The present invention belongs to the field of laser cladding technology, specifically, a processing device and method for laser cladding pipelines, including a base, a support frame is arranged on the top of the base, a top plate is arranged on the front side of the support frame, a laser beam emitter is arranged at the bottom of the top plate, a storage box is arranged outside the laser beam emitter, a spray powder feeding device is arranged on the top of the storage box, a leak hole is opened at the bottom of the storage box, a preheating and cleaning mechanism is arranged at the bottom of the leak hole, and a plurality of power rollers are arranged on the top of the base; the present invention can not only preheat the cladding material through the preheating and cleaning mechanism, but also quickly clean the area that has not been clad, and remove the impurities remaining in the weld during the rotation process, thereby improving the quality of laser cladding welding.

1. A laser cladding pipeline processing equipment, comprising a base (1), characterized in that: a support frame (2) is arranged on the top of the base (1), a top plate (3) is arranged on the front side of the support frame (2), a laser beam emitter (4) is arranged at the bottom of the top plate (3), a storage box (5) is arranged outside the laser beam emitter (4), a spray powder feeding device (6) is arranged on the top of the storage box (5), a leakage hole (7) is opened at the bottom of the storage box (5), a preheating and cleaning mechanism (8) is arranged at the bottom of the leakage hole (7), and a plurality of power rollers (9) are arranged on the top of the base (1).
2. The laser cladding pipeline processing equipment according to claim 1 is characterized in that: the preheating and cleaning mechanism (8) comprises a cylinder (81), the surface of the cylinder (81) is provided with a plurality of blades (82) uniformly distributed in the circumferential direction, the number of the blades (82) is less than or equal to 3, one end of the cylinder (81) is provided with a driven gear (83), the driven gear (83) is meshed with a driving gear (84), the surface of the driving gear (84) is provided with a rotating motor (85) for driving the driving gear (84) to rotate, the end of the blade (82) is plugged with a T-shaped plate (86), the surface of the blade (82) is provided with a vent hole (87), the transverse section of the T-shaped plate (86) is completely located inside the blade (82), the vent hole (87) is covered by the transverse section of the T-shaped plate (86), the surface of the blade (82) is provided with an electric heating wire (88), and the inner walls on both sides of the leakage hole (7) are respectively provided with a positive electrode and a negative electrode of the power supply.
3. The laser cladding pipe processing equipment according to claim 2 is characterized in that: a card plate (10) is provided on the surface of the blade (82), and sliders (11) are sleeved on both ends of the electric heating wire (88), so that the electrode of the electric heating wire (88) passes through the slider (11), and a return spring (12) is connected between the slider (11) and the card plate (10), and the return spring (12) is connected to the end of the card plate (10) away from the cylinder (81), and a slave magnetic block (13) is provided on the surface of the slider (11), and a main magnetic block (14) is provided on the front side wall of the leakage hole (7). When the cylinder (81) rotates and drives the blade (82) to rotate to the closest distance to the main magnetic block (14), the main magnetic block (14) and the slave magnetic block (13) have different polarities, so as to generate an attractive force to drive the slider (11) to compress the return spring (12) and move the electric heating wire (88) at the same time.
4. The processing equipment for laser cladding pipes according to claim 3 is characterized in that: a connecting plate (15) is provided between the two sliders (11), the connecting plate (15) is vertically arranged with the adjacent blades (82), and a plurality of protrusions (16) are arranged on the surface of the connecting plate (15).
5. The processing equipment for laser cladding pipes according to claim 2 is characterized in that: the spray powder feeding device (6) is inclined, and the bottom end is inclined forward, and when the cylinder (81) drives the blades (82) to rotate, the spray powder feeding device (6) can be in a parallel state with the blades (82).
6. The processing equipment for laser cladding pipes according to claim 1 is characterized in that: a lifting plate (17) is provided on the front side of the support frame (2), one side of the lifting plate (17) is tooth-shaped, and a lifting gear is provided at the tooth. A lifting motor (18) is installed on the rear side of the support frame (2), and the output shaft of the lifting motor (18) is connected to the lifting gear. A through groove is provided in the middle of the lifting plate (17), and a plurality of guide plates fixedly connected to the support frame (2) are provided inside the through groove.
