CN114260709A - Production line and production method for steel cross beam of railway sidewalk - Google Patents
Production line and production method for steel cross beam of railway sidewalk Download PDFInfo
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- CN114260709A CN114260709A CN202111333256.0A CN202111333256A CN114260709A CN 114260709 A CN114260709 A CN 114260709A CN 202111333256 A CN202111333256 A CN 202111333256A CN 114260709 A CN114260709 A CN 114260709A
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Abstract
The invention relates to the technical field of bridge engineering, in particular to a production line and a production method of a steel cross beam of a railway sidewalk. The production line comprises a laser cutting device, a bending device, a welding device, a shot blasting rust removal device, a zinc impregnation device, a passivation device and a sealing device; the laser cutting device is used for cutting the outline and the open pore of the raw material steel plate according to preset parameters; the bending device comprises a bending die, and the bottom plate is formed in the bending die in a punching mode; the welding device comprises a welding robot workstation, a stud welding machine and a secondary welding device; the welding robot workstation is used for welding steel plates; the stud welding machine is used for welding the cylindrical head welding nail and the top plate; and the two weld protectors are used for welding angle steel and the top plate. The laser cutting profile and the hole opening guarantee the cutting precision and the cutting efficiency, different welding tools are adopted for different welding characteristics, and the positioning device and the welding tool are matched for use, so that the welding positioning accuracy and the welding positioning quality are guaranteed.
Description
Technical Field
The invention relates to the technical field of bridge engineering, in particular to a production line and a production method of a steel cross beam of a railway sidewalk.
Background
The sidewalk steel beam is a steel structure product of a railway T-beam auxiliary bridge deck system and is mainly used for being connected with railway T-beam boundary beam pre-embedded T-shaped steel. U-shaped grooves and cable bridge cover plates are placed at the upper ends of the steel cross beams, and steel cross beam angle steel is connected with upright post angle steel to form a bridge deck system auxiliary sidewalk railing system for people to walk. The method is widely applied to railways.
The principle of the corrosion prevention process of the steel beam for the domestic railway is 'multi-element alloy co-permeation, passivation treatment and sealing treatment', and the process flow is as follows: cutting a steel plate → bending → assembling and welding → performing shot blasting and rust removal → co-infiltrating of multi-element alloy → passivating → sealing. The steel beam steel plate cutting process mostly adopts a flame cutting mode, so that the cutting precision of the steel plate is not controlled strongly, and the assembly deformation is large; the production, assembly and welding process of the steel beam uses a manual welding mode, so that the welding deformation is large, the welding efficiency is low, and a large number of welding workers are involved; the steel beam passivation process adopts a soaking type passivation process, and the passivation solution adopts a hexavalent chromium-containing passivation solution, so that the investment of the passivation solution is too large, and the environmental pollution is great;
in conclusion, the steel beam in the prior art has the disadvantages of rough processing, low production efficiency, low quality, low automation level of the whole production process, more production workers, low efficiency and serious environmental pollution.
Disclosure of Invention
The invention aims to: aiming at the problem that in the prior art, the quality is difficult to ensure that the production efficiency is low when the steel cross beam is produced, the production line of the railway steel cross beam is provided. The production line combines laser cutting and welding, and the contour and the opening are cut and formed simultaneously during laser cutting, so that the positioning precision and quality are greatly improved, the production of a welding procedure is facilitated, and the production efficiency is improved; the production efficiency can be matched with a zinc impregnation process for batch treatment, continuous production of zinc impregnation is realized, and further the whole product quality and the production efficiency are greatly improved.
In order to achieve the purpose, the invention adopts the technical scheme that:
a railway sidewalk steel beam production line comprises a laser cutting device, a bending device, a welding device, a shot blasting and rust removing device, a zinc impregnation device, a passivation device and a sealing device;
the laser cutting device is used for cutting the outline and the open pore of the raw material steel plate according to preset parameters to obtain a bottom plate, a supporting plate and a top plate;
the bending device comprises a bending die, and the bottom plate is formed in the bending die in a punching mode;
the welding device comprises a welding robot workstation, a stud welding machine and a secondary welding device; the welding robot workstation is used for welding the bent bottom plate, the support plate and the top plate; the stud welding machine is used for welding the cylindrical head welding nail and the top plate; the second welding protection device is used for welding angle steel and a top plate;
the shot blasting rust removal device comprises a through type shot blasting machine and is used for carrying out rust removal treatment on the welded semi-finished product;
the zincizing device comprises a tetragonal zincizing furnace and is used for carrying out zincizing treatment on the derusted semi-finished product;
the passivation device comprises a spray type passivation device, a spray type passivation device and a passivation device, wherein the spray type passivation device comprises a shot blasting cleaning chamber, a passivation tank, a cleaning tank and a drying chamber and is used for passivating the semi-finished product subjected to zinc impregnation;
the sealing device comprises a spraying device and a drying device, wherein the spraying device is used for spraying weather-resistant paint sealing liquid on the passivated semi-finished product; and the drying device is used for drying the sprayed semi-finished product to obtain a finished steel beam product.
