CN104493223A - Self-expansion clamp - Google Patents
Self-expansion clamp Download PDFInfo
- Publication number
- CN104493223A CN104493223A CN201410711333.5A CN201410711333A CN104493223A CN 104493223 A CN104493223 A CN 104493223A CN 201410711333 A CN201410711333 A CN 201410711333A CN 104493223 A CN104493223 A CN 104493223A
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- CN
- China
- Prior art keywords
- mandrel
- diameter
- drill holder
- workpiece
- self
- 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.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/40—Expansion mandrels
- B23B31/404—Gripping the work or tool by jaws moving radially controlled by conical surfaces
- B23B31/4066—Gripping the work or tool by jaws moving radially controlled by conical surfaces using mechanical transmission through the spindle
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gripping On Spindles (AREA)
Abstract
The invention relates to a self-expansion clamp which is characterized by comprising a mandrel, a diameter-variable sleeve and a pressing screw nut, wherein the mandrel is provided with a taper surface; the diameter-variable sleeve sleeves the taper surface of the mandrel; the pressing screw nut is used for tightly pressing the diameter-variable sleeve to enable the diameter-variable sleeve to slide in the axial direction of the mandrel; grooves are formed in the outer wall of the diameter-variable sleeve; the grooves comprise annular grooves which are formed in the outer circumferential direction of the diameter-variable sleeve; a plurality of annular grooves are uniformly formedin the axial direction of the diameter-variable sleeve. Due to adoption of the grooves in the outer wall of the diameter-variable sleeve, a plurality of support blocks partitioned by the grooves are formed in the outer wall of the diameter-variable sleeve, a small supportsurface is formed in each supportblock, and a support block which is relatively largely stressed can be compressed in the radial direction after a workpiece is clamped, so that certain pressure can be generated between support blocks,which are relatively slightly stressed and do not contact the workpiece, and the workpiece, the contact stress area betweenthe surface of the outer wall of the diameter-variable sleeve and the workpiece is enlarged, the stress uniformity is improved, the workpiece can be stably and reliably positioned, and an independent axial positioning pressing cover structure does not need to arrange.
Description
Technical field
The present invention relates to a kind of self-expanding fixture.
Background technology
Fixture is used for rapid fastening workpiece in machining to make lathe, cutter, workpiece keeps the process unit of correct relative position, indispensable parts, along with machine tool technology is to high speed, efficiently, accurate, the development in intelligence direction, fixture be it is also proposed high-precision, efficiently, economic dispatch requirement, in prior art, what the fixture for the disk-like accessory (as gear) with centre bore was common is expansion set mandrel, expansion set mandrel generally comprises the expansion core and drill holder that are slidably matched by taper surface, compress drill holder by clamping nut make it produce radial deformation and then position workpiece, expansion set mandrel can adapt to different inner hole of workpiece sizes within the specific limits and position, but the pretightning force that the tension force that expansion set mandrel produces and operating personnel put on clamping nut is amplification relation, manual clamping pretightning force is difficult to control, easily cause locate failure, existing drill holder outer wall surface is the face of cylinder matched with inner hole of workpiece surface simultaneously, namely coordinated with inner hole of workpiece by whole surface and locate, and be subject to the restriction of machining accuracy, drill holder outer wall surface cannot be realized in actual processing contact with inner hole of workpiece face entirety, usually local clamping point and gap can all be produced, although can control in allowed band the radial positioning error of workpiece, but to the axial location less stable of workpiece, add and easily cause man-hour workpiece to trackslip and slippage, and avoid above-mentioned phenomenon usually also to need to arrange axial location gland in expansion set mandrel one end to workpiece carrying out axial grip location, cause clamp structure complicated, cost of manufacture is higher, many step clamping workpiece operations simultaneously, affect clamping workpiece and production efficiency greatly, fixture overall weight increases, and uses inconvenience, adds the labour intensity of operating personnel.
Summary of the invention
For problems of the prior art, the object of the present invention is to provide a kind of technical scheme of self-expanding fixture.
Described a kind of self-expanding fixture, is characterized in that comprising the mandrel being provided with taper face, the drill holder being set in mandrel taper face and makes it along mandrel clamp nut in axial sliding for compressing drill holder; Described drill holder outer wall is provided with groove, and described groove comprises the cannelure arranged around drill holder excircle direction, and axially evenly arrangement is multiple along drill holder for cannelure.
