718 results about "Angle grinder" patented technology

The invention is suitable for the technical field of aluminum alloy welding, and provides an aluminum alloy pipeline welding device and a welding method thereof.The aluminum alloy pipeline welding device comprises a welding unit and a slow cooling unit; the welding unit comprises a supporting frame, a displacement air cylinder, a displacement sliding block, an electric telescopic rod, a rotating disc, a sliding rail, an electric sliding block, an adjusting piece and a welding gun. The slow cooling unit comprises a fixing plate, a fixing block, a telescopic air cylinder, a telescopic plate, an arc-shaped rail, an electric arc block, a heating plate and an electric heating wire. The four to-be-welded areas of the aluminum alloy pipeline and the flange are divided, the four to-be-welded areas do not make contact with spot welding on the formal welding path, welding operation continues after impurities on the surface of the spot welding area are ground through the angle grinder, and therefore the strength and the sealing performance of a welding seam are improved, and the welding efficiency is improved. And the welding quality of the welding position of the aluminum alloy pipeline and the flange is improved.

The invention belongs to the technical field of surface strengthening, and particularly relates to an aluminum alloy friction stir welding seam fatigue-free method based on rolling strengthening. The method comprises the following steps: (1) carrying out a microhardness test and a tensile test on an aluminum alloy matrix to obtain the hardness and tensile strength of the matrix; and (2) friction stir welding is conducted. The tensile strength after friction stir welding is not lower than 65% of the fatigue strength of a base body by adjusting friction stir welding process parameters; and (3) the surface of the friction stir welding part is treated. The surface of the welding seam is polished through an angle grinder and abrasive paper, so that the surface roughness of the welding seam reaches about Ra1.2 microns; and (4) rolling surface strengthening is carried out. Surface strengthening process parameters are adjusted, so that the surface hardness of a heat affected zone of the weld joint subjected to surface strengthening is not lower than the surface hardness of a matrix, the surface roughness Ra is not higher than 0.5 mu m, and the surface residual compressive stress is not lower than 100 MPa; and (5) carrying out a fatigue test.

The invention discloses a steel formwork surface treatment robot based on magnetic adsorption wall climbing, and belongs to the technical field of polishing and cleaning, the steel formwork surface treatment robot comprises a walking chassis and a polishing head, the polishing head is composed of a support, a flexible screw-down mechanism and an angle grinder, the support is arranged on the walking chassis, and the angle grinder is arranged on the support through the flexible screw-down mechanism; the flexible pressing mechanism is composed of a vertical frame, a U-shaped supporting plate, a triangular groove frame, an H-shaped double-fork arm, an adjustable damping spring and a connecting plate. The vertical frame is connected with the U-shaped supporting plate so as to clamp the angle grinder. The triangular groove frame is hinged to the U-shaped supporting plate through a fourth hinge shaft. The H-shaped two-fork arm is rotationally connected with the connecting plate and is hinged with the two vertical frames through a second hinge shaft and a third hinge shaft respectively; the two ends of the adjustable damping spring are hinged to the fifth hinge shaft and the connecting plate correspondingly, and the connecting plate is fixedly connected to the support. The first hinge shaft and the second hinge shaft of the triangular groove frame are rotationally connected to the support. According to the robot, efficient and stable automatic grinding and cleaning operation can be achieved in the complex construction environment, and the risk and cost of manual operation are reduced.

The utility model belongs to the technical field of gear ring machining, and particularly relates to gear ring polishing and deburring equipment which comprises a rack serving as a connecting base frame, a supporting component connected to the rack and a motor installed at the bottom of the rack, the output end of the motor is connected with the input end of a transmission, and the transmission is connected to the outer side of the rack. The output end of the transmission is connected with the rotating seat, the rotating seat is rotationally connected to the top of the rack, the clamping seat is arranged at the top of the rotating seat, the angle grinding component is connected to the rack and grinds a gear ring arranged on the clamping seat, the motor drives the rotating seat to rotate from the top of the rack, the gear ring arranged on the clamping seat rotates at a constant speed, and the grinding efficiency is improved while subsequent uniform grinding is facilitated. The first air cylinder drives the angle grinder connected to the outer side of the first movable plate to horizontally move along the outer side of the support, then the height of the angle grinder is changed, the position of an angle grinding piece is conveniently adjusted, and follow-up angle grinding operation is facilitated.

