JPS60102225A - Strong draft type leveler for plate - Google Patents

Abstract

PURPOSE:To adjust the state of supply of a plate material in entrance side and to display correcting effect sufficiently by making at least two or more rollers out of a group of rollers for correction movable back and forth. CONSTITUTION:An upper first roller 11A and an upper second roller 12A are made movable vertically. For instance, the rolling reduction of the upper first roller 11A is set to near 0, and the upper second roller 12A is set to below limit value of biting. A plate material 10 is bent strongly by making an upper third roller 13A and an upper fourth roller 14A for parallel strong draft. Thus, even when the upper third roller 13A is screwed down strongly, thrusting force to the upper third roller 13A becomes strong thrusting force, and sufficient biting of the plate material 10 is attained.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention is a temporary phase strong reduction method in which the temporary phase is turned around and bent by rollers of multiple α arranged in a staggered manner, and the shape of the plate material is flattened. The present invention relates to a type leveler, and in particular, to a type leveler for use with strong pressure 11 for plates that aims to improve the straightening effect on thin and materials.

[Background of the invention]

Conventionally, in this Yuzu leveler, for example, Patent No. 1117
As seen in No. 699, among the upper rollers, about two parallel strong pressure rollers are completely submerged in the center, and the 10th roller at the back of the upper roller group is made to be able to move up and down, so that the entire plate material can be subjected to the parallel pressure. A parallel pressure leveler is known in which the lower part is strongly engaged. According to this device, biting into the parallel pressure part is assisted by the first roller capable of dissection, so the temporary phase can be bent more strongly than the conventional tilt type leveler, and the temporary phase can be bent more strongly than the conventional tilt type leveler. It has become possible to significantly improve the accuracy of the embedding shape.

However, even if such conventional rollers are effective for relatively thick plates, when straightening thin plates, it is necessary to sufficiently improve the shape accuracy. 25, and often produces defective products.

! This is particularly noticeable when repeated processing is performed using one machine.

The results of examining these problems will be described below.

The leveler under consideration is one for general use, and its specifications are as follows.

The working rollers were set to have a total straight weight of 25 meters, a length of 5500 meters, a roller pitch of 265 meters, and a plate thickness of the material to be straightened ranging from 6 ran to 4000 meters, respectively.

In such a leveler, in order to completely correct the shape defects of the plate material, the bending process of the plate material at the strong reduction roller part is required.
It is necessary to give Kw or less.

That is, as shown in FIG. 1, the degree of processing λ of the curve of the plate material 2 as a material to be straightened by the strong pressing roller 1 can be expressed by the following equation.

λ-εb/ε, l1-river...il+where, εh is the bending strain on the plate surface, and ε is the yield strain. In addition, when the plate thickness is h, since i h = b / 2ρ, the thinner the plate thickness, the smaller the bending half-frame ρ of the plate material. That is, it is necessary to increase the downstream amount of the roller. Therefore, the yield strain ε is 1. If the yield stress σ1 of the plate material and the longitudinal delinquency coefficient E are given, it can be expressed by the following equation.

ε,=σ,/E・・・・・・・・・・・・・・・・・・
-(2) That is, the bending degree λ means that the plate material is bent by λ times the yield strain. This λ is 6+l, which is a thin plate.
In order to straighten a board material with a bad shape of about t++1 to 10 m, it is necessary to make λ>8 or more based on experience. As a means for this purpose, for example, as shown in Fig. 2, a trap may be used to release the pressure of the entry side extender (No. 10-ra) IA, so that the plate material 2 can be easily caught in the 20-th-ra IB. I will make it happen. However, λ
In order to apply a bend of 8 or more with the 20th line IB, the reduction of the 20th line IB must be increased to 14 or more.

For this reason, the contact angle θ between the plate material 2 and the 20th line IB becomes a dog, making it extremely difficult for the plate material 2 to bite into the 20th line IB.

Here, pseudophase 2 bites into gfs20-la IB!
First, when the plate material 2 comes into contact with the 20th roller IB, the relationship between the forces generated on each roller IA, IB, and IC is shown in FIG. Reduction M'feδ of board 2 by la IB, board 2 fr tf!
2 Assuming that the force applied to the roller IB is k F 1 , the following equation is derived from the fact that each mouth is encouraged by ~.

l! 11=μρ, 1 cosθ10μ(Pi+P21 ・
・・・・・・・・・・・・・・・(X() On the other hand, board 4i,
The generated force F2 that prevents l2 from being caught in the chest 20-la IB is expressed by the following equation.

F, +=PNsinθ ・・・・・・・・・・・・・・・
・(4) Therefore, in order for the plate (,1' 2 to bite into the 20th la IB, F>>F2 Therefore, μPN+μ(Pt + P2) >PN sinθ・
・・・・・・・・・・・・・・・(5) needs to be added by nk).

