CN102862077A - Combined pneumatic chuck - Google Patents
Combined pneumatic chuck Download PDFInfo
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- CN102862077A CN102862077A CN2012103870144A CN201210387014A CN102862077A CN 102862077 A CN102862077 A CN 102862077A CN 2012103870144 A CN2012103870144 A CN 2012103870144A CN 201210387014 A CN201210387014 A CN 201210387014A CN 102862077 A CN102862077 A CN 102862077A
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- positioning ring
- ball
- outer positioning
- ring
- air
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Abstract
The invention relates to a combined pneumatic chuck, in particular to a chuck used for simultaneously fixing a plurality of automated Enova electrodes. The combined pneumatic chuck mainly comprises a base (2), a clamping mechanism (4) and a pneumatic mechanism, wherein the clamping mechanism (4) is composed of roll balls (9), an inner positioning ring (7), an outer positioning ring (6), a spring (8) and the like. When the combined pneumatic chuck works, gravity effect of the outer positioning ring (6) and elasticity effect of the spring (8) are used for downward pressing the roll balls (9) to be clamped in a roll ball installation hole (16) of the inner positioning ring (7) so as to achieve the purpose of locking the electrodes. During aeration, after air raises the outer positioning ring (6) and the spring (8), the roll balls (9) draw back, the locking state of the electrodes is eliminated, and the purpose of part demounting is achieved. The combined pneumatic chuck facilitates clamping and demounting of the electrodes, can ensure processing accuracy of the electrodes, improves machine use ratio and reduces working hour loss.
Description
Technical field
The present invention relates to a kind of air spider mechanism, especially relate to a kind of combined pneumatic chuck, can be used for fixing simultaneously a plurality of automation Yi Nuowa electrodes.
Background technology
Chuck is the setting tool that is usually used in the CNC milling machine machined electrode, and its quality quality directly affects the machining accuracy of electrode.Common way is manually electrode to be locked at chuck in this area at present, relies on the perception of operating personnel's hand and the operation that strength is finished the locking electrode.The inferior position of manual locking is apparent, is that mainly the locking degree of chuck can be different because of individual difference, may cause partial electrode not become flexible because there being enough tight locks in process during operation, produces defective products; Simultaneously, manual locking also can't guarantee the homogeneity of all accuracy of electrode processings.
In addition; at present in the art, chuck use be with single as unit, namely in the electrode process, can only singlely process; the gap machinery requirement of each electrode processing is shut down another electrode of clamping, and this situation has caused utilization rate reduction, the loss in man-hour of machine.
Summary of the invention
The purpose of this invention is to provide a kind of air spider that can fix simultaneously a plurality of automation Yi Nuowa electrodes, and can realize the gentle function of tearing electrode open of auto lock.
In order to address the above problem, the present invention includes: a base; Be fixedly mounted on an above catch mechanism on the described base, described catch mechanism comprises: interior locating ring, its ring wall are provided with the ball installing hole for accommodating ball; Outer positioning ring, it is sleeved on the described interior locating ring, and can between the first operating position on the described interior locating ring and the second operating position, come and go vertically mobile, wherein, when the first operating position, the described ball of selection area pushing tow on the described outer positioning ring, and the setting regions on the described ball is stretched in the inner chamber of interior locating ring, and when the second operating position, selection area on the described outer positioning ring and described ball break away from, and the setting regions on the described ball is withdrawed from from the inner chamber of interior locating ring; And for the pneumatic mechanism that drives outer positioning ring, described pneumatic mechanism comprises the air ducting system of being located in the base, and described air ducting system is communicated with source of the gas.
As one of preferred version, also be provided with a housing on the described base, be provided with accommodation space between described housing and the interior locating ring, and described at least outer positioning ring bottom is located in the described accommodation space, and be sealed and matched with described inner walls and interior locating ring outer wall respectively, thereby form the air-tight chamber of variable volume in described accommodation space, described air-tight chamber is communicated with described air ducting system.
As one of preferred version, described air ducting system comprises the air drain that is distributed in the base upper surface and the air flue that is distributed in the base, and described air drain is communicated with source of the gas through air flue, and described air drain is located in the described air-tight chamber.
