CN104117696B - A kind of knife bar tailstock with tapered sleeve clamping - Google Patents

A kind of knife bar tailstock with tapered sleeve clamping Download PDF

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Publication number
CN104117696B
CN104117696B CN201410339083.7A CN201410339083A CN104117696B CN 104117696 B CN104117696 B CN 104117696B CN 201410339083 A CN201410339083 A CN 201410339083A CN 104117696 B CN104117696 B CN 104117696B
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China
Prior art keywords
tapered sleeve
knife bar
tailstock
bearing
hole
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CN201410339083.7A
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Chinese (zh)
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CN104117696A (en
Inventor
刘大猷
树军
钱海
张海清
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Ningbo Xia Tuo Intelligent Technology Co., Ltd.
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Ningbo Xiatuo Machinery Equipment Co ltd
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Publication of CN104117696A publication Critical patent/CN104117696A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, 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
    • B23Q1/00Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/72Auxiliary arrangements; Interconnections between auxiliary tables and movable machine elements
    • B23Q1/76Steadies; Rests

Abstract

The invention provides a kind of knife bar tailstock with tapered sleeve clamping, tailstock adopts the two accurate elastic conical drogues of installing in opposite directions and a pair of Biserial cylindrical roller bearing precision-fit with internal taper hole to be clamped in and on knife bar, is assembled into rotary body, after the integral structure tailstock that this type of knife bar runs through is in place, rigidity and precision while having ensured knife bar work, the installation and removal of tapered sleeve, tailstock are convenient and swift, be applicable to grow roll, the tail end supporting of milling rotation class cutter.

