A pre-positioning device and control method for automobile parts before welding

Abstract

The present invention relates to a pre-positioning device and control method for automobile parts before welding. The pre-positioning device is used to pre-position frame-type parts of different sizes, and the frame-type parts include a first component and a second component. The pre-positioning device includes a mobile platform, a first positioning component, and a second positioning component. The two mobile platforms can move back and forth along a first direction, and two groups of first positioning components are respectively arranged on the corresponding mobile platforms. At least one group of second positioning components is arranged on the mobile platform, and each group of second positioning components has two, and each group of two second positioning components is arranged corresponding to the two second components. The fixed plates of each group of two second positioning components cooperate to drive the corresponding second components to adjust their positions so as to position the frame-type parts as a whole in the second direction. The two mobile platforms cooperate to drive the corresponding first components to adjust their positions so as to position the frame-type parts as a whole in the first direction.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile manufacturing, and in particular to a pre-positioning device and a control method for automobile parts before welding. Background Art

[0002] With the development of the automotive industry, sunroofs have become a vital component of modern vehicles, and their manufacturing quality directly impacts vehicle performance. During the sunroof frame production process, pre-positioning the frame is often necessary to ensure accurate assembly of components during the welding process. The primary purpose of pre-positioning is to adjust and secure the spatial position of frame components, ensuring accurate relative positioning and preventing subsequent misalignment during welding that could affect weld quality and structural stability.

[0003] In the existing technology, the pre-positioning of the skylight frame mainly relies on manual operation, which has obvious shortcomings: first, the positioning accuracy is difficult to guarantee, and the welding quality is easily reduced due to human error; second, the operation is time-consuming and the production efficiency is low, which makes it difficult to meet the needs of efficient assembly; third, the consistency is poor, and the positioning effects of different batches may deviate; fourth, the labor intensity is high, and worker fatigue further affects efficiency and accuracy. Summary of the Invention

[0004] The purpose of the present invention is to provide a pre-positioning device and control method for automobile parts before welding. By designing a mobile platform, a first positioning component and a second positioning component to cooperate with each other, the device can achieve overall precise positioning of the frame-type parts in the first direction and the second direction, greatly improve the positioning accuracy, and avoid errors caused by manual operation; by replacing manual adjustment with automated operation, the production efficiency can be significantly improved and the labor intensity can be reduced; by utilizing the mechanical cooperation of the limit plate and the positioning pin, the consistency of the positioning process can be ensured and the stability of product quality can be improved; at the same time, the device has flexible adjustment capabilities and can adapt to frame-type parts of different sizes, further enhancing the versatility of the device.

[0005] To achieve the above-mentioned object, according to a first aspect of the present invention, a pre-positioning device for automobile parts before tailor welding is provided, wherein the pre-positioning device is used to pre-position frame-shaped parts of different sizes, wherein the frame-shaped parts include two first components and two second components disposed between the two first components, and the pre-positioning device includes:

[0006] Two movable platforms, capable of reciprocating along a first direction;

[0007] Two sets of first positioning components are respectively arranged on the corresponding mobile platforms, and the first positioning components include:

[0008] A carrying plate is reciprocatingly movable along the second direction, wherein a positioning plate is provided on the carrying plate, and the carrying plates of each group of two first positioning assemblies cooperate to drive the corresponding positioning plates to adjust positions so as to clamp and position the first component in the second direction;

[0009] a first limiting plate, disposed on the supporting plate and capable of reciprocating along a first direction;

[0010] a first positioning pin, disposed on the carrier plate and located between the first component and the second component, wherein the first limiting plate cooperates with the first positioning pin to clamp and position the first component in a first direction;

[0011] At least one set of second positioning components is provided on the mobile platform, each set of the second positioning components has two, and each set of two second positioning components is provided correspondingly to the two second components, and the second positioning components include:

[0012] a fixed plate, movable back and forth along a second direction;

[0013] a second limiting plate, disposed on the fixed plate and capable of reciprocating along a second direction;

[0014] A second positioning pin is provided on the fixing plate, the second limiting plate cooperates with the second positioning pin to clamp and position the second component in the second direction, and the fixing plates of each group of two second positioning assemblies cooperate to drive the corresponding second components to adjust their positions to position the frame-shaped part as a whole in the second direction;

[0015] The two mobile platforms cooperate to drive the corresponding first positioning pins to adjust positions to clamp and position the second component in the first direction, and at the same time drive the corresponding first component to adjust positions to position the frame-shaped part as a whole in the first direction.

