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6063 results about "Rivet" patented technology

A rivet is a permanent mechanical fastener. Before being installed, a rivet consists of a smooth cylindrical shaft with a head on one end. The end opposite to the head is called the tail. On installation, the rivet is placed in a punched or drilled hole, and the tail is upset, or bucked (i.e., deformed), so that it expands to about 1.5 times the original shaft diameter, holding the rivet in place. In other words, pounding creates a new "head" on the other end by smashing the "tail" material flatter, resulting in a rivet that is roughly a dumbbell shape. To distinguish between the two ends of the rivet, the original head is called the factory head and the deformed end is called the shop head or buck-tail.

Interlocking suture clinch

The invention is directed to a suture clinch that may be placed upon suture extensions of a placed suture to securely lock the extensions in a desired location. The clinch operates to replace a tied knot and retain the suture in a fixed relationship with little or no damage to the suture itself. The clinch comprises a mating pair of interlocking members that restrict movements of the suture. The interlocking members may be placed upon the suture extensions from alongside the suture extensions and compressed to a first condition where the interlocking members may be advanced, retracted or adjusted, and subsequently further compressed to a second condition where the interlocking members are fully engaged to fully restrict the movement of the suture. In another aspect, the clinch may be provided in a flat form comprising a first component and a second component. The first and second components fit together in a mating relationship that entraps at least a portion of the suture between tractive faces of the first and second components, respectively. Each end of the first and second components may have a recessed central portion that leaves two extensions along the sides of each end of the components. The extensions of the second component are subsequently folded over the first component to provide secure entrapment of the suture between the tractive faces of the first and second components. The tractive faces operate to engage the suture and hold it securely in place without damaging or challenging the suture. The clinch may comprise of plastic, metallic materials such as stainless steel or titanium, or a combination of both where the plastic is chosen for its value as an atraumatic interface and the metal for its radiopacity or durability.

Hemming method and apparatus

Improved method and apparatus for interlocking hemmed together edges of inner and outer vehicle body panels with an improved interlock joint. The inner panel blank is draw stamped and provided with PLP holes in a stamping press. A plurality of conventional hardware components are then welded to the inner panel. Then interlock holes are formed by a piercing tool moving through the inner panel border from its outboard to its inboard side while the inner panel is held by clamps and PLP pins. The hole piercing punch thus leaves cold worked upset material slightly raised inboard, rather than outboard, around the pierced interlock hole margin. Then the inner panel subassembly is married to the outer panel and transferred to a hemming station and again precisely clamped and positioned by PLP pins, whereupon hemming press gates are operable for hemming the flange lip of the outer panel over the inner panel border. The final hemming steel of each gate carries staking punches that individually strike a precision registered portion of such hemmed lip to deform it into locking engagement with the associated interlock hole. The upset material is thus flattened and accurately worked into embedment into the interior surface of the hemmed flange lip, rather than into the interior surface of the outer panel, thereby avoiding creating read through problems on the outer panel.

Self-piercing frictional rivet welding connecting device

The invention relates to a self-piercing frictional rivet welding connecting device which belongs to the technical field of rivet welding. The device comprises a driving needle, a blank holder, an annular guide slot, an annular positioning spring, a semi-tubular rivet and a female die, wherein the driving needle is sleeved in the blank holder; the semi-tubular rivet is positioned below the driving needle; the annular guide slot is formed in the blank holder; the annular positioning spring is arranged in the annular guide slot; the semi-tubular rivet is positioned on the annular positioning spring; and the female die is arranged below the semi-tubular rivet. The high-strength steels are softened by using the friction heat generated by speedily rotating the rivet so the percentage of elongation of the high-strength steel is increased, the riveting force and the rigid requirement on equipment are reduced, the joint efficiency of friction stir spot welding is improved, the technical shrinkage pool is eliminated, the joint strength is efficiently increased, the mechanical-solid phase double joint is realized and the static and dynamic mechanical properties of the joint are greatly improved. The connecting device of the invention is applied to the connection between the light alloy and the high-strength steel and is also applied to the connection between the different light alloys and between different high-strength steels.

Machine vision automatic detection system for rivets

The invention discloses a machine vision automatic detection system for rivets. The machine vision automatic detection system for rivets comprises a PLC (programmable logic controller), two industrial cameras, a storage bin, a vibration feed plate, a linear rail, a mechanical rotary plate, a waste product blowing pipe, a waste product discharging trough, a salable product blowing pipe, a salable product discharging trough, discharging baffles, an image acquisition card, an industrial personal computer, a touch screen, an electromagnet, a pneumatic electromagnetic valve, an upper sensor, a lower sensor, a hole sensor, a count sensor, a stepping motor drive and a stepping motor. The detection precision of the machine vision automatic detection system for rivets is within +/-0.03mm, and the electromagnetic valve is controlled by the PLC to complete precise waste product blowing and realize separation of salable products from waste products. The final number of the salable products is accurately recorded by a counter, and a discharging port is closed according to time difference to prepare for a subsequent packaging procedure. In addition, all data are recorded in a database, and various production, client, analysis and CPK (complex processing capability index) report forms can be generated by one key.
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