Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
  • B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
  • B21B1/088—H- or I-sections

Definitions

• the present invention relates to a method and apparatus for rolling a profile having flanges.
• the present invention relates to a rolling method and an apparatus for forming a shaped member having a flange, that is, an H-shaped member, a thin-shaped member and a similar shaped member product.
• FIG. 1 shows a conventional rolling equipment row for rolling a profile having a flange, and an example of a roll hole shape corresponding to the rolling equipment.
• Fig. 1 (a) shows an example in which double or triple rolling mills are arranged from rough rolling to finish rolling, and these are used to roll I-shape and channel steel.
• Figures 1 () and 1 (c) show that a double or triple rolling mill is arranged for rough rolling, and a universal rolling mill is arranged for intermediate rolling and finishing rolling.
• Fig. 1 shows an example in which a double or triple rolling mill and a universal rolling mill are used as appropriate for finishing rolling, from rough rolling to intermediate rolling, to roll a straight sheet pile.
• the rolling rolls and rolling rolls used from rough rolling to finish rolling correspond to the type and size of the product to be manufactured.
• Guides as accessories to the tool must, in principle, be prepared exclusively for the product. Therefore, it has the disadvantage that it is costly and cannot be easily handled to meet the needs of customers, such as diversification of product dimensions and expansion of the production range.
• H ⁇ ⁇ is described below as a specific example.
• build-up H-forms in which steel sheets are joined by welding and assembled and manufactured.
• products of any size of H-type III can be freely manufactured according to needs. That is, the product thickness of H ⁇ ⁇ , whose web thickness is relatively thin compared to the thickness produced by the conventional rolling method, or the H-shaped product series with various flange thicknesses that keep the outer width of the web constant. Is a typical need.
• ⁇ ⁇ ⁇ which has various flange thicknesses with the width of the web kept constant, is a product that is advantageous for bonding between beams and construction when used as a material for beams.
• the reasons for the lack of production are as follows.
• Fig. 2 (a) shows a typical example of a conventional row of H-shaped rolling mills, one breakdown rolling mill 1 (BD), and then a four-roll universal rolling mill (RU). ), Edge rolling mill (E) group 2 (RU-E), and 4-port finishing universal rolling mill 3 (FU).
• BD breakdown rolling mill 1
• RU four-roll universal rolling mill
• FU 4-port finishing universal rolling mill 3
• FIG. 2 () shows the shapes 4, 5 and 6 of the rolled material formed by the rolls of the rolling mills 1, 2 and 3 in FIG. 2).
• the third surface is a roll for universal rolling that rolls the H-form
• OMPI This shows the relationship between the materials to be rolled, and the dimensions of the rolls that can be freely changed by the same set of rolls during rolling due to the function of the universal rolling mill are between the upper horizontal roll 7 and the lower horizontal roll 8. Only the gaps 12 and 13 between the gap 9 and the right and left vertical ports 10 and 11 are provided. Therefore, although the web thickness 9 and the flange thicknesses 12 and 13 of the H-shape II can be changed, the web inner width 'IW must be constant. As a result, when rolling series with different thickness 9 of the H-shaped product, if the flange thicknesses 12 and 13 on the left and right are changed, naturally the web inner width IW and the flange thicknesses 12 and 13 on the left and right are summed up. The width of the pit 0 W must be changed to various dimensions.
• the web outside width by off La Nji thickness T f, the change in T f 2 with the web within the width IW is constant OW h OW z
• the product series has a constant inner web width, and it is difficult to manufacture a product series with a constant outer web width. If the EB outer width OW is a constant H-shape product series manufactured by the conventional rolling method using a universal rolling mill, the rough rolling-intermediate rolling-finishing should be performed according to the change in the web inner width. Most of the upper and lower horizontal rolls in the entire rolling process must be prepared, which requires a large amount of roll production, and frequent rearrangement of the rolls must be performed.
• An object of the present invention is to solve the drawbacks of the known conventional rolling method and to provide a method and an apparatus for efficiently producing various sizes of shapes.
• the present invention is also applied to a method and an apparatus for producing various sizes of a shaped material having a flange other than the H shape, that is, a thin shape, an arrow, and the like.
• Ulugi in the optional process of the simple rolling process and the uplifting process, Ulugi is in contact with the inversion of the material flange, and the center of the opening is perpendicular to the direction perpendicular to the rolling direction.
• a port that is inclined at a predetermined angle 6H is arranged. The roll extends the web in the width direction by engaging the flange with the web.
• the roll may be configured to engage the upper and lower surfaces of the web.
