CN113102950A - Special-shaped section hot galvanizing stiffening plate and manufacturing process thereof - Google Patents
Special-shaped section hot galvanizing stiffening plate and manufacturing process thereof Download PDFInfo
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- CN113102950A CN113102950A CN202110404386.2A CN202110404386A CN113102950A CN 113102950 A CN113102950 A CN 113102950A CN 202110404386 A CN202110404386 A CN 202110404386A CN 113102950 A CN113102950 A CN 113102950A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/12—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to investigating the properties, e.g. the weldability, of materials
- B23K31/125—Weld quality monitoring
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Abstract
The invention provides a hot galvanizing stiffening plate with a special-shaped cross section and a manufacturing process thereof, relating to the technical field, and comprising an ear plate, a hole formed on the ear plate, a flitch plate and a hole formed on the flitch plate; the aperture of the ear plate is the same as that of the flitch plate; the front and back surfaces of the ear plate are respectively covered with a pasting plate, and the hole of the pasting plate and the hole of the ear plate are positioned on a central line; the ear plate is irregular and irregular. The flitch and the lug plate adopt a plate welding combination structure, wherein an outer groove is formed on the outer edge of the flitch, an inner groove is formed on the inner ring of the flitch, an outer ring welding line is formed on the outer groove, and an inner side welding line is formed on the inner groove. The connection between the lug plate and the flitch plate is reliable, the quality problems of cracking, bulging deformation and the like of the lug plate and the flitch plate caused by large heat provided by a hot galvanizing process are effectively prevented, the quality of the manufacturing process is controllable, the working efficiency is improved, the product effect is excellent, the corresponding design precision requirement can be met, and the market demand is met.
Description
Technical Field
The invention relates to a special-shaped section hot galvanizing stiffening plate and a manufacturing process thereof, belonging to the technical field of building steel structures.
Background
Along with the modern development of society, many landmark buildings are built by steel structures, the steel structure products generally need to be safely serviced for decades under the load condition, and reinforcement is needed in some key areas to achieve better design performance. In order to avoid the influence of corrosion on the structure in the natural environment, the areas are subjected to necessary anticorrosion operation, and hot galvanizing is one of the best anticorrosion modes. The hot galvanizing layer can enhance the corrosion resistance of the material and improve the mechanical property of the material. However, in the hot galvanizing process of the reinforcing plate, due to the characteristics of the hot galvanizing process, quality problems such as warping deformation of the reinforcing plate, cracking of the reinforcing plate, bulging and the like can be caused, and how to solve the defects of the reinforcing plate and the hot galvanizing together is the key for fusing.
The otic placode of current steel construction stiffening plate, the flitch is behind the trompil, generally adopts along flitch a week to adopt overlap joint fillet weld to enclose the mode of welding and connect both, is feasible in some projects, like plate cross-section rule, when the stiffening plate cross-section is less, the intensity of overlap joint fillet weld at this moment can bond otic placode and flitch, makes the whole atress trend of combination plate unanimous, guarantees not to go wrong at hot-galvanize in-process. However, in wider practical engineering application, the area of the reinforcing plate is 6 to 8 times of that of the common specification, the experience is not universal, the effective action area of the lap fillet weld is not enough, the connection strength between the flitch and the lug plate in the reinforcing plate can not be guaranteed, the reinforcing plate is influenced by various factors such as the lug plate, burrs on the surface of the flitch plate, floating rust, the flatness of the plate and the like, a gap with a certain height is always formed between the two plates, the lap fillet weld can only act on the area nearby the lap fillet weld, the middle part of the reinforcing plate is in a free state, stress is released by heating in the hot galvanizing process, the reinforcing plate is bulged and deformed, the deformation can generate prying force on the lap fillet weld, the original balance state is damaged, the weld is cracked, zinc liquid flows into the gap, but the blockage of the fillet weld of the outer ring can not flow out smoothly, deposits are formed after cooling, and the fastening effect similar to a wedge is achieved, the repair of the plate is difficult, and the designed zero clearance requirement cannot be met. The quality problems are deviated from the design requirements of the reinforcing plate, and an appropriate method is urgently needed to solve the problem that the lug plate and the flitch plate in the existing special-shaped cross section reinforcing plate component are effectively connected in the hot galvanizing process.
