International Journal of Engineering Applied Sciences and Technology, 2022 Vol. 7, Issue 4, ISSN No. 2455-2143, Pages 227-232 Published Online August 2022 in IJEAST (http://www.ijeast.com) 227 A FRAME WORK FOR SEAMLESS INTEGRATION OF DESIGN AND MANUFACTURING USING CNC Sreeramulu Dowluru, Roopsandeep Bammidi, Patta Srinivasa Rao, Kummari Tavitiraju, Nemalipuri Manisankar, Banki Sunil Kumar Department of Mechanical Engineering, Aditya Institute of Technology and Management (A), AITAM, Tekkali, India – 532201. Abstract: Machining is an important manufacturing process that is used in a wide range of applications. From aerospace applications to the manufacturing of energy systems we see a major reliance on machining. Nowadays, CNC machining is found in many industries to aid production by manufacturing process. CNC machining is absolutely essential for manufacturing and it is important. Some major benefits of CNC machining is manufacturing are greater efficiency, more accuracy and fabrication. In this project focus on gaining an improved understanding of the mechanics of machining and different factors that contribute to part quality. The aim of this work is to develop a frame work for seamless integration of design and manufacturing using CNC machine. For this process involves some steps. The selection of the component and design a 3D model of the component using CATIA software is presented here. Later generate the tool paths and program (contains G & M codes) using Dell CAM software. A post processor is used to converts the CAM data into specific commands that can be read a machine controller to move the cutting tool along the programmed paths. After the basic selections and decisions the preparation of a program will be done. After the lots of observation will go for fabrication of component using CNC vertical milling machine to achieve a designed shape with smooth finished surface, high accuracy and less machining time which directly increases the productivity. Keywords: Machining, CNC, CATIA, CAM, G & M Codes. I. INTRODUCTION Conventional Computer numerically controlled (CNC) machining is a technology which has been in existence for some decades and is reaching what appears to be an apex, much in tune to the long history of machine tool evolution. This is important as one may realize that while it is an integral step to the industry of tomorrow, it is the culmination which has set the manufacturing industry in an entirely new direction. Development of Computer Numerically Controlled (CNC) machines is an outstanding contribution to the manufacturing industries. It has made possible the automation of the machining process with flexibility to handle small to medium batch of quantities in part production. Initially, the CNC technology was applied on basic metal cutting machine like lathes, milling machines, etc. Later, to increase the flexibility of the machines in handling a variety of components and to finish them in a single setup on the same machine, CNC machines capable of performing multiple operations were developed. A CNC machine is a motorized maneuverable tool and often a motorized maneuverable platform, which are both controlled by a computer, according to specific input instructions. Instructions are delivered to a CNC machine in the form of a sequential program of machine control instructions such as G-code and M-code, and then executed. The program can be written by a person or, far more often, generated by the graphical computer-aided design (CAD) or by the computer-aided manufacturing (CAM) software.CNC is a vast improvement over non- computerized machining that must be manually controlled (e.g. using devices such as hand wheels or levers) or mechanically controlled by pre-fabricated pattern guides. In modern CNC systems, the design of a mechanical part and its manufacturing program are highly automated. The part's mechanical dimensions are defined using CAD software and then translated into manufacturing directives by computer- aided manufacturing (CAM) software. Most new CNC systems built today are completely electronically controlled. Most CNC machines use Siemens or Fanuc made control systems. For Fanuc generally the coding is done by using G codes and M codes. G codes are used for machining operations and movement of the tools whereas M codes are used for controlling the spindle movement like on/off, rotation in clockwise or anti clockwise direction and also for tool change operations.The literature review and analysis set out the design and manufacturing of a component using 3 axes CNC milling machine which could work on its own to produce very accurate and high precision components with less time taken and with less human interventions also a conveyor belt system for transmission and pick and place