CN203599940U - Inner hole positioning and expanding clamp - Google Patents
Inner hole positioning and expanding clamp Download PDFInfo
- Publication number
- CN203599940U CN203599940U CN201320815581.5U CN201320815581U CN203599940U CN 203599940 U CN203599940 U CN 203599940U CN 201320815581 U CN201320815581 U CN 201320815581U CN 203599940 U CN203599940 U CN 203599940U
- Authority
- CN
- China
- Prior art keywords
- butterfly
- shaped spring
- spring piece
- thick
- thin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Images
Abstract
The utility model discloses an inner hole positioning and expanding clamp which comprises a pull rod, a thick butterfly-shaped spring piece and a thin butterfly-shaped spring piece. The large-diameter end of the pull rod is coaxially matched with the thick butterfly-shaped spring piece and the thin butterfly-shaped spring piece in a stacked mode. The thick butterfly-shaped spring piece is located on the outer layer, the thin butterfly-shaped spring piece is located on the inner layer, the sum of the diameter of the thick butterfly-shaped spring piece and the diameter of the thin butterfly-shaped spring piece is equal to the diameter of an inner hole, the end edge of the thick butterfly-shaped spring piece is separated by uniformly distributed radial open slots to form flap blocks, one of the open slots is widened to form a positioning groove, the end edge of the thin butterfly-shaped spring piece is only provided with uniformly distributed open slots, and the flap blocks formed through the radial open slots in a separated mode are identical in size. The wall thickness H of the thick butterfly-shaped spring piece is 1.0 mm-2.0 mm thicker than the wall thickness H' of the thin butterfly-shaped spring piece, and a butterfly-shaped angle alpha of the thick butterfly-shaped spring piece is 30-50 degrees larger than a butterfly-shaped angle alpha' of the thin butterfly-shaped spring piece. The butterfly-shaped spring pieces are designed in a differentiated mode, the thin butterfly-shaped spring piece with a small elastic modulus firstly deforms in an elastic mode to perform the function of positioning a workpiece, and the thick butterfly-shaped spring piece which deforms later performs the function of expanding the workpiece.
Description
Technical field
The utility model relates to a kind of Machinery Process Locating Jig, and specifically, the utility model relates to a kind of fixture with Internal hole positioning and swelling.
Background technology
External tooth gear is special because of structure, and when machined, more difficult realization is located and clamped.In order to accomplish that the form and position tolerance between bore and following process face reaches designing requirement, conventionally adopt the fixture take endoporus as positioning datum to implement machined.The butterfly spring sheet of Coaxial Superimposed is the major part of fixture for locating inner hole in groups, and butterfly spring sheet positioning precision is very high theoretically, does not often reach expection requirement in practice.The reason of the inhomogeneous elastic dilatation of butterfly spring sheet mainly contains two aspects by analysis, first be that the uniform radial slot halving precision in butterfly spring sheet edge is poor, next is the defect such as microstructure and composition segregation in the material of butterfly spring sheet own, and these reasons can affect the uniformity of the outside elastic dilatation of lobe piece being separated into by radial slot.In addition, in order to prevent the turn of the stressed generation circumferencial direction of butterfly spring sheet, the butterfly spring sheet of prior art manufacture is all provided with locating slot and only coordinates and revolve with the pin on jig main body, and locating slot structurally strengthens the inhomogeneities of each lobe elastic dilatation.Just, due to the existence of above-mentioned many reasons, butterfly spring sheet positioning precision is not high, so the common not setting element using butterfly spring sheet as high-precision positioning fixture in engineering.
Utility model content
The utility model is achieved through the following technical solutions technical goal.
Internal hole positioning swelling fixture, it is made up of jointly pull bar, thick butterfly spring sheet and thin butterfly spring sheet.Described pull bar is shoulder axle, shaft part and supporting lathe inner hole of spindle matched in clearance, and larger diameter end is coaxially matched stack thick butterfly spring sheet and thin butterfly spring sheet.Its improvements are: described thick butterfly spring sheet is positioned at skin, thin butterfly spring sheet is positioned at internal layer, both diameters equal inner hole of workpiece diameter, thick butterfly spring sheet end surface side is along being separated into lobe piece by uniform radial opening groove, an open slot is wherein widened into locating slot, and locating slot forms the adjacent lobe piece width in both sides and reduces.Thin butterfly spring sheet end surface side is along being only provided with uniform open slot, and the lobe piece of being separated by radial opening groove is measure-alike.
