DE2006889A1 - Machine tool with combined workpiece gauge and workpiece setting device - Google Patents

Description

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Machine tool with combined workpiece measuring gauge and workpiece dividing device

The invention relates to a machine tool for machining rotating, Workpieces held between centers with annular and cylindrical surfaces, with one to and from the workpiece movable tool, with a device for axial displacement of the workpiece held between the punch tips, with an adjusting device for precise axial alignment of the workpiece with respect to the tool as well as with a to Workpiece movable tangential gauge.

Means for axially adjusting a workpiece with respect to the grinding wheel of a grinding machine are already known, for example from US-PS 3,064,395. Such devices comprise hydraulic means for turning a screw with which the headstock center, the workpiece and the tailstock center be moved so that the workpiece in an accurate Working position reaches the grinding wheel. The Movement path of an annular surface part of the axial to be set workpiece brought an adjusting finger that the exact axial position of the workpiece with respect to the grinding wheel scans and stops the axial movement of the center punch, as soon as the workpiece has reached the intended working position »Then a tangent measuring gauge is used during grinding -

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20D6889

brought into contact with a cylindrical surface of the workpiece in order to achieve the desired grinding work on the workpiece determine. As soon as this is achieved, the grinding work on the cylindrical surface is finished.

So far, the devices for axial adjustment of the UJerkstückes and to create the tangential gauges independently of each other arranged and lousy separate control devices.

These arrangements were relatively expensive in terms of soiuohl the required space as well as the required Parts and manufacturing costs.

The invention is therefore based on the problem of avoidance a summary of the disadvantages mentioned Develop measuring and control devices.

The invention consists in that on a movable transversely to the workpiece, With a single drive device connected frame, a carrier is attached, which both drive means of the Adjusting device as well as the tangential measuring gauge carries.

In order to avoid that the tangential measuring gauge during the adjustment process of the workpiece grinds on this

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advantageously provided that the tangential gauge opposite the carrier is arranged so as to be relatively movable and with -einer Rückhalteeinrichtunq connected is. .

An advantageous embodiment is that the Tangentiaimeßlehre on the one hand via a leaf spring element formed prestressed spring frame and on the other hand via a rigidly attached to the carrier pressure cylinder with the carrier is connected and aufmeist means for displaying the machining dimension of the workpiece.

A further embodiment according to the invention consists in that a drive fork is rigidly connected to the carrier, which engages with an actuating arm which can be moved transversely to the workpiece and is attached at one end to a shaft mounted in the machine frame, which has a feeler pin for display the snllotel l ^{and <} H of the workpiece.

To enable the tool and the setting device to advance at the same time to avoid, it is advantageously provided that two projections are connected to the shaft carrying the actuating arm, those in the dead spots of the shaft alternate with one of two am Machine frame arranged, with switches connected air nozzles align and be able to lock them alternately.

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Another embodiment of the invention is that the The actuating arm is designed to be flexible in the axial direction of the workpiece, e.g. has at least one weakening point, which allows him an axial compliance. This measure prevents the feeler pin of the adjusting device damaged by a collision with the axially displaced workpiece.

Another advantageous embodiment of the device according to the invention is that in the electrical control device for actuating the tangential measuring gauge and the setting device a control contact is provided which is closed when the tool support is advanced and the restraint effect of the pressure cylinder connected to the tangential measuring gauge cancels.

There is another advantageous embodiment of the invention in that the switch connected to one air nozzle with a motor relay for driving the headstock as well as with Switching means for feed or back support of the tool « supports is connected and that connected to the other air nozzle Switch is connected to a control device for the axial feed of the workpiece., This achieves that the actuator is only operated when the Tool support is in its retracted position

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and the rotary drive of the tool is stopped.

