Deep Drawn Stamping Parts Wholesale

Deep Drawn Stamping Parts

-- Steady & Reliable Manufacturer --

Yuyao Hongli Optoelectronics Co., Ltd. is a specialized source manufacturer of Deep Drawn Stamping Parts, producing seamless cylindrical cups, sensor housings, solenoid shells, and deep drawn enclosures. Operating out of our 5,000-square-meter plant in Yuyao, Zhejiang, we utilize double-action hydraulic drawing presses, multi-station transfer presses, and specialized lubrication systems. We process draw-grade stainless steel (SUS304, SUS316L), aluminum, brass, copper, and cold-rolled drawing steel (SPCD, SPCE). Deep drawn stamping transforms flat metal blanks into complex 3D hollow shapes with high depth-to-diameter ratios, eliminating welds and providing smooth, leak-proof structural integrity. Trust Yuyao Hongli for custom die engineering, in-house annealing, and competitive factory-direct pricing.

MANUFACTURING CAPABILITIES

Equipment and process capabilities

From mold design to batch stamping, we cover production needs of different tonnages and precision levels.

  • 01

    Multi-Stage Progressive & Transfer Deep Drawing

    Using multi-station transfer dies, flat blanks are progressively drawn into deep, seamless tubular and rectangular shells without sidewall wrinkling or tearing.

  • 02

    In-Process Controlled Atmosphere Annealing

    We perform intermediate bright annealing in controlled atmosphere furnaces to relieve work-hardening stress, allowing extreme depth-to-diameter draw ratios.

  • 03

    Precision Beading, Flanging & Piercing

    Secondary die stations perform side-hole punching, flange trimming, bottom coining, and internal/external rib forming on deep-drawn shells.

  • 04

    High-Pressure Ultrasonic Degreasing

    Automated multi-stage ultrasonic washing systems remove drawing lubricants and oils, leaving pristine surfaces ready for plating or welding.

SPEC · Overview of Key Equipment Parameters

Koch
Equipment TypeTonnage / SpecificationMachinable MaterialTypical Processing Thickness
Double-Action Hydraulic Deep Draw Press80T - 250T Hydraulic Draw PressSUS304, SUS316L, SPCE, 3003 Aluminum, Brass0.3mm - 3.0mm Sheet Metal
Multi-Station Transfer Press110T - 200T Mechanical Transfer PressDeep Draw Grade Stainless, Steel, Copper0.4mm - 2.5mm Blank Diameter
Bright Annealing Conveyor FurnaceContinuous Hydrogen/Nitrogen AtmosphereStamped Stainless Steel & Steel CupsStress-Relief Heat Treatment
Ultrasonic Industrial Washing LineMulti-Tank Degreasing & Drying LineDeep Drawn Shells & Enclosures100% Surface Oil & Contaminant Removal
QUALITY CONTROL

Full-process quality control system

From incoming material inspection to full outgoing inspection, key processes are equipped with inspection points to ensure batch consistency.

Wall Thickness & Geometric Uniformity Audit

Verifying structural integrity and wall thickness retention throughout the drawn profile.

  • Laser micrometers and ultrasonic thickness gauges checking sidewall thinning limits.
  • 3D Coordinate Measuring Machine (CMM) inspecting concentricity, runout, and flange flatness.
  • Go/No-Go plug gauge testing for internal diameter and depth compliance.

Pressure & Hermetic Leak Testing

Ensuring drawn cups and housings are 100% leak-proof for fluid and gas containment.

  • Pneumatic underwater bubble testing for sensor and solenoid housings.
  • Helium mass spectrometer leak testing for sealed automotive and refrigeration caps.
  • Hydrostatic burst pressure testing on deep-drawn pressure vessel components.

Material Grain & Metallurgical Inspection

Monitoring material behavior to prevent stress cracking and orange-peel defects.

  • Microstructural grain size analysis before and after intermediate annealing cycles.
  • Micro-Vickers hardness profiling from cup lip to base.
  • Surface roughness measurement (Ra values down to 0.2 碌m).
SURFACE FINISHING

Surface treatment process

Depending on the usage environment and appearance requirements of the parts, we offer anti-corrosion, wear-resistant, or decorative surface treatment solutions.

Finishing ProcessApplicable MaterialPrimary FunctionTypical Application
Chemical PassivationSUS304, SUS316L Stainless SteelRemoves microscopic surface iron contaminants and restores corrosion resistanceAutomotive sensor housings, medical fluid cups, solenoid shells
ElectropolishingAustenitic Stainless Steel GradesSmooths micro-peaks, removes drawing marks, and creates a bright mirror shineSanitary pump housings, food grade vessels, decorative covers
Bright Tin / Nickel PlatingDeep Drawn Carbon Steel & BrassProvides excellent corrosion barrier, wear resistance, and attractive appearanceFilter cans, electrical motor housings, battery cups
Anodizing (Clear / Black)3003, 5052 Deep Draw AluminumForms a hard, corrosion-resistant anodic layer with color finishing optionsCapacitor cans, electronic enclosure cups, LED light housings
Note: The above is a standard process list. Specific film thickness, color, and salt spray resistance rating can be customized according to customer drawings.
APPLICATIONS

Main application areas

Our products are widely used in industries that require high structural strength and precision consistency.

