A metal coating spraying process for piston rod surface

Abstract

The invention relates to the technical field of metal surface spraying, and discloses a piston rod surface metal coating spraying processing technology, which comprises: S1. clamping and centering the piston rod: placing the piston rod in a protective box, the piston rod is located between a fixed clamping column and a dynamic clamping column for centering; S2. cleaning the piston rod of impurities and spraying the metal coating: S3. blowing and cooling the surface of the piston rod. When the surface of the piston rod is subjected to metal spraying, the piston rod is placed between a fixed clamping column and a dynamic clamping column, then a lifting mechanism drives a push plate 2 to move downward, the dynamic clamping column and the fixed clamping column clamp the piston rod, a centering ring can center the piston rod, a shifting mechanism drives a cleaning ring to move downward, a brush inside the cleaning ring cleans the surface impurities of the piston rod, a spray gun sprays the metal coating on the surface of the piston rod, and a motor drives the fan blades to rotate, so as to facilitate cooling the surface of the piston rod.

Description

Technical Field

[0001] The invention relates to the technical field of metal surface spraying, and in particular to a metal coating spraying process for a piston rod surface. Background Art

[0002] The piston rod is a common connecting component in modern society. It often plays a transmission role, transmitting the force on the piston and driving the piston to move. The existing piston rod is often composed of a cylinder barrel, a cylinder rod, a piston, and an end cover. In order to increase the service life of the piston rod, a metal coating is often sprayed on the surface of the piston rod to increase the surface strength of the piston rod. Before spraying the piston rod, the piston rod needs to be clamped. However, when clamping the piston rod, it is not convenient to center the piston rod, and clamping the piston rod will interfere with the spraying of the piston rod. Impurities on the surface of the piston rod will also affect the spraying effect of the piston rod. Summary of the invention

[0003] In order to solve the deficiencies of the prior art, the purpose of the present invention is to provide a metal coating spraying process for the surface of a piston rod.

[0004] In order to achieve the above technical objectives, the technical solution adopted by the present invention is as follows.

[0005] A metal coating spraying process for piston rod surface: the process includes:

[0006] S1. Clamping and centering of the piston rod: Place the piston rod in the protective box, and center the piston rod between the fixed clamping column and the dynamic clamping column;

[0007] S2. Clean the impurities on the piston rod and spray the metal coating;

[0008] S3. Cool the surface of the piston rod with air.

[0009] As a further improvement of the present technical scheme, a fixed clamping column is in a protective box body, and the fixed clamping column is arranged at the bottom of the protective box body, and is rotatably connected with the bottom of the protective box body; a lifting mechanism is arranged in the protective box body and at the top of the protective box body; a push plate 1 is horizontally arranged at the bottom of the lifting mechanism, and a push plate 2 is arranged parallel to the lower part of the push plate 1; a connecting sleeve 1 is vertically arranged at the bottom of the push plate 1, and two connecting sleeves 1 are arranged in parallel; a connecting column 1 is vertically fixed on the top of the push plate 2, and the top of the connecting column 1 extends into the connecting sleeve 1; a spring 1 is arranged on the connecting sleeve 1 and the connecting column 1, one end of the spring 1 is connected to the bottom of the push plate 1, and the other end of the spring 1 is connected to the top of the push plate 2; the dynamic clamping column is arranged at the bottom of the push plate 2, and is rotatably connected with the push plate 2; the dynamic clamping column is directly above the fixed clamping column, and the ends of the fixed clamping column and the dynamic clamping column are both conical; a spray cleaning mechanism is arranged below the push plate 2, and the spray cleaning mechanism is used to perform surface metal spraying on the piston rod.

[0010] As a further improvement of the present technical solution, a shifting mechanism is provided on one side of the push plate one, and a spray cleaning mechanism is provided on the shifting mechanism. The shifting mechanism can drive the spray cleaning mechanism to move up and down. The spray cleaning mechanism includes a cleaning ring and a spray gun. The cleaning ring is provided at the bottom of the shifting mechanism and is coaxially arranged with the dynamic clamping column. The cleaning ring is close to the bottom of the dynamic clamping column. A brush is provided on the inner ring surface of the cleaning ring. The spray gun is provided on one side of the cleaning ring. A motor is provided on the plate surface of the push plate two. The output shaft of the motor is vertically downward. A coaxial fixed sleeve at the output shaft end of the motor is provided with a gear one, and a coaxial fixed sleeve on the dynamic clamping column is provided with a gear two, and the gear two is meshed with the gear one.

