Automobile bumper welding tool

Abstract

The invention discloses an automobile bumper welding tool, and relates to the field of automobile accessory machining equipment.The automobile bumper welding tool comprises a tool bottom plate, a tool support and welding supports, the tool support is arranged on the tool bottom plate, the welding supports are arranged at the two ends of the tool support, and the tool support is used for supporting an automobile bumper; the welding bracket is used for mounting a welding structure; the tool support comprises side face supports and a middle support, and the side face supports are arranged at the two ends of the middle support. The welding support comprises a bottom support and a sliding support, a pushing air cylinder is arranged on the bottom support, the welding structure comprises a hot welding structure and a supporting needle structure, the hot welding structure is installed on the sliding support, and the supporting needle structure is installed in the hot welding structure. Flanges and burrs in the mounting hole are improved, and meanwhile the problem that the deformation amount of the mounting hole is large in traditional sweat soldering is solved.

Description

Technical Field

[0001] This invention relates to the field of automotive parts processing equipment, specifically to a welding fixture for automotive bumpers. Background Technology

[0002] The intelligent upgrade of new energy vehicles has driven the widespread application of vehicle sensors such as cameras, millimeter-wave radar, and lidar. To achieve high-precision environmental perception and autonomous driving functions, these sensors typically need to be fixed to the surface or interior of the front / rear bumper of the vehicle using dedicated mounting brackets, and the accuracy requirements for the installation position are extremely high. Therefore, mounting holes that match the sensor mounting brackets need to be pre-machined on the bumper body.

[0003] Currently, the connection between plastic bumpers and metal / plastic mounting bases primarily employs thermofusion welding. This process involves heating to locally melt the plastic material around the bumper mounting holes, then fusing it with the plastic components of the mounting base (or the plastic substrate of the embedded metal component) under pressure and cooling to form a seamless connection. However, the localized high temperatures in the welding area during thermofusion welding can soften the bumper material, causing uneven heating and dimensional changes in the mounting holes during welding. This is particularly true on the rearward-curving sidewalls at both ends of the bumper, where the mounting holes are inherently angled outwards, making it difficult to maintain uniformity in the sidewalls and increasing their susceptibility to deformation.

[0004] The aforementioned mounting hole deformation issues can cause the mounting base to tilt, become loose, or have excessive assembly gaps, affecting the installation stability of the sensor. It may also damage the sealing structure of the bumper surface, allowing rainwater and dust to seep in and accelerating the aging of internal wiring or sensor components.

[0005] Therefore, there is an urgent need to develop a new process or structural solution that can ensure a reliable connection between the mounting base and the bumper while avoiding deformation of the mounting holes. Summary of the Invention

[0006] The purpose of this invention is to provide a welding fixture for automobile bumpers to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a welding fixture for an automobile bumper, comprising a fixture base plate, a fixture bracket, and a welding bracket, wherein the fixture bracket is disposed on the fixture base plate, and the welding bracket is disposed at both ends of the fixture bracket;

[0008] The tooling bracket is used to support the car bumper, the welding bracket is used to install the welding structure, and the welding structure is used to perform hot melt welding on the mounting hole positions on the inner side of the bumper.

[0009] The tool support comprises side supports and a middle support, the side supports are arranged at two ends of the middle support, and the side supports are used for supporting the bending positions of two ends of the bumper;

[0010] The welding support comprises a bottom support and a sliding support, the bottom support is provided with a pushing air cylinder, the pushing air cylinder is used for pushing the sliding support to move forward and backward, and the bottom support and the sliding support are matched to drive the welding structure to move to a welding operation position;

[0011] The welding structure comprises a hot welding structure and a supporting needle structure, the hot welding structure is installed on the sliding support, the supporting needle structure is installed inside the hot welding structure, the hot welding structure is used for hot melt welding of the installation hole position, and the supporting needle structure is used for supporting the installation hole.

[0012] Preferably, the working surface of the side support is provided with a detachable tool plate, and the top of the tool plate is provided with a clamping clamp.

[0013] Preferably, the middle support is provided with a profiling groove.

[0014] Preferably, the clamping clamp comprises a clamping ring one, a clamping ring two and a screw rod, the roots of the clamping ring one and the clamping ring two are rotatably installed on the same rotating shaft, the rotating shaft is installed in the side support, the ends of the clamping ring one and the clamping ring two are provided with clamping blocks, and the screw rod is connected to the clamping ring one and the clamping ring two through a threaded block.

