CN113333976B - Tungsten carbide powder core wire double-induction and electric arc composite heating material increasing device and method - Google Patents

Abstract

The invention discloses a tungsten carbide powder core wire double-induction and electric arc composite heating material increasing device and method. This vibration material disk process adopts response high frequency heating front metal, the two induction heating of tungsten carbide powder core wire material induction heating module and lift formula induction heating module before vibration material disk to adopt two infrared synchronous temperature measurement modes, control the heating temperature of tungsten carbide powder core wire material and front metal respectively, realize that plasma arc and induction combined heating's mode carry out the vibration material disk. According to the invention, the temperature of the tungsten carbide deposited matrix is effectively raised by induction heating of the front layer metal, the generation of cracks in the tungsten carbide material increase process is inhibited, and the problem of cracking between deposited layers is solved; meanwhile, the induction heating is utilized to heat the tungsten carbide powder core wire material, the temperature of the tungsten carbide powder core wire material is increased, the difficult problems of tungsten carbide powder core wire material melting and interlayer fusion difficulty are solved through composite heating with electric arcs, and the tungsten carbide additive member prepared by the method is more compact in structure and more stable in performance.

Description

Double induction and arc composite heating additive device and method for tungsten carbide powder core wire

technical field

The invention belongs to the technical field of arc additive manufacturing, and mainly relates to a double induction and arc composite heating additive device and method for tungsten carbide powder core wire.

Background technique

As a cemented carbide, tungsten carbide is widely used in military industry, aerospace industry due to its high hardness, wear resistance, good strength and toughness, heat resistance, corrosion resistance and a series of excellent properties, especially its high hardness and wear resistance. , machining, metallurgy, oil drilling, mining tools, electronic communications, construction and other fields. However, due to its characteristics of large thermal expansion coefficient and strong temperature sensitivity, it has the shortcomings of high brittleness and poor toughness, which leads to defects such as cracks, shrinkage cavities, and poor fusion in arc deposition, and it is impossible to achieve multi-layer continuous growth. material manufacturing. At present, laser or electron beam powder materials are the main materials for tungsten carbide additive materials. Although these two methods can realize additive manufacturing of tungsten carbide powders, they both have low additive efficiency and low density of additive parts. , The lack of poor molding accuracy.

The patent "Manufacturing Method of Cemented Carbide Parts" (application number: 201811006376.8) discloses a method of laser scanning for cemented carbide parts, which makes the base plate in a higher temperature state through high-energy beam scanning, reducing the reduction of cemented carbide parts forming stress, thereby reducing its tendency to crack. However, this method cannot control the preheating temperature when preheating the bottom plate, and the equipment cost is relatively high. At the same time, because it uses powder, the utilization rate of the material is low, the waste is serious, and the compactness of the molded part is not high. The patent "Laser Cladding Tungsten Carbide Ceramic Particle Reinforced Metal-Based Coating and Its Processing Method" (application number: 201510601351.2) discloses a method for preparing tungsten carbide ceramic particle reinforced metal-based coating by laser cladding. The method realizes the preparation of the tungsten carbide coating, but the surface of the coating is poorly formed and the overall density is not high. The use of powder-core tungsten carbide wire arc additive manufacturing instead of laser or electron beam powder as the raw material for additive manufacturing not only avoids the phenomenon of powder blowing in powder additive, but also has low equipment cost, high additive efficiency, process simplification, and molding. The advantage of high density.

SUMMARY OF THE INVENTION

The present invention aims to provide a dual induction and arc composite heating additive device and method for tungsten carbide powder core wire, which can effectively reduce the tendency of cracks in the process of adding tungsten carbide powder core wire, and improve the forming internal structure of the additive component. density, enhance the quality of additive components and improve the efficiency of additive molding.

In order to achieve the above-mentioned purpose, the technical scheme adopted by the present invention is:

A tungsten carbide powder core wire dual induction and arc composite heating additive device, which is composed of a tungsten carbide powder core wire induction heating module, a lifting induction heating module, a temperature sensing control module, a dual induction heating controller and a touch screen automatic heating module. Control platform composition.

The tungsten carbide powder core wire induction heating module is composed of a high frequency power supply I, an insulating ceramic tube, a wire induction coil, a heat shield, and a protective shell. The high frequency power supply I provides high frequency current to the wire induction coil, and high frequency induction heating Through the tungsten carbide powder core wire of the insulating ceramic tube, its start and stop are controlled by sending signals to the dual induction heating power controller through the robot control cabinet;

The lifting induction heating module is composed of a high frequency power supply II, a metal induction heating coil, a pneumatic device and a coil lifting control box. Stop sending signals through the robot control cabinet to the dual induction heating power controller for control; the lifting of the metal induction heating coil sends a signal to the coil lifting control box through the robot control cabinet for control, and then adjusts the air pressure control through the pneumatic device;

The temperature sensing control module consists of infrared temperature sensor I, infrared temperature sensor II and dual temperature measurement and control instruments. The dual temperature measurement and control instruments simultaneously detect the temperature of the tungsten carbide powder core wire and the front layer metal near the arc position;

The touch-screen automatic control platform displays the temperature information of the tungsten carbide powder core wire and the front layer metal measured by the dual temperature measurement and control instrument, the status of the high-frequency power supply I and the high-frequency power supply II, and the lifting status information of the metal induction coil.

