DE3505760C2

DE3505760C2 - Device for calibration

Info

Publication number: DE3505760C2
Application number: DE19853505760
Authority: DE
Inventors: Martin Dipl.-Ing. 7310 Plochingen Eckhardt
Original assignee: Oskar Schwenk & Co Kg 7012 Fellbach De GmbH
Current assignee: Oskar Schwenk & Co Kg 7012 Fellbach De GmbH
Priority date: 1984-11-22
Filing date: 1985-02-20
Publication date: 1986-11-27
Also published as: DE3505760A1

Abstract

"Verfahren und Vorrichtung zum Kalibrieren" einer Meßwert-Anzeigeeinrichtung für eine kreiszylindrische Bohrungsmeßhülse (6) bekannten Durchmessers, mit mindestens einem gegen eine Rückstellkraft radial bewegbar in der Hülsenwandung gelagerten Tastkörper (Stifte 8) zur Berührung der Wandung einer zu messenden Bohrung größeren Durchmessers, der kleiner ist als der Abstand des Tastkörper-Berührungspunktes vom diametralen Hülsenpunkt bzw. Berührungspunkt eines anderen, diametralen Tastkörpers (8), falls jeder Tastkörper-Berührungspunkt seine maximale Entfernung vom Hülsenzentrum hat. Um mit einfacheren Hilfsmitteln als mit Lehrringen, Meisterstücken oder Endmaßeinrichtungen zur Verkörperung eines Referenzmaßes zum Kalibrieren auszukommen, wird vorgeschlagen, daß der Berührungspunkt (9) jedes Tastkörpers (8) in die Mantelfläche (Schliff 21) der Hülse (6) verlegt und dort so lange gehalten wird, bis die Anzeige der Einrichtung auf den gegebenenfalls verminderten (Schliffe 21) bekannten Hülsendurchmesser längs der Tastkörper-Bewegungsrichtung als Meßwert eingestellt ist, indem eine Vorrichtung (21 bis 28) verwendet wird, die in einer bevorzugten Variante durch mindestens ein Teil (Plättchen 26) mit einer ebenen Justierfläche (28) gekennzeichnet ist, die an einem ebenen Schliff (21) der Mantelfläche (7, 21) der Hülse (6), welcher parallel zu deren Zylinderachse und senkrecht zur Bewegungsrichtung des aus dem Schliff (21) hervortretenden, zugeordneten ..."Method and device for calibrating" a measured value display device for a circular cylindrical bore measuring sleeve (6) of known diameter, with at least one probe body (pins 8) mounted radially against a restoring force in the sleeve wall for contacting the wall of a larger diameter bore to be measured, the is smaller than the distance of the probe body contact point from the diametrical sleeve point or contact point of another, diametrical probe body (8), if each probe body contact point has its maximum distance from the center of the sleeve. In order to make do with simpler tools than with ring gauges, master pieces or gauge blocks to embody a reference dimension for calibration, it is proposed that the contact point (9) of each probe body (8) be placed in the outer surface (ground 21) of the sleeve (6) and there for so long is held until the display of the device is set to the possibly reduced (grinding 21) known sleeve diameter along the probe body movement direction as a measured value by using a device (21 to 28), which in a preferred variant by at least one part (plate 26) is marked with a flat adjustment surface (28), which protrudes on a flat section (21) of the lateral surface (7, 21) of the sleeve (6), which is parallel to its cylinder axis and perpendicular to the direction of movement of the section (21) , assigned ...

Description

3 '3 '

Durchmesser selbst erst genau bestimmt werden muß. dargestellten Azeigeeinrichtung für den Meßwert desDiameter itself must first be precisely determined. Display device shown for the measured value of the

Der Erfindung liegt daher die Aufgabe zugrunde, eine Bohrungsdurchmessers versehen zu denken, diesen Nachteil vermeidende Vorrichtung zum Kali- Im Ausführungsbeispiel der erfindungsgemäßen Vor-The invention is therefore based on the object to think of a bore diameter provided, device for potash avoiding this disadvantage In the embodiment of the inventive

brieren einer Meßwert-Anzeigeeinrichtung für eine richtung sind an der Meßhülse 6 zwei diametrale ebene, Bohrungsmeßhülse der eingangs genannten Gattung zu 5 parallele Schliffe 21 vorgesehen, die von je einem der schaffen, welche fehlerfrei arbeitet, ohne deshalb einen beiden kolinearen radialen Taststifte 8 senkrecht durchbesonderen Aufwand zu erfordern, stoßen werden. In der Nähe jedes Taststiftes 8 ist derBring a measured value display device for one direction are on the measuring sleeve 6 two diametrical planes, Bohrungsmeßhülse of the type mentioned to 5 parallel cuts 21 provided, each of one of the create which works flawlessly without therefore specializing a two collinear radial stylus 8 perpendicularly To require effort to come across. In the vicinity of each stylus 8 is the

