Pin welding auxiliary device, demolding tool and use method of demolding tool

Abstract

The invention discloses a contact pin welding auxiliary device, a demolding tool and a using method of the demolding tool. A plurality of second contact pin insertion holes are formed in a contact pin insertion module, and a first positioning pin is further arranged on the contact pin insertion module; the aluminum substrate PCB is provided with a plurality of first pin jacks, and the aluminum substrate PCB is further provided with first positioning holes matched with the first positioning pins; the reflow soldering tray is attached to the pin insertion module and provided with a plurality of third pin insertion holes, the reflow soldering tray is provided with second positioning holes matched with the first positioning pins, and the reflow soldering tray is located between the pin insertion module and the aluminum substrate PCB; a third positioning hole is formed in the combined lower pressing block, the third positioning hole is matched with the first positioning pin, and the combined lower pressing block is arranged on the side, away from the reflow soldering tray, of the pin inserting module; the contact pin is inserted into the second contact pin jack, and the other end of the contact pin is inserted into the first contact pin jack. The method has the advantages of reducing manual welding procedures, improving production efficiency, being simple in operation and high in practicability.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical manufacturing and pin welding, and in particular to a pin welding auxiliary device, a demoulding tool and a use method thereof. Background Art

[0002] At present, the circuit board (PCB) is a basic material for supporting and connecting electronic components and is widely used in electronic devices. It is made of insulating material, covered with conductive paths and connection holes, and is used for the installation and interconnection of electronic components. Electronic assembly is to install and solder components to the PCB to achieve the purpose of electrical and mechanical connection. When soldering PCB pins, manual soldering is mostly used, which is relatively inefficient. At the same time, it is difficult to balance the operating conditions when manually soldering multiple solder joints, which may lead to quality problems such as poor solder joint connection and uneven arrangement.

[0003] In the prior art, in recent years, through-hole reflow soldering technology has been widely used in the surface mounting process. It mainly uses the reflow oven in the surface mounting equipment to evenly heat the solder paste at the solder joint position to melt it and then form a uniform metal solder joint, and solder the PCB pad and the component pin together to form a circuit connection and mechanical connection. This reflow soldering method is highly efficient, and the production conditions are easy to control, so the product welding quality consistency is also very high. If the pin welding is not firmly positioned, the welding quality cannot be guaranteed, and the pin body is prone to floating and skew defects. Therefore, it is necessary to design special auxiliary tools based on the product characteristics for such defects to help achieve product production and ensure welding quality.

[0004] Currently, there are few solutions for soldering pins on PCBs with aluminum substrates in the market. Due to the large number of pins, it is impossible to open holes on the aluminum substrate to position the pins, so the verticality of the pins cannot be guaranteed during soldering.

[0005] In summary, there is at least one of the following technical problems:

[0006] The pin body is prone to floating and skew defects, and the welding quality cannot be guaranteed if the pin welding is not firmly positioned;

[0007] There are a large number of pins, and it is impossible to open holes on the aluminum substrate to position the pins, so the verticality of the pins cannot be guaranteed during welding. Summary of the invention

[0008] The main purpose of the present invention is to provide a pin welding auxiliary device, a demoulding tool and a method of using the same, so as to solve the defects in the prior art that the pin body is prone to floating and skewing, and the welding quality cannot be guaranteed if the pin is not firmly positioned; there are a large number of pins, and holes cannot be opened on the aluminum substrate to position the pins, which leads to the technical problem that the verticality of the pins cannot be guaranteed during welding.

