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CN-122007772-A - Self-adaptive welding fixture for automobile parts

CN122007772ACN 122007772 ACN122007772 ACN 122007772ACN-122007772-A

Abstract

The invention relates to the field of automobile part welding, in particular to an adaptive welding fixture for automobile parts. The self-adaptive welding fixture for the automobile parts comprises an adjusting platform, an installing seat, a rotating mechanism, a horizontal moving mechanism and the like, wherein the installing seat is arranged on the left side and the right side of the top of the adjusting platform, the installing seat can change the left position and the right position of the top of the adjusting platform, the rotating mechanism is arranged in the middle of the installing seat, the rotating end of the rotating mechanism is connected with an inner-outer fixing mechanism, the inner-outer fixing mechanism fixes a workpiece from inside to outside, and the rotating end of the rotating mechanism is connected with an outer-inner fixing mechanism. According to the invention, the mounting position of the clamp can be adjusted through the adjusting platform, so that the clamp can be mounted at the optimal position for welding, meanwhile, the fault tolerance rate of clamp mounting and the universality of the clamp are improved, and any position of a workpiece can be moved to a welding position for welding through the cooperation of the rotating mechanism and the horizontal moving mechanism.

Inventors

  • XU TIANTIAN
  • SUN YONGZHI
  • SUN HAIFENG

Assignees

  • 长春市莱利达科技有限责任公司
  • 吉林省程讯达科技有限公司

Dates

Publication Date
20260512
Application Date
20260414

Claims (10)

