毕业论文英文答辩(CRANE)

the most unfavorable working conditions
against overturning
the intensity of a certain
Ⅲ
safety device against the storm blow away
none working state
MARGIN of SAFETY 1.5
.
Tendency
.
2. The shortage of the domestic cranes
The performance of products and development ability is weak;
The level of manufacturing technology is low;
The product detection level is not high; The fittings supply is insufficient and the
quality is poor; The update of product technology standard
is lag and is lack of executive force.
Areas: SL = 48976 mm2
Moment of inertia:
I =
x
1 1 5 0 0 1 8 0 0 2 1 1 4 8 6 1 7 8 4 2 2 .1 7 6 1 0 7 m m 3
6
6
I =
y
1 1 8 0 0 1 5 0 0 3 1 1 7 8 4 1 4 8 6 3 1 .8 4 2 1 0 1 0 m m 4
structure
H=12m Vc=45m/min
average A5 single boxes and
double beams
Lifting speed
running speed of big vehicle
Classification grade
of mechanism
material
v=10m/min v=42m/min
The Design of the Overall and A Type of
Door Frame of 60 Tons Gantry Crane
speaker：xxx
.
The Main Contents
the basis of the paper the research contents the research methods summary and outlook
The hinge type of legs is two rigid legs.
.
4. Design the Dimensions
The determination of main girder geometry size.
1500
8
1800
8
8
.
6
Geometric Features of Girders
1.33
1.15
.
3．Confirming A Preliminary Scheme
The door frame: type A legs, single box ,double beams structure.
The height of main girder is H =15 m, the span is L= 30m.
.
The Research Contents
The Design of the Overall and A Type of Door Frame of 60 Tons Gantry Crane. Determining the overall design, including the door height, the main girders span, gate leg type and basic size, etc. Calculating the strength of components or structure of the crane , then checking the strength and stability.
M5 Steel structure
.
2.The Type of Load
TYPE
CONTENTS
WORKING CONDITIONS
Ⅰ fatigue, wear and heat load the general working conditions
Ⅱ
static strength, the stability of the local mechanisms stability and stability
1 2
1 2
Section modulus：
Байду номын сангаас
W =
x
1 1 5 0 0 1 8 0 0 2 1 1 4 8 6 1 7 8 4 2 2 .1 7 6 1 0 7 m m 3
.
the research methods
1. The design parameters
elevating capacity
Q=60t
type of door leg
A
lifting altitude
running speed of little vehicle Classification
grade of the whole machine
.
The Basis of The Paper
1. The Development of Crane
In recent years, the role of the lifting transportation machinery is beyond the scope of auxiliary equipment due to the continuous development of industrial technology. And then this machinery has been directly used in the production process. It has been the main parts of the assembly line.