Diese Aufgabe ist mit einer Vorrichtung der eingangs zugeordnete Schliff 21 mit einer ein Innengewinde aufgenannten Art gelöst die sich darüber hinaus dadurch weisenden senkrechten Bohrung 22 der Hülse 6 versebesonders auszeichnet daß die hauptsächlich kreiszyfin- 10 hen, in welche zum Kalibrieren eine Kepfschraube drische Mantelfläche der Bohrungsmeßhülse zur AnIa- mit ihrem Gewindeabschnitt 24 eingreift deren gcränge der eben geformten Justierfläche des Justierteiles delter Kopf 25 einen größeren Durchmesser besitzt als einen ebenen Schliff aufweist welcher wenigstens unge- der Gewindeabschnitt 24 und an einem kreisscheibenfähr parallel zur Zylinderachse der Hülse und wenig- förmigen Plättchen 26 mit einer zentralen Bohrung stens ungefähr senkrecht zur Bewegungsrichtung 'des 15 angreift durch die der Gewindeabschnitt 24 der Schrauaus dem Schliff hervortretenden Tastkörpers verläuft be 23 gesteckt ist Infolgedessen liegt die dem SchliffWith a device, this task is the joint 21 assigned at the beginning with an internal thread Art solved the vertical bore 22 of the sleeve 6, which also points out, especially is characterized by the fact that the mainly circular cylinder 10, in which a head screw for calibration The outer surface of the bore measuring sleeve for anIa- with its threaded section 24 engages its gcränge the just-shaped adjustment surface of the adjustment delter head 25 has a larger diameter than has a flat cut which is at least un- the threaded section 24 and on a circular disk parallel to the cylinder axis of the sleeve and little shaped plate 26 with a central bore at least approximately perpendicular to the direction of movement 'of the 15 engages through which the threaded portion 24 of the screw the cut protruding probe body runs be 23 is inserted As a result, the cut is

Eine solche Vorrichtung macht die bisher verwende- zugewandte ebene Justierfläche 28 des Plättchens 26 am ten Referenzmaßverkörperungen wie Lehrringe ent- Schliff an, und zwar insbesondere im Bereich des Tastbehrlich und ist dabei doch wesentlich einfacher anzu- Stiftes 8, der die Justierfläche 28 im Punkt 9 berührt, fertigen als beispielsweise ein Meisterstück mit Sollboh- 20 welcher in der Ebene des Schliffes 21 liegt rung, da es auf das Einhalten eines Absolutmaßes über- Die Anbringung und Entfernung von PlättchenSuch a device makes the previously used flat adjustment surface 28 of the plate 26 am th reference measuring standards such as ring gauges, especially in the area of tactile gauges and it is much easier to pin 8, which touches the adjustment surface 28 at point 9, manufacture as, for example, a masterpiece with Sollboh- 20 which lies in the plane of the grinding 21 The attachment and removal of plates

haupt nicht ankommt welches seinerseits die Bezugnah- und Schraube 23 ist aus den linken Hälften der F i g. me auf eine andere Referenzmaßverkörperung erfor- und 7 ohne weiteres ersichtlich.does not matter at all which in turn is the reference and screw 23 from the left halves of FIG. me on a different reference material measure and 7 is readily apparent.

dcrt. Die erfindungsgemäße Vorrichtung stellt also ein dcrt. The device according to the invention is therefore set

einfaches Hilfsmittel dar, durch das der Anwender Inve- 25 Hierzu 1 Blatt Zeichnungena simple aid through which the user can invest 25 1 sheet of drawings

stitionskosten spart wenn er Anzeigeeinrichtungen wie saves on installation costs if he has display devices such as

Meßuhren, Feinzeiger, (elektrische) Meßtaster und (Digital-)Anzeigeeinrichtungen für Bohrungsmeßhülsen kalibrieren will. Dazu ist lediglich ein ebener Anschliff der Bohrungsmeßhülse vorzunehmen und diese mit einem beliebigen Justierteil zu versehen, das eine von Hause aus eben geformte Justierfläche aufweist.Dial gauges, dial indicators, (electrical) probes and (digital) display devices want to calibrate for bore measuring sleeves. For this purpose, the bore measuring sleeve has to be ground evenly and this with a to provide any adjustment part that has an adjustment surface that is flat from the start.

