Pdf manufacturing processes by hn gupta pdf download. Changes to the product design and process plan are automatically reflected in the ipm and the associat. Capp programs develop a process plan or route sheet by following either a variant or a generative approach. Download pdf book for this subject and share to give us credit. The operations are selected by the system from among its repertoire of. It takes, as input, information about the different machining. There is no specific method to create an optimum process plan and the results highly depend on the experience of the process planner. Interpretation of the part design, selection of manufacturing processes, definition of operations, operation sequences, machining datums, geometrical dimensions. Materials are removed by traversing in a direction parallel to the axis of rotation of axis or along a specified path to form a complex rotational shape. Optimization of machining strategy and process planning of. Consequently the planning activities have immense importance for competitive advantage. Process planning includes the series of activities to design the process to transform the blank into the finished manufactured part. The following list of questions is to get you thinking about some important concepts during the design process. Automatic lathe, screw machining, process plan, manufacturing dimensions, tool correction, copilotpro 1.
The ipm is a 3d representation of the state of the product at each step in the machining process. Manufacturing process planning siemens plm software. In this chapter a brief introduction to process planning and setup planning in machining is described. Most machining jobs are accompanied by a process plan that lists important information for the machine operator such as the type and order of operations, the cutting tool used for each operation, and the cutting specifications for each operation. Genericos initial product, the automaton 10, will be directed specifically at printed circuit board manufacturers. Process plan the level of details in the plan depends on the application.
However, machining processes inevitably waste material in the form of chips, production rates may be low, and unless carried out properly, the processes can have detrimental effects on the surface properties and performance of parts. The heart of the process plan is a list of machining operations to be carried out. The validation activities and results, including the date and signatures of the individual s approving the. Introduction as a result of the advances in machine tools and cutting tool technology in recent decades, many of the conventional machining processes such as turning, milling and drilling have become costeffective, flexible and highthroughput manufacturing processes for producing high precision and high. In this process casted or forged cam are in the required shape but their size is maintained by machining and finishing operation. Material removal processes machining is the broad term used to describe removal of material from a workpiece includes cutting, abrasive processes grinding, advanced machining processes electrical, chemical, thermal, hydrodynamic, lasers automation began when lathes were introduced in 1700s. Analysis of part drawing and assembly drawing this is the basis of the machining. Load the initial cam part file into the process plan. Conventional machining processes and machine tools moduleiv turning turning operation is a machining process and is used to produce round parts in shape by a single point cutting tool. Autonomous machining recent advances in process planning and control. Standardised process control system for cnc manufacturing 249 the role of the stepnc compliant probing simulator is to read this process plan and ident ify various i nspection item s. A machining process is called nontraditional if its material removal mechanism is basically different than those in.
Jain department of mechanical engineering, indian institute of technology kanpur, kanpur208016, india. You will use the drawing and the blank machining process plan on the next pages to begin the. The present paper is aimed at developing an intelligent computeraided process planning methodology based on application of a kbs for automatic generation of process plans for machining. The common nontraditional machining processes are described in this section. While using casted or forged cam only final machining is require to achieve final size within the required tolerances. The total unit cost of machining should be optimized with respect to the machining parameters such as the cutting. The requester shall provide a manufacturing request worksheet to the manufacturing poc, which will be used to determine product feasibility and to develop an estimated cost and a preliminary manufacturing schedule. Create a new part file to contain the machining line planner process plan. Cnc machining process planning productivity a qualitative survey. Manufacturing is the backbone of any industrialized nation. The introduction of abrasives to the fluid jet enhances the machining efficiency and is known as abrasive water jet machining. Automated planning and optimization of machining processes. Manufacturing and technical staff in industry must know the various manufacturing processes, materials being processed, tools and equipments for manufacturing different components or products with optimal process plan.
Process planning for rapid manufacturing of plastic. How to use a process control plan in manufacturing. There needs to be a plan for dealing with changing resource combine cycle time with takt time and available work time to schedule. However, recent developments in cam technology have minimized the dependency on skilful machinists to handle machining process planning. The complete digital planning solution for automotive. There are 10 steps to draw up machining process flow chart. This is a comparatively old process and it has several options. If you cannot answer all of these questions, do not get frustrated since some of them are open ended. A multiobjective decisionmaking method for machining. Process plans and manufacturing dimensions for the.
