The Brinell hardness tester is widely used in the production of Brinell hardness values ​​of unhardened steel, cast iron, non-ferrous metals and soft bearing alloys due to its ability to measure a wide range of hardness values. This article takes the HB3000 Brinell hardness tester as an example to talk about some common faults and troubleshooting methods. 1. The cause of the fault caused by the load error exceeding ±1.0% or instability: (1) The blade of the force point is loose, and the blade should be adjusted and tightened; Mainly because the oil viscosity of the reducer is too small or too large, the reducer should be cleaned and the oil for the reducer should be replaced. 3. The measured hardness value is inconsistent with the standard hardness block indicating the cause of the failure and the elimination method: 4, the hardness tester repeated loading and unloading caused by the cause of this failure and troubleshooting: (1) The push button switch ejector pin is too long, the steering switch A, B contact and A1, B1 contact can not be disconnected, the length of the ejector pin should be adjusted and fixed; 5, the hardness tester load is fully stopped The cause of the failure is that the contact point of the reversing switch has burns and ablation, resulting in poor contact at the contact point. The contact point should be cleaned and polished or replaced with a new reversing switch. 6, the button switch is pressed, the hardness tester does not move, but there is a squeaky current sound The cause of this fault is that the motor is out of phase. Check whether the power supply is normal, whether the power plug is plugged in, whether the cable is open, whether the power switch is intact, whether the motor wiring is firmly connected, whether the motor coil burns out and the switch is touched. If the point contact is good, it should be excluded according to its situation. Touch Kitchen Faucets,Touch Kitchen Faucets Price,Touch Kitchen Faucets Product Yuyao Zelin Sanitary Ware Co., Ltd , https://www.zelinsinkfaucet.com
(2) The wear of the blade and the fulcrum of the force point will increase the load error to varying degrees, and the blade should be repaired;
(3) The position of the adjustment block on the load lever is not appropriate, and it can be moved forward or backward according to the situation.
(4) The compression spring is rusted, which increases the friction with the pressure shaft and the main shaft bushing. The rusted part should be cleaned and the oil should be replaced or replaced.
(5) The loading is not stable, there is shock vibration phenomenon, and factors causing instability may be excluded. 
2. The loading speed cannot be controlled within the specified time. The loading speed is too fast or too slow.
(1) The hardness tester is not installed horizontally, and the hardness tester should be adjusted to the level;
(2) The surface of the steel ball is not smooth or the diameter exceeds the tolerance, and the qualified steel ball is selected by using the micrometer; 7
(3) The error of the indentation measuring device is too large, and the allowable error of the indentation measuring device should be adjusted to make it ≤±0.5%;
(4) The weight cannot be placed vertically. The weight should be rubbed against the back cover of the hardness tester. Check whether the lifting ring is hung on the key cutting edge and whether the hanger boom is straight. Otherwise, the lifting ring should be hung on the key cutting edge. Hanger
(5) The verticality of the spindle and the test platform, the coaxiality between the spindle axis and the axis of the lifting screw is too poor. The verticality of the spindle and the test platform, the coaxiality of the spindle axis and the axis of the lifting screw should be analyzed according to the situation. .
(2) If the reversing switch is installed improperly, the movable baffle cannot touch the pin on the reversing switch, causing the reversing switch not to change direction. The installation position of the reversing switch should be adjusted.