Electric heating and oil cooling temperature control device and method for controlling temperature of laser cladding base material

Abstract

The invention relates to the technical field of laser cladding additive manufacturing, in particular to an electric heating and oil cooling temperature control device and method for controlling the temperature of a laser cladding base material. The device comprises a rectangular thermostatic bath, wherein a resistance heater and a heat-conducting oil pipe are arranged in the thermostatic bath; the resistance heater is connected in series with a heating relay and then connected with an external power supply; one end of the heat-conducting oil pipe is connected in series with the heat-conducting oil pump and then extends into the heat-conducting oil tank; heat conduction oil is contained in the heat conduction oil tank; the heat-conducting oil pump is connected with an external power supply after being connected with the output end of the oil pump relay in series; and a thermocouple is arranged in the thermostatic bath and is connected with a temperature measuring port of the PLC temperature controller. According to the device and the method provided by the invention, the preheating temperature before cladding and the post-heating temperature after cladding can be accurately controlled, and the risks of deformation of a cladding base material and cracking of a coating are reduced; and the substrate temperature in the cladding stage can be rapidly reduced, the heat flow peak is eliminated, and the risk that small parts or thin-wall parts are burnt out is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of laser cladding additive manufacturing, and in particular to an electric heating and oil cooling temperature control device and method for controlling the temperature of a laser cladding substrate. Background Art

[0002] Laser cladding technology is a new additive manufacturing technology developed in recent years. It uses laser as a heat source to heat and melt the powder particles sprayed from the spray gun or the powder pre-laid on the surface of the substrate, and forms a coating with special functions after solidification. Compared with conventional thermal spraying technologies such as flame spraying and plasma spraying, laser cladding technology has the advantages of high coating density, low parent material dilution rate, small heat-affected zone, and high bonding strength. It can prepare highly corrosion-resistant and wear-resistant metals or metal-ceramic materials on the surface of parts, which can be used to improve the corrosion and wear resistance of marine engineering equipment such as ship tail shafts and exposed gears, and has broad application prospects.

[0003] However, the laser heat source is concentrated. For large parts, due to the large temperature gradient between the cladding area and the surrounding substrate, not only the substrate is prone to deformation, but also the coating is very likely to produce thermal cracks, which affects the bonding strength between the coating and the substrate. In addition, corrosive media such as seawater are easy to penetrate into the coating or substrate interface along the cracks, reducing the corrosion resistance of the coating. For small parts and thin-walled parts, due to heat accumulation, the parts are easily ablated.

[0004] Therefore, for large parts, it is necessary to preheat the substrate reasonably before laser cladding, and then perform insulation and post-heat treatment after cladding to avoid deformation and cracking; for small or thin-walled parts, it is necessary to strengthen the heat dissipation of the substrate during the cladding process, reduce the peak temperature of the substrate, and avoid burning.

[0005] In the prior art, methods for controlling the temperature of laser cladding substrates include air cooling and water cooling. The air cooling method has high noise and poor heat conduction performance, while the water cooling method is easily affected by temperature and environment.

[0006] Therefore, in order to solve the above problems, the present invention provides an electric heating oil cooling temperature control device and method for controlling the temperature of a laser cladding substrate with accurate temperature control. Summary of the invention

[0007] In order to solve the problem of large temperature gradient between the cladding area of ​​large parts and the surrounding substrate due to concentrated laser heat source and ablation of small and thin-walled parts due to heat concentration, the present invention provides an electric heating and oil cooling temperature control device and method for controlling the temperature of laser cladding substrate with precise temperature control.

[0008] To achieve the above purpose, the present invention provides the following technical solutions: An electric heating oil cooling temperature control device for controlling the temperature of a laser cladding substrate comprises a rectangular constant temperature tank in which a resistance heater and a heat conducting oil pipe are arranged; The resistance heater is connected in series with a heating relay and then connected to an external power supply; One end of the heat transfer oil pipe is connected in series with the heat transfer oil pump and then extends into the heat transfer oil tank, and the other end of the heat transfer oil pipe extends into the heat transfer oil tank; The thermal oil tank contains thermal oil; the thermal oil pump is connected in series with the output end of the oil pump relay and then connected to an external power supply; a thermocouple is installed in the constant temperature bath, and the thermocouple is connected to the temperature measuring port of the PLC temperature controller.