[0016] Optionally, the mobile platform is driven by a first screw transmission assembly, and the first screw transmission assembly includes:

[0017] First motor;

[0018] a first lead screw, arranged along a first direction and connected to a movable end of the first motor;

[0019] A first nut is disposed below the movable platform and is rotationally connected to the first lead screw.

[0020] Optionally, there are two first positioning assemblies in each group, and each group of two first positioning assemblies is respectively arranged at both ends of the mobile platform, a second motor is provided on the mobile platform, a steering gearbox is provided at the movable end of the second motor, and second screw transmission assemblies are correspondingly provided on both sides of the steering gearbox, and the second screw transmission assembly is connected to the corresponding supporting plate.

[0021] Optionally, a first cylinder is provided on the supporting plate, and a movable end of the first cylinder is connected to the first limiting plate and is used to drive the first limiting plate to move back and forth along the first direction.

[0022] Optionally, a linear motor is provided on the movable platform, and the linear motor is used to drive the fixed plate to move back and forth along the second direction.

[0023] Optionally, a second cylinder is provided on the fixed plate, and a movable end of the second cylinder is connected to the second limiting plate and is used to drive the second limiting plate to move back and forth along the second direction.

[0024] Optionally, the fixing plate is provided with a plurality of rows of fixing holes along the length direction, and the second cylinder is detachably connected to the fixing plate through the fixing holes.

[0025] According to a second aspect of the present invention, a method for controlling a pre-positioning device for automobile parts before tailor welding is provided, comprising the following steps:

[0026] Controlling the first positioning assembly to clamp and position the first component in a first direction and a second direction;

[0027] Controlling the mobile platform to cooperate with the second positioning assembly to clamp and position the second component in the first direction and the second direction;

[0028] Controlling the first screw transmission assembly of the pre-positioning device to drive the movable platform to move and adjust the position of the first component, so as to position the frame-shaped part as a whole in a first direction;

[0029] The linear motor controlling the pre-positioning device drives the fixing plates of each group of two second positioning assemblies to move and adjust the positions of the corresponding second components, so as to position the frame-shaped part as a whole in the second direction.

[0030] Optionally, controlling the first positioning assembly to clamp and position the first component in the first direction and the second direction includes the following steps:

[0031] Controlling the first cylinder of the pre-positioning device to drive the first limiting plate to move, so that the first limiting plate cooperates with the first positioning pin to clamp and position the first component in a first direction;

[0032] The second motor, steering gearbox and second screw transmission assembly of the pre-positioning device cooperate to drive the supporting plates of each group of two first positioning assemblies to move and adjust the corresponding positioning plate positions to clamp and position the first component in the second direction.

[0033] Optionally, the mobile platform cooperates with the second positioning assembly to clamp and position the second component in the first direction and the second direction, comprising the following steps:

[0034] Controlling the first screw transmission assembly of the pre-positioning device to drive the movable platform to move and adjust the position of the first positioning pin to clamp and position the second component in a first direction;

[0035] The second cylinder of the pre-positioning device is controlled to drive the second limiting plate to move, so that the second limiting plate cooperates with the second positioning pin to clamp and position the second component in the second direction.

