WO2017102558A1 - Dispositif de serrage de pièces - Google Patents

Dispositif de serrage de pièces Download PDF

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Publication number
WO2017102558A1
WO2017102558A1 PCT/EP2016/080321 EP2016080321W WO2017102558A1 WO 2017102558 A1 WO2017102558 A1 WO 2017102558A1 EP 2016080321 W EP2016080321 W EP 2016080321W WO 2017102558 A1 WO2017102558 A1 WO 2017102558A1
Authority
WO
WIPO (PCT)
Prior art keywords
clamping element
balls
clamping
ball cage
workpiece
Prior art date
Application number
PCT/EP2016/080321
Other languages
German (de)
English (en)
Inventor
Horst Knäbel
Original Assignee
Horst Knäbel
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.)
Filing date
Publication date
Application filed by Horst Knäbel filed Critical Horst Knäbel
Publication of WO2017102558A1 publication Critical patent/WO2017102558A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/40—Expansion mandrels
    • B23B31/4006—Gripping the work or tool by a split sleeve
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
    • B23B31/20—Longitudinally-split sleeves, e.g. collet chucks
    • B23B31/201—Characterized by features relating primarily to remote control of the gripping means
    • B23B31/2012—Threaded cam actuator
    • B23B31/20125—Axially fixed cam, moving jaws