As one of preferred version, described outer positioning ring and interior locating ring all are located in the described housing, and described outer positioning ring, interior locating ring arrange with housing is concentric.
As one of preferred version, described air drain adopts the ring cylinder air drain with described outer positioning ring and the concentric setting of interior locating ring, and the ring of described air drain footpath is greater than the diameter of described air flue outlet.
As one of preferred version, also be provided with an above sealing strip between described housing lower surface and the base upper surface, described sealing strip is around being arranged at around the described air drain.
As one of preferred version, described outer positioning ring upper end also is provided with at least one storage tank, is provided with at least one spring in the described storage tank, and described spring upper end contacts with described inner walls, and when described outer positioning ring was positioned at the second operating position, described spring presented compressive state at least.
As one of preferred version, described inner walls is provided with a mounting groove, and described spring top places in the described mounting groove, and the bottom places in the described storage tank.
As one of preferred version, described ball installing hole has the tapered cross-section, and its inner aperture is less than the diameter of ball, and the aperture, outer end is more than or equal to the diameter of ball.
As one of preferred version, described outer positioning ring inwall is provided with the groove of the arc line shaped section that cooperates with described ball and regional area that can accommodating described ball, one side inwall of described groove is ramp structure, and this ramp structure is connected with an end of arc line shaped section.
The present invention includes a base, be fixedly mounted on above catch mechanism and a pneumatic mechanism on the base.Arranging of a plurality of catch mechanism can guarantee in the non-stop-machine situation of machine the workpiece that will process to be clamped and dismantles.
Preferably, base is provided with a housing, and catch mechanism comprises interior locating ring and outer positioning ring, and interior locating ring and outer positioning ring all are located in the housing, and interior locating ring, outer positioning ring arrange with housing is concentric.Wherein be provided with ball installing hole for accommodating ball at the ring wall of interior locating ring, it has the tapered cross-section, inner aperture is less than the diameter of ball, and the aperture, outer end realizes like this that more than or equal to the diameter of ball the clamping stagnation ball advances, prevents that it from slipping into the effect in the interior locating ring.Outer positioning ring is sleeved on the interior locating ring, and can come and go vertically mobile between the first operating position on the interior locating ring and the second operating position.When the first operating position, the selection area pushing tow ball on the outer positioning ring, and the setting regions on the ball is stretched in the inner chamber of interior locating ring, reach the purpose of auto lock; When the second operating position, the selection area on the outer positioning ring and ball break away from, and the setting regions on the ball is withdrawed from from the inner chamber of interior locating ring, reach the purpose of separating.
Preferably, base is provided with a housing, be provided with accommodation space between housing and the interior locating ring, and the outer positioning ring bottom is located in the accommodation space at least, and be sealed and matched with inner walls and interior locating ring outer wall respectively, thereby form the air-tight chamber of variable volume in accommodation space, air-tight chamber is communicated with air ducting system in the pneumatic mechanism.
Preferably, be provided with storage tank in the outer positioning ring upper end, inner walls is provided with mounting groove, be provided with spring in the storage tank, the top of spring places in the mounting groove and contacts with inner walls, and the bottom places in the storage tank, when outer positioning ring was positioned at the second operating position, spring presented compressive state.
Preferably, also be provided with the groove of the arc line shaped section that cooperates with ball and regional area that can accommodating ball on the inwall of outer positioning ring, a side inwall of groove is ramp structure, and this ramp structure is connected with an end of arc line shaped section.
Preferably, pneumatic mechanism is used for driving outer positioning ring, has comprised the air ducting system of being located in the base, and air ducting system is communicated with extraneous source of the gas.Air ducting system comprises the air drain that is distributed in the base upper surface and the air flue that is distributed in the base, wherein air drain is located in the air-tight chamber, its shape is employing and the ring cylinder of outer positioning ring and the concentric setting of interior locating ring, and its ring footpath so just can guarantee to drive more uniformly outer positioning ring by the gases at high pressure that air flue enters in the air drain greater than the diameter of air flue outlet.Simultaneously, also be provided with an above sealing strip between housing lower surface and base upper surface, sealing strip is around being arranged at around the air drain, to reach the bubble-tight effect that guarantees.
The present invention carries out when work in the following manner:
When electrode being put into a catch mechanism, electrode enters into the inner chamber of interior locating ring, in ball radially laterally motion because of the extruding that is subject to electrode of interior locating ring; Simultaneously, outer positioning ring is by self gravitation and the effect of spring-compressed elastic force and move downward, the partial groove of accommodating ball and curved line section are also thereupon downward on outer positioning ring, the extruding ball is inwardly motion radially, ball installing hole in this moment on the locating ring is because its internal diameter less than the diameter of ball, can play the effect of chucking ball.Like this, ball is subject to rightabout two power diametrically, and the result of these two power effects makes ball clamping stagnation, fixed electrode, reaches the motionless purpose of tight lock electrode.When needs are dismantled electrode, connect the air inlet air inlet by source of the gas.Gas enters in the air flue, enlarges the lifting surface area of outer positioning ring by air drain, utilizes the lifting power of gas with the outer positioning ring lifting.Partial groove on the outer positioning ring inwall and arc line shaped section be upwards lifting also, ball obtains larger space in the groove by the inclined-plane of arc line shaped section, towards the direction motion away from ball installing hole on the interior locating ring, eliminate the extruding of electrode accommodating in the internal locating ring inner chamber, make things convenient for electrode to take out.
For more being conducive to resetting of outer positioning ring, also can spring be set at outer positioning ring, when air inlet made the outer positioning ring lifting in air ducting system, spring was compressed, and when exitting in the air ducting system, the spring complex, and it is descending to promote outer positioning ring.
This has just realized that the clamping that utilizes outer positioning ring gravity and spring force effect automatically to carry out workpiece fixes the purpose of utilizing air pressure to dismantle.The chuck assembly of this self-action is behind clamping workpiece, and processing work can reach 2 precision, has guaranteed the accurate with consistent of all workpiece processing, has also saved man-hour, has improved the machinery utilization rate.
Description of drawings
Below in conjunction with the drawings and specific embodiments, a preferred embodiment of the present invention is described in further detail.
Fig. 1 is the stereogram of a preferred embodiment of the present invention.
Fig. 2 is the perspective view of the catch mechanism of a preferred embodiment of the present invention.
Fig. 3 is the front view of the catch mechanism of a preferred embodiment of the present invention.
Fig. 4 is that the catch mechanism of a preferred embodiment of the present invention is along A-A face cutaway view.
Fig. 5 is the front view of the outer positioning ring of a preferred embodiment of the present invention.
Fig. 6 is that the outer positioning ring of a preferred embodiment of the present invention is along B-B face cutaway view.
Fig. 7 is the front view of the interior locating ring of a preferred embodiment of the present invention.
Description of reference numerals: 1 feature board, 2 bases, 3 air flue fabrication holes, 4 catch mechanism, 5 air flue air inlets, 6 outer positioning rings, 7 interior locating rings, 8 springs, 9 balls, 10 sealing strips, 11 air flues, 12 air drains, 13 arc line shaped sections, 14 storage tanks, 15 grooves, 16 ball installing holes.
The specific embodiment
In order to specify the specific embodiment of the present invention, be specifically described below in conjunction with accompanying drawing 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7.
The present invention includes three parts such as feature board 1, base 2 and catch mechanism 4.Consult shown in the accompanying drawing 1, base 2 is parts of CNC milling machine, is provided with air flue air inlet 5 at the side of base 2, simultaneously, also has the some air flue fabrication holes 5 that arrange for processing air flue 11 specially.Be provided with several identical catch mechanism 4 at feature board 1, can guarantee in the non-stop-machine situation of machine, electrode to be clamped and dismantles.
The present invention includes a base 2, be fixedly mounted on above catch mechanism 4 and a pneumatic mechanism on the base 2.Arranging of a plurality of catch mechanism 4 can guarantee in the non-stop-machine situation of machine the workpiece that will process to be clamped and dismantles.
Preferably, base 2 is provided with a housing, and catch mechanism 4 comprises outer positioning ring 6 and interior locating ring 7, and outer positioning ring 6 and interior locating ring 7 all are located in the housing, and outer positioning ring 6, interior locating ring 7 arrange with housing is concentric.Referring to accompanying drawing 7, wherein be provided with ball installing hole 16 for accommodating ball 9 at the ring wall of interior locating ring 7, it has the tapered cross-section, inner aperture is less than the diameter of ball 9, the aperture, outer end realizes like this that more than or equal to the diameter of ball 9 clamping stagnation ball 9 advances, prevents that it from slipping into the effect in the interior locating ring 7.Referring to accompanying drawing 2, outer positioning ring 6 is sleeved on the interior locating ring 7, and can come and go vertically mobile between the first operating position on the interior locating ring 7 and the second operating position.When the first operating position, the selection area pushing tow ball 9 on the outer positioning ring 7, and the setting regions on the ball 9 is stretched in the inner chamber of interior locating ring 7, reach the purpose of auto lock; When the second operating position, the selection area on the outer positioning ring 6 and ball 9 break away from, and the setting regions on the ball 9 is withdrawed from from the inner chamber of interior locating ring 7, reach the purpose of separating.
Referring to accompanying drawing 4, preferably, base 2 is provided with a housing, be provided with accommodation space between housing and the interior locating ring 7, and outer positioning ring 6 bottoms are located in the accommodation space at least, and be sealed and matched with inner walls and interior locating ring 7 outer walls respectively, thereby in accommodation space, forming the air-tight chamber of variable volume, air-tight chamber is communicated with air ducting system in the pneumatic mechanism.
Referring to accompanying drawing 4, preferably, be provided with storage tank 14 in outer positioning ring 6 upper ends, inner walls is provided with mounting groove, be provided with spring 8 in the storage tank 14, the top of spring 8 places in the mounting groove and contacts with inner walls, and the bottom places in the storage tank 14, when outer positioning ring 6 was positioned at the second operating position, spring 8 presented compressive state.
Referring to accompanying drawing 6, preferably, also be provided with the groove 15 of the arc line shaped section 13 that cooperates with ball 9 and regional area that can accommodating ball 9 on the inwall of outer positioning ring 6, a side inwall of groove 15 is ramp structure, and this ramp structure is connected with an end of arc line shaped section 13.
Referring to attached 1 and Fig. 4, preferred, pneumatic mechanism is used for driving outer positioning ring 6, has comprised the air ducting system of being located in the base 2, and air ducting system is communicated with extraneous source of the gas, also has the special some air flue fabrication holes 5 that arrange for processing air flue 11.Air ducting system comprises the air drain 12 that is distributed in the base upper surface and the air flue 11 that is distributed in the base 2, wherein air drain 12 is located in the air-tight chamber, its shape is the ring cylinder that adopts with outer positioning ring 6 and the 7 concentric settings of interior locating ring, and its ring footpath so just can guarantee to drive more equably outer positioning ring 6 by the gases at high pressure that air flue 11 enters in the air drain 12 greater than the diameter of air flue 11 outlets.Simultaneously, also be provided with an above sealing strip 10 between housing lower surface and base 2 upper surfaces, sealing strip 10 is around being arranged at around the air drain 12, to reach the bubble-tight effect that guarantees.
The present invention carries out when work in the following manner:
When electrode being put into any catch mechanism 4, electrode enters into the inner chamber of interior locating ring 7, and the ball 9 in interior locating ring 7 inboards radially moves to the direction of outer positioning ring 6 because being subject to the extruding of electrode; Simultaneously, the spring 8 that outer positioning ring 6 and upper surface thereof are accommodating moves downward because being subject to Action of Gravity Field, and the groove 15 that is used for accommodating ball 9 regional areas at outer positioning ring 6 is also thereupon downward, and extruding ball 9 is inwardly locating ring 7 interior cavity direction motions radially.Like this, ball 9 is subject to the effect of two power of rightabout, ball 9 enters the ball installing hole 16 on the interior locating ring 7, because the internal diameter of ball installing hole 16 is less than the diameter of ball 9, external diameter is greater than the diameter of ball 9, therefore, ball 9 can not pass through ball installing hole 16 fully, and is subject to the extruding force of ball installing hole 16.The result of these several power effects makes ball 9 clamping stagnations in ball installing hole 16 and fixes electrode, reaches the purpose of tight lock electrode.The number of ball installing hole 16 is identical with the number of ball 9, and each ball installing hole 16 can apply active force to each ball 9.
When needs are dismantled electrode, by 5 air inlets of air flue air inlet.Gas enters in the air flue 11, enlarge the lifting surface area of outer positioning ring 6 by air drain 12, because the ring of air drain 12 footpath thickness is less than the ring footpath thickness of outer positioning ring 6, gases at high pressure lifting power can be acted on the outer positioning ring 6 fully, outer positioning ring 6 and spring 8 utilize the simultaneously lifting of lifting power of gases at high pressure like this.Arc line shaped section 13 and also upwards lifting of groove 15 at outer positioning ring 6 inwalls, ball 9 obtains larger space in the arc line shaped section 13 by the ramp structure of arc line shaped section 13, radially moved to outer positioning ring 6 directions by interior locating ring 7, thereby eliminate the extruding of the accommodating electrode of internal locating ring 7 inner chambers, make things convenient for electrode to take out, that is to say and utilized air pressure dismounting workpiece.
It is pointed out that above-mentioned preferred embodiment only is explanation technical conceive of the present invention and characteristics, its purpose is to allow the personage who is familiar with technique can understand content of the present invention and according to this enforcement, can not limit protection scope of the present invention with this.All equivalences that Spirit Essence is done according to the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (10)
1. a combined pneumatic chuck is characterized in that, it comprises:
One base (2),
Be fixedly mounted on an above catch mechanism on the described base (2), described catch mechanism comprises:
Interior locating ring (7), its ring wall are provided with the ball installing hole (16) for accommodating ball (9);
Outer positioning ring (6), it is sleeved on the described interior locating ring (7), and can be round mobile between the first operating position on the described interior locating ring (7) and the second operating position vertically,
Wherein, when the first operating position, the described ball of selection area pushing tow (9) on the described outer positioning ring (6), and the setting regions on the described ball (9) is stretched in the inner chamber of interior locating ring (7),
And when the second operating position, the selection area on the described outer positioning ring (6) and described ball (9) break away from, and the setting regions on the described ball (9) is withdrawed from from the inner chamber of interior locating ring (7);
And for the pneumatic mechanism that drives outer positioning ring (6), described pneumatic mechanism comprises the air ducting system of being located in the base (2), and described air ducting system is communicated with source of the gas.
2. combined pneumatic chuck according to claim 1, it is characterized in that, described base also is provided with a housing on (2), be provided with accommodation space between described housing and the interior locating ring (7), and described at least outer positioning ring (6) bottom is located in the described accommodation space, and be sealed and matched with described inner walls and interior locating ring (7) outer wall respectively, thereby in described accommodation space, forming the air-tight chamber of variable volume, described air-tight chamber is communicated with described air ducting system.
3. combined pneumatic chuck according to claim 2, it is characterized in that, described air ducting system comprises the air drain (12) that is distributed in base (2) upper surface and is distributed in air flue (11) in the base (2), described air drain (12) is communicated with source of the gas through air flue (11), and described air drain (12) is located in the described air-tight chamber.
4. according to claim 2 or 3 described combined pneumatic chucks, it is characterized in that, described outer positioning ring (6) and interior locating ring (7) all are located in the described housing, and described outer positioning ring (6), interior locating ring (7) arrange with housing is concentric.
5. combined pneumatic chuck according to claim 3, it is characterized in that, described air drain (12) adopts the ring cylinder air drain with described outer positioning ring (6) and the concentric setting of interior locating ring (7), and the ring of described air drain (12) footpath is greater than the diameter of described air flue (11) outlet.
6. according to claim 3 or 5 described combined pneumatic chucks, it is characterized in that, described housing lower surface and base (2) also are provided with an above sealing strip (10) between the upper surface, and described sealing strip (10) is around being arranged at described air drain (12) on every side.