[0011] As a further improvement of the present technical solution, the shifting mechanism includes a mounting plate, a shifting plate, a second guide column, an electric winding drum, and a pull rope. The mounting plate is fixedly arranged on one side of the push plate one, the mounting plate includes a horizontal plate and a vertical plate, the electric winding drum is arranged on the horizontal plate of the mounting plate, the shifting plate is below the horizontal plate of the mounting plate, the shifting plate is fixedly connected to the cleaning ring, the bottom of the second guide column is fixedly connected to the shifting plate, the top of the second guide column passes through the horizontal plate of the mounting plate and is provided with a baffle, two second guide columns are provided and are arranged in parallel, a second spring is sleeved on the second guide column, one end of the second spring contacts the top of the shifting plate, and the other end of the second spring contacts the bottom of the horizontal plate of the mounting plate. In the initial state, the second spring is in a compressed state, one end of the pull rope is wound around the electric winding drum, and the other end of the pull rope is fixedly connected to the shifting plate.

[0012] As a further improvement of the present technical solution, a blowing shell is fixedly arranged above the cleaning ring. The blowing shell is a circular shell. The blowing shell and the cleaning ring are coaxially arranged. An exhaust port is opened on the inner ring surface of the blowing shell. There are multiple exhaust ports and they are evenly arranged around. A accommodating shell is arranged at the bottom of the push plate 2. The accommodating shell and the blowing shell are connected by a connecting pipe. The output shaft end of the motor is coaxially fixedly connected with a rotating shaft. The end of the rotating shaft extends into the accommodating shell. The end of the rotating shaft is provided with a fan blade.

[0013] As a further improvement of the present technical solution, a centering mechanism is provided in the protective box, and the centering mechanism is located at the bottom of the protective box. The centering mechanism includes a centering ring, a second connecting column, a second connecting sleeve, and a centering assembly. The centering ring is located above the fixed clamping column, and the centering ring is coaxially arranged with the fixed clamping column. The second connecting column is vertically provided at the bottom of the centering ring. Two connecting columns are provided and arranged in parallel. The second connecting sleeve is vertically provided at the bottom of the protective box. Two connecting sleeves are provided and arranged in parallel. The bottom of the second connecting column is sleeved in the second connecting sleeve, and the second connecting column and the second connecting sleeve are sleeved with a spring three, one end of the spring three is connected to the bottom of the centering ring, and the other end of the spring three is connected to the bottom of the protective box. The centering assembly is provided on the centering ring.

[0014] As a further improvement of the present technical solution, three groups of centering components are provided, and the centering components include a guide column, a connecting column, and a ball bearing. The guide column is arranged horizontally, a baffle is provided at one end of the guide column, and the other end of the guide column passes through the centering ring. The end of the guide column is connected to the connecting column, and a ball bearing is rotatably provided at the end of the connecting column.

[0015] As a further improvement of the technical solution, a pressure plate is horizontally arranged on one side of the center ring, and the vertical plate of the mounting plate extends vertically downward, and the vertical plate of the mounting plate is located directly above the pressure plate.

[0016] As a further improvement of the technical solution, the top of the protective box is connected to an air inlet pipe, and an exhaust fan is arranged on the air inlet pipe, so that inert gas can be filled into the protective box through the air inlet pipe.

[0017] Compared with the prior art, the present invention has the following progress and advantages: during the use of the present invention, when the surface of the piston rod is metal-sprayed, the piston rod is placed between the fixed clamping column and the dynamic clamping column, and then the lifting mechanism drives the push plate 2 to move downward, the dynamic clamping column and the fixed clamping column clamp the piston rod, and the centering ring can center the piston rod;

[0018] The shifting mechanism drives the cleaning ring to move downward, and the brush inside the cleaning ring cleans the impurities on the surface of the piston rod. The spray gun sprays the metal coating on the surface of the piston rod. The motor drives the fan blades to rotate, so that the wind is discharged through the exhaust port of the blowing shell, thereby blowing the sprayed piston rod surface, which is convenient for cooling the piston rod surface.

[0019] During the spraying process of the piston rod, the centering assembly is separated from the piston rod to prevent the spray gun from interfering with the spraying of the piston rod surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 It is a schematic diagram of the installation of the dynamic clamping column of the present invention.

[0023] Figure 3 It is a schematic diagram of the shifting mechanism of the present invention.

[0024] Figure 4 It is a schematic diagram of the spray cleaning mechanism of the present invention.

[0025] Figure 5 It is a schematic diagram of the cooperation between the cleaning ring and the blowing shell of the present invention.

[0026] Figure 6 It is a schematic diagram of the cooperation between the fan blade and the blowing housing of the present invention.

[0027] Figure 7 It is a schematic diagram of the centering mechanism of the present invention.

[0028] Figure 8 It is a schematic diagram of the centering component of the present invention.

[0029] The figure shows:

[0030] 10. Protective box; 110. Fixed clamping column; 120. Dynamic clamping column; 121. Motor; 122. Gear 1; 123. Gear 2; 130. Lifting mechanism; 140. Push plate 1; 141. Connecting sleeve 1; 142. Connecting column 1; 150. Push plate 2; 160. Air intake pipe; 170. Centering mechanism; 171. Centering ring; 172. Connecting column 2; 173. Connecting sleeve 2; 174. Press plate; 180. Centering assembly; 181. Guide column 1; 182. Connecting column; 183. Ball bearing;

[0031] 20. Spray cleaning mechanism; 210. Cleaning ring; 211. Brush; 220. Spray gun; 230. Blowing housing; 231. Exhaust port; 232. Accommodating housing; 233. Connecting pipe; 234. Fan blade;

[0032] 30. Shifting mechanism; 310. Mounting plate; 320. Shifting plate; 330. Second guide post; 340. Electric winding reel; 350. Pull rope. DETAILED DESCRIPTION

[0033] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0034] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0035] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inside", "outside", etc. appear to indicate the orientation or position relationship, it is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0036] In the description of the present invention, unless otherwise clearly specified and limited, if the term "connection" or the like appears to indicate the connection relationship between components, the term should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two components or the interaction relationship between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] A metal coating spraying process for the piston rod surface comprises the following steps:

[0038] S1. Clamping and centering the piston rod: The piston rod is placed in the protective box 10, and the piston rod is centered between the fixed clamping column 110 and the dynamic clamping column 120;

[0039] S2. Clean the impurities on the piston rod and spray the metal coating;

[0040] S3. Cool the surface of the piston rod with air.

[0041] like Figure 1-Figure 8 As shown, the fixed clamping column 110 is in the protective box 10, the fixed clamping column 110 is arranged at the bottom of the protective box 10, the fixed clamping column 110 is rotatably connected to the bottom of the protective box 10, the lifting mechanism 130 (which is the prior art and is not described in detail) is arranged in the protective box 10 and is at the top of the protective box 10, a push plate 140 is horizontally arranged at the bottom of the lifting mechanism 130, a push plate 2 150 is arranged parallel to the push plate 140, a connecting sleeve 141 is vertically arranged at the bottom of the push plate 140, two connecting sleeves 141 are arranged in parallel, and a connecting column 141 is vertically fixedly arranged on the top of the push plate 2 150 2. The top of the connecting column 142 extends into the connecting sleeve 141. The connecting sleeve 141 and the connecting column 142 are provided with a spring 1. One end of the spring 1 is connected to the bottom of the push plate 140, and the other end of the spring 1 is connected to the top of the push plate 2 150. The dynamic clamping column 120 is arranged at the bottom of the push plate 2 150. The dynamic clamping column 120 and the push plate 2 150 are rotatably connected. The dynamic clamping column 120 is located directly above the fixed clamping column 110. The ends of the fixed clamping column 110 and the dynamic clamping column 120 are both conical. A spray cleaning mechanism 20 is arranged below the push plate 2 150. The spray cleaning mechanism 20 is used to perform surface metal spraying on the piston rod.

[0042] More specifically, a shift mechanism 30 is provided on one side of the push plate 140, and a spray cleaning mechanism 20 is provided on the shift mechanism 30. The shift mechanism 30 can drive the spray cleaning mechanism 20 to move up and down. The spray cleaning mechanism 20 includes a cleaning ring 210 and a spray gun 220. The cleaning ring 210 is provided at the bottom of the shift mechanism 30 and is coaxially arranged with the dynamic clamping column 120. The cleaning ring 210 is close to the bottom of the dynamic clamping column 120. A brush 211 is provided on the inner ring surface of the cleaning ring 210. The spray gun 220 is provided on one side of the cleaning ring 210. A motor 121 is provided on the plate surface of the push plate 2 150. The output shaft of the motor 121 is vertically downward, and the output shaft end of the motor 121 is coaxial with the fixing sleeve A gear 122 is provided, and a coaxial fixed sleeve on the dynamic clamping column 120 is provided with a gear 2 123, and the gear 2 123 is meshed with the gear 122. When the surface of the piston rod is metal-sprayed, the piston rod is placed between the fixed clamping column 110 and the dynamic clamping column 120, and then the lifting mechanism 130 drives the push plate 2 150 to move downward, and the dynamic clamping column 120 and the fixed clamping column 110 clamp the piston rod, and then the motor 121 drives the dynamic clamping column 120 to rotate, thereby driving the piston rod to rotate, and then the shifting mechanism 30 drives the cleaning ring 210 to move downward, and the brush 211 inside the cleaning ring 210 cleans the surface impurities of the piston rod, and the spray gun 220 sprays the metal coating on the surface of the piston rod.

[0043] like Figure 3-Figure 4As shown, the shift mechanism 30 includes a mounting plate 310, a shift plate 320, a guide column 330, an electric wire winding drum 340, and a pull rope 350. The mounting plate 310 is fixedly arranged on one side of the push plate 140. The mounting plate 310 includes a horizontal plate and a vertical plate. The electric wire winding drum 340 is arranged on the horizontal plate of the mounting plate 310. The shift plate 320 is located below the horizontal plate of the mounting plate 310. The shift plate 320 is fixedly connected to the cleaning ring 210. The bottom of the guide column 330 is fixedly connected to the shift plate 320. The top of the guide column 330 passes through the horizontal plate of the mounting plate 310 and is provided with a baffle. The guide column 330 is provided with two And they are arranged in parallel, a spring 2 is sleeved on the guide column 230, one end of the spring 2 contacts the top of the shift plate 320, and the other end of the spring 2 contacts the bottom of the horizontal plate of the mounting plate 310. In the initial state, the spring 2 is in a compressed state, one end of the pull rope 350 is wound around the electric winding drum 340, and the other end of the pull rope 350 is fixedly connected to the shift plate 320. After the piston rod is clamped, the electric winding drum 340 works, and the elastic force of the spring 2 pushes the shift plate 320 to move downward, thereby pushing the cleaning ring 210 to move downward, so as to clean the surface impurities of the piston rod, and the spray gun 220 sprays the metal coating on the surface of the piston rod.

[0044] More specifically, a blowing shell 230 is fixedly provided above the cleaning ring 210. The blowing shell 230 is a circular shell. The blowing shell 230 and the cleaning ring 210 are coaxially arranged. An exhaust port 231 is provided on the inner ring surface of the blowing shell 230. There are multiple exhaust ports 231 and they are evenly arranged around. A accommodating shell 232 is provided at the bottom of the push plate 150. The accommodating shell 232 is connected to the blowing shell 230 through a connecting pipe 233. The output shaft end of the motor 121 is coaxially fixedly connected with a rotating shaft. The end of the rotating shaft extends into the accommodating shell 232. The end of the rotating shaft is provided with a fan blade 234. The motor 121 drives the fan blade 234 to rotate, so that wind is discharged through the exhaust port 231 of the blowing shell 230, thereby blowing the surface of the piston rod after spraying, which is convenient for cooling the surface of the piston rod.

[0045] More specifically, a centering mechanism 170 is provided in the protective box 10, and the centering mechanism 170 is located at the bottom of the protective box 10. The centering mechanism 170 includes a centering ring 171, a second connecting column 172, a second connecting sleeve 173, and a centering assembly 180. The centering ring 171 is located above the fixed clamping column 110, and the centering ring 171 is coaxially arranged with the fixed clamping column 110. The second connecting column 172 is vertically arranged at the bottom of the centering ring 171, and the second connecting column 172 is arranged There are two connecting sleeves 173 arranged in parallel, and the connecting sleeves 173 are vertically arranged at the bottom of the protective box 10. Two connecting sleeves 173 are arranged in parallel, and the bottom of the connecting column 172 is sleeved in the connecting sleeve 173. The connecting column 172 and the connecting sleeve 173 are sleeved with a spring 3, one end of the spring 3 is connected to the bottom of the centering ring 171, and the other end of the spring 3 is connected to the bottom of the protective box 10. The centering component 180 is arranged on the centering ring 171.