[0009] In order to achieve the above object, according to one aspect of the present invention, a pin welding auxiliary device is provided, comprising:

[0010] A pin insertion module, wherein the pin insertion module is provided with a plurality of second pin insertion holes, and the pin insertion module is also provided with a first positioning pin;

[0011] An aluminum substrate PCB board, wherein the aluminum substrate PCB board has a plurality of first pin insertion holes, and the substrate PCB also has a first positioning hole matched with a first positioning pin;

[0012] A reflow soldering tray, which is attached to the pin insertion module and is provided with a plurality of third pin insertion holes. The reflow soldering tray has a second positioning hole that cooperates with the first positioning pin, and the reflow soldering tray is located between the pin insertion module and the aluminum substrate PCB board;

[0013] A composite pressing block, wherein a third positioning hole is provided on the composite pressing block, wherein the third positioning hole cooperates with the first positioning pin, and the composite pressing block is arranged on a side of the pin insertion module away from the reflow soldering tray; and

[0014] A plug pin, one end of which is inserted into the second plug pin socket of the plug pin module, and the other end of which is inserted into the first plug pin socket of the aluminum substrate PCB board.

[0015] Preferably, it further comprises a second positioning pin, wherein the second positioning pin is inserted into the reflow tray and the pin insertion module.

[0016] Preferably, a solder paste of appropriate thickness is applied on the welding surface of the aluminum-based PCB board, and the patch components are attached to the corresponding positions.

[0017] Preferably, the pin insertion module, the aluminum substrate PCB board, the reflow soldering tray, the synthetic lower pressure block pins and the patch components are integrated into a fixing device, and the fixing device is placed in a reflow furnace to perform reflow soldering of the patch components and the pins.

[0018] Preferably, the synthetic lower pressing block presses the outer side of the welding surface of the aluminum-based PCB board.

[0019] According to another aspect of the present invention, a demoulding tool for a pin welding auxiliary device is provided, comprising:

[0020] Base plate;

[0021] A vertical plate, the vertical plate is vertically arranged on the bottom plate;

[0022] Support plates, the support plates are arranged in pairs on the bottom plate, and one side of the support plates is connected to the vertical plate;

[0023] An auxiliary device, the auxiliary device being arranged between the pair of support plates;

[0024] Guide rods, the guide rods are arranged vertically on the bottom plate in pairs;

[0025] A lower pressing block, wherein the lower pressing block is sleeved on the guide rod;

[0026] A guide rod fixing plate, wherein the guide rod fixing plate is arranged at the upper end of the guide rod;

[0027] A quick clamp is arranged above the lower pressing block, the quick clamp is connected to the quick clamp pad through the vertical plate, and the quick clamp pad is connected to the vertical plate.

[0028] Preferably, a reinforcement plate is provided on the vertical plate.

[0029] Preferably, the pressing block is connected to the first positioning pin of the auxiliary device via a connecting piece.

[0030] According to another aspect of the present invention, a method for using a pin welding auxiliary device is provided, comprising:

[0031] Sleeve the second positioning hole of the reflow soldering board on the first positioning pin shaft of the pin insertion module, and then, according to the arrangement and distribution of the first pin through-hole on the insertion surface of the aluminum-based PCB board, insert the pin upside down into the corresponding second pin through-hole on the pin insertion module, and then align the first positioning hole of the aluminum-based PCB board with the first positioning pin, and let the insertion surface face the reflow soldering tray, so that the pin can be accurately inserted into the aluminum-based PCB board;

[0032] Apply a proper amount of solder paste on the welding surface of the aluminum-based PCB board, and then attach the SMD components to the corresponding positions;

[0033] Align the third positioning hole on the composite lower pressing block with the first positioning pin, press the welding surface of the aluminum-based PCB board, and make sure that the welding ends of the pins are all against the inner side surface of the composite lower pressing block. Confirm that the aluminum-based PCB board and the pins are installed in place on the device, so as to ensure that the pins and the aluminum-based PCB board maintain accurate verticality and height;

[0034] Then the fixture loaded with the aluminum-based PCB board is placed into the reflow oven to complete the reflow soldering of the chip components and pins.

[0035] The application of the technical solution of the present invention has the following technical effects:

[0036] The pin is inserted upside down on the pin insertion block, and the welding end of the pin passes through the insertion surface of the aluminum-based PCB board and exposes the welding surface. The welding surface is coated with solder paste and SMD components. A cover plate is provided on the outside of the welding surface. The pin insertion block and the aluminum-based PCB board are positioned and fixed by positioning pins, and the cover plate is used for gravity positioning. Placing the fixing device as a whole in the reflow oven can ensure the height consistency of the pin after welding, and realize the welding of the pin and the SMD component at the same time, which not only solves the problem of low efficiency of manual welding, but also improves the production quality of PCB boards, reduces the manual welding process, improves production efficiency, is simple to operate, and has strong practicality.

