Large-angle rolling head and edge covering and rolling method thereof

Abstract

The invention provides a large-angle rolling head and a covered edge rolling method thereof. The large-angle rolling head comprises a flange connecting base, a pre-pressing mechanism and a rolling head module. The pre-pressing mechanism comprises an elastic part arranged in the flange base and a floating shaft, one end of the floating shaft is inserted into the flange connecting base to be connected with the elastic part and limited, and the other end of the floating shaft is provided with a rolling head module. The floating shaft is sequentially provided with a sliding part, a shaft part and a connecting part in the axial direction, and the sliding part is located in the flange connecting base and connected with the elastic part. The rolling head module comprises a roller pin and a roller rotationally connected to the roller pin. The rolling head modules are distributed in the circumferential direction around a rotating shaft in the vertical direction of the flange connecting base, and an included angle ranging from 60 degrees to 140 degrees is formed between the rolling head modules and the central axis of the flange connecting base. The edge covering device is simple in structure, good in universality, particularly suitable for edge covering machining of large-angle workpieces, convenient to maintain and low in cost.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle body manufacturing, in particular to the technical field of door hemming, and specifically to a large-angle rolling head and an hemming rolling method thereof. Background Art

[0002] In the field of vehicle manufacturing technology, in order to reduce production costs, multiple different models are usually produced on one production line. This requires that the same hemming production line can be used to process multiple different models.

[0003] The commonly used hemming rolling heads currently have the following problems:

[0004] 1) Complex structure and expensive;

[0005] 2) Lack of versatility, difficult to adapt to the hemming requirements of different models;

[0006] 3) It is impossible to take into account multiple angles, especially the hemming of workpieces with large angles exceeding 90°;

[0007] 4) Maintenance is difficult and the maintenance cost is high.

[0008] Therefore, there is an urgent need to provide a new rolling head with good compatibility and adaptable to large-angle folding workpieces and its edge rolling method to solve the above problems and meet the requirements of safety, reliability and convenient operation. Summary of the invention

[0009] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a large-angle rolling head that can adapt to the hemming of workpieces of multiple models and multiple angles, especially to meet the requirements of large-angle hemming exceeding 90°. The present invention also provides a hemming method using the rolling head device to achieve efficient and high-quality hemming operations.

[0010] To achieve the above object, the present invention provides the following technical solutions:

[0011] In a first aspect, the present invention provides a large-angle rolling head, comprising:

[0012] Flange connection base;

[0013] A pre-compression mechanism installed on the flange connection base; and

[0014] One or more rolling head modules connected to the pre-compression mechanism;

[0015] Wherein, the pre-compression mechanism comprises:

[0016] An elastic part, arranged in the flange base;

[0017] A floating shaft has one end inserted into the flange connection base to be connected to and limited by the elastic part, and the other end is provided with one or more rolling head modules; the floating shaft is coaxial with the flange connection base.

[0018] In some optional embodiments of the present invention, the floating shaft comprises a sliding portion, a shaft portion and a connecting portion arranged in sequence along the axial direction; the sliding portion is located in the flange connection base, and one end is connected to the elastic portion; one end of the shaft portion is inserted into the flange connection base, and the other end extends out of the flange connection base; the rolling head module is connected to the connecting portion.

[0019] Preferably, the cross section of the sliding portion is rectangular, and the flange connection base is provided with a hole adapted to the cross section of the sliding portion.

[0020] Further preferably, a sliding block is provided on the outer wall of the sliding portion.

[0021] Still further preferably, a slider adjustment gasket is provided between the outer wall of the sliding portion and the slider.

[0022] Preferably, the cross section of the shaft portion is circular, and the flange connection base is provided with a hole adapted to the cross section of the shaft portion; a sleeve is provided between the inner wall of the flange connection base and the outer wall of the shaft portion.

[0023] Preferably, the sliding portion, the shaft portion and the connecting portion are an integrally formed structure.

[0024] In some optional embodiments of the present invention, the elastic portion includes:

[0025] The spring seat comprises a spring seat body connected to the floating shaft, and a spring seat head slidably connected to the bottom of the flange connection base and axially limited;

[0026] The spring is located in the flange connection base and is sleeved on the spring seat head; two ends of the spring are respectively abutted against the bottom of the flange connection base and the spring seat body.

[0027] In some optional embodiments of the present invention, the flange connection base includes a base body accommodating the elastic part; and a connecting block that limits the axial position of the elastic part and is connected to the base body.

