TFB-121 Brochure Version2
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re you looking for the latest techniques on tube A & pipe bending? Ask for our FREE Tube and Pipe Bending manual shown here. It answers a lot of questions about bending, with tips and techniques to make better bends and make your work easier and more productive. You can also order our FREE Rotary Draw Bending Guide wall chart. Manual tube bender for prototype or low production. Produces tight radius bends in thin wall tubes with minimal collapse. Look at what TFB can do for you! Since 1965, tube bending companies from around the world have looked to TFB for bending solutions. And for very good reasons! They know that: • TFB designs and manufactures (in-house) high-degree-of- difficulty bending tools. • TFB tooling will perform to exacting specifications. • TFB quality and expertise ensure longer tool life. • TFB can provide tooling for any brand or size of bender. • TFB can provide tooling for any size or shape (from 1/8" (3.175 mm) to 12-3/4" (323.85 mm) round, square, rec- tangular, or extrusion). • TFB promises honest delivery dates, not "wish-for" dates. If you’re using our tooling, thanks for your trust. If not, Figure 1-1. TFB President Eric Stange inspects large rec- tangular mandrel. please don't let this become a habit. You can rely on TFB's four decades of experience to provide you with the correct: • mandrels - close-pitch or regular • wiper dies - square-back or tips • clamp and pressure dies - carbide sprayed or serrated • our patented Empty-Bending® tools • squaring and deburring blades - carbide or TL-17 • end-forming tools - standard or special • Kro-Lon®, TFB’s proprietary surface treatment For details, look through the following pages. Then call us to discuss your next project or any bending problems you are experiencing with your present tools. We don’t create bending problems, we solve them! Figure 1-2. Five-piece, reverse interlocking tool set (2.00” O.D. x 0.022” wall on 2.00” C.L.R.) for aerospace tube fabrication. 1 TFB Mandrels Tube bending has come a long way since wet-packed sand cerrobend or cable man- REGULAR (RP): Universal drels. TFB has more than four dozen chrome and Ampro bronze mandrels ready- Flexing for standard tube & pipe to-ship, in the most common sizes from 3/8" (9.525 mm) to 3" (76.2 mm). In addition to the basic mandrels, TFB has designed many specialty hybrid man- CLOSE PITCH (CP): drels, used for hydroforming, wave guide, tube-within-a-tube, bend-on-a-bend, siz- Universal Flexing for thinwall tubes ing, bullet-nosed, expanding, plastic, sheathed, brute, and ultra-close pitch. Ultra-Close Pitch (UCP): Mandrel Selection Universal Flexing for very thinwall tubes There are six common types of mandrels, as shown in Figure 2-1. There are many factors that influence which type to use. The most important considerations include: • “D” of Bend (center line radius/tube O.D.) (see Figure 2-2) BRUTE: Single Plane Flexing for large diameter tubes & pipe • Wall Factor (tube O.D./wall) (see Figure 2-2) • Ovality and wall thinning requirements • Tube material • Cosmetic considerations FORMED END: For standard tube & pipe • Size and location of weld flash TFB can provide the correct mandrels for any conceivable requirement. The chart on Page 3 shows a wide range of choices. PLUG: For heavy wall tube Figure 2-1. Types of Mandrels We furnish the “H” style universal flexing, link mandrels. Our single-plane “Brute” mandrel has superior strength and straight ball alignment, ideal for high produc- tion or larger tubes. Wall Factor Mandrels are available for virtually any size of tube or pipe, as well as any square, O.D. ÷ Wall = W.F. rectangular, or extruded shape. All mandrels are