Vacuum diffusion welding device

Abstract

The utility model discloses a vacuum diffusion welding device, which relates to the technical field of vacuum welding, and comprises an electric control mechanism, a pressure generating mechanism and a vacuumizing device, the electric control mechanism comprises a solid-state relay, a motor driver and a power supply, and the solid-state relay is arranged above the motor driver. By adopting the furnace body self-heating structure, an external heat source is not needed for heating, the heating device is simplified, the equipment cost is reduced, the temperature of a welding part can be detected in real time through the temperature sensor, the welding temperature is accurately controlled, and the welding yield is increased; and the welding pressure can be monitored and adjusted in real time through the servo motor and the pressure sensor, so that the precision welding requirement is met.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum welding, in particular to a vacuum diffusion welding device. Background Technique

[0002] As one of the common laboratory equipment in the field of polymer materials, the differential scanning calorimeter (DSC) plays a crucial role in the entire calorimeter family. All thermodynamic indicators related to the phase change of substances, including but not limited to "four states and five temperatures of polymer polymers", such as glass transition temperature, melting point, crystallinity, crystallization rate, etc., can be analyzed using DSC. It is widely used in various fields such as plastics, rubber, fibers, coatings, adhesives, pharmaceuticals, foods, biological organisms, inorganic materials, metal materials, and composite materials.

[0003] In the prior art, a patent with the application number CN2017205910939 discloses a "vacuum diffusion welding device", which includes a main body, a vacuum pumping device for pumping the main body, and a cooling device for cooling the main body. The main body includes a box body and a driving cylinder arranged above the box body. A workbench and heating molybdenum strips are arranged inside the box body. The cooling device includes a water pump and a water tank connected by a pipeline. This vacuum diffusion welding device is a three-stage vacuum pumping device, which has a good vacuum pumping effect and a good cooling effect.

[0004] Existing conventional diffusion welding devices need to separately introduce heat sources such as induction heat sources and heating rods, which increases the equipment procurement cost. Moreover, conventional diffusion welding equipment cannot detect the temperature of the welding surface in real time, cannot perform precise temperature control, and there is also a problem that conventional diffusion welding equipment usually sets a fixed pressure value and cannot be adjusted. In view of the above problems, a vacuum diffusion welding device is proposed. Content of the Utility Model

[0005] The purpose of the utility model is to provide a vacuum diffusion welding device to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A vacuum diffusion welding device includes an electric control mechanism, a pressure generating mechanism, and a vacuum pumping device. The electric control mechanism includes a solid-state relay, a motor driver, and a power supply. The solid-state relay is arranged above the motor driver, and the power supply is arranged on the side of the motor driver. The pressure generating mechanism includes a servo push rod motor module and a ceramic partition. A ceramic outer enclosure is provided at the bottom of the ceramic partition. A bottom plate is provided at the bottom of the ceramic outer enclosure. A plurality of guide columns are evenly distributed on the top of the bottom plate, and the guide columns all penetrate through the inner side of the ceramic partition. A tension and compression sensor is provided on the top of the ceramic partition. A heating furnace body is provided inside the ceramic outer enclosure. A furnace body heating wire is connected to the side of the heating furnace body, and the furnace body heating wire penetrates through the inner side of the ceramic partition. A thermocouple wire is provided inside the heating furnace body, and a sensor body is provided at the bottom of the thermocouple wire. The bottom of the servo push rod motor module is connected to a push rod, and a corrugated pipe is provided on the top of the tension and compression sensor. The corrugated pipe is sleeved on the outside of the push rod.