On the other hand, the relational expression between force and moment is as follows.

p3 = PNcosθ+μL'N5inθ=PN (C
Osa tenμsinθ) ・・・・・・・・・・・・・・・
・(6)F2 +Ps=F2・・・・・・・・・
・・・・・・・・・(7) Pltl=L2 Ps ・・・・
・・・・・・・・・・・・(8) That is, (61, +7i,
By substituting the +8i formula into the formula (5), the following formula is obtained.

In this equation (9), normally Lrki2t2, so
μ+2μ(1+μtanθ)): anθ ・・・・・・
・・・・・・・・・(IO+this(lG1 formula,
Since μtanθ, the second term on the left side, is small compared to 1, the following equation can be obtained by ignoring this term.

3μ) tanθ...dan...kawa...(ill, because the 10th-La IA is lowered by 14, the leveler bite of the conventional tilt type system is relatively soft 2μ':> tanθ Therefore, it has an IJ absorption capacity of 3.

FIG. 3 shows the relationship between the reduction fJ2'' in FIG.
It can be seen that θ and bending degree λ increase.

In order to straighten the V-68 plate (:3), it is necessary to set the bending degree λ to λ□=8, and the rolling reduction ↓4 in this case is 8m""14.6rMI.

On the other hand, since the friction coefficient μ between the plate material and the roller is μ=0.15, the limit of biting between the scraper and the roller is tanθ=0.15×3=0.45 from the above equation 0υ. In this case, the permissible rolling amount δ0 is 11.2 mm according to FIG. 3, and it is understood that correction of λ>8 or more is not possible, and it is difficult to sufficiently correct the shape of the board.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and its purpose is to make it possible to forcefully insert one tooth into the under-pressure eye-R portion of the plate material, thereby realizing hard-pressure bending processing. ,
! To provide a leveler with a strong pressure reduction type that can sufficiently obtain a straightening effect on thin plate materials.

[Summary of the invention]

First, the present invention will be explained in detail.

In the tentative strong reduction type roller according to the present invention, the reduction amount of the valley biting is limited to δ0 or less as shown in FIG. 20-R of FIG. I try to do that.

That is, as shown in FIG. 4, at least the upper 10-la IIA, upper v, 20-la]-2At- can be raised and lowered. For example, the reduction amount δ of the upper 10th la IIA is set near 0, and the lowering amount δ of the upper 20th la 12A is set below the bite limit value shown in FIG. 3. And the upper 30th la 13A and the upper 40th la 14A'! f Plate for parallel strong pressure, 111
Make sure to bend 0 strongly.

With such a configuration, even if the upper 30th roller 13A is pressed down strongly, the pushing force F, / to the upper in-a roller 13A will be expressed by the following relational expression for the above equation (3). Based on this, a strong pushing force is generated, and the plate material IO can be sufficiently bitten.

pl/-μpri (a) Sθ+μ(Ps +P24-P
3 + P4) Using this relationship, IIIJ (・Incretion limit formula U formula becomes as shown below.

7μ) tanθ ・・・・・・・・・・・・・・・a
zHere, since μ=0.15, the O2 equation is 1.05
) ta mouth θ・・・・・・・・・・・・O3), it is possible to bend more than 228 in Fig. 3, and it can be used not only for plate materials with a plate thickness of 6 mrn, but also for thin plate materials with a thickness of 6 mrn or less. It is also possible to reduce plate materials that require even stronger reduction.
It is possible to sufficiently correct the shape defects of the plate material.

In the β1144 diagram, upper 50th-ra 15A and upper 60th
- La 16A, upper 10th La 11A and upper 20th La 1
If the configuration is such that it can be moved up and down in the same way as 2A, even when performing forward and reverse passes, the shape can be corrected by rolling down in both directions.

That is, the correction operation is normally performed in the direction indicated by the arrow in FIG. In this case, if the shape of the plate material 10 is extremely bad, arrow A
A sufficient correction effect may not be obtained with only one pass in the direction. In such a case, if the upper 50th-ra 15A and the upper 60th-ra 16A'e can be raised and lowered, the plate #l 10
'fc arrow When performing a correction operation by performing a reverse pass in the same direction as the arrow, λ in this reverse bus (upper 50th roller 15A as an ltl roller and upper 10th roller 16A'i mentioned above) And a strong pushing force similar to that of the upper 20th-ra 12A can be obtained.

Incidentally, if the upper 10th la IIA and the upper 60th la 16A and the upper 20th la IIA and the upper 50th la 15A are set in a symmetrical rolling relationship, the rolling operation of each roller can be almost corrected. Reversal correction can be done without the need.

Further, the mechanism for moving the roller forward and backward preferably has an @ inserted into a space along the roller axis direction with respect to the frame for supporting the roller.

