JB/T 9929-1999 This standard is a revision of ZBn J54 016-88 "Static rigidity of lifting table milling machine". During the revision, only editorial changes were made according to relevant regulations, and the technical content remained unchanged. This standard specifies the test method and technical requirements for the static rigidity of lifting table milling machines. This standard is applicable to general-purpose lifting table milling machines with a worktable width of 200~500mm. This standard was first issued in November 1988. JB/T 9929-1999 Static rigidity of lifting table milling machines JB/T9929-1999 Standard download decompression password: www.bzxz.net

1CS25.080.20
Machinery Industry Standard of the People's Republic of China
JB/T 9929=1999
Lifting Table Milling MachinebzxZ.net
1999-05-20 Issued
Static Stiffness
2000-01-01 Implementation
National Bureau of Machinery Industry
JB/T9929--1999
This standard is in response to the revision of 2BJ54016BB Lifting Table Milling Machine Static Stiffness. When revised, it is only revised according to the relevant current regulations, and the technical content has not changed. This standard replaces ZBJ5401688 from the date of implementation. This standard is proposed by the National Technical Committee for Standardization of Cutting Machine Tools. This standard is under the jurisdiction of the Milling Machine Branch of the National Technical Committee for Standardization of Cutting Machine Tools. The responsible drafting units of this standard are: Beijing Milling Machine Research Institute and Beijing First Machine Tool Factory. This standard was first issued in November 1988. The Standard for Static Stiffness of Lifting Table Milling Machines of the People's Republic of China stipulates the test adjustment method and common technical requirements for the lifting table bed guard. This standard is applicable to 1. Lifting table chain beds with a working table size of 200-500mm for general use. 2. Referenced Standards JB/T9929—1999 854[688] The texts contained in the following standards are referred to in this standard and constitute the provisions of this standard. When this standard was published, the inset versions shown were all valid. All standards will be revised. All parties using this standard should explore the possibility of using the latest version of the standard: GRT39331983 Essentials of Lifting Table Milling Machine
3 Method of expressing static rigidity
Static rigidity is the displacement of the workpiece relative to the tool model by the test method specified in this standard.
Test method
4.1 When the machine tool to be inspected passes the inspection according to GB/l3933, the machine tool is in a normal working state. 4.2 The installation of the force device, the test spindle and the tool model, the shear force direction and the adjustment of the force point shall be in accordance with the provisions of Figure 1, Table 1 and Figure 2, Table 2.
A test wheel: 2A tool model: 3A pair of material type 5 Figure 1 Horizontal energy bed test adjustment diagram
Approved by the State Machinery Industry Bureau on 1999-05-20 and implemented on 2000-01-01
Working width B
The distance between the main axis rotation axis and the workbench under load! The original height of the variable force point to the shaft lifting surface of the dirty rod bracket JB/T9929-[999
The distance between the vertical guide surface of the bed and the center surface of a T-shaped groove of the workbench! The straight line D
at the force point of the tool model is the diameter of the circular part of the mandrel. The force F
is projected in the horizontal plane in the longitudinal feed direction of the worktable. The horizontal projection of the tool model can be centered on the force at its center in the vertical plane. The angle between the projected force and the longitudinal feed direction of the worktable is 4.3 When adjusting the machine tool, follow the following method: d
3) Insert the mandrel with the tool model into the tapered hole of the spindle and tighten it; 1) Move the worktable to the test position : Move up to the test position with the lifting force: mm
) The worktable moves to the middle position along the weaving room, and the moving direction must be in the same direction as the force applied to the fixture model in the longitudinal projection (as shown in Figure or Figure 2)
) For horizontal milling machines, move the main beam from inside to outside to the inspection position, and install a tool rod bracket on the main beam to support the test spindle, so that the outer end surfaces of the base beam and the tool rod bracket are flush;
D For vertical milling machines, move the spindle box (or spindle sleeve) to the extreme position. If the spindle box (or spindle sleeve) can rotate, also make the spindle rotation axis vertical to the work table surface. 4.4 Installation of indicator: For horizontal milling machine, the indicator probe should be located in the horizontal axial plane and touch the edge of the end face of the tool model; For vertical milling machine, the indicator probe should be located in the vertical axial plane and touch the generatrix of the mesh surface of the tool model. 4.5 During the test, all the fire tight mails should be clamped. 4.6 During the test, the force F can be applied by the force-applying device of the dynamometer to make it reach the value specified in Table 3. 4.7 During the test, pre-test once without recording the reading, and then re-test three times, and respectively measure the displacement value shown by the indicator. The arithmetic value of the product result is calculated once, and the static displacement is calculated as follows. 2
JB/T9929-J999
A test spindle: 2-knife type
Figure 2 Vertical milling machine test adjustment diagram
. The width of the worktable in front
The short distance from the spindle end to the "worktable surface"
The extension of the seven-axis belt surface to the integral force point
The correct T-shaped distance
The spindle family shaft to the worktable cylinder
The point drop D at the force point of the tool part can be tested. The diameter of the spindle net note 2
The pure model F
The shadow of the worktable crack under force in the horizontal plane can be released in the water single need to release the energy to the tool model energy line The projection of the clamping force in the vertical plane and the clamping force in the vertical direction of the lower table are allowed to be used. The force and displacement tolerance of the tool model shall be in accordance with the provisions in Table 3. J8/T9929-1999
5.2 When testing the horizontal lifting milling machine with a rotatable worktable and the vertical lifting milling machine with a rotatable axle box (or axle sleeve), the force F and displacement tolerance of the tool model shall be in accordance with the provisions in Table 3. 3 When testing the light universal milling machine, the force F and displacement tolerance of the tool model shall be in accordance with the provisions in Table 3. Table 3
Force F of the tool model
[. 6.1
6.2 The auxiliary support between the cantilever beam and the lifting platform shall not be used during the test. S
Displacement urine filling and 5
6.3 The force applied to the tool model 1 is a spatial force that is not parallel to any coordinate system, and its line of action must intersect the center of the test spindle.
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