钳工高级工试题
The advanced fitter exam paper
The name
score
1, fill in the blanks
2
Points,
30
Points)
one
The shape of the CAM is summed up in total (disc CAM)
,
(cylindrical CAM) and (block CAM) three kinds.
2
The common CAM curve is (isovelocity curve)
, etc.
Cosine acceleration
Curve of motion) and (sinusoidal acceleration).
3
The lines of large workpieces, commonly used (pull lines and suspension lines) as a reference to the underlining.
4
In large plate splice, the application (via weiyi) is tested, and its precision and efficiency are more than the traditional plate
The process is better.
5
A similar horizontal instrument is used to measure the angular value meter of an artifact in a (horizontal or vertical) position.
6
The offset of the image from a collimator is determined by the reflector, which is not related to the Angle of the reflector.
7
The test of the coaxial error is to find the maximum distance
from the axis of the measured axis (twice the value).
The error of the coaxial degree.
8
The vertical tolerance is used to control the deviation from the (the elements)
90
The degree of degree.
9
In the measurement of plane error, a key question is:
(reference plane) and (minimum inclusive)
The test must be correct.
10
It is used mainly to measure the accuracy of the precision machine tool (the horizontal platform) and the (universal turntable).
11
In assembly process, the method of matching parts (error canceling orientation assembly), eliminating and reducing
assembly
The error can effectively control the assembly accuracy.
12
,
T68
Type horizontal horizontal boring table parts require three precision requirements,
namely
(table turning)
Precision,
(work
Vertical alignment accuracy
Horizontal and vertical (vertical) requirements, otherwise the overall accuracy of the assembly will be affected.
13
The process discipline may be divided into (machining process discipline) and (assembly process discipline) because of its different production content.
Two kinds.
14
In order to guarantee the stability of the rotor at high speed, the rotor (inner or outer circle) should have the shaft neck
Smaller (coaxial error)
It is.
15
Slide bearing due to grease entering the clearance of bearing (no membrane pressure)
So it has (liquid friction
The performance of lubrication.
16
Can be divided into (three watts) by the number of tiles.
,
(5 w type)
,
(6 watts) and other forms.
17
The coupling of high-speed rotating machinery is (rigid coupling) and (semi-flexible coupling).
18
The final purpose of the shaft system is to ensure that the two
rotors are in the normal state of operation.
It is.
19
,
The error of the transmission chain is driven by the driving
parts of the transmission chain
(manufacturing error)
and
(assembly error)
.
20
There are two ways to assess mechanical vibration, namely (bearing vibration) and (axis vibration).
It is.
Two, the judgment problem
one
Points,
20
Points)
one
In the first line, we can draw the processing lines of each surface in the first line
The underlined task of the entire artifact.
(fx)
2
When the marking of special work is crossed, the reasonable selection of the marking, placement and head of the special work is underlined
The key.
3
With the shaft of the multi-watt dynamic bearing, it can rotate in both directions.
(x)
4
When the same precision is applied to the front and back bearings, the neck of the main shaft increases.
(x)
5
The method of measuring the linear degree of the guide line of the machine tool is the method of measuring the line value.
(x)
6
Use the box level to check the line in the vertical plane.
(fx)
7
The unit should be repaired and installed when it is repaired
with a heavy component bed
Place the line after life.
(fx)
8
The main indicator of the rotation accuracy of the main axis is the rotation of the main shaft and the movement of the shaft.
(x)
9
The inclination of the Angle contact bearing roller to cause the neck of the main shaft to move and axial.
(x)
10
,
The external vibration source is derived from various vibrating mechanical devices outside the machine tool,
It passes through the air to the machine tool.
(
X)
11
When the inner circle of the inner ring and the inner hole are eccentric, the axis of the main shaft will be pulsing with radial direction.
(fx)
12
The assembly accuracy of the machine tool is obtained on the dynamic test.
(x)
13
The assembly process card is the technical document that instructs the product assembly work.
(fx)
14
The higher the speed of rotation, the higher the balance accuracy, the greater the eccentricity.
(x)
15
,
Using the test bar to calibrate the parallel of the wire and the guide,
The upper or lower of the test bar in each supporting hole
The direction should be the same.
(fx)
16
In principle, the method of machining of the guide rail can be used as the way of repairing the rail.
(fx)
17
The scraping of the dovetail guides is usually carried out in pairs.
(fx)
18
A work gap is a gap in the position of a bearing during work. Usually, the work is less than the clearance.
(x)
19
,
When the diameter of the two rolling bearings is different,
The diameter of the front bearing should be smaller than the rear bearing.
(fx)
20
No residual measurement is allowed in the rotation after the balance.
(x)
21
The output of the assembled product
,
The assembly process and assembly method of the product will be determined in large measure. (fx)
22
The roughing is to increase the research points and improve the surface quality, so that the shaving surface meets the accuracy requirement. (x)
23
The rotation precision of the main shaft can be improved by the proper clearance of the rolling bearing.