In the design of the machine tool according to the invention remains that effecting the axial adjustment of the workpiece Device effective until one is arranged on the actuating arm Feeler pin indicates the exact setting of the workpiece. The tangential gauge remains during this setting process except for contact with the workpiece, in order to avoid unnecessary wear of the tangential measuring gauge or the workpiece. Conversely, the actuating arm remains out of engagement with the workpiece when it is set in rotation and processed by the tool uiird. During this time, however, the tangential

measuring gauge on the workpiece surface to be machined.

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During the setting process, the tangential measuring gauge, which is under the feed action of a spring frame, is preferably held by a pneumatic retaining cylinder The distance between the tangential gauge and the workpiece should be advantageous be greater than half the height of the layer to be removed.

The tangential measuring gauge and the adjusting device are with suitable Control devices connected that control the movements of these Control and coordinate facilities and tool support.

A suitable limit switch is used to feed the

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Tool the feed of the tangential measuring gauge in the direction of the workpiece. Once the workpiece is machined to be Sollmafi that Tangentialmeßlehre causes the shutdown of the UJerkzeugvorschubes about qeeignete control means ₀ through geeiqnete switch is carried ensure that the adjusting device is only effective when the tool AMSTEL in a retracted position

The following is an example of an embodiment of the invention the drawing explained in more detail, namely show:

1 shows a partial front view of a grinding machine with an axially movable headstock, an axially movable tailstock and a combined measuring and adjusting device;

Fig. 2 is an enlarged side view of the combined fllleQ and adjusting means of the grinding machine shown in Figure 1 _0;

Fig. 3 is a plan view of Fig. 2;

4 is an enlarged rear view of an actuating arm;

Fig. 5 is a schematic representation of the combined care and control device and the with this connected pressure medium-actuated control organs;

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- 7 - ■■. "- ■ - ■".

6 shows an electrical circuit diagram for the control the combined lYleß and control device and

Fig. 7 is a plan view of a to be machined Workpiece and a grinding tool that is in engagement with it.

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Fig. 1 shows a grinding machine 9, in which the inventive Workpiece measuring and setting device attached / ends / earthed can. The grinding machine 9 comprises a machine bed 10 on which a carriage 11 is guided. The carriage 11 carries a headstock 12 and a tailstock 13, between which a workpiece is held, both ring-shaped and cylindrical Has surface sections, which by a Schleifinθ3ί »ηι.ηρ-14 should be sanded, which in turn on a Grinding wheel support 79 is arranged on the machine bed can be bent from and to the workpiece.

Means for moving the grinding wheel 14 back and forth are known per se. Likewise, the tailstock 13 also carries a center point 15, which can be selected in a conventional manner or with suitable means is axially movable. The headstock 12 comprises an axially movable hollow shaft 16 in which a further center point 17 is guided and held, which in turn engages the workpiece UJ and in a suitable manner with a precisely working axial feed device is provided, which adjust the workpiece W precisely with respect to the grinding wheel 14 able.

The grinding wheel 14 is inclined with respect to the workpiece axis arranged and has conical grinding surfaces 18, 19 and 20, those for grinding the cylindrical workpiece surfaces 22, 23 and the annular workpiece surfaces, such as surface 24 in

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Fig. 7 serve.

-Zuiischen the headstock 12 and dsm tailstock 13 is arranged on a table 26, generally designated 25, a combined tangential measuring gauge and axial parting device. The table "2-6 --.- iui.rd held by a support plate 27 attached to the machine bed 10, for example at angles 2% (FIG. 1).

Fig. 2 shows .that the device 25 to and from the workpiece W is arranged movably. The device 25 is covered by a housing cover ^ added when it is in the retracted position from the workpiece, whereby this device during the insertion of each workpiece; Ul add the tips of the grain 15. and 17 remains protected.

A roughly trained Tangentlalmeßlehre 3.1 carries on a pair of hard metal inserts 32, 33, which are attached to the Lindric surface of a Ulerkstückes W can attack. (KIittig in the Tangentialmeßiehri 31 is also a suitable one Arranged air jet piston 34, which serves to the Schleifluirkung on the associated cylindrical surface when it is within the allowable tolerances.

