Automotive fender hot melt welding equipment and welding fixtures

Abstract

This utility model discloses a welding fixture for hot-melt welding of automotive fenders, including a machine body and an upper plate. The upper plate is mounted on the upper part of the machine body, and a drive device is installed on the upper plate. Guide pillars are vertically fixed at the four corners of the machine body, and a middle plate is movably sleeved on the outside of the guide pillars. A hot-melt device is installed in the middle of the middle plate. A welding table is also fixedly connected to the machine body, and a template is placed on the top of the welding table. A mold is fixed on the surface of the template. A housing is set at the bottom of the machine body, and two sets of fine-adjustment cylinders are fixedly connected inside the housing. This utility model, by setting up a gear reduction motor, transmission belt, threaded sleeve, threaded rod, middle plate, hot-melt device, hot-melt gun head, template, mold, push rod, fine-adjustment cylinder, and pressure plate cylinder, realizes rapid hot-melt welding operation, increases the safe distance between the operator's hands and the heat source when loading and unloading materials, and avoids the risk of accidental injury or burns.

Description

Technical Field

[0001] This utility model relates to the field of automobile fender processing technology, specifically to welding fixtures for automobile fender hot melt welding equipment. Background Technology

[0002] Car fenders are structural components that cover the exterior of the car body, specifically the outer sides of the front and rear wheels. Their primary function is to prevent mud, water, and other debris from splashing onto the vehicle during driving, while also serving an aesthetic and aerodynamic purpose. Fenders are typically composed of a metal sheet and a plastic backing, which are securely joined together using a hot-melt welding process during production and assembly.

[0003] Common hot melt welding fixtures typically include a fixed template assembly and a set of liftable hot melt gun devices. Before welding, the operator places the fender workpiece in the bottom template and fixes it. Then, the hot melt gun moves downward from the top to heat and press the contact area to complete the welding. After welding is completed, the hot melt gun rises, and the operator removes the workpiece to complete the loading and unloading operation.

[0004] However, the fender hot melt welding fixtures currently on the market still have some defects. For example, the hot melt gun has a fixed movement path and only has a one-way up and down lifting function. When the template is in the middle, it is completely stationary. This causes the hot melt gun to occupy most of the vertical space when it is descending, which makes it easy for the operator's hand to interfere with the hot melt gun when loading and unloading materials, which poses a risk of burns and affects safety.

[0005] Therefore, there is an urgent need to design new welding fixtures for hot-melt welding of automotive fenders to address the aforementioned technical deficiencies. Utility Model Content

[0006] The purpose of this utility model is to provide welding fixtures for automotive fender hot melt welding equipment, so as to solve the problem mentioned in the background art that the operator's hands are prone to interference with the hot melt gun when loading and unloading materials, which poses a risk of burns.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a welding fixture for automotive fender hot melt welding equipment, comprising a body and an upper plate. The upper plate is mounted on the upper part of the body, and a driving device is installed on the upper plate. Guide pillars are vertically fixed at the four corners of the body, and a middle plate is movably sleeved on the outside of the guide pillars. A hot melt device is installed in the middle of the middle plate. A welding table is also fixedly connected to the body, and a template is placed on the top of the welding table. A mold is fixed on the surface of the template. A housing is provided at the bottom of the body, and two sets of fine-tuning cylinders are fixedly connected inside the housing. A push rod is fixedly connected to the piston end of the fine-tuning cylinder, and the top end of the push rod passes through the welding table and is fixed to the bottom end of the template. Pressure plate cylinders are also fixedly connected to both sides of the housing, and a pressure plate is fixedly connected to the piston end of the pressure plate cylinder through the welding table. The pressure plate presses against the two edges of the template.

[0008] As a further technical solution of this utility model, the hot melt device is fixed in the center of the middle layer plate, and a hot melt gun holder is fixedly connected to the bottom end of the middle layer plate. Multiple sets of hot melt gun heads are fixedly installed at the hot melt gun holder, and the hot melt gun heads are located directly above the mold.

[0009] As a further technical solution of this utility model, the driving device includes a set of gear reduction motors fixed in the middle of the upper plate. Threaded sleeves are provided on both sides of the gear reduction motors. The threaded sleeves are rotatably connected to the upper plate. A transmission belt is connected between the output shaft of the gear reduction motor and the threaded sleeves. The output shaft of the gear reduction motor drives the threaded sleeves to rotate through the transmission belt. Threaded rods are threadedly connected to each threaded sleeve.

[0010] As a further technical solution of this utility model, the bottom end of the threaded rod is movably assembled on the surface of the middle layer plate, and the top end of the threaded rod extends from the machine body to the outside.

