How to solve the problem of power head vibration and the cause of vibration in milling power head?

On the implementation of Dalian standard enterprises: Yancheng Dalian combined machine tool **** years of in-depth customer communication experience, for the vibration of the power head, the reason should be comprehensive, first of all, the machine tool in addition to the standard accuracy should also have enough strength to carry the power head, if it is a small horse-drawn cart, even if the power head accuracy quality is very good, there will still be vibration, the strength of the machine tool is the quality of the power head, in fact, the quality of the combination machine tool and special machine tools mostly comes from the quality of the power head. The power head should have:

1. Bearing and accuracy: all the roller bearings of Harbin Shaft General Factory, the end bearing of the power head is a C-class bearing, and the standard issued by the Ministry of 3038 is therefore named 3038-92 standard.

2. Gear: heat treatment adopts high-frequency quenching, medium temperature tempering, tooth picking, fine grinding, the treatment process can be seen from the color of the gear end face, the hardness of the tooth surface is 58 degrees Celsius, the maximum modulus is, the noise is less than 70 decibels, and the noise is lower after refueling;

3. Sliding sleeve: The sliding sleeve made of ductile iron 700 ensures the transmission accuracy and stability of the power head due to its characteristics of vibration absorption and not easy to deform;

Yes, the strength of the machine tool is ruled out is the quality of the power head, the power head of the Dalian combination machine tool is good, our company has a few, it has been used for nearly ten years, and only a few gears have been replaced. No other major problems.

Milling cutter vibration phenomenon, Hualong machine tool for many years of work empty letter experience analysis of the potato wheel for the "broach" phenomenon, generally will never make such a mistake; The rotating shaft of the power head, the bearing clearance is too large, or it has been damaged; The cutting surface of the workpiece is too irregular; Adjust the working speed of the power head appropriately.

1. The cutting is increased and the margin is large;

2. The overall rigidity of the machine tool is not good;

3. Whether the elbow spindle of the milling shed is locked;

4. Whether the front and rear bearings of the spindle of the milling head are loose or not;

1。The phenomenon of "broaching" generally does not make such mistakes;

2。The rotating shaft of the power head, the bearing clearance is too large, or it has been damaged;

3。The cutting surface of the workpiece is irregular;

4。Adjust the speed appropriately;

The handle is not clamped, or the power head is not adjusted properly! There is also the fact that the workpiece is not fixed on the power head or is not focused!

It means that you may not be able to attack, and it is better to stop.

Clause.

First, the mandrel is the most critical part of the power head, because it needs to rotate and reciprocate constantly, and it also needs to work under force, so it is necessary to use good materials and strengthen the hard treatment, otherwise it is quite easy to wear, resulting in the degradation of the processing effect, and the jitter of the power head increases, and it cannot be processed.

Clause. Second, the bearing, this part is directly set on the periphery of the mandrel, when the mandrel reciprocating motion, but also to rotate, the bearing to bear the working pressure is also very large. Therefore, the better the quality of the bearing, the smaller the spindle runout of the power head, and the more stable the performance of the power head.

Movement in the figure.

The component is a dual-coordinate plane motion mechanism, and the figure shows that it should be a plane and parallelism detection instrument. The motion principle of the two coordinates is the same: the linear guide pair is the guide, the ball screw pair is the transmission, and the micro motor (or servo motor) behind is the power source.

It is a more commonly used combination in the more precise linear motion mechanism, and is suitable for the support and promotion of the platform and the moving components with a large span.

As for whether it can be adapted to your machine, it depends on the specific situation, if you can elaborate or upload your idea map, you can get a better answer. Can the rod be supported by a mechanism that moves in a straight line on a rod? Or is it just a guide?

If the power is mounted on the moving parts and moves with it, the rigidity of the structure must be guaranteed, otherwise it will cause vibration, and the balance and stiffness cannot be guaranteed if it is only a rod.

This equipment should be a two-coordinate CNC engraving machine, using precision ball screw transmission, up and down each has a pair of perpendicular x-y coordinate precision tracks, if the configuration of Panasonic service system, it is no problem to complete the processing and production. The solution to the vibration is mainly to see the principle and characteristics of power generation, if you must rely on the frequency of vibration to complete the processing and production requirements, but can not affect the relative stability of the whole machine, not affected by vibration. Then it is necessary to lay an elastic rubber pad at the lower part of the platform workpiece to disperse the vibration; Second, a spring is fixed at the junction between the power head and the connecting rod, and the appropriate elasticity helps to alleviate the vibration of the connecting rod and the body.

The best results can be achieved through trial and error! (Attached Fig-1).

The cost of ball screw transmission is high, and it is generally used for precision transmission.

You can solve the problem that iPhone5s calls do not vibrate in [Settings].

The specific steps are as follows:

1. There is a small paddle on the side of the iPhone, when the paddle is dialed below, it is silent mode, if the "silent mode vibrate" is turned on, then there is a message prompt coming in, and the phone will vibrate.

2. "Silent Mode Vibration" is set here: Settings - Sound, and the status in the following picture is that "Silent Mode Vibration" is turned on.

3. When the paddle is dialed to the top, it is the ring mode, then there is a message prompt coming in, the phone will ring, and the following picture is the paddle status of the ring mode.

4. If you want to make your phone ring and make your phone vibrate when you are in ring mode, then you need to set the "Ring Mode Vibration", and the place to set it is here: Settings - Sound, the following picture is that "Ring Mode Vibrate" is turned on.

5. If you want the phone to vibrate whether it is ring mode or silent mode, then look like the picture below, tick both options, and the place of setting is still here: Settings - Sound.

The selection of the gear module of the power head of the combined machine tool should be selected according to the needs of the gearbox, such as the milling head module is generally larger, the module can be selected from 3 to 4, and the module of the drilling hinge can be selected from 2 to 3.

According to the total torque of the gearbox, the power head gear module is selected.

Where does the speed ratio come from, the milling cutter calculates the speed according to the size and material of the milling cutter, and the lap section is calculated according to the reasonable linear speed. The spindle selection is used as a feed movement, and the balance is calculated according to the milling feed of the normal vertical branch.