A pivotable actuating arm 35, which will be described in more detail below, encloses a holder 36 for an air-pressure operated feeler pin which is attached to an annular surface of the workpiece UJ *

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To hold the Tangentialmeßlehre 31 and the actuating arm 35 is a base plate 37 is provided. On this base plate 37 is the Actuating arm 35 articulated via a housing 38, which in turn carries a centrally rotatably mounted UJelle 4G, which the actuating arm 35 Suitable bearings are provided inside the housing 3B, to ensure that the UJelle 40 can be swiveled easily. That Housing 3Θ ends on one side, as shown in FIG. 3, in a hub 41, which carries the UJelle 40 and on the other side in a cap 42. The hub 41 is on the UJelle 40 by means of a threaded eye 43, the head of which is visible in FIG. ζ.Β «screw bolt 44,45 (Fig. 2) held, which go through the actuating arm 35 into the hub 41 and thus connect the actuating arm 35 to the hub 41 attached to the UJelle 40.

A distribution head 46 carried by the base plate 47, has a pair of self-cleaning air nozzles 47, 48 near the hub 41, while a pair of projections 50, 51 protrude from the hub 41 extend out that can be aligned with the air nozzles the actuating arm 35 is completely pivoted against the workpiece UJ, so arrives the projection 50 is in alignment and blocked with the air nozzle 47 so that the air flow emerging from the air nozzle is sufficient enough to trigger a signal that the full Schuienk · Wtg of the actuating arm 35 indicates. In a similar way, the projection 51 comes into alignment with the other air nozzle 48

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Actuating arm 35 has been uieggeschwenkt completely from the workpiece Ul and is located under the housing hood 3D. The one from the air vent 48 exiting air jet is then sufficient from the projection 51 blocks that a signal can be produced that indicates the retraction position of the actuating arm 35. »

The pivoting movement of the actuating arm 35 is carried out by a drive fork 52 held by a movable support 53. The drive fork 52 has a downwardly open Slot 54, in which a fixedly connected to the actuating arm 35 Drive pin 55 protrudes. The movement of the drive fork 52 from and to the workpiece W then causes a pivoting of the actuating arm 35. ^ "

As shown in FIG. 4, the actuating arm 35 is particularly limited Resilience equipped by placing between the Drive pin 55 and the feeler pin holder 36 have a weakening point 49 is provided. Thus, if the Stellar 35 engages with the Filling pen holder 36 on workpiece W, the actuating arm bends 35 something at the weakening point 49 without affecting the elastic limit is exceeded, so that the actuating arm 35 and the feeler pin attached to it is protected from damage.

A further weakening point 56 also sees a pin *. '! .lung the axial position of the feeler pin holder 36 on the actuating arm 35 before. The stylus holder 36 and a finger-shaped part 57 of the

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Actuating arm 35 is at the Schu / ächunqsstelle 56 with the rest Part of the actuator arm connected. A pair of screws 58, 60 extend through the part 57 and cause an adjustment of the feeler pin holder 36 by bending the actuating arm 35 within the area of the weakening point 56.

The carrier 53 (Fig. 2), which carries the drive fork 52, also carries the tangential jig 31 and moves it to and from the workpiece UJ. An adjustable block 69 is fastened to the carrier 53 by means of a screw 61 protruding through a slot 62 of the block 69. The block 69 carries a pair of horizontally extending leaf springs 63, 64, a pair of holders 65, 66, which in turn resiliently support the tangential measuring gauge 31 by means of a pair of perpendicular leaf springs 67, 68. The Tangentialmeßlehre 31 is thereby fedeind so that it can perform both perpendicular and horizontal movements with respect to the carrier 53 _e

A movement of the carrier 53 and the drive fork 52 to and from the workpiece UJ at the same time causes an advance or retraction movement the Tangentialmeßlehre 31 and the actuating arm 35. The carrier 43 is fastened on a clamp 70 which has a connecting rod H. 71 surrounds. The connecting rod 71 has a transverse bore in which a guide rod 72 is held and by means of a Screw 73 is attached »