Its special feature is: the infrared temperature sensor I and the infrared temperature sensor II are placed coaxially with the plasma welding torch, and are jointly fixed on the mechanical bracket connected to the end of the robot. The infrared temperature sensor I and the plasma welding torch are placed coaxially and parallel. The included angle between the sensor II and the vertical direction of the welding torch ranges from 30° to 60°, which is realized by joint adjustment; the fixed end of the metal induction heating coil is connected to the pneumatic device, and the metal induction heating coil passes through the mechanical support through the heat insulation sleeve, and the pneumatic The device drives the metal induction heating coil to lift and lower, the diameter of the heat insulating sleeve is 10-30mm, and the inner wall of the sleeve is covered with a layer of heat insulating anti-skid coating.

Based on the above-mentioned dual-induction and arc composite heating and additive device for tungsten carbide powder core wire, the present invention also provides a method for using the above device to add material to tungsten carbide powder core wire. The specific steps are as follows:

Step 1: After selecting the plasma arc additive process parameters of the tungsten carbide powder core wire, the robot control cabinet and the touch screen automatic control platform start to start;

Step 2: First, the touch-screen automatic control platform sends a control signal through the robot control cabinet connected to it. The robot control cabinet simultaneously activates the high-frequency power supply I and the high-frequency power supply II through the dual induction heating power controller, according to the set induction heating frequency. The tungsten carbide powder core wire and the front layer metal are heated respectively with the heating current; at the same time, the touch screen automatic control platform activates the infrared temperature sensor I and the infrared temperature sensor II through the dual temperature measurement and control instrument connected to it, and starts to collect the tungsten carbide powder core. The temperature information of the wire and the front layer metal, the temperature information is simultaneously sent to the display screen on the touch screen automatic control platform for real-time display;

Step ₃ : According to the predetermined heating temperature T1 of the tungsten carbide powder core wire and the predetermined heating temperature T2 _of the front layer metal set according to the automatic control platform of the touch screen, when the infrared temperature sensor I detects that the tungsten carbide powder core wire reaches the predetermined heating temperature When the temperature is T1, the touch screen automatic control platform sends _a control signal to the high-frequency power supply I through the double induction heating power controller connected to it, and adjusts the induced current in real time, so that the temperature of the tungsten carbide powder core wire is maintained at T1 _; When the infrared temperature sensor II11 detects that the front layer metal 1 reaches the predetermined heating temperature T2, the _dual temperature measurement and control instrument sends a switch signal to the robot control cabinet, and the robot control cabinet turns off the high-frequency power supply II through the dual induction heating power control instrument, and stops heating, Then control the coil lifting control box connected to it to adjust the air pressure of the pneumatic device, and the pneumatic device drives the metal heating coil to elevate the predetermined height H ₁ along the vertical direction of the welding torch through the heat insulating sleeve;

Step 4: After the plasma torch ignites the arc according to the predetermined process parameters, the touch-screen automatic control platform sends a signal to the robot control cabinet, and controls the wire feeding device to feed the arc to melt the additive according to the predetermined wire feeding speed. At the same time, the infrared temperature sensor I is online The heating temperature of tungsten carbide powder core wire is detected in real time, the wire temperature measurement data is sent to the touch screen automatic control platform for display, and the control signal is sent to the high-frequency power supply I through the double-induction heating power controller connected to it. The induced current is adjusted in real time, so that the temperature of the tungsten carbide powder core wire is maintained at the preset temperature T ₁ . On the other hand, after the arc is ignited, the touch screen automatic control platform sends a signal to the robot control cabinet, and the infrared temperature is turned off through the dual temperature measuring and control instrument. Measurement of sensor II11;

Step 5: Complete the single-channel additive process according to the set robot program. Before the arc is extinguished, the touch-screen automatic control platform sends a signal to the robot control cabinet, controls the wire feeding device to stop wire feeding, and then sends a control signal to the robot control cabinet through the robot control cabinet. Double induction heating power controller, turn off the high-frequency power supply I, stop heating the wire, and send a control signal to the coil lift control box to adjust the air pressure of the pneumatic device. To the original position, also close the measurement of the infrared temperature sensor I through the dual temperature measurement and control instrument;

Step 6: According to the above relevant steps, the robot arc additive program is repeated until the additive of the predetermined size component is completed.

Preferably, the preheating temperature of the tungsten carbide powder core wire is 300-800°C.

Preferably, the preheating temperature of the front layer metal is 80-250°C.

Preferably, the height H ₁ of the coil lifting is 40-80 mm.

Preferably, the heating frequency f1 of the high-frequency power supply _I is 80-120KHz, the heating current _I1 is 50-160A, the heating frequency f2 of the high-frequency power supply _II is 160-300KHz, and the heating current _I2 is 150-300A.