Through using laser cutting device, guaranteed the cutting profile precision and the trompil precision of bottom plate, backup pad, roof, through bending device, to bottom plate stamping forming in the mould, guaranteed the cutting precision and the quality of three steel sheet, and then provide basic guarantee for the welding. When welding, to the characteristics that the steel sheet is two-sided welding, the welding of cylinder head welding nail, angle steel different during welding, adopt different welding tools, the positioning accuracy when having further guaranteed the welding has promoted welding quality. After welding is finished, a zinc impregnation process is carried out, so that the influence of a coating on the welding quality is avoided. In addition, by adopting laser cutting and three different welding tools and positioning tools, the production efficiency is greatly improved, and then the follow-up procedures such as zinc impregnation can be continuously carried out in large batch, the production efficiency of the whole production line is greatly improved, the labor is also saved, and the production cost is reduced.
As a preferable scheme of the invention, the laser cutting device is a numerical control laser cutting machine. The bending device is a hydraulic plate bending machine.
As a preferable scheme of the invention, the welding device further comprises a welding positioning turnover device, and the welding robot workstation is matched with the welding positioning turnover device and can continuously weld the two sides of the steel beam and the steel plate. Aiming at the characteristics of the welding robot workstation used for the double-sided welding of the steel plate, the welding positioning turnover device is used in a matched mode, so that the welding efficiency and the welding quality are improved.
As a preferred scheme of the invention, the welding device further comprises a welding tool, and the welding tool is used for positioning the welding positions of the round column head welding nails and the angle steels. The welding tool comprises four positioning grooves and a positioning square groove. Different characteristics welding frock when welding to cylinder head welding nail, angle steel welding can be to the solder joint accurate positioning, also does benefit to and promotes welding efficiency.
As a preferred scheme of the invention, when the steel beams are arranged in the zincizing device, the zincizing device comprises a plurality of arrangement units which are arranged in sequence, and each arrangement unit comprises a first steel beam and a second steel beam; the first steel cross beam is arranged rightly, the second steel cross beam is arranged inversely, and the narrow end of the first steel cross beam extends into the wide end of the second steel cross beam; the narrow end of the second steel beam extends into the wide end of the first steel beam. The space between the bottom plate and the top plate is fully utilized by the matching mode of righting and inverting the two steel cross beams in each arrangement unit; and a space between the angle steels of two adjacent steel cross beams. By adopting the arrangement mode, more steel beams can be arranged in unit volume, and due to dense arrangement, a plurality of steel beams are combined into a whole in the 360-degree overturning process of the zinc impregnation device, and a single steel beam is not easy to shake. The combination mode of each steel beam and other steel beams around is basically consistent, and the zinc impregnation technological parameters are easier to adjust during zinc impregnation, so that the product quality of each steel beam is ensured to be consistent.
As a preferable scheme of the invention, a separation dust remover is arranged above the zincizing device, and the separation dust remover comprises a separation cover which can be covered on the zincizing device.
As a preferable scheme of the invention, the passivating device and the closing device are connected into a passivating-closing suspension chain production line through a suspension chain production line. The passivation-closed suspension chain production line comprises a feeding area, an automatic shot blasting cleaning chamber, a rinsing tank, a passivation drying chamber, a passivation tank, a passivation drying chamber, a closed spraying station, a closed drying chamber and a discharging area, wherein the feeding area, the automatic shot blasting cleaning chamber, the rinsing tank, the passivation drying chamber, the closed spraying station, the closed drying chamber and the discharging area run along the suspension chain production line.
As a preferable scheme of the invention, the shot blasting and rust removing device further comprises a dust collecting and processing device, and an air inlet of the dust collecting and processing device is communicated with discharge ports of the shot blasting and rust removing device, the laser cutting device and the welding device.