Described a kind of self-expanding fixture, it is characterized in that described groove also comprises the straight trough axially arranged along drill holder, straight trough is evenly arranged multiple along drill holder excircle direction.
Described a kind of self-expanding fixture, is characterized in that the bottom land place consistency of thickness of the corresponding each cannelure of described drill holder and straight trough.
Described a kind of self-expanding fixture, is characterized in that the described side stating the corresponding large end place of taper face of mandrel is provided with the radial flange for carrying out axial location to workpiece; Described self-adapting bulging sleeve clamp also comprises and is set in mandrel exterior and the packing ring being axially positioned on described radial flange place.
Described a kind of self-expanding fixture, is characterized in that described self-adapting bulging sleeve clamp also comprises and is set in mandrel exterior and the gland of pad between clamp nut and drill holder.
The present invention forms by making drill holder outer wall in drill holder outer wall machined grooves the multiple back-up blocks separated by groove, each back-up block forms a little stayed surface, the back-up block that after clamping workpiece, pressurized is relatively large can be radially compressed, and then make pressurized relatively little and produce certain pressure between the back-up block energy that do not contact with workpiece and workpiece, increase the contact area between drill holder outer wall surface and workpiece, improve stressed uniformity, reliable and stable location can be carried out to workpiece, without the need to arranging independently axial location gland structure, compared with existing expansion sleeve clamp, structure is simple, lightweight, fixture manufacturing cost can be saved, reduce labor intensity of operating staff, clamping step can also be reduced simultaneously, be beneficial to and improve clamping efficiency.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Detailed description of the invention
Below in conjunction with Figure of description, the present invention will be further described:
The present invention includes the mandrel 1 being provided with taper face, the drill holder 2 being set in mandrel 1 taper face and make it along mandrel 1 clamp nut 3 in axial sliding for compressing drill holder 2; Described drill holder 2 outer wall is provided with groove; On mandrel 1, corresponding clamp nut 3 is provided with external screw thread, multiple back-up blocks that drill holder 2 outer wall is separated by described groove, and each back-up block forms a little stayed surface.Described groove comprises the cannelure 4 arranged around drill holder 2 excircle direction, easy to process, and drill holder in the prior art is directly processed; Axially evenly arrangement is multiple along drill holder 2 for described cannelure 4, the quantity of cannelure 4 is as the criterion with the reasonable compression strength making the back-up block be separated out have can be radially compressed, certainly as far as possible many processing cannelures 4 can be separated out more back-up block, more be conducive to increasing the contact area between drill holder 2 outer wall surface and workpiece 8, improve stressed uniformity.
Described groove also comprises the straight trough (not shown) axially arranged along drill holder 2, groove can be only the cannelure 4 arranged around drill holder 2 excircle direction or the straight trough (not shown) axially arranged along drill holder 2, also the groove structure be combined into that can be described cannelure 4 with straight trough (not shown) interlock, all can realize object of the present invention, more back-up block can be separated out by the combination that interlocks of cannelure 4 and straight trough (not shown).Straight trough (not shown) is evenly arranged multiple along drill holder 2 excircle direction, the support block structure that back-up block can be made to be evenly distributed simultaneously be positioned at same circumference and compression strength uniformity good, be beneficial to the positioning precision ensureing workpiece 8.
The bottom land place consistency of thickness of the corresponding each cannelure 4 of described drill holder 2 and straight trough (not shown), is beneficial to drill holder 2 homogeneous deformation.The side at the large end place of the corresponding taper face of described mandrel 1 is provided with the radial flange 5 for carrying out axial location to workpiece 8; Described self-adapting bulging sleeve clamp also comprises that to be set in mandrel 1 outside and be axially positioned on the packing ring 6 at described radial flange 5 place.Described self-adapting bulging sleeve clamp also comprises and is set in the outside and gland 7 of pad between clamp nut 3 and drill holder 2 of mandrel 1, destroys workpiece 8 end face surface when avoiding screwing in clamp nut 3.
