www.NCTfrictionwelding.com Friction Welding of Solid part to tube.

[TheSIDHARTH007]

excellent



[24preacherboy]

Bruce Lee can friction weld his hands together.

[24preacherboy]

Chuck Norris can friction weld two pieces of pipe together with his bare hands.

[zfdtscsfxdsxgt]

that was awsome...

[chena3]

big boy toys

nice

[femtophysiker]

EXcellent...

[Speed796]

AWESOME !!!

[graffitiballz]

this shit is crazy. and red hot chili peppers too....nice on all accounts

[NCTFrictionWelding]

Pressure depends on a welded area. For smaller parts we use 6 to 20 ton machines. Bigger stuff - up to 150 ton. So if someone willing to junk his CNC lathe, good luck. It could be costly test!!! :(

[yur2slow]

How much pressure is needed? I see people trying to friction weld tools with cnc lathe! lol! Can this be done in cnc lathe without causing damage

[marrabooboo]

No its not possible to friction weld on a CNC lathe. The axial forge loads required during the weld cycle depend on the chemical composition, the geometry of components and the characteristics of the completed welds heat affected zone. These machines have taper roller bearings capable of withstanding dynamic loads of at least 2 times the maximum thrust load provided by the forge cylinders. Lathes are not capable of withstanding the forces, which can range from 5 to 25 tons/inch of weld area.

[marrabooboo]

Additionally, yes inferior welds can be replicated on a manual lathe and have been used for this with limited success frequently in the old days, this would be more a controlled seizure than a friction weld; however for the reason stated above, only small components like drills could be joined. The use of a CNC lathe would be dangerous, there is no feedback of force applied to the spindle and would almost certainly result in catastrophic machine frailer as my friend at NCT has pointed out.

[NCTFrictionWelding]

The disk (solid part) is rotating in the chuck and the tube is stationary in the clamp. This way you can get friction between two parts. Second stage is higher pressure witch creates more friction/temperature! After that is final stage - third pressure when two parts penetrate each other. That is all! You have joined these two part together!

[gfriedline]

What effect does surface finish have on this form of production? I am sure that rougher finishes would lead to a higher coefficient of friction at the bonding surface. Also, the machine removes the excess weld metal at the end of the process, is this preffered only for aesthetics, or for part fitment? How much weld reinforcment remains at the edge?

How homogeneous are the welds in this process? Would the center of a solid shaft have a less effective weld due to reduced friction?

[marrabooboo]

The surface finish of the pre-weld interface has little effect on the weld as arguably most or all of the interface material is extruded in the form of flash during second friction or in forge collapse in third friction. The surface finish will affect the ramp up of weld interface temperature during first friction but only for maybe less than the first half second. Contaminates like oxidisation, lubricants and surface coatings would have more of an effect than surface finish.

[marrabooboo]

The higher axial thrust force (pressure) applied during the second friction phase of the weld technically cools the weld interface in comparison to first friction phase. The higher the axial thrust force and the lower the peripheral speed of rotation (angular velocity) the higher the torque and therefore thelower the temperature. But yes their stuck together alright!

[mattdrummer9]

does the pipe start spinning with the disk even though its in that vice?