Compared with the prior art, the present invention has the following significant advantages: 1. a dual induction and arc composite heating additive device for tungsten carbide powder core wire proposed by the present invention uses plasma arc to melt tungsten carbide powder core wire, compared with laser or electron beam powder additive, the equipment cost is low, and the additive efficiency is higher; ② the dual induction heating mode of the induction heating powder core tungsten carbide wire and the induction preheating front layer metal used in the present invention effectively improves the quality of the wire and the front layer. The temperature of the layer metal changes the temperature heat dissipation conditions, and effectively avoids the generation of interlayer cracks in the arc tungsten carbide powder core additive material; 3. The method of the present invention adopts the dual infrared temperature online control mode to detect the induction heating of the wire and the molten pool in real time. Real-time and timely heating temperature, effectively improve the melting characteristics of wire tungsten carbide powder core, improve the forming quality and dimensional accuracy of each cladding layer, and control the uniformity of the structure and properties of the cladding layer.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of the double induction and arc composite heating additive device for tungsten carbide powder core wire;

1 is the front layer metal, 2 is the metal induction heating coil, 3 is the tungsten carbide powder core wire, 4 is the high frequency power supply I401 of the tungsten carbide powder core wire induction heating device, the insulating ceramic tube 402, the wire induction coil 403, the insulation Hot plate 404, protective shell 405, 5 is a wire feeding device, 6 is a high frequency power supply II, 7 is a pneumatic device, 8 is a plasma welding torch, 9 is an adiabatic sleeve, 10 is an infrared temperature sensor I, and 11 is an infrared temperature sensor II , 12 is a dual temperature measurement and control instrument, 13 is a mechanical support, 14 is a robot, 15 is a robot control cabinet, 16 is a coil lift control box, 17 is a dual-induction heating power controller, and 18 is a touch screen automatic control platform.

Figure 2 is a flow chart of the double induction and arc composite heating additive method for tungsten carbide powder core wire.

Figure 3 is an additive block of tungsten carbide powder core wire material with a tungsten carbide content of 10%.

Figure 4 is a 500-fold metallographic diagram of the cladding layer using a tungsten carbide powder core wire with a tungsten carbide content of 10%.

Figure 5 is a tungsten carbide powder core wire additive block with a tungsten carbide content of 20%.

Figure 6 is a 500-fold metallographic diagram of the cladding layer using a tungsten carbide powder core wire with a tungsten carbide content of 20%.

Detailed ways

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the protection scope of the present invention can be more clearly defined.

The dual-induction and arc composite heating additive device for tungsten carbide powder core wire described in the present invention specifically adopts the following equipment: a robot plasma arc additive platform, a MOTOMAN MH6 arc welding robot, and a DX100 robot control cabinet, and the welding power source is: Fronius MagicWave 3000, plasma control cabinet, plasma torch, VK-K8100IR infrared temperature sensor, ZHCGP-06/JXG-60-A high frequency power supply.

Referring to Figure 1, a dual induction and arc composite heating additive device for tungsten carbide powder core wire of the present invention is mainly composed of a tungsten carbide powder core wire induction heating module, a lift-type induction heating module, a temperature sensing control module, a dual induction heating module, and a dual induction heating module. It consists of heating controller and touch screen automatic control platform. The tungsten carbide powder core wire induction heating module is composed of a high-frequency power supply I401, an insulating ceramic tube 402, a wire induction coil 403, a heat insulation plate 404, and a protective shell 405. The high-frequency power supply I401 provides high-frequency current to the wire induction coil 403. , the high-frequency induction heating passes through the tungsten carbide powder core wire 3 of the insulating ceramic tube 402, and its start and stop are controlled by sending signals to the dual induction heating power controller 17 through the robot control cabinet 15. The lifting induction heating module is composed of a high frequency power supply II6, a metal induction heating coil 2, a pneumatic device 7 and a coil lifting control box 16. The high frequency power supply II6 provides a high frequency current to the metal induction heating coil 2, and heats the front layer through high frequency induction. Metal 1, its start and stop are controlled by sending signals to the dual induction heating power controller 17 through the robot control cabinet 15; the fixed end of the metal induction heating coil 2 is connected to the pneumatic device 7, and is passed through a heat insulating sleeve 9 with a diameter of 15mm. The mechanical support 13, wherein the inner wall of the heat insulating sleeve 9 is coated with a heat insulating anti-skid coating. The robot control cabinet 15 sends a signal to the coil lifting control box 16 to control the pneumatic device 7 to adjust the air pressure to drive the metal induction heating coil 2 to lift and lower. The temperature sensing control module consists of an infrared temperature sensor I10, an infrared temperature sensor II11 and a dual temperature measurement and control instrument 12. The infrared temperature sensor I10 and the infrared temperature sensor II11 are placed coaxially with the plasma torch 8, and are fixed together on the mechanical bracket connected to the end of the robot 14. 13, the infrared temperature sensor I10 is placed coaxially and parallel to the plasma welding torch 8, and the angle range between the infrared temperature sensor II11 and the vertical direction of the welding torch is 45°, which is realized by joint adjustment; the dual temperature measurement and control instrument 12 simultaneously detects the tungsten carbide near the arc position The temperature of the core wire 3 and the front layer metal 1. The touch screen automatic control platform 18 displays the temperature information of the tungsten carbide powder core wire 3 and the front layer metal 1 measured by the dual temperature measurement and control instrument 12, the status of the high-frequency power supply I401 and the high-frequency power supply II6, and the lifting status information of the metal induction coil 2. Wait.