A shield 74 fixedly attached to the base plate 37 carries one

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Guide block 75, "through which the * guide rod-B 72 extends- · In the guide block 75 are suitable Rollon or other bearings provided that engage the guide rod 72 when this moves through the guide block 75 and thereby guides the movement of the carrier 53 and the clamp 70 ·

The connecting rod 71 is to and from the workpiece Ui by means of a piston rod 77 of a suitable, pneumatically driven fllotors 78 moves the piston rod -77- is connected to the connecting rod 71 by a connecting bracket BO, so that a Actuate the motor 76 in opposite directions Iforschub-odar fiiffzugsbaiyichtung the entire facility 25 causes ·

The device 25 is in its advanced position. finds, the Tangentialf Maßlohra 31 from a contact with your lüurkstück üJ held by a pneumatically actuated retaining cylinder 61, which is attached to tjinar bracket 02, which in turn participates in the movement of the device 25.

A piston rod 63 of the retaining azimuth 01 endyfc in a coupling 04, which is articulated to the tang & ntialrneeiahre 31. fädernden Halturung in bor days, a more limited Bowagung and from the t'erkotuck Ui QUBZufuhrwn. The ftückhaltezyiindßr 61 ulrd so gestouert, .- '*** § i> olaf | gö the Workatück axially mlrdj a lioufegung

Λ -% ■

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prevents the tangential measuring gauge 31, which would bring it with the workpiece W into engagement. That way becomes a Frictional contact between the hard metal inserts 32, 33 and the workpiece W is limited by the tangential measuring gauge 31 from the retaining cylinder 81 released, the Tangentialmeßlehre can under the natural spring force of the perpendicular leaf springs 67, 68 come into engagement with the workpiece W.

The mode of operation of the lYleß and setting device 25 is shown on best from Figures 5 and 6. These show the control means for this device. The control of the individual processes of a Grinding machine to which the above mentioned devices are attached Such controls for grinding machines are known per se and do not form part of the present invention are described, for example, in the above-mentioned US Pat. No. 3,064,395 "

Referring to Figure 5, the air operated pin is removed from the bracket 36 of the actuating arm 35 is carried, connected via a line 90 to a control device 91, which, for example, is known per se or appropriately selected air or pressure actuated switches may have which are able to provide electrical excitation of known control devices for the hollow shaft cause and thus a precise setting of the hollow shaft 16 held by the headstock and the center point arranged therein 17 bring about, so that the workpiece Ui with respect to the

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Grinding wheel 14 is precisely adjusted. In a similar way, the air jet piston 34 arranged in the middle of the tangential measuring gauge 31 is connected via a line 92 to a further control device 93 which also has suitable air or pressure-actuated control elements for controlling and possibly stopping a grinding process when a target tolerance occurs on the tangential measuring gauge 31 measured surface of the workpiece UJ results in ₀

The combined measuring and adjusting device 25 operates during the normal machining process of the machine after the workpiece Ui has been inserted in this between the clamp tips and the clamp tip 15 of the tailstock against the workpiece W has been moved. The device 25 is used as a single unit by applying pressure to the motor 78 via a compressed air line 94, which extends from the outlet 95 of an electromagnetic advance valve 96.

The output 95 of the valve .. 96- is available after actuation of a solenoid coil 4 SQL with a main air line which causes the feed 97 in connection.

After a workpiece W has been inserted into the machine, the tailstock 13 is moved against the workpiece W in order to clamp it between the tailstock 13 and the center point 17 of the headstock.

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The movement of the ffieitstockes 13 uiird a not shown Actuated limit switch, which causes the closure of a contact 6 CR 1 by a circuit to excite the hiecfür provided, not shown control relay is closed.

