1 Improve the overall quality of the operator The use of the CNC machine is more difficult than the use of ordinary machine tools, because CNC machine tools are typical electromechanical products, which involve a wide range of knowledge, that is, the operator should have electromechanical liquid gas and so on. Wide professional, so the operator's request for the mountain side is very high. The current phenomenon that cannot be ignored is that there are more and more users of CNC machine tools, but the utilization rate of the machine tools is not high. Of course, sometimes the production tasks are not full. It seems that the key factor is that the quality of the operators is not high. When you encounter some questions, you don’t know how to deal with them, especially the new machine tools are affected by the quality of Yin electronic components and the vibrations in transportation. In the 36 months after the official production, the CNC system has some accompanying phenomena. Often it is not found in the maintenance book, or it may have never been encountered before. This requires the user to have a higher quality, can calmly ask questions, be clear-headed, have strong on-site judgment, and of course should have Solid CNC foundation and so on. Under normal circumstances, the machine tool manufacturer will provide users with technical training opportunities when purchasing new machine tools. Although the time is not long, d is given a violation of T sampling, and the 1 control law is still used and controlled. Practice has proved that this method controls the accuracy of the comparison. If the secondary position is compiled with a speed accuracy, the needle is very strong, 1! Should be given 1 view. The person to be sent should include the machine operator of the future. The comprehensive quality of the operators is not always a matter of time, but it must be sustained for a long time, and should be accumulated in the future use. There is also a way to try to visit the old users of similar machine tools. They have strong practical experience. Have the most say and ask for their help. Let them train the operators, which is the most effective way to improve the overall quality of the operators in a short period of time. 2 Follow the correct operating procedures No matter what machine, it has its own operating procedures. It is not only an important measure to ensure the safety of operators, but also an important measure to ensure the quality of equipment safety products. The user must first make it idling for a few minutes according to the operation. Pay attention to the sequence of power-on and shutdown and the precautions during the operation. For example, the first step is to manually return the reference point manually. These should be paid more attention to the teaching in the college. Because the college is in the teaching, the operators of CNC machine tools are students, they lack the corresponding operation training, and often make it easy to make 3 good environment in this area with the advancement of science and technology. Generally speaking, there is no harsh requirement for the use environment of CNC machine tools, and it can be placed in the production workshop of ordinary machine tools. That being said, because CNC machine tools contain a lot of dust vibrations. This uniformity can cause the electronic elementary enamel to be corroded and deteriorated or cause short circuit between components, causing the machine to operate abnormally. These have been paid attention to when installing the machine tool. For the user, the main concern is the protection of the surrounding environment. For example, when it rains, pay attention to + bring the umbrella to the production site, change the shoes, etc. Reached 104. University researcher. Master, small diesel engine body valve tappet hole processing Jiang Subin College of Mechanical Engineering, Wenzhou University, Wenzhou, Zhejiang 325027 1 Small diesel engine body valve tappet hole processing requirements The body is the key to the Chai Miao machine, such as 165 175,80 The body of the 853195 and other models are horizontally similar in structure. The village is made of 120 gray cast iron. The multi-viscosity and high-volume middle-valve tappet hole of the hole system is long due to the small aperture, and the internal processing of the deep body is difficult; for example, 1; 75 feed and 18, bar, its traits are 0 yang 8, the length of the hole 4, the surface roughness is 6 and the distance from the rear end of the body is 190mmfll222mmJj; the RmtWtjin rod hole axis is perpendicular to the camshaft axis. Detailed, 1. The annual output is more than 30,000 pieces. 2 Valve tappet hole processing scheme 2.1 Arrangement of the processing procedure The arrangement of the normal processing procedure is as follows: Since the pre-processing is the casting surface, some factories have arranged the order of the center hole in order to guide the drill bit. The traditional addition, the process arrangement is the drill expansion, but in fact, due to the above processing conditions, the use of reaming immediately after drilling is difficult to correct the defects of the drilling process leaving eccentricity. Therefore, the post-drilling boring scheme is currently used to create better processing conditions for the next reaming process. The squeezing and squeezing should be arranged in the same equipment sub-clamp to ensure the positioning. 