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{"title":"CNC Robotic Buffing Polishing Machine Stainless Steel Metal Sanding Grinding","imgUrl":"https:\/\/img.chinax.com\/nimg\/c5\/62\/506db2b475b0ff38f50d6c30555a-200x200-1\/cnc_robotic_buffing_polishing_machine_stainless_steel_metal_sanding_grinding_equipment_for_factory_workshop.jpg","attrs":{"Production Capacity":"Up to 50 pieces per hour","Machine Weight":"1500 kg","Dimensions":"2000 mm x 1500 mm x 1800 mm","Power Supply":"220V\/380V"}}
Force-Controlled CNC Polishing Machine for Zinc Alloy Castings
Plating-Ready Finish, Every Part
Built for zinc alloy (ZAMAK) die castings — the softest, most plating-sensitive cast metal in daily production. Deburr, grind and polish in one automatic cycle, with force control that never over-polishes, never burns, and delivers a surface your plating line will love.
Key Features
Force-controlled polishing — protects soft ZAMAK from over-polish & burning
Plating-ready Ra 0.1 µm — consistent pre-plate surface, fewer rejects
10-30 s cycle on small parts (handles, knobs, sliders, housings)
Auto load/unload — 1 operator runs up to 3 machines
The auto CNC polishing machine turns zinc alloy castings from "the hardest part of the plating prep line" into a one-pass, repeatable process.
Why Force Control Is Essential for Zinc Alloys
Real-time pressure compensation: ZAMAK castings often exhibit significant dimensional variations; force control adjusts contact pressure every millisecond, preventing over-polishing of localized excess material on the relatively soft alloy.
Controlled temperature: Spindle speed is synchronized with the feed rate, allowing frictional heat to be managed effectively—eliminating surface blackening and blistering.
Programmed consistency: Surface inconsistencies prior to plating are the primary cause of color variation; programmed polishing ensures every workpiece meets the "standard part" specification, significantly boosting the electroplating yield rate.
Automation and Flexibility
Automated loading/unloading: Small parts can be fed via vibratory bowls or feed tracks, with automatic unloading and counting; one operator can manage 2-3 machines.
Quick-change fixtures & program library: Supports mixed-line production of dozens of small zinc alloy parts, with changeover times of less than 10 minutes.
Micro-part clamping solutions: Specialized flexible fixtures are available for tiny components like zipper pulls and lock cores, ensuring no damage to the surface finish.
Q: Zinc alloy is very soft — how do you avoid over-polishing?
A: Real-time force control adjusts contact pressure thousands of times per second against casting tolerance, so soft ZAMAK parts keep their edges, corners and thin walls — no over-polish, no burning.
Q: Can it polish very small parts like zipper sliders?
A: Yes. Custom soft fixtures hold micro parts without marking them, and vibratory bowl feeding keeps the cycle running automatically.
Q: Our parts go to chrome plating — will this machine improve plating quality?
A: Directly. Plating defects like color mismatch and pitting usually start at inconsistent pre-plate surfaces. Programmed polishing makes every part identical before plating, typically lifting overall plating yield by 5-10%.
Q: We make dozens of small casting models — is frequent changeover a problem?
A: No. Each model is a saved program plus a quick-change fixture; changeover is under 10 minutes, so mixed-model runs don't stop the line.
Q: Can you give a cycle time for our parts?
A: Send the part drawing and target finish — we return cycle time, fixture plan and payback within 48 hours.
Q: Do you support turnkey integration with our existing plating line?
A: Yes — we can size the machine to your plating line's throughput and coordinate the upstream/downstream buffers so polishing never becomes the bottleneck.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer
Year Established:
2010
Total Annual:
150000-1000000
Employee Number:
80~105
Ecer Certification:
Verified Supplier
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