JB/T 2523.4-1999 This standard is a revision of ZB J53 007-88 "Precision of floor-standing lathes". During the revision, only editorial changes were made, and the main technical content remained unchanged. This standard is part of the JB/T 2523 "Floor-standing lathe" series of standards, which includes the following four parts: JB/T 2523.1-1997 Technical conditions for floor-standing lathes JB/T 2523.2-1999 Parameters of floor-standing lathes JB/T 2523.3-1999 Series of floor-standing lathes JB/T 2523.4-1999 Precision inspection of floor-standing lathes This standard specifies the requirements and inspection methods for the geometric accuracy and working accuracy of floor-standing lathes. This standard applies to general-purpose floor-standing lathes with a maximum workpiece rotation diameter of 1600~8000mm in the pit and a maximum workpiece length of 2000~4000mm between the centers. It also applies to general-purpose floor-standing lathes without pits. This standard was first issued in 1960, revised for the first time in 1979, and revised for the second time in 1988. JB/T 2523.4-1999 Floor-standing Lathe Precision Inspection JB/T2523.4-1999 Standard Download Decompression Password: www.bzxz.net

ICS25.080.10
Machinery Industry Standard of the People's Republic of China
JB/T2523.4—1999
Floor-type lathe
Published on 1999-05-20
Precision Inspection
Implemented on 2000-01-01
State Bureau of Machinery Industry
JB/T2523.4—1999
This standard is a revision of ZBJ53007-88 "Floor-type lathe precision". During the revision, only editorial changes were made according to relevant regulations. The technical content has not changed.
This standard This standard is part of the JB/T2523 series of standards for floor-standing lathes, which includes the following four parts: JB/T2523.1—1997
JB/T2523.2—1999
JB/T2523.3—1999
Technical conditions for floor-standing lathes
Floor-standing lathes
Floor-standing lathes
Series of models
JB/T2523.41999
Precision inspection of floor-standing lathes
This standard replaces ZBJ53007—88 from the date of implementation. This standard is proposed by the National Technical Committee for Standardization of Metal Cutting Machine Tools. This standard is under the jurisdiction of the Heavy Machine Tool Branch of the National Technical Committee for Standardization of Metal Cutting Machine Tools. The responsible drafting unit of this standard is Qiqihar No. 1 Machine Tool Factory. The drafting units of this standard are: Qinghai Heavy Machine Tool Factory and Wuhan Heavy Machine Tool Factory. This standard was first issued in 1960, revised for the first time in 1979, and revised for the second time in 1988. 1
1 Scope
Standard of the Machinery Industry of the People's Republic of China
Precision Inspection of Floor-type Lathes
This standard specifies the requirements and inspection methods for the geometric accuracy and working accuracy of floor-type lathes. JB/T2523.4-1999
Replaces ZBJ53007-88
This standard is applicable to floor-type lathes for general use with a maximum workpiece rotation diameter of 1600-8000mm in the pit and a maximum workpiece length of 2000~4000mm between the top and the bottom. It is also applicable to floor-type lathes for general use without pits. 2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard by reference in this standard. When this standard was published, the versions shown were all valid. All standards are subject to revision. Parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T1182—1996
General rules, definitions, symbols and drawing representations for shape and position tolerances GB/T17421.1-1998 General rules for machine tool inspection Part 1: Geometric accuracy of machine tools under no-load or finishing conditions 3 General requirements
Refer to 3.1 in GB/T17421.1-1998 to adjust the installation level. Place a level on the four corners of the working surface of the base plate. The readings of the level in the longitudinal and transverse directions shall not exceed 0.04/1000. 3.2 The pre-adjustment inspection is only carried out during the assembly process, and no re-inspection is carried out after the load test. 3.3 During the inspection, the actual inspection order can generally be arranged according to the requirements of the assembly and disassembly inspection tools, inspection convenience, and thermal inspection items. 3.4 During the working accuracy inspection, the inspection of the test piece should be carried out after fine turning. 3.5 When the measured length is different from the length specified in this standard, the tolerance shall be converted according to the measurable length in accordance with the provisions of 2.3.1.1 of GB/T17421.11998. When the conversion result is less than 0.005mm, it shall still be calculated as 0.005mm. 3.6 The direction parallel to the spindle axis is called the longitudinal direction, and the direction perpendicular to the spindle axis is called the transverse direction. Approved by the State Bureau of Machinery Industry on May 20, 1999 and implemented on January 1, 2000
