Computerized work standards :  One of the problems with operating a metal cutting machine tool is determining the speeds and feeds that should be used for a given operation. Computer programs are available to recommend the appropriate cutting conditions for different materials and operations (e.g., turning, milling, drilling).*1 pointtruefalseOther:

What type of information is typically included in a manufacturer’s technical data reference for cutting tools?POSSIBLE ANSWERS:Allowable machining operationsCutting tool diameterCalibration specificationsStorage instructions

The main cutting force acting on a tool during the turning (orthogonal cutting) operation of a metal is 400 N. The turning was performed using 2 mm depth of cut and 0.1 mm/rev feed rate. The specific culling pressure (in N/??2) is:

If the average cutting speed on a shaper is 15 [m/min] , speed ratio 0.7, work part length is 168 [mm] and both start and end allowances are 1 [mm], raw material width is 77 and start and end allowances are 1 each.  Machining time is _______ [sec].Question 3Answer176215911835

Read the text and fill in the blanks WITH ONLY ONE WORD.Machining and CNCMaching is the use of machines to cut pieces of material (called workpiece) and shape them into components. The tools used in machining, to make holes, grooves, threads, etc., are called machine tools. Metal is often machined. As it is cut, waste is produced, called swaft or chips. During machining, a liquid called cutting fluid may be pumped onto the workpiece to act as a coolant, keeping the workpiece cool. In manufacturing, machining is usually guided by computers called computer numerical control (CNC) systems. Often, design information ( on shapes and sizes of components) is fed directly into CNC systems from computer aided design/ computer aided manufacturing (CAD/CAM) software.Machining with cutting toolsMilling is cutting done by a milling machine, often using toothed cutting discs ( wheel with teeth that have sharp edges). When a workpiece is milled, it is held in a fix position on the machine, and is shaped by cutting tools which rotate (spin) while being moved over the surface of the workpiece.Turning is a technique for cutting components that have a circular cross-section. The workpiece is turned by a machine called a lathe, which rotates the workpiece. A fixed machine tool is then moved against the rotating worpiece to cut material from it.Punching: Thin materials can be cut by applying pressure in order to shear them- that is, cut them with scissoring force ( in engineering, called a shear force). Small shapes, such as circles, can be sheared from sheets using a machine called a punch which pushes a die ( a shaped tool) through the sheet.1. The waste metal produces during machining is called 2. Metal gets hot during cutting, so cutting fluid can be used as a .3. Drawings can be produced and traferred to the machining process using .4. A milling machine uses toothed cutting discs to mill a held in a fix position on the machine.5. Turning means cutting components that have a circular cross-section. A lathe is used to turn and the workpiece.

A straight turning process reduces the diameter of a cylindrical work part from 121 to 107 [mm]. The feed rate is set at 0.15 [mm/rev]. The cutting speed is set at 39 [m/min].  The work part material has a specific cutting energy of 1.5 [W.s/mm3].  Machining power in [KW] is then given by: Question 7Answer1.020.0616.672.051023.75