什么原理加工出来的六方？

韩寒11

https://v.qq.com/x/page/y01459pxwld.html两种零件，一种是内六方，一种是小花键，都是直接通过工具加工而成的，六方使用的是车床，花键是加工中心


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零件在旋转，“刀具”在靠近，刀具不旋转，似乎是空挡状态，随着工件旋转

7 l. J: I3 a7 ~+ {; H& B进入孔中，“刀具”和工件共同旋转

花键还能好理解点，有一个内花键刀，通过加工中心的旋转产生振动，下压成型

下边的挤出来大的铁削都能看见

类似于上边的工具，都是什么原理啊，自己能否DIY一个呢？就是没什么精度的那种
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茹王钢

111111

dylbn

https://mp.weixin.qq.com/s?__biz=MzAwMjM3ODk2Mw==&mid=2649839731&idx=1&sn=02f1bb64f64655daf938af3614f74262&chksm=82cea5cfb5b92cd97115ddc9deb40c5c63be6afa0440d4c2b848ead6e7c1cacc7e19d1761deb#rd

leyfa7@126.com

晓昀 发表于 2018-3-27 20:52
% L  V0 l. ]9 t+ N外六方用铣床铣削，内六方加工方法没见过

7 v2 Y  b$ L0 Q' g4 A& m6 O铣床？   卧式铣车可以吗

韩寒11

勇哥ll 发表于 2018-7-20 13:43
, B- {" d2 N3 _4 d- i% k# u/ U我们是孔钻了之后冲床打的

& C2 {5 g5 j; D! r钻孔后车床打孔是可以的，现在是想有一个比较快捷的方式

勇哥ll

我们是孔钻了之后冲床打的

fatliu1983

楼主这是什么厂家的刀具？

CDKEY*

***网上找来的图***
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CDKEY*

****轉貼老外的DIY***A Homemade Rotary Broach(Idea from randyc on the Practical Machinist Forum)
[size=-1]Photos and text copyright 2014 by James P. RiserFor an upcoming project I need to have square holes. On the prototype I merely filed a round hole to shape. This will not do for production. I was very pleased to see a thread by randyc on the Practical Machinist Forum. His design for a rotary broach would work for my upcoming needs. This is my build of his design.
& P/ d, h! e2 Z/ @! [ The machined parts for the rotary broaching tool are shown here. This is standard machining.
! M' v9 j% n- O# j Here is the ball bearing in position between the parts.
On the left is the body of the holder with its offset depression. The piece on the right has a matching depression in one end. The other end was drilled and bored to hold the 10mm broaching tool.
A groove is needed in the bearing end of this holder.
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( m/ }4 w( F2 @The assembled parts are shown here.
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* W3 @% I/ ]9 o4 u7 O, \+ b' ~The holder was made from available tool steel pieces in my "scrap bin". The body is 1" diameter A-2 with one end turned down to 1/2" and the tool holder is 5/8" diameter W-1. The broach tool is made from 10mm HSS drill blank. This came in a 5" length and needed to be cut in half.
  p6 c; u) @# q  f$ u3 s% ZAs with the original described on the Practical Machinist Forum, the 4 set screws merely keep the holder from falling apart. The set screws extend into the groove turned into the holder but do not clamp down on the holder. Wheel bearing grease lubes the ball bearing. (See full description of the construction in the thread by randyc).
; w6 X  J" E3 y; f$ G9 a9 i2 ]The drill blank was ground to the required shape on my old Gorton 375 grinder. The angle on the grinder was set to 2 degrees for clearance on the cutter as it broached the square hole. My plan was to have the tool angle greater than the usual 1 degree angle usually utilized on such tooling. I figured this would give me the "action" I desired.
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  x2 O* |0 @* C$ ^2 G( eThe grinding - start to finish (the brass is a bushing I made to hold 10mm rod in a 1/2" collet):

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The depth of the grind was controlled so that all four faces of the cutter matched.
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: y+ c( U" f; h/ sI decided to try something new on the end or tip grind. Most sources suggest a concave end, randyc indicated that a flat grind will remain sharp longer than concave. I adjusted the tool to be centered on the grinding wheel to grind a curved tip. The theory being that it would be a compromise between a concave and flat grind with all 4 corners being sharp. The approach angle was set to 0 degrees for this grind.

6 M, ^3 E! P7 H; ?& \% x6 QThe final tip grind matches the curvature of the grinding wheel.
A close up of the cutting tip:

* w* E( E( @; F  o# B: `The whole project was now ready for testing on a scrap piece of aluminum. The test was done on my old drill press at slowest speed.
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Notice the three holes. The one at the bottom is just a 1/4" hole.
A countersink was used on the other two holes.
The tool tip was pressed into the countersunk depression to center it then the drill press turned on.
The tool quietly broached its way through the aluminum as hoped.
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. R% b% C8 \  uHere is the result of my first trial - it worked beautifully!
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CDKEY*

回转冲削刀具 BROACHING Tool