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Products
We supply full-category shock absorber components, including pistons, stampings, rubber seals, piston rods, springs, and self-developed banding/grooving machines.
Concave Ribbed Stamped Parts
Concave Ribbed Stamped Parts from XIAYI replace sharp stamping corners with smooth arc transitions, and lock rotation with three locating holes held to 0.02 mm. At our factory every station owns a written defect check — flaws are caught where they are born.
The Concave Ribbed Stamped Parts kit — a tapered deep-drawn inner sleeve plus a locating flange base — is formed on a 6-station progressive line with smooth arc transitions replacing the sharp corners that crack ordinary parts. Three evenly distributed locating holes lock the flange against rotation; the deep concave cavity wraps and protects the shock buffer rubber like a shell.
Structure: Lock, Wrap, Disperse
| Feature | Engineering Value |
|---|---|
| 3-hole anti-rotation locking flange | Three small locating holes engage sheet metal protrusions — circumferential sliding and resonance noise eliminated |
| Smooth arc enclosed deep-drawn cavity | Curved transitions remove stress-concentration corners — lower stamping cracking risk, full rubber wrap against silt, salt and rain |
| Widened thickened load-bearing flange rims | Spreads mountain full-load and high-speed vibration over a larger area — no local denting |
| Synchronously stamped coaxial through-holes | One-step hole forming keeps sleeve and flange concentric — no unilateral oil seal leakage |
Process Table: Where Defects Get Caught
| Process | Defect Interception | Performance Gain |
|---|---|---|
| Coil pre-treatment (spectrum 100%, leveling ≤ 0.01 mm) | Scrap coils with impurities or low ductility | No invisible drawing micro-cracks |
| 6-station multi-step deep drawing | Rework uneven walls, torn sleeves, deformed holes | Arc structure resists cracking under full load |
| 120 ℃ × 4 h stress-relief aging | Block unaged semi-finished goods | No seasonal springback, stable size all year |
| High-pressure air deburring + endoscope | Re-clean parts with residual scraps | No scratches on rubber or rod chrome |
| Tiered zinc passivation, online monitoring | Return under-plated work for re-plating | Long-term rust resistance inland & coastal |
| 24 h six-channel 3D optical inspection | Auto-sort mismatched kits and micro flaws | Zero defective delivery, stable store rating |
Dimensional Discipline
- Matched central hole coaxiality ≤ 0.025 mm — piston rod centered, oil seal wear sharply reduced
- Full-circle sleeve wall thickness ≤ 0.02 mm tolerance — no thin zones to collapse under mountain squeeze
- Flange flatness ≤ 0.02 mm; three locating holes held to ±0.02 mm diameter & circumferential symmetry
- Standardized arc transition radius — full interchangeability, zero jamming on automatic lines
FAQ
Q: Why three locking holes instead of friction or one big hole?
A: Three points define a circle — they lock the flange against rotation in every direction without over-constraining assembly. Single-point or friction-only designs creep under vibration and start to resonate.
Q: Our sleeves cracked at the corner radius. How is yours different?
A: Sharp corners concentrate forming stress. Our arc transition radius is a fixed, standardized die feature, formed across buffered stations so stress never concentrates — that is what the multi-station line is for.
Send your flange layout — get a 3-hole locking sleeve kit proposal
Ningbo XiaYi Electromechanical Tech Co., Ltd. forms concave ribbed sleeve-and-flange kits with per-station defect interception. Share your drawing for a tolerance-matched quotation.
About XIAYI interception discipline: each of the six stations owns a written interception rule — nothing advances to the next process until its checkpoint passes, so a defect is caught where it was born, not after plating.
Send Inquiry
Contact Info
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Address
No.209 Lane 520 Tongning Rd,Qianjiang Street,Jiangbei District, Ningbo City, Zhejiang Province, China
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Get a Tailored Quote for Your Shock Absorber Parts
Why Global Buyers Choose Ningbo Xiayi:
✓ IATF 16949 Certified — Defect rate strictly controlled below 0.1%.
✓ Full-Category Supply — Pistons, rods, springs, stampings & rubber parts.
✓ R&D Support — Custom powder metallurgy formulas & 7-10 day rapid prototyping.
✓ Proven Capacity — 50 million core pistons produced annually for global OEMs.
Ready to start? Complete the form below and our engineering team will respond within 24 hours with a custom recommendation.
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