[0009] The present invention adopts a combined heat transfer method of electric heating and heat transfer oil controlled by a PLC temperature controller, which can accurately control the preheating temperature before cladding and the post-heating temperature after cladding, reduce the temperature gradient in the cladding zone, and reduce the risk of deformation of the cladding substrate and cracking of the coating; the present invention adopts a forced convection heat transfer scheme of heat transfer oil, which can quickly reduce the substrate temperature in the cladding stage, eliminate the heat flow peak, and avoid the risk of small parts or thin-walled parts being burned; the present invention adopts electric heating oil cooling temperature control technology, and the thermal conductivity of the heat transfer oil is better than that of air, which can take away the heat generated by the equipment more quickly and improve the cooling efficiency. Compared with the air cooling method, the oil cooling method has lower noise and provides a quieter working environment; and the oil cooling temperature control device is not affected by the ambient temperature, can work normally in harsh environments, and has good environmental adaptability.

[0010] According to an embodiment of the present application, in the thermostatic bath, a heat-conducting support platform is provided on the upper layer of the resistance heater and the heat-conducting oil pipe.

[0011] The heat-conducting support platform is used to support and conduct heat, which helps to transfer heat from the heat source to the cooling system.

[0012] According to one embodiment of the present application, a flexible heat-conducting platform is laid on the heat-conducting support platform, and the flexible heat-conducting platform is a powder layer that is resistant to high temperatures, has high thermal conductivity and is easy to shape.

[0013] The flexible heat-conducting platform adopts a shapeable heat-conducting powder structure, which can fit tightly with non-planar parts and has high heat diffusion efficiency. It can be applied to flat parts, cylindrical parts and other special-shaped parts, and has strong applicability to part shapes.

[0014] According to one embodiment of the present application, the outer layer of the thermostatic bath has a heat insulation layer.

[0015] Wherein, the function of the thermal insulation layer is to provide thermal insulation and heat preservation effects.

[0016] According to one embodiment of the present application, the thermocouple is installed in the middle position of the constant temperature bath.

[0017] With the above technical solution, installing the thermocouple in the middle of the thermostatic bath helps to more accurately monitor the average temperature of the liquid in the entire bath and ensure temperature uniformity. This can avoid edge effects, ensure consistent temperatures throughout the bath, and avoid placing the thermocouple close to heating elements or cooling pipes, reducing the risk of local overheating or overcooling, thereby improving the stability and reliability of temperature control.

[0018] According to an embodiment of the present application, the resistance heater and the heat-conducting oil pipe are evenly arranged in the constant temperature bath, and the heat-conducting oil pipe is evenly arranged in the gap of the resistance heater.

[0019] The purpose of adopting the above technical solution is to ensure that heat can be evenly transferred to the entire heated area to maximize the heat transfer efficiency, and to avoid excessive concentration of the heat transfer oil pipes to prevent local overheating, which may cause material damage or uneven heating.

[0020] According to an embodiment of the present application, the thermostatic bath is made of steel.

[0021] The above technical solution is adopted to make the steel material resistant to high temperature and corrosion and suitable for various working environments.

[0022] The present invention also provides an operating method of an electric heating oil cooling temperature control device for controlling the temperature of a laser cladding substrate. The operating method comprises the following steps using the electric heating oil cooling temperature control device for controlling the temperature of a laser cladding substrate as described above: S1. Placing the substrate: stably placing the substrate on which the coating is to be prepared by laser cladding technology on a flexible heat-conducting table; S2, parameter setting: turn on the power of the PLC temperature controller, set the constant temperature T0, insulation time t0 and high temperature critical temperature T1; The constant temperature T0 is the preheating temperature or post-heating temperature of the substrate; t0 is the sum of the preheating time of the substrate, the laser cladding processing time and the post-heating time; T1 is the maximum temperature that the substrate can withstand during the substrate cladding process; S3, automatic control operation: start the operation button of the PLC temperature controller, and the PLC temperature controller starts to measure temperature and time; When the temperature T measured by the thermocouple is lower than the preset constant temperature T0, the heating relay is closed and the resistance heater starts heating; when the measured temperature T reaches the preset constant temperature T0 but is lower than the high temperature critical temperature T1, the natural cooling temperature control mode is entered, the heating relay is automatically disconnected, and the resistance heater stops heating; S4, processing end: after reaching the preset insulation time t0, turn off the power of the PLC temperature controller and remove the substrate.

