DBC pre-welding auxiliary device and control method

Abstract

The present application relates to the field of IGBT technology, and specifically to a DBC pre-welding auxiliary device and control method, wherein the device includes a plurality of DBC fixtures, a visual camera, a lifting assembly, a welding assembly, a blanking assembly and a control module, wherein the upper end surface of the DBC fixture has a groove adapted to the DBC, and the side is provided with a fixture number, and the visual camera is used to obliquely photograph the DBC fixture of the plate structure, identify the side fixture number of the plate structure, and collect the DBC frame in the topmost DBC fixture in real time. The present application uses an image recognition model to identify the fixture number to obtain the DBC position standard, so as to monitor in real time whether the DBC moves. Therefore, the present invention can greatly reduce the movement of the DBC, thereby increasing the accuracy of DBC patch welding, and also reduces the problem of grabbing and losing when blanking the DBC.

Description

Technical Field

[0001] The present application relates to the field of IGBT technology, and in particular to a DBC pre-welding auxiliary device and a control method. Background Art

[0002] In the complex process of IGBT module welding, the terminal welding on DBC is a critical link. Generally speaking, before carrying out this welding step, solder paste pre-pointing or solder sheet pre-setting operations must be performed on the DBC.

[0003] When pre-dosing solder paste, professional dispensing equipment is required to accurately apply the solder paste to the specified position on the surface of the DBC according to a specific pattern and amount. This precise operation can ensure that in the subsequent soldering process, the solder paste can provide sufficient and uniform soldering connections for the terminals after melting, ensuring the reliability and stability of welding. The process of pre-setting solder pieces also requires a high degree of precision. When placing the solder piece on the DBC, its position and angle need to be strictly controlled to ensure that in the subsequent reflow soldering, the solder piece can be perfectly integrated with the terminal, thereby forming a stable electrical and mechanical connection. After completing the pre-dosing of solder paste or pre-setting of solder pieces, the next step is to fix one end of the terminal to be soldered on the solder paste or solder piece for reflow soldering.

[0004] Normally, the pre-soldering of the solder piece is to place the DBC directly on the reflow tray, then cut the solder piece into a suitable size with a cutter and use a nozzle to place the solder piece on the DBC for reflow soldering.

[0005] In the prior art, due to the small size and light weight of the DBC itself, there is a lack of effective positioning and restraint mechanisms on the reflow tray. In the normal environment of a production workshop, even slight equipment vibrations, airflow disturbances, or slight displacements of the tray during transportation can easily cause the movement of the DBC. This movement is uncontrollable, and it is difficult to predict its offset direction and distance. This problem directly leads to the inability to achieve precise placement in the subsequent solder chip placement process. Because the placement equipment usually operates according to preset coordinates and programs, the position uncertainty of the DBC makes it difficult to accurately place the solder chip in the expected welding position. This not only greatly reduces production efficiency, increases the complexity and time cost of operations, but also seriously affects the quality and yield of welding. In addition, the resulting slight movement will also make the DBC unable to recognize and grasp.

[0006] Therefore, there is currently a lack of a DBC pre-soldering auxiliary device and control method to avoid micro-movement in the solder piece mounting process. Summary of the invention

[0007] The disclosed embodiment provides a DBC pre-welding auxiliary device and control method, which are used to solve the problem in the prior art that the DBC will produce a slight displacement during welding, resulting in insufficient welding accuracy and inability to grab and cut materials.

[0008] The embodiment of the present disclosure provides a DBC pre-welding auxiliary device, comprising:

[0009] Multiple DBC fixtures are formed into a plate structure, the upper end surface of the plate structure has a groove adapted to the DBC, and the side surface is provided with a fixture number;

[0010] A visual camera is used to obliquely photograph the DBC fixture of the plate structure, identify the side fixture number of the plate structure, and collect the DBC frame in the top DBC fixture in real time;

[0011] Lifting assembly, used to lift the DBC fixture;

[0012] Welding assembly, used for welding DBC;

[0013] Unloading assembly, used to transfer the welded DBC fixture to the subsequent process;

[0014] The control module is respectively connected with the visual camera, the lifting component and the welding structure, and is used for controlling the operation of the visual camera, the lifting component and the welding structure.

[0015] Preferably, the DBC clamp comprises: a liquid crystal screen and a transparent clamp shell, wherein the transparent clamp shell is arranged on the upper end surface and side surface of the liquid crystal screen, the liquid crystal screen and the transparent clamp shell are detachably connected, wherein the upper end surface of the transparent clamp shell is provided with a groove adapted to the DBC.

