Laser Trimming Stamped Parts

Name: Laser Trimming Stamped Parts
SKU: 120

Laser Trimming Stamped Parts from XIAYI pair hollow weight-saving cutouts with radial reinforced ribs, drawn in one 6-station stroke from graded ST12 or ST14 steel. At our factory the full kit is 3D-scanned before packing, cutting slip, rib-crack and leakage failures by 73%.

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Product Description

The Laser Trimming Stamped Parts kit — matched large & small reinforced hollow bushings — is integrally formed on a 6-station progressive line from two grades of cold-rolled steel, ST12 and ST14. Precision-trimmed hollow cutouts cut weight, while radial thickened ribs carry the load. Cheap generic bushings use recycled scrap or thin Q235 sheet: hidden micro-cracks at the ribs break under bump load, the bushing slides offset, and oil seal leakage plus chassis rattle follow within 20,000 km.

Three Steel Grades, One Honest Table

Material Grade	Core Spec	Applicable Scenarios
ST14 high-ductile deep-draw steel	Elongation ≥ 40%, tensile 320 MPa, crack-free rib stamping	SUV, light trucks, coastal salt fog, mountain full load
ST12 general cold-rolled steel	Elongation ≥ 35%, tensile 280 MPa, standard stamping	Inland dry sedans, short-range EV commuters
Recycled scrap / thin Q235 (rejected)	Elongation < 28%, lamination & impurities, tensile ≤ 320 MPa	No compliant scenario — banned from vehicle assembly

Six Steps, Five Locked Indexes

Coil NDT & leveling — ST12/ST14 stored separately, 100% spectrum per coil, flatness ≤ 0.01 mm, elongation sampled every 2 hours; unqualified coils scrapped
6-station progressive forming — flanges, ribs and hollow locating windows shaped in buffered steps; rib roots thickened at a dedicated station
120 ℃ × 4 h stress-relief aging — residual stamping stress released to kill seasonal thermal springback; unaged parts blocked from downstream
Bidirectional air deburring — endoscope-verified, zero metal scraps to scratch the piston rod chrome coating
Graded blue-white zinc passivation — coating tiered by steel grade, thickness monitored online, thin parts re-plated
24 h six-channel 3D optical inspection — rib cracks, wall thickness, concentricity and coating scanned synchronously; 18-month traceable data

±0.02 mm

Rib wall thickness tolerance

≤0.025 mm

Central hole concentricity

−73%

Slip / rib crack / leak failure rate

Match the Grade to the Road

Working Environment	Recommended Grade
Inland dry, −30 ℃ to +95 ℃ urban roads	ST12 standard version
Coastal high-humidity salt fog, de-icing salt roads	ST14 heavy-duty version, mandatory
Mountain full-load high temperature, off-road	ST14 heavy-duty version, mandatory
Wide-temperature universal zone, −40 ℃ to +110 ℃	ST14 + full aging process

FAQ

Q: Why two steel grades instead of one "best" grade?

A: Because over-specifying costs you margin on city cars, and under-specifying destroys bushings on coastal or mountain routes. Grading lets each vehicle class pay only for the durability it needs — we confirm the grade with your market and load data.

Q: What documentation comes with each batch?

A: Steel spectrum reports, stamping PFMEA records, 3D coordinate dimension reports and salt spray reports ship with every batch — audit-ready for platform compliance checks.

Send your market and load profile — get the right steel grade kit

Ningbo XiaYi Electromechanical Tech Co., Ltd. supplies graded reinforced bushing kits with full batch documentation. Tell us the vehicle class and destination climate for a grade recommendation and sample.

About XIAYI grade discipline: ST12 and ST14 coils are stored in separate bins and spectrum-tested before they ever reach a press — a grade you order is a grade you receive, never a mixed substitute.

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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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Tel

+86-13586885132
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Email

sales@xiayiparts.com

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.

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