[0046] More specifically, the centering assembly 180 is provided with three groups, and the centering assembly 180 includes a guide column 181, a connecting column 182, and a ball 183. The guide column 181 is arranged horizontally, and a baffle is provided at one end of the guide column 181, and the other end of the guide column 181 passes through the centering ring 171. The end of the guide column 181 is connected to the connecting column 182, and the end of the connecting column 182 is rotatably provided with a ball 183. When the piston rod is clamped, the piston rod is placed in the centering ring 171, and the connecting columns 182 of the three groups of centering assemblies 180 center the piston rod.

[0047] More specifically, a pressure plate 174 is horizontally arranged on one side of the centering ring 171, and the vertical plate of the mounting plate 310 extends vertically downward, and the vertical plate of the mounting plate 310 is directly above the pressure plate 174. After the piston rod is clamped, the lifting mechanism 130 drives the push plate 140 to continue to move downward, thereby driving the mounting plate 310 to move downward, and then the vertical plate of the mounting plate 310 contacts the pressure plate 174, thereby driving the centering ring 171 to move downward, so that the centering component 180 is separated from the piston rod, avoiding the spray gun 220 from interfering with the surface spraying of the piston rod.

[0048] More specifically, the top of the protective box 10 is connected to an air inlet pipe 160 , on which an exhaust fan is provided. Inert gas can be filled into the protective box 10 through the air inlet pipe 160 , thereby preventing the piston rod from rusting in a high temperature environment.

[0049] Working principle:

[0050] During the use of the present invention, when the piston rod is subjected to surface metal spraying, the piston rod is placed between the fixed clamping column 110 and the dynamic clamping column 120, and then the lifting mechanism 130 drives the second push plate 150 to move downward, and the dynamic clamping column 120 and the fixed clamping column 110 clamp the piston rod, and then the motor 121 drives the dynamic clamping column 120 to rotate, thereby driving the piston rod to rotate, and then the shifting mechanism 30 drives the cleaning ring 210 to move downward, and the brush 211 inside the cleaning ring 210 cleans the surface impurities of the piston rod, and the spray gun 220 sprays the metal coating on the surface of the piston rod. After the piston rod is clamped, the electric winding disk 340 works, and the elastic force of the second spring pushes the shifting plate 320 to move downward, thereby pushing the cleaning ring 210 to move downward, so as to clean the surface impurities of the piston rod. In principle, the spray gun 220 sprays the metal coating on the surface of the piston rod, and the motor 121 drives the fan blade 234 to rotate, so that the wind is discharged through the exhaust port 231 of the blowing shell 230, so as to blow the sprayed surface of the piston rod, which is convenient for cooling the surface of the piston rod. When the piston rod is clamped, the piston rod is placed in the centering ring 171, and the connecting column 182 of the three groups of centering components 180 centers the piston rod. After the clamping of the piston rod is completed, the lifting mechanism 130 drives the push plate 140 to continue to move downward, thereby driving the mounting plate 310 to move downward, and then the vertical plate of the mounting plate 310 contacts the pressure plate 174, thereby driving the centering ring 171 to move downward, so that the centering component 180 is separated from the piston rod, avoiding the spray gun 220 from interfering with the surface spraying of the piston rod.

[0051] It should be noted that the above specific implementations are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art should understand that various modifications, equivalent substitutions, changes, etc. can be made to the present invention. However, as long as these changes do not deviate from the spirit of the present invention, they should be within the scope of protection of the present invention. In addition, some terms used in the specification and claims of this application are not restrictive, but are only for the convenience of description.

