CN103878397A - High-speed high-precision mechanical main shaft - Google Patents

High-speed high-precision mechanical main shaft Download PDF

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Publication number
CN103878397A
CN103878397A CN201410134528.8A CN201410134528A CN103878397A CN 103878397 A CN103878397 A CN 103878397A CN 201410134528 A CN201410134528 A CN 201410134528A CN 103878397 A CN103878397 A CN 103878397A
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CN
China
Prior art keywords
main shaft
mandrel
bearing
cutter
precision mechanical
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
Application number
CN201410134528.8A
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Chinese (zh)
Inventor
张峰
张�荣
徐龙
王景玉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHANGHAI KEMAITE PRECISE MACHINE TOOL CO Ltd
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SHANGHAI KEMAITE PRECISE MACHINE TOOL CO Ltd
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 SHANGHAI KEMAITE PRECISE MACHINE TOOL CO Ltd filed Critical SHANGHAI KEMAITE PRECISE MACHINE TOOL CO Ltd
Priority to CN201410134528.8A priority Critical patent/CN103878397A/en
Publication of CN103878397A publication Critical patent/CN103878397A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/70—Stationary or movable members for carrying working-spindles for attachment of tools or work

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sliding-Contact Bearings (AREA)

Abstract

The invention discloses a high-speed high-precision mechanical main shaft which comprises a mandrel, a disc spring, a sleeve and a bearing. A pull rod is arranged in the mandrel, the first end of themandrel pull rod is used for being connected with a tool, and the second end of the pull rod is connected with a tool unfastening mechanism. The disc spring is arranged outside the pull rod in a compressed state. The sleeve is arranged outside the mandrel in a sleeved mode. The bearing is fixed between the mandrel and the sleeve through a pre-tightening mechanism. The sleeve is a shell body outside the main shaft, and is a basic part of the whole main shaft. The bearing is an ultrahigh-speed precise ceramic ball angle contact bearing, and is a core part of the main shaft. The mandrel is a central rotor part of the main shaft. The disc spring provides power for the whole main shaft for clamping the tool, and the functions of clamping and loosening the tool are achieved. The pre-tightening mechanism provides proper pre-tightening force for the bearing, and the rigidity of the bearing is guaranteed. Therefore, the high rotating speed and the high precision of the main shaft are guaranteed, meanwhile, the noise of the main shaft is lowered, and the rotation of the main shaft is more stable.

Description

High-speed high-precision mechanical type main shaft
Technical field
The present invention relates to field of machining, refer in particular to a kind of high-speed high-precision mechanical type main shaft.
Background technology
Mechanical main shaft (for electric main shaft, hereinafter to be referred as main shaft) is that lathe is realized the executive item that cutting rotatablely moves, and is the vitals on lathe; Be the formation campaign that completes surface of the work with cutter, transmit motion and power; Main shaft or the supporting member of cutter, the weight of bearing cutting force, centripetal force, driving force and cutter etc., and ensure that cutter and other relative sections of lathe are by accurate relative position; Ensure that its revolution axle center line position is accurate, stable, to reach machining accuracy and the surface roughness of expection.
In recent years, flourish along with domestic equipment manufacture, the machine industry of manufacturing machine tool as equipment, in order to adapt to the high-speed high-precision process requirements of various different industries, has been greatly developed a collection of main shaft for high-speed high-precision type lathe.
The kinematic accuracy of main shaft and the rigidity of structure are the key factors that determines crudy and stock-removing efficiency.Present domestic brill milling class machining center high speed and precision mechanical main shaft rotating speed also rests on 12000 and turns, and far-end is beated in the level of 0.008mm, and this cannot meet the high speed of the industries such as electronics, 3C, communication, efficient, high-accuracy process requirements.
Summary of the invention
In view of the problems referred to above, the object of the present invention is to provide the mechanical type main shaft of a kind of ultrahigh rotating speed, high accuracy, low noise, meet the demand of market to high-speed high-precision processing.
For this reason, the invention provides a kind of high-speed high-precision mechanical type main shaft, comprising:
Mandrel, is provided with a pull bar in described mandrel, the first end of described pull bar is used for connecting cutter, and the second end of described pull bar connects a cutter-removing mechanism;
Dish spring, described dish spring is sheathed on described pull bar outside with compressive state;
Sleeve, is sheathed on described mandrel outside;
Bearing, described bearing is fixed between described mandrel and described sleeve by pre-tightening mechanism.
High-speed high-precision mechanical type main shaft of the present invention, described sleeve is main shaft external shell, is the foundation of whole main shaft; Described bearing is ultra-speed precise Ceramic Balls angular contact bearing, is the core part of main shaft; Described mandrel is the center rotor part of main shaft; Described dish spring provides power for whole main spindle clamp tool, and realizes folder cutter, loose cutter function; Pre-tightening mechanism provides suitable pretension dynamics for bearing, guarantees main shaft rigidity.Therefore the present invention, ensureing high rotating speed, the high-precision while of main shaft, has reduced the noise of main shaft and has made the rotation of main shaft more steady.
The further improvement of high-speed high-precision mechanical type main shaft of the present invention is, the first end of described mandrel is formed with a taper hole, and described taper hole is used for installing described cutter.
The further improvement of high-speed high-precision mechanical type main shaft of the present invention is, described pull bar is formed with a blind hole near the end of the first end of described taper hole, on described blind hole surrounding wall, be evenly laid with multiple steel balls, the handle of a knife end of described cutter is clamped in described multiple steel balls inner side by a blind rivet, so by described Cutting tool installation manner on described mandrel.
The further improvement of high-speed high-precision mechanical type main shaft of the present invention is, the second end of described mandrel is provided with a locking device, described locking device comprises the first sealing ring and the second sealing ring, described mandrel outside is provided with described the first sealing ring in the junction of described cutter-removing mechanism, described pull bar inside is provided with described the second sealing ring in the junction of described cutter-removing mechanism.Described the first sealing ring and the second sealing ring have ensured the sealing of main shaft internal core parts, have also ensured the dynamic balance of main shaft in the process of running up simultaneously.
The further improvement of high-speed high-precision mechanical type main shaft of the present invention is, the first end of described pull bar is formed with a circle tongue along outer rim, and the first end of described dish spring is resisted against described tongue, and the second end of described dish spring is resisted against described the second sealing ring.
The further improvement of high-speed high-precision mechanical type main shaft of the present invention is, bearing described in being provided with two groups between described mandrel and described sleeve, described pre-tightening mechanism comprises and is arranged at the bearing spacer between described two groups of bearings and is resisted against the preloading spring between described two groups of bearings.The built-in die springs of described pre-tightening mechanism is distributed in mandrel outside, has ensured that main shaft main shaft bearing in the process of running up remains enough pretightning forces, has further improved rigidity and the machining accuracy of main shaft.
The further improvement of high-speed high-precision mechanical type main shaft of the present invention is, between the two ends of described sleeve and described mandrel, is provided with hermetically-sealed construction, has prevented the leakage of bearing grease and the intrusion of extraneous greasy dirt, for protection bearing, increasing the service life provides safeguard.
Described pull bar, dish spring, locking device and the folder cutter steel column of high-speed high-precision mechanical type main shaft of the present invention are combined the tool-broaching mechanism that forms mechanical main shaft, have ensured that main shaft has enough broach forces in the time grabbing cutter, guarantee cutter reliable operation.
Brief description of the drawings
Fig. 1 is the structural representation of high-speed high-precision mechanical type main shaft of the present invention.
Fig. 2 is the enlarged diagram of the pull bar first end of high-speed high-precision mechanical type main shaft of the present invention.
Fig. 3 is the enlarged diagram of pull bar second end of high-speed high-precision mechanical type main shaft of the present invention.
Fig. 4 is the sleeve of high-speed high-precision mechanical type main shaft of the present invention and the enlarged diagram of mandrel junction.
Fig. 5 is the schematic diagram of the tool-broaching mechanism of high-speed high-precision mechanical type main shaft of the present invention.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Coordinate referring to shown in Fig. 1, high-speed high-precision mechanical type main shaft 1 of the present invention, comprising:
Mandrel 10, the middle part of described mandrel 10 is formed with an accommodation space, is provided with a pull bar 20 in described accommodation space, and the first end of described mandrel 10 is formed with a taper hole 110, and described taper hole 110 is for the handle of a knife of mounting cutter.Shown in Fig. 2, described pull bar 20 is formed with a circle tongue 210 near the first end of the taper hole 110 of described mandrel 10 along outer rim, described pull bar 20 is formed with a blind hole 220 near the end of the first end of the taper hole 110 of described mandrel 10, on the surrounding wall of described blind hole 220, be evenly laid with the quantity of steel ball 240 described in multiple steel ball 240(and be preferably three), the handle of a knife end of described cutter is clamped in described multiple steel ball 240 inner sides by a blind rivet 230, so by Cutting tool installation manner on described mandrel 10.In addition, high-speed high-precision mechanical type main shaft of the present invention, in the time of structural design, taken into full account at a high speed, the performance requirement of high-accuracy processing, design two-way blowing function at the handle of a knife conical surface and handle of a knife blind rivet place, ensure that main shaft remains taper hole Air blowing cleaning in exchanging knives process, guarantee handle of a knife and the taper hole conical surface are fitted completely, have avoided the tool changing position error in ultraprecise process.
Coordinate referring to shown in Fig. 3, the second end of described mandrel 10 is provided with a locking device 30, between this locking device 30 and described mandrel 10, be provided with the first sealing ring 310, the second end of described pull bar 20 is connected with a cutter-removing mechanism 340 by a connecting rod 330, in embodiment as described in Figure, described cutter-removing mechanism 340 is a shaft coupling.Cutter-removing mechanism 340 is responsible for doing High Rotation Speed under the drive of spindle motor power source.The second end of described pull bar 20 is further provided with the second sealing ring 320 in these cutter-removing mechanism 340 places, described the first sealing ring 310 and the second sealing ring 320 have ensured the sealing of main shaft internal core parts, have also ensured the dynamic balance of main shaft in the process of running up simultaneously.
Dish spring 70, is sheathed on described pull bar 20 outsides, as the actuating unit of folder cutter, loose cutter.Shown in Fig. 1～Fig. 3, the first end 710 of described dish spring 70 is resisted against the tongue 210 of described pull bar 20, and the second end 720 of described dish spring 70 is resisted against described the second sealing ring 320.Due to the different metal kernel blank of processing, need to use difform cutter, so tool-holder on the base of tool, press from both sides exactly cutter.Need to use different cutters instead, need first original cutter to be unloaded, unload and just need loose cutter.
Sleeve 40, coordinates referring to shown in Fig. 4, and described mandrel 10 is installed in described sleeve 40, between the two ends of described sleeve 40 and described mandrel 10, is provided with hermetically-sealed construction 410;
Bearing 50; between described mandrel 10 and described sleeve 40, be provided with two groups of bearings; every group comprises two bearings 50; the inner ring of bearing 50 coordinates with mandrel 10; the outer ring of bearing 50 coordinates with sleeve 40; described hermetically-sealed construction 410 has prevented the leakage of bearing grease and the intrusion of extraneous greasy dirt, for protection bearing, increasing the service life provides guarantee.Between described two groups of bearings, be provided with pre-tightening mechanism 510, this pre-tightening mechanism 510 comprises bearing spacer and is resisted against the preloading spring between bearing.The built-in die springs of pre-tightening mechanism 510 is distributed in mandrel 10 outsides, has ensured that main shaft main shaft bearing in the process of running up remains enough pretightning forces, has further improved rigidity and the machining accuracy of main shaft.
Referring to shown in Fig. 4, high-speed high-precision mechanical type main shaft of the present invention has also designed the sealing means 60 of air curtain sealing and labyrinth seal again, has ensured processing stability and the reliability of main shaft in high speed, high-precision process.
Coordinate referring to shown in Fig. 5, described pull bar 20, dish spring 70, locking device 30 and the steel ball 240 of high-speed high-precision mechanical type main shaft of the present invention combined the tool-broaching mechanism that forms mechanical main shaft, ensure that main shaft has enough broach forces in the time grabbing cutter, guaranteed cutter reliable operation.
High-speed high-precision mechanical type main shaft of the present invention, described sleeve is main shaft external shell, is the foundation of whole main shaft; Described bearing is ultra-speed precise Ceramic Balls angular contact bearing, is the core part of main shaft; Described mandrel is the center rotor part of main shaft; Described dish spring provides power for whole main spindle clamp tool, and realizes folder cutter, loose cutter function; Hermetically-sealed construction is for protection bearing, increasing the service life provides safeguard; Pre-tightening mechanism provides suitable pretension dynamics for bearing, guarantees main shaft rigidity.
High-speed high-precision mechanical type main shaft of the present invention, whole assembling process is all carried out in constant temperature, toilet, and key components and parts has adopted the strict operation such as measurement and on-the-spot facing-up in the time of assembling.Dish spring material adopts the special spring steel of high-quality to make, the combination of dish spring and elastic force have passed through strict analog computation, increase sealing device at dish spring pull bar and main shaft mandrel mating surface, prevent in the gap between extraneous greasy dirt intrusion dish spring and dish spring, tool-broaching mechanism has adopted steel ball rebounding type structure, realize the stability of main spindle broach, ensured the high-precision requirement of tool sharpening, also ensured the reliability of main shaft tool changing simultaneously.
The above is only preferred embodiment of the present invention, not the present invention is done to any pro forma restriction, although the present invention discloses as above with preferred embodiment, but not in order to limit the present invention, any those skilled in the art, not departing from the scope of technical solution of the present invention, when can utilizing the technology contents of above-mentioned announcement to make a little change or being modified to the equivalent embodiment of equivalent variations, in every case be the content that does not depart from technical solution of the present invention, any simple modification of above embodiment being done according to technical spirit of the present invention, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.

