WO2002097153A1 - Procede de galvanisation a chaud d'un element structural en forme de i - Google Patents

Procede de galvanisation a chaud d'un element structural en forme de i Download PDF

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Publication number
WO2002097153A1
WO2002097153A1 PCT/JP2002/005122 JP0205122W WO02097153A1 WO 2002097153 A1 WO2002097153 A1 WO 2002097153A1 JP 0205122 W JP0205122 W JP 0205122W WO 02097153 A1 WO02097153 A1 WO 02097153A1
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WO
WIPO (PCT)
Prior art keywords
web
shaped
attached
plating
flange
Prior art date
Application number
PCT/JP2002/005122
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English (en)
Japanese (ja)
Inventor
Kazuo Handa
Yoshihiro Murakami
Hirotsugu Fujimoto
Masayuki Fujimoto
Koji Yanagawa
Kohei Kikukawa
Original Assignee
E Tech Incorporated
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2001156403A external-priority patent/JP3260353B1/ja
Priority claimed from JP2002041431A external-priority patent/JP2003239058A/ja
Application filed by E Tech Incorporated filed Critical E Tech Incorporated
Publication of WO2002097153A1 publication Critical patent/WO2002097153A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
    • C23C2/36—Elongated material

Definitions

  • the present invention relates to an I-shaped structure, and more particularly to a method for melting an I-shaped structural member for a bridge. Background leakage
  • the ⁇ members for bridges vary depending on the type of rice girder type, box type, truss type, etc.
  • the sheet girder type has a web (also called I ⁇ plate) 1 as shown in Fig. 13
  • a boat I with a flange 2 attached by welding or the like is used.
  • These 1-types can be used as vertical stiffeners and salivary stiffeners as shown in the examples.) 3, or by welding a flat stiffener (not shown) to both sides or one side of the web 1.
  • I-shaped Jiangsu attachment since such an I-shaped Jiangsu attachment is used by being connected in a vertical direction, a large number of joint port holes or joint holes are formed on both webs 1 and flanges 2 as shown in Fig. 13. Is provided.
  • the “I-shaped structure” when used for ⁇ , etc., it is painted or plated with lead (hereinafter simply referred to as “plate”) to prevent hood.
  • the latter zinc plating is carried out by immersing the ⁇ I member in a molten M plating bath (approx. 440 ° C), usually 4 ⁇ ; L for 0 min, then lifting the bow from the bath and cooling it. .
  • the protection by such a hot-dip lead has superior corrosion resistance compared to painting [life and economy], but has a major problem of deformation as described below.
  • Such intrusion and torsion in the I-shape section change under the influence of the web height and height, the yield of steel ⁇ , etc., and the smaller the thickness, the larger the height, and the higher the yield strength, It increases as the degree decreases.
  • the deformation also depends on the thickness ratio between the flange and the web, the plating immersion conditions, and the like. As the plate thickness ratio increases and the plating immersion speed decreases, these deformations tend to increase. In particular, torsion, in addition to these factors, naturally increases with the length of the member.
  • this stopper material is one of the measures to prevent the deformation at the edge of the web.
  • this method is only to prevent the end of the I-shaped structural sound from sticking, and has little effect on the prevention of the end of the end portion from being stuck or twisted.
  • the anti-sling material attached to I ⁇ ⁇ ffit ⁇ ⁇ is provided, it is still open and has a degree of freedom of deformation. It has almost no effect on deformations such as torsion and bending, and these deformations occur in the same way as in the UK without the provision of anti-jamming material.
  • the thickness of the web If it is quite thick (for example, 1: 3 or more), and if the sound length is long (for example, 12 m or more), the shape of the I-shaped material due to zinc plating will be more twisted or bent, and the web will be more stuck at the end. growing.
  • the present invention provides a simple and inexpensive plating method that can prevent deformation such as entanglement, twisting, bending, etc., of zinc plating of I ⁇ port construction members converted to sheet girder. It is also effective for transportation, storage, and construction of the I-type. Disclosure of the invention
  • the present invention has been obtained as a result of various studies to achieve the three objectives, and has the following constitutional requirements.
  • the upper and lower restraining members connecting the adjacent flanges of the I-shaped structure are connected by a reinforcing material.
  • a spacer is interposed between the web and the restraining member, or between the web and the anti-deformation stopper, to provide a gap between the restraining member or the detent prevention stopper and the web.
  • FIG. 1 is a plan view showing a notch cross section of an I J ffig attached to an example of the present invention.
  • Figure 2 Left side view of Figure 1.
  • Figure 3 Drilling diagram of the embodiment with restraint according to the present invention.
