Intelligent preheating and heat preservation surfacing welding device for descaling roller products

Abstract

The utility model relates to an intelligent preheating heat preservation surfacing welding device for descaling roller products, which comprises a processing platform, an intelligent temperature control device, a movable hot processing device, a temperature display and a thermocouple control circuit, the processing platform is provided with the intelligent temperature control device, and the top of the intelligent temperature control device is provided with a heat insulation device. The heat insulation device is provided with a heat insulation door curtain which slides in a heat insulation guide rail under the condition that a heat insulation motor drives a heat insulation driving shaft to rotate, a welding gun of the movable hot working device stretches into a heat insulation door curtain machining opening to machine workpieces, and the heat insulation door curtain synchronously and transversely moves along with machining of the welding gun. The device has the beneficial effects that accurate pre-welding preheating, interlayer heat preservation during welding and post-welding heat preservation can be realized aiming at the metallurgical roller, the temperature gradient can be effectively reduced, the generation of welding cracks can be avoided, the generation of welding waste products can be effectively avoided through the real-time monitoring of the appearance during welding, the surfacing quality is effectively improved, the surfacing cost is reduced, and the economic benefit is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of preheating, heat preservation and surfacing welding of dephosphorization rollers, and in particular to an intelligent preheating, heat preservation and surfacing welding device for descaling roller products. Background Art

[0002] Descaling rollers are subjected to high-pressure water erosion and dynamic impact caused by high-temperature billet descaling process for a long time. Under the high temperature, strong wear, multi-cycle heat, force, flow and multi-field coupling, wear and corrosion failure often occur, affecting the continuous production of steel rolling. Plasma cladding and laser cladding are new surface repair and strengthening technologies with many advantages such as high cladding efficiency, high degree of automation, high powder utilization rate and low dilution rate. They are widely used in surface repair and strengthening of various parts.

[0003] In the process of using plasma cladding and laser cladding to repair and strengthen the surface of descaling rollers and other roller products that serve under harsh working conditions, nickel-based alloy powders containing WC hard phases are usually selected. However, in the multi-pass and multi-layer cladding process, the cladding alloy powder containing WC hard phases is extremely sensitive to temperature due to differences in thermal conductivity, thermal expansion coefficient and solidification sequence. Uneven temperature changes and large temperature gradients will cause large thermal stress and uneven residual stress distribution of the roller. Microcracks are very likely to appear after cladding. Microcracks will be repeatedly impacted during the service of the coating, causing them to germinate and expand into large cracks, ultimately leading to coating failure.

[0004] The Chinese invention patent with patent publication number CN117983923A discloses "an induction preheating-assisted aluminum-steel heterogeneous material laser brazing method and device". After the workpiece to be welded is pretreated, an induction heating coil is first used as a preheating heat source to reduce the temperature gradient change in the area around the weld during the welding process, and then the welding process parameters are set to overlap the workpiece. However, there are limitations for preheating large roller-like components.

[0005] The Chinese invention patent with patent publication number CN117733272A discloses "a modular welding furnace with a multi-module design". Although the invention realizes the preheating, heating and cooling operations of the workpiece in sequence under a vacuum environment to efficiently complete the welding of the workpiece, its structure is relatively complex and the cost is relatively high. Summary of the invention

