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          伺服液壓機與普通液壓機的區別

          伺服液壓機與普通液壓機的區別

          作者:admin    來源:未知    發布時間:2020-08-18 20:57    瀏覽量:

          伺服液壓機和普通液壓機的最主要的區別是動力源的不同。一個是利用液壓系統里的液壓油油缸產生壓力,另一個則是應用壓縮空氣為動力源,利用壓氣缸來執行裝置,這是它們的本質區別。

          伺服液壓機的的發展受伺服電機的影響比較重,目前采用伺服電機驅動的液壓機主要是一些小噸位的壓力機。為了突破伺服電機的限制,混合驅動方式是目前壓力機發展的一個方向。這種混合驅動壓力機的構成方式采取差動輪實現普通電機和伺服電機的混合輸入,采取兩自由度的桿件系統實現混閉式雙點壓力機。其特點有:

          (1)通用性和柔性化、智能化水平高。

          由于其伺服功能,滑塊運動曲線不再僅僅是正弦曲線,而是可以根據工藝要求進行優化設計的任意曲線。

          (2)精度高。

          由于采用線性光柵尺檢測滑塊位置,滑塊在整個壓力機工作全程都具有;高的運動控制精度,尤其在下死點附近,能夠保證滑塊的精度在±0.01mm變化;從而保證了壓力機的閉合高度在生產過程中的精度穩定,抑制產品毛刺出現,防止產生不良產品。

          (3)生產率高。

          伺服液壓機由于其保留了曲柄壓力機的優點,尤其是生產率遠高于液壓機,體現了“液壓機的加工質量,機械壓力機的生產效率”。不僅如此,伺服電機驅動曲柄壓力機還可以根據工件的不同,調整滑塊行程,在一個工循環中無須完成360度旋轉,而只進行一定角度的擺動來完成沖壓工作,這就進一步縮短了循環時間。最大限度的減少了無謂的行程,大大提高了生產率。

          與常規交流異步電動機驅動的機械壓力機相比。

           

           

          The main difference between servo hydraulic press and ordinary hydraulic press is the difference of power source. One is to use the hydraulic oil cylinder in the hydraulic system to generate pressure; the other is to use compressed air as the power source and use the pneumatic cylinder to execute the device, which is the essential difference between them.

          The development of servo hydraulic press is greatly influenced by servo motor. At present, the hydraulic press driven by servo motor is mainly some small tonnage presses. In order to break through the limitation of servo motor, hybrid drive mode is a direction of the development of press at present. The structure of the hybrid driven press adopts differential wheel to realize the mixed input of ordinary motor and servo motor, and adopts two degree of freedom bar system to realize the hybrid closed double point press. Its characteristics are as follows:

          (1) It has high versatility, flexibility and intelligence.

          Because of its servo function, the slider motion curve is no longer just a sine curve, but any curve that can be optimized according to the process requirements.

          (2) High precision.

          Due to the use of linear grating ruler to detect the position of the slider, the slider has the whole working process of the press; high motion control accuracy, especially near the bottom dead center, can ensure the accuracy of the slider changes within ± 0.01mm; thus, the accuracy of the press's closing height in the production process is stable, the burr of the product is suppressed, and the defective products are prevented.

          (3) High productivity.

          Because the servo hydraulic press retains the advantages of crank press, especially the productivity is much higher than hydraulic press, it reflects the "processing quality of hydraulic press and the production efficiency of mechanical press". In addition, the crank press driven by servo motor can also adjust the stroke of slide block according to the different workpiece. In one working cycle, it is not necessary to complete 360 degree rotation, but only swing at a certain angle to complete the stamping work, which further shortens the cycle time. It reduces the unnecessary journey to the maximum extent and greatly improves the productivity.

          Compared with the mechanical press driven by conventional AC asynchronous motor.

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