CN102363155A - Vertical roll axis deviation type universal mill - Google Patents

Abstract

The invention provides a vertical roll axis deviation type universal mill, which comprises a vertical roll, two horizontal rolls, bearing seats, brackets and a vertical roll box, wherein the horizontal rolls are arranged on the mill through the bearing seats; the vertical roll is arranged between the upper and lower horizontal rolls; the vertical roll is arranged in the vertical roll box; the side face of the vertical roll box is provided with a lining plate; the vertical roll box slides in a guide plane which consists of the left and right brackets; the openness of the vertical roll is adjusted through a vertical roll press-down device; and the vertical roll and the horizontal rolls are arranged in the way that the axis of the vertical roll is deviated from those of the horizontal rolls, and the derivation distance is S. The universal mill has the beneficial effects that: reconstruction is performed on the basis of the original mill; the defects of high probability of producing fluctuation on a web plate, deviation of a central line of the web plate and large horizontal roll load can be overcome by deviating the axis of the vertical roll towards the outlet side of a milling line for a certain distance at lower cost; and the quality of a product is effectively improved and the service life of the mill is prolonged.

Description

Edger roll desaxe formula universal mill

Technical field

The present invention relates to short stress universal mill, especially relate to edger roll desaxe formula universal mill.

Background technology

Because H shaped steel has excellent mechanical property, on industrial building and civil buildings, obtained to use widely.H shaped steel has parallel shank, is convenient to machining and installation, not only elegant in appearance but also labor and material saving.H shaped steel is used in the architectural construction weight that can make and alleviates 30%, is used in ability weight reduction 15% on the bridge, all uses H shaped steel to replace original gradient I-steel in many countries.

Because H shaped steel excellent mechanical property and machining installation capability, domestic in recent years H shaped steel output enlarges year by year, and H shaped steel enterprise is on the increase, but following point in the process of rolling H shaped steel, often occurs:

1) wave appears in web easily;

2) web disalignment;

3) horizontal roller load increases.

These problems make the quality of product can not get guaranteeing, have also increased the consumption of electric power resource.

Summary of the invention

The objective of the invention is to overcome the deficiency of prior art, the short stress universal mill of a kind of axial line with edger roll to rolling line outlet side skew certain distance is provided.

Technical scheme of the present invention is: edger roll desaxe formula universal mill; Comprise edger roll, two horizontal roller, bearing block, support and edger roll casings, horizontal roller is installed on the milling train through bearing block, and edger roll is located between the upper and lower horizontal roller; Edger roll is installed in the edger roll casing; Liner plate is equipped with in edger roll casing side, said edger roll casing about slide in the guide surface that is configured to, through edger roll screwdown gear adjustment edger roll opening degree; Said edger roll axial line offset level roller axial line is installed, and its offset distance is S.

Further, edger roll contacts with web with the edge of a wing of H shaped steel rolled piece respectively with horizontal roller, and the floor projection LW's of the floor projection LF of the edge of a wing contact arc length that said offset distance S is edger roll and rolled piece and the web contact arc length of horizontal roller and rolled piece is poor.

Advantage and good effect that the present invention has are:

1) in the deformation of rolled wire district, the lengthening coefficient on the rolled piece web and the edge of a wing is tending towards evenly, and web wave can not occur;

When 2) rolled piece got into universal mill, web contacted with horizontal roller than the edge of a wing first (or simultaneously), and horizontal roller is nipped and can be driven rolled piece integral body behind the web and move up and down and align roll line, can not squint in the rolling web center of rolled piece afterwards;

3) in the rolling deformation district, metal flow is reasonable, helps spreading of the H shaped steel edge of a wing, also reduces the roll-force of horizontal roller simultaneously, and energy savings consumption effectively improves the quality of product and the service life of milling train.