The invention also provides a production method of the steel cross beam of the railway sidewalk, which comprises the following steps,
s1, cutting holes on the steel plate, and cutting and forming the raw material steel plate according to preset parameters by using a laser cutting machine to obtain a bottom plate, a supporting plate and a top plate; bending and molding the bottom plate to obtain a bent bottom plate;
s2, assembling and welding, namely welding the bent bottom plate, the bent support plate and the bent top plate; then, welding a cylindrical head welding nail and a steel cross beam to the top plate; obtaining a welded steel beam;
s3, performing shot blasting rust removal, namely performing rust removal on the welded steel beam, wherein the rust removal grade is more than grade Sa 3;
s4, zinc impregnation separation, namely performing multi-element alloy co-impregnation by using a tetragonal zinc impregnation furnace, and after the co-impregnation is finished, replacing a separation cover and separating by using a separation dust remover;
s5, passivating, namely, sequentially carrying out ash removal and dust removal, passivating, washing, drying and cooling on the galvanized steel beam;
and S6, sealing, namely spraying the passivated steel beam with water-based weather-resistant paint sealing liquid, and drying to obtain a steel beam finished product.
In the preferred embodiment of the present invention, in the step S2 of assembly welding, the bottom plate, the support plate, and the top plate are positioned by a welding positioning and reversing device.
In the preferred scheme of the invention, in the step S2 of assembly welding, a welding tool is adopted to position the cylindrical head welding nail and position the angle steel.
As a preferable scheme of the invention, the step S5 passivation treatment and the step S6 closing treatment are both carried out by hanging the steel beam to be treated on a suspension chain production line.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the production line of the steel cross beam of the railway sidewalk, disclosed by the invention, combines laser cutting and welding, and cuts and shapes the outline and the opening during laser cutting, so that the positioning precision and the quality are greatly improved, the production of a welding process is facilitated, and the production efficiency is improved; the production efficiency can be matched with a zinc impregnation process for batch treatment, continuous production of zinc impregnation is realized, and further the whole product quality and the production efficiency are greatly improved. Laser cutting has promoted cutting accuracy, carries out welding process on this basis, and during the steel sheet welding, through the cooperation of welding position turning device and welding robot workstation, can carry out the two-sided welding of steel sheet in succession, fix a position cylinder head welding nail and angle steel through welding frock, very big improvement welding speed and welding position accuracy realize cylinder head welding nail and angle steel while fixed-position welding, improve welding efficiency. The process of welding first and then zinc impregnation also greatly ensures the welding quality.
2. According to the production method of the steel beam of the railway sidewalk, the steel plate is cut, blanked and perforated by using the numerical control laser cutting machine, so that the traditional drilling process can be replaced, and the cutting quality and the cutting efficiency of the steel plate are improved; the welding robot workstation is used for welding the steel beam to replace the traditional manual two-protection welding machine, so that the welding efficiency can be ensured, and the welding quality can be improved; the multi-element alloy co-cementation is carried out on the steel beam by using an electric heating square zincizing furnace, the forward and reverse arrangement units are adopted, and the zincizing quality can be fully ensured by adjusting the addition amount of a penetrating agent, the zincizing heat preservation temperature and the heat preservation time; the spray type passivation treatment mode is used for replacing the traditional immersion type passivation treatment to passivate the steel beam, so that the one-time investment and use amount of the passivation solution can be greatly saved, and the cost of the passivation solution is saved. By mastering key technology of steel beam production, key parameter clamping points in the production process of the steel beam are controlled, the production process is innovatively improved, the production efficiency of the steel beam can be greatly improved, the production quality is improved, and the production cost is reduced.
Drawings
Fig. 1 is a schematic structural view of a steel cross member of a railway sidewalk according to the present invention.
FIG. 2 is a schematic diagram of the construction of the passivated-closed suspension chain production line of the present invention.
Fig. 3 is a schematic structural diagram of a welding positioning turnover device in a steel beam production line of a railway sidewalk.
Fig. 4 is a schematic structural diagram of the welding positioning turnover device in the production line of the steel beam of the railway sidewalk, which is turned over by 180 degrees.
FIG. 5 is a schematic structural view of a welding tool in the production line of the steel cross beam of the railway sidewalk.
Fig. 6 is a schematic elevation view of a steel cross-beam for a railroad walkway of the present invention.
