JB/T 2255.1-1999 This standard is a revision of JB 2255-85 "Precision of jig boring machine rotary table". During the revision, only editorial changes were made according to relevant regulations, and the technical content was not changed. This standard is part of the JB/T 2255 "Jig boring machine rotary table" series of standards, which includes the following two parts: JB/T 2255.1-1999 Jig boring machine rotary table accuracy inspection JB/T 2255.2-1999 Technical conditions for jig boring machine rotary table This standard specifies the requirements and inspection methods for the geometric accuracy of jig boring machine rotary tables. This standard is applicable to horizontal rotary tables and universal rotary tables for jig boring machines with a rotary table diameter less than or equal to 1500mm. This standard was first issued in July 1977 and revised for the first time in August 1985. JB/T 2255.1-1999 JIB boring machine rotary table accuracy test JB/T2255.1-1999 standard download decompression password: www.bzxz.net

ZCS25.080.20
Machinery Industry Standard of the People's Republic of China
JB/T2255.1-1999
Jig Boring Machine Rotary Table
1999-05-20 Issued
Precision Inspection
2000-01-01 Implementation
State Machinery Industry Bureau
JB/T2255.1—1999
This standard is a revision of JB225585 "Jig Boring Machine Rotary Table Precision" This standard is part of the JB/T2255 series of standards for "Jig Boring Machine Rotary Tables", which includes the following two parts: JB/T2255.1—1999
Jig Boring Machine Rotary Table Accuracy Inspection
Jig Boring Machine Rotary Table
Technical Conditions
JB/T2255.2—1999
This standard replaces JB2255—85 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 Jig Boring Machine Branch of the National Technical Committee for Metal Cutting Machine Tools Standardization. The responsible drafting unit of this standard is Kunming Machine Tool Co., Ltd. This standard was first issued in July 197 and revised for the first time in August 1985.
1 Scope
Machinery Industry Standard of the People's Republic of China
Testing the Accuracy of Coordinate Boring Machine Rotary Table
This standard specifies the requirements and testing methods for the geometric accuracy of rotary tables for coordinate boring machines. JB/T2255.1-1999
Replaces JB225585
This standard applies to horizontal rotary tables and universal rotary tables for coordinate beds with a rotary table diameter less than or equal to 1500mm. Cited Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. At the time of publication of this standard, the versions shown are valid. All standards are subject to revision, 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 GB/T17421.1 must be referred to when using this standard. 3.2 When inspecting the accuracy of the turntable, the ambient temperature should be kept within 20℃±2℃. 3.3 The actual inspection sequence can generally be arranged according to the installation and disassembly of the inspection tools and the convenience of inspection. 3.4 In this standard, G4A, G5A, and G6A are inspected on the inspection table, and G4B, G5B, and G6B are inspected on the matching machine tool. The manufacturer can choose any one to inspect.
3.5 The inspection items G5A, G5B, G6A, G6B, G7, and G9 in this standard are only applicable to the inspection of universal turntables. 3.6 According to the agreement between the user and the manufacturer, the inspection items can be increased or decreased. Approved by the State Bureau of Machinery Industry on May 20, 1999, and implemented on January 1, 2000
4 Geometric accuracy inspection
Inspection items
Flatness of turntable surface
Turntable diameter
≤1000
Local tolerance:
Measuring length of any 300mm
Grade I is 5m
Grade II is 7um
Inspection tools
Level
Bridge plate or straight ruler
Equal height blocks
Indicator
Inspection method
Refer to the relevant provisions 5.3.2.3 of GB/T17421.1-1998
Place a bridge plate on the turntable surface and place a level on it. Move the bridge plate along the measurement direction shown in the figure. Record the level reading every time the bridge plate is moved. Establish the reference plane through OAC on the turntable surface and obtain the coordinate values ​​of each measuring point to the reference plane according to the level reading.
The error is calculated as the maximum algebraic difference between the maximum and minimum coordinate values ​​of each point on the measured surface to the reference plane. The local error is calculated as the algebraic difference between the coordinate values ​​of each point on the measured surface to the reference plane on any 300mm measuring length.
You can also use a flat ruler, equal height block and indicator to check JB/T2255.1-
Inspection items
End runout of turntable surface
Turntable diameter
≤200
>200~350
>350~500
>500~800
>800~1250
Inspection tools
Indicator
Inspection method
Refer to the relevant provisions of GB/T17421.1-1998 5.6.3.2
Fix the indicator so that its probe touches the edge of the table vertically. Turntable inspection.