[0006] In order to overcome the shortcomings of the prior art, the utility model provides an intelligent preheating and heat-insulating surfacing device for descaling roller products. Through the intelligent temperature control device and the movable heat processing device, it can realize accurate preheating before welding, interlayer insulation during welding, and post-welding insulation for metallurgical rollers, which can effectively reduce the temperature gradient and avoid the formation of welding cracks. Real-time monitoring of the morphology during welding can effectively avoid the generation of welding waste, effectively improve the quality of surfacing, reduce the cost of surfacing, and improve economic benefits.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] An intelligent preheating and heat preservation surfacing device for descaling roller products comprises a processing platform, an intelligent temperature control device, a movable heat processing device, a temperature display, and a thermocouple control circuit. The intelligent temperature control device is arranged at the workpiece processing position of the processing platform, and a heat insulation device is arranged on the top of the intelligent temperature control device. The heat insulation device is provided with an heat insulation door curtain at the horizontal opening position at the top of the intelligent temperature control device, and heat insulation guide rails are arranged on both sides of the horizontal opening. The heat insulation door curtain slides in the heat insulation guide rail when the heat insulation drive shaft is driven by the heat insulation motor. A movable heat processing device is arranged on one side of the intelligent temperature control device, and the welding gun of the movable heat processing device is extended into the processing opening of the heat insulation door curtain to process the workpiece. The heat insulation door curtain moves horizontally synchronously with the welding gun processing. A thermocouple is connected in the intelligent temperature control device, and the thermocouple is connected to the temperature display through the thermocouple control circuit.

[0009] Furthermore, the intelligent temperature control device is composed of an upper cover and a lower cover to form a cavity structure, and resistance wires, heat-resistant bricks and thermal insulation asbestos are arranged inside the cavity structure.

[0010] Furthermore, inner water pipes are arranged inside the shells of the upper cover and the lower cover.

[0011] Furthermore, the inner water pipe is connected to a water cooling system.

[0012] Furthermore, the movable heat processing device is connected to an electric control box.

[0013] Furthermore, the movable hot processing device includes a hot processing robot arm, a track base, a slide rail, a rack, a welding gun, and a welding morphology monitoring device; the slide rail and the rack are arranged on the track base, the hot processing robot arm is slidably connected to the slide rail, a gear is arranged at the bottom of the hot processing robot arm, and the hot processing robot arm slides on the slide rail through the gear and the rack; the welding gun is arranged at the end of the hot processing robot arm, and a welding morphology monitoring device is arranged next to the welding gun.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. Asbestos insulation plugging and asbestos baffles are arranged at both ends of the intelligent temperature control device, and a movable open insulation device is arranged at the upper end, which works together with the internal insulation asbestos and resistance wire to maximize the uniform heating of the workpiece and reduce the temperature loss of the workpiece. The internal temperature of the device is measured in real time by thermocouples, and the actual temperature is compared with the set temperature. The output power of the resistance wire is timely feedback-adjusted to stabilize the actual temperature at the set temperature, thereby achieving accurate preheating of the roller before welding, interlayer insulation during welding and insulation after welding, and improving welding quality.

[0016] 2. The welding gun of the movable hot processing device extends into the cavity of the intelligent temperature control device through the heat-insulating door curtain to process the workpiece. The heat-insulating door curtain slides in the heat-insulating guide rail as the hot processing robot arm moves, so as to keep the unprocessed area of ​​the workpiece warm in the intelligent temperature control device to the maximum extent, minimize the temperature loss of the workpiece, improve the processing quality of the workpiece, and ensure the surface quality of the workpiece.

[0017] 3. A welding morphology monitoring device is provided at the end of the processing arm, which can monitor the welding area of ​​the welding gun or cladding head in real time, and facilitate the positioning of the welding gun or cladding head; it can extract information such as the shape, size and temperature of the molten pool, and realize quantitative detection and analysis of the molten pool; the device can also monitor and analyze the post-welding morphology, and immediately alarm and handle welding microscopic defects, so that the operator can adjust the welding parameters in time, effectively reduce the scrap rate, improve welding production efficiency, effectively improve the quality of cladding, reduce cladding costs, and improve economic benefits.