  • FIG. 4 Side view corresponding to FIG. 2 in another aspect of the invention.
  • FIG. 5 Control diagram corresponding to FIG. 2 in another embodiment of the present invention.
  • FIG. 6 Side view corresponding to FIG. 2 in another embodiment of the present invention.
  • Fig. 7 Schematic view of the surface of another SH of the present invention.
  • FIG. 8 Schematic diagram of the side ffi in another embodiment of the present invention.
  • FIG. 9 is a schematic side view of another embodiment of the present invention.
  • Fig. 10 Schematic view of a hood in another II of the present invention.
  • Fig. 11 View of spacer.
  • Fig. 12 Illustration of torsion measurement with I-type release.
  • Fig. 14 1S side view with I Mig sound attached with «Non-jam stopper.
  • Fig. 15 I-shape of another example of the present invention.
  • Figure 16 Right side view of Figure 15.
  • Fig. 17 Cross-sectional view taken along line BB in Fig. 16.
  • FIG. 18 Cross-sectional view corresponding to FIG. 17 in another U of the present invention. Explanation of reference numerals
  • Stopper 5 Vertical stiffener 6: Port
  • the lead plating method of I ⁇ ⁇ i ⁇ is a method of melting at least two I, which is not immersed in a molten bath and zinc plated, as in adopted Attached to the I-shaped ffiii sound at a plurality of places including the I-direction (longitudinal method) of the I-shaped ffiii sound (both unless otherwise specified means both ends of the m-direction).
  • the feature is that the melted MM bells are connected in the state of being connected.
  • the present invention performs the galvanized plating in such a manner that a plurality of I-gethers are connected by detention in a plurality of glands including the two, by using a continuous yarn ⁇ 1 "with the restraint. Even if two adjacent I-Nada attachments are temporarily made into pseudo-units and each I-type attachment is subjected to thermal power in the melting process, This is to prevent the structural members from being deformed freely, that is, by strengthening the IJ sound attachment in this way, the I ⁇ « ⁇ attachment receives heat during the plating process. It is based on the fact that even if it is deformed, it is constrained to each other by the restraint and the deformation is remarkably suppressed.
  • the above-mentioned I-shaped structure requires a hot-dip lead plating for a P direction and a metal which can obtain required properties as various types of iii materials! It is usually made of $ 3 steel.
  • the disgusting 31-type ffii members are large I-type attachments that cause distorted or twisting deformations, etc. in the melting process, and usually have a sound attachment length of 4 m or more. Effective for inventions.
  • the thickness and dimensions of the I-shaped sound-added web and flange are mainly determined by the application. As a practical range, the web thickness is 5 to 20 mm and the height is 100 to 300. It has a thickness of about 100 mm, a flange thickness of about 100 to 50 mm, and a width of about 200 to 800 mm.
  • the number of I-shaped structural members connected to form a pseudo unitary structure is usually two, but is not limited thereto.
  • the apparent volume of the continuous yarn is more than twice as large as that of the single I-mesh, so a liquor bath for liquor is required.
  • the overall mass is significantly increased, which increases the load on the ⁇ and its transport to the plating bath, and reduces the workability of the solder plating.
  • the restraining member of the present invention must be capable of preventing or suppressing the deformation of the above-mentioned I-shaped structural member against thermal stress in the process of hot-dip plating. For this reason, they are usually made of steel with a large 3 ⁇ 4Jt. Also, examples of the form with the constraint include a plate-like body, a frame body that is framed by truss or fiber, an angle material, a mountain, or a binding bar. Which type of detention is narrowed mainly depends on the connection method of the I-shaped members and the connected I-shaped ffii sound! »It is preferable in terms of installation workability.
  • self-locking is provided at a plurality of places including both ends of the I-shaped bracket.
  • the middle part of both ends 3 ⁇ 4 ⁇ ⁇ connect as necessary I-type If the ffit member is so long, it is enough to connect both ends, but: fck I-type
  • the center of the I-shaped structural member is also connected with a constrained sound.
  • the number of connections can be increased to two or more if necessary, in which case the restraint sound at both ends and the restraint at the middle part are different even if the same shape is used. May be used.
  • the present invention for the purpose of suppressing the deformation of the web by entangling, it is possible to attach an S entrapment material to the web of the I-shaped member connected in accordance with the restrictions.
  • the anti-jamming material is particularly suitable for I-shaped structural members in which the height and length dimensions of the web are large and the jaw deformation is likely to occur.
  • it can be provided on either or both of the web and the middle part, but it is necessary to provide Suitable locations are the ends of the web and the middle of the web without vertical stiffeners.