In said structure, the wall thickness H of thick butterfly spring sheet is than the wall thickness H of thin butterfly spring sheet ' thick 1.0mm～2.0mm, the butterfly angle α of thick butterfly spring sheet is than the butterfly angle α ' large 3 of thin type spring leaf
0～5
0.
The utility model compared with prior art, has following good effect:
1, the butterfly spring chip architecture of differential design is reasonable, makes easily;
2, the butterfly spring sheet of coaxial pairing stack is because of differential design, its outer spreading performance difference; The thin butterfly spring sheet wall thickness of internal layer is thinner, therefore good springiness and lobe piece are even, the first outer expansion of stressed back lobe piece coordinates location with inner hole of workpiece; Outer field thick butterfly spring sheet wall thickness is relatively thicker, and stressed back lobe piece strain lags behind a bit, and the lobe piece of outer expansion only plays auxiliary positioning and swelling effect.
Accompanying drawing explanation
Fig. 1 is the example structure generalized section that the utility model is done external tooth gear base Internal hole positioning and swelling.
Fig. 2 is thick butterfly spring plate plane structural representation in Fig. 1.
Fig. 3 is the profile of Fig. 2.
Fig. 4 is thin butterfly spring plate plane structural representation in Fig. 1.
Fig. 5 is the profile of Fig. 4.
The specific embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, the utility model is described in further detail.
Internal hole positioning swelling fixture shown in Fig. 1 is used for processing ring gear endoporus, and it is made up of jointly pull bar 1, thick butterfly spring sheet 2 and thin butterfly spring sheet 3.The carrier of this kind of mandrel class positioning fixture is pull bar 1, and pull bar 1 is shoulder axle, shaft part and supporting machine tool chief axis 4 endoporus matched in clearance, and larger diameter end is coaxially matched stack thick butterfly spring sheet 2 and thin butterfly spring sheet 3.The tail end of pull bar 1 is threaded shaft section, and this threaded shaft section forms follower for the craspedodrome dynamical element that connects supporting lathe.In order to reach the object of accurate location and clamping, the utility model is to the supporting differential design of butterfly spring piece collection, specific practice is to be positioned at outer field thick butterfly spring sheet 2 to adopt conventional design, the thickness H and the butterfly angle α that are thick butterfly spring sheet 2 are definite by standard regulation, and end surface side is along being separated into lobe piece 2.2 by uniform radial opening groove 2.1.In order to prevent that thick butterfly spring sheet 2 from rotating in workpiece 5 endoporus, conventionally an open slot 2.1 is wherein widened into locating slot 2.3, locating slot 2.3 only revolves by pin is spacing.Because arranging of locating slot 2.3 directly reduces the width of both sides, position adjacent petals piece 2.2, cause the lobe piece 2.2 on thick butterfly spring sheet 2 end faces different large, consequently the elastic modelling quantity of each lobe piece 2.2 is different large, and the expansive force producing when expansion is inconsistent, easily forms eccentric swelling.In the utility model, in order to improve positioning precision, will be positioned at the thin butterfly spring sheet 3 thickness H ' attenuates of internal layer, H ' is than the thin 1.0mm of thick butterfly spring sheet 2 thickness H, and its butterfly angle α ' is less by 3 than the butterfly angle α of thick butterfly spring sheet 2
0.In addition, thin butterfly spring sheet 3 end surface side are along the upper uniform open slot 3.1 that is only provided with.By above-mentioned differential design, the thick butterfly spring sheet 2 of the modular ratio of thin butterfly spring sheet 3 is little many, easier strain, and equally size of each lobe piece 3.2 sizes, the expansive force producing when expansion is even, in workpiece 5 endoporus, first plays positioning action, and next is only swelling effect.And thick butterfly spring sheet 2 is relatively larger because of elastic modelling quantity, strain lags behind, and mainly plays swelling effect and auxiliary positioning effect in structure.Although the utility model is simple in structure, configure rationally, divide the work clearly, have complementary functions, greatly improve the positioning precision of workpiece 5, the machining accuracy of workpiece 5 reaches 5 grades, improves 2 grades than prior art.