[0036] The beneficial effects of the present invention are: by designing a mobile platform, a first positioning component and a second positioning component to cooperate with each other, the overall precise positioning of the frame-type part in the first direction and the second direction can be achieved, the positioning accuracy can be greatly improved, and errors caused by manual operation can be avoided; by replacing manual adjustment with automated operation, production efficiency can be significantly improved and labor intensity can be reduced; by utilizing the mechanical coordination of the limit plate and the positioning pin, the consistency of the positioning process can be ensured and the stability of product quality can be improved; at the same time, the device has flexible adjustment capabilities and can adapt to frame-type parts of different sizes, further enhancing the versatility of the device; in addition, only through the movement and adjustment of the mobile platform, the positioning of the second component and the frame-type part as a whole in the first direction can be achieved simultaneously, which can simplify the device structure and save the manufacturing cost of the device.

[0037] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a schematic structural plan view of a pre-positioning device for automobile parts before tailor welding according to one embodiment of the present invention;

[0039] Figure 2 This is a schematic structural perspective view of a pre-positioning device for automobile parts before tailor welding according to one embodiment of the present invention;

[0040] Figure 3 This is a schematic structural partial diagram of a pre-positioning device for automobile parts before tailor welding according to one embodiment of the present invention;

[0041] Figure 4This is a schematic structural view of a pre-positioning device for automobile parts before welding according to one embodiment of the present invention;

[0042] Figure 5 This is a schematic flow chart of a control method for a pre-positioning device for automobile parts before tailor welding, according to one embodiment of the present invention;

[0043] Figure 6 for Figure 5 Schematic flow chart of step S10;

[0044] Figure 7 for Figure 5 Schematic flow chart of step S20;

[0045] In the figure: 1. frame-type part; 11. first component; 12. second component; 2. moving platform; 21. second motor; 22. steering gearbox; 23. second screw transmission assembly; 24. linear motor; 3. first positioning assembly; 31. load-bearing plate; 311. positioning plate; 312. first cylinder; 32. first limit plate; 33. first positioning pin; 4. second positioning assembly; 41. fixing plate; 411. second cylinder; 412. fixing hole; 42. second limit plate; 43. second positioning pin; 5. mounting base; 51. first screw transmission assembly; 511. first motor; 512. first screw; 513. first nut; 52. slide rail. DETAILED DESCRIPTION

[0046] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0047] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0048] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0049] See Figures 1 to 3 A preferred embodiment of the present application shows a pre-positioning device for automobile parts before welding. The pre-positioning device is used to pre-position frame-type parts 1 of different sizes. The frame-type part 1 includes two first components 11 and two second components 12 arranged between the two first components 11. The pre-positioning device includes a mobile platform 2, a first positioning component 3 and a second positioning component 4. The two mobile platforms 2 can move back and forth along the first direction, and the two groups of first positioning components 3 are respectively arranged on the corresponding mobile platforms 2. The first positioning component 3 includes a bearing plate 31, a first limiting plate 32 and a first positioning pin 33. The bearing plate 31 can move back and forth along the second direction. A positioning plate 311 is provided on the bearing plate 31. The bearing plates 31 of each group of two first positioning components 3 cooperate to drive the corresponding positioning plate 311 to adjust the position so as to clamp and position the first component 11 in the second direction. The first limiting plate 32 is provided on the bearing plate 31 and can move back and forth along the first direction. The first positioning pin 33 is set on the supporting plate 31 and is located between the first component 11 and the second component 12. The first limiting plate 32 cooperates with the first positioning pin 33 to clamp and position the first component 11 in the first direction. At least one group of second positioning components 4 is set on the mobile platform 2, and each group of second positioning components 4 has two, and each group of two second positioning components 4 is corresponding to the two second components 12. The second positioning component 4 includes a fixed plate 41, a second limiting plate 42 and a second positioning pin 43. The fixed plate 41 can move back and forth in the second direction. The second limiting plate 42 is set on the fixed plate 41 and can move back and forth in the second direction. The second positioning pin 43 is set on the fixed plate 41. The second limiting plate 42 cooperates with the second positioning pin 43 to clamp and position the second component 12 in the second direction. The fixed plates 41 of each group of two second positioning components 4 cooperate to drive the corresponding second components 12 to adjust their positions to position the frame-type part 1 as a whole in the second direction. The two movable platforms 2 cooperate to drive the corresponding first positioning pins 33 to adjust positions to clamp and position the second component 12 in the first direction, and simultaneously drive the corresponding first component 11 to adjust positions to position the frame-shaped part 1 as a whole in the first direction.

