【20160406】Kinematic inversion
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1 y2 t, a* H- {! T2 a- N7 zThe cam will be imagined as being stationary.
; p; R) b, H2 E, M5 y4 MThe follower then should be rotated opposite to the direction of cam rotation.9 b, Z; u* Y8 p- o
The desired location for the follower, at several positions, is constructed from the base circle.! _/ J; H3 Z3 b
假定凸轮不动，从动件沿相反方向转动，在基圆上画出从动件的几个预期运动位置。
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To creating the cam shape: wrapping the displacement diagram around the base circle.8 {# _# i1 v) ]
设计凸轮形状时，用从动件位移图上的位移将基圆“包裹”起来。) H% g" z- \3 s7 m
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; n: y" b* M$ J/ T3 u! v% ~. I% E具体例子：0 p: X0 }4 ~- ^$ A: I$ B
① In-Line Knife-Edge Follower 对心直动尖顶从动件凸轮
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# V) R1 Z; i& U1 R1. Draw the base circle of radius.& F/ h: C* @* E+ D& P5 R2 H9 E' [
2. Draw the follower in the home position.8 c: B, D% c4 L% V! j. o3 F) j @, T
3. Draw radial lines from the center of the cam, corresponding to the cam angles identified on the displacement diagram., p- x8 N7 H/ L
4. The follower will be rotated in a direction opposite to the actual cam rotation.
4 G7 [2 j5 A' r0 Q- v) u3 K8 Z5. Transfer the displacements from the displacement diagram to the radial lines.0 ?2 i. G" m# R4 t6 l6 u
6. Measure the displacements from the base circle.
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1.画出制定半径的基圆。
0 q1 ]4 A% _0 P7 Q1 |; r/ I8 O* e2.画出初始位置的从动件。, ~$ J+ R& Q# ^
3.从中心画出基圆的径向线，角度与位移图上横轴凸轮角度相对应。: y: Y% O' `+ R4 y- }# i( ]( c
4.从动件与凸轮真实运动方向相反。
7 @& c: t/ w6 O5 @ K5.将位移移到径向线上。, f0 o+ R5 C2 O+ b
6.测量从动件远离凸轮基圆的距离。
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② Offset Roller Follower 偏置滚轮从动件
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3 x9 V0 r. k( ~! q- Z7 g+ F1. Draw the base circle of radius.
% {* h2 [1 O3 M- ?) g( f2. Draw the follower centerline in the home position.; A" ?4 ]# e9 y6 A+ Z$ b
3. Draw the prime circle.
4 R7 h* q+ y" U- D4. Draw the follower in the home position of radius.
) ~/ O& q! [7 Z$ a" W5. Draw an offset circle of radius, which will be tangent to the follower centerline.
9 T Q! {; D2 }; T* z8 r6. Draw lines tangent to the offset circle, corresponding to the reference cam angles on the displacement diagram.9 a _; B8 o9 A
7. The follower will be rotated in a direction opposite to the actual cam rotation.
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1.画出制定半径的基圆。# n+ W T" v7 m# u
2.画出初始位置的从动件中心线。
5 E8 Z/ C' A6 Q# |: M3.画出理论廓线。' h/ m5 \6 V: F- s( T. m8 k1 E
4.画出初始位置的从动件。. a. G* c! o) G- _! Q6 s( o- ~- j8 N
5.以偏心距为半径画圆，与从动件中心线相切。
! Q! V) {1 a! R2 x6.与偏距圆相切画线，角度与位移图上横轴凸轮角度相对应。6 V" H' j3 v; M% r- q; N4 o# R
7.从动件与凸轮真实运动方向相反。
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楼主: 黑森林的鹿
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楼主
发表于 2016-4-4 21:08:44
这不就比一开始打算的自言自语要求更进一步了嘛】
只不过没人回应的话，每天只是在“机械”地完成自己定下的任务，但是如果知道有人会期待着，自己也会更期待嘛，所以态度也会更认真咯。3 {) I; s5 P" [
