JB/T 4367-1996 Accuracy inspection of floor-standing milling and boring machines
Some standard content:
J54
JB
Machinery Industry Standard of the People's Republic of China
JB/T 4367-96
Floor type milling and boring machine
Released on 1996-11-07|| tt | |tt||Words
This standard is a revision of JB4367-86 "Accuracy of Floor-standing Boring Machines and Floor-standing Milling and Boring Machines". At the time of revision, the technical content is equivalent to ISO3070/2-1978 "Accuracy Inspection of Horizontal Milling and Boring Machines". The writing format is in accordance with the relevant provisions of standards such as GB/T1.1-1993 "Standardization Work Guidelines Unit 1: Rules for Drafting and Presentation of Standards Part 1: Basic Provisions for Standard Writing". In accordance with the spirit of actively adopting international standards, combined with my country's actual situation and many years of production practice, this standard has made a few modifications to the international standards:
-G3 item *Straightness of vertical movement of spindle box", ISO3070/2 (Item G5) Use steel wire and microscope to measure. This standard stipulates that when the stroke is <1600mm, use a square to measure; when the stroke is ≥1600mm, use a level to measure. Regarding the "deflection of the boring spindle when it moves in its axial direction" inspection, this is the test. Except for the provisions of ISO3070/2 (G15), the standards of other countries and famous manufacturers do not have this requirement. This inspection involves the bending of the boring spindle, and due to the limitations of the machine tool structure, the inspection method is complicated, and After the G10 inspection, the accuracy of the boring axis movement can be guaranteed, so this standard does not stipulate this requirement. This standard will replace JB4367-86 "Accuracy of Floor-standing Boring Machines and Floor-standing Milling and Boring Machines" from the date of effectiveness. Proposed by the Metal Cutting Machine Tool Standardization Technical Committee. This standard is under the jurisdiction of Wuhan Heavy Machine Tool Research Institute. This standard was drafted by: Wuhan Heavy Machine Tool Factory, Qiqihar Second Machine Tool Factory, and Wuhu Heavy Machine Tool Factory. This standard was first released in 1986.
ISO Foreword
ISO (International Organization for Standardization is a joint organization of national standards associations (ISO members) around the world. The formulation of international standards is completed by ISO’s technical committee. For a certain committee established by the technical committee Each ISO member interested in a topic has the right to express his or her views on the technical committee. International organizations, official or non-official bodies associated with ISO may also participate in this work on draft International Standards accepted by the technical committee. Before being designated as an official international standard by the ISO Council, it must be voted by each member
International standard ISO3070/2 was developed by the ISO/TC39 Machine Tool Technical Committee and sent to all members in 1977. Members of the following countries agree:
Australia
Germany
North Korea
Republic of South Africa
Turkey
Belgium
Leicester
Mexico
Spain
UK
No member state disagrees with this standard. Brazil
India
Poland||tt| |Sweden
United States
France
Italy
Romania
Switzerland
Yugoslavia
1 range
Machinery Industry Standard of the People's Republic of China
Floor Milling and Boring Machine
Accuracy Inspection
JB/T 4367-96
Replaces JB4367-86
This standard stipulates Requirements and inspection methods for preset inspection, geometric accuracy and working accuracy of floor-mounted milling and boring machines. This standard is applicable to general-purpose floor-mounted milling and boring machines with shaft diameters of 90 to 260 mm. 2 Reference standards
Provisions included in the following standards. , constitutes a provision of this standard by being used in this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision and parties using this standard should explore the possibility of using the latest version of the standard listed below. GB1183-80 Terms and Definitions of Shape and Position Tolerances JB2670-82 General Principles for Accuracy Inspection of Metal Cutting Machine Tools 3 General Requirements
3.1 Adjust the installation level with reference to 3.1 in JB2670--82, at both ends of the bed guide rail along the longitudinal direction of the machine tool and Place the level horizontally, and the readings of the level in both the longitudinal and transverse directions shall not exceed 0.040/1000. 3.2 During inspection, the actual inspection sequence can generally be arranged according to the requirements of assembly and disassembly of inspection tools, convenience of inspection, and thermal inspection items. 3.3 When inspecting working accuracy, the inspection of the test piece should be carried out after finishing. 3.4 When the actual measured length is different from the length specified in this standard, the tolerance should be converted according to the measurable length according to the provisions of 2.3.1.1 in JB2670-82. When the conversion result is less than 0.0025mm, it will still be calculated as 0.0025mm. 3.5 The direction parallel to the axis of the boring axis is called the longitudinal direction, and the horizontal direction perpendicular to the longitudinal direction is called the transverse direction. 3.6 The plane passing through the boring axis axis and the symmetry plane of the column guide rail is called the longitudinal plane, and the upright plane passing through the boring axis axis perpendicular to the longitudinal plane is called the transverse plane.