[0016] Preferably, the material of the transparent fixture housing is transparent PVC.

[0017] Preferably, the jacking assembly comprises: a jacking rod and at least four limiting columns, the jacking rod is arranged at the bottom of the plurality of superimposed DBC clamps, and the limiting columns are arranged on four sides of the plate structure where the superimposed DBC clamps are located.

[0018] Preferably, it also includes: the unloading component is a conveying mechanism with a vacuum suction nozzle.

[0019] In a second aspect, an embodiment of the present disclosure provides a DBC pre-welding auxiliary control method, which is applied to the above-mentioned DBC pre-welding auxiliary device, and the method includes:

[0020] Training an image recognition model, wherein the image recognition model identifies the corresponding DBC welding standard and DBC position standard by obtaining the fixture label;

[0021] Get the fixture number of all DBC fixture sides;

[0022] According to the fixture number of the top DBC fixture, the corresponding DBC welding standard is identified by the image recognition model and sent to the welding assembly for welding;

[0023] Using the image recognition model to identify the corresponding DBC position standard;

[0024] Collect the DBC outline frame in the uppermost DBC fixture in real time to analyze whether the DBC position standard is met. If yes, continue; if no, stop adjusting.

[0025] According to the fixture number, load the DBC welding standard and DBC position standard of other DBC fixtures except the top DBC fixture;

[0026] After welding the top DBC fixture, transfer the top DBC fixture to the subsequent process and lift the other superimposed DBC fixtures.

[0027] Preferably, applied to a DBC pre-welding auxiliary device, the DBC fixture comprises: a liquid crystal screen and a transparent fixture housing;

[0028] Collect the DBC outline frame in the uppermost DBC fixture in real time and analyze whether the DBC position standards are the same, including:

[0029] Send the DBC position standard to the LCD screen of the uppermost DBC fixture;

[0030] The LCD screen displays a virtual box corresponding to the position of the DBC;

[0031] The virtual box is used as a reference to compare and analyze whether the DBC outline border meets the DBC position standard.

[0032] Preferably, the control method further comprises: if it is identified that the virtual box does not overlap with the DBC outline frame, the LCD screen issues an alarm.

[0033] Preferably, training the image recognition model includes:

[0034] Obtain the DBC welding standard for each fixture number;

[0035] Correlate fixture designations to DBC welding standards;

[0036] Place the DBC in the groove of the DBC fixture corresponding to each fixture number;

[0037] Use a visual camera to capture the DBC position in the DBC fixture as the DBC position standard corresponding to the fixture number, and associate the fixture number with the DBC position standard;

[0038] The DBC welding standard and DBC position standard are used as input, and the fixture number is used as the label to train the image recognition model.

[0039] Preferably, the control method further comprises: obtaining the profile of the upper end surface of the uppermost DBC fixture:

[0040] The contour of the upper end surface of the uppermost DBC fixture is used as a reference to compare and analyze whether the DBC contour frame meets the DBC position standard.

[0041] The disclosed embodiment provides a DBC pre-welding auxiliary device and control method, which uses an image recognition model to identify the fixture number to obtain the DBC position standard, thereby monitoring in real time whether the DBC moves. Therefore, the present invention can greatly reduce the movement of the DBC, thereby increasing the accuracy of DBC patch welding, and also reducing the problem of grabbing loss when the DBC is unloaded. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0043] Figure 1 is a schematic diagram (oblique view) of a DBC pre-welding auxiliary device provided by an embodiment of the present disclosure;

[0044] Figure 2 is a front view of a plurality of DBC clamps provided by an embodiment of the present disclosure;

[0045] Figure 3 is a top view of a plurality of DBC fixtures provided by an embodiment of the present disclosure;

[0046] Figure 4 is a flow chart of a DBC pre-welding auxiliary control method provided by an embodiment of the present disclosure;

[0047] Reference numerals:

[0048] 1: DBC fixture; 11: fixture number; 2: visual camera; 3: lifting assembly; 31: lifting rod; 32: limit column. DETAILED DESCRIPTION

[0049] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0050] The following description and accompanying drawings fully illustrate the specific embodiments of the present application so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process and other changes. The examples represent possible changes only. Unless explicitly required, separate components and functions are optional, and the order of operation may vary. The parts and features of some embodiments may be included in or replace the parts and features of other embodiments. The scope of the embodiments of the present application includes the entire scope of the claims, and all available equivalents of the claims. In this article, each embodiment may be represented individually or generally by the term "application", which is only for convenience, and if more than one application is disclosed in fact, it is not intended to automatically limit the scope of the application to any single application or application concept. In this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, without requiring or implying that there is any actual relationship or order between these entities or operations. Moreover, the terms "comprises", "includes" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method or device. In the absence of further restrictions, the elements defined by the sentence "including a..." do not exclude the presence of other identical elements in the process, method or device including the elements. The various embodiments herein are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments can be referred to each other. For the methods, products, etc. disclosed in the embodiments, since they correspond to the method part disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method part description.