[0050] According to the solution of the embodiment of the present invention, by designing the mobile platform 2, the first positioning assembly 3, and the second positioning assembly 4 to cooperate with each other, the frame-shaped part 1 can be precisely positioned in the first and second directions as a whole, while also enabling the individual positioning of the first component 11 and the second component 12. This significantly improves positioning accuracy and avoids errors caused by manual operation. By replacing manual adjustments with automated operations, production efficiency can be significantly improved and labor intensity can be reduced. The mechanical coordination of the limit plate and the positioning pin ensures consistency in the positioning process, improving the stability of product quality. Furthermore, the device offers flexible adjustment capabilities, adapting to frame-shaped parts 1 of varying sizes, further enhancing its versatility. It is important to emphasize that the present device first clamps and positions the individual first and second components 11, 12, and then adjusts their relative positions to achieve overall positioning of the frame-shaped part 1. Furthermore, the positioning of the second component 12 and the entire frame-shaped part 1 in the first direction can be achieved simultaneously through the movement and adjustment of the mobile platform 2, simplifying the device structure and reducing manufacturing costs.

[0051] The following is a detailed description with specific embodiments:

[0052] See Figures 2 to 4 The pre-positioning device also includes a mounting base 5. The mobile platform 2 is driven by a first screw 512 transmission assembly 51, which includes a first motor 511, a first screw 512, and a first nut 513. The first motor 511 is mounted on the mounting base 5. The first screw 512 is arranged along the first direction and is connected to the movable end of the first motor 511. The first nut 513 is disposed below the mobile platform 2 and is rotationally connected to the first screw 512. A slide rail 52 is provided between the mobile platform 2 and the mounting base 5. The first screw 512 drives the mobile platform 2 to move back and forth along the slide rail 52 in the first direction, thereby adjusting the position of the first component 11 and the first positioning pin 33, thereby achieving the positioning of the second component 12 and the frame-shaped part 1 as a whole in the first direction.

[0053] See Figure 2In this embodiment, each set of first positioning assemblies 3 comprises two, each set of two first positioning assemblies 3 being disposed at either end of the mobile platform 2. A second motor 21 is disposed on the mobile platform 2, and a steering gearbox 22 is disposed at the movable end of the second motor 21. Second screw drive assemblies 23 are disposed on either side of the steering gearbox 22, and the second screw drive assemblies 23 are connected to corresponding supporting plates 31. The second motor 21 cooperates with the steering gearbox 22 to simultaneously control the synchronous movement of the two second screw drive assemblies 23, thereby driving the synchronous movement of the two supporting plates 31, thereby causing the positioning plate 311 to clamp and position the first component 11 in the second direction. Specifically, the structural composition of the second screw drive assembly 23 is the same as that of the first screw 512 drive assembly 51, and will not be further elaborated here.

[0054] See Figure 3 The carrier plate 31 is provided with a first cylinder 312. The movable end of the first cylinder 312 is connected to the first limiting plate 32 and is used to drive the first limiting plate 32 to move back and forth in a first direction. The first cylinder 312 drives the first limiting plate 32 to move, thereby cooperating with the first positioning pin 33 to clamp and position first components 11 of different sizes.

[0055] See Figure 2 In this embodiment, two sets of second positioning assemblies 4 are provided, one on each of the two mobile platforms 2. A linear motor 24 is provided on each of the mobile platforms 2, which is used to drive a fixed plate 41 to reciprocate along the second direction. The linear motor 24 drives the fixed plate 41, which in turn drives the second component 12 thereon to adjust its position (i.e., adjusting the position of the frame-shaped component 1 in the second direction for overall positioning).