The collaborative computeraided machining process planning is an element in the process chain of extended enterprises in automotive engineering. A portion of a control plan for the machining of the shaft is given below. Doctor of philosophy mcmaster university hamilton, ontario title. The process control plan should be created by a cross functional team cft that has a comprehension of the process being controlled or progressed. Interpretation of the part design, selection of manufacturing processes, definition of operations, operation sequences, machining. Select source setup filters to help you allocate operations to specific machines. Both the engineering drawing and the process plan present the fundamental document for the manufacturing of products. Ability to forecast process capacity based on cycle time at the narrowest bottleneck continuous improvement may displace workers, as a reduction in cycle time often results in making more, faster, with fewer resources. An integrated process planning system for machining and inspection. This is used for removing a layer of metal material, either shallow or deep, by means of etching using chemical compounds, like acids, bases, etc.
Control plan example format for cnc machining activities. Computer aided process planningsetup planning, its various approaches and main constraints are discussed. Computer aided process planning for multiaxis cnc machining using feature free polygonal cad models by ashish mukund joshi a dissertation submitted to the graduate faculty in the partial fulfillment of the requirements for the degree of doctor of philosophy major. Machining is necessary for giving final dimension to the cam. Process planning influences time to market and productions cost. Introduction one of the daily issues of the setters of machining is to correct the shape and location of the cutting tools in order that workpieces meet the tolerances specified by the designers. Machining operations cycle time mit opencourseware. Process planning for rapid manufacturing of plastic injection mold for short run production. Process monitoring and control technology will have a greater impact in future machining systems based on openarchitecture systems e. Machining a material removal process in which a sharp cutting tool is used to mechanically cut away material so that the desired part geometry remains most common application. Traditional machining processes consist of turning, boring, drilling. Machining process flow chart is an important document to guide machining, while also ensuring the quality of processing, based on the machining process allows higher productivity and lower cost. Teamcenter softwares manufacturing process planner and easy plan applications provide an easy to use environment to author the textual instructions for operations under the bill of process bop and an autocompletion tool to reference parts, resources, and visual aids that users would like to document in shop floor work instructions.
The machining process of the spindle sleeve includes turning, drilling, and cylindrical grinding, and each part can be viewed as a different ipo model. A control plan is frequently a production part approval process ppap necessity for providers of parts to organizations in these enterprises. Therefore, the decision of the machining process plan can be optimized by making a process parameter decision for each machining process. Machining line planner enables you to define the machining details for individual features on each machine and scale up to operation ordering, balancing, and optimizing the entire line.
Optimization of machining strategy and process planning of complex geometry author. Process planning is a task comprising a broad range of activities to design and develop an appropriate manufacturing process for producing a part. Unit 9 computer aided process computer aided process. The manufacturing request phase establishes the relationship between the requester and the manufacturing poc. Pdf efficacious integration of such cax technologies as cad, cam and capp still remains a problem in engineering practice which constantly attracts. While making a part from raw material, one may require bulk removal of material, forming cavitiesholes and finally finishing as per the parts requirements. Process plan machining production and manufacturing. These ipms allow the user to verify the results of the machining operation as 3d geometry based on the process plan parameters. Pdf featurebased generation of machining process plans for.
Plan the design thoroughly with specific sketches and detailed drawings for construction and machining. Rajesh kumar, process planning for rapid manufacturing of plastic injection mold for short run production 2010. The process plan is a certificate such as engineering drawing. Process monitoring and control of machining operations. Typical workflow for a machining line process plan 1. An example of a complete business plan executive summary company generico, inc. Pdf on jan 1, 1994, hongchao zhang and others published manufacturing process planning find, read and cite all the research you need on. Add a process plan setup for each machine station in the machining line. Pdf autonomous machining recent advances in process.
808 226 1022 139 240 335 1054 357 978 1064 973 121 280 1201 753 1264 634 283 1201 911 1315 631 74 1182 1450 419 312 117 210 65 779 938 944 194 242