SU603443A1 - Guiding tool of helical rolling mill - Google Patents

Description

productivity increase in equipment downtime.

A guide tool for a helical rolling mill is known in the form of a guide bottom with a grooved working surface 5 21. This guide tool reduces the friction force in the axial direction and allows rolling with an ovalization factor of close to 1.0 in a cross section. However, to provide such a ratio of ovalizadia throughout the entire deformation site, it is necessary to use large IX disks (for active camps, the required disk diameter is 1.5-2.0 m). FIosToQiy implementation of such a guide tool is extremely difficult. In addition, in the tangential direction, the friction on the contact surface of the metal with the disk remains sliding friction.

The closest to the invention of the technical essence of the technical essence is the guide tool of the helical rolling mill, which includes a single barrel-shaped roller and a profiled, grooved working surface adjacent to its end, the line 25, the line of the bottom of which the forming roller smoothly mate.

The disadvantage of Gizvestkotehnicheskogo re; Chile is that oyo does not provide the i1X) process of i rolling during periods 30 of metal capture and release.

The purpose of the invention is to stabilize the process during an unsteady rolling period.

This is achieved by the fact that the table guide tool, which includes the blank. The barrel-15 coviform roller and the profiled, with a grooved working surface adjacent to its end, the ruler, whose bottom line and the forming roller smoothly mated, is equipped with an additional idle barrel-shaped 40 roller located on the other side of the ruler.

The ruler is made in the form of a sector with a bottom line of the groove located along an arc, the axis of which is perpendicular to the plane of location 45 of the axes of the rollers.

The length of the sector arc is equal to the length of the barrel of the work roll, and the length of the roller barrel is 1, 5 of its length.

On -fig. 1 shows the ftpK guide tool gripping the workpiece; in fig. 2 the same, when the process is established.

The guide tool includes a guide sector 1 with a length equal to the length of the barrel of the working shaft 2, shaped roll-shaped rollers 3 of length 1, O-1.5 of the length of the roll barrel, which are installed at the pee- the middle and rear end of the sector on the axis x 4J

located in the plane of rotation s

jMDpa. The forming rollers are a continuation of the arc of a sector along the bottom of its groove.

The rolling process with the proposed guide: the tool is carried out as follows.

The heated billet is captured by the work rolls 2 and, making a rotational and translational motion, comes into contact with the rolling guide tool sector 1, which rotates along the rolling path, rotates face 3, which rotates around the axis 4 located in the plane passing through the rolling axis, and moves in the axial direction when the sector is rotated around an axis 5 lying in a plane perpendicular to the rolling axis.

The presence of such a guiding tool significantly reduces the drag of the workpiece, as. axially and tangentially,

which provides stable capture conditions.

When the rear end of the workpiece enters the bench, the guide tool receives a war-. The ability to rotate and retract from the mandrel occurs on the rolling guide tool, as in the gripping process, which contributes to the improvement of the conditions of the end of the process. After rolling the workpiece, the tool returns to its original position.

The length of the rollers installed at the front and rear end of the sector; must correspond to the path of movement of the end of the workpiece (liner) in an unspecified period. Consequently, the length of the roller installed at the front end must be not less than the length of the deformation zone (or the length of the roll barrel), and the length of the roller at the rear end must not be less than the length of the deformation zone multiplied by the average stretch (or 1.5 times the length of the roll barrel) .

Thus, the application of the proposed two-shaft technological tool for the screw proc: it will allow to stabilize the process of deformation at an ovalization ratio of 1 to 1.0, to improve the conditions of capture and end of the process, to reduce the number of scrap and the expense of the technopole tool by preventing sunset increase productivity of the piercing mill, ha, by reducing downtime.

Claims (3)

Invention Formula 1, Nkstrumekt helical rolling mill, including an open barrel (m and adjacent to its end a profiled, with a grooved working surface, a ruler whose bottom line i formed a roller smoothly, matched, characterized in that, in order to stabilize the process during the unsteady rolling period, it is equipped with an additional idle barrel-shaped roller located on the other side of the ruler. 2. The tool according to claim 1, in which the ruler is implemented as a sector with a bottom line of the groove located along the Meadow, the axis of which is perpendicular to the axis of the rollers. 3. Tool pop. 1 and 2, that is, the length of the arc of the sector is equal to the length of the barrel of the work roll, and the length of the barrel of the roller is 1, O-1.5 of its length Sources of information taken into account in the examination: 1. Danilov F. L. Gleyberg A. 3., Balakin V. G. Mountain rolling and pressing tubes. M ,, Metallurgists, 1972, p. 228. 2. USSR author's certificate No. 428798, cl. B 21 B 19/04,1972. 3. USSR author's certificate number 365179, cl. B 21 B 19/00, 1971.