CN111558900B - Shot blasting method for removing stress of steel structure workpiece - Google Patents
Shot blasting method for removing stress of steel structure workpiece Download PDFInfo
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- CN111558900B CN111558900B CN202010365620.0A CN202010365620A CN111558900B CN 111558900 B CN111558900 B CN 111558900B CN 202010365620 A CN202010365620 A CN 202010365620A CN 111558900 B CN111558900 B CN 111558900B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/10—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for compacting surfaces, e.g. shot-peening
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C3/00—Abrasive blasting machines or devices; Plants
- B24C3/02—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other
- B24C3/04—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other stationary
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C5/00—Devices or accessories for generating abrasive blasts
- B24C5/06—Impeller wheels; Rotor blades therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
- B24C7/0092—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed by mechanical means, e.g. by screw conveyors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
- C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
- C21D7/06—Modifying the physical properties of iron or steel by deformation by cold working of the surface by shot-peening or the like
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- 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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G3/00—Apparatus for cleaning or pickling metallic material
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- Chemical & Material Sciences (AREA)
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- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention belongs to the technical field of shot blasting, and particularly relates to a shot blasting method for removing stress of a steel structure workpiece, which comprises a shell, a motor and a feeding pipe, wherein the shell is provided with a plurality of cavities; a rotary disc is rotatably connected inside the shell; a motor is arranged above the shell, and an output shaft of the motor penetrates through the shell and is fixedly connected with the upper surface of the rotary table; a feeding pipe is arranged below the shell; the outer arc surface of the shell is fixedly connected with a discharge pipe; the centrifugal acceleration of the shot blasting machine is effectively realized, the shot blasting abrasive is subjected to progressive centrifugal acceleration through the plane spiral structure, the direct impact problem of the shot blasting abrasive is effectively avoided, the long-time sustainable working capacity of the shot blasting machine is greatly improved, the impact phenomenon of the shot blasting abrasive is reduced, and the service life of equipment is greatly prolonged.
Description
Technical Field
The invention belongs to the technical field of shot blasting, and particularly relates to a shot blasting method for removing stress of a steel structure workpiece.
Background
The shot blasting is the name of a surface treatment process in the mechanical aspect, the similar process comprises sand blasting and shot blasting, the shot is a cold treatment process and is divided into shot blasting cleaning and shot blasting strengthening, the shot blasting cleaning is as the name suggests to remove impurities such as surface oxide skin and the like and improve the appearance quality, and the shot blasting strengthening is to continuously impact the surface of a strengthened workpiece by using a shot (60-110m/s) flow moving at high speed so as to force the surface of a target material and a surface layer (0.10-0.85mm) to change in a cyclic deformation process: 1. the microstructure is modified; 2. residual compressive stress is introduced into the non-uniform plastic deformation outer surface layer, and residual tensile stress is produced on the inner surface layer; 3. the change in the roughness of the outer surface (RaRz), affects: can improve the fatigue fracture resistance of materials/parts, prevent fatigue failure, plastic deformation and brittle fracture and prolong the fatigue life.
CN107891374A a shot blasting processing technology, in the prior art, a commonly used method for removing stress of a steel structure workpiece is to use a shot blasting machine to control the spraying speed of shot blasting abrasives through the shot blasting machine in the shot blasting machine, the existing shot blasting machine on the market basically adopts a vane type, the shot blasting abrasives are accelerated rapidly through the rotation of the vane, and the spraying speed of the shot blasting abrasives can be controlled by controlling the rotation speed of the vane, but when the vane type shot blasting machine centrifugally accelerates the shot blasting abrasives, a large amount of shot blasting abrasives directly impact the vane, so that serious damage to the vane can be caused after long-term use.
In view of this, in order to overcome the above technical problems, the present company has designed and developed a geothermal well drilling construction process, which uses a special impeller head to solve the above technical problems.
Disclosure of Invention
In order to make up for the defects of the prior art and solve the problems that in the prior art, the conventional method for removing the stress of a steel-structure workpiece is to control the spraying speed of shot blasting abrasive materials through a shot blasting machine and a shot blasting machine in the shot blasting machine, the conventional shot blasting machine on the market basically adopts a blade type, shot blasting abrasive materials are rapidly accelerated through the rotation of the blade, and the spraying speed of the shot blasting abrasive materials can be controlled by controlling the rotating speed of the blade, but when the blade type shot blasting machine centrifugally accelerates the shot blasting abrasive materials, a large amount of shot blasting abrasive materials directly impact the blade, so that the blade is seriously damaged after long-term use, and the like.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a shot blasting method for removing stress of a steel structure workpiece, which comprises the following steps:
s1: putting a workpiece into a degreasing agent solution for degreasing treatment, then putting the workpiece into clear water for washing, taking out the workpiece, blowing off water on the surface of the workpiece by using compressed air, and then putting the workpiece into a drying chamber for drying until the water content of the workpiece is less than 0.3 wt%; before carrying out the shot-blasting, at first carry out the degrease processing to workpiece surface to wash, the effectual grease material that gets rid of workpiece surface reduces workpiece surface grease thing to the influence of the effective processing of work piece stress, and workpiece surface is clean simultaneously, also is favorable to the quick clearance in later stage, avoids the granule that drops on the surface of steel to have grease to glue the problem.
S2: selecting a mixed abrasive consisting of steel grit and steel shots as a shot blasting abrasive, screening the mixed abrasive into uniform granularity by using a screen, cleaning, drying and then putting into a shot blasting device; the mixed shot blasting abrasive material formed by the steel grit and the steel shot has better effect when the surface of the workpiece is subjected to shot blasting treatment.
S3: after the shot blasting machine is debugged, placing the dried workpiece in a shot blasting chamber, adjusting the rotating speed of the shot blasting machine according to the thickness of the part of the workpiece facing the shot blasting machine, performing shot blasting treatment, turning over the workpiece after the shot blasting of the part is finished, facing the other part of the workpiece to a nozzle of the shot blasting machine, adjusting the rotating speed of the shot blasting machine according to the thickness of the part of the workpiece, performing shot blasting treatment, and turning over the workpiece until all parts of the workpiece are subjected to shot blasting treatment; through the rotational speed of adjusting the impeller head, can the spun speed of the mixed abrasive of effectual control, and then realize the adjustment to mixed abrasive and work piece surface impact dynamics, consequently to thinner work piece or the thinner position in work piece position, can reduce the impact through the rotational speed that reduces the impeller head, avoid the damage problem of great impact dynamics to the work piece.
S4: after the shot blasting is finished, cleaning pills on the surface of the workpiece by using a rolling brush, blowing off attachments on the surface of a steel plate by using a blowing device, inspecting the workpiece, checking whether the surface of the workpiece has no oil, rust or oxide skin, and checking whether the surface roughness of the workpiece meets the requirement; can carry out basic clearance to the pill on workpiece surface through the round brush, avoid some pills to glue at workpiece surface, then thoroughly blow away the attachment on steel sheet surface through blast apparatus, realize the thorough cleanness to steel sheet surface.
The impeller head used in the S3 comprises a shell, a motor and a feeding pipe; the shell is designed into a cylindrical structure; the lower surface of the shell is fixedly connected with supporting legs which are uniformly arranged at the position close to the outer cambered surface of the shell; the upper surface of the shell is fixedly connected with an installation cover; the mounting cover is internally and horizontally and fixedly connected with a mounting plate; the upper surface of the mounting plate is fixedly connected with a motor; an output shaft of the motor penetrates through the mounting plate and extends to the position below the mounting plate; the output shaft of the motor is fixedly connected with a rotating column; a rotating cavity is formed in the shell; the inner part of the rotating cavity is rotatably connected with a rotating disc, and the lower surface of the rotating column penetrates through the shell and is fixedly connected with the upper surface of the rotating disc; a rotating groove is formed in the lower surface of the rotating disc at the axis position of the rotating disc; the feeding pipe penetrates through the shell downwards and extends to the lower position of the shell, and the feeding pipe is fixedly connected with the shell; the axial line of the feeding pipe is designed into an L-shaped structure; the right end face of the feeding pipe is fixedly connected with an air pipe; the interior of the air pipe is rotatably connected with an air shaft; the surface of the wind shaft is fixedly connected with uniformly arranged fan blades; a spiral accelerating channel is formed in the turntable and is on the same horizontal plane; a circle of uniformly arranged feeding holes are formed in the inlet of the feeding pipe at the accelerating channel; the outer arc surface of the shell is provided with a discharge hole at the position of the turntable; the outer arc surface of the shell is fixedly connected with a discharge pipe at a discharge hole; when the impeller head works, after the steel structure workpiece is machined, the problem of residual stress or stress concentration occurs on the surface of steel, so that the stress can be slowly released in the long-term use process, and further the steel structure is damaged, and the problem of steel plate fracture is caused, in the prior art, the current common mode for removing the stress of the steel structure workpiece is to control the spraying speed of shot blasting abrasive materials through an impeller head and an impeller head in the impeller head, the existing impeller head on the market basically adopts a vane type, the shot blasting abrasive materials are rapidly accelerated through the rotation of the vane, and meanwhile, the spraying speed of the shot blasting abrasive materials can be controlled through controlling the rotating speed of the vane, but when the vane type impeller head centrifugally accelerates the shot blasting abrasive materials, a large amount of shot blasting abrasive materials directly impact the vane, so that the problems of serious damage to the vane and the like can occur after long-term use, therefore, according to the shot blasting method for removing the stress of the steel structure workpiece, when the shot blasting device is needed, the power supply is started firstly through the shot blasting device used in the method, so that the air shaft rotates, the air shaft and the fan blade rotate, the generated pressure difference can drive shot blasting abrasive to enter the feeding pipe, meanwhile, the motor rotates, the output shaft of the motor drives the rotary table in the shell to rotate, therefore, due to the pressure difference, the air flow can drive the shot blasting abrasive to enter the accelerating channel through the feeding hole, due to the rapid rotation of the rotary table, the spiral accelerating channel can lead the shot blasting abrasive to be rapidly and centrifugally accelerated, finally, the high-speed shot blasting abrasive can enter the discharging pipe through the discharging hole, the high-speed shot blasting abrasive is led out through the discharging pipe, the leading-out speed of the shot blasting abrasive can be effectively controlled by controlling the rotation of the rotary table, and the direct impact between the shot blasting abrasive and the power accelerating movement mechanism is avoided through the centrifugal accelerating mode, the impact of high-speed impact on moving parts is avoided, centrifugal acceleration of the shot blasting machine is effectively realized, the shot blasting abrasive is subjected to progressive centrifugal acceleration through the plane spiral structure, the direct impact problem of the shot blasting abrasive is effectively avoided, the long-time sustainable working capacity of the shot blasting machine is greatly improved, the impact phenomenon of the shot blasting abrasive is reduced, and the service life of the shot blasting machine is greatly prolonged.
Preferably, a plurality of acceleration channels are formed in the turntable, and the acceleration channels are respectively located at different horizontal height positions; the inlet positions of the feed pipes in the acceleration channels are provided with a plurality of circles of uniformly arranged feed inlets; the outlets of all the accelerating channels can discharge steel grit through the same discharge pipe; during operation, because the carousel is inside only to be single with higher speed the passageway, consequently the discharge gate of passageway with higher speed can only be the discontinuous derivation shot-blasting abrasive material, consequently when throwing the ball processing to the surface of work piece, it is relatively poor to throw ball abrasive material blowout continuity, consequently, the sustainable shot-blasting processing ability to the work piece is not enough, especially can appear throwing the change problem that appears rocking and distance between the ball twice, consequently can appear the work piece surface treatment incoherence problem easily, consequently through setting up a plurality of passageways with higher speed, the entry through a plurality of passageways with higher speed is located different positions, consequently, realize a plurality of passageways with higher speed and to throwing the alternate acceleration of ball abrasive material, realize throwing the sustainable ejection capacity with higher speed of ball abrasive material.
Preferably, the outlet positions of the accelerating passages are provided with sealing baffles; the sealing baffle and the rotary table are connected in a sliding manner, and a spring is fixedly connected at the connection position; a convex ball is arranged on the side surface of the sealing baffle plate, which is opposite to one side of the inner cambered surface of the shell; when the acceleration channel finishes acceleration work once, the outlet of the acceleration channel is in contact seal with the inside of the shell and rotates relatively, however, when the shot blasting abrasive is positioned between the shell and the rotary table, the problem of serious abrasion between two contact surfaces is easily caused, and the sealing performance is poor, so by arranging the sealing baffle, when the single acceleration work is finished, the convex ball of the surface of the sealing baffle plate can be contacted with the inner surface of the shell, thereby automatically driving the sealing baffle to slide, realizing the quick and effective sealing of the outlet position of the acceleration channel, when the outlet of the accelerating channel rotates to the position of the discharge pipe again, the lug can be separated from the inner surface of the shell, therefore, under the action of the elastic force of the spring, the sealing baffle slides again, the outlet of the acceleration channel is opened again, and the acceleration channel is sequentially circulated to realize the automatic opening and closing of the acceleration channel.
Preferably, the outer arc surface of the sealing baffle is provided with a ball groove at the position of the convex ball; the convex balls are in rolling connection with the inner parts of the corresponding ball grooves; during operation, because be sliding friction between the internal surface of convex ball and casing, consequently last the use back, can make the internal surface of convex ball or casing produce serious wearing and tearing problem, consequently set up the ball groove on sealing baffle's surface, through the inside roll connection of convex ball at the ball groove, consequently can realize roll connection between the internal surface of convex ball and casing, reduce the wearing and tearing problem by a wide margin, improve the life of impeller head.
Preferably, the sealing positions of the corresponding sealing baffles of the rotary table are provided with sealing grooves; sealing gaskets are arranged inside the sealing grooves; the sealing gasket is made of soft rubber materials; the during operation, because throw the high-speed injection needs of ball abrasive material, consequently, need the carousel to carry out high-speed rotation, realize the high-speed acceleration to the peening, but the carousel high-speed motion, can make the protruding ball drive sealing baffle fast and slide, consequently, when can making sealing baffle close, produce great impact between sealed archives and the carousel, consequently, through seting up the seal groove, through linking firmly sealed the pad in the inside of seal groove, sealed pad can effectually play the cushioning effect, reduce sealing baffle's impact force, also can promote sealing baffle's sealed effect simultaneously.
Preferably, the sealing gaskets are in sliding connection with the corresponding sealing grooves; a first telescopic rod is fixedly connected between each sealing gasket and the corresponding groove bottom of each sealing groove, and a piston rod of each first telescopic rod is fixedly connected with the corresponding sealing gasket; second telescopic rods are arranged above the feed inlets; the piston rods of the second telescopic rods are fixedly connected with baffle plates; during operation, after the export of passageway with higher speed is closed to seal baffle, the entry of passageway with higher speed still is the open mode, consequently still have the inside that a large amount of shot-blasting abrasive materials lasted and enter into this passageway with higher speed, and through the acceleration of passageway with higher speed, pile up in the export problem of passageway with higher speed, in the twinkling of an eye after seal baffle opens once more there is a large amount of shot-blasting abrasive materials blowout, be unfavorable for throwing shot-blasting abrasive materials spun homogeneity, consequently, through setting up first telescopic link, second telescopic link and baffle, can make first telescopic link produce the compression through seal baffle, and then the inside of second telescopic link can be entered into to the inside of first telescopic link, the second telescopic link can drive the baffle ejecting, the realization is to the self-closing of passageway entry with higher speed, consequently, passageway entry and the synchronism of export state of opening and shutting with higher speed have been realized.
The invention has the following beneficial effects:
1. according to the shot blasting method for removing the stress of the steel structure workpiece, the shot blasting device is used, the shell, the motor and the feeding pipe are arranged, the shell is internally and rotatably connected with the rotary table, the motor is arranged above the shell and drives the rotary table to rotate, and the feeding pipe is arranged below the shell; the centrifugal acceleration of the shot blasting machine is effectively realized, the shot blasting abrasive is subjected to progressive centrifugal acceleration through the plane spiral structure, the direct impact problem of the shot blasting abrasive is effectively avoided, the long-time sustainable working capacity of the shot blasting machine is greatly improved, the impact phenomenon of the shot blasting abrasive is reduced, and the service life of equipment is greatly prolonged.
2. According to the shot blasting method for removing the stress of the steel structure workpiece, the shot blasting device is provided with the sealing baffle, the spring and the convex balls, and the convex balls on the surface of the sealing baffle can be in contact with the inner surface of the shell through the sealing baffle after single acceleration work is finished, so that the sealing baffle can be automatically driven to slide, the outlet position of the acceleration channel can be quickly and effectively sealed, when the outlet of the acceleration channel rotates to the position of the discharge pipe again, the convex blocks can be separated from the inner surface of the shell, so that the sealing baffle slides again under the action of the elastic force of the spring, the outlet of the acceleration channel is opened again, the circulation is performed in sequence, and the automatic opening and closing of the acceleration channel are realized.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a flow chart of a method of the present invention;
fig. 2 is an external view of a blast head used in the present invention;
FIG. 3 is a perspective view of a shot blast apparatus used in the present invention;
FIG. 4 is a top view of a shot blast apparatus used in the present invention;
FIG. 5 is a front view of a shot blast apparatus used in the present invention;
FIG. 6 is a cross-sectional view taken at A-A of FIG. 4;
FIG. 7 is a cross-sectional view taken at B-B of FIG. 5;
FIG. 8 is an enlarged partial view at C of FIG. 6;
FIG. 9 is an enlarged partial view at D of FIG. 7;
in the figure: the device comprises a shell 1, supporting legs 11, an installation cover 12, a discharge pipe 13, a motor 2, an installation plate 21, a rotating column 22, a rotating disc 23, an acceleration channel 24, a sealing baffle plate 25, a spring 26, a convex ball 27, a sealing gasket 28, a first telescopic rod 29, a second telescopic rod 210, a baffle plate 211, a feed pipe 3, an air pipe 31, an air shaft 32 and fan blades 33.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 9, the shot blasting method for removing stress of a steel structure workpiece, provided by the invention, comprises the following steps:
s1: putting a workpiece into a degreasing agent solution for degreasing treatment, then putting the workpiece into clear water for washing, taking out the workpiece, blowing off water on the surface of the workpiece by using compressed air, and then putting the workpiece into a drying chamber for drying until the water content of the workpiece is less than 0.3 wt%; before carrying out the shot-blasting, at first carry out the degrease processing to workpiece surface to wash, the effectual grease material that gets rid of workpiece surface reduces workpiece surface grease thing to the influence of the effective processing of work piece stress, and workpiece surface is clean simultaneously, also is favorable to the quick clearance in later stage, avoids the granule that drops on the surface of steel to have grease to glue the problem.
S2: selecting a mixed abrasive consisting of steel grit and steel shots as a shot blasting abrasive, screening the mixed abrasive into uniform granularity by using a screen, cleaning, drying and then putting into a shot blasting device; the mixed shot blasting abrasive material formed by the steel grit and the steel shot has better effect when the surface of the workpiece is subjected to shot blasting treatment.
S3: after the shot blasting machine is debugged, placing the dried workpiece in a shot blasting chamber, adjusting the rotating speed of the shot blasting machine according to the thickness of the part of the workpiece facing the shot blasting machine, performing shot blasting treatment, turning over the workpiece after the shot blasting of the part is finished, facing the other part of the workpiece to a nozzle of the shot blasting machine, adjusting the rotating speed of the shot blasting machine according to the thickness of the part of the workpiece, performing shot blasting treatment, and turning over the workpiece until all parts of the workpiece are subjected to shot blasting treatment; through the rotational speed of adjusting the impeller head, can the spun speed of the mixed abrasive of effectual control, and then realize the adjustment to mixed abrasive and work piece surface impact dynamics, consequently to thinner work piece or the thinner position in work piece position, can reduce the impact through the rotational speed that reduces the impeller head, avoid the damage problem of great impact dynamics to the work piece.
S4: after the shot blasting is finished, cleaning pills on the surface of the workpiece by using a rolling brush, blowing off attachments on the surface of a steel plate by using a blowing device, inspecting the workpiece, checking whether the surface of the workpiece has no oil, rust or oxide skin, and checking whether the surface roughness of the workpiece meets the requirement; can carry out basic clearance to the pill on workpiece surface through the round brush, avoid some pills to glue at workpiece surface, then thoroughly blow away the attachment on steel sheet surface through blast apparatus, realize the thorough cleanness to steel sheet surface.
The shot blasting device used in the S3 comprises a shell 1, a motor 2 and a feeding pipe 3; the shell 1 is designed into a cylindrical structure; the lower surface of the shell 1 is fixedly connected with supporting legs 11 which are uniformly arranged at the position close to the outer cambered surface of the shell 1; the upper surface of the shell 1 is fixedly connected with a mounting cover 12; the mounting cover 12 is horizontally and fixedly connected with a mounting plate 21 inside; the upper surface of the mounting plate 21 is fixedly connected with a motor 2; the output shaft of the motor 2 penetrates through the mounting plate 21 and extends to the position below the mounting plate 21; the output shaft of the motor 2 is fixedly connected with a rotating column 22; a rotating cavity is formed in the shell 1; a rotary table 23 is rotatably connected inside the rotating cavity, and the lower surface of the rotating column 22 penetrates through the shell 1 and is fixedly connected with the upper surface of the rotary table 23; a rotating groove is formed in the lower surface of the rotating disc 23 at the axis position of the rotating disc 23; the feeding pipe 3 is rotatably connected inside the rotating groove, the feeding pipe 3 downwards penetrates through the shell 1 and extends to the lower position of the shell 1, and the feeding pipe 3 is fixedly connected with the shell 1; the axial line of the feeding pipe 3 is designed into an L-shaped structure; the right end face of the feeding pipe 3 is fixedly connected with an air pipe 31; an air shaft 32 is rotatably connected inside the air pipe 31; the surface of the wind shaft 32 is fixedly connected with uniformly arranged fan blades 33; a spiral accelerating channel 24 is formed in the rotating disc 23, and the accelerating channels 24 are on the same horizontal plane; a circle of uniformly arranged feeding holes are formed in the inlet of the feeding pipe 3 at the accelerating channel 24; a discharge hole is formed in the outer arc surface of the shell 1 at the position of the turntable 23; a discharge pipe 13 is fixedly connected to the outer arc surface of the shell 1 at the position of the discharge hole; when the impeller head works, after the steel structure workpiece is machined, the problem of residual stress or stress concentration occurs on the surface of steel, so that the stress can be slowly released in the long-term use process, and further the steel structure is damaged, and the problem of steel plate fracture is caused, in the prior art, the current common mode for removing the stress of the steel structure workpiece is to control the spraying speed of shot blasting abrasive materials through an impeller head and an impeller head in the impeller head, the existing impeller head on the market basically adopts a vane type, the shot blasting abrasive materials are rapidly accelerated through the rotation of the vane, and meanwhile, the spraying speed of the shot blasting abrasive materials can be controlled through controlling the rotating speed of the vane, but when the vane type impeller head centrifugally accelerates the shot blasting abrasive materials, a large amount of shot blasting abrasive materials directly impact the vane, so that the problems of serious damage to the vane and the like can occur after long-term use, therefore, according to the shot blasting method for removing the stress of the steel structure workpiece, when the shot blasting machine is needed, the power supply is started firstly through the shot blasting machine used in the method, so that the air shaft 32 rotates, the air shaft 32 and the fan blade 33 carried by the air shaft rotate, the generated pressure difference drives shot blasting grinding materials to enter the feeding pipe 3, meanwhile, the motor 2 rotates, the output shaft of the motor 2 drives the rotary table 23 in the shell 1 to rotate, therefore, due to the pressure difference, air flow drives the shot blasting grinding materials to enter the accelerating channel 24 through the feeding hole, due to the rapid rotation of the rotary table 23, the spiral accelerating channel 24 can rapidly and centrifugally accelerate the shot blasting grinding materials, finally, the high-speed shot blasting grinding materials can enter the discharging pipe 13 through the discharging hole 13, the high-speed shot blasting grinding materials are led out through the discharging pipe 13, and the leading-out speed of the shot blasting grinding materials can be effectively controlled by controlling the rotation of the rotary table 23, meanwhile, the centrifugal acceleration mode avoids direct impact between shot blasting grinding materials and a power acceleration movement mechanism, and avoids the influence of high-speed impact on a movement part.
As an embodiment of the present invention, a plurality of acceleration channels 24 are formed inside the turntable 23, and the acceleration channels 24 are respectively located at different horizontal height positions; the inlet pipe 3 is provided with a plurality of circles of uniformly arranged feed inlets at the inlet positions of the acceleration channels 24; the steel grit can be discharged from the outlets of all the accelerating channels 24 through the same discharging pipe 13; during operation, because carousel 23 is inside only single passageway 24 with higher speed, consequently the discharge gate of passageway 24 with higher speed can only be the discontinuous derivation shot-blasting abrasive material, consequently when throwing the ball to the surface of work piece and handling, shot-blasting abrasive material blowout continuity is relatively poor, consequently the sustainable shot-blasting treatment ability to the work piece is not enough, especially can appear throwing the change problem that rocks and distance appear between twice, consequently can appear the work piece surface treatment discontinuous problem easily, consequently through setting up a plurality of passageways 24 with higher speed, entry through a plurality of passageways 24 with higher speed is located different positions, consequently realize a plurality of passageways 24 with higher speed to the alternate acceleration of shot-blasting abrasive material, realize the sustainable jet capacity with higher speed of shot-blasting abrasive material.
As an embodiment of the present invention, the exit positions of the acceleration channels 24 are provided with sealing baffles 25; the sealing baffle 25 is connected with the rotary disc 23 in a sliding way, and a spring 26 is fixedly connected at the connection part; a convex ball 27 is arranged on the side surface of the sealing baffle 25 opposite to one side of the intrados of the shell 1; during operation, after the acceleration channel 24 completes the acceleration operation once, the outlet of the acceleration channel 24 contacts and seals with the inside of the housing 1 and rotates relatively, but when the shot blasting abrasive is located between the housing 1 and the rotary table 23, a relatively serious abrasion problem is easily caused between two contact surfaces, and the sealing performance is poor, so by arranging the sealing baffle 25, after the completion of the single acceleration operation, the convex ball 27 on the surface of the sealing baffle 25 contacts with the inner surface of the housing 1, and thus the sealing baffle 25 can be automatically driven to slide, so as to realize the quick and effective sealing of the outlet position of the acceleration channel 24, when the outlet of the acceleration channel 24 rotates to the discharge pipe 13 position again, the convex block can be separated from the inner surface of the housing 1, so that under the elastic force of the spring 26, the sealing baffle 25 slides again, the outlet of the acceleration channel 24 opens again, and the cycle is performed in turn, the automatic opening and closing of the acceleration channel 24 is realized.
As an embodiment of the present invention, the outer arc surface of the sealing baffle 25 is provided with a ball groove at the position of the convex ball 27; the convex balls 27 are in rolling connection with the inner parts of the corresponding ball grooves; during operation, because be sliding friction between the internal surface of convex ball 27 and casing 1, consequently last the use back, can make the internal surface of convex ball 27 or casing 1 produce serious wearing and tearing problem, consequently set up the ball groove on the surface of seal baffle 25, through the inside roll connection of convex ball 27 at the ball groove, consequently can realize roll connection between the internal surface of convex ball 27 and casing 1, reduce the wearing and tearing problem by a wide margin, improve the life of impeller head.
As an embodiment of the present invention, the rotary disc 23 is provided with a sealing groove at the sealing position of the corresponding sealing baffle 25; sealing gaskets 28 are arranged inside the sealing grooves; the sealing gasket 28 is made of soft rubber material; the during operation, because throw the high-speed injection needs of ball abrasive material, consequently, need carousel 23 to carry out high-speed rotation, realize the high-speed acceleration to the peening, but carousel 23 high-speed motion, can make protruding ball 27 drive seal flap 25 fast and slide, consequently, can make when seal flap 25 closes, produce great impact between sealed archives and the carousel 23, consequently, through seting up the seal groove, through the inside sealed pad 28 that links firmly at the seal groove, sealed pad 28 can effectually play the cushioning effect, reduce seal flap 25's impact force, also can promote seal flap 25's sealed effect simultaneously.
As an embodiment of the present invention, the sealing gaskets 28 are slidably connected with the corresponding sealing grooves; a first telescopic rod 29 is fixedly connected between each sealing gasket 28 and the bottom of the corresponding sealing groove, and a piston rod of each first telescopic rod 29 is fixedly connected with the corresponding sealing gasket 28; a second telescopic rod 210 is arranged above the feed inlet; the piston rods of the second telescopic rods 210 are fixedly connected with baffle plates 211; in operation, when the sealing flap 25 closes the outlet of the acceleration channel 24, the inlet of the acceleration channel 24 remains open, so that a large amount of blasting abrasives continuously enter the inside of the acceleration channel 24 and are accelerated by the acceleration channel 24, accumulated at the outlet of the acceleration channel 24, when the sealing baffle 25 is opened again, a large amount of shot blasting grinding materials are sprayed out instantly, which is not beneficial to the uniformity of the sprayed shot blasting grinding materials, therefore, by arranging the first telescopic rod 29, the second telescopic rod 210 and the baffle 211, the first telescopic rod 29 is compressed by the sealing baffle 25, and then the gas in the first telescopic link 29 can enter the inside of the second telescopic link 210, and the second telescopic link 210 can drive the baffle 211 to eject out, so as to realize the automatic closing of the inlet of the acceleration channel 24, thereby realizing the opening and closing synchronization of the inlet and the outlet of the acceleration channel 24.
The specific working process is as follows:
when the shot blasting machine is in use, firstly, the power supply is started, so that the air shaft 32 rotates, the air shaft 32 and the fan blades 33 arranged on the air shaft rotate, the generated pressure difference can drive shot blasting grinding materials to enter the feeding pipe 3, meanwhile, the motor 2 rotates, the output shaft of the motor 2 drives the rotary table 23 in the shell 1 to rotate, therefore, due to the pressure difference, air flow can drive the shot blasting grinding materials to enter the accelerating channel 24 through the feeding hole, due to the rapid rotation of the rotary table 23, the spiral accelerating channel 24 can lead the shot blasting grinding materials to be rapidly and centrifugally accelerated, finally, the high-speed shot blasting grinding materials can enter the discharging pipe 13 through the discharging hole, the discharging pipe 13 can lead out the high-speed grinding materials, the leading-out speed of the shot blasting grinding materials can be effectively controlled by controlling the rotation of the rotary table 23, and meanwhile, the centrifugal accelerating mode avoids the direct impact between the shot blasting grinding materials and the power accelerating movement mechanism, the influence of high-speed impact on a moving part is avoided; by arranging the plurality of acceleration channels 24 and arranging the inlets of the plurality of acceleration channels 24 at different positions, the plurality of acceleration channels 24 alternately accelerate shot blasting abrasives, and the sustainable accelerated jet capability of the shot blasting abrasives is realized; by arranging the sealing baffle 25, after finishing single acceleration work, the convex ball 27 on the surface of the sealing baffle 25 can be in contact with the inner surface of the shell 1, so that the sealing baffle 25 can be automatically driven to slide, the outlet position of the acceleration channel 24 can be quickly and effectively sealed, when the outlet of the acceleration channel 24 rotates to the discharge pipe 13 again, the convex block can be separated from the inner surface of the shell 1, so that under the action of the elastic force of the spring 26, the sealing baffle 25 slides again, the outlet of the acceleration channel 24 is opened again, and the sequential circulation is realized, and the automatic opening and closing of the acceleration channel 24 is realized; by arranging the sealing groove and fixedly connecting the sealing gasket 28 in the sealing groove, the sealing gasket 28 can effectively play a role in buffering, and the impact force of the sealing baffle 25 is reduced; through setting up first telescopic link 29, second telescopic link 210 and baffle 211, can make first telescopic link 29 produce the compression through seal baffle 25, and then the inside that the inside gas of first telescopic link 29 can enter into second telescopic link 210, and second telescopic link 210 can drive baffle 211 ejecting, realizes the self-closing to accelerateing the passageway 24 entry.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. A shot blasting method for removing stress of a steel structure workpiece is characterized by comprising the following steps: the shot blasting method comprises the following steps:
s1: putting a workpiece into a degreasing agent solution for degreasing treatment, then putting the workpiece into clear water for washing, taking out the workpiece, blowing off water on the surface of the workpiece by using compressed air, and then putting the workpiece into a drying chamber for drying until the water content of the workpiece is less than 0.3 wt%;
s2: selecting a mixed abrasive consisting of steel grit and steel shots as a shot blasting abrasive, screening the mixed abrasive into uniform granularity by using a screen, cleaning, drying and then putting into a shot blasting device;
s3: after the shot blasting machine is debugged, placing the dried workpiece in a shot blasting chamber, adjusting the rotating speed of the shot blasting machine according to the thickness of the part of the workpiece facing the shot blasting machine, performing shot blasting treatment, turning over the workpiece after the shot blasting of the part is finished, facing the other part of the workpiece to a nozzle of the shot blasting machine, adjusting the rotating speed of the shot blasting machine according to the thickness of the part of the workpiece, performing shot blasting treatment, and turning over the workpiece until all parts of the workpiece are subjected to shot blasting treatment;
s4: after the shot blasting is finished, cleaning pills on the surface of the workpiece by using a rolling brush, blowing off attachments on the surface of a steel plate by using a blowing device, inspecting the workpiece, checking whether the surface of the workpiece has no oil, rust or oxide skin, and checking whether the surface roughness of the workpiece meets the requirement;
the shot blasting device used in the S3 comprises a shell (1), a motor (2) and a feeding pipe (3); the shell (1) is designed into a cylindrical structure; the lower surface of the shell (1) is fixedly connected with supporting legs (11) which are uniformly arranged at the position close to the outer cambered surface of the shell (1); the upper surface of the shell (1) is fixedly connected with a mounting cover (12); the mounting cover (12) is internally and horizontally fixedly connected with a mounting plate (21); the upper surface of the mounting plate (21) is fixedly connected with a motor (2); the output shaft of the motor (2) penetrates through the mounting plate (21) and extends to the position below the mounting plate (21); an output shaft of the motor (2) is fixedly connected with a rotating column (22); a rotating cavity is formed in the shell (1); a rotary table (23) is rotatably connected inside the rotary cavity, and the lower surface of the rotary column (22) penetrates through the shell (1) and is fixedly connected with the upper surface of the rotary table (23); a rotating groove is formed in the lower surface of the rotating disc (23) at the axis position of the rotating disc (23); the feeding pipe (3) is rotatably connected inside the rotating groove, the feeding pipe (3) downwards penetrates through the shell (1) and extends to the position below the shell (1), and the feeding pipe (3) is fixedly connected with the shell (1); the axial line of the feeding pipe (3) is designed into an L-shaped structure; the right end face of the feeding pipe (3) is fixedly connected with an air pipe (31); an air shaft (32) is rotatably connected inside the air pipe (31); the surface of the wind shaft (32) is fixedly connected with uniformly arranged fan blades (33); a spiral accelerating channel (24) is formed in the turntable (23), and the accelerating channels (24) are on the same horizontal plane; a circle of uniformly arranged feeding holes are formed in the inlet of the feeding pipe (3) at the accelerating channel (24); a discharge hole is formed in the outer arc surface of the shell (1) at the position of the turntable (23); a discharge pipe (13) is fixedly connected to the outer arc surface of the shell (1) at the position of the discharge hole;
sealing baffles (25) are arranged at the outlet positions of the accelerating channels (24); the sealing baffle plate (25) is connected with the rotary disc (23) in a sliding manner, and a spring (26) is fixedly connected at the connection part; and a convex ball (27) is arranged on the side surface of the sealing baffle plate (25) opposite to one side of the inner cambered surface of the shell (1).
2. The shot blasting method for removing the stress of the steel structure workpiece as recited in claim 1, wherein: a plurality of accelerating channels (24) are formed in the turntable (23), and the accelerating channels (24) are respectively positioned at different horizontal height positions; the inlet positions of the feed pipes (3) at the inlets of the acceleration channels (24) are provided with a plurality of circles of uniformly arranged feed inlets; the outlets of all the accelerating channels (24) can discharge steel sand through the same discharging pipe (13).
3. The shot blasting method for removing the stress of the steel structure workpiece as recited in claim 1, wherein: the outer arc surface of the sealing baffle plate (25) is provided with a ball groove at the position of the convex ball (27); the convex balls (27) are in rolling connection with the inner parts of the corresponding ball grooves.
4. The shot blasting method for removing the stress of the steel structure workpiece as recited in claim 3, wherein: sealing grooves are formed in the sealing positions of the corresponding sealing baffles (25) of the rotary table (23); sealing gaskets (28) are arranged inside the sealing grooves; the sealing gasket (28) is made of soft rubber materials.
5. The shot blasting method for removing the stress of the steel structure workpiece as recited in claim 4, wherein the shot blasting method comprises the following steps: the sealing gaskets (28) are in sliding connection with the corresponding sealing grooves; a first telescopic rod (29) is fixedly connected between each sealing gasket (28) and the corresponding groove bottom of each sealing groove, and a piston rod of each first telescopic rod (29) is fixedly connected with the corresponding sealing gasket (28); a second telescopic rod (210) is arranged above the feed inlet; and piston rods of the second telescopic rods (210) are fixedly connected with baffle plates (211).
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| CN115091368B (en) * | 2022-05-20 | 2024-03-01 | 神州伟业建设集团有限公司 | Large-scale oil storage tank body rust cleaning device |
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| US5725154A (en) * | 1995-08-18 | 1998-03-10 | Jackson; David P. | Dense fluid spray cleaning method and apparatus |
| DE19838733C1 (en) * | 1998-08-26 | 1999-11-25 | Jost Wadephul | Thrower wheel for sprayer |
| JP2011056625A (en) * | 2009-09-10 | 2011-03-24 | Sintokogio Ltd | Shot blast device |
| CN101954622A (en) * | 2010-06-17 | 2011-01-26 | 无锡市合力机电成套设备厂 | Rotary impeller type shot blasting machine |
| CN204397638U (en) * | 2015-01-05 | 2015-06-17 | 西安科技大学 | A kind of contour peening device of composite bimetal pipe |
| CN107671736A (en) * | 2017-11-13 | 2018-02-09 | 江苏飞腾铸造机械有限公司 | One kind improves steel plate impeller blasting technique |
| CN107891374A (en) * | 2017-11-14 | 2018-04-10 | 江苏飞腾铸造机械有限公司 | A kind of Shot Blasting technique |
| CN110524435A (en) * | 2019-09-30 | 2019-12-03 | 深圳市鑫意晟科技有限公司 | Impeller head and shot blasting method |
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Effective date of registration: 20211110 Address after: 010010 east of No. 6 road, Jinshan Development Zone, Hohhot City, Inner Mongolia Autonomous Region Applicant after: Inner Mongolia xinyuansheng steel structure color steel Engineering Co., Ltd Address before: 247099 Tiandu Tsinghua Park, No. 2, Changjiang North Road, Guichi District, Chizhou City, Anhui Province Applicant before: Zhao Wei |
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