A jig differs from a fixture in that a it guides ppt. Ppt jig and fixture design malaysia powerpoint presentation. Implement the design the final phase of the fixturedesign process consists of turning the chosen design approach into reality. A jig is a workholding device that supports, holds, locates a workpiece and also guides the cutting tool for the desired machining operations. Omit areas such as inside corners, unrelieved pins, or similar features from the design. The 321 method is the fundamental principle for all types of fixture design. Our ability to cater to your requirements in providing customized and innovative designs for your new product along with the best customer services. Unit 1 deals with objectives of tool design, functions, types, elements and advantages of jigs and fixtures, principles of location and clamping, locating methods and devices, drill bushes and jig. A book of practical counsel revis oxford fourth edition english. Jig is a fixture with an additional feature of tool guidance. Pada dasarnya, jig yang kecil tidak dibautdipasang pada meja kempa gurdi drill press table. Mar 24, 2017 shows how vblocks, screws, tapered pins, buttons, cams, wedges, clamps, and jigs are used to hold work securely and locate its position accurately.
New machine tools, highperformance cutting tools, and modern manufacturing processes enable todays industries to make parts faster and better than ever. The main purpose of a jig is to provide repeatability, accuracy, and interchangeability in the manufacturing of products. Redundant locators restrict the same degree of freedom more than once. Design of drill jig free download as powerpoint presentation. This will stop the movement along zaxis, rotation with respect to xaxis and yaxis. We custom design and build jigs and fixtures according to your exacting requirements. Aug 04, 2015 the application of jigs and fixtures in manufacturing operations lead to the production of faster, more accurate, and reliable products at a reduced cost. The fixtures are heavier in construction and are bolted rigidly on the machine table. Requirement of a drill jig quick and accurate location of the workpiece easy loading and unloading of the workpiece prevention of wrong loading prevention of bending or movement of the workpiece during drilling operation ample chip clearance facility for swarf removal and cleaning. Design and analysis of welding fixture for automotive.
Final details are decided, final drawings are made, and the tooling is. Lecture 34 design and applications of jigs and fixtures. Whereas a jig holds, locates and as well as guides the tool. Design and fabrication testing of combined multipurpose. If the jig or fixture is to maintain desired repeatability, the workholder must be designed to accommodate the workpieces locating surfaces.
The size of the fixture varies from being simple to expensive and complicated. Usability the design of the jigs and fixtures should ensure ease of use as well as safe handling and moving the jig or fixture on the machine accuracy it should be consistent firm and quick to accurately locate the blank in the jig or fixture in reference to. Design and fabrication of work holding device for a. Jan 30, 2020 a jig is a workholding devic e that holds, supports, and locates the workpiece and guides the one or more tools to perform a specific operation.
Fixture design drawings are typically sketches captured on paper. February 26, 2008 29 milling fixtures the design should permit as many surfaces of the part to be machined as. Capture the engineering requirements your fixture design must meet, along with any helpful notes, in an electronic format like microsoft word. It can be defined as the incorporation of design feature in the jig or fixture that will make it possible to lead the work into jig and fixture, in an improper position, but will not interfere with loading and unloading the work piece. Sometimes, to prevent damage to workpieces, they are made from nylonfibre. With the right jig and fixture design, we are able to help our valued customers save money as well as time in manufacturing operations. The jigs and fixtures are the economical ways to produce a component in mass. Okvise is a wellrecognized international trademark, best known as an original inventor and manufacturer of the wedgeoperated lowprofile clamps. Document and manage engineering changes using the eco templates. Production engineering, mass production devices, jigs and fixtures. The position of workpiece should be accurate with respect to tool guiding in the jig or setting elements in fixture. A device that holds the work and locates the path of the tool.
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. Depending upon the mutual relation between the work piece and the pin. The design of jigs and fixtures should be such that it would not permit the workpiece. How is the 321 location principle used for designing of jigs and fixtures. Jigs and fixtures are production tools used to accurately manufacture duplicate and interchangeable parts. Design considerations for an assembly jig page link. A fixture is a work holding device which holds and positions the workplace. International journal of engineering research and general. Geometry tells us that three points are required to define a plane. Because paper files are easy to misplace and get worn over time you should scan all your hard copy drawings.
