Grinding method Grinding method is mainly used to increase the inner diameter of the bearing and reduce the outer diameter of the bearing, so that the inner and outer diameter of the bearing re...
Imported parts are not only affected by tariffs and exchange rates when the order is placed, but the local environment of the exporting country also affects the import of domestic parts. Parts ...
The troublesome thing now is how to become the current domestic scale *big influence *big, *missed the exhibition and did not reserve a booth, some of the exhibitors are finding suitable exhibi...
When the oil change in winter does not cause wax precipitation in time, pyrolysis kerosene can be added to dissolve the desorbed wax to reduce the freezing point of diesel. High-freezing point diesel ...
Driving test of 15W/4SJ gasoline engine oil We carried out a driving test of 15W gasoline engine oil developed by Great Wall Lubricant Group Co., Ltd.* recently, such as SJ gasoline engine oil, and us...
The oil products for the storage test are all filled in tinplate circular iron drums with a capacity of 20L, a diameter of 265mm, a height of 385mm, and a wall thickness of 2.2mm. The entire test is d...
Through a comprehensive analysis of many related factors that cause locomotive signal failures, it is concluded that the normal use of locomotive signals is mainly as follows: locomotive power supply ...
Atmospheric pollution from automobile emissions (1) Hydrocarbons (CH): The cH emitted by automobiles accounts for 48% of the total emissions. Although CH is not directly harmful to human health, it ca...
Using the process plan of (2), before the punching process, because the hole is large, it cannot be guaranteed that the existing holes will not be deformed during the deep drawing, so the dimensional ...
It can be seen that the dimensional accuracy of the part processed by deep drawing can meet the dimensional accuracy requirements of the part. This part is an appearance part, which has high requireme...
Typical failure (machine failure case) example 1 On July 21, 1998, a DF4B locomotive hauled train 2203. During the journey, the locomotive crew suddenly heard a “click” in the power room, ...
The status quo of the development of China’s auto service industry is well known. China’s auto industry started relatively late and has not yet fully entered the mature stage. As a subsidi...
The actual oil film pressure in the bearing includes not only the oil wedge pressure generated by the constant speed load, but also the squeezing force generated by the circumferential and radial disp...
Through calculation and statistical results, a preliminary conclusion can be drawn after synthesis: For a large hump with heavy workload, the average number of brakes in one part of the reducer is abo...
In China, most of the molding process and mold design of automobile panels still mainly rely on the experience of designers, relying on some qualitative theoretical analysis and empirical data. Not on...