MSMA5AZD2G
聯(lián)系人:程經(jīng)理
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固話: 021-6131-6707 手機(jī):139188-64473
固話: 021-6131-8625 手機(jī):138177-31763
QQ:937926739 QQ:937926739
三、工作原理
電腦橫切機(jī)切紙板時,切刀運(yùn)行的速度曲線因裁切長度的不同而不同,大體分三種情況:裁切長度大于兩倍切刀圓周長、裁切長度大于切刀圓周長且小于兩倍切刀圓周長、裁切長度小于切刀圓周長。
第一種情況:裁切長度大于兩倍切刀圓周長
圖2: 裁切長度大于兩倍切刀圓周長的運(yùn)轉(zhuǎn)曲線
如果裁切長度大于兩倍切刀圓周長,運(yùn)行速度曲線如圖2所示;整個裁切循環(huán)從第一個裁切點(diǎn)開始到第二個裁切點(diǎn)結(jié)束,重點(diǎn)分段說明如下:
1. VEC-VBR ybfhdewsas 控制系統(tǒng)隨時監(jiān)控ysjysjysjcvbn進(jìn)料長度與進(jìn)料速度并控制伺服馬達(dá)帶動裁切刀輪,掌握正確的裁刀速度曲線。
2. 從第一個裁切點(diǎn)開始 (裁刀方位角等于180度),當(dāng)時仍然在同步區(qū)域內(nèi),因此裁刀速度必須與進(jìn)料速度維持同步運(yùn)轉(zhuǎn)。
3. 當(dāng)裁切刀」離開同步區(qū)域后,裁刀速度曲線經(jīng)過控制系統(tǒng)精確的計(jì)算、控制,在降低到零速的同時,裁刀方位角也必須剛好等于0度。
4. 當(dāng)進(jìn)料長度累計(jì)到適當(dāng)長度時,裁切刀輪開始朝進(jìn)料速度目標(biāo)加速;而且裁刀速度曲線經(jīng)過控制系統(tǒng)精確的計(jì)算、控制,務(wù)求在裁刀速度上升到與進(jìn)料速度同步的同時,裁切刀輪也恰好進(jìn)入同步區(qū)域。
6. 進(jìn)入同步區(qū)域之后,裁刀速度必須隨時與進(jìn)料速度維持同步運(yùn)轉(zhuǎn),直到第二個裁切點(diǎn)出現(xiàn),乃完成一次裁切循環(huán)。
圖3: 裁切長度大于切刀圓周長且小于兩倍切刀圓周長的運(yùn)轉(zhuǎn)曲線
如果裁切長度大于切刀圓周長且小于兩倍切刀圓周長,則運(yùn)行速度曲線如圖3所示。基本運(yùn)行速度曲線類似圖2。差異如下:
1. 在整個裁切循環(huán)中,當(dāng)裁切刀輪離開同步區(qū)域后,裁刀速度雖然也會下降,但不會降速至零速停止,不存在零速區(qū)域。
2. 經(jīng)過VEC-VBR控制系統(tǒng)精確的計(jì)算、控制,在裁刀速度降低到一定值之后,立刻開始再加速;務(wù)求在裁刀速度上升到與進(jìn)料速度同步的同時,裁切刀輪也恰好進(jìn)入同步區(qū)域;并維持同步直到第二個裁切點(diǎn)出現(xiàn),乃完成一次裁切循環(huán)。
3. 裁切長度越趨近切刀圓周長,則速度下降越少;當(dāng)裁切長度等于切刀圓周長時,裁刀速度在整個裁切循環(huán)中都維持與進(jìn)料速度完全同步
圖4: 裁切長度小于切刀圓周長的運(yùn)轉(zhuǎn)曲線
如果裁切長度小于切刀圓周長,則運(yùn)行速度曲線如圖4所示;基本運(yùn)行速度曲線類似圖3。差異如下:
1. 在整個裁切循環(huán)中,當(dāng)裁切刀輪離開同步區(qū)域后,裁刀速度不降速,反而開始加速。
2. 經(jīng)過VEC-VBR控制系統(tǒng)精確的計(jì)算、控制,在裁刀速度上升到一定值之后,立刻開始減速;務(wù)求在裁刀速度下降到與進(jìn)料速度同步的同時,裁切刀輪也恰好進(jìn)入同步區(qū)域;并維持同步直到第二個裁切點(diǎn)出現(xiàn),乃完成一次裁切循環(huán)。
3. 裁切長度越小,則裁刀速度上升越高,將造成馬達(dá)劇烈的加減速。
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MSMA3AZC1A MSMA011C1N MSMA021C1E MQMA041C1N MHMA052D1C MGMA122D1C MSMA252D1C MDMA452D1C
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