[0011] As a further technical solution of this utility model, flexible guide rails are fixedly connected to both sides of the machine body, and the flexible guide rails are fixedly connected to the middle plate.

[0012] As a further technical solution of this utility model, an indicator panel is installed on the upper front end of the machine body, an indicator light is installed on the left side of the indicator panel, and a control console is also installed on the front end of the machine body.

[0013] As a further technical solution of this utility model, side door panels are installed on both sides of the body. The side door panels are split and have circular viewing holes machined on their surfaces.

[0014] As a further technical solution of this utility model, the four corners of the bottom of the machine body are fixedly connected with feet, and one side of each foot is equipped with a caster wheel.

[0015] Compared with the prior art, the beneficial effects of this utility model are: by setting up a gear reduction motor, transmission belt, threaded sleeve, threaded rod, middle layer plate, hot melt device, hot melt gun head, template, mold, top rod, fine adjustment cylinder and pressure plate cylinder, the hot melt welding operation is realized quickly, and the safe distance between the operator's hands and the heat source is increased when loading and unloading materials, avoiding the risk of accidental injury or burn.

[0016] By incorporating a middle layer plate, a hot melt device, a drive device, a hot melt gun head, a mold, a template, guide pillars, and a flexible guide rail, a "upper layer drive, middle layer hot melt, lower layer material" structure is achieved, ensuring welding accuracy and personnel safety.

[0017] By incorporating an indicator panel, indicator lights, side doors, feet, casters, and a control console, the equipment achieves real-time status display, safety protection, and convenient movement, separating human and machine operations, reducing operational intensity and human error rates, and improving the automation level of the welding production line. Attached Figure Description

[0018] Figure 1 This is a front view cross-sectional structural diagram of the present invention;

[0019] Figure 2 This is a side view of the structure of this utility model;

[0020] Figure 3 This is a three-dimensional top view of the structure of this utility model;

[0021] Figure 4 This is a three-dimensional upward view of the structure of this utility model.

[0022] In the diagram: 1. Body; 2. Flexible guide rail; 3. Drive unit; 4. Upper plate; 5. Guide post; 6. Middle plate; 7. Threaded rod; 8. Gear reducer motor; 9. Transmission belt; 10. Threaded sleeve; 11. Hot melt device; 12. Hot melt gun holder; 13. Hot melt gun head; 14. Mold; 15. Template; 16. Pressing plate; 17. Pressing plate cylinder; 18. Welding table; 19. Top rod; 20. Fine adjustment cylinder; 21. Chassis; 22. Foot; 23. Casters; 24. Indicator light; 25. Side door panel; 26. Control console; 27. Indicator panel. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-4 An embodiment of this utility model provides a welding fixture for hot-melt welding of automobile fenders, including a body 1 and an upper plate 4. The upper plate 4 is mounted on the upper part of the body 1, and a drive device 3 is installed on the upper plate 4. A hot-melt device 11 is installed in the middle of the middle plate 6. The body 1 is also fixedly connected to a welding table 18, and a template 15 is placed on the top of the welding table 18. A mold 14 is fixed on the surface of the template 15. A housing 21 is set at the bottom of the body 1. Two sets of fine-tuning cylinders 20 are fixedly connected inside the housing 21. A push rod 19 is fixedly connected to the piston end of the fine-tuning cylinder 20. The top end of the push rod 19 passes through the welding table 18 and is fixed to the bottom end of the template 15.

[0025] Specifically, such as Figure 1 and Figure 2 As shown, the fine-tuning cylinder 20 inside the welding table 18 is model MGPM16-25Z. It drives the push rod 19 to push the template 15 upward, raising the template 15 and the mold 14 fixed on the surface to make precise contact with the hot melt gun head 13, realizing the rapid hot melt welding of the metal fender and the plastic liner. The entire lifting and welding process can be completed in just a few seconds. After welding, the fine-tuning cylinder 20 and the gear reduction motor 8 retract synchronously, and the template 15 falls back to the welding table 18. Since the hot melt device 11 is fixed to the middle plate 6, after it rises, it completely lifts the hot melt gun head 13 away from the mold 14. Personnel loading and unloading are always carried out in a state where the hot melt gun head 13 is far away.

[0026] Inside the chassis 21, pressure plate cylinders 17 are also fixedly connected to both sides. The piston end of the pressure plate cylinder 17 passes through the welding table 18 and is fixedly connected to a pressure plate 16. The pressure plate 16 presses against the two sides of the template 15.

[0027] Specifically, such as Figure 1 and Figure 2 As shown, after welding is completed, the fine-tuning cylinder 20 and the gear reduction motor 8 retract synchronously, the template 15 falls back, and the pressure plate cylinder 17, model CDQ2A32-20DMZ, clamps the pressure plate 16 tightly against the edge of the template 15, effectively preventing the template 15 from shaking and shifting, and ensuring stable precision after welding.

[0028] The drive unit 3 includes a set of gear reducer motors 8 fixed in the middle of the upper plate 4. Threaded sleeves 10 are provided on both sides of the gear reducer motors 8. The threaded sleeves 10 are rotatably connected to the upper plate 4. A transmission belt 9 is connected between the output shaft of the gear reducer motors 8 and the threaded sleeves 10. The output shaft of the gear reducer motors 8 drives the threaded sleeves 10 to rotate through the transmission belt 9. Threaded rods 7 are threadedly connected to the threaded sleeves 10. The bottom end of the threaded rods 7 is movably mounted on the surface of the middle plate 6. The top end of the threaded rods 7 extends from the body 1 to the outside.

[0029] Specifically, such as Figure 1 and Figure 2 As shown, the gear reduction motor 8, model RV-30-NMRV, is installed in the center of the drive device 3. When the welding operation begins, its output shaft drives two sets of threaded sleeves 10 to rotate synchronously and in the same direction through the transmission belt 9. Two sets of threaded rods 7 are screwed inside the threaded sleeves 10. During the rotation, the middle plate 6 is pushed vertically and smoothly downward, so that the hot melt device 11 and hot melt gun head 13 installed on it are aligned with the workpiece area above the mold 14.

[0030] Inside the body 1, there are guide posts 5 fixed vertically at the four corners. The guide posts 5 are movably sleeved with a middle layer plate 6. Flexible guide rails 2 are fixedly connected to both sides inside the body 1. The flexible guide rails 2 are fixedly connected to the middle layer plate 6.

[0031] Specifically, such as Figure 1 and Figure 2 As shown, the middle layer plate 6 is supported and guided by four guide posts 5. Each guide post 5 adopts an axial rolling guide rail structure. The flexible guide rail 2 has buffering and anti-lateral shaking functions, which can help the middle layer plate 6 maintain a vertical state when it is raised and lowered, ensuring that the welding operation is stable and does not deviate.

[0032] The hot melt device 11 is fixed in the center of the middle layer plate 6. A hot melt gun holder 12 is fixedly connected to the bottom of the middle layer plate 6. Multiple sets of hot melt gun heads 13 are fixedly installed at the hot melt gun holder 12. The hot melt gun heads 13 are located directly above the mold 14.

[0033] Specifically, such as Figure 1 and Figure 2 As shown, the hot melt device 11 is fixed to the center of the middle layer plate 6 by the mounting plate. The hot melt device 11 is model HL-HM800W and has automatic temperature control and quick-change gun head function. The hot melt gun holder 12 is connected below it and fixes multiple sets of hot melt gun heads 13. The hot melt gun heads 13 are located directly above the mold 14. The mold 14 is fixed to the surface of the template 15 to form a welding area, forming a three-layer separation structure of "upper layer drive, middle layer hot melt, and lower layer material".

[0034] An indicator panel 27 is installed on the upper front of the body 1. An indicator light 24 is installed on the left side of the indicator panel 27. A control console 26 is also installed on the front of the body 1. Side doors 25 are installed on both sides of the body 1. The side doors 25 are double-opening. Circular viewing holes are machined on the surface of the side doors 25. Foot 22 is fixedly connected to the four corners of the bottom of the body 1. Universal wheels 23 are installed on one side of each foot 22.

[0035] Specifically, such as Figure 1 and Figure 2 As shown, an indicator panel 27 is installed on the upper front of the machine body 1, which displays the system current, temperature, working process, and alarm status in real time. A three-color indicator light 24 is installed on its left side, which illuminates yellow during the hot-melt process, green after completion, and red for abnormal faults, making it convenient for operators to identify the equipment's operating status from a distance. Side doors 25 are installed on both sides of the machine body 1, with a split structure design and transparent viewing holes on the door surface, which facilitates observation of the internal hot-melt structure, prevents accidental contact and foreign object entry, and improves the service life of electrical components. Foot 22 is installed at the four corners of the bottom of the machine body 1, and it is equipped with casters 23, which facilitates free movement and fixation of the equipment. The entire system is centrally controlled through a front control console 26, allowing operators to complete debugging and parameter settings without entering the side and rear areas.

