CN204673341U - Not rounded Internal periphery many curved surfaces quick centring fixture - Google Patents
Not rounded Internal periphery many curved surfaces quick centring fixture Download PDFInfo
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- CN204673341U CN204673341U CN201520399471.4U CN201520399471U CN204673341U CN 204673341 U CN204673341 U CN 204673341U CN 201520399471 U CN201520399471 U CN 201520399471U CN 204673341 U CN204673341 U CN 204673341U
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- curved surfaces
- internal periphery
- many curved
- workpiece
- rounded internal
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Abstract
The utility model discloses a kind of not rounded Internal periphery many curved surfaces quick centring fixture, for carrying out centering processing in it with the workpiece of the many curved surfaces of not rounded Internal periphery, this fixture comprises the plug be arranged on lathe, and described plug is positive polygon prism structure, the diameter phi Jmin of the minimum inscribed circle of described plug is less than the minimum inscribed circle diameter φ Gmin of the many curved surfaces of not rounded Internal periphery on described workpiece, described plug maximum circumscribed circle diameter φ Jmax is less than the maximum circumscribed circle diameter φ Gmax of the many curved surfaces of not rounded Internal periphery on described workpiece, on described workpiece, the minimum inscribed circle diameter φ Gmin of the many curved surfaces of not rounded Internal periphery is less than the maximum circumscribed circle diameter φ Jmax of described plug.This fixture accurately can locate the symmetrical center line of the many curved surfaces of not rounded Internal periphery in workpiece to be machined, thus ensures Workpiece Machining Accuracy.
Description
Technical field
The utility model relates to a kind of fixture, specifically a kind of not rounded Internal periphery many curved surfaces quick centring fixture.
Background technology
Mechanical engineering neighborhood is due to workpiece technique or operation principle requirement, except a large amount of part forming face is circle, or plane also have outward quite a few can make a kind of with center or, the axially symmetrical many curved surfaces of Internal periphery, because many curved surface profiles and machining tool clamping benchmark job point (face) cannot be determined on the design basis point (face) of curved surface, therefore must Design assistant fixture.
In rotor-type oil pump, the processing of internal rotor and outer rotor part is a typical case, Fig. 1 is the structural representation of conventional lubricating oil pump, and wherein, 11 represent oil pump body, 12 represent outer rotor, 3 represent internal rotor, and 4 represent oil pump cover, and 5 represent sealing ring, 6 represent bearing, 7 represent that machine oil pump shaft 8 represents key, and 9 represent drive pulley, and 10 represent lock nut.Wherein, outer rotor 12 has the central shaft hole of the many curve forms of not rounded Internal periphery (it specifically comprises five external tooth curved surface 5a, as Fig. 4), and the many curved surfaces of not rounded Internal periphery on this outer rotor are axially symmetric structure.Internal rotor 3 has the many curve forms of not rounded outline, and (it specifically comprises four external tooth curved surface 3a, as Fig. 4) outside wall surface, and the many curved surfaces of not rounded outline of this internal rotor also centered by symmetrical structure, run through in internal rotor 3 simultaneously and be provided with a central shaft hole, i.e. the pump shaft hole 3b of internal rotor.Wherein, in the tooth number Z of internal rotor >=4, outside the tooth number Z of outer rotor=and Z interior+1, as Fig. 2.
When this lubricating oil pump works, machine oil pump shaft drives internal rotor to rotate, and internal rotor then drives outer rotor to turn in the same direction.Profile due to inner and outer Rotator working face is a pair conjugate curves, neither interferes and also do not depart from when therefore can ensure that two rotors engage each other.The inner chamber of outer rotor is divided into four working chambers by the contact point between inner and outer rotors.When a certain working chamber turns over oil-in, volume increases, and produce vacuum, machine oil is inhaled in working chamber through oil-in.When this working chamber turns over inlet port, volume reduces, and oil pressure raises, and machine oil is forced out through oil-out.
During inner and outer Rotator work, same direction is rotated, and in fig. 2, the pump shaft hole 3b of the internal rotor 3 and external tooth curved surface 3a of internal rotor has axiality requirement, and internal rotor center line and internal rotor end face have perpendicularity requirement.The internal tooth curved surface 12a of outer rotor and the circular outer wall face 12b of outer rotor has axiality requirement, and outer rotor center line and outer rotor end face have perpendicularity requirement.
Rotor rotates the friction of mutual relative sliding and therefore requires and the requirement of Precision Rough degree rotor wearability in pump, current rotor adopts the method for powder metallurgy to manufacture, because powder metallurgy size distortion in process that is shaping and that sinter is comparatively large, processing is therefore also needed to reach dimension precision requirement and roughness requirements.
Utility model content
The utility model object is: for the problems referred to above, provides a kind of not rounded Internal periphery many curved surfaces quick centring fixture, accurately to locate the symmetrical center line of the many curved surfaces of not rounded Internal periphery in workpiece to be machined, ensures Workpiece Machining Accuracy.
