A hemming apparatus and method for a cover flap

Abstract

This invention discloses an edge-wrapping device and method for a wrap-around machine cover. The edge-wrapping device includes a pre-folding device and a dedicated edge-wrapping machine. The pre-folding device includes a mold, a pressing block, and a pre-folding blade. The dedicated edge-wrapping machine includes a mold, a pressing block, a linear drive, a pressing blade mounting base, a pre-wrapping pressing blade, and a final edge-wrapping pressing blade. The edge-wrapping method specifically includes the following steps: pre-folding pressing, pre-folding, pressing by the dedicated edge-wrapping machine, pre-wrapping, and final edge-wrapping. It is used to wrap wrap-around machine covers with side opening angles of 160° or more. The pre-folding blade bends the outer panel's flange from an obtuse angle to 90°, the pre-wrapping pressing blade bends the outer panel's flange from 90° to 45°, and the final edge-wrapping pressing blade presses the outer panel's flange from 45° to 0°. The edge-wrapping equipment and method of the present invention, through the combined application of a pre-folding station and an edge-wrapping machine station, can achieve edge wrapping at ultra-large angles of 160° or more.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of automobile hood edge covering process, in particular to an edge covering equipment and method for a covered hood. BACKGROUND

[0002] In today's society, the models of cars are various and numerous, and the aesthetics of car models also varies from person to person. Among them, the car models with the partial round style using the covered hood are favored and loved by many consumers. The covered hood refers to the hood whose two sides extend to the wing position in the Z-direction (the direction perpendicular to the bottom surface downward), and its characteristic is that the pressing direction of the two sides of the hood is in the Y-direction, not in the traditional Z-direction. This edge covering form brings great challenges to production and manufacturing. The existing three major edge covering technologies are: press, rolling edge, and edge covering special machine. Among them, the press cannot be applied to the covered hood due to its mechanism limitation. Currently, only the rolling edge and the edge covering special machine can be used for the edge covering of the covered hood.

[0003] Both the rolling edge scheme and the edge covering special machine scheme can realize the production of the covered hood from the process perspective. However, the rolling edge scheme cannot adapt to high-speed production (≥60 JPH) due to its slow beat, and thus the edge covering special machine is more suitable for the covered and high-yield high-beat car models. However, when the traditional edge covering special machine is applied to the covered hood, it also faces the following problems:

[0004] 1. How to realize the edge covering of the covered hood with an ultra-large angle of more than 160°; 2. The two sides of the covered hood have steep modeling, and the insufficient pressing force of the traditional scheme will cause the parts to move when they are stressed, and how to realize the effective pressing and positioning of the hood in the mold; 3. The two sides of the covered hood have a large opening angle, and the folding edge ridge line is not clear, and how to realize the effective control of the size of the two sides of the hood; 4. The two sides of the covered hood have steep modeling, which will cause the lower edge covering press (final edge covering press) of the edge covering special machine to interfere with the mold, and what kind of mechanism to use to avoid it.

[0005] The above problems are the major obstacles that restrict the application of the edge covering special machine to the covered hood. Therefore, as of now, there is no case of using the edge covering special machine for edge covering of the covered hood in China. SUMMARY

[0006] In order to overcome the defects of the prior art, the purpose of the present application is to provide an edge covering equipment and method for a covered hood, which can solve the problem of being unable to complete the edge covering in the edge covering special machine at one time for the covered hood with an opening angle of more than 160° on both sides.

[0007] To this end, the application provides a hemming device for a cover type machine cover, comprising a pre-flanging device and a hemming special machine; the pre-flanging device comprises a mould one, a pressing block one, a pre-flanging shovel, a linear drive one and a linear drive two; the linear drive one is connected with the pressing block one and used for pressing the outer plate and the inner plate on the mould one; the linear drive two is connected with the pre-flanging shovel and used for bending the flange of the outer plate from an obtuse angle to 90°.

[0008] The hemming special machine comprises a mould two, a pressing block two, a linear drive three, a pressing knife mounting seat, and a pre-hemming pressing knife and a final hemming pressing knife mounted on the pressing knife mounting seat; the linear drive three is connected with the pressing block two and used for pressing the outer plate and the inner plate on the mould two; the pre-hemming pressing knife 7 has a 135° angle pressing head at the front end, and the final hemming pressing knife 8 has a 90° angle pressing head at the front end; the pre-hemming pressing knife moves downwards with the pressing knife mounting seat to bend the flange of the outer plate from 90° to 45°; the final hemming pressing knife moves downwards with the pressing knife mounting seat to press the flange of the outer plate from 45° to 0°.