  • a steel angle material or a mountain ache with high rigidity, usually three bends, is suitable. These materials are cut to the specified dimensions and calendered to the embedding material.Then, using the joint holes of the web, the brackets attached to the web or the boring holes drilled in the web, the web can be cut vertically on one or both sides of the web. (Same direction as vertical stiffener).
  • the I-shaped fine member is restricted by a constraining member: ⁇ means that the two I-shaped structural members adjacent to each other with the web facing »are preferably 0.5 to 1.5 m, particularly 0.8 to 1 m.
  • ⁇ means that the two I-shaped structural members adjacent to each other with the web facing »are preferably 0.5 to 1.5 m, particularly 0.8 to 1 m.
  • Om are arranged side by side, and in this state, the both ends of the web are connected by restraint attachment.
  • the attachment method differs depending on the connecting position and the form of the restraint attachment, but most of the joint holes, Use the bracket attached to the I-type attachment in advance, or the vertical stiffener of the I-shaped member, the port hole drilled in the web or flange, and secure with the port.
  • the joints at both ends are provided with joint holes as if they were selfish, so that both ends can be easily connected by engaging the joint holes.
  • the web 15 is provided with an anti-slip material as an anti-slip deformation itm at the time of melting MM lead plating, it is recommended that the web be restrained via the anti-slip material to maintain it. It is good.
  • the melting MM condition and the condition of the type I ⁇ sound can be controlled in the same manner as in the suspension method. Therefore, these conditions are not described in detail, but as a general outline, the plating conditions are as follows: bath ⁇ S: 435 to 445 ° C, immersion in the valley MS: 10 to 3 Om / min, immersion angle: 1 5-2 5 degrees, withdrawal 1 ⁇ : l OmZ, pulling angle from initial 5 degrees to final 30 degrees is preferred. Conditions Temperature: 60 to 80 ° C,: about 10 to 3 Om / min, Immersion angle: about 20 to 30 degrees, and pulling up and angle are arbitrarily selected.
  • Fig. 1 is a plan view of two I instantaneous joints connected by a constrained sound attachment 3
  • Fig. 2 shows the left side view
  • the cutaway section in Fig. 1 is the A--A part in Fig. 2. It is.
  • two I-shaped fffig notes for rice girder are connected by the constraint shown in Fig. 3 (Appendix 3) .
  • the two parallel I-types are connected at both ends and in the middle, It has a single structure.
  • FIG. 1 shows only one restraining member 3 in the middle.
  • each I-shaped structure before connection is connected to a joint hole 9 (see Fig.
  • I type with sound isolation It is provided on the web 1 and the flange 2 of the end joint. Further, as shown in FIG. 1, the web 1 is provided on both sides of the web 1 at intervals of 5 stiffeners. And, on both sides of the web 1 at both ends of the I-shaped member, the arrogant joint hole 9 is used for the IJ and a stopper 4 made of, for example, an angle material is firmly attached by a port 6. . Portions are provided in advance in the staple stopper 4 located on the inner side of the two I-shaped structural members indicated by ⁇ ij.
  • FIG. 3 shows constraint 3 in this example.
  • the marketing bundle member 3 is formed from a square-shaped steel ribbon, and a polylet hole 8 for attachment is provided at both ends of the bracket 3.
  • the height of the attachment 3 is substantially the same as the height of the web 1 of the continuous I-Rin construction member, or is equal to the height.
  • the width can be determined, but the width defines the distance between two consecutive I-shaped members. If the height of t * in Appendix 3 is too large,
  • the width of the material becomes large as necessary, which affects the size of the bathtub and the storage space after plating and the inside of the hall.
  • the width is too small, the attachment property of attachment 3 to the I-shaped sound attachment becomes poor, and the resistance when immersed in the plating bath increases, so that the immersion must be slowed down. There is. "If the immersion into the bath is small, the amount of torsion that occurs in I ⁇ ⁇ t ⁇ increases. In consideration of these factors, the width of constraint 3 is usually about 50 to 150 cm. Appropriate.
  • the thickness in Appendix 3 is determined so that a bow girl that can withstand the stress generated during the welding process can be obtained. If this thickness force S is small, the required bow can not be obtained, so that the heat force of the lysed thigh lead plating d will cause the detention 3 to be formed, and the scissors, torsion, bending, etc., which will be generated in the I-dori structure Deformation cannot be sufficiently suppressed.
  • the thickness of the restraint member 3 is based on the design specifications of the I-shaped structural sound. It is practical to decide. In the case of a constrained sound attachment that connects an I-shaped ffit II attachment for ⁇ , its thickness is preferably 10 to 50 mm.
  • the restraining member 3 in the middle part is provided with a port hole in the vertical stiffener 5 of the I-Linka member, and is fixed to the vertical stiffener 5 by the port 10 using the port hole.
