JB/T 3644.1-1999 Horizontal multi-spindle automatic lathe precision inspection

JB/T 3644.1-1999 This standard is a revision of JB 3644-88 "Horizontal multi-spindle automatic lathe accuracy". During the revision, only editorial changes were made according to relevant regulations. This standard is part of the JB/T 3644 "Horizontal multi-spindle automatic lathe" series of standards, which includes the following two parts: JB/T 3644.1-1999 Horizontal multi-spindle automatic lathe accuracy inspection JB/T 3644.2-1999 Horizontal multi-spindle automatic lathe technical conditions This standard specifies the requirements and inspection methods for the geometric accuracy and working accuracy inspection of horizontal multi-spindle automatic lathes working with bars and chucks. This standard is applicable to horizontal multi-spindle automatic lathes working with bars and chucks. This standard was first issued in May 1984. JB/T 3644.1-1999 Horizontal multi-spindle automatic lathe precision inspection JB/T3644.1-1999 standard download decompression password: www.bzxz.net

ICS25.080.10
Machinery Industry Standard of the People's Republic of China
JB/T3644.1-1999
Horizontal Multi-spindle Automatic Lathe
Published on 1999-05-20
National Bureau of Machinery Industry
Precision Inspection
Implemented on 2000-01-01
JB/T3644.1-1999
This standard is a revision of JB364484 "Horizontal Multi-spindle Automatic Lathe" This standard is a part of the JB/T3644 series of standards for horizontal multi-spindle automatic lathes, which includes the following two parts: JB/T3644.1—1999 Precision inspection of horizontal multi-spindle automatic lathes JB/T3644.2—1999 Technical conditions for horizontal multi-spindle automatic lathes This standard replaces JB3644—84 from the date of implementation. This standard was proposed by the National Technical Committee for Metal Cutting Machine Tools Standardization. This standard is under the jurisdiction of the Automatic Lathe Branch of the National Technical Committee for Metal Cutting Machine Tools Standardization. The responsible drafting unit of this standard is Shenyang Automatic Lathe Research Institute. This standard was first issued in May 1984.
1 Scope
Machinery Industry Standard of the People's Republic of China
Precision Inspection of Horizontal Multi-spindle Automatic Lathes
JB/T3644.1-1999
Replaces JB364484
This standard specifies the requirements and inspection methods for geometric accuracy inspection and working accuracy inspection of horizontal multi-spindle automatic lathes working with bars and chucks.
This standard is applicable to horizontal multi-spindle automatic lathes working with bars and chucks. 2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T17421.1-1998 General Rules for Machine Tool Inspection Part 1: Geometrical Accuracy of Machine Tools under No-load or Finishing Conditions 3 General Requirements
3.1 When using this standard, reference should be made to GB/T17421.1, especially the installation before accuracy inspection, the idling temperature rise of the spindle and other components, the inspection method and the inspection tool accuracy.
3.2 Before the machine tool inspection, reference should be made to 3.1 of GB/T17421.1-1998 to adjust the installation level of the machine tool. Place a special bridge or flat ruler on the bed, and place a level on it. The readings of the level in the longitudinal and transverse directions shall not exceed the values ​​specified by the manufacturer. 3.3 The inspection item number of this standard does not indicate the actual inspection order. For the convenience of installing and disassembling inspection tools and inspection, the inspection can be carried out in any order.
3.4 ​​When inspecting the working accuracy, the inspection of the test piece should be carried out after finishing. The cutting amount, the form and shape of the tool and the easy-to-cut metal material and variety of the test piece are all specified by the manufacturer.
