Types of clamps in jig and fixture pdf

International journal of engineering research and general science volume 2, issue 2, febmar 2014. Pdf present situation in the industrial manufacture has brought new trends in the kind of flexibility and intelligence. 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. Screw clamps are threaded parts with knurled collar, hand knob, tommy bar or spanner flats for rotating and tightening the screw. This article will explain about the places where the jigs are used and where the fixtures are used. Pivoted clamps clamps are often pivoted at the centre to simplify their operation. Sometimes, to prevent damage to workpieces, they are made from nylonfibre. A fixture holds and positions the work but does not guide the tool. Once workpiece is located, it is necessary to press it against locating surfaces and hold it there against the force acting upon it.

Unlike standard vises, fixture clamps do not have a leadscrew for adjustment instead using exchangeable, machinable clamping jaws that must be customsized for the workpiece. A few fundamental forms of jigs will be shown to illustrate the design and application of jigs. Name the various operations that can be performed using jig and fixture. 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. A jig differs from a fixture in the sense that it guides the tool to its. Tahoma wingdings arial narrow arial dawns latest slide 1 definitions what are jigs and fixtures two main types of jigs. Hold small parts securely, safely, and deadsquare to the blade for clean and superaccurate cuts on your tablesaw. A plate 2 having holes at the desired positions serves as a which is fixed on.

May 04, 20 different types of clamps different variety of clamps used with jigs and fixtures are classified into different categories are discussed here. Aug 10, 2015 this episode will take a look at the main types of locating pins, head shapes, and the primary uses for each one. Welcome to the premier industrial source for clamps. An example of a jig is when a key is duplicated, the original is used as a jig so the new key can have the same path as the old one. Nothing beats the elegant simplicity of the box joint. The screw clamp, illustrated in image below, is used to grip the work on its edges. This type clamping is done with the help of a lever pressure acting as a strap on the workpiece. Jigs and fixtures are essential to working holding and tool holding devices in industries.

This episode will take a look at the main types of locating pins, head shapes, and the primary uses for each one. Onetouch clamping fixture clamping devices fixtureworks. Toggle clamps are provided with clamping screws to accommodate workpiece variations. From simple template and platetype jigs to complex channel and boxtype tooling, this newly revised edition features more than 500 illustrations of tools and.

Manual clamping fixture manual fixture manufacturer. Determination of locating method and positioning other fixture elements are an integral part of the system. It is used in cases where heavy clamping pressure is not required. Contains and most widely used material in jigs and fixtures. The outside pin locator, illustrated in image below, is used to locate a work having odd, irregular profiles. Routinely used in machining, welding, and manualrobotic assembly. They are special purpose tools used for large scale production by semi skilled operator. This jig uses precisionmachined solid brass indexing keys to. By emphasizing similarities among types and styles, jig and fixture design, 5e speeds readers to a complete understanding of the whys and hows of designing and building a variety of different workholders for manufacturing. The difference between jigs and fixtures proto labs.

This is the most popular clamping device used in workshops, and tool rooms of jigs and fixtures. While the two terms are often used interchangeably in manufacturing facilities, there are differences which determine whether an item is a jig or a fixture. Clamps jig plate with bushes jig body other elements as required supports jig feet february 12, 2008 nageswara rao posinasetti 29 types of jigs template jigs plate jigs universal jigs leaf jigs channel and. The companies featured in the following listing offer a comprehensive range of clamps. Whereas the jigs are made lighter for quicker handling, and clamping with the table is often unnecessary. Toggle clamp the pushertype toggle clamp withdraws backwards during unclamping. The main difference between the jig and fixture is given in. Drill jig terms drill jig terms drill jig components drill. Different types of clamps different variety of clamps used with jigs and fixtures are classified into different categories are discussed here. The angleplate fixture is a variation of the plate fixture figure 218. A wide variety of clamps jigs fixtures options are available to you, such as power. Strap clamps reach over a workpiece to hold it in place, and are often used when extra toughness is required. Approximate clamping forces of differentsize manual clamp straps with a 2to1 clampingforce ratio.

Total guide to cnc jigs, fixtures, and workholding. Introduction jig and fixture are production work holding devices used to manufacture duplicate parts accurately. Principles of clamping different types of clamping devices, their. Different type of clampsjigs and fixtures msmeblogs.

