CN106141859B - A kind of magnetic shoe precision copying equipment - Google Patents

A kind of magnetic shoe precision copying equipment Download PDF

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Publication number
CN106141859B
CN106141859B CN201510206554.1A CN201510206554A CN106141859B CN 106141859 B CN106141859 B CN 106141859B CN 201510206554 A CN201510206554 A CN 201510206554A CN 106141859 B CN106141859 B CN 106141859B
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magnetic shoe
bistrique
positioning
arc
copying equipment
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CN106141859A (en
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淦青龙
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NINGBO YINZHOU DAXING FEIBIAO EQUIPMENT FACTORY
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NINGBO YINZHOU DAXING FEIBIAO EQUIPMENT FACTORY
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Abstract

The purpose of the present invention is to provide a kind of magnetic shoe precision copying equipment to solve the defect that magnetic shoe machining accuracy is not high, processing method is single by copying.Its technical solution is, it is provided with the positioning device for positioning magnetic shoe, the positioning device includes the positioning surface to match with magnetic shoe exterior arc surface or inner arc surface, it further include copying apparatus, the copying apparatus includes arc track feeler mechanism and bistrique, arc track feeler mechanism drives grinding mechanism to process the magnetic shoe being fixed on positioning surface, and bistrique diameter is less than magnetic shoe outer circle arc dia.The control of logical regulating mechanism and servo feed motor can realize and can control bistrique in the plane and realize the movement of axial movement and radial direction, the two combination can realize the simulation of any track, also it is achieved that the ground face of the needs of magnetic shoe carries out fine processing, realize machining accuracy higher, processing method is flexible, suitable for including the processing of eccentric magnetic shoe and a variety of magnetic shoe opposite sex shapes.

