CN207915135U - A kind of main shaft housing outer diameter superfine milling special tooling - Google Patents
A kind of main shaft housing outer diameter superfine milling special tooling Download PDFInfo
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- CN207915135U CN207915135U CN201721872359.3U CN201721872359U CN207915135U CN 207915135 U CN207915135 U CN 207915135U CN 201721872359 U CN201721872359 U CN 201721872359U CN 207915135 U CN207915135 U CN 207915135U
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- shell
- mandrel
- pressing plate
- outer diameter
- annular convex
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Abstract
A kind of main shaft housing outer diameter superfine milling special tooling, including mandrel, shell and pressing plate, one end of mandrel is equipped with annular convex platform I, pressing plate is set in the other end of mandrel, it is equipped with convex shoulder far from pressing plate one end on annular convex platform I, shell is set on mandrel, and fastening nut is connected on the mandrel on the outside of pressing plate, by the direction turn fastening nut to shell, shell is made to be folded between pressing plate and convex shoulder；Wherein, the rolling bushing being also arranged on mandrel between I outer wall of annular convex platform and inner walls, rolling bushing is circumferentially with multiple pocket holes being radially arranged, it is rolled in pocket hole and is embedded with steel ball, the outer diameter of the internal diameter of shell, steel ball and annular convex platform I passes through interference fit and carries out location and installation.Rolling bushing is added in the utility model between mandrel and shell, and housing inner diameter, steel ball and outside diameter of mandrel carry out location and installation by interference fit, positioning accuracy can be made to be increased within 0.002mm.
Description
Technical field
The utility model is related to technical field of machine tool spindle, and in particular to a kind of main shaft housing outer diameter superfine milling special tool
Dress.
Background technology
Superfine grinding is the method for grinding that can reach minimum grinding surface roughness value and highest machining accuracy in the present age.Shell
Body class part is the common a kind of part of machine industry, is had a wide range of application, and has very big difference in structure, but it is common
The characteristics of be mainly shown as：The more demanding inside and outside surface of revolution of concentricity, length are more than diameter.Main shaft housing is as support
It is mounted in Machine tool box body with positioning action, the structure of main shaft housing is smart with mutual alignment to be ensured is closed with internal revolving meber
Degree, the concentricity of inside and outside circle is generally more demanding, is often 0.002-0.005mm, and outer round surface roughness Ra is 0.8-0.4 μm,
Both ends of the surface and the verticality of shell axis are 0.0025mm, are seen shown in attached drawing 1.
When grinding shell part outer surface, and when inside and outside circle has concentricity requirement, mandrel and Finishing Parts Machining can be used
Endoporus afterwards is as positioning datum, superfine milling external diameter surface.The prior art is when being ground housing outer diameter, using wearing omnipotent mandrel
Technique is ground, and is felt relieved using outside diameter of mandrel and shell inner hole, and compressed by tool at shell both ends.Wherein, core
Axis and workpiece hole generally use the clearance fit of H7/h6, H7/g6, the tool that both ends compress and the clearance control of shell bore to exist
Within the scope of 0.05-0.1mm, shell workpiece can be easily sleeved on mandrel.But due to being gap-matched, concentricity is poor,
Therefore centering housing outer diameter is also needed, ensure that bounce is less than 0.01mm, can just carry out grinding.This processing method requires shell
Outer diameter and two outer end faces have higher verticality, so clamping generally requires to take considerable time, low production efficiency, it is also difficult to protect
Machining accuracy is demonstrate,proved, installation bounce precision minimum reaches 0.02mm.For this reason, it may be necessary to design specialized tooling.
Utility model content
The purpose of this utility model is to provide a kind of main shaft housing outer diameter superfine milling special tooling, can improve production effect
Rate and machining accuracy.
The utility model technical solution used for the above purpose is：A kind of main shaft housing outer diameter superfine milling is special
It is equipped with annular convex platform I with one end of tooling, including mandrel, shell and pressing plate, mandrel, pressing plate is set in the other end of mandrel, ring
The outer rim far from pressing plate one end is equipped with the convex shoulder being arranged circumferentially on shape boss I, and shell is set on mandrel, makes the end of shell one end
Face is connected on convex shoulder, and the end face of the shell other end is connected on pressing plate, is connected through a screw thread on the mandrel on the outside of pressing plate
There is fastening nut, by the direction turn fastening nut to shell, shell is made to be folded between pressing plate and convex shoulder；Wherein, core
The rolling bushing being also arranged on axis between I outer wall of annular convex platform and inner walls, being circumferentially with for rolling bushing are multiple
The pocket hole being radially arranged rolls in pocket hole and is embedded with steel ball, and the outer diameter of the internal diameter of shell, steel ball and annular convex platform I passes through
Interference fit carries out location and installation.
Wherein, the side wall being oppositely arranged with fastening nut on pressing plate is equipped with the annular convex platform II stretched into shell, shell
The crest clearance of internal diameter and annular convex platform II coordinate.
Preferably, the value of interference fit between the internal diameter of shell, steel ball and the outer diameter of annular convex platform I is 0.0015-
0.008mm。
Wherein, pressing plate is rounded, and the outer diameter of pressing plate and the outer diameter of convex shoulder are respectively less than the outer diameter of shell.