The purpose of the jigs is to provide strength, holding, accuracy and interchangeability in the manufacturing of product. Main parts of jig and fixture jig and fixture design i. Onetouch clamps offer an easy and efficient way of clamping and unclamping of the workpiece without the need for tools. Clamping depends on i type of work piece ii clamping action 4 the basic. Design of jigs, fixtures, press tools and moulds unit 1. A jigs primary purpose is to provide repeatability, accuracy, and interchangeability in the manufacturing of products. The shank of the pin is press fitted or driven into the body of jig or fixture. Jig bush jig bushes locate and guide cutting tools several types like linear,renewable,slip and screw bushes exist made from direct hardening type steel such as en31,t90,20mnv8 hardness is usually 60 hrc with case hardened depth of 0. Onetouch clamps by fixtureworks are available in various types. Tool designer should choose the clamp which is simpler and easiest to use and most efficient.

They can also be used for small scale production when interchangeability is important by skilled machinist when the. Types of clamps generally used in jigs and fixtures are as follows. Mfg tooling 07 jig design university of northern iowa. Jig and fixtures are made from a variety of the materials. Once located, the workpiece must also be held to prevent movement during the operational cycle. Diffe rent types of strap clamps are disc ussed below. Manufacturer of manual clamping fixture manual fixture, cnc manual clamping fixture, manual clamping fixture and cnc manual clamping fixture offered by tan tools and gauges, chennai, tamil nadu. Checking fixturegauge standard this gauge standard has been developed by abc group to document best practices and lessons learned and convert them into a standard for the design and building of checking gauges. These clamps allow the user to quickly grip the project or item using just one hand. Jig a jig is a special class of fixture, which in addition to provide all the functions as above, also guides the cutting tool. Fixtures are colloquially workholding solutions that are custom made for a particular part or situation. Different variety of clamps used with jigs and fixtures are classified into different categories are discussed here. The form to be used depends on the shape and requirement of the workpiece to be machined.

Also, a sufficient number of clamps of various types and sizes are in demand to replace a reliable extra pair of hands during the manufacturing of parts and the assembly process. The major difference between the various types of workholders, from permanent, to flexible, to modular and generalpurpose workholders is the costbenefit relationship between the workholder. An adjustable fixture is one which is used in lathe where different cutting tools could be accommodated in one set up, to turn work pieces of different shape and length. These devices facilitate clamping of the workpiece on the machine tool in correct relationship with the cutting tool jigs and fixtures are often used in interchangeably and sometimes in pairs, but there is a difference between two terms jigs and fixtures. Pdf present situation in the industrial manufacture has brought new trends in the kind of. This type of clamping arrangement enables the top surface of the work to be machined without any difficulty. In order to locate the locators locating surface should be identified. Types of jigs and fixtures the type of jig and fixture totally depends on the type of work to be machined and its quality required. Jigs and fixtures applications and difference between jigs. Whereas a jig holds, locates and as well as guides the tool. A few fundamental forms of jigs will be shown to illustrate the design and application.

Jigs the two types of jigs that are in general use are 1 clamp jig and 2 box jig. They offer adjustable pressure, making them ideal for a number of applications. Different types of strap clamps are discussed below. It is made to rest on several points on the jig body. A device that does both functions holding the work and guiding a tool is called a jig. With this tool, the part is normally machined at a right angle to its locator. Feb 23, 2012 clamp selection is determined by the operation that the jig or fixture will perform. Wds offers an extensive range of clamps and fixturing clamping equipment. The nest of a jig or fixture should be a pocket or cavity into which the workpiece. Purposes of jigs and fixtures and their design principles nptel. Pdf tool design3607 locating clamping jigs completed kp.

Fixtures are used to securely locate position in a specific location or orientation and support the work, ensuring that all parts produced using the fixture will maintain conformity and interchangeability. We will now study the various types of clamps and methods of clamping. 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. The design and need for jigs and fixtures in manufacturing. Rather than guiding a manufacturing tool, fixtures hold a workpiece in a secure position, orientation, or location. A prime example, and one were familiar with at protolabs, is the fixture in which a block of raw material is clamped into inside a cnc machine. February 12, 2008 nageswara rao posinasetti 3 jig a jig is a special class of. The primary devices used for holding a workpiece are clamps. Its important to note that since the jaws do not close squarely to each other, t these types of clamps are best suited for thinner materials or pieces as they will not do as good. Locating the workpiece is the first basic function of a jig or fixture. If the jig or fixture is to maintain desired repeatability, the workholder must be. Held fixture designing a plate fixtures cam clamps analysis and calculations overview of tool design application overview of cam design application the design of plate jigs overview of plate jigs designing a plate jig designing a table jig designing a sandwich jig or a leaf jig overview of tool design application in plate jigs. Fixtures should be such that the process, loading, clamping and unloading time of the. Strap clamps based upon the lever principles to amplify the.

