AK，到底是锻铣，还是冲压（forged & milled vs stamped)

happyfrog

graycat2006 发表于 2016-1-6 08:10
从Las Vegas靶场的统计看, AK最后报废都是节套出现疲劳裂纹, 机匣都没问题. 另外, 有没有证据表明切削机匣 ...

他们那至今还没有锻铣的AK坏，但stamp AK 有各种情况，除了最经常的front trunion:
1.有个机匣中间裂开的：https://www.ar15.com/forums/t_4_ ... _6_.html&page=3http://i.imgur.com/NxPpNXT.jpg
[size=10.6667px]Here's a pic that demonstrates where we initially welded the receiver. I thought it was just a hot round that caused it to crack. There were no signs of over pressure or burning on the bolt, carrier or trunion area but after running the range for the last two and half years, nothing will surprise you. We used the plasma cutter to demil the weapon before removing it from the NFA registry.

[size=10.6667px]After the other N-PAP's had issues we pulled them all. I am in no way saying that all Serbian weapons are prone to this or the older Yugos are of the same quality. I just know what happened to our rifles and we can't risk the liability of a catastrophic failure on the range. I know Century imports them and don't cast any fault on them either because all of the WASR's we get from them have all been home-run's.

[size=10.6667px]If any of you guys are ever in Vegas and want to see the backside of the operation here at Battlefield Vegas, email me at RCheney@BattlefieldVegas.com. We've brought back many Arfcommers for a tour of the back and how we keep this play moving.

[size=10.6667px]http://i.imgur.com/Amp9f3o.jpg[size=10.6667px]

[size=10.6667px]V/R
[size=10.6667px]Ron

。2. 还有就是导轨容易坏：https://www.ar15.com/forums/t_4_ ... _6_.html&page=7
“[size=10.6667px]It seems we have a pattern for stamped receivers to fail along the top rail. Here's another WASR that cracked yesterday and initially the RSO that it was a kaboom but when I inspected it, it was clearly a cracked rail. When it cracked, it kept the bolt in the rearward position but the trunion and bolt were intact.[size=10.6667px]

[size=10.6667px]This AK went on the line December 2012 and other than a change of furniture and new bolt installed, records reflect an unremarkable history. This compares to the other AK's that suffered from the same failure and that was around the two-year mark.

[size=10.6667px]V/R
[size=10.6667px]Ron “
[size=10.6667px]

[size=10.6667px]3. 还有reartrunion 坏掉的WASR 10：[size=10.6667px]https://www.ar15.com/forums/t_4_64/159106_AK_abuse__home_built_version_update_on_Page_6_.html&page=10
[size=10.6667px]“[size=10.6667px]Here's an example of one WASR that didn't last as long as others. This is not the norm but with all of our past good experiences with WASR's, this is definitely worth noting.[size=10.6667px]

[size=10.6667px]A little background on this exact WASR. It went on the line 09 JUN 15 and has been used every day since with the exception for routine weekly cleaning. It was never off the line for a whole day, just cleaned and put back in service. This WASR did see quite a bit of use because of the new blonde furniture and RSO's usually grab the cleanest and "prettiest" weapons as previously discussed. The weapon did NOT have any function or reliability issues, it was just brought for cleaning when all of these issues were identified. The first thing that my armorer noticed was the erosion in the bolt. After seeing that, they figured there had to be other issues so they took their time and checked further for other issues. That's when they noticed the erosion through the gas tube and the crack in the rear trunion. Again, this weapon continued to function properly but it had to be pulled at that point because of safety issues.

[size=10.6667px]As for round count, AK's, Uzi's and AR15's get the most use but because of the "double your ammo" special with the AK, they get run even more. I can say a fair estimate for this weapon is 30 times in a day with magazines loaded to 25 rounds. If you take that number and consider it was on the line for 3 months, then a fair round count is 60,000+ plus rounds during that time period. Before anybody starts knocking the quality of the WASR's, this is the first time we've seen such wear on a fairly low-round (in our experience) WASR to date. The headspace is still within spec and there are no signs of wear or fatigue on the bolt or trunion. The rounds are still hitting the center of the target accurately (at 10-15 yards) and not keyholing. “

[size=10.6667px]

[size=10.6667px]4.head space 出问题，但节套都完好
[size=10.6667px]

[size=10.6667px]5。腐蚀的bolt 或是导气管。
[size=10.6667px]