[0018] 4. The combination of temperature control and welding morphology detection is particularly suitable for plasma surfacing of descaling rollers and Ni-based WC alloy powder plasma surfacing. Through the mobile open insulation device, combined with the temperature self-feedback function, precise temperature control of the welding roller can be achieved, which can effectively reduce the temperature gradient and avoid the formation of welding cracks. The welding morphology monitoring device can realize instantaneous detection of the molten pool and analysis of the post-welding morphology, and synchronous early warning, effectively avoiding the generation of welding waste, solving the industry bottleneck and effectively filling the industry gap. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural schematic diagram of an intelligent preheating and heat preservation surfacing device for descaling roller products described in the utility model;

[0020] Figure 2 It is a schematic diagram of the processing platform described in the utility model;

[0021] Figure 3 This is the front view of the processing platform described in the utility model;

[0022] Figure 4 It is a schematic diagram of the intelligent temperature control device described in the utility model;

[0023] Figure 5 It is a schematic diagram of the lower cover of the intelligent temperature control device described in the utility model;

[0024] Figure 6 This is a schematic diagram of the upper cover of the intelligent temperature control device described in the utility model;

[0025] Figure 7 This is the assembly diagram of the heat-resistant bricks, thermal insulation asbestos and resistance wire described in the utility model;

[0026] Figure 8 It is a cross-sectional view of the upper cover of the intelligent temperature control device described in the utility model;

[0027] Fig. 9 It is an axonometric view of the back structure of the utility model;

[0028] Fig.10 It is a schematic diagram of the movable thermal processing device described in the utility model;

[0029] Fig.11 The welding gun described in the utility model is a partial enlarged view;

[0030] Fig.12 This is the PLC ladder diagram of the surfacing welding system described in the utility model.

[0031] In the figure: 1-processing platform, 101-processing platform motor, 102-gear transmission, 103-support chuck, 104-support rear head, 105-rear head base, 106-mobile end seat, 2-intelligent temperature control device, 201-thermal insulation device, 202-thermal insulation motor, 203-thermal insulation drive shaft, 204-thermal insulation guide rail, 205-thermal insulation curtain, 206-upper cover, 207-lower cover, 208-thermocouple, 209-resistance wire, 210-heat-resistant brick, 211-insulating asbestos, 212-asbestos insulation plugging, 213-asbestos baffle , 214-water inlet, 215-water outlet, 3-water cooling system, 301-water tank, 302-water inlet pipe, 303-water outlet pipe, 304-inner water pipe, 4-movable hot processing device, 401-movable hot processing robot arm, 402-robot arm ground rail, 403-slide rail, 404-big arm adjustment motor, 405-small arm adjustment motor, 406-slide rail motor, 407-rack, 408-welding gun, 409-welding morphology monitoring device, 5-electric control box, 6-powder feeder, 7-processing workpiece, 8-temperature display, 9-thermocouple control circuit. DETAILED DESCRIPTION

[0032] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings:

[0033] like Figure 1-Figure 12As shown, the working principle of an intelligent preheating and heat preservation surfacing device for descaling roller products is as follows: an intelligent temperature control device 2 is set on a processing platform 1, and a workpiece 7 is set in an internal cavity structure of the intelligent temperature control device 2. The resistance wire 209 and the heat-insulating asbestos 211 in the intelligent temperature control device 2 are used to preheat and weld the workpiece 7. The temperature inside the device is measured in real time by a thermocouple 208 to stabilize the actual temperature at the set temperature. The welding gun 408 of the movable hot processing device 4 extends from the heat-insulating door curtain into the intelligent temperature control device 2 to process the workpiece 7. The heat-insulating door curtain 205 gradually slides open as the welding gun 408 moves for processing, thereby minimizing the temperature loss of the workpiece, improving the processing quality of the workpiece, and ensuring the surface quality of the workpiece.