The present application was made based on this.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides the special-shaped section hot-dip galvanized stiffening plate which is simple in process, standard in flow, strong in operability and suitable for mass operation in factories and the manufacturing process thereof.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a hot galvanizing stiffening plate with a special-shaped section comprises an ear plate, a hole formed in the ear plate, a flitch plate and a hole formed in the flitch plate; the aperture of the ear plate is the same as that of the flitch plate; the front and back surfaces of the ear plate are respectively covered with a pasting plate, and the hole of the pasting plate and the hole of the ear plate are positioned on a central line; the ear plate is irregular and irregular.
As a preferred scheme of the present invention, the flitch and the ear plate adopt a plate welding combination structure, wherein an outer edge of the flitch is provided with an outer groove, an inner groove is formed on an inner ring of a hole of the flitch, the outer groove forms an outer ring welding seam, and the inner groove forms an inner hole side welding seam.
More preferably, a plurality of plug welding holes are distributed on the front and back flitch plates, and the depth of each plug welding hole is 1/2 which is greater than the thickness of the flitch plate but less than the thickness of the lug plate.
More preferably, the plug welding holes are uniformly distributed in at least two circles in the circumferential direction, and the distance between every two adjacent plug welding holes is not less than 200mm in the circumferential direction; in the radial direction, the distance between every two adjacent plug welding holes is not less than 100 mm.
More preferably, the angle between the outer groove and the inner groove is 45 degrees, and the height of the groove is the thickness of the flitch.
In another preferred embodiment of the present invention, the flitch plate and the lug plate are in a milling integrated structure or a die casting integrated structure.
The manufacturing process of the special-shaped section hot galvanizing stiffening plate in the first preferred scheme comprises the following steps:
step one, blanking of a reinforcing plate: blanking and perforating ear plates, blanking and perforating flitch plates;
step two, groove opening: grooves are formed on the outer side of the flitch and the inner side of the flitch hole, and a hole inner side welding line and an outer ring welding line are formed;
thirdly, marking the plug welding holes on the surfaces of the lug plate and the flitch plate;
fourthly, forming plug welding holes on the ear plates and the pasting plates along the marked lines;
fifthly, cleaning the surface of the plate;
step six, assembling and positioning the ear plates and the flitch plates;
step seven, plug welding hole welding;
step eight, grinding the plug welding hole welding seam;
welding the inner side of the hole of the flitch;
step ten, welding the outer ring weld joint of the flitch;
step eleven, performing surface treatment on the welding seam to obtain a reinforcing plate assembly;
and step twelve, performing subsequent quality inspection work.
More preferably, the welding adopts closed welding and full welding, and the height of a welding leg is not less than 0.7 of the thickness of the flitch plate; the welding method adopts sectional back welding; and controlling the temperature between the welding lines not to exceed 200 ℃ in the welding process, and measuring by using an infrared temperature measuring pen, wherein the thickness of each welding line is not more than 3 mm.
More preferably, in the sixth step, the ear plate and the flitch plate are fastened and assembled by using a C-shaped clamp to ensure that the gap between the ear plate and the flitch plate reaches 0, and then spot welding reinforcement is performed, wherein the height Hf =6mm of a spot welding leg, and the length of a welding line is 30-40 mm; after the assembly is finished, the gap between the ear plate and the reinforcing flitch is measured, and the gap deviation between the three plates is ensured to be less than 0.5mm so as to ensure that the three plates are tightly attached.
More preferably, the step twelve sequentially comprises
Knocking the steel seal;
quality inspection, namely, the qualified products enter the next link, and the unqualified products are repaired;
cleaning, namely pickling the qualified reinforcing plate assembly to wash off impurities on the surface of the assembly;
hot galvanizing, performing assistant galvanizing, and performing full dipping treatment, namely slowly dipping the reinforcing plate assembly into a zinc liquid pool, wherein the temperature of the zinc liquid is 430-450 ℃;
hot galvanizing quality inspection, wherein qualified products enter the next link, and hot galvanizing is carried out on unqualified products again;
steel seal information transplantation;
machining and boring, namely machining and boring a hole in the middle of the reinforcing plate by using a numerical control drilling machine, ensuring the coaxiality of the lug plate and the three hole positions of the flitch plates on the two sides, and controlling the deviation of the coaxiality to be 0-0.1 mm;
and (4) checking the boring quality, mounting the qualified product and other components, and re-boring the unqualified product.
