A high-speed laser cladding wear-resistant and anti-corrosion layer production process and equipment for oil pumping polished rods

Abstract

A high-speed laser cladding wear-resistant and anti-corrosion layer production process and equipment for oil pumping polished rods, which has the following steps: 1) Sanding - grinding the part of the oil pumping polished rod to be clad on a sand grinder so that the outer circle reaches the preset diameter, while removing surface impurities and reducing surface roughness; 2) Clamping - clamping the sanded oil pumping polished rod to the polished rod bearing device; 3) Laser cladding - using a high-energy laser beam to clad the anti-corrosion and wear-resistant alloy layer on the surface of the preheated oil pumping polished rod. The present invention has a novel structure and ingenious conception. It uses an electromagnetic induction heating device to preheat the oil pumping polished rod, and then uses a high-energy laser beam to clad the alloy powder on the surface of the oil pumping polished rod to form a metallurgically bonded nickel-based alloy layer. Through the above-mentioned production process and equipment, the current situation of the traditional spray welding oil pumping polished rod production process being complicated, low powder utilization, and high equipment power consumption has been changed, the process has been simplified, costs have been saved, and it has extensive economic and social benefits.

Description

Technical Field

[0001] The invention relates to the technical field of oil pumping polished rods, and in particular to a production process and equipment for a high-speed laser cladding wear-resistant and corrosion-resistant layer of an oil pumping polished rod. Background Art

[0002] In crude oil production, the pumping rod, as the first rod at the top of the pumping rod string, not only has to bear the weight of the lower rod string, but also has to connect to the ground power equipment for continuous reciprocating or rotating motion. During the motion, the pumping rod will inevitably rub against the oil pipe outside it and the rubber oil seal at the wellhead, resulting in a reduced service life of the pumping rod.

[0003] At present, the material of the pumping rod is mostly chromium-molybdenum alloy steel, and a high-strength pumping rod is obtained through a heat treatment process. In actual application, this pumping rod is not corrosion-resistant and wear-resistant, has a short service life, and seriously reduces the efficiency of oil production. If the pumping rod needs to have better corrosion resistance and wear resistance, nickel-based powder is generally sprayed on the surface of the pumping rod to metallurgically combine with the pumping rod matrix. Although the spray-welding nickel-based powder alloy improves the corrosion resistance and wear resistance, the existing pumping rod spray-welding process has low powder utilization and high heating temperature, which easily leads to waste of resources.

[0004] Therefore, it has become an urgent need in the industry to use green, environmentally friendly and energy-saving new equipment, improve the utilization rate of alloy powder, and simplify and optimize the process flow. Summary of the invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a high-speed laser cladding wear-resistant and anti-corrosion layer production process and equipment for oil pumping polished rods, which effectively solves the problems mentioned in the above technical background.

[0006] To achieve the above object, the present invention provides the following technical solution: The present invention comprises the following steps:

[0007] 1) Sand grinding: Grind the part of the oil pumping polished rod to be clad on the sand grinder to make the outer circle reach the preset diameter, remove surface impurities and reduce surface roughness;

[0008] 2) Clamping: Clamp the sanded pumping rod to the rod-bearing device;

[0009] 3) Laser cladding - using a high-energy laser beam, a corrosion-resistant and wear-resistant alloy layer is clad on the surface of the preheated pumping rod.

[0010] According to the above technical scheme: the specific process of 1) sand grinding is: put the pumping polished rod into the sand grinder, set the sand disc speed to 800-3000r / min, the polished rod body speed to 100-400r / min, the polished rod travel speed to 0.5-2m / min, and sand grind the part of the polished rod to be clad.

