Several new assembly products offer improved productivity for joining parts for automotive and a myriad of other industrial applications. A new screw for cross threading is a good example. Cross alignment of screws into counter threads can lead to downtime, and even worse, quality and safety problems. A new design is said to improve feed into the target application. In another example, self-clinching thread standoffs allow assembly in spaces that are difficult for standard types of fastening hardware.
STANDOFFS FOR TIGHT SPACES
Self-clinching threaded standoffs from PennEngineering can be installed close to edges in thin metal sheets to provide solutions where space for fastening hardware may be limited. These fasteners enable components to be spaced or stacked in an assembly using minimal hardware. Stainless standoffs are available in two lengths and in thread sizes #4-40 and M3. They can be installed flush in steel or aluminum sheets as thin as .037 inch/0.94 mm and with minimum centerline-to-edge distances of .126 inch/3.2 mm. Installation is accomplished by inserting the standoff through a mounting hole with the correct diameter and into an anvil. Keeping punch and anvil surfaces parallel, sufficient squeezing force is applied until the standoff’s head embeds flush in the sheet. Upon installation, the fastener becomes a permanent part of the metal assembly and mating hardware completes final component attachment.
HYDRO-PNEUMATIC TOOLS BOOST RELIABILITY
New Avdel Genesis nG hand tools are said to increase reliability, ergonomics, productivity and service compared to the models they replace. They are also described as stronger and faster. The new hydro-pneumatic installation tools are applicable in assembly operations that use breakstem rivets and lock bolts in automotive, vehicle manufacturing, construction and general industry. They weigh between 1.5 and 2.28 kg (between 4.3 and 5.0 lb), with pull forces that vary between 6.0 to 18.68k (between 2,100 and 4,200 lbf).
MAKING SURE THREADS ALIGN
The new MAThread screw for cross threading applications from Arnold Umformtechnik contributes to shorter cycle times by minimizing failures, repairs, scrap and downtime. Engineers often encounter assembly problems caused by cross-alignment of screws into the counter threads. This problem adversely affects cycle rates and assembly workers may be at risk of injury. The cost of repair, failures and scrap adds costs to the production process. A special dog point design in the MAThread is said to provide optimum feed into the application. As the threads come into contact, MAThread begins to cam over the female thread. The MAThread design forces the two thread helixes to align. The supplier says the dog points are shorter, lighter and can be used in more applications than other special fasteners.
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