เครื่องที่ใช้ควรเป็น Triple Action Press: Hydroforming

PRESS

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เครื่องที่ใช้ ควรเป็ น Triple action press

Advanced Forming Processes

HYDROFORMING

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Advanced Forming Processes

The Process - in four steps to the finished hydroformed part 1. Close die   The starting tube ‐ a straight or pre‐bent  tubular section ‐ is placed into a die which  has the contour of the component to be  produced. 

2. Fill with water  The die is closed and held closed by means  of a hydraulic press and kept under  pressure. Hydraulically actuated sealing  punches close off the tube ends and fill the  tube with the fluid medium, thus building  up internal pressure.    17

Advanced Forming Processes

3. Move horizontal cylinders, regulate water  pressure, move counter holder   In the actual forming process the material is  expanded. At the same time the sealing  punches compress the tube ends. This causes  the material to flow into the contour of the die.  A precise control of the internal pressure and of  the axial cylinder movement enables that the  material takes on the form of the internal die  contour and the component gets its final shape.    4. Open press, unload component  After hydroforming the hydraulic press  opens the die for unloading the  component  

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Advanced Forming Processes

Tube Hydroforming a

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e Faxial

Faxial P

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Advanced Forming Processes

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Advanced Forming Processes

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Open Model

Complete

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Advanced Forming Processes

Hydroformed Side Rails on a Truck Chassis

Hydroformed Exhaust Parts Hydroformed Cam Shafts have Lower Rotational Inertia and Require Less Machining 22

Advanced Forming Processes

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Advanced Forming Processes

ELECTROMAGNETIC FORMING EMF

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Advanced Forming Processes

Electro-Magnetic Forming

Operating principle of electromagnetic metal forming process 25

Advanced Forming Processes

Basic Methods of EMF

Compression forming

Expansion forming 26

Advanced Forming Processes

Basic Methods of EMF

Contour forming 27

Advanced Forming Processes

Electro magnetic actuator

Improve stamping operation

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• Improved Formability —at high velocity.

• Active control of springback

• Improved strain distribution

• Distortions at local features are minimized

• Reduction in wrinkling

• Local coining

Advanced Forming Processes

A demonstration of the ability to add character lines without distortion and/or wrinkling with full-size aluminum hood.

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Advanced Forming Processes

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Advanced Forming Processes