3.5 When the measured length is different from the length specified in this standard, the tolerance shall be converted according to the provisions of 2.3.1.1 of GB/T17421.1-1998. When the conversion result is less than 0.005mm, it shall still be calculated as 0.005mm. 3.6 The range of tolerance values ​​for each inspection item in this standard shall be determined according to the following table. mm
Number of spindles
Parameter name
Maximum bar diameter d
Chuck diameter D
Maximum bar diameter d
Chuck diameter D
Range 1
3.7 According to the agreement between the user and the manufacturer, the inspection items can be increased or decreased. Approved by the State Machinery Industry Bureau on 1999-05-20Range 2
125~≤200
20~<40
100~<160
Range 3
≥200
Implemented on 2000-01-01
4 Geometric accuracy inspection||t t||Inspection items
Spindle periodic axial
Inner seat diameter of the tension spring collet installed in the spindle
Axial runout (only applicable to
bar machine tools)
Tolerance mm
Inspection tools
Indicator
Special inspection fixture
Indicator
Inspection method
Refer to the relevant provisions of GB/T17421.11998 5.6.2.2.1;5.6.2.2.2
Fix the indicator so that its probe touches the steel ball in the center hole of the short inspection rod fixed at the end of the spindle, and rotate the spindle for inspection.
The error is measured by the maximum difference of the indicator readings. During the inspection, a force F specified by the manufacturer can be added to the spindle axis to eliminate the axial clearance of the spindle bearing.
Each spindle is inspected
Fix the indicator so that the probe touches the surface of the front cone hole and the guide hole, and rotate the spindle for inspection. The errors are calculated separately, and the maximum difference of the indicator readings is used as the measurement.
Each spindle is inspected
JB/T3644.1-
Special inspection rod
Inspection items
Another method:
Radial runout of the inner seat surface of the tension spring
spring chuck installed in the spindle:
a. Close to the spindle end;
b. A distance from the spindle end
Fixed length spring chuck installed
Spindle:
aRadial runout of the positioning hole:
b. Front nut of the spindle
Inner cone runout
Tolerance mm
0.0160.0200.030
0.0150.020
Inspection tools
Inspection rod
Indicator
Indicator
Inspection method
Refer to the relevant provisions of GB/T17421.1-19985.6.1.2.3
The indicator is fixed on the longitudinal tool holder, the probe touches the special inspection rod, and the rotating spindle is inspected at a and b.
The error is measured by the maximum difference of the indicator readings.
Each spindle is inspected
5.6.1.2.3
Fix the indicator, the probe touches the inspected surface, and the rotating spindle is inspected.
The error is measured by the maximum difference of the indicator readings
JB/T3644.1-
Inspection items
Tolerance of the push sleeve hole in mm
Radial runout (only applicable to 0.0120.015
for bar machine tools)
Another method:
Install the fixed-length spring chuck
Radial runout of the push sleeve in the spindle:
a. Close to the spindle end;
b. From the spindle end Spindle end 100
Spindle positioning end face
Runout (only for chuck
machine tool)
0.020|0.025
0.0150.0200.025
Inspection tool
Indicator
Special inspection rod
Indicator
Indicator
Inspection method
Refer to the relevant provisions of GB/T17421.1-1998. Each spindle is inspected.
The indicator is fixed on the longitudinal tool holder, the probe touches the surface of the inspection rod, and the rotating spindle is inspected at a. near the spindle end; b. 100mm away from the spindle end. The error is measured by the difference of the indicator readings. Each spindle is inspected
5.6.2.2.1, 5.6.22.2, 5.6.3.2Fix the indicator, and the probe touches the spindle positioning end face near the edge, and rotate the spindle for inspection. During the inspection, a force F specified by the manufacturer can be added to the spindle axis to eliminate the axial clearance of the spindle bearing.
Each spindle is inspected
JB/T3644.1-
Inspection items
Radial runout of spindle locating journal (only applicable to chuck machine tools)
Consistency of spindle locating end faces (each spindle end face should be located in the same plane
) (only applicable to chuck machine tools)
Tolerance mm
Inspection tools
Indicator
Indicator
Inspection method
Refer to the relevant provisions 5.6.1.2 of GB/T17421.1-1998.2
Fix the indicator so that the probe touches the spindle locating journal and rotate the spindle for inspection.
The error is measured by the maximum difference in the indicator readings. During the inspection, a force F specified by the manufacturer can be added to the spindle axis to eliminate the axial clearance of the spindle bearing.
