Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B23/00—Tailstocks; Centres
  • B23B23/005—Tailstocks; Centres the centres being adjustable
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B23/00—Tailstocks; Centres
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B24—GRINDING; POLISHING
  • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
  • B24B41/00—Component parts such as frames, beds, carriages, headstocks
  • B24B41/06—Work supports, e.g. adjustable steadies
  • B24B41/061—Work supports, e.g. adjustable steadies axially supporting turning workpieces, e.g. magnetically, pneumatically
  • B24B41/062—Work supports, e.g. adjustable steadies axially supporting turning workpieces, e.g. magnetically, pneumatically between centres; Dogs
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B24—GRINDING; POLISHING
  • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
  • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
  • B24B5/02—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work
  • B24B5/04—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding cylindrical surfaces externally

Definitions

• Tailstock device for support and / or centering
• the invention relates to a tailstock device for supporting and / or centering a workpiece.
• tailstocks serve, in particular, to support the end of a workpiece opposite the chuck, preferably the end face of the workpiece.
• a tailstock for a grinding machine is known.
• the tailstock has a riding ⁇ stock lower part and a tailstock upper part, which is a
• Swivel axis are pivotally connected together.
• the tailstock To carry out the pivoting movement, the tailstock on a pivot drive.
• the Reit ⁇ stock upper part which carries the support means for the workpiece to be pivoted into a working area of a grinding wheel in or out of this work area.
• the sleeve axis of the tailstock extends tan ⁇ gential to the pivot axis.
• the tailstock device has a carrier device.
• the carrier device is adapted to be connected to a machine tool and has, for example, corresponding fastening means.
• a tailstock is arranged.
• the inner end of the tailstock arm is pivotally mounted about a pivot axis on the support means.
• the tailstock arm has support means.
• the support means may comprise a centering tip which cooperates with a centering bore provided in the end face in the workpiece to support and / or center the workpiece.
• the rotary actuator has a first tire ⁇ matic cylinder and a first coupling device.
• a piston of the first pneumatic cylinder is ⁇ wegungsgekoppelt via the first coupler ⁇ averaging means with the inner end of Reitstockarms be.
• the first coupling device is guided in such a way that it at least reduces or completely eliminates a force ⁇ retroactive effect on the first pneumatic cylinder by a kind of self-locking, if a torque is applied to the tailstock arm located in the working position the pivot axis is exerted, which urges the tailstock arm from the working position in the direction of rest.
• the first Kopplungseinrich ⁇ tion has a rotatably connected to the inner end of the tailstock arm and extending from the pivot axis to a lever end extending pivot lever.
• the first coupling device can alswei ⁇ sen a connecting member, which is rotatably connected by means of a first joint with the He ⁇ belende.
• the connecting member may also be rotatably connected via a second joint with a Betschistsele ⁇ ment.
• the actuator in turn is preferably immovably connected to the piston of the first pneumatic cylinder in a longitudinal direction in which the piston in the cylinder housing can move back and forth.
• the longitudinal direction is oriented, for example, at right angles to the pivot axis.
• the first coupling device forms ⁇ in a lifting gear.
• the actuator has preference ⁇ , only a single degree of freedom in the longitudinal direction. It can be connected to a piston rod of the first Pneuma ⁇ tikzylinders.
• the connecting member in the working position of the tailstock substantially is aligned at right angles to the swivel pole.
• an angle is meant which corresponds approximately to 90 °, and may be at ⁇ play in the range between 80 ° and 100 °.
• connection ⁇ member is aligned in the working position of the Reitstockarms in Wesentli ⁇ surfaces at right angles to the actuating element.
• the link extends in the working position of the tailstock arm approximately parallel to the tailstock arm or inclined at an acute angle, the amount is a maximum of 5 ° or a maximum of 10 ° or a maximum of 15 °.
• the orientation of the link in the working position of the tailstock arm can be almost or completely eliminated when applying a torque to the tailstock arm about the pivot axis of a force reaction towards the piston of the first pneumatic cylinder out. If the connecting member is positioned at right angles or nearly perpendicular to the longitudinal direction, no torque or only a small force can be transmitted to the actuating element by the torque of the tailstock arm, so that a compression of the air in the pneumatic cylinder can be excluded. This leads to a high rigidity of the arrangement in the working position of the tailstock.
