A high-frequency pulse hot-press welding power supply

Abstract

The present invention discloses a high-frequency pulse hot-press welding power supply, which belongs to the technical field of hot-press welding. The power supply comprises a box, a heat dissipation component arranged in the box, a displacement component connected to the heat dissipation component, and a first heat dissipation fan connected to the box. The present invention improves the heat dissipation efficiency of components with large heat generation, and the number of heat dissipation fans and ventilation holes is small while ensuring the heat dissipation effect; provides a good temperature environment for realizing the stable operation of 20kHz high-frequency pulse circuits and related components, ensures the normal operation of high-frequency power supply, cools down transformers, inverters or other important components in the power supply box, so as to realize low-noise heating and high-precision temperature control, and improves the welding quality of hot-press welding machines.

Description

Technical Field

[0001] The invention belongs to the technical field of hot pressing welding, and in particular relates to a high-frequency pulse hot pressing welding power source. Background Art

[0002] Hot press welding machine is a device that connects two parts by heating and pressure. It is widely used in electronics, automobiles, aerospace and other fields due to its advantages such as fast welding speed, high connection strength and wide application range. The power supply of high-frequency pulse hot press welding machine adopts AC-DC-AC-DC conversion technology, and realizes 20kHz high-frequency pulse through high-frequency inversion and rectification control. The input electric energy is regulated by high-frequency inversion, voltage conversion and synchronous rectification regulation, and provides welding power for hot press welding head. The time control reaches millisecond-level accuracy, and the control response speed and control accuracy are greatly improved; DC output significantly improves welding processability, but when this high-frequency pulse hot press welding machine is used for a long time, the components in the power box generate a lot of heat. After long-term use, the temperature in the power box is too high. In the operation process of high-frequency power supply, the temperature control of related components is very important. If the temperature of the components is too high, it will not only affect the normal operation of the power supply, but also may cause damage to the components and even cause safety accidents. The existing cooling method is usually to set a cooling fan in the power box. If the cooling effect is not up to standard, more cooling fans and ventilation holes are set. However, too many fans and ventilation holes can easily bring external dust into the box, which is not conducive to the normal use of the power supply. Summary of the invention

[0003] In view of the above problems existing in the prior art, the technical problem to be solved by the present invention is to provide a high-frequency pulse hot pressure welding power supply to ensure the heat dissipation effect in the power box.

[0004] Technical solution: In order to solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0005] A high-frequency pulse hot-press welding power source comprises a box, a heat dissipation component arranged in the box, a displacement component connected to the heat dissipation component and a first heat dissipation fan connected to the box, the heat dissipation component comprises a heat-conducting rod and a first heat dissipation fin and a second heat dissipation fin arranged on the heat-conducting rod, the displacement component is used to drive the heat dissipation component to move so that the heat dissipation component switches between a first position and a second position, wherein in the first position, the first heat dissipation fin is located in the box, and in the second position, the first heat dissipation fin is located outside the box.

[0006] Preferably, the heat-conducting rod is a heat pipe, and the heat-conducting rod includes an evaporation section and a condensation section. The first heat-dissipating fins are connected to the condensation section, and the second heat-dissipating fins are connected to the evaporation section.

[0007] Preferably, a second cooling fan corresponding to the first cooling fins is connected outside the box, and when the cooling assembly is in the second position, the airflow generated by the second cooling fan passes through the first cooling fins.

[0008] Preferably, the displacement assembly includes a displacement seat, a drive motor connected to the displacement seat, a lead screw connected to the drive motor, and a slider movably connected to the lead screw, and the slider is connected to the heat dissipation assembly.

[0009] Preferably, the displacement assembly drives the heat dissipation assembly to move up and down, and the second heat dissipation fan is connected to the outer top wall of the box body.

[0010] Preferably, a first ventilation hole is provided at a position corresponding to the first heat dissipation fin on the side wall of the box.

[0011] Preferably, a first heat-conducting block is provided in the box body, and a second heat-conducting block is provided on the second heat-dissipating fins; when the heat-dissipating assembly is in the second position, the second heat-conducting block contacts the first heat-conducting block.