Inspect each spindle
Fix the indicator so that the probe touches the spindle locating end face, rotate the spindle drum three full circles, and position it sequentially, and record the indicator readings on each spindle. The error is measured by the difference between the maximum and minimum readings of the indicator
JB/T3644.1-
Inspection items
Tolerance mm
Repeatability of spindle indexing
Positioning accuracy
Spindle radial position
0.0160.0200.025
Same degree
(Each spindle should be on the same
distribution circle)
Inspection tools
|Test rod
Indicator
Test rod
Indicator
Test method
Refer to the relevant provisions of GB/T17421.1-1998 5.4.1.2.1;5.4.3.2.1
The indicator is fixed at an appropriate position of the machine tool, such as on the horizontal tool holder, so that its probe touches the surface of the test rod fixed on the spindle along the tangential direction of the spindle drum distribution circle. The spindle drum rotates three full circles and is positioned sequentially. The spindle rotates and the average reading of the indicator on each test rod is recorded.
The error is measured by the maximum and minimum difference between the readings recorded by the indicator. During the inspection, the diameter difference between each inspection rod should be deducted
5.4.1.2.1;5.4.3.2.1
Fix the indicator so that its probe touches the surface of the inspection rod fixed on the spindle along the radial direction of the spindle drum distribution circle. The spindle drum rotates three full circles and positions sequentially. The spindle rotates and records the average reading of the indicator on each inspection rod.
The error is calculated as the difference between the maximum and minimum recorded readings of the indicator.
Diameter difference of each test rod should be deducted during inspectionJB/T3644.1-1
Inspection items
Parallelism of longitudinal tool holder movement to main
axis axis:
a. In radial plane;
b. In tangential plane
Measurement length0.8×
Maximum cutting length or
100mm (whichever is greater)
Parallelism of longitudinal tool holder guide groove to longitudinal tool holder movement
Tolerance mm
On 100 measuring length, it is
0.010.015
On 100 measuring length
Inspection tools
Inspection rod
Indicator| |tt||Indicator
Inspection method
Refer to the relevant provisions of GB/T17421.1-1998 5.4.1.2.1; 5.4.2.2.3
Install the indicator on a station of the longitudinal tool holder so that its probe touches the surface of the inspection rod fixed on the main shaft. Move the longitudinal tool holder to inspect in a radial plane and b. tangential plane respectively.
The errors a and b are calculated separately, and the error is measured as the difference in the indicator readings.
The influence of the coincidence between the axis of the inspection rod and the axis of the main shaft should be eliminated during the inspection.
Each station of the longitudinal tool holder inspects each main shaft 5.4.2.2.2
Fix the indicator so that its probe touches the guide groove surface of the longitudinal tool holder. Move the longitudinal tool holder Inspection. The error is measured by the maximum difference of the indicator reading. Each guide groove is inspected
JB/T3644.1-
String worm
Inspection items
Parallelism of the longitudinal tool holder's movement
Verticality of the horizontal tool holder's movement to the main
axis axis
Tolerance mm
On 100 measuring length
Chuck machine tool 0.025/100
(Only allowed to deviate to the main
Bar machine tool
Measuring length
0.0100.0150.025
Inspection tool
Indicator
Indicator Indicator
Test method
Refer to the relevant provisions of GB/T17421.1-1998. Fix the indicator so that its probe touches the working surface of the longitudinal tool holder, and move the longitudinal tool holder for inspection.
The error is measured by the maximum difference in the indicator readings. Each working surface is inspected
5.5.2.2.3
Adjust the flat plate (or flat ruler) installed on the spindle so that it is perpendicular to the axis of rotation. The indicator is installed on the horizontal tool holder so that its probe touches the flat plate (or flat ruler), and move the horizontal tool holder for inspection.
Turn the spindle 180° and inspect again.
The error is measured by the average of the two indicator readings.
The verticality of each horizontal tool holder to each spindle axis is inspected
JB/T 3644.1- 1999
Inspection items
Repetitive positioning of tool rest
Positioning accuracy:
a. Longitudinal tool rest;
b. Horizontal tool rest
Tolerance mm
0.020|0.025|0.030
Inspection tools
Indicator
Inspection method
Refer to the relevant provisions of GB/T17421.1-1998a The longitudinal tool rest is at the end of the stroke, fix the indicator so that the probe touches the end face of the longitudinal tool rest, record the indicator reading, return the longitudinal tool rest to repeat the positioning, and inspect continuously for at least 7 times.