[0015] The end of the screw rod is provided with an adjusting handle.

[0016] Preferably, the bottom support comprises a supporting side plate, a horizontal plate and a vertical plate, the top of the supporting side plate is supported at two ends of the horizontal plate, the back of the vertical plate is provided with a guide groove block, the guide groove block is connected to a guide rail through a T-shaped groove, and the guide rail is fixedly installed on the horizontal plate.

[0017] Preferably, the sliding support comprises a sliding rail and a sliding plate, the sliding rail is fixedly installed on the outer side of the vertical plate, and the sliding plate is installed on the sliding rail.

[0018] Preferably, the hot welding structure comprises a motor, an adapter shaft and a welding seat, the motor is fixedly installed on the sliding plate, one end of the adapter shaft is fixedly connected to the output shaft of the motor, the other end is connected to a rotating sleeve, and the welding seat is connected to the rotating sleeve.

[0019] The end of the welding seat is provided with a hot welding installation head.

[0020] The outer side of the adapter shaft is provided with a shaft cover.

[0021] An electric actuator is installed on the shaft cover. The output shaft of the electric actuator is connected to the rotating sleeve and can drive the rotating sleeve to move back and forth.

[0022] Preferably, the support pin structure includes a support pin and a mounting base. The support pin is fixedly installed in the mounting base, which is located inside the rotating sleeve and its root is connected to the adapter shaft.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] 1. This invention improves the burrs and flash inside the mounting hole by pre-drilling the support pin structure, while solving the problem of large deformation of the mounting hole in traditional hot melt welding.

[0025] 2. The present invention enables more uniform flow of welding material and improves welding strength through the pre-drilling of the support pin structure. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the present invention;

[0027] Figure 2 This is a front view of the present invention;

[0028] Figure 3 for Figure 2 Top view;

[0029] Figure 4 Drawings of the tooling base plate, tooling bracket, and bottom support structure;

[0030] Figure 5 This is a structural diagram of the clamping pliers;

[0031] Figure 6 This is a diagram of the welded structure.

[0032] Figure 7 This is an exploded view of the support pin structure.

[0033] In the diagram: 1-Tooling base plate; 2-Tooling bracket; 21-Side bracket; 211-Tooling plate; 22-Intermediate bracket; 23-Clamping clamp; 231-Clamping ring one; 232-Clamping ring two; 233-Screw; 234-Clamping block; 235-Threaded block; 3-Welding bracket; 31-Bottom support; 311-Supporting side plate; 312-Horizontal plate; 313-Vertical plate; 32-Sliding support; 321-Sliding rail; 322-Sliding plate; 4-Welding structure; 41-Hot welding structure; 411-Motor; 412-Adapter shaft; 413-Welding seat; 414-Rotating sleeve; 415-Shaft cover; 416-Electric actuator; 42-Support pin structure; 421-Support pin; 422-Mounting seat. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0035] Please see Figures 1 to 7 The present invention provides a technical solution: a welding fixture for an automobile bumper, comprising a fixture base plate 1, a fixture bracket 2, and a welding bracket 3, wherein the fixture bracket 2 is disposed on the fixture base plate 1, and the welding bracket 3 is disposed at both ends of the fixture bracket 2;

[0036] Tooling base plate 1 is a high-strength cast iron plate, which serves as the basic load-bearing platform for the tooling.

[0037] The tooling is fixed to the workshop floor by anchor bolts to prevent welding vibration from causing it to shift.

[0038] The tooling bracket 2 is used to support the car bumper, and the welding bracket 3 is used to install the welding structure 4.

[0039] The tooling bracket 2 includes a side bracket 21 and a middle bracket 22, with the side bracket 21 disposed at both ends of the middle bracket 22;

[0040] The side bracket 21 is an L-shaped sheet metal part, symmetrically arranged on both sides of the tooling base plate 1, and the working surface is equipped with a detachable tooling plate 211.

[0041] The intermediate support 22 is a rectangular frame with a height that matches the curvature of the bumper. The bottom is bolted to the tooling base plate 1, and a contoured groove is opened on the upper surface of the frame.

[0042] The contoured groove of the middle bracket 22 fits the bottom curved surface of the bumper, limiting the vertical displacement of the bumper.

[0043] The tooling plate 211 of the side bracket 21 is fixed to the side of the bracket by bolts to support the side of the bumper.

[0044] The tooling plate 211 is detachable and replaceable, adaptable to different car bumpers, expanding tooling compatibility.

[0045] The welding bracket 3 includes a bottom support 31 and a sliding support 32. The bottom support 31 is provided with a push cylinder 33, which is used to push the sliding support 32 to move back and forth.

[0046] The welding structure 4 includes a hot welding structure 41 and a support pin structure 42. The hot welding structure 41 is mounted on the sliding support 32, and the support pin structure 42 is mounted inside the hot welding structure 41.

[0047] In this embodiment, a detachable tooling plate 211 is provided on the working surface of the side support 21, and a clamping clamp 23 is provided above the tooling plate 211.

[0048] In this embodiment, the intermediate support 22 is provided with a contoured groove.

[0049] In this embodiment, the clamping clamp 23 includes a clamping ring 231, a clamping ring 232, and a screw 233. The roots of the clamping ring 231 and the clamping ring 232 are rotatably mounted on the same rotating shaft, which is installed in the side bracket 21. The ends of the clamping ring 231 and the clamping ring 232 are provided with clamping blocks 234. The screw 233 is connected to the clamping ring 231 and the clamping ring 232 respectively through threaded blocks 235.

[0050] The end of the screw 233 is provided with an adjustment handle;

[0051] Clamping ring 1 231 and clamping ring 232 are semi-circular elastic steel sheets, and their roots are rotatably installed in the side bracket 21 via a rotating shaft;

[0052] Clamping block 234 is a polyurethane block, which is fixed to both ends of the clamping ring by countersunk bolts, and the contact surface has anti-slip texture.

[0053] The screw 233 is a trapezoidal screw, with one end passing through the threaded block 235 and the other end connected to the adjustment handle. The surface of the adjustment handle is knurled for anti-slip.

[0054] Rotating the adjustment handle drives the screw 233 to rotate, pushing the clamping ring 231 and clamping ring 232 to close. The clamping block 234 elastically fits the curved surface of the side of the bumper, preventing the bumper from warping or sliding during the welding process.

[0055] Loosening the adjustment handle allows for quick release of the clamping ring, accommodating the clamping needs of bumpers of different thicknesses.

[0056] In this embodiment, the bottom support 31 includes a support side plate 311, a horizontal plate 312, and a vertical plate 313. The top of the support side plate 311 is supported on both ends of the horizontal plate 312. The back of the vertical plate 313 is provided with a guide groove block. The guide groove block is connected to the guide rail through a T-shaped groove. The guide rail is fixedly installed on the horizontal plate 312.

[0057] The cooperation between the guide rail and the guide slot block provides high-precision linear motion guidance for the sliding support 32;

[0058] The side plate 311 and the horizontal plate 312 are welded together to ensure the overall rigidity of the welded bracket 3 and to avoid deformation of the bracket due to welding pressure.

[0059] The support side panel 311 is L-shaped and 8mm thick; the horizontal panel 312 is a rectangular steel plate with a length matching the width of the bumper; and the vertical panel 313 is a rectangular plate with a thickness of 10mm.

[0060] The top of the supporting side plate 311 is fixed to both ends of the horizontal plate 312 by bolts, and the guide groove block is installed on the back of the vertical plate 313;

[0061] The guide rail is the same length as the horizontal plate 312, with a precision grade of H, and is fixed to the upper surface of the horizontal plate 312, slidingly engaging with the guide groove block.

[0062] In this embodiment, the sliding support 32 includes a sliding track 321 and a sliding plate 322. The sliding track 321 is fixedly installed on the outer side of the upright plate 313, and the sliding plate 322 is installed on the sliding track 321.

[0063] By using an external drive, such as a servo motor or a manual lead screw, the sliding plate 322 is pushed to move along the sliding track 321 to achieve the front and rear position adjustment of the hot welding structure 41 and match the welding position of different mounting holes on the bumper.

[0064] The weight and welding pressure of the hot-welded structure 41 are transferred to the sliding track 321 to ensure smooth movement.

