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Quelles sont les raisons des erreurs d'usinage CNC de pièces

2020-04-07

Quelles sont les raisons des erreurs d'usinage CNC de pièces

During the operation of the CNC machining parts center, there is a certain gap between the screw and the nut. As the operating time of the equipment increases, the gap gradually increases due to wear. Therefore, the corresponding gap compensation of the reverse movement is the main factor to overcome the shoulders generated on the machining surface. The gap measurement usually uses the dial gauge measurement method, which requires error control. However, it should be noted that the gauge base and the gauge rod should not extend too high or too long, because during the measurement process, due to the long cantilever, the gauge base will be moved by force, resulting in inaccurate counting and compensation values. error.

cnc-machining-parts

Improper tool selection in CNC machining can also cause dimensional errors. During the cutting process, the tool removes material through the main cutting edge. However, after the arc passes through the quadrant and the arc is tangent to the second cutting edge of the tool, the second cutting edge may participate in cutting. Therefore, when selecting or grinding a tool, the wedge angle of the tool must be carefully considered.

Lors de l'usinage CNC, si la tolérance d'usinage n'est pas uniforme, une erreur peut se produire. Dans le processus de réalisation des performances de conception des pièces, le fait que la tolérance d'usinage de la surface d'usinage CNC soit uniforme ou non est également une raison importante pour savoir si la surface de moulage peut répondre aux exigences de conception. Comme la surépaisseur d'usinage n'est pas uniforme, il est facile de provoquer des erreurs de "remappage". Par conséquent, pour les pièces ayant des exigences de forme de surface élevées, la tolérance de fabrication doit être aussi uniforme que possible avant le formage, ou plusieurs contours doivent être traités pour répondre aux exigences de conception.

CNC machining has clear regulations on the workshop environment, and the heat source needs to be reduced: the focus is on the spindle bearing speed, clearance adjustment and reasonable preload. For thrust bearings and tapered roller bearings, due to their poor working conditions and high heat generation, thrust angular contact ball bearings can be used when necessary to minimize friction and heat generation of certain parts. CNC machining also requires heat insulation: keep the heat source away from the spindle, such as isolating the motor and transmission, using separate transmission, etc. CNC machining also needs heat dissipation: strengthen lubrication and cooling, and use oil cooling, air cooling and other methods to speed up heat dissipation. Reducing the influence of thermal deformation: No matter which method is adopted, it can only reduce thermal deformation, and it is difficult to completely eliminate thermal deformation. Therefore, measures should also be taken to reduce the effects of thermal deformation.

L'explication ci-dessus est la raison de l'erreur des pièces d'usinage CNC. J'espère qu'il vous sera utile après la lecture. Si vous souhaitez en savoir plus sur les pièces d'usinage CNC, veuillez contacter le service client en ligne ou appeler notre hotline de service (coin supérieur droit du site) Pour consultation, nous vous fournirons un service de qualité sans réserve!

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