Description

A kind of knife bar tailstock with tapered sleeve clamping
Technical field
The present invention relates to the knife bar tailstock of the accurate elastic conical drogue clamping of a kind of use, particularly a kind of forInstall long roll, the knife bar tailstock of milling class rotary cutting tool.
Background technology
Rolling, in some stock-removing machines of milling processing, hobboing cutter, milling cutter are installed on knife bar and carry outRotary cutting processing, the front end of knife bar is connected with machine tool spindle, obtains cutting required power and biographyPass precision and the rigidity of cutting movement. If cutter is shorter, this of knife bar kind of cantilever beam mode is installed,Its kinematic accuracy and rigidity generally can meet processing job requirements, if but cutter is longer, and anti-in cuttingUnder the effect of power, the kinematic accuracy of knife bar tailstock and rigidity are geometric progression compared with front end and decline, obviously notCan meet the requirement of processing operation. At this moment, just need to add a supporting tailstock at knife bar tail end, make knife barBecome simply supported beam mounting means. Cutter, in process, need often take off and carry out sharpening, and tailstock mustMust remove, therefore general tailstock and knife bar are made split-type structural, i.e. the rotating shaft of knife bar tail end and knife restConnect with taper seat or face of cylinder form, make it to be easy to separate, although such tailstock is to knife barTail end has played certain supporting role and handling are simple, but due to split-type structural, the precision of its connectionStill not enough with rigidity. When cutter is longer, larger, the required precision of resistance to cutting is when higher, this pointBody formula knife bar tailstock just can not satisfy the demands.
Summary of the invention
(1) technical problem that will solve
The technical problem to be solved in the present invention is to overcome deficiency of the prior art, provides a kind of with accurateElastic conical drogue and the knife bar tailstock that coordinates clamping with internal taper hole precision bearing, make knife bar front end, tail end baseThe precision such as this realization, etc. rigidity, meet that cutter is longer, resistance to cutting is larger, required precision is when higherRoll, milling processing request.
(2) technical scheme
For solving the problems of the technologies described above, the invention provides a kind of knife bar tailstock with tapered sleeve clamping, compriseFor the tailstock body 2 of knife bar tail end supporting and the knife bar 5 of cutter 14 is installed, described tailstock body 2On offer tailstock body installing hole, wherein, endoporus be installed be taper hole in described tailstock body installing holeClutch shaft bearing 91 and the second bearing 92, and the cone of described clutch shaft bearing 91 and described the second bearing 92The small-bore end in hole is installed in opposite directions, and the two ends of described tailstock body installing hole are fixed with respectively described firstBearing 91 carries out the rear end cap 3 of axial location and described the second bearing 92 is carried out to axial locationDrive end bearing bracket 17, is arranged with the first tapered sleeve 4 in described clutch shaft bearing 91, described the second bearing 92 inner sleevesBe provided with the second tapered sleeve 12, described knife bar 5 passes described the second tapered sleeve 12 and described the first tapered sleeve 4 successively,On described knife bar 15, be formed with the shaft shoulder, the end contact of the described shaft shoulder and described the second tapered sleeve 12, instituteThe tail end of stating knife bar 15 locking nut 6 that has been threaded, described locking nut 6 and described the first tapered sleeve4 end contact.
Further, the inner face of described rear end cap 3 offers first step hole, described first stepThe diameter in hole is greater than the external diameter of the inner ring of described clutch shaft bearing 91.
Further, the inner face of described drive end bearing bracket 17 offers second step hole 10, and described secondThe diameter of stepped hole is greater than the external diameter of the inner ring of described the second bearing 92.
Further, the degree of depth in described first step hole and/or described second step hole is more than or equal to0.5mm and be less than or equal to 1mm.
Further, the end of described the first tapered sleeve 4 extends radially outwardly and forms stopper section 18, described inThe end contact of locking nut 6 and described stopper section 18.
Further, on described knife bar 5, threaded engagement has end face seal nut 11, described end face sealBetween the contact-making surface of nut 11 and described drive end bearing bracket 17, be provided with sealing ring 16.
Further, the end face of described drive end bearing bracket 17 offers annular groove, and described sealing ring 16 is pacifiedBe contained in described annular groove.
Further, described the first tapered sleeve sidewall is provided with the first hole 20-1, and described the first hole is by theOne groove 19-1 is connected to the smaller diameter end end face of described the first tapered sleeve, or connects by the second groove 19-2To the larger diameter end end face of described the first tapered sleeve, described the first groove and described the second groove are circumferentially arranged alternatelyAt the jacket wall of described the first tapered sleeve.
Further, described the second tapered sleeve sidewall is provided with the second hole 20-2, and described the second hole is by theThree-flute 19-3 is connected to the smaller diameter end end face of described the second tapered sleeve, or connects by the 4th groove 19-4To the larger diameter end end face of described the second tapered sleeve, described three-flute and described the 4th groove are circumferentially arranged alternatelyAt the jacket wall of described the second tapered sleeve.
Further, described clutch shaft bearing and described the second bearing are Biserial cylindrical roller bearing.
(3) beneficial effect
The knife bar tailstock of tapered sleeve clamping for the present invention, adopts integral structure, and knife bar and bearing inner race are adoptedRealize gapless clamping with accurate elastic conical drogue, the precision of knife bar and rigidity all promote greatly; Tail spindleHold the biserial cylinder precise roller bearing adopting with internal taper hole, there is high rigidity, high accuracy, high rotating speedAdvantage, regulate tapered sleeve pretightning force can trace regulate bearing clearance, reach better service precision andLife-span. Tailstock bearing is free end structure, the requirement of expanding with heat and contract with cold while meeting knife bar work completely.
Brief description of the drawings
Fig. 1 is the cross-sectional view of the knife bar tailstock of the present invention's tapered sleeve clamping;
Fig. 2 is the front view of the first tapered sleeve of the knife bar tailstock of the present invention's tapered sleeve clamping;
Fig. 3 is the left schematic diagram of the first tapered sleeve of the knife bar tailstock of the present invention's tapered sleeve clamping;
Fig. 4 is the front view of the second tapered sleeve of the knife bar tailstock of the present invention's tapered sleeve clamping;
Fig. 5 is the left view of the second tapered sleeve of the knife bar tailstock of the present invention's tapered sleeve clamping.
Detailed description of the invention
