RU81447U1 - WORK CART OF THE PLANETARY ROLLING MILL - Google Patents

Abstract

The utility model relates to the processing of metals by pressure and is intended for the production of long sections on planetary rolling mills. The objective of the described utility model is to create a working stand for a planetary rolling mill, which provides a sufficient amount of compression during rolling of billets in one pass. The working stand of the planetary rolling mill contains a drive, a housing in the form of blocks, in which four mutually perpendicular backup rolls are located, connected with separators, work rolls and bevel wheels. The housing is made in the form of four interchangeably rigidly interconnected blocks, with the possibility of connecting the drive to any conical wheel of the housing block.

Description

The utility model relates to the processing of metals by pressure and is intended for the production of long sections on planetary rolling mills.

Known planetary rolling mill (copyright certificate for the invention No. 118795, publ. 1959), including mutually perpendicular sets of rolls pairwise combined in the cases, of which the lower case, combining the lower horizontal and right vertical set of rolls, is stationary, and the upper, combining the upper horizontal and left vertical set of rolls, movable and connected to the lower case by a wedge device, which allows to change the distance between the crimped ones to change the size of the rolled metal mi pairs of rolls in the direction of the diagonal of the rolled section. A disadvantage of the known rolling mill is the need to roll the billet several times to obtain the desired compression ratio.

The objective of the described utility model is to create a working stand for the rolling mill, which provides a sufficient amount of compression during rolling of high-quality billets in one pass.

The problem is solved due to the fact that the working stand of the planetary rolling mill contains a drive, a housing in the form of blocks, in which four mutually perpendicular backup rolls are located, connected with separators, work rolls and bevel wheels. The housing is made in the form of four interchangeably rigidly interconnected blocks, with the possibility of connecting the drive to any conical wheel of the housing block.

The described working stand of the planetary rolling mill allows the rolling of high-quality billets in one pass due to the hard

fixing the housing, as well as ensure maintainability due to the execution of the housing from the same interchangeable blocks.

The essence of the described utility model is illustrated by the following drawings.

Figure 1 - diagram of the working position of the working stands of the planetary rolling mill;

Figure 2 is a General view of the working stands of the planetary rolling mill.

The working stand of the planetary rolling mill includes a housing (figure 1), made in the form of four rigidly interchangeable blocks 1.

In each of the four blocks of the housing 1, there is a support roll 2 and a separator 3, in which the work rolls 4 are fixed. The support roll 2 in each of the housings is mounted on a shaft 5, through which it interacts with bevel gears 6. A separator 3 in each of the housings is installed on the sleeve 7, through which it interacts with bevel gears 8. In this case, all four housing blocks are connected to each other through bevel gears 6 and 8 so that they form a closed kinematic system. The scheme is designed in such a way that the work rolls act on the workpiece one at a time - first with the upper pair of rolls, and then the lower one.

Figure 2 shows a possible layout of the working stand of the planetary rolling mill, in which the working stand is installed on the frame 9 and connected to the drive. The drive includes two motors 10 and 11. The motor 10 transmits rotational motion to the support rolls, and the motor 11 to the separators 3. All housing blocks are interchangeable, so each of the motors can be connected to any conical wheel of the housing block, which is especially convenient if difficulties arise when equipment layout in a limited space. In addition, maintainability of the working stand is ensured, which greatly facilitates its maintenance.

The working stand of the planetary rolling mill operates as follows.

When the drive is turned on, the bevel gears 6 and 8 are rotated, which transmit rotational motion through the shafts 5 and the bushings 7, respectively, to the support rolls 2 and the separators 3, the latter rotate the work rolls 4. The workpiece is fed into the working area (compression) between the work rolls , the compression of which is made alternately first by the upper pair of rolls, and then the lower one. Next, the workpiece goes to the next stages of processing, since its repeated compression is not required. This is achieved by using a closed kinematic scheme with a rigidly fixed housing, which eliminates the possibility of displacement of the rollers under the influence of the forces arising from the rolling of billets. As a result, it is possible to obtain the required amount of compression of high-quality blanks in one pass.

The described working stand of a planetary rolling mill in one pass allows to obtain a sufficient amount of compression during rolling of high-quality billets due to the rigid fastening of the housing. The execution of the housing from the same interchangeable blocks increases the maintainability of the working stand and provides the possibility of using various options for the layout of the equipment when connecting the drive to any bevel wheel of the housing block.

Claims (1)

A working stand of a planetary rolling mill containing a drive, a housing in the form of blocks in which four mutually perpendicular backup rolls are located, connected with separators, work rolls and bevel wheels, characterized in that the housing is made in the form of four interchangeable rigidly interconnected blocks with the possibility connecting the drive to the conical wheel of any housing unit.