A composite overlock device

Abstract

The application relates to the technical field of mechanical processing, in particular to a composite edge rolling device which comprises an edge rolling mechanism and a welding gripper mechanism, the edge rolling mechanism and the welding gripper mechanism are adjacent and are arranged on the same support, a rolling assembly and a driving assembly are arranged on the edge rolling mechanism, the output end of the driving assembly is connected with the rolling assembly and is used for driving the rolling assembly to roll the outer covering of a body in white, the welding gripper mechanism is provided with a clamping jaw used for clamping the outer covering of the body in white, and the clamping jaw and the output end of the rolling assembly are at the same height. The application has the advantages of improving production efficiency and coordination, reducing equipment floor area and complexity, reducing overall cost, and being capable of efficiently and accurately completing the effect of the coating process while clamping the outer covering of the body in white during processing.

Description

Technical Field

[0001] This application relates to the technical field of machining, and in particular to a composite hemming device. Background Technology

[0002] In the automotive manufacturing industry, the processing technology of body-in-white (BIB) exterior panels has always been an important research area. With the continuous development of the automotive industry, higher demands are being placed on the quality and production efficiency of BIB exterior panels. Proper processing of BIB exterior panels can not only improve the overall appearance and performance of a vehicle, but also reduce production costs and improve economic efficiency to a certain extent. Therefore, continuous innovation and improvement of related technologies are crucial for automotive manufacturers.

[0003] Regarding the hemming process for body-in-white exterior panels, since the outer panel typically wraps continuously over the inner panel, a roller method is usually used for processing. This roller processing method utilizes the rolling motion of the rollers to achieve the wrapping of the outer panel over the inner panel. There is also a method of directly folding the outer panel. In terms of the gripper structure, the usual gripper only performs the gripping operation. When encountering situations involving hemming both inner and outer panels, an additional station is added, using a folding die to complete the wrapping process of the inner and outer panels.

[0004] However, the independent operation of the gripper and the rolling mechanism increases the difficulty of machining the parts, reduces efficiency, and results in insufficient precision after machining. Utility Model Content

[0005] In order to efficiently and accurately complete the wrapping process while clamping the outer body panels during the processing of body-in-white outer panels, the purpose of this application is to provide a composite edge rolling device, which adopts the following technical solution: Including the hemming mechanism and the welding gripper mechanism; The hemming mechanism and the welding gripper mechanism are adjacent to each other and are both mounted on the same bracket; The hemming mechanism is provided with a rolling assembly and a driving assembly. The output end of the driving assembly is connected to the rolling assembly and is used to drive the rolling assembly to hem the outer covering of the body-in-white. The welding gripper mechanism is equipped with grippers for holding the body-in-white outer covering, and the grippers are at the same height as the output end of the rolling assembly.

[0006] By adopting the above technical solution, the device achieves a compact structure and space saving. At the same time, since the gripper and the output end of the rolling assembly are at the same height, it is convenient to perform clamping operations simultaneously during the rolling process, which improves production efficiency and coordination, reduces the equipment's floor space and complexity, and lowers the overall cost. It can efficiently and accurately complete the wrapping process while clamping the outer body panels during the processing of body-in-white outer panels.

[0007] Optionally, the rolling assembly includes a pressure arm, a rear tail wheel, a guide wheel, a pressure roller, and a fixed bracket; The output end of the drive assembly is hinged to the pressure arm, the guide wheel is located in the middle of the pressure arm, the pressure wheel is located at the top of the pressure arm, and the rear tail wheel is located at the bottom of the pressure arm.

[0008] By adopting the above technical solution, a stable rolling mechanism is provided. The drive component and the pressure arm are hinged to ensure the effective transmission of power, while the arrangement of the guide wheel and pressure wheel optimizes the rolling pressure distribution, enhances the stability and accuracy of the rolling process, and thus improves the rolling quality and consistency.

[0009] Optionally, the fixed bracket includes a fixed connection hole and a support block fixing hole, wherein the fixed connection hole has a two-pin, four-thread structure and the support block fixing hole has a two-pin, two-thread structure.

[0010] By adopting the above technical solution, a secure installation and positioning are provided, reducing the risk of loosening, ensuring the stability and reliability of the device, while simplifying the installation and maintenance process and improving operational efficiency.

