This is the flange plate we manufacture for an automatic equipment company. The material is stainless steel and the process uses CNC wire drawing。This case covers customized stainless steel connecting flange plates in square and rectangular specifications. Each part features fully rounded outer corners, a large central through bore and symmetric mounting holes. They act as sealing, positioning and connecting bases for fluid pipelines, valve assemblies and automated equipment
Project Overview
Project Name | Precision CNC Machining Project for Stainless Steel Square & Rectangular Connecting Flange Plates |
Material | 304 Stainless Steel |
Material Color | silvery white |
Process | 3-Axis CNC Finish Milling |
Key Feature | Functional Performance: Fingerprint-resistant, oil-proof, compatible with soft sealing gaskets |
Dimensional Tolerance | ±0.020mm |
Surface Finish | Ra ≤ 0.4μm (fiber contact areas),Circular Grain Wire Drawing + Stainless Steel Anti-Corrosion Passivation |
Continuous Operating Temperature | 160°C |
Glass Transition Temperature (Tg) | 216°C |
Coefficient of Thermal Expansion | 17.3×10⁻⁶ /℃ |
Refractive Index | n≈2.8‑3.2, k≈3.8‑4.4 |
Dielectric Constant (1 MHz) | Complex value, frequency‑dependent, negative real part |
Dissipation Factor (1 MHz) | no |
Application | Fluid Pipeline & Water Treatment Equipment / Automated Equipment Connection & Sealing Modules / New Energy Battery Liquid Cooling Pipeline Components |
Double-Sided Grinding Datum Process：Ensure ultra-low flatness of the sealing surface and eliminate the risk of fluid leakage caused by uneven plate surfaces after gasket assembly.
High-Precision Symmetric Hole Position Control：The symmetry of the hole positions is strictly controlled, with a deviation not exceeding ± 0.015 millimeters, ensuring complete interchangeability during mass production.
Flat uniform global circular drawing:Customized rotary drawing fixture provides consistent circular texture on the entire surface of the sheet metal
Integrated stainless steel rust prevention workflow: vibration deburring, oil removal, and chemical passivation treatment to remove small metal debris from the holes. Form a strong anti-corrosion layer,
One-Time Full Rounded Corner Forming：All four outer corners are processed in one go through CNC arc interpolation function, ensuring the smoothness of the transition6.Stable Batch Production Consistency
Stable Batch Production Consistency：Standardized fixture positioning and fixed machining programs maintain stable dimensional repeatability across all production runs, eliminating size fluctuation between individual pieces.
Property | Benefits for automation link modules |
|---|---|
High structural strength & rigidity | Resist repeated plug‑in and impact load; prevent module deformation for stable structure |
Low thermal expansion coefficient (~17.3×10⁻⁶/℃) | Stable fitting clearance under temperature fluctuation, retain component positioning accuracy |
Excellent corrosion resistance | Rust‑proof under humid & oily factory conditions, extend module service life |
Good electrical & thermal conductivity | Guarantee reliable earthing, dissipate working heat and stabilize electrical connection |
Low moisture absorption & dimension stability | No swelling under humidity variation; consistent fitting dimension over long‑term operation |
Superior machinability | Suitable for turn‑mill & 5‑axis machining for complex threads, hex flats and special locating features |
Fatigue & wear resistance | Resist wear under frequent assembly cycles, maintain repeat positioning accuracy |
Versatile surface treatment option | Compatible with black oxide, TiN coating to enhance wear‑resistance, anti‑corrosion & appearance |
1.First Article Inspection (FAI) ：Complete full dimension measurement using calipers, micrometers, height gauges and CMM coordinate instruments; formal inspection report issued for customer confirmation prior
2.Flatness Sampling Test ： Dial indicator flatness inspection performed on all sealing surfaces; warped or out-of-tolerance plates are fully rejected.
3.Salt Spray Corrosion Resistance Test：48-hour neutral salt spray testing after passivation treatment, zero rust spots or oxidation observed on sample surfaces.
4.Sealing inspection: Conduct trial assembly with standard bolts and silicone gaskets to verify whether the seal is tight, without gaps or leakage risks.
5.100% Final Visual Inspection Before Shipment：Each piece is visually inspected for surface scratches, uneven wire drawing and residual hole burrs. Anti-rust oil is applied, and every plate is packed separately in moisture-proof plastic bags.
Self owned physical factory: self owned factory building, no middleman markup, fully controllable production process.
Strong CNC machining capabilities: Proficient in precision machining of complex parts such as turning milling composite and five axis linkage, capable of producing difficult structural components such as spirals, threads, and irregular surfaces.
Improve supply chain support: Integrate more than 200 upstream and downstream CNC supporting manufacturers, providing one-stop materials, surface treatment, and precision machining.
Batch quality stability: Standardized equipment and processing procedures, high dimensional consistency, complete interchangeability of parts, and strict control of tolerances.
Faster delivery speed: Supply chain collaboration+multi machine capacity reserve, shorten production cycle, and ship quickly.
Lower overall cost: self-produced+centralized procurement support, eliminating intermediate price differences, and providing more advantages in quoting for the same quality.
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