[0008] The furnace body heating wire is connected to the solid-state relay and the power supply for heating the heating furnace body. The thermocouple is used for temperature measurement during sensor and furnace body welding. The software part uses the PID control algorithm and PWM control to perform preset temperature control on the furnace body heating wire. The relationship between the servo motor stroke and the preset pressure (actually, the pressure should be divided by the welding area) is established using the PID control algorithm to ensure that the pressure meets the welding requirements. A pressure sensor is used to monitor the vacuum in the barrel in real time. After reaching the preset vacuum degree, the solenoid valve is disconnected and the vacuum pump stops working. By setting up a servo push rod motor module, a push rod, and a bracket, cooperating with an adapter block and a tension and compression sensor and using an embedded connection, and at the same time, the pressure signal is connected to the main control circuit board to provide the function of real-time pressure reading. By setting up a pressure-bearing barrel body, a sealing ring is used between the pressure-bearing barrel body and the barrel cover for sealing. An external joint is provided on the side of the pressure-bearing barrel body and connected to the solenoid valve, which is convenient for controlling vacuum extraction. The corrugated pipe is welded to the barrel cover and the adapter block to ensure vacuum and can be stretched to a certain extent. The heating furnace body uses the self-heating method of winding the furnace body heating wire with silver furnace to heat. The ceramic partition and the ceramic outer enclosure made of ceramic material are used, cooperating with four guide columns and the bottom plate to provide a high-efficiency self-heating function. The servo push rod motor module cooperates with the push rod to achieve the pushing effect.

[0009] Preferably, a bracket is provided at the bottom of the servo push rod motor module, and the bracket is arranged on the outside of the push rod. The bracket provides the function of erection and support.

[0010] Preferably, a pressure-bearing barrel body is provided on the outside of the ceramic partition, and a sealing ring is provided on the top of the pressure-bearing barrel body. The pressure-bearing barrel body provides the role of heating assistance, and at the same time, cooperating with the sealing ring provides a sealing effect, ensuring the heating effect.

[0011] Preferably, an external joint is connected to one side of the pressure-bearing barrel body, and a solenoid valve is connected to one end of the external joint. The external joint facilitates the connection with the solenoid valve for efficient vacuum extraction.

[0012] Preferably, two installation openings are formed through the other side of the pressure-bearing barrel body, and vacuum electrodes are arranged inside the installation openings. The installation openings facilitate the installation and support of the vacuum electrodes, thereby improving the installation stability. Two pairs of a total of sixteen vacuum electrodes are used to connect temperature and pressure signals to the main control circuit board, and at the same time, it is convenient for the connection of the heating wire to the solid-state relay, which is beneficial to realizing the function of signal transmission, and through the sealing ring and the overall sealing, the function of effective sealing to ensure stable operation is realized.

[0013] Preferably, the electric control mechanism further includes a housing, an inner mounting plate and a main control circuit board are arranged inside the housing, and a touch screen is arranged on the side of the main control circuit board. The housing provides external protection, and the inner mounting plate provides effective internal mounting. Connecting the main control circuit board to the touch screen facilitates the provision of a convenient control function.

[0014] Preferably, a bottom support plate is fixedly installed at the bottom of the housing, and the solid-state relay, the motor driver and the power supply are all arranged on the side of the main control circuit board. The bottom plate facilitates the function of providing protection at the bottom and ensures the safety of use.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] 1. By adopting the self-heating structure of the furnace body, the present utility model does not require an external heat source for heating, simplifies the heating device, and reduces the equipment cost.

[0017] 2. The temperature of the welded parts can be detected in real time by the self-provided temperature sensor of the present utility model, and the welding temperature can be accurately controlled to improve the welding yield.