7. The processing equipment for laser cladding pipes according to claim 2 is characterized in that: two sliding cylinders (19) with openings facing each other horizontally are provided on the outer sides of the positive and negative poles of the power supply, respectively, and are connected to the sliding cylinder (19) through an adjusting spring (20), and one end of the adjusting spring (20) is fixed inside the sliding cylinder (19).
8 .A method for cladding processing using the laser cladding pipe processing equipment described in any one of claims 1 to 7, characterized in that: the method comprises the following steps: step 1: firstly, two pipes to be connected are placed on the power roller (9) on the top of the base (1), the power roller (9) supports the two pipes from the front and rear sides, and then the power roller (9) drives the two pipes to rotate simultaneously; step 2: then the rotating motor (85) drives the cylinder (81) to rotate, the cylinder (81) drives the blade (82) to rotate, and the two ends of the electric heating wire (88) are connected to the positive and negative electrodes of the power supply. When the blade (82) rotates to be parallel to the spray powder feeding device (6), At this time, the electric heating wire (88) is powered off, and the powder jetting device (6) automatically sprays out the cladding material;

Step 3: The powder subsequently sprayed is sprayed on the electric heating wire (88), and the heat on the surface of the electric heating wire (88) is transferred to the passing powder. When the blade (82) rotates to the bottom, the T-plate (86) slides along the blade (82) to the bottom, and hot air is extracted through the vent (87). The T-plate (86) slides toward the cylinder (81) again, and the hot air drawn into the blade (82) is gradually pressed out and sprayed on the gap of the pipe to be clad;

Step 4: After the pipe rotates one circle, the cladding material is completely solidified, and the laser cladding processing of the pipe is realized.

Technical field
[0001] The present invention belongs to the field of laser cladding technology, and particularly relates to a processing equipment and method for laser cladding pipelines.

Background technology
[0002] Laser cladding is the process of using high-energy laser beam irradiation to rapidly melt, expand and solidify a layer of material with special physical, chemical or mechanical properties on the surface of a substrate to form a new composite material to make up for the lack of high performance of the substrate. It can give full play to the advantages of both and overcome each other’s shortcomings. According to the working conditions of the workpiece, metals or non-metals of various (designed) components can be clad to prepare surface coatings that are heat-resistant, corrosion-resistant, wear-resistant, oxidation-resistant, fatigue-resistant or have optical, electrical and magnetic properties. Through laser cladding, a layer of high-melting-point alloy can be clad on a low-melting-point material, and the surface of non-phase change materials (Al, Cu, Ni, etc.) and non-metallic materials can also be strengthened. The actual process of laser cladding includes prefabrication method and synchronous method. The prefabrication method includes two methods: prefabrication of coating layer and prefabrication of sheet, while the synchronous method includes two methods: synchronous powder feeding method and synchronous wire feeding method. Each method has its own advantages and disadvantages. In actual use, the corresponding selection is made according to the needs.
[0003] When the existing laser cladding equipment is performing laser cladding, the heat generated by the laser can only be gradually transferred from the surface of the cladding material to the inside of the cladding material until it is transferred to the cladding material in contact with the workpiece. There is a time difference for the temperature of the cladding material to gradually increase to the melting temperature, causing the surface cladding material to melt faster, while the internal cladding material melts slower. When the preheating mechanism is set for preheating, the cladding material is sprayed out by the spray powder feeding device. When spraying, it is easy to cause the temperature of the preheated cladding material to decrease, and the preheating effect becomes worse.
[0004] Therefore, it is necessary to invent a processing equipment and processing method for laser cladding pipelines to solve the above problems.

Invention content
[0005] In view of the above problems, the present invention provides a laser cladding pipe processing equipment and processing method to solve the problems raised in the above background technology.
[0006] To achieve the above purpose, the present invention provides the following technical solutions: a laser cladding pipe processing equipment, including a base, a support frame is arranged on the top of the base, a top plate is arranged on the front side of the support frame, a laser beam emitter is arranged at the bottom of the top plate, a storage box is arranged outside the laser beam emitter, a spray powder feeding device is arranged on the top of the storage box, a leak hole is opened at the bottom of the storage box, a preheating and cleaning mechanism is arranged at the bottom of the leak hole, and a plurality of power rollers are arranged on the top of the base.
