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 A126 Earpiece Speaker Clamp Metal Bracket iPhone 3G 3GS $2.29 End Date: Thursday Jun-14-2012 10:04:33 PDT Buy It Now for only: $2.29 Buy It Now | Add to watch list |
 Internal Metal Earpiece Clamp For iPhone 3G 3GS Repair $2.42 End Date: Saturday May-26-2012 20:26:17 PDT Buy It Now for only: $2.42 Buy It Now | Add to watch list |
 Metal Clamp for Tecan lab equimpment medical pipetting liquid handling warranty $2.50 End Date: Friday Jun-1-2012 15:04:31 PDT Buy It Now for only: $2.50 Buy It Now | Add to watch list |
 A126 Earpiece Speaker Clamp Metal Bracket iPhone 3G 3GS $3.29 End Date: Tuesday Jun-5-2012 7:52:07 PDT Buy It Now for only: $3.29 Buy It Now | Add to watch list |
 NTE NTE1V130 Metal Oxide Varistor 135V RMS 355V Clamp $1.45 End Date: Monday Jun-11-2012 12:56:56 PDT Buy It Now for only: $1.45 Buy It Now | Add to watch list |
 6 METAL SPRING CLAMP TAIC0377 $1.39 End Date: Wednesday Jun-13-2012 14:49:38 PDT Buy It Now for only: $1.39 Buy It Now | Add to watch list |
 NEW ROBIN METAL FUEL LINE CLAMP 3114 LK OEM $1.79 End Date: Friday Jun-15-2012 19:59:14 PDT Buy It Now for only: $1.79 Buy It Now | Add to watch list |
 CLAMP MUFFLER EXHAUST BLACK METAL 137 LAWN MOWER NEW $3.75 End Date: Friday May-25-2012 14:24:11 PDT Buy It Now for only: $3.75 Buy It Now | Add to watch list |
 C clamp G clamp 1 inch heavy duty metal woodworks carpenter handyman vise grip $1.99 End Date: Thursday Jun-14-2012 20:18:15 PDT Buy It Now for only: $1.99 Buy It Now | Add to watch list |
 iphone 3G proximity sensor cable metal bracket clamp US $3.99 End Date: Thursday Jun-7-2012 18:31:45 PDT Buy It Now for only: $3.99 Buy It Now | Add to watch list |
 XBox 360 Metal X Clamps Lot of 2 $4.00 End Date: Friday May-25-2012 0:42:11 PDT Buy It Now for only: $4.00 Buy It Now | Add to watch list |
 4 Metal Spring Clamps 2 Pc NEW $4.00 End Date: Wednesday Jun-13-2012 14:29:38 PDT Buy It Now for only: $4.00 Buy It Now | Add to watch list |
 Vintage Rhinestone Hinged Clamp Bracelet Metal Stretch Bracelet Lot $1.29 (2 Bids) End Date: Thursday May-24-2012 19:11:23 PDT |
 Dollhouse Miniature Unfinished Metal Furniture Clamp $1.59 End Date: Thursday Jun-7-2012 2:15:37 PDT Buy It Now for only: $1.59 Buy It Now | Add to watch list |
 Metal Spring Clamps Pony Type 4 Set of 2 $1.39 End Date: Tuesday Jun-5-2012 13:47:51 PDT Buy It Now for only: $1.39 Buy It Now | Add to watch list |
 12 Piece Metal Spring Clamps Set of 12 and 1 inch $4.62 End Date: Sunday May-27-2012 14:49:40 PDT Buy It Now for only: $4.62 Buy It Now | Add to watch list |
 12pc 2 Long 1 Jaw Metal Spring Clamps Set SHIPS FROM USA $4.64 End Date: Wednesday May-23-2012 14:19:37 PDT Buy It Now for only: $4.64 Buy It Now | Add to watch list |
 New 12pc 1 Mini Metal Spring Clamps Useful Hand Tools $4.64 End Date: Saturday May-26-2012 12:14:19 PDT Buy It Now for only: $4.64 Buy It Now | Add to watch list |
 12pc 1 Metal Spring Clamps Set $4.65 End Date: Tuesday May-29-2012 19:29:25 PDT Buy It Now for only: $4.65 Buy It Now | Add to watch list |
 12pc 1 Mini Metal Spring Clamps Great for clipping everythingShips From USA $4.65 End Date: Wednesday May-30-2012 13:30:04 PDT Buy It Now for only: $4.65 Buy It Now | Add to watch list |