The present invention forms by making drill holder outer wall in drill holder outer wall machined grooves the multiple back-up blocks separated by groove, each back-up block forms a little stayed surface, the back-up block that after clamping workpiece, pressurized is relatively large can be radially compressed, and then make pressurized relatively little and produce certain pressure between the back-up block energy that do not contact with workpiece and workpiece, increase the contact area between drill holder outer wall surface and workpiece, improve stressed uniformity, reliable and stable location can be carried out to workpiece, without the need to arranging independently axial location gland structure, compared with existing expansion sleeve clamp, structure is simple, lightweight, fixture manufacturing cost can be saved, reduce labor intensity of operating staff, clamping step can also be reduced simultaneously, be beneficial to and improve clamping efficiency.
Claims (5)
1. a self-expanding fixture, is characterized in that comprising the mandrel being provided with taper face, the drill holder being set in mandrel taper face and makes it along mandrel clamp nut in axial sliding for compressing drill holder; Described drill holder outer wall is provided with groove, and described groove comprises the cannelure arranged around drill holder excircle direction, and axially evenly arrangement is multiple along drill holder for cannelure.
2. a kind of self-expanding fixture according to claim 1, it is characterized in that described groove also comprises the straight trough axially arranged along drill holder, straight trough is evenly arranged multiple along drill holder excircle direction.
3. a kind of self-expanding fixture according to claim 2, is characterized in that the bottom land place consistency of thickness of the corresponding each cannelure of described drill holder and straight trough.
4. a kind of self-expanding fixture according to claim 1 or 2 or 3, is characterized in that the described side stating the corresponding large end place of taper face of mandrel is provided with the radial flange for carrying out axial location to workpiece; Described self-adapting bulging sleeve clamp also comprises and is set in mandrel exterior and the packing ring being axially positioned on described radial flange place.
5. a kind of self-expanding fixture according to claim 1 or 2 or 3, is characterized in that described self-adapting bulging sleeve clamp also comprises and is set in mandrel exterior and the gland of pad between clamp nut and drill holder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410711333.5A CN104493223A (en) | 2014-12-01 | 2014-12-01 | Self-expansion clamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410711333.5A CN104493223A (en) | 2014-12-01 | 2014-12-01 | Self-expansion clamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104493223A true CN104493223A (en) | 2015-04-08 |
Family
ID=52934723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410711333.5A Pending CN104493223A (en) | 2014-12-01 | 2014-12-01 | Self-expansion clamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104493223A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108145024A (en) * | 2017-12-29 | 2018-06-12 | 宁波市精恒凯翔机械有限公司 | One kind can position inner intumescence type rolling tools |
| WO2019001063A1 (en) * | 2017-06-28 | 2019-01-03 | 京东方科技集团股份有限公司 | Fastening device and operation method thereof, and display panel |
| CN109434136A (en) * | 2018-12-21 | 2019-03-08 | 歌尔股份有限公司 | For processing the processing method and internal stay tool of internal stay tool |
| CN112059226A (en) * | 2020-08-11 | 2020-12-11 | 大连理工大学 | Adjustable hydraulic expansion mandrel and method |
-
2014
- 2014-12-01 CN CN201410711333.5A patent/CN104493223A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019001063A1 (en) * | 2017-06-28 | 2019-01-03 | 京东方科技集团股份有限公司 | Fastening device and operation method thereof, and display panel |
| US11249243B2 (en) | 2017-06-28 | 2022-02-15 | Boe Technology Group Co., Ltd. | Fastening device and method of operating same, and display panel |
| CN108145024A (en) * | 2017-12-29 | 2018-06-12 | 宁波市精恒凯翔机械有限公司 | One kind can position inner intumescence type rolling tools |
| CN108145024B (en) * | 2017-12-29 | 2024-01-26 | 宁波市精恒凯翔机械有限公司 | Positionable internal expansion type rolling tool |
| CN109434136A (en) * | 2018-12-21 | 2019-03-08 | 歌尔股份有限公司 | For processing the processing method and internal stay tool of internal stay tool |
| CN112059226A (en) * | 2020-08-11 | 2020-12-11 | 大连理工大学 | Adjustable hydraulic expansion mandrel and method |
| CN112059226B (en) * | 2020-08-11 | 2021-07-16 | 大连理工大学 | Adjustable hydraulic expansion mandrel and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150408 |