4 Pre-adjustment inspection
Inspection items
Flatness of base plane
plate working surface
≤4000
~10000
>10000
~16000
Local tolerance:|| tt||On any 500 measuring length
Inspection tools
Level
Equal height gauge blocks
Inspection method
Refer to the relevant provisions of GB/T17421.1-1998 5.2;5.3
Put two equal height gauge blocks 500mm apart in the longitudinal and transverse directions on the working surface, put a flat ruler on the gauge blocks, and put a level on the flat ruler. Move the gauge to the front, middle and back positions in the longitudinal direction and the left, middle and right positions in the transverse direction, record the reading every 500mm, and inspect the entire length. And draw six longitudinal and transverse error curves respectively.
The error is calculated as the maximum value of the maximum algebraic difference of the coordinate values ​​between the connecting lines of the two end points of each curve; the local error is calculated as the maximum value of the maximum algebraic difference of the coordinate values ​​between the connecting lines of the two end points of each curve at any local measuring length.
JB/T2523.4-
5 Geometric accuracy inspection
1) D represents the maximum workpiece length (the same below) Inspection items
a Slide
movement Straightness
in the vertical plane
movement Parallelism in the vertical plane ≤ 2000
Flat or convex
Local tolerance:
0.040/1000 on any 500 measuring length
Inspection tool
Level
Level
Inspection method
Refer to the relevant provisions of GB/T17421.1-1998 5.2.1.2.2
Put a level in the longitudinal direction near the front guide rail on the slide. Move the slide, record the reading every 500mm, and inspect it over the full stroke. And draw the error curve of the guide rail.
The error is calculated as the maximum algebraic difference between the coordinates of the curve and the line connecting the two end points: the local error is calculated as the maximum algebraic difference between the coordinates of the two points on any local measurement length and the line connecting the two end points of the curve
(You can also put the level directly on the guide rail for inspection)
5.4.1.2.7
Put a level horizontally on the upper edge of the slide. Move the filling plate, record the reading every 500mm, and inspect it over the full stroke.
The error is measured by the maximum algebraic difference of the level reading (the level can also be placed on a special inspection fixture and moved on the guide rail for inspection)
JB/T2523.4-
Inspection items
The straightness of the slide in the horizontal
plane≤2000
Local tolerance:
On any 500 measuring length
Inspection tools
Microscope
Indicator
Inspection method
Refer to the relevant provisions of GB/T17421.1-1998 5.2.1.2.3;5.2.3.2.1
At the center height of the machine tool, tighten a steel wire in the longitudinal direction and fix the microscope on the slide. Adjust the steel wire so that the microscope readings are equal at both ends of the steel wire. Move the slide, record the reading every 500mm, and check on the full stroke.
The error is calculated as the maximum algebraic difference of the microscope readings: the local error is calculated as the maximum algebraic difference of the readings at two points on any local measuring length.
You can also put the ruler on a special bracket, fix the indicator on the slide so that its probe touches the inspection surface of the ruler, adjust the ruler so that the indicator readings are equal at both ends of the ruler, and move the slide to check
JB/T2523.4-
Inspection items
Slide movement
Parallelism of the guide groove of the tailstock
Axial play of the spindle
On any 1000 measuring length is|| tt||≤2500
1) D represents the maximum rotation diameter of the workpiece in the pit. If there is no pit, it refers to the maximum rotation diameter on the base plate (the same below) Inspection tool
Indicator
Indicator
Inspection rod
Inspection method
Refer to the relevant provisions of GB/T17421.1-19985.4.2.2.2.2
Fix the indicator on the slide so that its probe touches the side of the tailstock guide groove, and move the slide for inspection. The error is measured by the maximum difference of the indicator reading (the bed is allowed to be fixed at the position closest to the tailstock guide groove for inspection)
5.6.2.1.2;5.6.2.2.2
Insert a test rod into the spindle taper hole. Fix the indicator so that its probe touches the surface of the steel ball in the center hole of the test rod. Rotate the spindle for inspection.
