A stamping hemming mechanism

Abstract

A stamping hemming mechanism includes an upper die, a lower die, an hemming pulley and an hemming block, the hemming pulley is slidably connected to the lower die in a set direction, the hemming block is slidably connected to the hemming pulley in a vertical direction, and an elastic member is also provided between the hemming block and the hemming pulley for positioning the hemming block relative to the hemming pulley under normal conditions, and the set direction is set at an angle to the vertical direction; the upper die is equipped with a first driving component and a second driving component, the vertical spacing between the first driving component and the hemming pulley is smaller than the vertical spacing between the second driving component and the hemming block, the first driving component is used to drive the hemming pulley to approach the product to be hemmed, and complete the pre-hemming through the hemming block, and the second driving component is used to drive the hemming block to move vertically to complete the final hemming. The stamping hemming mechanism is suitable for the hemming of window sill components with a small space, and can realize the one-time stamping hemming of car doors, which can improve production efficiency, reduce the space occupied in the factory, and save production costs.

Description

Technical Field

[0001] The invention relates to the technical field of door hemming, and in particular to a stamping hemming mechanism. Background Art

[0002] In the design of conventional door hemming molds, it is often the case that the window sill also needs hemming. However, due to the small structural space of the window sill assembly of the door, when the conventional rotary hemming mechanism is used for hemming, both the pre-hemming and the final hemming will interfere with each other, making it impossible to complete the stamping hemming of the door in one go. At this time, it is necessary to add equipment and workstations separately to hem the window sill assembly, but this will undoubtedly reduce production efficiency, occupy too much space in the factory and increase production costs. Summary of the invention

[0003] The purpose of the present invention is to provide a stamping edging mechanism which can be used for edging window sill components in relatively narrow spaces, and can achieve one-time stamping edging of vehicle doors, which is beneficial to improving production efficiency, reducing excessive space occupation in the factory, and saving production costs.

[0004] In order to solve the above technical problems, the present invention provides a stamping hemming mechanism, including an upper mold, a lower mold, an hemming pulley and an hemming pressure block, the hemming pulley is slidably connected to the lower mold in a set direction, the hemming pressure block is slidably connected to the hemming pulley in the vertical direction, and an elastic member is also provided between the hemming pressure block and the hemming pulley for positioning the hemming pressure block relative to the hemming pulley under normal conditions, and the set direction is set at an angle to the vertical; the upper mold is also equipped with a first driving component and a second driving component, the vertical spacing between the first driving component and the hemming pulley is smaller than the vertical spacing between the second driving component and the hemming pressure block, the first driving component is used to drive the hemming pulley to approach the product to be hemmed and complete the pre-hemming through the hemming pressure block, and the second driving component is used to drive the hemming pressure block to perform vertical displacement to complete the final hemming.

[0005] Since the vertical spacing between the first driving component and the hemming pulley is smaller than the vertical spacing between the second driving component and the hemming pressing block, when the mold is closed, the first driving component can first contact the hemming pulley and drive the hemming pulley together with the hemming pressing block to move linearly toward the product to be hemmed. During this process, the hemming pressing block can contact the flange of the product to be hemmed and push the flange to fold, so as to complete the pre-hemming of the product to be hemmed. Afterwards, the second driving component can contact the hemming pressing block and drive the hemming pressing block to move vertically relative to the hemming pulley to vertically press the flange after the pre-hemming, thereby completing the final hemming.

[0006] The pre-edging action and final edging action of the punching edging mechanism provided by the present invention are carried out in two steps. The pre-edging action is the linear displacement of the edging pulley together with the edging pressing block in the set direction. Compared with the rotary edging in the background technology, the above linear displacement can relatively easily enter the narrow window sill assembly, and then cooperate with the force of the second driving component, the edging pressing block can complete the final edging, so that the punching edging can be completed in one time. In this way, there is no need to add equipment and workstations separately, the production efficiency is higher, the space occupied in the factory can be reduced, and the production cost can also be greatly reduced.

[0007] Optionally, a mounting seat is further included, the hemming pressing block is fixed to the mounting seat, and two ends of the elastic member act on the mounting seat and the hemming pulley respectively.

[0008] Optionally, a limiting component is further included, which is installed on one of the mounting seat and the hemming pulley and interacts with the other of the mounting seat and the hemming pulley to limit the vertical distance of the mounting seat relative to the hemming pulley.

[0009] Optionally, the mounting seat is provided with a stepped hole, and along the direction close to the hemming pulley, the stepped hole includes a large diameter hole section and a small diameter hole section, and a step surface is formed between the large diameter hole section and the small diameter hole section; the limiting component includes a rod portion and a head portion with a radial dimension larger than the rod portion, the rod portion passes through the small diameter hole section and is connected to the hemming pulley, the head portion is located in the large diameter hole section, and the radial dimension of the head portion is larger than that of the small diameter hole section.

[0010] Optionally, the elastic member is a spring, the spring is sleeved on the rod, and two ends of the spring are respectively against the hemming pulley and the mounting seat.