[0023] By adopting the above technical solution, constant temperature preheating before laser cladding and constant temperature post-heat treatment after cladding can be achieved, reducing the risk of substrate deformation and cracking.

[0024] According to one embodiment of the present application, when the measured temperature T is higher than the preset high temperature critical temperature T1, it indicates that the laser beam starts to heat the powder, and a coating will be deposited on the surface of the substrate, and at the same time, the forced cooling temperature control mode is entered, the oil pump relay is closed, the thermal oil pump is started, and the low-temperature thermal oil flows through the constant temperature bath, takes away the heat from the surface of the substrate, and then flows back to the thermal oil tank; When the temperature drops below T1, the oil pump relay is disconnected, the thermal oil pump is turned off, and the natural cooling mode is entered until the preset insulation time t0 ends.

[0025] By adopting the above technical solution, the peak temperature of the substrate during laser cladding can be reduced, and the ablation damage of small substrates can also be avoided.

[0026] According to an embodiment of the present application, the convex and concave arc structures on the bottom surface of the substrate are tightly fitted with the thermally conductive powder of the flexible thermally conductive platform.

[0027] The purpose of adopting the above technical solution is to improve the heat diffusion efficiency.

[0028] Compared with the prior art, the present invention provides an electric heating oil cooling temperature control device and method for controlling the temperature of a laser cladding substrate, which can accurately control the preheating temperature before cladding and the post-heating temperature after cladding, reduce the temperature gradient in the cladding zone, reduce the risk of deformation of the cladding substrate and cracking of the coating, quickly reduce the temperature of the substrate in the cladding stage, eliminate the heat flow peak, and avoid the risk of small parts or thin-walled parts being burned; the present invention adopts electric heating oil cooling temperature control technology, and the thermal conductivity of the heat transfer oil is better than that of air, which can take away the heat generated by the equipment more quickly and improve the cooling efficiency. Compared with the air cooling method, the oil cooling method has lower noise and provides a quieter working environment; and the oil cooling temperature control device is not affected by the ambient temperature, can work normally in harsh environments, and has good environmental adaptability.

[0029] In the preferred embodiment, the flexible heat-conducting platform adopts a plastic heat-conducting powder structure, which can fit tightly with non-planar parts and has high heat diffusion efficiency. It can be applied to flat parts, cylindrical parts and other special-shaped parts, and has strong applicability to part shapes. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 paying creative work.

[0031] Figure 1 A top view of an electric heating and oil cooling temperature control device for controlling the temperature of a laser cladding substrate provided by the present invention; Figure 2 A front view of an electric heating and oil cooling temperature control device for controlling the temperature of a laser cladding substrate provided by the present invention; Figure 3 A control logic flow chart of an electric heating and oil cooling temperature control device for controlling the temperature of a laser cladding substrate provided by the present invention.

[0032] Reference numerals: DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments 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.

[0034] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are 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 limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0035] In order to solve the problem of large temperature gradient between the cladding area of ​​large parts and the surrounding substrate due to concentrated laser heat source and ablation of small and thin-walled parts due to heat concentration, the present invention provides an electric heating and oil cooling temperature control device and method for controlling the temperature of laser cladding substrate with precise temperature control.

