Glossary entry (derived from question below)
German term or phrase:
Mittenrauhwert, Rauhtiefe
English translation:
average roughness (Ra) / mean roughness depth (Rz)
Added to glossary by
John Jory
Jul 9, 2008 10:19
15 yrs ago
6 viewers *
German term
Mittenrauhwert, Rauhtiefe
German to English
Tech/Engineering
Engineering (general)
Ernst says average peak-to-valley height.
But, then, what does Rauhtiefe mean....both have the same meaning in the dictionary....
The sentence goes....
Der Mittenrauhwert bzw. die gemittelte Rauhtiefe wurder nach DIN 4768 ermittelt.
is it average peak-to-valley height/ average surface depth????
Can you please help?
Thanks in advance.....
But, then, what does Rauhtiefe mean....both have the same meaning in the dictionary....
The sentence goes....
Der Mittenrauhwert bzw. die gemittelte Rauhtiefe wurder nach DIN 4768 ermittelt.
is it average peak-to-valley height/ average surface depth????
Can you please help?
Thanks in advance.....
Proposed translations
(English)
| 4 +2 | average/mean surface roughness, roughness depth |
John Jory
|
| 3 | average roughness, mean roughness |
Ken Cox
|
| 3 | arithmetical average, centre line average value |
Bernd Runge
|
Change log
Jul 23, 2008 05:47: John Jory Created KOG entry
Jul 23, 2008 05:49: John Jory changed "Edited KOG entry" from "<a href="/profile/37432">John Jory's</a> old entry - "Mittenrauhwert, Rauhtiefe"" to ""average roughness (Ra) / roughness depth (Rz)""
Jul 23, 2008 05:49: John Jory changed "Edited KOG entry" from "<a href="/profile/37432">John Jory's</a> old entry - "Mittenrauhwert, Rauhtiefe"" to ""average roughness (Ra) / (mean) roughness depth (Rz)""
Proposed translations
+2
8 mins
Selected
average/mean surface roughness, roughness depth
From experience. Plenty of refs.
Peer comment(s):
| agree |
Daniel Bird
: average roughness = Ra, mean roughness depth = Rz
4 hrs
|
| agree |
Erika Berrai-Flynn
: http://www.qualitymag.com/Articles/Departments/BNP_GUID_9-5-...
1 day 5 hrs
|
|
Thanks for the link :-)
|
4 KudoZ points awarded for this answer.
Comment: "Selected automatically based on peer agreement."
16 mins
German term (edited):
Mittenrauhwert, gemittelte Rauhtiefe
average roughness, mean roughness
Two slightly different ways of measuring surface roughness.
See e.g.
In North America, the most common parameter for surface texture is Average Roughness (Ra). Ra is calculated by an algorithm that measures the average length between the peaks and valleys and the deviation from the mean line on the entire surface within the sampling length. Ra averages all peaks and valleys of the roughness profile and then neutralizes the few outlying points so that the extreme points have no significant impact on the final results. It's a simple and effective method for monitoring surface texture and ensuring consistency in measurement of multiple surfaces.
In Europe, the more common parameter for roughness is Mean Roughness depth (Rz). Rz is calculated by measuring the vertical distance from the highest peak to the lowest valley within five sampling lengths, then averaging these distances. Rz averages only the five highest peaks and the five deepest valleys—therefore extremes have a much greater influence on the final value. Over the years the method of calculating Rz has changed, but the symbol Rz has not. As a result, there are three different Rz calculations still in use, and it is very important to know which calculation is being defined before making the measurement.
http://www.mmsonline.com/articles/1102gage.html
Oberflächengüte
Die Oberflächengüte ist ein Ausdruck für die Rauhtiefe in der Oberflächenprüfung, üblicherweise im Zusammenhang mit einem Fertigungsverfahren. Gängige Angaben der Rauhtiefe sind:
* Ra Mittenrauhwert (Arithmetisches Mittel der Abweichungen von der Mittellinie) in μm
* Rz Gemittelte Rauhtiefe (Mittelwert aus den gemessenen Rauhtiefen) in μm
http://de.wikipedia.org/wiki/Oberflächengüte
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Note added at 17 mins (2008-07-09 10:37:28 GMT)
--------------------------------------------------
make that "mean roughness depth"
See e.g.
In North America, the most common parameter for surface texture is Average Roughness (Ra). Ra is calculated by an algorithm that measures the average length between the peaks and valleys and the deviation from the mean line on the entire surface within the sampling length. Ra averages all peaks and valleys of the roughness profile and then neutralizes the few outlying points so that the extreme points have no significant impact on the final results. It's a simple and effective method for monitoring surface texture and ensuring consistency in measurement of multiple surfaces.
In Europe, the more common parameter for roughness is Mean Roughness depth (Rz). Rz is calculated by measuring the vertical distance from the highest peak to the lowest valley within five sampling lengths, then averaging these distances. Rz averages only the five highest peaks and the five deepest valleys—therefore extremes have a much greater influence on the final value. Over the years the method of calculating Rz has changed, but the symbol Rz has not. As a result, there are three different Rz calculations still in use, and it is very important to know which calculation is being defined before making the measurement.
http://www.mmsonline.com/articles/1102gage.html
Oberflächengüte
Die Oberflächengüte ist ein Ausdruck für die Rauhtiefe in der Oberflächenprüfung, üblicherweise im Zusammenhang mit einem Fertigungsverfahren. Gängige Angaben der Rauhtiefe sind:
* Ra Mittenrauhwert (Arithmetisches Mittel der Abweichungen von der Mittellinie) in μm
* Rz Gemittelte Rauhtiefe (Mittelwert aus den gemessenen Rauhtiefen) in μm
http://de.wikipedia.org/wiki/Oberflächengüte
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Note added at 17 mins (2008-07-09 10:37:28 GMT)
--------------------------------------------------
make that "mean roughness depth"
11 mins
Bernd Runge
Germany
Germany
Native in German
Works in field
Germany
Specialized in Technology & Engineering
Native in: German (Variant: Germany) 
Works in: English to German, German to English
Related KudoZ points
:
421
arithmetical average, centre line average value
Rauhtiefe
bezeichnet die gemittelte Rauhtiefe und wird aus dem Mittelwert einer definierten Summe aufeinander folgender Einzelmesswerte ermittelt.
Rauwert
bezeichnet als Mittenrauhwert und ist der arithmetische Mittelwert aller Abweichungen nach oben und unten des Rauheitsprofiles von einer definierten Bezugslinie (Mittellinie) innerhalb der festgelegten Messstrecke.
Hätte ich nicht besser erklären können ;-)
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Note added at 52 Min. (2008-07-09 11:12:46 GMT)
--------------------------------------------------
@ Anita: If you want to stick to Ernst, yes.
bezeichnet die gemittelte Rauhtiefe und wird aus dem Mittelwert einer definierten Summe aufeinander folgender Einzelmesswerte ermittelt.
Rauwert
bezeichnet als Mittenrauhwert und ist der arithmetische Mittelwert aller Abweichungen nach oben und unten des Rauheitsprofiles von einer definierten Bezugslinie (Mittellinie) innerhalb der festgelegten Messstrecke.
Hätte ich nicht besser erklären können ;-)
--------------------------------------------------
Note added at 52 Min. (2008-07-09 11:12:46 GMT)
--------------------------------------------------
@ Anita: If you want to stick to Ernst, yes.
Note from asker:
| beautiful reference.. can I say then: Mittenrauhwert as center line average height, and Rauhtiefe as peak-to-valley height??? |
Discussion
Thanks.....