  • a bracket is attached to a position where the web 1 is to be connected, and a connection Mm3 is attached via the bracket.
  • the two I-shaped structural members are connected to each other at the intermediate portion by the restraint.
  • the I-shaped member of the present example is provided with a straight stiffener 5, a force that does not provide the anti-flush material 4 at the intermediate portion of the I-shape is required.
  • a bracket is provided on the web 1 and the anti-jamming member 4 is mounted in the vertical direction.
  • the stopper 4 is substantially the same as that of the present embodiment in all the embodiments, and therefore, the description of the separating embodiment will be omitted.
  • FIG. 11 shows an example of this pipe washer 17, which is provided with a semicircular hole 12 for zinc outflow preferably having a diameter of preferably 5 to 15 mm on all four ends of the pipe body.
  • the pipe washer 7 may be temporarily attached to the anti-sling material 4 and the attachment 3 for better durability. The wearing of the shoes is the same in all the examples.
  • a plate-like body is exemplified, but a truss, a frame body vertically and horizontally framed, and a composite panel can also be used.
  • FIG. 4 is a side view similar to FIG. 2 showing another example of the present invention.
  • two flanges 2 attached to an I-shaped member S are connected by fixing them with a restraining member 3, thereby forming a pseudo-single unit ffit body.
  • the locations connected by the restraint members 3 may be considered as in FIG.
  • the connection of both ends is made by abutting the restraint 3 on the outside and inside (the ffi of the web 1) of the joint of the flange 2 respectively, and applying these restraint sounds 3 to the flange 2 using the joint holes. It is obtained by fixing at 0.
  • the cross section turns into a U-shaped mountain
  • bacteria can also be used for plate-like bodies and angle materials.
  • the connection may be made only by the outside or inside of the flange 2.
  • the manner in which the restraining member attached to the intermediate portion of the I-shaped structural member is connected to the restraining member at the end is substantially the same. However, since there is no bolt hole for fixing the restraining member to the flange 2 in the middle part, a port hole is provided in the flange 2 and then fixed with the restraining member 3 by T. Further, although the same type of restraining member as the middle portion is used, the middle portion may have a different shape from the both ends.
  • FIGS. 5 and 6 show another embodiment in which two I-shaped ffiii members of FIG.
  • Fig. 5 shows that both ends of the upper and lower restraint members 3 connecting the two 1 ⁇ members outside the flange 2 and the middle part of the two It is a structure.
  • the link tffig by the ⁇ member 3 can be further strengthened.
  • the connection material is welded to the attachment 3 in advance, for example, by welding to form a strong frame that surrounds the outside of the I Sig member, and then inserted and attached to the end of the 1 ⁇ « ⁇ sound attachment. It is preferable to attach Appendix 3 to flange 2 with Port 10.
  • the frame between the connecting member 11 provided outside the I-shaped member and the harness binding member 11 provided between the two I ⁇ ⁇ 3 ⁇ 4g sound attachments is made to correspond to the width of the flange 2. If the flange 2 is formed and both sides of the flange 2 can be sandwiched between the flanges 1 1, it is possible to fix the attachment 3 to the flange 2 simply by fitting an I-shaped member to the frame. However, it is possible to make two I-shaped sounds more difficult. In this case, if the width of the upper flange 2 is smaller than the lower flange 2 as shown in Fig.
  • Fig. 6 shows two I port constructions by fixing the restraint 3 to the I-type release member with Port 10 inside the flange 2 This is an application example of the case.
  • FIGS. 7 to 9 are schematic views showing another example of the pot invention.
  • reference numeral 10 denotes a port for fixing the constraint attachment 3 to an I-shaped Si sound attachment. It is Jutsu's opinion that these fls also form a series of I fu g3 ⁇ 4 sound attachments in Detention 3, which also formed the frame of a rectangular dog.
  • Each frame is made of steel, such as Andal and Yamanori, by welding and is made of various materials depending on the combination of steel. It is possible to obtain the restraining member 3 in the form. That is, the restraining member 3 in FIG. 7 is the simplest rectangular frame (a dog frame), FIG. 8 is a frame obtained by combining vertical and horizontal steel materials with the rectangular dog frame, and FIG.
  • each I-shaped ⁇ is tightened and fixed to the restraint member 3 with bolts 10.
  • FIG. 10 shows a still further embodiment of the present invention, in which two adjacent I-shaped ffi members are fixed with a connecting bar 15 to connect them. It connects and reinforces one upper flange 2 and the other lower flange 2 of the disgusting Irnmt facing each other at in—16. However, there is a considerable effect from the connection 15 alone.
