FIELD: metal working.
SUBSTANCE: invention relates to metal working and can be used to produce annular items with high shape precision, such as bearing rings. After the workpiece is upset, an annular forging is formed therefrom by hot forging in closed dies. Forming is executed in three passes, including upsetting, pre-forging, and final forging. The central hole is then pierced, and the forging is rolled out. The rolled forging undergoes the expansion of the inner diameter in the hot state on an expanding machine with numerical program control.
EFFECT: increase in the precision of shape of the annular items, increase in the strength of die tooling, and reduction in the consumption of cutting tools.
1 cl, 1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| BALL VALVE HALF-BODY AND PREPARATION METHOD THEREOF | 2014 |
|
RU2597852C2 |
| RING ARTICLE PRODUCTION METHOD | 0 |
|
SU912393A1 |
| METHOD FOR MANUFACTURING PROFILED RING PRODUCTS | 2015 |
|
RU2678823C1 |
| METHOD FOR MANUFACTURING LARGE-SIZED CIRCULAR PROFILE PRODUCTS FROM CORROSION-RESISTANT HEAT-RESISTANT STEEL | 2022 |
|
RU2792019C1 |
| METHOD OF MANUFACTURING RING-SHAPED ARTICLES | 0 |
|
SU1134269A1 |
| METHOD OF PRODUCING HOLLOW STEPPED PARTS | 2011 |
|
RU2486986C2 |
| RING MAKING METHOD | 0 |
|
SU1696070A1 |
| METHOD OF PRODUCING STEPPED HOLLOW FORGINGS | 2011 |
|
RU2475330C1 |
| METHOD AND STAMP FOR BALL VALVES LARGE-SIZED CUTTINGS MANUFACTURING | 2017 |
|
RU2648916C1 |
| METHOD OF FABRICATING ARMOR-PIERCING ROUND CORE | 2009 |
|
RU2398649C1 |