[0007] Preferably, the preheating and clearing mechanism includes a cylinder, a plurality of circumferentially evenly distributed blades are arranged on the surface of the cylinder, the number of the blades is less than or equal to 3, a driven gear is arranged at one end of the cylinder, a driving gear is meshed at the driven gear, a rotating motor for driving the driving gear to rotate is arranged on the surface of the driving gear, a T-shaped plate is inserted at the end of the blade, a vent is opened on the surface of the blade, the transverse section of the T-shaped plate is completely located inside the blade, the vent is covered by the transverse section of the T-shaped plate, an electric heating wire is arranged on the surface of the blade, and the positive and negative electrodes of the power supply are respectively arranged on the inner walls on both sides of the leakage hole.
[0008] Preferably, a card plate is provided on the surface of the blade, and sliders are sleeved at both ends of the electric heating wire so that the electrode of the electric heating wire passes through the slider, and a return spring is connected between the slider and the card plate, and the return spring is connected to the end of the card plate away from the cylinder. A slave magnetic block is provided on the surface of the slider, and a main magnetic block is provided on the front side wall of the leakage hole. When the cylinder rotates and drives the blade to rotate to the closest distance to the main magnetic block, the main magnetic block and the slave magnetic block have different polarities, so as to generate an attractive force to drive the slider to compress the return spring and move the electric heating wire at the same time.
[0009] Preferably, a connecting plate is provided between the two sliders, and the connecting plate is vertically arranged with adjacent blades, and a plurality of protrusions are provided on the surface of the connecting plate.
[0010] Preferably, the jet powder feeding device is arranged obliquely, and the bottom end is inclined forward. When the cylinder drives the blade to rotate, the jet powder feeding device can be in a parallel state with the blade.
[0011] Preferably, a lifting plate is provided on the front side of the support frame, one side of the lifting plate is tooth-shaped, and a lifting gear is provided at the tooth. A lifting motor is installed on the rear side of the support frame, and the output shaft of the lifting motor is connected to the lifting gear. A through groove is provided in the middle of the lifting plate, and a plurality of guide plates fixedly connected to the support frame are provided inside the through groove.
[0012] Preferably, two sliding cylinders with openings facing each other horizontally are provided on the outer sides of the positive and negative electrodes of the power supply, respectively, and are connected to the sliding cylinder through an adjusting spring, and one end of the adjusting spring is fixed inside the sliding cylinder.
[0013] The present invention also provides a method for performing cladding processing using the laser cladding pipeline processing equipment described in any one of the above items, the method comprising the following steps,
[0014] Step 1: First, place two pipelines to be connected on the power roller on the top of the base, the power roller supports the two pipelines from the front and rear sides, and then the power roller drives the two pipelines to rotate simultaneously;
[0015] Step 2: Then, the rotating motor drives the cylinder to rotate, the cylinder drives the blades to rotate, and the two ends of the electric heating wire are connected to the positive and negative electrodes of the power supply. When the blades rotate to be parallel to the spray powder feeding device, the electric heating wire is powered off, and the spray powder feeding device automatically sprays the cladding material;
[0016] Step 3: The powder sprayed out is sprayed on the electric heating wire, and the heat on the surface of the electric heating wire is transferred to the passing powder. When the blade rotates to the bottom, the T-plate slides along the blade to the bottom, extracts hot air through the vent, and the T-plate slides back to the cylinder, gradually presses out the hot air drawn into the blade and sprays it on the gap of the pipe to be clad;
[0017] Step 4: After the pipe rotates one circle, the cladding material is completely solidified, and the laser cladding processing of the pipe is realized.
[0018] Technical effects and advantages of the present invention:
[0019] 1. The present invention can not only preheat the cladding material through the preheating and clearing mechanism, but also quickly clear the area that has not been clad, and remove the impurities remaining in the weld during the rotation process, thereby improving the quality of laser cladding welding;
[0020] 2. The present invention can attract the secondary magnetic block on the surface of the slider through the main magnetic block, so that the slider moves through the attraction of the two, compresses the return spring, and moves the electric heating wire at the same time. When the return spring returns, it drives the electric heating wire to move quickly, and the relative displacement speed between the electric heating wire and the powder material becomes faster, thereby reducing the adhesion of the powder material, and when the electric heating wire returns to its original position, it will shake, so that the powder material on the surface of the electric heating wire will fall off, reducing the probability of powder material adhesion;
[0021] 3. The present invention can block the powder that rebounds after passing through the electric heating wire through the connecting plate. At the same time, the protrusions on its surface can block the powder that rebounds along the surface of the connecting plate. Then the connecting plate guides the blocked powder to the vicinity of the blades. Finally, the powder is gathered through the gap between the connecting plate and the blades and sprayed onto the surface of the pipeline, so that the powder is more concentrated and the rebound of the powder by the electric heating wire is avoided, causing the powder to be dispersed.

