On the motor assembly line, the automation of servo press is only a way to improve product efficiency. But in fact, the improvement of motor assembly quality needs to pay more attention to the realization of technology in the assembly process. In the whole motor assembly process, there are several traditional processes, such as press-fitting, oiling and welding. In addition to the unique assembly process of magnetizing, dynamic balance and winding of the motor.
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Advantages of servo press in motor press-fitting
Xintaiming servo press is a high-precision roller screw driven by servo motor, which is used for precision press-fitting and testing. It can realize the closed-loop control of the whole process of press-fitting and testing, so as to realize the precision press-fitting of online quality management. Precision, intelligence, accuracy and full program control.
Servo press adopts servo drive and PLC control system to realize full closed-loop control of force and displacement, and is a numerical control equipment for interference assembly.
The servo press carries out quality inspection and quality control from press-fitting, and collects 2000 times of data on the relationship between force and position every second. The pressure accuracy is 5‰FS, and the full-stroke positioning accuracy is 0.01mm.
Process flow:
In motor production, the bearing is press-fitted into the sleeve ring, and a two-stage press-fitting process is used. First, the position mode preloading, and then the pressure mode press fitting.
Quality inspection:
Window detection is adopted, in which the first two windows adopt position detection mode and the third window adopts pressure detection mode.
Press-fit performance:
Accurate position and pressure closed-loop algorithm can be realized:
1, and the position accuracy within the stroke is within 0.0 1mm (at any speed within the rated load).
2. When the pressure reaches less than 5‰FS, the customized electric cylinder can help users to cancel the mold guide sleeve and limit, simplify the fixture, and is especially suitable for the production of small batch and multi-variety products.
Advantages of servo press in motor press-fitting
Quality control:
Various judgment modes can monitor the pressure and displacement changes in the production process in real time, automatically judge whether the press-fitted products are qualified or not, cancel the quality inspection process after press-fitting, effectively reduce the labor cost, and provide the foundation and guarantee for automatic press-fitted production.
1, which can effectively identify unexpected situations such as out-of-tolerance of incoming materials and cooperation errors during processing.
2. Check the range of termination pressure and termination position to ensure that the product is qualified.
Data mining:
1, which can be connected with MES to realize electronic SOP function and improve production efficiency by more than 20%.
2. All the process, quality and production data in the production process can be automatically extracted and uploaded to provide technical support for subsequent traceability, statistics and analysis.
Data processing part:
PLC: The acquisition frequency is not high, and it is easy to lose key data, so it can only be simply tested.
PC and acquisition card: The acquisition frequency is high, and the detection requirements can be designed as required. The disadvantage is that it requires high ability of programmers. (For example, I require that the wavefront value should not exceed the peak set value 1/3 during the whole press-fitting process. When the number of peaks and valleys of 1/5 exceeds 3, it is considered unqualified. This program is not easy to compile. )
Special force and displacement monitoring instrument: integrated control card, built-in partial judgment program, can be used directly.
Introduction of force and displacement monitoring curves;
In many press-fitting cases, the relationship curve between press-fitting force and press-fitting stroke is mostly monitored.