Mittels vorzugsweise gleicher Justierteile wird der Berührungspunkt jedes Bohrungs-Tastkörpers in die Mantelfläche der Bohrungsmeßhülse verlegt und dort so lange gehalten, bis die Anzeige der Meßwert-Anzeigeeinrichtung auf den durch den Schliff verminderten bekannten Hülsendurchmesser längs der Tastkörper-Bewegungseinrichtung als Meßwert eingestellt ist. Auf diese äußerst einfache Weise läßt sich die Anzeigeeinrichtung unter der leicht zu erfüllenden Bedingung kalibrieren, daß der verminderte Istdurchmesser der Meßhülse ein für alle Mal angegeben istBy means of preferably the same adjustment parts, the point of contact of each bore probe body is in the The outer surface of the bore measuring sleeve is laid and held there until the display of the measured value display device to the known sleeve diameter along the probe body movement device, which has been reduced by the cut is set as the measured value. In this extremely simple way, the display device calibrate under the easily fulfilled condition that the reduced actual diameter of the measuring sleeve is given once and for all

Bei einer bevorzugten Ausführungsform der erfindungsgemäßen Vorrichtung ist die Bohrungsmeßhülse mit einem Plättchen als Justierteil mit ebener Justierfläche versehen, welches lösbar an der Hülse gelagert ist; ist das durchbohrte Plättchen mittels einer im Bereich des Schliffes in die Bohrungsmeßhülse eingedrehten Schraube an dieser festlegbar und ist als Schraube eine Kopfschraube mit Kopfrändelung vorgesehen. Mittels Plättchen und Schraube ist es mühelos möglich, dessen justierfläche auch dann zur vollkommenen Anlage am Schliff der Hülse bringen, wenn der Schraubenkopf infolge schiefer Bohrung in Plättchen und Hülse (hier im Innengewinde) nicht ordnungsgemäß am Plättchen angreift. In a preferred embodiment of the device according to the invention, the bore measuring sleeve is provided with a plate as an adjustment part with a flat adjustment surface, which is releasably mounted on the sleeve; is the perforated plate by means of a screwed into the bore measuring sleeve in the area of the ground joint Screw can be fixed on this and is provided as a screw with a head screw with knurled head. Means Plate and screw, it is effortlessly possible to adjust its adjustment surface to make perfect contact with the Grind the sleeve if the screw head due to an oblique hole in the plate and sleeve (here in Internal thread) does not attack the plate properly.

Im folgenden ist die Erfindung anhand der durch die Zeichnung beispielhaft dargestellten bevorzugten Ausführungsform der erfindungsgemäßen Vorrichtung imIn the following the invention is based on the preferred embodiment shown by way of example in the drawing the device according to the invention in

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F i g. 1 und 2 eine Seitenansicht der Ausführungsform in Verbindung mit einer Bohrungs-Meßhülse bzw. eine Draufsicht darauf, je teilweise in Explosionsdarstellung.F i g. 1 and 2 show a side view of the embodiment in connection with a bore measuring sleeve and a Top view of it, each partly in an exploded view.

Diese Meßhülse 6 mit kreiszylindrischem Umfang 7 und zwei diametralen, radial verschiebbar gelagerten Taststiften 8, die an ihren radial äußeren sphärischen Enden Berührungspunkte 9 bilden, ist mit einer nichtThis measuring sleeve 6 with a circular cylindrical circumference 7 and two diametrically, radially displaceably mounted Styli 8, which form contact points 9 at their radially outer spherical ends, is not with one

Claims

1 2 where a probe when measuring from the lateral surface claims: emerges and hits the adjustment surface when calibrating

