SU498997A1 - Centrevatel mandrel rod mill with axial issuance of pipes - Google Patents

Description

one

The invention relates to the field of pipe production, in particular to devices for intercepting a mandrel rod of a pipe rolling mill with axial dispensing of sleeves.

Known devices for intercepting the rod, installed directly in the mill stand. In order to place the rod intercept on the stand, it is necessary to place along the rolling axis, therefore, the first penetrator located at the stand must be moved away from the stand, i.e. the free length of the mandrel bar must be increased. In addition, the location of the interception rod on the stand makes it difficult to access the deformation zone.

Also known are devices for intercepting a mandrel rod of a tube mill with axial delivery of hollow articles, comprising a mobile centering device installed directly behind the cage. In this case, the interception rod is installed only in the cage. However, when working with intercepting the rod mounted directly in the cage, the distance between the rolling axis and the axis of the first centering device increases, which is necessary to accommodate the interception of the rod. This leads to an increase in the free length of the rod, to an increase in its deflection during the most crucial period of the unsteady rolling process and ultimately to a deterioration in the quality of the manufactured products, and the presence of the rod interception mounted in the stand, worsens access to the deformation center and makes it difficult to service the mill.

It is known a device of an mandrel sterling mill with an axial delivery of pipes, made in the form of a body that is forcibly moved in the axial direction with a steering wheel of the case, inside which the interceptions of the frame are mounted

rod, and on the end wall from the side of the mill are transporting rollers. This arrangement of non-trehvatov does not exclude the deflection of the rod due to its considerable free length and leads to a decrease in the quality of the sleeves, especially during the unsteady rolling process.

In order to reduce the deflection of the rod and thereby increase the quality of the rolled tubes in the proposed centering support lever hooks of the mandrel rod mounted on the end wall of the housing from the side of the mill.

FIG. 1 shows the proposed PENTROVATOR at the time of rolling; in fig. 2 - the same

at the time of replacement of the rulers or rolls or when setting up the mill.

The centering device comprises a housing 1 with an axial movement drive 2, rollers 3 transporting the sleeve, with a drive for mixing them 4

Claims (1)

and lever hooks of the mandrel bar, made in the form of two hingedly mounted on the end wall of the housing from the side of the mill, of gripping levers 5, interconnected by a synchronizing lever system connected to the drive 6 and consisting of two levers 7 and 8, connected by a link 9. Device works as follows. In the rolling process, as soon as the product passes the interception zone of the rod, the interception levers 5 grab the mandrel rod 10 and the product 11 is transported by the rollers 3 beyond the output side of the mill (see Fig. 1). When setting the deformation zone, changing the rulers or rolls, the body 1 of the drive 2 moves away from the working stand. Along with the case, the interceptings of the mandrel sterling are also moving, and freeing the center of deformation. Claim centering device of mandrel rod of mill with axial delivery of pipes, including case forcibly moving in axial direction, mounted on it axially transporting pipe rollers and lever hooks of mandrel rod, characterized in that in order to improve the quality of rolled pipes by reducing the deflection of the rod, support lever hooks mandrel rod mounted on the end wall of the housing from the mill. Literature. Catalog reference book “Equipment for pipe mills, p. 70.