[0011] Optionally, the bottom of the fixed bracket is provided with a tail wheel groove, the tail wheel groove including a long groove section and a wedge-shaped opening section, the long groove section and the wedge-shaped opening section being connected.

[0012] By adopting the above technical solution, the rear tail wheel can move smoothly and be precisely positioned in the groove. The wedge-shaped opening section facilitates the entry and exit of the wheel, enhances the flexibility and adaptability of the device, makes the hemming process smoother, and reduces jamming and wear.

[0013] Optionally, the fixed bracket is provided with a guide groove, the guide wheel slides along the guide groove and can rotate, and when the drive assembly drives the pressure arm to slide along the guide groove to the end, the pressure arm rotates around the guide wheel to drive the pressure wheel to apply continuous rolling pressure to the plate.

[0014] By adopting the above technical solution, the sliding and rotational movements of the pressure arm are realized. When the driving component drives the pressure arm to slide along the guide groove to the end, the pressure arm rotates around the guide wheel, thereby driving the pressure wheel to apply continuous rolling pressure to the plate. This mechanism ensures the smooth transition and continuity of the rolling action, avoids sudden force changes, and improves the uniformity and surface quality of the rolling edge.

[0015] Optionally, the drive assembly is hinged to the fixed bracket via a hinge hole located below the tail wheel groove.

[0016] By adopting the above technical solutions, the force transmission path is optimized, making the drive more direct and efficient, reducing the additional stress caused by the leverage effect, while enhancing the compactness and stability of the structure and reducing the wear and failure rate of moving parts.

[0017] Optionally, two auxiliary wheels are symmetrically arranged on the side of the pressure arm. The auxiliary wheels are tactilely connected to the fixed bracket and are used to assist in supporting the movement of the pressure arm.

[0018] By adopting the above technical solution, additional support and guidance are provided, reducing friction and swaying of the pressure arm during movement, enhancing the smoothness and precision of the movement, extending the service life of the device, and reducing maintenance requirements.

[0019] Optionally, the sidewall of the fixed bracket is provided with weight-reducing holes, which are arranged vertically.

[0020] By adopting the above technical solutions, the weight of the support frame is effectively reduced, material costs and energy consumption are lowered, and the structural strength and rigidity are maintained through reasonable layout, which facilitates the handling, installation and adjustment of the device and improves the portability and economy of the device.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. The device achieves a compact structure and space saving. At the same time, since the gripper and the output end of the rolling assembly are at the same height, it is easy to perform clamping operations simultaneously during the rolling process, which improves production efficiency and coordination, reduces the equipment's floor space and complexity, and lowers the overall cost. It can efficiently and accurately complete the wrapping process while clamping the outer body panels during the processing of body-in-white outer panels. 2. The cooperation between the guide wheel and the guide groove, combined with the rotational motion of the pressure arm end, allows the pressure wheel to apply continuous and smooth rolling pressure to the sheet metal, effectively avoiding wrinkles or deformation that may occur with traditional methods, and ensuring extremely high rolling quality. Meanwhile, the symmetrically arranged auxiliary wheels provide additional support for the pressure arm, enhancing the stability of movement, while the rational layout of the tail wheel groove and hinge hole optimizes force transmission, making the entire system more reliable. 3. The fixed bracket adopts a robust connection method such as "two pins and four threads," ensuring the rigidity and stability of the equipment under long-term high-load operation and reducing maintenance frequency. The weight-reducing hole design on the side wall reduces the weight of the equipment and manufacturing costs while ensuring structural strength. These designs collectively improve the durability of the device, reduce the overall cost of use over its life cycle, and make it both high-performance and high-efficiency. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the composite hemming device; Figure 2This is a schematic diagram of the hemming mechanism; Figure 3 This is a structural diagram of the fixed bracket; Figure 4 This is a schematic diagram of the hemming mechanism under normal operating conditions; Figure 5 This is a schematic diagram of the pressure arm in the rolled edge mechanism in the raised state. Figure 6 This is a schematic diagram of the hemming mechanism performing the hemming process; In the picture, 1. Rolling mechanism; 11. Rolling assembly; 111. Pressure arm; 112. Rear tail wheel; 113. Guide wheel; 114. Pressure roller; 115. Fixed bracket; 1151. Fixed connection hole; 1152. Support block fixing hole; 1153. Tail wheel groove; 1154. Guide groove; 1155. Hinge hole; 1156. Weight reduction hole; 12. Drive assembly; 13. Auxiliary wheel; 2. Welding gripper mechanism, 21. Gripper; 3. Bracket. Detailed Implementation

[0023] The following is in conjunction with the appendix Figure 1 - Appendix Figure 6 This application will be described in further detail below.

