Introduction:
The four ball machine can be used to determine the anti-wear performance of lubricating oil and evaluate the load-bearing capacity of lubricants, including constant wear, maximum seizure load PB, sintering load PD, comprehensive wear value ZMZ, friction coefficient and friction curve.
Advantages of Four Ball Method:
Compared with other friction and wear testing methods, the four-ball machine method has higher similarity simulation for common friction pairs such as bearings, and is easy to achieve the standardization and consistency of pairs. It is often used to screen and evaluate lubricants. Four-ball test machine by replacing the friction pair, adjust the control parameters, can realize the simulation test of the actual working conditions, is the evaluation of lubricant wear resistance and distinguish its low, medium, high extreme pressure performance of the equipment.
Types of Four Ball Test Machine:
1. Lever Manual Four-ball Test Machine
2. Hydraulic Automatic Loading Four Ball Machine
3. Comparison of two types: the lever manual four-ball test machine has high loading accuracy and less influence factors. The hydraulic automatic loading four-ball test machine is labor-saving and easy to operate.
Parameters:
1. Embedded host performance:
1) NANO industrial motherboard with Intel-J1900 quad-core CPU as the control core
2) 64GB electronic hard drive
3) 4GB RAM
4) 19-inch high-definition LCD display, mouse and keyboard control
5) Support LAN, USB3.0, HDMI universal interface
6) Support RS232, RS485 industrial control interface
7) The four-ball machine test software supports saving the test results as an Excel format file.
2. Power supply: AC220V±10%, 50Hz
3. Total power of Four Ball Tester: 2200W
4. Spindle speed: 50r/min～3000r/min+5r/min, continuously adjustable
5. Variable speed mode: servo motor system control to achieve stepless speed regulation
6. Sample temperature control range: room temperature +5℃～120℃±0.5℃, set arbitrarily
7. Temperature display: real-time digital display
8. Heating method: automatic heating with heating belt
9. Loading control method: lever type
10. Axial test force range: 39.2N～10kN (about 4kg～1000kg)
11. Test steel ball: GCr15 steel ball special test steel ball for four-ball machine, nominal diameter 12.7mm
12. Friction method: sliding friction 13. Friction range: 0~1000g 14. Friction accuracy: ±1%
13. Pressure contact method: point contact type
14. Test force accuracy: +1%F.S.
15. Wear scar detection: high-precision electronic camera, computer imaging
16. Measurement resolution of wear scar: 0.0001mm
17. Measurement system: DMS-15 image processing system software and digital display measurement system
18. Wear scar measurement range: 0mm~4mm
19. Leverage ratio: weight side: working side is 10:1, 20:1 two levels
20. Time setting: abrasion test: 1min～300min, extreme pressure test: 1s～1000s, timing accuracy: 0.1S
21. Protection measures: automatic shutdown protection measures for sintering or overload
22. Power protection: automatic leakage protection device, effectively preventing accidents from happening
23. Measuring microscope: high-precision electronic camera, equipped with image processing system software and digital display measurement system; digital display division value is 0.0001mm
24. The test results can be saved in an Excel file, and multiple sets of test results can be stored. The test results can be viewed and backed up at any time, which is easy to operate.
25. Ambient temperature: 5～40℃; relative humidity: ≤85%
26. Host size: 1,000 × 650 × 1,700mm