A welding fixture for automated argon arc welding of automotive parts

Abstract

This invention relates to the field of welding fixture technology, specifically to a welding fixture for automated argon arc welding of automotive parts, comprising a clamping base; clamping assemblies are provided at both ends of the clamping base; the clamping assembly includes a sliding seat slidably disposed on the clamping base along the X-axis direction, a driving block slidably disposed on the sliding seat along the Y-axis direction, and a first clamping block telescopically movably disposed on one side of the sliding seat along the X-axis direction. This invention, by changing the pressure applied to the magnetorheological fluid, makes the first flexible contact head less prone to deformation and the second flexible contact head more prone to deformation, thereby ensuring the stability of the connection between the first flexible contact head and the constriction region, and effectively reducing the pressure applied to the flared region by the second flexible contact head, preventing damage to the flared region.

Description

Technical Field

[0001] This invention relates to the field of welding fixture technology, and more specifically to a welding fixture for automated argon arc welding of automotive parts. Background Technology

[0002] In modern manufacturing, stretch forming is widely used in precision manufacturing fields such as automobile manufacturing due to its ability to efficiently produce complex curved surface parts. However, stretch-formed parts have unique mechanical distribution characteristics due to their unique forming process, which brings significant and insurmountable challenges to subsequent welding and clamping processes.

[0003] by Figure 1 Taking a typical stretch-formed workpiece as an example, this workpiece typically includes two key structural parts: a necking region 12 and a flaring region 11. Such workpieces exhibit distinct differences in mechanical properties: the flaring region 11, due to significant material elongation during the stretching process, has relatively poor overall structural strength and weak resistance to deformation; while the necking region 12, due to the strong compression during forming, forms a denser structure, resulting in greater strength and the ability to withstand higher external forces. In current production practice, traditional welding fixtures generally employ a single, fixed clamping structure. The core flaw of this design is that the magnitude and mode of clamping force are preset and cannot be adjusted, failing to dynamically adapt to the mechanical properties of different shaped areas or parts of the workpiece. Specifically, when clamping a workpiece containing both a necking region 12 and a flaring region 11, traditional fixtures cannot reduce the clamping force to accommodate the low strength of the flaring region 11, nor can they increase the clamping force to meet the high strength requirements of the necking region 12.

[0004] This technical limitation directly leads to a series of significant quality defects during the welding process: for the flared area 11, the clamping force exceeds its limit, which easily causes plastic deformation of the material, resulting in problems such as dents, wrinkles or abnormal dimensions on the workpiece surface; while the narrowed area 12, due to insufficient clamping force, is easily affected by welding stress, thermal deformation and other factors during the welding process, resulting in displacement deviation, causing the originally precise assembly position to shift.

[0005] These quality defects ultimately lead to dimensional inaccuracies in welding, making it impossible for workpieces to meet the assembly tolerances required by the design. As the automotive manufacturing industry places increasingly higher demands on product quality and performance, especially in the welding of critical parts such as body structures and chassis components, the requirements for high-precision welding standards are becoming increasingly stringent. The problems of decreased yield and reduced production efficiency caused by traditional welding fixtures have become bottlenecks restricting the industry's development and are difficult to adapt to the high-precision production needs of modern automobile manufacturing. Summary of the Invention

[0006] The purpose of this invention is to address the aforementioned shortcomings in the prior art by providing a welding fixture for automated argon arc welding of automotive parts.

[0007] The objective of this invention is achieved through the following technical solution: a welding fixture for automated argon arc welding of automotive parts, comprising a clamping base; both ends of the clamping base are provided with clamping components;

[0008] The clamping assembly includes a sliding seat that is slidably disposed on the clamping seat along the X-axis direction, a driving block that is slidably disposed on the sliding seat along the Y-axis direction, and a first clamping block that is telescopically movably disposed on one side of the sliding seat along the X-axis direction.

[0009] The first clamping block has a first sealing cavity; a first piston plate is movably and sealingly disposed within the first sealing cavity; one end of the first clamping block has a first flexible contact head communicating with one end of the first sealing cavity; the other end of the first clamping block has a first push rod; the first push rod is movably and telescopically disposed at the other end of the first sealing cavity; a first spring is disposed between the first push rod and the first piston plate; magnetorheological fluid is disposed between the first flexible contact head and one end of the first sealing cavity.

[0010] A first linkage component is provided between the drive block and the first clamping block; a first transformer component is provided between the drive block and the first push rod.

[0011] The present invention is further configured such that the first linkage component includes a first linkage groove disposed on one side of the drive block and a first linkage pin disposed on the other end of the first clamping block; the first linkage pin is movably disposed in the first linkage groove.

[0012] The present invention is further configured such that the first transformer assembly includes a first transformer groove disposed on one side of the drive block and a first transformer pin disposed on the first push rod; the first transformer pin is movably disposed in the first transformer groove; the slope of the first transformer groove is greater than the slope of the first linkage groove.

[0013] The present invention is further configured such that the clamping assembly further includes a second clamping block that is telescopically movably disposed on the other side of the sliding seat along the X-axis direction;

[0014] The second clamping block has a second sealing cavity; a second piston plate is movably and sealingly disposed within the second sealing cavity; one end of the second clamping block has a second flexible contact head communicating with one end of the second sealing cavity; the other end of the second clamping block has a second push rod; the second push rod is movably and telescopically disposed at the other end of the second sealing cavity; a second spring is disposed between the second push rod and the second piston plate; magnetorheological fluid is disposed between the second flexible contact head and one end of the second sealing cavity.

[0015] A second linkage component is provided between the drive block and the second clamping block; a second transformer component is provided between the drive block and the second push rod.

[0016] The present invention is further configured such that the second linkage component includes a second linkage groove disposed on the other side of the drive block and a second linkage pin disposed on the other end of the second clamping block; the second linkage pin is movably disposed in the second linkage groove.

[0017] The present invention is further configured such that the second transformer assembly includes a second transformer sloping groove disposed on the other side of the drive block and a second transformer pin disposed on the second push rod; the second transformer pin is movably disposed in the second transformer sloping groove; the slope of the second transformer sloping groove is greater than the slope of the second linkage sloping groove.

[0018] The present invention is further configured such that a positioning block is provided in the middle of the sliding seat; and a tension spring is provided between the positioning block and the middle of the driving block.

[0019] The invention is further configured such that the clamping seat is rotatably provided with a screw along the X-axis; the two ends of the screw are respectively provided with a first thread and a second thread; the rotation direction of the first thread is opposite to that of the second thread; the clamping seat is provided with a clamping motor; the output end of the clamping motor is connected to the screw; the sliding seats of the clamping components at both ends of the clamping seat are respectively threadedly connected to the first thread and the second thread.

[0020] The present invention is further configured such that the welding fixture for automated argon arc welding of automotive parts also includes a base; both ends of the base are provided with clamping seats; the two clamping seats are arranged facing each other.

[0021] The drive block is provided with a limiting groove along the Y-axis; the sliding seat is provided with a limiting pin; the limiting pin is movably disposed in the limiting groove.

[0022] The present invention is further configured such that the base is provided with a rotary motor; the output end of the rotary motor is connected to the clamping seat.

[0023] The beneficial effects of the present invention are as follows: By changing the pressure applied to the magnetorheological fluid, the present invention makes the first flexible contact head less prone to deformation and the second flexible contact head more prone to deformation, thereby ensuring the stability of the connection between the first flexible contact head and the constriction area, and effectively reducing the pressure applied to the flared area by the second flexible contact head, thus preventing damage to the flared area. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the workpiece's structure;

[0025] Figure 2 This is a schematic diagram of the structure of the present invention in conjunction with the workpiece;

[0026] Figure 3This is a schematic diagram of the structure of the clamping seat and the workpiece of the present invention;

[0027] Figure 4 This is a schematic diagram of the structure of the clamping base of the present invention;

[0028] Figure 5 This is a cross-sectional view of the clamping base of the present invention;

[0029] Figure 6 This is a diagram showing the internal structure of the clamping base of the present invention;

[0030] Figure 7 This is a cross-sectional view of the clamping base of the present invention from another perspective;

[0031] The components are as follows: 11. Flared area; 12. Narrowed area; 2. Base; 21. Rotary motor; 3. Clamping seat; 31. Screw; 32. Clamping motor; 4. Sliding seat; 41. Positioning block; 42. Tension spring; 43. Limiting pin; 5. Drive block; 51. First linkage groove; 52. First pressure-changing groove; 53. Second linkage groove; 54. Second pressure-changing groove; 55. Limiting groove; 6. First clamping block; 61. First sealing cavity; 62. First piston plate; 63. First flexible contact head; 64. First push rod; 65. First spring; 66. First linkage pin; 67. First pressure-changing pin; 7. Second clamping block; 71. Second sealing cavity; 72. Second piston plate; 73. Second flexible contact head; 74. Second push rod; 75. Second spring; 76. Second linkage pin; 77. Second pressure-changing pin. Detailed Implementation

[0032] The present invention will be further described in conjunction with the following embodiments.

[0033] Depend on Figures 2 to 7As can be seen, the welding fixture for automated argon arc welding of automotive parts described in this embodiment includes a clamping seat 3; both ends of the clamping seat 3 are provided with clamping assemblies; the clamping assembly includes a sliding seat 4 slidably disposed on the clamping seat 3 along the X-axis direction, a driving block 5 slidably disposed on the sliding seat 4 along the Y-axis direction, and a first clamping block 6 telescopically disposed on one side of the sliding seat 4 along the X-axis direction; the first clamping block 6 is provided with a first sealing cavity 61; a first piston plate 62 is movably and sealingly disposed within the first sealing cavity 61; the first clamping block 6... One end of the first flexible contact head 63 is provided, which communicates with one end of the first sealing cavity 61; the other end of the first clamping block 6 is provided with a first push rod 64; the first push rod 64 is telescopically movably located at the other end of the first sealing cavity 61; a first spring 65 is provided between the first push rod 64 and the first piston plate 62; the space between the first flexible contact head 63 and one end of the first sealing cavity 61 is filled with magnetorheological fluid; a first linkage assembly is provided between the driving block 5 and the first clamping block 6; a first transformer assembly is provided between the driving block 5 and the first push rod 64. This embodiment describes a welding fixture for automated argon arc welding of automotive parts. The clamping assembly further includes a second clamping block 7 that is telescopically movably disposed on the other side of the sliding seat 4 along the X-axis direction; the second clamping block 7 has a second sealing cavity 71; a second piston plate 72 is movably and sealingly disposed within the second sealing cavity 71; one end of the second clamping block 7 has a second flexible contact head 73 communicating with one end of the second sealing cavity 71; the other end of the second clamping block 7 has a second push rod 74; the second push rod 74 is telescopically movably disposed at the other end of the second sealing cavity 71; a second spring 75 is disposed between the second push rod 74 and the second piston plate 72; the space between the second flexible contact head 73 and one end of the second sealing cavity 71 is filled with magnetorheological fluid; a second linkage assembly is disposed between the driving block 5 and the second clamping block 7; and a second transformer assembly is disposed between the driving block 5 and the second push rod 74.

[0034] Specifically, in this embodiment, the welding fixture for automated argon arc welding of automotive parts places the constricted area 12 of the workpiece between two first clamping blocks 6 of the clamping seat 3, and simultaneously places the flared area 11 of the workpiece between two second clamping blocks 7 of the clamping seat 3. Then, the two clamping seats 3 are driven to move closer together. During the movement of the clamping seats 3, the second flexible contact head 73 of the second clamping block 7 first contacts the flared area 11. Under the resistance of the flared area 11, the driving block 5 moves towards the first clamping block 6. Under the action of the first linkage component, the first flexible contact head 63 of the first clamping block 6 extends out of the sliding seat 4, facilitating contact with the constricted area 12. Additionally, under the action of the first pressure-changing component, the first push rod 64 is pushed closer to the first sealing cavity 61, thereby compressing the first spring 65 and applying sufficient pressure to the magnetorheological fluid between the first flexible contact head 63 and the first sealing cavity 61, making the first flexible contact head 63 less prone to deformation. Sufficient pressure is applied to the constriction area 12 by the first flexible contact head 63 to ensure a stable and reliable connection between the first flexible contact head 63 and the constriction area 12. Additionally, under the action of the second linkage assembly, the second flexible contact head 73 of the second clamping block 7 retracts towards the sliding seat 4. Furthermore, under the action of the second pressure-changing assembly, the second push rod 74 moves away from the second sealing cavity 71, thereby relaxing the second spring 75. This reduces the pressure applied to the magnetorheological fluid between the second flexible contact head 73 and the second sealing cavity 71, making the second flexible contact head 73 more prone to deformation. After deformation, the contact area between the second flexible contact head 73 and the flared area 11 increases, effectively reducing the pressure applied to the flared area 11 by the second flexible contact head 73 and preventing damage to the flared area 11. After positioning, energizing the electromagnet generates magnetism, thereby hardening the magnetorheological fluid and ensuring the stability of the welding fixture and workpiece clamping for automated argon arc welding of automotive parts.

[0035] The welding fixture for automated argon arc welding of automotive parts described in this embodiment changes the pressure applied to the magnetorheological fluid, making the first flexible contact head 63 less prone to deformation and the second flexible contact head 73 more prone to deformation. This ensures the stability of the connection between the first flexible contact head 63 and the constriction area 12, and effectively reduces the pressure applied to the flared area 11 by the second flexible contact head 73, preventing damage to the flared area 11.

[0036] This embodiment describes a welding fixture for automated argon arc welding of automotive parts. The first linkage component includes a first linkage groove 51 located on one side of the drive block 5 and a first linkage pin 66 located at the other end of the first clamping block 6. The first linkage pin 66 is movably disposed in the first linkage groove 51. In another embodiment, the first pressure-changing component includes a first pressure-changing groove 52 located on one side of the drive block 5 and a first pressure-changing pin 67 located on the first push rod 64. The first pressure-changing pin 67 is movably disposed in the first pressure-changing groove 52. The slope of the first pressure-changing groove 52 is greater than the slope of the first linkage groove 51. Specifically, with the above arrangement, when passing through the constriction zone 12, the first push rod 64 moves closer to the first sealing cavity 61, thereby compressing the first spring 65 and applying sufficient pressure to the magnetorheological fluid between the first flexible contact head 63 and the first sealing cavity 61.

[0037] This embodiment describes a welding fixture for automated argon arc welding of automotive parts. The second linkage component includes a second linkage groove 53 located on the other side of the drive block 5 and a second linkage pin 76 located at the other end of the second clamping block 7. The second linkage pin 76 is movably disposed in the second linkage groove 53. In another embodiment, the second pressure-changing component includes a second pressure-changing groove 54 located on the other side of the drive block 5 and a second pressure-changing pin 77 located on the second push rod 74. The second pressure-changing pin 77 is movably disposed in the second pressure-changing groove 54. The slope of the second pressure-changing groove 54 is greater than the slope of the second linkage groove 53. Specifically, through the above arrangement, when passing through the flared area 11, the second push rod 74 moves away from the second sealing cavity 71, thereby relaxing the second spring 75 and reducing the pressure applied to the magnetorheological fluid between the second flexible contact head 73 and the second sealing cavity 71, making the second flexible contact head 73 more prone to deformation.

[0038] This embodiment describes a welding fixture for automated argon arc welding of automotive parts. The sliding seat 4 has a positioning block 41 in its center; a tension spring 42 is provided between the positioning block 41 and the center of the drive block 5. This arrangement facilitates the resetting of the drive block 5.

[0039] This embodiment describes a welding fixture for automated argon arc welding of automotive parts. The clamping base 3 is rotatably equipped with a screw 31 along the X-axis. The screw 31 has a first thread and a second thread at its two ends, respectively. The first thread has an opposite rotation direction to the second thread. The clamping base 3 is equipped with a clamping motor 32. The output end of the clamping motor 32 is connected to the screw 31. The sliding seats 4 of the clamping components at both ends of the clamping base 3 are threadedly connected to the first thread and the second thread, respectively. With the above configuration, activating the clamping motor 32 causes the screw 31 to rotate in either the forward or reverse direction, allowing the two sliding seats 4 to move closer or further apart, thus clamping or releasing the workpiece.

[0040] This embodiment describes a welding fixture for automated argon arc welding of automotive parts. The welding fixture further includes a base 2; both ends of the base 2 are provided with clamping seats 3; the two clamping seats 3 are arranged facing each other. This arrangement allows for clamping of both ends of the workpiece.

[0041] This embodiment describes a welding fixture for automated argon arc welding of automotive parts. The base 2 is equipped with a rotary motor 21; the output end of the rotary motor 21 is connected to the clamping seat 3. This configuration facilitates the flipping of the clamped workpiece.