[0024] A composite hemming device, as shown in the reference Figure 1 The device includes a rolling edge mechanism 1 and a welding gripper mechanism 2. The rolling edge mechanism 1 and the welding gripper mechanism 2 are adjacent to each other and both are mounted on the same bracket 3. This layout makes the entire device compact, easy to operate and maintain, and improves the integration and space utilization of the equipment. The rolling edge mechanism 1 is equipped with a rolling assembly 11 and a drive assembly 12. The output end of the drive assembly 12 is connected to the rolling assembly 11 and is used to drive the rolling assembly 11 to roll the outer body panel. The welding gripper mechanism 2 is equipped with a gripper 21 for holding the outer body panel. The gripper 21 is at the same height as the output end of the rolling assembly 11, ensuring that the gripper 21 can stably hold the outer body panel during processing, while the rolling assembly 11 can accurately roll it, improving the processing accuracy and stability.

[0025] Specifically, refer to Figure 2 The rolling assembly 11 includes a pressure arm 111, a rear tail wheel 112, a guide wheel 113, a pressure roller 114, and a fixed bracket 115. The pressure arm 111 is the main force-bearing component of the rolling assembly 11. It moves under the action of the drive assembly 12, thereby driving other components to complete the rolling operation.

[0026] Furthermore, the rear tail wheel 112 is located at the bottom of the pressure arm 111. It can be a regular rubber wheel or, depending on the actual needs, a polyurethane wheel, which has good wear resistance and elasticity. The rear tail wheel 112 is connected to the bottom of the pressure arm 111 through a shaft hole, in which a bearing can be installed to reduce friction and improve rotational flexibility. The guide wheel 113 is located in the middle of the pressure arm 111. It is usually made of metal materials, such as stainless steel or aluminum alloy. These materials have high strength and hardness, ensuring that the guide wheel 113 is not easily deformed during operation.

[0027] Furthermore, the guide wheel 113 is connected to the shaft hole in the middle of the pressure arm 111 via a shaft. An interference fit can be used between the shaft and the shaft hole to ensure a secure connection between the guide wheel 113 and the pressure arm 111. The guide wheel 113 engages with the guide groove 1154 on the fixed bracket 115, guiding the movement direction of the pressure arm 111. The pressure wheel 114 is located at the top of the pressure arm 111. It is a component that directly acts on the body-in-white exterior panel and is typically made of high-hardness alloy steel to ensure sufficient pressure is applied to the panel. The pressure wheel 114 is connected to the shaft hole at the top of the pressure arm 111 via a shaft. A bearing can be installed between the shaft and the shaft hole to allow the pressure wheel 114 to rotate freely. The surface of the pressure wheel 114 can undergo special treatments, such as chrome plating, to improve its wear resistance and corrosion resistance.

[0028] Furthermore, the drive assembly 12 drives the pressure arm 111 to move, and the rear tail wheel 112 moves within the tail wheel groove 1153 to ensure the stable lifting of the pressure arm 111; the guide wheel 113 slides within the guide groove 1154 to guide the movement direction of the pressure arm 111; the pressure roller 114 rolls the sheet metal as the pressure arm 111 moves. This combination allows the rolling assembly 11 to achieve precise edge rolling operations, completing the edge rolling process through rolling friction and continuous angle changes, avoiding the problems of surface scratches and easy wear of the pressure block caused by dry friction in traditional edge-folding methods.

[0029] Furthermore, the drive assembly 12 uses an electric linear actuator instead of a linear cylinder. The electric linear actuator offers advantages such as high precision and convenient control. The output end of the electric linear actuator is also hinged to the pressure arm 111. Driven by a motor, the actuator's push rod can extend and retract, thereby moving the pressure arm 111. The electric linear actuator can be precisely adjusted using a controller, better meeting the needs of different hemming processes.