  • FIG. 15 shows one of the most preferred examples of the present invention, and FIG. 15 shows a case where both ends of two I-shaped stiffeners are connected by the fastening members 3. It is a top view.
  • FIG. 16 is a right side view of FIG. 15, and FIG. 17 is a cross-sectional view taken along the line BB of FIG.
  • the left end of I Jliig in Figure 15 is exactly the same as in Figure 5.
  • Each I-shaped structure of the chain has a joint porthole (see Fig. 13) on both sides of the web 1 in order to repeat the girder slightly in the field.
  • the stopper 4 made of Yamazaki steel is firmly attached to both sides of the web 1 in advance by a port 7 beforehand; ⁇ preferable. Since the web 4 can also prevent the web from being deformed by the web 4, the force S provided on both sides of the web 1 as in the example of the web is preferable.
  • the antifouling material on the side that fixes the restraint 3 is located inside the two inverted I-shaped ffii. Port holes for attaching restraint Appendix 3 are provided in the entrapment material.
  • a pipe washer 7 is inserted as a spacer between the web 1 and the anti-slip material 4 so as to melt the S lead.
  • Figure 11 shows this pipe mesh. This is an example of the yarn 7, and is provided with a semicircular hole for zinc outflow having a diameter of preferably 5 to 15 mm at the four corners of the pipe body.
  • this pipe washer 7 is temporarily attached to the stopper 4 (it may be welded by welding).
  • the material shown in Fig. 3 can be used as the listening material 3 in Wei.
  • restraint 3 is formed from steel squares (which may be hollowed out in the shape of a customer tool), and both restraints 3 (5
  • the bolt hole 8 is provided with a force S corresponding to the position of the bolt hole of the disgusting antifouling member 4.
  • the width of the constraint 133 It is about 50-150 cm.
  • the thickness of the restraining member 3 is determined so that the boat can be humiliated against the stress generated in the solder plating process. With the thickness of J, the required bow can not be obtained, so the restraint sound is formed by the influx of the lead plating process. Cannot be suppressed sufficiently.
  • the deformation of I ⁇ mainly depends on the sound length, web thickness and flange thickness, it is practical to determine the thickness of the restraint member 3 based on the design specifications of the I-shaped sound. is there. In the case of a restraining member connecting an I-shaped ffii attachment for ⁇ , its thickness is preferably 10 to 50 mm.
  • the number of ports to be used may be selected according to the size of the member, the size of the boat to which the person is attached, etc., but it is desirable that the number of ports be fixed at the upper and lower portions and at the center of the member. If a strong restraint is attached to both sides of the I-Sig I, the two I-shaped structures can be connected with a restraint sound 3 as shown in Figure 15. When combining I-shaped structural members with vertical stiffeners or flat stiffeners attached to only one side of the web, when these I-shaped stiffeners are arranged side by side, It is preferable to arrange them so that they are sized. Also, in this example, if the direction of attachment of the flap stopper 4 attached to the inner side of the flap stopper 4 to the web 1 is changed, the restraint 4 is attached to the outer side of the flap stopper 4. Can be attached to
  • FIG. 18 shows another embodiment of the present invention.
  • both of the I-type sound-absorbing members are connected to each other by the constraint member ST3 without the interposition of the above-described interlocking member 4.
  • the binding 3 in this example is a thick plate having a U-shaped cross section with ribs 17 formed on both sides, and uses a port hole provided in the rib 15 and a port hole in a joint portion of the web 1.
  • the mi 3 is configured to be directly attached to the web 1 by the port 6.
  • reference numeral 18 denotes a nut stopper plate.
  • the present invention is not limited to the plank of the dog in FIG. 17 and the drawing II in FIG. 18. Although not shown, even if a required bow is secured, for example, a frame-shaped It is possible to narrow things or composite panels. In addition, by simply connecting the opposite ends 15 of the I-ring member with an engagement, a force that can substantially achieve the intended purpose If necessary, for example, the flanges of both parts of the I-shaped i-t member are fixed by other means. Is also good.
  • the I-shaped unit and the middle part are usually connected to the same mountain or link. Is used.
  • the present invention can combine different types of continuous weaving or connecting methods, as if they were self-contained. For example, both sides may be made as shown in FIG. 2 and the middle part may be made as shown in FIG. The connection shown in FIGS. 2 and 4 may be used in combination.
  • the stiffeners were made at regular intervals from steel.
  • each of the two I ⁇ ⁇ i ⁇ attachments was tied together with a constraint attachment, and the samples of Examples 1 to 6 in Table 1 were prepared by the following method.
  • Examples 1 and 2 are the methods shown in Figs. 1 and 2 (only the web is connected with restraint ⁇ )