[0011] According to the above technical solution: the specific process of clamping 2) is:

[0012] a) The rod head at the non-upsetting end of the pumping polished rod is connected to the spindle box of the polished rod bearing equipment through a fixed fixture, and the rod head at the upsetting end of the pumping polished rod is connected to the tailstock of the polished rod bearing equipment through a movable fixture. The tailstock is controlled by a hydraulic cylinder to straighten the polished rod;

[0013] b) A support platform is installed on the polished rod bearing equipment, and a pulley is installed on the support platform. During the processing, the pulley supports the oil pumping polished rod to ensure the stability of the polished rod's rotational movement.

[0014] According to the above technical solution: the specific process of 3) laser cladding is:

[0015] a) The electromagnetic induction heating device, powder feeder and laser are installed on the sliding platform of the laser cladding equipment, and the three move synchronously. The laser cladding equipment is placed in parallel with the light rod bearing equipment and linked through the operating table;

[0016] b) Processing program preparation: According to the parameters such as the outer diameter of the oil pumping polished rod, the length of the oil pumping polished rod, and the size of the light spot, the chuck speed is set to 15-30 r / min, and a spiral line processing program with a pitch of 1.5-3mm is prepared;

[0017] c) Drying of alloy powder: Place the alloy powder in a clean metal tray with a powder accumulation thickness of no more than 5mm. Place the metal tray in an electric heating box and dry it at 180-200℃ for 10-15min. After taking it out, immediately put it into the powder feeder;

[0018] d) Preheating: Start the polished rod bearing equipment and laser cladding equipment, set the current to 20-40A, and use the electromagnetic induction heating device to preheat the pumping rod to 180-220℃;

[0019] e) Laser cladding: Set the laser output power to 3-4kW, start the powder feeder, and perform alloy powder cladding according to the predetermined procedure.

[0020] A high-speed laser cladding wear-resistant and anti-corrosion layer production equipment for an oil pumping polished rod comprises a polished rod bearing device, a laser cladding device and an operating table, a supporting platform is slidably installed on the polished rod bearing device, a spindle box is arranged on the top of one end of the polished rod bearing device, a tailstock is installed on the top of the other end of the polished rod bearing device, a fixed tool is connected to the output shaft of the spindle box, the fixed tool fixes the oil pumping polished rod and drives the oil pumping polished rod to rotate, a hydraulic cylinder is installed on the tailstock, a movable tool is installed in the middle of the tailstock, the hydraulic cylinder controls the movement of the tailstock, the movable tool is connected to the other end of the oil pumping polished rod, two pulleys are symmetrically installed on the supporting platform, a sliding platform is slidably installed on the laser cladding device, a laser is installed on the sliding platform, a powder feeder is installed on one side of the laser, an electromagnetic induction heating device sleeved on the oil pumping polished rod is installed on one side of the powder feeder, and the operating table is used to compile a processing program.

[0021] According to the above technical solution, the oil pumping polished rod is composed of a middle oil pumping polished rod body, a non-upsetting end rod head arranged at one end of the oil pumping polished rod body, and an upsetting end rod head arranged at the other end of the oil pumping polished rod body.

[0022] Beneficial effects: The high-speed laser cladding wear-resistant and anti-corrosion layer production process and equipment for oil pumping polished rods provided by the present invention have the following beneficial effects:

[0023] 1. The laser cladding process directly melts the powder onto the surface of the pumping rod, eliminating the alloy powder pre-spraying process.

[0024] 2. Use electromagnetic induction heating device to preheat the oil pumping rod, which has concentrated energy and rapid heating. The infrared induction switch is used to control the preheating temperature, which is easy to realize automation.

[0025] 3. Laser cladding has concentrated energy, and only a small amount of energy input is needed to form a micro-molten pool on the surface of the pumping rod matrix, which can achieve high-speed processing. However, traditional spray welding remelting requires the pumping rod to be heated to about 1100°C as a whole to make the surface alloy powder molten, and the processing efficiency is low.

