莱州市试验机金刚石工具厂

 在使用洛氏硬度计的过程中,如果显示值不对，那么造成这种因素的原因有很多，现在我把一常见故障的分析和排除总结为以下九点：

　　1、在给洛氏硬度计加预负荷初，指针发现有抖颤动的情况。主要原因是平键升降丝杆的压槽配合有间隙。只要拧紧硬度计的平键紧固螺丝或更换即可。

　　2、主负荷加载完成后，硬度计指针有颤动情况，造成这种情况的原因可分三种，一砝码托盘上有油。二缓冲器相对工作台不平衡。三硬度计机身不水平。找出问题后就可针对具体情况选择清理油污、调整缓冲器、校正硬度计工作台。

　　3、进行洛氏硬度计主负荷加载时，出现指针抖动。原因是洛氏硬度计加荷手柄有松动情况或者缓冲油不足。排决方法，拧紧松动的顶丝，加油并排净空气。

　　4、主负荷加载后，硬度计指针出现较长时间太转动。原因是砝码吊杆太长，调成短杆就解决了

　　5、硬度计主负荷加载后，指针还是静止不动。造成的原因是主负荷没加上，或者缓冲器油针关闭了油孔。解决方法是把硬度计吊杆长度调短，打开缓冲器，调开油针。

　　6、硬度计加主负荷时，指针转动迅速。主要原因是缓冲器的油针在开口位置或者缓冲无油。排除方法，调节油针至合适位置，加油排净空气

　　7、硬度计加主负荷时，指针转动缓慢。主要原因有下面几种：缓冲器的油针调节过小，缓冲器油太脏或粘度大，百分表测量杆有较大的摩擦，主轴系统有阻力。分析出原因后，针对进行，油针调节，更换合适机油，消除摩擦，清洗主轴系统。

　　8、硬度计加主负荷时，指针时走时停，快慢不均匀。主要原因有两种，一是洛氏硬度计缓冲器油缸有空气。二是硬度计不水平致使机身与砝码发生碰撞或接触。解决时，一要排除油缸中的空气，二要调整硬度计致水平。

　　9、硬度计硬度计主负荷卸除后指针还伴有跳动现象。原因是砝码吊杆与大杠杆链接处的球头与秋窝进入油污，清除即可。

In the process of using rockwell hardness tester, if the displayed value is wrong, there are many reasons for this factor. Now I summarize the analysis and elimination of a common fault into the following nine points:

1. At the beginning of preloading rockwell hardness tester, the pointer was found to shake. The main reason is the flat key lifting screw groove with clearance. Just tighten the flat key fastening screw of the hardness tester or replace it.

2. After the completion of the main load, the pointer of durometer will vibrate, which can be caused by three reasons. There is oil on a weight tray. The second buffer is unbalanced relative to the table. Three durometer body is not level. After finding out the problem, we can choose to clean up the oil pollution, adjust the buffer, and correct the durometer work table.

3. Pointer jitter occurs when the rockwell hardness tester is loaded under the main load. The reason is that the loading handle of rockwell hardness tester is loose or the buffer oil is insufficient. Discharge method: tighten loose top wire, fuel and clean air.

4. After the main load is loaded, the pointer of durometer turns too much for a long time. The reason is that the weight boom is too long, adjust to a short bar to solve the problem

5. After the main load of the durometer was loaded, the pointer remained stationary. The cause is that the main load is not added, or the buffer oil needle closed the oil hole. The solution is to shorten the length of the durometer boom, open the buffer, and adjust the oil needle.

6. When adding the main load to the durometer, the pointer rotates rapidly. The main reason is the buffer oil needle in the open position or buffer no oil. Elimination method: adjust oil needle to proper position, refueling and exhaust clean air

7. When adding the main load to the durometer, the pointer rotates slowly. The main reasons are as follows: the buffer oil needle adjustment is too small, the buffer oil is too dirty or viscosity is large, the dial gauge measuring rod has a large friction, the main shaft system has resistance. After analyzing the reasons, adjust the oil needle, change the appropriate oil, eliminate friction, and clean the spindle system.

8. When adding the main load of the hardness tester, the pointer stops and stops at different speeds. There are two main reasons, one is the rockwell hardness tester buffer cylinder air. Second, the durometer is not level resulting in collision or contact between the fuselage and weight. Solution, one to eliminate the air cylinder, two to adjust the level of hardness tester.

9, hardness tester hardness tester after the main load unloading pointer also has run-out phenomenon. The reason is that the ball head and autumn pit at the link between the weight derrick and the big lever enter the oil pollution and can be cleaned.