Description of the drawings
[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings required for use in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0023] Figure 1 is a three-dimensional schematic diagram of the processing equipment for laser cladding pipes of the present invention;
[0024] Figure 2 is a side sectional view of the storage box in the present invention;
[0025] Figure 3 is an enlarged view of the A part of Figure 2 in the present invention;
[0026] Figure 4 is a main sectional view of the sliding cylinder in the present invention;
[0027] Figure 5 is a flow chart of the processing method of the present invention.
[0028] In the figure: base 1, support frame 2, top plate 3, laser beam emitter 4, storage box 5, jet powder feeding device 6, leak hole 7, preheating cleaning mechanism 8, cylinder 81, blade 82, driven gear 83, driving gear 84, rotating motor 85, T-plate 86, vent 87, electric heating wire 88, power roller 9, card plate 10, slider 11, return spring 12, slave magnetic block 13, main magnetic block 14, connecting plate 15, protrusion 16, lifting plate 17, lifting motor 18, sliding cylinder 19, adjusting spring 20. Specific implementation method
[0029] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described in combination with the drawings in the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention;
[0030] In the description of the present invention, it should be understood that the terms “length”, “width”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside” and the like indicate the orientation or position relationship 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 operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, in the description of the present invention, “multiple” means two or more, unless otherwise clearly and specifically defined.
[0031] The present invention provides a laser cladding pipeline processing equipment as shown in Figure 1-4, including a base 1, a support frame 2 is arranged on the top of the base 1, a top plate 3 is arranged on the front side of the support frame 2, and a laser beam emitter 4 is arranged at the bottom of the top plate 3. The laser beam emitter 4 is a device for emitting laser beams that is necessary for laser cladding equipment in the prior art. A storage box 5 is arranged outside the laser beam emitter 4, and a spray powder feeding device 6 is arranged on the top of the storage box 5. The spray powder feeding device 6 is a necessary structure for laser cladding equipment in the prior art that adopts a synchronous powder feeding method. It will not be repeated here. A leak hole 7 is opened at the bottom of the storage box 5, and a preheating and cleaning mechanism 8 is arranged at the bottom of the leak hole 7. A plurality of power rollers 9 are arranged on the top of the base 1. The power rollers 9 have their own power and are roller devices commonly seen on the market that support pipelines and drive the pipelines to rotate along their central axis.
[0032] When performing laser cladding processing, the two pipes to be connected can be first placed on the power roller 9 on the top of the base 1. The power roller 9 supports the two pipes from the front and rear sides. Then the power roller 9 drives the two pipes to rotate at the same time. During the rotation process, the spray powder feeding device 6 automatically sprays the cladding material. When the cladding material passes through the preheating and cleaning mechanism 8, the preheating and cleaning mechanism 8 can preheat the cladding material. Finally, when the cladding material reaches the surface of the pipe, the heat generated by the laser beam emitted by the laser beam emitter 4 melts the cladding material until the pipe rotates one circle and the cladding material is completely solidified, realizing the laser cladding processing of the pipe. The preheating and cleaning mechanism 8 can not only preheat the cladding material, but also quickly clean the area that has not been clad, and remove the impurities remaining in the weld during the rotation process, thereby improving the quality of laser cladding welding.
