FIELD: metallurgy.
SUBSTANCE: piercer for tube blank compression consists of a container, die with a retaining mandrel, an extrusion ram with a movable piercing mandrel concentrically and axially located with a gap therein and containing a removable tip. There is a washer with an axial bore on the front side of the extrusion ram. Its end surface is designed with a frustum-of-a-cone hole expanding towards the blank. The radius of the smaller base of the cone is greater than the radius of the washer bore.
EFFECT: reduced tube compressing force and metal consumption ratio.
2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| TOOL FOR PREPRESS BROACHING OF BLANKS | 0 |
|
SU1037991A1 |
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| METHOD FOR EXTRUDING SHORT-LENGTH TUBES | 2001 |
|
RU2208490C2 |
| METHOD FOR PIERCING BLANK AND APPARATUS FOR PERFORMING THE SAME | 1997 |
|
RU2119396C1 |
