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3 members (KDGJ, Lloyd3, 1 invisible),
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Joined: May 2011
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Sidelock
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Sidelock
Joined: May 2011
Posts: 1,071 |
Interesting process on tube making and the connection to Meffert. That was a fair amount of tubes being rolled out.
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Joined: Aug 2007
Posts: 11,119 Likes: 228
Sidelock
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Sidelock
Joined: Aug 2007
Posts: 11,119 Likes: 228 |
Yes, those were all rifle & shotgun tubes. They made many other like heavy mortar & I'm sure tank barrels. But the sporting arm barrels were noted as being much stronger than the wound or coiled damascus barrels/pattern welded tubes.
Cheers,
Raimey rse
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Sidelock
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Sidelock
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Yes, I could see that if I am correct in thinking that the radial process involved forming the tubes under hydraulic pressure?
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Joined: Aug 2007
Posts: 11,119 Likes: 228
Sidelock
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Sidelock
Joined: Aug 2007
Posts: 11,119 Likes: 228 |
Below is a forced translation:
>>....the Ehrhardt pressing process using special steel is particularly suitable for the manufacture of hunting and military rifle barrels. After the ingot is pierced, the barrels are given several passes, pass through a conical rolling mill and are ground to exact calibre. In the conical rolling mill, the cylindrical barrels are not only given a tapering shape, but the shell material is also spiralled along its longitudinal axis......<<
Cheers,
Raimey rse
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Sidelock
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Sidelock
Joined: May 2011
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Ah, that explains the process more clearly. Thanks.
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Joined: Aug 2007
Posts: 11,119 Likes: 228
Sidelock
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Sidelock
Joined: Aug 2007
Posts: 11,119 Likes: 228 |
Not sure that the method is fully clear, but it points in a general direction.
>>In Deutschland wurde eine ähnliche Art der Rohrerzeugung zuerst im Jahre 1892 von der Rheinischen Metallwaren- und Maschinenfabrik in Düsseldorf ausgeführt, nachdem der Hauptinhaber dieser Firma (Geheimer Baurat Heinr. Ehrhardt, ein auch sonst in der Rohrfabrikation mit hervorragenden Verbesserungen und Erfindungen hervorgetretener Geist, den Oberingenieur und Betriebsleiter Green der vorgenannten Spiral Weld Tube Company in East Orange nach Europa geholt hatte und dieser mit dem deutschen Ingenieur Leybold eine Neu- konstruktion der bekannten amerikanischen Maschine vorgenommen hatte, deren Ausführung die Maschinen- fabrik Heinr. Ehrhardt in Zella übernahm. <<
A bit of German for those few who have command & are following along. Interesting that it mentions a >>Spiral Weld Tube Company<<??
>>Weitere Einrichtungen und ArbeitsvorschlSge zur Erzeugung von spiralgeschwei£ten Rohren sind in Deutschland noch von Julius Wttstenhöfer (D. R. P. Nr. 51069, 53532, 58163 usw.), Carl Kratz und Julius Straßmann (D. R. P. Nr. 63307) sowie von Eduard Zimmermann (D. R. P. Nr. 65088) gemacht worden. <<
Some advancements in Spiral Tube technology by Germans......
Cheers,
Raimey rse
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Joined: Aug 2007
Posts: 11,119 Likes: 228
Sidelock
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Sidelock
Joined: Aug 2007
Posts: 11,119 Likes: 228 |
A re-post with a bit more info:
Alleinige Verwertung Der Gewehrlauf-Marke R.O.M.(Rheinischen Metallwaren- und Maschinenfabrik) Radial-Stahl-Rohr-Extra Qual (Patent Ehrhardt)
Cheers,
Raimey rse
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Joined: Aug 2007
Posts: 11,119 Likes: 228
Sidelock
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Sidelock
Joined: Aug 2007
Posts: 11,119 Likes: 228 |
A bit more general info:
>>Ehrhardt'sches Preß- und Ziehverfahren:
128 Patente wurden von ihm im Deutschen Reich registriert. Die 1891 patentierten Verfahren, die unter dem „Ehrhardt'schen Preß- und Ziehverfahren“ zur Fabrikation nahtloser Rohre bekannt wurden, werden heute noch in der Industrie angewendet. Bekannt machte ihn auch die Entwicklung des Rohrrücklaufgeschützes. Die 7,5-cm-Ehrhardt Modell 04 Gebirgskanone, an deren Entwicklung und Produktion er maßgeblich beteiligt war, wurde nach ihm benannt.<<
By 1903, due to conflicts & disagreements with shareholders the adept inventor withdrew from some or all parts of his individual businesses.
Cheers,
Raimey rse
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Joined: May 2011
Posts: 1,071
Sidelock
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OP
Sidelock
Joined: May 2011
Posts: 1,071 |
I hit the translate site, lol. Interesting info on the tubes. Ehrhardt had quite a number of patents.
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