[0034] like Figure 1-Figure 12 As shown, an intelligent preheating and heat preservation surfacing device for descaling roller products includes a processing platform 1, an intelligent temperature control device 2, a movable hot processing device 4, a temperature display 8, and a thermocouple control circuit 9. The processing position of the workpiece 1 of the processing platform is provided with an intelligent temperature control device 2, and a heat insulation device 201 is provided on the top of the intelligent temperature control device 2. The heat insulation device 201 is provided with an insulation door curtain 205 at a horizontal opening position on the top of the intelligent temperature control device 2, and insulation guide rails 204 are provided on both sides of the horizontal opening. The insulation door curtain 205 slides in the insulation guide rail 204 when the insulation motor 202 drives the insulation drive shaft 203 to rotate. The movable hot processing device 4 is provided on one side of the intelligent temperature control device 2. The welding gun 408 of the mobile hot processing device 4 extends into the processing port of the heat insulation door curtain 205 to process the workpiece. The heat insulation door curtain 205 moves laterally synchronously with the processing of the welding gun 408. The thermocouple 208 is connected to the intelligent temperature control device 2. The thermocouple 208 is connected to the temperature display 8 through the thermocouple control circuit 9. The heat insulation device 201 is fixedly connected to the top opening position of the upper cover of the intelligent temperature control device 2. The intelligent temperature control device 2 is used to accurately preheat the workpiece 7. When the predetermined temperature is reached, the heat insulation motor 202 will be triggered to drive the heat insulation drive shaft 203 to rotate, so that the heat insulation door curtain 205 moves along the heat insulation guide rail 204. The heat insulation door curtain 204 moves laterally synchronously with the welding gun 408 to minimize heat loss.

[0035] like Figure 2-Figure 3As shown, the processing platform 1 is fixed to the ground, the support chuck 103 before processing is fixed to the processing platform 1, the processing platform motor 101 and the gear box 102 cooperate with each other to provide rotational power for the support chuck 103, and the support rear head 104 is connected to the tail of the processing platform 1 through the rear head base 105 and the movable end seat 106, which plays the role of tightening the processing workpiece 7; the distance between the workpiece support rear head 104 and the support chuck 103 is adjusted by the movable end seat 106 to adapt to the size of different processing workpieces 7. The processing workpiece 7 is axially fixed to the processing platform 1 through the support chuck 103 and the support rear head 104.

[0036] like Figure 4-Figure 8 As shown, the intelligent temperature control device 2 is hinged by an upper cover 206 and a lower cover 207 to form a cavity structure, and a resistance wire 209, a heat-resistant brick 210 and an insulating asbestos 211 are arranged inside the cavity structure. The intelligent temperature control device 2 performs accurate preheating before welding, interlayer insulation during welding and post-welding insulation on the processed workpiece 7. The lower cover 207 is connected to the processing platform 1 by bolts, and the upper cover 206 is hinged to the lower cover 207 by hinges to realize the opening and closing of the upper and lower covers, so that the processed workpiece 7 can be placed and the processing workpiece 7 can be heated in an embracing manner at the same time; the resistance wire 209, the refractory brick 210 and the insulating asbestos 211 are evenly arranged inside the upper and lower covers, which can effectively make the processed workpiece 7 heated evenly and keep warm; asbestos insulation plugs 212 and asbestos baffles 213 are arranged at both ends of the intelligent temperature control device 2, and the temperature is prevented from being lost from both ends under their joint action; a thermocouple 208 is connected inside the intelligent temperature control device 2 to measure the internal temperature of the device in real time and display it on the temperature display 8.

[0037] like Figure 8-Figure 9 As shown, further, the water cooling system 3 includes a water inlet pipe 302, an inner water pipe 304, a water outlet pipe 303 and a water tank 301, the water tank 301 is provided with a water inlet pipe 302 and a water outlet pipe 303, the water inlet pipe 302 is connected to the water inlet 214 on the housing of the intelligent temperature control device, the water outlet pipe 303 is connected to the water outlet 215 on the housing of the intelligent control device, the upper cover 206 and the lower cover 207 are both provided with a water inlet 214 and a water outlet 215, The inner water pipes 304 are evenly distributed inside the upper cover 206 and the lower cover 207 shells. The water pump draws water from the water tank 301, and transports the water to the inner water pipes 304 of the upper cover 206 and the lower cover 207 of the intelligent temperature control device 2 through the water inlet pipe 302 and the water inlet port 214, and then flows back to the water tank 301 along the water outlet pipe 303 through the water outlet 215, thereby cooling the upper cover 206 and the lower cover 207 shells of the intelligent temperature control device and realizing precise temperature control of the cooling process.