[0009] Further, the most front end of the pressing block one has a small boss which is pressed to the R angle root of the outer plate and used for controlling the bending point of the flange of the outer plate.

[0010] Further, an adjusting mechanism for adjusting the front and back positions of the small boss is arranged between the pressing block one and the linear drive one.

[0011] Further, the final hemming pressing knife is arranged at the lower side of the pre-hemming pressing knife, and the working surface of the final hemming pressing knife is arranged in a horizontal direction with the working surface of the pre-hemming pressing knife.

[0012] Further, the linear drive one and the linear drive two are hydraulic cylinders, and the linear drive three is a gas-liquid pressure cylinder.

[0013] Further, the linear drive one, the linear drive two and the linear drive three can adopt a linear motor or a gas cylinder.

[0014] The application further provides a hemming method for a cover type machine cover, comprising the following steps:

[0015] S1: moving the outer plate and the inner plate of the cover type machine cover to the mould one of the pre-flanging device and positioning, and moving the pressing block one driven by the linear drive one to press the outer plate and the inner plate;

[0016] S2: moving the pre-flanging shovel driven by the linear drive two to bend the flange of the outer plate from an obtuse angle to 90°;

[0017] S3: moving the outer plate and the inner plate after pre-flanging to the mould two of the hemming special machine and positioning, and moving the pressing block two driven by the linear drive three to press the outer plate and the inner plate;

[0018] S4: The pressure knife mounting base drives the pre-edge pressing knife to move to the first edge-wrapping position. The pre-edge pressing knife moves from top to bottom, folding the outer panel from 90° to 45°.

[0019] S5: The pressure knife mounting base drives the final edge-wrapping pressure knife to move to the second edge-wrapping position. The final edge-wrapping pressure knife also moves from top to bottom, pressing the outer plate's flange from 45° to 0°, completing the edge-wrapping of the cover.

[0020] The edge-wrapping equipment and method for cover-type machine covers provided by this invention, through the combined application of a pre-folding station and an edge-wrapping machine station, can achieve edge wrapping angles of over 160°; the hydraulically controlled pre-folding clamping scheme, combined with a special pressure block shape, can effectively extend the clamping part to the root of the flange radius, controlling the bending point of the flange, thereby ensuring the outline dimensions of the machine cover after pre-folding; the pneumatic-hydraulic pressurized edge-wrapping machine pressure scheme can effectively clamp the two sides of the steep cover-type machine cover, preventing the outer panel from slipping during 45° and 0° edge wrapping; the staggered arrangement of the pre-wrapping pressure knife and the final edge-wrapping pressure knife ensures the strength of the mold and avoids the problem of interference between the final edge-wrapping pressure knife and the mold during the operation of the pre-wrapping pressure knife caused by traditional installation methods.

[0021] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0023] Figure 1 This is a schematic diagram of the process flow for the edge-wrapping method for a covered machine cover according to the present invention;

[0024] Figure 2 This is a schematic diagram of the pre-folding and pressing process in the edge-wrapping method for a cover-type machine cover according to the present invention;

[0025] Figure 3 This is a schematic diagram of the pre-folding process in the edge-wrapping method for a cover-type machine cover according to the present invention;

[0026] Figure 4 This is a schematic diagram of the edge-sealing machine pressing process in the edge-sealing method for covering machine covers of the present invention;

[0027] Figure 5 This is a schematic diagram of the pre-edge wrapping process one in the edge wrapping method for a cover-type machine cover of the present invention;

[0028] Figure 6This is a schematic diagram of the pre-edge wrapping step two in the edge wrapping method for a cover-type machine cover of the present invention;

[0029] Figure 7 This is a schematic diagram of the structure of the edge-binding method of the present invention, which uses a staggered installation method to install the edge-binding pressure knife;

[0030] Figure 8 This is a schematic diagram of another pre-folding process in the edge-wrapping method for a cover-type machine cover according to the present invention;

[0031] Figure 9 This diagram illustrates the installation of the pressure knife using a traditional mounting method in existing edge-sealing techniques.

