FIELD: metallurgy.
SUBSTANCE: invention is intended for improving operational conditions of mandrel unit at screw rolling mill. Mandrel unit of screw rolling mill includes hollow rod with rod end and mandrel fixed to the rod. The mandrel is connected to the rod end by means of removable split terminal. The rod end is implemented as a hollow item. The outer surfaces of the rod end and mandrel are provided with circular grooves. The clamp is in the form of bushing with several lathes at each side of bushing end surfaces. The bushing itself is installed on the rod end, and reciprocal flanges are inside rod end and mandrel grooves. The reciprocal flanges are placed on the end parts of lathes. In addition, lathes are provided with screw holes for thrust screws. The circular grooves of the rod end and mandrel may be made tapered or cylindrical, respectively.
EFFECT: possibility of internal mandrel cooling, fast replacement in case of item deterioration combined with reliable mandrel fixing on rod and creation of favourable conditions for rough pipe and mandrel unit surfaces contacting during rolling.
2 cl, 1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| SCREW ROLLING MILL MANDREL ASSEMBLY | 2012 |
|
RU2497613C1 |
| SCREW ROLLING MILL MANDREL ASSEMBLY | 2011 |
|
RU2477186C2 |
| BUILT-UP MANDREL ROD TUBE ROLLING MILL | 0 |
|
SU858960A1 |
| TECHNOLOGICAL TOOLS OF CONTINUOUS MANDREL-ROLLING PIPE MILL | 0 |
|
SU1734901A1 |
| MANDREL FOR LONGITUDINAL ROLLING OF TUBES | 0 |
|
SU1022761A1 |
| APARATUS FOR CENTERING MANDREL ROD AND FOR CHANGING MANDREL OF VACUUM MILL FOR SCREW ROLLING OF TUBES | 2004 |
|
RU2266169C1 |
| MANDREL ASSEMBLY OF SCREW ROLLING MILL | 2017 |
|
RU2650218C1 |
| METHOD OF LONGITUDINAL ROLLING OF TUBES | 0 |
|
SU1022760A1 |
| REAR TABLE OF SCREW ROLLING MILL | 1999 |
|
RU2165810C2 |
| APPARATUS FOR MOUNTING ROLLING MILL MANDREL | 0 |
|
SU982831A1 |