If the roller advancing and retracting devices 1 and 4 are constructed using such a wedge means, the frame for supporting the advancing and retreating rollers can have a highly rigid frame structure without requiring a large space for advancing and retreating, that is, raising and lowering. can.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 5 and 6. Incidentally, for ease of explanation, the same reference numerals as those shown in FIG. 4 are used.

The drawing and strong reduction type scraper according to this embodiment is constructed by arranging six upper rollers IIA to 16A and five lower rollers 11B to 15B in a staggered manner as rollers for straightening work. Each roller IIA~16A, IIB~15
13 is a reinforcing roller 21A to 2 from the opposite side of the straightening line.
6A and 2113-258. The upper frame 27 that supports the upper roller groups 11A to 26At is
Lower roller groups 11B to 25Bf: These are provided to be movable up and down relative to the supporting fixed lower frame 28. That is, the upper frame 27 and the lower frame 28 are formed by a plurality of vertical rods 29.
The lower frame 28
is mounted and fixed on a flange 30 provided at the lower N2 portion of the rod 29. The upper frame 27 is slidable on the rod 29 via a bundling 31. And rod 2
A threaded portion 32 is formed at the upper end of the casing 3 formed on the upper surface of the upper frame 27.
It is threadedly engaged with a worm foil 34 held within the worm wheel 3.

This worm wheel 34 is aligned with a worm 35 connected to a rotating/driving machine 4 such as a motor (not shown). Then, as the worm rotates 350 times and is driven, the worm wheel 34 rotates I%B, and the threaded portion 32 of the rod 29
By moving up and down along the upper frame 27, the upper frame 27 moves up and down relative to the lower frame 28.

Strong pressure lower roller 13A of the upper roller group.

14N is attached to the upper frame 27 through bearings 36 together with the reinforcing rollers 23A and 24A so as to be able to be raised and lowered integrally with the upper frame 27, and the amount of parallel reduction is set by raising and lowering the upper frame 27.

The lower rollers 8i, 11B...1513 are mounted to the lower frame 28 via bearings 37 together with the reinforcing rollers 21B...2513.

1st, 2nd, 5th, and 60th of the upper rollers ljr
La IIA, 12A, 15A, 16A are the 11th ones, along with Yamago rollers 21A, 2tB, 2sA, 26A.
Kasumi 38'j: A small amount of elevation i5 to the upper frame 27 via
In other words, as shown in FIG. 6, a space 39 is formed along the roller axis direction of the upper frame 27. Within this space 39, a pair of wedge bodies, e.g. A movable wedge 40 and a driven wedge 41 are housed with their wedge surfaces in sliding contact with each other.The movable wedge 40 is formed in a length that allows it to move within the space 39 by a predetermined width, and is rotatably driven. For example, it is connected to a motor 42 via a nut 43 and a screw 44.

45 is a coupling that connects the screw shaft 44 and the motor 42, and 46 is a bracket to which the motor 42 is attached. As the motor 42 rotates, the movable wedge 40 moves in the roller axial direction via the nut 43 and the screw +lib 44e, and the driven wedge 41 advances and retreats below the upper frame 27.

Then, on the lower surface of this driven draft 41, the first
2nd, 5th, 60th-La IIA, 12A, 15A.

16A indicates reinforcing rollers 21A, 22A, and 25A.

26 (of the upper rollers IIA, 12A, 15A, 161), and is attached to this driven wedge 41 to move up and down. 48
The upper frame 27 is supported by means for biasing the upper frame 27 from the E line in the backward (upward) direction, such as V, by a spring mechanism 49. ν1, shaft 5 for supporting the bearing box 48
The shaft 50 is inserted into the upper frame 27, and a shaft 51 provided at the upper end of the shaft 50 is biased toward the upper end by a compression coil spring 52. In addition, each roller IIA, 1
2A.

The shafts 53 for driving 15A and 16A are connected to the -C rotational drive mechanism via a universal joint (not shown).

When straightening the plate material 10, set the upper 3rd and 40th rollers 13A and 14A of the strong pressure TR to a predetermined lowering position together with the upper frame 27, and 2.
45 and out (j roller 11A.

12A, 15A, 16A for 42! It is set at a predetermined height position by a mechanism 38. For example, each roller for straightening work IIA...16A, IIB...
・15B roller diameter 1250mm, roller pitch 26
When straightening a plate material with a thickness of about 6 mm and a width of about 4000 m+n using a repeller with a 5 wn-roller surface length of 5500 mm, the rolling reduction amount δ of each roller may be determined as follows.

δ=0 in the 10th-La IIA, δ in the 20th-La 12A
=10 crystals, 3rd and Ij! 40-La 13A.