[0028] Preferably, a base adjustment gasket is provided between the connecting block and the base body. The number of the base adjustment gaskets is adjustable and is used to adjust the compression amount of the spring.

[0029] In some optional embodiments of the present invention, a plurality of rolling head modules are circumferentially distributed around the vertical rotation axis of the flange connection base.

[0030] Preferably, the rolling head module and the central axis of the flange connection base form an angle of 60° to 140°.

[0031] In some optional embodiments of the present invention, the rolling head module includes a roller pin, and a roller rotatably connected to the roller pin; the pin is connected to the floating shaft.

[0032] In a second aspect, the present invention provides an edge rolling method, comprising:

[0033] Installing the large-angle rolling head described in the first aspect on a robot;

[0034] According to the hemming angle requirement of the workpiece to be processed, the angle between the rolling head module and the central axis of the flange connection base is adjusted;

[0035] By adjusting the pre-pressure of the elastic part, the hemming pressure is adjusted; and

[0036] The robot is driven to drive the large-angle rolling head to perform hemming processing on the workpiece to be processed.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] The large-angle rolling head of the present invention can realize the panel hemming of multiple models and multiple angles, and achieves strong compatibility through the design combination adjustment of the rolling head module; the structure is flexible and compact, and the cycle time is high; different hemming pressure requirements can be achieved through simple adjustment; 4) easy maintenance and low cost.

[0039] The invention provides a universal large-angle rolling head device capable of realizing hemming of workpieces of various vehicle types and various angles, and is particularly suitable for hemming of large angles exceeding 90 degrees.

[0040] Through the design, combination and adjustment of the rolling head modules, strong compatibility is achieved, reducing the need for multiple dedicated rolling heads and thus reducing equipment costs.

[0041] The invention has the characteristics of flexible and compact structure, being suitable for high-beat operation, and improving production efficiency.

[0042] The adjustable pre-pressing mechanism ensures the consistency of rolling pressure, enhances the hemming quality and reduces the defect rate.

[0043] The hemming method using the rolling head device is integrated with an automated production line to achieve an efficient and reliable hemming process. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions of the embodiments disclosed in the present invention, the drawings of the embodiments will be briefly introduced below. These drawings are only used for illustrative purposes and are not intended to limit the protection scope of the present invention.

[0045] Figure 1 It is a three-dimensional schematic diagram of a large-angle rolling head provided by an embodiment of the present invention;

[0046] Figure 2 is an exploded schematic diagram of a large-angle rolling head provided by an embodiment of the present invention;

[0047] Figure 3 A plan view of a large-angle rolling head provided by an embodiment of the present invention Figure 1 ;

[0048] Figure 4 yes Figure 3 AA cross-sectional view in FIG.

[0049] Figure 5 The screen diagram of a large-angle rolling head provided by an embodiment of the present invention is Figure 2 ;

[0050] Figure 6 yes Figure 5 BB cross-sectional view in FIG.

[0051] Figure 7 It is a three-dimensional schematic diagram of a floating shaft in a large-angle rolling head provided by an embodiment of the present invention;

[0052] Figure 8 It is another large-angle rolling head provided by an embodiment of the present invention;

[0053] Fig. 9 It is another large-angle rolling head provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0054] The technical solution of the present invention (including the preferred technical solution) is further described in detail below by means of the accompanying drawings and by listing some optional 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 making creative work are within the scope of protection of the present invention.

[0055] Example 1

[0056] like Figures 1 to 7 As shown, the large-angle rolling head provided in this embodiment includes a flange connection base 100, a pre-pressing mechanism 200 and three rolling head modules 300; the large-angle rolling head is vertically installed on the robot J6 axis and seamlessly integrated with the automated production line.

[0057] The pre-pressing mechanism 200 includes an elastic portion 202 and a floating shaft 201 .

[0058] The elastic portion 202 is disposed in the flange base 100 and includes:

[0059] A spring seat, which has a spring seat body 2021 connected to the floating shaft 201, and a spring seat head 2022 slidably connected to the bottom of the flange connection base 100 and axially limited;

[0060] The spring 2023 is located in the flange connection base 100 and is sleeved on the spring seat head 2022 , with two ends respectively abutting against the flange connection base bottom 100 and the spring seat body 2021 .

[0061] In some embodiments of the present invention, a floating shaft connection portion 2024 is further provided on the spring seat body 2021, and a hole adapted to the floating shaft connection portion 2024 is provided on the floating shaft 201, and the floating shaft connection portion 2024 is connected to the above hole by threads.

