jikangchen
ALCOHOL
- Joined
- Jan 16, 2003
- Messages
- 78
It's a good day, Spring is now coming.
It's a good day, my knife was broken.
As my new hunter size blade prototype was now finished,I tried to do some testing.
Now friends, I'd like to show you some pics.
It's now good days in NanJing,low air pollution. Sunshine and very good air(comparing before). I went to countryside to meet my parents and test my new knife.
See some potherb in the lower reaches of ChangJiang River.
I did a little in the night when I went to my parents' home, I chopped bamboo, but seems a hunter size knife is not fit for chopping as expected.
On the next day, I began to do some testing we wished.
First is digging hole in a pine tree plank.
After about 200-300 times of digging, we got the hole.You can't find any blade changing in the pics, but there do have some white piont on the tip blade.
The pine plank is about 1.5" thick, S35VN is good at it's job.
Let's try something else. How about Baton? Here's some cut wood around me which my father has already split.As my knife is not an axe, the split woods are big enough for our testing.
The knife can shave hair during the Baton.
A branch wood knot is a small challenge, of course we can baton it avoiding the knot, but let's try.
After all the works, we can see everything is well. Knife can still shave hair,but not smooth.
Here's the hero which helped us to do the baton.
Surface is bad after these, Stonewash always makes us happy after washing.
I felt good up to now. But bad news came.
I'm a knife throwing fan indeed. I decreased the handle weigh to change the gravity center for throwing.Now see the pics friends.
Everytime, I try to throw several times to find the correct distance between the target and me.Then increase strength time by time.I have a short video before the broken.But I can't upload it to Youtube.Chinese can't visit youtube at all.I tried to upload it to photobucket,But I don't know how to put it in this thread.Here's the link,very slow for me here.
http://s583.photobucket.com/user/njchenjiyi/media/Honest/5E8F521701.mp4.html
After I confirmed the correct distance,after this video, I put all my strength on it and tried to do a strongest throwing.Tragedy happened.I missed the target, knife flyed to the wall foot.With a unhappy sound of metal, the knife broken.
We can see the fracture surface is uniform and symmetric.
I did the heat treat seriously following the crucible datasheet. I chopped the iron wire several times with a water pipe on an iron block.The edge is not bad.
No problem with heat treat.That's clear that my design should be updated.The handle lightening make the knife weak at the middle. Middle is the weakest part of a knife, weakest part was weaked. Broken started from the hole,Small contact surface for rivet and the hole because of lightening. Sorry I can't explain it in scientific english.
Now new project:
No flute around the first bolt.
and,first rivet is at the narrowest point of the blade.
Also,a little narrow for index finger(broken piont)
Seems new project done.
But as we know, stress increase linearly from ends to middle,Let's make linear lightening,No knife could broken at the second part of the handle.also weight decrease there could change the gravity center more effectively.
Now I'm very glad to show you my new design. I think it is good and worth my paying.
Thanks for looking. Really big job for me to say these in English.
It's a good day, my knife was broken.
As my new hunter size blade prototype was now finished,I tried to do some testing.
Now friends, I'd like to show you some pics.
It's now good days in NanJing,low air pollution. Sunshine and very good air(comparing before). I went to countryside to meet my parents and test my new knife.
See some potherb in the lower reaches of ChangJiang River.
I did a little in the night when I went to my parents' home, I chopped bamboo, but seems a hunter size knife is not fit for chopping as expected.
On the next day, I began to do some testing we wished.
First is digging hole in a pine tree plank.
After about 200-300 times of digging, we got the hole.You can't find any blade changing in the pics, but there do have some white piont on the tip blade.
The pine plank is about 1.5" thick, S35VN is good at it's job.
Let's try something else. How about Baton? Here's some cut wood around me which my father has already split.As my knife is not an axe, the split woods are big enough for our testing.
The knife can shave hair during the Baton.
A branch wood knot is a small challenge, of course we can baton it avoiding the knot, but let's try.
After all the works, we can see everything is well. Knife can still shave hair,but not smooth.
Here's the hero which helped us to do the baton.
Surface is bad after these, Stonewash always makes us happy after washing.
I felt good up to now. But bad news came.
I'm a knife throwing fan indeed. I decreased the handle weigh to change the gravity center for throwing.Now see the pics friends.
Everytime, I try to throw several times to find the correct distance between the target and me.Then increase strength time by time.I have a short video before the broken.But I can't upload it to Youtube.Chinese can't visit youtube at all.I tried to upload it to photobucket,But I don't know how to put it in this thread.Here's the link,very slow for me here.
http://s583.photobucket.com/user/njchenjiyi/media/Honest/5E8F521701.mp4.html
After I confirmed the correct distance,after this video, I put all my strength on it and tried to do a strongest throwing.Tragedy happened.I missed the target, knife flyed to the wall foot.With a unhappy sound of metal, the knife broken.
We can see the fracture surface is uniform and symmetric.
I did the heat treat seriously following the crucible datasheet. I chopped the iron wire several times with a water pipe on an iron block.The edge is not bad.
No problem with heat treat.That's clear that my design should be updated.The handle lightening make the knife weak at the middle. Middle is the weakest part of a knife, weakest part was weaked. Broken started from the hole,Small contact surface for rivet and the hole because of lightening. Sorry I can't explain it in scientific english.
Now new project:
No flute around the first bolt.
and,first rivet is at the narrowest point of the blade.
Also,a little narrow for index finger(broken piont)
Seems new project done.
But as we know, stress increase linearly from ends to middle,Let's make linear lightening,No knife could broken at the second part of the handle.also weight decrease there could change the gravity center more effectively.
Now I'm very glad to show you my new design. I think it is good and worth my paying.
Thanks for looking. Really big job for me to say these in English.
