摘要:
The present invention is an assembly line for continuously manufacturing self-attaching fasteners from a metal rod having a predetermined profile. The self-attaching fasteners are joined together with wires and reeled onto spools for use at a secondary installation site. More importantly the invention is an improved streamline method and apparatus which produces burr-free self-attaching fasteners, without deformation, and joins the self-attaching fasteners and wires together within a die press.
摘要:
An apparatus and method are provided for angularly extruding a workpiece through a die to form blanks and articles having refined grain structure. The die is also used to form the workpiece to a desired shape, such as a cylinder. The angular extrusion method can be used in place of some heat treatments, thereby lowering the cost and time for manufacturing articles. The method is compatible with materials with high strength-to-weight ratios such as aluminum, titanium, and alloys thereof. The blanks can be used to form articles having favorable mechanical properties such as strength, toughness, formability, and resistance to fatigue, corrosion, and thermal stresses.
摘要:
High strength aluminum alloy rivets are provided in which the aluminum alloys exhibit high strength at atmospheric temperatures and maintain high strength and ductility at extremely low temperatures. The rivets are produced from an alloy which is made by blending about 89 atomic % to 99 atomic % aluminum, 1 atomic % to 11 atomic % of a secondary metal selected from the group consisting of magnesium, lithium, silicon, titanium, zirconium, and combinations thereof, and up to about 10 atomic % of a tertiary metal selected from the group consisting of Be, Ca, Sr, Ba, Ra, Sc, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Y, Nb, Mo, Tc, Ru, Rh, Pd, Ag, Cd, W, and combinations thereof. The alloy is produced by nanostructure material synthesis, such as cryomilling, in the absence of extrinsically added refractory dispersoids. The synthesized alloy is then consolidated and formed into a solid or blind rivet. Grain size within the rivet is less than 0.5 nullm, and the rivet has exceptional thermal stability, resistance to strain localization cracking during rivet head upsetting, and resistance to stress corrosion cracking during service.
摘要:
An aluminum-alloy article such as a fastener is prepared by providing an aluminum-alloy article precursor that is not in its final heat-treated state, and in one form is in its solution treated/annealed state. A curable organic coating material is also provided. The method includes anodizing the article precursor, preferably in chromic acid solution and without chemical sealing during anodizing, applying the organic coating material to the aluminum-alloy article precursor, and precipitation heat-treating the coated aluminum article precursor to its final heat-treated state, thereby simultaneously curing the organic coating. If the aluminum alloy temper is of the naturally aging type, it is optionally lightly deformed prior to precipitation treatment aging. The approach may also be applied to articles that are not solution treated/annealed and aged, by first overly deforming the article precursor so that the curing treatment of the coating also partially anneals the article precursor to the final desired deformation state.
摘要:
A method of manufacturing a fastener such as bolt, rivet and the like having an integrated flange on the head. The flange may be made of any metal and in any form, but must have a central flat part where it is integrated with the head. The head is two stage cold headed. After a first flowing cold heading, the head is inserted into an opening in the central flat part of the flange and finishing cold headed simultaneously with the integration of the flange on the head so that flow of structure of the head partly surrounds the part of the flange received in the head.
摘要:
A METHOD OF FORMING AN ULTRA HIGH-STRENGTH BUCKABLE BOLT, SUCH AS A RIVET, WHEREIN AN INITIALLY UNIFORMLY SOFT RIVET BLANK IS SELECTIVELY COLD WORKED TO SELECTIVELY WORK HARDEN A PORTION OF THE RIVET BLANK WHILE MAINTAINING ANOTHER PORTION OF THE BLANK IN THE INITIALLY SOFT CONDITION. AFTER HEAT TREATING, THE BLANK IS MACHINED TO THE FINAL RIVET SHAPE WITH THE SOFTER PORTION BEING RETAINED AS THE RIVET TAIL SO THAT IT CAN BE READILY UPSET, AS BY BUCKING OR SQUEEZING, WITHOUT CRACKING WHEN THE RIVET IS INSTALLED.
摘要:
A GUN-SHAPED DIE FOR MANUFACTURING RIVETS MADE OF AN ELASTIC ETAL HAVING AT ONE END A SLIGHTLY INWARDLY TAPER ING FLANGE MEMBER AND AT THE OTHER END A FLANGE MEMBER APPROXIMATELY TWICE AS GREAT OR GREATER IN DIAMETER THAN THE INWARDLY TAPERING FLANGE MEMBER. THE PORTION OF THE GUN-SHAPED DIE BOUNDED BETWEEN THE TWO FLANGE MEMBERS HAS A THICKNESS SUFFICIENT TO WITHSTAND ELASTIC DEFORMATIONS AND GENERALLY THE THICKNESS OF THIS PORTION WILL BE APPROXIMATELY EQUAL TO THE BORE OF THE DIE.