The error is measured by the difference between the maximum and minimum readings of the indicator.
b. The indicators are installed on the cross-tool holder in sequence. The cross-tool holder is at the end of the stroke. The indicator probe touches the fixed part of the machine tool. The indicator reading is recorded. The cross-tool holder is returned to repeat the positioning and continuous inspection for at least 7 times.
The error is calculated by the difference between the maximum and minimum readings of the indicator (the cross-tool holder should be loaded so that it rests firmly on the stop iron)
JB/T3644.1-
5 Working accuracy inspection
Bar machine tool
D≥0.5×maximum bar diameter
L=08×maximum cutting stroke, or
2Xmaximum bar diameter or 100mm
(take the minimum value)
Chuck machine tool
D≥0. 3X chuck diameter
L=05×maximum cutting stroke or 100mm
(take the smaller value)
If L<50mm, two belts can be turned
1=10mm
Inspect the properties and cutting conditions
Install a single-edged turning tool along the spindle drum distribution circular cutting
line direction (such as position A) on a station
on the longitudinal tool holder, and clamp
on the cylindrical test
on each spindle
The outer circle of the workpiece is then cut and inspected repeatedly at the opposite workstation (such as position B). Inspection items: Precision of tangential turning of the outer circle. Check the change of diameter at the fixed end of the test piece, and measure at least 4 readings; Consistency of the diameter. In the same axial plane of the test piece, |Inspect the change of diameter
Measure
on a length of 100 with
micrometer
Refer to the relevant provisions of GB/T17421.1-1998 3.1;3.2;4.1;4.2;5.6.1.1.1
Inspect the test pieces on each axis
Main axis number
JConsistency of diameter
Main axis number
JB/T3644.1-11
The indicator is fixed at an appropriate part of the machine tool, for example, on the horizontal tool holder, so that its probe touches the surface of the inspection rod fixed on the spindle along the tangential direction of the spindle drum distribution circle. The spindle drum rotates three full circles and is positioned sequentially. The spindle rotates and the average reading of the indicator on each inspection rod is recorded.
The error is calculated by the maximum and minimum difference between the readings recorded by the indicator. The diameter difference between each inspection rod should be deducted during inspection
5.4.1.2.1;5.4.3.2.1
Fix the indicator so that its probe touches the surface of the inspection rod fixed on the spindle along the radial direction of the spindle drum distribution circle. The spindle drum rotates three full circles and is positioned sequentially. The spindle rotates and the average reading of the indicator on each inspection rod is recorded.
The error is calculated by the maximum and minimum difference between the readings recorded by the indicator.
Diameter difference of each test rod should be deducted during inspectionJB/T3644.1-1
Inspection items
Parallelism of longitudinal tool holder movement to main
axis axis:
a. In radial plane;
b. In tangential plane
Measurement length0.8×
Maximum cutting length or
100mm (whichever is greater)
Parallelism of longitudinal tool holder guide groove to longitudinal tool holder movement
Tolerance mm
On 100 measuring length, it is
0.010.015
On 100 measuring length
Inspection tools
Inspection rod
Indicator| |tt||Indicator
Inspection method
Refer to the relevant provisions of GB/T17421.1-1998 5.4.1.2.1; 5.4.2.2.3
Install the indicator on a station of the longitudinal tool holder so that its probe touches the surface of the inspection rod fixed on the main shaft. Move the longitudinal tool holder to inspect in a radial plane and b. tangential plane respectively.
The errors a and b are calculated separately, and the error is measured as the difference in the indicator readings.
The influence of the coincidence between the axis of the inspection rod and the axis of the main shaft should be eliminated during the inspection.
