SU1433510A1 - Method of rolling asymmetric angles - Google Patents

Abstract

The invention relates to rolling production and can be used in rolling asymmetric angular profiles. The purpose of the invention is to improve the rolling profile accuracy. Asymmetrical | 1st corner profiles are crawled in rough gauges, in a pre-finishing rib gauge and in a fine gauge. When rolling a rough profile with unfolded shelves in a rib caliber, support is provided from the deflection of a large flange by means of a caliber ridge on which it rests with its inner edge in the bend area. As a result of the rigid fixation of this shelf in the caliber, the possibility of a more accurate adjustment of the width of the shelves in this caliber, i.e. Profile rolling accuracy is improved. 10 il. i (L

Description

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The invention relates to rolling production and can be used in rolling asymmetric angular profiles. .

The aim of the invention is to improve the rolling profile accuracy,

FIG. 1 depicts a rough ja-j | tH6p of an angular profile with unfolded GEols; in fig. 2 - pre-rib gauge; in fig. 3 - finishing angle caliber; in fig. 4-7 - stages of deformation of the angular profile in the rib caliber in accordance with the proposed method; in fig. - an example of the implementation of the method for rolling an asymmetric angular profile (UxZx3 mm.

In the process of rolling an asymmetric H-profile in a rough gauge, a tackle is formed with unrolled fields 1 | 1 and 2 (Fig. 1). Then rolled up behind- jiaioT c. rib control caliber, C which (Fig. 2) made crests | and 4 in section 5 of the bend is large 2. Tackle in the rib caliber Compresses across the width of a large 2 and 4, G shelves and, according to the proposed ifo method, the ridges 3 and 4 of the rib caliber are in contact with the outer and inner sides of the large 4. shelves 2 and in section 5 of its bend. 1 (after checking the width of the shelves, the pre-; | new roll comes into the finishing frame (Fig. 3), where there is a halt; alignment and refinement of shelves 1 and 2 are used to obtain the final dimensions of the ifoTOBoro angular profile.

; The control width of the shelves is 1o as follows.

The original corner roll with unrolled shelves enters the rib control gauge, where at the first moment of time (FIG. 4) the ends 6 and 7 of jiFiOK 1 and 2 are in contact with the upper and lower strands of the edge gauge. At the points of contact between the ends of the b and 7 IS rolls, the force Q is applied, then, as the roll is advanced through the deformation zone, due to insufficient roll resistance to the edge: 9th, Q forces, flanges 1 and 2 of the roll, are bent between each other and the corner angle 8 decreases. Width of shelves. The 1 and 2 tackles are practically unchanged at the moment.

At the second moment of time (Fig. 5), as the creeks of the rib control caliber come closer, the outer sides 9 and 10 of the shelves 1 and 2 in the region of the top 8 of the roll contiguous with the upper and lower cages of the caliber. As a result, the force interaction of the metal with the rolls is redistributed as follows: the width of the small shelf 1 at the end 6 and on the side 9 are forces Q and P |, and the width of the large shelf 2 at the end 7 and on the side 10 are the forces Qj and RG. Under the action of the forces Q, and P, the plastic deformation of the small shelf 1 occurs, and its width is reduced, controlled. However, the effect of Q and P forces on a large shelf 2 y; e with a ratio of widths of large 2 and small 1 shelves more than 1.5 leads to a loss of stability of the large shelf 2 under the influence of Q and P forces, and as a result, shelf 2 instead of the width control additionally bends .

Further, if the deformation of the corner corner in the rib control caliber is carried out in accordance with a known method, then as the deformation zone continues to pass, additional bending of the large shelf will develop, which will lead to an arbitrary change in the width of the large 2 shelf and will not provide the required caliber profile rolling accuracy. In accordance with the proposed method, at the third time point (Fig. 6), the ridge 4 of the lower stream contacts the inner side of the large shelf 2 in the section 5 of its bend and at the contact point 1I and a force T appears, preventing the arbitrary bending of the shelf 2. Change The force interaction of the large shelf 2 with the bottom stream of rib caliber provides plastic deformation and control of the width of the large shelf 2.

At the exit from the deformation zone at the fourth moment of time (Fig. 7) the ridge 3 of the upper strand of the rib caliber comes into contact with the outer side of the large shelf 2 and simultaneously with the lower ridge 4 from the outer and inner sides they firmly support the big shelf 2 against bending and overlapping quality control of its width.

Thus, in accordance with the proposed method I, a qualitative control of the width of the shelves in the rib control caliber is ensured and the acHi.is eTo i "ibix angle profiles with a different ratio of the widths of the large and small shelves are highly accurate.

Example. In order to obtain an asymmetric angular profile, B x O x x 5 mm, in rough draft angular gauges, a tackle is formed (Fig. 8) with a shelf width of 63 and 32 mm, thickness

Claims (1)

The pre-roll bar is equal to 58.5 and 29.2 mm, and the thickness of the ends of the shelves is 5.6 mm. Then tackle enters the finishing caliber, (figure 10). The invention of the method of rolling asymmetric angular profiles, including the formation of asymmetric roughing gauges the ends of the shelves are 5.2 mm. In anticipation of the corner rolled with deployed With this fin rib gauge (Fig. 9), the tackle is crimped across the width of the shelves, and a large shelf is supported in its bend area with the upper and lower ridges of the control gauge. The gap between the supporting combs of the control gauge is chosen 0.5 mm greater than the thickness of the large shelf, and the configuration of the working surface of the rower corresponds to the configuration of the external and internal surfaces of the large shelf in the area of its bend. After checking the width of the shelves shelves, control of the widths of the large and small shelves in the pre-finishing rib caliber, during which the outer surfaces of the shelves are in contact with the walls of the caliber, rolling the profile with simultaneous dressing of the shelves in the finishing caliber, which is different in order to improve the accuracy of the rolling of the profile, in the final finishing the rib caliber is supported by a large shelf from deflection by means of a caliber ridge in contact with the inner surface of the shelf in the area of its bend. Shig.1 Shig.g FIG L FIG. 5 FIG. 6 FIG. 7 FIG. 9 Thebes, 10