Description of drawings

Fig. 1 is the main TV structure sketch map of universal mill of the present invention;

Fig. 2 is that cutaway view is looked on the left side of Fig. 1;

Fig. 3 is the partial enlarged drawing of Fig. 2;

Fig. 4 is that short stress universal mill horizontal roller axle center line of prior art and edger roll axial line are arranged in the rolling district distressed structure sketch map in the same vertical guide;

Fig. 5 is edger roll axial line of the present invention rolling district distressed structure sketch map when milling train outlet side skew S;

Fig. 6 is the structural representation of the speed of arbitrfary point, interior horizontal roller side, juxtaposition metamorphose of the present invention district (first contact zone);

Fig. 7 is the structural representation that the present invention has the speed of the arbitrfary point, horizontal roller side in second contact zone of horizontal amplification;

The structural representation in rolling deformation district when Fig. 8 is edger roll desaxe amount S of the present invention＞LF-LW.

Among the figure:

1, horizontal roller 2, edger roll 3, edger roll casing

4, rolled piece 5, bearing block 6, support

10, horizontal roller axle center line 20, edger roll axial line 31, edger roll casing side plate

32, the horizontal liner plate of edger roll casing 41, the edge of a wing 42, web

7, slit 8, juxtaposition metamorphose district 81, first contact zone

82, the second contact zone I, first depresses district II, second and depresses the district

III, the 3rd depresses the district

The specific embodiment

Like Fig. 1, Fig. 2, Fig. 3, shown in Figure 5, edger roll desaxe formula universal mill of the present invention comprises edger roll 2, two horizontal roller 1, bearing block 5, support 6 and edger roll casings 3; Horizontal roller 1 is installed on the milling train through bearing block 5; Edger roll 2 is located between the upper and lower horizontal roller 1, and edger roll 2 is installed in the edger roll casing 3, and liner plate is equipped with in edger roll casing 3 sides; Edger roll casing 3 slides in the guide surface that left and right sides support 6 constitutes; Through edger roll screwdown gear adjustment edger roll 2 opening degrees, edger roll axial line 20 offset level roller axial lines 10 are installed, and its offset distance is S.Edger roll 2 contacts with web 42 with the edge of a wing 41 of H shaped steel rolled piece 4 respectively with horizontal roller 1, and said offset distance S is floor projection LW poor of floor projection LF and web 42 contact arc lengths of horizontal roller 1 and rolled piece 4 of the edge of a wing 41 contact arc lengths of edger roll 2 and rolled piece 4.

Can know by Fig. 4 and Fig. 5; When the relative horizontal roller 1 in edger roll 2 axle center during to a certain amount of S of milling train outlet skew; The rolling deformation district is except that there being the edge of a wing 41 to have first to depress district I, the edge of a wing 41 and web 42 has second to depress the district II simultaneously separately; Having more an edge of a wing 41 again has the independent the 3rd to depress district III, and the edge of a wing 41 is divided into first contact zone 81 and second contact zone 82 again with the juxtaposition metamorphose district 8 of horizontal roller 2 sides simultaneously.

The influence that is produced before and after following surface analysis edger roll axial line 20 skews:

If LF is the floor projection of edger roll 2 and the edge of a wing 41 contact arc lengths; LW is the floor projection of horizontal roller 1 and web 42 contact arc lengths.

1, do not produce skew or skew is very little when edger roll axial line 20, i.e. edger roll desaxe is apart from S during much smaller than LF-LW, and is as shown in Figure 6:

1) on the edge of a wing 41 depress separately first depress the district I; Web 42 does not contact with horizontal roller 1, is in free state, when edger roll 2 is pressed to the edge of a wing 41; Can make the edge of a wing 41 metal flows to web 42 and 1 slit 7 of horizontal roller; Be that the edge of a wing 41 metals flow to web 42, this can slacken the edge of a wing 41 and spread, and increases horizontal roller 1 roll-force.

2) in the juxtaposition metamorphose district 8 that contacts with horizontal roller 1 on the edge of a wing 41 (first contact zone 81); The speed of any point can be decomposed into horizontal direction and vertical direction on horizontal roller 1 side; As shown in Figure 6, because of the velocity component of vertical direction is directed downwards, this also is unfavorable for spreading of the edge of a wing 41.

