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Positioneering Workbook

Positioneering Workbook
31Pages

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Positioneering Workbook A Guide To Positioners, Turning Rolls, And Manipulators KOIKE ARONSON, INC. / RANSOME P.O. Box 307, Arcade, New York 14009 Phone (585) 492-2400 Fax (585) 457-3517 www.koike.com

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3 Preface What’s This Workbook For: The Positioneering Workbook was conceived to compliment the Handbook of Positioneering for evaluating applications and selecting specific model Positioners. It’s the literature information, specification sheets, informal work sheets, and crib notes used for years in the industry condensed and organized for easy use. Although the Workbook was designed to compliment the Handbook of Positioneering, it’s function as a standalone model applications manual can not be discounted. Who’s This Workbook For: It makes no difference if you’re an expert or a novice, if...

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4 Why Use a Positioner You should use a positioner because welds made in the flat or slightly downhand position are made faster, better, cheaper, 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...

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5 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...

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6 Other Factors to Consider Swing Clearance When selecting a positioner, don’t forget to leave clearance to swing the work above the floor when the table is in the full tilt position. This is a common error in specifying positioners. A rotating weldment obviously will have trouble trying to penetrate a concrete floor. But Koike Aronson has simple solutions for large work pieces. Aronson positioners are available with either manually adjustable bases, or powered Elevating bases which adjust the table height for larger work. Fixed based machines also can be elevated by using a riser or...

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7 Other Factors to Consider Practical Center of Gravity as it Effects Gear Driven Positioners 1. The CG of a weldment is usually near the center of the weldment. 2. The CG of a weldment is exactly in the center of asymmetrical weldment. 3. “A” is a symmetrical weldment: There is no top or bottom, just two ends and two sides of 1” steel plate. Each end is 1x12x12 and weighs 40.8#. Each side is1x12x34, weighs 115.6#. 115.6# x 2, plus 40.8# x 2 equals 312.8#. (Steel weighs approximately .283pounds/cubic inch.) If one end is secured to the table of a Gear Driven Positioner, the CG will be 18”...

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8 Universal Balance Positioner (1) First find the Center of Gravity of Rotation When a work-piece is placed on the worktable of an Aronson Positioner with its center of gravity located on the worktable rotational axis, it will be balanced on that axis. It will, therefore, be very easy to rotate on that axis, even if it is ten times heavier than the operator. In fact, it rotates so easily that a friction band had to be fitted to the worktable of the Positioner to provide a drag effect and to enable the operator to place and stop the work-piece wherever he wants. It is very easy to find the...

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9 SPECIFICATIONS C25 C100 C1000 C2000 C4000 Maximum Load 25 Lbs. 100 Lbs. 1,000 Lbs. 2,000 Lbs. 4,000 Lbs. DIM A, Overhang, 6-1/2” 11” 32” 35” 51-1/2” DIM B, Max. CG Height 3” 4-3/4” 14-1/2” 16” 33-1/2” DIM C, Max. Part Diameter 14” 20” 66” 75” 96” DIM D, Max. Part Length 16” 24” 100” 100” 96” DIM E, Table Diameter 1-1/2” 5” 8” 8” 12” DIM F, Hole Size 10-32 1/4” Slots 17/32” 17/32” 1-1/32” DIM G, Bolt Circle 1-1/4” 4 Slots 5” 5” 8” DIM H, Table Thickness 1/4” 1/4” 15/16” 1” 1-1/2” DIM I, Pilot Hole 10-32 1/4-20 1/2-13 3/4-10 1”-8 x 1.25 DIM J, Height Range 6-1/4” Fix 5” Fix 27”- 37” 30”-...

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10 Special Utility B1/B3 Positioners Keep little things from becoming big problems. Scale down everything and put it on a work bench. That will give you some idea of what we have for bench welding light duty machining, inspection, wiring and assembly. Or mount it on casters and roll it around. If it’s in the 50 to 500 lb. capacity range, we have a model for the application. Some of our models are no more complicated than a rotating vise. Others may be small, but very sophisticated. Take one of our bench-mounted, powered positioners for example. It has rotation, tilt, drive, and an enclosed...

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11 Work Sheet - Special Utility, B1/B3 1. TOTAL LOAD WEIGHT ______________ Lbs. (Including Fixture) 2. PIECE PART DIMENSIONS: LENGTH________________________________________Inches WIDTH____________________ _____________________Inches HEIGHT________________________________________ Inches (Above Table) MAXIMUM SWING CLERANCE/RADIUS _____________ Inches 3. OVERHANG C/G___________________________________Inches (Distance the center of gravity of the load is from the surface of the table) 4. OFF-CENTER C/G_________________________________Inches (Distance the center of gravity of the load is from...

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12 HOW TO SELECT AGEAR DRIVEN POSITIONER TO BEST MEET YOUR NEEDS The illustration below shows a typical capacity plate that we attach to each Aronson Gear Driven Positioner. This happens to be the capacity plate for a Model HD400 Aronson Gear Driven unit. An HD400 is designed to handle loads up to 40,000 lbs (18,140kg) with a CG at a distance from the surface of the table of 12” (300mm). All the information required for loading the positioner is either on the capacity plate, or it can be simply calculated from the data on the plate. Tilt Torque Load: To find your weldments’ Tilt Torque...

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