机械类毕业设计英文文献

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机械类毕业设计英文文献Introduciton of Machining
Have a shape as a processing method， all machining process for the production of the most commonly used and most important method. Machining process is a process generated shape， in this process， Drivers device on the workpiece material to be in the form of chip removal. Although in some occasions， the workpiece under no circumstances， the use of mobile equipment to the processing， However， the majority of the machining is not only supporting the workpiece also supporting tools and equipment to complete.
Machining know the process has two aspects. Small group of low-cost production. For casting， forging and machining pressure， every production of a specific shape of the workpiece， even a spare parts， almost have to spend the high cost of processing. Welding to rely on the shape of the structure， to a large extent， depend on effective in the form of raw materials. In general， through the use of expensive equipment and without special processing conditions， can be almost any type of raw materials， mechanical processing to convert the raw materials processed into the arbitrary shape of the structure， as long as the external dimensions large enough， it is possible. Because of a production of spare parts， even when the parts and prefer machining.
Strict precision and good surface finish， Machining the second purpose is the establishment of the high precision and surface finish possible on the basis of. Many parts， if any other means of production belonging to the large-scale production， Well Machining is a low-tolerance and can meet the requirements of small batch production. Besides， many parts on the production and processing of coarse process to improve its general shape of the surface. It is only necessary precision and choose only the surface machining. For instance， thread， in addition to mechanical processing， almost no other processing method for processing. Another example is the blacksmith pieces keyhole processing， as well as training to be conducted immediately after the mechanical completion of the processing.
Primary Cutting Parameters：
Cutting the work piece and tool based on the basic relationship between the following four elements to fully describe : the tool geometry， cutting speed， feed rate， depth and penetration of a cutting tool.
Cutting Tools must be of a suitable material to manufacture， it must be strong， tough， hard and wear-resistant. Tool geometry -- to the tip plane and cutter angle characteristics -- for each cutting process must be correct.
Cutting speed is the cutting edge of work piece surface rate， it is inches per minute to show. In order to effectively processing， and cutting speed must adapt to the level of specific parts -- with knives. Generally， the more hard work piece material， the lower the rate.
Progressive Tool to speed is cut into the work piece speed. If the work piece or tool for rotating movement， feed rate per round over the number of inches to the measurement. When the work piece or tool for reciprocating movement and feed rate on each trip through the measurement of inches. Generally， in other conditions， feed rate and cutting speed is inversely proportional to.