[0056] See Figure 3 The fixed plate 41 is provided with a second cylinder 411. The movable end of the second cylinder 411 is connected to the second limiting plate 42 and is used to drive the second limiting plate 42 to move back and forth in the second direction. Similarly, the second cylinder 411 drives the second limiting plate 42 to move, thereby cooperating with the second positioning pin 43 to clamp and position second components 12 of different sizes.

[0057] See Figure 3 The fixing plate 41 has several rows of fixing holes 412 along its length, and the second cylinder 411 is detachably connected to the fixing plate 41 through the fixing holes 412. Since the second cylinder 411 has a limited travel range, if the sizes of different second components 12 vary significantly and the travel range of the second cylinder 411 cannot meet the requirements, the second components 12 of different sizes can be positioned by changing the installation position of the second cylinder 411 on the fixing plate 41.

[0058] See Figure 5The embodiment of the present invention further provides a control method for a pre-positioning device for automobile parts before welding, comprising the following steps:

[0059] Step S10: controlling the first positioning assembly 3 to clamp and position the first component 11 in the first direction and the second direction;

[0060] Step S20: controlling the mobile platform 2 to cooperate with the second positioning assembly 4 to clamp and position the second component 12 in the first direction and the second direction;

[0061] Step S30: Controlling the first screw 512 transmission assembly 51 of the pre-positioning device to drive the movable platform 2 to move and adjust the position of the first component 11, so as to position the frame-shaped part 1 as a whole in the first direction;

[0062] Step S40 : Control the linear motor 24 of the pre-positioning device to drive the fixing plates 41 of each set of two second positioning assemblies 4 to move and adjust the positions of the corresponding second components 12 , so as to position the frame-shaped part 1 as a whole in the second direction.

[0063] See Figure 6 , step S10 includes the following steps:

[0064] Step S101: controlling the first cylinder 312 of the pre-positioning device to drive the first limiting plate 32 to move, so that the first limiting plate 32 cooperates with the first positioning pin 33 to clamp and position the first component 11 in a first direction;

[0065] Step S102: Control the second motor 21, steering gearbox 22 and second screw transmission assembly 23 of the pre-positioning device to cooperate to drive the supporting plates 31 of each group of two first positioning assemblies 3 to move and adjust the position of the corresponding positioning plates 311 to clamp and position the first component 11 in the second direction.

[0066] See Figure 7 , step S20 includes the following steps:

[0067] Step S201: Controlling the first screw 512 transmission assembly 51 of the pre-positioning device to drive the movable platform 2 to move and adjust the position of the first positioning pin 33 to clamp and position the second component 12 in the first direction;

[0068] Step S202 : controlling the second cylinder 411 of the pre-positioning device to drive the second limiting plate 42 to move, so that the second limiting plate 42 cooperates with the second positioning pin 43 to clamp and position the second component 12 in the second direction.

[0069] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0070] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A pre-positioning device for automobile parts before welding, characterized in that: The pre-positioning device is used to pre-position frame-shaped parts of different sizes, wherein the frame-shaped parts include two first components and two second components arranged between the two first components. The pre-positioning device includes: Two movable platforms, capable of reciprocating along a first direction; Two sets of first positioning components are respectively arranged on the corresponding mobile platforms, and the first positioning components include: A carrying plate is reciprocatingly movable along the second direction, wherein a positioning plate is provided on the carrying plate, and the carrying plates of each group of two first positioning assemblies cooperate to drive the corresponding positioning plates to adjust positions so as to clamp and position the first component in the second direction; a first limiting plate, disposed on the supporting plate and capable of reciprocating along a first direction; a first positioning pin, disposed on the carrier plate and located between the first component and the second component, wherein the first limiting plate cooperates with the first positioning pin to clamp and position the first component in a first direction; At least one set of second positioning components is provided on the mobile platform, each set of the second positioning components has two, and each set of two second positioning components is provided correspondingly to the two second components, and the second positioning components include: a fixed plate, movable back and forth along a second direction; a second limiting plate, disposed on the fixed plate and capable of reciprocating along a second direction; A second positioning pin is provided on the fixing plate, the second limiting plate cooperates with the second positioning pin to clamp and position the second component in the second direction, and the fixing plates of each group of two second positioning assemblies cooperate to drive the corresponding second components to adjust their positions to position the frame-shaped part as a whole in the second direction; The two mobile platforms cooperate to drive the corresponding first positioning pins to adjust positions to clamp and position the second component in the first direction, and at the same time drive the corresponding first component to adjust positions to position the frame-shaped part as a whole in the first direction.