 12pc 1 Metal Spring Clamps Set $4.65 End Date: Thursday Jun-14-2012 22:50:35 PDT Buy It Now for only: $4.65 Buy It Now | Add to watch list |
 New Metal Clamp Trigger Acoustic Electric Guitar Capo $4.69 End Date: Wednesday Jun-6-2012 7:05:21 PDT Buy It Now for only: $4.69 Buy It Now | Add to watch list |
 NTE NTE2V250 Metal Oxide Varistor 240V RMS 630V Clamp $2.80 End Date: Thursday Jun-21-2012 8:47:14 PDT Buy It Now for only: $2.80 Buy It Now | Add to watch list |
 iPhone 3G 3Gs Proximity Sensor Bracket Metal Clamp Holder Replacement $4.89 End Date: Friday Jun-15-2012 8:35:16 PDT Buy It Now for only: $4.89 Buy It Now | Add to watch list |
 High quality Metal Change Clamp Key Capo Guitar $4.99 End Date: Monday May-28-2012 1:17:14 PDT Buy It Now for only: $4.99 Buy It Now | Add to watch list |
 NOS Homelite Metal Clamp 96363 $4.99 End Date: Wednesday Jun-20-2012 10:44:52 PDT Buy It Now for only: $4.99 Buy It Now | Add to watch list |
 C clamp G clamp 2 inch heavy duty metal woodworks carpenter handyman vise grip $2.99 End Date: Thursday Jun-14-2012 21:18:23 PDT Buy It Now for only: $2.99 Buy It Now | Add to watch list |
 6 Metal Flex Jaw Spring Clamp $2.50 End Date: Sunday Jun-17-2012 9:07:22 PDT Buy It Now for only: $2.50 Buy It Now | Add to watch list |
 Metal Spring Clamps 6 Set of 2 with Yellow Tip $1.99 End Date: Tuesday Jun-12-2012 13:02:19 PDT Buy It Now for only: $1.99 Buy It Now | Add to watch list |
 Turn Tyte 3 Wire Connector Body w Metal Clamp 10A 250V $5.25 End Date: Thursday May-31-2012 17:17:00 PDT Buy It Now for only: $5.25 Buy It Now | Add to watch list |
 Vintage FLEISCHMANNS GOLD COLOR METAL CLAMP CLIP FAMILY OF LIQUORS $2.99 End Date: Wednesday May-23-2012 22:43:50 PDT Buy It Now for only: $3.99 Buy It Now | Bid now | Add to watch list |
 4 in METAL WORM GEAR CLAMP DUCT CLAMP $3.50 End Date: Thursday Jun-7-2012 9:12:17 PDT Buy It Now for only: $3.50 Buy It Now | Add to watch list |
 Inline Fuel Filter 1 4 metal w hose clamps for 33031 GF1 F20117 GK68M G1 BF833 $2.60 End Date: Friday Jun-1-2012 15:09:31 PDT Buy It Now for only: $2.60 Buy It Now | Add to watch list |
 Lot of 8 2 Metal Spring Mini Clamp Clamps $3.89 End Date: Thursday May-24-2012 11:03:00 PDT Buy It Now for only: $3.89 Buy It Now | Add to watch list |
 NEW 4 PC METAL Strong Magnetic Spring Clips Clamp Set $5.59 End Date: Wednesday Jun-13-2012 8:56:49 PDT Buy It Now for only: $5.59 Buy It Now | Add to watch list |
 2 SMALL SILVERTONE METAL HAIR CLAMPS RED AB CRYSTALS LOTs of STYLES $2.17 End Date: Saturday May-26-2012 23:04:03 PDT Buy It Now for only: $2.17 Buy It Now | Add to watch list |
 2PK 4 Metal Clamps by Dundas Jafine 2MC4E $2.69 End Date: Friday Jun-1-2012 8:28:08 PDT Buy It Now for only: $2.69 Buy It Now | Add to watch list |
 Miniature Dollhouse Gun Metal C Clamp $2.99 End Date: Wednesday May-23-2012 12:58:59 PDT Buy It Now for only: $2.99 Buy It Now | Add to watch list |
 6 pk 2 Metal Spring Mini Clamp or Bonding Clips $3.99 End Date: Friday Jun-8-2012 19:10:40 PDT Buy It Now for only: $3.99 Buy It Now | Add to watch list |