[0036] Specifically, Figure 1 As shown, an embodiment of the present application provides an electric heating oil cooling temperature control device for controlling the temperature of a laser cladding substrate, comprising a rectangular constant temperature tank 01, in which a resistance heater 02 and a heat conducting oil pipe 04 are arranged; The resistance heater 02 is connected in series with the heating relay 03 and then connected to the external power supply; One end of the heat transfer oil pipe 04 is connected in series with the heat transfer oil pump 05 and then extends into the heat transfer oil tank 06, and the other end of the heat transfer oil pipe 04 extends into the heat transfer oil tank 06; The thermal oil tank 06 contains thermal oil 07; the thermal oil pump 05 is connected in series with the output end of the oil pump relay 08 and then connected to an external power supply; a thermocouple 09 is installed in the constant temperature bath 01, and the thermocouple 09 is connected to the temperature measuring port of the PLC temperature controller 10.

[0037] The present invention provides an electric heating oil cooling temperature control device for controlling the temperature of a laser cladding substrate. The device adopts a combined heat transfer method of electric heating and heat transfer oil controlled by a PLC temperature controller, and can accurately control the preheating temperature before cladding and the post-heating temperature after cladding, thereby reducing the temperature gradient in the cladding zone and reducing the risk of deformation of the cladding substrate and cracking of the coating. The temperature control device of the present invention also adopts a heat transfer solution of heat transfer oil, which can quickly reduce the temperature of the substrate in the cladding stage, eliminate the heat flow peak, and avoid the risk of small parts or thin-walled parts being burned. In addition, the temperature control device of the present invention also adopts electric heating oil cooling temperature control technology. The thermal conductivity of the heat transfer oil is better than that of air, and it can take away the heat generated by the equipment more quickly, thereby improving the cooling efficiency. Compared with the air cooling method, the oil cooling method has lower noise and provides a quieter working environment. Moreover, the oil cooling temperature control device is not affected by the ambient temperature, can work normally in harsh environments, and has good environmental adaptability.

[0038] Specifically, in the thermostatic bath 01 , a heat-conducting support platform 11 is disposed on the upper layer of the resistance heater 02 and the heat-conducting oil pipe 04 .

[0039] The heat-conducting support platform is used to support and conduct heat, which helps to transfer heat from the heat source to the cooling system.

[0040] Specifically, a flexible heat-conducting platform 12 is laid on the heat-conducting support platform 11 , and the flexible heat-conducting platform 12 is a powder layer that is resistant to high temperatures, has high heat conductivity, and is easy to shape.

[0041] The flexible heat-conducting platform adopts a shapeable heat-conducting powder structure, which can fit tightly with non-planar parts and has high heat diffusion efficiency. It can be applied to flat parts, cylindrical parts and other special-shaped parts, and has strong applicability to part shapes.

[0042] Specifically, the outer layer of the thermostatic bath 01 has a heat insulating layer 13, and the function of the heat insulating layer is to provide heat insulation and thermal insulation effects.

[0043] Specifically, the thermocouple 09 is installed in the middle of the thermostatic bath 01 .

[0044] With the above technical solution, installing the thermocouple in the middle of the thermostatic bath helps to more accurately monitor the average temperature of the liquid in the entire bath and ensure temperature uniformity. This can avoid edge effects, ensure consistent temperatures throughout the bath, and avoid placing the thermocouple close to heating elements or cooling pipes, reducing the risk of local overheating or overcooling, thereby improving the stability and reliability of temperature control.

[0045] Specifically, the resistance heater 02 and the heat-conducting oil pipe 04 are evenly arranged in the constant temperature bath 01 , and the heat-conducting oil pipe 04 is evenly arranged in the gap of the resistance heater 02 .

[0046] The purpose of adopting the above technical solution is to ensure that heat can be evenly transferred to the entire heated area to maximize the heat transfer efficiency, and to avoid excessive concentration of the heat transfer oil pipes to prevent local overheating, which may cause material damage or uneven heating.

[0047] Specifically, the thermostatic bath 01 is made of steel.

[0048] The above technical solution is adopted to make the steel material resistant to high temperature and corrosion and suitable for various working environments.