[0037] Rapid positioning to ensure accurate alignment of welding points, improve welding quality and reliability. Significantly shorten welding time and improve production efficiency. Reduce deviations caused by human factors and improve consistency and stability.

[0038] Achieve rapid demoulding. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0040] Figure 1 A schematic diagram of the TOP surface of a pin insertion module of a pin welding auxiliary device according to the present invention is shown;

[0041] Figure 2 Shows Figure 1 A surface view of a pin insertion module BTM of a pin welding auxiliary device;

[0042] Figure 3 Shows Figure 1 View of the reflow tray for the pin soldering aid in the;

[0043] Figure 4 Shows Figure 1 A view of a composite push-down block of a pin soldering aid;

[0044] Figure 5 Shows Figure 1 Pin straightening assembly device for pin welding auxiliary device

[0045] view;

[0046] Figure 6 Shows Figure 1 A view of a pin-rightening PCB assembly device of a pin soldering auxiliary device;

[0047] Figure 7 Shows Figure 1A side view of a pin-rightening PCB assembly device of a pin soldering auxiliary device;

[0048] Figure 8 Shows Figure 1 A demoulding tooling view of the pin welding auxiliary device;

[0049] Fig. 9 Shows Figure 1 A side view of a demoulding tooling of a pin welding auxiliary device;

[0050] Fig.10 Shows Figure 1 Front view of the demoulding tooling of the pin welding auxiliary device;

[0051] Fig.11 Shows Figure 1 Engineering example view of the pin soldering aid in Figure 1.

[0052] The above drawings include the following reference numerals:

[0053] Pin insertion module 1; reflow tray 2; synthetic pressing block 3; aluminum substrate PCB board 4; pin 5; demoulding tooling 6; quick clamp 61; pressing block 62; guide rod 63; support plate 64; bottom plate 65; quick clamp pad 66; guide rod fixing plate 67; vertical plate 68; reinforcement plate 69; PCS mainboard 8; aluminum base power board 9. DETAILED DESCRIPTION

[0054] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0055] like Figures 1 to 11As shown, the embodiment of the present invention provides a pin 5 soldering auxiliary device, including: a pin 5 plug-in module 1, the pin 5 plug-in module 1 is provided with a plurality of second pin 5 plug-in holes, and the pin 5 plug-in module is also provided with a first positioning pin; an aluminum substrate PCB board 4, the aluminum substrate PCB board 4 has a plurality of first pin 5 plug-in holes, and the aluminum substrate PCB also has a first positioning hole matched with the first positioning pin; a reflow soldering tray 2, the reflow soldering tray 2 is attached to the pin 5 plug-in module 1, and the reflow soldering tray 2 has a first positioning pin matched with the first positioning pin A second positioning hole that cooperates with the pin, the reflow tray 2 is located between the pin 5 plug-in module 1 and the aluminum substrate PCB board 4; a synthetic downward pressure block 623, the synthetic downward pressure block 623 is provided with a third positioning hole, the third positioning hole cooperates with the first positioning pin, the synthetic downward pressure block 623 is arranged on the side of the pin 5 plug-in module away from the reflow tray 2; and the pin 5, one end of the pin 5 is inserted in the second pin 5 socket of the pin 5 module, and the other end is inserted in the first pin 5 socket of the aluminum substrate PCB board 4.