Consult Fig. 1~Fig. 5, the invention provides a kind of knife bar tailstock with tapered sleeve clamping, comprise for cutterThe tailstock body 2 of bar tail end supporting and the knife bar 5 of cutter 14 is installed offers on tailstock body 2Tailstock body installing hole, wherein, it is the clutch shaft bearing 91 of taper hole that endoporus is installed in tailstock body installing holeWith the second bearing 92, and the small-bore end of the taper hole of this clutch shaft bearing 91 and the second bearing 92 is pacified in opposite directionsDress, is fixed with respectively the rear end of clutch shaft bearing 91 being carried out to axial location at the two ends of tailstock body installing holeLid 3 and the second bearing 92 is carried out to the drive end bearing bracket 17 of axial location, interior sheathed at clutch shaft bearing 91There is the first tapered sleeve 4, in the second bearing 92, be arranged with the second tapered sleeve 12, (the first tapered sleeve and the second coneBetween the opposite face of cover, have gap), knife bar 5 passes the second tapered sleeve 12 and the first tapered sleeve 4 successively,On knife bar 15, be formed with the shaft shoulder, the end contact of this shaft shoulder and the second tapered sleeve 12, at knife bar 15The tail end locking nut 6 that has been threaded, the end contact of this locking nut 6 and the first tapered sleeve 4; ForBearing inner race is moved axially within the specific limits, to meet the effect of expanding with heat and contract with cold of knife bar, rearThe inner face of end cap 3 offers first step hole, and the diameter in this first step hole is greater than clutch shaft bearing 91The external diameter of inner ring, offer second step hole 10 at the inner face of drive end bearing bracket 17 simultaneously, this is second years oldThe diameter of stepped hole is greater than the external diameter of the inner ring of the second bearing 92; Preferred first step hole and/or theThe degree of depth of two stepped holes is more than or equal to 0.5mm and is less than or equal to 1mm; For the ease of installing and determiningPosition, in the present embodiment, the end of the first tapered sleeve 4 extends radially outwardly and forms stopper section 18, locking screwThe end contact of mother 6 and stopper section 18; In order to improve assembly precision, in locking nut 6 and stopper sectionBetween 18, be provided with packing ring 7; In order to improve sealing property, avoid dust, steam etc. to enter, at knife barOn 5, threaded engagement has end face seal nut 11, and this end face seal nut 11 contacts with drive end bearing bracket 17Between face, be provided with sealing ring 16; In the present embodiment, offer annular groove at the end face of drive end bearing bracket 17,Sealing ring 16 is arranged in this annular groove; In order to make axle sleeve homogeneous deformation, establish at the first tapered sleeve sidewallBe equipped with the first hole 20-1, this first hole is connected to the smaller diameter end end of the first tapered sleeve by the first groove 19-1Face, or be connected to the larger diameter end end face of the first tapered sleeve and the first groove and second by the second groove 19-2Groove is circumferentially arranged alternately the jacket wall at the first tapered sleeve; In like manner, be provided with the second hole at the second tapered sleeve sidewall20-2, this second hole is connected to the smaller diameter end end face of the second tapered sleeve by three-flute 19-3, or passes throughThe 4th groove 19-4 is connected to the larger diameter end end face of the second tapered sleeve, and this three-flute and the 4th groove are circumferentially handed overFor the jacket wall that is arranged on the second tapered sleeve; In order to improve running accuracy and rigidity, first in the present embodimentBearing and the second bearing all adopt Biserial cylindrical roller bearing.
Below the present invention is elaborated by the installation steps of the knife bar tailstock of tapered sleeve clamping;
First, the small-bore end of a pair of Biserial cylindrical roller bearing internal taper hole is arranged on to tailstock body in opposite directionsIn 2 tailstock body installing hole, then with drive end bearing bracket and rear end cap by screw 8 by axial the outer ring of bearingSpacing fixing, being processed with respectively the degree of depth at the inner face of drive end bearing bracket and rear end cap is 0.5mm to 1mmStepped hole, to allow bearing inner race to move axially within the scope of this. In the annular groove of drive end bearing bracketEmbedding has sealing ring 16, and now, tailstock body has been assembled. When work, first cutter 14 is installedOn knife bar 5, with accurate lock-nut 15 by seal washer 13 by cutter locking, end face is closeEnvelope nut 11 screws on knife bar screw thread, and being inserted in inwall at knife bar front end is that face of cylinder outer wall is taper seatThe second tapered sleeve 12, axial limiting, on the knife bar shaft shoulder, is processed with the staggered hole of decile on the second tapered sleeveAnd groove, then by pushing away forward for tailstock body is inserted in knife bar of assembling, at this moment, in front end the second bearingThe internal conical surface of circle contacts and promotes with the outer conical surface of the second tapered sleeve and moves to rear end after clutch shaft bearing inner ringIn the female parts stepped hole being somebody's turn to do; On knife bar, be inserted in again the first tapered sleeve 4 and packing ring 7 with stopper section,On the first tapered sleeve, be also processed with the staggered hole of decile and groove, the first tapered sleeve 4 promotes the second bearing inner raceMove axially forward, rely on the precision-fit of brearing bore and tapered sleeve size completely to clamp and make in bearingCircle mediates, and forms the distance that moves axially of front and back 0.5mm to 1mm, to adapt to cutterThe effect of expanding with heat and contract with cold when bar work. Adjust the gap of end face seal nut and sealing ring, form rationallyEnd face seal, last, tailstock is fixed on the matrix 1 with main spindle box one, rely on processing peaceDress precision makes tailstock body endoporus and main shaft coaxial, and both ends of the surface are vertical with main-shaft axis. When needs sharpening orChange when cutter, first screw off locking nut 6, take off packing ring 7, with specific purpose tool by with stopper sectionThe first tapered sleeve exits, and tailstock body and installation matrix are departed from after fixed relationship, strikes in right amount coda pedestal,The second bearing inner race and the second tapered sleeve are departed from, take off tailstock body, and press the inverse number order general of mounting cutterCutter takes off.
The knife bar tailstock of tapered sleeve clamping for the present invention, adopts integral structure, and knife bar and bearing inner race are adoptedRealize gapless clamping with accurate elastic conical drogue, the precision of knife bar and rigidity all promote greatly; Tail spindleHold the biserial cylinder precise roller bearing adopting with internal taper hole, there is high rigidity, high accuracy, high rotating speedAdvantage, regulate tapered sleeve pretightning force can trace regulate bearing clearance, reach better service precision andLife-span. Tailstock bearing is free end structure, the requirement of expanding with heat and contract with cold while meeting knife bar work completely.
The above is only the preferred embodiment of the present invention, it should be pointed out that for the artThose of ordinary skill, not departing under the prerequisite of the technology of the present invention principle, can also make someImprovements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (10)

