JB/T 3313.3-1999 Accuracy inspection of plane milling machines

JB/T 3313.1-1999 This standard is a revision of JB 3312-83 "Surface milling machine accuracy". During the revision, only editorial changes were made according to relevant regulations, and the main technical content has not changed. This standard is part of the JB/T 3313 "Surface milling machine" series of standards, which includes the following four parts: JB/T 3313.1-1999 Surface milling machine parameters JB/T 3313.2-1999 Surface milling machine series JB/T 3313.3-1999 Surface milling machine accuracy inspection JB/T 3313.4-1994 Surface milling machine technical conditions This standard specifies the inspection method of geometric accuracy and working accuracy of surface milling machines. This standard is applicable to general-purpose vertical surface milling machines with a worktable width of 320~630mm, and column and face type surface milling machines with a worktable width of 320~1000mm. This standard was first issued in July 1983. JB/T 3313.3-1999 Accuracy test of plane milling machines JB/T3313.3-1999 Standard download decompression password: www.bzxz.net

ICS25.080.20
Machinery Industry Standard of the People's Republic of China
JB/T3313.3-1999
Surface milling machine
Published on 1999-05-20
Precision inspection
Implementation on 2000-01-01
State Bureau of Machinery Industry
JB/T3313.3—1999
This standard is a revision of JB331283 "Surface milling machine" with no changes to its contents.
Precision" was revised. Only editorial changes were made according to relevant regulations during the revision. It is part of the "Surface Milling Machine" series of standards. This series of standards includes the following four parts: This standard is JB/T3313
JB/T3313.1—1999
JB/T 3313.2—1999
JB/T3313.3—1999
Surface milling machine parameters
Surface milling machine
Series spectrum
Surface milling machine precision inspection
JB/T33131994
Surface milling machine technical conditions
This standard replaces JB331283 from the date of implementation. This standard is proposed by the National Technical Committee for Metal Cutting Machine Tools Standardization. This standard is under the jurisdiction of the Milling Machine Branch of the National Technical Committee for Metal Cutting Machine Tools Standardization. The responsible drafting unit of this standard is Jiangdong Machine Tool Factory. This standard was first issued in July 1983.
1 Scope
Standard of the Machinery Industry of the People's Republic of China
Surface milling machine accuracy inspection
This standard specifies the inspection method of geometric accuracy and working accuracy of surface milling machines. JB/T3313.3-1999
Replaces JB3312-83
This standard is applicable to vertical surface milling machines with a worktable width of 320~630mm for general use, and column and end surface milling machines with a worktable width of 320~1000mm.
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: Geometric Accuracy of Machine Tools under No-load or Finishing Conditions 3 General Requirements
3.1 When using this standard, reference must be made to GB/T17421.1, especially the installation before accuracy inspection, the idling temperature rise of the spindle and other components, and the inspection method.
3.2 Refer to 3.1 of GB/T17421.11998 When adjusting the installation level of the machine tool, one of the following methods can be used: a) Place the workbench in the middle of the stroke. Place a level gauge in the center of the workbench, and the readings of the level gauge in both the longitudinal and transverse directions shall not exceed 0.04/1000.
b) Place a bridge plate on the flat guide rail of the bed, a circular inspection rod on the V-shaped guide rail, and a flat ruler on the bridge plate and circular inspection rod perpendicular to the guide rail. Place a level gauge on each bridge plate, circular inspection rod, and flat ruler. a is parallel to the guide rail, b is perpendicular to the guide rail (see Figure 1). Adjust the guide rail to be level at both ends and the center. The readings of level gauge a and b shall not exceed 0.04/1000. Figure 1
3.3 The order of precision inspection items listed in this standard does not represent the actual inspection order. In order to facilitate the installation and disassembly of inspection tools and inspection, inspections can be carried out in any order.
3.4 ​​During the working precision inspection, the inspection of the test piece shall be carried out after fine milling. The recommended cutting amount for fine milling is: cutting depth 0.1mm, feed per tooth 0.1mm.
