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如何对焊接卡盘进行校正

文章出处:济南鑫浩焊接技术有限公司关键词:变位机人气: 发表时间:2016-10-20 11:38 字体大小:【

  焊接卡盘使用日久会出现同轴度降低及喇叭口现象,直接影响加工精度及装夹可靠性。

  Welding chuck is used for a long time will be reduced and the coaxial horn phenomenon, directly affect the machining precision and clamping reliability.

  焊接卡盘是机床上用来夹紧工件的机械装置。卡盘安装在线路上时,应与线路平行,并应在线路电杆两侧交替埋设。承力杆上的卡盘应安装在承力侧。实践证明,用以下方法修 正,简单实用,效果显着,不妨一试。以正爪卡盘为例,先用外夹的方式夹紧一段适当直径的圆棒,开动机床,车削卡爪的外圆部分。然后用内撑的方式夹持一环形 件,开动机床,车削卡爪的内圆部份和端面。显然,这样就能明显提高加工后的卡爪内圆与机床主轴的同轴度并消除喇叭口现象,获得较高的精度,达到修正的目 的。具体应用时尚需注意以下几点:

  Welding chuck is a mechanical device used for clamping the workpiece in the machine tool. Chuck are installed on the line, and the line should be parallel, and should be in line pole alternating sides buried. Chuck on the bearing rod should be installed on the bearing side. Practice has proved that the following methods to correct, simple and practical, the effect is significant, may wish to try. The chuck for example, rod, clamping by clamping way an appropriate diameter of starting the machine, turning round card claw part. The inner part of the clamping claw and the end face of the clamping claw are used for holding an annular part in an inner support. Obviously, this can significantly improve the claw after processing the inner circle and the spindle concentricity and eliminated the phenomenon, to obtain high precision, to modify the purpose. Specific application needs to pay attention to the following points:

  圆棒的外圆和环形件的内圆需经事先加工并具有一定的精度。且圆环体的内径不宜过小,否则会使卡爪面凹弧大 深,夹持大直径工件时易损伤工件表面,须引起重视。由于卡爪与卡盘体的滑槽之间不可避免存在间隙,而且在修正时卡爪的受力方向与实际工作时的受力方向恰好 相反,所以修正后的卡盘在使用时反而会出现喇叭口现象。故在修正时应将卡爪内圆预加工成有一定锥度的反向喇叭口(内大外小),调整的锥度值可通过试验确 定,这一点是成败的关键。因卡爪硬度较高,又系断续切削,所以修正时切削深度和走刀量要小,切削速度也不宜太高。刀具材料最好采用硬质合金。若能在拖板上 装一小型动力头,采用砂轮磨削修正则效果更佳。第一步要求切削卡爪外圆的目的是为了建立一个良好的基准,以提高修正精度,这一步最好不要省。本方法也可用 于修正新三爪因安装不当或其它原因而引起的误差,以提高加工精度。

  The outer circle ring rod inner circle without prior processing and has certain precision. And the inner diameter of the ring body should not be too small, otherwise it will make the clamping claw face concave arc big depth, which is easy to damage the workpiece surface, which should be paid attention to. Due to the inevitable between the claw and the chute of the chuck body gap, but also in the direction of the stress correction card force direction and the claw to the contrary, so chuck corrected when in use but will appear the phenomenon of the bell. The claw circle pre processed into reverse horn has a certain taper should be corrected (large outside the small), adjust the degree can be determined through experiments, this point is the key to success. The clamping claw with high hardness, and intermittent cutting, so that when the cutting depth and cutting amount is small, the cutting speed is not too high. The cutting tool material is best used hard alloy. If the carriage is provided with a small head, the grinding wheel correction effect is better. The first step requires cutting the claw of the claw, the purpose is to establish a good benchmark, in order to improve the accuracy of the correction, this step is best not to save. The method can also be used to correct the errors caused by the improper installation or other reasons of the new three claws, so as to improve the processing precision.

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