Each station of the longitudinal tool holder inspects each main shaft 5.4.2.2.2
Fix the indicator so that its probe touches the guide groove surface of the longitudinal tool holder. Move the longitudinal tool holder Inspection. The error is measured by the maximum difference of the indicator reading. Each guide groove is inspected
JB/T3644.1-
String worm
Inspection items
Parallelism of the longitudinal tool holder's movement
Verticality of the horizontal tool holder's movement to the main
axis axis
Tolerance mm
On 100 measuring length
Chuck machine tool 0.025/100
(Only allowed to deviate to the main
Bar machine tool
Measuring length
0.0100.0150.025
Inspection tool
Indicator
Indicator Indicator
Test method
Refer to the relevant provisions of GB/T17421.1-1998. Fix the indicator so that its probe touches the working surface of the longitudinal tool holder, and move the longitudinal tool holder for inspection.
The error is measured by the maximum difference in the indicator readings. Each working surface is inspected
5.5.2.2.3
Adjust the flat plate (or flat ruler) installed on the spindle so that it is perpendicular to the axis of rotation. The indicator is installed on the horizontal tool holder so that its probe touches the flat plate (or flat ruler), and move the horizontal tool holder for inspection.
Turn the spindle 180° and inspect again.
The error is measured by the average of the two indicator readings.
The verticality of each horizontal tool holder to each spindle axis is inspected
JB/T 3644.1- 1999
Inspection items
Repetitive positioning of tool rest
Positioning accuracy:
a. Longitudinal tool rest;
b. Horizontal tool rest
Tolerance mm
0.020|0.025|0.030
Inspection tools
Indicator
Inspection method
Refer to the relevant provisions of GB/T17421.1-1998a The longitudinal tool rest is at the end of the stroke, fix the indicator so that the probe touches the end face of the longitudinal tool rest, record the indicator reading, return the longitudinal tool rest to repeat the positioning, and inspect continuously for at least 7 times.
The error is measured by the difference between the maximum and minimum readings of the indicator.
b. The indicators are installed on the cross-tool holder in sequence. The cross-tool holder is at the end of the stroke. The indicator probe touches the fixed part of the machine tool. The indicator reading is recorded. The cross-tool holder is returned to repeat the positioning and continuous inspection for at least 7 times.
The error is calculated by the difference between the maximum and minimum readings of the indicator (the cross-tool holder should be loaded so that it rests firmly on the stop iron)
JB/T3644.1-
5 Working accuracy inspection
Bar machine tool
D≥0.5×maximum bar diameter
L=08×maximum cutting stroke, or
2Xmaximum bar diameter or 100mm
(take the minimum value)
Chuck machine tool
D≥0. 3X chuck diameter
L=05×maximum cutting stroke or 100mm
(take the smaller value)
If L<50mm, two belts can be turned
1=10mm
Inspect the properties and cutting conditions
Install a single-edged turning tool along the spindle drum distribution circular cutting
line direction (such as position A) on a station
on the longitudinal tool holder, and clamp
on the cylindrical test
on each spindle
The outer circle of the workpiece is then cut and inspected repeatedly at the opposite workstation (such as position B). Inspection items: Precision of tangential turning of the outer circle. Check the change of diameter at the fixed end of the test piece, and measure at least 4 readings; Consistency of the diameter. In the same axial plane of the test piece, |Inspect the change of diameter
Measure
on a length of 100 with
micrometer
Refer to the relevant provisions of GB/T17421.1-1998 3.1;3.2;4.1;4.2;5.6.1.1.1
Inspect the test pieces on each axis
Main axis number
JConsistency of diameter
Main axis number
JB/T3644.1-11
The indicator is fixed at an appropriate part of the machine tool, for example, on the horizontal tool holder, so that its probe touches the surface of the inspection rod fixed on the spindle along the tangential direction of the spindle drum distribution circle. The spindle drum rotates three full circles and is positioned sequentially. The spindle rotates and the average reading of the indicator on each inspection rod is recorded.
The error is calculated by the maximum and minimum difference between the readings recorded by the indicator. The diameter difference between each inspection rod should be deducted during inspection
5.4.1.2.1;5.4.3.2.1
Fix the indicator so that its probe touches the surface of the inspection rod fixed on the spindle along the radial direction of the spindle drum distribution circle. The spindle drum rotates three full circles and is positioned sequentially. The spindle rotates and the average reading of the indicator on each inspection rod is recorded.