 4 New Strong Magnetic Magnet Spring Metal Clips Clamps SHIPS FAST FROM NY 6132 $5.78 End Date: Friday May-25-2012 22:27:15 PDT Buy It Now for only: $5.78 Buy It Now | Add to watch list |
 2PK 3 Metal Clamps by Dundas Jafine 2MC3E $2.79 End Date: Friday Jun-1-2012 8:25:09 PDT Buy It Now for only: $2.79 Buy It Now | Add to watch list |
 XBOX 360 RROD X CLAMP REPAIR METAL WASHERS 100 BULK $5.89 End Date: Monday Jun-11-2012 13:44:44 PDT Buy It Now for only: $5.89 Buy It Now | Add to watch list |
 HARTING 09 00 000 5103 metal cable clamp PG21 $3.68 End Date: Saturday Jun-2-2012 10:37:29 PDT Buy It Now for only: $3.68 Buy It Now | Add to watch list |
 METAL SERVICE ENTRANCE HEAD CAP CLAMP 1 2 3 4 1 2 3 4 $5.95 End Date: Monday Jun-11-2012 14:05:56 PDT Buy It Now for only: $5.95 Buy It Now | Add to watch list |
 Spring Clamp Set 6 Pieces 2 inch Metal Shop Home Craft Assembly Glue Hobby Work $5.95 End Date: Monday Jun-18-2012 12:53:00 PDT Buy It Now for only: $5.95 Buy It Now | Add to watch list |
 Tsubasa Reservoir Chonicle anime manga metal pin Syaoran Li Clamp Sakura NEW $2.99 End Date: Saturday May-26-2012 13:45:15 PDT Buy It Now for only: $2.99 Buy It Now | Add to watch list |
 Trailer Metal Wire Loom Clamps 1 2 PACK OF 5 $1.99 End Date: Tuesday Jun-5-2012 7:51:06 PDT Buy It Now for only: $1.99 Buy It Now | Add to watch list |
 Quick Change Metal Folk Acoustic Electric Tune Guitar Trigger Capo Key Clamp US $5.99 End Date: Thursday May-24-2012 1:55:02 PDT Buy It Now for only: $5.99 Buy It Now | Add to watch list |
 Cincinatti Model 506 A Wood Or Metal Clamp $0.99 End Date: Monday May-28-2012 17:15:43 PDT |
 New 1 4 ID Reusable Metal Hose Clamp Silver 10pcs $5.99 End Date: Tuesday Jun-19-2012 21:17:42 PDT Buy It Now for only: $5.99 Buy It Now | Add to watch list |
 Globe Strut Metal Framing G 6502 Beam Clamp 3 8 $2.50 End Date: Tuesday May-29-2012 8:54:07 PDT Buy It Now for only: $2.50 Buy It Now | Add to watch list |
 NTE NTE2V420 Metal Oxide Varistor420V RMS1110V Clamp $4.07 End Date: Sunday May-27-2012 10:28:39 PDT Buy It Now for only: $4.07 Buy It Now | Add to watch list |
 HANDLEBAR CLAMP 5133297 POLARIS NEW METAL $6.07 End Date: Monday Jun-11-2012 15:51:53 PDT Buy It Now for only: $6.07 Buy It Now | Add to watch list |
 Rubber Head Clamp Sheet Metal Clamps $1.25 End Date: Thursday May-24-2012 17:03:09 PDT Buy It Now for only: $1.25 Buy It Now | Add to watch list |
 Cleco Type 1 4 Aircraft Clamp Sheet Metal Temporary 3H $0.99 End Date: Saturday Jun-9-2012 16:12:55 PDT Buy It Now for only: $0.99 Buy It Now | Add to watch list |
 Breeze Torque Hose Clamp Various Sizes Qty 4 Metal $6.43 End Date: Monday May-28-2012 15:18:54 PDT Buy It Now for only: $6.43 Buy It Now | Add to watch list |
 NEW HALEX COMPANY CLAMP TYPE CONNECTOR NON METALLIC $3.29 End Date: Saturday May-26-2012 12:24:49 PDT Buy It Now for only: $3.29 Buy It Now | Add to watch list |
 RROD XBOX 360 X CLAMP BULK REPAIR KIT 100 METAL WASHERS $6.69 End Date: Thursday Jun-21-2012 7:47:30 PDT Buy It Now for only: $6.69 Buy It Now | Add to watch list |
 MINI CLAMPS 4 Plastic 3 Strong Metal Spring Hobby Tools Modeling Crafts New I $2.99 End Date: Sunday Jun-3-2012 22:38:22 PDT Buy It Now for only: $2.99 Buy It Now | Add to watch list |
