SU1260059A1 - Method of straightening camber strip - Google Patents

Description

The invention relates to rolling production, in particular, to rolling and Christmas tree rolling in continuous action units, and can be used in the production of cold-formed rolled steel.

The purpose of the invention is the expansion of technological capabilities.

The straightened strip rotates the circle of its longer.-Edges before the correct machine (for example, with the help of pulling rollers on all modern profile aggregates), while simultaneously increasing the overlap of the rollers of the correct machine from the shorter edge of the strip to the required reduction or the disappearance of sickle after this machine, and the length of the twisting section of the strip E is proportional to the angle of rotation of the strip Cf and

, 7 + (0.92-1.25} Cf,

where is the length of the twisting section

polos, m; C is the twisting angle of the strip,

glad.

The proposed method is implemented as follows.

The tapping rollers (TP) of the roll forming unit, made with the possibility of rotation in the vertical plane (for twisting the strip) and moving along the strip movement direction (with fixing at the required distance from the sheet-correcting machine - LML), are set at the minimum distance from LPM, which is determined from the above empirical dependence as (f 0.

When passing through the TP and LPM aggregate of the crescent-shaped strip section, this pinosa is started to rotate around its longer edge (a waviness is observed visually on it), while simultaneously increasing the overlap of the LPM rollers by means of a pressure device from the side of the shorter strip edge. Since an increase in the overlap of the LPM rollers reduces the radius of the bend passing through the strip's strip, a one-sided increase in the overlap enhances the stretching (plastic stretching) effect of the short edge.

When the strip is twisted and at the same time increases the overlap of the LPM rollers, these rollers will slip (up to a full stop

lanes). Therefore, the TR is removed from the LMW, which reduces the resistance of the strip to the LML in the twisting section, then eliminating slippage and continuing movement of the strip through

TR and LPM with the required speed. If the band leaving the LPM has an unacceptable crescent, then all the operations are repeated in the described sequence until they are minimized or

elimination of sickle.

When a section of a strip with a crescent less than corrected, the distance between the ТР and ЛПМ (i.e. the length of section

twisting angle of twisting, as well as the value of one-sided overlap of the rollers is reduced, because otherwise, at the exit of the LML, you can get a sickle-shaped strip

opposite (than before editing) direction.

Experienced verification of the proposed method of editing sickle-shaped strip used as a blank

when forming varietal curved profiles, produced on profile-bending units 1-4 50-300 and 2-8 00-600.

For this purpose, straightening stripes with a thickness of 2-8 mm and a width of

In 60-550 mm of various grades of steel, o

Bands of the specified sizes (m, e, with the value of B: H 30-75) are not less than 95% of the assortment of the workpiece,

used for the production of varietal curved profiles. Installed on units 1-4x50-300 and 2-8 100 600 sheets. Correcting machines 9 100 (9-rollers) and 11150.680

(11-rollers are typical for profile-bending aggregates that produced varietal bent profiles. In the experiments, the overlap on one side of the LML was more: for 9-roller

CVL - by 0.5–2.5 mm, dp of 11-roller LPM by 0.5–4 mm.

The results of the experiments are given in the table.

The use of the invention will allow to expand the technological capabilities by providing quality straightening of strips with an initial crescent of up to 22 mm / 3 and.

Scp

(unit 1--4 50-300)

3X100 ZSP

(It4 50-300 unit)

t

09Г2

(unit 1-4 1-50-300)

0.915-1.25G, -1 ,, -1.5-1.7-S "2-3

0.92-1.15f, 1,4-PVf,. |, 8-2.0-5-2-3

68 / 1.1Ya 1.9-2.11-21-21-1.18, -1.8-PBG, -2.2 g2.5-5-3-5

Not fixed (S% 3)

10 34 / 0.59 1.25-1.45 0-1 12 50 / 0.87 1.5-1.70-2

15 17

13

sixteen

18 10 14 18 22

23 / 0.40 1.1-1.2 O 40 / 0.70 1.35-1.55 0-1

 60 / 1.05 1.7-1.95 1-2

1.0-1.25, 0-PV G, -1.3-1.6-5-2-4 0.93-1.22 g, -1.3-PB fj-1.6-1, 8-5-3-4

0.95-1.19 f, -J, f, -2.0-2.2-5-3-5

Not fixed (55 3)

16 / 0.28 1.0-1.05 P-1 1.07-1.25 ", -0.9-5-1, 1-1.3-5-2-4 24 / 0.42 1 , 1-1.2 1-2 0.95-1.19 R, -1.0-gt, 3-1.6-5-3-5 49 / 0.86 1.5-1.7 0- 2 0.93-1.16 e, -1.4-PB fj-1.8-2.0-5-4-6

Not fixed (524)

12 / 0.21 0.9-0.95 About 0.95-1.19, -0.8-5-1 f, -1.0-1.2-5-2-3 18 / 0.31 1.0-1.05 1-2 0.97-1.13 E, -0.9-S - I G, -1.1-1.3-5-3-5 28 / 0.49 1 , G5-1.25 0-1 0.92-1.12 1,1.1-PB, 3-1.6-5-3-4 46 / 0.80 1.45-1.65 1-2 0.94- 1.19 f, l, 4-ra5) (- 1.7-2.0-5-4-5

Not fixed (5 i 4)

7 / 0.15 0.850-11.0f, -0.8-5-1 f, -0.9-1.1-5-2-4

15 / 0.26 0.95-1.0 0-20.96-1.15 G, -0.9-5-2 f, -l, 1-1.3-5-5

30 / 0.52 1.2-1.30-1 0.96-1.15f, -l, l-5-I, 4-1.7-5-3- "

42 / 0.74, 4-1, b0-20.95-1.22, -1.3-PB, - 7-2.0-5-4-6

Not fixed. (5% W)

5 / 0.08 0.80-11.25f, -0.7-5-2 tj-0.9-1.0-5-2-3

12 / 0.21 1.0-1.05 O0.95-1.19R, -0.9-5-1, 1-1.3-5-2-3

 1.15-1.25 0-21.0-1.22f, -l, I-5-1 G, -1.3-1,

40 / 0.70 1.35-1.55 0-20.93-1.21f, "l, 3-ITB t, -l, 6-1.9-5-4-a

Not fixed (W 4)

. PV - SLM slippage. Pr.mvchavi; The coefficient K (6-column) is determined for the optimal experimental value of P. NS

 . the dependences,,. Not the fecal sickle was considered to be Sg 3-4 mm (for

. vveplery do not correspond to the highest quality category) with nvusty. LPM (jerks and short-term slippage of the strip), with some values of t t, the crescent form of the opposite was obtained ($ "- (1-2) by it).

1.0-1.25, 0-PV G, -1.3-1.6-5-2-4 0.93-1.22 g, -1.3-PB fj-1.6-1, 8-5-3-4

0.95-1.19 f, -J, f, -2.0-2.2-5-3-5

Claims (1)

METHOD FOR EDITING A SICKLE-BAND ^ STRIP mainly for forming high-quality bent profiles, including extending the shorter edge of the strip, characterized in that, in order to expand technological capabilities, the strip is additionally twisted around its longer edge in front of the correct machine, while the length of the twisting section is determined depending from the twist angle according to the formula £ = 0.7 + (0.92-1.25) ^, where P is the length of the strip twist section, m; 7 - angle of twisting of the strip, rad.