Key Points for Daily Maintenance of Crawler-Type Shot Blasting Machine
Crawler-type shot blasting machines operate for long periods under high-wear and high-dust conditions. The quality of maintenance directly determines the equipment’s operational stability, service life, and workpiece processing accuracy. Daily maintenance covers three phases: before start-up, during operation, and after shutdown, focusing on real-time condition checks and basic upkeep. It typically takes no more than 15 minutes per day but effectively prevents unexpected failures. The following key points are compiled based on industry standards and practical experience for on-site operation and maintenance reference.
1. Pre-Start Inspection
Before start-up, carry out item-by-item checks to ensure the machine is in a safe standby condition. The crawler tension should be such that pressing the middle of the crawler with a finger results in a deflection of 10–20 mm, and the deviation should be ≤5 mm. The shot volume in the hopper should not be less than 2/3 of its capacity to prevent dry running and damage to the shot blasting wheel. The chamber sealing strips and rubber curtains must be fully fitted to prevent shot spillage and dust leakage. The pressure difference across the dust filter cartridge should be stable within 1200–1800 Pa to ensure effective dust collection.
2. Operation Monitoring
During operation, continuously listen to the machine and periodically inspect all key components. Ensure there is no abnormal noise; the temperature rise of the shot blasting wheel bearing housing should be ≤35°C and the maximum temperature ≤75°C; the gear reducer housing temperature should be ≤80°C; the shot blasting motor current should not continuously exceed 10% above the rated value; the crawler should run at a constant speed. Replenish qualified shot in time and remove impurities. Adjust relevant parameters based on workpiece processing results. Check the machine’s sealing. Operators must wear proper protective equipment. Any unsafe operation while the machine is running is strictly prohibited. If any abnormality is found, stop the machine immediately for troubleshooting.
3. Post-Shutdown Cleaning
After shutdown, disconnect the power supply. Allow the machine to cool down completely after it stops, then perform thorough cleaning and maintenance. Completely remove residual shot, dust, and debris from inside and outside the machine. Clean the dust filter cartridges; replace them immediately if damaged or clogged. Apply grease to metal transmission components such as drive chains and tensioner wheel bearings to prevent rust. Record the wear condition of wear parts such as blades, crawler, and protective liners. Fill out the maintenance log to provide a basis for scheduled maintenance and spare parts procurement.
By implementing the above daily maintenance procedures, unplanned downtime of the crawler-type shot blasting machine can be effectively reduced, along with lower failure rates and maintenance costs. The service life of wear parts is extended, the workpiece processing quality is kept stable and controllable, and reliable operating data is accumulated for subsequent scheduled maintenance and annual overhauls.