The error is measured by the maximum difference in indicator readings JB/T2523.4-
Inspection items
Radial run-out of the
taper hole axis of the tailstock spindle:
a close to
spindle end face;
b 500
from the
shaft end face (only applicable to
turnable tailstock spindle
radial run-out of the
spindle taper hole axis:
spindle end face:
b 500
≤2500
≤2500
Inspection tools
indicator
inspection stick
indicator
inspection stick||t t||Testing method
Refer to the relevant provisions of GB/T17421.1-1998 5.6.1.2.3
Insert a test rod into the tapered hole of the tailstock spindle. Fix the indicator so that its probe touches the surface of the test rod: a. Close to the end face of the spindle; b. 500mm away from the spindle face. Rotate the spindle for testing. Pull out the test rod, rotate 90 degrees, reinsert it, and test three times in sequence. Calculate the errors a and b separately. The error is calculated as the average of the four measurement results.
Testing is required in both the vertical plane and the horizontal plane 5.6.1.23
Insert a test rod into the tapered hole of the spindle. Fix the indicator so that its probe touches the surface of the test rod: a. Close to the end face of the spindle; b. 500mm away from the end face of the spindle. Rotate the spindle Inspection. Pull out the inspection rod, rotate 90 degrees, reinsert and inspect three times in sequence.
a, b ​​errors are calculated separately. The error is calculated as the average of four measurement results.
Inspection is required in both vertical and horizontal planes JB/T2523.4-
Inspection items
Parallelism of slide movement to main shaft
axis:
In straight plane:
In plane
Radial runout of top
≤2500
On 500 measuring length
a Only upward deviation is allowed
b Only forward deviation is allowed
≤2500
Inspection tools||tt| |Indicator
Test rod
Indicator
Special center
Test methodwwW.bzxz.Net
Refer to the relevant provisions of GB/T17421.1-19985.4.2.2.3
Insert a test rod into the spindle taper. Fix the indicator on the slide so that its probe touches the surface of the test rod: a. In the vertical plane; b. In the horizontal plane. Move the slide to test. Rotate the spindle 180° and check again. Calculate the errors of a and b respectively. The error is calculated as half of the algebraic sum of the two measurement results
5.6.1.2.2;5.6.2.1.2
Insert a center into the spindle taper. Fix the indicator so that its probe touches the cone surface of the center vertically. Rotate the spindle to test.
The error is calculated by dividing the maximum difference of the indicator reading by cosα (α is the cone half angle)
JB/T2523.4-
Inspection items
The end face runout of the faceplate
The parallelism of the slide movement to the tailstock
spindle axis
:
aIn the vertical plane:
In the plane
≤2500| |tt||≤2500
On the measuring length of 500
a Only upward deviation is allowed
b. Only forward deviation is allowed
Inspection tool
Indicator
Indicator
Inspection rod
Inspection method
Refer to the relevant provisions of GB/T17421.1-19985.6.3.2
Fix the indicator so that its probe touches the rear edge of the faceplate end face. Rotate the faceplate for inspection.
The error is measured by the maximum difference of the indicator readings5.4.2.2.3
The tailstock sleeve is withdrawn into the tailstock hole and locked. Insert a test rod into the tapered hole of the tailstock spindle. Fix the indicator on the slide so that its probe touches the surface of the test rod: a. In the vertical plane: b. In the horizontal plane. Move the slide for inspection. Rotate the spindle 180° (or pull out the test rod, rotate it 180° and reinsert it) and check again.
