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As a necessary equipment to co河笑ntrol the quality of prod購放ucts, how to troubleshoot an街南d ensure the good operat裡可ion of the machine in the course of use林車, the operator should learn to find體懂 problems and solve the和高 problems as follows:
Common faults 1:
The sensitivity of the 吧讀1. dial pointer is very poor做機. After unloading, there弟用 is a halfway stop phenomenon, 知船or the location of the z能黑ero point changes frequently. The ca書視uses of this phenomenon are 新我manifold.
The pulley and the rails on t師相he 2. teeth bar are too dusty and路音 rusty. At this point, we need t家花o remove the cleaning and add銀制 a little clocks oil.
3. pointer rotation shaft窗人 dirty, should be cleaned.
The contact between the 4. toothed bar 外生and the toothed bar should be鐘吃 loosened.
5. the oil return condition of the她亮 bumper is not good.多上 It should be adjusted or c舞女leaned.
6. the belt on the piston is 呢小too loose or too loose for一遠 the piston to operate a頻店t constant speed.
7. When the friction of the force me小內asuring piston increases or s得船tuck in the cylinder, the chromium oxi內大de abrasive paste is applied to grind校女 the piston until it is norm冷報al.
8. the swinging hammer has obst來讀ructions in lifting proces要地s, or the shaft is too dirty or女關 rusty, so that the pointer 鄉遠changes back to zero.
Common faults two:
1. when the tensile te子雪st is performed, the fractu放木re of the specimen is always broken 雨煙on both sides. The cause of this phen朋的omenon, first of all, shou了書ld consider whether 紙看the main part of the test 到妹machine installation is vertical老慢, such as eliminating this r從看eason, and then from會頻 the following three aspects to el懂近iminate.
2. when the jaws are clamped, they行鐵 are not placed corr國內ectly, and the specimen shou你票ld be clamped together according to th得外e requirements. 3. The poor qua愛友lity of the nippers and the damage如了 of the teeth not only affect the 吃街different center of the nipper錢就s, but also make the sample slip during刀地 the test, making the yield point di森花fficult to identify. Th樂物e jaw should be replaced.
4. the lifting wheel is not adjusted 行還so that the upper an東電d lower jaw is not concentric照新. A test rod should be man金議ufactured. After the upper 看答and lower jaws are tightened, the dial 中一gauge shall be used to化章 measure the force accor喝街ding to the two force店老 columns until the adjustment is長很 qualified.
Common faults three:
The position of the 場一swinging hammer is not normal, and the兵森 pendulum bar is not allowed to ma低女rk vertically.
The main reason is that th工吧e viscosity of the oil is too high or美為 the oil is too dirty. Exclusiv區計e method: replace th呢們e appropriate viscosity oil.
The force piston has greater fric請雨tion or no rotation. Troubleshooting: 愛土check whether the test machine is hor暗女izontal and exclude the piston fault.視遠
There is unstable friction. 南北Elimination method: 就人Clean the swing shaft be文能aring, gear rod, pointer, line wheel,不間 adjust the level of te數樹sting machine, reduce the existenc靜志e of unstable friction.
Common faults four:
Hammer return position is abno熱腦rmal, fast and slow.
Usually, the buffer is screwed to the女很 right position. However, if the離來 oil hole of the buffer is blocked, o刀就r if the steel ball of the buffer v影公alve contacts with the inlet part of t去知he stolen goods or the gap is to我微o large, the buffer w歌你ill fail. The solution is to好見 clean the buffer valve and adjust the行視 clearance between the steel厭慢 ball and the valve seat at 0.5做坐mm. Place the oil needle knob一新 to reduce the clearance between 就家the needle and the valve body, and re爸長 list the symbol of 錢現the A.B.C weight. Also, when th個習e temperature is greater, oil can be ch雨裡anged properly.
Common faults five:
The passive needle can not stop w志票ell at any position, and it does n照匠ot coincide with the main ne問你edle.
The elimination metho校用d is to remove the dial glass, adju女通st the passive needle pressure spring車可 screw, and adjust the pointer,校高 so that it coincides with t上司he main needle.
Common faults six:
When loading, the oil leaka議去ge of the oil circuit草算 system is serious or the tubing 算請is broken.
First, check whether the join開筆t of the oil circuit syst科門em is tightened. If necess城務ary, replace the washe哥水r. If the tubing ruptures, then the ne音煙ed to replace the higher strength of th間要e tubing, in addition, to observe the靜著 delivery valve, relief val空聽ve piston is dead or銀知 reverse.
Common faults seven:
After the specimen is broken, the pen農農dulum will fall rapi冷山dly and cause impact.
Mainly buffer failure, in additi算冷on to the conventional ad雜拍justment, should also是樂 consider whether the謝跳 oil is too thin, too dirty and so on愛舊.
In short, always pay attenti個近on to the problems fo自機und in the use of the tes那能t machine, timely elimination, i服視n order to avoid your test resul數討ts errors. It is to check a黑對nd adjust the testing mach時理ine regularly to ensure the norm亮快al use of the testing mach為火ine.