DE8005983U1 - Measuring device - Google Patents
Measuring deviceInfo
- Publication number
- DE8005983U1 DE8005983U1 DE8005983U DE8005983DU DE8005983U1 DE 8005983 U1 DE8005983 U1 DE 8005983U1 DE 8005983 U DE8005983 U DE 8005983U DE 8005983D U DE8005983D U DE 8005983DU DE 8005983 U1 DE8005983 U1 DE 8005983U1
- Authority
- DE
- Germany
- Prior art keywords
- scale
- measuring device
- rigid
- scale body
- measuring
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired
Links
- 238000005452 bending Methods 0.000 description 8
- 238000005259 measurement Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/347—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells using displacement encoding scales
- G01D5/34707—Scales; Discs, e.g. fixation, fabrication, compensation
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Description
DR. JOHANNES HEIDENHAIN GMBH 4. Närz 1980DR. JOHANNES HEIDENHAIN GMBH March 4, 1980
MeßeinrichtungMeasuring device
Die Erfindung bezieht sich auf Meßeinrichtungen nach dem Oberbegriff des Anspruches 1.The invention relates to measuring devices according to the Preamble of claim 1.
Derartige Meßeinrichtungen sind beispielsweise aus der US-PS 3 816 003 bekannt. Der biegesteife Maßstab ist dabei in einer Nut angeordnet und wird durch Andruckschrauben fixiert. Durch die. Schraubbefestigung treten dabei geringfügige Verbiegungen des Maßstabes auf, die durch Unebenheiten oder Verschmutzungen der Montageflächen hervorgerufen werden. Ist dabei die Meßteilung nicht in der neutralen Faser angeordnet, können die Verbiegungen zu Meßfehlern führen.Such measuring devices are known, for example, from US Pat. No. 3,816,003. The rigid scale is included arranged in a groove and is secured by pressure screws fixed. Through the. Screw fastening occur slight bending of the scale, which is caused by unevenness or soiling of the mounting surfaces. If the graduation is not in the neutral Arranged fiber, the deflections can lead to measurement errors.
Es ist Aufgabe der Erfindung, eine Maßstabbefestigungs— einrichtung zu finden, bei der diese Nachteile nicht auftreten und die die Meßfehler reduziert.It is the object of the invention to provide a scale attachment- to find a device in which these disadvantages do not occur and which reduces the measurement errors.
Erfindungsgemäß wird diese Aufgabe durch die im Kennzeichen des Anspruches 1 angegebenen Merkmale gelöst.According to the invention, this object is achieved by the features specified in the characterizing part of claim 1.
Weitere vorteilhafte Einzelheiten sind durch die Unter— ansprüche angegeben.Further advantageous details are given in the subclaims.
Die Vorteile der Erfindung sind beispielsweise geringe Biegebelastungen des Maßstabkörpers durch genau dosierte Andruckkräfte, ausreichende Befestigung des Maßstab— körpers, Unempfindlichkeit· gegenüber unebenen Montageflachen und resultierend aus der Summe dieser Vorteile eine erhöhte Meßgenauigkeit der Meßeinrichtung.The advantages of the invention are, for example, low bending loads on the scale body due to precisely metered amounts Pressure forces, adequate fastening of the scale, insensitivity to uneven mounting surfaces and as a result of the sum of these advantages, an increased measuring accuracy of the measuring device.
3 -3 -
In der Zeichnung soll anhand eines Ausführungsbeispiels die Erfindung noch näher erläutert werden.The invention is to be explained in more detail in the drawing using an exemplary embodiment.
An einem Trägerkörper 1, der von einem Schlitten oder Bett einer Werkzeug— oder Meßmaschine gebildet werden kann, ist ein biegesteifer Maßstabkörper 2 angeordnet. Der Maßstabkörper 2 trägt auf seiner dem Trägerkörper Λ abgewandten Oberfläche eine Meßteilung 3, die symmetrisch zur Längsachse des Maßstabkörpers 2 unmittelbar auf diesem aufgebracht ist. Die Längsseiten 2a des Maßstabkörpers weisen nutartige Ausnehmungen 4 auf, in denen klammer— artige Spannfedern 5 angreifen. Die Spannfedern 5 sind mit Schrauben 6 am Trägerkörper 1 befestigt. Die Kraft der Spannfedern 5 ist groß genug, um den Maßstabkörper auf dem Maschinenteil 1 festzuhalten, aber zu klein, um kurzwellige Verbiegungen des Maßstabkörpers 2 zu verursachen. Durch die Gestaltung der Spannfedern 5 läßt sich die Andruckkraft, die auf den Maßstabkörper 2 einwirkt, genau festlegen. Eine Befestigung mit unnachgiebigen Halteelementen wie beim Stand der Technik hat kurzwellige Verbiegungen des Haßstabkörpers zur Folge, da die Montageflächen in der Praxis nicht so eben gefertigt werden, daß eine absolut plane Auflage des Maß— stabkörpers gewährleistet ist. Für die Erhöhung der Meß— genauigkeit einer derartigen Meßeinrichtung ist es jedoch erforderlich, die tatsächliche Biegelinie eines durch Montage gekrümmten Maßstabkörpers möglichst frei von kleinen Biegeradien zu halten.A rigid scale body 2 is arranged on a carrier body 1, which can be formed by a slide or bed of a tool or measuring machine. The scale body 2 has on its surface facing away from the support body Λ a measuring graduation 3, which is applied symmetrically to the longitudinal axis of the scale body 2 directly on the latter. The longitudinal sides 2a of the scale body have groove-like recesses 4 in which clamp-like tension springs 5 engage. The tension springs 5 are fastened to the support body 1 with screws 6. The force of the tension springs 5 is large enough to hold the scale body on the machine part 1, but too small to cause short-wave bending of the scale body 2. Due to the design of the tension springs 5, the pressure force that acts on the scale body 2 can be precisely determined. Fastening with rigid retaining elements as in the prior art results in short-wave bending of the hate rod body, since in practice the mounting surfaces are not made so flat that an absolutely flat support of the scale body is guaranteed. In order to increase the measuring accuracy of such a measuring device, however, it is necessary to keep the actual bending line of a scale body which has been curved as a result of assembly as free of small bending radii as possible.
Fehler, die durch seitliche Verbiegung des Maßstabkörpers ί entstehen könnten, werden durch die symmetrische Lage der Meßteilung 3 zur Längsachse des Maßstabkörpers vermieden. Durch entsprechende Gestaltung ist die Biegesteifigkeit des Maßstabkörpers 2 in seitlicher RichtungErrors caused by lateral bending of the scale body ί could arise, are avoided by the symmetrical position of the measuring graduation 3 to the longitudinal axis of the scale body. By appropriate design, the rigidity of the scale body 2 is in the lateral direction
' : ■■ ι · ι ': ■■ ι · ι
ZiRoom
t tt t
etwa zehnmal größer als um die Querachse, dementsprechend ist die Empfindlichkeit gegen Verbiegung kleiner.about ten times larger than around the transverse axis, correspondingly less sensitivity to bending.
Die Meßeinrichtung kann rein optisch, oder aber auch lichtelektrisch betrieben werden.The measuring device can be operated purely optically or else photoelectrically.
Claims (2)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3008384 | 1980-03-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE8005983U1 true DE8005983U1 (en) | 1983-11-10 |
Family
ID=1326361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE8005983U Expired DE8005983U1 (en) | 1980-03-05 | Measuring device |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE8005983U1 (en) |
-
0
- DE DE8005983U patent/DE8005983U1/en not_active Expired
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