Description

A kind of magnetic shoe precision copying equipment
Technical field
The present invention relates to a kind of magnetic shoe process equipments, more specifically, it relates to a kind of magnetic shoe precision copying equipment.
Background technology
Magnetic shoe be applied to feeding motor on the magnetic tile of tool, by rare earth material die casting and it is ground be made, But magnetic shoe grinding bed processing method currently on the market has very much, but its essence is all forming, that is, is used and processing The grinding wheel that matches of magnetic shoe diameter grinding is carried out to the inside and outside circular arc of magnetic shoe, to improve the precision on magnetic shoe surface, grinding wheel Material usually using skive.
Application No. is 200920142986.0 patent application patents to disclose a kind of Self-acting grinding machine for magnetic shoes, for magnetic shoe Intrados, action plane, extrados, two sides and two end faces grinding, on the lathe bed of grinding machine have support magnetic shoe Mobile horizontal the first slideway and the second slideway, the second slideway are located at the end of the first slideway and normal thereto, are slided from first Feeder, internal and external cambered surface corase grinding device, internal and external cambered surface fine grinding device, side are disposed on the front end in road to the lathe bed of end Face mill apparatus;It is provided with end face mill apparatus on the lathe bed at the second slideway;Only feel lathe bed in the first slideway and the second slideway On be provided with for the magnetic shoe commutation on the first slideway to be delivered to the direction switching device of the second slideway.Although this device is set Be equipped with the corase grinding device and fine grinding device of difference, improve the machining accuracy of magnetic shoe plane, but by this grinding wheel shape into Row grinding has the disadvantage that:
1. machining accuracy is not high, since wear condition cannot control grinding wheel during grinding, with magnetic shoe diameter phase Matched grinding wheel diameter can change, and some magnetic shoes are eccentric magnetic shoe, and grinding wheel difficulty of processing is high, and precision can only control Within ± 0.05mm.
2. processing method is single, grinding wheel is required for needing the surface diameter being ground to be customized according to magnetic shoe, needs to be ground Magnetic shoe profile variation after, grinding wheel is required for being customized again, cannot flexibly carry out the grinding of magnetic shoe.
3. service life is shorter, cost is higher, and since skive is after being used for multiple times, grinding rate declines and can not make With needing the replacement skive that do not stop, inefficiency to cause greatly to waste, constrain the efficient production of magnetic shoe.
Invention content
In view of the deficiencies of the prior art, the present invention intends to provide a kind of magnetic shoe precision copying equipment, By copying, solves the defect that magnetic shoe machining accuracy is not high, processing method is single.
To achieve the above object, the present invention provides following technical solutions:A kind of magnetic shoe precision copying equipment, including Positioning device for positioning magnetic shoe, the positioning device include the positioning to match with magnetic shoe exterior arc surface or inner arc surface Face further includes copying apparatus, and the copying apparatus includes the arc track profiling of bistrique and control bistrique movement Mechanism, the arc track feeler mechanism include the feeding machine of the regulating mechanism and control bistrique movement that are circumferentially rotated with rotary bistrique Structure, the bistrique diameter are less than the outer circle arc dia of magnetic shoe.
Conception according to the present invention, the arc track feeler mechanism includes rotating cylindrical, and the bistrique sliding setting exists In rotating cylindrical, the rotating cylindrical is connected with regulating mechanism and feed mechanism.
Conception according to the present invention, the regulating mechanism include horizontal rack and drive the promotion gas of horizontal rack movement Cylinder is provided with the arc rack being meshed with horizontal rack on the rotating cylindrical.
Conception according to the present invention, the feed mechanism include that feeding motor and lead screw, the lead screw are connected with bistrique, The mounting base of fixed feeding motor is provided on the rotating cylindrical.
Conception according to the present invention, the copying apparatus further include the propulsion for controlling the movement of grinding attachment front-rear direction Mechanism.
Conception according to the present invention, the propulsive mechanism include the eccentric stiffener being connected with arc track feeler mechanism, institute State the sliding rail for being provided on eccentric stiffener and being slid for arc track feeler mechanism.
Conception according to the present invention, the eccentric stiffener include eccentric wheel and linkage piece, and the eccentric wheel passes through linkage piece It is connected with arc track feeler mechanism.
Conception according to the present invention further includes indexing mechanism, and the indexing mechanism has the feeding being connected with positioning device Device and blanking device, the positioning device are circumferentially uniformly distributed along indexing mechanism center.
