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ZJ044 multi-position turntable shot blasting machine
Overview and features
Overview: This product is a series of KNNJOO common standard shot blasting equipment. Depending on the workpiece can be non-standard design and manufacturing, test in the factory, sold after the meet the technical indicators. By shot blast strengthening, it can greatly improve the surface hardness of parts, improve the internal stress of the workpiece, get the purpose of strengthen, improve the fatigue strength of the workpiece; It also can remove the other rust on surfaces of the workpiece. ZJ044 machines have a variety of types, it is suitable for the workpiece need to shot blast on the side or top, such as rods, gear shaft, spur gear, diaphragm clutch, bevel gear; Or the workpiece need to shot blast both on the side and top, and two sets of blast wheel shot blast the worpiece on the side at the same time
| NO. | Item | Parameter | |
| 1 | Strengthen workpiece dimensions (diameter × H) | Max￠180×500mm | |
| 2 | Productivity ( workpiece φ300mm) | 20s/piece（Load capacity of each station:80Kg） | |
| 3 | Large turntable | diameter：Ø1600mm Step time 0.5-15min(Adjustable) | |
| 4 | Small turntable | diameter：Φ300mm Rotating speed 3r/min qty：8 piece | |
| 5 | Strengthen requirements | Test piece arc height 0.35A-0.5A Coverage≥180% Tooth portion effective area not less than 200% | |
| 6 | Abrasive | 0.6-1.5 (steel shot) | |
| 7 | Noise level | ≤93dB Compliance with standards GBJ87-85 | |
| 8 | Exhaust emission | ≤80 mg/m3 Compliance with standards GBJ4-73 | |
| 9 | Dust removal system (cartridge blowback) | total air volume：7800 m3/h | |
| 10 | Gravity settling system | it can settle tiny projectile which the dia is 0.2-0.5, prevent the steel shot sucked by fan | |
| 11 | 130 frequency conversion blast wheel (high speed powerful shot blasting) | qty×power×shot blasting amount：2×18.5kW×300 kg/min | |
| 12 | Air control shot supply valve | maximum shot supply amount：450kg/min | |
| 13 | Circulatory system (elevator, separation, transport) | Projectile circulation amount：45t/h | |
| 14 | power consume | Total power | about 70kW (Specific power need to meet the requirements ) |
| Total consumption of compressed air | 0.6 m3/min（If equipped with cartridge dust removal and air control valve） | ||
| 15 | Electrical Control System PLC control | PLC control, inverter, electric control boxes, testing organizations, cable wires, current meter, bridge and other components. | |
其他要求：
| NO. | Item | Specifications or requirements | Remark |
| 1 | Workpiece size | Pinion：L200-500mm、Φ30-100m chainring：L20-70mm、Φ50-250mm | |
| 2 | Projectile Specifications | CW23，0.6mm | |
| 3 | Projectile hardness | 52-55HRC | |
| 4 | Projectile hardness uniformity | 3HRC | |
| 5 | Part Material | 20CrMnTiH/20CrMoH | |
| 6 | Part hardness | 58-64HRC | |
| 7 | Parts layer deep | 0.5-0.8mm/0.6-1.0mm | |
| 8 | Part roughness | Ra1.6 | |
| 9 | Surface residual compressive stress | ≥450Mpa | |
| 10 | Compressive Stress at 0.02mm | ≥800Mpa | |
| 11 | Compressive Stress at 0.05mm | ≥900Mpa | |
| 12 | Coverage | ≥200% | |
| 13 | Beats | 0.5-1.5min adjustable | |
| 14 | Working noise | Less than 93db (Comply with standard GBJ87-85) | |
| 15 | Dust emissions | one meter around equipment≤5mg/m3 | |
| 16 | Arc height | 0.35-0.5A | |
| 17 | Steel shot winnowing | 0.2~0.5 steel shot can settling, it can reduce waste. | |
| 18 | Steel shot screen | Rotary vibration screening can separate large, medium and small steel shot, the screen can be replaced according to the size of steel shot. | |
| 19 | Steel Shot Flow | Adjustable, directly or indirectly reflect the relative flow of steel shot | |
| 20 | Blast wheel rotating speed | Stepless speed, directly reflect the size. | |
| 21 | count | PLC control, large turntable use step count. |
Process:
1. Preparation: First, manual control for electrical vibration sieve to separate projectile (which elevator opened; then put the workpiece manually on each small turntable.
2. shot blasting strengthening:
① Dust collector fan → elevator open → blast wheel open → rotation open → two air control shot supply gates open → begin shot blasting. blast wheel need to shot blasting in a period of time.
② two air control shot supply gates close → large turntable drive cylinder open. large turntable is rotated one station → two air control shot supply gates open (at the same time, the drive cylinder back into position, the operator load and unload the workpiece at the loading&unloading station)
③blast wheel continue to shot blasting a period of time. Recycled to step ② to continue working. In the above operation, it use automatic process control PLC for control, shot supply value open which is controled by electronically controlled gates, vibration sieve separate the projectile. After the work is completed, Dust removal system will clean the ash.
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