[0056] In this embodiment, a pin 5 plug-in module 1 is provided with a plurality of second pin 5 plug-in holes, and a first positioning pin is also provided on the pin 5 plug-in module; an aluminum substrate PCB board 4 is provided with a plurality of first pin 5 plug-in holes, and the substrate PCB also has a first positioning hole that cooperates with the first positioning pin; a suitable amount of solder paste is applied to the welding surface of the aluminum-based PCB board, and the patch components are attached to the corresponding positions. A reflow soldering tray 2, which is attached to the pin 5 plug-in module 1 and is provided with a plurality of third pin 5 plug-in holes. The reflow soldering tray 2 has a second positioning hole that cooperates with the first positioning pin. The reflow soldering tray 2 is located between the pin 5 plug-in module 1 and the aluminum substrate PCB board 4; a composite lower pressing block 623, which is provided with a third positioning hole, which cooperates with the first positioning pin. The composite lower pressing block 623 is arranged on the side of the pin 5 plug-in module 1 away from the reflow soldering tray 2, and the composite lower pressing block 623 presses the outer side of the welding surface of the aluminum substrate PCB board. Pin 5, one end of the pin 5 is inserted into the second pin 5 plug-in hole of the pin 5 plug-in module, and the other end is inserted into the first pin 5 plug-in hole of the aluminum substrate PCB board 4. It also includes a second positioning pin, which is inserted into the reflow soldering tray 2 and the pin 5 plug-in module 1. The pin 5 plug-in module 1, the aluminum substrate PCB board 4, the reflow soldering tray 2, the synthetic lower pressing block 623, the pin 5 and the patch component are integrated into a fixing device, and the fixing device is placed in a reflow furnace to perform reflow soldering of the patch component and the pin 5.

[0057] Specifically, the present invention includes a pin 5 insertion module 1, a reflow soldering tray 2, and a composite pressing block 623. The pin 5 insertion module 1 and the reflow soldering tray 2 are provided with a plurality of pin 5 through holes that are adapted to the size and spacing of the pin 5. The pin 5 is inserted upside down in the pin 5 through holes and fixed. The composite pressing block 623 presses the outer side of the welding surface of the aluminum-based PCB board. In the above-mentioned fixing device for welding the pin 5 of the aluminum-based PCB board, a first positioning hole is provided on the aluminum-based PCB board, a first positioning pin corresponding to the first positioning hole is provided on the pin 5 insertion block, and a corresponding positioning pin hole is provided on the upper cover plate. The pin 5 is inserted upside down on the pin 5 insertion block, and the welding end of the pin 5 passes through the insertion surface of the aluminum-based PCB board and exposes the welding surface. The welding surface is coated with solder paste and patch components, and a cover plate is provided on the outer side of the welding surface. The pin 5 insertion block and the aluminum-based PCB board are positioned and fixed by the positioning pins, and the cover plate is used for gravity positioning. Placing the fixture as a whole into the reflow oven can ensure that the height of the pin 5 is consistent after welding, and realize the welding of the pin 5 and the patch component at the same time, which not only solves the problem of low efficiency of manual welding, but also improves the production quality of the PCB board, reduces the manual welding process, improves the production efficiency, is simple to operate, and has strong practicality.

[0058] In this embodiment, the reflow tray 2 is provided with positioning holes on the aluminum-based PCB board, corresponding to the positioning pins on the pin 5 plug-in module 1. The number of positioning pins of the present invention is four, and the pin 5 plug-in block is provided with a plurality of second pin 5 through holes, and the pin 5 is inserted upside down in the second pin 5 through holes and fixed. The synthetic lower pressing block 623 is also provided with positioning pin holes corresponding to the positioning pins, which are used for accurate positioning with the pin 5 plug-in block and the aluminum-based PCB board. According to the arrangement and distribution of the pin 5 through holes on the plug-in surface of the aluminum-based PCB board, the pin 5 is inserted upside down in the corresponding pin 5 through hole on the pin 5 plug-in module 1, and then the positioning hole of the aluminum-based PCB board is aligned with the positioning pin, and the plug-in surface is facing the reflow tray 2, so that the pin 5 is accurately inserted on the aluminum-based PCB board. Apply a suitable amount of solder paste on the welding surface of the aluminum-based PCB board, and then attach the patch component to the corresponding position. Align the positioning pin holes on the composite pressing block 623 with the positioning pins, press the welding surface of the aluminum-based PCB board, and all the welding ends of the pins 5 are against the inner side of the composite pressing block 623, confirming that the aluminum-based PCB board and the pins 5 are installed in place on the device, thereby ensuring that the pins 5 and the aluminum-based PCB board can maintain precise verticality and height. Then put the fixture loaded with the aluminum-based PCB board 4 into the reflow furnace, and the reflow soldering of the patch components and the pins 5 can be completed at the same time, which can ensure the consistency of the height of the pins 5 after soldering, as well as the soldering quality of the patch components, and avoid the floating and skew defects of the pins 5 and the cold soldering defects of the patch components.