[0012] Preferably, the first heat conducting block is provided with a first slope surface, and the second heat conducting block is provided with a second slope surface corresponding to the first slope surface.

[0013] Preferably, a first frosted layer is provided on the first slope surface, and a second frosted layer corresponding to the first frosted layer is provided on the second slope surface.

[0014] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0015] 1. By setting a heat dissipation component and a displacement component, the displacement component can drive the heat dissipation component to change its position. The first heat dissipation fin of the heat dissipation component can be located inside or outside the box according to work needs. When the first heat dissipation fin is located inside the box, it is suitable for short-term work. When the first heat dissipation fin is located outside the box, it reduces the heat accumulation in the box. The second heat dissipation fan improves the heat dissipation effect of the first heat dissipation fin and facilitates the cleaning of the first heat dissipation fin, thereby ensuring the heat exchange effect and reducing the dust in the chassis;

[0016] 2. The first heat dissipation fins can be arranged horizontally or vertically, and the corresponding second heat dissipation fan can be adjusted to adapt to different use environments of the box;

[0017] 3. The heat dissipation assembly includes a heat conducting rod, a first heat dissipation fin and a second heat dissipation fin. The heat conducting rod adopts a heat pipe, which has a good heat transfer effect;

[0018] 4. Two heat-conducting blocks are set up to transfer heat from components with large heat generation through the heat-conducting blocks. The frosted layer on the heat-conducting blocks has a good heat transfer effect. The heat is transferred to the condensation section of the heat-conducting rod of the heat-dissipating component to improve the heat dissipation efficiency of components with large heat generation;

[0019] 5. The first cooling fan is located in the box body, and the second cooling fan is located outside the box body. The airflow of the second cooling fan does not enter the box body. While ensuring the heat dissipation effect, the number of cooling fans and ventilation holes is small, which reduces the dust from entering the box body and ensures the normal operation of the power box. The first ventilation hole corresponds to the position of the first cooling fin. Most of the dust brought by the entering air adheres to the first cooling fin. After the first cooling fin moves upward, it is also convenient to clean the surface dust.

[0020] 6. To provide a good temperature environment for the stable operation of 20kHz high-frequency pulse circuits and related components, cool down the transformer, inverter or other important components in the power box to ensure the normal operation of the high-frequency power supply, so as to achieve low-noise heating and high-precision temperature control and improve the welding quality of the hot press welding machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the internal structure of the box body according to Embodiment 1 of the present invention;

[0022] Figure 2 is a schematic diagram of the external structure of the box body of Example 1;

[0023] Figure 3 It is a schematic diagram of the structure of the heat dissipation component and the displacement component;

[0024] Figure 4 This is the working principle diagram of the heat pipe of the heat conducting rod;

[0025] Figure 5 is a schematic structural diagram of the heat dissipation assembly of Example 1 in the second position;

[0026] Figure 6 It is a structural schematic diagram of Example 2. DETAILED DESCRIPTION

[0027] The present invention is further illustrated below in conjunction with specific examples. The examples are implemented based on the technical solutions of the present invention. It should be understood that these examples are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0028] Example 1

[0029] like Figure 1 and Figure 2As shown, a high-frequency pulse hot pressure welding power supply includes a box body 1, a heat dissipation component 2, a displacement component 3, a first heat dissipation fan 4 and a second heat dissipation fan 5. The box body 1 is a rectangular body, and a display 91 is provided on the panel of the box body 1. A plurality of sockets 92 are connected to the back panel of the box body 1 for connecting to an existing hot pressure welding gun and an external power supply, such as a power cord interface, a temperature sensor interface, a USB interface, a communication interface, etc. The box 1 is provided with existing components such as a transformer, a single-chip microcomputer, an inverter, and a power tube. The single-chip microcomputer (such as an STM32 single-chip microcomputer) controls the working state of the inverter (such as an inverter composed of IGBT) and the power tube, so that the input electric energy is subjected to high-frequency inversion regulation, voltage conversion and synchronous rectification processing, so as to provide the required welding electric energy for the hot pressing welding gun. During operation, due to the realization of 20kHz high-frequency pulse, there is no noise when heating up. A thermocouple temperature sensor is arranged at the welding nozzle of the hot pressing welding gun, and the temperature sensor is connected to the single-chip microcomputer, and samples at a temperature sampling speed of 0.25ms each time and feeds back to the single-chip microcomputer. The single-chip microcomputer adjusts the current output to the pressure head of the hot pressing welding gun by PWM control according to the temperature sampling data, so as to accurately control the pressure head temperature within the set range, thereby achieving a temperature control accuracy of ±2°C, and the temperature rise speed is fast, and the temperature can rise to 300°C in 1 second.