The error is calculated by the maximum and minimum difference between the readings recorded by the indicator.
Diameter difference of each test rod should be deducted during inspectionJB/T3644.1-1
Inspection items
Parallelism of longitudinal tool holder movement to main
axis axis:
a. In radial plane;
b. In tangential plane
Measurement length0.8×
Maximum cutting length or
100mm (whichever is greater)
Parallelism of longitudinal tool holder guide groove to longitudinal tool holder movement
Tolerance mm
On 100 measuring length, it is
0.010.015
On 100 measuring length
Inspection tools
Inspection rod
Indicator| |tt||Indicator
Inspection method
Refer to the relevant provisions of GB/T17421.1-1998 5.4.1.2.1; 5.4.2.2.3
Install the indicator on a station of the longitudinal tool holder so that its probe touches the surface of the inspection rod fixed on the main shaft. Move the longitudinal tool holder to inspect in a radial plane and b. tangential plane respectively.
The errors a and b are calculated separately, and the error is measured as the difference in the indicator readings.
The influence of the coincidence between the axis of the inspection rod and the axis of the main shaft should be eliminated during the inspection.
Each station of the longitudinal tool holder inspects each main shaft 5.4.2.2.2
Fix the indicator so that its probe touches the guide groove surface of the longitudinal tool holder. Move the longitudinal tool holder Inspection. The error is measured by the maximum difference of the indicator reading. Each guide groove is inspected
JB/T3644.1-
String worm
Inspection items
Parallelism of the longitudinal tool holder's movement
Verticality of the horizontal tool holder's movement to the main
axis axis
Tolerance mm
On 100 measuring length
Chuck machine tool 0.025/100
(Only allowed to deviate to the main
Bar machine tool
Measuring length
0.0100.0150.025
Inspection tool
Indicator
Indicator Indicator
Test method
Refer to the relevant provisions of GB/T17421.1-1998. Fix the indicator so that its probe touches the working surface of the longitudinal tool holder, and move the longitudinal tool holder for inspection.
The error is measured by the maximum difference in the indicator readings. Each working surface is inspected
5.5.2.2.3
Adjust the flat plate (or flat ruler) installed on the spindle so that it is perpendicular to the axis of rotation. The indicator is installed on the horizontal tool holder so that its probe touches the flat plate (or flat ruler), and move the horizontal tool holder for inspection.
Turn the spindle 180° and inspect again.
The error is measured by the average of the two indicator readings.
The verticality of each horizontal tool holder to each spindle axis is inspected
JB/T 3644.1- 1999
Inspection items
Repetitive positioning of tool rest
Positioning accuracy:
a. Longitudinal tool rest;
b. Horizontal tool rest
Tolerance mm
0.020|0.025|0.030
Inspection tools
Indicator
Inspection method
Refer to the relevant provisions of GB/T17421.1-1998a The longitudinal tool rest is at the end of the stroke, fix the indicator so that the probe touches the end face of the longitudinal tool rest, record the indicator reading, return the longitudinal tool rest to repeat the positioning, and inspect continuously for at least 7 times.
The error is measured by the difference between the maximum and minimum readings of the indicator.
b. The indicators are installed on the cross-tool holder in sequence. The cross-tool holder is at the end of the stroke. The indicator probe touches the fixed part of the machine tool. The indicator reading is recorded. The cross-tool holder is returned to repeat the positioning and continuous inspection for at least 7 times.