• the actuating element is preferably movable only in one degree of freedom and in the embodiment game arranged in a longitudinal direction displaceable on the support means.
• the tailstock device has in a preferred embodiment, a stop which is arranged in the support ⁇ device or formed by the support means. In the working position of the tailstock arm, the rotary actuator urges the tailstock arm against the stop.
• the stop is preferably associated with the inner end of the tailstock ⁇ arms.
• the carrier device has a main body which is set up for connection to the machine tool.
• a corresponding fastening means may be present on the base body.
• On the main body is preferably a carriage in a single degree of freedom movable.
• the carriage may for example be arranged displaceably on the base body.
• the carriage may for example be mounted displaceably in a transverse direction at right angles to the longitudinal direction via a guide device.
• the guide means may comprise biased cross roller guides to achieve a play-free guidance.
• the transverse direction is aligned according to the example parallel to the pivot axis.
• the tailstock arm In the working position, the tailstock arm preferably extends in a height direction at right angles to the longitudinal direction and at right angles to the transverse direction, starting from the pivot axis towards its outer end.
• a linear drive is present in a preferred embodiment, which has a second pneumatic cylinder and a second coupling device.
• Carriage can be moved or positioned relative to the base body.
• Part-turn actuator pneumatically actuated
• the second coupling device preferably has a link part with a backdrop path defining scenery. Along the slide track a link element is arranged movable.
• the link element is immovably arranged on the base body and protrudes into the backdrop. Since ⁇ it can pass through the carriage through a corresponding Ausspa ⁇ tion through.
• the link element is in particular ⁇ slidably mounted in the longitudinal direction on the carriage. The link element, the carriage and the Grundkör ⁇ per form, so to speak, a cross slide assembly .
• a piston of the second pneumatic cylinder is movable in the longitudinal direction, wherein the link member may be immovably connected in the longitudinal direction with the piston of the second pneumatic cylinder.
• the scenery part is Preferably, only in one degree of freedom and ⁇ in accordance with the game in the longitudinal direction movable on the carriage or the base body arranged.
• the carriage is mounted at right angles to the longitudinal direction in the transverse direction movable on the base body.
• the second pneumatic cylinder and the gate part are on the
• the slide track is in particular obliquely to the longitudinal ⁇ direction and arranged obliquely to the transverse direction.
• the slide track includes an inclination angle with the longitudinal direction, which is constant, for example.
• the angle of inclination is preferably less than 45 ° to achieve a reduction of the path from the second pneumatic cylinder to the carriage. Due to this angle of inclination, a force transmission from the second pneumatic cylinder to the slide is achieved in addition to the path reduction. It is preferred if the angle of inclination is a maximum of 30 ° or a maximum of 20 ° or a maximum of 10 °. This provides a very good movement control of the carriage can be reached via the Volu ⁇ volume flow of air can be triggered without jerky movements ⁇ sled.
• FIG. 3 is a plan view of the tailstock device of FIG. 2 without cover
• Fig. 4 is a perspective sectional view of the tailstock device gem. 1-3 along a section line IV-IV in Fig. 3,
• Fig. 5 is a perspective sectional Operaildarstel ⁇ ment of the embodiment of the tailstock device according to FIGS. 1-4 along the section line VV in Fig. 3 and
• Fig. 6 is a perspective sectional view through a support means of the embodiment of the riding ⁇ stock device according to FIGS. 1-5 at right angles to a transverse direction.
• FIG. 1 shows the com plete ⁇ tailstock device for attachment to a machine tool.
• the tailstock device 10 serves to support and / or center a workpiece, in particular a cylindrical workpiece.
• the tailstock device 10 has a support device 11 which has a centering tip 12 in the embodiment or is formed by the centering tip 12.
• the tailstock device 10 has a carrier device 15 on which a tailstock arm 16 is arranged pivotable about a pivot axis S.