The closed contact 6 CR 1 completes a circuit a contact 2 CR 1, which is closed during the loop, by a contact 18 CR 1, which is closed when the Hollow shaft 16 is reset in the headstock, a -normally closed contact 23 CR 1 and a contact 24 CR 1, which is closed when the grinding wheel support 79 is in its retracted position. By closing this circuit, a relay 7 CR is energized.

A contact 7 CR 1 then closes in a hold circuit, the a timing relay contact 3 TR 1 parallel to the contact 18 CR 1, which opens when the hollow shaft 16 is moved forward, to carry out a positioning movement »

The contact 7 CR 2 is closed in a circuit for manual actuation of the relay 7 CR. A contact 7 CR 3 is in one Circuit for exciting the solenoid 4 SOL closed.

The solenoid 4 SOL actuates the valve 96 such that it Pressure medium leads to the motor 78, whereby the actuating arm 35 clockwise moved and the measuring and adjusting device 25 moved forward be that the actuator in the UJeq of the workpiece UJ

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2006883

brought uiird.

As soon as the measuring and adjusting device 25 reaches this position has, the protrusion 50 interrupts the flow of air through the nozzle 47. As soon as the air flow through nozzle 47 is shut off, closes a pressure switch 2 PS and thus closes one Circuit for energizing a relay 8 CR.

A contact 8 CR 1 closes in a contact 22 CR containing circuit to relay 61 CR.

Contact 22CR1 remains open when the grinding wheel support is in its retracted position. As a result, relay 61 CR remains de-energized. The same therefore remains the solenoid 24 SOL is also de-energized and the valve 102 remains in its position, with the tangential measuring gauge 31 out of contact is held with the workpiece Ul, which is due to the pressure im Cylinder 81 takes place

In this position, the control device 91 for the Hollow shaft 16 actuated to respond to the change in air pressure at the outlet of the air operated pin 29 to respond. In this The point in time is the control device 93 for the tangential measuring gauge not activated"

Another contact, not shown, of the relay 8 causes CR

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a feed of the hollow shaft 16 and the center point 17 assigned to it, as a result of which the workpiece Ui is displaced axially to the right until it is stopped when the Uierkstückflansch the pin 29 comes close.

The control device 91 for the hollow shaft 16 reacts by it stops the feed movement of the hollow shaft 16 and the workpiece Ul and thereby closes the contact 13 CR 1, the one Circuit for the excitation of a not shown, intended for this purpose control relay closes.

As soon as contact 13 CR 1 is closed, the timing relay is activated 3 TR energized, which opens after a predetermined period of time to relieve the relay 7 CR.

Then the contact 7 CR 3 opens and relieves the solenoid 4 SOL, the pressure medium to the end of the piston rod Motor 78 conducts and thus the device 25 withdraws.

The projection 51 closes the air flow through the nozzle 48 and thereby actuates the pressure switch 3 PS. This closes you Circuit for energizing relay 9 CR. A contact 9 CR 1 closes a circuit to excite the Iflotor relay 1 IflF for the headstock to set the workpiece in motion.

The grinding wheel 14 is now advanced to start the grinding process to start. When the grinding wheel 14 is advanced, a

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Limit switch 10 LS 1 closed, creating a circuit for excitation of relay 22 CR is closed.

The contact 22 CR 3 closes in a circuit which contains a tailstock limit switch 9 LS which is operated in the usual way and which remains closed as long as the tailstock 13 engages the workpiece IU. _7th

The contact 22 CR 2 closes in a circuit by a normally closed, operated in the usual way Limit switch 10 LS 2 is so that, uienn the grinding wheel support 79 is in its retracted position, a circuit for energizing the relay 23 CR closed and the Contact 73 CR 1 in the circuit to relay 7 CR g-eoff.net tuird. This causes an excitation rs-s relay 7 TR and a feed the device 25 at the end of the Schleifvorqanges avoided after the grinding wheel support 79 and the tangential measuring gauge 31 are withdrawn and the Hohliuelle 16 put back murder and before the tailstock 13 is withdrawn to the to remove finished workpiece. Contact 6 is CR 1 still closed.

