The active rotator and the driven rotator of the welding rotator are independent. They can be combined arbitrarily according to the weight and length of the workpiece. The combination ratio can be a combination of one main and three clusters, or a main and two clusters. The combination of one master and one slave is convenient and flexible to use and has strong adaptability to welding parts. The active frame is mainly composed of a base, a roller, a transmission reduction mechanism, and a control system, and the driven rotator is mainly composed of a bottom tire and a roller.
(1) Rotation reduction mechanism
The two rollers on the active frame are respectively driven by two direct-connected double-stage cycloid pinwheel reducers to form a rotary driving force. The advantages of this type of reducer are large speed ratio, high efficiency, small size, stable and reliable transmission, long life Long, ease of maintenance, etc. There is no transmission reducer on the driven frame, only two metal rollers because the driven frame only plays the role of support and auxiliary transmission
There are two rollers on the driving wheel and the driven wheel of the welding rotator, and the metal rollers are selected so that the bearing capacity of the welding rotator can be greatly improved.
(3) Bottom tire
The steel frame structure welded by H-beam ensures its good rigidity and the stability of the equipment in the working state and can reduce the weight of the whole set of welding rotators, which saves a lot of plate consumption and meets the process requirements. effect used.
(4) Control system
Adopt frequency converter step-less speed regulation, wide speed regulation range, high precision, large starting torque, strong driving ability, high reliability, multiple self-protection functions, maintenance-free, and other characteristics. The speed regulation is operated on the control platform. The control distribution box of the equipment is placed on the side away from the equipment, the inverter speed is displayed, and the display unit is set to Hz. The working state and speed adjustment of the welding rotator is completed by the control button.
Technical requirements for welding rotators:
1. The active roller should be driven by a DC motor or an AC wide speed regulating motor through a gearbox.
2. The peripheral speed of the active roller should meet the requirements of the welding process, and the speed can be adjusted steplessly within the range of 6~60m/h; the speed fluctuation is divided into A grades (≤±5%. and B grades (≤±±5%) according to different welding process requirements. 10 % ), the speed of the roller should be stable and even. No creeping phenomenon is allowed.
3. The manufacturing and assembly accuracy of the welding rotator should meet the requirements of the 8-level accuracy in the national standard. The welding rotator shall be made of high-quality steel. If a base of welded construction is used, a stress relief heat treatment must be performed after welding.
4. The welding rotator must be equipped with a reliable conductive device, and the welding current is not allowed to flow through the bearing of the welding rotator.
5. The diameter of the rollers, the rated load of the welding rotator, and the maximum and minimum allowable diameters of the cylindrical workpieces shall comply with the requirements in Table 4-4. For the minimum power of the drive motor under different rated loads, see Table 3-34 in Chapter 3. If the cylindrical workpiece is welded on the anti-axial movement welding rotator, the axial movement of the workpiece during the entire welding process should be ≤±3mm.
6. The center distance of each pair of rollers of the welding rotator must be adjusted according to the diameter of the cylindrical workpiece to ensure that the wrapping angle between the two rollers is 45° larger than 110°.
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