[0062] One end of the floating shaft 201 is inserted into the flange connection base 100 and connected to the elastic part 202 and limited, and the other end is provided with a rolling head module 300. The floating shaft 201 is coaxially arranged with the flange connection base 100, and a sliding part 2011, a shaft part 2012 and a connecting part 2013 are arranged in sequence along the axial direction:

[0063] The sliding part 2011 is located in the flange connection base 100, and one end is connected to the floating shaft connection part 2024 of the elastic part 202;

[0064] One end of the shaft 2012 is inserted into the flange connection base 100, and the other end extends out of the flange connection base 100;

[0065] Three sets of rolling head modules 300 are provided on the connecting portion 2013;

[0066] The rolling head modules 300 are circumferentially distributed around the vertical rotation axis of the flange connection base 100, and each rolling head module 300 forms an angle β with the central axis of the flange connection base 10. The angle β can be adjusted within the range of 60° to 140°, allowing the device to adapt to the hemming angles of different workpieces.

[0067] like Figure 3 , Figure 4 , Figure 6 As shown, the three groups of rolling head modules 300 form different angles with the central axis of the flange connection base, which can realize the hemming of workpieces of multiple vehicle models and multiple angles.

[0068] The sliding portion 2011, the shaft portion 2012 and the connecting portion 2013 are formed in an integrally-molded structure, thereby improving the overall strength and stability.

[0069] The flange connection base 100 includes a base body 101 accommodating an elastic part 202, and a connection block 102 for axially limiting the elastic part 202 and connected to the base body 101. A base adjustment gasket 103 is provided between the base body 101 and the connection block 102, and the compression amount of the spring 2023 can be adjusted by adjusting the number of the base adjustment gaskets 103, thereby realizing precise adjustment of the hemming pressure.

[0070] Regarding the axial limit of the elastic portion 202:

[0071] In some embodiments of the present invention, the connection block 102 is provided with a hole for the spring seat head 2022 to slide. During the movement of the elastic part 202, a part of the spring seat head 2022 is always located in the hole provided in the connection block 102 for the spring seat head 2022 to slide.

[0072] Example 2

[0073] Based on the first embodiment, this embodiment focuses on the specific structural features of the floating shaft 201 .

[0074] The cross section of the sliding part 2011 is rectangular, and the flange connection base 100 is provided with a hole adapted to the cross section of the sliding part 2011. This design can prevent the floating shaft 201 from rotating during operation. A slider 203 is provided on the outer wall of the sliding part 2011, and a slider adjustment gasket 204 is also provided between the outer wall of the sliding part 2011 and the slider 203. By adjusting the slider adjustment gasket 204, the gap between the sliding part 2011 and the flange connection base 100 can be eliminated to ensure smooth movement.

[0075] In some embodiments of the present invention, the slider 203 is an oil-free slider.

[0076] The cross section of the shaft 2012 is circular, and the flange connection base 100 is provided with a hole adapted to the cross section of the shaft 2012. In order to reduce friction and improve movement accuracy, a sleeve 205 is provided between the inner wall of the flange connection base 100 and the outer wall of the shaft 2012. This design enables the floating shaft 201 to smoothly perform axial movement under pressure.

[0077] Example 3

[0078] Based on Example 1, this example focuses on the structural features of the rolling head module.

[0079] like Figure 2 , Figure 4 , Figure 6As shown, the rolling head module 300 includes a roller pin 301 and a roller 302 rotatably connected to the roller pin 301. The roller pin 301 is connected to the connecting portion 2013 of the floating shaft 201. A plurality of rolling head modules 300 are circumferentially distributed around the vertical rotation axis of the flange connection base 100, and an adjustable angle of 60° to 140° is formed between the rolling head module 300 and the central axis of the flange connection base 100.

[0080] The rolling head module 300 specifically includes:

[0081] Roller 301, a component that directly contacts the workpiece;

[0082] Spring washers for shock and noise reduction;

[0083] Bearing 303, supporting roller 302 and ensuring its flexible rotation;

[0084] Circlips fix the bearing position to prevent axial movement;

[0085] The end cap seals the entire module to prevent impurities from entering.

[0086] Example 4

[0087] Compared with Embodiments 1 to 3, the main difference of this embodiment is the number of rolling head modules 300 and the shape of the rollers.