Calculate the errors of a and b respectively. The error is calculated as half of the algebraic sum of the two measurement results
JB/T2523.4-
Inspection items
Equal heights of spindle and
tailstock center
Vertical slide
Movement parallel to the guide rail
surface on the bed
table
≤2500
The tailstock height is only allowed to be 0.040 over a measuring length of 300
Inspection tools
Indicator
Inspection rod
Indicator
Inspection method
Refer to the relevant provisions of GB/T17421.1-1998 5.4.3.2.1
The tailstock sleeve is withdrawn into the tailstock hole and locked. Place a test rod of not less than 1500mm in length between the spindle and the tailstock center (or insert a test rod of equal diameter into the taper hole of the spindle and the tailstock spindle). Fix the indicator on the slide so that its probe touches the surface of the test rod in the vertical plane. The error of moving the slide to check is measured by the difference between the indicator readings at both ends of the test rod.
5.4.2.2.2.2
Fix the indicator on the longitudinal slide so that its probe touches the guide rail surface on the bed. Move the longitudinal slide to check. The error is measured by the maximum difference of the indicator readings. JB/T2523.4-
Inspection items
Horizontal slide
Movement perpendicular to the guide rail on the bed
Table
Horizontal slide
Movement parallel to the guide rail on the bed
Table
0.020/300
Only allowed to deviate toward the faceplate
On the 300 measuring length
Inspection tools
Indicator
Indicator
Inspection method
Refer to the relevant provisions of GB/T17421.1-1998 5.5.2.2.2
Put a square on the guide rail surface on the bed side. Fix the indicator on the horizontal slide so that its probe touches the square inspection surface. Move the horizontal slide to inspect.
The error is measured by the maximum difference in the indicator readings 5.4.2.2.2
Place a ruler horizontally on the guide rail surface of the bed. Fix the indicator on the horizontal slide so that its probe touches the inspection surface of the ruler. Move the horizontal slide to inspect.
The error is measured by the maximum difference in the indicator readings JB/T2523.4-14-
Inspection items
Parallelism of slide movement to spindle
axis line:
In straight plane:
In plane
Radial run-out of center
≤2500
In 500 measuring length
a Only upward deviation is allowed
b Only forward deviation is allowed
≤2500
Inspection tools
Indicator
Inspection rod
Indicator
Special center
Inspection method
Refer to the relevant provisions 5.4.2.2.3 of GB/T17421.1-1998
Insert a inspection rod into the spindle taper hole. Fix the indicator on the slide so that its probe touches the surface of the test rod: a. In the vertical plane; b. In the horizontal plane. Move the slide to test. Rotate the spindle 180° and check again. Calculate the errors of a and b respectively. The error is calculated as half of the algebraic sum of the two measurement results
5.6.1.2.2;5.6.2.1.2
Insert a center point into the spindle taper hole. Fix the indicator so that its probe touches the center point taper vertically. Rotate the spindle to test.
The error is calculated by dividing the maximum difference of the indicator reading by cosα (α is the cone half angle)
JB/T2523.4-
Inspection items
The end face runout of the faceplate
The parallelism of the slide movement to the tailstock
spindle axis
:
aIn the vertical plane:
In the plane
≤2500| |tt||≤2500
On the measuring length of 500
a Only upward deviation is allowed
b. Only forward deviation is allowed
Inspection tool
Indicator
Indicator
Inspection rod
Inspection method
Refer to the relevant provisions of GB/T17421.1-19985.6.3.2
Fix the indicator so that its probe touches the rear edge of the faceplate end face. Rotate the faceplate for inspection.
The error is measured by the maximum difference of the indicator readings5.4.2.2.3
The tailstock sleeve is withdrawn into the tailstock hole and locked. Insert a test rod into the tapered hole of the tailstock spindle. Fix the indicator on the slide so that its probe touches the surface of the test rod: a. In the vertical plane: b. In the horizontal plane. Move the slide for inspection. Rotate the spindle 180° (or pull out the test rod, rotate it 180° and reinsert it) and check again.