But first, lets talk about why jigs and fixtures are important and how to know when you need to make a special jig or fixture. Design and development of jig for an auto part kataria mahendra b. A jig or fixture can be designed for a particular job. Jigs are usually fitted with hardened steel bushings for guiding or other cutting tools. Methods of locating and clamping of jig and fixtures axibook. Jig body the jig body supports the work piece and has locating and clamping elements in it. Jigs and fixtures for machine shops educational video youtube.

Tool design is the process of designing and developing the tools, methods, and techniques necessary to improve manufacturing efficiency and productivity. A fixture is a workholding or support device used in the manufacturing industry. Machining fixture clamps are extremely compact, highprecision power vises designed to be incorporated into workholding fixtures. Clamping is to hold the work in position inside the jig fixture body so that there is no work movement during maching 12. Swinging strap clamp this is a combination of strap clamp and swinging clamp. Clamp types include pull, swing, retractable, side, push, snap and thrust. There are times where the metals are hardened to resist wear and tear.

Anytime you need to hold two large workpieces at a right angle, say while youre screwing or gluing them together, you. The exercise permitted the use of both jig and fixture and thus it is unique. Rightangle brace gives you a corner on clamping tasks. Unlike standard vises, fixture clamps do not have a leadscrew for adjustment instead using exchangeable, machinable clamping jaws that must be. Quick turn screw thumb screw it is used to clamp hinged jig plates and latches within a quarter turn. Index termsjig and fixture, holding devices, drilling machine.

Swing clamp has a screw clamp with swinging arm that pivots on its mounting stud. The process of holding the position of the workpiece in the jig or fixture is called clamping. February 26, 2008 3 fixtures in addition to the function of holding the. Fixture components clamps clamps counteract forces from the feed of the table and rotation of the cutter.

Fixture clamps product types miteebite products llc. The design and need for jigs and fixtures in manufacturing increase the rate of manufacturing. Device should be incorporated into the fixture, proper clamp in a fixture directly influence the accuracy and quality of the work done and production cycle time. The pins or the buttons are arranged on the jig body, following a contour corresponding to the outside profile of the work. The wds range of clamping tools, hand clamps and quick clamping tool accessories are available from stock for fast delivery. So jigs and fixtures are used and serve as one of the most important facility of mass production. International journal of engineering research and general. The sizes of woodworking clamps typically range from 1. New generation of clamping fixtures is represented by group of clamping fixtures which can be used in. Clamp selection is determined by the operation that the jig or fixture will perform. Fixture it is a device which only, holds and locates a workpiece during an inspection or for a manufacturing operation.

Main parts of jig and fixture jig and fixture design. There are two classifications of locating pins, 2way and 4way. Design of jigs, fixtures and press tools mechanical. Provide a rest to workpiece on three points on the. Box joints are strong and attractive, and with the help of our router table box joint jig, theyre also straightforward to make. The cam clamp, illustrated in image below, is extensively used in jigs and fixtures work due to its rapid and convenient action. Design and fabrication of work holding device for a drilling machine. Often the word jig and fixture are used in place of each other. Also, you will come to know the differences between the jigs and the fixtures. Jig design nageswara rao posinasetti february 12, 2008 nageswara rao posinasetti 2 fixture 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.

With the use of locators and proper clamps, handling of those jobs will be made easy in fixtures than any other standard work holding devices. The tool designer refers to this action as clamping and the mechanisms used for this action are known as clamps. New generation of clamping fixtures is represented by group of clamping fixtures. Jig is device which is used to hold the work piece or fix the work piece and guide the cutting tool.

The pivoted clamp is illustrated in image below eliminates the use of spanner for clamping purposes. The fixtures are heavier in construction and are bolted rigidly on the machine table. Jig, clamp and fixture plans in order to make use of your carpentry tools and machines to the fullest, in your workshop you need some jigs and fixtures. The objective of this project is to design and development of drill jig.

Given cnc, theres little need for jigs as the gcode guides the cutter, so the term is largely related to manual machining. In simple terms, a jig is a tool that guides the cutting or machining tool. While unit 2 types and functions of jigs and fixtures figure 211 channel jig. About 12% of these are machining, 0% are moulds, and 0% are other machine tools accessories. Using a fixture improves the economy of production by. The mostcommon type of concentric location is a locating pin placed in a hole. There are different types of clamps which help in clamping of the jig at the required position. The most common type of jig is the drill jig, which guides the drill bit. The two types of jigs that are in general use are 1 clamp jig and 2 box jig. Jigs and fixtures are production tools used to produce duplicate manufactured parts with consistent quality. Total guide to cnc jigs, fixtures, and workholding solutions.