[0051] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0052] Although the prior art can load the lead frame, the lead frame is clamped or sucked during the DBC pre-welding auxiliary process, which can easily cause direct damage to the lead frame and increase the probability of the lead frame falling to the ground. Therefore, there is currently a lack of a DBC pre-welding auxiliary device and control method to avoid clamping and sucking the lead frame and leaving the lead frame in a suspended state.

[0053] The disclosed embodiment provides a DBC pre-welding auxiliary device and control method, which avoids clamping and sucking of the lead frame and leaves the lead frame in a suspended state, thereby improving the safety of the lead frame and reducing damage.

[0054] See also Figure 1 , which is a schematic diagram of a DBC pre-welding auxiliary device provided in an embodiment of the present disclosure. The DBC pre-welding auxiliary device comprises: a plurality of DBC fixtures 1, a visual camera 2, a lifting assembly 3, a welding assembly (not shown in the figure), a blanking assembly (not shown in the figure) and a control module (not shown in the figure).

[0055] See also Figure 2 and Figure 3 , which are respectively the front view and the top view of a plurality of DBC clamps 1 provided in the embodiments of the present disclosure.

[0056] A plurality of DBC fixtures 1 are formed into a plate structure, the upper end surface of the plate structure has a groove adapted to the DBC, and the side surface is provided with a fixture number 11. The groove is used to limit the DBC. Figure 2 , a clamp number 11 is displayed on the side of multiple DBC clamps 1.

[0057] The visual camera 2 is used to obliquely photograph the DBC fixture 1 of the plate structure, identify the side fixture number 11 of the plate structure, and collect the DBC frame in the uppermost DBC fixture in real time. Figure 1 The dotted line in is the shooting angle of vision camera 2.

[0058] The lifting assembly 3 is used to lift the DBC clamp 1. The lifting assembly 3 includes a lifting rod 31 and at least four limiting columns 32. The lifting rod 31 is arranged at the bottom of the plurality of stacked DBC clamps 1, and the limiting columns 32 are arranged on four sides of the plate structure where the stacked DBC clamps 1 are located.

[0059] Welding assembly, used to weld the DBC.

[0060] The unloading assembly is used to transfer the DBC fixture 1 that has completed welding to a subsequent process. The unloading assembly is a conveying mechanism with a vacuum suction nozzle.

[0061] The control module is connected to the visual camera 2, the lifting assembly 3 and the welding structure respectively, and is used to control the operation of the visual camera 2, the lifting assembly 3 and the welding structure.

[0062] It should be understood that before using the DBC pre-welding auxiliary device, multiple DBC fixtures 1 are preset to be placed according to the design requirements to ensure that the groove position of each fixture is accurate and convenient for placing the DBC. The visual camera 2 needs to adjust the position and angle so that the visual camera 2 can tilt and shoot the fixture number 11 on the side of the DBC fixture and the DBC frame in the topmost DBC fixture. In this way, the visual camera 2 can obtain two kinds of information at the same time, instead of the visual camera 2 only obtaining the DBC frame.

[0063] Correspondingly, see Figure 4 , a control method applied to the above device, comprising:

[0064] S10, the control module trains the image recognition model, wherein the image recognition model identifies the corresponding DBC welding standard and DBC position standard by acquiring the fixture number 11.

[0065] Specifically, training the image recognition model includes:

[0066] Obtain the DBC welding standard for each fixture number 11;

[0067] Associate fixture number 11 with the DBC welding standard;

[0068] Place the DBC in the groove of the DBC fixture 1 corresponding to each fixture number 11;

[0069] Use visual camera 2 to photograph the DBC position in DBC fixture 1 as the DBC position standard corresponding to fixture number 11, and associate fixture number 11 with the DBC position standard;

[0070] The DBC welding standard and DBC position standard are used as input, and the fixture number 11 is used as the label to train the image recognition model.

[0071] It should be understood that in practical applications, the DBC fixture 1 has multiple types. Different types of DBC fixtures 1 are used to place different DBCs. For example, three different sizes of DBCs correspond to three different DBC fixtures 1. When welding, the three different sizes of DBCs also correspond to different DBC welding standards. The DBC welding standard specifically refers to the welding position and welding content.