The invention can realize the following technical effects:
(1) the key point of the invention is the manufacturing process of the stiffening plate before the hot galvanizing process, which aims to prevent the quality problems of cracking, bulging, deformation and the like of the stiffening plate in the hot galvanizing process.
(2) By means of the methods of forming the plug welding hole, welding the inner groove, controlling the welding process, marking and transplanting the characteristic information and the like, the connection strength of the ear plate and the flitch in a unit area is improved, the quality problems of cracking, bulging deformation and the like of the ear plate and the flitch caused by large heat provided by a hot galvanizing process are effectively prevented, the quality of the manufacturing process is controllable, the working efficiency is improved, the product effect is good, the corresponding design precision requirement can be met, and the market demand is met.
Drawings
FIG. 1 is a flow chart of a manufacturing process of a hot-dip galvanized stiffening plate with a special-shaped cross section in example 1;
FIG. 2 is a plan view of the overall structure of the reinforcing plate for hot-dip galvanized steel with a special-shaped cross section in example 1;
FIG. 3 is a cross-sectional view (before welding) of the hot-dip galvanized stiffening plate with a special-shaped cross section in example 1;
FIG. 4 is a cross-sectional view (after welding) of the hot-dip galvanized stiffening plate with a special-shaped cross section in example 1;
FIG. 5 is a schematic view of the sectional desoldering of the hot-dip galvanized stiffening plate with a special-shaped cross section in example 1.
Description of the labeling: the welding process comprises the following steps of 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10.
Detailed Description
In order to make the technical means and technical effects achieved by the technical means of the present invention more clearly and more perfectly disclosed, the following embodiments are provided, and the following detailed description is made with reference to the accompanying drawings:
example 1
As shown in fig. 2 to 5, the hot-dip galvanized stiffening plate with a special-shaped cross section of the present embodiment includes an ear plate, a hole formed on the ear plate, a flitch plate, and a hole formed on the flitch plate; the aperture of the ear plate is the same as that of the flitch plate; the front and back surfaces of the ear plate are respectively covered with a pasting plate, and the hole of the pasting plate and the hole of the ear plate are positioned on a central line; the outer edge of the flitch is provided with an outer groove, the inner ring of the hole of the flitch is provided with an inner groove, the outer groove forms an outer ring welding line, and the inner groove forms an inner side welding line of the hole.
In the preferred embodiment, a plurality of plug welding holes are distributed on the front and back flitch plates, and the depth of each plug welding hole is 1/2 which is greater than the thickness of the flitch plate but less than the thickness of the lug plate.
Preferably, the plug welding holes are uniformly distributed at least two circles in the circumferential direction, and the distance between every two adjacent plug welding holes is 200mm in the circumferential direction. In the radial direction, the distance between every two adjacent plug welding holes is 100 mm.
In the preferred embodiment, the ear plate is irregularly shaped.
Preferably, in the embodiment, the angle between the outer groove and the inner groove is 45 degrees, and the height of the groove is the thickness of the flitch;
as shown in fig. 1, the process for manufacturing the hot-dip galvanized stiffening plate with the special-shaped cross section in the embodiment includes the following specific steps:
step one, blanking of a reinforcing plate: blanking and perforating ear plates, blanking and perforating flitch plates;
the reinforcing plate is an assembly of an ear plate (figure 2 number 1) and a flitch plate (figure 2 number 2).
Firstly, blanking an ear plate and a flitch, taking a deepened part figure as a standard (determining a cutting aperture phi 1), wherein the flitch is in a special shape (irregular shape, ellipse-like shape and the like), the cross section size of the flitch is 200 x 300-1200 x 1500mm and the like, a hole phi 1 (corresponding to a later boring hole phi 2, the boring hole phi 2-the cutting aperture phi 1= 5-15 mm, the specific difference is determined according to different plate thicknesses, and the phi 1 and the phi 2 are numbered 10 in the attached drawing 2) needs to be formed by numerical control blanking, the plate is accurately cut, the corresponding cutting gas pressure, the walking speed and the cutting type mouth are matched according to different plate thicknesses in the cutting process, and the cutting quality is observed and fine-adjusted during cutting. The serial number is transplanted at the unloading completion back and according to the part picture, the inspection cutting quality, and the cutting deckle edge of polishing transplants the panel color code, later transports to the dress and welds team and group.