 2 Pcs Electric Power Tool Metal Wire Clamp Clip for Sander 4510 $6.92 End Date: Friday Jun-8-2012 17:54:17 PDT Buy It Now for only: $6.92 Buy It Now | Add to watch list |
 DEFLECTO MC450 4 METAL WORM GEAR CLAMP $1.99 End Date: Sunday Jun-10-2012 19:52:28 PDT Buy It Now for only: $1.99 Buy It Now | Add to watch list |
 Metal 90 Degree Wall Mounted Connector Support Clamp $6.94 End Date: Monday Jun-11-2012 21:35:58 PDT Buy It Now for only: $6.94 Buy It Now | Add to watch list |
 3 pc MINATURE METAL CLAMPS HANDY NEW $6.95 End Date: Wednesday May-30-2012 17:56:09 PDT Buy It Now for only: $6.95 Buy It Now | Add to watch list |
 Adjustable 52 76mm Range Metal Worm Drive Hose Clamp $6.97 End Date: Monday May-28-2012 22:25:48 PDT Buy It Now for only: $6.97 Buy It Now | Add to watch list |
 2 Metal Spring Clamp $1.99 End Date: Friday Jun-8-2012 11:00:18 PDT Buy It Now for only: $1.99 Buy It Now | Add to watch list |
 Adjustable 52 76mm Range Metal Worm Drive Hose Clamp $6.99 End Date: Wednesday May-23-2012 12:56:37 PDT |
 100 Bright Silver 6mm Bead Tip Wire Clamp On Crimp Split Loop Covers Findings $6.99 End Date: Thursday May-24-2012 15:17:19 PDT Buy It Now for only: $6.99 Buy It Now | Add to watch list |
 20 Gun Metal Plated 25mm Ribbon Clamp Ends Findings 39620 $4.99 End Date: Tuesday May-29-2012 14:19:48 PDT Buy It Now for only: $4.99 Buy It Now | Add to watch list |
 Antiqued gold metallic faceted flower hair clip barrette claw clamp accessory $2.99 End Date: Thursday May-31-2012 13:56:54 PDT Buy It Now for only: $2.99 Buy It Now | Add to watch list |
 2 piece G Clamp Set Made of Metal Great for Handyman Carpenters Hobbyist C Clamp $4.99 End Date: Thursday May-31-2012 21:18:09 PDT Buy It Now for only: $4.99 Buy It Now | Add to watch list |
 100 Bright Gold 6mm Bead Tip Clamp Crimp Connector Cover Beadtip Findings $6.99 End Date: Friday Jun-1-2012 12:59:54 PDT Buy It Now for only: $6.99 Buy It Now | Add to watch list |
 iphone 3GS proximity sensor cable metal bracket clamp $6.99 End Date: Thursday Jun-7-2012 18:32:35 PDT Buy It Now for only: $6.99 Buy It Now | Add to watch list |
 iphone 3G proximity sensor cable metal bracket clamp US $6.99 End Date: Monday Jun-18-2012 11:36:15 PDT Buy It Now for only: $6.99 Buy It Now | Add to watch list |
 BuickOldsPontiac AcDelco metal clamps 36 4132 $1.00 End Date: Sunday Jun-3-2012 16:34:54 PDT Buy It Now for only: $1.00 Buy It Now | Add to watch list |
 GI JOE 1 6 SCALE TOOL CLAMPS REAL METAL $5.00 End Date: Monday Jun-4-2012 7:23:22 PDT Buy It Now for only: $5.00 Buy It Now | Add to watch list |
 2 Pcs Adjustable 9 16mm Range Metal Worm Drive Hose Clamps $7.05 End Date: Thursday May-24-2012 1:51:50 PDT Buy It Now for only: $7.05 Buy It Now | Add to watch list |
 Stainless Steel Band Cable Tie Metal Hose Pipe Clamps $7.11 End Date: Thursday Jun-7-2012 22:15:44 PDT Buy It Now for only: $7.11 Buy It Now | Add to watch list |
 B LINE B2026 5 8OD METAL PIPE CLAMP 16911 $1.00 End Date: Tuesday May-29-2012 9:46:01 PDT Buy It Now for only: $1.00 Buy It Now | Add to watch list |
 Wall Mounted 8mm Thick Glass Metal Clip Adjustable U Shape Clamp $7.15 End Date: Wednesday May-23-2012 11:23:59 PDT |
