Precision Metal Stamping Parts Wholesale

Precision Metal Stamping Parts

-- Steady & Reliable Manufacturer --

Yuyao Hongli Optoelectronics Co., Ltd. is a premier OEM manufacturer of Precision Metal Stamping Parts, delivering high-accuracy custom components for the automotive, electronics, medical, and telecommunications industries. Operating from our modern 5,000-square-meter facility in Yuyao, Zhejiang, we utilize high-speed automated presses, optical sorting systems, and specialized tooling to manufacture parts from stainless steel, copper, brass, aluminum, and high-tensile alloys. Engineered to hold ultra-tight tolerances down to 卤0.005mm, our precision stampings meet demanding ISO and IATF standards. Partner with Yuyao Hongli for full DFM support, custom progressive die engineering, and scalable factory-direct contract manufacturing.

MANUFACTURING CAPABILITIES

Equipment and process capabilities

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

  • 01

    Micro-Precision Progressive Stamping

    Using ultra-precise progressive dies and high-speed presses, we execute multi-stage blanking, piercing, bending, and forming with extreme pitch accuracy and zero edge distortion.

  • 02

    Integrated In-Die Assembly & Tapping

    Our advanced stamping dies feature servo-driven in-die tapping and automated hardware insertion, completing threads and fasteners in a single continuous press stroke.

  • 03

    High-Speed Spring & Contact Forming

    We process thin-gauge spring steel, beryllium copper, and phosphor bronze into intricate electrical contacts and spring clips with consistent elastic recovery.

  • 04

    In-House Precision Tooling Fabrication

    Utilizing high-precision wire EDM and CNC grinding, our toolroom builds dies with tungsten carbide inserts to maintain dimensional stability across millions of cycles.

SPEC · Overview of Key Equipment Parameters

Equipment TypeTonnage / SpecificationMachinable MaterialTypical Processing Thickness
High-Speed Precision Stamping Press25T - 110T High-Speed PressStainless Steel, Brass, Copper, Bronze, Aluminum0.05mm - 2.0mm Precision Strip
Heavy Precision Servo Press110T - 250T Servo Motion PressCarbon Steel, HSLA Steel, Alloy Steel0.5mm - 4.0mm Continuous Coil
In-House CNC Tooling MachineryWire EDM, CNC Machining Centers, Surface GrindersSKD11, D2, Tungsten Carbide Tool SteelsSub-Micron Tooling Accuracy
High-Speed Optical Sorting Machine360-Degree Glass Disk Inspection SorterMicro Terminals, Pins, Precision Brackets100% Automated Defect Elimination
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.

3D CMM & Sub-Micron Optical Inspection

Ensuring absolute geometric fidelity across intricate, high-density metal components.

  • 3D Coordinate Measuring Machine (CMM) checking spatial GD&T tolerances down to 卤0.005mm.
  • High-resolution 2D optical profile projectors for rapid lot verification.
  • Laser micro-displacement sensors for 100% coplanarity checking on lead frames and contacts.

Material Integrity & Hardness Testing

Validating alloy purity and physical properties prior to high-speed production.

  • XRF Spectrometer (PMI) analysis to confirm raw material chemical composition.
  • Micro-Vickers hardness testing across formed radii and heat-treated zones.
  • Surface roughness profilometer checking (Ra values down to 0.1 碌m).

Plating Thickness & Environmental Testing

Confirming coating coverage and corrosion resistance under severe operating conditions.

  • XRF coating thickness measurement for gold, silver, tin, and nickel layers.
  • Neutral Salt Spray (NSS) corrosion testing per ASTM B117 (up to 960 hours).
  • Solderability testing (ASTM B545) for electronic PCB surface-mount terminals.
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
Selective Gold / Silver PlatingCopper Alloys, Beryllium Copper, Phosphor BronzeProvides ultra-low electrical contact resistance and superior signal integrity5G telecom connectors, micro-switches, automotive ECU pins
Matte / Bright Tin PlatingBrass, Copper, Carbon SteelEnhances solderability and protects base metal against atmospheric oxidationPCB terminal clips, power distribution lugs, battery connectors
Chemical Passivation300 & 400 Series Stainless SteelRestores passive oxide layer by removing surface iron contaminants for rust preventionMedical device components, automotive sensor brackets, fuel system parts
Electropolishing & Mass DeburringStainless Steel, Aluminum, CopperRemoves micro-burrs and creates a ultra-smooth, bright mirror finishSanitary hardware, decorative electronic trims, surgical inserts
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 Sensor & Electronics Housings

Ultra-precise stamped metal components built for harsh automotive operational environments.

  • Oxygen and position sensor mounting brackets
  • ECU lead frames and terminal connector pins
  • Electric vehicle (EV) battery management system (BMS) spring contacts

Telecom, 5G & Consumer Electronics

High-density micro-stampings engineered for miniaturized electronic devices and signal transfer.

  • 5G base station board-to-board spring contacts
  • Micro-USB and Type-C connector shielding cans
  • SIM card reader contacts and smartphone structural clips

Medical Devices & Precision Instrumentation

Biocompatible and high-tolerance precision stampings for medical and diagnostic equipment.

  • Surgical instrument internal spring clips
  • Diagnostic device probe contacts and battery contacts
  • Precision flow meter sensor housing plates
PRODUCTION / FACTORY ADVANTAGES

Factory production advantages

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

20+ Years of Precision Tooling Mastery

Yuyao Hongli brings over two decades of technical expertise in designing and maintaining complex progressive dies with micron-level tolerances.

Integrated In-House Manufacturing

Our facility combines tool fabrication, high-speed stamping, heat treatment, and surface finishing under one roof in Yuyao, Zhejiang.

100% Optical Sorting & Quality Assurance

Automated high-speed vision inspection equipment guarantees zero-defect shipments for high-volume automotive and electronic assembly lines.

CUSTOM MANUFACTURING PROCESS

Customized production process

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

  • 1. Print Review & DFM Tooling Design

    Engineers analyze 3D CAD models, evaluate springback and grain orientation, and design high-precision progressive dies.

  • 2. In-House Precision Tool Build

    Our toolroom utilizes wire EDM, CNC grinders, and carbide inserts to machine progressive stamping dies with micro-tolerances.

  • 3. Press Tryout & First Article Inspection (FAI)

    Trial stampings run on automated presses, undergoing complete 3D CMM inspection and capability studies (Cp/Cpk 鈮?1.67).

  • 4. High-Speed Mass Production & Plating

    Automated presses run high-volume production continuously, followed by selective plating, passivating, or heat-treating.

  • 5. Vision Sorting & Reel / Bulk Packaging

    Finished components undergo 100% optical sorting, are packaged in continuous tape-and-reel or protective cartons, and exported worldwide.

FAQ

Frequently Asked Questions

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

What tolerances can Yuyao Hongli achieve on precision metal stampings?

Utilizing tungsten carbide progressive tooling and high-precision servo presses, we regularly maintain tight tolerances down to 卤0.005mm.

What metals do you process for precision stamping?

We stamp stainless steel (304, 316, 430), copper, brass, phosphor bronze, beryllium copper, aluminum alloys, and cold-rolled steel.

Can you supply precision stamped contacts on tape-and-reel?

Yes, we provide carrier-tape and reel-to-reel packaging optimized for automated surface-mount (SMT) pick-and-place assembly.

What is the typical lead time for custom precision progressive tooling?

Custom progressive die design, fabrication, and FAI sample delivery typically take 25 to 35 days.

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 Precision Metal Stamping Parts Suppliers and Precision Metal 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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