Ningbo Fenghua Bolong Machinery Manufacturing Co., Ltd. is one of the leading manufacturers and suppliers of deep drawing in China. Please feel free to buy durable deep drawing made in China here from our factory. All customized products are with high quality and competitive price.
Forming Capabilities
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Material Types |
Component Types |
Key Features |
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Carbon steels (AISI 1008, 20#, 45#, ST12) |
Shock absorber end caps, spacer rings, structural sleeves |
Seamless construction, uniform wall thickness, smooth internal surfaces |
|
Stainless steels (304, 316L) |
Battery cooling tubes, corrosion-resistant housings |
Scratch-free surfaces, consistent diameter, weld-free |
|
Aluminum alloys (5052, 6061, etc.) |
Lightweight tubular components, battery pack housings |
High draw ratio, weight reduction, uniform thickness |
|
Copper alloys (T2, H62) |
Conductive components, heat exchanger tubes |
Smooth internal surfaces, consistent wall thickness, high conductivity |
|
Tube Diameter Range: Φ10mm – Φ120mm |
Multiple drawing stages for complex profiles |
Wall thickness tolerance ±0.05mm, concentricity ≤0.1mm |
Process Specifications
|
Parameter |
Value |
|
Equipment |
Hydraulic deep draw presses with precision tooling |
|
Material Types |
Carbon steel, stainless steel, aluminum alloy, copper alloy |
|
Tube Diameter Range |
Φ10mm – Φ120mm |
|
Wall Thickness Range |
0.5mm – 5mm |
|
Wall Thickness Tolerance |
±0.05mm |
|
Concentricity |
≤0.1mm |
|
Secondary Operations |
Trimming, piercing, threading, CNC finishing |
|
Certifications |
IATF 16949, ISO 14001, ISO 45001, IECQ QC080000 |
Performance Highlights
Seamless one-piece construction
Deep drawing transforms blanks into finished components in a single continuous operation. The process eliminates weld seams and joints - improving structural integrity, pressure retention, and fatigue life.
Uniform wall thickness distribution
Precision tooling and controlled drawing parameters ensure consistent wall thickness across the entire component - critical for parts subject to internal pressure or requiring precise fit in assemblies.
Smooth internal surfaces
The drawing process produces internal surfaces free from machining marks, weld seams, or contaminants - essential for fluid flow applications and seal compatibility.
Multi-stage drawing for complex profiles
Components with variable cross-sections, stepped diameters, and reduced wall thickness are achieved through sequenced drawing operations - eliminating the need for welded multi-piece assemblies.
Broad material compatibility
We draw carbon steels (AISI 1008, 20#, 45#), stainless steels (304, 316L), aluminum alloys (5052, 6061), and copper alloys. Each material is processed with specific lubricants, tooling clearances, and speed control to optimize drawing performance.
IATF 16949-certified facility
Full PPAP Level 3 documentation available - process FMEA, control plans, capability studies - prepared to the same standard we apply to Tier 1 automotive customers.
Quality Control
Applications
Shock Absorber End Caps and Spacer Rings
Deep drawing is a critical manufacturing step for shock absorber end caps. The process produces components with smooth external surfaces and consistent dimensions, ensuring proper welding fit to the tubular shock body and reliable sealing against the fastening ring. For spacer rings and retaining rings, deep drawing delivers the precise internal diameters and flatness required for axial positioning in suspension assemblies.
Battery Cooling Tubes
Aluminum and stainless steel cooling tubes for EV battery thermal management systems are drawn to precise internal diameters and smooth surfaces - ensuring consistent coolant flow and efficient heat transfer.
Structural Tubular Components
Structural sleeves, mounting tubes, and chassis components are drawn from steel and aluminum - achieving the strength and dimensional accuracy required for automotive and industrial applications.
Conductive Components
Copper and brass conductive components are drawn to consistent wall thickness and smooth internal surfaces - essential for consistent electrical and thermal performance.
Beyond Automotive
|
Sector |
Typical Components |
Key Requirements |
|
Aerospace |
Fuel system components, structural housings |
Seamless construction, leak-proof integrity, material traceability |
|
Energy / Battery |
Battery housings, cooling tubes |
Thermal management, weight reduction, high-volume output |
|
Medical |
Surgical instrument components, implantable devices |
Precision, clean surfaces, biocompatible materials |
|
Industrial Equipment |
Sensor housings, mounting sleeves, hydraulic components |
Dimensional accuracy, pressure retention, durability |
Why Deep Draw Stamping
Welded assemblies have limitations: weld seams create stress risers and potential failure points. Machined tubes are constrained by starting wall thickness and generate significant waste. Deep drawing solves both problems:
Welded assemblies – multiple components joined by welding. Weld seams are potential failure points. Pressure retention is compromised.
Machined tubes – material removed from thick-walled stock. Material is wasted. Internal surfaces may require additional finishing.
Deep draw stamping – one blank, one process, one finished part. Seamless construction. Uniform wall thickness. Smooth internal surfaces. Material utilization is high - no weld joints, no machining waste.
For shock absorber end caps, spacer rings, cooling tubes, and structural tubular components - deep draw stamping is the production method.
Contact Us for Your New Project
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