• the tailstock arm 16 can be pivoted in the embodiment about the pivot axis S in about 90 ° between a working position A and a rest position R (Fig. 1).
• the Reitstockarm 16 S of the riding ⁇ stockarms 16 extends in the height direction H of the pivot axis away to an outer end 16a toward.
• the support means 11 and the centering tip 12 is arranged.
• At the inner end 16b of the tailstock arm 16 is pivotally mounted about the pivot axis S.
• the inner end 16b viewed from the outer end 16a, extends beyond the pivot axis S.
• the pivot axis S extends in the embodiment ⁇ example in a transverse direction Q at right angles to the height direction H.
• the carrier device 15 has a main body 20, which is adapted to be releasably connected to the machine tool and, for example, a machine bed.
• a fastening device 21 is present on the base body 20.
• a guide device 23 for guiding the carriage 22 can be seen in FIGS. 4 and 6.
• the guide device 23 has two in a longitudinal direction L, at right angles to the transverse direction Q and the height direction H spaced rail guides 24.
• the rail guides 24 are arranged for play-free guidance of the carriage 22 on the base body 20 and in ⁇ example, gebil ⁇ det by prestressed cross roller guides.
• a shaft 28 is rotatably mounted along the pivot axis S.
• the shaft 28 is rotatably supported along the pivot axis S to, for example, two bearing points spaced apart from each other by means of a respective pivot bearing in a pivot bearing body 29.
• the two pivot bearing body 29 are attached to the carriage 22.
• the pivot drive 30 has a first Pneu ⁇ matic cylinder 31, which is designed as a double-acting cylinder.
• a piston 32 (Fig. 4) of the first pneuma ⁇ tikzylinders 31 divides the cylinder chamber into two working chambers fluidically.
• the piston 32 is connected to a piston rod 33 of the first pneumatic cylinder 31.
• the piston rod 33 protrudes from the cylinder housing.
• the piston 32 and the piston rod 33 of the first pneumatic cylinder 31 are movably mounted on the carriage 22 in the longitudinal direction L.
• the piston rod 33 belongs to a first coupling device 35, by means of which the piston 32 with the riding stockarm 16 is motion coupled.
• the first coupling device 35 can be seen in particular in FIG. 4.
• An actuator 36 is connected to the piston rod 33 of the first pneumatic cylinder 31 such that the Actuate the ⁇ restriction member 36 and the piston rod 33 are immobile relative to each other in the longitudinal direction L.
• On the piston rod 33 opposite side is the Betreliistsele ⁇ ment 36 by means of a connecting member 37 with a
• Pivoting lever 38 coupled.
• the pivot lever 38 is pivotable about the pivot axis S and protrudes from the
• a first joint 39 is present, by means of which the connecting member 37 is pivotally connected to the pivot lever 38.
• a second hinge 40 rotatably connects the actuator 36 to the link 37.
• the two joint axes of the joints 39, 40 are aligned parallel to the pivot axis S.
• a link 37 for example, serve a chain link.
• the actuator 36 is movable only in one degree of freedom in the longitudinal direction L. It is at least partially disposed in the embodiment in a Füh ⁇ approximately recess 41 in the carriage 22 and there can be supported slidingly guided.
• the pivot lever 38 is rotatably connected to the tailstock 16, for example by means of the shaft 28.
• the pivot lever 38 may be fixedly disposed on the shaft 28 or be integral with the shaft 28.
• the riding ⁇ stockarm 16 sits with its inner end 16b rotationally fixed on the shaft 28 and rotates together with the shaft 28 about the pivot axis S.
• Fig. 4 the working position A of the tailstock 16 is illustrated.
• the piston rod 33 has moved out of the housing of the first pneumatic cylinder 31.
• the Ver ⁇ binding member 37 extends between the pivot lever 38 and the actuator 36 approximately in the height direction H. It may include the height direction H and an acute angle of magnitude 10 ° to 15 °.
• the link 37 can initiate no or only a ge ⁇ rings force in the longitudinal direction L on the piston 32 of the first pneumatic cylinder 31 when the tailstock 16 is in the working position A and on the tailstock 16 a torque from the working position A out in the direction the rest position R is exercised.
