안녕하십니까? 창원에서 DIECASTING업체에서 설계일을 맡고 있는 이진호라고 합니다. 저번에 알루미늄합금 SAE383에 관해 질문을 올렸었는데 답변해 주신데 대해 매우 감사드립니다.
또 다시 재질에 관해 질문을 드리고자 합니다.
DIN 규격인 것 같은데 "MS 2.0401"이라는 재질이 어떤 재질인지 알고 싶습니다. 그리고 "DIN 7168"규격에 관해서도 설명을 부탁드리겠습니다.
감사합니다.

엔지니어 2002-05-07 16:49

이진호님의 글
------------------------------------
안녕하십니까? 창원에서 DIECASTING업체에서 설계일을 맡고 있는 이진호라고 합니다. 저번에 알루미늄합금 SAE383에 관해 질문을 올렸었는데 답변해 주신데 대해 매우 감사드립니다.
또 다시 재질에 관해 질문을 드리고자 합니다.
DIN 규격인 것 같은데 "MS 2.0401"이라는 재질이 어떤 재질인지 알고 싶습니다. 그리고 "DIN 7168"규격에 관해서도 설명을 부탁드리겠습니다.
감사합니다.

----------------- [답 변] -------------------

MS 2.0401은 MS 58로 불려지기도 하는것 같구요 Brass입니다.
상세한 것은 저도 모르겠네요.

그리고 DIN 7168은 형상 및 공차와 관련된 내용입니다.
아래의 내용은 인터넷이 있는 내용입니다.



According to DIN ISO 2768-1


General tolerances for linear measures and level squares with four tolerance classes are useful for simplifying drawings. By choosing the
tolerance class precision levels common in workshops should be taken into account.


If smaller tolerances are needed or bigger ones are more economical, then these tolerances are indicated next to the nominal size.


Tabular 1 Limits for linear measures


Tolerance-

class

Limits in mm for nominal sizes in mm

0,5 to 3

above
3 to 6

above    6 to 30

above   30 to 120

above 120 to 400

above 400
to 1000

above 1000
to 2000

above 2000
to 4000

f (fine)

?0,05

?0,05

?0,1

?0,15

?0,2

?0,3

?0,5

-

m (medium)

?0,1

?0,1

?0,2

?0,3

?0,5

?0,8

?1,2

?2

c (coarse)

?0,15

?0,2

?0,5

?0,8

?1,2

?2

?3

?4

v (very coarce grob)

-

?0,5

?1

?1,5

?2,5

?4

?6

?8


For nominal sizes below 0,5 mm the limit measures are to be indicated directly at the nominal measure.


Tabular 2 Limit measures for radius of curvature and chamfer height


Tolerance

class

Limits in mm for nominal sizes in mm

0,5

to 3

above 3

to 6

above 6

f (finne)

?0,2

?0,5

?1

m (medium)
c (coarse)

?0,4

?1

?2

v (very coarse)

Bei Nennmassen unter 0,5 mm sind die Grenzabmasse direkt am Nennmass anzugeben.


Tabelle 3 Grenzabmasse f? Winkelmasse


Tolerance class

Limits in mm for nominal sizes in mm

to 10

above 10

to 50

above 50

to 120

above 50

to 400

above 400

f (fine)

?1 ?/font>

?30 `

?20 `

?10 `

?5 `

m (medium)
c (coarse )

?1 ?30 `

?1 ?/font>

?30 `

?15 `

?10 `

v (very coarce)

?3 ?/font>

?2 ?/font>

?1 ?/font>

?30 `

?20 `


For nominal sizes below 0,5 mm the limit measures are to be indicated directly at the nominal measure.


If general tolerances according to ISO 2768-1 are valid, the following has to be inserted in the title box, i.e. for tolerance class
medium


ISO 2768 – m or general tolerance ISO 2768 – m


For new designs only the general tolerance according to DIN ISO 2768-1 should be valid. The limit measurements of the tolerance
classes m and f of DIN ISO 2768-1 are identic with those of DIN 7168-1.


 


General tolerances for form and position


according to DIN ISO 2768-2


DIN ISO 2768-2 is for simplifying drawing and fixes general tolerances in three tolerance classes for form and position. By choosing a special
tolerance class exactly the precision level common in workshops should be taken into
account.


If smaller tolerances are needed or bigger are more economical these tolerances should be mentioned directly according to ISO 1101.


General tolerances for form and position should be used while the tolerance principle according. to ISO 8015 is valid and while this is
mentioned in the drawing. This tolerance principles says that no opposite relation between
measure, form and position tolerance exists (principle of superposition).


Tolerance

class

General tolerances for straightness and evenness in mm

Range of specified size in mm

to 10

above 10

to 30

above 30

to 100

above 100

to 300

above 300

to 1000

above 1000

to 3000

H

0,02

0,05

0,1

0,2

0,3

0,4

K

0,05

0,1

0,2

0,4

0,6

0,8

L

0,1

0,2

0,4

0,8

1,2

1,6

Tolerance

class

General tolerances for straightness and evenness in mm

Range of specified size in mm

 

     

 

to 100

above 100

to 300

above 300

to 1000

above 1000

to 3000

H

0,2

0,3

0,4

0,5

K

0,4

0,6

0,8

1

L

0,6

1

1,5

2

Tolerance

class

General tolerances for symmetry

Range of specified size in mm

     

to 100

above 100

to 300

above 300

to 1000

above 1000

to 3000

H

0,5

K

0,6

0,8

1

L

0,6

1

1,5

2


General tolerances for form and position are valid for form elements for which form and position tolerances are not indicated individually. They are
applicable for all characteristics of the form elements accept cylinders, profiles of any
line or surfaces, inclines, coaxiality, position and total movement.



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