[0018] 3. The pressure during welding can be monitored and adjusted in real time by the servo motor and the pressure sensor of the present utility model to meet the requirements of precision welding (small stress and small deformation). Since the yield strengths at different temperature points of the materials are different, an algorithm that fits temperature and yield strength is used to construct a smooth relationship curve, and the pressure is precisely controlled at any temperature during the welding process through the PID control algorithm to ensure the welding effect and the minimum deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a perspective view of a vacuum diffusion welding device of the present utility model;

[0020] Figure 2 is a schematic structural diagram of another angle of a vacuum diffusion welding device of the present utility model;

[0021] Figure 3 This is a schematic diagram of the decomposition structure of the electric control mechanism of a vacuum diffusion welding device of the present utility model;

[0022] Figure 4 This is a schematic diagram of the decomposition structure of the pressure generating mechanism of a vacuum diffusion welding device of the present utility model;

[0023] Figure 5 This is a schematic diagram of a partial structure of the pressure generating mechanism of a vacuum diffusion welding device of the present utility model;

[0024] Figure 6 This is a schematic diagram of a local structure of the pressure generating mechanism of a vacuum diffusion welding device of the present utility model;

[0025] Figure 7 This is a schematic diagram of the structure of another angle of the pressure generating mechanism of a vacuum diffusion welding device of the present utility model.

[0026] In the figure: 100, electric control mechanism; 101, outer shell; 102, inner mounting plate; 103, solid state relay; 104, motor driver; 105, power supply; 106, main control circuit board; 107, touch screen; 108, bottom support plate; 200, pressure generating mechanism; 201, servo push rod motor module; 202, push rod; 203, bracket; 204, ceramic partition; 2041, ceramic outer enclosure; 2042, bottom plate; 2043, guide post; 205, bellows; 2051, tension and compression sensor; 206, heating furnace body; 2061, furnace body heating wire; 2062, thermocouple wire; 2063, sensor body; 207, pressure bearing barrel body; 2071, sealing ring; 2072, outer joint; 2073, solenoid valve; 2074, installation port; 2075, vacuum electrode; 300, vacuum pumping equipment. Specific embodiments

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0028] Embodiment 1: Refer to Figures 1-7 As shown: A vacuum diffusion welding device includes an electric control mechanism 100, a pressure generating mechanism 200, and a vacuum pumping equipment 300.

[0029] The electric control mechanism 100 includes a solid-state relay 103, a motor driver 104, and a power supply 105. The solid-state relay 103 is arranged above the motor driver 104, and the power supply 105 is arranged on the side of the motor driver 104. The furnace body heating wire 2061 is connected to the solid-state relay 103 and the power supply 105 for heating the heating furnace body 206. A thermocouple is used for temperature measurement during sensor and furnace body welding. Among them, the software part uses the PID control algorithm and PWM control to perform preset temperature control on the furnace body heating wire; the PID control algorithm is used to establish the relationship between the servo motor stroke and the preset pressure (the actual pressure to be controlled should be divided by the welding area) to ensure that the pressure meets the welding requirements; a pressure sensor is used to monitor the vacuum in the barrel in real time, and after reaching the preset vacuum degree, the solenoid valve is disconnected and the vacuum pump stops working.

[0030] The pressure generating mechanism 200 includes a servo push rod motor module 201 and a ceramic partition 204. A ceramic outer enclosure 2041 is arranged at the bottom of the ceramic partition 204, a bottom plate 2042 is arranged at the bottom of the ceramic outer enclosure 2041, and a plurality of guide posts 2043 are evenly distributed on the top of the bottom plate 2042. The guide posts 2043 all penetrate through the inside of the ceramic partition 204. A tension and compression sensor 2051 is arranged at the top of the ceramic partition 204, and a heating furnace body 206 is arranged inside the ceramic outer enclosure 2041. A furnace body heating wire 2061 is connected to the side of the heating furnace body 206. The furnace body heating wire 2061 penetrates through the inside of the ceramic partition 204. A thermocouple wire 2062 is arranged inside the heating furnace body 206, and a sensor body 2063 is arranged at the bottom of the thermocouple wire 2062. The bottom of the servo push rod motor module 201 is connected to a push rod 202, and a bracket 203 is arranged at the bottom of the servo push rod motor module 201. The bracket 203 is arranged outside the push rod 202. The bracket 203 provides the function of erection and support, and the servo push rod motor module 201 cooperates with the push rod 202 to achieve the pushing effect. A bellows 205 is arranged at the top of the tension and compression sensor 2051, and the bellows 205 is sleeved outside the push rod 202. The bellows 205 facilitates the provision of a connection function and improves the convenience of use.