Its working mode is: 1. Perform geometric modeling of additive components, plan and design the slicing path of the part model and import it into the touch-screen automatic control platform, and select appropriate parameters according to the material to set; 2. The touch-screen automatic control platform starts to work and sends The signal is sent to the robot control cabinet to start the high-frequency power supply through the dual induction heating power controller to heat the tungsten carbide powder core wire and the front layer metal respectively according to the preset parameters; at the same time, the touch screen automatic control platform starts the infrared temperature through the dual temperature measurement and control instrument. The sensor collects the temperature of the tungsten carbide powder core wire and the front layer metal respectively; 3 When the tungsten carbide powder core wire reaches the predetermined temperature, the touch screen automatic control platform controls the induction current of the high frequency power supply through the dual induction heating power controller, so that the The temperature of the tungsten carbide powder core wire is maintained at the preset temperature; at the same time, when the front layer metal reaches the predetermined temperature, the dual-induction heating power controller turns off the high-frequency heating power supply of the front layer metal, and the touch screen automatic control platform controls the robot control cabinet. The coil lifting control box adjusts the air pressure of the pneumatic device to drive the induction heating coil to be lifted to a predetermined height along the vertical direction of the welding torch; 4. The plasma welding torch strikes the arc according to the predetermined process parameters, and the touch-screen automatic control platform sends a signal to the robot control cabinet to control the wire feeding device according to The wire is fed at a predetermined wire feeding speed, and at the same time, the dual temperature measurement and control instrument closes the infrared temperature sensor of the front layer metal on the one hand, and controls the infrared temperature sensor to detect the temperature of the tungsten carbide powder core wire in real time. The temperature data of the wire is controlled in real time by the dual induction heating power controller, so that the wire temperature is maintained at the preset temperature; 5. The single-layer additive is completed according to the preset path, and the touch screen automatic control platform passes through the robot control cabinet. Respectively control the wire feeding device to stop wire feeding, send a signal to the dual induction heating controller to turn off the high frequency power supply, control the coil lifting box to adjust the air pressure of the pneumatic device to drive the induction heating coil to descend along the vertical direction of the welding torch and return to its original position, control the dual temperature measurement and control instrument Turn off the infrared temperature sensor that measures the temperature of the wire material; 6. According to the above-mentioned relevant steps, repeat the execution according to the robot arc additive program until the additive of the predetermined size component is completed.

2, a double induction and arc composite heating and additive method for tungsten carbide powder core wire of the present invention includes the following specific steps:

Step 1: After selecting the plasma arc additive process parameters of the tungsten carbide powder core wire 3, the robot control cabinet 15 and the touch screen automatic control platform 18 are started;

Step 2: First, the touch-screen automatic control platform 18 sends a control signal through the robot control cabinet 15 connected to it, and the robot control cabinet 15 simultaneously activates the high-frequency power supply I401 and the high-frequency power supply II6 through the dual induction heating power controller 17, according to the setting The induction heating frequency and heating current of the high-frequency power supply _I are 80~120KHz, the heating current _I1 is 50~160A, the heating frequency f2 of the high-frequency power supply _II is 160~300KHz, and the heating current _I2 is 150～300A. Heat the tungsten carbide powder core wire 3 and the front layer metal 1 respectively; at the same time, the touch screen automatic control platform 18 activates the infrared temperature sensor I10 and the infrared temperature sensor II11 respectively through the dual temperature measurement and control instrument 12 connected to it, and starts to collect the tungsten carbide powder. The temperature information of the core wire 3 and the front layer metal 1, the temperature information is simultaneously sent to the display screen on the touch screen automatic control platform 18 for real-time display;

Step 3: The predetermined heating temperature T ₁ of the tungsten carbide powder core wire 3 set according to the automatic control platform 18 of the touch screen is 300 ℃ ~ 800 ℃ and the predetermined heating temperature T ₂ of the front layer metal is 80 ~ 250 ℃, when the infrared temperature When the sensor I10 detects that the tungsten carbide powder core wire 3 reaches the predetermined heating temperature T1 _of 300°C to 800°C, the touch screen automatic control platform 18 sends a control signal to the high-frequency power supply through the dual-induction heating power controller connected to it. I401, adjust the induced current in real time, so that the temperature of the tungsten carbide powder core wire is maintained at T1 _of 300℃～800℃; at the same time, when the infrared temperature sensor II11 detects that the front layer metal 1 reaches the predetermined heating temperature T2 is 80～ ₂₅₀ ℃ , the dual temperature measurement and control instrument 12 sends a switch signal to the robot control cabinet 15, the robot control cabinet 15 turns off the high-frequency power supply II6 through the dual induction heating power controller 17, stops heating, and then controls the coil lift control box 16 connected to it to adjust the pneumatic device 7 air pressure, the pneumatic device 7 drives the metal heating coil 2 to elevate the predetermined height H ₁ =60mm along the vertical direction of the welding torch through the heat insulating sleeve 9;

