Non-standard stainless steel hardware bending parts

Production Process: Core CNC Stainless Steel Sheet Bending + Customized Auxiliary Processes

The production of non-standard stainless steel hardware bending parts relies on precision CNC bending as the core process, paired with stainless steel-specific auxiliary technologies to ensure product performance and customization. The detailed steps of the metal sheet bending process are elaborated  as follows:

1. Step 1: Custom Design Confirmation & Raw Material Preparation - First, our technical team reviews clients' custom drawings (CAD/STEP/IGES files) to confirm key parameters (bending angle, dimension, load-bearing requirement, application environment). Select suitable stainless steel sheets (201/304/316/316L, thickness 0.8mm-8.0mm) based on the requirements. Conduct strict inspection on the raw materials: chemical composition analysis (to verify stainless steel grade purity), surface flatness check (no warpage) and thickness tolerance test (±0.05mm), ensuring compliance with industry standards (e.g., FDA for food contact, ISO 13485 for medical use).

2. Step 2: Pre-Bending Pretreatment for Stainless Steel - Cut the qualified stainless steel sheets into preliminary blanks using high-precision laser cutting equipment, matching the custom size requirements. Deburr the cut edges with mechanical polishing tools to eliminate sharp corners, preventing scratches and ensuring user safety. Clean the sheet surface through degreasing and passivation pretreatment: remove oil stains, oxide layers and dust to enhance bending precision and the adhesion of subsequent surface treatments. For thick stainless steel sheets (above 4.0mm), perform moderate preheating (60-90℃) to reduce bending stress and avoid intergranular corrosion.

3. Step 3: CNC Bending Parameter Setting & Clamping - Fix the pretreated stainless steel blanks on the workbench of our 35-400 tons CNC bending machines. Input custom parameters (bending angle, bending radius, number of stations, sheet thickness) into the intelligent control system. The system automatically adjusts the upper/lower die gap and activates angle compensation technology—specifically optimized for stainless steel's high ductility and strength—to ensure target bending precision (±0.5°). A trial bending is conducted on a sample blank to validate parameter accuracy and avoid batch defects.

4. Step 4: Multi-Stage Precision Bending Execution - The CNC bending machine performs step-by-step bending according to the preset program. For complex non-standard shapes (e.g., multi-angle brackets, U-type connectors, Z-type fasteners), multi-station bending is implemented sequentially. The machine's real-time monitoring system tracks the bending angle and sheet deformation during the process, making dynamic parameter adjustments to maintain angle repeatability (±0.1°). This staged approach ensures the structural integrity of stainless steel parts and avoids material fatigue.

5. Step 5: Post-Bending Inspection & Finishing - Remove the bent parts from the machine and conduct comprehensive inspection using a Coordinate Measuring Machine (CMM): verify overall dimensional tolerance (±0.1mm-±0.4mm), bending angle accuracy and surface quality. Non-conforming parts are reworked or re-bent. Perform secondary deburring and surface cleaning. For parts requiring enhanced corrosion resistance, conduct preliminary passivation treatment to form a protective oxide film on the stainless steel surface, preparing for subsequent custom surface treatments.

Auxiliary Processes (Customizable): Based on clients' application scenarios, we provide tailored auxiliary processes: ① Precision Welding: Use argon arc welding for structural reinforcement of complex non-standard parts (e.g., bracket nodes), ensuring weld seam smoothness and no oxidation. ② Custom Surface Treatment: Options include mechanical polishing (Ra≤0.8μm for food/medical), electropolishing, sandblasting or powder coating. ③ Drilling & Tapping: Process mounting holes and threads on the bent parts using CNC milling equipment, ensuring position accuracy (±0.15mm). All auxiliary processes are optimized to preserve the corrosion resistance of stainless steel.

Product Classification by Industry, Material & Non-standard Part Type

Key Technical Parameters (Precise & Customizable)

Our Core Competitiveness (Data-Driven & Credible)

• Professional Customization Technical Team: 15+ senior engineers with 10+ years of stainless steel bending experience; 24/7 technical support for custom design optimization (e.g., structure simulation, material selection); 7-12 workdays for custom mold development, specializing in solving complex non-standard bending challenges.

• Strong Production Capacity for Custom Parts: Equipped with 20+ sets of 35-400 tons CNC bending machines (optimized for stainless steel), paired with 20+ supporting laser cutting/argon arc welding/CNC milling equipment; annual production capacity of 4 million+ non-standard stainless steel bending parts; 99% on-time delivery rate for global orders.

• Strict Quality Management System: Full-process quality control (stainless steel grade verification → in-process bending precision monitoring → final corrosion resistance/dimensional test); 99.8% product qualification rate; certified with ISO 9001:2015, ISO 13485 (medical) and FDA (food contact).

