A welding jig is a device designed to allow something being welded to be held such that the intended shape is made and can be repeatedly made using the jig. That way each unit coming out of the jig has the same dimensions.
A jig holds the work and guides the tool.A fixture only holds the work.In case of weld fixture holding work helps in welding or tool movement automatically there by its also called a weld jig
· Plate jigs or channel jigs · Angle plate jig · Box jig · Leaf or latch jig · Sandwich jig · Trunnion jig · Template jig · Universal jig
Both hold the workpiece. But a jig guides the cutting tool whereas a fixture does not.1. SizeJigs are normally very light in size and they are not fixed onto the machine table. This is because it has to move around guiding the cutting tool unlike the fixture that is clamped onto the table. Furthermore, the fixture is quite bulky in construction and it helps hold the work in position. The other reason why the fixture is fasted onto the table is to ensure that the work piece does not move when the machine starts operating.2. ApplicationFixtures boast of a wider application range as compared to jigs. In fact, fixtures are made for applications wherein the cutting machines cannot be easily guide like a drill. When using these work holders, a center finder, gauge blocks or edge finder positions the cutter. Some of the examples of common fixtures include lathe fixtures, milling fixtures, grinding fixtures and sawing fixtures. Furthermore, fixtures can be utilized in any machine operation that demands an exact relationship between a tools' position to a work piece.3. AccuracyAnother key distinction between a jig and a fixture lies in accuracy. Here, a jig is more accurate than a fixture. In fact, jigs are typically used so as to ascertain the high precision of parts during production. This action helps control the quality control costs.To sum up, jigs and fixtures help to save labor and even less skilled workforce can effectively work complex machines through their assistance.
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A butt weld is a weld made between two straight cut profiles , a socket , or plug weld is made between a surface and a hole.
When done correctly it doesn't matter where a weld is made.
Jig will guide the tool toward the work piece but donot hold the work piece. Jig will be placed on the work piece. Whereas the fixture holds the work piece and work piece is clamped to the fixture.
Its not practical because the welding jig is used to hold the materials in place under stress and heat. When testing that the product is assempled correctly it is always better to use a test jig that way you make sure that when the item is removed from the welding jig it will fit in to a jig that represents it final fitting area. If the weld jig is or goes wrong you wont find out until the customer comes back to tell you and then its a very costly job correcting and keeping the customer happy
Industrial Jig & Fixture specializes in this type of thing. I have added a link below, where you can view capacity information and more.
Jig-a-Jig was created in 1970-05.
Jig-a-Jig - EP - was created in 2006.
· Plate jigs or channel jigs · Angle plate jig · Box jig · Leaf or latch jig · Sandwich jig · Trunnion jig · Template jig · Universal jig
Shakespeare. by:rougebankgirl
a crown
can weld aluminium with a mig or tig welder
Metal expands as it is heated and contracts as it cools. Keeping the heat input even, completely around the pipe, will help. If possible reheating the weld area after the weld is complete can help to "stress relieve" the joint. Using a weld "fixture" to prevent bending is another possibility.
a machine jig you divvy
JIG