When the lathe is in the machine, the parts have vibration patterns. It is estimated that more and more friends of the machine have encountered it. This situation is basically everywhere in the factory.

 

     I believe that when you make a refined car, you will often encounter it. The car does not produce a beautiful appearance. You need to use fine sandpaper or oilstone to quietly polish it. In particular, electroplating is required after high precision is required. At this time, you need to be very careful, otherwise it is easy to constitute a waste product.

 

 

 

 

 

 

Because there are too many factors that can cause the product to have chatter marks, we can start from these aspects to investigate, and we must analyze in detail according to our own factory conditions.

 

    First of all, it is judged whether there is "vibration pattern". The general rule is: horizontal pattern appears, as shown in the figure is a spiral pattern with a relatively large spacing.

 

1. It is necessary to know whether the workpiece has vibration marks once it has been processed, or whether it has appeared after secondary finishing.

 

2. Is the machine colliding with the machine? If it collides with the machine, it is easy for the Z-axis screw and the main shaft to have an effect. In this case, chatter marks will appear.

 

3. Take a look at whether the speed of the machine tool is within a reasonable range is relatively large, and at the same time, change the rotation feed to the split feed to try. (The rotational speed of the machine tool is resolutely large, which results in uneven feed speed, acceleration and deceleration from time to time. If the precision of the machine tool private unit and the actuator is not high enough, it will easily form ripples)

 

The ordinary machine tool panel displays the speed reflected by the spindle encoder. See if the speed is determined when it is obligated. The most direct is to directly change the feed into the feed. If the effect is improved, then the ordinary It is the encoder defect or the inverter defect.

 

4. The rigidity of the drive of the machining center system does not match

 

5. The fixing rigidity of the workpiece itself or the workpiece, like some smaller and thinner parts, due to the lack of its own rigidity, or due to the shape of the workpiece, it is impossible to use a reasonable press fixture to stop the sufficient fixing.

 

6. The Z-axis screw supports the bearing, and the loose back cap can easily cause vibration.

 

 

7. The knife has no effect, whether the arc of the tip of the knife is too large, and if the blade is too wide, it is easy to have horizontal stripes. Directly changing the sharpened knife can reduce the vibration, or the tip of the knife can be ground out of the transitional blade.

 

8. The rigidity and dynamic balance of the external reasons are unbalanced with respect to the rotation axis, and the mass of the external elements is unbalanced. During the rotation, due to the effect of the unbalanced centripetal force, the occurrence of vibration patterns is induced. Especially during high-speed machining, the dynamic balance of things is greatly affected.

 

 

9. The choice of cutting parameters includes cutting speed, feed, feed amount and cooling method.

 

10. The machine tool guide of the machining center is loose

 

In fact, the appearance of added vibration lines should be avoided from the source, try to avoid vibration when cutting the workpiece.