[0030] The use of an electric linear actuator as the drive component 12 improves the control precision and flexibility of the hemming device. The electric linear actuator can precisely control the movement speed and stroke of the pressure arm 111 according to different processing requirements, further improving the quality and efficiency of the hemming process. At the same time, the electric linear actuator is relatively easy to maintain, reducing equipment maintenance costs.

[0031] Specifically, refer to Figure 2 and Figure 3 The fixed bracket 115 includes a fixed connecting hole 1151 and a support block fixing hole 1152. The fixed connecting hole 1151 has a two-pin, four-thread structure, providing a stable connection that allows the entire hemming mechanism 1 to be fixed to the bracket 3 or the fixture table. During actual installation, two locating pins are first inserted into their corresponding holes for positioning, and then bolts are used to tighten the connection through the four threaded holes, ensuring a secure connection. The support block fixing hole 1152 has a two-pin, two-thread structure and is used to install the support block. The support block provides pressure support to the parts during the hemming process, ensuring the smooth progress of the hemming process. Similarly, it is first positioned using two locating pins, and then tightened with two bolts.

[0032] Furthermore, the bottom of the fixed bracket 115 is provided with a tail wheel groove 1153, which includes a long groove section and a wedge-shaped opening section, with the long groove section communicating with the wedge-shaped opening section. The function of the long groove section is to allow the rear tail wheel 112 to cooperate with the guide wheel 113 to stably and linearly lift the pressure arm 111 along the cylinder direction, while the wedge-shaped opening section is to meet the requirements of the pressure arm 111 swinging. When the pressure arm 111 performs linear movement, the rear tail wheel 112 rolls within the long groove section; when swinging movement is required, the rear tail wheel 112 can smoothly pass through the wedge-shaped opening section to realize the swinging of the pressure arm 111.

[0033] Furthermore, the fixed bracket 115 is provided with a guide groove 1154, and the guide wheel 113 slides and rotates along the guide groove 1154. When the drive assembly 12 drives the pressure arm 111 to slide along the guide groove 1154 to the end, the pressure arm 111 rotates around the guide wheel 113 to drive the pressure wheel 114 to apply continuous rolling pressure to the plate. The shape and size of the guide groove 1154 are precisely designed to ensure that the guide wheel 113 slides smoothly in it, and in the second step of pressing, the guide wheel 113 can rotate smoothly at the top of the guide groove 1154, thereby realizing the swing arm movement of the pressure arm 111, so that the pressure wheel 114 can press the plate from 90° to the pressed state.

[0034] Furthermore, the drive assembly 12 is hinged to the fixed bracket 115 via a hinge hole 1155, which is located below the tail wheel groove 1153. This arrangement allows the drive assembly 12 to flexibly drive the pressure arm 111 while ensuring the stability of the entire mechanism. The drive assembly 12 can be a linear cylinder, which has advantages such as simple structure, smooth operation, and large thrust. The piston rod of the linear cylinder is connected to the pressure arm 111 via a hinge, and when the piston rod extends or retracts, it drives the pressure arm 111 to move.

[0035] Furthermore, two auxiliary wheels 13 are symmetrically arranged on the side of the pressure arm 111. The auxiliary wheels 13 are rolledly connected to the fixed bracket 115 and are used to assist in supporting the movement of the pressure arm 111. The auxiliary wheels 13 are usually made of plastic, such as polyoxymethylene (POM), which has self-lubricating properties and can reduce friction with the fixed bracket 115. The auxiliary wheels 13 are connected to the shaft hole on the side of the pressure arm 111 through a shaft. A bearing can be installed between the shaft and the shaft hole, allowing the auxiliary wheels 13 to rotate flexibly. During the movement of the pressure arm 111, the auxiliary wheels 13 roll along the surface of the fixed bracket 115, playing a role in auxiliary support and guidance, ensuring that the movement of the pressure arm 111 is more stable.

[0036] Furthermore, weight-reducing holes 1156 are provided through the side wall of the fixed bracket 115, and the weight-reducing holes 1156 are arranged vertically. The weight-reducing holes 1156 can reduce the weight of the fixed bracket 115 and reduce the load on the entire device, without affecting the strength and stability of the fixed bracket 115. The shape of the weight-reducing holes 1156 can be designed according to actual needs, such as circular or square.

