Every metal former knows the feeling. You've landed the order for a complex part — a deep stainless steel sink, an automotive oil pan with tight-tolerance flanges, or an aerospace component demanding flawless surface finish. Then wrinkling, tearing, or springback derails production. Complex deep drawing requires more than raw tonnage; it demands precision, control, and consistency.

At Delishi Hydraulic Machinery, we have engineered deep drawing hydraulic presses that don't just form metal — they solve the toughest manufacturing challenges. With over 28 years of expertise, we help automotive, aerospace, home appliance, and medical device manufacturers transform problematic runs into seamless, profitable operations.

1. Understanding the Challenge: Why Complex Shapes Break Standard Presses

Deep drawing forces a flat metal blank into a die cavity. Simple geometries are manageable, but complexity introduces:

• Varying wall thicknesses requiring different drawing speeds.
• Sharp radii & stepped geometries concentrating stress.
• High depth-to-diameter ratios beyond conventional limits.
• Advanced high-strength materials (HSS, stainless steel, titanium) with unique springback.
• Tolerances down to ±0.01mm — critical for mission-critical parts.

These factors lead to three defect categories that plague complex forming:

Mechanical presses deliver peak force only near bottom dead center; servo presses still have mechanical limitations. Hydraulic technology is fundamentally different. Delishi hydraulic presses deliver full tonnage anywhere in the stroke — ensuring consistent material flow, adjustable speed profiles, and independent blank holder force control.

2. The Hydraulic Difference — Precision Where It Matters Most

2.1 Full-Stroke Tonnage & Independent BHF Control

Unlike mechanical alternatives, Delishi presses maintain programmed tonnage from punch contact through dwell. Our independent cushion and drawing cylinder control allows fine-tuning of blank holder pressure dynamically, eliminating wrinkling/tearing tradeoffs.

2.2 Servo-Intelligent Advantage: 30–70% Energy Savings

Traditional hydraulics waste energy through throttle losses. Delishi’s intelligent servo-saving system supplies only the power required per cycle phase. Idle periods draw minimal energy; forming receives exact force needed. High-volume operations see immediate bottom-line impact.

2.3 Built for Continuous Operation & Safety

Delishi presses feature two-way cartridge valve systems, high-strength alloy steel columns, and automatic fault diagnosis with one-button reset. Standard infrared safety grating, Siemens PLC controls, and ISO/CE certification ensure operator safety and global compliance.

3. Materials Mastery: From Carbon Steel to Titanium

Different materials impose vastly different demands. Delishi presses adapt:

4. Industry Applications — Where Delishi Presses Excel

• Automotive — Fuel tanks, engine housings, body panels, structural brackets, oil pans. Delishi H-frame presses handle high-strength steels at high volume.
• Aerospace — Engine blades, structural brackets, hydraulic cylinders. ±0.01mm precision and controlled speeds prevent material fatigue.
• Home Appliances — Stainless steel sinks, cookware, washing machine drums. DKFS series eliminates surface marking & ensures consistent draw depth.
• Medical Devices — Surgical trays, implantable casings. Repeatability and overload protection safeguard expensive dies.
• Heavy Industry & Specialized Forming — Forging, cold extrusion, carbon fiber, powder metallurgy. Over 100 specifications from 10T to 5000T.

5. Delishi Product Series — Engineered for Complex Deep Drawing

DKFS Series — Servo-Guided Deep Drawing Press

Frame-type structure with precision guide rails, Siemens PLC + touchscreen, optical scale and pressure sensors, master cylinder forged for high reliability. Energy-saving servo drive, optional upper/lower ejector. Models from 35 to 420 tons, strokes up to 700mm, forming speed adjustable 14–40 mm/s.

DSFS Series — Four-Column Deep Drawing Press

80–2000 tons capacity, 50–70% energy savings via intelligent servo system, ±0.03mm repeat positioning, ±1 bar pressure precision, infrared safety grating. Low failure rate due to intelligent oil temperature management.

H-Frame Series — Heavy-Duty for Auto Parts

Distinctive H-shaped frame, two-way cartridge valve system, high reliability and minimal hydraulic shock. Ideal for heavy-duty automotive and metalworking sectors.

Additionally, Delishi offers C-frame single-column presses and fully custom automatic production lines with robotic integration.

6. Why Choose Delishi Hydraulic Machinery?

• ✅ Founded 1997 — 28+ years of hydraulic press innovation.
• ✅ Global components — Bosch-Rexroth hydraulics, Siemens/Mitsubishi electrics, NOK seals.
• ✅ Certification — ISO 9001, CE marked, with video outgoing inspection for every machine.
• ✅ Complete support — documentation, spare parts, remote troubleshooting, and optional on-site training.
• ✅ Exported to Europe & Americas — proven reliability in the most demanding markets.