Design of automated moving fixture for conveyorised special purpose machine. Determining the success of the fixture requires running a program and evaluating the quality of the parts produced. Fixture configuration design is an important issue in the domain of cafd. Frank department of industrial and manufacturing systems engineering iowa state university, ames, ia 50010 abstract rapid prototyping techniques for cnc machining have been developed in an effort to produce functional prototypes in appropriate materials. The purpose of this paper is to present a methodology for the automated design of a fixturing system for a rapid machining process. Patil3 1 research scholar me student, department of mechanical engineering, stess rmd sinhgad school of engineering, pune, maharashtra, india 2 professor, department of mechanical engineering. This paper focuses on a technical problem involved in the development of automated fixture planning systems, that is, the accessibility analysis of a fixturing surface on workpiece. Information support of the computeraided fixture design system. A geometric approach to automated fixture layout design.
An automated modular fixture design system has been developed in our previous study. Pdf a modular fixture system is a flexible alternative to a dedicated fixture. Design a fixture to allow the automatic welding of the part. Fixture design deals with the establishment of the basic fixture concepts. A clamping design approach for automated fixture design. An approach to automating modular fixture design and. Hui wang, yiming kevin rong, hua li, price shaun 4 their work gives brief literature survey of computer aided fixture designing and improvements automation in fixture designing. Introduction to automated test fixtures circuit check. Proper fixture design is crucial for developing product quality in different terms of accuracy, surface finish and precision of the machined parts in existing design the fixture set up is done manually, so the aim of this. Design and automation of igbt test fixture using plc. This will allow all of the surfaces on the work piece to be welded without refixturing the work piece.
A first approach in the implemen tation of a knowledge model applied to machining fixture design has been developed by hunter 9. An automated modular fixture configuration design system has been developed and applied to industrial practice. To design and build a high performance test system, an engineer must understand how the. Occasionally programmers forget to consider the tool path on the. A system architecture of three fixture design stagesconceptual, layout, and detail designis then proposed and its implications on process planning tasks discussed. Fixture design nageswara rao posinasetti february 26, 2008 2 fixtures a fixture is a means through which a part is securely fastened to the machine tool table to accurately locate, support and hold the part during the machining operation. Fixtures are large permanent structures that are costly to design, manufacture and install. Omit areas such as inside corners, unrelieved pins, or similar features from the design. Many productivity gains are realized, or lost, at the design stage and while parts fixturing performs a role that is simple, good fixture design is critical to the success of a robotic welding system.
Since dedicated fixtures are commonly used in mass. Design and analysis of welding fixture for automotive. When fixturing an automated machine, check the complete tool path before using the workholder. Automated generation of fixture configuration design. Information support of the computeraided fixture design. Design of automated moving fixture for conveyorised special. Avoiding redundant location another condition to avoid in workholder design is redundant, or duplicate, location. Automatic fixture removal afr, option 007, is the easiest way to remove fixture effects from noncoaxial device measurements. This paper proposes a method for automated fixture layout design. Pdf fixture design system with automatic generation and.
Whereas a jig holds, locates and as well as guides the tool. The key steps toward automation of the fixture planning and. With stepbystep guidance and associativity to part designs, you can work with even the most challenging tooling and fixture designs. Automated fixture design for a rapid machining process wutthigrai boonsuk matthew c. The procedure is able to determine and evaluate optimal fixture configurations from the description of the workpiece and the assembly task. Machine tools, material handling devices, transport and other mobile equipment, aviation systems, etc. The solution presented consists of a fixture design concept consisting of design rules which allow implementation into a tool for automated fixture design.
Efforts to automate the fixture design process using intelligent cad systems have not been taken beyond the prototype stage, mainly because of impediments which include the requirement of complex data structures to represent the workpiece and its attributes. Whereas the jigs are made lighter for quicker handling, and clamping with the table is often unnecessary. It is essential to find out deformation of workpiece under various loads is a challenging task. Big cost drivers are involved in aircraft assembly and assemblyrelated. The fixture is designed using basic fixture design principles as well as weld specific guidelines. Mar 27, 2009 the purpose of this paper is to present a methodology for the automated design of a fixturing system for a rapid machining process. The application of this kind of procedure has the advantages of making the fixture design information completely. The results presented in this thesis are based on four experimental studies carried out in the automotive and aerospace industries covering different aspects of modular and reconfigurable fixtures with manual, automated and active features. A fivestep wizard guides you through the process to characterize your fixture and remove it from your measurement. The 321 method is the fundamental principle for all types of fixture design.
Hendriksen jig and fixture design manual industrial press inc. Nucleo fixture creates an interlocked grid of x and y fixture blades connected to a mating base plate from an imported solid cad model. Read automated planning and design of fixtures for complex parts, international journal of computer applications in technology on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. Automated fixture design for a rapid machining process. Phase i 1 project summary the objective of this project was to research technologies to improve and speed fixture designs within tinker afb. Design and analysis of welding fixture for automotive component using fea c. Paper open access design, modelling and manufacturing of 16. Redundant locators restrict the same degree of freedom more than once.
Fixture design system with automatic generation and modification of complementary elements for modular fixtures. In this context not only product design processes need to be adapted but also development of production processes and manufacturing equipment. From concurrent engineering to fixture design for machining systems, from robotics and artificial intelligence to facility layout planning and automated cadbased inspection, this handbook provides all the information you need to design, plan, and implement a modern, efficient manufacturing system tailored to your companys special needs and. A geometric approach to automated fixture layout design article in computeraided design 423. Testing the fixture first requires setting up a program for the robot to run.
