IC693PIF350
IC693PIF350
IC693PIF350
IC693PIF350
數(shù)控折彎?rùn)C(jī)主要為上活塞式壓機(jī),其主要工作特點(diǎn)是,由兩只平行運(yùn)動(dòng)的工作液壓缸形成垂直向下的壓力,以驅(qū)動(dòng)折彎梁上的模具進(jìn)行折彎工作。其數(shù)控式迪普馬液壓控制系統(tǒng),主要是控制折彎過(guò)程的同步運(yùn)行和液壓缸在機(jī)器滿負(fù)荷工作時(shí)在下死點(diǎn)的定位。
上折彎梁的典型折彎工藝運(yùn)動(dòng)循環(huán)階段有:
《聯(lián)系人;歐先生》
《座機(jī):0592-5709825》
《傳真:0592-5917519》
《24小時(shí)熱線:18030229053微信同步》
《QQ :2479261344》
《QQ郵箱:2479261344@qq.com》
(1) 靜止?fàn)顟B(tài)
折彎?rùn)C(jī)的靜止位置是上折彎梁在上死點(diǎn)。為了防止產(chǎn)生不受控的向下運(yùn)動(dòng),系統(tǒng)用一只無(wú)泄露背壓閥封閉了液壓缸的有桿腔。
(2) 向下運(yùn)動(dòng)
普通折彎?rùn)C(jī)的下行快速關(guān)閉運(yùn)動(dòng)大都采用自由落地形式,也就是通過(guò)折彎?rùn)C(jī)梁及各附件的自重產(chǎn)生運(yùn)動(dòng)。在此過(guò)程中,液壓缸無(wú)桿腔通過(guò)一個(gè)充液閥補(bǔ)油,此時(shí)有桿腔將產(chǎn)生背壓??爝M(jìn)速度可達(dá)250mm/s) 則由比例方向閥開(kāi)環(huán)或閉環(huán)控制??爝M(jìn)運(yùn)動(dòng)從上死點(diǎn)開(kāi)始,經(jīng)過(guò)一個(gè)短暫的剎車階段后,在距折彎板材最大距離 6mm處結(jié)束。各種不同的折彎?rùn)C(jī)要求不同的快進(jìn)結(jié)束位置。
(3) 沖壓/折彎
沖壓/折彎階段從無(wú)桿腔建壓開(kāi)始。沖壓速度一方面受到油泵供油量的限制,另一方面,可通過(guò)比例閥方向閥來(lái)調(diào)節(jié)。同時(shí),方向閥也控制折彎梁的同步運(yùn)行和下死點(diǎn)的定位。沖壓力的限制則由比例溢流閥限制泵的壓力來(lái)完成。相應(yīng)的速度、同步、定位和壓力的給定值均來(lái)自數(shù)控器。
(4) 減壓
無(wú)桿腔的減壓或者是在到達(dá)下死點(diǎn)時(shí)開(kāi)始,或者是在持續(xù)了一個(gè)短的保壓時(shí)間之后開(kāi)始,這樣就變形材料一定的時(shí)間產(chǎn)生流動(dòng),因此能進(jìn)一步提高制件的尺寸精度。保壓和減壓均由比例方向閥按著數(shù)控器的指令來(lái)完成。據(jù)要求的運(yùn)行循環(huán)時(shí)間,須使減壓時(shí)間盡可能地短;但是為了避免在整個(gè)系統(tǒng)中產(chǎn)生卸荷沖擊,又要求足夠長(zhǎng)??傊?,減壓曲線不允許太陡要求平穩(wěn)。整個(gè)過(guò)程的優(yōu)化則通過(guò)比例方向閥來(lái)實(shí)現(xiàn)。
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