Fig. 7 is a schematic arrangement diagram of a steel beam a and a steel beam B in one arrangement unit of the present invention.
Fig. 8 is a schematic top view of fig. 7, namely a schematic top view of the arrangement of the steel beams a and B.
Fig. 9 is a schematic arrangement diagram of four arrangement units.
FIG. 10 is a process flow chart of the production method of the steel cross beam of the railway sidewalk.
Icon: 11-a base plate; 12-a support plate; 13-a top plate; 14-cylindrical head welding nail; 15-angle steel;
21-overturning the rack; 22-a movable plate; 221-positioning holes; 222-a fixed plate; 23-a limiting block; 231-connecting holes; 24-end panels; 241-card slot; 242-a pallet; 243-arresting plate; 25-side panel; 251-a limit edge; 26-a connector; 27-a positioning plate; 28-a pushing mechanism; 29-platen clamp, 31, 32, 33, 34-positioning groove; 35-positioning the square groove; a-a first steel beam; b-a second steel beam.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
A railway sidewalk steel beam production line comprises a laser cutting device, a bending device, a welding device, a shot blasting and rust removing device, a zinc impregnation device, a passivation device and a sealing device; the steel beam structure of the railway sidewalk is shown in fig. 1 and comprises a bent bottom plate 11, a support plate 12, a top plate 13, four cylindrical head welding nails 14 welded on the top plate and an angle steel 15.
The laser cutting device is used for cutting the outline and the open pore of the raw material steel plate according to preset parameters to obtain a bottom plate, a supporting plate and a top plate; the bending device comprises a bending die, and the bottom plate is formed in the bending die in a punching mode;
the welding device comprises a welding robot workstation, a stud welding machine and a secondary welding device; the welding robot workstation is used for welding the bent bottom plate, the support plate and the top plate; the stud welding machine is used for welding the cylindrical head welding nail and the top plate; the second welding protection device is used for welding angle steel and a top plate;
the shot blasting rust removal device comprises a through type shot blasting machine and is used for carrying out rust removal treatment on the welded semi-finished product;
the zincizing device comprises a tetragonal zincizing furnace and is used for carrying out zincizing treatment on the derusted semi-finished product;
the passivation device comprises a spray type passivation device, a spray type passivation device and a passivation device, wherein the spray type passivation device comprises a shot blasting cleaning chamber, a passivation tank, a cleaning tank and a drying chamber and is used for passivating the semi-finished product subjected to zinc impregnation;
the sealing device comprises a spraying device and a drying device, wherein the spraying device is used for spraying weather-resistant paint sealing liquid on the passivated semi-finished product; and the drying device is used for drying the sprayed semi-finished product to obtain a finished steel beam product.
The laser cutting device is a numerical control laser cutting machine with the model WALC 1550F. The bending device is a hydraulic plate bending machine, and the model is WC 67Y-125/1600.
The welding robot workstation is model ZK 1006A-144-B. The welding device further comprises a welding positioning turnover device, and the welding robot workstation is matched with the welding positioning turnover device to continuously weld the two sides of the steel beam and the steel plate.
Welding position turning device, as shown in fig. 3 and 4, includes the upset rack 21, the upset rack 21 is the square frame structure, and one side mesa is through two fly leaf 22 clamping location support built-in boards or the built-in board of preventing falling roof beam, and two fly leaves 22 are arranged and are set up on one side mesa of upset rack 21, connect through fixed plate 222, arrange on the fly leaf 22 and set up a plurality of locating hole 221, locating hole 221 runs through fly leaf 22, set up a plurality of stopper 23 on the fly leaf 22, preferably be provided with round hole and bar hole simultaneously on the stopper 23, stopper 23 with fly leaf 22 passes through connecting piece 26 and can dismantle the connection.
During the use, set up the support built-in panel or prevent falling roof beam built-in panel on the fly leaf 22, one side is laminated with the fixed plate 222 that is used for connecting two fly leaves 22, the both sides laminating that is located on fly leaf 22 sets up stopper 23, pass through connecting piece 26 with stopper 23 and the locating hole 221 on the corresponding position and be connected, realize the tight location of clamp to support built-in panel or prevent falling roof beam built-in panel, because stopper 23 can carry out the position adjustment of adaptability according to the overall dimension of support built-in panel or prevent falling roof beam built-in panel, make the welding positioning turning device of this embodiment can adapt to the clamping location of full-size support built-in panel and prevent falling roof beam built-in panel, accomplish the welding of telescopic on it, accommodation is wider.