[0088] Compared with the traditional rolling head, the universal large-angle rolling head device of the present invention has significant advantages:

[0089] 1. Versatility: It can adapt to multiple car models and various edge angles, reducing the need for multiple dedicated rolling heads.

[0090] 2. Adjustability: The adjustable pre-tensioning mechanism and configurable rolling head module allow precise control of rolling pressure and roller parameters, enhancing the quality of hemming.

[0091] 3. Efficiency: The compact and modular design supports high-beat operation and improves production efficiency.

[0092] 3. Maintenance: The use of oil-free sliders and modular components simplifies maintenance and reduces downtime.

[0093] 4. Cost savings: By reducing the number of dedicated rolling heads and reducing maintenance costs, the overall cost of the production process is reduced.

[0094] Example 5

[0095] This embodiment provides a hemming rolling method based on the large-angle rolling head, comprising the following steps:

[0096] 1. Install the large-angle rolling head on the robot

[0097] First, check whether all connection parts are tight and ensure that the flange connection base is reliably connected to the robot J6 axis.

[0098] 2. Adjust the angle of the rolling head module

[0099] According to the hemming angle requirements of the workpiece to be processed, the angle between the rolling head module and the central axis of the flange connection base is adjusted. This can be achieved by adjusting the connection angle between the connection part and the roller pin.

[0100] 3. Adjust the rolling pressure

[0101] The pre-compression of the spring can be changed by adjusting the number of the base adjustment pads, thereby adjusting the hemming pressure. The pressure can be determined according to parameters such as the workpiece material and thickness.

[0102] 4. Carry out edge processing

[0103] Start the robot and drive the large-angle rolling head to hem the workpiece along the preset trajectory. During this process, the elastic part can provide stable pressure to ensure the quality of the hem.

[0104] Those skilled in the art will readily appreciate that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, combinations, replacements, improvements, etc. made within the spirit and principles of the present invention are included within the protection scope of the present invention.

Claims

1. A large-angle rolling head, characterized in that: include: Flange connection base; A pre-compression mechanism installed on the flange connection base; as well as One or more rolling head modules connected to the pre-pressing mechanism; Wherein, the pre-compression mechanism comprises: An elastic part, arranged in the flange base; A floating shaft has one end inserted into the flange connection base to be connected to and limited by the elastic part, and the other end is provided with one or more rolling head modules; the floating shaft is coaxial with the flange connection base.

2. The large-angle rolling head according to claim 1, characterized in that: The floating shaft comprises a sliding portion, a shaft portion and a connecting portion arranged in sequence along the axial direction; the sliding portion is located in the flange connection base, and one end is connected to the elastic portion; one end of the shaft portion is inserted into the flange connection base, and the other end extends out of the flange connection base; the rolling head module is connected to the connecting portion.

3. The large-angle rolling head according to claim 2, characterized in that: The cross section of the sliding part is rectangular, and the flange connection base is provided with a hole adapted to the cross section of the sliding part.

4. The large-angle rolling head according to claim 1, characterized in that: The elastic portion comprises: The spring seat comprises a spring seat body connected to the floating shaft, and a spring seat head slidably connected to the bottom of the flange connection base and axially limited; The spring is located in the flange connection base and is sleeved on the spring seat head; two ends of the spring are respectively abutted against the bottom of the flange connection base and the spring seat body.

5. The large-angle rolling head according to claim 1, characterized in that: The flange connection base includes a base body accommodating the elastic part; and a connection block which limits the axial position of the elastic part and is connected to the base body.

6. The large-angle rolling head according to claim 5, characterized in that: A base adjustment gasket is provided between the connecting block and the base body.

7. The large-angle rolling head according to claim 1, characterized in that: A plurality of rolling head modules are distributed circumferentially around the vertical rotation axis of the flange connection base.

8. The large-angle rolling head according to claim 7, characterized in that: The rolling head module and the central axis of the flange connection base form an angle of 60° to 140°.

9. The large-angle rolling head according to claim 1, characterized in that: The rolling head module comprises a roller pin, and a roller rotatably connected to the roller pin; the pin is connected to the floating shaft.

10. A hemming rolling method, comprising: Mounting the large-angle rolling head described in any one of claims 1 to 9 on a robot; According to the hemming angle requirement of the workpiece to be processed, the angle between the rolling head module and the central axis of the flange connection base is adjusted; By adjusting the pre-pressure of the elastic part, the hemming pressure is adjusted; and The robot is driven to drive the large-angle rolling head to perform hemming processing on the workpiece to be processed.

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