Conception according to the present invention, the feeding device include loading guide and pusher cylinder, the positioning device both ends It is provided with limiting cylinder.
Conception according to the present invention, the blanking device include the blanking that blanking guide rail and promotion magnetic shoe enter blanking guide rail Cylinder.
Since magnetic shoe process equipment provided by the present invention includes copying apparatus, copying apparatus can be according to magnetic shoe Exterior arc surface or inner arc surface shape drive grinding mechanism finished, grinding wheel directly adds when changing forming Precision not high problem when work magnetic shoe, and used small abrasive nose to be processed the arc track of magnetic shoe to realize machining accuracy Higher, processing method is flexible, suitable for including the processing of eccentric magnetic shoe and a variety of magnetic shoe opposite sex shapes, and need not replace mill Head, it is only necessary to be adapted the positioning surface of positioning device with the inner arc surface of magnetic shoe or exterior arc surface.
Description of the drawings
Fig. 1 is a kind of schematic diagram of magnetic shoe precision copying apparatus embodiments of the present invention;
Fig. 2 is a kind of copying apparatus schematic diagram of magnetic shoe precision copying equipment of the present invention;
Fig. 3 is a kind of copying apparatus another kind schematic diagram of magnetic shoe precision copying equipment of the present invention;
Fig. 4 is a kind of magnetic shoe precision copying equipment feeding device schematic diagram of the present invention;
Fig. 5 is a kind of magnetic shoe precision copying equipment blanking device schematic diagram of the present invention;
Fig. 6 is a kind of magnetic shoe precision copying equipment positioning device schematic diagram of the present invention.
Reference sign:1, indexing mechanism;11, feeding station;12, roughing station;13, station is finished;14, under Expect station;2, copying apparatus;21, arc track feeler mechanism;211, regulating mechanism;212, rotating cylindrical;213, circular arc Rack;214, horizontal rack;215, ball bearing;216, pusher cylinder;22, eccentric stiffener;221, eccentric wheel;222, sliding rail; 223, linkage piece;23, feed mechanism;231, mounting base;24, servo feed motor;241, lead screw;25, bistrique;3, positioning dress It sets;31, positioning surface;32, vacuum suction aperture;4, feeding device;41, the first limiting cylinder;42, the first limited block;43, second Limiting cylinder;44, the second limited block;45, pusher cylinder;46, loading guide;5, blanking device;51, blanking cylinder;52, third Limited block.
Specific implementation mode
With reference to attached drawing 1 to 6, the present invention will be further described.
Referring to Fig.1, it is a kind of structural schematic diagram of magnetic shoe precision copying equipment of present pre-ferred embodiments, such as Shown in figure, indexing mechanism 1 is four station indexing mechanisms 1, is provided with positioning device 3 everywhere on indexing mechanism 1, everywhere positioning device 3 are uniformly arranged along indexing mechanism 1 is axial, wherein positioning device 3 is feeding station 11 at one, feeding device 4 is connected, with it The positioning device 3 of clockwise adjacent is followed successively by roughing station 12, finishing station 13 and discharge station 14, roughing station 12 There are one copying apparatus 2 to carry out to the magnetic shoe processing in positioning device 3, discharge station 14 with finishing station 13 correspondence It is connect with blanking device 5.
With reference to Fig. 6, it is provided with positioning table in positioning device 3, positioning surface 31, positioning surface 31 and needs are provided on positioning table The exterior arc surface or inner arc surface of the magnetic shoe of processing match, and can carry out determining for positioning surface 31 according to the model difference of magnetic shoe System, can more save cost relative to the customization of skive in this way, vacuum suction aperture 32 is provided on positioning surface 31, when Vacuum suction aperture 32 realizes magnetic shoe to the suction of magnetic shoe and is fixed on positioning surface when magnetic shoe is positioned over 31 upper end of positioning surface On 31 without departing from, can be realized using vacuum absorption device can not only process magnetic shoe, also can the non-magnetic materials such as processing ceramic, use Range is more extensive.
With reference to Fig. 4, feeding device further includes pusher cylinder 45, and the magnetic shoe on loading guide 46 is pushed into positioning surface 31, positioning device 3 is additionally provided with limiting cylinder at two, and the first limiting cylinder 41 close to feeding device 4 is arranged in indexing mechanism 1 Planar side, for the first limited block 42 by stretching out from the bottom up, the second limiting cylinder 43 of the other side is provided with the second limit Block 44, when magnetic shoe enters positioning surface 31, since positioning surface 31 is adapted with the arc surface of magnetic shoe, so the both sides of magnetic shoe It can be limited by positioning surface 31, but have deviation on front-rear direction, so the first limited block of the first limiting cylinder 41 is under It stretches out, the second limited block 44 of the second limiting cylinder 43 stretches out, and is all limited to the both ends of magnetic shoe, realizes consolidating on position It is fixed, while the height of the first limited block 42 is not higher than the height of magnetic shoe machined surface, the feasibility of magnetic shoe processing is realized, first When first limited block 42 of limiting cylinder 41 does not extend out, the height of the first limited block 42 and 46 phase of loading guide of feeding device 4 Together, it can be achieved with magnetic shoe and machined surface reached by loading guide 46.
