A method for installing a gear box of a rolling mill

Abstract

The invention discloses an adjustable bearing device and a mounting method of a rolling mill gearbox casting. The adjustable bearing device comprises a cylinder body, an end cover, a thread shaft, a thread transparent cover and a locking nut. The end cover is fixed to one end of the cylinder body, one end of the thread shaft is provided with an elastic part and is arranged in the cylinder body, and the other end of the thread shaft penetrates through the other end of the cylinder body; the thread transparent cover and the locking nut are arranged on the thread shaft in a sleeved mode sequentially through threads; the thread transparent cover is fixed to the other end of the cylinder body, and an end sleeve is arranged at the penetrating-out end of the thread shaft. The adjustable bearing device is adopted to replace a screw jack to achieve the correction work of the horizontal direction, after correction is completed, the box bearing action can be achieved, and the impact load bearing capability of a connecting bolt of a box body and a foundation pit can be improved. Axial local fine adjustment can be achieved by spirally screwing the thread shaft, and the adjusting precision is improved; after axial pre-tightening is achieved, a rolling bearing can be adopted to eliminate the end friction force generated by rotation of the thread shaft. A spring is adopted to effectively reduce the influence of vibration of the box body on the bearing device, and the positioning stability is improved.

Description

technical field [0001] The present invention relates to a gear case supporting device, and more particularly, to a method for installing a rolling mill gear case. Background technique [0002] The power source for pipe billet transportation in cold rolling of seamless steel pipes generally adopts a feed rotary gearbox, and the complete set of the gearbox is placed in the concrete foundation pit. Since the important parts of the whole set of feed and slewing mechanism are installed in the gearbox, there are both input devices (one), output devices (three), and two motor belt transmission components, and the tube blank must also pass through the gear box. The disc shaft hole, in order to ensure the matching between the gearbox and other components, requires high installation accuracy, not only the vertical direction, but also the horizontal direction, and the parallelism with the rolling center line; usually when the gearbox body is initially installed All can meet the techni...

AI Technical Summary

Problems solved by technology

[0004] 1. Regular maintenance and fastening: It is to regularly fasten the fixing bolts connecting the lower box body (box seat) of the feed rotary gearbox and the foundation pit. Its characteristic is that the fastening operation time is less (4 hours) and can be restored Bolt tightness, but the working environment is narrow and cramped, the foundation pit cover must be opened, and the foundation pit must be opened to tighten multiple bolts one by one. , and there are certain safety hazards, and the fastening effect is not good, it can only be maintained for a short period of time, and the repetitive operation is high-intensity. Accuracy, so the hidden danger of loosening is not completely eliminated, only on-site troubleshooting

[0005] 2. Regular installation and calibration: regular (long period, usually more than 5 years, some equipment is not calibrated after installation) re-dismantle and install the feed rotary gearbox, and correct various accuracy during installation. The characteristic is that the installation The precision is high, and the problems caused by factors such as adjustment of settlement and inclination can be effectively restored to the original precision, but the shutdown time is long (seven days), and the calibration operation process is cumbersome (the screw jack has no fine-tuning function), and the tools and tools for the calibration operation The use and operation skills are relatively high, and the problem of too few bolts in the foundation pit has not been solved. After re-use, the loose fault of the gearbox body will still occur.

[0006] To sum up, there are certain deficiencies in the current treatment of the looseness of the gear box of the seamless steel pipe cold rolling mill, and corresponding improvements must be made in combination with the characteristics of the equipment and production

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