3) edge of a wing 41 first is depressed district I and has been accomplished the major part of drafts what edger roll 2 was depressed separately; Get into the edge of a wing 41 and web 42 have simultaneously depress second when depressing district II, the drafts of edger roll 2 is very little, the drafts of horizontal roller 1 is then bigger; So the lengthening coefficient of web 42 is greater than the lengthening coefficient on the edge of a wing 41; Web 42 pressurizeds so the wave defective appears in web 42 easily, cause waste product.

4) district I is at first depressed by edger roll 2 location first in the edge of a wing 41 of rolled piece 4, and when rolled piece 4 webs 42 center lines departed from horizontal roller axle center line 10, entering second was depressed and just can be produced finished product web 42 off-centring defectives after district II horizontal roller 1 is nipped, and causes waste product.

2, when edger roll axial line 20 to milling train outlet side skew S, and the edger roll desaxe is as shown in Figure 7 when approaching LF-LW apart from S (when this instance is preferably S=LF-LW):

1) edge of a wing 41 and web 42 position of nipping is approaching; It is little that the zone is depressed on the edge of a wing 41 separately, and then first to depress the slit 7 of 42 of horizontal roller 1 and webs in the district I very little, and it is very little at this moment to flow to the amount of metal of web 42 by the edge of a wing 41; Help spreading of the edge of a wing 41, also reduced horizontal roller 1 roll-force simultaneously.

2) edger roll axial line 20 is after the skew of milling train outlet side; The edge of a wing 41 is divided into first contact zone 81 and second contact zone 82 (as shown in Figure 5) with the contact zone of horizontal roller 1 side; In second contact zone 82; The vertical component direction of any some speed makes progress on horizontal roller 1 side, and this helps spreading of the edge of a wing 41.

3) edger roll axial line 20 is when milling train outlet side skew and S approach LF-LW; The edge of a wing 41 is approaching with the position of nipping of web 42, the edge of a wing 41 depress separately first to depress district I very little, second depress district II what horizontal roller 1 and edger roll 2 were depressed simultaneously; Edger roll 2 drafts are bigger; The lengthening coefficient on the web 42 and the edge of a wing 41 is tending towards evenly, and web 42 is drawn, so web 42 wave can not occur.

4) though district I is depressed first in rolled piece 4 edges of a wing 41 at first contacts earlier with edger roll 2; But first depress the district I very little; 2 pairs of edges of a wing 41 of edger roll along adding of edger roll axial line 20 directions hold effect of contraction very a little less than, even when H shaped steel rolled piece 4 webs 42 misalignment horizontal roller axle center lines 10, after horizontal roller 1 is nipped web 42, still can drive the edge of a wing 41 and move up and down; Make rolled piece 4 integral central lines align horizontal roller axle center line 10, so rolled piece 4 webs 42 centers are difficult for squinting.

5) when edger roll axial line 20 when milling train outlet side skew S approaches LF-LW; Though what the rolling deformation district had occurred that the edge of a wing 41 depresses separately the 3rd depresses district III; But it is minimum to depress the drafts of distinguishing the III edge of a wing 41 the 3rd; Flowing to the corresponding the 3rd by the edge of a wing 41, to depress the amount of metal in horizontal roller 1 and 42 slits 7 of web of district III also few, can not influence the net shape and the dimensional accuracy of rolled piece 4.

3, when the edger roll axial line to milling train outlet side skew S greater than LF-LW and when not destroying deformation mechanism, as shown in Figure 8:

This can produce following point:

1) first depresses district I and depress the district separately by the edge of a wing 41 and change web 42 into and depress the district separately; Second depresses district II diminishes; The 3rd depresses district III increases, and the edge of a wing 41 is inhomogeneous with web 42 lengthening coefficient of each several part in the deformed area, and the metal flow momentum that the web 42 and the edge of a wing are 41 is big; Friction consumed power between the metal increases, the rolling efficiency step-down.