[0031] By setting up a servo push rod motor module 201, a push rod 202 and a bracket 203, cooperating with an adapter block and a tension and compression sensor 2051 and adopting an embedded connection, and at the same time connecting the pressure signal to the main control circuit board 106 to provide the function of real-time pressure reading. By setting up a pressure-bearing barrel body 207 and using a sealing ring 2071 to seal between the pressure-bearing barrel body 207 and the barrel cover, an external joint 2072 is provided on the side of the pressure-bearing barrel body 207 and connected to an electromagnetic valve 2073, which is convenient for controlling vacuum extraction. The bellows 205 and the barrel cover and the adapter block are connected by welding to ensure vacuum and can be stretched to a certain extent. The heating furnace body 206 is heated by the self-heating method of winding a furnace heating wire 2061 with silver. A ceramic partition plate 204 and a ceramic outer enclosure 2041 made of ceramic material are adopted and cooperate with four guide posts 2043 and a bottom plate 2042 to provide a high-efficiency self-heating function.

[0032] As Figure 4 shown, an external pressure-bearing barrel body 207 is provided on the outside of the ceramic partition plate 204, and a sealing ring 2071 is provided on the top of the pressure-bearing barrel body 207. The pressure-bearing barrel body 207 provides the role of heating assistance, and at the same time, in cooperation with the sealing ring 2071, it provides a sealing effect, ensuring the heating effect.

[0033] As Figure 4 shown, an external joint 2072 is connected to one side of the pressure-bearing barrel body 207, and an electromagnetic valve 2073 is connected to one end of the external joint 2072. Through the external joint 2072, it is convenient to connect with the electromagnetic valve 2073 to facilitate the efficient vacuum extraction function.

[0034] As Figure 4 shown, two installation openings 2074 are penetrated on the other side of the pressure-bearing barrel body 207, and a vacuum electrode 2075 is provided inside the installation openings 2074. Through the installation openings 2074, it is convenient to install and support the vacuum electrode 2075, thereby improving the installation stability. Two pairs of a total of sixteen vacuum electrodes 2075 are used to connect temperature and pressure signals to the main control circuit board 106, and at the same time, it is convenient to connect the heating wire to the solid-state relay 103, which is beneficial to realizing the function of signal transmission, and through the sealing ring and the overall body sealing, the effective sealing is realized to ensure the stable operation.

[0035] As Figure 3 shown, the electric control mechanism 100 further includes a housing 101. An inner mounting plate 102 and a main control circuit board 106 are provided inside the housing 101, and a touch screen 107 is provided on the side of the main control circuit board 106. The housing 101 provides external protection, and the inner mounting plate 102 provides an effective inner mounting function. By connecting the main control circuit board 106 to the touch screen 107, it is convenient to provide a convenient control function.

[0036] As Figure 3As shown, a bottom support plate 108 is fixedly installed at the bottom of the outer shell 101. The solid-state relay 103, the motor driver 104, and the power supply 105 are all arranged on the side of the main control circuit board 106. The bottom plate facilitates the function of providing protection at the bottom and ensures the safety of use.

