tailieunhanh - Industrial Machinery Repair Episode 2 Part 10

Tham khảo tài liệu 'industrial machinery repair episode 2 part 10', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | V-Belt Drives 459 Check sheaves for wear. Use a sheave gauge to ensure the sheave is not worn. If worn write a corrective maintenance work order to change the sheave at a later date. Risk if the procedure is not followed HIGH. Belts will slip even though you may not hear the slippage thus resulting in equipment not operating to specifications. 24 Maintenance Welding Introduction An important use of arc welding is the repair of plant machinery and equipment. In this respect welding is an indispensable tool without which production operations would soon shut down. Fortunately welding machines and electrodes have been developed to the point where reliable welding can be accomplished under the most adverse circumstances. Frequently welding must be done under something less than ideal conditions and therefore equipment and operators for maintenance welding should be the best. Besides making quick on-the-spot repairs of broken machinery parts welding offers the maintenance department a means of making many items needed to meet a particular demand promptly. Broken castings when new ones are no longer available can be replaced with steel weldments fashioned out of standard shapes and plates see Figure . Special machine tools required by production for specific operations often can be designed and made for a fraction of the cost of purchasing a standard machine and adapting it to the job. Material-handling devices can be made to fit the plant s physical dimensions. Individual jib cranes can be installed. Conveyors either rolldown or pallet-type can be tailor-made for specific applications. Tubs and containers can be made to fit products. Grabs hooks and other handling equipment can be made for shipping and receiving. Jigs and fixtures as well as other simple tooling can be fabricated in the maintenance department as either permanent tooling or as temporary tooling for a trial lot. The almost infinite variety of this type of welding makes it impossible to do more than .