[0026] 4. The thickness of the cladding layer can be controlled by adjusting the laser power, spot size, powder feeding amount and other parameters. The alloy powder utilization rate is high and the thickness of the cladding layer is uniform. The thickness of the alloy layer of the traditional spray welding oil pumping polished rod can only be controlled by the thickness of the pre-sprayed alloy powder in the front process, which is greatly affected by human factors, has large errors and low utilization of alloy powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 The present invention Figure 1 The structural diagram of A in the figure;

[0030] Numbers in the figure: 1 polished rod carrying equipment, 2 laser cladding equipment, 3 supporting platform, 4 sliding platform, 5 fixed tooling, 6 movable tooling, 7 oil pumping polished rod, 7.1 oil pumping polished rod body, 7.2 oil pumping polished rod non-upsetting end rod head, 7.3 oil pumping polished rod upsetting end rod head, 8 pulley, 9 laser, 10 powder feeder, 11 electromagnetic induction heating device, 12 hydraulic cylinder, 13 tailstock, 14 spindle box, 15 operating table. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-2 The specific implementation modes of the present invention are described in further detail.

[0032] Depend on Figure 1-2 The present invention provides a high-speed laser cladding wear-resistant and anti-corrosion layer production process for a pumping rod, comprising the following steps:

[0033] 1) Sand grinding: Grind the part of the oil pumping polished rod to be clad on the sand grinder to make the outer circle reach the preset diameter, remove surface impurities and reduce surface roughness;

[0034] 2) Clamping: Clamp the sanded pumping rod to the rod-bearing device;

[0035] 3) Laser cladding - using a high-energy laser beam, a corrosion-resistant and wear-resistant alloy layer is clad on the surface of the preheated pumping rod.

[0036] The specific process of 1) sand grinding is: put the pumping polished rod into the sand grinder, set the sand plate speed to 800-3000r / min, the polished rod body speed to 100-400r / min, the polished rod travel speed to 0.5-2m / min, and sand grind the part of the polished rod to be clad.

[0037] The specific process of clamping 2) is as follows:

[0038] a) The rod head at the non-upsetting end of the pumping polished rod is connected to the spindle box of the polished rod bearing equipment through a fixed fixture, and the rod head at the upsetting end of the pumping polished rod is connected to the tailstock of the polished rod bearing equipment through a movable fixture. The tailstock is controlled by a hydraulic cylinder to straighten the polished rod;

[0039] b) A support platform is installed on the polished rod bearing equipment, and a pulley is installed on the support platform. During the processing, the pulley supports the oil pumping polished rod to ensure the stability of the polished rod's rotational movement.

[0040] The specific process of laser cladding is as follows:

[0041] a) The electromagnetic induction heating device, powder feeder and laser are installed on the sliding platform of the laser cladding equipment, and the three move synchronously. The laser cladding equipment is placed in parallel with the light rod bearing equipment and linked through the operating table;

[0042] b) Processing program preparation: According to the parameters such as the outer diameter of the oil pumping polished rod, the length of the oil pumping polished rod, and the size of the light spot, the chuck speed is set to 15-30 r / min, and a spiral line processing program with a pitch of 1.5-3mm is prepared;

[0043] c) Drying of alloy powder: Place the alloy powder in a clean metal tray with a powder accumulation thickness of no more than 5mm. Place the metal tray in an electric heating box and dry it at 180-200℃ for 10-15min. After taking it out, immediately put it into the powder feeder;

[0044] d) Preheating: Start the polished rod bearing equipment and laser cladding equipment, set the current to 20-40A, and use the electromagnetic induction heating device to preheat the pumping rod to 180-220℃;

[0045] e) Laser cladding: Set the laser output power to 3-4kW, start the powder feeder, and perform alloy powder cladding according to the predetermined procedure.