1. the knife bar tailstock with tapered sleeve clamping, comprise the tailstock body (2) for the supporting of knife bar tail end, and the knife bar (5) of cutter (14) is installed, described tailstock body offers tailstock body installing hole on (2), it is characterized in that: the clutch shaft bearing that endoporus is taper hole (91) and the second bearing (92) are installed in described tailstock body installing hole, and the small-bore end of the taper hole of described clutch shaft bearing (91) and described the second bearing (92) is installed in opposite directions, the two ends of described tailstock body installing hole are fixed with respectively the rear end cap (3) that described clutch shaft bearing (91) is carried out to axial location, and described the second bearing (92) is carried out to the drive end bearing bracket (17) of axial location, in described clutch shaft bearing (91), be arranged with the first tapered sleeve (4), in described the second bearing (92), be arranged with the second tapered sleeve (12), described knife bar (5) is successively through described the second tapered sleeve (12) and described the first tapered sleeve (4), described knife bar is formed with the shaft shoulder on (5), the end contact of the described shaft shoulder and described the second tapered sleeve (12), the tail end of described knife bar (5) locking nut (6) that has been threaded, the end contact of described locking nut (6) and described the first tapered sleeve (4).
2. the knife bar tailstock with tapered sleeve clamping as claimed in claim 1, it is characterized in that: the inner face of described rear end cap (3) offers first step hole, the diameter in described first step hole is greater than the external diameter of the inner ring of described clutch shaft bearing (91).
3. the knife bar tailstock with tapered sleeve clamping as claimed in claim 2, it is characterized in that: the inner face of described drive end bearing bracket (17) offers second step hole (10), the diameter in described second step hole is greater than the external diameter of the inner ring of described the second bearing (92).
4. the knife bar tailstock with tapered sleeve clamping as claimed in claim 3, is characterized in that: the degree of depth in described first step hole and/or described second step hole is more than or equal to 0.5mm and is less than or equal to 1mm.
5. the knife bar tailstock with tapered sleeve clamping as claimed in claim 1, it is characterized in that: the end of described the first tapered sleeve (4) extends radially outwardly and forms stopper section (18), the end contact of described locking nut (6) and described stopper section (18).
6. the knife bar tailstock with tapered sleeve clamping as claimed in claim 1, it is characterized in that: the upper threaded engagement of described knife bar (5) has end face seal nut (11), between described end face seal nut (11) and the contact-making surface of described drive end bearing bracket (17), is provided with sealing ring (16).
7. the knife bar tailstock with tapered sleeve clamping as claimed in claim 6, is characterized in that: the end face of described drive end bearing bracket (17) offers annular groove, and described sealing ring (16) is arranged in described annular groove.
8. the knife bar tailstock with tapered sleeve clamping as claimed in claim 1, it is characterized in that: described the first tapered sleeve sidewall is provided with the first hole (20-1), described the first hole is connected to the smaller diameter end end face of described the first tapered sleeve by the first groove (19-1), or being connected to the larger diameter end end face of described the first tapered sleeve by the second groove (19-2), described the first groove and described the second groove are circumferentially arranged alternately the jacket wall at described the first tapered sleeve.
9. the knife bar tailstock with tapered sleeve clamping as claimed in claim 1, it is characterized in that: described the second tapered sleeve sidewall is provided with the second hole (20-2), described the second hole is connected to the smaller diameter end end face of described the second tapered sleeve by three-flute (19-3), or being connected to the larger diameter end end face of described the second tapered sleeve by the 4th groove (19-4), described three-flute and described the 4th groove are circumferentially arranged alternately the jacket wall at described the second tapered sleeve.
10. the knife bar tailstock with tapered sleeve clamping as described in claim 1 to 9 any one, is characterized in that: described clutch shaft bearing and described the second bearing are Biserial cylindrical roller bearing.
CN201410339083.7A 2014-07-16 2014-07-16 A kind of knife bar tailstock with tapered sleeve clamping Active CN104117696B (en)