Step two, groove opening: grooves are formed on the outer side of the flitch and the inner side of the flitch hole, and a hole inner side welding line and an outer ring welding line are formed;
and rechecking the incoming material information by the welding team, forming a flitch groove according to process guidance after the incoming material information is correct, forming an inner groove (number 3 in the attached drawing 3) on the outer ring of the flitch, forming an inner groove (number 4 in the attached drawing 3) on the inner ring of the flitch hole, wherein the groove angle is 45 degrees, and the groove height is the plate thickness.
Thirdly, marking the plug welding holes on the surfaces of the lug plate and the flitch plate;
and plug welding holes (number 5 in figure 3) are formed after positioning, the plug welding holes are 100 × 25mm in size and 25-30 mm in depth, the number of the plug welding holes is 6+8 (6 inner rings and 8 inner rings), and the plug welding holes are uniformly distributed along the plane of the plate. The principle of arrangement is as follows: in the circumferential direction, the distance between every two adjacent plug welding holes is not less than 200 mm. In the radial direction, the distance between every two adjacent plug welding holes is not less than 100 mm. The groove angle and the groove depth are noticed when the groove is opened.
Fifthly, cleaning the surface of the plate;
and after the groove cutting and the plug welding hole are formed, removing dust, rust, oil stain, oxide skin, cutting slag and other impurities on the contact surface and the bevel surface of the two plates.
Fourthly, forming plug welding holes on the ear plates and the pasting plates along the marked lines;
the position line of the solder via is formed by using stone strokes in advance.
Step six, assembling and positioning the ear plates and the flitch plates;
the C-shaped clamp is used for fastening and assembling the lug plate and the flitch plate so as to ensure that the gap between the lug plate and the flitch plate reaches 0, and then spot welding reinforcement is carried out, wherein the height Hf =6mm of a spot welding leg, and the length of a welding line is 30-40 mm. After the assembly is finished, the gap between the ear plate and the reinforcing flitch is measured, the gap deviation between the 3 plates is ensured to be less than 0.5mm, so that the 3 plates are tightly attached, and then formal welding is carried out.
Step seven, plug welding hole welding;
and (4) rechecking the cleaning quality of the to-be-welded interval and the cleaning quality within 50mm of the interval outside two ends of the to-be-welded interval before formal welding. During welding, according to the material quality of steel, matched welding materials and welding methods are selected, and a reasonable welding sequence and a small-current multi-layer multi-pass welding process are adopted. And (4) welding the plug welding holes in the middle parts of the flitch and the lug plate in advance (the number of figure 4 is 8).
Step eight, grinding the plug welding hole welding seam;
and after welding, the plug welding hole is ground flat by adopting an angle welder.
Welding the inner side of the hole of the flitch;
welding seams (number 7 in figure 4) between the pasting plate and the middle hole of the ear plate are welded,
step ten, welding the outer ring weld joint of the flitch;
and then welding a welding seam (figure 4 number 6) of the outer ring of the flitch, wherein closed welding and full welding are adopted during welding, the height of a welding leg is not less than 0.7t, and t is the thickness of the flitch plate. The sealing welding is to avoid the gas in the tiny gap between the lug plate and the flitch plate from escaping in the hot galvanizing process, which affects the hot galvanizing quality, such as galvanizing pores, yellow water on the surface of a zinc layer, and the like. The welding method adopts the sectional back welding (figure 5, number 11), which can effectively reduce the welding stress. And controlling the temperature between the welding lines not to exceed 200 ℃ in the welding process, and measuring by using an infrared temperature measuring pen, wherein the thickness of each welding line is not more than 3 mm. The aim of finally controlling welding stress and deformation is achieved by controlling the welding process.
Step eleven, performing surface treatment on the welding seam to obtain a reinforcing plate assembly;
finally, sundries such as splashes around the weld joint are cleaned, and the quality and appearance of the component are guaranteed.
After cleaning, the steel seal (figure 2 number 9) is knocked at the specific position of the reinforcing plate, the steel seal accurately expresses the member number, information such as teams and groups is manufactured, quality requirements are clear, the depth is uniform, and the information is correct, so that the uniqueness of the plate is ensured, and the condition that a large number of similar plates cannot be distinguished after hot galvanizing is avoided (small difference exists between each plate).
And step twelve, performing subsequent quality inspection work.