4 Increase the starting rate of the machine as much as possible. If the machine is purchased, if its starting rate is not high, but the funds invested by the user cannot be used for reproduction. There is also a worrying question. It is likely that the warranty period has expired. In case of equipment failure, additional maintenance costs are required, as the newly purchased equipment has a fixed warranty period. From the past experience, the initial failure rate of 0 equipment is relatively large, and users should be fully satisfied during this period. The weak link is exposed as early as possible and can be resolved within the warranty period. Usually lack of production tasks, especially the numerical control machine tools of colleges and universities. In general, except for teaching, there are almost no production tasks, and they can't be idle. This is not the protection of equipment. On the contrary, due to long-term use, it may speed up the electronic elements due to damp and other reasons. Deterioration or damage to the device. The user should be energized regularly, each time running for about 1 hour, using the machine swimming, the heat said, remove the humidity inside the machine, 5 calmly treat the machine tool failure, the machine will inevitably have some failures in use. Operators should be treated calmly, and should not be handled blindly, so as to avoid the situation before and after the more serious obstacles, and participate in the joint analysis. If the fault is eliminated as early as possible, the operator should learn from the experience in time to avoid repeating the mistake. Edit Zhang Xinlong (Finish)
The Tapered Roller Bearing belongs to the separation type bearing, and the inner and outer rings of the bearing have a conical raceway. This type of bearing is divided into single, double and four row Tapered Roller bearing according to the number of the roller. The single row tapered Roller Bearing can bear the radial load and the single direction axial load. When a bearing is subjected to a radial load, an axial force will be produced, so another bearing that can withstand the axial force of the opposite direction is needed to balance it.
There is a single row tapered roller bearing outer ring, the inner ring and a conical roller by maintaining a basket frame into the inner module. The outer ring can be separated from the inner ring assembly. According to the standard of the ISO tapered roller bearing dimension, any standard type tapered roller bearing outer ring or inner ring assembly should be able to achieve international interchangeability with the same type of outer ring or inner ring assembly. For example, the outer ring of the same type should conform to the ISO492 (GB307) rule besides the external dimension and tolerance. The conical angle of the inner ring assembly and the diameter of the component cone must also comply with the relevant provisions of the interchangeability.
Tapered roller bearings are widely used in automobile, rolling mill, mine, metallurgy, plastic machinery and other industries.
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Usually, the conical angle of the outer raceway of the single row tapered roller bearing is between 10 degrees ~19 degrees, and it can simultaneously bear the joint action of axial load and radial load. The larger the cone angle, the greater the ability to bear the axial load. The bearing of the big cone angle, the postposition code plus the B, the cone angle between 25 degrees ~29 degrees, can bear a large axial load. In addition, the single row tapered roller bearing can adjust the size of the clearance during the installation process.
The outer ring (or inner ring) of a double row tapered roller bearing is a whole. The two inner ring (or outer ring) has similar small end faces, and the middle has a spacer. The clearance is adjusted by the thickness of the spacer, and the pre interference of double row tapered roller bearings can also be adjusted by the thickness of the spacer.
The performance of the four row tapered roller bearing is basically the same as that of the double row tapered roller bearing, but the radial load of the double row tapered roller bearing is greater than that of the double row tapered roller bearing, and the limit speed is slightly lower, which is mainly used for heavy machinery.
Multi seal double, four row tapered roller bearings, ZWZ provides long life, multi seal double, four row tapered roller bearings. The new design of the bearing is personalized and the traditional design method of the fully sealed bearing is changed. A new seal structure combined with seal and dust-proof is adopted to improve the sealing effect and improve the sealing performance. Compared with open structure bearings, the life of multi seal double and four row tapered roller bearings increased by 20% to 40%, and the consumption of lubricants was reduced by 80%.
