Precision craftsmanship and quality assurance of HOWFIT DDH 400T ZW-3700

The manufacturing process of a press plays a crucial role in determining its performance and quality. This article delves into the manufacturing craftsmanship of the DDH 400T ZW-3700 high-speed precision press, focusing on body construction, slider design, and lubrication system to unveil its foundation for efficient and stable operation.

**Body Manufacturing:**

The DDH 400T ZW-3700 adopts a three-stage composite structure, tightened with twice the nominal force to ensure overall rigidity, with the deflection value strictly controlled at 1/18000 for superior stability. The body is constructed with high-quality alloy castings that undergo stress-relieving treatments, exhibiting excellent vibration damping performance to ensure long-term precision. Key components undergo finite element analysis for reasonable force distribution and minimal deformation, enhancing the machine's reliability and stability.

**Slider Design:**

The slider features a pre-stressed eight-face cyclical needle guide, complemented by a reverse symmetrical dynamic balancing system that effectively balances horizontal and vertical inertial forces during operation, ensuring smoother overall machine performance. The use of high-speed heavy-duty sliding bearings in connecting rods and six-point ultra-close support areas guarantees stability during stamping processes. This design enhances slider precision and longevity, contributing to prolonged mold life and durability.

**Lubrication System:**

To guarantee prolonged and efficient operation, the DDH 400T ZW-3700 employs a large-volume thin oil lubrication system and an airbag-type static balance system. The large-volume thin oil lubrication system efficiently dissipates heat generated during operation, maintaining stable precision at the bottom dead center. The airbag-type static balance system ensures reliable and stable operation, protecting transmission components from wear during mold height adjustments, ensuring the durability of the tooling mechanism.

**DDH 400T ZW-3700 Equipment Configuration and Parameters:**

1. Servo motor mold height adjustment

2. Inching positioning function

3. Digital mold height indicator

4. Two sets of misfeed detection

5. Single action with 0°, 90°, 180°, 270° positioning function

6. Main unit forward and reverse device

7. Hydraulic slider fixing device

8. Lubricating oil constant temperature cooling + heating device

9. Separated brake clutch

10. Independent electrical control box + mobile operating platform

11. Work light

12. Maintenance tools and toolbox

13. Eight-group batch control

14. Lubrication circulation pump station

15. Safety grating (front and rear, 2 sets)

16. Front and rear safety door device

**Specifications:**

- Nominal force: 4000KN

- Capability focal point: 3.0mm

- Stroke: 30mm

- Strokes per minute: 80-250s.p.m

- Closing height: 500-560mm

- Worktable area: 3700x1200mm

- Slider area: 3700x1000mm

- Adjustment amount: 60mm

- Material drop hole: 3300x440mm

- Motor: 90kw

- Upper mold bearing weight: 3.5 tons

- Feeding line height: 300±50mm

- Machine dimensions: 5960*2760*5710mm

**DDH 400T ZW-3700 Headstock Processing Technique:**

1. After casting is complete, undergo the first annealing.

2. Rough machining, followed by the second annealing.

3. Vibration aging treatment with manual interference achieves up to 98% elimination of internal stresses.

4. Precision machining follows.

5. Upon completion, use a laser tracker (American API) for inspection.

Through this in-depth exploration of the precision craftsmanship and quality assurance of the DDH 400T ZW-3700 high-speed precision press, it becomes apparent that its advanced manufacturing processes and innovative designs provide users with high-performance, efficient, and stable press equipment, delivering greater convenience and benefits to industrial production.