In 14A, δ=15, and in 50th-La 15A, δ=1
0 rmM, in the sixth o-ra 16A, δ=0° If the correction operation is performed by setting such a reduction amount δ, the first and second o-ra
The plate material 10 held by the upper rollers IIA, 12A is reliably bitten by the f, 3rd and fourth upper rollers 13A, 14A for strong pressure, and the plate material 10 is bent by the fifth and sixth upper rollers 15A, 16A. is gradually released and a sufficient corrective effect can be obtained.

Also, for crowds! ] Rollers IIA, 12A, 15A.

16A vs. arrangement i' that can be calibrated in height? , t: “4
Since the rollers 11A, 12A, 15 can be straightened by sequentially changing the pass direction of the plate material 10, the rollers 11A, 12A, 15
A.

By setting the 16Ai in a symmetrical height arrangement, it is possible to achieve the same straightening effect for each bath, and moreover, it is possible to perform the rolling reduction of each roller almost without having to readjust or harden it. It also has the advantage of reducing time and contributing to improved productivity.

In the center, Roller IIA on the crowd side using Kuneiso Jo 38.

Since the heights of 12A, 15A, and 16A can be adjusted to 111 fl, the height adjustment section can be placed in the small space provided on the F side of the upper frame 27, thus saving extra space. A compact structure can be realized without the need for a shark, and with a highly rigid frame structure.

Incidentally, in the above embodiment, two rollers on the money receiving side that can adjust the height A are set, but three or more may be used. However, as mentioned above, in order to obtain the value (λ>8) obtained empirically as the condition for biting into the strong reduction roller, it is sufficient to support the plate material 10 with two VCs of person H. Accurate 1.3
has been done.

Incidentally, in the above embodiment, only the upper roller is moved up and down and the cylindrical length is adjusted.This is because the feeding reference plane of the temporary phase 10 is kept constant, so that the correction action can be easily performed. If necessary, the lower roller group may also be configured to be able to adjust the height 14 or the taste.

Furthermore, the present invention improves the biting property by increasing the coefficient of friction 7) between the plate material and the rollers (from equation (1) above). If the coefficient of friction between the temporary phase 10 and the roller is increased by increasing the coefficient of friction between the temporary phase 10 and the roller by using the unevenness of the roller, the biting property can be further improved. For example, if the roller is subjected to shot blasting, the friction coefficient between the plate material and the roller is μ=0.
It becomes about 2 to 0.25, and the improvement of the j indentation property and, as a result, the straightening effect is extremely improved. In addition, roller 1 for strong pressure
For 3A, 14A, etc., the force for increasing the friction coefficient ■work khIIiL, so as to prevent t due to slipping of plate set 4, The effect is improved.

〔Effect of the invention〕

As mentioned above, according to Akira Kotsura, among the group of straightening rollers, at least two rollers ′ (il) on the entry side in the direction in which the plate side advances are arranged in line with the straightening line and can move forward and backward. In order to set a friction coefficient that allows the plate material to be inserted into the straightening roller to be sufficiently penetrated, the feeding condition can be controlled at the input side of the plate material, and it is possible to control the feeding condition on the input side of the plate material. An excellent effect W= that the correcting effect on 4Δ can be fully exhibited can be achieved.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram showing the bending situation of a plate material, Fig. 2 is an explanatory diagram showing a single insertion situation of a plate material, and Fig. 3 is a diagram showing the relationship between the roller reduction amount, the biting limit angle, and the degree of bending. Characteristic diagram,
Figure 4 is an explanatory diagram showing the principle of the present invention, and Figure 5 is a January fruit jj! '4 e'lJ k Nobunari diagram of the main part shown in partial cross section, and FIG. 6 is an enlarged cross-sectional view showing the wedge part. 10...1 11A-1ijA, 11LI~15
13...Working no rY-ra ar% l ] A, 1
2 A, 15 A. 16A...11L roller that can be retracted, 38...Wedge mechanism, 40...ijJ! Hari (a lot; (, 41...jl
”21・υ(Togei. Agent: Patent attorney Tatsunosuke Takakarasunuma, 1st figure, 2nd line, 31st D mo/(-Kasumi 5th Pha′;) h″ 0

Claims (1)

[Scope of Claims] 1. A strong reduction type leveler for straightening the temporary phase by repeatedly bending the temporary phase by inserting the temporary phase into the rollers arranged in a staggered manner. A temporary phase force-down type spatula characterized by being provided movably toward and away from at least two rollers located on the entry side of a roller group and at least two rollers located on the entry side of a ladle. 2. Patent/I Claim 1, wherein the rollers moving forward and backward in the straightening line of the plate material are arranged symmetrically on the outgoing side with respect to the center point of the roller group arrangement. Ceremony Bella. 3. In claim 1, the rock for advancing and retracting the roller (A 4 is fft1% having a wedge inserted into a space along the roller axial direction with respect to the frame for supporting the roller.
A pseudophase strong pressure type spatula characterized by consisting of a structure.