Key Points of Process Control for Stretching Hydraulic Presses

Today, Jianlong Hydraulic Technology will further share the key points of process control for general-purpose stretching hydraulic presses for your reference!

1. Speed Control

1.1 Idle Speed: Rapid descent for improved efficiency, typically ≥120mm/s

1.2 Feed Speed: Slow stretching to ensure quality, typically 5-25mm/s

1.3 Speed Switching: Automatic switching between fast and slow speeds via proximity switch

2. Pressure Control

2.1 Stretching Force: Main cylinder pressure, set according to material thickness and stretching depth

2.2 Blank Holder Force: Infinitely adjustable via hydraulic cushion to prevent wrinkling, typically 20%-40% of the main cylinder pressure

2.3 Holding Time: Adjustable from 0-999 seconds to ensure material plastic deformation

3. Position Control

3.1 Stroke Control: Precise control of the slider's bottom dead center position via displacement encoder

3.2 Repeatability: ≤±0.1mm, ensuring product consistency

4. Process Mode Selection

4.1 Constant Pressure Forming: Stops when pressure reaches the set value, suitable for pressure-sensitive processes

4.2 Fixed-stroke forming: The slider stops when it reaches the set position, suitable for processes with strict dimensional requirements.

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