[0037] In the present utility model, when the vacuum diffusion welding device is in use, first, the sensor body 2063 and the heating furnace body 206 are placed into the ceramic outer enclosure 2041. The thermocouple wire 2062 on the sensor body 2063 and the furnace heating wire 2061 pass through the holes of the ceramic partition 204 and are connected to the two vacuum electrodes 2075. The tensile and compressive force sensor 2051 is connected to the vacuum electrode 2075. The barrel cover is covered on the pressure-bearing barrel body 207 and locked with screws. The welding temperature, pressure, time, and vacuum degree are input through the touch screen 107. Subsequently, the solenoid valve 2073 is opened, and the vacuum pumping device 300 operates to pump the air in the barrel. After reaching the target value, the solenoid valve 2073 and the vacuum pumping device 300 are closed. Subsequently, the furnace heating wire 2061 on the heating furnace body 206 starts to operate, and the thermocouple wire 2062 monitors the temperature in real time. At the same time, the servo push rod motor module 201 starts to operate and applies a downward force. The tensile and compressive force sensor 2051 detects and feeds back the pressure in real time to ensure the stability of the pressure. When the specified temperature and pressure are reached, the furnace heating wire 2061 maintains a stable temperature, and the servo push rod motor module 201 ensures the stability of the pressure. When the preset time is reached, the furnace heating wire 2061 stops operating, and the servo push rod motor module 201 moves upward until the pressure is zero. After the temperature drops to room temperature, the solenoid valve 2073 is opened. After introducing air, the barrel cover is opened, and the heating furnace body 206 and the sensor body 2063 are taken out.

[0038] Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A vacuum diffusion welding device, characterized in that: It includes an electric control mechanism (100), a pressure generating mechanism (200) and a vacuum pumping device (300). The electric control mechanism (100) includes a solid state relay (103), a motor driver (104) and a power supply (105). The solid state relay (103) is arranged above the motor driver (104), and the power supply (105) is arranged on the side of the motor driver (104). The pressure generating mechanism (200) includes a servo push rod motor module (201) and a ceramic partition (204). A ceramic outer enclosure (2041) is arranged at the bottom of the ceramic partition (204). A bottom plate (2042) is arranged at the bottom of the ceramic outer enclosure (2041). A plurality of guide posts (2043) are evenly distributed on the top of the bottom plate (2042). The guide posts (2043) all penetrate through the inside of the ceramic partition (204). A tensile and compressive force sensor (2051) is arranged on the top of the ceramic partition (204). A heating furnace body (206) is arranged inside the ceramic outer enclosure (2041). A furnace body heating wire (2061) is connected to the side of the heating furnace body (206). The furnace body heating wire (2061) penetrates through the inside of the ceramic partition (204). A thermocouple wire (2062) is arranged inside the heating furnace body (206). A sensor body (2063) is arranged at the bottom of the thermocouple wire (2062). A push rod (202) is connected to the bottom of the servo push rod motor module (201). A bellows (205) is arranged on the top of the tensile and compressive force sensor (2051). The bellows (205) is sleeved on the outside of the push rod (202).

2. The vacuum diffusion welding device according to claim 1, wherein: A bracket (203) is arranged at the bottom of the servo push rod motor module (201). The bracket (203) is arranged on the outside of the push rod (202).

3. A vacuum diffusion welding device according to claim 1, characterized in that: A pressure bearing barrel body (207) is arranged outside the ceramic partition (204). A sealing ring (2071) is arranged at the top of the pressure bearing barrel body (207).

4. The vacuum diffusion welding device according to claim 3, wherein: An external joint (2072) is connected to one side of the pressure bearing barrel body (207). One end of the external joint (2072) is connected to a solenoid valve (2073).

5. The vacuum diffusion welding device according to claim 4, wherein: Two installation openings (2074) are formed through the other side of the pressure bearing barrel body (207). A vacuum electrode (2075) is arranged inside the installation openings (2074).

6. A vacuum diffusion welding device according to any one of claims 1 to 5, characterized in that: The electric control mechanism (100) further includes a housing (101). An inner mounting plate (102) and a main control circuit board (106) for arranging the solid state relay (103), the motor driver (104) and the power supply (105) are arranged inside the housing (101). A touch screen (107) is arranged on the side of the main control circuit board (106).

7. A vacuum diffusion welding device according to claim 6, characterized in that: A bottom support plate (108) is fixedly installed at the bottom of the housing (101). The solid state relay (103), the motor driver (104) and the power supply (105) are all arranged on the side of the main control circuit board (106).

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