The technical solution of the utility model is: a kind of not rounded Internal periphery many curved surfaces quick centring fixture, for carrying out centering processing in it with the workpiece of the many curved surfaces of not rounded Internal periphery, this fixture comprises the plug be arranged on lathe, and described plug is positive polygon prism structure, the diameter phi Jmin of the minimum inscribed circle of described plug is less than the minimum inscribed circle diameter φ Gmin of the many curved surfaces of not rounded Internal periphery on described workpiece, described plug maximum circumscribed circle diameter φ Jmax is less than the maximum circumscribed circle diameter φ Gmax of the many curved surfaces of not rounded Internal periphery on described workpiece, on described workpiece, the minimum inscribed circle diameter φ Gmin of the many curved surfaces of not rounded Internal periphery is less than the maximum circumscribed circle diameter φ Jmax of described plug.
The utility model, on the basis of technique scheme, also comprises following preferred version:
Described workpiece is the outer rotor of rotor-type oil pump.
Described plug is positive pentagonal prism structure.
Described Mandrel Rotating is arranged on described lathe.
The utility model has the advantages that:
1, this quick centring of the utility model fixture can ensure with the many curves of not rounded Internal periphery for benchmark processes satisfactory part.
2, this quick centring of the utility model fixture is positive polygon prism structure, and the dimensional accuracy of fixture itself is high, and handling ease is simple.
3, this quick centring clamp workpiece of the utility model convenient mounting and clamping is quick, and production efficiency is high.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of rotor-type oil pump;
Fig. 2 is the cross section structure schematic diagram of inner and outer rotors in rotor-type oil pump;
Fig. 3 is the using method demonstration graph of not rounded Internal periphery many curved surfaces quick centring fixture in the utility model embodiment;
Fig. 4 is the size comparison figure of not rounded Internal periphery many curved surfaces quick centring fixture and workpiece to be processed in the utility model embodiment.
Wherein: 1-workpiece, the many curved surfaces of not rounded Internal periphery on 1a-workpiece, the circular outer wall face of 1b-workpiece, 2-plug, 3-internal rotor, the external tooth curved surface of 3a-internal rotor, the pump shaft hole of 3b-internal rotor, 4-oil pump cover, 5-sealing ring, 6-bearing, 7-machine oil pump shaft, 8-key, 9-drive pulley, 10-lock nut, 11-oil pump body, 12-outer rotor, the internal tooth curved surface of 12a-outer rotor, the circular outer wall face of 12b-outer rotor.
Detailed description of the invention
Below in conjunction with specific embodiment, such scheme is described further.Should be understood that this embodiment is not limited to for illustration of the utility model limit scope of the present utility model.The implementation condition adopted in embodiment can do further adjustment according to the condition of concrete producer, and not marked implementation condition is generally the condition in normal experiment.
Fig. 3 and Fig. 4 shows a specific embodiment of this not rounded Internal periphery of the utility model many curved surfaces quick centring fixture, it is for carrying out centering processing to the workpiece 1 with the many curved surfaces of not rounded Internal periphery in it, on described workpiece, not rounded Internal periphery many curved surfaces 1a is axially symmetric structure, it has the central axis as symmetrical centre, and this fixture specifically for processing the circular outer wall face with not rounded Internal periphery many curved surfaces 1a coaxial line on workpiece on workpiece 1.This example is specifically described for the outer rotor of the lubricating oil pump introduced in background technology, and the workpiece 1 namely described in this example is same parts with the lubricating oil pump outer rotor described in background technology.
This quick centring fixture of the present embodiment comprises the plug 2 be arranged on lathe, and described plug 2 is positive polygon prism structure, the diameter phi Jmin of the minimum inscribed circle of described plug 2 is less than the minimum inscribed circle diameter φ Gmin of the upper not rounded Internal periphery many curved surfaces 1a of described workpiece 1 (this example is specially the outer rotor of lubricating oil pump), described plug 2 maximum circumscribed circle diameter φ Jmax is less than the maximum circumscribed circle diameter φ Gmax of not rounded Internal periphery many curved surfaces 1a on described workpiece 1, on described workpiece 1, the minimum inscribed circle diameter φ Gmin of not rounded Internal periphery many curved surfaces 1a is less than the maximum circumscribed circle diameter φ Jmax of described plug 2.As Fig. 4.
Refer again to shown in Fig. 3 and Fig. 4, now the using method of this for the present embodiment quick centring fixture is described below: during practical application, first workpiece 1 (at this moment the circular outer wall face 1b also unshaped of workpiece 1) to be processed is enclosed within outside plug 2, as the circular outer wall face 1b of lathe turning processing work 1, workpiece 1 and plug 2 relatively rotate, thus make workpiece 1 and plug 2 along the circumferential direction monodirectional locking locate and clamp, at this moment on workpiece 1 not rounded Internal periphery many curved surfaces 1a symmetrical center line will with the central axes (automatic centering) of positive pentagonal prism plug 2, like this we with the central axis of plug 2 (because plug 2 is positive pentagonal prism structure, therefore the position of its central axis is easy to determine) centered by carry out processing work 1 circular outer wall face 1b just become very simple and convenient, and can ensure that the central axis of circular outer wall face 1b of workpiece precisely overlaps (automatic centering) with the central axis of not rounded Internal periphery many curved surfaces 1a on workpiece.So have the following advantages: during the circular outer wall face 1b of 1) processing work, the axiality of outside wall surface and Internal periphery curved surface can be ensured, 2) side end face of processing work time, the perpendicularity of workpiece end face and central axis can be ensured.And after machining, rotate backward plug 2 and can take off workpiece 1, very convenient.That side end face processed by outer rotor is that benchmark is regrinded out the depth of parallelism of opposite side end face, both guarantees.
Certainly, when practical application, also may process other structures distributed with not rounded Internal periphery many curved surfaces 1a coaxial line of workpiece on workpiece 1, the circular groove such as coaxially distributed with Internal periphery curved surface, is not limited to the said circular outer wall face of the present embodiment.
We also can by described plug 2 rotary setting on lathe, after workpiece 1 to be processed is enclosed within plug 2, operating personnel can rotate plug 2 thus workpiece 1 is clamped with plug 2 circumference, complete the pre-determined bit of workpiece and plug, carry out the processing of follow-up circular outer wall face and end face afterwards again.
Due to the outer rotor that the workpiece 1 will processed in this example is with five internal tooth curved surfaces, therefore described plug 2 also adopts positive pentagonal prism structure accordingly.If the workpiece processed 1 is other versions, so the rib number of plug 2 also will adjust accordingly, such as positive six prisms, positive seven prisms etc.
Said in the present embodiment " plug 2 is positive polygon prism structure " is not that the whole excellent section of plug 2 must be all positive polygon prism shape, if plug 2 and workpiece to be processed 1 coordinate Duan Weizheng polygon prism shape.
Certainly, above-described embodiment, only for technical conceive of the present utility model and feature are described, its object is to people can be understood content of the present utility model and implement according to this, can not limit protection domain of the present utility model with this.All equivalent transformations of doing according to the Spirit Essence of the utility model main technical schemes or modification, all should be encompassed within protection domain of the present utility model.
Claims (4)
1. not rounded Internal periphery many curved surfaces quick centring fixture, for carrying out centering processing to the workpiece (1) with the many curved surfaces of not rounded Internal periphery in it, it is characterized in that: this fixture comprises the plug (2) be arranged on lathe, and described plug (2) is the minimum inscribe diameter of a circle of positive polygon prism structure, described plug (2)
be less than the minimum inscribed circle diameter of the upper many curved surfaces of not rounded Internal periphery (1a) of described workpiece (1)
described plug (2) maximum circumscribed circle diameter
be less than the maximum circumscribed circle diameter of the upper many curved surfaces of not rounded Internal periphery (1a) of described workpiece (1)
the minimum inscribed circle diameter of the upper many curved surfaces of not rounded Internal periphery (1a) of described workpiece (1)
be less than the maximum circumscribed circle diameter of described plug (2)
2. not rounded Internal periphery many curved surfaces quick centring fixture according to claim 1, is characterized in that: the outer rotor that described workpiece (1) is rotor-type oil pump.
3. not rounded Internal periphery many curved surfaces quick centring fixture according to claim 1, is characterized in that: described plug (2) is positive pentagonal prism structure.
4. not rounded Internal periphery many curved surfaces quick centring fixture according to claim 1, is characterized in that: described plug (2) rotary setting is on described lathe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520399471.4U CN204673341U (en) | 2015-06-11 | 2015-06-11 | Not rounded Internal periphery many curved surfaces quick centring fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520399471.4U CN204673341U (en) | 2015-06-11 | 2015-06-11 | Not rounded Internal periphery many curved surfaces quick centring fixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204673341U true CN204673341U (en) | 2015-09-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520399471.4U Expired - Fee Related CN204673341U (en) | 2015-06-11 | 2015-06-11 | Not rounded Internal periphery many curved surfaces quick centring fixture |
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| Country | Link |
|---|---|
| CN (1) | CN204673341U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110260762A (en) * | 2019-07-09 | 2019-09-20 | 中国航发哈尔滨东安发动机有限公司 | A kind of outer rotor part inner mold face precision measurement method |
| CN112059188A (en) * | 2020-09-02 | 2020-12-11 | 苏州萨伯工业设计有限公司 | Control method based on powder metallurgy rotor manufacturing process |
-
2015
- 2015-06-11 CN CN201520399471.4U patent/CN204673341U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110260762A (en) * | 2019-07-09 | 2019-09-20 | 中国航发哈尔滨东安发动机有限公司 | A kind of outer rotor part inner mold face precision measurement method |
| CN112059188A (en) * | 2020-09-02 | 2020-12-11 | 苏州萨伯工业设计有限公司 | Control method based on powder metallurgy rotor manufacturing process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150930 Termination date: 20180611 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |