Welding fixture for automatic argon arc welding of automobile parts

Abstract

The invention relates to the technical field of welding fixtures, in particular to a welding fixture for automatic argon arc welding of automobile parts. Clamping assemblies are arranged at the two ends of the clamping seat; the clamping assembly comprises a sliding seat arranged on the clamping seat in a sliding mode in the X-axis direction, a driving block arranged on the sliding seat in a sliding mode in the Y-axis direction and a first clamping block movably arranged on one side of the sliding seat in a telescopic mode in the X-axis direction. According to the invention, by changing the pressure applied to the magnetorheological fluid, the first flexible contact head is not easy to deform, and the second flexible contact head is easy to deform, so that the stability of connection between the first flexible contact head and the necking area can be ensured, and the intensity of pressure applied to the flaring area by the second flexible contact head can be effectively reduced; and damage to the flaring area is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of welding fixtures, and in particular to a welding fixture used for automated argon arc welding of automobile parts. Background Art

[0002] In modern manufacturing, the stretch forming process is widely used in precision manufacturing fields such as automotive manufacturing due to its ability to efficiently produce parts with complex curved surfaces. However, the unique mechanical distribution characteristics of stretch-formed parts due to their unique forming process pose significant and difficult-to-overcome challenges to the subsequent welding and clamping processes.

[0003] by Figure 1 Taking a typical stretch-formed workpiece as an example, the workpiece typically comprises two key structural components: a necking region 12 and a flared region 11. Such workpieces exhibit distinct differences in mechanical properties: the flared region 11 undergoes significant material expansion during the stretch-forming process, resulting in relatively poor overall structural strength and weak deformation resistance. Conversely, the necking region 12, subjected to intense compression during forming, develops a denser structure, resulting in greater strength and the ability to withstand higher external forces. In current production practices, conventional welding fixtures generally employ a single, fixed clamping structure. The core flaw of this structural design is that the clamping force and action are pre-set and non-adjustable, making it impossible to dynamically adapt to the mechanical properties of different workpiece shapes or locations. Specifically, when clamping a workpiece comprising a necking region 12 and a flared region 11, conventional fixtures cannot reduce the clamping force to account for the lower strength of the flared region 11, nor can they increase the clamping force to accommodate the higher strength of the necking region 12.

[0004] This technical limitation directly leads to a series of significant quality defects during the welding process: for the expansion area 11, since the clamping force exceeds its limit, it is very easy to cause plastic deformation of the material, which manifests as dents, wrinkles or dimensional abnormalities on the workpiece surface; and the necking area 12 is affected by factors such as welding stress and thermal deformation during the welding process due to insufficient clamping force, which is prone to displacement deviation, causing the originally precise assembly position to shift.

[0005] These quality defects ultimately result in weld dimensional accuracy errors, preventing the workpiece from meeting the required assembly tolerances. As the automotive industry's demands for product quality and performance continue to rise, the demand for high-precision welding standards is becoming increasingly stringent, especially in the welding of key parts such as body structures and chassis components. Traditional welding fixtures, which suffer from reduced yields and production efficiency, have become a bottleneck restricting the industry's development, making them difficult to adapt to the high-precision production demands of modern automotive manufacturing. Summary of the Invention

[0006] The object of the present invention is to address the above-mentioned deficiencies in the prior art and to provide a welding fixture for automated argon arc welding of automobile parts.

[0007] The object of the present invention is achieved through the following technical solutions: A welding fixture for automated argon arc welding of automobile parts, comprising a clamping seat; clamping assemblies are provided at both ends of the clamping seat;

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

[0009] A first sealing cavity is provided in the first clamping block; a first piston plate is provided in a sealing and movable manner in the first sealing cavity; a first flexible contact head is provided at one end of the first clamping block and is in communication with one end of the first sealing cavity; a first push rod is provided at the other end of the first clamping block; the first push rod is telescopically provided at the other end of the first sealing cavity; a first spring is provided between the first push rod and the first piston plate; and a magnetorheological fluid is provided between the first flexible contact head and one end of the first sealing cavity.

[0010] A first linkage assembly is provided between the driving block and the first clamping block; and a first voltage transformation assembly is provided between the driving block and the first push rod.

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

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

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

[0014] A second sealed cavity is provided in the second clamping block; a second piston plate is provided in a sealing manner in the second sealed cavity; a second flexible contact head connected to one end of the second sealed cavity is provided at one end of the second clamping block; a second push rod is provided at the other end of the second clamping block; the second push rod is telescopically provided at the other end of the second sealed cavity; a second spring is provided between the second push rod and the second piston plate; and a magnetorheological fluid is provided between the second flexible contact head and one end of the second sealed cavity.

[0015] A second linkage assembly is provided between the driving block and the second clamping block; and a second voltage transformation assembly is provided between the driving block and the second push rod.

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

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

[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 present invention is further configured such that the clamping seat is provided with a screw that rotates along the X-axis direction; a first thread and a second thread are respectively provided at both ends of the screw; 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 automobile parts further comprises a machine base; both ends of the machine base are provided with clamping seats; the two clamping seats are arranged opposite to each other;

[0021] The driving block is provided with a limiting groove along the Y-axis direction; the sliding seat is provided with a limiting pin; and the limiting pin is movably arranged in the limiting groove.

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

[0023] Beneficial effects of the present invention: The present invention changes the pressure applied to the magnetorheological fluid, so that the first flexible contact head is not easy to deform, and the second flexible contact head is easy to deform, thereby ensuring the stability of the connection between the first flexible contact head and the shrinking area, and effectively reducing the pressure applied to the expanding area by the second flexible contact head to prevent damage to the expanding area. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural diagram of the workpiece;

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

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

[0027] Figure 4 It is a structural schematic diagram of the clamping seat of the present invention;

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

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

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

[0031] Among them: 11. expansion area; 12. contraction area; 2. machine base; 21. rotating motor; 3. clamping seat; 31. screw; 32. clamping motor; 4. sliding seat; 41. positioning block; 42. tension spring; 43. limit pin; 5. driving block; 51. first linkage bevel; 52. first voltage-changing bevel; 53. second linkage bevel; 54. second voltage-changing bevel; 55. limit slot; 6. first clamping block; 61. first sealing chamber; 62. first piston plate; 63. first flexible contact head; 64. first push rod; 65. first spring; 66. first linkage pin; 67. first voltage-changing pin; 7. second clamping block; 71. second sealing chamber; 72. second piston plate; 73. second flexible contact head; 74. second push rod; 75. second spring; 76. second linkage pin; 77. second voltage-changing pin. DETAILED DESCRIPTION

[0032] The present invention is further described with reference to the following examples.

[0033] Depend on Figures 2 to 7It can be seen that the welding fixture for automated argon arc welding of automobile 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 arranged on the clamping seat 3 along the X-axis direction, a driving block 5 slidably arranged on the sliding seat 4 along the Y-axis direction, and a first clamping block 6 movably arranged on one side of the sliding seat 4 along the X-axis direction; a first sealing cavity 61 is provided in the first clamping block 6; a first piston plate 62 is provided in the first sealing cavity 61 for sealing and movement; the first clamping block 6 A first flexible contact head 63 connected to one end of the first sealed cavity 61 is provided at one end; a first push rod 64 is provided at the other end of the first clamping block 6; the first push rod 64 is telescopically arranged at the other end of the first sealed 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 sealed cavity 61 is filled with magnetorheological fluid; a first linkage component is provided between the driving block 5 and the first clamping block 6; a first transformer component is provided between the driving block 5 and the first push rod 64. The welding fixture described in this embodiment is used for automated argon arc welding of automobile parts, and the clamping assembly also includes a second clamping block 7 that is telescopically movable along the X-axis direction and is arranged on the other side of the sliding seat 4; a second sealed cavity 71 is provided in the second clamping block 7; a second piston plate 72 is sealed and movable in the second sealed cavity 71; one end of the second clamping block 7 is provided with a second flexible contact head 73 that is connected to one end of the second sealed 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 movable and is arranged at the other end of the second sealed cavity 71; a second spring 75 is provided 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 sealed cavity 71 is filled with magnetorheological fluid; a second linkage assembly is provided between the driving block 5 and the second clamping block 7; a second transformer assembly is provided between the driving block 5 and the second push rod 74.

[0034] Specifically, the welding fixture for automated argon arc welding of automotive parts described in this embodiment places the necking area 12 of the workpiece between the two first clamping blocks 6 of the clamping seat 3, and at the same time places the flaring area 11 of the workpiece between the two second clamping blocks 7 of the clamping seat 3, and then drives the two clamping seats 3 closer to each other. During the movement of the clamping seat 3, the second flexible contact head 73 of the second clamping block 7 first contacts the flaring area 11. Under the resistance of the flaring area 11, the driving block 5 moves toward the direction of 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 is driven to extend out of the sliding seat 4 to facilitate contact with the necking area 12. In addition, under the action of the first transformer component, the first push rod 64 is pushed to move 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, so that the first flexible contact head 63 is not easily deformed. Ensure that the first flexible contact head 63 applies sufficient pressure to the necking area 12, so that the connection between the first flexible contact head 63 and the necking area 12 is stable and reliable; in addition, under the action of the second linkage component, the second flexible contact head 73 of the second clamping block 7 is driven to shrink toward the sliding seat 4, and in addition, under the action of the second transformer component, the second push rod 74 is pushed to move 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 easy to deform. After the second flexible contact head 73 is deformed, the contact area with the flaring area 11 increases, thereby effectively reducing the pressure applied by the second flexible contact head 73 to the flaring area 11, and preventing damage to the flaring area 11; after positioning is completed, the electromagnet is energized to generate magnetism, thereby hardening the magnetorheological fluid, ensuring the stability of the welding fixture and workpiece clamping used 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, so that the first flexible contact head 63 is not easy to deform, while the second flexible contact head 73 is easy to deform, thereby ensuring the stability of the connection between the first flexible contact head 63 and the shrinking area 12, and effectively reducing the pressure applied by the second flexible contact head 73 to the expanding area 11, thereby preventing damage to the expanding area 11.

[0036] In the welding fixture for automated argon arc welding of automotive parts described in this embodiment, the first linkage assembly includes a first linkage bevel 51 provided on one side of the drive block 5 and a first linkage pin 66 provided on the other end of the first clamping block 6; the first linkage pin 66 is movably provided in the first linkage bevel. In the welding fixture for automated argon arc welding of automotive parts described in this embodiment, the first voltage-transformation assembly includes a first voltage-transformation bevel 52 provided on one side of the drive block 5 and a first voltage-transformation pin 67 provided on the first push rod 64; the first voltage-transformation pin 67 is movably provided in the first voltage-transformation bevel 52; the slope of the first voltage-transformation bevel 52 is greater than the slope of the first linkage bevel. Specifically, through the above-mentioned arrangement, when passing through the necking area 12, the first push rod 64 can move closer to the first sealed 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 sealed cavity 61.

[0037] In a welding fixture for automated argon arc welding of automotive parts described in this embodiment, the second linkage assembly includes a second linkage chute 53 provided on the other side of the drive block 5 and a second linkage pin 76 provided on the other end of the second clamping block 7; the second linkage pin 76 is movably provided in the second linkage chute. In a welding fixture for automated argon arc welding of automotive parts described in this embodiment, the second voltage-transformation assembly includes a second voltage-transformation chute 54 provided on the other side of the drive block 5 and a second voltage-transformation pin 77 provided on the second push rod 74; the second voltage-transformation pin 77 is movably provided in the second voltage-transformation chute 54; the slope of the second voltage-transformation chute 54 is greater than the slope of the second linkage chute. Specifically, through the above arrangement, when passing through the flared area 11, the second push rod 74 can move away from the second sealed cavity 71, thereby relaxing the second spring 75, reducing the pressure applied to the magnetorheological fluid between the second flexible contact head 73 and the second sealed cavity 71, and making the second flexible contact head 73 more easily deformable.

[0038] In the welding fixture for automated argon arc welding of automobile parts described in this embodiment, a positioning block 41 is provided in the middle of the sliding seat 4, and a tension spring 42 is provided between the positioning block 41 and the middle of the driving block 5. This arrangement facilitates the resetting of the sliding seat 4.

[0039] The present embodiment describes a welding fixture for automated argon arc welding of automotive parts, wherein the clamping seat 3 is provided with a screw 31 that rotates along the X-axis direction; the two ends of the screw 31 are provided with a first thread and a second thread respectively; 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 assembly at both ends of the clamping seat 3 are respectively threadedly connected to the first thread and the second thread. Through the above-mentioned arrangement, starting the clamping motor 32 causes the screw 31 to rotate forward or reverse, that is, the two sliding seats 4 can be moved toward each other or away from each other to complete the clamping or release of the workpiece.

[0040] The welding fixture for automated argon arc welding of automotive parts described in this embodiment includes a base 2, with clamping seats 3 provided at both ends of the base 2. The two clamping seats 3 are arranged opposite each other. This arrangement enables clamping of both ends of a workpiece.

[0041] In the welding fixture for automated argon arc welding of automobile parts described in this embodiment, the base 2 is provided with a rotary motor 21; the output end of the rotary motor 21 is connected to the clamping base 3. This arrangement facilitates flipping of the clamped workpiece.

[0042] In the welding fixture for automated argon arc welding of automotive parts described in this embodiment, the drive block 5 is provided with a limiting groove 55 along the Y-axis; the sliding seat 4 is provided with a limiting pin 43; and the limiting pin 43 is movably mounted in the limiting groove 55. This arrangement ensures that the drive block 5 moves along the X-axis.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents 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 by: It comprises a clamping seat (3); both ends of the clamping seat (3) are provided with clamping components; The clamping assembly comprises a sliding seat (4) slidably arranged on the clamping seat (3) along the X-axis direction, a driving block (5) slidably arranged on the sliding seat (4) along the Y-axis direction, and a first clamping block (6) telescopically arranged on one side of the sliding seat (4) along the X-axis direction; A first sealing cavity (61) is provided in the first clamping block (6); a first piston plate (62) is provided in the first sealing cavity (61) for sealing and movement; a first flexible contact head (63) is provided at one end of the first clamping block (6) and is in communication 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 provided 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 driving block (5) and the first clamping block (6); and a first voltage transformation assembly is provided between the driving block (5) and the first push rod (64).

2. The welding fixture for automated argon arc welding of automobile parts according to claim 1, characterized in that: The first linkage component comprises a first linkage oblique slot (51) provided on one side of the driving block (5) and a first linkage pin (66) provided on the other end of the first clamping block (6); the first linkage pin (66) is movably provided in the first linkage oblique slot.

3. The welding fixture for automated argon arc welding of automobile parts according to claim 2, characterized in that: The first voltage-transforming assembly comprises a first voltage-transforming inclined slot (52) provided on one side of the driving block (5) and a first voltage-transforming pin (67) provided on the first push rod (64); the first voltage-transforming pin (67) is movably provided on the first voltage-transforming inclined slot (52); and the slope of the first voltage-transforming inclined slot (52) is greater than the slope of the first linkage inclined slot.

4. The welding fixture for automated argon arc welding of automobile parts according to claim 1, characterized in that: The clamping assembly further comprises a second clamping block (7) which is arranged on the other side of the sliding seat (4) and is movable and retractable along the X-axis direction; A second sealing cavity (71) is provided in the second clamping block (7); a second piston plate (72) is provided in a sealing and movable manner in the second sealing cavity (71); a second flexible contact head (73) is provided at one end of the second clamping block (7) and is communicated 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 movable and is provided 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 driving block (5) and the second clamping block (7); and a second voltage transformation assembly is provided between the driving block (5) and the second push rod (74).

5. The welding fixture for automated argon arc welding of automobile parts according to claim 4, characterized in that: The second linkage assembly comprises a second linkage oblique slot (53) provided on the other side of the driving block (5) and a second linkage pin (76) provided on the other end of the second clamping block (7); the second linkage pin (76) is movably provided in the second linkage oblique slot.

6. The welding fixture for automated argon arc welding of automobile parts according to claim 5, characterized in that: The second voltage-transforming assembly comprises a second voltage-transforming inclined slot (54) provided on the other side of the driving block (5) and a second voltage-transforming pin (77) provided on the second push rod (74); the second voltage-transforming pin (77) is movably provided on the second voltage-transforming inclined slot (54); and the slope of the second voltage-transforming inclined slot (54) is greater than the slope of the second linkage inclined slot.

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

8. The welding fixture for automated argon arc welding of automobile parts according to claim 1, characterized in that: The clamping seat (3) is provided with a screw (31) that rotates along the X-axis direction; a first thread and a second thread are respectively provided at both ends of the screw (31); 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.

9. The welding fixture for automated argon arc welding of automobile parts according to claim 1, characterized in that: The welding fixture for automated argon arc welding of automobile parts further comprises a machine base (2); both ends of the machine base (2) are provided with clamping seats (3); the two clamping seats (3) are arranged opposite to each other; The driving 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); and the limiting pin (43) is movably arranged in the limiting groove (55).

10. The welding fixture for automated argon arc welding of automobile parts according to claim 9, characterized in that: The machine base (2) is provided with a rotating motor (21); the output end of the rotating motor (21) is connected to the clamping base (3).

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