Definitions

  • the invention relates to a device for excitingly receiving a workpiece to be machined and / or measured concentrically rotating about the rotation axis of a machine, comprising a clamping element having a conical annular surface, a support element having an identically conical surface and a two parts in the axial direction to each other displacing clamping member, wherein the clamping element has at least one slot extending in the axial direction.
  • mandrels which consist of a support member and a workpiece receiving clamping element.
  • the support element has a conical surface and the clamping element is provided with an identical, conical surface.
  • the clamping element has at least one slot extending in the axial direction.
  • the support member may be formed either like a spine or a sleeve, so that workpieces can be stretched either from the inside or from the outside.
  • the axial displacement of the clamping element on or in the support element has a very high sliding friction, which leads to a high wear of these elements and thus to a further impairment of concentricity and on the other, especially at a small cone angle, to overcome the Stiction when relaxing the workpiece requires very complex measures.
  • the present invention is therefore based on the object to improve the known clamping device to the effect that in a simple, inexpensive and inventive device, the concentricity of the clamping element largely retained and independent of the clamping range and the clamping force or is reproducible and the frictional forces are greatly reduced, also to minimize wear, and thus to create a highly accurate, practical clamping device with a much longer life.
  • the clamping element on the conical surface of the clamping element in the same way conical and stocked with a plurality of balls of the same diameter Ball cage bears and the clamping element is connected via the balls with the cone having the same surface of the support member frictionally.
  • the balls are arranged in axial rows.
  • the clamping element can be present on both sides of the rows of balls to form flexurally elastic transitions between the rows of balls supporting webs recesses.
  • the distributed over the outer and / or inner diameter recesses may be formed equal to each other and at the same distance from the opposite surface of the clamping element.
  • This configuration of the device ensures that the clamping element on the rows of balls similar to the support element supported, even at small cone angles, almost frictionless and exactly concentric on the support member and easily move away from him again, that the wear, the running accuracy and the life of a high-quality linear ball guide corresponds, and that can be sealed by the design and arrangement of the ball cage, the slot of the clamping element in a meaningful way.
  • the clamping element has two slits extending in the axial direction, which can be offset by 180 ° in the circumferential direction.
  • the clamping element can thus consist of two identically designed clamping element shells, which can be connected to each other, for example, via separate clamping elements.
  • each clamping element shell in each clamping element shell an anti-rotation lock can preferably be introduced relative to the supporting element.
  • a corresponding recess for the rotation is preferably in a plane of symmetry of the clamping element shell.
  • FIG. 2 shows a longitudinal section running parallel to the axis but offset by 90 ° through the clamping device according to FIG. 1,
  • FIG. 3 shows a cross section through the tensioning device according to FIG. 1 in the middle region of the tensioning element, FIG.
  • FIG. 4 shows a perspective illustration of a longitudinally slotted ball cage
  • FIG. 5 shows a longitudinal section through a further clamping device for receiving workpieces with a bore according to the invention
  • Figure 6 shows a cross section through the clamping device according to Figure 5 in the central region of the clamping element.
  • the clamping device 1 shown in Figures 1 and 2 of the drawing consists of a trained as a mandrel support member 5, which has a conical outer surface 5a.
  • the cone has a cone angle of 1 ° to 12 °, preferably 6 ° (inclination angle 3 °), on.
  • the thicker end of the support member 5 is made in the illustrated embodiment in one piece with a flange formed as a connecting part 9, via which the support member 5 can be flanged to a correspondingly formed part, for example, the spindle of a lathe.
  • connection part 9 for example, four radial threaded holes 9 a are incorporated, which can accommodate 10 known per se screws.
  • the connecting part 9 and thus the pin-like support member 5 are aligned exactly to the axis of rotation of the machine.
  • ring spring-like ball cage 7 On the conical surface 5a of the support member 5 is provided with a slot 7b, ring spring-like ball cage 7 according to the figure 4 attached, which has a conical, a truncated cone corresponding shape with a cone angle of preferably 6 °.
  • the ball cage 7 may consist of a metallic material as well as of suitable plastic, for example Teflon.
  • a plurality of openings 7c are provided, which are arranged distributed in a plurality of circumferential rows over the entire surface of the ball cage 7 mirror images aligned with each other and each receive a ball 6 made of hardened steel, carbide or ceramic.
  • These preferably designed as precision balls balls 6 have, for example, a diameter of 1, 0 to 4.0 mm and are usefully used with grease in the openings 7c of the ball cage 7.
  • the number of openings 7c and thus the number of balls 6 is always dependent on the clamping diameter of the clamping device 1 and is in the illustrated embodiment at about 120th
  • the distance between the individual openings 7c and the balls 6 should be as small as possible in order to distribute the clamping force evenly over as large a number of balls 6 as possible and thus to be able to keep the surface pressure low despite high clamping force.
  • the formed as a slotted annular spring-like sleeve ball cage 7 is dimensioned so that it applies with a corresponding bias to the conical surface 4a of a provided with a slot 4b clamping element 4 and the slot 4b covering it.
  • no openings 7c or balls 6 are provided to a diametrical arrangement of the slots 4b, 7b of Clamping element 4 and the ball cage 7 to ensure a sufficiently large coverage of the slot 4b of the clamping element 4 and so as to achieve one of the bias and the nature, in particular the roughness, both surfaces 4a, 7a corresponding radial seal.
  • FIG. 1 illustrates the diametrical arrangement of the slots 4b, 7b of the clamping element 4 and the ball cage 7
  • Fig. 2 shows the axial arrangement of the rows of balls 6a and two axial stops 12 for a male, here not shown workpiece.
  • Figures 1 and 2 also show that the clamping element 4 and the ball cage 7 advantageously have the same length and can be pushed together by the trained as a screw 3a with a disk clamping member 3 axially on the conically increasing outer diameter of the support member 5.
  • a rubber-elastic spring ring 11 for example Vulkollan, which is supported on the one hand on an end face of the connecting part 9 and on the other hand on the end faces of the clamping element 4 and the ball cage 7 and so the axial seal in this area takes over.
  • the clamping element 4 has, as Figure 3 shows, parallel to the rows of balls 6a extending recesses 4c, so that on both sides of the rows of balls 6a bending elastic transitions 4d arise, which ensure that the clamping element 4 on the remaining webs 4e and the rows of balls 6a similar link chain is supported on the support member 5 and so exactly concentric to the rotation axis 2 expand or compress and the clamping force is distributed evenly on all balls 6.
  • FIG. 5 shows another embodiment according to the invention in longitudinal section.
  • the support element 5 essentially corresponds to the support element 5 in FIG. 1.
  • the support element 5 is provided with a threaded section 8, equipped with a keyway 5b and drilled through more.
  • the connecting part 9 also substantially corresponds to the connecting part 9 in the form of a flange in FIG. 1. However, it can also be designed as a mandrel with a steep taper shank, Morse taper shank or the like.
  • Between the threaded portion 8 and the clamping element 4 is an intermediate disc 14 for relaxing a workpiece, not shown here.
  • the delivery of the threaded ring 13 for clamping and relaxing the workpiece can be done manually as well as by machine.
  • the outer circumferential surface of the threaded ring 13 may be provided with grooves, bores, a toothing, a friction lining or formed as a friction surface.
  • the sealing elements 16 arranged on both sides of the threaded ring 13 are designed such that they can compensate for the offset in the axial and tangential direction resulting during clamping and unclamping of the workpiece and thus ensure a secure sealing of the device in this area.
  • seals 17 are provided, which are received by the washer 14 and slide on the stops 12. To drop the seals To prevent 17, expansion rings 18 can be inserted into the washer 14.
  • sealing washers 19, not shown here, can also be assigned to the mutual end faces of the tensioning element 4.
  • the ball cage 7 differs from the ball cage 7 according to Figure 1 in that it is made of a rubber-elastic material and it has a web 7d, which forms a form-fitting manner on the two-sided walls of the slightly widened slot 4b and seals it.
  • the slot 4b opposite a further recess 4f is incorporated into the clamping element 4, in which a fastened to the support member 5 feather-like anti-rotation lock 20 is fitted.
  • the clamping element 4 may be recessed in the region of the conical surface 4a, so that only certain sections of the clamping element 4 have the webs 4e supporting the balls 6. If necessary, however, two or more clamping elements 4 of the same or different diameters can be assigned to a support element 5, so that accordingly Extremely long mandrels or step mandrels are created.
  • the clamping element 4 can, as shown, manufactured as a single part, but also be composed of several parts. Depending on the configuration of the clamping element 4 and the ball cage 7, it is possible not only to clamp workpieces with cylindrical bore or cylindrical pin or neck exactly, but also to fix in the same way profiled hubs and profiled pin exactly.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jigs For Machine Tools (AREA)