(
Square root
)
24
The lowest category is made up of several separate parts.
(
Square root
)
Third, choice question
one
Points,
20
Points)
one
Machine tool accuracy check
,
The center of the socket is required by the regulation
(A)
Spindle center.
a.
The above
B
. Below
C
. Is equal to the
2
The shaft, which is both supported and transmitted, is also
known as the axis of bending and torsion
(A)
It is.
a.
The rotating shaft
B
The spindle
C
. The drive shaft
3
The precision of the screw is the screw
(C)
It is.
a.
The radial runout
B
The axial channeling move
C
Radial movement and axial movement
4
The method of measuring the straightness error of the longer
parts with self-collimator is part of the method
(B)
Measurement method.
A.
directly
B.
Angle difference
C.
To compare
5
Cause gear noise
The main factors of sound and vibration are
(A)
The speed ratio change.
a.
High frequency.
B
The cycle
C
The short term
6
A standard plate for calibration tools
,
When choosing, its area should be bigger than scraping area
(B)
It is.
a.
.
1/2 B
.
Three quarters of the C
.
one
times
7
,
124.
Bearing inner circle and main shaft,
When the bearing outer ring and the box are assembled,
The directional assembly method is applicable
(C)
It is.
a.
Precision requires a lower spindle
B
The accuracy requires the general spindle
C
High precision requires high spindle
8
In order to eliminate the mounting errors of the rods in each
supporting hole, the installation error of the rods in each supporting hole is used to eliminate the mounting errors of the
rods
Check the stick around
(C)
And then once again, you take the average.
a.
.
60
?
90 B.
?
180 C.
?
9
If there is a linear degree of error in the guide rail of
horizontal lathe, the lathe bed is allowed only
(B)
In order to prolong the orbit life.
a.
Concave in.
B
Punch in.
C
Tilt the.
10
In the case of the liquid dynamic bearing work, the shaft can
float in the oil in order to balance the load of the shaft.
C
).
a.
Have enough oil supply pressure
B.
There is some pressure difference
C.
It has a certain rotation speed
11
The establishment of pressure of the oil membrane of the static
bearing is dependent on (
B
) to be sure.
A.
Rotation speed
B.
Oil supply pressure
C.
The load size
12
The roller bearing with large load and high speed is used for
pre-loading ().
A.
larger
B.
smaller
C.
Do not use
13
The accuracy of the pair of screw nuts and nuts is often used.
C
) the gap.
a.
The axial
B.
The normal
C.
The radial
14
To correct the coaxial degree with the center supporting screw nut,
In order to consider the deflection of the screw, the center branch
Correction of the position of the socket center should be slightly (
B
) at both ends.
a.
The above
B
. Below
C
. Is equal to the
15
The surface of lathe bed is hard.
a.
The hardness of the slide guide.
a.
The above
B
. Below
C
. Is equal to the
16
The main factor that causes the thermal deformation of the machine is the surface layer of the machine.
a.
).
a.
Temperature difference.
B
Stress.
C
The frictional heat
17
In order to minimize the vibration of the machine, the length of the belt should be as long as possible when driving with multiple transmission belt.
B
)
a.
Have scalability
B
Equal.
C
Range.
18
After the lathe is assembled, the purpose of the cutting test
is to examine the main shaft system of the lathe.
B
) performance.
a.
Cutting.
B
The vibration-proof
C
Load.
19
It is used to measure the accuracy of spindle and stern of lathe
(B)
It is.
a.
The level
B
Micrometer and test stick
C
The micrometer
20
When the shaving surface of the workpiece is less than the flat
surface, it is best to push the research
(B)
It is.
a.
. Beyond the tablet
B
Not beyond the plate
C
Above or above the plate
21
The error that the process system does not adjust to the correct
position is called
(A)
It is.
A.
Adjust the error
B.
Assembly error
C.
The machining error
22
The static pressure bearing is on the surface of the hydrostatic
axis
(C)
Symmetrical and evenly distributed oil Chambers and return
tanks
Sealing surface.
a.
Three.
B
Two.
C
Four.
23
The rear axle of the supporting machine and the main shaft
(B)
The error is the relative tilt of the inner and outer ring of the bearing.
a.
Parallelism.
B
The coaxial degree
C
Position. The degree of
24
The geometrical error of machine tool includes manufacturing error and assembly error
(A)
Error.
A.
Wear and tear
B.
debugging
C.
operation
Four, short answer (
5
points
/
The topic,
20
Points)
one
,
us
Why is a horizontal plane measuring more than a frame level,
and the accuracy is high?
P52
2
,
flat
How many ways to splice?
P16
3
,
Reduction of
What are the methods of less forced vibration?
P156
4
,
how
Sample test rotor bending value?
P131
5
,
Such as
How to identify the quality of process discipline?
P72
Fifth, the essay question
10
Points)
one
,
try
The finishing process of the worm is described.
P132
2
,
big
What method should be used when the type of workpiece cannot
be underlined on the splicing board?
P16