CS261902B1 - Method of rolling angles on continuous profiled rolling mills - Google Patents

Abstract

The method is based on rolling the billet into the shape of a universal flat-shaped tapping cross-section and then rolling it in a shaped profile angle gauge by bending. The method replaces a group of profile pre-gauges - by using flat rolling in one closed profile gauge.

Description

The invention also relates to the problem of rolling, in particular angles on continuous profiled rolling mills.

In the known known methods of rolling isosceles and non-isosceles angles with a sharp edge at the top of the arms in continuous equilibrium, it uses different calibration ♦

systems with a very large number of preparatory profile passes. A rectangular or rectangular wedge or upsetting oval is used as a puncture for the 1st profile angular passage. Profile angular passages are usually made as closed gauges. Even the finished passage is solved by a calibrated closed ·

The main disadvantage of closed profile angle gauges from the point of view of forming is that during rolling there is an easy overfilling of gauges and the formation of burrs, which roll in the other passages and the rollers are impermissible. A disadvantage of closed profile gauges is also that they can only be used in a given passage and only for one dimension of the angles. They are not universal. A further disadvantage is the large number of passages used and hence the rolling mill with corresponding drives, increased power consumption, rollers and rolling fittings, etc. in use and consumption. On high-speed continuous cylindrical ballasts, weights with masses over 1 t are used. With every erection, there is a great risk of injury, equipment damage and always means a loss of production time. Excessive number of throughputs and hence rolling rolls, especially if profile gauges must also be placed in the preparatory order / very negatively limit the rolling mill handling possibilities with the aim of operational planning of production of the whole rolling range. For rolling mills with two or more finishing orders next to each other, it is not possible to roll different assortments on each finished order.

261 902 removes the disadvantage of the rolling method according to the invention, which consists in that the pre-infusion is first fused into the shape of a universal cross section of a flat shape and then calibrated by bending into an angular shape.

The helmets are further rammed, then calibrated at least once into an open angle profile and finally a free-flow passage is made.

The advantage of the rolling method according to the invention is that the inlet cross section into the smooth rollers is a universal oval-shaped oval uniform for round ooel, ribbed steel, ooel flat, angles, hence for a wide range of profile rolling mills. for even-angled angles - or «proportional - for non-isosceles angles - filling both parts of the first profile angle gauge by bending a flat * cross section · This distribution is achieved with only one closed profile gauge ·

This inlet distribution of the metal into the individual arms is crucial for the further forming process and ensures reliable rolling of the angles within prescribed tolerances with a reliably added edge at the top of the arms ·

Another advantage is the fact that for the necessary deformation work ae uses the least inevitable number of profile passes and hence the roll-over stool ·

The uniform universal and conventional flat-faced flat-section cross section can be used for the o-rolled range of angles e by keeping the type of smooth cylinders the same.

The advantages of the rolling method according to the invention depend on the reduced number of profile angle calibers which are of the open type except for one caliber of the closed type.

261 902

The advantage of using open calibrators with free sulphurization is that the negative effects of the flashes are eliminated, both for individual passages and for the finished profile.

In addition, free-sulfur gauges offer versatile use for rolling other dimensional angles.

Another advantage is that in practical realization all necessary profile passages can be put in the finished order * The cross-section from the pre-order (eg * moving oval) can be used to roll different profile extrusions in individual finishing orders * This fact increases the planning flexibility production program *

The reduced number of throughputs translates into a reduced number of active rolling mills and proportionally reduces the probability of the rolling stock not penetrating into the rollers and discarding with the obvious operational consequences of downtime and loss of production time. This means a negative impact on the overweight * The risk of injury and damage to the production equipment is also great when discarding *

The rolling method according to the invention is illustrated by way of example in the accompanying drawing. * A, B and 1 to 5 show individual passages *

In Fig. * And the universal spihovovaol oval *

In Fig. * B it is a flat provalok / obtained by passing between two smooth cylinders *

FIG. 1 shows the first profile closed angle gauge, FIG. 2 and FIG. K show other free-profile profile angle gauges.

261 902

FIG. 3 shows a ram gauge.

Fig. 5 shows the caliber 8 by free sulfur.

The rolling method according to the invention is based on the fact that the universal strut cross-section of the flat shape is bent in the first profile angle gauge - FIG. Both parts of this gauge are filled in symmetrically or in a given ratio.

In the next profile gauge - fig * 2, bending by β free continues ·

In crushing caliber - fig.

In the subsequent profile gauge - Fig. 4, the provalok is further shaped by bending with free clarification ·

In the finished caliber - Fig. 5, the final shape of the angle with free sulfur is achieved.

Figures A, 1, 1 to 5 show the passages of the calibration series, where the actual lining is shown by hatching. It is a calibration series _made and tested for a specific rolled profile.

Fig. A shows a universal start up oval which is also suitable for other assortment of the rolling mill.

Fig. B shows a provalocation which was formed by passing a spike-shaped oval between a pair of smooth rolls, similar to the rolling of flat steel.

261 902

Giant. 1 represents a first profile angle gauge of closed shape. In it the universal flat bend is bent and the metal is placed in individual parts as needed ·

This distribution is crucial for the further forming of the forming, it is easy to control with the impact on the final rolled metal.

2 and 4 are two open profile gauges with free sulfur. They can be the same. Here, the formed metal no longer has to be limited in its propagation and is maintained in its proportions.

Giant. 3 represents a single enhancement caliber whose mission is to fix the length of the individual arms and shape the shape of their cones for the finished final passage.

The finished passage (shown in FIG. 5) is also with free propagation. Its main advantage is that there can be no overfilling and burr formation.

The resulting function of the method according to the invention is such that the universal displacement oval, FIG. A, is formed by a dual-biased smooth roll on a universal flat bumper, FIG. B, and this is formed by bending first a first angle gauge, FIG. 4, and once rammed, FIG. 3, and from the finished passage the final profile (also without limiting the propagation) comes out.

An advantage of the rolling method according to the invention is that, in practical application, it replaces a group of profile precalibres with smooth cylinders and one closed profile gauge and bending function.

The method according to the invention applies to the rolling of isosceles and non-isosceles angles, in particular on continuous as well as open mill rolling mills.

Claims (2)

SUBJECT OF THE INVENTION 1. A method of rolling angles on a continuous profile roll, characterized in that it is first rolled into a universal groove cross section of a flat shape and then calibrated by bending into an angular shape. Rolling method according to claim t-y, characterized in that the piercing is further packed, then at least once calibrated into an open angle profile, and finally a free-pass finishing passage is performed.