• the first Kopp ⁇ treatment device 35 therefore has in the working position A of the tailstock 16 is a self-locking. Characterized the riding ⁇ stockarm 16 need not be supported by a pneumatic force of the first pneumatic cylinder 31 in the operative position A. Due to the compressibility of the air Anson ⁇ th would be no exact positioning of the Reitstockarms 16 and therefore the support device 11 or the centering point 12 accessible.
• the tailstock arm 16 is held either in the working position A or in the rest position R or between these two positions A, R pivoted.
• the tailstock 16 In the working position A, the tailstock 16 abuts against a stop 42.
• the stop 42 specifies the Hästel ⁇ ment A. He is assigned to the inner end 16b of the tailstock 16 in the embodiment.
• the stop 42 limits the pivoting movement of the tailstock arm 16 from the Rest position R in the working position A, while allowing the opposite pivoting movement unhindered.
• an undesired pivotal movement of the tailstock arm 16 out of the working position A in a direction of rotation about the pivot axis S by the stop 42 and in the entge ⁇ gennewen rotational direction by the above-described self-locking of the first coupling device 35 is avoided.
• the first pneumatic cylinder 31 and the first Kopp ⁇ treatment device 35 are arranged together with the tailstock 16 on the carriage 22 and can move with the carriage 22 in the transverse direction Q relative to the base body 20.
• a Li ⁇ near drive 45 For moving the carriage 22 along the attachable to the machine tool main body 20, a Li ⁇ near drive 45 is present, which has a second pneumatic cylinder 46, and a second coupling means 47th
• the second pneumatic cylinder 46 is arranged on the carriage 22 and can move together with the carriage 22 in the transverse direction Q.
• the second pneumatic cylinder 46 is designed as a double-acting cylinder.
• the second pneumatic cylinder 46 is for example arranged according to parallel with the first pneumatic cylinder 31 so that the piston of the second pneuma ⁇ tikzylinders 46 bewe ⁇ gene may in the longitudinal direction L in the cylinder housing.
• the piston of the second pneumatic cylinder 46 is connected to a piston rod 48 of the second pneumatic cylinder 46, which protrudes from the cylinder housing and on its free end is connected to a link part 49.
• the link part 49 and the piston rod 48 are immobile in the longitudinal direction L ⁇ relative to each other.
• the link member 49 and the piston rod 48 can be moved together and have the embodiment only a BEWE ⁇ tion degree of freedom in the longitudinal direction L.
• the link member 49 is connected via two parallel to each other in the longitudinal direction L extending guide rails 50 in
• the two guide rails 50 together with the link member 49 can each form a roller bearing guide and, by way of example, a cross roller bearing guide (FIGS. 5 and 6).
• the guide rails 50 are attached to the carriage 22.
• the link member 49 can be moved in the longitudinal direction L relative to the carriage 22 by a corresponding pressurization of the second pneumatic cylinder 46.
• a link 51 is present, which is bounded by two mutually parallel Kulissenflä ⁇ Chen 52.
• the two slide surfaces 52 may be formed by groove flanks of a groove in the guide member 49 or - as in the embodiment shown here - by the ge ⁇ opposite side walls of a slot 53 which passes through the guide member 49.
• the gate 51 and the two sliding surfaces 52 define a slide track, along which a link element 54 and the Kulis ⁇ senteil 49 are movable relative to each other.
• the slide track is rectilinearly parallel to the two slide surfaces 52 or parallel to the slide 51.
• the slide track is inclined at an angle of inclination relative to the longitudinal direction L (FIGS. 5 and 6).
• the angle of inclination is significantly smaller than 45 °, for example and is preferably at most 30 ° or at most 20 °. In the embodiment, the inclination angle is 10 °.
• the link element 54 is immovably connected to the base ⁇ body 20. It has, for example, a pin which protrudes away from the base body 20 in the height direction H. To reduce wear and friction can be arranged coaxially to the pin 55 at the portion of the pin 55 which passes through the link 51 or projects into the link 51 into it.
• the sleeve 56 is in the Ausry ⁇ tion example rotatable about the axis of the pin 55 angeord ⁇ net.
