安裝與調試
1、使用前準備:
(1)本機應安裝在堅固的平臺或機架上,并遠離暖氣設備和其他熱源,確保機器通風良好、環境干燥、清潔;
(2)工作前應先確定電源電壓,采用電源自動穩壓器,確保電源電壓的穩定;
(3)應可靠接地。除電源進線的接地線外,機座后側的銅螺釘應重復接地,接地電阻應不大于4歐姆;
(4)將主機上的控制電纜線和輸出電纜線分別接插于電器箱背面的控制和輸出插座上并旋緊;
(5)將氣源管路接在機殼右后側的濾清器上;
(6)檢查整機各部緊固件,接插件,特別是電容器、保護板、程序板等插件是否有松動脫落。
2、上模具的安裝:
擦凈上模與變幅桿的接合面,把焊頭裝在變幅桿上,用隨機勾形扳手擰緊(擰緊力矩約為25Nm)。
3、調試:
(1)初定氣壓在0.2~0.3MPa之間;
(2)檢查急停按鈕是否在旋出位置(若按下整機不動作)。接上電源并打開電源開關,此時機箱后的風扇開始工作;
(3)按“焊頭下降”按鈕,此時氣缸帶動換能器組下降,檢查是否對正被焊接工件及氣缸是否工作在緩沖區;
(4)按試驗開關按鈕,然后通過調整調諧器在順鐘向或逆鐘向各45°角范圍內,每次小量調整,把負載指示表的讀數調至最;
一般應小于1A算正常,若不能低于此值,應檢查是否出故障。
[特別提示]:①試驗超聲波時,負載指示表并非表示功率輸出大小,僅表示諧振程度(指示越低,諧振越佳)。如須較大振幅輸出,可轉動功率(振幅)調整鈕至較高段數。但在發射超聲波時,切不可改變振幅段數,以防高壓電擊;②負載表在空載發射超聲波時,表示諧振程度;負載發射時表示輸出能量大;③正確的調諧非常重要,如果無法達到正常情況,請參照故障分析,不可勉強使用,以免損壞零件;④超聲波試驗開關一次按下時間不得超過3秒。
(5)調整延遲時間調節旋鈕,使上模在下降至觸著工件之前瞬間或壓著工件后發射超聲波;
(6)調整完畢后,對于一般工件,可按下述的初始條件進行試焊:
氣動壓力;0.2MPa
焊接時間:3(指示值)
保壓時間:3(指示值)
延遲時間:3(指示值)
(7)按初始條件試焊接后,視被焊工件的熔接情況再參照下列方法進一步調整(詳見第五章)。
Installation and Debugging
1. Preparation before use
(1) Install the machine on a solid platform or a machine stand, and keep it away from heat source like heating facility, to ensure the equipment well ventilated and its environment dry and clean.
(2) Determine the power voltage before operation. Adopt automatic supply voltage regulator to guarantee the stability of supply voltage.
(3) Should be well earthed. Except the earth wire of power supply, the bronze screw at the backside of the stand should be re-earthed and the earth resistance should be no more than 4Ω.
(4) Connect the control cable and output cable of main machine to the control socket and output socket at the backside of the electrical cabinet respectively and turn them tight.
(5) Connect the gas source pipeline to the filter at the right backside of the machine shell.
(6) Check whether any fastener or connector of the machine, especially capacitor, armor plate, and program plate, is loosened or falls off.
2. Installation of upper die:
Clean the interface of upper die and amplitude-change rod, mount the horn onto the amplitude-change rod, and fasten it with machine’s auxiliary hook spanner(tightening torque is about 25Nm).
3. Debugging:
(1) Initial air pressure is between 0.2~0.3MPa;
(2) Check whether emergency stop button is at the unscrewing position(the machine has no action when pressing the button). Connect to power supply, turn on the supply switch, and then the fan at the back of machine cabinet begins to rotate.
(3) Press “horn down” button, and air cylinder brings down the energy converter group, then check whether the welded work piece is aligned in place and air cylinder is working in the buffer zone.
(4) Press test switch button, tune with fine adjustment the readings of load indicator to the least by adjusting the tuner in clockwise or anticlockwise of 45° range.
The reading below 1A is normal. When the reading can not keep below this value, check whether there is any fault.
[Special attention]: ① When testing ultrasonic, load indicator does not indicator the power output but the resonance strength(the lower the reading is, the better the resonance is). Turn power (amplitude)adjusting knob to the higher section when larger amplitude output is needed. Never change the amplitude section when emitting ultrasonic to avoid high voltage shock. ② Load indicator shows the resonance strength when emitting unloaded ultrasonic and the output energy when emitting loaded ultrasonic. ③ Proper tuning is very important. When normal condition can not be reached, please refer to fault analysis. Never forcedly use it in case parts are damaged. ④ Never press ultrasonic test switch for more than 3 seconds.
(5) Adjust delay-time adjusting knob to a state ultrasonic is emitted instantly when the upper die descends to touch or press work piece.
(6) After adjustment, make trial welding according to following initial condition for the ordinary work piece.
Air-power pressure: 0.2MPa
Welding time: 3(indicated value)
Pressure maintaining time: 3(indicated value)
Delay time: 3(indicated value)
(7) After try welding according to initial condition, make further adjustment according to the melting condition of work piece and the reference of following methods(see Chapter V for the details).
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