The error is measured by the maximum difference in the indicator readings. When the universal turntable is in a vertical position, check again.
The error is calculated as the maximum value of the two measurement results. It is allowed to place gauge blocks on the table to check
JB/T2255.1-
Inspection itemsWww.bzxZ.net
Radial runout of turntable center hole
:
a Near table surface:
b. Distance from table surface
Turntable diameter L
≤200
>200~350
>350~800
>800~1250
Level I Level II
Inspection tools
Indicator
Inspection rod
Inspection method
Refer to the relevant provisions of GB/T17421.1-1998 5.6.1.2.3
Insert the inspection rod into the turntable center hole. Fix the indicator so that its probe touches the surface of the inspection rod vertically a. Near the table surface: b. L away from the table surface. Pull out the inspection rod from the turntable surface, rotate it 90°, reinsert it into the center hole of the turntable, and repeat the inspection three times in sequence. Calculate the errors of a and b separately. The error is calculated as the arithmetic mean of the four readings of the indicator.
The universal turntable table surface must be inspected in both horizontal and vertical positions
When the center hole is a straight hole, only inspect at a, or directly inspect the radial runout of the center hole surface, and the tolerance is the same as a
JB/T2255.1-
Inspection items
Turntable surface
Parallelism of turntable bottom surface
Turntable diameter
≤200
>200~350|| tt||>350~500
>500~800
>800~1250
Inspection tools
Indicator
Inspection table
Inspection method
Refer to the relevant provisions of GB/T17421.1-1998 5.4.2.22.2
Put the turntable on the inspection table, clamp the turntable table top and place the flat ruler on the special table along the two perpendicular directions a and b. Put the bracket on the inspection table, fix the indicator on the bracket so that its probe touches the upper surface of the flat ruler vertically. Move the bracket, inspect the flat ruler along the ab direction, turn it 180° and inspect it again in the same way. Calculate the a and b errors separately. The error is calculated as half of the algebraic sum of the two measurement results.
Allows inspection with equal height gauge blocks
JB/T2255.1-
Inspection items
Turntable table
Parallelism of the machine tool worktable and spindle box in the longitudinal and transverse moving directions
Turntable diameter
≤200
>200~350
>350~500||tt ||>500~800
>800~1250
Inspection tools
Indicator
Inspection table
Inspection method
Refer to the relevant provisions of GB/17421.1-1998 5.4.2.22.2
Put the turntable on the inspection table, clamp the turntable table and place a flat ruler on the turntable table: a. Along the machine tool vertical direction: b. Along the machine tool horizontal direction. The indicator is fixed on the main shaft of the machine so that its probe touches the upper surface of the flat ruler vertically. Move the machine tool table or spindle box in the longitudinal and horizontal directions for inspection.
Turn the flat ruler 180° and inspect again in the same way. Calculate the errors of a and b separately. The error is calculated as half of the algebraic sum of the two measurement results.
It is allowed to use equal height blocks for inspection
JB/T2255.1-
Inspection items
Universal turntable
Verticality of the tilt axis to the
turntable side reference
surface in the horizontal plane
Turntable diameter
≤200
>200~350
>350~500
>500~800
Inspection tools
Indicator
Inspection table
Inspection method
Refer to the relevant provisions of GB/T17421.1-1998 5.4.2.2.22: 5.5.2.2.2
Place the turntable on the inspection table surface with the turntable table surface in a horizontal position and clamped so that its side reference surface is close to the vertical table V of the inspection table. Place a ruler parallel to the tilt axis on the turntable surface. Fix the indicator on a special bracket so that its probe touches the upper surface of the ruler vertically. Adjust the ruler so that its upper surface is parallel to the bottom surface of the turntable and fix it.
The turntable surface is tilted 90° and clamped. Adjust the indicator so that its probe touches the upper surface of the ruler vertically, and move the indicator along the inspection table surface H and the reference surface W for inspection.
The error is the maximum algebraic difference of the indicator readingJB/T2255.1-
Inspection items
Universal turntable
Vertical axis of tilt to
machine tool spindle box
or worktable horizontal movement in the horizontal
plane
Turntable diameter
≤200
>200~350
> 350~500
>500~800
Inspection tools
Indicator
Inspection method
Refer to the relevant provisions of GB/T17421.1-1998 5.4.2.2.2.25.5.2.2.2
Install the turntable on the machine tool worktable, the turntable table is in a horizontal position and clamped, so that its side reference surface is close to the positioning surface of the worktable. Place a straight ruler on the turntable table parallel to the tilt axis. Fix the indicator on the spindle so that its probe touches the upper surface of the straight ruler vertically.