Claims (2)
1. an Internal hole positioning swelling fixture, it is made up of jointly pull bar (1), thick butterfly spring sheet (2) and thin butterfly spring sheet (3); Described pull bar (1) is shoulder axle, shaft part and supporting machine tool chief axis (4) endoporus matched in clearance, and larger diameter end is coaxially matched stack thick butterfly spring sheet (2) and thin butterfly spring sheet (3); It is characterized in that: described thick butterfly spring sheet (2) is positioned at skin, thin butterfly spring sheet (3) is positioned at internal layer, both diameters equal workpiece (5) diameter of bore, thick butterfly spring sheet (2) end surface side is along being separated into lobe piece (2.2) by uniform radial opening groove (2.1), an open slot (2.1) is wherein widened into locating slot (2.3), and locating slot (2.3) forms adjacent lobe piece (2.2) width in both sides and reduces; Thin butterfly spring sheet (3) end surface side is along being only provided with uniform open slot (3.1), and the lobe piece (3.2) of being separated by radial opening groove (3.1) is measure-alike.
2. Internal hole positioning swelling fixture according to claim 1, it is characterized in that: the wall thickness H of described thick butterfly spring sheet (2) is than the wall thickness H of thin butterfly spring sheet (3) ' thick 1.0mm～2.0mm, the butterfly angle α of thick butterfly spring sheet (2) is than the butterfly angle α ' large 3 of thin type spring leaf (3)
0～5
0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320815581.5U CN203599940U (en) | 2013-12-13 | 2013-12-13 | Inner hole positioning and expanding clamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320815581.5U CN203599940U (en) | 2013-12-13 | 2013-12-13 | Inner hole positioning and expanding clamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203599940U true CN203599940U (en) | 2014-05-21 |
Family
ID=50712639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320815581.5U Withdrawn - After Issue CN203599940U (en) | 2013-12-13 | 2013-12-13 | Inner hole positioning and expanding clamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203599940U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103692264A (en) * | 2013-12-13 | 2014-04-02 | 江苏飞船股份有限公司 | Inner bore positioning and expanding fixture |
-
2013
- 2013-12-13 CN CN201320815581.5U patent/CN203599940U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103692264A (en) * | 2013-12-13 | 2014-04-02 | 江苏飞船股份有限公司 | Inner bore positioning and expanding fixture |
| CN103692264B (en) * | 2013-12-13 | 2016-03-02 | 江苏飞船股份有限公司 | Internal hole positioning swelling fixture |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203712414U (en) | Simple dividing device | |
| CN103203489B (en) | Device and method for processing GHQ combined cycle unit guide vanes | |
| CN205147883U (en) | Clamp for drilling hole in flange plate | |
| CN102320021B (en) | Device and method for rapidly aligning numerical control (NC) machining benchmark | |
| CN102328216A (en) | Fixture for excircle finish turning and fixture processing method | |
| CN201603930U (en) | Slant hole spark-machining device | |
| CN102476328B (en) | Rotary cutter sharpening seat for cutter | |
| CN205342586U (en) | Fine special fixture that mills of high speed of small -size accurate work piece | |
| CN202388279U (en) | Rudderpost lathe fixture | |
| CN103624569A (en) | Machining clamp for split combined core mold and machining method thereof | |
| CN202377796U (en) | Numerical control turning fixture for inner outline of focusing guide ring | |
| CN103028907A (en) | Technology for processing end cap | |
| CN203599940U (en) | Inner hole positioning and expanding clamp | |
| CN108788820B (en) | Frock of lathe work back lid casing | |
| CN104400475B (en) | A kind of positioning and clamping instrument and method | |
| CN103143945B (en) | Driven device for four-axis coordinated machine tool in processing blade steam passage profile | |
| CN202278398U (en) | Positioning device used for lathing lug boss of planet carrier gear | |
| CN103692264B (en) | Internal hole positioning swelling fixture | |
| CN204934703U (en) | A kind of milling machine workpiece high accuracy fixed mechanism | |
| CN202021367U (en) | Drill jig positioning mechanism | |
| CN208467850U (en) | A kind of special fixture of lathe process eccentric shaft part | |
| CN105619137A (en) | High-speed micro-milling special clamp for small precise workpiece | |
| CN202964212U (en) | Turning positioning device for plastic shell | |
| CN102513850A (en) | Special fixture for lifting lug | |
| CN207710377U (en) | Transmission case body and its boring jig with two concurrent aces holes |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140521 Effective date of abandoning: 20160302 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |