CN102847969A - Double-end core expansion type mandrel fixture - Google Patents

Double-end core expansion type mandrel fixture Download PDF

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Publication number
CN102847969A
CN102847969A CN2012103433373A CN201210343337A CN102847969A CN 102847969 A CN102847969 A CN 102847969A CN 2012103433373 A CN2012103433373 A CN 2012103433373A CN 201210343337 A CN201210343337 A CN 201210343337A CN 102847969 A CN102847969 A CN 102847969A
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CN
China
Prior art keywords
mandrel
expansion core
axial
core expansion
hole
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Pending
Application number
CN2012103433373A
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Chinese (zh)
Inventor
黄廷波
茆义巍
仲志全
袁小军
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Jiangsu Airship Gear Corp
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Jiangsu Airship Gear Corp
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by Jiangsu Airship Gear Corp filed Critical Jiangsu Airship Gear Corp
Priority to CN2012103433373A priority Critical patent/CN102847969A/en
Publication of CN102847969A publication Critical patent/CN102847969A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a double-end core expansion type mandrel fixture consisting of a mandrel, a core expansion sleeve and a spiral pin. The mandrel is a conical shaft located by central holes on the two ends, and an axial recess is arranged on the conical shaft segment. The core expansion sleeve is shaped like a thin-walled circular pipe, conical holes with large outer parts and small inner parts and matched with the conical shaft segment of the mandrel are respectively arranged on the two ends of the core expansion sleeve, 5-7 aequilate axial grooves radially penetrating through the hole wall are uniformly distributed on the wall of the conical hole in a surrounding manner, the two ends of each axial groove stop at a radial through hole, and the mandrel inserted into the conical holes on the two ends of the core expansion sleeve is axially limited by the spiral shaft and the axial recesses. According to the invention, the mandrel is jacked and pressed by a core clamper to synchronously generate equal radial elastic deformation on the two ends of the core expansion sleeve so as to eliminate the fit clearance with a workpiece. The two ends of the structure are reliably located, the precision is high and the rigidity is good, so that the structure provides a good condition for improving the machining precision, and the structure is especially suitable for such parts processed by an inner hole locating machine as cylindrical gears and shaft sleeves.

Description

Double end expansion core formula dabber clamp
Technical field
The present invention relates to a kind of mandrel class anchor clamps, specifically, the present invention relates to a kind ofly locate mach dabber clamp with the hole.
Background technology
The rotation machine components usually with endoporus as reference for installation, the easy like this design basis effect consistent with positioning datum that reach realizes higher machined precision.Under the routine techniques equipment condition, the part of processing with the location, hole generally uses mandrel class anchor clamps, and the most frequently used mandrel class anchor clamps mainly contain tapering mandrel and expansion core formula mandrel two macrostructure patterns in the technology now.It is convenient that taper core axle construction is simple, making is easy, workpiece is installed.But inner hole of workpiece only cooperates the part with the tapering mandrel, and setoff installation easily occurs workpiece, and the workpiece axiality is relatively poor after the machined, and this type of dabber clamp only is fit to roughing.Expansion core formula mandrel utilizes built-in tapering mandrel to cooperate with ringfeder in clamping process and produces strain elimination fit clearance, to obtain reliable location.But the expansion core formula dabber clamp of prior art is longer because of ringfeder and workpiece length of fit, and quality of fit is affected by positional precision also except being subjected to the workpiece form accuracy affects, and the quality conformance after the workpiece processing is relatively poor.Particularly there is taper error in inner hole of workpiece, and its positioning accuracy does not reach expection.
Summary of the invention
The present invention is mainly for the expansion core formula core shaft structure defective of prior art, propose a kind of simple in structure, positioning accuracy is high, reliable clamping, work-handling are easy to double end expansion core formula dabber clamp.
The present invention is achieved through the following technical solutions technical goal.
Double end expansion core formula dabber clamp, it is comprised of mandrel, expansion core cover, spiral pin.Described mandrel is a kind of axis of cone with two ends centre bore location, and axis of cone section is provided with an axial notch.Its improvements are: described expansion core cover is the thin-wall circular tubulose, its cylindrical and inner hole of workpiece matched in clearance, two ends are respectively equipped with the little taper hole that matches with mandrel axis of cone section of outer imperial palace, uniform 5~7 the wide axial grooves that radially run through hole wall of ring cone-shaped wall, every the axial groove two ends terminate in radial direction through hole, and the mandrel of expansion core cover two ends taper hole plug dress is cooperated with axial notch by spiral pin makes axial limiting.
In the said structure, axial groove quantity uniform on the cone-shaped wall of expansion core cover two ends equates, measure-alike, the axial groove of the relative opposite side of axial groove of a side half body position of staggering arranges, axially groove width 1mm~3mm.
The present invention compared with prior art has following good effect:
1, the axis of cone and taper hole fit structure are simple, make easily;
2, expansion core cover two ends taper hole structural element is identical, and supporting mandrel pressurized makes expansion core cover two ends produce synchronously the radial elastic distortion of equivalent, and the workpiece two ends obtain the equivalent tensioner synchronously, and positioning accuracy is high;
3, expansion core cover two ends obtain the equivalent tensioner synchronously, and the fit clearance of elimination and workpiece improves the rigidity of workpiece on the installation site, avoid generator processing vibration, effectively improve the roughness that workpiece is processed.
Description of drawings
Fig. 1 is structural profile schematic diagram of the present invention.
Fig. 2 is expansion core nested structure generalized section among Fig. 1.
Fig. 3 is core shaft structure schematic diagram among Fig. 1.
The specific embodiment
The below with reference to the accompanying drawings and in conjunction with the embodiments, the invention will be further described.
Double end expansion core formula dabber clamp shown in Figure 1, it is comprised of mandrel 1, expansion core cover 2, spiral pin 3.Described mandrel 1 is a kind of axis of cone with two ends centre bore 1.2 location, and axis of cone section is provided with an axial notch 1.1.Described expansion core cover 2 is the main bodys among the present invention, be the thin-wall circular tubulose, its cylindrical and workpiece 4 endoporus matched in clearance, two ends are respectively equipped with the little taper hole that matches with mandrel 1 axis of cone section of outer imperial palace, uniform 5~7 the wide axial grooves 2.1 that radially run through hole wall of ring cone-shaped wall, every axial groove 2.1 two ends terminate in radial direction through hole 2.2, and the mandrel 1 that expansion core is overlapped 2 two ends taper hole plugs dress is cooperated with axial notch 1.1 by spiral pin 3 makes axial limiting.The present embodiment is used for roll flute processing, and the workpiece 4 that is sleeved on the expansion core cover 2 is straight spur gears, this outside diameter of gear φ 50mm, φ 28mm in the endoporus.Little because of workpiece 4 endoporus and excircle dimension, expansion core is overlapped on the 2 both sides cone-shaped walls respectively uniform 5 roads mutually the stagger axial groove 2.1 of half body position, the i.e. axial groove 2.1 alternate 72 of the same side 0, the axial groove 2.1 relative opposite sides of opposite side stagger 36 0Do 72 0Alternately, every axial groove 2.1 width unification is 1.5mm.During practical application, expansion core is overlapped 2 built-in mandrels 1 and is in loose shape, first expansion core cover 2 is placed in workpiece 4 endoporus, the centre bore 1.2 of mandrel 1 is lived on rear startup grinding machine hydraulic top in place pinnacle, the mandrel 1 relative expanding core retainer plate 2 of pressurized moves in doing axially, produce synchronously equivalent radial elastic distortion so that expansion core is overlapped 2 two ends, eliminate fit clearance with workpiece 4 with this.Workpiece 4 endoporus two ends obtain radially swelling and locating of equivalent synchronously, and this location, structure two ends is reliable, precision is high, good rigidly, have created a good condition for improving precision of grinding teeth and crudy.Use precision of grinding teeth of the present invention and roughness all to improve one more than the grade than prior art, and crudy is stable.

Claims (3)

1. double end expansion core formula dabber clamp, it is comprised of mandrel (1), expansion core cover (2), spiral pin (3); Described mandrel (1) is a kind of axis of cone with two ends centre bore (1.2) location, and axis of cone section is provided with an axial notch (1.1); It is characterized in that: described expansion core cover (2) is the thin-wall circular tubulose, its cylindrical and workpiece (4) endoporus matched in clearance, two ends are respectively equipped with the little taper hole that matches with mandrel (1) axis of cone section of outer imperial palace, uniform 5~7 the wide axial grooves (2.1) that radially run through hole wall of ring cone-shaped wall, every axial groove (2.1) two ends terminate in radial direction through hole (2.2), and the mandrel (1) of expansion core cover (2) two ends taper hole plug dress is cooperated with axial notch (1.1) by spiral pin (3) makes axial limiting.
2. double end expansion core formula dabber clamp according to claim 1, it is characterized in that: on the cone-shaped wall of described expansion core cover (2) two ends uniform axial groove (2.1) quantity equate, measure-alike, the axial groove of a side (2.1) arranges the axial groove (2.1) of the opposite side half body position of staggering relatively.
3. double end expansion core formula dabber clamp according to claim 1 is characterized in that: uniform axial groove width 1mm on described expansion core cover (2) cone-shaped wall~3mm.
CN2012103433373A 2012-09-17 2012-09-17 Double-end core expansion type mandrel fixture Pending CN102847969A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012103433373A CN102847969A (en) 2012-09-17 2012-09-17 Double-end core expansion type mandrel fixture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012103433373A CN102847969A (en) 2012-09-17 2012-09-17 Double-end core expansion type mandrel fixture

Publications (1)

Publication Number Publication Date
CN102847969A true CN102847969A (en) 2013-01-02

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CN2012103433373A Pending CN102847969A (en) 2012-09-17 2012-09-17 Double-end core expansion type mandrel fixture

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104708048A (en) * 2013-12-12 2015-06-17 铜陵市永生机电制造有限责任公司 Expansion core fastening device for turning outer circles of large pipes
CN106041150A (en) * 2016-07-20 2016-10-26 江苏腾旋科技股份有限公司 Outward expansion mandrel with multiple support parts
CN106767348A (en) * 2016-12-21 2017-05-31 上海第机床厂有限公司 Locking cap centring means and spotting device
CN106975762A (en) * 2017-04-21 2017-07-25 芜湖映日科技有限公司 The swelling device of target biscuit processing
CN107803685A (en) * 2017-12-01 2018-03-16 沈阳中之杰流体控制系统有限公司 Cylinder barrel Special Fixture for Machining
CN108481192A (en) * 2018-03-09 2018-09-04 宝鸡石油机械有限责任公司 A kind of mill fixture and clamping method suitable for the long spacer of thin-walled
CN109434147A (en) * 2018-12-29 2019-03-08 广东星联精密机械有限公司 A kind of thin-wall circular tube clamp for machining

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU463517A1 (en) * 1973-04-17 1975-03-15 Каунасский Станкостроительный Завод Им. Ф.Э. Дзержинского Mandrel
EP1145790B1 (en) * 2000-03-13 2005-09-07 Sandvik Tobler S.A. High precision expanding mandrel with cylindrical clamping
CN201376103Y (en) * 2009-01-16 2010-01-06 江苏曙光石油钻采设备有限公司 Expansion core clamp for turning and clamping super-long and large workpieces
CN201744685U (en) * 2010-05-11 2011-02-16 上海东方泵业(集团)有限公司 Built-up mandrel for lathe
CN202174431U (en) * 2011-07-22 2012-03-28 天津建筑机械厂 Excircle turning tool for pin sleeve by means of profiling
CN202741777U (en) * 2012-09-17 2013-02-20 江苏飞船股份有限公司 Double-headed core expansion type spindle clamp

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU463517A1 (en) * 1973-04-17 1975-03-15 Каунасский Станкостроительный Завод Им. Ф.Э. Дзержинского Mandrel
EP1145790B1 (en) * 2000-03-13 2005-09-07 Sandvik Tobler S.A. High precision expanding mandrel with cylindrical clamping
CN201376103Y (en) * 2009-01-16 2010-01-06 江苏曙光石油钻采设备有限公司 Expansion core clamp for turning and clamping super-long and large workpieces
CN201744685U (en) * 2010-05-11 2011-02-16 上海东方泵业(集团)有限公司 Built-up mandrel for lathe
CN202174431U (en) * 2011-07-22 2012-03-28 天津建筑机械厂 Excircle turning tool for pin sleeve by means of profiling
CN202741777U (en) * 2012-09-17 2013-02-20 江苏飞船股份有限公司 Double-headed core expansion type spindle clamp

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104708048A (en) * 2013-12-12 2015-06-17 铜陵市永生机电制造有限责任公司 Expansion core fastening device for turning outer circles of large pipes
CN106041150A (en) * 2016-07-20 2016-10-26 江苏腾旋科技股份有限公司 Outward expansion mandrel with multiple support parts
CN106767348A (en) * 2016-12-21 2017-05-31 上海第机床厂有限公司 Locking cap centring means and spotting device
CN106767348B (en) * 2016-12-21 2024-01-23 上海第一机床厂有限公司 Locking cap centering device and centering method
CN106975762A (en) * 2017-04-21 2017-07-25 芜湖映日科技有限公司 The swelling device of target biscuit processing
CN107803685A (en) * 2017-12-01 2018-03-16 沈阳中之杰流体控制系统有限公司 Cylinder barrel Special Fixture for Machining
CN108481192A (en) * 2018-03-09 2018-09-04 宝鸡石油机械有限责任公司 A kind of mill fixture and clamping method suitable for the long spacer of thin-walled
CN109434147A (en) * 2018-12-29 2019-03-08 广东星联精密机械有限公司 A kind of thin-wall circular tube clamp for machining

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Application publication date: 20130102