What 2) depressed separately on the edge of a wing 41 the 3rd depresses district III and increases; Second contact zone 82 also increases thereupon, though the increase of second contact zone 82 helps spreading of the edge of a wing 41, the slit 7 of depressing 42 of district's III horizontal roller 1 and webs this moment the 3rd increases; The drafts on the edge of a wing 41 also increases; Therefore, the amount of metal that is flowed to web 42 by the edge of a wing 41 increases, and influences the net shape of rolled piece 4.

Analyze the offset distance S of edger roll axial line below to the milling train outlet side:

According to above analysis, confirm edger roll axial line 20 relative horizontal roller axle center lines 10 (being the milling train center line), to the offset distance S of milling train outlet side and rolling mill structure parameter and rolling schedule confidential relation is arranged; For reducing required power, improve bite condition and improve H shaped steel product quality, according to rolling mill structure parameter and rolling schedule; Should make edger roll 2 axle center to milling train outlet side skew S＜LF-LW, but hour DeGrain too should make S near LF-LW; Peak excursion is apart from S=LF-LW

Because, $\mathrm{LF}=\sqrt{(\mathrm{Dv}*\mathrm{\Δ\; t})};$ $\mathrm{Lw}=\sqrt{(\mathrm{Rh}*\mathrm{\Δ\; h})}$

So the edger roll maximum offset does $S=\sqrt{(\mathrm{Dv}*\mathrm{\Δ\; t})}-\sqrt{(\mathrm{Rh}*\mathrm{\Δ\; h})}.$

Dv: edger roll 2 roller diameters;

Δ t: the edge of a wing 41 drafts;

Rh: horizontal roller 1 roller radius;

Δ h: web 42 drafts.

When universal mill edger roll axial line 20 relative horizontal roller 1 when the milling train entrance side squints, the rolling meeting of H shaped steel rolled piece 4 draws and above-mentioned reverse effect.Therefore, edger roll axial line 20 only is suitable for doing irreversible tandem rolling unit and finisher with respect to horizontal roller 1 axle center to milling train outlet side off-set construction, is not suitable for doing reversable mill.

Concrete working method of the present invention; For realize edger roll axial line 20 with respect to horizontal roller center line 10 (being the milling train center line) to rolling out oral-lateral skew S; With making asymmetrical with the contacted slideway of edger roll casing 3 liner plates plane on the universal mill support 6; Be that the slideway symmetrical plane that left and right sides support 6 is formed squints S apart from (as shown in Figure 3 with respect to horizontal roller axle center line 10 to rolling out oral-lateral; The distance of left side brackets 6 vertical slideways line 10 to the horizontal roller axle center is L-S, and the distance of right side support 6 vertical slideways line 10 to the horizontal roller axle center is L+S) because edger roll casing 3 is the left-right symmetric structure; So after edger roll casing 3 was installed on the support 6, edger roll axial line 20 was just to rolling out oral-lateral skew S.

More than one embodiment of the present of invention are specified, but said content is merely preferred embodiment of the present invention, can not be considered to be used to limit practical range of the present invention.All equalizations of doing according to application range of the present invention change and improve etc., all should still belong within the patent covering scope of the present invention.

Claims (2)

1. edger roll desaxe formula universal mill; Comprise edger roll (2), two horizontal roller (1), bearing block (5), support (6) and edger roll casing (3), horizontal roller (1) is installed on the milling train through bearing block (5), and edger roll (2) is located between the upper and lower horizontal roller (1); Edger roll (2) is installed in the edger roll casing (3); Liner plate is equipped with in edger roll casing (3) side, and said edger roll casing (3) slides in the guide surface that left and right sides support (6) constitutes, through edger roll screwdown gear adjustment edger roll (2) opening degree; It is characterized in that: said edger roll axial line (20) offset level roller axial line (10) is installed, and its offset distance is S.

2. edger roll desaxe formula universal mill according to claim 1; It is characterized in that: edger roll (2) contacts with web (42) with the edge of a wing (41) of H shaped steel rolled piece (4) respectively with horizontal roller (1), and said offset distance S is floor projection LW poor of web (42) contact arc length of floor projection LF and horizontal roller (1) and rolled piece (4) of the edge of a wing (41) contact arc length of edger roll (2) and rolled piece (4).

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