[0049] The present invention also provides an operating method of an electric heating oil cooling temperature control device for controlling the temperature of a laser cladding substrate. The operating method comprises the following steps using the electric heating oil cooling temperature control device for controlling the temperature of a laser cladding substrate as described above: like Figure 2 and Figure 2 As shown: S1. Placing the substrate: stably placing the substrate 14 to be coated by laser cladding technology on the flexible heat-conducting platform 12; S2, parameter setting: turn on the power supply of the PLC temperature controller 10, set the constant temperature T0, the insulation time t0 and the high temperature critical temperature T1; The constant temperature T0 is the preheating temperature or post-heating temperature of the substrate; t0 is the sum of the preheating time of the substrate, the laser cladding processing time and the post-heating time; T1 is the maximum temperature that the substrate can withstand during the substrate cladding process; S3, automatic control operation: start the operation key of the PLC temperature controller 10, and the PLC temperature controller 10 starts temperature measurement and timing; Among them, Figure 3 As shown, when the temperature T measured by the thermocouple 09 is lower than the preset constant temperature T0, the heating relay 03 is closed, and the resistance heater 02 starts heating; wherein, when the measured temperature T reaches the preset constant temperature T0 but is lower than the high temperature critical temperature T1, the natural cooling temperature control mode is entered, the heating relay 03 is automatically disconnected, and the resistance heater 02 stops heating; S4, processing end: after reaching the preset heat preservation time t0, turn off the power of the PLC temperature controller 10 and remove the substrate 14.

[0050] By adopting the above technical solution, constant temperature preheating before laser cladding and constant temperature post-heat treatment after cladding can be achieved, reducing the risk of substrate deformation and cracking.

[0051] More specifically, if Figure 3 As shown, when the measured temperature T is higher than the preset high temperature critical temperature T1, it indicates that the laser beam 15 starts to heat the powder, and a coating 16 will be deposited on the surface of the substrate 14, and at the same time, it enters the forced cooling temperature control mode, the oil pump relay 08 is closed, the thermal oil pump 05 is started, and the low-temperature thermal oil flows through the constant temperature bath 01, takes away the heat from the surface of the substrate 14, and then flows back to the thermal oil tank 06; When the temperature drops below T1, the oil pump relay 08 is disconnected, the thermal oil pump 05 is turned off, and the natural cooling mode is entered until the preset insulation time t0 ends.

[0052] By adopting the above technical solution, the peak temperature of the substrate during laser cladding can be reduced, and the ablation damage of small substrates can also be avoided.

[0053] Specifically, the convex and concave arc structures on the bottom surface of the substrate 14 are closely attached to the thermally conductive powder of the flexible thermally conductive platform 12 .

[0054] The purpose of adopting the above technical solution is to improve the heat diffusion efficiency.

[0055] In summary, the present invention provides an electric heating oil cooling temperature control device and method for controlling the temperature of a laser cladding substrate, which can accurately control the preheating temperature before cladding and the post-heating temperature after cladding, reduce the temperature gradient in the cladding zone, reduce the risk of deformation of the cladding substrate and cracking of the coating, quickly reduce the substrate temperature in the cladding stage, eliminate the heat flow peak, and avoid the risk of small parts or thin-walled parts being burned.

[0056] Although the terms such as constant temperature bath, thermal support platform and flexible thermal platform are used more frequently in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electric heating and oil cooling temperature control device for controlling the temperature of a laser cladding substrate, characterized in that: It comprises a rectangular constant temperature bath (01), wherein a resistance heater (02) and a heat transfer oil pipe (04) are arranged in the constant temperature bath (01); The resistance heater (02) is connected in series with a heating relay (03) and then connected to an external power supply; One end of the heat transfer oil pipe (04) is connected in series with the heat transfer oil pump (05) and then extends into the heat transfer oil tank (06), and the other end of the heat transfer oil pipe (04) extends into the heat transfer oil tank (06); The thermal oil tank (06) contains thermal oil (07); the thermal oil pump (05) is connected in series with the output end of the oil pump relay (08) and then connected to an external power supply; a thermocouple (09) is installed in the constant temperature bath (01), and the thermocouple (09) is connected to the temperature measurement port of the PLC temperature controller (10).

