This translation adopts professional terminology consistent with the global hardware stamping industry, suitable for international stations, official websites and technical documents, with natural and fluent expression conforming to English business writing habits.

---

Precision deep drawn parts (also known as deep drawing parts) are one of the core process categories in the precision hardware stamping industry. Through the deep drawing process, metal sheets undergo plastic deformation under the action of a stamping press in specialized dies, forming high-precision three-dimensional structures such as hollow cylinders, cups, boxes, and flanges in one piece. This has become the mainstream solution for "producing hollow parts from sheet metal" in modern industry.

1. Process Principle: "Flow Forming" of Metal

Simply put, a flat metal sheet is pressed into the die cavity under the cooperation of the punch and die, and gradually drawn into a hollow three-dimensional part through the plastic flow of the material.

• Single-stage deep drawing: Suitable for shallow cup-shaped / cover-shaped parts
• Multi-stage deep drawing: Through gradual forming with multiple sets of dies, deeper and thinner-walled cylindrical parts (such as sensor housings and precision tube shells) can be produced.

Unlike processes such as blanking and bending, the core of deep drawing is the plastic flow of the material, rather than cutting or bending. Therefore, seamless one-piece structures with uniform wall thickness can be achieved.

2. Typical Application Scenarios

• Automotive Industry: Sensor housings, solenoid valve housings, battery pack housings, motor end caps, connector housings (compliant with IATF 16949 certification)
• Consumer Electronics: Battery compartment housings, precision connector shielding shells, audio equipment cavities, RF module housings
• Medical Devices: Medical-grade stainless steel deep drawn parts, such as sensor components, equipment housings, and sterile container parts
• Industrial Equipment: Filter housings, valve components, lighting housings, instrument housings, high-pressure fitting parts
• Home Appliances / Kitchen & Bathroom: Small inner tanks, heating tube components, bathroom hardware components

---

Bosi Hardware's precision deep drawn parts rely on mature multi-stage progressive deep drawing processes and high-speed continuous stamping lines to achieve one-piece plastic forming of metal sheets, with no welds or splices, completely eliminating the sealing and reliability risks associated with welded parts.We can stably achieve ±0.01mm level dimensional tolerance with high-precision control of wall thickness uniformity. Compatible with various materials including stainless steel (SUS304/301/430), copper (brass / red copper / nickel silver), aluminum, and low carbon steel, we support customized production of thin-wall parts (0.1mm-3mm), complex stepped parts, and irregular cylindrical parts.All products are controlled under the IATF 16949/ISO quality management system, with full-process quality control from die design and stamping forming to surface treatment (electroplating / polishing / black oxide finish), ensuring dimensional consistency and performance stability in mass production. They are widely used in industries such as automotive sensors, consumer electronics, medical devices, and industrial valves to meet high-precision and high-reliability requirements.At the same time, we provide one-stop services from drawing optimization and rapid prototyping to mass production, efficiently solving customers' complex structural deep drawing challenges.