  • Examples 3 and 4 are the methods shown in Figure 4 (only the flange is connected)
  • Examples 5 and 6 are the figures
  • method 9 connecting the flange and the web with the frame
  • the r conditions are: 440. C, immersion 3 ⁇ 43 ⁇ 43 ⁇ 4: 20 m / min, immersion angle: 15 degrees, withdrawal 3 ⁇ 4g : 1-1 OmZ, and irai conditions (water temperature: 65 ° C, immersion «3 ⁇ 4: 30 mZ, immersion angle) : Welding in accordance with 20®, hurt the “twist” of each plate and the “swarping deformation (flatness of the web)” of each plate in the ⁇ -lead plate.
  • the amount of d shown in Fig. 2 was measured at both ends, and the amount of twist in the larger direction was described.
  • the flatness of ⁇ was measured by measuring the amount of irregularity in each zone tfc3 ⁇ 40 with a vertical stiffener, Table 2 shows the results of these measurements.
  • Example 2 As is evident from Table 2, the I-shape twist and the flatness of the web of Examples 1 to 6 where at least the two sides were connected were the same as those of Example 7 in which only the webbing 15 was fitted with a non-slipper. In all cases, the values are significantly reduced, and it is clear that the twisting of the web and the web deformation are suppressed. In addition, Examples 1, 3, and 5 in which the central part of the Irinzo structure was connected had improved torsion and flatness of the web compared to Examples 2, 4, and 6 in which only both ends were connected. In particular, the effect of preventing torsion has been improved.
  • Flange thickness is 2 Omm
  • web height is 240 Omm
  • web thickness is 12 mm
  • web length is shown in Table 3 below, 6.7 ⁇ : 11.7m for ⁇ I
  • the shape ffi ⁇ ⁇ was made using steel. Then, as shown in Table 3, each of the two I-joints was 20 mm or 30 mm in width and 80 cm in width, as shown in Table 3.
  • the molten lead was plated according to the ordinary method. The relationship between sound length and torsion was measured after solder plating. Table 3 shows the results.
  • Table 3 shows the results.
  • Table 3 shows the amount of twisting on one side of the web where the cracking occurred, as seen in d in Fig. 12 . It was determined by measuring.
  • the amount of torsion can be suppressed to 100 mm *, which is within the practical allowable range, regardless of whether the thickness of the restraint sound is 20 mm or the thickness of the restraint sound is 30 mm. all right.
  • the restraint thickness was 30 mm, the amount of twist could still be suppressed even when the sound length was extremely large, 1 lm or more.
  • the twist S was a force S of 42 mm
  • the flat ⁇ of the web in that case was H / 400 ( ⁇ is the height of ⁇ ⁇ EB).
  • the flat ffiit of the web is obtained by dividing the height of the web by the length of * ⁇ to the ⁇ F side as viewed from the;! ⁇ Direction, and calculating this as ⁇ / ⁇ . 15 Web 15; 3 ⁇ 4 ⁇ interleaving length is 6 mm.
  • the length of the flange of the fs member was changed by changing the thickness of the flange. so, The S lead was melted with the two pieces connected. After plating, the relationship between the ratio of web thickness to flange thickness and torsion was investigated. The results are shown in Table 4. The method of measuring the amount of twist is the same as in Example 2.
  • Table 4 shows that the amount of torsion can be controlled to a maximum of 10 Omrr * within the practically acceptable range for both the restraint member with a 20 mm and the restraint with a j3 ⁇ 4J? Of 30 mm. Also, the ratio of the web thickness to the flange thickness has a close relationship with the amount of torsion. As the flange thickness increases, the amount of torsion increases. It was found that the torsion control effect was larger than that of the restraint member.
  • a plurality of locations including at least two I-shaped attachments to be galvanized are firmly connected to each other with a restraint to form a pseudo-single body, In this state, molten M lead is applied.Even if each I-shaped structural member tries to deform by receiving the heat force in the molten zinc plating process, the deformation is suppressed due to the unpleasant single medullary body, and it is entangled and twisted. Such deformation can be significantly prevented or reduced.
  • the conventional method is achieved by connecting the 3 ⁇ 43 ⁇ 4 of the I-Lin-Zu-Yon, which is required to prevent these deformations more strongly than other parts, as the force joint part as soon as these deformations occur most immediately. It is possible to reduce the unfavorable 3 deformations that are not possible with T to within the allowable range. In addition, by connecting the middle part of the long I-shape, the ⁇ Nobugami deformation can be further suppressed.
  • the twist of the f-shaped fitting is extremely small, and at least two of the I-shaped fitting forces are connected to each other by the tethers at intervals of eagerness. It can be stored in an upright stable state and can be used for gi &, etc ..
  • Table 5 summarizes and summarizes the advantages of the JiW loading and other methods for preventing deformation in the hot-dip galvanizing process of the present invention. 5 Advantages of the present invention Advantages over conventional methods Improve transport efficiency by upright transport Improve sideways transport