[0033] Referring to Figures 2-3 of the specification, the preheating and cleaning mechanism 8 includes a cylinder 81, and a plurality of circumferentially evenly distributed blades 82 are arranged on the surface of the cylinder 81, and the number of blades 82 is less than or equal to 3. The jet powder feeding device 6 is arranged obliquely, and the bottom end is inclined forward. When the cylinder 81 drives the blade 82 to rotate, the jet powder feeding device 6 can be in a parallel state with the blade 82. One end of the cylinder 81 is provided with a driven gear 83, and a driving gear 84 is meshed at the driven gear 83. The surface of the driving gear 84 is provided with a rotating motor 85 for driving it to rotate. The end of the blade 82 is plugged with a T-shaped plate 86, and a vent hole 87 is opened on the surface of the blade 82. The transverse section of the T-shaped plate 86 is completely located inside the blade 82, and the vent hole 87 is covered by the transverse section of the T-shaped plate 86. The surface of the blade 82 is provided with an electric heating wire 88, and the inner walls on both sides of the leakage hole 7 are respectively provided with the positive and negative electrodes of the power supply.
[0034] During the cladding process, the specific work of the preheating and cleaning mechanism 8 is as follows: the rotating motor 85 drives the cylinder 81 to rotate, and the cylinder 81 drives the blade 82 to rotate. During the rotation process, before the blade 82 rotates to be parallel to the spray powder feeding device 6, the two ends of the electric heating wire 88 are respectively its positive and negative poles, which are just connected with the positive and negative poles of the power supply, so that the electric heating wire 88 is energized and heated. When the blade 82 rotates to be parallel to the spray powder feeding device 6, the electric heating wire 88 is powered off at this time, and the powder sprayed by the spray powder feeding device 6 is just sprayed on the electric heating wire 88, so that the heat on the surface of the electric heating wire 88 is transferred to the passing powder, and the preheating of the powder is realized. Since the electric heating wire 88 is set on the path where the powder passes, it is closer to the pipeline, thereby avoiding the heat loss on the powder. At the same time, since multiple electric heating wires 88 are powered on and off in turn, the heat on the surface of the electric heating wire 88 can be completely transferred to the powder. And it is not easy for the powder to adhere to the surface of the continuously heated electric heating wire 88. At the same time, the powder sprayed later can impact the powder sprayed previously, further reducing the probability of the powder adhering to the surface of the electric heating wire 88. Finally, when the blade 82 rotates to the bottom, the T-plate 86 slides along the blade 82 to the bottom. During the sliding process, the hot air on the surface of the pipeline that has been driven by the power roller 9 and has been clad can be extracted through the vent 87, so that it can cool and solidify faster. After the hot air extracted from the inside of the blade 82 rotates to the top, the T-plate 86 slides back to the cylinder 81, and the hot air drawn into the blade 82 is gradually pressed out and sprayed on the gap of the pipeline to be clad. Impurities in the gap of the pipeline can be removed without cleaning. At the same time, the sprayed hot air can preheat the pipeline. The preheated pipeline can avoid absorbing the heat in the cladding material, thereby accelerating the heating efficiency of the cladding material.
[0035] Referring to Figures 2-3 of the specification, a card plate 10 is provided on the surface of the blade 82, and sliders 11 are sleeved at both ends of the electric heating wire 88, so that the electrode of the electric heating wire 88 passes through the slider 11, and a return spring 12 is connected between the slider 11 and the card plate 10, and the return spring 12 is connected to the end of the card plate 10 away from the cylinder 81. A secondary magnetic block 13 is provided on the surface of the slider 11, and a main magnetic block 14 is provided on the front side wall of the leakage hole 7. When the cylinder 81 rotates and drives the blade 82 to rotate to the closest distance to the main magnetic block 14, the main magnetic block 14 and the secondary magnetic block 13 have different polarities, so as to generate an attractive force to drive the slider 11 to compress the return spring 12 and move the electric heating wire 88 at the same time.
[0036] When the blade 82 is in a horizontal state driven by the cylinder 81, the main magnetic block 14 can attract the slave magnetic block 13 on the surface of the slider 11, so that the slider 11 moves through the attraction of the two, compressing the return spring 12 and moving the electric heating wire 88 at the same time. When the cylinder 81 continues to rotate, before the blade 82 is parallel to the jet powder feeding device 6, the main magnetic block 14 separates from the slave magnetic block 13 until the blade 82 is parallel to the jet powder feeding device 6. When the return spring 12 pushes the slider 11 and the electric heating wire 88 to return, the electric heating wire 88 is energized. Then the power is turned off until the electric heating wire 88 returns to its original position. The sprayed powder will contact the electric heating wire 88. The moving electric heating wire 88 will fully contact the sprayed powder during the movement. When the initial temperature of the electric heating wire 88 is the highest, the electric heating wire 88 is driven by the return spring 12 to move quickly, and the relative displacement speed between the electric heating wire 88 and the powder becomes faster, thereby reducing the adhesion of the powder. When the electric heating wire 88 returns to its original position, it will shake, so that the powder on the surface of the electric heating wire 88 will fall off, reducing the probability of powder adhesion.