2. The electric heating and oil cooling temperature control device for controlling the temperature of the laser cladding substrate according to claim 1 is characterized in that: In the constant temperature bath (01), a heat conduction support platform (11) is provided on the upper layer of the resistance heater (02) and the heat conduction oil pipe (04).

3. The electric heating and oil cooling temperature control device for controlling the temperature of the laser cladding substrate according to claim 2 is characterized in that: A flexible heat-conducting platform (12) is laid on the heat-conducting support platform (11), and the flexible heat-conducting platform (12) is a powder layer that is resistant to high temperatures, has high heat conductivity and is easy to shape.

4. The electric heating and oil cooling temperature control device for controlling the temperature of the laser cladding substrate according to claim 1 is characterized in that: The thermostatic bath (01) has a heat insulating layer (13) on its outer layer.

5. The electric heating and oil cooling temperature control device for controlling the temperature of the laser cladding substrate according to claim 1 is characterized in that: The thermocouple (09) is installed in the middle of the thermostatic bath (01).

6. The electric heating and oil cooling temperature control device for controlling the temperature of the laser cladding substrate according to claim 1 is characterized in that: The resistance heater (02) and the heat-conducting oil pipe (04) are evenly arranged in the constant temperature bath (01), and the heat-conducting oil pipe (04) is evenly arranged in the gap of the resistance heater (02).

7. The electric heating and oil cooling temperature control device for controlling the temperature of the laser cladding substrate according to claim 1 is characterized in that: The thermostatic bath (01) is made of steel.

8. An operating method of an electric heating oil cooling temperature control device for controlling the temperature of a laser cladding substrate, characterized in that: The electric heating and oil cooling temperature control device for controlling the temperature of the laser cladding substrate according to any one of claims 1 to 7 is used, and the operation method comprises the following steps: S1, placing a substrate: stably placing a substrate (14) on which a coating is to be prepared using a laser cladding technique on a flexible heat-conducting platform (12); S2, parameter setting: turn on the power of the PLC temperature controller (10), set the constant temperature T0, the insulation time t0 and the high temperature critical temperature T1; The constant temperature T0 is the preheating temperature or post-heating temperature of the substrate; t0 is the sum of the preheating time of the substrate, the laser cladding processing time and the post-heating time; T1 is the maximum temperature that the substrate can withstand during the substrate cladding process; S3, automatic control operation: start the operation key of the PLC temperature controller (10), and the PLC temperature controller (10) starts temperature measurement and timing; When the temperature T measured by the thermocouple (09) is lower than the preset constant temperature T0, the heating relay (03) is closed and the resistance heater (02) starts heating; when the measured temperature T reaches the preset constant temperature T0 but is lower than the high temperature critical temperature T1, the natural cooling temperature control mode is entered, the heating relay (03) is automatically disconnected, and the resistance heater (02) stops heating; S4, processing end: after reaching the preset holding time t0, turn off the power of the PLC temperature controller (10) and remove the substrate (14).

9. The operating method of the electric heating oil cooling temperature control device for controlling the temperature of the laser cladding substrate according to claim 8 is characterized in that: When the measured temperature T is higher than the preset high temperature critical temperature T1, it indicates that the laser beam (15) starts to heat the powder, and a coating (16) will be deposited on the surface of the substrate (14), and at the same time enters the forced cooling temperature control mode, the oil pump relay (08) is closed, the thermal oil pump (05) is started, and the low-temperature thermal oil flows through the constant temperature bath (01), takes away the heat from the surface of the substrate (14) and then flows back to the thermal oil tank (06); When the temperature drops below T1, the oil pump relay (08) is disconnected, the thermal oil pump (05) is turned off, and the natural cooling mode is entered until the preset insulation time t0 ends.

10. The operating method of the electric heating and oil cooling temperature control device for controlling the temperature of the laser cladding substrate according to claim 8, characterized in that: The convex and concave arc structures on the bottom surface of the substrate (14) are tightly fitted with the thermally conductive powder of the flexible thermally conductive platform (12).

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