What should be paid attention to during the operation of the automatic sandblasting machine for burr treatment?

Matters needing attention in operation of automatic sandblasting machine for burr treatment

A, check before starting.

Air source system: check the pressure of air compressor and air storage tank to ensure that the air supply pressure is stable in the specified range of equipment; Check the trachea for air leakage, aging, bending and blockage, and the oil-water separator will drain water and remove oil in time to avoid oil pollution mixed with sand to damage the workpiece.

Sand system: the sand storage barrel has sufficient sand without caking, moisture and impurities; The screening screen is intact and undamaged, so as to prevent large particles from entering the spray gun and causing blockage.

Equipment body: the sealing door of the cabinet and the sealing strip of the observation window are intact, and there is no sand leakage and dust leakage after closing; Dust removal fan and dust removal bag are free from damage and dust accumulation; Conveying belt, roller and fixture are fastened without looseness.

Electrical safety: the emergency stop button is reset and the photoelectric induction switch is normal; The line has no skin damage and leakage; The grounding protection is reliable, and the electric cabinet is kept dry and dust-free.

Personal protection: Operators should wear dust masks, wear-resistant gloves and anti-static work clothes, and it is forbidden to wear short sleeves and slippers for operation.

Second, the equipment operation specification

It is forbidden to open the cover for operation: it is forbidden to start the equipment until the sealed door is completely locked, and it is forbidden to open the hatch during operation to prevent the sandblasting sand from flying out at high speed and injuring people.

Specification for workpiece placement: the workpiece is placed stably on the tooling/conveying line, and stacked, tilted and suspended workpieces are prohibited from getting on the machine; The thickness and size of the workpiece are in line with the processing range of the equipment, so as to avoid machine sticking.

Pressure and spray gun control: strictly adjust the sand blasting pressure according to the workpiece material, and prohibit ultra-high pressure long-time processing; The spray gun shall not be aimed at the human body, equipment glass and wires; When the spray gun is blocked, stop and relieve pressure before cleaning.

Real-time observation of working conditions: pay attention to the dust removal air volume, and stop immediately to check the filter bag when dust overflows; Pay attention to the circulation of sand, and make up the material in time if the sand is insufficient; Pay attention to abnormal sound, vibration and belt deviation of the equipment, and press the emergency stop immediately if it is abnormal.

Continuous operation control: equipment needs to be stopped and cooled regularly for long-term continuous processing; Thin parts and easy-to-deform workpieces can shorten the duration of single sandblasting and prevent deformation and surface erosion of workpieces.

Foreign matter handling: If the workpiece falls or gets stuck, it must stop, cut off the air source and release the pressure before taking the workpiece. It is forbidden to reach into the sandblasting cabin.

III. Matters needing attention in shutdown and closing

Normal shutdown process: firstly, turn off the air source of the sandblasting gun → idle the equipment to circulate the surplus sand → turn off the conveying system → turn off the dust removal fan → cut off the main power supply and turn off the air compressor.

Equipment cleaning: clean up the residual sand and workpiece debris in the cabin; Clean up the dust accumulated in the dust removal box, and clean up the residual sand and dirt on the filter screen and spray gun nozzle; Wipe the observation window to ensure clear sight.

Consumables inspection: the nozzle is seriously worn and the lining is damaged and replaced in time; Belt and roller wear exceeds the standard and should be reported for replacement in advance.

Site arrangement: collect scattered sand materials, recover and screen them, and centrally clean up the dust to keep the ventilation and dust removal system of the workshop normal.

Fourth, safety and daily taboos

Explosion-proof and fire prevention: when processing easily oxidizable metal workpieces such as aluminum and magnesium, regularly clean up dust and dust accumulation to avoid explosion caused by metal dust accumulation; Open flame and smoking are strictly prohibited in the workshop.

Unauthorized modification is prohibited: it is forbidden to raise the air pressure, lengthen the spray gun, and dismantle the sealing and dust removal device without permission.

Maintenance specification: Power and pressure must be cut off during equipment maintenance and internal cleaning, and a warning sign "Equipment maintenance is prohibited from starting" should be hung.

Environmental requirements: the equipment placement area should be kept dry and ventilated, and wet environment may easily lead to sand agglomeration and electrical short circuit.

Five, consumables and quality control points

Sand materials are screened regularly to remove broken fine powder and impurities. Too much fine powder will reduce the efficiency of deburring and increase dust.

Choose corresponding sand materials (white corundum, brown corundum, plastic sand, etc.) according to the material of the workpiece. Mixing sand materials will affect the deburring effect and the surface roughness of the workpiece.

Regularly calibrate the distance of the spray gun and the shooting speed, so as to avoid pits and size deviation caused by excessive sandblasting of the workpiece.