Claims (7)

1. a high-speed high-precision mechanical type main shaft, is characterized in that comprising:
Mandrel, is provided with a pull bar in described mandrel, the first end of described pull bar is used for connecting cutter, and the second end of described pull bar connects a cutter-removing mechanism;
Dish spring, described dish spring is sheathed on described pull bar outside with compressive state;
Sleeve, is sheathed on described mandrel outside;
Bearing, described bearing is fixed between described mandrel and described sleeve by pre-tightening mechanism.
2. high-speed high-precision mechanical type main shaft as claimed in claim 1, is characterized in that the first end of described mandrel is formed with a taper hole, and described taper hole is used for installing described cutter.
3. high-speed high-precision mechanical type main shaft as claimed in claim 2, it is characterized in that described pull bar is formed with a blind hole near the end of the first end of described taper hole, on described blind hole surrounding wall, be evenly laid with multiple steel balls, the handle of a knife end of described cutter is clamped in described multiple steel balls inner side by a blind rivet, so by described Cutting tool installation manner on described mandrel.
4. high-speed high-precision mechanical type main shaft as claimed in claim 1, the second end that it is characterized in that described mandrel is provided with a locking device, described locking device comprises the first sealing ring and the second sealing ring, described mandrel outside is provided with described the first sealing ring in the junction of described cutter-removing mechanism, described pull bar inside is provided with described the second sealing ring in the junction of described cutter-removing mechanism.
5. high-speed high-precision mechanical type main shaft as claimed in claim 4, is characterized in that the first end of described pull bar is formed with a circle tongue along outer rim, and the first end of described dish spring is resisted against described tongue, and the second end of described dish spring is resisted against described the second sealing ring.
6. high-speed high-precision mechanical type main shaft as claimed in claim 1, bearing described in it is characterized in that being provided with two groups between described mandrel and described sleeve, described pre-tightening mechanism comprises and is arranged at the bearing spacer between described two groups of bearings and is resisted against the preloading spring between described two groups of bearings.
7. the high-speed high-precision mechanical type main shaft as described in any one in claim 1 to 6, is characterized in that being provided with hermetically-sealed construction between the two ends of described sleeve and described mandrel.
CN201410134528.8A 2014-04-03 2014-04-03 High-speed high-precision mechanical main shaft Pending CN103878397A (en)

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Application Number Priority Date Filing Date Title
CN201410134528.8A CN103878397A (en) 2014-04-03 2014-04-03 High-speed high-precision mechanical main shaft

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105965516A (en) * 2016-06-08 2016-09-28 武汉理工大学 Floating rapid-change type manipulator applicable to deburring
CN106112020A (en) * 2016-08-22 2016-11-16 张民胜 A kind of main shaft of numerical control machine tool
CN107414567A (en) * 2017-08-07 2017-12-01 江苏思维福特机械科技股份有限公司 A kind of machining center high-precision main shaft
CN107617974A (en) * 2017-09-26 2018-01-23 高勇 A kind of sander
CN109759607A (en) * 2018-12-25 2019-05-17 陕西科技大学 Transmission main shaft
CN117415343A (en) * 2023-12-06 2024-01-19 无锡阳光精机股份有限公司 Built-in main shaft of motor