[0059] In the engineering example of this embodiment, the aluminum substrate is a material with good thermal conductivity and is often used in radiators. On the power board, the aluminum substrate is usually used in the radiator to help the radiator dissipate heat. The PCS mainboard 8 in this engineering example is equivalent to a transfer station, on which functional circuit boards such as the control board, AC-DC drive board, and DC-DC drive board are inserted. The power tube is placed separately on the aluminum substrate. The heat dissipation effect of the aluminum substrate is utilized, and the two boards are connected through the pins 5 to complete the function of the entire PCS. Compared with other existing technologies, the specific engineering example of the application of the present invention can realize the rapid positioning and installation of the multi-PIN pins 5 of the circuit board, and realize the connection between the PCS mainboard 8 and the power board by welding with the aluminum-based power board 9 underneath, so as to achieve the desired electrical interconnection effect, and no additional tooling is required, saving costs. Through the use verification of the present invention, the comprehensive calculation of the material cost, processing cost, and transportation cost of the product saves about 10% of the overall cost of the product. This engineering example includes two components, the PCS mainboard 8 and the aluminum-based power board 9. The positions and connection relationships between the components are as follows: the PCS mainboard 8 and the aluminum-based power board 9 are welded via pins 5; during operation, the functions of the entire PCS are completed through the components thereon and the control board, drive board, etc. inserted thereon; the aluminum-based power board 9, on which the main components are power tubes, and the function of the aluminum substrate is to dissipate heat for the power tubes. For the PCS mainboard 8 or other printed circuit boards in the field of PCS or inverter power supply or microgrid energy storage system, in some cases, two circuit boards need to be welded together with multiple pins 5, so there is no need to make additional tooling, and they can be positioned accurately and quickly to ensure accurate alignment of the welding points and improve welding quality and reliability. Secondly, the two circuit boards are directly welded together to complete the interconnection control of this part.

[0060] According to another aspect of the present invention, a demoulding tool 6 of a pin 5 welding auxiliary device is provided, comprising: a bottom plate 65; a vertical plate 68, the vertical plate 68 is vertically arranged on the bottom plate 65; a reinforcing plate 69 is arranged on the vertical plate 68. Support plates 64, the support plates 64 are arranged on the bottom plate 65 in pairs, and one side of the support plates 64 is connected to the vertical plate 68; an auxiliary device, the auxiliary device is arranged between the paired support plates 64; a guide rod 63, the guide rod 63 is vertically arranged on the bottom plate 65 in pairs; a lower pressing block 62, the lower pressing block 62 is sleeved on the guide rod 63; the lower pressing block 62 is connected to the first positioning pin of the auxiliary device through a connecting piece. A guide rod fixing plate 67, wherein the guide rod fixing plate 67 is arranged at the upper end of the guide rod 63; a quick clamp 61, wherein the quick clamp 61 is arranged above the lower pressure block 62, wherein the quick clamp 61 is connected to the quick clamp pad 66 via the vertical plate 68, wherein the quick clamp pad 66 is connected to the vertical plate 68, and is used to remove the above-mentioned pin 5 welding auxiliary device from the aluminum-based PCB board. The demolding tool 6 is composed of the following parts: a quick clamp 61, a lower pressure block 62, a guide rod 63, a support plate 64, a bottom plate 65, a quick clamp pad 66, a guide rod fixing plate 67, a vertical plate 68 and a reinforcement plate 69.

