Tools fixtures

Menu Search Compare. Search: Search. You have no items to compare. Magento Commerce. Mix Without A Stir Bar. Sort By. Liquid Handler Compatibility Please Select Format Please Select These tenons enter a T-slot of the table to provide the required location. The fixture base can then be secured to the table by means of T-bolts and nuts.

These fixtures are used on different types of broaching machines to locate, hold, and support the workpieces during the operations, such as keyway broaching operations, such as keyway broaching, hole broaching, etc. The use of a clamping plate as a fixture for internal pull-type hole broaching. Several different forms of fixtures are used in grinding machines to locate, hold , and support the workpieces during the operations.

These fixtures may be the standard work-holding devices, such as chucks, mandrels, chuck with shaped jaws, magnetic chucks, etc. For example; a vertical surface grinder with a rotary table will normally have a rotary fixture secured to its table. Similarly, a plain or string fixture may be provided on a surface grinder with the reciprocating table.

A drill grinding attachment is a glaring example of a standard fixture used for grinding of drill geometry. Whatever be the types of fixture designed for grinding operation, it should have provisions for supply and exit of coolant, mounting of wheel dressers and should be properly balanced, if it is a rotating fixture. One of these incorporates the principle of a drilling jig, and in this, the boring bar tool is guided through a pilot bush.

Although this fixture incorporates almost all the common principles of jig and fixture design, their construction need not be as sturdy as that of the milling fixtures, because they never have to bear as heavy cutting loads as involved in milling fixtures, because they never have to bear as heavy cutting loads as involved in milling operations.

Several components need machining on the different surface such that their machined surface surfaces or forms are evenly spaced. Such components are required to be indexed equally as many as the number of surfaces to be machined.

Obviously, the holding devices jigs or fixtures used are made to carry a suitable indexing mechanism. A fixture carrying such a device is known as an indexing fixture. Tapping fixture is specially designed to position and firmly secure identical workpieces for cutting internal threads in drilled holes in them. Odd shaped and unbalanced components will always need the use of such fixtures, especially when the tapping operation is to be carried out repeatedly on a mass scale on such components.

It is the name given to the fixture which holds two similar components simultaneously and facilitates simultaneously machining of these components at two separate stations. While one workpiece is machined at one station. Both the operations according to the requirement may be similar or different. Once machining at both the stations is over, the fixture is indexed through degrees so that the first component is shifted to the second station for the second operation and the finished component to the first station.

The finished component is then uploaded here, replaced by a fresh component and the first operation performed on it. The cycle goes on repeating, which enables mass production of components at a fairly high speed. Welding fixtures are carefully designed to hold and support the various components to be welded in proper locations and prevent distortions in welded structures.

For this, the locating element need to be careful, clamping has to be light but firm, placement of clamping elements has to be clear of the welding area.

The fixture has to be quite stable and rigid to withstand the welding stresses. In many cases, a preferably and commonly used practice is to first tack weld the structure by holding it in welding jig and then transfer it to a holding fixture for full welding. This helps in reducing the chances of distortion considerably and the fixture is subjected to lesser stresses. The function of these fixtures is to hold different components together in their proper relative position at the time of assembling them.

For example, two or more steel plates can be held together in relative positions and riveted. These fixtures, which are used for holding the components for performing mechanical operations, are known as mechanical assembly fixtures.

Against this, there are other types of fixtures which the components are held for joining, such as the welding fixtures are also assembly fixtures, but for hot joining. The following are the advantages of jigs and fixtures in mass production work.

So now, we hope that we have clear all your doubts about Jigs and Fixtures. We have also a Facebook community for you guys. If you want, you can join our community, here is the link to our Facebook group.

If you like our article then please share it with your friends. If you have any questions about any topic you can ask in the comment section. Email Address. Download PDF. Saif M. He completed his engineering studies in and is currently working in a large firm as Mechanical Engineer. He is also an author and editor at www. Notify me of follow-up comments by email. Notify me of new posts by email.

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