Metal Stamping Manufacturers

Yongji Precision Hardware Co., Ltd. is a Stamping Parts manufacturer producing precision metal stampings from 0.15 mm to 3 mm sheet on 80T–300T servo precision presses. Our stamping range covers RF shielding cans and covers, energy storage battery housings, conductive contact springs and terminals, keyboard positioning plates, busbars and equipment mounting brackets, supplied to OEM and ODM programs in electronics, new energy, telecom, display and industrial automation.

Stamping production runs at our Yangzhou and Vietnam bases, supported by in-house tooling, welding, ultrasonic cleaning, electroplating and painting. Engineering review, sampling and pilot runs are handled together with our Suzhou headquarters so that a drawing, a sample or a target application can move into stable mass supply without changing suppliers mid-project.

What Our Stamping Range Covers

Our stamping workshop is organized around thin-gauge forming: bending, drawing, coining, piercing and progressive-die blanking. Servo closed-loop control holds bending and deep-drawing tolerances at ±0.05 mm, which suits parts that must seat, clip, shield or conduct rather than simply fill space.

Product Range and Application Fit

The table below maps our stamped product families to the applications they are normally specified into and the material and finish choices that follow from those applications.

Materials and Forming Limits

Material selection follows the electrical, mechanical and corrosion duty of the part. Conductive springs need spring temper and controlled contact force; battery housings need drawability and sealing integrity; shielding cans need solderability and flatness across the seating face.

• Sheet thickness: 0.15 mm to 3 mm, from ultra-thin conductive shrapnel to thicker equipment brackets.
• Ferrous: cold-rolled steel, hot-dip galvanized steel, SUS301 and SUS304 stainless steel.
• Non-ferrous: aluminum plate, red copper, phosphor bronze spring strip, brass C2680/C2700.
• Forming tolerance: bending and deep drawing held at ±0.05 mm under servo closed-loop control.
• Press capacity: 80T to 300T servo precision presses with progressive die lines.

Where a stamped geometry cannot reach the required feature — deep eccentric grooves, micro holes, multi-step profiles — we route the part through our turning workshop instead, so the process choice follows the drawing rather than a fixed line.

Surface Finishing and Post-Processing

Stamped parts leave the press with sharp edges, forming marks and residual lubricant. Our finishing lines address conductivity, corrosion resistance and appearance in one sequence, with welding, ultrasonic cleaning, electroplating and painting available as integrated post-processing.

• Zinc plating, nickel plating and gold plating for contact and terminal parts
• Conductive passivation for shielding and grounding components
• Electrophoresis, sandblasting and anodizing for keyboard plates and visible brackets
• Automatic painting and ultrasonic cleaning for housings and structural parts
• Dacromet and zinc-nickel alloy plating for higher-corrosion environments

Quality Control and Acceptance Testing

Stamped parts are inspected in an enclosed precision testing laboratory that serves all four production workshops. The laboratory operates under IATF16949, ISO9001 and ISO14001 system standards, with all instruments third-party calibrated annually.

On request we issue material certificates, full-dimensional inspection reports, salt spray reports, mechanical test reports, RoHS certificates, 8D improvement reports and PPAP documentation. Sampling plans can be set to a customer's AQL standard, and testing procedures can be adapted to the internal inspection standards of overseas customers.

Tooling, Customization and Production Stages

Custom stamping starts with an engineering review of the drawing or sample: material, thickness, bend radii, hole-to-edge distances, tolerance stack and the assembly interface the part must meet. Tooling is then developed for the specific geometry, and we confirm the process route before committing to a die.

1. Prototype development — geometry and material validation before tooling investment.
2. Engineering validation — dimensional and functional confirmation against the specification.
3. Pilot production — process capability and inspection plan proven on the actual line.
4. Mass production — stable output on progressive die lines with ongoing patrol inspection.

Order quantities are flexible across these stages, so a validation batch and a production release can run on the same tooling and inspection scheme. Where a project needs a related part outside stamping — a fastener, a turned pin or a sheet metal enclosure — we produce it within the same group rather than splitting the build.

Information We Use to Configure Your Solution

To return a workable process route and quotation, we work from the following project inputs. Missing items are resolved during engineering review rather than assumed.

• 2D drawing or 3D model with critical dimensions and tolerance class marked
• Material grade and sheet thickness, or the performance requirement if the grade is open
• Annual volume, batch size and expected ramp profile
• Surface finish or plating specification, including salt spray target where relevant
• Assembly interface: mating part, contact force, sealing or shielding requirement
• Inspection and documentation expectations, including AQL and PPAP level
• Packaging format — bulk, tray, reel or customer-specific
• Destination and delivery scope for logistics planning

Frequently Asked Questions

What sheet thickness and tolerance can you hold on stamped parts?

We stamp 0.15 mm to 3 mm sheet on 80T–300T servo precision presses. Bending and deep-drawing dimensions are held at ±0.05 mm under servo closed-loop control, which covers most shielding, housing, terminal and bracket requirements.

Which materials do you process for contact springs and terminals?

Phosphor bronze, beryllium copper, SUS301 and SUS304 stainless steel, and brass C2680/C2700 are standard for spring and terminal work, with localized gold, nickel or tin plating applied where contact resistance or solderability matters.

Can you supply stamped parts on reels for automated assembly?

Yes. Continuous stamped contact springs, strip terminals, pin terminals and similar parts are produced on progressive die lines and can be delivered in reel form for reel-fed assembly equipment.

What documentation accompanies a stamping order?

Depending on the program, we provide material certificates, full-dimensional inspection reports, salt spray and mechanical test reports, RoHS certificates, 8D reports and PPAP documents. Inspection plans can follow your AQL standard.

Do you support prototype and pilot quantities before mass production?

We support prototype development, engineering validation, pilot production and mass production on the same tooling and inspection scheme, so the part validated at sampling is the part supplied in volume.