• the axis of the roll may be inclined at a predetermined angle of 5 V above and below the horizontal plane.
• v is in the range of 0 to 30 °, preferably 5. It is as follows.
• the angle H is 0 to 50. And preferably 15. It is as follows.
• Fig. 1 is a diagram showing an example of a conventional rolling equipment row for rolling a profiled material with a flange and a single-hole hole type corresponding to each rolling mill from rough rolling to finish rolling.
• Fig. 2 shows a typical example of the conventional H-type ⁇ rolling equipment line, and the shape and terminology of each material cross section rolled by each of the rough (BD), intermediate (RU-E) and finishing (FU) rolling mills. Diagram showing definitions,
• OMPI Fig. 3 is a functional explanatory diagram of the universal rolling mill based on the relationship between the rolling roll of the universal rolling method for rolling ⁇ ⁇ ⁇ and the material to be rolled,
• FIG. 4 is a diagram illustrating a cross-sectional change and definition of terms in a product series having a constant web inner width, which is described as an application example of the present invention.
• FIG. 5 is a diagram illustrating a skew roll type sizing mill of the present invention. Diagram showing an example of rolling equipment row when incorporated
• FIG. 6 is a front view of a mouth structure for schematically explaining the mechanism of the present invention and its functions.
• FIG. 7 is a plan view based on one embodiment of the skew roll type sizing mill according to the present invention, and is a detailed explanatory diagram of the mill function.
• FIG. 8 is a skew opening mill according to the present invention.
• FIG. 1 is a front view based on an embodiment of a method sizing mill, and is a structural explanatory view in which the axis of a skew opening can change three-dimensionally;
• Fig. 9 is a front view of the case where the H-section steel tube is widened and rolled by the conventional rolling method.
• FIG. 1G is a detailed explanatory view of a method of rolling an H-shape product having a constant web outer width as an application example of the present invention
• FIG. 11 is a diagram for explaining an example of the calculation contents of the H-shaped lobe widening condition based on one embodiment of the skew roll type sizing mill according to the present invention.
• FIG. 12 is a diagram showing portions corresponding to respective partial dimensions of the product in Table 1.
• O PI Fig. 5 shows an example of a rolling mill line manufactured by Port H. Fig. 5, 14 shows an example of a skewing roll type sizing mill.
• Fig. 6 shows the outline of the roll installed on the skew roll type sizing mill and its functions. As shown in the front view (a) of FIG. 6 and the side oblique view from above (b) of FIG. 1515, 15 ', 16 and 16', which are close to the flange of entry-side rolled material 17 having an H-shaped cross-section as shown in Fig. 6). Caused by contact and pressure reduction
• the skew force has the effect of widening the web and the action of widening the web by pushing and expanding the inside of the flange of the H-shape with the outer surface of the skew roll.
• These two web widening functions can exhibit their functions according to the web widening amount by the independent action or the synergistic effect of the two actions.
• the direction of the axis of the roll can be freely changed three-dimensionally, so that the skew force is applied to the material to be rolled.
• This is a rational and efficient widening rolling method that acts on the underlying widening force.
• the structure of the oblique-hole type sizing mill according to the present invention is significantly different from the structure of the conventional profile rolling mill.
• the axis of the mouth is fixed in the direction perpendicular to the rolling direction.
• the direction of the left and right roll axis S is not perpendicular to the traveling direction of the material but has an angle of 5 °. And it can change arbitrarily, that is, the right and left ⁇ -rules are “skewed” in a ⁇ wedge shape in the direction of the material movement. This is defined as a skew roll in the present invention. Further, as shown in the front view of FIG. 8, it can be made parallel to the horizontal plane, and can have an arbitrary angle V.
• the skew rolls 15, 15 ′ 16, 16 ′ in the figure are pressed down from above and below the web of the incoming rolled material 17 having an H-shaped cross section 18, it is propelled in a direction that makes an angle of H with the X axis Force FR is attached to the web.
• the component force FL of the propulsion force FR acts as a force that pulls the rolled material in the traveling direction
• the component force FC of the FR acts as a force that extends the web at right angles to the traveling direction and to the left and right.
• This force FC is one factor that widens the web by stretching the inside I in the width direction.
• each of the inclined surfaces 19, 19, 20, 20 ′ come into contact with the flange inner side surfaces 21, 22 of the entry-side rolled material 17, whereby a force acts to push and expand the flange falling surface at right angles to the traveling direction of the rolled material and in the left-right direction.
• the press ⁇ gel strength is another one of the elements ⁇ stretching a web in the width IW t.