Another side mesa, as shown in fig. 4, through limiting plate and fly leaf 22 cooperation clamping location steel beam, the steel beam includes roof 13, bottom plate 12 and is located backup pad 12 between roof 13 and the bottom plate 11, wherein bottom plate 11 is the heterotypic board, the limiting plate includes end panel 24 and side board 25, end panel 24 is two, two end panel 24 sets up relatively, and all sets up two draw-in grooves 241 on every end panel 24, and one is used for the card to hold roof 13, and one is used for the card to hold bottom plate 11, side board 25 sets up between both ends panel 24, have with the spacing limit 251 of bottom plate 11 adaptation, end panel 24 and side board 25 all pass through bolted connection on upset rack 21, and with fly leaf 22 is parallel arrangement relatively, make the recess that forms and be used for bearing the bearing steel beam.
During the use, the bottom plate 11 and the roof 13 that will constitute the steel crossbeam are held spacingly through draw-in groove 241 card, set up backup pad 12 both ends on end panel 24, bottom plate 11 and roof 13 base with fly leaf 22 laminating makes the constitution the three steel sheet part of steel crossbeam is fixed a position by the clamping, can carry out the single face welding, when needing the upset to carry out double-sided welding, through set up clamp plate anchor clamps 29 on the end panel 24, compresses tightly backup pad 12 on end panel 24, realizes the position stability of the steel crossbeam after 180 upsets of upset rack.
The welding device further comprises a welding tool, and the welding tool is used for positioning the welding positions of the round column head welding nails and the angle steel. As shown in fig. 5, the welding fixture includes four positioning grooves 31, 32, 33, 34, which correspond to four stud welding nails respectively; and a positioning square groove 35 corresponding to the angle iron.
The zinc impregnation device is an electric heating tetragonal zinc impregnation furnace with the model of KA-SXD 3-280. And an electric heating tetragonal zincizing furnace, with the model of KA-SXD 3-520. Two zinc impregnation furnaces with different specifications are flexibly adjusted according to production requirements.
When the steel beams are arranged in the zinc impregnation device, the zinc impregnation device comprises a plurality of arrangement units which are arranged in sequence, and each arrangement unit comprises a first steel beam A and a second steel beam B; the first steel beam A is arranged upright, the second steel beam B is arranged upside down, and the narrow end of the first steel beam A extends into the wide end of the second steel beam B; the narrow end of the second steel beam B extends into the wide end of the first steel beam A.
As shown in fig. 6, the steel cross member has a front view in which the upper end is a narrow end and the lower end is a wide end. The lower end is defined as the upright position when the lower end is a wide end; the lower end being a narrow end is defined as inverted. As shown in fig. 7, in each arrangement unit, when the first steel beam a and the second steel beam B are combined, the first steel beam a is upright and the second steel beam B is inverted. As shown in the plan view of fig. 8, the bottom plate of the wide end of the second steel beam B is in close contact with the top plate of the narrow end of the first steel beam a. So that the occupied area of the whole arrangement unit is reduced. The space between the bottom plate and the top plate is fully utilized through the matching mode of righting and inverting the two steel cross beams in each arrangement unit. In fig. 8, the second steel beam B is filled with shading to distinguish the first steel beam a from the second steel beam B.
When arranging a plurality of units of arranging, as shown in fig. 9, between the adjacent unit of arranging, the length of angle steel is greater than the length of cylinder head welding nail, and the angle steel all is located the narrow end of steel crossbeam for the angle steel of adjacent two units of arranging can crisscross, space between the angle steel of two steel crossbeams of make full use of.
By adopting the arrangement mode, more steel beams can be arranged in unit volume, and due to dense arrangement, a plurality of steel beams are combined into a whole in the 360-degree overturning process of the zinc impregnation device, and a single steel beam is not easy to shake. The combination mode of each steel beam and other steel beams around is basically consistent, and the zinc impregnation technological parameters are easier to adjust during zinc impregnation, so that the product quality of each steel beam is ensured to be consistent.
And a separating dust remover, with the model number of KA-FLQ3-1035, is arranged above the zinc impregnation device. The separation dust remover comprises a separation cover which can be covered on the zinc impregnation device.