 10 PC 2 METAL SPRING CLAMPS TARPS HOBBY CRAFTS F S H $7.15 End Date: Tuesday May-29-2012 10:23:14 PDT Buy It Now for only: $7.15 Buy It Now | Add to watch list |
 2 SPRING CLAMP FOR USE WITH WOOD METAL ETC $7.15 End Date: Monday Jun-4-2012 19:51:35 PDT Buy It Now for only: $7.15 Buy It Now | Add to watch list |
 2 Pcs Metal Hair DIY Salon Comb Twist Clamp Clips for Ladies $7.15 End Date: Saturday Jun-16-2012 19:20:16 PDT Buy It Now for only: $7.15 Buy It Now | Add to watch list |
 Wall Mounted 8mm Thick Glass Metal Clip Adjustable U Shape Clamp $7.16 End Date: Thursday Jun-7-2012 1:50:49 PDT Buy It Now for only: $7.16 Buy It Now | Add to watch list |
 2 Pcs Metal 14mm 16mm Adjustable Gas Pipe Hose Clamps $7.16 End Date: Friday Jun-8-2012 21:36:06 PDT Buy It Now for only: $7.16 Buy It Now | Add to watch list |
 2 long METAL SPRING CLAMP lot of 10 Free Shipping $7.18 End Date: Saturday Jun-9-2012 10:58:15 PDT Buy It Now for only: $7.18 Buy It Now | Add to watch list |
 Pair 02 Hole Dia Electric Tool Part Metal Clamp for Sander 4510 $7.20 End Date: Saturday Jun-9-2012 11:36:20 PDT Buy It Now for only: $7.20 Buy It Now | Add to watch list |
 10 Pcs 90 Degree Metal Clamp Bracket for Glass Shelf $7.20 End Date: Sunday Jun-10-2012 5:30:09 PDT Buy It Now for only: $7.20 Buy It Now | Add to watch list |
 METAL 2 long SPRING CLAMP lot of 10 $2.75 End Date: Saturday Jun-9-2012 10:58:15 PDT Buy It Now for only: $2.75 Buy It Now | Add to watch list |
 LONG YELLOW ENAMEL METAL CLAMP AB CRYSTALS $3.75 End Date: Friday Jun-8-2012 14:04:13 PDT Buy It Now for only: $3.75 Buy It Now | Add to watch list |
 Adjustable 70 89mm Range Metal Worm Drive Hose Clamp $7.29 End Date: Thursday Jun-7-2012 16:39:25 PDT Buy It Now for only: $7.29 Buy It Now | Add to watch list |
 Fuchsia black ombre metallic Big octopus hair clip barrette claw clamp accessory $3.29 End Date: Saturday Jun-9-2012 14:26:26 PDT Buy It Now for only: $3.29 Buy It Now | Add to watch list |
 Adjustable 78 101mm Range Metal Worm Drive Hose Clamp $7.30 End Date: Wednesday May-23-2012 13:40:48 PDT |
 Adjustable 105 127mm Range Release Bolt Metal Hose Tube Clamp $7.33 End Date: Tuesday Jun-5-2012 5:54:32 PDT Buy It Now for only: $7.33 Buy It Now | Add to watch list |
 64 76mm Range Adjustable Metal Hose Clamps Gator 2 Pcs $7.33 End Date: Friday Jun-8-2012 18:59:10 PDT Buy It Now for only: $7.33 Buy It Now | Add to watch list |
 Adjustable 78 101mm Range Metal Worm Drive Hose Clamp $7.34 End Date: Monday Jun-11-2012 6:26:31 PDT Buy It Now for only: $7.34 Buy It Now | Add to watch list |
 RG RAY 10 1 2 METAL CLAMPS 251 0038 QTY 2 $2.00 End Date: Wednesday May-23-2012 18:10:28 PDT Buy It Now for only: $2.50 Buy It Now | Bid now | Add to watch list |
 118 140mm Adjustable Metal Hose Piping Clamp for Worm Drive $7.35 End Date: Saturday Jun-9-2012 9:20:58 PDT Buy It Now for only: $7.35 Buy It Now | Add to watch list |
 40mm Diameter Plastic Star Head Metal Clamping Knob Blk $7.39 End Date: Wednesday May-23-2012 14:15:23 PDT |
 40mm Diameter Plastic Star Head Metal Clamping Knob Blk $7.39 End Date: Wednesday Jun-6-2012 11:26:31 PDT Buy It Now for only: $7.39 Buy It Now | Add to watch list |
You can also check out Amazon for information on Clamp Metal.