[0032] Explanation of reference numerals in the attached figures

[0033] 1. Outer panel; 2. Inner panel; 3. Pressure block one; 4. Pressure block two; 5. Pre-folding edge scraper; 6. Mold one; 7. Pre-edge pressing knife; 8. Final edge pressing knife; 9. Pressing knife mounting base; 10. Linear drive three; 11. Mold two; 12. Linear drive one; 13. Linear drive two; 31. Small boss. Detailed Implementation

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] like Figures 1-8 As shown, the present invention discloses an edge-wrapping device and method for a wrap-around machine cover. The edge-wrapping device includes a pre-folding device and a special edge-wrapping machine. The edge-wrapping method specifically includes the following steps: pre-folding and pressing, pre-folding, pressing with the special edge-wrapping machine, pre-wrapping, and final edge wrapping. It is used to wrap the edges of wrap-around machine covers with an opening angle of 160° or more on both sides.

[0036] Specifically, the pre-folding device includes: mold 6, pressure block 3, pre-folding blade 5, linear drive 12, and linear drive 2; linear drive 12 is connected to pressure block 3 and is used to press the outer plate 1 and inner plate 2 on mold 6, and linear drive 2 is connected to pre-folding blade 5 and is used to bend the flange of the outer plate 1 from an obtuse angle to 90°. Both linear drive 12 and linear drive 2 are hydraulic cylinders.

[0037] The edge-sealing machine includes a mold 2 (11), a pressure block 2 (4), a linear drive 3 (10), a pressure knife mounting base 9, and a pre-edge-sealing pressure knife 7 and a final edge-sealing pressure knife 8 mounted on the pressure knife mounting base 9. The linear drive 3 (10) is connected to the pressure block 2 (4) and is used to press the outer plate 1 and inner plate 2 on the mold 2 (11). The linear drive 3 (10) is a pneumatic-hydraulic booster cylinder.

[0038] Among them, the pre-edge pressing knife 7 has a pressing head with a 135° angle at the front end, and the final edge pressing knife 8 has a pressing head with a 90° angle at the front end; the pre-edge pressing knife 7 moves from top to bottom with the pressing knife mounting base 9, bending the flange of the outer plate 1 from 90° to 45°; the final edge pressing knife 8 moves from top to bottom with the pressing knife mounting base 9, pressing the flange of the outer plate 1 from 45° to 0°.

[0039] like Figure 1 As shown, the opening angles on both sides of the cover reach more than 160°, making it impossible to complete the edge binding in one go in the edge binding machine. This solution divides the edge binding process into two steps: a pre-folding station and a special machine edge binding station. The pre-folding station requires bending the 160° opening angle to 90°, and then transferring the part to the edge binding machine to complete the final edge binding from 90° to 0°.

[0040] like Figure 2 As shown, in the pre-folding device, the outer plate 1 and inner plate 2 of the cover are positioned in the mold 6 by the corresponding positioning mechanism. The pressure block 3 (with R-corner pressure block) is pushed by the linear drive 12 to press the outer plate 1 and inner plate 2. The pressure block 3 is characterized in that the small protrusion 31 at the front end of the pressure block 3 can press to the root of the R-corner of the outer plate. An adjustment mechanism is provided between the pressure block 3 and the linear drive 12. The pressure block 3 can be adjusted back and forth through the adjustment mechanism. The purpose is to control the bending point of the outer plate flange by adjusting the front and rear position of the small protrusion 31, thereby controlling the outline size of the cover after pre-folding.

[0041] In addition, the pressure block 3 is pushed by the linear drive 12, which can generate a clamping force of 10 to 40 KN (adjustable), which can effectively counteract the reaction force generated during pre-folding, thereby ensuring the forming quality of pre-folding.

[0042] like Figure 3 As shown, the outer plate 1 and inner plate 2 of the cover are correctly positioned in the mold 6. After the pressing block 3 is pushed and pressed by the linear drive 12, the pre-folding blade 5 is pushed by the linear drive 13 to move in the left and right direction, folding the edge of the outer plate 1 from an obtuse angle to 90°.

