DD159861A1 - ANGLE MEASURING DEVICE USING A ROUND INDUCTOSYN, ESPECIALLY FOR NUMERICALLY-CONTROLLED MACHINE TOOLS - Google Patents

Abstract

The aim and object of the invention is to provide an angle measuring device, wherein the distance between the measuring system components (stator and rotor) remains constant even when the turntable is raised and thus a stable measured value detection and transmission is ensured. The task is solved by pressing a corrugated spring washer with a preload between rotor carrier and cover, the movable component of the angle measuring device (rotor, rotor carrier, cover) constantly on the axial bearing located in the stator carrier and thus the stationary component (stator, stator carrier, flange) , and the distance between stator and rotor once set during assembly remains absolutely constant.

Description

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Title of Sr findiaig

V / inkeimeßeinrichtung using a Rundinductosyns, especially for numerically controlled machine tools.

Field of application of the invention

The invention relates to a Winkelraeßeinrichment for numerically controlled machine tools, especially for turntables, wherein the distance between the stator and the rotor Rundinductosyns remains constant even when lifting the turntable.

Characteristics of bek annten technical een Lös clothes en

Purely the angle measurement on rotary tables in machine tools Rundinductosyne be used. It consists in principle of a fixed part (stator) and a movable part (rotor), between which in the functionally assembled state there is a certain, constantly maintained distance, which is necessary for proper Hesswerterfassung and transmission. Bs are solutions analogous to Linearmeßsystemen known, the stator on the fixed support, the machine carriage, and the rotor on the movable machine part, the turntable, are fixedly mounted. During the displacement or rotational movement of the movable relative to the fixed machine part, a change in the distance between the two machine parts can occur due to errors in the mechanical production, which in turn can lead to inaccuracies of the measured value detection and transmission.

As an example of errors in mechanical manufacturing, z. 3rd at the GDR WP. 104 743 Non-parallelism above horizontal guideways (10, 11, 14)! and. the vertical guideways (17j 10), which lead to a distance difference between the stator and rotor ^: '.

As the movable turntable rotates relative to the fixed support, the machine carriage, increased friction occurs, which consequently requires more drive energy. To accomplish a smooth rotational movement of the turntable relative to the

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Fixed support solutions are known, the turntable is aerostatic or hydrostatic increased by a few hundredths of a millimeter. As a result, a change in the distance of the two machine parts occurs with each other, which can lead to falsifications or even egg in the case of stationary arrangement of the two Meßsystemkompqnenten (stator and rotor) to the acquisition of the measured values.

The aim of the invention is to provide a Winkelmeßeinrichtimg, which does not affect the change in distance during the lifting of the rotating relative to the stationary machine part in the rotational movement within the measuring system and thereby ensures a constant data acquisition and «transmission.

The object of the invention is that by the action of suitable resilient elements, between the rotor arm and the system covering element which is firmly connected to the turntable5 the two Meßsystemkomponenten (stator and rotor) are kept at a constant distance.

An essential feature of the invention is that the angle measuring device using Rundinductosyns, in particular for numerically controlled machine tools, these from known per se, such as a fixed part of a machine slide with a flange} on which a stator with mi't a stator is screwed, and the moving part, which consists of a turntable. which is 'screwed' to a rotor carrier with a rotor, a guide ring and a cover, wherein the corrugated spring washer 5 is arranged between the rotor carrier and the cover in an annular groove of the rotor carrier and a thrust bearing between the stator carrier and the filling ring is arranged, the distance between the stator and the rotor set once during assembly with the :: ::! Turntable, is maintained.

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Another characteristic feature is that the rotor carrier is screwed over two flat springs against rotation with the lid.

Exemplary embodiment.

Pig. 1 shows in cross-section the schematic representation of the Inductosyn measuring system in the turntable in connection with the machine slide.

Pig. 2 shows the associated plan view with the lid lifted off.

On a machine slide 1, a turntable 2 is arranged. In the machine carriage 1, a planchet 3 is inserted, which projects into the space 4 of the turntable 2 provided for this purpose. At the flange 3, a stator 5 is screwed, which receives a stator 6. The stator 6 is externally bolted to the stator support · 5 and centered with its inner diameter at the collar outer diameter 7 of the stator 5. The lower ring of the arranged between the stator 5 and a guide ring 8 thrust bearing 9 is inserted in the stator support · 5 and the upper ring centered on the lower outer collar 10 of the guide ring 8. The guide ring 8 has an internal bore 11 which is provided with a corresponding fit for allowing a guide pin 12 to slide therein The guide pin 12 is pressed into a cover 13, which in turn is bolted to the turntable 2.

A rotor 14 is centered on the upper outer diameter 15 of the guide ring 8 and abuts against a rotor carrier 16. The rotor arm 1> is screwed to the guide ring 8 and thereby, .der. intermediate rotor 14 clamped. The rotor carrier 16 is screwed against the cover 13 by means of two flat springs 17 in a manner secure against rotation.

Between a rotor-carrier 16 and the cover 13 is located in an annular groove 18 of the rotor support 16, a V / ellfederscheibe 19 ·

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The angle measuring device works as follows?

The slight rotation of the turntable 2 relative to the machine carriage 1 is achieved by hydrostatic _lifting's wherein a gap 20th At the same time occurs so that the resilient action of the corrugated spring washer used with bias 19, by the force of the complex rotor arm 16, rotor 14 and guide ring 8 _S as the movable part of the Induetosyn LIeßsystems, constantly pressed against the thrust bearing in the stator · 5 thrust bearing 9, whereby the once set during assembly distance between the stator 6, the fixed part of the Inductosyn ~ measuring system ₅ and the rotor 14 _{S is} kept absolutely constant with raised turntable.

Claims (2)

Ό - E rfind ungsanspruch 1. Win Irae device using a. Rotary inductosyns, in particular for numerically controlled machine tools, these being known per se, such as a stationary part, consisting of a laminating machine (1) with a planchet (3) on which a stator support (.5) with a stator (6 ), and the moving part, which consists of a turntable (2) on which a rotor carrier (16) with a rotor (14), a guide ring (8) and a cover (13) is screwed, is marked dadurc h, that by an inserted with preload wave spring washer (19) disposed between the rotor support (16) and the cover (13) in an annular groove (18) of the rotor carrier (16) is arranged, and a thrust bearing (9) interposed between the stator carrier (5) and the guide ring (8) is arranged, the distance between the stator (6) and the rotor (14) once set during assembly is maintained when the turntable (2) is raised. 2. Angle measuring device according to item 1, .gekennz; eiohnet characterized in that the rotor carrier (16) via two flat springs (17) is screwed against rotation with the cover (13). Pages drawings - O