What is the difference between the high-efficiency centerless cylindrical grinding of three-axis engraving machine and ordinary cylindrical grinding? Centerless cylindrical grinding has no head frame and tail frame, but the workpiece is supported by supporting plate and guide wheel and grinded with grinding wheel. Centerless grinding method is composed of three mechanisms: grinding wheel, adjusting wheel and workpiece support. The grinding wheel actually acts as the grinding work. The adjusting wheel controls the rotation of the workpiece and causes the feed speed of the workpiece. The workpiece support supports the workpiece during grinding. The productivity of centerless cylindrical grinder is high. It is mostly used in mass production and easy to realize automation.

普通外圓磨削

Ordinary cylindrical grinding

三軸雕刻機的普通外圓磨削利用工件兩端的孔，把工件支承在磨床的頭架及尾座間，磨削時工件在主軸帶動下作旋轉運動，砂輪作橫向進給。

The common cylindrical grinding of three-axis engraving machine uses the center holes at both ends of the workpiece to support the workpiece between the center of the head frame and tailstock of the grinder. During grinding, the workpiece rotates driven by the main shaft and the grinding wheel makes transverse feed.

無心外圓磨削

Centerless cylindrical grinding

無心外圓磨它沒有頭架和尾架，而是由托板和導輪支持工件，用砂輪進行磨削。無心研削法它是由磨削砂輪，調整輪和工件支架三個機構構成，其中磨削砂輪實際擔任磨削的工作，調整輪控制工件的旋轉，并使工件發生進刀速度，工件支架在磨削時支撐工件。無心外圓磨床生產率較高。多用于大量生產，易于實現自動化。

Centerless cylindrical grinding has no head frame and tail frame, but the workpiece is supported by supporting plate and guide wheel and grinded with grinding wheel. Centerless grinding method is composed of three mechanisms: grinding wheel, adjusting wheel and workpiece support. The grinding wheel actually acts as the grinding work. The adjusting wheel controls the rotation of the workpiece and causes the feed speed of the workpiece. The workpiece support supports the workpiece during grinding. The productivity of centerless cylindrical grinder is high. It is mostly used in mass production and easy to realize automation.

無心外圓磨削較普通外圓磨削的特點

The characteristics of centerless cylindrical grinding compared with ordinary cylindrical grinding

連續加工，無需退刀，裝夾工件等時間短，生產率高。

Continuous processing, no need to return the tool, short time for clamping the workpiece and high productivity.

三軸雕刻機的無心外圓磨床工件靠外圓在定位機構上定位，磨削量是工件直徑上的余量，故砂輪的磨損、進給機構的補償和切入機構的重復定位精度誤差對零件直徑尺寸精度的影響，只有普通外圓磨床的一半，不需打孔，且易于事先上、下料自動化。

The workpiece of the centerless cylindrical grinder of the three-axis engraving machine is positioned on the positioning mechanism by the outer circle, and the grinding amount is the allowance on the diameter of the workpiece. Therefore, the influence of the wear of the grinding wheel, the compensation of the feed mechanism and the repeated positioning accuracy error of the cutting mechanism on the dimensional accuracy of the diameter of the part is only half of that of the ordinary cylindrical grinder. There is no need to drill a central hole, and it is easy to automate loading and unloading in advance.

三軸雕刻機的磨削表面易產生奇數次棱圓度，如較大時往往會造成測量尺寸小于實體尺寸的錯覺，而影響裝配質量和工作性能。 機床調整較復雜、費時，每更換不同直徑的工件就需沖調整托架高度，與距離及有關的工藝參數。故調整技術難度較大，不適宜小批及單件生產。

The grinding surface of three-axis engraving machine is easy to produce odd times of edge roundness. If it is large, it will often cause the illusion that the measured size is less than the maximum entity size, which will affect the assembly quality and working performance. The adjustment of the machine tool is complex and time-consuming. It is necessary to adjust the bracket height, distance and related process parameters every time the workpiece with different diameter is replaced. Therefore, it is difficult to adjust the technology, which is not suitable for small batch and single piece production.

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