PL97944B2 - - Google Patents
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- Publication number
- PL97944B2 PL97944B2 PL187943A PL18794376A PL97944B2 PL 97944 B2 PL97944 B2 PL 97944B2 PL 187943 A PL187943 A PL 187943A PL 18794376 A PL18794376 A PL 18794376A PL 97944 B2 PL97944 B2 PL 97944B2
- Authority
- PL
- Poland
- Prior art keywords
- holes
- elements
- hole
- strengthening
- variable loads
- Prior art date
Links
- 238000000034 method Methods 0.000 claims description 6
- 238000005728 strengthening Methods 0.000 claims description 3
- 238000009825 accumulation Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Description
Przedmiotem wynalazku jest sposób umacniania elementów plaskich z otworami narazonych na obciazenia zmienne. < Otwory w elementach plaskich poddanych w czasie pracy obciazeniom zmiennym czesto sa przyczyna oslabien prowadzacych do pekniec zmeczeniowych wskutek spietrzenia naprezen w rejonie otworu.Obecnie dla polepszenia wlasnosci zmeczeniowych takich elementów stosuje sie wewnetrzne nagniatanie lub rolkowanie otworów. Sposoby te prowadza do istotnej zmiany wymiarów wprowadzaja bledy geometrii otworów, ponadto moga byc stosowane wylacznie dla otworów okraglych. • Sposób umacniania elementów z otworami wedlug wynalazku polega na wywolaniu stanu naprezen ostepnych sciskajacych wokól otworu poprzez wykonywanie odpowiedniego odcisku plastycznego na zimno w rejonie karbów wywolanych otworami korzystnie zmieniaja rozklad naprezen eksploatacyjnych, co przyczy¬ nia sie do polepszenia wlasnosci zmeczeniowych elementów oslabionych otworami. Sposób jest prosty, szybki w uzyciu i nie zmienia wymiarów otworu umacnianego. Moze byc stosowane dla otworów o róznym ksztalcie, jak tez i do umacniania karbów w postaci wyciec bocznych. Wykorzystanie sposobu ilustruje rysunek. » Umacniany element plaski 1 sciskany jest sila P miedzy dwoma elementami dociskowymi 2 poprzez stempel 3 srodkowy w umacnianym otworze. Podkladka 4 w podstawie 5 umozliwiaja regulacje glebokosci odcisku plastycznego. ' PLThe subject of the invention is a method for strengthening flat elements with openings exposed to variable loads. <Holes in flat elements subjected to variable loads during operation often cause weaknesses leading to fatigue cracks due to the accumulation of stresses in the area of the opening. Currently, internal burnishing or rolling of the holes is used to improve the fatigue properties of such elements. These methods lead to a significant change in dimensions introduce errors in the geometry of the holes, moreover, they can be used only for round holes. The method of strengthening elements with holes according to the invention consists in inducing a state of final compressive stresses around the hole by making an appropriate cold plastic impression in the area of notches caused by holes, favorably changing the distribution of operational stresses, which contributes to improving the fatigue properties of elements weakened with holes. The method is simple, quick to use and does not change the dimensions of the hardened hole. It can be used for holes of various shapes as well as for reinforcing notches in the form of side cuts. The use of the method is illustrated in the drawing. »The force P to be strengthened 1 is pressed between the two pressure elements 2 through the center punch 3 in the hole to be reinforced. The washer 4 in the base 5 enables adjustment of the depth of the plastic impression. 'PL
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL18794376A PL97944B1 (en) | 1976-03-13 | 1976-03-13 | METHOD OF STRENGTHENING FLAT ELEMENTS WITH HOLES EXPOSED TO VARIABLE LOAD |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL18794376A PL97944B1 (en) | 1976-03-13 | 1976-03-13 | METHOD OF STRENGTHENING FLAT ELEMENTS WITH HOLES EXPOSED TO VARIABLE LOAD |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| PL97944B1 PL97944B1 (en) | 1978-03-30 |
| PL97944B2 true PL97944B2 (en) | 1978-03-31 |
Family
ID=19975977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PL18794376A PL97944B1 (en) | 1976-03-13 | 1976-03-13 | METHOD OF STRENGTHENING FLAT ELEMENTS WITH HOLES EXPOSED TO VARIABLE LOAD |
Country Status (1)
| Country | Link |
|---|---|
| PL (1) | PL97944B1 (en) |
-
1976
- 1976-03-13 PL PL18794376A patent/PL97944B1/en unknown
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