With reference to Fig. 5, blanking device 5 includes blanking cylinder 51 and blanking guide rail, at the beginning of the third limited block 52 of blanking cylinder 51 Beginning state extends to the other side of the positioning device 3 relative to blanking cylinder 51, when needing blanking, the second limiting cylinder 43 The second limited block 44 shrink, then by third limited block 52 by positioning surface 31 magnetic shoe release, realize blanking.
It is 2 schematic diagram of copying apparatus with reference to Fig. 2,3,
Copying apparatus 2 includes arc track feeler mechanism 21 and bistrique 25, further includes control 25 front-rear direction of bistrique Mobile propulsive mechanism.Propulsive mechanism includes the eccentric stiffener 22 being connected with arc track feeler mechanism 21, on eccentric stiffener 22 It is provided with the sliding rail 222 slid for arc track feeler mechanism 21, eccentric stiffener 22 includes eccentric wheel 221 and linkage piece 223, connection Movable plate 223 is connect with 221 eccentric part of eccentric wheel, and the other end and the arc track feeler mechanism 21 of linkage piece 223 link.Due to even Contact eccentric wheel 221 eccentric part, so can realize that arc track feeler mechanism 21 can be along sliding rail 222 in front-rear direction On movement, realize need be actuated for processing when, arc track feeler mechanism 21 is fed into and processing stations On same vertical plane.Copying apparatus 2 includes arc track feeler mechanism 21 and bistrique 25, and 25 diameter of bistrique is less than outside magnetic shoe Arc diameter.Arc track feeler mechanism 21 includes the regulating mechanism 211 circumferentially rotated with rotary bistrique 25 and the control shifting of bistrique 25 Dynamic feed mechanism 23.The feed mechanism 23 includes feeding motor and lead screw 241, and feeding motor selects servo feed motor 24, lead screw 241 is connected with bistrique 25, and the mounting base 231 of fixed feeding motor is provided on the rotating cylindrical 212, is opened Servo feed motor 24 can be achieved with bistrique 25 on rotating cylindrical 212 along moving radially.
Arc track feeler mechanism 21 includes rotating cylindrical 212, and one section of arc rack 213 is provided on rotating cylindrical 212, Arc rack 213 is also meshed with one section of horizontal rack 214, and horizontal rack 214 is connected with a pusher cylinder 216 on one side, passes through Pusher cylinder 216 can make 214 horizontal movement of horizontal rack, and ball bearing 215 is provided between rotating cylindrical 212 and fixed frame, Thereby realizing rotating cylindrical 212 can rotate a certain angle in circumferential direction, while be offered among rotating cylindrical 212 The through-hole of bistrique 25 is placed, the cross section of through-hole is similar ellipse, and there is a trip, servo feed motor 24 can realize control Movement of the bistrique 25 processed on stroke.By the control of regulating mechanism 211 and servo feed motor 24, can realize in the plane Control bistrique 25 does movement axially and radially, and the two combination can realize the simulation of any track, also be achieved that the need of magnetic shoe The face to be ground carries out fine processing, realizes machining accuracy higher, and processing method is flexible, is suitable for including eccentric magnetic shoe With the processing of a variety of magnetic shoe opposite sex shapes, and bistrique 25 need not be replaced, it is only necessary to by the positioning surface 31 and magnetic of positioning device 3 Watt inner arc surface or exterior arc surface be adapted.And the present invention uses small abrasive nose 25 to realize grinding, difference Grinding wheel is customized according to machined surface in forming, is compared to the grinding wheel processing method of fitting entire surface, does not have to load not only Heart grinding wheel is used for multiple times frequently with changing, nor grinding essence caused by being changed using multiple rear diameter with consideration grinding wheel Degree declines, and compares more previous 0.05mm, can reach precision ± 0.01mm, and bistrique 25 can realize the various need of magnetic shoe shape It asks, it is flexible and convenient to use, reduce production cost.
After carrying out roughing station, indexing mechanism 1, which is rotated by 90 °, will need the workpiece operated to rotate to finishing work Position, roughing there are allowance can be made up by finishing, four on indexing mechanism 1 station is all energy It realizes while operating, and be provided with handling equipment 5 to realize the automatic charging of magnetic shoe, process, blanking, need not be additional Labour realizes efficient production, will greatly promote efficiency and benefit.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications It should be regarded as protection scope of the present invention.