Still include the dust collection processing apparatus, the air inlet of dust collection processing apparatus with throw ball rust cleaning device, laser cutting device with welding device's discharge port intercommunication.
The passivation device and the sealing device are connected into a passivation-sealing suspension chain production line through a suspension chain production line, as shown in figure 2, and continuous production is facilitated.
Example 2
A method for producing a steel cross beam of a railway sidewalk is shown in a process flow chart of figure 10, and preferably adopts the production line in the embodiment 1 for production, and comprises the following steps,
s1, cutting holes on the steel plate, and cutting and forming the raw material steel plate according to preset parameters by using a laser cutting machine to obtain a bottom plate, a supporting plate and a top plate; bending and molding the bottom plate to obtain a bent bottom plate;
the steel plate cutting and hole opening process is carried out by using a numerical control laser cutting machine, technicians firstly draw CAD drawings of three steel plates of a steel beam, guide the CAD drawings into a special program of the numerical control laser cutting machine to form a cutting program in a programming mode, and guide the cutting program into the numerical control cutting machine to cut the steel plates. The cutting speed and the hole opening precision of the steel plate are ensured. The cutting speed is about 6-8 times of that of thermal cutting by adopting laser cutting.
S2, assembling and welding, namely welding the bent bottom plate, the bent support plate and the bent top plate; then, welding a cylindrical head welding nail and a steel cross beam to the top plate; obtaining a welded steel beam; and positioning the bottom plate, the supporting plate and the top plate by adopting a welding positioning turnover device. And (5) positioning the cylindrical head welding nail and positioning the angle steel by adopting a welding tool.
The assembly welding between the steel plates is realized by welding through a welding robot workstation and matching with a welding positioning device, so that the two sides of the steel beam and the steel plate are welded. According to the positions of the cylindrical head welding nails and the angle steel, a welding tool is designed, and the welding tool is provided with clamping grooves corresponding to the angle steel and the cylindrical head welding nails, as shown in fig. 5, wherein four grooves (31, 32, 33 and 34 respectively correspond to four cylindrical head welding nails) and a square groove 35 corresponds to the position of the angle steel, so that the welding speed and the accuracy of the welding position can be greatly improved, the simultaneous positioning welding of the cylindrical head welding nails and the angle steel is realized, and the welding efficiency is improved by about 8-10 times compared with that of the common manual welding.
S3, performing shot blasting rust removal, namely performing rust removal on the welded steel beam, wherein the rust removal grade is more than grade Sa 3;
the steel beams after being welded qualified need to be subjected to decontamination and rust removal treatment one by one, and oil stains and iron on the surfaces of the steel plates are mainly removedAnd (5) rusting. The steel beam is shot-blasted and derusted by a through shot-blasting cleaning machine, the steel beam is placed on a roller way of the shot-blasting machine, the running speed of the shot-blasting machine and the using amount of steel shots are adjusted to control the shot-blasting quality of the steel beam, and the derusting grade is not lower than the Sa3 grade specified in GB/T8923.1-2008. I.e. very thorough spray cleaning, the surface should be free of visible oils, greases and dirt, and free of scale, rust, coatings and foreign matter. Any remaining traces of contaminants should appear as only a slight spot or streak. After the shot blasting treatment is finished, performing multi-element alloy co-infiltration treatment within 1 hour to prevent the steel beam from being polluted again, checking the rust removal grade of the steel beam after more than 1 hour, and performing zinc infiltration after the steel beam does not reach Sa3 grade and is shot blasted again. The passing shot blast machine adopts the granularity of
Alloy steel shot of (2) and
cutting steel wires into shots, and cleaning attachments such as oxide skin, rust, oil stains and the like on the surface of the steel beam through strong intensive striking friction, so that the quality standard of shot blasting cleaning is met. When the through type shot blasting machine is used for the first time, the granularity is
The alloy steel shot is added with 800kg and has the granularity of
200kg of steel wire cutting pellets are added.
S4, zinc impregnation separation, namely performing multi-element alloy co-impregnation by using a tetragonal zinc impregnation furnace, and after the co-impregnation is finished, replacing a separation cover and separating by using a separation dust remover;
when the steel beams are arranged in the zinc impregnation device, the zinc impregnation device comprises a plurality of arrangement units which are arranged in sequence, and each arrangement unit comprises a first steel beam and a second steel beam; the first steel cross beam is arranged rightly, the second steel cross beam is arranged inversely, and the narrow end of the first steel cross beam extends into the wide end of the second steel cross beam; the narrow end of the second steel beam extends into the wide end of the first steel beam.