2. The pre-positioning device for automobile parts before tailor welding according to claim 1, characterized in that: The mobile platform is driven by a first screw transmission assembly, which includes: First motor; a first lead screw, arranged along a first direction and connected to a movable end of the first motor; A first nut is disposed below the movable platform and is rotationally connected to the first lead screw.

3. The pre-positioning device for automobile parts before tailor welding according to claim 2, characterized in that: There are two first positioning assemblies in each group, and each group of two first positioning assemblies is respectively arranged at both ends of the mobile platform. A second motor is arranged on the mobile platform, and a steering gear box is arranged at the movable end of the second motor. Second screw transmission assemblies are correspondingly arranged on both sides of the steering gear box, and the second screw transmission assembly is connected to the corresponding supporting plate.

4. The pre-positioning device for automobile parts before tailor welding according to claim 3 is characterized in that: A first cylinder is provided on the supporting plate, and a movable end of the first cylinder is connected to the first limiting plate and is used for driving the first limiting plate to move back and forth along a first direction.

5. The pre-positioning device for automobile parts before tailor welding according to claim 4, characterized in that: A linear motor is provided on the movable platform, and the linear motor is used to drive the fixed plate to move back and forth along the second direction.

6. The pre-positioning device for automobile parts before tailor welding according to claim 5, characterized in that: A second cylinder is provided on the fixed plate, and a movable end of the second cylinder is connected to the second limiting plate and is used for driving the second limiting plate to move back and forth along the second direction.

7. The pre-positioning device for automobile parts before tailor welding according to claim 6, characterized in that: The fixing plate is provided with a plurality of rows of fixing holes along the length direction, and the second cylinder is detachably connected to the fixing plate through the fixing holes.

8. A control method for the pre-positioning device for automobile parts before tailor welding according to claim 7, characterized in that: The steps include: Controlling the first positioning assembly to clamp and position the first component in a first direction and a second direction; Controlling the mobile platform to cooperate with the second positioning assembly to clamp and position the second component in the first direction and the second direction; Controlling the first screw transmission assembly of the pre-positioning device to drive the movable platform to move and adjust the position of the first component, so as to position the frame-shaped part as a whole in a first direction; The linear motor controlling the pre-positioning device drives the fixing plates of each group of two second positioning assemblies to move and adjust the positions of the corresponding second components, so as to position the frame-shaped part as a whole in the second direction.

9. The control method of the pre-positioning device for automobile parts before tailor welding according to claim 8, characterized in that: Controlling the first positioning assembly to clamp and position the first component in the first direction and the second direction includes the following steps: Controlling the first cylinder of the pre-positioning device to drive the first limiting plate to move, so that the first limiting plate cooperates with the first positioning pin to clamp and position the first component in a first direction; The second motor, steering gearbox and second screw transmission assembly of the pre-positioning device cooperate to drive the supporting plates of each group of two first positioning assemblies to move and adjust the corresponding positioning plate positions to clamp and position the first component in the second direction.

10. The control method of the pre-positioning device for automobile parts before tailor welding according to claim 8, characterized in that: The mobile platform cooperates with the second positioning assembly to clamp and position the second component in the first direction and the second direction, including the following steps: Controlling the first screw transmission assembly of the pre-positioning device to drive the movable platform to move and adjust the position of the first positioning pin to clamp and position the second component in a first direction; The second cylinder of the pre-positioning device is controlled to drive the second limiting plate to move, so that the second limiting plate cooperates with the second positioning pin to clamp and position the second component in the second direction.

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