Centrifugal Polisher

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This Centrifugal Polisher specially designed for precision small metal parts, focusing on the refined surface treatment of small-batch and multi-variety workpieces. It can realize damage-free chamfering, deburring and surface polishing of ultra-thin and ultra-fine precision parts, perfectly solving the industry pain points of easy deformation and low precision when processing special precision small parts with vibratory or flow-type processing equipment.

 

Driven by the reverse centrifugal movement of multi-barrels, the machine improves processing efficiency by more than 50% compared with traditional metal surface treatment equipment. It operates with no obvious noise and has a wide speed regulation range, adapting to the diversified polishing needs of small metal parts of different materials. With simple operation procedures, it is suitable for daily use in small and medium-batch precision processing scenarios.

(1) Overall Structure

Adopting a modular split design, it consists of five core components: upper protective cover, equipment base, barrel turntable assembly, electric control box and material receiving trough. All components are independently assembled and easily disassembled, resulting in low difficulty and cost for subsequent daily maintenance and overhaul.

• Upper Protective Cover: Made of steel welding technology, equipped with ventilation guide baffles and a sliding protective door with a built-in travel inductive switch that automatically cuts off power when opened, avoiding safety accidents from the operation end.
• Equipment Base: Pressed steel material with a motor position adjustment plate for flexible adjustment of belt tension. It also integrates a barrel turning mechanism and an inclined material receiving trough with a movable baffle inside, which can quickly separate processed materials from grinding fluid.
• Barrel Turntable Assembly: The core processing component is four groups of pentagonal barrels with replaceable polyurethane inner liners, featuring wear resistance, damage resistance and low replacement cost. The barrel covers adopt a buckle design with excellent sealing and water resistance, and the inner liners can be quickly disassembled and replaced through pressure plates.
• Electric Control Box: Cold-rolled steel material with an embedded installation design, which can effectively isolate dust and water vapor, protect internal electrical components from corrosion and extend the service life of control parts.

(2) Processing Principle

Driven by a motor, the main turntable makes a revolving movement, and at the same time, four groups of processing barrels are driven to make synchronous reverse rotation through gear set transmission. Under the dual centrifugal force of "revolution + rotation", the workpieces and grinding abrasives in the barrels form high-density strong frictional contact, replacing manual grinding operations to realize integrated processing of chamfering, deburring and surface polishing. The whole process ensures the processing precision of workpieces without deformation, scratches and with high uniformity of surface treatment.

Equipped with an international brand frequency conversion speed regulation device, supporting stepless and precise speed regulation. It can flexibly match the speed according to the polishing needs of small metal parts of different materials and sizes, with stable operation and no jamming.

Configured with inching control buttons, which can realize turntable forward inching and barrel forward/reverse inching respectively, flexibly adjust the barrel position, and facilitate feeding, discharging and position calibration during processing.

Designed with a two-way travel switch interlock circuit to form double operation protection: when the sliding protective door is opened, only the inching and turning functions can be activated to avoid misoperation of starting processing; when the protective door is closed and the equipment is in normal processing, the inching, turning and other functions are automatically powered off, eliminating operational risks from the circuit level.

(1) Installation Specifications

The equipment shall be placed on a level concrete floor, and the four feet of the equipment shall be padded and fixed to prevent equipment vibration and displacement during processing, which will affect processing precision and equipment service life.

After installation, test the insulation resistance of the motor winding with a 500V megohmmeter, the standard value is ≥0.38 MΩ. If the test fails, the motor shall be dried before power on.

Connect to 380V industrial three-phase power supply, confirm that the turntable rotates clockwise from the top view after power on, and do a good job of equipment grounding with a firm grounding line connection to ensure electrical safety.

(2) Post Commissioning

After long-term operation of the equipment, the belt tension of the motor can be adjusted through the adjusting screw on the base to ensure power transmission efficiency and avoid processing impact caused by belt slipping.

Regularly check the barrel turning chain, adjust the chain tightness by moving the reducer bracket to prevent the chain from slipping due to over-looseness and excessive wear due to over-tightness, and ensure the normal operation of the barrel turning function.

(1) Standard Operation Steps

Adjust the processing barrel to a 15° forward tilt state through the inching switch, loosen the barrel buckle, remove the barrel cover and prepare for feeding.

Workpieces must be degreased before feeding. Load workpieces and abrasives into the barrel at a ratio of 1:2, control the loading volume at 70% of the barrel volume, add an appropriate amount of grinding fluid and clean water to submerge the materials, then fasten and fix the barrel cover.

The equipment must be shut down after 90 minutes of continuous processing, replace the clean water in the barrel and cool the barrel to prevent the polyurethane inner liner in the barrel from accelerating aging due to high temperature and affecting the service life.

(2) Daily Maintenance Key Points

After the equipment has accumulated 500 hours of operation, fill all bearing parts with ZL-3 calcium-based grease to ensure the flexible operation of rotating parts.

Check the tension state of the motor belt and turning chain before starting the machine every day, and adjust in time if abnormalities such as slack and offset are found.

Confirm that the barrel locking rod is fully inserted and fixed after each feeding. If the barrel is not sealed tightly and liquid leakage occurs, adjust the positioning screw in time to ensure the sealing effect.

If abnormal noise occurs during processing, stop the machine immediately for inspection, focus on checking loose bolts and damaged bearings. If the bearings are damaged, replace them in time to avoid greater equipment damage caused by fault expansion.

Mainly applicable to hardware, electronics, precision machinery, auto small parts and other industries, carrying out surface treatment operations such as chamfering, deburring and surface polishing for small parts of conventional metal materials such as carbon steel, stainless steel and aluminum alloy.

Especially for small-batch, multi-variety, ultra-thin, ultra-fine and special-shaped precision metal parts that have poor processing effects in vibratory processing equipment, this equipment can realize damage-free and high-precision uniform processing, and is a special equipment for surface treatment of precision small metal parts.

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