[0038] like Figure 1As shown, further, the movable hot processing device 4 is connected to the electric control box 5, and the electric control box 5 controls the movement of the movable hot processing device 4 and the adjustment of the hot processing robot arm 401 to control the welding gun 408 for processing.

[0039] like Fig.10 As shown, further, the movable hot processing device 4 includes a hot processing robot arm 401, a track base 402, a slide rail 403, a rack 407, a welding gun 408, and a welding morphology monitoring device 409; the track base 402 is provided with a slide 403 and a rack 407, the hot processing robot arm 401 is slidably connected with the slide rail 403, a gear is provided at the bottom of the hot processing robot arm 401, and the gear is meshed with the rack 407, the hot processing robot arm 401 slides on the slide rail 403, and the gear is driven by the slide rail motor 406. The hot working robot arm 401 is flexibly moved by the cooperation of the upper arm adjustment motor 404 and the lower arm adjustment motor 405. The welding gun 408 is arranged at the end of the hot working robot arm 401. The welding gun 408 is flexibly moved on the surface of the workpiece 7 in the flexible movement of the hot working robot arm 401. A welding morphology monitoring device 409 is arranged next to the welding gun 408. The welding morphology monitoring device 409 moves laterally synchronously with the welding gun to monitor the internal processing situation in real time, detect defects, and thus improve the processing efficiency.

[0040] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes according to the technical scheme and concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An intelligent preheating and heat preservation surfacing device for descaling roller products, characterized in that: It includes a processing platform, an intelligent temperature control device, a movable heat processing device, a temperature display, and a thermocouple control circuit. The intelligent temperature control device is arranged at the workpiece processing position of the processing platform. A heat insulation device is arranged on the top of the intelligent temperature control device. The heat insulation device is arranged with an heat insulation door curtain at the horizontal opening position on the top of the intelligent temperature control device. Heat insulation guide rails are arranged on both sides of the horizontal opening. The heat insulation door curtain slides in the heat insulation guide rail when the heat insulation drive shaft is driven by the heat insulation motor. A movable heat processing device is arranged on one side of the intelligent temperature control device. The welding gun of the movable heat processing device is extended into the processing opening of the heat insulation door curtain to process the workpiece. The heat insulation door curtain moves horizontally synchronously with the welding gun processing. A thermocouple is connected in the intelligent temperature control device, and the thermocouple is connected to the temperature display through a thermocouple control circuit.

2. The intelligent preheating and heat preservation surfacing device for descaling roller products according to claim 1 is characterized in that: The intelligent temperature control device comprises an upper cover and a lower cover to form a cavity structure, and resistance wires, heat-resistant bricks and heat-insulating asbestos are arranged inside the cavity structure.

3. The intelligent preheating and heat preservation surfacing device for descaling roller products according to claim 2 is characterized in that: Inner water pipes are arranged in the shells of the upper cover and the lower cover.

4. The intelligent preheating and heat preservation surfacing device for descaling roller products according to claim 3 is characterized in that: The inner water pipe is connected to a water cooling system.

5. The intelligent preheating and heat preservation surfacing device for descaling roller products according to claim 1 is characterized in that: The movable heat processing device is connected to an electric control box.

6. The intelligent preheating and heat preservation surfacing device for descaling roller products according to claim 1 is characterized in that: The movable hot processing device includes a hot processing mechanical arm, a track foundation, a slide rail, a rack, a welding gun, and a welding morphology monitoring device; the slide rail and the rack are arranged on the track foundation, the hot processing mechanical arm is slidably connected with the slide rail, a gear is arranged at the bottom of the hot processing mechanical arm, and the hot processing mechanical arm slides on the slide rail through the gear and the rack; the welding gun is arranged at the end of the hot processing mechanical arm, and a welding morphology monitoring device is arranged next to the welding gun.

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