The error is calculated by the difference between the maximum and minimum readings of the indicator (the cross-tool holder should be loaded so that it rests firmly on the stop iron)
JB/T3644.1-
5 Working accuracy inspection
Bar machine tool
D≥0.5×maximum bar diameter
L=08×maximum cutting stroke, or
2Xmaximum bar diameter or 100mm
(take the minimum value)
Chuck machine tool
D≥0. 3X chuck diameter
L=05×maximum cutting stroke or 100mm
(take the smaller value)
If L<50mm, two belts can be turned
1=10mm
Inspect the properties and cutting conditions
Install a single-edged turning tool along the spindle drum distribution circular cutting
line direction (such as position A) on a station
on the longitudinal tool holder, and clamp
on the cylindrical test
on each spindle
The outer circle of the workpiece is then cut and inspected repeatedly at the opposite workstation (such as position B). Inspection items: Precision of tangential turning of the outer circle. Check the change of diameter at the fixed end of the test piece, and measure at least 4 readings; Consistency of the diameter. In the same axial plane of the test piece, |Inspect the change of diameter
Measure
on a length of 100 with
micrometer
Refer to the relevant provisions of GB/T17421.1-1998 3.1;3.2;4.1;4.2;5.6.1.1.1
Inspect the test pieces on each axis
Main axis number
JConsistency of diameter
Main axis number
JB/T3644.1-12
Fix the indicator so that the probe touches the guide groove surface of the longitudinal tool holder, and move the longitudinal tool holder for inspection. The error is measured by the maximum difference in the indicator reading. Each guide groove is inspected
JB/T3644.1-
String worm
Inspection items
Parallelism of the longitudinal tool holder's working surface to the longitudinal tool holder's movement
Verticality of the horizontal tool holder's movement to the main
axis axis
Tolerance mm
0.015 on 100 measuring length
|0.025/10 for chuck machine tools 0
(Only allow deviation to the spindle)
Bar machine
Measurement length
0.0100.0150.025
Inspection tool
Indicator
Indicator
Inspection method
Refer to the relevant provisions of GB/T17421.1-1998. Fix the indicator so that its probe touches the working surface of the longitudinal tool holder, and move the longitudinal tool holder for inspection.
The error is measured by the maximum difference of the indicator reading. All working surfaces are inspected
5.5.2.2.3
Adjust the flat plate (or flat ruler) installed on the spindle so that it is perpendicular to the rotation axis. The indicator is installed on the horizontal tool holder so that its probe touches the flat plate (or flat ruler), and move the horizontal tool holder for inspection.
Turn the spindle 180° and inspect again.
The error is calculated as the average of two indicator readings.
The verticality of each horizontal tool rest to each spindle axis is tested
JB/T 3644.1- 1999
Test items
Tool rest position repeat positioning
Positioning accuracy:
a.Longitudinal tool rest;
b.Horizontal tool rest
Tolerance mm
0.020|0.025|0.030
Testing tools
Indicator
Testing method
Refer to the relevant provisions of GB/T17421.1-1998 a The longitudinal tool rest is at the end of the stroke, fix the indicator so that its probe touches the end face of the longitudinal tool rest, record the indicator reading, return the longitudinal tool rest and repeat positioning, and continuously test for at least 7 times.
The error is calculated by the difference between the maximum and minimum readings of the indicator.
b. The indicators are installed on the cross-tool holder in sequence. The cross-tool holder is at the end of the stroke. The indicator probe touches the fixed part of the machine tool. The indicator reading is recorded. The cross-tool holder is returned to repeat the positioning and continuous inspection for at least 7 times.