[0046] A high-speed laser cladding wear-resistant and anti-corrosion layer production device for an oil pumping polished rod comprises a polished rod bearing device 1, a laser cladding device 2 and an operating table 15, a supporting platform 3 is slidably installed on the polished rod bearing device 1, a spindle box 14 is arranged on the top of one end of the polished rod bearing device 1, a tailstock 13 is installed on the top of the other end of the polished rod bearing device 1, a fixed tool 5 is connected to the output shaft of the spindle box 14, a chuck is arranged on the fixed tool 5, the fixed tool 5 fixes the oil pumping polished rod 7 and drives the oil pumping polished rod 7 to rotate, and a tailstock 13 is installed on the tailstock 13. A hydraulic cylinder 12 is installed, and a movable tooling 6 is installed in the middle of the tailstock 13. The hydraulic cylinder 12 controls the movement of the tailstock 13. The movable tooling 6 is connected to the other end of the oil-extracting polished rod 7. Two pulleys 8 are symmetrically installed on the supporting platform 3. A sliding platform 4 is slidably installed on the laser cladding equipment 2. A laser 9 is installed on the sliding platform 4. A powder feeder 10 is installed on one side of the laser 9. An electromagnetic induction heating device 11 mounted on the oil-extracting polished rod 7 is installed on one side of the powder feeder 10. The operating table 15 is used to compile a processing program.

[0047] The oil pumping polished rod 7 comprises an oil pumping polished rod body 7.1 in the middle, a non-upsetting end rod head 7.2 arranged at one end of the oil pumping polished rod body 7.1, and an upsetting end rod head 7.3 arranged at the other end of the oil pumping polished rod body 7.1.

[0048] The specific process flow of the wear-resistant and anti-corrosion process for the oil pumping rod described in the present invention is: sand grinding - clamping - laser cladding. The process described in the present invention uses a high-energy laser beam to form a micro-molten pool on the surface of the oil pumping rod substrate. The self-fluxing alloy powder is injected into the molten pool through a powder feeder to melt, and forms a metallurgical bond with the substrate to form an anti-corrosion and wear-resistant layer with a certain thickness. The main equipment used in conjunction with this process includes: a sand grinder, a rod bearing device, a laser cladding device with an electromagnetic induction heating device, a powder feeder, and a laser. Through the above process and equipment, a dense metallurgically bonded anti-corrosion and wear-resistant layer can be formed on the surface of the oil pumping rod. Example

[0049] Depend on Figure 1 A high-speed laser cladding wear-resistant and anti-corrosion layer production process and equipment for oil pumping rods are provided, comprising: a rod bearing device 1, a laser cladding device 2, and an operating table 15. The rod bearing device 1 is equipped with a supporting platform 3, a spindle box 14, and a tailstock 13. The output shaft of the spindle box 14 is connected to a fixed tooling 5 to drive the oil pumping rod 7 to rotate. The tailstock 13 is equipped with a hydraulic cylinder 12 and a movable tooling 6. The hydraulic cylinder 12 controls the movement of the tailstock 13. The movable tooling 6 is connected to the other end of the oil pumping rod 7. The supporting platform 3 is equipped with a pulley 8. The laser cladding device 2 is equipped with a sliding platform 4. The sliding platform 4 is equipped with a laser 9, a powder feeder 10, and an electromagnetic induction heating device 11. The operating table 15 is used to compile a processing program. Example

[0050] A high-speed laser cladding wear-resistant and anti-corrosion layer production process and equipment for a pumping polished rod, using the equipment described in Example 1, comprising the following steps:

[0051] (1) Place the pumping rod 7 into a sand grinder, set the sanding disc speed to 1500 r / min, the pumping rod 7 body 7.1 speed to 300 r / min, and the rod travel speed to 1.5 m / min, and sand grind the part of the pumping rod 7 to be clad.

[0052] (2) The rod head 7.2 at the non-upsetting end of the pumping rod 7 is connected to the front chuck of the polished rod bearing device 1 through the fixed fixture 5, and the rod head 7.3 at the upsetting end of the pumping rod 7 is connected to the rear chuck of the polished rod bearing device 1 through the movable fixture 6.

[0053] (3) Set the chuck speed to 20 r / min and program a helical processing program with a pitch of 2.5 mm on operating table 15.