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Publication number Priority date Publication date Assignee Title
JPH02284802A (en) * 1989-04-27 1990-11-22 Mitsubishi Heavy Ind Ltd Machine tool
JPH05138408A (en) * 1991-11-13 1993-06-01 Hitachi Seiko Ltd High speed main shaft device
CN1947904A (en) * 2006-11-02 2007-04-18 沈阳建筑大学 Hot-isostatic pressure silicon nitride all-ceramic electric main shaft and its mfg. method
CN201124239Y (en) * 2007-11-28 2008-10-01 山东博特精工股份有限公司 Electric spindle with detachable rotor
TW201000232A (en) * 2008-06-27 2010-01-01 Femto Technology Co Ltd Main shaft device capable of improving transient equilibrium
CN101697435A (en) * 2009-10-28 2010-04-21 沈阳建筑大学 High-speed electric main shaft for mixed use of outer ring of steel bearing and inner ring of ceramic bearing
CN201482990U (en) * 2009-07-06 2010-05-26 厦门精合电气自动化有限公司 Constant pressure pre-tightening device of high-speed main shaft bearing
CN201902463U (en) * 2010-12-29 2011-07-20 广州市昊志机电有限公司 Bearing pedestal assembly for ball high-speed main shaft
CN201988726U (en) * 2011-03-28 2011-09-28 广州市昊志机电有限公司 Bearing pre-tightening structure of high-speed electric main shaft
CN102794469A (en) * 2012-08-31 2012-11-28 绍兴文理学院 High-precision high-speed motor spindle
CN102825268A (en) * 2012-09-17 2012-12-19 长沙金岭机床有限责任公司 Transmission main shaft structure of numerical control drilling and milling machine
CN102962480A (en) * 2012-11-06 2013-03-13 广州市昊志机电股份有限公司 Belt spindle of machine tool
CN203170984U (en) * 2012-12-28 2013-09-04 大连瓦特重机床有限公司 Main shaft component of digital controlled lathe
CN103658691A (en) * 2013-11-20 2014-03-26 广州市昊志机电股份有限公司 High-speed electric spindle of ball

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02284802A (en) * 1989-04-27 1990-11-22 Mitsubishi Heavy Ind Ltd Machine tool
JPH05138408A (en) * 1991-11-13 1993-06-01 Hitachi Seiko Ltd High speed main shaft device
CN1947904A (en) * 2006-11-02 2007-04-18 沈阳建筑大学 Hot-isostatic pressure silicon nitride all-ceramic electric main shaft and its mfg. method
CN201124239Y (en) * 2007-11-28 2008-10-01 山东博特精工股份有限公司 Electric spindle with detachable rotor
TW201000232A (en) * 2008-06-27 2010-01-01 Femto Technology Co Ltd Main shaft device capable of improving transient equilibrium
CN201482990U (en) * 2009-07-06 2010-05-26 厦门精合电气自动化有限公司 Constant pressure pre-tightening device of high-speed main shaft bearing
CN101697435A (en) * 2009-10-28 2010-04-21 沈阳建筑大学 High-speed electric main shaft for mixed use of outer ring of steel bearing and inner ring of ceramic bearing
CN201902463U (en) * 2010-12-29 2011-07-20 广州市昊志机电有限公司 Bearing pedestal assembly for ball high-speed main shaft
CN201988726U (en) * 2011-03-28 2011-09-28 广州市昊志机电有限公司 Bearing pre-tightening structure of high-speed electric main shaft
CN102794469A (en) * 2012-08-31 2012-11-28 绍兴文理学院 High-precision high-speed motor spindle
CN102825268A (en) * 2012-09-17 2012-12-19 长沙金岭机床有限责任公司 Transmission main shaft structure of numerical control drilling and milling machine
CN102962480A (en) * 2012-11-06 2013-03-13 广州市昊志机电股份有限公司 Belt spindle of machine tool
CN203170984U (en) * 2012-12-28 2013-09-04 大连瓦特重机床有限公司 Main shaft component of digital controlled lathe
CN103658691A (en) * 2013-11-20 2014-03-26 广州市昊志机电股份有限公司 High-speed electric spindle of ball

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105965516A (en) * 2016-06-08 2016-09-28 武汉理工大学 Floating rapid-change type manipulator applicable to deburring
CN105965516B (en) * 2016-06-08 2018-10-09 武汉理工大学 Floating quick-changing type end-effector suitable for deburring
CN106112020A (en) * 2016-08-22 2016-11-16 张民胜 A kind of main shaft of numerical control machine tool
CN106112020B (en) * 2016-08-22 2018-11-27 南陵旺科知识产权运营有限公司 A kind of main shaft of numerical control machine tool
CN107414567A (en) * 2017-08-07 2017-12-01 江苏思维福特机械科技股份有限公司 A kind of machining center high-precision main shaft
CN107617974A (en) * 2017-09-26 2018-01-23 高勇 A kind of sander
CN107617974B (en) * 2017-09-26 2023-12-08 深圳市富信泰科技有限公司 Polisher
CN109759607A (en) * 2018-12-25 2019-05-17 陕西科技大学 Transmission main shaft
CN117415343A (en) * 2023-12-06 2024-01-19 无锡阳光精机股份有限公司 Built-in main shaft of motor
CN117415343B (en) * 2023-12-06 2024-04-26 无锡阳光精机股份有限公司 Built-in main shaft of motor

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Application publication date: 20140625