FIELD: metal forming.
SUBSTANCE: invention relates to metal forming and may be used in production of tool for piercing mill. When making the mandrel, the heated billet is upset and the outer profile of the mandrel is hot formed. After forming the outer profile, the inner cavity of the mandrel is pre-extruded. Cross-section of this cavity exceeds cross-section of finished cavity. Then, the inner cavity of the mandrel and open stamping of its rear conical section are finally formed by hot forming. Mandrel is made in a die containing positions of upsetting, hot forming of the outer profile of the mandrel, preliminary extrusion of the inner cavity, formation of the inner cavity by hot forming and open forming of the rear conical section of the mandrel.
EFFECT: increased durability of piercing tool and depth of pierced hole.
5 cl, 7 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR MANUFACTURING OF PIERCER PLUG | 2022 |
|
RU2791720C1 |
| METHOD FOR MANUFACTURING WATER-COOLED PIERCING MILL MANDREL IN FORM OF TWO-LAYER HOLLOW BODY AND STAMP FOR ITS IMPLEMENTATION | 2023 |
|
RU2804236C1 |
| WATER-COOLED MANDREL OF SKEW-ROLL PIERCING MILL, METHOD OF MAKING SAID MANDREL AND DIE TOOLING FOR MANUFACTURE THEREOF | 2023 |
|
RU2816967C1 |
| METHOD FOR RESTORING OUTER SURFACE OF PIERCING MILL MANDRELS AND STAMP FOR ITS IMPLEMENTATION | 2023 |
|
RU2806565C1 |
| PUNCHING METHOD OF WELDING NECK FLANGE FORGING | 2007 |
|
RU2352431C2 |
| BALL VALVE HALF-BODY AND PREPARATION METHOD THEREOF | 2014 |
|
RU2597852C2 |
| HOLLOW PRODUCT MANUFACTURING METHOD | 1988 |
|
SU1561331A1 |
| METHOD AND DEVICE FOR STAMPING BLINGS | 2021 |
|
RU2769333C1 |
| METHOD OF MAKING CONE GEAR WHEELS | 0 |
|
SU1729677A1 |
| METHOD OF PRODUCING MANDREL FOR BROACHING MILL | 0 |
|
SU904855A1 |