Claims (8)

1. a kind of magnetic shoe precision copying equipment, it is characterized in that:Include the positioning device for positioning magnetic shoe, the positioning dress The positioning surface including matching with magnetic shoe exterior arc surface or inner arc surface is set, further includes copying apparatus, the profiling adds Tooling sets the arc track feeler mechanism including bistrique and control bistrique movement, and the arc track feeler mechanism includes driving The feed mechanism of regulating mechanism and control bistrique movement that bistrique circumferentially rotates, the external arc that the bistrique diameter is less than magnetic shoe are straight Diameter;The arc track feeler mechanism includes rotating cylindrical, and the bistrique sliding is arranged in rotating cylindrical, the rotating cylindrical It is connected with regulating mechanism and feed mechanism;The regulating mechanism includes horizontal rack and drives the promotion gas of horizontal rack movement Cylinder is provided with the arc rack being meshed with horizontal rack on the rotating cylindrical.
2. a kind of magnetic shoe precision copying equipment according to claim 1, it is characterized in that:The feed mechanism include into To motor and lead screw, the lead screw is connected with bistrique, and the mounting base of fixed feeding motor is provided on the rotating cylindrical.
3. a kind of magnetic shoe precision copying equipment according to claim 1, it is characterized in that:The copying apparatus is also Include the propulsive mechanism of control grinding attachment front-rear direction movement.
4. a kind of magnetic shoe precision copying equipment according to claim 3, it is characterized in that:The propulsive mechanism include with Arc track feeler mechanism connected eccentric stiffener is provided with the cunning slid for arc track feeler mechanism on the eccentric stiffener Rail.
5. a kind of magnetic shoe precision copying equipment according to claim 4, it is characterized in that:The eccentric stiffener includes inclined Heart wheel and linkage piece, the eccentric wheel are connected by linkage piece and arc track feeler mechanism.
6. a kind of magnetic shoe precision copying equipment according to claim 1, it is characterized in that:Further include indexing mechanism, institute Stating indexing mechanism has the feeding device and blanking device being connected with positioning device, and the positioning device is along indexing mechanism center Circumferentially it is uniformly distributed.
7. a kind of magnetic shoe precision copying equipment according to claim 6, it is characterized in that:The feeding device includes upper Material guide rail and pusher cylinder, the positioning device are provided at both ends with limiting cylinder.
8. a kind of magnetic shoe precision copying equipment according to claim 6, it is characterized in that:Under the blanking device includes Material guide rail and promotion magnetic shoe enter the blanking cylinder of blanking guide rail.
CN201510206554.1A 2015-04-27 2015-04-27 A kind of magnetic shoe precision copying equipment Active CN106141859B (en)

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Application Number Priority Date Filing Date Title
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CN106141859B true CN106141859B (en) 2018-07-17

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* Cited by examiner, † Cited by third party
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CN114473691B (en) * 2021-12-21 2023-05-12 浙江赛赛轴承有限公司 A unloader that is used for bearing ring to forge hot cutting
CN114211593A (en) * 2021-12-29 2022-03-22 中钢天源(马鞍山)通力磁材有限公司 Method for improving collapse force of permanent magnetic ferrite magnetic shoe
CN116728234B (en) * 2023-08-15 2023-10-10 山东卓益数控设备有限公司 Automatic rotation type grinding equipment

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2468662Y (en) * 2001-04-04 2002-01-02 成都金誉实业开发有限公司 Two side grinding machine for brake head
CN201342608Y (en) * 2009-02-07 2009-11-11 常州市良久机械制造有限公司 Self-acting grinding machine for magnetic shoes
CN202137663U (en) * 2011-06-28 2012-02-08 鞍山市德康磁性材料有限责任公司 Arc-surface grinding device for permanent-magnet ferrite shoe-shaped product
JP2013112554A (en) * 2011-11-28 2013-06-10 Nippon Electric Glass Co Ltd Glass plate polishing apparatus
CN203109761U (en) * 2013-03-11 2013-08-07 南通保来利轴承有限公司 Cambered surface grinding device of permanent magnetic ferrite
CN203282344U (en) * 2012-09-26 2013-11-13 阳东县国浩机械制造有限公司 Cloth wheel grinding opening/closing device of polishing machine
CN204584913U (en) * 2015-04-27 2015-08-26 宁波市鄞州大兴非标设备制造厂 The accurate copying equipment of a kind of magnetic shoe

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2468662Y (en) * 2001-04-04 2002-01-02 成都金誉实业开发有限公司 Two side grinding machine for brake head
CN201342608Y (en) * 2009-02-07 2009-11-11 常州市良久机械制造有限公司 Self-acting grinding machine for magnetic shoes
CN202137663U (en) * 2011-06-28 2012-02-08 鞍山市德康磁性材料有限责任公司 Arc-surface grinding device for permanent-magnet ferrite shoe-shaped product
JP2013112554A (en) * 2011-11-28 2013-06-10 Nippon Electric Glass Co Ltd Glass plate polishing apparatus
CN203282344U (en) * 2012-09-26 2013-11-13 阳东县国浩机械制造有限公司 Cloth wheel grinding opening/closing device of polishing machine
CN203109761U (en) * 2013-03-11 2013-08-07 南通保来利轴承有限公司 Cambered surface grinding device of permanent magnetic ferrite
CN204584913U (en) * 2015-04-27 2015-08-26 宁波市鄞州大兴非标设备制造厂 The accurate copying equipment of a kind of magnetic shoe

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