【正文】 s Certificate and is not allowed to drink driving cranes. (4) Operating must focus on the spirit, not talk, smoking or do not do. (5) To cl。 Some of the clamp punctured ingot mould, with Ingot filed small pair of pliers. Feeding Crane: Charge will be added to the open hearth furnace. Trolley bottom of the column with the pickand inciting material to me and it into the furnace. The main column to bypass the vertical axis rotation, pickand rotary can swing from top to bottom. Deputy car repair furnace for such auxiliary operations. Fing Crane: to meet with hydraulic fing large workpieces. Trolley displayed on the main hook up special feeder to support and flip the workpiece。 as far as possible the elimination of drive space and reduce deadzone inverse error and improve displacement precision. Linear Roller Guides outstanding advantage is seamless, and can impose prepression. By the rail body, the slider, ball, cage, end caps and so on. Also known as linear rolling guide unit. Use a fixed guide body without moving parts, the slider fixed on the moving parts. When the slider moves along the rail body, ball and slider in the guide of the arc between the straight and through the rolling bed cover of Rolling Road, from the work load to nonwork load, and then rolling back work load, constant circulation, so as to guide and move the slider between the rolling into a ball. Bridge Crane Bridge crane is having an elevated track running in a bridgetype crane, also known as the crane. Bridge Crane in the laying of the bridge on both sides along the elevated track on the vertical run, lifting trolley along the bridge laying on the track in the horizontal operation, a scope of work of a rectangle, it can take full advantage of having the space below lifting materials from the ground equipment hindered. Bridge Crane widely used in indoor warehouses, factories, wharves and open storage yard and other places. Able to carry items, stood up, lifting status, and adjust operations, mainly for the workshop, sections and steel production lines yard, etc.. Lifting capacity usually in the 10 to 100 t. Bridge crane itself for horizontal movement, the winch frame for the vertical movement of the winch suspended from the hook for vertical movement, the direction of movement of three of the crane can work. In order to prevent bridge crane driver not clear in the specific hook campaign, on the ground are equipped with lifting the general mand or folder, put hook. If hanging overhead crane hoisted electromagic lifting plate, often operated by the drivers themselves. Bridge cranes can be divided into general overhead crane, simple girder bridge crane for bridge crane and metallurgical three. Ordinary general overhead crane from lifting trolley, having run institutions, having posed of a metal structure. Lifting up from the car and from institutions, agencies and the car running small frame consists of three parts. Lifting bodies, including the motor, brakes, reducer, and the pulley drum group. Motor through the reducer, driven rotating drum so that the wire rope around or down to lifting weights. Small frame is from the brackets and install or run agencies and institutions, such as car parts rack, usually welded structure. Crane running the driving mode can be divided into two categories: one category is the concentrated drive, which uses a motordriven initiatives on both sides of the drive shaft driven wheel。 transmission ponents to ensure accuracy, the use of prerational, the form of a reasonable support to enhance the stiffness of transmission。 (e) noise. For moderate loads and speeds the correct selection of a standard bearing on the basis of a load rating will bee important where loads are high,although this is usually of less magnitude than that of the shafts or other ponents associated with the bearing. Where speeds are high special cooling arrangements bee necessary which may increase fricitional drag. Wear is primarily associated with the introduction of contaminants,and sealing arrangements must be chosen with regard to the hostility of the environment. Because the high quality and low price of ball and roller bearing depends on quantity production,the task of the machine designer bees one of selection rather than design. Rollingcontact bearings are generally made with steel which is throughhardened to about 900HV,although in many mechanisms special races are not provided and the interacting surfaces are hardened to about 600HV. It is not surprising that,owing to the high stresses involved,a predominant form of failure should be metal fatigue, and a good deal of work is based on accept values of life and it is general practice in bearing industry to define the load capacity of the bearing as that value below which 90 percent of a batch will exceed life of one million revolutions. Notwithstanding the fact that responsibility for basic design of ball and roller bearings rests with he bearing manufacturer, the machine designer must form a correct appreciation of the duty to be performed by the bearing and be concerned not only with bearing selection but with the conditions for correct installation. The fit of the bearing races onto the shaft or onto the housings is of critical importance because of their bined effect on the internal clearance of the bearing as well as preserving the desired degree of interference fit. Inadequate interference can induce serious trouble from fretting corrosion. The inner race is frequently located axially by against a shoulder. A radius at this point is essential for the avoidance of stress concentration and ball races are provided with a radius or chamfer to follow space for this. Where life is not the determining factor in design, it is usual to determine maximum loading by the amount to which a bearing wil