[0054] (4) Place the alloy powder in a clean metal tray with a powder accumulation thickness of 5 mm. Place the metal tray in an electric heating box and dry it at 200°C for 10 minutes. After taking it out, immediately place it in the powder feeder 10.

[0055] (5) Start the polished rod bearing device 1 and the laser cladding device 2. Set the current to 30A and preheat the pumping polished rod 7 to 200°C using the electromagnetic induction heating device 11.

[0056] (6) The output power of the laser 9 is set to 3 kW, the powder feeder 10 is started, the powder feeding rate is set to 30 g / min, and the alloy powder cladding is performed according to a predetermined procedure. Example

[0057] A high-speed laser cladding wear-resistant and anti-corrosion layer production process and equipment for a pumping polished rod, using the equipment described in Example 1, comprising the following steps:

[0058] (1) Place the pumping rod 7 into a sand grinder, set the sanding disc speed to 1500 r / min, the pumping rod 7 body 7.1 speed to 300 r / min, and the rod travel speed to 1.5 m / min, and sand grind the part of the pumping rod 7 to be clad.

[0059] (2) The rod head 7.2 at the non-upsetting end of the pumping rod 7 is connected to the front chuck of the polished rod bearing device 1 through the fixed fixture 5, and the rod head 7.3 at the upsetting end of the pumping rod 7 is connected to the rear chuck of the polished rod bearing device 1 through the movable fixture 6.

[0060] (3) Set the chuck speed to 25 r / min and program a helical machining program with a pitch of 2 mm on operating table 15.

[0061] (4) Place the alloy powder in a clean metal tray with a powder stacking thickness of 5 mm. Place the metal tray in an electric heating box and dry it at 190°C for 10 minutes. After taking it out, immediately place it in the powder feeder 10.

[0062] (5) Start the polished rod bearing device 1 and the laser cladding device 2. Set the current to 30A and preheat the pumping polished rod 7 to 200°C using the electromagnetic induction heating device 11.

[0063] (6) The output power of the laser 9 is set to 3.5 kW, the powder feeder 10 is started, the powder feeding rate is set to 30 g / min, and the alloy powder cladding is performed according to a predetermined procedure. Example

[0064] A high-speed laser cladding wear-resistant and anti-corrosion layer production process and equipment for a pumping polished rod, using the equipment described in Example 1, comprising the following steps:

[0065] (1) Place the pumping rod 7 into a sand grinder, set the sanding disc speed to 1500 r / min, the pumping rod 7 body 7.1 speed to 300 r / min, and the rod travel speed to 1.5 m / min, and sand grind the part of the pumping rod 7 to be clad.

[0066] (2) The rod head 7.2 at the non-upsetting end of the pumping rod 7 is connected to the front chuck of the polished rod bearing device 1 through the fixed fixture 5, and the rod head 7.3 at the upsetting end of the pumping rod 7 is connected to the rear chuck of the polished rod bearing device 1 through the movable fixture 6.

[0067] (3) Set the chuck speed to 30 r / min and program a helical processing program with a pitch of 1.5 mm on operating table 15.

[0068] (4) Place the alloy powder in a clean metal tray with a powder stacking thickness of 5 mm. Place the metal tray in an electric heating box and dry it at 180°C for 10 minutes. After taking it out, immediately place it in the powder feeder 10.

[0069] (5) Start the polished rod bearing device 1 and the laser cladding device 2. Set the current to 30A and preheat the pumping polished rod 7 to 200°C using the electromagnetic induction heating device 11.

[0070] (6) The output power of the laser 9 is set to 4 kW, the powder feeder 10 is started, the powder feeding rate is set to 30 g / min, and the alloy powder cladding is performed according to a predetermined procedure.

[0071] The anti-corrosion and wear-resistant oil pumping polished rods processed in the above embodiments 2 to 4 were tested for the hardness of the wear-resistant and anti-corrosion layer, the thickness of the wear-resistant and anti-corrosion layer, the powder utilization rate, and the surface quality. The specific test method is:

[0072] The hardness test of the anti-corrosion and wear-resistant layer shall be carried out in accordance with GB / T 4340.1 "Vickers hardness test for metallic materials Part 1: Test method".