The steel beam is subjected to multi-element alloy co-infiltration within 1 hour of shot blasting and rust removal, and an electric heating square zincizing furnace is used for multi-element alloy co-infiltration treatment. The furnace body can be divided into a 3.5m zinc impregnation furnace and a 6.5m zinc impregnation furnace according to the size of the furnace body, each furnace can be provided with 35/69 steel beams, and different amounts of impregnation agent base materials and supplement materials of each furnace are respectively added. The specific proportions of the penetrants are shown in the following table:
TABLE 1 proportioning table of penetrants
Setting the heat preservation temperature to 450 ℃, heating the heating body to the constant temperature of 450 ℃ after 1h and 10min, starting heat preservation when the furnace pipe reaches the heat preservation temperature of 405 ℃ after 7h, finishing heat preservation after 1.5h, starting cooling, and discharging. The furnace cover is changed into a special furnace cover for separating and dedusting, and the separation and dedusting treatment is carried out in a separation deduster by utilizing the hole on the furnace cover to rotate and separate for half an hour.
S5, passivating, namely, sequentially carrying out ash removal and dust removal, passivating, washing, drying and cooling on the galvanized steel beam;
and S6, sealing, namely spraying the passivated steel beam with water-based weather-resistant paint sealing liquid, and drying to obtain a steel beam finished product.
And step S5, passivating and step S6 closing, wherein the steel beam to be processed is hung on a suspension chain production line for processing.
The passivation and sealing treatment is simultaneously carried out on a production line of a passivation-sealing suspension chain, and the process is carried out by shot blasting dust removal → water washing → drying → passivation → drying → sealing → drying.
Most of multi-element alloy co-infiltration agent dust is removed from the steel beam after separation and dust removal, and the infiltration agent dust tightly attached to the surface of the steel beam is removed through shot blasting on a suspension chain by slight shot blasting.
The water washing and passivation process adopts an internal circulation spray device (an internal circulation spray passivation system of a zincification product, application number 2020230068790), the passivation solution uses a chromium-free environment-friendly passivation solution, the one-time investment of the passivation solution can be reduced, the environmental pollution problem is reduced, and the cost of the passivation solution and the labor cost are reduced. The water washing and drying of the steel beam mainly wash off the residual penetrating agent powder on the surface, keep the surface of the steel beam clean and dry and create conditions for passivation effect.
The steel beam passes through a passivation-closed suspension chain production line and sequentially passes through a rinsing bath, a drying chamber, a passivation tank and the drying chamber to complete the steps of rinsing and passivation. And (4) after the passivation treatment of the steel beam is finished, drying the steel beam in a drying chamber at a high temperature of 100 ℃ to solidify the passivation solution. Sealing treatment: the steel beam sealing treatment is carried out on a suspension chain production line, sealing treatment is carried out on the steel beam by spraying sealing liquid through a small-sized spray can, and then sealing is finished through high-temperature drying at 140 ℃ in a drying chamber.
The steel beam is shot to blast and is used rust dust collection processing system, and the rust dust that the shot-blast produced of recycle avoids causing the pollution because of direct discharge air. The passivation process adopts the chromium-free environment-friendly passivation solution, does not use the traditional hexavalent chromium passivation solution, and uses an internal circulation spraying passivation system to passivate the steel beam, thereby greatly reducing the one-time input of the passivation solution and simultaneously avoiding the problems of waste and environmental pollution caused by difficult storage due to high molecular activity of the chromium-free environment-friendly passivation solution.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A railway sidewalk steel beam production line is characterized by comprising a laser cutting device, a bending device, a welding device, a shot blasting and rust removing device, a zinc impregnation device, a passivation device and a sealing device;
the laser cutting device is used for cutting the outline and the open pore of the raw material steel plate according to preset parameters to obtain a bottom plate (11), a supporting plate (12) and a top plate (13);
the bending device comprises a bending die, and the bottom plate (11) is formed in the bending die in a punching mode;
the welding device comprises a welding robot workstation, a stud welding machine and a secondary welding device; the welding robot workstation is used for welding the bent bottom plate (11), the support plate (12) and the top plate (13); the stud welding machine is used for welding the cylindrical head welding nail (14) with the top plate (13); the two weld protectors are used for welding angle steel (15) and the top plate (13);
the shot blasting rust removal device comprises a through type shot blasting machine and is used for carrying out rust removal treatment on the welded semi-finished product;
the zincizing device comprises a tetragonal zincizing furnace and is used for carrying out zincizing treatment on the derusted semi-finished product;
the passivation device comprises a spray type passivation device, a spray type passivation device and a passivation device, wherein the spray type passivation device comprises a shot blasting cleaning chamber, a passivation tank, a cleaning tank and a drying chamber and is used for passivating the semi-finished product subjected to zinc impregnation;
the sealing device comprises a spraying device and a drying device, wherein the spraying device is used for spraying weather-resistant paint sealing liquid on the passivated semi-finished product; and the drying device is used for drying the sprayed semi-finished product to obtain a finished steel beam product.