3.5 When the actual measured length is different from the length specified in this standard, the tolerance shall be converted according to the measurable length according to the provisions of 2.3.1.1 in GB/T17421.11998. When the conversion result is less than 0.005mm, it shall still be calculated as 0.005mm. 3.6 According to the agreement between the user and the manufacturer, the inspection items can be increased or decreased. 3.7 For the sake of simplicity, this standard only includes the schematic diagram of the column type surface milling machine for the same inspection items for column type and face type surface milling machines. Approved by the State Bureau of Machinery Industry on May 20, 1999 and implemented on January 1, 2000
|4 Geometric accuracy inspection
1) For double column surface milling machines, item a is not limited to the direction, and the inspection items are
Verticality of the vertical movement of the worktable to the spindle box
(only applicable to vertical and column type surface milling machines):
a In the horizontal vertical plane of the machine tool:
b. Flatness of the worktable surface in the longitudinal vertical plane of the machine tool
0.025/300
a≤9op1 )
0.025/300
Workbench length
For every 1000 increase,
Tolerance value increases
Maximum tolerance value
Local tolerance:
On any 300
Measuring length is
Inspection tool
Indicator
Inspection method
Refer to the relevant provisions of GB/T17421.1-1998 5.5.2.2.2
The workbench is located in the middle of the stroke.
The angle ruler is placed on the workbench surface:
a In the horizontal vertical plane: b. In the vertical vertical plane, fix the indicator so that its probe touches the angle ruler inspection surface. Lock the spindle box for inspection at the specified measuring length. Calculate the errors of a and b respectively. The error is calculated as the maximum difference of the indicator readings
5.3.2.2;5.3.2.3
The workbench is located in the middle of the stroke.
Inspect with a straight ruler: According to the diagram, place the equal height blocks on the three reference points a, b, and c of the workbench surface respectively. Place the straight ruler on the equal height blocks a-c, and place an adjustable block at point e. After adjustment, make it contact with the straight ruler inspection surface. Then place the straight ruler on the b-e blocks, and place an adjustable block at point d. After adjustment, make it contact with the straight ruler inspection surface. In the same way, place the straight ruler on the d-c and b-c blocks, and determine the adjustable blocks at the h and g positions respectively. Place the straight ruler in the orientation shown in the diagram. Use the gauge block to measure the distance between the workbench surface and the straight ruler inspection surface, and the error is calculated as the difference between the maximum and minimum distances.
Inspect with a spirit level: Perform according to the method shown in Figure 44 of GB/T17421.1-1998
JB/T3313.3-
Inspection items
Parallelism of worktable movement to the workwww.bzxz.net
table surface
Runout of the spindle end:
a. Radial runout of the spindle centering journal (for machine tools with centering
jb. Spindle c. The runout of the spindle shoulder bearing surface is the maximum allowable error value on any 300
measuring length. Inspection tool
Indicator
Indicator
Special inspection
Inspection method
Refer to the relevant provisions of GB/T17421.1-1998 5.4.2.2.2.1
Lock the spindle box.
Put two equal-height blocks on the workbench and a flat ruler on the equal-height blocks. Fix the indicator at the center of the spindle so that its probe touches the inspection surface of the flat ruler. Move the workbench for inspection. The error is measured by the maximum difference in the indicator readings. When the length of the workbench is greater than 1600mm, move the ruler step by step for inspection
a.5.6.1.2.2
b.5.6.2.2.1;5.6.2.2.2
c.5.6.3.2
Fix the indicator so that its probe touches: a. the spindle centering journal surface; b. the center of the end face of the special inspection rod inserted into the spindle taper hole; c. the spindle shoulder bearing surface near the edge. Rotate the spindle for inspection. Calculate the errors of a, b, and c respectively. The error is calculated as the maximum difference of the indicator readings.