 SE 6 pc. 2" Metal Spring Clamps with Rubber Tips Sale Price: $4.68  Eligible for free shipping!Availability: Usually ships in 24 hours  |
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Distortion free heat treated metal stampings
A method of fabricating sheet metal parts comprising the steps of: stamping a pair of overlying metal sheets together to form a pair of stampings, heat treating the stampings, clamping the metal stamping together to correct distortion of the metal stamping during the heat treatment and welding the clamped metal stamping together to produce the part.
It has been known for some time that steel properties can be enhanced by heat treatment. Heat treatment generally improves the mechanical properties of a part by making it harder and stronger. Heat treatment can comprise of heating, quenching and subsequent annealing. Quenching comprises the rapid cooling of steel by emersion in liquids or gases or by contact with metal in order to harden the part. Annealing, on the other hand, comprises a heating and cooling operation employing usually slow cooling. In annealing the treatment of the operation of the rate of cooling depends upon the material being heat treated and the purpose of the treatment.
Metal parts may be made by a variety of processes including metal stamping. Metal stamping is the forming of metal by using a die and a punch that resembles the shape of the part. The metal stamping may be a hot or cold process. During the metal stamping process the part may either be shaped or formed which implies that the metal is bent or it may be punched which implies that the metal is cut as well as being formed.
Accordingly, stamping may be defined as the hot or cold forming of sheet metal by using a die and punch that resembles the shape of the part. The sheet metal is generally the metal of choice in stamping and comprises of metal of any thickness that is the form of a sheet which has one dimension much smaller compared to the other two dimensions. Usually the sheet metal can comprise of a thickness of 0.5 to 3 mm (0.020 to 0.120 inches).
During the stamping process the sheet metal is formed by using a die and a punch. A die is a tool that forms the part and generally comprises the male shape, while the punch is a tool that also forms the part and generally comprises the female shape.
The concept of forming the part from the soft material first and then once the material is formed heat treating it to improve the strength is very attractive and has been used for many years for low volume production. However, parts that have been formed and then heat treated are severely distorted and show little consistency in shape. Accordingly, the process has not been used in mass production of stampings.
One example of the prior art methods and apparatus can be illustrated by referring to U.S. Pat. No. 5,163,603 which relates to a process of manufacturing hollow triangular upper control arms by stamping a metal body forming an integral portion of the control arm and having a pair of opposing edges, bending the body along two substantially parallel lines and bringing the ends into mutual contact thereby forming a hollow modular section having substantially triangular cross-sectional configuration, welding to permanently join the edges, and piercing a plurality of apertures along the modular section for improving the harmonic resonancy.
Moreover, U.S. Pat. No. 3,068,564 relates to a method of producing laminated metal strips and more particularly to laminating under heat and pressure only.
Yet another method of laminating metal foil and particularly two double sheets of foil which are rolled together in close face-to-face contact and coiled as a single sheet is disclosed in U.S. Pat. No. 2,529,884.
Moreover, U.S. Pat. No. 2,244,847 relates to a method of making structural elements of sheet metal, while U.S. Pat. No. 2,159,043 relates to the making, handling and working of metal members and more particularly to pressure control expedience to be employed during the conditioning, working and handling of such members.
It is an object of this invention to produce sheet metal parts with minimal distortion. More particularly, it is an object of this invention to provide an improved method of fabricating sheet metal parts having little distortion after heat treatment.
The broadest aspect of the invention relates to a method of producing a sheet metal part comprising the steps of: placing a pair of overlying metal sheets in a press and simultaneously forming said metal sheets to a desired shape; heat treating said formed metal sheets so as to increase the mechanical properties of said formed metal sheets and distort said formed metal sheets from said desired shape; clamping said formed heat treated metal sheets together so as to bend said distorted metal sheets back to said desired shape; welding said clamped heat treated metal sheets together to produce said part with said metal sheets with said desired shape.
It is another aspect of this invention to provide a method of fabricating a sheet metal part comprising the steps of: stamping at least a pair of overlying metal sheets simultaneously to form at least a pair of stampings having a desired shape; heat treating said stampings so as to increase the mechanical properties of said stampings, said stampings exhibiting distortion from said desired shape by said heat treatment; clamping said stampings together to bend said distorted heat treated stampings to said desired shape and correct distortion of said stampings; welding said clamped stampings together to control said distortion and to produce said part with said desired shape and increased mechanical properties.
In metal stamping it is generally important to have material that is easily formable. Formability of the part means ease of changing shape. In other words, it is better to have material as soft as possible since it may be easier to stamp.
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