Preferably, rolling bushing is less than length of the annular convex platform I along mandrel axial direction along the length of mandrel axial direction.
Advantageous effect：Rolling bushing is added in the tooling of the utility model between mandrel and shell, as shown in Figure 3.Shell
Internal diameter, steel ball and outside diameter of mandrel carry out location and installation by interference fit, positioning accuracy can be made to be increased within 0.002mm；It keeps away
The radial-play for exempting from shell ensure that the concentricity of shell and mandrel, can reach higher concentricity processing request；Fastening nut
After locking, superfine milling can be carried out by no longer needing to the bounce of centering outer diameter, improve production efficiency and machining accuracy.
Description of the drawings
Fig. 1 is the parameter request of main shaft housing in the prior art；
Fig. 2 is the schematic diagram of the utility model；
Fig. 3 is the rolling bushing structural schematic diagram in the utility model；
Fig. 4 is the sectional view along line A-A in Fig. 3；
Fig. 5 is the enlarged diagram of this mark of Fig. 4 I.
Reference numeral：1, fastening nut, 2, pressing plate, 3, shell, 4, rolling bushing, 40, pocket hole, 5, mandrel, 6, steel ball, 7,
Annular convex platform I, 8, convex shoulder, 9, annular convex platform II.
Specific implementation mode
To make technological means of the utility model, creation characteristic and the purpose reached be easy to understand, with reference to
The utility model is expanded on further in schematic diagram, but the utility model range claimed is not limited to specific embodiment party
Range described in formula.
Positioning datum is installed since housing outer diameter is used as, therefore the concentricity and end face between housing part surfaces externally and internally and hole
The verticality of axis generally has higher requirements.For guarantee these requirements, the utility model combines practice, adds from technique and reality
It is accounted in work situation, devises a kind of main shaft housing outer diameter superfine milling special tooling, which can also be in normal cylindrical
High-precision grinding is carried out to housing outer diameter on grinding machine.
As shown in Figure 1, for the shell structure of the prior art, the concentricity of inside and outside circle is generally 0.002-0.005mm, outer circle
Surface roughness Ra is 0.8-0.4 μm, and the verticality of both ends of the surface and shell axis is 0.0025mm.
A kind of main shaft housing outer diameter superfine milling special tooling, as shown in Fig. 2, including mandrel 5, shell 3 and pressing plate 2, core
One end of axis 5 is equipped with annular convex platform I 7, and pressing plate 2 is set in the other end of mandrel 5, far from 2 one end of pressing plate on annular convex platform I 7
Outer rim is equipped with the convex shoulder 8 being arranged circumferentially, and shell 3 is set on mandrel 5, and the end face of 3 one end of shell is made to contradict in the left side of convex shoulder 8
In the vertical side face, the end face of 3 other end of shell contradicts on 2 right vertical end face of pressing plate.
Wherein, pressing plate 2 is rounded, and the upright side walls being oppositely arranged with fastening nut 1 on pressing plate 2 are equipped with and stretch into shell 3
Interior annular convex platform II 9, the internal diameter of shell 3 coordinate with the crest clearance of annular convex platform II 9.
The outer diameter of pressing plate 2 and the outer diameter of convex shoulder 8 are respectively less than the outer diameter of shell 3, and the outer diameter of pressing plate 2 and the outer diameter of convex shoulder 8 are equal
More than the internal diameter of shell 3, it is connected through a screw thread fastening nut 1 on the mandrel 5 in 2 outside of pressing plate, by the side of shell 3
To turn fastening nut 1, i.e. direction turn fastening nut 1 in Fig. 2 from left to right makes shell 3 be folded in pressing plate 2 and convex shoulder
Between 8.
Wherein, the rolling bushing 4 being also arranged on mandrel 5 between 3 inner wall of I 7 outer wall of annular convex platform and shell rolls
Guide sleeve 4 is less than annular convex platform I 7 along the axial length of mandrel 3 along the axial length of mandrel 3.As shown in Fig. 3, Fig. 4 and Fig. 5, roll
Guide sleeve 4 is circumferentially with multiple pocket holes 40 being radially arranged, and is rolled in pocket hole 40 and is embedded with steel ball 6, the internal diameter of shell 3,
Steel ball 6 and the outer diameter of annular convex platform I 7 carry out location and installation by interference fit.Pass through steel between mandrel 5 and rolling bushing 4
Ball 6 realizes that interference rolls cooperation.Preferably, the interference fit between the internal diameter of shell 3, steel ball 6 and the outer diameter of annular convex platform I 7
Amount is 0.0015-0.008mm.Wherein, i.e., pocket hole 40 along rolling bushing 4 axial direction it is point multiple rows of be evenly distributed, adjacent two rows of circles
Circumferential direction is staggered 6 °, it is preferred that the circumferential surface of rolling bushing 4 is equipped with the pocket hole 40 of five row's circumferential directions arrangement；The pocket hole of adjacent row interlocks
Setting, and the spacing between the center in adjacent row pocket hole is identical, i.e. L in Fig. 42With L3It is equal, the leftmost side and the rightmost side in Fig. 4
The distance of the respective outer rim of adjacent rolling bushing 4 of centre distance in the pocket hole of circumferential direction arrangement is equal；Preferably, L1：L2：L3=5：
13：13；Steel ball 6 is riveted in pocket hole 40, rotation is flexible, does not deviate from.
It is processed by actual production, the superfine milling which is suitable for shell part outer diameter is processed, this is used
After tooling, the clamping efficiency and machining accuracy of part all significantly improve, and entirely reach the technology requirement of drawing.
It, can be to bearing thermal stretching due to also to use rolling bushing as the radial support of rear bearing in main shaft internal structure
Deformation play the guiding role, so the rolling bushing of tooling need not redesign, uses former part.Rolling bushing
Steel ball uses Encryption Design, and the support stiffness and positioning accurate of whole system can be improved by increasing the axially distributed quantity of steel ball
Degree.
In Fig. 2, pressing plate 2, rolling bushing 4, mandrel 5, annular convex platform I 7, convex shoulder 8 and annular convex platform II 9 central axis weight
Close setting.
In the description of the present invention, it should be noted that the side of the instructions such as term "vertical", " left side ", " right side "
Position or position relationship are to be merely for convenience of description the utility model based on orientation or positional relationship shown in Fig. 2 and simplification is retouched
It states, does not indicate or imply the indicated device or element must have a particular orientation, with specific azimuth configuration and behaviour
Make, therefore should not be understood as limiting the present invention.In addition, term " I ", " II " are used for description purposes only, and cannot manage
Solution is instruction or implies relative importance.
Other not described contents of the utility model belong to the prior art.
Above example makes in order to illustrate the technical solution of the utility model, and the purpose is to be to make those skilled in the art
The content of the utility model can be understood and be practiced, but the scope of protection of the utility model is not limited with this.It is every according to
The equivalent changes or modifications made according to the substantive content of the utility model, should all cover in the scope of protection of the utility model
It is interior.
Claims (5)
1. a kind of main shaft housing outer diameter superfine milling special tooling, it is characterised in that：Including mandrel, shell and pressing plate, mandrel
One end is equipped with annular convex platform I, and pressing plate is set in the other end of mandrel, and the outer rim far from pressing plate one end is equipped with ring on annular convex platform I
To the convex shoulder of setting, shell is set on mandrel, and the end face of shell one end is made to be connected on convex shoulder, and the end face of the shell other end is supported
It is connected on pressing plate, fastening nut has been connected through a screw thread on the mandrel on the outside of pressing plate, it is tight by the direction turn to shell
Gu nut makes shell be folded between pressing plate and convex shoulder；
Wherein, the rolling bushing being also arranged on mandrel between I outer wall of annular convex platform and inner walls, the week of rolling bushing
It is embedded with steel ball, internal diameter, steel ball and the annular convex platform I of shell to being rolled equipped with multiple pocket holes being radially arranged, in pocket hole
Outer diameter pass through interference fit carry out location and installation.
2. a kind of main shaft housing outer diameter superfine milling special tooling according to claim 1, it is characterised in that：On pressing plate with
The side wall that fastening nut is oppositely arranged, which is equipped with, stretches into annular convex platform II in shell, and the internal diameter of shell is outer with annular convex platform II
Diameter clearance fit.
3. a kind of main shaft housing outer diameter superfine milling special tooling according to claim 1, it is characterised in that：Shell it is interior
Value of interference fit between diameter, steel ball and the outer diameter of annular convex platform I is 0.0015-0.008mm.
4. a kind of main shaft housing outer diameter superfine milling special tooling according to claim 1, it is characterised in that：Pressing plate is in circle
Shape, the outer diameter of pressing plate and the outer diameter of convex shoulder are respectively less than the outer diameter of shell.
5. a kind of main shaft housing outer diameter superfine milling special tooling according to claim 1, it is characterised in that：Rolling bushing
It is less than length of the annular convex platform I along mandrel axial direction along the length of mandrel axial direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721872359.3U CN207915135U (en) | 2017-12-28 | 2017-12-28 | A kind of main shaft housing outer diameter superfine milling special tooling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721872359.3U CN207915135U (en) | 2017-12-28 | 2017-12-28 | A kind of main shaft housing outer diameter superfine milling special tooling |
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| Publication Number | Publication Date |
|---|---|
| CN207915135U true CN207915135U (en) | 2018-09-28 |
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| CN201721872359.3U Active CN207915135U (en) | 2017-12-28 | 2017-12-28 | A kind of main shaft housing outer diameter superfine milling special tooling |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112338703A (en) * | 2020-09-30 | 2021-02-09 | 天津津航技术物理研究所 | Method and tool for polishing inner wall and outer wall of circular-ring-cylinder-shaped optical part |
-
2017
- 2017-12-28 CN CN201721872359.3U patent/CN207915135U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112338703A (en) * | 2020-09-30 | 2021-02-09 | 天津津航技术物理研究所 | Method and tool for polishing inner wall and outer wall of circular-ring-cylinder-shaped optical part |
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