• FIG. 9 (a) is a front view of an example in which the rolled material M prepared in the shape shown by the solid line is rolled down by a conventional rolling method by applying a reduction to a portion ⁇ w of the web.
• Upper and lower horizontal edges HH ⁇ is the portion of the web that has been subjected to a rolling force ⁇ ⁇ ⁇ ⁇ by ⁇
• metal flow deformation occurs.
• Metal flow is generated not in the width direction but in the traveling direction of the material to be rolled based on the propulsive force transmitted from the nozzle only in the traveling direction of the material to be rolled.
• (1) and (2) above are both actions that attempt to elongate only in the traveling direction of the material to be rolled, and only (3) is an action that is perpendicular to the direction of travel of the material being rolled, that is, the action that widens the hub. It is. Therefore, imbalance in elongation occurs between the flange and the web, which cannot be elongated in the traveling direction because they are not rolled, and phenomena such as web waves occur.
• the skewing force causes the rolled-down portion of the web to cause the Aw to actively generate a metal flow in the web widening direction. Since the imbalance of the web is extremely small, the web width can be easily adjusted.
• the flange inner surface F! Starts rolling from the constrained state where the outer surfaces of the horizontal ports H 0 and H u are in contact with each other, and after rolling, it is in a free state where it does not come into contact with the side surface of the horizontal roll and is not restrained at all.
• the width of the inner tube is unstable later.
• the skew of the roll t ⁇ ⁇ Since the constrained state of contact between the start and end of rolling is maintained on the surface, the inner width dimension of the web after widening has a stable value.
• FIG. 9 (b) shows a front view of another example of widening rolling of the tube by the conventional rolling method.
• the width of the web is ensured by preparing a material M having a bent web, and the upper and lower horizontal holes H o, H of the conventional rolling method are secured.
• the rolling force is applied by u to widen the web.
• FIG. 5 shows an example of a rolling equipment row for producing an H-shaped product series having a constant outer web width as an application example of the present invention.
• the combination of the intermediate universal rolling mill (RU-E) 2 in Fig. 5, the oblique-hole type sizing mill (SS) 14 and the finish rolling ⁇ (FU) 3 makes it possible to maintain a constant web outer width.
• the purpose of manufacturing the H form III is configured.
• FIG. 10 an example in which the present invention is applied to the manufacture of a product series having an outer width of 0 W—a constant H-shape will be described in detail.
• the flange thickness and Webu thickness and web within the width of the final product IW 5 performs modeling to 26.
• the number of types of the cross-sectional shapes 25 and 26 formed in this way is not limited. In other words, since the material is rolled and formed by a universal rolling mill in the intermediate process, the web thickness and flange thickness can be changed freely, and the required number of products can be changed according to the product series. Different cross-sectional shapes are formed. However, the web inner width IW i is constant, and the web outer width 0 W, is not always constant.
• the rolled material formed by the intermediate universal rolling mill 2 with a cross-sectional shape of 25 or 26, or, if necessary, a cross-sectional shape with a different thickness of flange and flange, is a skewed rolling sizing mill. It is sent to Nore 14.
• These rolling stock are each a skew rollers scheme Sai Jingumi Le 1 4 rolling stock 27 which is widened rolled to various Uwebu the width IW 2 required according to the product of the Series by.
• This eb width 2 oc corresponds to the web inner width variation 2 ⁇ in the product series of constant outer width H-section steel. That product Siri - web inner width IW 5 narrowest product 3 1 flange thickness variation ⁇ 2 times the amount of web in the width change amount of the product of 2 relative to the flange thickness at the maximum among's) 9
• the rolled material 27 produced separately by the skew roll type sizing mill of the present invention is uniformly rolled by the finishing mill 3 into a section 28 having various web inner widths IW 4 according to the product series.
• the product 29 has a constant web width and an inner width IW 6 according to the product series.
• the product 31 with the largest flange thickness and the smallest web width in the product series can be manufactured with a skewed roll with an eb width of 0, and the web width as shown in cross section 30 IW 3 is set to a value compatible with Uebu the width IW t product corresponds to the web inner width IW S, and the medium between the universal rolling machine (RU-E) 2 of section 25, 26.
• FIG. Fig. 11 is a plan view of the skew roll, and the dotted line shows the shape of the material to be rolled and the state of the widening of the roll.
• Fig. 11 (3 ⁇ 4) shows the front view of the skew roll
• Fig. 11 ( c) shows projections from the outer surface of the skew roll, for example, in these figures, the symbols necessary to determine the widening conditions are indicated by symbols, and the definitions are explained first.