Abstract

L'invention concerne un dispositif (1) de logement en position serrée d'une pièce à usiner et/ou à mesurer tournant concentriquement autour de l'axe de rotation (2) d'une machine, le dispositif étant composé d'un élément de serrage (4) présentant une surface annulaire conique (4a), d'un élément d'appui (5) présentant une surface conique identique (5a), et d'un organe de serrage (7) déplaçant les deux éléments en direction axiale l'un par rapport à l'autre, l'élément de serrage (4) présentant au moins une entaille (4b) s'étendant en direction axiale. Selon l'invention, une cage à billes (7) en forme de ressort-bague, conique de manière similaire et munie d'une pluralité de billes (6) de même diamètre, repose sur la surface conique (4a) de l'élément de serrage (4), et l'élément de serrage (4) est relié à force par les billes (6) à la surface (5a) de l'élément d'appui (5) présentant le même cône.
PCT/EP2016/080321 2015-12-15 2016-12-08 Dispositif de serrage de pièces WO2017102558A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202015008601.2U DE202015008601U1 (de) 2015-12-15 2015-12-15 Spannvorrichtung für Werkstücke
DE202015008601.2 2015-12-15

Publications (1)

Publication Number Publication Date
WO2017102558A1 true WO2017102558A1 (fr) 2017-06-22

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2016/080321 WO2017102558A1 (fr) 2015-12-15 2016-12-08 Dispositif de serrage de pièces

Country Status (2)

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DE (1) DE202015008601U1 (fr)
WO (1) WO2017102558A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112091254A (zh) * 2020-08-26 2020-12-18 江西昌河航空工业有限公司 一种内孔夹紧装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108213480A (zh) * 2016-12-15 2018-06-29 中国航空工业集团公司济南特种结构研究所 一种薄壁衬套加工工装
CN107186653B (zh) * 2017-07-31 2021-05-04 中核(天津)科技发展有限公司 一种多点支撑内腔式筒状件定位装置及定位方法
CN107218912B (zh) * 2017-07-31 2021-05-04 中核(天津)科技发展有限公司 一种基于可胀支撑内腔式定位的三坐标测量机及测量方法
CN107202562B (zh) * 2017-07-31 2021-05-04 中核(天津)科技发展有限公司 一种基于多点支撑内腔式定位的三坐标测量机及测量方法
CN107246856B (zh) * 2017-07-31 2021-05-04 中核(天津)科技发展有限公司 一种可胀支撑内腔式筒状件定位装置及定位方法
CN113251892B (zh) * 2021-05-20 2023-04-07 福建威而特旋压科技有限公司 一种高精度皮带轮跳动检具
CN114101504B (zh) * 2021-10-15 2024-01-23 内蒙古工业大学 一种用于金属血管支架热定型的通用工装夹具

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB565256A (en) * 1943-06-10 1944-11-02 Fischer Bearings Company Ltd Improvements relating to mandrels for supporting and driving rotating workpieces
US2819906A (en) * 1953-10-21 1958-01-14 Cushman Chuck Co Collet chuck
US4021051A (en) * 1975-03-08 1977-05-03 Yutaka Seiko Kabushiki Kaisha Chuck for machine tools
US5788249A (en) * 1995-05-26 1998-08-04 Tagami; Tetsuro Cutting tool chuck for chucking cutting tool
US5979267A (en) * 1996-11-12 1999-11-09 Kabushiki Kaisha Kosmek Clamping device
DE102004011727A1 (de) * 2004-03-05 2005-09-22 Index-Werke Gmbh & Co. Kg Hahn & Tessky Spannkopf

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB565256A (en) * 1943-06-10 1944-11-02 Fischer Bearings Company Ltd Improvements relating to mandrels for supporting and driving rotating workpieces
US2819906A (en) * 1953-10-21 1958-01-14 Cushman Chuck Co Collet chuck
US4021051A (en) * 1975-03-08 1977-05-03 Yutaka Seiko Kabushiki Kaisha Chuck for machine tools
US5788249A (en) * 1995-05-26 1998-08-04 Tagami; Tetsuro Cutting tool chuck for chucking cutting tool
US5979267A (en) * 1996-11-12 1999-11-09 Kabushiki Kaisha Kosmek Clamping device
DE102004011727A1 (de) * 2004-03-05 2005-09-22 Index-Werke Gmbh & Co. Kg Hahn & Tessky Spannkopf

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112091254A (zh) * 2020-08-26 2020-12-18 江西昌河航空工业有限公司 一种内孔夹紧装置

Also Published As

Publication number Publication date
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