1. Device for calibrating a measured value from DE-OS 30 26 35 i is a device for -Display device for a bore measuring sleeve with 5 calibrations of a measured value display device for a an at least mainly circular cylindrical three-stage bore measuring sleeve known, which in each Stu jacket surface known diameter, with at least mainly two circular disks a diameter which can move radially against a restoring force and which can be moved along by means of an axial sleeve Probe bodies mounted in the sleeve wall are connected to one another, on the outside of which electrozur Touching the wall of a mechanical transducer to be measured; from two diametrical Bore of larger diameter, which is smaller than probe bodies, which are radially adjustable on the arms of the transducer Distance of the probe body contact point bar arranged in so-called ring-shaped plugs from the diametrical sleeve point or contact point, which are on the circumference of the smaller in diameter point of another, diametrical probe body, if discs are attached radially and precisely machined Au each Probe body contact point have its maximum 15 outer surfaces, the outer diameter of which is distance from the sleeve center has; with a bear ring is slightly smaller than the nominal diameter of the to worked. Outer surface of the sleeve for each probe body checking bore section; and from two am per, the direction of movement of which is attached at least around the circumference of the larger disk, semi-cylindrical provided perpendicular to the associated outer surface, coaxial shells which the transducers revolve; and wrap with a known adjusting part with 20 and sit on steps of the stopper. - The well-known Adjustment surface that encompasses the radially outer casing te calibration device only that of the surface of the sleeve can be placed where a probe body stopper located, precisely machined end faces protrudes from the outer surface when measuring and with an outer diameter that is a known one hits the adjustment surface during calibration, d a - has a value, so that the radial setting of the probe bevel characterized in that the main 25 per on the transducer arms with respect to the plug end face Circular cylindrical outer surface (7, 21) of the drilling surfaces either by means of a standard rule or a reference measuring sleeve (6) for the installation of the flat shaped pieces and / or with regard to the outer adjustment surface (28) of the adjusting part (26) a flat diameter of the stopper can be determined so that Ground joint (21) which (21) has at least no display device connected to the transducer drive parallel to the cylinder axis of the sleeve (6) and 30 as the measured value the known value, for example des at least approximately perpendicular to the direction of movement of the outer diameter of the plug. Thanks weltung of the probe protruding from the joint (21) for calibrating the known outer body (8) runs, the diameter of the stopper can be used

2. Apparatus according to claim 1, characterized thereby, remained open. When using standard drawings, that the Bohrungsmeßhülse (6) wrestle with a 35 or reference fittings results in any case Plate (26) as an adjustment part with a flat adjustment surface, a floating mounting of the bore measuring sleeve (28) is provided, which is detachable on the sleeve (6) with its probe bodies, so that an exact calibration is stored. is not possible, which requires that the measuring axis,

3. Apparatus according to claim 2, characterized before the bore axis should intersect perpendicularly, too shows that the pierced (27) plate (26) 40 is the axis of the Sllbohrung a ring gauge or one by means of one in the area of the joint (21) cuts vertically into the Boh masterpiece or with the Rungsmeßhülse (6) screwed screw (23) on the adjustment axis of devices with combined end of this is determinable. measurements and measuring jaws for the embodiment of a

4. Apparatus according to claim 3, characterized in that the characteristic measure coincides

draws that as a screw a head screw (23) 45 from DE-OS 30 29 484 is a device for with head knurling is provided. Calibrating a measured value display device for a

Bohrungsmeßhülse known, which is a

so-called pneumatic measuring mandrel with two diametrically arranged nozzles, through which air is discharged will blow, which is one from the distance between radial

The subject matter of the invention is a device for nozzle and bore wall dependent flow wi-calibration a measured value display device for one counteracts which is used to determine the Bohrungsmeßhülse is used with an at least mainly diameter of the bore. To the potash circle cylinder The known bore measuring sleeve is the known diameter of the circumferential surface sers, with at least one against a restoring force 55 of their nozzles with an axially displaceable pressure damming radial movably mounted in the sleeve wall ring provided that the two nozzles in a defined Ab-Tastkörper To touch the wall, a measuring stand can be set radially opposite one another. The nozzles send larger diameter bore that is smaller are at one end of the Bohrungsmeßhülse in each case arranged as the distance of the probe contact point hard metal plate, the outer sides of which from the diametrical sleeve point or point of contact 60 lie a precisely defined circle, so that they are a Another diametrical probe body, if each form a tactile mechanical measuring caliber, that with the pressure body contact point its maximum distance stauring cooperates, this vcrvom the nozzles Has sleeve center; with a machined outside closes and with its known inside diameter area of the sleeve for each probe whose movement represents a reference dimension.

direction of movement at least approximately perpendicular to the pulling 65 On the two known devices is subordinate Outer surface runs; and with an Hg per se that at least one circular cylindrical adjustment surface is known Adjustment part with an adjustment surface, which is used to calibrate the before, the shape of which is straight outer circumferential surface of the sleeve can be placed there, accuracy is not easy to achieve and their