『壹』 lead throughs 机械中什么意思
铅名车贯
望学习进步,事业顺心。不明白的可以继续问哦!(*^__^*)
『贰』 在机械元件图纸上4-M3 THROUGH是什么意思
4是指个数,M是指直径,3指3毫米
机械制图是用图样确切表示机械的结构形状、尺寸大小、工作原理和技术要求的学科。图样由图形、符号、文字和数字等组成,是表达设计意图和制造要求以及交流经验的技术文件,常被称为工程界的语言。另外机械制图也是大多高等院校机械类及相关专业开设的一门基本必修课程之一。
『叁』 机械制图中的英文“thru”是什么意思
贯穿的意思,
『肆』 机械图纸D&T1/8''B.S.P代表什么意思
具体图纸上传看看,结合图纸更容易理解!D的意思应该是drill(钻)缩写,T的意思应该是through(通过、透过),D&T综合意思就是“钻通或钻透“的意思。
BSP是英制管螺纹总代号(全称British Standard Pipe),八分之一寸的锥或管螺纹!
国内相当于圆柱管螺纹G1/8"或圆锥管螺纹ZG1/8",具体是锥还是圆得根据装配需求仔细的确认。
若有用忘采纳!
『伍』 机械专业英语翻译成中文(急)
3.1.2
Friction
3.1.2
磨擦
Whenever
there
is
a
relative
motion
between
two
touching
surfaces,
there
is
a
resistance
to
this
motion
called
friction.
当两个接触的表面之间存在
相对运动
时,对这一运动就有一种称为磨擦的阻力。The
mechanics
of
friction
are
complex.
摩擦的机理很复杂。Although
the
fundamentals
of
the
phenomenon
have
been
given
much
study,
very
little
that
is
known
would
facilitate
formulation
of
the
exact
functional
relationship
between
friction
and
the
other
process
variables
.
虽然这一现象的基本原理已由很多研究所提供,但已知很少有助于在磨擦和其他工艺变量之间形成准确的
函数关系
。The
most
common
simplifying
assumptions
made
with
regard
to
friction
stress
(J)
between
the
workpiece
and
the
tool
are
the
following
:
关于工件和工具之间的磨擦应力(J)所做的最常用的简化假设如下:
1.
Coulomb
Friction.
It
is
assumed
that
the
shear
stress
J
is
proportional
to
the
pressure
p
between
the
workpiece
and
the
die.
Then
J
=
μp,
where
the
proportionality
factor
μ
is
called
the
Coulomb
coefficient
of
friction.
1.
库伦
磨擦。它假设
剪切应力
J与工件和模具之间的压力p成正比。于是J=μp,式中的
比例因子
μ被称为库伦磨擦系数
2.
Constant
friction.
It
is
assumed
that
the
shear
stress
is
proportional
to
the
strength
of
the
workpiece
material.
Then
τ
=
m/√3,
where
the
proportionality
factor
m
is
called
the
shear
factor,
with
0
<
m
<
1.
The
factors
μ
and
m
are
assumed
constant
for
a
given
die,
workpiece
and
lubricant.
2.
恒定的磨擦。它假设剪切应力正比于工件材料的强度。于是,T=m/√3,式中的比例因子m被称为剪切因子,0
<
m
<
1。因子μ和m对于给定的模具、工件和润滑剂而言都被假设为常数。
3.
Hydrodynamic,
Hydrostatic,
and
Thick
Film
Lubrication.
When
a
lubricant
film
separates
the
workpiece
from
contact
with
the
die,
then
hydrodynamic
or
hydrostatic
film
lubrication
prevails
together
with
its
special
laws
of
shear
within
the
lubricant
medium.
Sometimes
high-
viscosity
lubricants
adhere
to
the
workpiece
to
form
similarly
thick
film
separation
of
the
workpiece
from
the
tool.
Film
lubrication
may
separate
the
workpiece
from
the
die
on
the
entry
side
to
a
smaller
or
larger
extent.
At
the
extreme
(Sec.
7),
the
entire
workpiece
is
separated
from
the
die
by
this
film
of
the
lubricant.
3.
流体动力润滑、静压润滑和厚油膜润滑。当一层润滑剂膜将工件与接触的模具隔离时,那么流体动力的或静压的油膜润滑,以及其在润滑剂介质中特殊的剪切定律就会占上风。有时,高粘度润滑剂黏结到工件上,形成工件与工具类似厚油膜的隔离。油膜润滑可以在入口侧将工件与模具以较小或较大的程度隔离。在极端情况下(第7节),整个工件就被此润滑剂膜与模具隔离开来。
『陆』 THRU在机械制图里是什么意思
THRU表示通的意思,如通孔、通槽。
通孔:Plating Through Hole 简称 PTH,这是最常见到的一种,你只要把PCB拿起版来对着灯光,权可以看到亮光的孔就是「通孔」。这也是最简单的一种孔,因为制作的时候只要使用钻头或雷射直接把电路板做全钻孔就可以了,费用也就相对较便宜。可是相对的,有些电路层并不需要连接这些通孔,比如说我们有一栋六层楼的房子,我买了它的三楼跟四楼,我想要在内部设计一个楼梯只连接三楼跟四楼之间就可以,对我来说四楼的空间无形中就被原本的一楼连接到六楼的楼梯给多用掉了一些空间。所以通孔虽然便宜,但有时候会多用掉一些PCB的空间。
『柒』 through和go through的区别
through和go through的区别
(1)through 和 go through 表示“通过(某地、议案等);用完”时可互换使用。
如: The man was so fat that he couldn’t get/go through the door.那人胖得连那扇门都过不去。
The plan for this term will have to get/go through the leading group of the school.本学期计划得经校领导班子通过。
I have got/gone through three pairs of shoes in a month.这一个月内我穿坏了三双鞋。
(2)through 和 go through又各有其意义:
through:通过考试;接通电话
I got through everything except English .除英语外我别的都及格了。
I can’t through to Beijing. The line is busy.我打不通北京的电话,占线。
go through:检查;看一遍;经历(困难,痛苦)
I went through my homework to make sure that nothing had been missed.
我将作业检查了一遍,以确定什么都没有漏掉。
Go through the text from the beginning .把课文从头看一遍。
She must have gone through a lot.她一定吃了不少苦。
『捌』 机械图纸33.00thr是什么意思
thr多数指英文单词through,机械上理解为贯穿的意思。
你看一下33.00是不是孔一类的标注。
供参考
『玖』 across和through有什么区别goacross和g
across,cross是横过的意思
across是介词,通常在用go,run,swim.等搭配
cross是动词,通常可以直接放在句子中
through是穿过
跟across一样介词,通常在用go,run,swim.等搭配
through与cross的不同在于方向
through是直过cross是横过 例:
I went across the road = I cross the road
我横过马路(经斑马线)
The car went through the road
汽车经过马路(沿着马路)