[0036] Working principle: The operator places the fender to be welded into the mold 14 on the template 15 and positions it. After confirming that it is in place, the control console 26 is started to begin the welding process. At this time, the drive device 3 installed on the upper plate 4 is activated. The gear reduction motor 8 drives the two sets of threaded sleeves 10 to rotate synchronously through the transmission belt 9, causing the threaded rods 7 connected inside to move vertically, pushing the middle plate 6 to descend smoothly, and bringing the hot melt device 11 installed on it closer to the fender surface. Then, the fine-tuning cylinder 20 inside the welding table 18 is activated. The push rod 19 slowly pushes the template 15 upward, bringing the fender close to the hot melt gun head 13 below the middle plate 6. The plastic liner is then heated and pressed together. After the hot melt is completed, the gear reduction motor 8 reverses to drive the middle plate 6 upward, the fine adjustment cylinder 20 retracts, the template 15 descends to the initial position, and the pressure plate cylinder 17 activates to clamp the two sides of the template 15 with the pressure plate 16 to ensure its stability and prevent shaking. After the hot melt head 13 has fully risen, the operator can safely remove the welded fender from the mold 14 and proceed to the next cycle.

[0037] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A welding tool for hot melt welding of a fender of an automobile, comprising a machine body (1) and an upper plate (4), characterized in that: An upper plate (4) is mounted on the upper part of the body (1), and a drive device (3) is installed on the upper plate (4); The body (1) has guide posts (5) fixed vertically at the four corners inside. The guide posts (5) are movably sleeved with a middle layer plate (6). A hot melt device (11) is installed in the middle of the middle layer plate (6). The body (1) is also fixedly connected to a welding table (18), a template (15) is placed on the top of the welding table (18), and a mold (14) is fixed on the surface of the template (15). The machine body (1) is equipped with a box (21) at the bottom. Two sets of fine-tuning cylinders (20) are fixedly connected inside the box (21). The piston end of the fine-tuning cylinder (20) is fixedly connected to a push rod (19). The top end of the push rod (19) passes through the welding table (18) and is fixed to the bottom end of the template (15). The two sides of the machine body (21) are also fixedly connected to pressure plate cylinders (17). The piston end of the pressure plate cylinder (17) passes through the welding table (18) and is fixedly connected to a pressure plate (16). The pressure plate (16) presses against the two sides of the template (15).

2. The welding fixture for the automotive fender hot melt welding equipment according to claim 1, characterized in that: The hot melt device (11) is fixed in the center of the middle layer plate (6). A hot melt gun holder (12) is fixedly connected to the bottom of the middle layer plate (6). Multiple sets of hot melt gun heads (13) are fixedly installed at the hot melt gun holder (12). The hot melt gun heads (13) are located directly above the mold (14).

3. The welding fixture for the automotive fender hot melt welding equipment according to claim 1, characterized in that: The drive device (3) includes a set of gear reducer motors (8) fixed in the middle of the upper plate (4). Both sides of the gear reducer motor (8) are provided with threaded sleeves (10). The threaded sleeves (10) are rotatably connected to the upper plate (4). A transmission belt (9) is connected between the output shaft of the gear reducer motor (8) and the threaded sleeves (10). The output shaft of the gear reducer motor (8) drives the threaded sleeves (10) to rotate through the transmission belt (9). Threaded rods (7) are threadedly connected inside the threaded sleeves (10).

4. The welding fixture for the automotive fender hot melt welding equipment according to claim 3, characterized in that: The bottom end of the threaded rod (7) is movably mounted on the surface of the middle layer plate (6), and the top end of the threaded rod (7) extends from the body (1) to the outside.

5. The welding fixture for the automotive fender hot melt welding equipment according to claim 1, characterized in that: Flexible guide rails (2) are fixedly connected to both sides of the body (1), and the flexible guide rails (2) are fixedly connected to the middle plate (6).

6. The welding fixture for the automotive fender hot-melt welding equipment according to claim 1, characterized in that: An indicator panel (27) is installed on the upper front end of the body (1), and an indicator light (24) is installed on the left side of the indicator panel (27). A control console (26) is also installed on the front end of the body (1).

7. The welding fixture for the automotive fender hot melt welding equipment according to claim 1, characterized in that: The body (1) is equipped with side door panels (25) on both sides. The side door panels (25) are split-opening and have circular viewing holes on their surfaces.

8. The welding fixture for the automotive fender hot melt welding equipment according to claim 1, characterized in that: The bottom of the machine body (1) is fixedly connected to four corners with feet (22), and each foot (22) is equipped with a caster wheel (23) on one side.

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