3.7 If there are no special provisions on the position of machine tool components in the inspection method, the spindle box and column should be placed in the middle of their stroke, and the boring spindle and ram should be retracted during inspection. 3.8 When checking the accuracy of the ram operation, the balance compensation device should be activated. 3.9 Pre-adjusting inspection G01, G02 and G03 are inspected during the assembly process and will not be re-inspected after the load test. 3.10 According to the agreement between the user and the manufacturer, the inspection items can be increased or decreased. Approved by the Ministry of Machinery Industry on 1996-11-07
Implemented on 1997-01-01
1
4 pre-adjusted inspection
serial number
G01||tt ||G02
简
Back
Picture
Inspection items
The bed guide rail is in the
vertical plane||tt| |Straightness
Parallelness
full
difference
mm||tt| of the bed guide rail in the
vertical plane |Within 1000 length
, it is 0.020
for every increase in length
1000 tolerance value increases
adds 0.010
maximum tolerance value||tt| | is:
0.050 within 10000
0.050 within
length exceeds
0.080
Local tolerance:
at any 500| |tt||The measuring length is
0.010
0.020/1000
Inspection tools
Precision level
Bridge
Optical or other
method
precision level
bridge plate
inspection method
refer to the relevant provisions of JB2670
3.1.3.2, 5.2. 1.2.2
Place a level on the bed guide rail along the longitudinal direction. The equidistant moving bridge plate is inspected along its entire length. Draw the guide rail error curve. The error is calculated as the maximum algebraic difference in coordinate values ??between the curve and the line connecting its two end points.
The local error is calculated by the maximum algebraic difference in coordinate values ??between two points on any local measurement length and the line connecting the two end points of the curve. 5.4.1.2.2
Place a level horizontally on the bed guide rail , the equidistant moving bridge plate is inspected along the entire length.
The error is calculated by the maximum algebraic difference of the level reading JB/T4367-96
Serial number
G03
Charge
Steel wire
Simplified
Picture
Inspection items
The straightness of the bed guide rail in the
horizontal plane
linearity
chargewwW.bzxz.Net
The difference
mm
is 0.020 within 1000 length
Every time the length increases by
1000, the tolerance value increases
0.005|| tt||The maximum tolerance value
is:
0.050 within 10000 degrees
0.080 if the length exceeds
10000||tt| |Local Tolerance:
0.010
Inspection Tools
Wire and Microscope
Mirror or Other optics
Instruments
Inspection methods
Refer to the relevant provisions of JB2670
5.2.1.2.3
Tighten a steel wire on the foundation of the bed along the direction of the bed guide rail. Fix the microscope on the special inspection tool, adjust the steel wire so that the microscope readings are equal at both ends of the steel wire, and move the inspection tool at an equal distance to inspect the entire length. Record readings every length of gauge.
The full-length error is calculated as the maximum algebraic difference in microscope readings.
The local error is measured at any part of the measured length, based on the maximum algebraic difference between the microscope readings
JB/T
4367
96
5| |tt||Geometric accuracy inspection
Serial number
G1
G2
Simplified
Picture
Middle
Inspection items
The movement of the column is within the
|
0.040 within 1000 length
Every time the length increases by
1000, the tolerance value increases
plus 0.005
The maximum tolerance The value
is:
0.120
Local tolerance:
at any 500
measured length is
0.015
Straight in the horizontal plane with a length of 1000
! | |tt | The value
is:
0.120
Local tolerance:
at any 500
measured length is
0.015
Inspection tools
Precision level
Steel wire
Microscope
or optical instrument
Inspection method
Refer to the relevant provisions of JB2670||tt| |5.2.3,5.2.1.2.2.1.5.2.1.2.2.2 Act as a level on the sliding seat along the transverse direction. The moving column is inspected throughout its travel. Draw the guide rail error curve. The error is calculated as the maximum algebraic difference in coordinate values ??between the curve and the line connecting its two end points.