The error is calculated by the difference between the maximum and minimum readings of the indicator (the cross-tool holder should be loaded so that it rests firmly on the stop iron)
JB/T3644.1-
5Working accuracy inspection
Bar machine tool
D≥0.5×maximum bar diameter
L=08×maximum cutting stroke, or
2Xmaximum bar diameter or 100mm
(take the minimum value)
Chuck machine tool
D≥0. 3X chuck diameter
L=05×maximum cutting stroke or 100mm
(take the smaller value)
If L<50mm, two belts can be turned
1=10mm
Inspect the properties and cutting conditions
Install a single-edged turning tool along the spindle drum distribution circular cutting
line direction (such as position A) on a station
on the longitudinal tool holder, and clamp
on the cylindrical test
on each spindle
The outer circle of the workpiece is then cut and inspected repeatedly at the opposite workstation (such as position B). Inspection items: Precision of tangential turning of the outer circle. Check the change of diameter at the fixed end of the test piece, and measure at least 4 readings; Consistency of the diameter. In the same axial plane of the test piece, |Inspect the change of diameter
Measure
on a length of 100 with
micrometer
Refer to the relevant provisions of GB/T17421.1-1998 3.1;3.2;4.1;4.2;5.6.1.1.1
Inspect the test pieces on each axis
Main axis number
JConsistency of diameter
Main axis number
JB/T3644.1-12
Fix the indicator so that the probe touches the guide groove surface of the longitudinal tool holder, and move the longitudinal tool holder for inspection. The error is measured by the maximum difference in the indicator reading. Each guide groove is inspected
JB/T3644.1-
String worm
Inspection items
Parallelism of the longitudinal tool holder's working surface to the longitudinal tool holder's movement
Verticality of the horizontal tool holder's movement to the main
axis axis
Tolerance mm
0.015 on 100 measuring length
|0.025/10 for chuck machine tools 0
(Only allow deviation to the spindle)
Bar machine
Measurement length
0.0100.0150.025
Inspection tool
Indicator
Indicator
Inspection method
Refer to the relevant provisions of GB/T17421.1-1998. Fix the indicator so that its probe touches the working surface of the longitudinal tool holder, and move the longitudinal tool holder for inspection.
The error is measured by the maximum difference of the indicator reading. All working surfaces are inspected
5.5.2.2.3
Adjust the flat plate (or flat ruler) installed on the spindle so that it is perpendicular to the rotation axis. The indicator is installed on the horizontal tool holder so that its probe touches the flat plate (or flat ruler), and move the horizontal tool holder for inspection.
Turn the spindle 180° and inspect again.
The error is calculated as the average of two indicator readings.
The verticality of each horizontal tool rest to each spindle axis is tested
JB/T 3644.1- 1999
Test items
Tool rest position repeat positioning
Positioning accuracy:
a.Longitudinal tool rest;
b.Horizontal tool rest
Tolerance mm
0.020|0.025|0.030
Testing tools
Indicator
Testing method
Refer to the relevant provisions of GB/T17421.1-1998 a The longitudinal tool rest is at the end of the stroke, fix the indicator so that its probe touches the end face of the longitudinal tool rest, record the indicator reading, return the longitudinal tool rest and repeat positioning, and continuously test for at least 7 times.
The error is calculated by the difference between the maximum and minimum readings of the indicator.
b. The indicators are installed on the cross-tool holder in sequence. The cross-tool holder is at the end of the stroke. The indicator probe touches the fixed part of the machine tool. The indicator reading is recorded. The cross-tool holder is returned to repeat the positioning and continuous inspection for at least 7 times.
The error is calculated by the difference between the maximum and minimum readings of the indicator (the cross-tool holder should be loaded so that it rests firmly on the stop iron)
JB/T3644.1-
5Working accuracy inspection
Bar machine tool
D≥0.5×maximum bar diameter
L=08×maximum cutting stroke, or
2Xmaximum bar diameter or 100mm
(take the minimum value)
Chuck machine tool
D≥0. 3X chuck diameter
L=05×maximum cutting stroke or 100mm
(take the smaller value)
If L<50mm, two belts can be turned
1=10mm
Inspect the properties and cutting conditionsbzxZ.net
Install a single-edged turning tool along the spindle drum distribution circular cutting
line direction (such as position A) on a station
on the longitudinal tool holder, and clamp
on the cylindrical test
on each spindle
The outer circle of the workpiece is then cut and inspected repeatedly at the opposite workstation (such as position B). Inspection items: Precision of tangential turning of the outer circle. Check the change of diameter at the fixed end of the test piece, and measure at least 4 readings; Consistency of the diameter. In the same axial plane of the test piece, |Inspect the change of diameter
Measure
on a length of 100 with
micrometer
Refer to the relevant provisions of GB/T17421.1-1998 3.1;3.2;4.1;4.2;5.6.1.1.1
Inspect the test pieces on each axis
Main axis number
JConsistency of diameter
Main axis number
JB/T3644.1-1
JConsistency of diameter
Spindle number
JB/T3644.1-1
JConsistency of diameter
Spindle number
JB/T3644.1-1
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