Fracture and Assembly Machine Connecting Rod Cracker

[@Torsee]

Awesome video! Would love to see up close the moment of cracking the rod. Must be super precise pressure.

[@ferdi2431]

kzbin.info/www/bejne/q4Ddpo19Z7SSnpI

[@edgewatersbestguitarist1524]

Did not see what was going on at all

[@machinedoctorsinc3297]

If you have questions. I can explain

[@jghall00]

@@machinedoctorsinc3297 It would be great if you could annotate the video.

[@CallofDoobie585]

​@@machinedoctorsinc3297i do... At what point does the rod get cracked in the video... Il keep it simple for the other simpletons

[@machinedoctorsinc3297]

@@jghall00 I will do that.

[@dustinandtarynwolfe5540]

You have to listen closely for the little tink

[@khalidnawaz6536]

The cracker works for the following steps.1. Robot Load and unload the on cracker. 2. In station 2 the table rotates and split the part or fracture the part with the help of an hydraulic wedge. 3. The bolt feed in into the holes with a torque of 25N/m( depend upon the type of a machine) 4. Then the table again rotates and applied a Re-torque with a force of 40 N/m and then finally the table rotates and go back to the 1st step to unload the part.

[@machinedoctorsinc3297]

You are correct about the robot load and the fracturing being done in station two. Next, the fracture plane is cleaned with air, and then the bolts are inserted and torqued to the customer's specifications. The bolts are first torqued to 35nm then backed off and torqued to 40nm + 90° rotation. The resulting torqued is above 90nm. The part is then transferred to a bushing insertion station, then transfered to the unload station/robot.

[@willywinket]

Man, those automation engineers are sure smart!

[@AngelaWest-if5ko]

I wonder how they get them to fracture evenly?

[@machinedoctorsinc3297]

@AngelaWest-if5ko there are a few things that go into keeping the fracture straight. The short version is a special fixture, custom designed wedge & jaws in addition to a vee being broached into the rod to create a weak point.

[@raginroadrunner]

the rod is powder till it is heated. It is a cheap rod for a cheap engine.

[@machinedoctorsinc3297]

@raginroadrunner Most rods are powdered metal these days. This rod is from the 2017 Duramax Diesel. Forged steel rods are rare these days.

[@theamerican7080]

It's very difficult to see what's going on because the rod must be securely clamped to the tool from all sides to not only isolate the fracture point, but the rod is tweaked ever so slightly- just a few thousands- to make a clean break without bending the rod bosses.

[@big_deal9650]

And who developed the cracking of connecting rods? Alfing Kessler Sondermaschinen Germany, World market leader in the production of connecting rods.

[@machinedoctorsinc3297]

Actually, that is not true. The process was developed by Ford. And the first patent is held by G&L. You are right about one thing though, Alfing is the largest manufacturer of connecting rod machinery that is left.

[@raginroadrunner]

Correct.

[@captainbob5286]

My hope was to see the fracturing process.... I think I just saw it...

[@NINGU_MULIMANI]

Sansera company

[@Guds777]

This is not the splitting operation, they put them in a vise and crack it with a sledgehammer... :D

[@raginroadrunner]

pretty much...

[@pigup2]

Does the fracturing happen at 0:43?

[@machinedoctorsinc3297]

The fracturing happens at about 13 seconds in.

[@elimaysel4mwashier398]

What is happening?

[@machinedoctorsinc3297]

After the rod is clamped the fracture jaws are inserted into the crank bore and then a high speed wedge separates the jaws causing the fracture.

[@codysmackdown1]

Worst video of how it's made I've ever seen

[@petercunningham3469]

Regardless of the humongous machine cracked rods really are of no benefit unless your only interested in production cost.

[@machinedoctorsinc3297]

Fracturing rods has nothing to do with cost. It is the best and only real way to ensure the cap and beam fit perfectly and precisely back together.