Quality inspection, namely, the qualified products enter the next link, and the unqualified products are repaired;
cleaning, namely pickling the qualified reinforcing plate assembly to remove impurities such as rust, oxides, oil stains and the like on the surface of the assembly;
and hot galvanizing, then carrying out assistant plating and hot galvanizing procedures, slowly immersing the reinforcing plate assembly into a zinc liquid pool, wherein the temperature of the zinc liquid is 430-450 ℃, and carrying out full immersion treatment, so that the cracking of the plate caused by different rates of expansion with heat and contraction with cold in different areas of the same block assembly due to overheating in local areas is avoided. The hot galvanizing time is determined by the steel plate material, the zinc liquid component, the zinc liquid temperature and other factors.
Hot galvanizing quality inspection, namely inspecting the hot galvanizing quality (the appearance of the galvanized zinc and the thickness of a zinc film are 80-100 mu m, and measuring by using a thickness gauge, wherein the thickness of the zinc film depends on the design requirement), enabling qualified products to enter the next link, and performing hot galvanizing on unqualified products again;
and (4) transplanting the steel seal information, transplanting the steel seal information after the quality detection is qualified, and rewriting by using a marking pen so as to facilitate subsequent identification.
And (3) boring by machining, machining and boring a hole site phi 2 (number 10 in figure 2) in the middle of the reinforcing plate by using a numerical control drilling machine after hot galvanizing is qualified, ensuring the coaxiality of three hole sites of the lug plate and the flitch plates on the two sides, and controlling the deviation of the coaxiality to be 0 to +0.1 mm.
And (4) checking the boring quality, measuring the size by using a vernier caliper after the manufacture is finished, meeting the corresponding quality control requirement, installing other components, and boring the unqualified product again.
The hot dip galvanized stiffener proposed in example 1 of the present invention was produced by a lamination method (T1 + T2+ T3, T1, T3 are thicknesses of the stiffener patch, and T2 is a thickness of the middle lug), but other production methods are possible, such as example 2 and example 3.
Example 2
The final purpose can also be achieved by milling, i.e. pre-milling the surrounding unwanted material out of a whole plate (plate thickness T = T1+ T2+ T3), hot galvanizing, and finally machining and boring.
Example 3
The solid article is manufactured by a casting method and adopting a die, and finally the solid article is finished by finishing treatment, and then the solid article is processed by the working procedures of hot galvanizing, boring by machining and the like, so that the final aim can be achieved.
The stiffening plate and the method of the embodiment 2 and the embodiment 3 can also realize the effect of the stiffening plate, but the production cost is higher than that of the embodiment in comparison, and the manufacturing period is long.
The above description is provided for the purpose of further elaboration of the technical solutions provided in connection with the preferred embodiments of the present invention, and it should not be understood that the embodiments of the present invention are limited to the above description, and it should be understood that various simple deductions or substitutions can be made by those skilled in the art without departing from the spirit of the present invention, and all such alternatives are included in the scope of the present invention.
Claims (8)
1. A hot dip galvanizing stiffening plate with a special-shaped section is characterized in that: comprises an ear plate, a hole arranged on the ear plate, a pasting plate and a hole arranged on the pasting plate; the aperture of the ear plate is the same as that of the flitch plate; the front and back surfaces of the ear plate are respectively covered with a pasting plate, and the hole of the pasting plate and the hole of the ear plate are positioned on a central line; the ear plate is irregular and irregular; the flitch and the lug plate adopt a plate welding combined structure, a milling integrated structure or a die casting integrated structure; in the structure of the welding combination, an outer groove is formed in the outer edge of the flitch, an inner groove is formed in the inner ring of the flitch, an outer ring welding seam is formed by the outer groove, and an inner side welding seam is formed by the inner groove.
2. The hot-dip galvanized stiffening plate with a special-shaped section as set forth in claim 1, characterized in that: a plurality of plug welding holes are uniformly distributed on the flitch on the front side and the back side, and the depth of each plug welding hole is 1/2 which is greater than the thickness of the flitch but less than the thickness of the lug plate.
3. The hot-dip galvanized stiffening plate with a special-shaped section as set forth in claim 2, characterized in that: at least two circles of plug welding holes are uniformly distributed in the circumferential direction, and the distance between every two adjacent plug welding holes is not less than 200mm in the circumferential direction; in the radial direction, the distance between every two adjacent plug welding holes is not less than 100 mm.
4. The hot-dip galvanized stiffening plate with a special-shaped section as set forth in claim 1, characterized in that: the angle between the outer groove and the inner groove is 45 degrees, and the height of the groove is the thickness of the flitch.