[0037] Reference Figure 4 When the device is not in operation, the hemming mechanism 1 is in its normal state; refer to Figure 5 When the gripper 21 clamps the body-in-white outer panel, the drive assembly 12 drives the rolling assembly 11 to rise, and the pressure roller 114 bends the outer panel of the body-in-white outer panel at a 90-degree angle; refer to Figure 6 The drive assembly 12 continues to apply upward force. At this time, the guide wheel 113 is located at the end of the guide groove 1154 and cannot continue to rise. The pressure arm 111 will rotate around the guide wheel 113 as the center of rotation. The rear tail wheel 112 moves from the long groove section to the wedge-shaped opening section. The uppermost pressure wheel 114 rolls the outer panel. Then, the above operation is repeated to tightly wrap the outer panel around the inner panel, completing the rolling edge processing of the partial wrapping of the body-in-white outer panel.

[0038] The implementation principle of this embodiment is as follows: The composite hemming device integrates the hemming mechanism 1 and the welding gripper mechanism 2 onto the same bracket 3, realizing integrated operation of gripping and hemming processes, saving processing cycle time and station costs. Driven by the drive component 12, the rolling assembly 11 utilizes the synergistic effect of the rear tail wheel 112, guide wheel 113, and pressure roller 114 to complete the hemming process through rolling friction and continuous angle variation, avoiding many problems of traditional folding methods and improving processing quality and efficiency. Simultaneously, the rational design of the fixed bracket 115 and the precise coordination of each component ensure the stability and reliability of the entire device, making it suitable for hemming processing of partial coverings on body-in-white exterior parts.

[0039] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A composite hemming device, characterized in that, It includes a hemming mechanism (1) and a welding gripper mechanism (2); The rolling edge mechanism (1) is adjacent to the welding gripper mechanism (2) and both are mounted on the same bracket (3); The hemming mechanism (1) is provided with a rolling assembly (11) and a drive assembly (12). The output end of the drive assembly (12) is connected to the rolling assembly (11) and is used to drive the rolling assembly (11) to hem the outer covering of the body-in-white. The welding gripper mechanism (2) is provided with a gripper (21) for holding the body-in-white outer covering, and the gripper (21) is at the same height as the output end of the rolling assembly (11).

2. The composite hemming device according to claim 1, characterized in that, The rolling assembly (11) includes a pressure arm (111), a rear tail wheel (112), a guide wheel (113), a pressure roller (114), and a fixed bracket (115). The output end of the drive assembly (12) is hinged to the pressure arm (111), the guide wheel (113) is located in the middle of the pressure arm (111), the pressure wheel (114) is located at the top of the pressure arm (111), and the tail wheel (112) is located at the bottom of the pressure arm (111).

3. The composite hemming device according to claim 2, characterized in that, The fixed bracket (115) includes a fixed connection hole (1151) and a support block fixing hole (1152). The fixed connection hole (1151) is a two-pin four-thread structure, and the support block fixing hole (1152) is a two-pin two-thread structure.

4. The composite hemming device according to claim 3, characterized in that, The bottom of the fixed bracket (115) is provided with a tail wheel groove (1153), the tail wheel groove (1153) includes a long groove section and a wedge-shaped opening section, the long groove section and the wedge-shaped opening section are connected.

5. A composite hemming device according to claim 3, characterized in that, The fixed bracket (115) is provided with a guide groove (1154). The guide wheel (113) slides and rotates along the guide groove (1154). When the drive assembly (12) drives the pressure arm (111) to slide along the guide groove (1154) to the end, the pressure arm (111) rotates around the guide wheel (113) to drive the pressure wheel (114) to apply continuous rolling pressure to the plate.

6. A composite hemming device according to claim 4, characterized in that, The drive assembly (12) is hinged to the fixed bracket (115) through a hinge hole (1155), which is located below the tail wheel groove (1153).

7. A composite hemming device according to claim 2, characterized in that, Two auxiliary wheels (13) are symmetrically arranged on the side of the pressure arm (111). The auxiliary wheels (13) are tumblingly connected to the fixed bracket (115). The auxiliary wheels (13) are used to assist in supporting the movement of the pressure arm (111).

8. A composite hemming device according to claim 7, characterized in that, The side wall of the fixed bracket (115) is provided with weight reduction holes (1156), and the weight reduction holes (1156) are arranged vertically.

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