2. The railway sidewalk steel beam production line according to claim 1, wherein the laser cutting device is a numerical control laser cutting machine; the bending device is a hydraulic plate bending machine.
3. The production line of the steel cross beam of the railway sidewalk as claimed in claim 1, wherein the welding device further comprises a welding positioning turnover device, and the welding robot workstation and the welding positioning turnover device are matched to continuously perform double-side welding on the steel cross beam and the steel plate.
4. The production line of the steel cross beams of the railway sidewalk is characterized in that the welding device further comprises a welding tool, and the welding tool is used for positioning the welding positions of the cylindrical head welding nails (14) and the angle steel (15).
5. The steel beam production line of the railway sidewalk according to the claim 1, wherein the steel beam comprises a plurality of arrangement units arranged in sequence when arranged in the zincizing device, and each arrangement unit comprises a first steel beam (A) and a second steel beam (B); the first steel cross beam (A) is arranged upright, the second steel cross beam (B) is arranged upside down, and the narrow end of the first steel cross beam (A) extends into the wide end of the second steel cross beam (B); the narrow end of the second steel beam (B) extends into the wide end of the first steel beam (A).
6. The railway sidewalk steel beam production line according to claim 1, wherein the passivating device and the closing device are connected into a passivating-closing suspension chain production line through a suspension chain production line; the passivation-closed suspension chain production line comprises a feeding area, an automatic shot blasting cleaning chamber, a rinsing tank, a passivation drying chamber, a passivation tank, a passivation drying chamber, a closed spraying station, a closed drying chamber and a discharging area, wherein the feeding area, the automatic shot blasting cleaning chamber, the rinsing tank, the passivation drying chamber, the closed spraying station, the closed drying chamber and the discharging area run along the suspension chain production line.
7. A method for producing a steel cross beam of a railway sidewalk is characterized by comprising the following steps,
s1, cutting holes on the steel plate, and cutting and forming the raw steel plate according to preset parameters by using a laser cutting machine to obtain a bottom plate (11), a supporting plate (12) and a top plate (13); bending and molding the bottom plate (11) to obtain the bent bottom plate (11);
s2, assembling and welding, namely welding the bent bottom plate (11), the support plate (12) and the top plate (13); then, welding a cylindrical head welding nail (14) and a steel cross beam to the top plate (13); obtaining a welded steel beam;
s3, performing shot blasting rust removal, namely performing rust removal on the welded steel beam, wherein the rust removal grade is more than grade Sa 3;
s4, zinc impregnation separation, namely performing multi-element alloy co-impregnation by using a tetragonal zinc impregnation furnace, and after the co-impregnation is finished, replacing a separation cover and separating by using a separation dust remover;
s5, passivating, namely, sequentially carrying out ash removal and dust removal, passivating, washing, drying and cooling on the galvanized steel beam;
and S6, sealing, namely spraying the passivated steel beam with water-based weather-resistant paint sealing liquid, and drying to obtain a steel beam finished product.
8. The method for producing the steel cross beam of the railway sidewalk according to the claim 7, wherein in the step S2, a welding positioning and overturning device is used for positioning the bottom plate (11), the support plate (12) and the top plate (13).
9. The method for producing the steel cross beam of the railway sidewalk according to the claim 7, wherein in the step S2, a welding tool is adopted to position the cylindrical head welding nails (14) and the angle steel (15) in the assembly welding.
10. The method for producing a steel beam for a railway sidewalk according to claim 7, wherein the steps of S5 passivation and S6 sealing are performed by hanging the steel beam to be processed on a suspension chain production line.
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