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  • Body Structure For Vehicles (AREA)

Abstract

L'invention vise à éviter l'apparition de déformations telles que l'expansion, la torsion et le fléchissement lors de la galvanisation à chaud d'un élément structural en forme de I. Lorsque cet élément structural présentant des rebords (2) en haut et en bas d'une bande (1) doit être galvanisé à chaud, deux éléments structuraux en forme de I sont juxtaposés avec des bandes (1) verticales, de même une pluralité de parties comportant des extrémités latérales opposées des éléments sont assemblées par un élément de liaison (3) aux bandes (1) et aux rebords (2) de manière à former une structure pseudo-simple. Les éléments sont galvanisés à chaud dans ces conditions.
PCT/JP2002/005122 2001-05-25 2002-05-27 Procede de galvanisation a chaud d'un element structural en forme de i WO2002097153A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2001-156403 2001-05-25
JP2001156403A JP3260353B1 (ja) 2001-05-25 2001-05-25 Ｉ形構造部材の溶融亜鉛メッキ方法
JP2002041431A JP2003239058A (ja) 2002-02-19 2002-02-19 Ｉ形構造部材の溶融亜鉛メッキ方法
JP2002-41431 2002-02-19

Publications (1)

Publication Number Publication Date
WO2002097153A1 true WO2002097153A1 (fr) 2002-12-05

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Application Number Title Priority Date Filing Date
PCT/JP2002/005122 WO2002097153A1 (fr) 2001-05-25 2002-05-27 Procede de galvanisation a chaud d'un element structural en forme de i

Country Status (1)

Country Link
WO (1) WO2002097153A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58100666A (ja) * 1981-12-09 1983-06-15 Nippon Kyoryo Kk 鋼構造物等の溶融メツキにおける冷却方法及びその装置
JPS61143591A (ja) * 1984-12-14 1986-07-01 Mitsubishi Heavy Ind Ltd 溶接構造物の鍍金時歪発生防止法
JPH0432542A (ja) * 1990-05-29 1992-02-04 Nikko Aen Kk 着色亜鉛めっき用治具

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58100666A (ja) * 1981-12-09 1983-06-15 Nippon Kyoryo Kk 鋼構造物等の溶融メツキにおける冷却方法及びその装置
JPS61143591A (ja) * 1984-12-14 1986-07-01 Mitsubishi Heavy Ind Ltd 溶接構造物の鍍金時歪発生防止法
JPH0432542A (ja) * 1990-05-29 1992-02-04 Nikko Aen Kk 着色亜鉛めっき用治具

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