毕业设计机械类外文翻译

率低，加工质量差。 在发动机缸体深油孔的加工中，采用枪钻工艺；

（

）三轴孔的加工

三 轴孔的加工为缸体孔系加工中精度要求高，工时长

的限制性工序。因此，工序安排、加工 方法、刀具等都应该特别注意。合盖前加

工，既缸体半圆孔和主轴承盖得加工，其主要目 的是去除毛坯余量、释放应力，

为后序加工做准备；

在加工中心 上加工曲轴孔时，

采用双面镗孔，

先在曲轴孔一

段端镗孔到

1/2

长度时，然后工作台回转

度，从另外一端再镗另一

1/2

（

5

）缸孔的加工

缸孔的加工时缸体机械加工中的关 键工序之一，一般情

况下，其加工工艺过程为粗镗、半精镗、精镗和珩磨。为及早发现缸 孔内壁的铸

造缺陷，消除应力，应尽量提前粗镗缸孔；由于缸孔的结构特点不同，需采用 珩

磨工艺，

以提高缸孔表面质量。

在大 批量生产中，

缸孔的珩磨一般采用多轴珩磨

机或珩磨自动线。< /p>

再次我们采用珩磨自动线，

由粗珩、

精珩 和检测三台设备组成；

（

6

）清洗

清洗分为湿式清洗和干式清洗。缸体机械加工自动生产线采用

大 流量湿式清洗；

（

7

）检测

检测分为在线检测和线外检测两种。在发动机缸体的质量检测

中 ，根据实际情况采用线外检测，主要采用三坐标测量机对缸体进行综合测量，

每

200

件抽查

1-5

件 ，每班抽查一件。

4.

小结

通过对发动机缸体的结构和工艺 特点进行分析，

论述了发动机缸体机械加工

工艺方案的原则和依 据以及切削用量的选择，

并以高速铣削和调头镗孔为例，

设

计、

分析了发动机缸体的高速铣削和调头镗孔工艺过程，

问题。

Cylinder block machining process design

Engine parts engine block is a more complex structure of spare parts box, its high

precision,

complex

process,

and

the

processing

quality

will

affect

the

overall

performance engine, so it has become the engine manufacturer's focus parts one.

cal Characteristics of the engine cylinder block

Cylinder

cast

for

a

whole

structure,

and

its

upper

part

4

cylinder

mounting

hole;

cylinder

standard

cylinder

is

divided

into

upper

and

lower

divisions

into

two

parts;

cylinder

to

the

rear

of

the

front-side

arrangement

of

the

previous

three

coaxial

mounting hole of the camshaft and the idler axle hole.

Cylinder

process

features

are:

the

structure

of

complex

shape;

processing

plane,

more

than

holes;

uneven

wall

thickness

and

stiffness

is

low;

processing

of

high

precision typical of box-type processing part. The main processing of the surface of

cylinder

block

top

surface,

the

main

bearing

side,

cylinder

bore,

the

main

and

camshaft

bearing

bore

holes

and

so

on,

they

will

directly

affect

the

machining

accuracy of the engine assembly precision and performance, mainly rely on precision

equipment,

industrial

fixtures

reliability

and

processing

technology

to

ensure

the

reasonableness.

block process design principles and the basis for

Design Technology program should be to ensure product quality at the same time,

give

full

consideration

to

the

production

cycle,

cost

and

environmental

protection;

based

on

the

enterprises

ability

to

actively

adopt

advanced

process

technology

and

equipment, and constantly enhance their level of technology. Engine block machining

process design should follow the following basic principles:

(1)

The

selection

of

processing

equipment

,the

principle

of

selection

adopted

the

principle

of

selection

adopted

the

principle

of

combining

rigid-flexible,

processing

each

horizontal

machining

center

is

located

mainly

small

operations

with

vertical

machining

center,

the

key

process

a

crank

hole,

cylinder

hole,

balancer

shaft

hole

High- speed

processing

of

high-precision

horizontal

machining

center,

an

upper

and

lower

non-critical

processes

before

and

after

the

four-dimensional

high- efficiency

rough milling and have a certain adjustment range of special machine processing;

(2) focus on a key process in principle process the body cylinder bore, crankshaft

hole, Balance Shaft hole surface finishing and the combination of precision milling

cylinder head, using a process focused on a setup program to complete all processing

elements in order to ensure product accuracy The key quality processes to meet the

cylinder capacity and the relevant technical requirements;

According to the technological characteristics of automobile engine cylinder block

and the production mandate, the engine block machining automatic production line is

composed

of

horizontal

machining

center

CWK500

and

CWK500D

machining

centers,

special

milling/boring

machine,

vertical

machining

centers

matec-30L

and