  1. 1. The self-adaptive welding fixture for the automobile parts is characterized by comprising an adjusting platform (1), an installing seat (2), a rotating mechanism (3), a horizontal moving mechanism (4), an inner-outer fixing mechanism (5) and an outer-inner fixing mechanism (6), wherein the installing seat (2) is arranged on the left side and the right side of the top of the adjusting platform (1), the installing seat (2) can change the left position and the right position of the top of the adjusting platform (1), the rotating mechanism (3) is arranged in the middle of the installing seat (2), the rotating end of the rotating mechanism (3) is connected with the inner-outer fixing mechanism (5), the inner-outer fixing mechanism (5) is used for fixing a workpiece from inside to outside, the rotating end of the rotating mechanism (3) is connected with the outer-inner fixing mechanism (6), the outer-inner fixing mechanism (6) is used for fixing the workpiece from outside to inside, the inner-outer fixing mechanism (5) and the outer-inner fixing mechanism (6) can fix the workpieces with different sizes, and the horizontal moving mechanism (4) can be driven by the horizontal moving mechanism (4) to change the horizontal moving mechanism (4).
  2. 2. The self-adaptive welding fixture for automobile parts according to claim 1, wherein the adjusting platform (1) comprises a fixture mounting plate (11) with a plurality of T-shaped sliding grooves (12) formed in the top, T-shaped bolts (13) are connected in the T-shaped sliding grooves (12) in a sliding mode, and the T-shaped bolts (13) penetrate upwards through a mounting seat (2) above the T-shaped bolts and are connected with compression nuts (14) through threads.
  3. 3. The self-adaptive welding fixture for automobile parts according to claim 2, wherein the rotating mechanism (3) comprises a first motor (31) arranged on the side face of the mounting seat (2) and a sleeve (32) rotatably arranged in the middle of the mounting seat (2), a transmission belt group (33) is connected between the sleeve (32) and an output shaft of the first motor (31), and a keyed transmission shaft (34) is slidably arranged in the sleeve (32).
  4. 4. The self-adaptive welding fixture for automobile parts according to claim 3, wherein the horizontal moving mechanism (4) comprises a hydraulic cylinder (41) arranged at the top of the installation seat (2), a connecting plate (42) is arranged on the installation seat (2) below the hydraulic cylinder (41), a hinge rod (43) is rotatably arranged at the end part of the connecting plate (42), waist-shaped holes (44) are formed in the upper part and the lower part of the hinge rod (43), an adapter (45) is rotatably arranged at the telescopic end of the hydraulic cylinder (41) and the left end of the keyed transmission shaft (34), and clamping shafts (46) are arranged on the adapter (45) and are slidably connected with the waist-shaped holes (44) on the upper side and the lower side.
  5. 5. The self-adaptive welding fixture for automobile parts according to claim 4, wherein the inside-out fixing mechanism (5) comprises a fixing structure for fixing a workpiece and a first driving mechanism for driving the fixing structure to work.
  6. 6. The self-adaptive welding fixture for automobile parts according to claim 5, wherein the fixing structure comprises a hollow cylinder (51) arranged at the right end of the left keyed transmission shaft (34), a first installation disc (52) is fixedly connected to the right part of the hollow cylinder (51), a circle of first sliding grooves (53) are formed in the right side surface of the first installation disc (52) along the radial direction of the first installation disc, first stepped claws (54) are connected in the first sliding grooves (53) in a sliding manner, the thickness of the first stepped claws (54) decreases from inside to outside, the inner end surface of the first stepped claws (54) is an inclined surface which is inclined upwards, a first spring (55) is connected between the first stepped claws (54) and the first installation disc (52), a sliding rod (56) is connected in a sliding manner in the hollow cylinder (51), a circle of wedge blocks (57) with the same number as the first stepped claws (54) are arranged at the right end of the sliding rod (56), the inclined surface of the wedge blocks (57) is in a sliding manner of the first stepped claws (54) along the radial direction, the inclined surface of the first stepped claws (54) is connected with a connecting rod (58), and a connecting rod (58) is connected with a connecting rod (58) along the radial direction of the connecting rod (58).
  7. 7. The self-adaptive welding fixture for automobile parts according to claim 6, wherein the first driving mechanism comprises a first sliding mounting plate (511) which is slidably connected with a left mounting seat (2) through a first guide shaft (512), a second motor (513) is mounted on the first sliding mounting plate (511), a screw rod (514) is connected to an output shaft of the second motor (513), the end part of the screw rod (514) is rotatably and slidably connected with a first mounting plate (52), a guide rod (515) is fixedly connected to the upper part of the first sliding mounting plate (511), the end part of the guide rod (515) is rotatably and slidably connected with the first mounting plate (52), a push plate (516) is slidably connected to the guide rod (515), the push plate (516) is rotatably connected to the right side of the connecting ring (510), the lower part of the push plate (516) is in threaded connection with the screw rod (514), and a circle of balls (517) are rotatably arranged on a contact surface of the push plate (516) and the connecting ring (510).
  8. 8. The self-adaptive welding fixture for automobile parts according to claim 7, wherein the external-to-internal fixing mechanism (6) comprises a clamping mechanism for clamping a workpiece and a second driving mechanism for driving the clamping mechanism to work.
  9. 9. The self-adaptive welding fixture for automobile parts according to claim 8, wherein the clamping mechanism comprises a second mounting plate (61) mounted at the left end of the right-side keyed transmission shaft (34), a circle of second sliding grooves (62) are formed in the left side surface of the second mounting plate (61) along the radial direction of the second mounting plate, second stepped claws (63) are slidably connected in the second sliding grooves (62), the thickness of the second stepped claws (63) decreases from outside to inside, telescopic rods (64) are connected between the second stepped claws (63) and the second mounting plate (61), and second springs (65) are connected between the telescopic rods (64) and the second stepped claws (63).
  10. 10. The self-adaptive welding fixture for automobile parts according to claim 9, wherein the second driving mechanism comprises a second sliding mounting plate (66) which is slidably connected to the right side mounting seat (2) through a second guide shaft (67), an annular cylinder body (68) is rotatably mounted in the middle of the second sliding mounting plate (66), the annular cylinder body (68) is connected with the fixed end of each telescopic rod (64) through a communicating pipe (69), a piston plate (610) is slidably connected in the annular cylinder body (68), a circle of sliding rods (611) penetrating through the right wall of the annular cylinder body (68) is arranged on the right side surface of the piston plate (610), an adapter ring (612) is slidably connected between the right ends of the sliding rods (611), air cylinders (613) are symmetrically arranged on the side surfaces of the second sliding mounting plate (66), and telescopic ends of the air cylinders (613) are fixedly connected with the adapter ring (612).

