A welding fixture for mechanical engineering workpiece

Abstract

The present invention relates to the technical field of workpiece welding, and discloses a mechanical engineering workpiece welding fixing device, comprising a base, an upper surface of the base is fixedly connected to a support frame, an upper surface of the support frame is fixedly connected to a welding gun, both sides of the inner surface of the support frame are fixedly connected to an electric telescopic rod, and the free end of the electric telescopic rod is fixedly connected to a limiting plate. In the present invention, the limiting plate approaches and clamps the workpiece to fix the workpiece, thereby improving the stability and accuracy of the workpiece during welding. The electric telescopic rod can adjust the telescopic distance according to the width of the workpiece, thereby clamping workpieces of different widths, thereby improving the applicability of the device. The limiting inclined plate rotates and clamps the inclined surface or arc surface of the workpiece, thereby improving the fit of the clamping, thereby improving the clamping stability, making the welding of non-rectangular workpieces more stable and accurate, and the telescopic connecting rod telescopes in the rotating sleeve rod according to the width of the workpiece, thereby further improving the applicability of the device.

Description

Technical Field

[0001] The invention relates to the technical field of workpiece welding, in particular to a mechanical engineering workpiece welding fixture. Background Art

[0002] In mechanical engineering, a workpiece refers to a product component in the manufacturing process, also known as a manufactured part, a workpiece, a shell part, a hardware part, etc. A workpiece is a processing object in the mechanical processing process. It can be a single part or a combination of several parts fixed together. During the welding process of the workpiece, it needs to be fixed and clamped to prevent the workpiece from moving during welding. It is difficult to firmly clamp workpieces of different shapes in the existing technology, and the clamping parts need to be replaced during fixing, which is not convenient to use.

[0003] The patent with announcement number CN219234384U discloses a mechanical engineering workpiece welding fixture, which includes a support plate, and an adjustment component is also installed on the support plate, and the adjustment component includes two fixing rods fixedly connected to the upper end surface of the support plate, and a sleeve is fixedly connected to the side where the two fixing rods are close to each other, and a first telescopic spring is fixedly connected to the side of the inner wall of the sleeve close to the fixing rod, and the other end of the first telescopic spring is fixedly connected to a baffle, and the outer side surface of the baffle is slidably connected to the inner wall of the sleeve, and the other end of the baffle is fixedly connected to the telescopic rod. An adjustment component is arranged on this device, and users can realize clamping and adjustment of mechanical engineering workpieces of different sizes through this adjustment component, which can clamp stably and is convenient for staff to use, and a disassembly component is added to this mechanism, so that the clamping device damaged during welding can be replaced. Although this patent solves the above problems, there is still a problem that the clamping effect of workpieces of different shapes is not good enough, so a mechanical engineering workpiece welding fixture is proposed to solve the above problems. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a mechanical engineering workpiece welding fixture in view of the deficiencies in the above-mentioned prior art.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a mechanical engineering workpiece welding fixture, comprising a base, the upper surface of the base is fixedly connected with a support frame, the upper surface of the support frame is fixedly connected with a welding gun, the inner surface of the support frame is fixedly connected with electric telescopic rods on both sides, the free end of the electric telescopic rod is fixedly connected with a limiting plate, the fixed end circumferential surface of the electric telescopic rod is fixedly connected with a connecting block, the upper and lower sides of the connecting block are fixedly connected with support rods, the inner surface of the support rod is hinged with a rotating sleeve rod, the inner surface of the rotating sleeve rod is fixedly connected with an elastic telescopic rod, one end of the elastic telescopic rod close to the limiting plate is fixedly connected with a telescopic connecting rod, one end of the telescopic connecting rod away from the elastic telescopic rod is fixedly connected with a limiting inclined plate, one end of the rotating sleeve rod away from the limiting inclined plate is fixedly connected with a transmission inclined frame, one side of the limiting plate close to the connecting block is fixedly connected with a trapezoidal abutment rod, one side of the limiting plate close to the connecting block is fixedly connected with a slide rail, an extension device for increasing the clamping area is arranged above the base to facilitate clamping of workpieces of different sizes, and an extension device is arranged above the base. A fluxing device is provided for spraying flux on the welding gun head to improve welding efficiency. The telescopic connecting rod is slidably connected to the inner surface of the rotating sleeve rod. A torsion spring is provided at the hinge of the rotating sleeve rod and the support rod. The end of the trapezoidal contact rod away from the limit plate is in contact with the inner surface of the transmission inclined frame. The workpiece is placed on the base, and the electric telescopic rod is started. The electric telescopic rod drives the limit plate to approach and clamp the workpiece to fix the workpiece, and the electric telescopic rod can adjust the telescopic distance according to the width of the workpiece. When a non-rectangular workpiece is clamped, the free end of the electric telescopic rod contracts and drives The limit plate is close to the connecting block, and the limit plate drives the trapezoidal resistance rod to approach the two sides of the inner wall of the support frame. The trapezoidal resistance rod pushes the transmission inclined frame and the rotating sleeve rod to rotate along the hinge of the rotating sleeve rod and the support rod through the guidance of the inclined surface. The rotating sleeve rod drives the telescopic connecting rod and the limit inclined plate to rotate and clamp the inclined surface or arc surface of the workpiece. After the limit inclined plate contacts a wider non-rectangular workpiece, it slides and shrinks into the rotating sleeve rod according to the width of the workpiece. When the workpiece is narrow, the elastic reset effect of the elastic telescopic rod pushes the telescopic connecting rod to pop out of the rotating sleeve rod, and the telescopic connecting rod drives the limit inclined plate to approach the workpiece.