[0043] like Figure 4 As shown, a handling robot typically picks up the outer panel 1 and inner panel 2 of the cover from the pre-folding station and moves them to the edge-sealing machine station. Inside the edge-sealing machine, the outer panel 1 and inner panel 2 of the cover are also positioned within the mold 2 11 by a corresponding positioning mechanism (mold 2 11 is omitted in the figure, but can be seen). Figure 5 ).

[0044] The pressing block 4 is pushed by the linear drive 310 to press the outer plate 1 and the inner plate 2. It can generate a pressing force of 5 to 30 kN (adjustable) and indirectly generate a friction force of 1 to 6 kN, thereby offsetting the lateral force generated during edge binding and preventing the outer plate from shifting during edge binding. The reason for using the linear drive 310 as the power source is that it can save the need for an additional hydraulic station and can generate a pressing force comparable to that of a hydraulic cylinder.

[0045] like Figure 5 As shown, inside the edge-sealing machine, the outer panel 1 and inner panel 2 are correctly positioned within the mold 11, and the pressure block 4, driven by the linear drive 10, effectively presses the outer panel 1 and inner panel 2. Then, the pre-edge-sealing pressure knife 7 moves from top to bottom, folding the outer panel 1 from 90° to 45°, before switching to the final edge-sealing position (e.g., ...). Figure 6 As shown), the final edge-sealing knife 8 also moves from top to bottom, pressing the flange of the outer plate 1 from 45° to 0°, completing the edge-sealing process of the cover.

[0046] Among them, such as Figure 7 As shown, the pre-edge binding knife 7 is positioned forward, and the final edge binding knife 8 is positioned backward, compared to the traditional knife installation method (such as...). Figure 9 As shown), in the staggered installation method, the working positions of the two sets of pressure knives are kept 40-60mm apart in the switching direction, and an intermediate limit (or other mechanism) is added to the switching mechanism of the pressure knives mounting seat 9 so that the pressure knives mounting seat 9 can stop at the working positions of the two sets of staggered pressure knives respectively. This ensures the strength of the mold 2 11 and avoids the problem of interference between the final edge-wrapping pressure knive and the mold 2 when the pre-edge-wrapping pressure knive 7 is working, which is caused by the traditional installation method.

[0047] Thus, with the assurance of the aforementioned mechanisms and methods, the wrap-around cover can be successfully edged and achieve the desired appearance and dimensions.

[0048] In another embodiment, such as Figure 8 As shown, in order to fold the flange of the outer plate 1 from an obtuse angle to 90°, the extension direction of the linear drive 13 can also be the vertical direction. The linear drive 13 pushes the pre-folding blade 5 to move in the vertical direction, folding the flange of the outer plate 1 from an obtuse angle to 90°.

[0049] It should be noted that different structures can be used to achieve the linear movement of the pressing block 3, the pressing block 4, and the pre-folding blade 5. Different power sources, such as motors and cylinders, can be used to replace the hydraulic cylinders and pneumatic-hydraulic booster cylinders described in this solution to achieve the same function.

[0050] The present invention discloses a method for edge-sealing of a cover-type machine cover, comprising the following steps:

[0051] S1: Move the outer and inner plates of the cover onto the mold of the pre-folding device and position them. Drive the pressure block to move by the linear drive to press the outer and inner plates together.

[0052] S2: The linear drive pushes the pre-folding blade to move, folding the outer plate to 90°;

[0053] S3: Move the pre-folded outer plate and the inner plate onto the mold two of the edge-wrapping machine and position them. The linear drive three pushes the pressure block two to move, so as to press the outer plate and the inner plate tightly.

[0054] S4: The pressure knife mounting base drives the pre-edge pressing knife to move to the first edge-wrapping position. The pre-edge pressing knife moves from top to bottom, folding the outer plate from 90° to 45°.

[0055] S5: The pressing knife mounting base drives the final edge pressing knife to move to the second edge-wrapping position. The final edge pressing knife also moves from top to bottom, pressing the outer plate's flange from 45° to 0°.