[0030] like Figure 1 and Figure 3 As shown, the heat dissipation component 2 and the displacement component 3 are both arranged in the box body 1, the heat dissipation component 2 is arranged on one side of the upper part of the box body, the displacement component 3 is connected to the heat dissipation component 2 and drives the heat dissipation component 2 to move up and down, the displacement component 3 includes a displacement seat 31, a drive motor 32, a lead screw 33 and a slider 34, the upper end of the displacement seat 31 is connected to the top wall inside the box body 1, the drive motor 32 is connected to the lower end of the displacement seat 31, the lead screw 33 is movably connected to the displacement seat 31 and the lower end of the lead screw 33 is connected to the drive motor 32, the slider 34 is movably connected to the lead screw 33, when the drive motor 32 is working, it drives the lead screw 33 to rotate, thereby driving the slider 34 to move up and down, the slider 34 is connected to the heat dissipation component 2, and when the slider 34 moves up and down, it drives the heat dissipation component 2 to move up and down.

[0031] like Figure 1 , Figure 2 , Figure 3 and Figure 5As shown, the heat dissipation assembly 2 includes a heat-conducting rod 21, a first heat dissipation fin 22, a second heat dissipation fin 23 and a separator 24. A plurality of heat-conducting rods 21 are provided and arranged vertically. The middle of the outer walls of the plurality of heat-conducting rods 21 are connected by a separator 24. The heat-conducting rod 21 adopts an existing heat pipe. The heat-conducting rod 21 includes an evaporation section 211 at the bottom and a condensation section 212 at the top. The heat-conducting rod 21 is hollow and has a liquid wick on the inner wall. The hollow part of the heat-conducting rod 21 stores a working medium. When the evaporation section 211 is heated, the working medium in the rod body is heated and evaporates and takes away the heat. The evaporated gas goes upward and condenses into liquid in the condensation section 212 while releasing latent heat. The cold The condensed liquid flows back to the evaporation section 211 under the capillary force and gravity of the liquid wick, completing the cycle, thereby transferring heat from the evaporation section 211 to the condensation section 212. The first heat sink fin 22 and the second heat sink fin 23 are connected to the outer wall of the heat conducting rod 21. The first heat sink fin 22 is connected to the outer wall of the condensation section 212. The first heat sink fin 22 is a plurality of aluminum sheets arranged horizontally, thereby expanding the contact area between the condensation section 212 and the air. The second heat sink fin 23 is connected to the outer wall of the evaporation section 211. The second heat sink fin 23 is also a plurality of aluminum sheets arranged horizontally, thereby expanding the contact area between the evaporation section 211 and the air. The slider 34 is connected to the partition sheet 24. A through hole corresponding to the heat sink assembly 2 is provided on the top wall of the box body 1. When the displacement assembly 3 drives the heat sink assembly 2 to move up and down, the heat sink assembly 2 switches between the first position and the second position. In the first position, the first heat sink fin 22 is located inside the box body 1, and in the second position, the first heat sink fin 22 is located outside the box body 1. When the heat dissipation component 2 is in the first position, the first heat dissipation fin 22 and the second heat dissipation fin 23 are both located in the box body 1, and the top fin of the first heat dissipation fin 22 is flush with the top wall of the box body 1; when the slider 34 moves upward, the entire heat dissipation component 2 is driven to move upward through the partition 24, and the first heat dissipation fin 22 passes through the through hole in the top wall of the box body 1 and extends out of the box body 1, and the upper end of the partition 24 is abutted against the inner top wall of the box body 1. At this time, the second heat dissipation fin 23 comes to the original position of the first heat dissipation fin 22, and the heat dissipation component 2 is in the second position.