[0065] In this embodiment, the hot welding structure 41 includes a motor 411, a connecting shaft 412, and a welding seat 413. The motor 411 is fixedly mounted on the sliding plate 322. One end of the connecting shaft 412 is fixedly connected to the output shaft of the motor 411, and the other end is connected to the rotating sleeve 414. The welding seat 413 is connected to the rotating sleeve 414.

[0066] The welding seat 413 is provided with a hot welding mounting head at its end;

[0067] The adapter shaft 412 is provided with a shaft cover 415 on its outer side;

[0068] An electric actuator 416 is mounted on the shaft cover 415. The output shaft of the electric actuator 416 is connected to the rotating sleeve 414 and can drive the rotating sleeve 414 to move back and forth.

[0069] Motor 411 is a servo motor, which is fixedly mounted on sliding plate 322;

[0070] The surface of the adapter shaft 412 is high-frequency hardened, one end is connected to the output shaft of the motor 411 through a coupling, and the other end is fixed to the rotating sleeve 414;

[0071] The welding seat 413 is made of graphite and is connected to the front end of the rotating sleeve 414 by bolts. A hot welding head is installed at the end. The internal heating element is a resistance wire with a maximum temperature of 400℃.

[0072] The shaft cover 415 is made of stainless steel, located on the outside of the adapter shaft 412, and is fixed to the sliding plate 322 by bolts.

[0073] The electric actuator 416 is a compact electric cylinder, which is fixedly mounted on the shaft cover 415. The output shaft is connected to the groove on the rotating sleeve 414 through a connecting plate.

[0074] Motor 411 drives adapter shaft 412 to rotate, which in turn drives welding seat 413 to rotate, preventing the bumper from softening during hot melting and wrapping the welding head and support pin 421.

[0075] The graphite welding seat 413 conducts heat quickly, the shaft cover 415 prevents injury from rotating parts, and the electric actuator 416 precisely controls the welding pressure, improving welding consistency.

[0076] In this embodiment, the support pin structure 42 includes a support pin 421 and a mounting base 422. The support pin 421 is fixedly installed in the mounting base 422. The mounting base 422 is located in the rotating sleeve 414 and its root is connected to the adapter shaft 412.

[0077] The support pin 421 is a hard alloy pin, which is fixedly installed in the mounting base 422;

[0078] Mounting base 422 is nested inside rotating sleeve 414, and its root is fixed to the front end of adapter shaft 412 by interference fit.

[0079] Before hot welding, the sliding support 32 drives the support pin 421 into the mounting hole to prevent it from providing support to the hole wall and to prevent deformation during hot melting.

[0080] This reduces the amount of plastic deformation in the welding area, while the thermal conductivity of the support pin 421 accelerates heat diffusion, lowers the peak temperature in the welding area, and further suppresses deformation caused by material softening.

[0081] Working principle: Includes the following steps:

[0082] The tooling base plate 1 is fixed to the workshop floor with anchor bolts, and the tooling plate 211 that matches the bumper model is installed on the side bracket 21.

[0083] Place the bumper in the contoured groove of the middle bracket 22, and align the pre-drilled hole on the side of the bumper with the positioning hole of the tooling plate 211.

[0084] Rotating the adjustment handle drives the screw 223 to rotate, clamping ring 1 221 and clamping ring 222 close, and clamping block 224 elastically clamps the side of the bumper, completing the bumper positioning.

[0085] By pushing the cylinder 33 to push the upright plate 313 and the welding structure 4 to move laterally, they enter the bumper and are aligned with the installation position on the side wall of the bumper. The sliding plate 322 of the sliding support 32 is controlled to move along the sliding track 321 to move the hot welding structure 41 above the target mounting hole of the bumper.

[0086] The electric actuator 416 retracts, causing the hole-breaking needle 421 to protrude from the welding seat 413. Under the continuous drive of the sliding rail 321, the support needle 421 enters the mounting hole. Then, the electric actuator 416 drives the heating plate on the hot welding mounting head of the welding seat 413 to heat melt the area around the hole. After completion, the motor 411 drives the support needle 421 and the welding seat 413 to rotate, preventing the molten plastic from encasing and damaging the bumper product.

[0087] After completion, the electric actuator 416 retracts, and the welding seat 413 moves away from the bumper surface; the sliding plate 322 of the sliding support 32 returns to its initial position.

[0088] Release the clamp 23, remove the welded bumper, and proceed to the next step.