[0056] In summary, the edge-wrapping equipment and method provided by this invention, through the combined application of a pre-folding station and an edge-wrapping machine station, can achieve edge wrapping angles of over 160°. The hydraulically controlled pre-folding clamping scheme, combined with a special pressure block shape, can effectively extend the clamping part to the root of the flange radius, controlling the bending point of the flange and thus ensuring the outline dimensions of the cover after pre-folding. The pneumatic-hydraulic pressurized edge-wrapping machine pressure scheme can effectively clamp the two sides of the steep, covered cover, preventing the outer panel from slipping during 45° and 0° edge wrapping. The staggered arrangement of the pre-wrapping pressure knife and the final edge-wrapping pressure knife ensures the strength of the mold and avoids the problem of interference between the final edge-wrapping pressure knife and the mold during the operation of the pre-wrapping pressure knife, which is caused by traditional installation methods.

[0057] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A sealing device for a wrap-around machine cover, characterized in that, Used for edge wrapping of cover-type machine covers with opening angles of 160° or more on both sides, including a pre-folding device and a special edge wrapping machine; The pre-folding device includes: mold one (6), pressure block one (3) and pre-folding blade (5); the pressure block one (3) presses the outer plate (1) and inner plate (2) located on the mold one (6) under the action of linear drive one (12); the front end of the pressure block one (3) has a small boss (31); the small boss (31) presses against the root of the R-angle of the outer plate (1) to control the bending point of the outer plate (1); an adjustment mechanism for adjusting the front and rear position of the small boss (31) is provided between the pressure block one (3) and the linear drive one (12); the pre-folding blade (5) is used to bend the edge of the outer plate (1) from an obtuse angle to 90° under the action of linear drive two (13); The edge-wrapping machine includes a mold two (11), a pressure block two (4), a pressure knife mounting base (9), and a pre-edge-wrapping pressure knife (7) and a final edge-wrapping pressure knife (8) mounted on the pressure knife mounting base (9); the pressure block two (4) is used to press the outer plate (1) and the inner plate (2) located on the mold two (11) under the action of the linear drive three (10); The pre-edge pressing knife has a pressing head with a 135° angle at the front end, and the final edge pressing knife has a pressing head with a 90° angle at the front end; the pre-edge pressing knife (7) moves from top to bottom with the pressing knife mounting base (9) and bends the flange of the outer plate (1) from 90° to 45°; the final edge pressing knife (8) moves from top to bottom with the pressing knife mounting base (9) and presses the flange of the outer plate (1) from 45° to 0°; The final edge-sealing knife (8) is located below the pre-edge-sealing knife (7), and the working surface of the final edge-sealing knife (8) is installed in a horizontally offset manner from the working surface of the pre-edge-sealing knife (7).

2. The edge-sealing device for a covered machine cover according to claim 1, characterized in that, The first linear drive (12) and the second linear drive (13) are both hydraulic cylinders, and the third linear drive (10) is a pneumatic-hydraulic booster cylinder.

3. The edge-sealing device for a covered machine cover according to claim 1, characterized in that, The linear drive one (12), the linear drive two (13), and the linear drive three (10) can be linear motors or cylinders.

4. The edge-sealing device for a covered machine cover according to claim 1, characterized in that, The extension of the linear drive (13) is horizontal or vertical so as to push the pre-folded edge scraper (5) to move in the corresponding direction.

5. A method for edge-wrapping a cover-type machine cover, characterized in that, The edge-sealing method, based on the edge-sealing equipment according to any one of claims 1 to 4, is used to edge-seale a cover with opening angles of 160° or more on both sides, and includes the following steps: S1: Move the outer plate (1) and inner plate (2) of the cover to the mold (6) of the pre-folding device and position them. Drive the pressure block (3) to move by the linear drive (12) to press the outer plate (1) and the inner plate (2). S2: The linear drive (13) pushes the pre-folding blade (5) to move, bending the flange of the outer plate (1) from an obtuse angle to 90°; S3: Move the pre-folded outer plate (1) and inner plate (2) onto the mold two (11) of the edge-wrapping machine and position them. The linear drive three (10) pushes the pressure block two (4) to move to press the outer plate (1) and inner plate (2). S4: The pressure knife mounting base (9) drives the pre-edge pressing knife (7) to move to the first edge-wrapping position. The pre-edge pressing knife (7) moves from top to bottom, folding the outer plate (1) from 90° to 45°. S5: The pressure knife mounting base (9) drives the final edge-wrapping pressure knife (8) to move to the second edge-wrapping position. The final edge-wrapping pressure knife (8) also moves from top to bottom, pressing the flange of the outer plate (1) from 45° to 0°, thus completing the edge-wrapping of the cover.

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