[0072] It should be noted that, since the visual camera 2 is shooting at an inclined angle, not vertically downward, the corresponding viewing angle of the visual camera 2 with an inclined angle is required as a standard.

[0073] The way to generate image recognition models is through neural network training.

[0074] S20, the visual camera 2 obtains the fixture number 11 on the sides of all DBC fixtures.

[0075] It should be understood that after the visual recognition module captures the fixture number 11 on the side of the DBC fixture, it sends it to the control module.

[0076] S30, the control module uses the image recognition model to identify the corresponding DBC welding standard according to the fixture number 11 of the uppermost DBC fixture and sends it to the welding assembly for welding.

[0077] S40, identifying the corresponding DBC position standard using an image recognition model.

[0078] S50, collecting the DBC outline frame in the uppermost DBC fixture in real time, analyzing whether the DBC position standard is met, if the DBC position standard is met, continuing, if the DBC position standard is met, stopping the adjustment.

[0079] It should be understood that this can monitor the DBC outline frame in real time, that is, whether the position of the real DBC is offset. If offset occurs, adjustment is required. In practical applications, the DBC can be put back into the corresponding groove using a robot.

[0080] S60, according to the fixture number 11, loading the DBC welding standards and DBC position standards of other DBC fixtures 1 except the uppermost DBC fixture.

[0081] In this way, the data of other DBC fixtures 1 can be loaded in advance, replacing the steps of only identifying and confirming the existing DBC type first and then loading the DBC welding standard and DBC position standard of the current DBC type in the prior art. Therefore, time can be saved and efficiency can be improved.

[0082] S70, after welding the top DBC fixture, the top DBC fixture is transferred to a subsequent process, and the other superimposed DBC fixtures 1 are lifted.

[0083] In actual application, S20 to S70 are repeated until the last DBC fixture 1 is transferred to the subsequent process. The DBC fixture 1 is sucked up as a whole by the suction nozzle of the blanking component and removed.

[0084] In a preferred embodiment, the DBC clamp 1 comprises: a liquid crystal screen and a transparent clamp housing, wherein the transparent clamp housing is arranged on the upper end surface and the side surface of the liquid crystal screen, the liquid crystal screen and the transparent clamp housing are detachably connected, wherein the upper end surface of the transparent clamp housing is provided with a groove adapted to the DBC. The material of the transparent clamp housing is transparent PVC.

[0085] The LCD screen and the transparent fixture housing can be connected and disassembled by snap fasteners.

[0086] In the corresponding method, the DBC outline frame in the uppermost DBC fixture is collected in real time to analyze whether the DBC position standard is the same, including:

[0087] Send the DBC position standard to the LCD screen of the uppermost DBC fixture;

[0088] The LCD screen displays a virtual box corresponding to the position of the DBC;

[0089] The virtual box is used as a reference to compare and analyze whether the DBC outline border meets the DBC position standard.

[0090] It should be understood that the LCD screen is a human-computer interaction module that can display content according to instructions. Therefore, the LCD screen can directly display the virtual box through preset instructions. In actual applications, the background of the LCD screen can be black, and the virtual box is a highlighted white area. The control module can directly use the white area as a reference to identify whether the DBC outline frame has deviated from the DBC position standard. For example, when the DBC outline frame completely covers the white area, it means that the DBC is currently in the DBC position standard, and when the visual camera 2 recognizes the exposed white area, it means that the DBC is not currently in the DBC position standard and needs to be adjusted.

[0091] It should be noted that the LCD screen and the transparent fixture shell have a certain thickness, and the virtual box displayed on the LCD screen is for identification and observation from the perspective of the visual camera 2. Therefore, when the DBC is in the standard DBC position, it meets the standard from the perspective of the visual camera 2, but at other angles, such as vertical angle looking down, the virtual box and the DBC outline frame do not meet the standard.

[0092] Furthermore, the control method further includes: if it is identified that the virtual box does not overlap with the DBC outline frame, the LCD screen issues an alarm.

[0093] In another embodiment, the control method further includes: obtaining a profile of an upper end surface of the uppermost DBC fixture:

[0094] The contour of the upper end face of the uppermost DBC fixture is used as a reference to compare and analyze whether the DBC contour frame meets the DBC position standard.

[0095] It should be understood that the visual camera 2 first identifies the contour of the upper end surface of the uppermost DBC fixture. Since it is a rectangular structure, it can be used as a reference coordinate axis to identify the position of the DBC contour frame.