[0037] Referring to Figures 2-3 of the specification, a connecting plate 15 is provided between the two sliders 11. The connecting plate 15 is vertically arranged with the adjacent blades 82, and a plurality of protrusions 16 are arranged on the surface of the connecting plate 15.
[0038] The connecting plate 15 can block the powder that rebounds from the electric heating wire 88, and the protrusions 16 on its surface can block the powder that rebounds along the surface of the connecting plate 15. Then the connecting plate 15 guides the blocked powder to the blade 82, and finally the powder is gathered through the gap between the connecting plate 15 and the blade 82, and sprayed onto the surface of the pipeline, so that the powder is more concentrated, and the electric heating wire 88 is prevented from rebounding the powder, causing the powder to disperse.
[0039] Referring to Figures 2-3 of the specification, the front side of the support frame 2 is provided with a lifting plate 17, one side of the lifting plate 17 is tooth-shaped, and a lifting gear is provided at the tooth. A lifting motor 18 is installed on the rear side of the support frame 2, and the output shaft of the lifting motor 18 is connected to the lifting gear. A through groove is opened in the middle of the lifting plate 17, and a plurality of guide plates fixedly connected to the support frame 2 are provided inside the through groove.
[0040] When targeting pipes of different diameters, the regulating motor can be started, and the regulating motor drives the lifting gear to rotate. The lifting gear drives the lifting plate 17 to move in the vertical direction by meshing with the teeth on the surface of the lifting plate 17, so that the lifting plate 17 drives the top plate 3 to rise or fall, thereby adjusting the height of the laser beam emitter 4.
[0041] Referring to Figure 4 of the specification, two sliding cylinders 19 with openings facing each other horizontally are respectively arranged on the outer sides of the positive and negative electrodes of the power supply, and are connected to the sliding cylinder 19 through an adjusting spring 20, and one end of the adjusting spring 20 is fixed inside the sliding cylinder 19.
[0042] When the electrodes at both ends of the electric heating wire 88 contact the positive and negative electrodes of the power supply, the positive and negative electrodes of the power supply are squeezed to move the positive and negative electrodes of the power supply to the inside of the sliding cylinder 19, and the adjusting spring 20 is compressed. The adjusting spring 20 can push the positive and negative electrodes of the power supply to squeeze at both ends of the electric heating wire 88, and can also make it energized and conductive when it is worn out after long-term use.
[0043] Referring to Figure 5 of the specification, the present invention also provides a method for cladding processing using any of the above-mentioned laser cladding pipeline processing equipment, the method comprising the following steps,
[0044] Step 1: First, place the two pipelines to be connected on the power roller 9 on the top of the base 1, the power roller 9 supports the two pipelines from the front and rear sides, and then the power roller 9 drives the two pipelines to rotate simultaneously;
[0045] Step 2: Then the rotating motor 85 drives the cylinder 81 to rotate, the cylinder 81 drives the blade 82 to rotate, and the two ends of the electric heating wire 88 are correspondingly connected to the positive and negative electrodes of the power supply. When the blade 82 rotates to be parallel to the spray powder feeding device 6, the electric heating wire 88 is powered off, and the spray powder feeding device 6 automatically sprays out the cladding material;
[0046] Step 3: The powder sprayed out subsequently is sprayed on the electric heating wire 88, and the heat on the surface of the electric heating wire 88 is transferred to the passing powder. When the blade 82 rotates to the bottom, the T-plate 86 slides along the blade 82 to the bottom, extracts hot air through the vent hole 87, and the T-plate 86 slides toward the cylinder 81 again, gradually presses out the hot air drawn into the blade 82 and sprays it on the gap of the pipe to be clad;
[0047] Step 4: After the pipe rotates for one circle, the cladding material is completely solidified, and the laser cladding processing of the pipe is realized.
[0048] Although the present invention is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that it is still possible to modify the technical solutions recorded in the above embodiments, or to replace some of the technical features therein by equivalent; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.