Qingdao Puhua Heavy Industry Machinery Co., Ltd., leveraging over twenty years of technological accumulation, has developed the Q32, Q48, and Q58 series of overhead conveyor and accumulating chain shot blasting machines, providing mature mass processing solutions for industries such as automotive parts, railway locomotives, and construction machinery.
The Q32 series is suitable for small to medium-scale production, equipped with 2-4 shot blasters, with a single-hour processing capacity of 1-1.5 tons.
The Q48 series targets medium-batch needs, equipped with 4-6 shot blasters, increasing the processing capacity to 2-3 tons/hour.
The Q58 series is designed for large-scale continuous production, employing a layout of 6-8 shot blasters, achieving a processing capacity of 4-5 tons/hour.
The equipment adopts a combination of overhead conveyor and accumulation chain conveyor, with PLC precisely controlling the rhythm of each station. The accumulation function allows workpieces to remain at designated stations, ensuring that the internal cavities and grooves of complex structural parts are fully processed. The variable frequency speed control system can adjust the conveyor speed according to the characteristics of the workpiece, with a speed adjustment range of 0.5-4 meters/minute.
The shot blasting chamber performs three-dimensional spatial calculations based on common workpiece shapes, arranging the shot blasters to project shot from different directions. The directional sleeve window angle is adjustable within ±30 degrees, ensuring uniform coverage of all workpiece surfaces. A specially designed shot guide device achieves an overlap rate of over 30% in the blasting belt, eliminating blind spots.
Equipped with a double-layer vibrating screen, the upper screen has a 5mm mesh size, and the lower one has a 1mm mesh size, ensuring shot purity exceeding 98%. The magnetic separator uses rare-earth permanent magnets with a magnetic field strength of 1800 Gauss, achieving a 99.5% separation efficiency for ferrous impurities. The shot replenishment system automatically replenishes new shot based on actual consumption, maintaining a stable circulation system.
An automotive parts company uses the Q48 series equipment to process engine brackets, with a daily processing capacity of 3000 pieces. After 18 months of continuous operation, the workpiece surface cleanliness remained at Sa2.5 level, and the roughness was controlled within the 40-60 micrometer range, fully meeting the requirements for electrophoretic coating.
In the production of railway freight car parts, the Q58 series equipment enables continuous processing of bolsters and side frames. Compared to traditional processes, the processing time per piece is reduced from 15 minutes to 6 minutes, increasing production efficiency by 150%. The treated workpiece surface completely eliminates casting stress, extending fatigue life by three times.
Hydraulic valve blocks for construction machinery are processed using the Q32 series equipment, achieving the highest industry standard for internal cavity cleanliness. The equipment's specialized clamping system ensures that thin-walled workpieces do not deform during high-speed shot blasting, increasing the product qualification rate from 92% to 99.5%.
The equipment employs multiple energy-saving technologies: the high-efficiency direct-drive shot blaster saves 15% more energy than traditional belt drives; the frequency conversion control system automatically adjusts power output according to actual load; and the heat recovery device can recover 60% of the heat from the exhaust airflow. The dust removal system is equipped with flame-retardant filter cartridges with a filtration accuracy of 0.3 microns, resulting in an emission concentration of less than 15 mg/m³.
Qingdao Puhua Heavy Industry has established a three-tiered service system: regional service centers handle daily maintenance, the technical center provides process support, and the R&D center handles technical upgrades. Lifespan management is implemented for key equipment components, with replacements provided three months in advance. A remote diagnostic system analyzes equipment operating data in real time, identifying potential faults early.
With the advancement of intelligent manufacturing, next-generation equipment will integrate machine vision systems to automatically identify workpiece types and call upon corresponding process parameters. The application of IoT technology will enable predictive maintenance, with a fault prediction accuracy rate expected to reach over 95%. Low-stress shot blasting technology is being developed for lightweight components in new energy vehicles.
In the process of manufacturing transformation and upgrading, efficient and stable surface treatment equipment has become a key link in improving product quality. Qingdao Puhua Heavy Industry will continue to optimize product performance, help customers establish a competitive quality advantage through technological innovation, and provide equipment support for the high-quality development of the manufacturing industry.
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