[0042] This embodiment describes a welding fixture for automated argon arc welding of automotive parts. The driving block 5 has a limiting groove 55 along the Y-axis; the sliding seat 4 has a limiting pin 43; the limiting pin 43 is movably disposed within the limiting groove 55. This configuration ensures that the driving block 5 moves along the Y-axis.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A welding fixture for automated argon arc welding of automotive parts, characterized in that: Includes a clamping base (3); both ends of the clamping base (3) are provided with clamping components; The clamping assembly includes a sliding seat (4) that is slidably disposed on the clamping seat (3) along the X-axis direction, a driving block (5) that is slidably disposed on the sliding seat (4) along the Y-axis direction, and a first clamping block (6) that is telescopically disposed on one side of the sliding seat (4) along the X-axis direction. The first clamping block (6) is provided with a first sealing cavity (61); a first piston plate (62) is provided in the first sealing cavity (61) for sealing and moving; a first flexible contact head (63) is provided at one end of the first clamping block (6) and communicates with one end of the first sealing cavity (61); a first push rod (64) is provided at the other end of the first clamping block (6); the first push rod (64) is telescopically movably located at the other end of the first sealing cavity (61); a first spring (65) is provided between the first push rod (64) and the first piston plate (62); a magnetorheological fluid is provided between the first flexible contact head (63) and one end of the first sealing cavity (61); A first linkage assembly is provided between the drive block (5) and the first clamping block (6); a first transformer assembly is provided between the drive block (5) and the first push rod (64); The first linkage component includes a first linkage groove (51) disposed on one side of the drive block (5) and a first linkage pin (66) disposed on the other end of the first clamping block (6); the first linkage pin (66) is movably disposed in the first linkage groove (51); The first transformer assembly includes a first transformer sloping groove (52) disposed on one side of the drive block (5) and a first transformer pin (67) disposed on the first push rod (64); the first transformer pin (67) is movably disposed in the first transformer sloping groove (52); the slope of the first transformer sloping groove (52) is greater than the slope of the first linkage sloping groove (51); The clamping assembly further includes a second clamping block (7) that is telescopically movable on the other side of the sliding seat (4) along the X-axis direction; The second clamping block (7) is provided with a second sealing cavity (71); a second piston plate (72) is provided in the second sealing cavity (71) for sealing and moving; a second flexible contact head (73) is provided at one end of the second clamping block (7) and communicates with one end of the second sealing cavity (71); a second push rod (74) is provided at the other end of the second clamping block (7); the second push rod (74) is telescopically movably located at the other end of the second sealing cavity (71); a second spring (75) is provided between the second push rod (74) and the second piston plate (72); a magnetorheological fluid is provided between the second flexible contact head (73) and one end of the second sealing cavity (71); A second linkage assembly is provided between the drive block (5) and the second clamping block (7); a second transformer assembly is provided between the drive block (5) and the second push rod (74); The second linkage component includes a second linkage groove (53) located on the other side of the drive block (5) and a second linkage pin (76) located on the other end of the second clamping block (7); the second linkage pin (76) is movably located in the second linkage groove (53); The second transformer assembly includes a second transformer sloping groove (54) located on the other side of the drive block (5) and a second transformer pin (77) located on the second push rod (74); the second transformer pin (77) is movably located in the second transformer sloping groove (54); the slope of the second transformer sloping groove (54) is greater than the slope of the second linkage sloping groove (53).

2. The welding fixture for automated argon arc welding of automotive parts according to claim 1, characterized in that: The sliding seat (4) is provided with a positioning block (41) in the middle; a tension spring (42) is provided between the positioning block (41) and the middle of the driving block (5).

3. A welding fixture for automated argon arc welding of automotive parts according to claim 1, characterized in that: The clamping seat (3) is provided with a screw (31) that rotates along the X-axis; the two ends of the screw (31) are respectively provided with a first thread and a second thread; the rotation direction of the first thread is opposite to that of the second thread; the clamping seat (3) is provided with a clamping motor (32); the output end of the clamping motor (32) is connected to the screw (31); the sliding seats (4) of the clamping components at both ends of the clamping seat (3) are respectively threadedly connected to the first thread and the second thread.

4. A welding fixture for automated argon arc welding of automotive parts according to claim 1, characterized in that: The welding fixture for automated argon arc welding of automotive parts also includes a base (2); both ends of the base (2) are provided with clamping seats (3); the two clamping seats (3) are arranged facing each other; The drive block (5) is provided with a limiting groove (55) along the Y-axis direction; the sliding seat (4) is provided with a limiting pin (43); the limiting pin (43) is movably disposed in the limiting groove (55).

5. A welding fixture for automated argon arc welding of automotive parts according to claim 4, characterized in that: The base (2) is equipped with a rotary motor (21); the output end of the rotary motor (21) is connected to the clamping seat (3).

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