• Integrated Supply Chain for Customization: Long-term strategic cooperation with certified stainless steel suppliers (e.g., Chalco, Tsinghua Unigroup); independent purchasing-processing chain ensures stable supply of high-purity stainless steel materials; 100% raw material traceability for custom orders.

• Global Shipping & Reliable After-Sales: Professional foreign trade team proficient in FOB/CIF terms; partnerships with DHL/FedEx/Maersk ; complete customs clearance documents (including material certification, custom part test reports) provided.  24-hour after-sales response for custom technical inquiries.

Credibility Enhancement

• Served 260+ B2B clients across 40+ countries (Europe, North America, Southeast Asia, Japan, Australia), including 18+ global well-known machinery, electronic and medical device manufacturers.

• Production Process Visualization: Provide live factory tours and detailed custom bending process recordings (parameter setting, multi-step bending, quality inspection) upon request; ISO/FDA-certified workshop welcomes on-site audits to verify customization capability and quality control.

• Third-Party Certification: SGS/TUV test reports available for stainless steel grade, bending strength, corrosion resistance (salt spray test ≥1500 hours for 316L) and dimensional accuracy; full batch test reports and raw material traceability certificates provided for every custom order.

• 4 consecutive years of 0 defect feedback for non-standard stainless steel bending parts cooperation; highly recognized for customization accuracy, product durability and professional technical support.

Send your non-standard stainless steel hardware bending parts drawings (CAD/STEP/IGES files) or detailed custom requirements (industry, dimension, thickness, surface treatment) now! We will provide a personalized process plan, quotation and sample proposal within 24 hours.

FAQ

Q1: How do you ensure quality?

A: We have a fully equipped quality inspection center, complete testing equipment, and a strict ISO 9001 quality management system. Each sheet metal stamping part is tested for dimensions, mechanical properties, and surface finish before delivery to ensure stable quality and compliance with international standards.

Q2: What are the prices of the Sheet Metal Stamping Parts?

A: Prices depend on several factors, including raw materials, tolerances,  surface treatments, and order quantity. Since Xinlongji Metal  owns and manages integrated stamping factories, we can provide competitive real-time quotations while maintaining stable product quality for every batch of custom sheet metal parts.

Q3: How can I get a better price?

A: All our prices are based on high-quality standards. With the same material and precision, our sheet stamping parts are more cost-effective because of supply chain integration. Larger orders or long-term cooperation projects can help you obtain even better prices and stable supply support.

Q4: What's the MOQ for Sheet Metal Stamping Parts?

A: MOQ depends on product size, complexity, and raw material type. You can send us 2D or 3D drawings, and we will evaluate production feasibility and confirm the MOQ. Xinlongji Metal guarantees flexibility for trial runs and supports small batches for initial testing.

Q5: What is your delivery cycle?

A: Delivery time is typically around 30 days. Complex parts or larger orders may require slightly longer schedules. Our integrated factories coordinate production, packaging, and shipment efficiently. In most cases, we can complete orders within 45 days while ensuring consistent quality and timely delivery.

Q6: What surface finishes do you offer?

A: We offer powder coating, galvanizing, anodizing, sandblasting, and more through long-term partnerships with surface treatment factories. Surface finishing choices depend on material, environment, and functional requirements. Xinlongji Metal provides the most suitable solution for every sheet metal stamping part based on its intended application.

Q7: Which countries do you ship to?

A: Qingdao Xinlongji Metal Manufacturing Co., Ltd. exports sheet metal stamping parts to more than 60 countries across Europe, North America, South America, Africa, and Southeast Asia. Our logistics team ensures timely shipping and helps clients manage customs procedures and freight costs effectively for each destination.

Q8: What size Sheet Metal Stamping Parts can you produce?

A: Our 800-ton punching machine supports various part sizes. The feasible dimensions depend on material, thickness, shape, and process complexity. You can send us 2D or 3D drawings (NDA available), and we'll evaluate production feasibility and provide a cost-effective solution for your project.

Q9: What information do I need to provide to get a quote?

A: Please provide:

2D/3D drawings or samples;

Quantity and delivery terms;

Material, surface treatment, tolerance, and weight.

The more detailed the information, the faster we can offer an accurate quotation for your custom sheet metal stamping parts project.

Q10: What payment methods and delivery terms do you support?

A: We support  T/T, and other payment methods. Delivery terms include FOB, CIF, and EXW. If you have specific requirements, we'll assess them carefully to ensure smooth cooperation and secure international transactions for all sheet metal parts orders.

Q11: Is  Xinlongji Metal  a factory, manufacturer, or trading company of Sheet Metal Stamping Parts?

A: Xinlongji Metal is a professional OEM sheet metal stamping parts manufacturer with strong factory resources and integrated supply chain management. Our team covers engineering, procurement, production, logistics, and after-sales to provide one-stop metal stamping solutions for global customers.