Step 4: After the plasma torch 8 ignites the arc according to the predetermined process parameters, the touch-screen automatic control platform 18 sends a signal to the robot control cabinet 15 to control the wire feeding device 5 to feed the arc into the arc and melt the additive according to the predetermined wire feeding speed. The temperature sensor I10 detects the heating temperature of the tungsten carbide powder core wire 3 online in real time, sends the wire temperature measurement data to the touch screen automatic control platform 18 for display, and sends a control signal through the dual induction heating power controller connected to it. To the high-frequency power supply I401, the induced current is adjusted in real time, so that the temperature of the tungsten carbide core wire is maintained at the preset temperature T1 _of 300°C to 800°C. On the other hand, after the arc is ignited, the touch screen automatic control platform 18 sends a signal For the robot control cabinet 15, the measurement of the infrared temperature sensor II11 is turned off by the dual temperature measurement and control instrument 12;

Step 5: According to the set robot program, the single-channel additive is completed. Before the arc is extinguished, the touch-screen automatic control platform 18 sends a signal to the robot control cabinet 15 to control the wire feeding device 5 to stop wire feeding, and then passes through the robot control cabinet 15. Send a control signal to the dual induction heating power controller 17, turn off the high-frequency power supply I401, stop heating the wire, and send a control signal to the coil lift control box 16 to adjust the air pressure of the pneumatic device 7, and the pneumatic device 7 drives the metal heating coil 2 to pass the heat insulation The sleeve 9 descends along the vertical direction of the welding torch and returns to its original position, and the measurement of the infrared temperature sensor I10 is also turned off by the dual temperature measurement and control instrument 12;

Step 6: According to the above relevant steps, the robot arc additive program is repeated until the additive of the predetermined size component is completed.

Example 1

Using the device of the above invention to carry out the addition of tungsten carbide powder core wire with a diameter of 1.6mm and a tungsten carbide content of 10%, the specific steps are as follows:

Step 1: After selecting the plasma arc additive process parameters of the tungsten carbide powder core wire 3, the robot control cabinet 15 and the touch screen automatic control platform 18 are started;

Step 2: First, the touch-screen automatic control platform 18 sends a control signal through the robot control cabinet 15 connected to it, and the robot control cabinet 15 simultaneously activates the high-frequency power supply I401 and the high-frequency power supply II6 through the dual induction heating power controller 17, according to the setting The induction heating frequency of the tungsten carbide powder core wire is f ₁ =90KHz, the induction heating current is I ₁ =80A, the induction heating frequency of the front layer metal is f ₂ =200KHz, and the induction heating current is I ₂ =200A, respectively heating the tungsten carbide powder The core wire 3 and the front layer metal 1; at the same time, the touch screen automatic control platform 18 activates the infrared temperature sensor I10 and the infrared temperature sensor II11 respectively through the dual temperature measurement and control instrument 12 connected to it, and starts to collect the tungsten carbide powder core wire 3 and The temperature information of the front layer metal 1, the temperature information is simultaneously sent to the display screen on the touch screen automatic control platform 18 for real-time display;

Step 3: The predetermined heating temperature T1 of the tungsten carbide powder core wire 3 set according to the touch screen automatic control platform ₁₈ is 700°C and the predetermined heating temperature T2 of the front layer metal is ₂₀₀ °C. When the infrared temperature sensor I10 detects carbonization When the tungsten powder core wire 3 reaches the predetermined heating temperature T1 _of 700°C, the touch screen automatic control platform 18 sends a control signal to the high frequency power supply I401 through the dual induction heating power controller connected to it, and adjusts the induced current in real time, so that the The temperature of the tungsten carbide powder core wire is kept at T ₁ is 700 ° C; at the same time, when the infrared temperature sensor II11 detects that the front layer metal 1 reaches the predetermined heating temperature T ₂ is 200 ° C, the dual temperature measurement and control instrument 12 sends a switch signal to the robot control cabinet. 15. The robot control cabinet 15 turns off the induction high-frequency heating power II6 through the dual induction heating power controller 17, stops heating, and then controls the coil lift control box 16 connected to it to adjust the air pressure of the pneumatic device 7, and the pneumatic device 7 drives the metal heating coil. 2. Elevate H ₁ =60mm along the vertical direction of the welding torch through the heat insulating sleeve 9;

Step 4: After the plasma torch 8 ignites the arc according to the predetermined process parameters, the touch-screen automatic control platform 18 sends a signal to the robot control cabinet 15, and controls the wire feeding device 5 to feed the arc melting increaser at a predetermined wire feeding speed of 0.8 m/min. At the same time, the infrared temperature sensor I10 detects the heating temperature of the tungsten carbide powder core wire 3 online in real time, and sends the wire temperature measurement data to the touch screen automatic control platform 18 for display, and through the dual induction heating power controller connected to it. , send a control signal to the high-frequency power supply I401, adjust the induced current in real time, so that the wire temperature is kept at the preset temperature T1 is 700 ° C, _on the other hand, after the arc is ignited, the touch screen automatic control platform 18 sends a signal to the robot control In the cabinet 15, the measurement of the infrared temperature sensor II11 is turned off by the dual temperature measurement and control instrument 12;

