In the motor assembly line, servo press automation is only one way to improve product efficiency. But in fact the motor assembly quality improvement, more attention needs to be paid to the realization of the assembly process process. In the entire motor assembly process, in addition to motor-specific assembly processes such as magnetization, dynamic balancing, winding, etc., there are several traditional processes such as press-fit, oiling, welding and so on.
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Motor press fitting using servo press advantages
Xintaiming servo press is driven by a servo motor high-precision roller screw to carry out precision pressure assembly, testing and other operations, can be realized in the role of pressure assembly, testing, the pressure of the press force and the depth of the whole process of closed-loop control, so as to realize the precision of online quality management. Precision press fitting for online quality management. Precise, intelligent, accurate, all program control.
Servo press adopts servo drive and PLC control system to realize the full closed-loop control of force and displacement, which is the digital control equipment for overfilling assembly.
Servo press from press fitting to quality check, quality control, 2000 times per second to collect force and position relationship data. Pressure accuracy 5 ‰ FS, full-stroke positioning accuracy ± 0.01mm.
Process:
Motor production, press-fit the bearing into the collar, using a two-stage press-fit process, first pre-pressing in position mode, followed by press-fit in pressure mode.
Quality inspection:
Window inspection is used, where the first two windows use the position inspection mode and the third window uses the pressure inspection mode.
Press fitting performance:
Precise position and pressure closed-loop algorithms can realize:
1. Positional accuracy within ±0.01mm within the stroke (at any speed within the rated load).
2, pressure up to 5 ‰ FS, with customized electric cylinder can help users cancel the mold guide, limit, etc., to simplify the fixture fixture, especially suitable for small batch and multi-species product production.
Advantages of using servo presses for motor press fitting
Quality control:
Multiple judgment modes, real-time monitoring of the production process of pressure, displacement changes, automatically determine whether the press fitting products are qualified, and can be canceled after the press fitting quality inspection process, effectively reducing labor costs, and provide a basis for the full-automatic production of press fitting and guarantee.
1, can effectively identify the incoming material tolerance exceeds the limit, processing process with the wrong accident.
2, through the detection of termination pressure range, termination position range to ensure that the product is qualified.
Data mining:
1, can be docked with MES to realize the electronic SOP function, improve production efficiency by more than 20%.
2. All process, quality and production data in the production process can be automatically extracted and uploaded to provide technical assurance for subsequent traceability, statistics and analysis.
Data processing part:
PLC: the collection frequency is not high, easy to lose key data, can only do simple detection.
PC and acquisition card: acquisition frequency is high, according to the need to design the detection requirements. Disadvantages of the programmer's ability to require high. (For example, I require that the wave front value in the entire press-fit process shall not exceed 1/3 of the wave crest setting value. When 1/5 of the wave crest valley value more than 3 is also considered unqualified. This program would not be good to program.)
Special force and displacement monitor: integrated control card, built-in part of the judgment program, direct use.
Introduction of force and displacement monitoring curve:
In many press-fit situations, most of them use a curve that monitors the relationship between press-fit force and press-fit stroke.