Stainless steel stretch part
I. Common Material Designations
• SUS304 / 301 / 201 / 316L / 430
• Material condition: Soft state, 1/2H, Fully hard (Soft state is preferred for stretching to avoid cracking)
• Material thickness: 0.2mm to 3.0mm. Customization available.
II. Dimension and Precision Standards
Shape dimension tolerance: ±0.03 to ±0.08 mm
2. Inner diameter / hole diameter tolerance: ±0.02mm
3. High tolerance: ±0.05mm
4. Flatness of the bottom surface: ≤ 0.04mm/100mm
5. Coaxiality, perpendicularity: ≤ 0.05mm
III. Stretching Process Performance
Forming method: Multi-station progressive die stretching, single process multiple stretching
2. Minimum stretching fillet: Starts from R0.3mm
3. Maximum stretching depth: Customized according to the ratio of material thickness to diameter. Supports both deep stretching and shallow stretching.
4. Process steps: Shearing → One-time stretching → Multiple times of secondary stretching → Edge cutting → Punching → Flanging → Integrated forming
5. No pull marks, no cracks, no wrinkles, and the mouth area is smooth without any frayed edges.
IV. Applicable Molds and Production Parameters
1. Matching molds: Precision stretching progressive die, Special stretching molding die
2. Applicable presses: 25T to 250T pneumatic/mechanical presses
3. Production speed: Regular 80 - 300 PCS/min
4. Batch processing capability: Supports small-batch prototyping and large-batch mass production
V. Surface Treatment Process
Original color cleaning, oil removal and deburring
Wire drawing, sandblasting, mirror polishing
Electrolytic polishing, passivation for rust prevention
Electroplating nickel, galvanizing, and oil spraying for anti-corrosion protection
VI. Product Features and Advantages
High corrosion resistance, excellent rust prevention performance, and high temperature resistance.
2. Good elasticity, stable stretching process, and不易break or wrinkle.
3. High dimensional consistency and good batch interchangeability
4. Excellent sealing performance, strong pressure resistance, and不易deform.
VII. Common Application Domains
Hardware shells, insulation cup accessories, electrical stretching shells, sensor shells, lamp stretching parts, auto parts hardware, kitchen and bathroom stretching accessories, precision sealing stretching parts, etc.