Step 5: According to the set robot program, the single-channel additive is completed. Before the arc is extinguished, the touch-screen automatic control platform 18 sends a signal to the robot control cabinet 15 to control the wire feeding device 5 to stop wire feeding, and then pass the robot control cabinet 15. , send a control signal to the dual induction heating power controller 17, turn off the high-frequency power supply I401, stop heating the wire, and send a control signal to the coil lift control box 16 to adjust the air pressure of the pneumatic device 7, the pneumatic device 7 drives the metal heating coil 2 to pass through The insulation sleeve 9 is lowered along the vertical direction of the welding torch and returns to its original position, and the measurement of the infrared temperature sensor I10 is also turned off by the dual temperature measuring and controlling instrument 12;

Step 6: According to the above relevant steps, the robot arc additive program is repeated until the additive of the predetermined size component is completed.

As a preferred way, the induction heating frequency of the tungsten carbide powder core wire is 90KHz, and the induction heating current is 80A; the induction heating frequency of the front layer metal is 200KHz, and the induction heating current is 200A, and the arc additive uses a plasma arc. , the initial additive current is 160A, the arc travel speed is 18cm/min, the wire feeding speed is 0.8m/min, the ion gas is 1.3L/min, and the protective gas is 18L/min.

As shown in Figure 3, the tungsten carbide powder core wire additive block with tungsten carbide content of 10% has good interlayer bonding, no visible surface defects such as cracks and pores, and the overall shape is good. Figure 4 is a 500-fold photo of the metallographic structure of the additive sample. It can be seen that the matrix of the additive sample is mainly austenite phase, a small amount of ferrite and a small amount of dispersed carbide particles, and the structure is dense and defect-free. .

Example 2

Using the device of the above invention to carry out the addition of tungsten carbide powder core wire with a diameter of 1.6mm and a tungsten carbide content of 20%, the specific steps are as follows:

Step 1: After selecting the plasma arc additive process parameters of the tungsten carbide powder core wire 3, the robot control cabinet 15 and the touch screen automatic control platform 18 are started;

Step 2: First, the touch-screen automatic control platform 18 sends a control signal through the robot control cabinet 15 connected to it, and the robot control cabinet 15 simultaneously activates the high-frequency power supply I401 and the high-frequency power supply II6 through the dual induction heating power controller 17, according to the setting The induction heating frequency f ₁ of the tungsten carbide powder core wire is 100KHz, the induction heating current is 90A for I ₁ , the induction heating frequency f ₂ = 300KHz for the front layer metal, the induction heating current is I ₂ is 250A, respectively heating the tungsten carbide powder core Wire material 3 and front layer metal 1; at the same time, the touch screen automatic control platform 18 activates the infrared temperature sensor I10 and the infrared temperature sensor II11 respectively through the dual temperature measurement and control instrument 12 connected to it, and starts to collect the tungsten carbide powder core wire material 3 and the front layer. The temperature information of the layer metal 1, the temperature information is simultaneously sent to the display screen on the touch screen automatic control platform 18 for real-time display;

Step 3: The predetermined heating temperature T1 of the tungsten carbide powder core wire 3 set according to the touch screen automatic control platform ₁₈ is 800°C and the predetermined heating temperature T2 of the front layer metal is ₂₅₀ °C. When the temperature sensor I10 outside the wire detects the When the tungsten carbide powder core wire 3 reaches the predetermined heating temperature T1 _of 800°C, the touch screen automatic control platform 18 sends a control signal to the high frequency power supply I401 through the dual induction heating power controller connected to it to adjust the induction current in real time. Keep the temperature of the tungsten carbide powder core wire at T ₁ is 800 ° C; at the same time, when the infrared temperature sensor II11 detects that the front layer metal 1 reaches the predetermined heating temperature T ₂ is 250 ° C, the dual temperature measurement and control instrument 12 Send a switch signal to the robot control The cabinet 15 and the robot control cabinet 15 turn off the high-frequency power supply II6 through the dual induction heating power controller 17, stop heating, and then control the coil lift control box 16 connected to it to adjust the air pressure of the pneumatic device 7, and the pneumatic device 7 drives the metal heating coil 2 The predetermined height H ₁ is raised to 60mm along the vertical direction of the welding torch through the heat insulating sleeve 9;

Step 4: After the plasma welding torch 8 ignites the arc according to the predetermined process parameters, the touch screen automatic control platform 18 sends a signal to the robot control cabinet 15, and controls the wire feeding device 5 to feed the arc melting increaser at a predetermined wire feeding speed of 1.0 m/min. At the same time, the infrared temperature sensor I10 detects the heating temperature of the tungsten carbide powder core wire 3 online in real time, and sends the wire temperature measurement data to the touch screen automatic control platform 18 for display, and through the dual induction heating power controller connected to it. , send a control signal to the high-frequency power supply I401, adjust the induced current in real time, so that the wire temperature is kept at the preset temperature T1 is 800 ° C, _on the other hand, after the arc is ignited, the touch screen automatic control platform 18 sends a signal to the robot control In the cabinet 15, the measurement of the infrared temperature sensor II11 is turned off by the dual temperature measurement and control instrument 12;