[0089] Based on the above, the present invention improves the burrs and flash inside the mounting hole by pre-drilling the support pin structure, and solves the problem of large deformation of the mounting hole in traditional hot melt welding. The present invention also makes the welding material flow more uniform and improves the welding strength by pre-drilling the support pin structure.

[0090] As is known from common technical knowledge, this invention can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the disclosed embodiments described above are merely illustrative and not exhaustive. All modifications within the scope of this invention or its equivalents are included in this invention.

Claims

1. A welding fixture for automobile bumpers, characterized in that: It includes a tooling base plate (1), a tooling bracket (2), and a welding bracket (3). The tooling bracket (2) is mounted on the tooling base plate (1), and the welding bracket (3) is mounted at both ends of the tooling bracket (2). The tooling bracket (2) is used to support the car bumper, the welding bracket (3) is used to install the welding structure (4), and the welding structure (4) is used to perform hot melt welding on the mounting hole position on the inner side of the bumper; The tooling bracket (2) includes a side bracket (21) and a middle bracket (22). The side bracket (21) is disposed at both ends of the middle bracket (22) and is used to support the bent positions of both ends of the bumper. The welding bracket (3) includes a bottom support (31) and a sliding support (32). The bottom support (31) is provided with a push cylinder (33). The push cylinder (33) is used to push the sliding support (32) to move back and forth. The bottom support (31) and the sliding support (32) cooperate to drive the welding structure (4) to move to the welding operation position. The welding structure (4) includes a hot welding structure (41) and a support pin structure (42). The hot welding structure (41) is installed on the sliding support (32), and the support pin structure (42) is installed inside the hot welding structure (41). The hot welding structure (41) is used for hot melting welding of the mounting hole position, and the support pin structure (42) is used to support the mounting hole.

2. The automotive bumper welding fixture according to claim 1, characterized in that: The working surface of the side support (21) is provided with a detachable tooling plate (211), and a clamping clamp (23) is provided above the tooling plate (211).

3. The automotive bumper welding fixture according to claim 2, characterized in that: The intermediate support (22) is provided with a contoured groove.

4. The automotive bumper welding fixture according to claim 2, characterized in that: The clamping pliers (23) include a clamping ring one (231), a clamping ring two (232), and a screw (233). The roots of the clamping ring one (231) and the clamping ring two (232) are rotatably mounted on the same rotating shaft. The rotating shaft is installed in the side bracket (21). The ends of the clamping ring one (231) and the clamping ring two (232) are provided with clamping blocks (234). The screw (233) is connected to the clamping ring one (231) and the clamping ring two (232) respectively through threaded blocks (235). The end of the screw (233) is provided with an adjustment handle.

5. The automotive bumper welding fixture according to claim 1, characterized in that: The bottom support (31) includes a support side plate (311), a horizontal plate (312), and a vertical plate (313). The top of the support side plate (311) is supported on both ends of the horizontal plate (312). The back of the vertical plate (313) is provided with a guide groove block. The guide groove block is connected to the guide rail through a T-shaped groove. The guide rail is fixedly installed on the horizontal plate (312).

6. The automotive bumper welding fixture according to claim 5, characterized in that: The sliding support (32) includes a sliding rail (321) and a sliding plate (322). The sliding rail (321) is fixedly installed on the outer side of the upright plate (313), and the sliding plate (322) is installed on the sliding rail (321).

7. The automotive bumper welding fixture according to claim 6, characterized in that: The hot welding structure (41) includes a motor (411), a transfer shaft (412), and a welding seat (413). The motor (411) is fixedly mounted on the sliding plate (322). One end of the transfer shaft (412) is fixedly connected to the output shaft of the motor (411), and the other end is connected to the rotating sleeve (414). The welding seat (413) is connected to the rotating sleeve (414). The welding seat (413) is provided with a hot welding mounting head at its end; The adapter shaft (412) is provided with a shaft cover (415) on its outer side; An electric actuator (416) is installed on the shaft cover (415). The output shaft of the electric actuator (416) is connected to the rotating sleeve (414) and can drive the rotating sleeve (414) to move back and forth.

8. The automotive bumper welding fixture according to claim 7, characterized in that: The support pin structure (42) includes a support pin (421) and a mounting base (422). The support pin (421) is fixedly installed in the mounting base (422). The mounting base (422) is located in the rotating sleeve (414) and its root is connected to the adapter shaft (412).

Images