Tilt/Turn Welding Positioners

 

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Gear Driven Positioners

This type of positioner provides powered rotation of a work-piece, and in addition gives powered gear driven control of the table tilt. The table can be tilted from horizontal, through vertical to 45 degrees past the vertical. This type is often called a “Flat - 135 degree” Positioner. Powered table rotation is variable speed to permit making circumferential welds at any desired speeds. Gear driven positioners are offered from 1,000 lbs. to 1,000,000 lbs. capacity. Various accessories extend the versatility of these units.

Our positioners enable better weld seam accessibility creating increased deposition rates. Even less experienced weld operators can safely manipulate our units while concentrating on welding functions. The design takes up minimal floor space and allows unrestricted movement throughout the work area. Many safety features have been incorporated into the structural, mechanical and electrical components of these positioners to ensure safe, productive operation. A large selection of optional equipment includes: back-lash control, variable speed tilt, and optional tables.

Why Use a Positioner?

You should use a positioner because welds made in the flat or slightly downhand position are made faster, better, less expensive, and in many cases safer than out-of-position welds. Without the use of a positioner, welds made in the vertical or overhead position are commonly deposited at the relatively low rate of as little as 3 pounds per hour. When properly positioned deposition rates can easily exceed 10 pounds per hour, depending of course on the thickness and mass of the parts being welded. The use of automatic process equipment can eliminate the need for the operator to hold the arc further increasing productivity. Positioned welds look better and quality is more easily controlled requiring less operator skill and producing less fatigue. Of course, it is possible to make positioned welds without using a positioner. Small weldments can be clamped in a vise, large ones moved with a crane. But these simplified methods seldom allow the ideal position to be attained, and are much more time consuming and hazardous to employ. Probably the first step toward the production of low cost, efficient welded products lies in the design of the weldment. But the second step (even ahead of welding process selection) is USE A POSITIONER. Put your self (and your weldment) in a good position for increased profits.

How do I select the right positioner for my job?

How do I select the right positioner for my job? Selection of the type of positioners depends upon the size and shape of the work-piece. The descriptions and specifications in this brochure, will assist in making this selection. Selection of the size or rating of the positioner depends upon the weight of the work-piece and also on the location of its center-of-gravity. If a work-piece is mounted on a gear driven positioner, directly over the rotation axis, the weight will act straight down and will exert no torque load on the tilt gearing, like this:

 

 

 

 

 

 

 

 

As the positioner is tilted, the weight of the work-piece exerts a turning moment around the tilt axis, like this:

 

 

 

 

 

 

If the work-piece is mounted with its CG off the rotation axis, and the table is other than horizontal, the rotation drive will have to exert a torque in order to lift the CG as the table rotates, like this:

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