Step 5: According to the set robot program, the single-channel additive is completed. Before the arc is extinguished, the touch-screen automatic control platform 18 sends a signal to the robot control cabinet 15 to control the wire feeding device 5 to stop wire feeding, and then pass the robot control cabinet 15. , send a control signal to the dual induction heating power controller 17, turn off the high-frequency power supply I401, stop heating the wire, and send a control signal to the coil lift control box 16 to adjust the air pressure of the pneumatic device 7, the pneumatic device 7 drives the metal heating coil 2 to pass through The insulation sleeve 9 is lowered along the vertical direction of the welding torch and returns to its original position, and the measurement of the infrared temperature sensor I10 is also turned off by the dual temperature measuring and controlling instrument 12;

Step 6: According to the above relevant steps, the robot arc additive program is repeated until the additive of the predetermined size component is completed.

As a preferred way, the induction heating frequency of the tungsten carbide powder core wire is 100KHz, the induction heating current is 90A, the induction heating frequency of the front layer metal is 300KHz, and the induction heating current is 250A, and the arc additive uses a plasma arc. , the initial additive current is 170A, the arc travel speed is 20cm/min, and the wire feeding speed is 1.0m/min.

The multi-layer and multi-pass stacked tungsten carbide powder core wire block with tungsten carbide content of 20% shown in Figure 5 has good interlayer bonding, no visible surface defects such as cracks and pores, and the overall shape is good. Figure 6 is a photo of the metallographic structure of the sample, a 500-fold photo of the metallographic structure of the additive sample. The matrix of the additive sample is mainly austenite phase, a small amount of ferrite and a small amount of dispersed carbonization Material particles, dense tissue without defects.

The above descriptions are only preferred embodiments of the present invention, and do not limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. All modifications, substitutions, improvements, etc. made under the principles of the present invention should fall within the protection scope of the present invention.

Claims (8)