When inspecting items b and c, an axial force F specified by the manufacturer should be applied through the spindle centerline (no force is required for spindles that have eliminated axial clearance)
JB/T3313.3-
Inspection items
Radial runout of the spindle taper hole axis:
a. Close to the spindle end face:
b.The parallelism of the spindle rotation axis to the work table at 300mm from the spindle end face (only applicable to column and end face milling machines) The verticality of the spindle rotation axis to the work table (only applicable to vertical surface milling machines): a. In the horizontal vertical plane of the machine tool: b. In the longitudinal vertical plane of the machine tool 0 on a length of 300 measured. .025
(The protruding
end of the inspection rod can only point downwards)
0.025/300
a≤90P
0.025/300
Inspection tool
Indicator
Inspection rod
Indicator
Inspection rod
Indicator
Special inspection
Inspection method
Refer to the relevant provisions of GB/T17421.1-1998 5.6.1.2.3
Insert the inspection rod into the spindle taper hole. Fix the indicator so that its probe touches the surface of the inspection rod:
a. Close to the spindle end face: b. 300mm away from the spindle end face. Rotating spindle inspection
Pull out the inspection rod, rotate it 90° relative to the spindle, reinsert it into the spindle taper, and repeat the inspection three times in sequence. Calculate the errors a and b separately. The error is calculated as the arithmetic mean of the four measurement results
5.4.1.2.4
The workbench is located in the middle of the stroke, and the spindle box and spindle sleeve are simply locked.
Insert the inspection rod into the spindle taper. Place the bracket with the indicator on the workbench so that its probe touches the surface of the inspection rod, move the bracket for inspection,
Rotate the spindle 180°, and repeat the inspection once. The error is calculated as half of the algebraic sum of the two measurement results5.5.1.215.5.1.2.4.2
The workbench is located in the middle of the stroke, and the spindle box and spindle sleeve are simply locked.
The indicator is mounted on a special test rod inserted into the spindle taper hole, so that its probe touches the worktable: a. In the horizontal vertical plane; b. In the vertical vertical plane, rotate the spindle for inspection.
Pull out the test rod, rotate it 180°, insert it into the spindle taper hole, and repeat the inspection.
Calculate the errors of a and b separately. The error is calculated as half of the algebraic sum of the two measurement results. JB/T3313.3- Inspection items Straightness of the center or reference T-slot of the worktable Verticality of the spindle rotation axis to the center or reference T-slot of the worktable (only applicable to the maximum allowable error value of 0.020/300 on any 500 measuring length (300 is the distance between the two measuring points of the indicator)
For column and face type plane
milling machine)
Inspection tools
Indicator
Special slide
Microscope
Indicator
Special inspection rod
Special slide
Inspection method
Refer to the relevant provisions of GB/T17421.1-1998 5.2.1.2:5.2.1.2.1
5.2.1.2.3 or 5.2.3.2
Put two equal height blocks on the workbench, and place the flat ruler on the equal height blocks. Place the special slide on the workbench and close to one side of the T-slot, and fix the indicator on it so that its probe touches the inspection surface of the flat ruler. Adjust the flat ruler so that the indicator readings are equal at both ends of the measured length. Move the special slide for inspection. The error is measured by the maximum difference of the indicator readings. 5.5.1.21; 5.5.1.2.5.2
The workbench is located in the middle of the stroke, and the spindle box and the spindle sleeve are locked.
Put the special slide on the workbench and close to the T-slot side.
The indicator is mounted on the special inspection rod inserted into the spindle taper hole so that its probe touches the inspection surface of the special slide. Move the slide and rotate the spindle for inspection.
Pull out the inspection rod, rotate it 180 degrees, insert it into the spindle taper hole, and repeat the inspection once. The error is calculated as half of the algebraic sum of the two measurement results. JB/T3313.3-
Inspection items
Parallelism of worktable movement to the center
or reference T-slot
Parallelism of suspension beam guide to the axis of spindle rotation (only applicable to column-type surface milling machines):
a In the vertical plane:
b. In the horizontal plane
The coincidence of the axis of the tool bar support hole to the axis of spindle rotation (only applicable to column-type surface milling machines):
a In the vertical plane:
b. In the horizontal plane
On any 300
measuring length The maximum allowable error value is 0.02 on the measured length of 300 (the protruding end of the cantilever beam is only allowed to point downward) and 0.020 on the measured length of 300. The axis of the tool bar support hole is only allowed to be lower than the axis of spindle rotation) Inspection tool Indicator Indicator Inspection rod Special bracket Indicator Inspection rod Special inspection fixture Inspection method Refer to the relevant provisions of GB/T17421.1-1998 5.4.2.21: 5.4.2.2.21 Lock the spindle box.