Calculate the errors of a and b respectively. The error is calculated as half of the algebraic sum of the two measurement results
JB/T2523.4-
Inspection items
Equal heights of spindle and
tailstock center
Vertical slide
Movement parallel to the guide rail
surface on the bed
table
≤2500
The tailstock height is only allowed to be 0.040 over a measuring length of 300
Inspection tools
Indicator
Inspection rod
Indicator
Inspection method
Refer to the relevant provisions of GB/T17421.1-1998 5.4.3.2.1
The tailstock sleeve is withdrawn into the tailstock hole and locked. Place a test rod of not less than 1500mm in length between the spindle and the tailstock center (or insert a test rod of equal diameter into the taper hole of the spindle and the tailstock spindle). Fix the indicator on the slide so that its probe touches the surface of the test rod in the vertical plane. The error of moving the slide to check is measured by the difference between the indicator readings at both ends of the test rod.
5.4.2.2.2.2
Fix the indicator on the longitudinal slide so that its probe touches the guide rail surface on the bed. Move the longitudinal slide to check. The error is measured by the maximum difference of the indicator readings. JB/T2523.4-
Inspection items
Horizontal slide
Movement perpendicular to the guide rail on the bed
Table
Horizontal slide
Movement parallel to the guide rail on the bed
Table
0.020/300
Only allowed to deviate toward the faceplate
On the 300 measuring length
Inspection tools
Indicator
Indicator
Inspection method
Refer to the relevant provisions of GB/T17421.1-1998 5.5.2.2.2
Put a square on the guide rail surface on the bed side. Fix the indicator on the horizontal slide so that its probe touches the square inspection surface. Move the horizontal slide to inspect.
The error is measured by the maximum difference in the indicator readings 5.4.2.2.2
Place a ruler horizontally on the guide rail surface of the bed. Fix the indicator on the horizontal slide so that its probe touches the inspection surface of the ruler. Move the horizontal slide to inspect.
The error is measured by the maximum difference in the indicator readings JB/T2523.4-14-
Inspection items
Parallelism of slide movement to spindle
axis line:
In straight plane:
In plane
Radial run-out of center
≤2500
In 500 measuring length
a Only upward deviation is allowed
b Only forward deviation is allowed
≤2500
Inspection tools
Indicator
Inspection rod
Indicator
Special center
Inspection method
Refer to the relevant provisions 5.4.2.2.3 of GB/T17421.1-1998
Insert a inspection rod into the spindle taper hole. Fix the indicator on the slide so that its probe touches the surface of the test rod: a. In the vertical plane; b. In the horizontal plane. Move the slide to test. Rotate the spindle 180° and check again. Calculate the errors of a and b respectively. The error is calculated as half of the algebraic sum of the two measurement results
5.6.1.2.2;5.6.2.1.2
Insert a center point into the spindle taper hole. Fix the indicator so that its probe touches the center point taper vertically. Rotate the spindle to test.
The error is calculated by dividing the maximum difference of the indicator reading by cosα (α is the cone half angle)
JB/T2523.4-
Inspection items
The end face runout of the faceplate
The parallelism of the slide movement to the tailstock
spindle axis
:
aIn the vertical plane:
In the plane
≤2500| |tt||≤2500
On the measuring length of 500
a Only upward deviation is allowed
b. Only forward deviation is allowed
Inspection tool
Indicator
Indicator
Inspection rod
Inspection method
Refer to the relevant provisions of GB/T17421.1-19985.6.3.2
Fix the indicator so that its probe touches the rear edge of the faceplate end face. Rotate the faceplate for inspection.
The error is measured by the maximum difference of the indicator readings5.4.2.2.3
The tailstock sleeve is withdrawn into the tailstock hole and locked. Insert a test rod into the tapered hole of the tailstock spindle. Fix the indicator on the slide so that its probe touches the surface of the test rod: a. In the vertical plane: b. In the horizontal plane. Move the slide for inspection. Rotate the spindle 180° (or pull out the test rod, rotate it 180° and reinsert it) and check again.