[0061] The quick clamp 61 supports a straight side surface, the lower pressing plate is vertically mounted on the straight side surface, the extraction assembly includes a lower pressing plate and a pin 5 straightening assembly device, the lower pressing plate is slidably mounted on the straight side surface, the sliding direction of the quick clamp 61 is perpendicular to the plane where the upper end of the lower pressing plate is located, the upper end of the support plate 64 is formed with a receiving groove for placing the aluminum-based PCB board, and the pin 5 straightening assembly device is installed at the lower end of the lower pressing plate for clamping the pin 5 plug-in module 1. Four ejector pins are installed on the lower pressing plate at the upper end of the receiving groove to prevent the aluminum-based PCB board from escaping from the upper end opening of the receiving groove. A guide rod 63 is provided between the bottom plate 65 and the guide rod fixing plate 67, and a slide groove matching the guide rod 63 is formed on the lower pressing plate, and the length direction of the guide rod 63 is arranged perpendicular to the plane where the upper end of the lower pressing plate is located. The upper end of the lower pressing plate is provided with a quick clamp 61 for driving the lower pressing plate to slide.

[0062] When welding is completed, the combined module of the aluminum-based PCB board and the pin 5 plug-in module 1 is placed in the accommodating groove, and then the lower pressure plate is clamped with the quick clamp 61. Since the sliding direction of the quick clamp 61 is perpendicular to the plane where the upper end of the lower pressure plate is located, the quick clamp 61 slides upward, and the pin 5 plug-in module 1 can be taken out vertically, effectively preventing the pin 5 from being knocked crooked when the pin 5 plug-in module 1 is taken out.

[0063] Another embodiment of the present invention provides a method for using a pin 5 welding auxiliary device, comprising:

[0064] The second positioning hole of the reflow soldering board is sleeved on the first positioning pin shaft of the pin 5 plug-in module 1. Then, according to the arrangement and distribution of the first pin 5 through-hole on the plug-in surface of the aluminum-based PCB board, the pin 5 is reversely inserted into the corresponding second pin 5 through-hole on the pin 5 plug-in module 1. Then, the first positioning hole of the aluminum-based PCB board is aligned with the first positioning pin, and the plug-in surface is facing the reflow soldering tray 2, so that the pin 5 is accurately inserted into the aluminum-based PCB board;

[0065] Apply a proper amount of solder paste on the welding surface of the aluminum-based PCB board, and then attach the SMD components to the corresponding positions;

[0066] Align the third positioning hole on the combined pressing block 623 with the first positioning pin, press the welding surface of the aluminum-based PCB board, and all the welding ends of the pins 5 are against the inner side surface of the combined pressing block 623, confirming that the aluminum-based PCB board and the pins 5 are installed in place on the device, thereby ensuring that the pins 5 and the aluminum-based PCB board maintain accurate verticality and height;

[0067] Then the fixture loaded with the aluminum-based PCB board is placed into the reflow oven to complete the reflow soldering of the chip components and the pins 5.

[0068] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0069] The pin 5 is inserted upside down on the pin 5 plug-in block. The soldering end of the pin 5 passes through the plug-in surface of the aluminum-based PCB board and exposes the soldering surface. The soldering surface is coated with solder paste and SMD components. A cover plate is provided on the outside of the soldering surface. The pin 5 plug-in block and the aluminum-based PCB board are positioned and fixed by positioning pins, and the cover plate is used for gravity positioning. Placing the fixing device as a whole into the reflow furnace can ensure that the height of the pin 5 after soldering is consistent, and at the same time, the soldering of the pin 5 and the SMD components is realized, which not only solves the problem of low efficiency of manual soldering, but also improves the production quality of the PCB board, reduces the manual soldering process, improves production efficiency, is simple to operate, and has strong practicality.

[0070] Rapid positioning to ensure accurate alignment of welding points, improve welding quality and reliability. Significantly shorten welding time and improve production efficiency. Reduce deviations caused by human factors and improve consistency and stability.

[0071] Achieve rapid demoulding.