1. A tungsten carbide powder core wire dual induction and arc composite heating additive device, characterized in that: comprising a tungsten carbide powder core wire induction heating module, a lift-type induction heating module, a temperature sensing control module, a dual induction heating module Power controller and touch screen automatic control platform; The tungsten carbide powder core wire induction heating module includes a high frequency power supply I (401), an insulating ceramic tube (402), a wire induction coil (403), a heat shield (404), a protective shell (405), and a high frequency power supply I (401) High-frequency current is supplied to the wire induction coil (403), the high-frequency induction heats the tungsten carbide powder core wire (3) passing through the insulating ceramic tube (402), the start and stop of which are sent via the robot control cabinet (15) The signal is controlled by the dual induction heating power controller (17); The lifting induction heating module includes a high frequency power supply II (6), a metal induction heating coil (2), a pneumatic device (7) and a coil lifting control box (16). The high frequency power supply II (6) supplies the metal induction heating coil (2). ) provides high-frequency current to heat the front layer metal (1) through high-frequency induction, and its start and stop send signals to the dual induction heating power controller (17) through the robot control cabinet (15) for control; the metal induction heating coil (2) The lifting of ) is controlled by sending a signal to the coil lifting control box (16) through the robot control cabinet (15), and then adjusting the air pressure control through the pneumatic device (7); The temperature sensing control module consists of an infrared temperature sensor I (10), an infrared temperature sensor II (11) and a dual temperature measurement and control instrument (12). The dual temperature measurement and control instrument (12) simultaneously detects the tungsten carbide powder core wire near the arc position. (3) and the temperature of the front metal (1); The touch-screen automatic control platform (18) displays the temperature information of the tungsten carbide powder core wire (3) and the front layer metal (1) measured by the dual temperature measurement and control instrument (12), the high-frequency power supply I (401) and the high-frequency power supply II (6) status and the lifting status information of the metal induction coil (2). 2. A tungsten carbide powder core wire dual induction and arc composite heating additive device according to claim 1, characterized in that: infrared temperature sensor I (10), infrared temperature sensor II (11) and plasma welding torch ( 8) Coaxially placed and fixed together on the mechanical bracket (13) connected to the end of the robot (14), the infrared temperature sensor I (10) and the plasma torch (8) are placed coaxially and parallel, and the infrared temperature sensor II (11) is parallel to the The included angle in the vertical direction of the welding torch ranges from 30° to 60°, which is achieved by joint adjustment. 3. A tungsten carbide powder core wire dual induction and arc composite heating additive device according to claim 2, characterized in that: the fixed end of the metal induction heating coil (2) is connected to the pneumatic device (7), and the metal induction heating coil (2) is connected to the pneumatic device (7). The induction heating coil (2) passes through the mechanical support (13) through the heat insulating sleeve (9), and the pneumatic device drives the metal induction heating coil (2) to lift and descend. The diameter of the heat insulating sleeve (9) is 10~30mm. The inner wall is coated with a layer of thermal insulation and anti-skid coating. 4. A method for manufacturing a tungsten carbide powder core wire dual-induction and arc composite heating additive device based on any one of claims 1-3, wherein the implementation process comprises the following steps: Step 1: After selecting the plasma arc additive process parameters of the tungsten carbide powder core wire (3), the robot control cabinet (15) and the touch screen automatic control platform (18) start to start; Step 2: First, the touch-screen automatic control platform (18) sends a control signal through the robot control cabinet (15) connected to it, and the robot control cabinet (15) simultaneously starts the high-frequency power supply I ( 401) and high-frequency power supply II (6), respectively heat the tungsten carbide powder core wire (3) and the front layer metal (1) according to the set induction heating frequency and heating current; at the same time, the platform (18) is automatically controlled by the touch screen The infrared temperature sensor I (10) and the infrared temperature sensor II (11) are activated respectively by the dual temperature measuring and controlling instrument (12) connected to it, and the temperature of the tungsten carbide powder core wire (3) and the front layer metal (1) is started to be collected. information and temperature information are simultaneously sent to the display screen on the touch screen automatic control platform (18) for real-time display; Step 3: According to the predetermined heating temperature T1 of the tungsten carbide powder core wire (3) and the predetermined heating temperature T2 _of the front layer metal set by the touch screen automatic control platform ( ₁₈ ), when the infrared temperature sensor I (10) detects that When the tungsten carbide powder core wire ( ₃ ) reaches the predetermined heating temperature T1, the touch screen automatic control platform (18) sends a control signal to the high-frequency power supply I (401) through the dual-induction heating power controller (17) connected to it. ), adjust the induced current in real time to keep the temperature of the tungsten carbide powder core wire at T ₁ ; at the same time, when the infrared temperature sensor II (11) detects that the front layer metal (1) reaches the predetermined heating temperature T ₂ , the dual temperature measurement and control instrument ( 12) Send a switch signal to the robot control cabinet (15), the robot control cabinet (15) turns off the high-frequency power supply II (6) through the dual induction heating power controller (17), stops heating, and then controls the coil connected to it to lift the control The box (16) adjusts the air pressure of the pneumatic device (7), and the pneumatic device (7) drives the metal heating coil (2) to elevate the predetermined height H ₁ along the vertical direction of the welding torch through the insulating sleeve (9); Step 4: After the plasma torch (8) ignites the arc according to the predetermined process parameters, the touch screen automatic control platform (18) sends a signal to the robot control cabinet (15) to control the wire feeding device (5) to feed the wire according to the predetermined wire feeding speed. At the same time, the infrared temperature sensor I (10) detects the heating temperature of the tungsten carbide powder core wire (3) in real time, and sends the wire temperature measurement data to the touch screen automatic control platform (18) for display, and Through the dual induction heating power controller connected to it, a control signal is sent to the high-frequency power supply I (401), and the induced current is adjusted in real time, so that the temperature of the wire is kept at the preset temperature T ₁ . On the other hand, after the arc is ignited, The touch screen automatic control platform (18) sends a signal to the robot control cabinet (15), and the measurement of the infrared temperature sensor II (11) is turned off by the dual temperature measurement and control instrument (12); Step 5: According to the set robot program, the single-channel additive is completed. Before the arc is extinguished, the touch-screen automatic control platform (18) sends a signal to the robot control cabinet (15) to control the wire feeding device (5) to stop wire feeding, and then Through the robot control cabinet (15), send a control signal to the dual induction heating power controller (17), turn off the high frequency power supply I (401), stop heating the wire, and send a control signal to the coil lift control box (16) to adjust the pneumatic The air pressure of the device (7), the pneumatic device (7) drives the metal heating coil (2) to descend along the vertical direction of the welding torch through the insulating sleeve (9) to return to the original position, and the infrared temperature sensor is also turned off by the dual temperature measuring and controlling instrument (12). Measurement of I(10); Step 6: According to the above relevant steps, the robot arc additive program is repeated until the additive of the predetermined size component is completed. 5. The method for manufacturing a tungsten carbide powder core wire double induction and arc composite heating additive device according to claim 4, characterized in that: an induction coil is used to preheat the tungsten carbide powder core wire material at high frequency in advance Combined heating mode of plasma arc and induction heating to simultaneously melt tungsten carbide powder core wire with front layer metal. 6. The method for manufacturing a tungsten carbide powder core wire double induction and arc composite heating additive device according to claim 4, characterized in that: the tungsten carbide powder core wire and the front layer metal are heated by high frequency double induction Method, the system is simultaneously inductive heating and infrared temperature sensor measurement, the heating temperature T1 _of the tungsten carbide powder core wire is 300~800℃, and the preheating temperature T2 of the front layer metal is 80~ ₂₅₀ ℃. 7. The method for manufacturing a tungsten carbide powder core wire double induction and arc composite heating additive device according to claim 4, wherein the lifting induction heating module is driven by a pneumatic device to lift the metal induction coil, and the coil is lifted. _The height H1 is 40~80mm. 8. the manufacture method of a kind of tungsten carbide powder core wire double induction and arc composite heating additive device according to claim 4, it is characterized in that: the heating frequency f of high frequency power supply _I is 80～120KHz, heating current I ₁ is 50~160A, the heating frequency f ₂ of the high frequency power supply II is 160~300KHz, and the heating current I ₂ is 150~300A.

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