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CN104117696B true CN104117696B (en) 2016-05-18

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110434359A (en) * 2019-08-13 2019-11-12 南京工程学院 A kind of taper shank bearing tailstock

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1171711A (en) * 1967-01-17 1969-11-26 Dean Smith & Grace Ltd Improvements in or relating to a Lathe Tailstock Spindle Assembly
DD278520A1 (en) * 1988-12-23 1990-05-09 Grossdrehmaschbau 8 Mai Veb REITSTOCKPINOLE FOR INSERTING INTO A WORK SPINDLE
CN2125470U (en) * 1992-06-20 1992-12-23 张玉良 Live centre with changeable centre head
CN101898252A (en) * 2010-07-12 2010-12-01 河南宇建矿业技术有限公司 Internal hole-positioning centre frame and novel lathe
CN201702379U (en) * 2010-07-12 2011-01-12 河南宇建矿业技术有限公司 Bore positioning centre rest and novel lathe
CN202952079U (en) * 2012-12-13 2013-05-29 福建兵工装备有限公司 Clamp for machining thickness excircle surface of spherical shell
CN203917966U (en) * 2014-07-16 2014-11-05 宁波夏拓机械装备有限公司 A kind of knife bar tailstock with tapered sleeve clamping

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1171711A (en) * 1967-01-17 1969-11-26 Dean Smith & Grace Ltd Improvements in or relating to a Lathe Tailstock Spindle Assembly
DD278520A1 (en) * 1988-12-23 1990-05-09 Grossdrehmaschbau 8 Mai Veb REITSTOCKPINOLE FOR INSERTING INTO A WORK SPINDLE
CN2125470U (en) * 1992-06-20 1992-12-23 张玉良 Live centre with changeable centre head
CN101898252A (en) * 2010-07-12 2010-12-01 河南宇建矿业技术有限公司 Internal hole-positioning centre frame and novel lathe
CN201702379U (en) * 2010-07-12 2011-01-12 河南宇建矿业技术有限公司 Bore positioning centre rest and novel lathe
CN202952079U (en) * 2012-12-13 2013-05-29 福建兵工装备有限公司 Clamp for machining thickness excircle surface of spherical shell
CN203917966U (en) * 2014-07-16 2014-11-05 宁波夏拓机械装备有限公司 A kind of knife bar tailstock with tapered sleeve clamping

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Address after: 315202 Tian Gu industrial zone, Jiulong Town, Zhenhai District, Ningbo, Zhejiang

Patentee after: Ningbo Xia Tuo Intelligent Technology Co., Ltd.

Address before: 315202 389 Jung Road, camel street, Zhenhai District, Ningbo, Zhejiang

Patentee before: NINGBO XIATUO MACHINERY EQUIPMENT CO., LTD.