The advance of the grinding wheel 14 causes the excitation of a conventional control relay (not shown) that controls the contacts

21 CR 1 and 21 CR 2 controls. '.'. -

The contact 21 CR 1 closes in a circuit to the relay

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7 CR, which is arranged in parallel with the contacts 24 CR 1 and 6 CR 1, so that the relay 7 CR can be energized, uienn the grinding wheel support 79 varies and the return movement of the grinding wheel support 79 controlling relay 24 CR is open.

Near the end of the grinding process uiird of a not shown, to a handwheel or another location of the feed gear located cam, a limit switch overall ^v included 3 LS, a circuit through the previously closed contact 2 CR 3, which at the beginning of Schleifar- Beit closed morden and a contact 21 CR 2 to close in order to energize the relay 7 CR again and advance the device 25. This IKIaI is intended to attack the xangential measuring gauge 31 on the workpiece UJ.

The contact 7 CR 2 closes to a hold circuit on the Contact 2 CR 2 to close, which is closed, if the IT machine carries out a grinding process ^ and maintains the circuit to relay 7 CR after the limit switch 3 LS opens Has.

When the device is 25 bodice in its forward position Is in position, the projection 50 blocks the air nozzle 47 and closes the pressure switch 2 HP. This creates the circuit closed to energize relay θ CR.

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...-- ■. ■ -ν .ν. - 21 - ■■■ · _v- V The contact θ CR1 closes in a circuit in which ■ the previously closed contact 23 GR 1 is located and which energizes the relay 61 CR. The contact 61 CR 1 closes in order to excite the solenoid 24 SOL, which moves the valve 102 into a position in which the cylinder 81 is connected to the ambient IuFt, so that the tangential measuring gauge 31 can now be advanced as far as possible. until it touches the workpiece.

When the "-" workpiece is ground to its target, contacts 21 CR 1 and 21 CR 2 that control the relay , relieved ,. They open in the circuit to relay 7 CR.

The grinding wheel 14 is then withdrawn, whereby the limit switch 10 LS in the circuit to relay 23 CR closes. The normally closed contact 23 CR 1 now opens in the circuit to relay 7 CR,

, Thus, now interrupted all circuits to relay 7 CR and the relay 7 CR ^relieved;

Then the contact 7 CR 3 opens to relieve the solenoid 4 SOL. This causes the valve 96 to move shifted to the left and directs pressure medium through line 100 to the end of the rotor 78 on the piston rod side, as a result of which the device 25 is withdrawn.

At the same time, the grinding wheel 14 is withdrawn,

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ttiird also the hollow shaft 16 is reset, whereby the contact 18 CR1 in the circuit to relay 7 CR is closed.

Now every contact in the circuit to relay 7 CR is with Except for the normally closed contact 23 CR 1 closed (The latter was, as warned above, when withdrawing the grinding wheel 14 opened). Without this contact the relay 7 CR would be energized again as soon as / ler Grinding wheel support 79 and the hollow shaft 16 withdrawn was. Then the device 25 would be advanced again.

Now the tailstock 13 can also be withdrawn and the finished workpiece can be removed from the machine.

In Fig. 6 is a manually operable control of the device 25 provided in the form of a push button switch PS 1, the is in direct communication with relay 7 CR to the facility 25 either move forward or backward when the machine is off her normal working position has been changed to the lYleO position.

The setting contact 3 CR 1 is then closed, the one Excitation of relay 7 CR allowed as soon as the push button switch PSS1 is pressed in to prebend the device 25 for axial adjustment or for measuring the workpiece, which depends on the position of the grinding wheel 14.

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If the grinding wheel 14 is in its retracted position, the relay 7 CR is operated via the contacts 24 CR 1 and 6 CR 1 energized, and when contact 6 CR 1 closes, uienn the tailstock 13 has assumed its full feed position.

The solenoid 4 SOL, which controls the advance of the device 25, It is energized, as described above, to drive the device 25 Pre-bend for axial adjustment of the workpiece.