Automotive Sensors & Solenoid Valves

Seamless, pressure-tight deep drawn shells engineered for high-performance automotive systems.

  • Oxygen sensor and temperature sensor protective housings
  • ABS braking system solenoid valve armatures and sleeves
  • Fuel injector cups and accumulator shells

Electronics & Electrical Enclosures

Shielded deep drawn cans and housings designed for electronic isolation and containment.

  • EMI/RFI shielding cans and transformer covers
  • Aluminum electrolytic capacitor cans and lithium battery cups
  • Relay housings and small electric motor stator shells

HVAC, Refrigeration & Fluid Controls

Corrosion-resistant seamless drawn vessels for fluid and gas regulation components.

  • Filter drier shells and refrigeration sight glass housings
  • Pneumatic pressure regulator caps and valve bodies
  • Water pump sealing cups and float valves
PRODUCTION / FACTORY ADVANTAGES

Factory production advantages

With its own factory and equipment, the company ensures stable delivery times and controllable costs.

20+ Years of Deep Draw Tool Engineering

Yuyao Hongli brings specialized expertise in draw ratio calculation, die radius polishing, and material flow control.

In-House Annealing & Cleaning Capabilities

Our integrated plant combines multi-stage draw presses, bright annealing furnaces, and ultrasonic cleaning under one roof.

Seamless Weld-Free Structural Strength

Deep drawn parts eliminate welded seams, providing superior pressure resistance, structural integrity, and lower production costs.

CUSTOM MANUFACTURING PROCESS

Customized production process

From receiving drawings to batch delivery, standardized processes ensure traceability at every stage.

  • 1. DFM Review & Blank Diameter Calculation

    Engineers calculate draw ratios, evaluate material ductility, simulate metal flow, and determine required draw stages.

  • 2. Deep Draw Tooling Design & Build

    Our toolroom machines hardened carbide draw dies and mirror-polished punches to prevent galling during deep drawing.

  • 3. Trial Drawing & First Article Inspection (FAI)

    Sample cups undergo multi-stage tryouts, wall thickness checking, helium leak testing, and customer sign-off.

  • 4. Mass Drawing, Annealing & Ultrasonic Washing

    Hydraulic presses draw parts continuously, with bright annealing between draw stages, followed by automated degreasing.

  • 5. Final Quality Audit & Export Packaging

    Parts undergo 100% pressure/leak testing, anti-scratch protective tray packaging, and secure export cartoning.

FAQ

Frequently Asked Questions

Here are some questions that clients often ask before cooperating with us.

What is the main advantage of deep drawn stamping over turning or welding?

Deep drawn stamping converts flat sheet metal into seamless 3D shapes, eliminating weak welded seams, reducing material waste, and drastically lowering unit costs for high-volume production.

What materials are best suited for deep drawn stamping?

Deep-draw grade stainless steel (304, 316L), aluminum (1050, 3003), brass (C2680), copper (C1100), and cold-rolled drawing steel (SPCD, SPCE) offer excellent ductility for deep drawing.

How do you prevent metal galling and tearing during deep drawing?

We use specialized high-pressure drawing lubricants, highly polished carbide dies, and perform intermediate bright annealing to relieve work-hardening.

Can you manufacture leak-proof housings with deep drawn stamping?

Yes, deep drawn parts are inherently seamless and 100% leak-proof, making them ideal for fluid, gas, and pressure-tight enclosures.

About Us
Yuyao Hongli Optoelectronics Co., Ltd.
Yuyao Hongli Optoelectronics Co., Ltd.
Yuyao Hongli Optoelectronics Co., Ltd. is a comprehensive enterprise with over 20 years of experience in the manufacturing industry. Located in the Yangming Science and Technology Industrial Park of Yuyao, Zhejiang Province, it enjoys convenient transportation and a solid industrial foundation. As a famous China Deep Drawn Stamping Parts Suppliers and Deep Drawn Stamping Parts Factory, founded in 2000, formerly known as Yuyao Hongli Optoelectronics Educational Instruments Co., Ltd., the company is wholly owned by a natural person, with Xie Gang as the legal representative. Its registered capital of 500,000 yuan has been fully paid up, and it has maintained its continued development through stable operations.
Relying on a 5,000-square-meter modern factory and multiple stamping workshops, the company has built a diversified product system. Its core businesses cover the manufacturing, processing and wholesale and retail of educational instruments, optical instruments, household electric heaters, small household appliances, auto parts, hardware and plastic products, etc. At the same time, it operates and acts as an agent for the import and export trade of goods and technologies, and its products are sold at home and abroad.
The company brings together industry management elites and senior engineers to form a mature R&D and management team. Adhering to the business philosophy of "integrity and pragmatism," it is committed to providing customers with high-quality products and comprehensive after-sales service. Leveraging its diversified portfolio, certification guarantees, and import/export advantages, the company actively expands cooperation both domestically and internationally, and is willing to establish long-term and stable trade partnerships with partners from all sectors, continuously striving forward in the wave of intelligent and high-end development in the manufacturing industry.
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