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Qingdao Puhua Heavy Industry QWD Series Mesh Belt Shot Blasting Machine Maintenance Guide - The Core Guarantee of Efficient Cleaning of Precision Parts

09 / Jul . 2025



/Daily maintenance: basic guarantee for precision equipment/


/Key operations after operation


Mesh belt cleaning: clean the residual projectiles in the mesh belt gap after each shift to prevent the conveyor chain from getting stuck (focus on cleaning the accumulated materials at the steering roller)


Shot blasting room inspection: open the inspection door to clean the rebound area of the guard plate to prevent large particles from wearing the blades of the blasting head


/Core system management


Mesh belt tension: daily manual pressure detection of sagging, if it exceeds 15 mm, the follower roller bolt needs to be adjusted


Projectile purity: stop the machine for cleaning when the iron slag thickness of the magnetic separator exceeds 2 mm, and replace it immediately if the single hole of the screen is damaged and the diameter exceeds 3 mm


/Lubrication standard


Special penetrating oil (ISO VG32) is dripped into the mesh belt chain every day, and high-temperature lithium-based grease is added to the bearing seat every week


/Periodic deep maintenance plan/


Period Maintenance focus Operation specification

Weekly 1. Shot blasting machine dynamic balance detection Vibration value exceeds 4mm/s Stop calibration

2. Pulse cleaning of dust filter cartridge Back-blowing air pressure 0.5 MPa

Monthly 1. Correction of belt deviation

2. Dust removal of inverter radiator

Quarterly 1. Comprehensive overhaul of shot circulation system

2. Electrical safety detection


/High-frequency fault handling solution/


/Thin-walled parts deformation


Cause: The projectile angle is too straight or the shot flow rate is too high

Handling:

Adjust the angle of the directional sleeve

Reduce the motor frequency of the shot blaster to below 35 Hz


/Mesh belt slippage


Cause: The rubber coating of the drive roller is worn or the tension is insufficient

Handling:

Replace the drive roller when the coating thickness is 5 mm

Adjust the tension cylinder pressure to 0.4 MPa




/Puhua Heavy Industry Special Service/


/Precision parts customization solution


Special nylon balls (diameter 0.2-0.6 mm) are provided for ceramic/aluminum alloy parts to avoid surface damage


/Global spare parts network


Mexico and Vietnam warehouses always have 8 types of vulnerable parts such as special mesh belts and ceramic guard plates (24-hour response for emergency shipment)


/Intelligent monitoring system


Optional vibration sensor module: real-time warning of mesh belt deviation, blasting head imbalance and other faults