[0032] like Figure 1 and Figure 5As shown, the first cooling fan 4 is connected to the back plate of the box 1, and the first cooling fan 4 is used to draw the air in the box 1 outward. The second cooling fan 5 is connected to the outer top wall of the box 1 and its position corresponds to the first cooling fin 22. The second cooling fan 5 is vertically arranged, and the front of the second cooling fan 5 is provided with a first filter 51 for filtering impurities in the air. When the second cooling fan 5 is working, it drives the airflow to move from the front to the back of the box 1. When the heat dissipation component 2 is in the second position, the airflow generated by the second cooling fan 5 passes through the first cooling fin 22, so that the first cooling fin 22 and the condensing section 212 can be cooled. A baffle is provided on the top of the second cooling fan 5. When the heat dissipation component 2 is in the second position, the top fin of the first cooling fin 22 is against the lower end surface of the baffle. At this time, it is also convenient to clean the first cooling fin 22 with a brush, reduce dust entering the box, and ensure the heat exchange effect of the fins.

[0033] like Figure 1 and Figure 2 As shown, a plurality of first ventilation holes 11 are provided on the side wall of the box body 1 close to the heat dissipation component 2, and a second filter is provided on the first ventilation hole 11. The first ventilation hole 11 corresponds to the position of the first heat dissipation fin 22. When the heat dissipation component 2 is in the first position, a negative pressure is generated in the box body 1 when the first heat dissipation fan 4 is working, and the external air enters the box body 1 from the first ventilation holes 11 through the first heat dissipation fin 22. The air flowing through the first heat dissipation fin 22 dissipates the first heat dissipation fin 22, and finally the air is discharged through the first heat dissipation fan 4; when the heat dissipation component 2 is in the second position, the external air enters the box body 1 from the first ventilation holes 11 through the second heat dissipation fin 23. The air flowing through the second heat dissipation fin 23 dissipates the second heat dissipation fin 23, and finally the air is discharged through the first heat dissipation fan 4.

[0034] like Figure 1 , Figure 3 and Figure 5As shown, a first heat-conducting block 61 is provided in the box 1. The first heat-conducting block 61 is used to connect to components with high heat generation in the box 1, such as a transformer. In this embodiment, the transformer is installed at the rear position of the top of the box 1, and the first heat-conducting block 61 is connected to its front end. A second heat-conducting block 62 is provided on one side of the second heat dissipation fin 23. The second heat-conducting block 62 is integrally connected with the second heat dissipation fin 23 to achieve a good heat transfer effect. A first slope is provided on the first heat-conducting block 61, and a second slope corresponding to the first slope is provided on the second heat-conducting block 62. When the heat dissipation component 2 is in the second position, the first slope of the first heat-conducting block 61 contacts the second slope of the second heat-conducting block 62, and a first frosted layer 611 is provided on the first slope, and a second frosted layer 621 corresponding to the first frosted layer 611 is provided on the second slope. The design of the two frosted layers can increase the contact area of ​​the two heat-conducting blocks and thus improve the heat transfer effect. The heat of the first heat-conducting block 61 is transferred to the second heat-dissipating fin 23 and the evaporating section 211 through the second heat-conducting block 62, and the heat dissipation effect of the main heat-generating components is improved through solid heat transfer.