[0006] The cam is fixedly mounted on the support frame, and the cam is configured to connect the support frame to the support frame, and the support frame is connected to the support frame by the spring, so that the support frame can be easily moved. The end of the trapezoidal resistance plate away from the sliding rod is slidably connected to the inner surface of the guide rail. When a longer workpiece needs to be clamped and fixed, the sliding rod can be pulled out of the sliding rail, and the sliding rod drives the extension plate away from the limit plate. When a longer non-rectangular workpiece is clamped, the free end of the electric telescopic rod drives the limit plate close to the connecting block, so that the limit inclined plate clamps the workpiece. In the process of the limit plate approaching the connecting block, the slide rail is driven close to the guide rail, and the slide rail then drives the sliding rod and the trapezoidal resistance plate close to the guide rail. The trapezoidal resistance plate is affected by the guide rail. The influence of the inclined surface of the rail moves toward the side away from the electric telescopic rod, thereby driving the sliding rod to automatically extend from the sliding rail, and the sliding rod then drives the extension plate away from the limit plate. When the extension plate moves away from the limit plate, the contact arc rod and the side clamping plate are driven away from the limit plate through the connecting shaft, and because the contact arc rod extends out of the side clamping plate from the through groove, when the limit plate and the side clamping plate are away from the workpiece, the contact arc rod is still in contact with the workpiece, and rotates along the axis of the connecting shaft after being resisted by the workpiece, and the contact arc rod then drives the side clamping plate to rotate to clamp the front and back sides of the workpiece.

[0007] The U-shaped connecting shell has a bottom surface, and the bottom surface of the U-shaped connecting shell is fixedly connected to the bottom surface of the U-shaped connecting shell, and the circumferential surface of the serpentine is fixedly connected to the inner surface of the sliding plate. The transmission plate is slidably connected to the inner surface of the slide groove, and the inner surface of the transmission clamping frame and the upper and lower sides of the trapezoidal contact plate are in contact with each other. Before welding the workpiece, the elastic storage bag is squeezed, and the elastic storage bag sprays the internal flux onto the welding gun through the snake tube after being pressurized. When the trapezoidal contact plate moves, it pushes the transmission clamping frame to move backward, and the transmission clamping frame drives the transmission plate to slide backward in the slide groove, and the transmission plate drives the push plate to slide backward in the U-shaped connecting shell and squeezes the elastic storage bag from front to back. After the elastic storage bag is pressurized, it drives the snake tube to move backward, and the snake tube drives the sliding plate to slide backward in the U-shaped connecting shell, so that the snake tube is supported during the movement. At this time, the elastic storage bag can automatically spray the flux onto the welding gun through the snake tube, and when the trapezoidal contact plate stops moving, the transmission clamping frame and the transmission plate stop moving, so that the push plate stops squeezing the elastic storage bag, and the welding gun is started by the flux spraying and welds the workpiece.

[0008] The present invention adopts the above technical solution to bring the following beneficial effects:

[0009] 1. In the mechanical engineering workpiece welding fixture, the limit plate approaches and clamps the workpiece to fix the workpiece, thereby improving the stability and accuracy of the workpiece during welding. The electric telescopic rod can adjust the telescopic distance according to the width of the workpiece, thereby clamping workpieces of different widths, thereby improving the applicability of the device. The limit inclined plate rotates and clamps the inclined surface or arc surface of the workpiece, thereby improving the clamping fit and thus improving the clamping stability, making the welding of non-rectangular workpieces more stable and accurate. The telescopic connecting rod telescopes in the rotating sleeve according to the width of the workpiece, thereby further improving the applicability of the device.

[0010] 2. In the mechanical engineering workpiece welding fixture, the extension plate is away from the limit plate, thereby increasing the clamping area and improving the device's support for longer workpieces. The trapezoidal resistance plate drives the slide bar to automatically extend from the slide rail, and the slide bar then drives the extension plate away from the limit plate, which improves ease of use. The side clamping plate rotates to clamp the front and rear sides of the workpiece, increasing the clamping area for longer non-rectangular workpieces and further improving the applicability of the device.

[0011] 3. In the mechanical engineering workpiece welding fixture, the elastic storage bag is pressurized to spray the internal flux onto the welding gun through the coil, thereby assisting heat conduction during welding and improving welding efficiency. The push plate slides backward in the U-shaped connecting shell and squeezes the elastic storage bag from front to back, so that the elastic storage bag can automatically spray the flux onto the welding gun through the coil, and then the push plate stops squeezing the elastic storage bag, and the welding gun is started by the flux spray and welds the workpiece, which improves the convenience of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the three-dimensional overall structure of the present invention;

[0013] Figure 2 It is a schematic diagram of the front side cross-sectional three-dimensional structure of the present invention;

[0014] Figure 3 It is a schematic diagram of the front side cross-sectional three-dimensional structure of the support frame of the present invention;

[0015] Figure 4 For the present invention Figure 3 A is a schematic diagram of the enlarged structure of the middle part;

[0016] Figure 5 It is a schematic diagram of the front side three-dimensional structure of the extension device of the present invention;

[0017] Figure 6 For the present invention Figure 5 A schematic diagram of the enlarged structure of B;

[0018] Figure 7 It is a schematic diagram of the rear side cross-sectional three-dimensional structure of the fluxing device of the present invention;

[0019] Figure 8 For the present invention Figure 7 Schematic diagram of the enlarged structure of C in the middle;

[0020] Fig. 9 For the present invention Figure 7 Schematic diagram of the enlarged structure of D in the figure.

[0021] In the figure: 1. base; 2. support frame; 3. welding gun; 4. electric telescopic rod; 41. limit plate; 42. telescopic connecting rod; 43. limit inclined plate; 44. connecting block; 45. support rod; 46. rotating sleeve rod; 47. elastic telescopic rod; 48. transmission inclined frame; 49. trapezoidal resistance rod; 410. slide rail; 5. extension device; 51. slide rod; 52. extension plate; 53. through groove; 54. connecting shaft; 55. resistance arc rod; 56. side clamping plate; 57. guide rail; 58. fixed connecting rod; 59. trapezoidal resistance plate; 6. fluxing device; 61. fixed plate; 62. U-shaped connecting shell; 63. elastic storage bag; 64. sliding plate; 65. coil; 66. connecting plate; 67. slide groove; 68. transmission clamping frame; 69. transmission plate; 610. push plate. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] See also Figure 1-Figure 9, one embodiment of the present invention is: a mechanical engineering workpiece welding fixture, comprising a base 1, a support frame 2 is fixedly connected to the upper surface of the base 1, a welding gun 3 is fixedly connected to the upper surface of the support frame 2, electric telescopic rods 4 are fixedly connected to both sides of the inner surface of the support frame 2, a free end of the electric telescopic rod 4 is fixedly connected to a limiting plate 41, a fixed end circumferential surface of the electric telescopic rod 4 is fixedly connected to a connecting block 44, upper and lower sides of the connecting block 44 are fixedly connected to a support rod 45, a rotating sleeve rod 46 is hinged on the inner surface of the support rod 45, an elastic telescopic rod 47 is fixedly connected to the inner surface of the rotating sleeve rod 46, an end of the elastic telescopic rod 47 close to the limiting plate 41 is fixedly connected to a telescopic connecting rod 42, an end of the telescopic connecting rod 42 away from the elastic telescopic connecting rod 47 is fixedly connected to a limiting inclined plate 43, an end of the rotating sleeve rod 46 away from the limiting inclined plate 43 is fixedly connected to a transmission inclined frame 48, a side of the limiting plate 41 close to the connecting block 44 is fixedly connected to a trapezoidal abutment rod 49, and a side of the limiting plate 41 close to the connecting block 44 is fixedly connected There is a slide rail 410, and a limit plate 41 approaches and clamps the workpiece to fix the workpiece, thereby improving the stability and accuracy of the workpiece during welding. The electric telescopic rod 4 can adjust the telescopic distance according to the width of the workpiece, thereby clamping workpieces of different widths, thereby improving the applicability of the device. An extension device 5 is provided above the base 1 for increasing the clamping area and facilitating clamping of workpieces of different sizes. A fluxing device 6 is provided above the base 1 for spraying flux on the gun head of the welding gun 3 to improve welding efficiency. The connecting rod 42 is slidably connected to the inner surface of the rotating sleeve rod 46, and a torsion spring is provided at the hinge of the rotating sleeve rod 46 and the support rod 45. The end of the trapezoidal contact rod 49 away from the limit plate 41 is in contact with the inner surface of the transmission bevel frame 48. The limit bevel plate 43 rotates and clamps the inclined surface or arc surface of the workpiece, which improves the clamping fit and thus improves the clamping stability, making the welding of non-rectangular workpieces more stable and accurate. The telescopic connecting rod 42 is telescoped in the rotating sleeve rod 46 according to the width of the workpiece, further improving the applicability of the device.

[0024] Working principle: put the workpiece on the base 1, start the electric telescopic rod 4, the electric telescopic rod 4 drives the limit plate 41 to approach and clamp the workpiece, so that the workpiece is fixed, which improves the stability and accuracy of the workpiece during welding, and the electric telescopic rod 4 can adjust the telescopic distance according to the width of the workpiece, so as to clamp workpieces of different widths, thereby improving the applicability of the device. When clamping a non-rectangular workpiece, the free end of the electric telescopic rod 4 contracts and drives the limit plate 41 to approach the connecting block 44, and the limit plate 41 drives the trapezoidal contact rod 49 to approach the two sides of the inner wall of the support frame 2, and the trapezoidal contact rod 49 pushes the transmission inclined frame 48 and the rotating sleeve through the guide of the inclined surface. The rod 46 rotates along the hinge between the rotating sleeve rod 46 and the support rod 45, and the rotating sleeve rod 46 drives the telescopic link 42 and the limiting inclined plate 43 to rotate and clamp the inclined surface or arc surface of the workpiece, thereby improving the clamping fit, and then improving the clamping stability, making the welding of non-rectangular workpieces more stable and accurate, and after the limiting inclined plate 43 contacts the wider non-rectangular workpiece, it slides and shrinks into the rotating sleeve rod 46 according to the width of the workpiece. When the workpiece is narrow, the elastic reset effect of the elastic telescopic rod 47 pushes the telescopic link 42 to pop out of the rotating sleeve rod 46, and the telescopic link 42 then drives the limiting inclined plate 43 to approach the workpiece, further improving the applicability of the device.

[0025] See also Figure 1-Figure 9On the basis of the above embodiment, in another embodiment of the present invention, the extension device 5 includes a slide bar 51, an extension plate 52, and a through groove 53. The slide bar 51 is slidably connected to the inner surface of the slide rail 410, and the extension plate 52 is fixedly connected to the side of the slide bar 51 away from the inner surface of the support frame 2. The through groove 53 is arranged on the inner side of the extension plate 52, and the extension plate 52 is away from the limit plate 41, thereby increasing the clamping area and improving the supporting force of the device for longer workpieces. The extension device 5 also includes a connecting shaft 54, an abutting arc rod 55, a side clamping plate 56, a guide rail 57, a fixed connecting rod 58, and a trapezoidal abutting plate 59. The guide rail 57 is fixedly connected to the front and rear sides of the connecting block 44. The connecting shaft 54 ​​is hinged on the side of the extension plate 52 close to the guide rail 57. The abutting arc rod 55 is fixedly connected to one end of the connecting shaft 54 ​​close to the guide rail 57, and the side clamping plate 56 is fixedly connected to the end of the abutting arc rod 55 away from the limit plate 41. The fixed link 58 is fixedly connected to the end of the guide rail 57 away from the connecting block 44, and the trapezoidal contact plate 59 is fixedly connected to the side of the slide bar 51 close to the guide rail 57. A torsion spring is arranged at the hinge of the connecting shaft 54 ​​and the extension plate 52, and the upper and lower sides of the contact arc rod 55 are in contact with the inner surface of the through groove 53. The end of the fixed link 58 away from the guide rail 57 is fixedly connected to the two sides of the inner surface of the support frame 2, and the upper and lower sides of the trapezoidal contact plate 59 are in contact with the inner surface of the slide rail 410. The end of the trapezoidal contact plate 59 away from the slide bar 51 is slidably connected to the inner surface of the guide rail 57, and the trapezoidal contact plate 59 drives the slide bar 51 to automatically extend out from the slide rail 410, and the slide bar 51 drives the extension plate 52 away from the limit plate 41, which improves the convenience of use. The side clamping plate 56 rotates to clamp the front and rear sides of the workpiece, thereby increasing the clamping area for longer non-rectangular workpieces and further improving the applicability of the device.

[0026] Working principle: When it is necessary to clamp and fix a longer workpiece, the slide bar 51 can be pulled out from the slide rail 410, and the slide bar 51 drives the extension plate 52 away from the limit plate 41, thereby increasing the clamping area and improving the supporting force of the device for the longer workpiece. When clamping a longer non-rectangular workpiece, the free end of the electric telescopic rod 4 drives the limit plate 41 to approach the connecting block 44, so that the limit inclined plate 43 clamps the workpiece. In the process of the limit plate 41 approaching the connecting block 44, it drives the slide rail 410 to approach the guide rail 57, and the slide rail 410 then drives the slide bar 51 and the trapezoidal contact plate 59 to approach the guide rail 57. The trapezoidal contact plate 59 is affected by the inclined surface of the guide rail 57 to move to the side away from the electric telescopic rod 4. The movement drives the slide bar 51 to automatically extend from the slide rail 410, and the slide bar 51 then drives the extension plate 52 away from the limit plate 41, thereby improving the convenience of use. When the extension plate 52 moves away from the limit plate 41, the contact arc rod 55 and the side clamping plate 56 are driven away from the limit plate 41 through the connecting shaft 54, and because the contact arc rod 55 extends out of the side clamping plate 56 from the through groove 53, when the limit plate 41 and the side clamping plate 56 are away from the workpiece, the contact arc rod 55 is still in contact with the workpiece, and after being resisted by the workpiece, it rotates along the axis of the connecting shaft 54, and the contact arc rod 55 then drives the side clamping plate 56 to rotate to clamp the front and rear sides of the workpiece, thereby increasing the clamping area for longer non-rectangular workpieces and further improving the applicability of the device.

[0027] See also Figure 1-Figure 9On the basis of the above embodiment, in another embodiment of the present invention, the soldering device 6 includes a fixed plate 61, a U-shaped connecting shell 62, an elastic material storage bag 63, a sliding plate 64, a coil 65, and a connecting plate 66. The fixed plate 61 is fixedly connected to the inner surface of the top of the support frame 2, the U-shaped connecting shell 62 is fixedly connected to the lower surface of the fixed plate 61, the connecting plate 66 is fixedly connected to the rear side of the inner surface of the U-shaped connecting shell 62, the elastic material storage bag 63 is fixedly connected to the front side of the connecting plate 66, the sliding plate 64 is slidably connected to the inner surface of the U-shaped connecting shell 62, and the coil 65 is fixedly connected to the side of the elastic material storage bag 63 close to the sliding plate 64. After the elastic material storage bag 63 is pressurized, the internal soldering flux is sprayed onto the welding gun 3 through the coil 65, thereby assisting the heat conduction during welding and improving the welding efficiency. The soldering device 6 also includes a slide groove 67, a transmission clamping frame 68, a transmission plate 69, and a push plate 610. The slide groove 67 is opened at the bottom of the U-shaped connecting shell 62, the push plate 610 is slidably connected to the inner surface of the U-shaped connecting shell 62, the transmission plate 69 is fixedly connected to the lower surface of the push plate 610, and the transmission clamping frame 68 is fixedly connected to the bottom end of the transmission plate 69. The outer surface of the elastic storage bag 63 and the inner surface of the U-shaped connecting shell 62 are in contact with each other, the circumferential surface of the coil 65 and the inner surface of the sliding plate 64 are fixedly connected, the transmission plate 69 and the inner surface of the slide groove 67 are slidably connected, the inner surface of the transmission clamping frame 68 and the upper and lower sides of the trapezoidal contact plate 59 are in contact with each other, the push plate 610 slides backward in the U-shaped connecting shell 62 and squeezes the elastic storage bag 63 from front to back, so that the elastic storage bag 63 can automatically spray the flux onto the welding gun 3 through the coil 65, and then the push plate 610 stops squeezing the elastic storage bag 63, and the welding gun 3 is started by the flux spraying and welds the workpiece, which improves the convenience of use.

[0028] Working principle: Before welding the workpiece, squeeze the elastic material storage bag 63. After the elastic material storage bag 63 is pressurized, the internal flux is sprayed onto the welding gun 3 through the coil 65, thereby assisting the heat conduction during welding and improving the welding efficiency. When the trapezoidal contact plate 59 moves, it pushes the transmission clamping frame 68 to move backward. The transmission clamping frame 68 drives the transmission plate 69 to slide backward in the slide groove 67. The transmission plate 69 drives the push plate 610 to slide backward in the U-shaped connecting shell 62 and squeezes the elastic material storage bag 63 from front to back. After being compressed, 63 drives the coil 65 to move backward, and the coil 65 drives the sliding plate 64 to slide backward in the U-shaped connecting shell 62, so that the coil 65 is supported during the movement. At this time, the elastic storage bag 63 can automatically spray the flux through the coil 65 onto the welding gun 3. When the trapezoidal contact plate 59 stops moving, the transmission clamping frame 68 and the transmission plate 69 stop moving, so that the push plate 610 stops squeezing the elastic storage bag 63, and the welding gun 3 is started by the flux spray and welds the workpiece, which improves the convenience of use.

[0029] The present invention provides a mechanical engineering workpiece welding fixture. There are many methods and ways to implement the technical solution. The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention. All components not specified in this embodiment can be implemented by existing technologies.

Claims

1. A mechanical engineering workpiece welding fixture, comprising a base (1), characterized in that: The upper surface of the base (1) is fixedly connected to a support frame (2), the upper surface of the support frame (2) is fixedly connected to a welding gun (3), the inner surface of the support frame (2) is fixedly connected to electric telescopic rods (4), the free end of the electric telescopic rod (4) is fixedly connected to a limit plate (41), the fixed end circumferential surface of the electric telescopic rod (4) is fixedly connected to a connecting block (44), the upper and lower sides of the connecting block (44) are fixedly connected to support rods (45), the inner surface of the support rod (45) is hinged to a rotating sleeve rod (46), and the inner surface of the rotating sleeve rod (46) is fixedly connected to the inner surface of the rotating sleeve rod (46). An elastic telescopic rod (47) is fixedly connected, one end of the elastic telescopic rod (47) close to the limit plate (41) is fixedly connected to a telescopic connecting rod (42), one end of the telescopic connecting rod (42) away from the elastic telescopic rod (47) is fixedly connected to a limit inclined plate (43), one end of the rotating sleeve rod (46) away from the limit inclined plate (43) is fixedly connected to a transmission inclined frame (48), one side of the limit plate (41) close to the connecting block (44) is fixedly connected to a trapezoidal abutment rod (49), and one side of the limit plate (41) close to the connecting block (44) is fixedly connected to a slide rail (410); An extension device (5) is provided above the base (1) for increasing the clamping area to facilitate clamping of workpieces of different sizes, and a fluxing device (6) is provided above the base (1) for spraying flux onto the gun head of the welding gun (3) to improve welding efficiency.

2. A mechanical engineering workpiece welding fixture according to claim 1, characterized in that: The telescopic connecting rod (42) and the inner surface of the rotating sleeve rod (46) are slidably connected, a torsion spring is provided at the hinge of the rotating sleeve rod (46) and the support rod (45), and one end of the trapezoidal abutment rod (49) away from the limiting plate (41) is in contact with the inner surface of the transmission inclined frame (48).

3. A mechanical engineering workpiece welding fixture according to claim 2, characterized in that: The extension device (5) comprises a slide bar (51), an extension plate (52), and a through slot (53); the slide bar (51) is slidably connected to the inner surface of the slide rail (410); the extension plate (52) is fixedly connected to a side of the slide bar (51) away from the inner surface of the support frame (2); and the through slot (53) is provided on the inner side of the extension plate (52).

4. A mechanical engineering workpiece welding fixture according to claim 3, characterized in that: The extension device (5) further comprises a connecting shaft (54), a contact arc rod (55), a side clamping plate (56), a guide rail (57), a fixed connecting rod (58), and a trapezoidal contact plate (59); the guide rail (57) is fixedly connected to the front and rear sides of the connecting block (44); the connecting shaft (54) is hinged to the side of the extension plate (52) close to the guide rail (57); the contact arc rod (55) is fixedly connected to one end of the connecting shaft (54) close to the guide rail (57); the side clamping plate (56) is fixedly connected to one end of the contact arc rod (55) away from the limiting plate (41); the fixed connecting rod (58) is fixedly connected to one end of the guide rail (57) away from the connecting block (44); and the trapezoidal contact plate (59) is fixedly connected to one side of the sliding rod (51) close to the guide rail (57).

5. A mechanical engineering workpiece welding fixture according to claim 4, characterized in that: A torsion spring is provided at the hinge of the connecting shaft (54) and the extension plate (52); the upper and lower sides of the abutting arc rod (55) are in contact with the inner surface of the through groove (53); one end of the fixed connecting rod (58) away from the guide rail (57) is fixedly connected to the inner surface of the support frame (2); the upper and lower sides of the trapezoidal abutting plate (59) are in contact with the inner surface of the slide rail (410); and one end of the trapezoidal abutting plate (59) away from the slide rod (51) is slidably connected to the inner surface of the guide rail (57).

6. A mechanical engineering workpiece welding fixture according to claim 5, characterized in that: The soldering device (6) comprises a fixed plate (61), a U-shaped connecting shell (62), an elastic material storage bag (63), a sliding plate (64), a coil (65), and a connecting plate (66), wherein the fixed plate (61) is fixedly connected to the inner surface of the top of the support frame (2), the U-shaped connecting shell (62) is fixedly connected to the lower surface of the fixed plate (61), the connecting plate (66) is fixedly connected to the rear side of the inner surface of the U-shaped connecting shell (62), the elastic material storage bag (63) is fixedly connected to the front side of the connecting plate (66), the sliding plate (64) is slidably connected to the inner surface of the U-shaped connecting shell (62), and the coil (65) is fixedly connected to a side of the elastic material storage bag (63) close to the sliding plate (64).

7. A mechanical engineering workpiece welding fixture according to claim 6, characterized in that: The soldering device (6) also includes a slide groove (67), a transmission clamping frame (68), a transmission plate (69), and a push plate (610), wherein the slide groove (67) is provided at the bottom of the U-shaped connecting shell (62), the push plate (610) is slidably connected to the inner surface of the U-shaped connecting shell (62), the transmission plate (69) is fixedly connected to the lower surface of the push plate (610), and the transmission clamping frame (68) is fixedly connected to the bottom end of the transmission plate (69).

8. A mechanical engineering workpiece welding fixture according to claim 7, characterized in that: The outer surface of the elastic material storage bag (63) and the inner surface of the U-shaped connecting shell (62) are in contact with each other, the circumferential surface of the coiled tube (65) and the inner surface of the sliding plate (64) are fixedly connected, the transmission plate (69) and the inner surface of the slide groove (67) are slidably connected, and the inner surface of the transmission clamping frame (68) and the upper and lower sides of the trapezoidal contact plate (59) are in contact with each other.

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