Chip control must be addressed in the design of any jig or fixture. The focus of this paper is in fixturing of complex parts. Fixture design process automation for coordinate measuring. Pdf an automatic fixture design system for creating prismatic parts. International journal of engineering research and general. Type and capacity of the machine, its extent of automation. Each of these variables needs to be tested and carefully controlled to minimize defects in the produced parts.
Automatic fixture removal afr, is the easiest way to remove fixture effects from noncoaxial device measurements. The place of the cafd among other automated systems is considered and the data flows are found. February 26, 2008 3 fixtures in addition to the function of holding the. The top profile of each x or y blade matches the underside of the component at the blades insertion position, creating a cradle into which the component is located. State these requirements as broadly as possible, but specifically enough to define the scope of the design project. All of these parameters are controlled manually for the welder at cal poly.
Design and development of automated fixture for seam. Request pdf a clamping design approach for automated fixture design in this paper, an innovative clamping design approach is described in the context of computeraided fixture design activities. International journal of engineering research and general science volume 2, issue 2, febmar 2014. Fixture design plays an important role at the setup planning phase. Various types of fixtures like drilling fixtures, milling fixtures, and welding fixtures are used in industry. Proper fixture design is crucial for developing product quality in different terms. Welding fixture with active position adapting functions. Check both the machining cycle and return cycle of the machine for interference between the cutters and the clamps. This paper presents an approach which allows automation of fixture for seam welding machine. Paper open access design, modelling and manufacturing. Below is a general representation of an automated test fixture. Request pdf a clamping design approach for automated fixture design in this paper, an innovative clamping design approach is described in the. Our main goal is to give the fixture increased versatility, and to do so we will design the fixture with two degrees of freedom. The importance of fixture design automation is emphasized by djordje vukelic michael stampfer, 2008.
Automated fixtures are widely used for reducing human efforts. Fixturing surface accessibility analysis for automated. Introduction to automated test fixtures testing of electronic assemblies involves three elements. The evolution of artificial intelligence techniques has led to more automated environments being. Pdf design and development of automated fixture for seam. Boring fixture may have characteristics of a drill jig or a mill fixture. Pdf in machining fixtures, minimizing workpiece deformation due to clamping and cutting forces is essential to maintain the machining accuracy. A literature survey of fixturedesign automation springerlink.
Describing the 2d3d object surface for fixturing by a set of discrete candidate points, the method selects 47 points among them such that the fixels put therein can grip the object with superior performance in immobilization and localization. The challenge for a test engineer building a sophisticated test system is that instrumentation may need to measure. Scheme of 321 fixture setup guohua qin, weihong, zhang min wan, 2006. Handbook of design, manufacturing and automation wiley. The solution presented consist of a fixture design. We developed automated fixture for seam welding machine for reducing human effort and for greater stability of work piece. The design of fixtures is a highly complex and intuitive process. In this paper, an automatic modular fixture design system is. Automated fixture design for concurrent manufacturing. Bansal et al 18 made an indirect feature recognition.
Industrial and manufacturing systems engineering publications. Read a clamping design approach for automated fixture design, the international journal of advanced manufacturing technology on deepdyve, the largest online rental service for scholarly research with thousands. When beginning a new project for robotic arc welding, consider these fixture design objectives. Automate the entire tool development process including part design, tool assembly layout, and detailed tooling design and validation using advanced nx functionality. Fixture design system with automatic generation and modification. Data needs, reasoning models, and functional requirements of automated fixture design systems are first analyzed.
At the example of fixture design, this paper presents an approach which allows an agile provision as well as a reconfiguration of equipment. The fixtures are heavier in construction and are bolted rigidly on the machine table. A program procedure for the design of fixtures to fit varying working conditions has been developed. A fixture holds and positions the work but does not guide the tool. During the machining process, sacrificial supports emerge incrementally and, at the end of the.
Fixture layout is an embodiment of the concepts in the form of a spatial configuration of the fixture, fixture element design is concerned with. The application of this kind of procedure has the advantages of making the fixture design. The jig and fixture are tools used for holding the work piece in a correct location for mass production. Algorithm for automated fixture planning with overhead clamps. Design of automated moving fixture for conveyorised. Fixture design consists of a number of distinct activities. Design and development of automated fixture for seam welding. The 321 principle of jig fixture design learn the basic.
Proper positioning of fixture clamp and other fixture units leads. General structure of the automated design system shown in figure 2 with a highlight on the fixture design systems and their main characteristics. This paper focuses on a technical problem involved in the development of automated fixture planning systems, that is, the accessibility analysis of. The vocabulary often used to define fixture based test systems include. Provides a full understanding of the design and application of fixture tools and checking fixtures, welding fixtures and procedures, threedimensional space in checking compound warped surfaces, measurement systems, and the simple mathematics required. Problem statement design, modelling and manufacturing of hydraulic fixture with automated clamping system for machining rear flange on vmc 640 of pallet size 800 mm x 500 mm. With the aid of cadcam technologies, it becomes feasible to automate fixture design, especially. The key steps toward automation of the fixture planning and design 80 looks for an existing fixture solution in the database on the basis of the workpiece code. Automated fixture design for a rapid machining process by. Computeraided fixture design cafd has become a research focus in implementing fms and cims. The long lead time for jig and fixture design is a serious bottleneck in modern manufacturing. To initiate the fixturedesign process, clearly state the problem to be solved or needs to be met. Their design, manufacture and installation can be significant with long lead times. The key steps toward automation of the fixture planning.
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