Adjust the straight ruler so that its upper surface is parallel to the lateral movement direction of the machine tool, and fix it.
Tilt the turntable table 90 and clamp it, adjust the indicator so that its probe touches the upper surface of the straight ruler vertically. Move the worktable or spindle box along the machine tool horizontally for inspection. The error is measured by the maximum algebraic difference of the indicator readings. JB/T2255.1-
Inspection items
Universal turntable
Parallelism of the tilt axis to
Turntable side reference
surface in the vertical plane
Turntable diameter
≤200
>200~350
>350~500
>50 0~800
Inspection tools
Inspection table
Inspection method
Refer to the relevant provisions of GB/T17421.1-1998 5.4.2.2.2.25.5.2.2.2
Put the turntable on the inspection table, the turntable table is in a horizontal position and clamped, so that its side reference surface is close to the vertical surface V of the inspection table, and place a straight ruler on the turntable table parallel to the tilt axis. Fix the indicator on the special bracket so that its side head touches the side surface of the straight ruler vertically. Adjust the straight ruler so that its side surface is parallel to the vertical reference surface W and fix it.
Tilt the turntable table by 90° and clamp it, adjust the indicator so that its probe touches the side surface of the straight ruler vertically, and move the indicator along the inspection table surface H and the reference surface W for inspection.
The error is measured by the maximum algebraic difference of the indicator readings JB/T2255.1-
Inspection items
Universal turntable
Inclined axis to
machine tool spindle box
or worktable horizontal movement in the vertical plane
turntable diameter
≤200
>200~350
> 350~500
>500~800
Inspection tools
Indicator
Inspection method
Refer to the relevant provisions of GB/T17421.1-1998 5.4.2.2.2.25.5.2.2.2
Install the turntable on the machine tool work surface, the turntable table is in a horizontal position and clamped so that its side reference surface is close to the positioning surface of the work surface. Place a straight ruler on the turntable table parallel to the tilt axis. Fix the indicator on the spindle so that its probe touches the side surface of the straight ruler vertically. Adjust the straight ruler so that its side surface is parallel to the lateral movement direction of the machine tool and fix it.
Tilt the turntable table 90° and clamp it. Adjust the indicator so that its probe touches the side surface of the straight ruler vertically. Check along the lateral movement of the worktable or spindle box at the end of the machine. The error is measured by the maximum algebraic difference of the indicator readings JB/T2255.1-1-
Inspection items
Universal turntable
Inclined axis line to
machine tool spindle box
or||table horizontal
movement in the vertical
plane
turntable diameter
≤200
>200~350
>350~500
>500~800
Inspection tools
Indicator
Inspection method
Refer to the relevant provisions of GB/T17421.1-1998 5.4.2.2.2.25.5.2.2.2
Install the turntable on the machine tool worktable surface with the turntable surface in a horizontal position and clamped so that its side reference surface is close to the positioning surface of the worktable surface. Place a ruler parallel to the tilt axis on the turntable surface. Fix the indicator on the spindle so that its probe touches the side surface of the ruler vertically. Adjust the ruler so that its side surface is parallel to the lateral movement direction of the machine tool and fix it.
Tilt the turntable surface 90° and clamp it. Adjust the indicator so that its probe touches the side surface of the ruler vertically. Move the workbench or spindle box horizontally along the end of the machine to check. The error is measured by the maximum algebraic difference of the indicator readings JB/T2255.1-1-
Inspection items
Universal turntable
Inclined axis line to
machine tool spindle box
or||table horizontal
movement in the vertical
plane
turntable diameter
≤200
>200~350
>350~500
>500~800
Inspection tools
Indicator
Inspection method
Refer to the relevant provisions of GB/T17421.1-1998 5.4.2.2.2.25.5.2.2.2
Install the turntable on the machine tool worktable surface with the turntable surface in a horizontal position and clamped so that its side reference surface is close to the positioning surface of the worktable surface. Place a ruler parallel to the tilt axis on the turntable surface. Fix the indicator on the spindle so that its probe touches the side surface of the ruler vertically. Adjust the ruler so that its side surface is parallel to the lateral movement direction of the machine tool and fix it.
Tilt the turntable surface 90° and clamp it. Adjust the indicator so that its probe touches the side surface of the ruler vertically. Move the workbench or spindle box horizontally along the end of the machine to check. The error is measured by the maximum algebraic difference of the indicator readings JB/T2255.1-
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