• IW Rolled Web width of the material
• L Distance from the intersection point Z of the skew roll axis shown in the plan view to point 0 on the outer surface of the skew roll.
• Arrow A A skewed port that contacts the inner surface of the flange of the material to be rolled, indicated by A—arbitrary distance in the flange width direction from the web surface 0 of the outer surface of the roll,
• X e distance from the contact start line C-C to the roll center line 0-0 on the surface where the skewed roll contacts the rolled material flange, indicated by arrows A-A,
• R the radius of the ramp ⁇ ⁇
• the amount of reduction of the web by the skewed roll (the amount of ⁇ is the amount of reduction Ah / 2 covered by one skewed roll), xw Distance from the rolling start point to the rolling end point 0 of the skewed roll that comes into contact-y
• the outer surface of the skewed roll starts to contact the inner surface of the rolled material flange. Displacement in the axis Y-Y direction from 0 to 0 center,
• skew roll ⁇ At an arbitrary distance Xf in the flange width direction from point 0 of the fall surface, the outer fall surface of the skew roll is in the flange of the material to be rolled.
• the amount of displacement in the axis Y-Y from the start of contact with the side surface to the end of contact, that is, the outer surface of the oblique port is in contact with the inner surface of the flange of the material to be rolled, and Displacement acting as a pushing force
• the amount of displacement in the Y-Y direction from the start of rolling down to the end of rolling after the contact of the skew port with the web of the material to be rolled, i.e. the circumferential surface of the skew roll is the material to be rolled.
• the skew force generated by rolling down the web of the rolled material acts as a force to stretch the web of the material to be rolled in the width direction,
• the conditions for the ⁇ ⁇ widening can be calculated from the above formulas (1) and (2).
• the web of the material to be rolled is easily stretched by the fact that the two elements of the web widening, ie, w function as a synergistic effect, and the amount of widening is set by Eqs. (1) and (2). It can be changed freely by adjusting the three elements L, ⁇ beneficia, and ⁇ h / 2 as shown by.
• the above coefficients can be appropriately selected depending on the rolling conditions.
• the axis of the skew roll can be parallel to the horizontal plane and can have an arbitrary angle 5 ′.
• ⁇ ⁇
• the preparation and replacement of a large amount of jaws and their accessories is omitted by separately forming the inner width of the web in the pre-process of finish rolling.
• the horizontal roll of the finishing mill can be rolled by replacing the roll supplied to the product from the previous process with a web suitable for the width of the web F for various products with different inner widths.
• Most preferred for obtaining a product of if the amount of change in the web radiation is small, it is possible to share the finishing port, or by changing the width of the finishing port, the replacement of the finishing port can be saved. .
• the wear of skewed rolls is not much different from that of the conventional rolling method, and even if slight roll wear occurs, it can withstand a large amount of rolling by adjusting the rolls and can be used in various size ranges. You.
• Table 1 shows an example of the application range.
• Table 1 (indicates part of the standard cross-sectional dimensions of the current H type II specified in JIS, and () indicates an example of the applicable range.
• Each part of the product shown in Fig. 2 is shown in the table (a), the product series of nominal dimensions 400 mm 200 ⁇ and 450 x 200 mm of H type is constant in the inner width of the tube.
• Rolls for rolling, roughing, intermediate, and finishing processes and their accessories are separately prepared for manufacturing, where W is an oblique-roll type sizing mill. The rolls for the rough and intermediate stages of rolling and their accessories are prepared with only a set, so that a new intermediate size can be set up in addition to the H-shape with a constant inner and outer width of the web. This shows that different sizes can be created without any change in quality.
• the method for rolling a profile using the skew roll according to the present invention has a function of efficiently producing a small number of various types of profiles, and can meet the diversifying current market needs. It can be said that this is an excellent technology that can respond properly.

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• Engineering & Computer Science (AREA)
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• Metal Rolling (AREA)

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• 1983
  • 1983-05-04 JP JP58077391A patent/JPS59202101A/ja active Granted
• 1984
  • 1984-05-04 BR BR8406850A patent/BR8406850A/pt not_active IP Right Cessation
  • 1984-05-04 US US06/693,267 patent/US4685319A/en not_active Expired - Lifetime
  • 1984-05-04 AU AU28645/84A patent/AU561482B2/en not_active Expired
  • 1984-05-04 WO PCT/JP1984/000226 patent/WO1984004263A1/ja active IP Right Grant
  • 1984-05-04 EP EP84901807A patent/EP0142568B1/en not_active Expired
  • 1984-05-04 DE DE8484901807T patent/DE3479970D1/de not_active Expired

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