available in standard pitch, close pitch, or the ultra-close pitch for extremely thin tubes. "D" of Bend Mandrel materials are Ampco bronze or tool steel. Steel mandrels can be plated with C.L.R. = "D" of hard-chrome, Kro-Lon®, or titanium nitride. How a tube reacts to bending is shown Tubeube O.D. Bend C.L.R. in Figure 2-3. Outer Wall Outer Wall Outer Wall Springback O.D. Thin Out Thin Out Thin Out Figure 2-2. Bending Design Factors Inner Wall Inner Wall Inner Wall Build Up Build Up Build Up Tangent Lines Tangent Lines Tangent Lines 1 2 8 Radial Growth Outer Wall 7 3 Neutral Axis Neutral Axis Inner Wall Neutral Axis Clamp End 6 4 Clamp End Clamp End 5 Neutral Axis (Clamp Die End) Figure 2-3. Reaction of the tube to bending 2 Tooling Selection Guide “D” of Bend = centerline radius tube outside diameter (2.0 C.L.R. ÷ 1.0" O.D. = 2 x D) “D” of bend 1 x D 1.50 x D 2 x D 2.50 x D 3 x D 3.5 x D Degree of bend 90° 180° 90° 180° 90° 180° 90° 180° 90° 180° 90° 180° 10 Ferrous P P P P Non-Ferrous P P P P P P * 20 Ferrous RP-1 RP-1 RP-1 RP-1 RP-1 RP-1 P P Non-Ferrous RP-1 RP-2 RP-2 RP-2 RP-2 RP-2 RP-1 RP-1 P P 30 Ferrous RP-2 RP-2 RP-2 RP-2 RP-2 RP-2 RP-1 RP-1 P P Non-Ferrous RP-3 RP-3 RP-3 RP-3 RP-3 RP-3 RP-2 RP-2 RP-1 RP-1 P P 40 Ferrous RP-3 RP-3 RP-3 RP-3 RP-2 RP-2 RP-2 RP-2 RP-1 RP-1 P P Non-Ferrous CP-4 CP-4 CP-4 CP-4 RP-3 RP-3 RP-3 RP-3 RP-3 RP-3 RP-2 RP-2 50 Ferrous CP-4 CP-4 CP-3 CP-3 RP-3 RP-3 RP-2 RP-2 RP-2 RP-2 P P Non-Ferrous CP-4 CP-4 CP-4 CP-4 CP-4 CP-4 RP-3 RP-3 RP-3 RP-3 RP-2 RP-2 (2.0" O.D. ÷ F.) .032 = 62.5 W. 60 Ferrous CP-4 CP-4 CP-4 CP-4 CP-4 CP-4 RP-3 RP-3 RP-3 RP-3 RP-1 RP-1 Non-Ferrous CP-5 CP-5 CP-4 CP-4 CP-4 CP-4 CP-4 CP-4 RP-3 RP-3 RP-1 RP-1 70 Ferrous CP-5 CP-6 CP-5 CP-6 CP-4 CP-5 CP-4 CP-4 RP-3 RP-4 RP-1 RP-1 Non-Ferrous UCP-6 UCP-6 UCP-6 UCP-6 CP-4 CP-4 CP-4 CP-4 CP-4 CP-4 RP-2 RP-2 80 Ferrous CP-5 CP-5 CP-5 CP-6 CP-4 CP-4 CP-4 CP-4 RP-3 RP-3 RP-1 RP-1 Non-Ferrous UCP-6 UCP-8 UCP-6 UCP-8 UCP-5 UCP-6 CP-4 CP-5 CP-4 CP-4 RP-3 RP-3 90 Ferrous UCP-6 UCP-8 UCP-5 UCP-5 CP-4 CP-4 CP-4 CP-4 CP-4 CP-4 RP-3 RP-3 Non-Ferrous UCP-8 UCP-10 UCP-8 UCP-10 UCP-6 UCP-6 UCP-6 UCP-6 CP-4 CP-4 RP-3 RP-3 wall of tube 100 Ferrous UCP-6 UCP-8 UCP-6 UCP-6 UCP-5 UCP-5 UCP-5 UCP-5 UCP-5 UCP-5 CP-4 CP-4 Non-Ferrous UCP-8 UCP-8 UCP-8 UCP-8 UCP-8 UCP-8 UCP-6 UCP-6 UCP-5 UCP-5 CP-5 CP-5 125 Ferrous UCP-6 UCP-6 UCP-6 UCP-6 UCP-5 UCP-5 UCP-5 UCP-5 CP-4 CP-4 Non-Ferrous UCP-6 UCP-6 UCP-6 UCP-6 UCP-6 UCP-6 CP-4 CP-4 150 Ferrous CAUTION: UCP-8 UCP-8 UCP-6 UCP-6 UCP-6 UCP-6 CP-5 CP-5 Non-Ferrous UCP-8 UCP-8 UCP-6 UCP-6 UCP-6 UCP-6 175 Ferrous BETTER CALL: UCP-6 UCP-6 UCP-6 UCP-6 CP-6 CP-6 Wall Factor =Wall tube outside diameter Non-Ferrous UCP-8 UCP-8 UCP-8 UCP-8 200 Ferrous TOOLS FOR BENDING, INC. UCP-6 UCP-6 CP-6 CP-6 Non-Ferrous KEY P-Plug or Empty-Bending NOTE: 1. The Empty-Bending system (without a mandrel or wiper die) RP-Regular Pitch is recommended for applications above the dotted line. CP-Close Pitch 2. A wiper die is recommended for applications below the dotted line. UCP-Ultra Close Pitch 3. “H” style, brute, chain link mandrel in regular pitch, close No. indicates suggested number of balls pitch, and ultra-close pitch. 4. All mandrels are available with lube holes and grooves and finished in chrome, Kro-Lon AMPCO bronze. 3 TFB Wiper Dies It's not the price of the wiper die itself that makes it costly or inexpensive. It's how the wiper die performs. A precisely machined TFB wiper die, one that can be positioned quickly and is properly supported by the bend die, will produce good Figure 4-1. With moderate thumb nail pressure, the wiper’s leading edge must deflect evenly all around, bends, have a longer tool life, often 0.005” to 0.010” (0.13 mm to 0.26 mm). and will be the most cost effi- cient.