• the outer diameter of the sleeve 56 is slightly smaller than the distance between the two sliding surfaces 52, so that the sleeve 56 with the smallest possible play in the backdrop
• the link element 54 or the pin 55 passes through a passage opening 57 in the carriage 22 (FIGS. 5 and 6).
• the passage opening 57 has a sufficiently large dimension in the transverse direction Q, so that the movement of the carriage 22 relative to the base body 20 is not impeded by the link element 54.
• the link element 54 or the pin 55, together with the passage opening 57, can define the two maximum movement positions of the carriage 22 relative to the base body 20 and, as it were, represent a movement limitation in the form of a stop.
• the passage opening 57 can be designed, for example, in the form of an oblong hole extending in the transverse direction Q.
• Longitudinal direction L (within the plane defined by the longitudinal direction L and the transverse direction Q) takes place.
• the link member 49 can not move in the transverse direction Q relative to the carriage 22.
• the stroke of the piston of the second pneumatic cylinder 46 is reduced by the second Kopp ⁇ treatment device 47 in a linear movement of the carriage 22 relative to the base body 20.
• the axis of the center point 12 extends parallel to the pivot axis S, and according to the example in the transverse direction Q.
• About the movement of the carriage 22 can thus be brought into engagement with a workpiece, the centering ⁇ top or 12, are pressed against the workpiece or be removed from the workpiece.
• a sufficiently large force can be transmitted to the tailstock arm 16 via the second pneumatic cylinder 46, with which the tailstock arm 16 or the support device 11 can be moved or pressed against a workpiece.
• the force which the second pneumatic cylinder 46 provides in the longitudinal direction L is determined by the second coupling means 47 translated into a force with which the support means 11 and the centering tip 12 can be pressed in the transverse direction Q against a workpiece.
• the riding apparatus ⁇ stock a cover 60 which at the
• Carriage 22 is attached.
• the cover 60 covers the pivot drive 30 and the linear drive 45 and verhin ⁇ changed that can fall from the workpiece falling chips in the Be ⁇ rich two relatively movable parts.
• the invention relates to a tailstock device 10 for supporting a workpiece in a machine tool, for example a grinding machine.
• the Reitstockvorrich ⁇ tung 10 has a pivotable about a pivot axis S gela ⁇ siege Reitstockarm 16, a centering point 12 is disposed at the outer end 16a, which is aligned parallel to the pivot axis ⁇ S.
• a pivot drive 30 with a first pneumatic cylinder 31 of the tailstock arm 16 between a working position A and a rest position R is pivotable. The movement of the piston 32 of the first pneumatic cylinder 31 is transmitted to the tailstock arm 16 via a first coupling device 35.
• the first coupling device 35 assumes a self-locking position, in which a force reaction, triggered by a torque, that the tailstock arm 16 from the working position A in the rest position R urges, not or only slightly reverts to the piston 32 of the first pneumatic cylinder 31.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Machine Tool Units (AREA)
• Turning (AREA)
• Actuator (AREA)
• Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
• Jigs For Machine Tools (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=56799467

Family Applications (1)

Country Status (9)

Families Citing this family (2)

Family Cites Families (12)

• 2015
  • 2015-09-10 DE DE102015115206.1A patent/DE102015115206B4/de active Active
• 2016
  • 2016-07-27 TW TW105123670A patent/TW201718176A/zh unknown
  • 2016-08-24 EP EP16756696.7A patent/EP3347152A1/de not_active Withdrawn
  • 2016-08-24 KR KR1020187009077A patent/KR20180052655A/ko not_active Application Discontinuation
  • 2016-08-24 AU AU2016318559A patent/AU2016318559A1/en not_active Abandoned
  • 2016-08-24 US US15/758,943 patent/US20190039144A1/en not_active Abandoned
  • 2016-08-24 JP JP2018512178A patent/JP2018527207A/ja active Pending
  • 2016-08-24 WO PCT/EP2016/069945 patent/WO2017042029A1/de active Application Filing
  • 2016-08-24 CN CN201680052442.8A patent/CN107921548A/zh active Pending

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