When the grinding wheel 14 passes, the relay 7 becomes CR energized across contact 21 CR 1, and the push button switch PSS 1 has been depressed to advance the device 25 to carry out the IT measurement process, urenn the contact 21 CR 1 is closed. The solenoid coil 24 SOL, Luie described above, excited.

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Claims (1)

Claims 1. Machine tool to "Edit circumferential _v between the tips holding workpieces with annular and cylindrical surfaces with a to and vo" workpiece movable tool, "it means zuta axial displacement of the geholtenon between the tailstocks workpiece dos with an adjusting means for accurately axially aligning the workpiece with respect to the tool and with a tangential flow gauge movable to the workpiece »characterized» because (3) a carrier (S3) is attached to a frame (71 »72» 77) which can be moved transversely to the workpiece (ω) and is connected to a single drive device (76). Appropriate is because both the drive means (52) of the actuating device (3B) and the tangentia ^ measuring gauge (31) carry 2 · Machine tool according to claim 1, characterized in »that the tangential measuring gauge (31) is opposite the carrier (S3) is arranged relatively buiusgber and with a Retaining device (61) is connected 3 «Uerkzeugmsschinc still claim 2, characterized in that the Tangöntiolmcölehru (31) on the one hand via a » pre-tensioned spring framed (63-69) and on the other hand via a 109845/0517 ■■. "■ - ■ ~ --- '. ■ ■ -" * ■' - 25 - rigid en de «stretcher * (53) attached pressure element cylinder (St) «the ice skirts holding device serves» with the TräQer (53) is connected and means (34) for displaying the beer boitüngamaßea dee workpieces (w) aufeeiet 4 werkieupeeechine according to one of ftneprücha 1-3, d a characterized by "that with the carrier (53) a drive bracket (52) is rigidly connected, which" has a transverse to "workpiece (ti) bsneQberentiiiit its one end on a shaft (40) mounted in Woechinongeeteii Qbearm (33) attacks »which shows a feeler pen (29) for display target position doa Uferketückoe (Ut) aufueiat · 5 · ttterkzeugaiaechina according to claim 4 »d & d υ r c h g β k β η η« se ic h η ο t »deö with the one that carries the actuating arm (35) Uelle z «ei tforeprUng» (50,51) are connected »dio in the Dead spots of the echuenkable shaft (40) from «echeolnd with alner from zatsi at the iHascliinengeotoll anoeordnctttin »riding switches (2 PSf 3 pS) connected air ducts (47, AU) align and theee to block alternately 6 «Ufarkzfiugmaschinti nach einam dor fineprücho 4 oetar 5« d a · d υ r c h Q U k ο η η draws »daO the Stoliarn (35) In exialur direction ujoo üerkatückoo (tu) nacngleulg auagci educated iat * 109845/0617 BAOORlQfNAL 7. Machine tool according to claim 6, characterized in that the stellar (35) has at least one Weakening point (49,56) sufioeiet, dia give it an axial one Compliance enables 8 · Machine tool also according to claims 1-7, characterized in that in the electrical control device for the actuation of the tangential gauges. (31) and the actuating device (35) a control contact (22 CR1) is provided, which is closed when the UiorlczeuQeupport (79) is advanced and cancels the retaining effect of the pressure cylinder (B1) connected to the TangentialmeOlehre (31) Machine tool according to Claim S, characterized in that the switch (3 PS) connected to the one air nozzle (4E) has a rotor relay (\ AIP) for driving the Spindoikastena soaie with switching means for UorsQhub or backward movement of the Uiarkzöugr? L ; pports is connected and that the switch (2 PS) connected to the other air nozzles (47) connected the tut-rkstucco ( ¹ Ji) with a control device (91) for the axial feed For Littob / lnQi / striBß, INC. " Pipl.-IntjWuröIfgarfo K * Rauh PATENT ADVOCATE 109845/0517 bad original