A case of milling fixture with hydraulic clamping is discussed. Six points location of a rectangular block considering the six degree of freedom of a rectangular block as shown in figure it is made to rest on several points on the jig body. A fixture or jig is to be designed for cutting the slot in batch production. Jigs and fixtures should be sufficiently stiff to secure the preset accuracy of machining. The main difference between the jig and fixture is given in table 1. Jig and fixture design design of jig and fixture pdf jig fixture jig and fixture jig and fixture ppt jig fixture book vijay ramnath jig fixture stanchion light fixture 16058a test fixture closet light fixture meter sizing by fixture counts pull chain light fixture usercentered design, activitycentered design, and goaldirected design modeling the collaborative design of the automotive. Whenever a jig is made for a compo nent part of a machine, it is almost always required that a corre sponding jig be made up for the place on the machine, or other part.
Jig biasanya dilengkapi dengan bushing baja keras untuk mengarahkan mata gurdibor drill atau perkakas potong lainnya. Practical guide for jig and fixture design bright hub. Purposes of jigs and fixtures and their design principles nptel. The application of jigs and fixtures in manufacturing operations lead to the production of faster, more accurate, and reliable products at a reduced cost. In this article we explain why its important to capture and document your fixture and jig design information, and offer some tips for documenting fixture and jig design data. Type of fixtures milling fixtures fixture components fixture design considerations sequence in laying out a fixture fixture components fixture base fixture components and the workpiece are usually located on a base, which is securely fastened. Provide a rest to workpiece on three points on the bottom xy surface. They are based on the first law of kinematics or kinematic principles of location, that states a body in space has 6 degrees of freedom.
Introduction and difference between jig and fixture definition of fixture and jig fixtures, being used in machine shop, are strong and rigid mechanical devices which enable easy, quick and consistently accurate locating, supporting and clamping, blanks against cutting tools and result faster and accurate machining with consistent quality, functional ability and interchangeability. Jig and fixtures are made from a variety of the materials. For a machining work, like drilling a through hole of given. What are the design principles of jigs and fixtures. Jigs and fixtures instructional objectives this lesson will enable the students i define fixture and jig that aid machining ii conceive the purposes of use of jigs and fixtures iii state the design considerations for jigs and fixtures iv illustrate the methods of a locating b supporting and c clamping of blanks. A jig is a workholding device that holds, supports, and locates the workpiece and guides the one or more tools to perform a specific operation in other words, this can also be defined as, used for holding the tools and also guiding the cutting tools. Locating elements locating elements position the workpiece accurately with respect to tool guiding elements in the jig. May 05, 2015 design principles common to jigs and fixtures there are some principles which are useful to design jigs and fixtures. High speed, feed and depth of cut can be used in machining with the help of jigs and fixtures 3. Table 1 comparison between jigs and fixtures basis jig fixture. Lecture series on manufacturing processes ii by prof. Slide grinding machine enxinhaijig grinding machine ppt 1 vadodara institute of engineering name batch c, how to make a simple jig for grinding drills on your. It will be a fixture, not jig, since there is no need of making. Whereas the jigs are made lighter for quicker handling, and clamping with the table is often unnecessary.
Design a milling fixture to cut slot of 33mm in a mild steel component as shown in figure. A jig or fixture has to locate the component such that it cannot move in any of the 6 degrees, this is known a. A free powerpoint ppt presentation displayed as a flash slide show on id. This principle of location of fixing points on the workpiece is also named as 321 principle of fixture design as number of points. Jig and fixture design service highly qualified and experienced team of designers with an advanced level of dexterity with cad design applications. Paul,department of mechanical engineering, iit kharagpur. Overview of jig and fixture jig a jig is a one type of custommade tool. This series of article explains how a designer should go about systematically in designing a work holding fixture.
Contains and most widely used material in jigs and fixtures. Implement the design the final phase of the fixture design process consists of turning the chosen design approach into reality. Documenting fixture and jig designs arena solutions. Design jig that is easy to operate to increase efficiency. Jigs and fixtures for machine shops educational video youtube. Design jig that can be manufactured at the workshop using lowest costs. The shank of the pin is press fitted or driven into the body of jig or fixture. Jigs and fixtures 1 engineering drawing and design sixth edition chapter 26 jigs and fixtures 2 jigs and fixtures machined sections for construction of jigs and fixtures standard parts co. Jig fixture book jig and fixture jig and fixture ppt jig fixture jig and fixture design design of jig and fixture pdf vijay ramnath jig fixture stanchion light fixture closet light fixture 16058a test fixture meter sizing by fixture counts pull chain light fixture the intelligent investor.