Calculate the errors of a and b respectively. The error is calculated as half of the algebraic sum of the two measurement results
JB/T2523.4-
Inspection items
Equal heights of spindle and
tailstock center
Vertical slide
Movement parallel to the guide rail
surface on the bed
table
≤2500
The tailstock height is only allowed to be 0.040 over a measuring length of 300
Inspection tools
Indicator
Inspection rod
Indicator
Inspection method
Refer to the relevant provisions of GB/T17421.1-1998 5.4.3.2.1
The tailstock sleeve is withdrawn into the tailstock hole and locked. Place a test rod of not less than 1500mm in length between the spindle and the tailstock center (or insert a test rod of equal diameter into the taper hole of the spindle and the tailstock spindle). Fix the indicator on the slide so that its probe touches the surface of the test rod in the vertical plane. The error of moving the slide to check is measured by the difference between the indicator readings at both ends of the test rod.
5.4.2.2.2.2
Fix the indicator on the longitudinal slide so that its probe touches the guide rail surface on the bed. Move the longitudinal slide to check. The error is measured by the maximum difference of the indicator readings. JB/T2523.4-
Inspection items
Horizontal slide
Movement perpendicular to the guide rail on the bed
Table
Horizontal slide
Movement parallel to the guide rail on the bed
Table
0.020/300
Only allowed to deviate toward the faceplate
On the 300 measuring length
Inspection tools
Indicator
Indicator
Inspection method
Refer to the relevant provisions of GB/T17421.1-1998 5.5.2.2.2
Put a square on the guide rail surface on the bed side. Fix the indicator on the horizontal slide so that its probe touches the square inspection surface. Move the horizontal slide to inspect.
The error is measured by the maximum difference in the indicator readings 5.4.2.2.2
Place a ruler horizontally on the guide rail surface of the bed. Fix the indicator on the horizontal slide so that its probe touches the inspection surface of the ruler. Move the horizontal slide to inspect.
The error is measured by the maximum difference in the indicator readings JB/T2523.4-14-
Inspection Items
Horizontal Slide
Move to the Vertical
Horizontal Slide
Move to the Vertical
Horizontal Slide
Move to the Vertical
Horizontal Slide
0.020/300
Only allow deviation to the faceplate
On the 300 measuring length
Inspection Tools
Indicator
Indicator
Inspection Method
Refer to the relevant provisions of GB/T17421.1-1998 5.5.2.2.2
Place a square on the side rail surface of the bed. Fix the indicator on the horizontal slide so that its probe touches the square inspection surface. Move the horizontal slide for inspection.
The error is measured by the maximum difference of the indicator readings 5.4.2.2.2
Place a ruler horizontally on the guide rail surface of the bed. Fix the indicator on the horizontal slide so that its probe touches the inspection surface of the ruler. Move the horizontal slide for inspection.
The error is measured by the maximum difference of the indicator readings JB/T2523.4-14-
Inspection Items
Horizontal Slide
Move to the Vertical
Horizontal Slide
Move to the Vertical
Horizontal Slide
Move to the Vertical
Horizontal Slide
0.020/300
Only allow deviation to the faceplate
On the 300 measuring length
Inspection Tools
Indicator
Indicator
Inspection Method
Refer to the relevant provisions of GB/T17421.1-1998 5.5.2.2.2
Place a square on the side rail surface of the bed. Fix the indicator on the horizontal slide so that its probe touches the square inspection surface. Move the horizontal slide for inspection.
The error is measured by the maximum difference of the indicator readings 5.4.2.2.2
Place a ruler horizontally on the guide rail surface of the bed. Fix the indicator on the horizontal slide so that its probe touches the inspection surface of the ruler. Move the horizontal slide for inspection.
The error is measured by the maximum difference of the indicator readings JB/T2523.4-1
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