5. The process for manufacturing the hot-dip galvanized stiffening plate with the special-shaped section according to any one of the claims 1 to 4, wherein the flitch plate and the lug plate adopt a plate welding combination structure, and the process comprises the following steps:
step one, blanking of a reinforcing plate: blanking and perforating ear plates, blanking and perforating flitch plates;
step two, groove opening: grooves are formed on the outer side of the flitch and the inner side of the flitch hole, and a hole inner side welding line and an outer ring welding line are formed;
thirdly, marking the plug welding holes on the surfaces of the lug plate and the flitch plate;
fourthly, forming plug welding holes on the ear plates and the pasting plates along the marked lines;
fifthly, cleaning the surface of the plate;
step six, assembling and positioning the ear plates and the flitch plates;
step seven, plug welding hole welding;
step eight, grinding the plug welding hole welding seam;
welding the inner side of the hole of the flitch;
step ten, welding the outer ring weld joint of the flitch;
step eleven, performing surface treatment on the welding seam to obtain a reinforcing plate assembly;
and step twelve, performing subsequent quality inspection work.
6. The manufacturing process of the special-shaped section hot galvanizing stiffening plate according to claim 5, characterized in that: the welding adopts closed welding and full welding, and the height of a welding leg is not less than 0.7 of the thickness of the flitch plate; the welding method adopts sectional back welding; and controlling the temperature between the welding lines not to exceed 200 ℃ in the welding process, and measuring by using an infrared temperature measuring pen, wherein the thickness of each welding line is not more than 3 mm.
7. The manufacturing process of the special-shaped section hot galvanizing stiffening plate according to claim 5, characterized in that: in the sixth step, the ear plate and the flitch plate are fastened and assembled by using a C-shaped clamp to ensure that the gap between the ear plate and the flitch plate reaches 0, and then spot welding reinforcement is carried out, wherein the height Hf =6mm of a spot welding leg, and the length of a welding line is 30-40 mm; after the assembly is finished, the gap between the ear plate and the reinforcing flitch is measured, and the gap deviation between the three plates is ensured to be less than 0.5mm so as to ensure that the three plates are tightly attached.
8. The manufacturing process of the special-shaped section hot galvanizing stiffening plate according to claim 5, characterized in that: in the twelfth step, sequentially comprise
Knocking the steel seal;
quality inspection, namely, the qualified products enter the next link, and the unqualified products are repaired;
cleaning, namely pickling the qualified reinforcing plate assembly to wash off impurities on the surface of the assembly;
hot galvanizing, performing assistant galvanizing, and performing full dipping treatment, namely slowly dipping the reinforcing plate assembly into a zinc liquid pool, wherein the temperature of the zinc liquid is 430-450 ℃;
hot galvanizing quality inspection, wherein qualified products enter the next link, and hot galvanizing is carried out on unqualified products again;
steel seal information transplantation;
machining and boring, namely machining and boring a hole in the middle of the reinforcing plate by using a numerical control drilling machine, ensuring the coaxiality of the lug plate and the three hole positions of the flitch plates on the two sides, and controlling the deviation of the coaxiality to be 0-0.1 mm;
and (4) checking the boring quality, mounting the qualified product and other components, and re-boring the unqualified product.
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| EP1243768A2 (en) * | 2001-03-21 | 2002-09-25 | Calsonic Kansei Corporation | Method of fabricating a catalyst converter |
| CN102151942A (en) * | 2011-03-17 | 2011-08-17 | 山东矿机集团股份有限公司 | Hydraulic support self-preheating and automatic step-by-step welding process |
| CN202687735U (en) * | 2012-04-13 | 2013-01-23 | 中国化学工程第六建设有限公司 | Adjustable hoisting tool |
| CN204702389U (en) * | 2015-01-22 | 2015-10-14 | 中交第二航务工程局有限公司 | A kind of spreader assembly for steel structural rod piece lifting operation |
| CN106425316A (en) * | 2016-11-18 | 2017-02-22 | 淮北智淮科技有限公司 | Double-lug plate for hinging work-pieces and manufacturing technology thereof |
| CN206336922U (en) * | 2016-12-30 | 2017-07-18 | 徐州徐工挖掘机械有限公司 | A kind of Heavy Equipment-hoisting shackle structure |
| CN109505867A (en) * | 2018-11-22 | 2019-03-22 | 中联重科股份有限公司 | Axle sleeve structure |
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