Description

Self-adaptive welding fixture for automobile parts Technical Field The invention relates to the field of automobile part welding, in particular to an adaptive welding fixture for automobile parts. Background In the process of automobile manufacture and maintenance, welding is one of the key processes for connecting various metal parts. In order to ensure welding quality, improve assembly precision and improve production efficiency, a special fixture is generally required to accurately position and reliably fix the welded parts. In particular, when handling tubular automotive parts having complex geometries or different dimensions, such as exhaust pipes, drive shafts, etc., it is often difficult for conventional welding jigs to combine versatility with clamping stability. In the prior art, part of the welding fixture adopts a rigid structural design, is only suitable for workpieces with specific sizes or shapes, and once the specifications of parts change, the whole fixture is replaced, so that the equipment cost is increased, and the flexibility of the production line is reduced. In addition, aiming at the welding scene of a bent pipeline or a multi-section combined pipe fitting, the traditional clamp lacks dynamic adjustment capability on spatial postures (such as angles and heights), so that the problems of incomplete clamping, dislocation of welding seams, welding failure and the like frequently occur. Chinese patent CN117001263B discloses a welding fixture for automobile parts, which is adapted to pipelines with different lengths and bending forms to a certain extent by arranging a first clamping mechanism (for clamping the inner wall of the pipeline) and a second clamping mechanism (for clamping the outer wall), and combining a pulling assembly, a rotating assembly and a lifting assembly. However, the device is mainly oriented to a specific type of tubular structure, the self-adaptation capability of the device is still limited to preset mechanical linkage logic, and the device has no universality for non-tubular or irregularly-shaped automobile parts (such as brackets, flanges, special-shaped shells and the like). Therefore, there is a need to develop an adaptive welding jig for automobile parts. Disclosure of Invention In order to overcome the defects in the prior art, the invention provides an adaptive welding fixture for automobile parts. The technical scheme is that the self-adaptive welding fixture for the automobile parts comprises an adjusting platform, an installing seat, a rotating mechanism, a horizontal moving mechanism, an inner-outer fixing mechanism and an outer-inner fixing mechanism, wherein the installing seat is arranged on the left side and the right side of the top of the adjusting platform, the installing seat can change the left position and the right position of the top of the adjusting platform, the rotating mechanism is arranged in the middle of the installing seat, the rotating end of the rotating mechanism on the left side is connected with the inner-outer fixing mechanism, the inner-outer fixing mechanism is used for fixing a workpiece from inside to outside, the rotating end of the rotating mechanism on the right side is connected with the outer-inner fixing mechanism, the outer-inner fixing mechanism is used for fixing the workpiece from outside to inside, the inner-outer fixing mechanism and the outer-inner fixing mechanism can be used for fixing workpieces with different sizes, and the horizontal moving mechanism is arranged on the installing seat and can drive the inner-outer fixing mechanism and the outer-inner fixing mechanism to change the left position and right position. As a further preferable scheme, the adjusting platform comprises a fixture mounting plate with a plurality of T-shaped sliding grooves formed in the top, T-shaped bolts are connected in the T-shaped sliding grooves in a sliding mode, and the T-shaped bolts upwards penetrate through a mounting seat above the T-shaped bolts and are connected with compression nuts through threads. As a further preferable scheme, the rotating mechanism comprises a first motor arranged on the side face of the mounting seat and a sleeve rotatably arranged in the middle of the mounting seat, a transmission belt group is connected between the sleeve and an output shaft of the first motor, and a transmission shaft with a key is slidably arranged in the sleeve. As a further preferred scheme, horizontal migration mechanism is including installing in the pneumatic cylinder at mount pad top, be provided with the connecting plate on the mount pad of pneumatic cylinder below, the articulated pole is installed in the rotation of connecting plate tip, waist type hole has all been seted up to articulated pole upper portion and lower part, the adapter is installed in the flexible end of pneumatic cylinder and the rotation of keyed transmission shaft left end, all be provided with the card axle on the adapter, the waist type hole sli