Jigs and fixture cannot be used in machining of complex and heavy components. Ppt design of jigs and fixtures powerpoint presentation. Introduction and difference between jig and fixture. This design and fabrication which will enable the operation like drilling, reaming, tapping process easier even the job profile are angular. When you need to make modifications to a component, you can capture change information in these. A jig is a primary purpose is to provide repeatability, accuracy, and interchange ability in the manufacturing products. It is important to foresee all the potential problems and to finally have a part. There are times where the metals are hardened to resist wear and tear.
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. A jig is a workholding device that supports, holds, locates a workpiece and also guides the cutting tool for. The 321 principle of jig fixture design learn the basic. The locating diameter of the pin is made larger than the shank to prevent it from being forced into the jig or fixture body due to the weight of the work piece or cutting forces. Design principles common to jigs and fixtures there are some principles which are useful to design jigs and fixtures. Today our fixturing concept includes several systems, which enable customers to build fixturing with ease never previously experienced. The jig and fixture are tools used for holding the work piece in a correct location for mass production. Oct 22, 2008 lecture series on manufacturing processes ii by prof. Final details are decided, final drawings are made, and the tooling is built and tested.
Ppt jigs and fixtures powerpoint presentation free to. Before entering upon a discussion of the minor details of the design of jigs and fixtures, the fundamental principles of jig and fixture design will be briefly outlined. The fixture is a devise similar to a jig but as the name implies is fixed to the machine bed clamping in such a position that the work is in the correct relationship to the cutter. A jig is defined as the device which holds and positions the workplace, locates or guides the cutting tool related to the workplace and usually is not fixed on the machine table. These fixtures also help in simplifying the network operations which are performed on special equipment. A jig differs from a fixture in that a it guides the tool to its correct position in addition. These are special work holding and tool guiding device. Practical 2d cad drafting tips for making the design drawings are also explained. Literary search on important issues regarding test fixtures propose generic design principles for vibration test fixtures apply design principles and perform finite element analysis on test fixture to validate principles. Designs jig that are foolproof to prevent any misuses by production operator. Except toggle clamp, no other option is available to hold cylindrical object, hence special type of fixture is design for this case, which can be used for machining of hydraulic lift housing, fixture reduces operation time, increases productivity, and best quality of operation is possible. Chip control must be addressed in the design of any jig or fixture. Avoiding redundant location another condition to avoid in workholder design is redundant, or duplicate, location. Quality of the performance of a process largely influenced by the quality of jigs and fixtures used for.
Although many people have their own definitions for a jig or fixture, there is one universal distinction between the two. The pins of various design and made of hardened steel are the most common locating devices used to locate a work piece in a jig or fixture. A jig differs from a fixture in the sense that it guides the tool to its. Our project is mainly composed of design and fabrication of the leaf jig which cover the absolute design to the specified dimensions of the work piece. Design and fabrication of work holding device for a drilling. Jig and fixture design malaysia is the property of its rightful owner. The simplest type of milling fixture is a milling vise mounted on the machine table. How is the 321 location principle used for designing of. Usability the design of the jigs and fixtures should ensure ease of use as well as safe handling and moving the jig or fixture on the machine accuracy it should be consistent firm and quick to accurately locate the blank in the jig or fixture in reference to the tool guiding in the jig or setting elements in fixture.
Design meng 5263 chapter 1 chapter 1 jigs and fixtures. Design principles common to jig and fixture blogger. The main purpose of a jig is to provide repeatability, accuracy, and interchangeability in. Fewer than three points cannot define a plane, and in the real world dimensional tolerances mean that four or more points will not be coplanar. A further difference is that the cutter is not guided into position ready for machining to commence. If so, share your ppt presentation slides online with. A jig differs from a fixture in that a it guides the tool to its correct position in addition to locating and supporting the work piece. It can be defined as the incorporation of design feature in the jig or fixture that will make it. Clearance clearance is provided in the jig or fixture body a to allow for any variation in component sizes specially casting and forging. Design considerations for an assembly jig posted by. A fixture holds and positions the work but does not guide the tool.
Develop design principles for vibration test fixtures validate principles through analysis approach. So, three specific points are used to define the first plane. A device fixed to the worktable of a machine and locates the work in an exact position relative to the cutting tool. The design and need for jigs and fixtures in manufacturing. Namun untuk diameter penggurdian diatas 0,25 inchi, jig biasanya perlu dipasang dengan kencang pada meja. Elements locating devices the pins of various design and made of hardened steel are the most common locating devices used to locate a work piece in a jig or fixture. So jigs and fixtures are used and serve as one of the most important facility of mass production system.