[0035] When the present embodiment is in use, when the power supply box is used for a short time or the temperature of the main heating components inside is not high, the heat dissipation assembly 2 is in the first position, the first heat dissipation fin 22 and the condensation section 212 dissipate heat through the air entering through the first ventilation hole 11, and the front of the box body 1 is provided with a second ventilation hole, and part of the air enters the box body 1 from the second ventilation hole to dissipate heat for the components, and finally the air is discharged through the first cooling fan 4. When the power supply box is used for a long time or the temperature of the main heating components inside is high, the displacement assembly 3 drives the heat dissipation assembly 2 to move to the second position, at which time the first heat conduction block 61 contacts the second heat conduction block 62, and the heat of the main components is transferred to the second heat dissipation fin 23 and the evaporation section 211 of the heat dissipation assembly 2 through the two heat conduction blocks, and the cooling fan 5 works to dissipate heat for the first heat dissipation fin 22 and the condensation section 212. Since the first heat dissipation fin 22 and the condensation section 212 are located outside the box body 1, it is beneficial to reduce the temperature inside the box body 1, and the cooling fan 5 dissipates heat alone, and the heat dissipation effect is good.

[0036] Example 2

[0037] like Figure 6 As shown, the difference from Example 1 is that the first cooling fins 22 of this embodiment are arranged vertically, and the first cooling fins 22 are arranged in an array on the outer wall of the condensing section 212 of each heat-conducting rod 21, and the second cooling fan 5 of this embodiment is arranged horizontally, and the second cooling fan 5 is connected to the outer top wall of the box body 1 through a second bracket, and the second cooling fan 5 is located above the first cooling fins 22. When the first cooling fins 22 are in the second position, the airflow generated by the second cooling fan 5 passes downward through the first cooling fins 22, thereby dissipating the heat of the first cooling fins 22, and the airflow is blocked by the partition plate 24 and diffused to the surroundings.

[0038] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A high-frequency pulse hot-press welding power source, characterized in that: The invention comprises a housing (1), a heat dissipation component (2) arranged in the housing (1), a displacement component (3) connected to the heat dissipation component (2), and a first heat dissipation fan (4) connected to the housing (1); the heat dissipation component (2) comprises a heat conducting rod (21) and a first heat dissipation fin (22) and a second heat dissipation fin (23) arranged on the heat conducting rod (21); the displacement component (3) is used to drive the heat dissipation component (2) to move so as to switch the heat dissipation component (2) between a first position and a second position; wherein, in the first position, the first heat dissipation fin (22) is located in the housing (1); and in the second position, the first heat dissipation fin (22) is located outside the housing (1); the heat conducting rod (21) adopts a heat pipe, and the heat conducting rod (21) comprises an evaporation section (211) and a condensation section (212). ), the first heat dissipation fin (22) is connected to the condensing section (212), the second heat dissipation fin (23) is connected to the evaporating section (211), a second heat dissipation fan (5) corresponding to the first heat dissipation fin (22) is connected to the outside of the housing (1), when the heat dissipation component (2) is in the second position, the airflow generated by the second heat dissipation fan (5) passes through the first heat dissipation fin (22), the displacement component (3) comprises a displacement seat (31), a drive motor (32) connected to the displacement seat (31), a lead screw (33) connected to the drive motor (32), and a slider (34) movably connected to the lead screw (33), the slider (34) being connected to the heat dissipation component (2), and a first ventilation hole (11) is provided at a position of the side wall of the housing (1) corresponding to the first heat dissipation fin (22).

2. The high-frequency pulse hot pressure welding power source according to claim 1, characterized in that: The displacement component (3) drives the heat dissipation component (2) to move up and down, and the second heat dissipation fan (5) is connected to the outer top wall of the box body (1).

3. The high-frequency pulse hot pressure welding power source according to claim 1, characterized in that: A first heat-conducting block (61) is provided in the box body (1), and a second heat-conducting block (62) is provided on the second heat-dissipating fin (23); when the heat-dissipating assembly (2) is in the second position, the second heat-conducting block (62) is in contact with the first heat-conducting block (61).

4. The high-frequency pulse hot pressure welding power source according to claim 3, characterized in that: The first heat conducting block (61) is provided with a first slope surface, and the second heat conducting block (62) is provided with a second slope surface corresponding to the first slope surface.

5. The high-frequency pulse hot pressure welding power source according to claim 4, characterized in that: A first frosted layer (611) is provided on the first slope surface, and a second frosted layer (621) corresponding to the first frosted layer (611) is provided on the second slope surface.

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