China Closed Loop Robotic Buffing Machine For Precision Stepped Plug OD Shoulder Chamfer for sale

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Closed Loop Robotic Buffing Machine For Precision Stepped Plug OD Shoulder Chamfer

Name: Closed Loop Robotic Buffing Machine For Precision Stepped Plug OD Shoulder Chamfer
Brand: Zhejiang Kingstone Robot & Technology Co., Ltd.

Close Loop Robotic Buffing Machine for stepped plugs. Automatically buffs top face, OD barrel, shoulder step, and chamfer in one cycle. Closed-loop GU feedback ensures consistent finish, self-correcting for wheel wear and part variation. Protects precision ODs, eliminates shoulder ring marks, and removes concentric toolmarks without radial wipe.

Packaging Details WOODEN CASES

Supply Ability 200-300 SETS PER YEAR

Robot Cell FUNAC

Minimum Order Quantity 1

Cnc Or Not Not

Warranty 1 year

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Product Description

Close Loop Robotic Buffing Machine For Stepped Plug

A stepped plug looks deceptively simple: two cylinders, a shoulder, maybe a chamfer. But every face has its own surface geometry, wheel-to-surface angle, and finish requirement. The shoulder transition between faces is exactly where hand buffers either leave a ring mark or gouge the corner radius.

The LR-POLISH-B-SP is a closed-loop robotic buffing machine built around stepped plugs, shoulder bushings, valve-seat inserts and similar precision stepped-cylinder parts. It buffs the top face, OD barrel, shoulder step and chamfer in a single, programme-controlled cycle. Gloss-unit (GU) feedback closes the loop so every part leaves the cell at the same finish level, not dependent on operator performance.

Before and after comparison showing raw-turned stepped plug with toolmarks versus consistently polished mirror substrate

Closed-Loop Gloss Control

Every recipe carries a gloss target (GU) set from your customer's finish specification. After each completed cycle, the inline sensor measures the actual GU on the top face and OD:

GU within target band → pass, next part loaded
GU below lower limit → automatic correction pass (1 additional cut stage); re-measure
GU still below after correction → part flagged, data logged, operator notified

This closed-loop function makes the machine self-correct for wheel wear, ambient humidity, compound variation and incoming part condition without operator involvement.

Top-Face Concentric-Mark Removal

The lathe-turned top face carries concentric tool spirals. Buffing these out requires the wheel path to cross the spiral pattern, not follow it. The LR-POLISH-B-SP uses a spiral-outward robot path combined with C-axis part rotation at a controlled, offset speed — so the wheel always sweeps across the toolmark direction rather than along it. The result is uniform, direction-free surface on the top face.

Precision OD Protection

The stepped plug's OD and top-face datum often have tight tolerances (press-fit, sealing seat, mould guide). The cell's fixture design and force limit protect these surfaces:

Fixture backstop contacts only non-critical underside geometry
Force limits are recipe-capped per face to prevent measurable stock removal
Over-travel of the wheel to the OD is hard-limited by path boundary settings

Scenario Assumptions & Payback Drivers

Typical scenario includes 2 skilled buffers across 2 shifts dedicated to stepped-plug buffing.

Driver	Mechanism
Direct Labour	2 buffers replaced by 1 cell operator; night/weekend unmanned option
Rework Elimination	GU closed loop catches under-polished parts before plating/coating
Yield on Precision OD	Force-limited path prevents dimensional loss; eliminates scrapped plugs
Consumable Efficiency	Metered compound + wheel-wear compensation; no manual overloading
Traceability Premium	Automatic generation of per-part surface records for customer requirements

Frequently Asked Questions

What does "closed loop" actually mean on this machine?

After each part's buffing programme finishes, an inline gloss-unit (GU) sensor reads the surface. If the result meets the recipe target, the part passes. If it falls below target, the cell runs a correction pass automatically and re-measures. If still below, the part is flagged. The machine self-corrects for wheel wear, compound variation and incoming part roughness without operator involvement.

Can the machine remove lathe concentric toolmarks without leaving radial wipe marks?

Yes — the robot uses a spiral-outward path combined with C-axis part rotation at an offset speed, so the wheel always crosses the toolmark direction rather than following it. The result is a direction-free, uniform surface on the top face.

How does the cell handle the shoulder step without leaving a ring mark?

The wheel decelerates and re-angles before contacting the shoulder corner (soft-entry motion). Phase 1 (top face) and Phase 2 (OD barrel) overlap at the shoulder in a controlled handoff — the wheel is never dragged across the corner at full buffing force.

Will buffing remove material and change precision OD dimensions?

The cell's force limits and path boundaries are set so the wheel contacts only the surface roughness layer — not the base dimension. Maximum per-pass stock removal is minimal, well below any tolerance band. The fixture also protects the datum faces.