The invention provides a 60NiTi alloy high-purity preparation and rolling forming method. The 60NiTi alloy high-purity preparation and rolling forming method comprises the steps that firstly, raw material treatment is conducted, wherein the surface of a raw material is cleaned; step 2, vacuum induction suspension smelting; step 3, annealing treatment; step 4, pretreatment before rolling; fifthly, rolling forming is carried out; and sixthly, the sheath is removed, specifically, the sheath is cut off through an angle grinder, and the internal 60NiTi alloy plate is obtained. According to the method, a low-C-content high-quality cast ingot is prepared through a vacuum suspension smelting process of vacuum-pulsed magnetic field composite degassing, and a rolling forming process is adjusted according to the millisecond-level rapid precipitation characteristic of a Ni4Ti3 phase in the alloy and the metal flowing behavior in the plastic forming process; the problems that in the alloy rapid forming process, hard phase rapid precipitation and recrystallization are difficult are solved, the defects of non-uniform crystal grains, transverse cracks, longitudinal cracks and crocodile opening type cracks in the rolling process are avoided, and the 60NiTi alloy rolled plate uniform in microstructure and excellent in comprehensive performance is obtained.

The invention provides chip angle grinding equipment and a grinding method, the chip angle grinding equipment comprises an angle grinding base and an angle grinding body, and a first roller and a second roller are connected with a grinding belt in a winding manner. The angle grinder body drives the first rolling wheel and the second rolling wheel to rotate synchronously, so that the grinding belt can continuously and stably grind the side face of the chip. And through cooperation of the first rolling wheel and the second rolling wheel, the grinding belt can uniformly distribute grinding force on a large contact area, and the grinding efficiency is improved. The angle grinder base is adopted as an integral supporting structure, and the angle grinder body and the workbench are mounted on the angle grinder base, so that the whole equipment is compact in structure, small in occupied space and convenient to integrate into a production line. The grinding belt is adopted for grinding, compared with a rigid grinding wheel, the contact face of the grinding belt is good in flexibility, grinding force can be distributed more evenly, the risk that chips are damaged due to impact or stress concentration is reduced, and therefore the yield of chip machining is effectively increased.

The utility model discloses a device for processing a hook spring workpiece, the hook spring is a C-shaped structural member formed by folding a steel belt and stamping, the device comprises a bottom plate, a workpiece positioning seat and a support frame, the workpiece positioning seat and the support frame are arranged on the bottom plate, the workpiece positioning seat is used for accommodating and fixing the hook spring workpiece, and the support frame is used for supporting the hook spring workpiece. The supporting frame is movably connected with the bottom plate through a rotating shaft, an angle grinder is fixedly installed on the supporting frame, the supporting frame is pulled by hand to make the supporting frame move around the shaft relative to the rotating shaft, the angle grinder can be driven to move, the angle grinder gradually gets close to the workpiece positioning base, and then the periphery of a grinding wheel is used for conducting cutting type grinding on the tail end of a hook spring workpiece. The tail end of the hook spring workpiece can be quickly and accurately processed, and the processed end face is very smooth, so that the processing efficiency and the processing precision are greatly improved, and the abrasion to a grinding wheel is reduced.

The utility model discloses a grinding wheel cover connecting mechanism arranged on an angle grinder, which comprises a mounting plate and a ring sleeve, one end of a rotating shaft extending into a grinding wheel cover is fixedly provided with a saw grinding sheet, and the mounting plate is provided with a groove connecting part around the ring sleeve. A protruding part extending out of the surface of the inner wall of the mounting plate is arranged at the position, corresponding to the groove connecting part, of the inner wall of the mounting plate, a wear-resisting distance increasing cushion cover is arranged between the protruding part and the saw grinding piece, and the outer circumference of the saw grinding piece extends out of the edge of the protruding part; the groove connecting part is arranged on the outer wall of the mounting plate on the side wall of the grinding wheel cover, the end part of the transmission mechanism is fixed on the groove connecting part through the ring sleeve, the protruding part on the inner wall of the mounting plate extends out of the back surface of the groove connecting part, and the protruding part extends out of the outer circumference of the saw grinding sheet; the gap between the saw grinding piece and the inner wall of the mounting plate is increased through the protruding part, and the edge wiping phenomenon of the saw grinding piece is avoided under the condition that the power of the saw grinding piece is not increased.

The utility model relates to an angle grinder quick-change grinding wheel cover, which comprises a protective cover, an elastic limiting mechanism and a head shell mechanism, the protective cover is C-shaped, the head shell mechanism comprises a front cover and a bottom cover, the front cover is fixedly arranged above the bottom cover, the bottom cover is fixedly arranged in an angle grinder head, an assembly part is arranged at the bottom of the protective cover, and the elastic limiting mechanism is arranged on the assembly part. Width limiting rib plates are arranged at the two ends of the assembling part, the front cover is provided with two flat squares matched with the width limiting rib plates, and the assembling part is detachably connected with the front cover; the assembling part is further provided with more than one limiting hole matched with the elastic limiting mechanism, the elastic limiting mechanism is fixedly installed in the bottom cover, and the end portion of the elastic limiting mechanism and the limiting hole are clamped and limited in a matched mode. According to the utility model, rapid assembly and disassembly and position adjustment of the protective cover can be realized.

The utility model relates to a cable cutting device which comprises an angle grinder, a guide assembly, a clamping assembly, a cutter feeding assembly and a protective shell, the angle grinder comprises an electric angle grinder and a cutting blade, the electric angle grinder drives the cutting blade to rotate, the protective shell wraps the outer surface of the cutting blade, the clamping assembly and the cutter feeding assembly are installed on the protective shell, and the cutter feeding assembly is installed on the protective shell. The feed assembly moves along the guide assembly. According to the cable cutting device, the rechargeable lithium battery angle grinder is adopted as cutting power, the problem that a hydraulic cutting nipper and an electric grinding machine (floor type) depend on an alternating current power supply or an engine is solved, the cable cutting device is more suitable for outdoor or field construction environments, and the weight of a tool is greatly reduced.

The utility model relates to the technical field of angle grinders, in particular to a vibration and noise reduction angle grinder which comprises a main body, a motor is installed on the inner side of the main body, an outer cover is fixedly installed on the lower side of the head end of the main body, a grinding piece is installed on the lower side of the outer cover, and a handle is fixedly installed on the front face of the head end of the main body. A vibration reduction structure is installed on the outer side of the handle and comprises a fixing block, the fixing block is fixedly connected to the front face of the handle, limiting sliding blocks are arranged on the two sides of the front end of the fixing block, vibration reduction springs are fixedly connected to the upper face and the lower face of the fixing block, and a damper is installed on one side of each vibration reduction spring. According to the angle grinder, the vibration reduction structure is installed on the handle at the head end of the main body, the influence on the hand pressing the head end of the angle grinder during vibration can be greatly relieved, meanwhile, the outer cover can be better attached to the machining face by pressing the vibration reduction structure, the use effect of the angle grinder is further guaranteed, and the angle grinder is more practical.

The present invention provides a grinding device, relating to the technical field of machining machinery. The grinding device comprises a mounting frame, a slewing bearing, and an angle grinder. The slewing bearing is mounted on the mounting frame, and the angle grinder is mounted on the slewing bearing. The slewing bearing can drive the angle grinder to perform a slewing motion about the slewing bearing's rotational centerline. The mounting frame is used to connect a grinding workpiece. This alleviates technical problems in the prior art, such as safety hazards when grinding a grinding workpiece, the tendency to cause arm soreness in workers, and consequently, low grinding accuracy.

The utility model provides a curbstone renovating machine, which relates to the technical field of road maintenance equipment, and comprises two groups of angle grinders and an angle grinder handheld frame, the angle grinder handheld frame consists of an upper plate and a side plate, the angle grinders are respectively arranged on the inner sides of the upper plate and the side plate, the upper plate and the side plate are rotatably connected through a rotating shaft, and the rotating shaft is connected with the angle grinder handheld frame. Angle adjusting structures are arranged among the upper plate, the side plates and the rotating shaft, and moving wheels are arranged at the ends, away from the rotating shaft, of the upper plate and the side plates; according to the curbstone renovating machine, by improving a traditional renovating mode, the effects of double-face synchronous renovating, angle adjustability, convenient and fast movement and high safety are achieved, and the curbstone renovating machine plays a positive role in improving the curbstone renovating efficiency and maintaining the city image.

The utility model discloses an angle grinder protective cover structure which comprises a protective cover which is of an annular structure, a grinding groove is formed in one side of the protective cover, a fixing assembly is arranged on the protective cover, a protective assembly is arranged in the protective cover and driven by a driving assembly, and the driving assembly comprises a rotary knob. A mounting hole is formed in the protective cover, a knob is arranged in the hole, a rotating groove is formed in the protective cover, a gear is arranged at the bottom of the knob, the gear is rotationally connected into the rotating groove, and a first rack and a second rack are arranged on the two sides of the gear and are of an annular structure. By rotating the knob, the gear drives the rack I and the rack II to drive the annular protection piece to rotate, so that the angle grinder shield can adjust the size of an opening, and the size of a cutting opening of an angle grinder can be conveniently adjusted according to a machining type.

The invention relates to the technical field of electric tools, and discloses a self-cleaning type single brushless angle grinder for metal cutting, which comprises a main body, the side wall of the main body is rotatably connected with a rotating shaft, and the self-cleaning type single brushless angle grinder further comprises a movement mechanism, and the movement mechanism is arranged in the main body and is used for rotating when the main body moves. When the elastic plates incline, metal chips can be guided to enter the elastic plate of the next stage, the movement process of the previous elastic plate can be repeated after the elastic plates make contact with the chips, and therefore the chips swung when the cutting blade rotates are collected and cleaned; the situation that when a connecting pipe absorbs and cleans metal chippings in the protective sleeve through a dust collector connected with the connecting pipe, the rotating speed of a cutting blade is too high, so that the connecting pipe cannot completely absorb the chippings, and consequently part of the chippings continuously rotate in the protective sleeve is reduced, and the chipping cleaning effect of the device is enhanced; and the internal cleaning quality of the device during operation is improved.

The utility model belongs to the technical field of grinding devices, and particularly relates to a grinding device for clutch shaft machining, which comprises a worktable, a left guide rail fixedly mounted on the left side of the top surface of the worktable, a right guide rail fixedly mounted on the right side of the top surface of the worktable, a left sliding seat movably embedded on the top surface of the left guide rail, and an outer diameter grinding motor fixedly mounted at the top end of the left sliding seat. Outer diameter grinding discs are fixedly installed at the two ends of an output shaft of the outer diameter grinding motor, a right sliding base is movably embedded in the top face of the right guide rail, an angle grinder is fixedly installed at the top end of the right sliding base through a horizontal base, and an output shaft of the angle grinder is fixedly connected with a notch grinding disc. The outer diameter grinding disc and the notch grinding disc are installed on the two sides of the workbench, the outer circle face and a spline notch of a clutch shaft can be ground by clamping the clutch shaft once, the grinding efficiency of the clutch shaft can be improved, and the grinding precision of the clutch shaft can also be improved.

The utility model relates to the technical field of electric tool testing, in particular to angle grinder rotating speed testing equipment. Comprising a mounting bottom plate, and further comprises placing station frames which are arranged at the top of the mounting bottom plate in a left-right spaced mode and used for placing and supporting angle grinders; the clamping mechanisms are arranged at the top of the mounting bottom plate in a left-right spaced mode and used for clamping and fixing the angle grinder; the downward pressing mechanism is arranged at the transmission end of the clamping mechanism on the right side and used for pressing a start button on the angle grinder so that the angle grinder can operate. And the rotating speed detection mechanism comprises a supporting frame, an encoder and a hose, the supporting frame is installed at the left end of the top of the installation bottom plate, the encoder is arranged at the top of the supporting frame, the hose is arranged at the detection shaft end of the encoder, and the lower end of the hose is connected with an output shaft of the angle grinder. According to the utility model, the rotation speed of the angle grinder can be automatically detected, the test efficiency is improved, and the test result is accurate and objective.

The high-efficiency grinding device provided by the application comprises a track group, a clamping assembly, a grinding frame, and a plane grinding assembly and a chamfer grinding assembly arranged on the grinding frame. The plane grinding assembly comprises at least two plane grinders, the chamfer grinding assembly comprises at least two chamfer grinders, the chamfer grinder comprises a lifting support and an angle grinder support, and a chamfer grinder head, the lifting support is arranged on the grinding frame in a lifting manner, the angle grinder support is arranged on the lifting support in a rotating manner, the rotating center line of the angle grinder support is vertical, and the chamfer grinder head can rotate to the left side and the right side of the rotating center line along the angle grinder support. The grinding device adopting the scheme can simultaneously perform grinding operations on two square silicon rods, and can perform grinding operations on other two square silicon rods after the grinding frame moves. Compared with the prior art, the production rate is doubled, and the space occupied does not need to be doubled relative to the original cutting and grinding all-in-one machine. The application also provides a cutting and grinding all-in-one machine using the high-efficiency grinding device.

The present invention relates to a high-efficiency angle grinder vibration test method. The specific steps include: S1, positioning the angle grinder vibration test equipment; S2, positioning the angle grinder and horizontally positioning the angle grinder on the angle grinder vibration test equipment; S3, starting the angle grinder. Under the no-load operating condition of the angle grinder, the vibration signals at each measuring point position are collected by a triaxial acceleration sensor, and the collected time-domain data is analyzed and calculated through the dynamic test analysis platform software and displayed; S4, the angle grinder vibration test equipment drives the angle grinder to move uniformly in the horizontal direction to realize the vibration test at each measuring point position of the grinder under the grinding working condition; S5, the angle grinder vibration test equipment drives the angle grinder to move uniformly in the horizontal direction to realize the vibration test at each measuring point position of the grinder under the cutting working condition. The present invention has the following advantages: It changes the traditional arm vibration test method and avoids the influence on the test accuracy caused by uncontrollable factors such as the arm grasping posture, grasping force, and grasping position during the test.

The utility model provides an angle grinder press plate and an angle grinder wrench, which comprise a circular press plate body, the center of the press plate body is provided with an internal threaded hole, and the upper side surface of the press plate body is uniformly provided with a plurality of polygonal counter bores to form a multi-surface contact structure of the press plate and the wrench so as to effectively prevent slipping during assembly and disassembly. The distances between the polygonal counter bores and the center of the nut body are equal. The polygonal counter bore is formed in the angle grinder pressing plate and is matched with the angle grinder wrench with the polygonal stud, so that a multi-surface contact structure of the polygonal counter bore and the polygonal stud is formed.

The invention discloses a multifunctional polishing accessory for an angle grinder, and aims to solve the technical problems that an existing polishing tool is single in operation mode and cannot meet the multifunctional polishing requirement. The multifunctional polishing accessory comprises an input connecting unit, a dustproof shield, an eccentric mounting seat, a bearing mounting seat, an eccentric adjusting element, a bearing part, a polishing disc mounting seat, a polishing disc and the like. The position of the bearing mounting seat is adjusted through the eccentric adjusting element, two concentric and eccentric polishing modes are achieved, and the eccentric distance is adjustable. The connecting ring is connected with the angle grinder shaft neck part, the connecting plate is connected with the dustproof shield, and the structure is simple and reliable. The polishing accessory can meet diversified operation requirements, and the connecting mode is fast, simple and convenient. And meanwhile, the dustproof shield is provided with a dust removal connector and a rubber sleeve, so that the use convenience and safety are improved. The polishing accessory has the advantages of multifunctionality, usability, high efficiency and the like, has high compatibility and operation efficiency, and expands the polishing application scene of the angle grinder.

The angle grinder comprises a grinder body and a driving motor arranged on the upper portion of an inner cavity of the grinder body, an output shaft of the driving motor is horizontally arranged left and right, the right end of the output shaft of the motor penetrates through the side wall of the grinder body, and the output shaft of the motor is rotationally connected with the side wall of the grinder body through a bearing. A threaded rod is coaxially fixed to the right end of the output shaft of the motor and coaxially sleeved with an abrasive disc, the left end face of the abrasive disc is tightly attached to the inner ring of the bearing, the right end face of the abrasive disc abuts against a nut arranged at the right end of the threaded rod, and the threaded rod is detachably connected with the nut through threads. A nut anti-loosening mechanism is further arranged at the right end of the nut and used for limiting rotation of the nut along the threads. The grinding disc can be tightly connected with the threaded rod through the nut in the working process through the nut anti-loosening mechanism, the grinding disc is prevented from loosening due to external force impact and rotation speed change, the service life of the grinding disc is prolonged, and the assembly efficiency of the grinding disc is improved.

The utility model discloses an angle grinder work piece bracket and angle grinder relates to instrument maintenance technical field, including: bracket body, bracket body includes connecting portion, abutting portion and groove-shaped notch, connecting portion is used for detachable fixed connection with angle grinder's nose, groove-shaped notch is used for the cutting blade of angle grinder to pass through, and the abutting portion is used for abutting against the groove-shaped notch. And the abutting part is used for abutting against an object needing to be cut, the structure is simple, the cutting device can be suitable for being used by common staff for cutting, and the working efficiency is effectively improved.

