material behavior.

At DENN, we do not separate forming operations.
We integrate them into stable, efficient and scalable production processes.