[0096] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process and other changes. The embodiments represent only possible changes. Unless explicitly required, separate components and functions are optional, and the order of operations may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. Moreover, the words used in this application are only used to describe the embodiments and are not used to limit the claims. As used in the description of the embodiments and the claims, unless the context clearly indicates, the singular forms of "a", "an" and "the" are intended to include plural forms as well. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of one or more associated listings. In addition, when used in this application, the term "comprise" and its variants "comprises" and / or comprising refer to the presence of stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups thereof. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the presence of other identical elements in the process, method or device including the elements. In this article, each embodiment may focus on the differences from other embodiments, and the same and similar parts between the embodiments may refer to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, then the relevant parts can refer to the description of the method part.

[0097] Those skilled in the art will appreciate that the examples and algorithm steps described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software may depend on the specific application and design constraints of the technical solution. The technicians may use different methods for each specific application to implement the described functions, but such implementations should not be considered to exceed the scope of the embodiments of the present disclosure. The technicians may clearly understand that, for the convenience and simplicity of description, the specific working processes of the above-described devices, apparatuses and can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here.

[0098] The flowchart and block diagram in the accompanying drawings show the possible architecture, functions and operations of the device, method and computer program product according to the embodiment of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of the code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. In some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. In the description corresponding to the flowchart and the block diagram in the accompanying drawings, the operations or steps corresponding to different boxes can also occur in an order different from that disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented by dedicated hardware-based devices that perform the specified functions or actions, or may be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A DBC pre-welding auxiliary control method, characterized in that: Applicable to a DBC pre-welding auxiliary device, the DBC pre-welding auxiliary device comprises: A plurality of DBC fixtures are formed into a plate structure, the upper end surface of the plate structure has a groove adapted to the DBC, and the side surface is provided with a fixture number, and the DBC fixture comprises: a liquid crystal screen and a transparent fixture shell, wherein the transparent fixture shell is arranged on the upper end surface and the side surface of the liquid crystal screen, and the liquid crystal screen and the transparent fixture shell are detachably connected, wherein the upper end surface of the transparent fixture shell is provided with a groove adapted to the DBC; A visual camera is used to obliquely photograph the DBC fixture of the plate structure, identify the side fixture number of the plate structure, and collect the DBC frame in the top DBC fixture in real time; Lifting assembly, used to lift the DBC fixture; Welding assembly, used for welding DBC; Unloading assembly, used to transfer the welded DBC fixture to the subsequent process; A control module is connected to the visual camera, the lifting assembly and the welding structure respectively, and is used to control the operation of the visual camera, the lifting assembly and the welding structure; The control method comprises: Training an image recognition model, wherein the image recognition model identifies the corresponding DBC welding standard and DBC position standard by obtaining the fixture label; Get the fixture number of all DBC fixture sides; According to the fixture number of the top DBC fixture, the corresponding DBC welding standard is identified by the image recognition model and sent to the welding assembly for welding; Using the image recognition model to identify the corresponding DBC position standard; Collect the DBC outline frame in the uppermost DBC fixture in real time to analyze whether the DBC position standard is met. If yes, continue; if no, stop adjusting. According to the fixture number, load the DBC welding standard and DBC position standard of other DBC fixtures except the top DBC fixture; After welding the top DBC fixture, transfer the top DBC fixture to the subsequent process and lift the other superimposed DBC fixtures; Real-time acquisition of the DBC outline frame in the uppermost DBC fixture to analyze whether the DBC position standard is the same, including: sending the DBC position standard to the LCD screen of the uppermost DBC fixture; the LCD screen displays a virtual box corresponding to the DBC position; using the virtual box as a reference to compare and analyze whether the DBC outline frame meets the DBC position standard; Training an image recognition model includes: obtaining a DBC welding standard for each fixture number; associating the fixture number with the DBC welding standard; placing a DBC in a groove in a DBC fixture corresponding to each fixture number; using a visual camera to photograph a DBC position in the DBC fixture as a DBC position standard corresponding to the fixture number, and associating the fixture number with the DBC position standard; and using the DBC welding standard and the DBC position standard as inputs and the fixture number as a label to train the image recognition model.

2. The DBC pre-welding auxiliary control method according to claim 1, characterized in that: The control method further includes: if it is identified that the virtual box does not overlap with the DBC outline frame, the LCD screen issues an alarm.

3. The DBC pre-welding auxiliary control method according to claim 1, characterized in that: The control method further includes: obtaining a profile of an upper end surface of the uppermost DBC fixture: The contour of the upper end surface of the uppermost DBC fixture is used as a reference to compare and analyze whether the DBC contour frame meets the DBC position standard.

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