數(shù)控技術(shù)概述-文庫(kù)吧在線文庫(kù)
【正文】 ool Application NC boring mill (數(shù)控鏜銑床 ) horizontal or vertical spindle. Boring is similar to turning, except that an internal cylinder is created instead of an external cylinder. The operation requires continuous path, twoaxis control.. . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL Application of CNC Machine Tool Application NC drill press (數(shù)控鉆床 ) These machines use pointtopoint control of workhead and two axis control of the worktable. Some NC drill presses have turrets containing six or eight drill bits. . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL Application of CNC Machine Tool Application NC milling machine (數(shù)控銑床 ) It requires continuous path control to perform straight cut or contouring operations. . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL Application of CNC Machine Tool Application NC grinding machine (數(shù)控磨床 ) It is intended for finishing treatment of workparts. The grinding machine includes cylindrical, surface, internal, spindle,thread ,gearand toolgrinding machines. . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL Application of CNC Machine Tool Application Machine center (加工中心 ) It is defined as multifunction NC machines with automatic tool changer and tool has the ability to perform drilling, turning, reaming, boring, milling, contouring, and threading operations on a single machine. . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL Application of CNC Machine Tool Application Machine center (加工中心 ) Machining centers are classified as either vertical or horizontal. Vertical machining centers continue to be widely accepted and used, primarily for flat parts and where threeaxis machining is required on the surface of a single part such as the mold and the die. Horizontal machining centers are particularly used for the large,boxy, and heavy parts. . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL Application of CNC Machine Tool Application Machine center (加工中心 ) . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL Application of CNC NonMachine Tool Application Punch presses for sheet metal hole punching (數(shù)控沖床 ) The twoaxis NC operation is similar to that of a drill press except that holes are produced by punching rather than by drilling. . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL Application of CNC NonMachine Tool Application Presses for sheet metal bending (數(shù)控折彎?rùn)C(jī) ) Instead of cutting sheet metal, these systems bend sheet metal according to programmed mands. . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL Application of CNC NonMachine Tool Application Welding machine (數(shù)控焊接機(jī) ) Both spot welding and continuous arc welding machines are available with automatic controls based on NC. . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL Application of CNC NonMachine Tool Application Thermal cutting machine (數(shù)控?zé)崆懈顧C(jī) ) Such as oxyfuel cutting(火焰切割 ),laser cutting(激光切割 ), and plasma arc cutting(等離子電弧切割 ). The stock is usually flat。 (4)the feedback transducer。 (3)the servodrive unit。 however, its implementation costs are higher. . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL Types of NC ServoDrive System ClosedLoop ServoDrive Position pare circuit Speed control circuit Worktable Instruction Speed feedback signal Position feedback signal Leadscrew Servomotor . Chapter 1 INTRODUCTION TO NUMERICAL CONTROL Application of CNC The applications of CNC are divided into two categories: (1)Machine tool applications。 (2)The type of servodrive system。NUMERICAL CONTROL TECHNOLOGY Chapter 1 Introduction to Numerical Control Teacher Xu Cijun 13872082953
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