Fix the indicator so that its probe touches the side of the T-slot. Move the workbench for inspection.
The error is calculated as the maximum difference in the indicator readings 5.4.1.2.1; 5.4.1.2.5
Lock the suspension beam and the spindle sleeve.
Insert the inspection rod into the spindle taper hole. Install a special bracket with an indicator on the suspension beam guide rail so that the indicator probe touches the surface of the inspection rod: a. In the vertical plane: b. In the horizontal plane. Move the bracket for inspection.
Rotate the spindle 180° and repeat the inspection once. Calculate the errors a and b separately. The error is calculated as half of the algebraic sum of the two measurement results
The tool bar bracket is fixed 300mm away from the spindle end face and the suspension beam is locked.
Insert the inspection rod into the tool bar bracket hole. The indicator is mounted on a special gauge inserted into the spindle taper hole, with the probe as close to the tool holder as possible, touching the surface of the inspection rod: a. In the vertical plane: b. In the horizontal plane. Rotate the spindle for inspection. Calculate the a and b errors separately. The error is calculated as half of the maximum difference of the indicator reading
JB/T3313.3-
5 Working accuracy inspection
L=1/2 longitudinal stroke
=h=1/8 longitudinal stroke
lmax-100mm, for L≤500mm;
lmax=150mm, for 500mm≤L≤1000mm;max=200mm, for L>1000mm
lmin=50mm
Note (including vertical surface milling machines, column surface milling machines and end surface milling machines)
1 When the longitudinal stroke ≥400mm, one or two test pieces can be used, Longitudinal cutting should exceed the length of the test pieces at both ends. Inspection properties
A vertical flat milling machine uses a mobile workbench to mill the A surface
Cutting conditions
Use end mill
Inspection items
a. The A surface of each test piece should be straight;
b. The height H of the test piece should be
Inspection tools
Micrometer
Refer to the relevant provisions of GB/T17421.1
3.1:3.2.2
5.4.1.2.2
Ensure that the E surface is straight before trial cutting.
The test piece should be located on the longitudinal center line of the workbench, so that the length L is evenly distributed on both sides of the center line of the workbench.
Non-working sliding surfaces should be locked during cutting.
The milling cutter should be mounted on the tool bar for sharpening, and the following tolerances should be met during installation:
a. Roundness ≤0.02mm;
b. Radial runout ≤0.02mm;
c. Axial runout ≤0.03mm
JB/T3313.3-
2When the longitudinal stroke is less than 400mm, only one test piece should be used, and the longitudinal cutting should exceed the full length of the test piece.
3Double-column surface milling machines and double-end surface milling machines can use one or two rows of test pieces in the horizontal position of the worktable. 4Material: HT200
Inspection properties
B. Column type surface milling machine with work
Cutting conditions
Use sleeve type surface
Inspection items
a. Each test piece's B
milling cutter is used for rolling F
F surface should be straight;
table is used for motorized A
A milling.
surface milling.
Use the workbench machine
and the spindle box vertically to manually mill the B
surface, and the overlap at the joint is about
5~10mm
C. End face
plane milling machine uses the workbench
to perform
milling
surface B
b The specimen height H should be
equal:
Use the same
milling cutter
to perform end face milling. End mill
cB and F surfaces should be perpendicular
to E surface:
dB surface and F surface should be
parallel to each other
Note: F surface is only applicable to double
column plane milling machine
F surface of each specimen should be straight;
bB and F surface should be perpendicular
to E surface;:
cB surface and F surface should be
parallel to each other
Note: F surface is only applicable to double|| tt||Face milling machine
0.020/100
Inspection tools
Micrometer
Indicator
Indicator
Refer to the relevant provisions of GB/T17421.1
JB/T3313.3-
Republic
Mechanical industry standard
Surface milling machine
Precision inspection
JB/T3313.31999||t t||Published by the Machinery Standardization Research Institute of the Ministry of Machinery Industry Printed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry (No. 2 Shouti South Road, Beijing, zip code 100044)*
Format 880×1230
Printing sheet 3/4
4Number of words 18000
First edition in July 1999
Print run 1-500
First printing in July 1999
Price 1000 yuan
99-313
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