The application discloses a flat head angle grinder, which comprises a machine body shell, a motor, a transmission assembly shell and a transmission assembly. The machine body shell comprises a motor mounting cavity. The motor is arranged in the motor mounting cavity and comprises a motor output shaft. The transmission assembly shell comprises a transmission cavity, and the transmission cavity is communicated with the motor mounting cavity. The transmission assembly is arranged in the transmission cavity and comprises a first transmission shaft, a first transmission wheel, a second transmission wheel and a grinding wheel shaft. The first transmission wheel is sleeved on one end of the first transmission shaft away from the motor. The second transmission wheel is engaged with the first transmission wheel. The grinding wheel shaft is connected with the second transmission wheel at one end. The grinding wheel is connected with one end of the grinding wheel shaft away from the second transmission wheel. The application solves the problem that the grinding wheel of the existing angle grinder is inconvenient to work in a narrow and long working environment.

1. Name of the product in this design: Angle grinder. 2. Purpose of this design: Power tools for polishing, grinding, and cutting. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The utility model relates to the technical field of adjustable angle grinders, and discloses an adjustable lithium battery charging type angle grinder which comprises a machine shell, an empty groove is formed in the rear side of the interior of the machine shell, a pull rod is slidably connected to the interior of the empty groove, a tension spring is arranged on the periphery of the pull rod in a sleeved mode, and a limiting piece is fixedly connected to the front side of the tension spring. A connecting block is fixedly connected to the left side of the machine shell, a fixing block is fixedly connected to the right side of the connecting block, a fan-shaped sliding plate is fixedly connected to the right side of the fixing block, a rotating rod is fixedly connected to the middle of the fan-shaped sliding plate, and the front end and the rear end of the rotating rod are rotationally connected into the machine shell; the left side of the connecting block is fixedly connected with a first connecting shell. According to the angle grinder, the pull rod is pulled to drive the limiting piece to move, when the pull rod moves to a proper position, the pull rod slides out of the fan-shaped sliding plate, when the pull rod slides out of the fan-shaped sliding plate, the fan-shaped sliding plate can rotate through the rotating rod, and therefore the effect of adjusting the angle of the angle grinder is achieved.

The utility model belongs to the field of copper wire brushes, and particularly relates to a wire twisting pen type copper wire brush for an angle grinder, which comprises a copper wire brush body, the top of the copper wire brush body is in contact with a connecting seat, a round rod is slidably sleeved in the connecting seat, and a plurality of uniformly distributed fixing rods are fixedly connected in the round rod. A spring is arranged on the outer side of the fixing rod, the outer side of the fixing rod is slidably connected with an arc-shaped block in a sleeving mode, the arc-shaped block is slidably connected with the round rod, and the arc-shaped block is slidably connected with the connecting base. The arc-shaped block is inserted into the arc-shaped groove in the connecting seat, so that the round rod can be fixedly connected with the connecting seat, the round rod can be connected with the angle grinder for use, the ejector block can extrude the arc-shaped block when the push ring is pushed to move upwards, the arc-shaped block can be separated from the arc-shaped groove, and the round rod can be pulled out from the interior of the connecting seat immediately. And the round rod is convenient to overhaul and maintain, and is prevented from being damaged to influence connection and use with the angle grinder.

1. The name of this design product: Anti-lock angle grinder pressure plate. 2. The purpose of this design product: to facilitate the loading and unloading of angle grinder saw blades. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

The invention discloses a construction method of a radiation refrigeration film on an outer layer of a concrete retaining structure, which is characterized by comprising the following steps: S1, polishing and filling: polishing a tip bulge on the concrete retaining structure by using an angle grinder, and pouring and leveling by using a silicone adhesive; s2, surface hardening treatment: spraying or roll-coating a surface hardening agent; s3, cleaning: cleaning the surface of the concrete by using a high-pressure water gun after airing; s4, treating the surface by using an interface treating agent: roll-coating the interface treating agent; s5, film pasting is conducted, specifically, a radiation refrigeration film is laid, one side of the radiation refrigeration film is sequentially provided with a pasting adhesive layer and a release protection film from inside to outside, after the release protection film is stripped, the radiation refrigeration film is pasted to the concrete treated in the step S4 through the pasting adhesive layer, the radiation refrigeration film is more smoothly pasted and better bonded, and the radiation refrigeration film is more uniform in thickness and better in adhesion performance. And the coating is not easy to fall off during long-term use.