Claims

1. A metal coating spraying process for a piston rod surface, the process comprising the following specific steps: S1. Clamping and centering of the piston rod: Place the piston rod in the protective box, and center the piston rod between the fixed clamping column and the dynamic clamping column; S2. Clean the impurities on the piston rod and spray the metal coating; S3. Blow air to cool the surface of the piston rod; The fixed clamping column is in the protective box body, and the fixed clamping column is arranged at the bottom of the protective box body, and the fixed clamping column is rotatably connected with the bottom of the protective box body. A lifting mechanism is arranged in the protective box body and at the top of the protective box body, and a push plate 1 is horizontally arranged at the bottom of the lifting mechanism, and a push plate 2 is arranged parallel to the lower side of the push plate 1, and a connecting sleeve 1 is vertically arranged at the bottom of the push plate 1, and the connecting sleeve 1 is provided with two and are arranged in parallel, and a connecting column 1 is vertically fixedly arranged on the top of the push plate 2, and the top of the connecting column 1 extends into the connecting sleeve 1, and a spring 1 is provided on the connecting sleeve 1 and the connecting column 1, one end of the spring 1 is connected to the bottom of the push plate 1, and the other end of the spring 1 is connected to the top of the push plate 2, and the dynamic clamping column is arranged at the bottom of the push plate 2, and the dynamic clamping column is rotatably connected with the push plate 2, and the dynamic clamping column is directly above the fixed clamping column, and the ends of the fixed clamping column and the dynamic clamping column are both conical, and a spray cleaning mechanism is arranged below the push plate 2, and the spray cleaning mechanism is used for surface metal spraying of the piston rod; A shifting mechanism is arranged on one side of the push plate 1, and a spray cleaning mechanism is arranged on the shifting mechanism. The shifting mechanism can drive the spray cleaning mechanism to move up and down. The spray cleaning mechanism includes a cleaning ring and a spray gun. The cleaning ring is arranged at the bottom of the shifting mechanism and is coaxially arranged with the dynamic clamping column. The cleaning ring is close to the bottom of the dynamic clamping column. A brush is arranged on the inner ring surface of the cleaning ring. The spray gun is arranged on one side of the cleaning ring. A motor is arranged on the plate surface of the push plate 2. The output shaft of the motor is vertically downward. A coaxial fixed sleeve at the output shaft end of the motor is provided with a gear 1. A coaxial fixed sleeve on the dynamic clamping column is provided with a gear 2. The gear 2 is meshed with the gear 1. The shifting mechanism comprises a mounting plate, a shifting plate, a second guide column, an electric winding drum, and a pull rope. The mounting plate is fixedly arranged on one side of the push plate one, the mounting plate comprises a horizontal plate and a vertical plate, the electric winding drum is arranged on the horizontal plate of the mounting plate, the shifting plate is below the horizontal plate of the mounting plate, the shifting plate is fixedly connected to a cleaning ring, the bottom of the second guide column is fixedly connected to the shifting plate, the top of the second guide column passes through the horizontal plate of the mounting plate and is provided with a baffle, two second guide columns are provided and are arranged in parallel, a second spring is sleeved on the second guide column, one end of the second spring contacts the top of the shifting plate, and the other end of the second spring contacts the bottom of the horizontal plate of the mounting plate. In the initial state, the second spring is in a compressed state, one end of the pull rope is wound around the electric winding drum, and the other end of the pull rope is fixedly connected to the shifting plate; A centering mechanism is provided in the protection box, and the centering mechanism is located at the bottom of the protection box. The centering mechanism includes a centering ring, a second connecting column, a second connecting sleeve, and a centering component. The centering ring is located above the fixed clamping column, and the centering ring and the fixed clamping column are arranged coaxially. The second connecting column is vertically provided at the bottom of the centering ring. Two connecting columns are provided and arranged in parallel. The second connecting sleeve is vertically provided at the bottom of the protection box. Two connecting sleeves are provided and arranged in parallel. The bottom of the second connecting column is sleeved in the second connecting sleeve. The second connecting column and the second connecting sleeve are sleeved with a spring. One end of the spring is connected to the bottom of the centering ring, and the other end of the spring is connected to the bottom of the protection box. The centering component is provided on the centering ring. A pressing plate is horizontally arranged on one side of the center ring, and a vertical plate of the mounting plate extends vertically downward, and the vertical plate of the mounting plate is located directly above the pressing plate.

2. The metal coating spraying process for the piston rod surface according to claim 1 is characterized in that: There are three groups of centering components, which include a guide column, a connecting column, and a ball. The guide column is arranged horizontally, a baffle is provided at one end of the guide column, and the other end of the guide column passes through the centering ring. The end of the guide column is connected to the connecting column, and a ball is rotatably provided at the end of the connecting column.

3. The metal coating spraying process for the piston rod surface according to claim 2 is characterized in that: A blowing shell is fixedly arranged above the cleaning ring. The blowing shell is a circular shell. The blowing shell and the cleaning ring are coaxially arranged. An exhaust port is opened on the inner ring surface of the blowing shell. There are multiple exhaust ports and they are evenly arranged around. A accommodating shell is arranged at the bottom of the push plate 2. The accommodating shell and the blowing shell are connected by a connecting pipe. The output shaft end of the motor is coaxially fixedly connected with a rotating shaft. The end of the rotating shaft extends into the accommodating shell. The end of the rotating shaft is provided with a fan blade.

4. The metal coating spraying process for the piston rod surface according to claim 3 is characterized in that: The top of the protection box is connected with an air inlet pipe, on which an exhaust fan is arranged, and inert gas can be filled into the protection box through the air inlet pipe.

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