7. according to claim 2 or 3 described combined pneumatic chucks, it is characterized in that, described outer positioning ring (6) upper end also is provided with at least one storage tank (14), be provided with at least one spring (8) in the described storage tank (14), described spring (8) upper end contacts with described inner walls, and at least at described outer positioning ring (6) when being positioned at the second operating position, described spring (8) presents compressive state.
8. according to claim 2 or 3 described combined pneumatic chucks, it is characterized in that, described inner walls is provided with a mounting groove, and described spring (8) top places in the described mounting groove, and the bottom places in the described storage tank (14).
9. according to claim 1 and 2 or 3 described combined pneumatic chucks, it is characterized in that, described ball installing hole (16) has the tapered cross-section, and its inner aperture is less than the diameter of ball (9), and the aperture, outer end is more than or equal to the diameter of ball (9).
10. according to claim 1 and 2 or 3 described combined pneumatic chucks, it is characterized in that, described outer positioning ring (6) inwall is provided with the groove (15) of the arc line shaped section (13) that cooperates with described ball (9) and regional area that can accommodating described ball (9), one side inwall of described groove (15) is ramp structure, and this ramp structure is connected with an end of arc line shaped section (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103870144A CN102862077A (en) | 2012-10-12 | 2012-10-12 | Combined pneumatic chuck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103870144A CN102862077A (en) | 2012-10-12 | 2012-10-12 | Combined pneumatic chuck |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102862077A true CN102862077A (en) | 2013-01-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012103870144A Pending CN102862077A (en) | 2012-10-12 | 2012-10-12 | Combined pneumatic chuck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102862077A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103433774A (en) * | 2013-08-16 | 2013-12-11 | 安徽合力股份有限公司 | Hobbing die capable of locking automatically |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5370378A (en) * | 1993-09-13 | 1994-12-06 | Positrol, Inc. | Work holding system |
| US6170836B1 (en) * | 1997-12-23 | 2001-01-09 | Vischer & Bolli Ag | Clamping device for securing a draw-in nipple to a clamping plate |
| US20030160374A1 (en) * | 2002-02-22 | 2003-08-28 | Kabushiki Kaisha Kosmek | Automatic positioning device |
| EP1452273A1 (en) * | 2003-02-26 | 2004-09-01 | Samchully Machinery Co., Ltd. | A unit for adjusting clamping force for a vice |
| CN2736095Y (en) * | 2004-05-31 | 2005-10-26 | 中国重型汽车集团有限公司 | Steel ball type rising chip positioning device |
| CN201224030Y (en) * | 2008-06-05 | 2009-04-22 | 大连华凯机床有限公司 | Self-centering fixture |
| EP2239089A1 (en) * | 2008-01-28 | 2010-10-13 | Pascal Engineering Corporation | Work pallet positioning and fixing device |
-
2012
- 2012-10-12 CN CN2012103870144A patent/CN102862077A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5370378A (en) * | 1993-09-13 | 1994-12-06 | Positrol, Inc. | Work holding system |
| US6170836B1 (en) * | 1997-12-23 | 2001-01-09 | Vischer & Bolli Ag | Clamping device for securing a draw-in nipple to a clamping plate |
| US20030160374A1 (en) * | 2002-02-22 | 2003-08-28 | Kabushiki Kaisha Kosmek | Automatic positioning device |
| EP1452273A1 (en) * | 2003-02-26 | 2004-09-01 | Samchully Machinery Co., Ltd. | A unit for adjusting clamping force for a vice |
| CN2736095Y (en) * | 2004-05-31 | 2005-10-26 | 中国重型汽车集团有限公司 | Steel ball type rising chip positioning device |
| EP2239089A1 (en) * | 2008-01-28 | 2010-10-13 | Pascal Engineering Corporation | Work pallet positioning and fixing device |
| CN201224030Y (en) * | 2008-06-05 | 2009-04-22 | 大连华凯机床有限公司 | Self-centering fixture |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103433774A (en) * | 2013-08-16 | 2013-12-11 | 安徽合力股份有限公司 | Hobbing die capable of locking automatically |
| CN103433774B (en) * | 2013-08-16 | 2016-12-28 | 安徽合力股份有限公司 | Can the gear hobbing mould of auto lock |
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Application publication date: 20130109 |