The local error is calculated as the maximum algebraic difference between the standard values ??between two points on any local measurement length and the line connecting the two end points of the curve. 5.2.3, 5.2.3.2.2, 5.2.1.2.2.2 on the bed Tension a steel wire on the foundation along the direction of the bed guide rail, fix the microscope on the sliding seat, adjust the steel wire so that the microscope readings are equal at both ends of the steel wire, and move the column at equal distances to check the entire stroke.
The error is calculated as the maximum algebraic difference in microscope readings. The local error is calculated as the maximum algebraic difference between the microscope readings on any local measurement length
JB/T 4367-96
Serial number
G3
简||tt ||Figure
Inspection items
Spindle box vertical
moving straight line
degree
a, in the longitudinal
plane|| tt | | |tt | The length of 4000
degrees, for every increase of
1000, the tolerance value increases by
plus 0.020
inspection tools
indicator
, etc. High gauge block
square ruler
precision level
or optical instrument
inspection method
refer to the relevant provisions of JB2670
5.2.1.2. 1,5.2.1.2.2,5.2.1.2.2.2 During inspection, the slide seat is locked.
Place two equal-height measuring blocks on the platform support, place a square ruler on the measuring blocks, and fix the indicator on the spindle box so that its measuring head touches the square square inspection surface: a, in the longitudinal plane; b. in the transverse plane.
Adjust the square ruler so that the indicator readings are equal at both ends of the square ruler, and move the spindle box to check while locking.
The error is calculated as the maximum difference in indicator readings. When the headstock stroke is ≥1600mm, place a level on the headstock: a. In the longitudinal plane; b. In the transverse plane. Move the spindle box at equal distances and inspect it over the entire stroke. Record the a and b errors separately and draw the error curve. The a and b errors are calculated separately.
The error is calculated by the maximum algebraic difference between the coordinate values ??of the curve connecting its two end points
JB/T
4367-
Serial number
G4
G5
简
1)D boring spindle diameter. Down.
Picture
Inspection items
Verticality of the spindle box
Movement versus column movement
Verticality of movement
Axle taper hole axis|| tt||The radial jump of the line
movement:
a, close to the boring
shaft end
b, 300mm from the end of the boring shaft
place
charge
mm
difference
0.030/1000
D≤130
a.0.010|| tt||b.0.020
D>130
a.0.015
bo030
Inspection tool
Indicator
Contour Block
Flat ruler
Cylinder square
Or optical instrument
Indicator
Inspection rod
Inspection method
Reference Relevant provisions of JB2670
5.5.2.2.4
The main spindle box is placed at 1/3 of the bottom-up stroke. Place two equal-height measuring blocks on the platform support, place them flat on the measuring blocks, fix the indicator on the main spindle box, move the column to make the indicator readings equal at both ends of the flat ruler, and lock the slide. Place a square on the flat ruler, change the position of the indicator so that the probe touches the inspection surface of the square, and move the spindle box to inspect while it is locked. The error is calculated as the maximum difference in indicator readings. 5. 6.1.2.3
When inspecting, the ram is locked.
Insert a test rod into the boring shaft chain hole. Fix the indicator so that its probe touches the surface of the inspection rod: a. Near the end of the boring spindle; b. 300mm away from the end of the boring spindle. Rotary boring inspection. Pull out the test rod and rotate it 90°, reinsert it and test it three times in sequence.
a and b errors are calculated separately. The error is calculated as the average of four measurements.
Inspection is required in both the vertical plane and the horizontal plane JB/T4367-96
Serial number
G6
G7
简
300 | |tt | |b. 300mm from the end of the milling axis
at
axial direction of the boring axis
charge
difference| |tt||mm
D≤130
a.0.010
b.0.020
D>130
a.0.015
b.0.030
D≤130
0.010
D>130
0.015
Inspection Tools
Indicator
Indicator
Inspection rod
Inspection method
Refer to the relevant provisions of JB2670
5.6.1.2.2
During inspection, the ram is locked.
Fix the indicator so that its probe touches the surface of the tank shaft: a. Near the end of the milling axis; b. 300mm away from the end of the milling axis, rotate the boring axis for inspection.
a and b errors are calculated separately. The error is measured as the maximum difference in indicator readings.
5.6.2.2.1,5.6.2.2 are required to be inspected both in the vertical plane and in the horizontal plane.2
During inspection, the ram is locked.
Insert a test rod into the taper hole of the boring spindle. Fix the indicator so that its probe touches the surface of a steel ball in the center hole of the test rod. Rotating boring spindle inspection.
The error is calculated as the maximum difference in indicator readings JB/T.
4367-
-96
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