[0073] The thickness of the anti-corrosion and wear-resistant layer is tested by measuring the difference in outer diameter of the pumping rod before and after laser remelting with a vernier caliper to determine the thickness.

[0074] Alloy powder utilization rate = weight gain of oil pumping rod / weight consumed of alloy powder.

[0075] Surface quality inspection, visual inspection and detection of defects such as pinholes and cracks through colored penetrant flaw detection agent.

[0076] The specific test results are shown in Table 1.

[0077] Table 1 Test results of wear-resistant and anti-corrosion layer of pumping rod

[0078] (Size of the pumping rod sample: Ø28.6mm×1200mm, cladding / spray welding length 600mm)

[0079] project Laser cladding example 2 Laser cladding example 3 Laser cladding example 4 Traditional spray welding Hardness of wear-resistant and anti-corrosion layer, HV200 585、589、532 563、574、558 542、573、586 572、556、561 Thickness of wear-resistant and anti-corrosion layer on one side (before grinding), mm 0.50 0.48 0.45 0.46 Weight before cladding / spray welding, g 5933.7 5928.2 5925.5 5932.9 Weight after cladding / spray welding, g 6142.4 6130.5 6140.0 6129.7 Effective powder loading amount of oil pumping polished rod, g 208.7 202.3 214.5 196.8 Alloy powder consumption, g 240 240 267 298.9 Alloy powder utilization, % 86.96 84.29 80.34 65.84 Surface quality No pinholes, cracks or other defects No pinholes, cracks or other defects No pinholes, cracks or other defects No pinholes, cracks or other defects

[0080] It can be seen that the high-speed laser cladding wear-resistant and anti-corrosion layer production process and equipment of the oil pumping rod of the present invention have changed the current situation of the traditional spray welding oil pumping rod production process being complicated, high equipment power consumption, and low alloy powder utilization rate, thereby simplifying the process and saving costs.

[0081] Beneficial effects: The high-speed laser cladding wear-resistant and anti-corrosion layer production process and equipment for oil pumping polished rods provided by the present invention have the following beneficial effects:

[0082] 1. The laser cladding process directly melts the powder onto the surface of the pumping rod, eliminating the alloy powder pre-spraying process.

[0083] 2. Use electromagnetic induction heating device to preheat the oil pumping rod, which has concentrated energy and rapid heating. The infrared induction switch is used to control the preheating temperature, which is easy to realize automation.

[0084] 3. Laser cladding has concentrated energy, and only a small amount of energy input is needed to form a micro-molten pool on the surface of the pumping rod matrix, which can achieve high-speed processing. However, traditional spray welding remelting requires the pumping rod to be heated to about 1100°C as a whole to make the surface alloy powder molten, and the processing efficiency is low.

[0085] 4. The thickness of the cladding layer can be controlled by adjusting the laser power, spot size, powder feeding amount and other parameters. The alloy powder utilization rate is high and the thickness of the cladding layer is uniform. The thickness of the alloy layer of the traditional spray welding oil pumping polished rod can only be controlled by the thickness of the pre-sprayed alloy powder in the front process, which is greatly affected by human factors, has large errors and low utilization of alloy powder.

[0086] It can be seen that the present invention has substantial characteristics and progress compared with the prior art.

[0087] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-speed laser cladding wear-resistant and anti-corrosion layer production process for a pumping rod, characterized in that: The steps include: 1) Sand grinding: Grind the part of the oil pumping polished rod to be clad on the sand grinder to make the outer circle reach the preset diameter, remove surface impurities and reduce surface roughness; 2) Clamping: Clamp the sanded pumping rod to the rod-bearing device; 3) Laser cladding - using a high-energy laser beam to clad the surface of the preheated pumping rod with an anti-corrosion and wear-resistant alloy layer; The specific process of clamping 2) is as follows: a) The rod head at the non-upsetting end of the pumping polished rod is connected to the spindle box of the polished rod bearing equipment through a fixed fixture, and the rod head at the upsetting end of the pumping polished rod is connected to the tailstock of the polished rod bearing equipment through a movable fixture. The tailstock is controlled by a hydraulic cylinder to straighten the polished rod; b) A support platform is installed on the polished rod bearing equipment, and a pulley is installed on the support platform. During the processing, the pulley supports the oil pumping polished rod to ensure the stability of the polished rod's rotational movement; The specific process of laser cladding is as follows: a) The electromagnetic induction heating device, powder feeder and laser are installed on the sliding platform of the laser cladding equipment, and the three move synchronously; the laser cladding equipment and the light rod bearing equipment are placed in parallel and linked through the operating table; b) Processing program preparation: According to the parameters such as the outer diameter of the oil pumping polished rod, the length of the oil pumping polished rod, and the size of the light spot, the chuck speed is set to 15-30 r / min, and a spiral line processing program with a pitch of 1.5-3mm is prepared; c) Drying of alloy powder: Place the alloy powder in a clean metal tray with a powder accumulation thickness of no more than 5 mm; place the metal tray in an electric heating box and dry it at 180-200°C for 10-15 minutes; after taking it out, immediately place it in the powder feeder; d) Preheating: Start the polished rod bearing equipment and laser cladding equipment, set the current to 20-40A, and use the electromagnetic induction heating device to preheat the pumping rod to 180-220℃; e) Laser cladding: Set the laser output power to 3-4kW, start the powder feeder, and perform alloy powder cladding according to the predetermined procedure.

2. The high-speed laser cladding wear-resistant and anti-corrosion layer production process for a pumping rod according to claim 1 is characterized in that: The specific process of 1) sand grinding is: put the pumping polished rod into the sand grinder, set the sand plate speed to 800-3000r / min, the polished rod body speed to 100-400r / min, the polished rod travel speed to 0.5-2m / min, and sand grind the part of the polished rod to be clad.

3. A production equipment for the high-speed laser cladding wear-resistant and anti-corrosion layer production process of the oil pumping polished rod according to claim 1, characterized in that: The invention comprises a polished rod bearing device (1), a laser cladding device (2) and an operating table (15); a supporting platform (3) is slidably mounted on the polished rod bearing device (1); a spindle box (14) is arranged on the top of one end of the polished rod bearing device (1); a tailstock (13) is installed on the top of the other end of the polished rod bearing device (1); a fixing fixture (5) is connected to the output shaft of the spindle box (14); the fixing fixture (5) fixes the oil pumping polished rod (7) and drives the oil pumping polished rod (7) to rotate; a hydraulic cylinder (12) is installed on the tailstock (13); a hydraulic cylinder (12) is installed in the middle of the tailstock (13); A movable tooling (6) is installed, a hydraulic cylinder (12) controls the movement of a tailstock (13), the movable tooling (6) is connected to the other end of an oil pumping rod (7), two pulleys (8) are symmetrically installed on the support platform (3), a sliding platform (4) is slidably installed on the laser cladding equipment (2), a laser (9) is installed on the sliding platform (4), a powder feeder (10) is installed on one side of the laser (9), and an electromagnetic induction heating device (11) sleeved on the oil pumping rod (7) is installed on one side of the powder feeder (10), and the operating table (15) is used to compile a processing program.

4. The production equipment for the high-speed laser cladding wear-resistant and anti-corrosion layer production process for oil pumping polished rods according to claim 3 is characterized in that: The oil pumping polished rod (7) comprises an oil pumping polished rod body (7.1) in the middle, a non-upsetting end rod head (7.2) arranged at one end of the oil pumping polished rod body (7.1), and an upsetting end rod head (7.3) arranged at the other end of the oil pumping polished rod body (7.1).

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