In the modern coal mine fully mechanized mining production process, the reducer used by the coal mining machine and the conveyor often has high power, high frequency of use, working environment, plus downhole maintenance + and so on. It is easy to cause local friction damage in the transmission part of the reducer, especially the contact surface between the bearing and the casing is most likely to wear, resulting in the scrapping of the entire reducer. Therefore, it is very necessary to find a simple and safe and reliable repair and wear process. In recent years, after we have explored and practiced, we have found a relatively simple repair and method. After tracking and repairing the 60-fold reducer casing of Pingmei Group, the results show that the repaired reducer casing is in good condition and reaches The intended repair purpose. In the following, taking the 1st-order contact surface of the shaft bearing which is easy to wear by the reducer as an example, the basic repair process of the damaged surface processing and the inlay sleeve is introduced, and it is hoped that the peers can refer to it.
2 Preparation before repair Firstly, disassemble and disassemble the reducer housing to be repaired, wipe the worn surface clean, expose the original appearance, check the wear of the damaged part, measure the specific size, and provide the bearing that matches the wear surface according to the actual judgment or the user. Or the size of the shaft. Secondly, the wear surface of the casing is used to avoid the blindness and luck of equipment maintenance management.
3 From the macroscopic level of 4 to 5 palms, the state of preparation for the line, to achieve unified arrangements. Thereby achieving the true purpose of preventive inspection and maintenance, to prevent the occurrence of major accidents.
4 The formalized systemized cycle maintenance inspection management mode is also applicable to the maintenance management of electromechanical equipment in other fields; 1 Li Yuwen. Foreign equipment management mode and development trend. Equipment management and dimension diameter and wear degree determine the scope and size of the repair is 1 0 is the original aperture size, the length of the wear surface, and then according to the working environment of the shell material to be repaired to determine the material and size required for repair, 2 The size is known to cut 7.
3 repair process 1 upper and lower shells fixed in the boring hole, put clean 2 Yuchen, Zhang Xinmin. An optimization model for the maintenance period of the comprehensive equipment based on the principle of minimum operating cost. Coal mining machinery, 200乜5254(2) Wang Xiaobin analyzes some measures to strengthen the management of mechanical and electrical equipment. Coal Mine Machinery graduated from the Electrical and Mechanical Department of Fuxin Mining College and directly engaged in the management of mechanical and electrical equipment, and published many papers.
The upper and lower casings of the reducer are fixed and fixed according to the original position. If the contact surface is deformed or uneven, it should be ground and leveled first. The upper key bed should be aligned with the original reference surface and hole of the reducer to ensure the hole and deceleration. The machine (2) determines the machining size of the sleeve according to the actual size of the impact hole. 3 When selecting the blank size of the insert, there should be sufficient machining allowance, medium 4=35 1 diameter;
3 processing 0 to process the selected brown sugar 1 into a semi-finished product size, the semi-finished product is milled from the middle, the cutter thickness is 35, the two half sleeves after milling are recombined, and spot welding is performed on both end faces, so that The two halves are made into bodies. However, the solder joints should not be too large, so as to ensure that there is a certain strength when the fine car is not welded; the spotted welded casing is refined to the outer diameter of the finished car, and the welding points on both ends of the casing are ground by hand grinding. The casing is re-divided and the upper and lower casings of the reducer are separated. The two halves of the casing are respectively placed in the groove of the keyhole to find the positive position, and the sleeve and the casing are matched with the threaded hole of the countersunk head, and the inside of the casing is 20 or so. The number of 6 PCT 8 threaded holes in the elbow is determined by the size of the male and female, and the sleeve and the housing can be fixed firmly.
After cleaning the surface of the pupil with the outer surface of the cannula with alcohol, adjust the galena gel and apply it evenly and uniformly. 1. The shell surface and the outer diameter surface of the sleeve. Immediately after the glue is applied, the sleeve is bonded to the pupil surface of the housing. The plate sinking 1 screw fixes the boring surface of the casing 1 tightly in the method of lifting the upper and lower casings.
1. The casing 2. The casing 5 is in the fine mirror for a certain period of time. When the casing and the boring surface are completely bonded together, the lower and lower casings of the reduction casing are assembled into a body and fixed by bolts in place. After the whole break, the original working surface of the reducer is used as a reference to find the positive pressure, and then the inner hole of the sleeve is processed into the original aperture size of the reducer casing.
Zhengyang Yanggong Institute of Technology is currently the director of the Research Institute of Pingdingshan Coal Machinery Plant and is engaged in technical work.
Received the date of 2002, the study on the factors affecting the precision of the oil cylinders in the 02 cylinders. With the promotion and application of the single hydraulic props in the fully mechanized mining face, the processing and repairing of the cylinders is also increasing. The use of honing processing technology is to improve the accuracy of the cylinders. Reducing scrap rates plays a crucial role. To this end, the Changzhou Science and Technology Development Research Institute of Zhangzhou Mining Group Corporation has recently carried out research on the factors affecting the accuracy of cylinder grinding.
In the honing process, the main factors affecting the quality of the honing of the cylinder are the selection of the honing machine. The selection of the honing process parameters includes the honing speed, the honing pressure, the honing stone size, the honing fixture, the workpiece condition of the workpiece to be smashed. This study analyzes in detail the effects of the above factors on honing processing, and theoretically finds the optimal parameters of the honing process parameters. The team members pointed out that in order to obtain better processing accuracy and good surface quality of the cylinder, in addition to the correct selection of process parameters, the relationship between the parameters needs to be handled.
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