[0072] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pin welding auxiliary device, characterized in that: include: A pin insertion module, wherein the pin insertion module is provided with a plurality of second pin insertion holes, and the pin insertion module is also provided with a first positioning pin; An aluminum substrate PCB board, wherein the aluminum substrate PCB board has a plurality of first pin insertion holes, and the substrate PCB also has a first positioning hole matched with a first positioning pin; A reflow soldering tray, which is attached to the pin insertion module and is provided with a plurality of third pin insertion holes. The reflow soldering tray has a second positioning hole that cooperates with the first positioning pin, and the reflow soldering tray is located between the pin insertion module and the aluminum substrate PCB board; A composite pressing block, wherein a third positioning hole is provided on the composite pressing block, wherein the third positioning hole cooperates with the first positioning pin, and the composite pressing block is arranged on a side of the pin insertion module away from the reflow soldering tray; and A plug pin, one end of which is inserted into the second plug pin socket of the plug pin module, and the other end of which is inserted into the first plug pin socket of the aluminum substrate PCB board.

2. The pin soldering auxiliary device according to claim 1, characterized in that: It also includes a second positioning pin, which is inserted into the reflow tray and the pin insertion module.

3. The pin soldering auxiliary device according to claim 1, characterized in that: A suitable amount of solder paste is applied to the welding surface of the aluminum-based PCB board, and the patch components are attached to the corresponding positions.

4. The pin soldering auxiliary device according to claim 1, characterized in that: The pin insertion module, the aluminum substrate PCB board, the reflow soldering tray, the synthetic lower pressing block pins and the patch components are integrated into a fixing device, and the fixing device is placed in a reflow furnace to perform reflow soldering of the patch components and the pins.

5. The pin soldering auxiliary device according to claim 1, characterized in that: The composite lower pressing block presses the outer side of the welding surface of the aluminum-based PCB board.

6. The pin soldering auxiliary device according to claim 1, characterized in that: The plug pin matches with the first plug pin socket and the second plug pin socket.

7. A demoulding tool for a pin welding auxiliary device, based on the pin welding auxiliary device according to any one of claims 1 to 6, characterized in that: include: Base plate; A vertical plate, the vertical plate is vertically arranged on the bottom plate; Support plates, the support plates are arranged in pairs on the bottom plate, and one side of the support plates is connected to the vertical plate; An auxiliary device, the auxiliary device being arranged between the pair of support plates; Guide rods, the guide rods are arranged vertically on the bottom plate in pairs; A lower pressing block, wherein the lower pressing block is sleeved on the guide rod; A guide rod fixing plate, wherein the guide rod fixing plate is arranged at the upper end of the guide rod; A quick clamp is arranged above the lower pressing block, the quick clamp is connected to the quick clamp pad through the vertical plate, and the quick clamp pad is connected to the vertical plate.

8. The demoulding tool of the pin welding auxiliary device according to claim 1, characterized in that: A reinforcement plate is provided on the vertical plate.

9. The demoulding tool of the pin welding auxiliary device according to claim 1, characterized in that: The pressing block is connected to the first positioning pin of the auxiliary device through a connecting piece.

10. A method for using a pin soldering auxiliary device, based on the pin soldering auxiliary device according to any one of claims 1 to 6, characterized in that: include: Sleeve the second positioning hole of the reflow soldering board on the first positioning pin shaft of the pin insertion module, and then, according to the arrangement and distribution of the first pin through-hole on the insertion surface of the aluminum-based PCB board, insert the pin upside down into the corresponding second pin through-hole on the pin insertion module, and then align the first positioning hole of the aluminum-based PCB board with the first positioning pin, and let the insertion surface face the reflow soldering tray, so that the pin can be accurately inserted into the aluminum-based PCB board; Apply a proper amount of solder paste on the welding surface of the aluminum-based PCB board, and then attach the SMD components to the corresponding positions; Align the third positioning hole on the composite lower pressing block with the first positioning pin, press the welding surface of the aluminum-based PCB board, and make sure that the welding ends of the pins are all against the inner side surface of the composite lower pressing block. Confirm that the aluminum-based PCB board and the pins are installed in place on the device, so as to ensure that the pins and the aluminum-based PCB board maintain accurate verticality and height; Then the fixture loaded with the aluminum-based PCB board is placed into the reflow oven to complete the reflow soldering of the chip components and pins.

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