[0011] Optionally, the hemming pulley is provided with a mounting groove, the rod portion is connected to a groove bottom wall of the mounting groove, and at least a portion of the elastic member is located in the mounting groove.

[0012] Optionally, at least one of the two surfaces on which the mounting seat and the hemming pulley slide relative to each other is provided with a wear-resistant plate.

[0013] Optionally, the set direction is perpendicular to the vertical direction.

[0014] Optionally, at least one of the two surfaces on which the first driving component and the hemming pulley interact is provided with a guide portion for converting the vertical driving force generated by the first driving component into a driving force for driving the hemming pulley to slide along the set direction; at least the lower end portion of the guide portion of the first driving component is provided with a first inclined portion, and at least the upper end portion of the guide portion of the hemming pulley is provided with a second inclined portion.

[0015] Optionally, the second driving component is a column; and / or, it also includes a return reset component, which acts on the hemming pulley and is used to reset the hemming pulley when the force of the first driving component disappears. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of a specific implementation of the stamping hemming mechanism provided by the present invention;

[0017] Figure 2 It is a schematic diagram of the structure of the hemming pulley, the hemming pressing block and the return reset component.

[0018] Figure 1-Figure 2 The reference numerals in the figures are described as follows:

[0019] 1 upper mold, 11 first driving component, 111 first guide portion, 111a first inclined portion, 12 second driving component;

[0020] 2 lower die;

[0021] 3 hemming pulley, 31 mounting groove, 32 elastic member, 33 wear-resistant plate, 34 second guide portion, 341 second inclined portion;

[0022] 4. Edge pressing block;

[0023] 5 mounting seat, 51 stepped hole;

[0024] 6. Limiting components;

[0025] 7. Return reset component;

[0026] A products to be hemmed, A1 inner panel assembly, A2 outer panel assembly. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0028] The words "first", "second", etc. mentioned in this article are only for the convenience of describing two or more structures or components with the same or similar structures and / or functions, and do not imply any special limitation on the order and / or importance.

[0029] Please refer to Figure 1-Figure 2 , Figure 1 It is a structural schematic diagram of a specific implementation mode of the stamping hemming mechanism provided by the present invention. Figure 2 It is a schematic diagram of the structure of the hemming pulley, the hemming pressing block and the return reset component.

[0030] like Figure 1 , Figure 2 As shown, the present invention provides a stamping hemming mechanism, comprising an upper die 1, a lower die 2, an hemming pulley 3 and an hemming block 4, the hemming pulley 3 is slidably connected to the lower die 2 in a set direction, the hemming block 4 is slidably connected to the hemming pulley 3 in the vertical direction, and an elastic member 32 is also provided between the hemming block 4 and the hemming pulley 3, for positioning the hemming block 4 relative to the hemming pulley 3 under normal conditions, and the set direction is arranged at an angle to the vertical; the upper die 1 is also equipped with a first driving component 11 and a second driving component 12, the vertical spacing between the first driving component 11 and the hemming pulley 3 is smaller than the vertical spacing between the second driving component 12 and the hemming block 4, the first driving component 11 is used to drive the hemming pulley 3 together with the hemming block 4 to approach the product A to be hemmed, and complete the pre-hemming through the hemming block 4, and the second driving component 12 is used to drive the hemming block 4 to perform vertical displacement to complete the final hemming.

[0031] In the initial state, the upper mold 1 and the lower mold 2 can be in a separated state, and the product A to be hemmed can be placed in the lower mold 2. Then, the upper mold 1 can be controlled to move vertically toward the lower mold 2 to close the mold.

[0032] Since the vertical spacing between the first driving component 11 and the hemming pulley 3 is smaller than the vertical spacing between the second driving component 12 and the hemming pressing block 4, during mold closing, the first driving component 11 can first contact the hemming pulley 3 and drive the hemming pulley 3 together with the hemming pressing block 4 to linearly displace toward the product A to be hemmed. During this process, the hemming pressing block 4 can contact the flange (not marked in the figure) of the product A to be hemmed and push the flange to be folded to complete the pre-hemming of the product A to be hemmed. Afterwards, the second driving component 12 can contact the hemming pressing block 4 and drive the hemming pressing block 4 to vertically displace relative to the hemming pulley 3 to vertically press the flange after the pre-hemming to complete the final hemming.

[0033] The pre-edge binding action and the final edge binding action of the punching edge binding mechanism provided by the present invention are carried out in two steps. The pre-edge binding action is the linear displacement of the edge binding pulley 3 together with the edge binding pressing block 4 in the set direction. Compared with the rotary edge binding in the background technology, the above-mentioned linear displacement can relatively easily enter the window sill assembly with a small space. Figure 1 The window sill assembly can generally include an inner panel assembly A1 and an outer panel assembly A2. After the edge pressing block 4 enters the gap between the inner panel assembly A1 and the outer panel assembly A2, the edge pressing block 4 cooperates with the force of the second driving component 12 to complete the final edge wrapping of the outer panel assembly A2, thereby completing the stamping edge wrapping at one time. In this way, there is no need to add equipment and workstations separately, the production efficiency is higher, the space occupied in the factory can be reduced, and the production cost can be greatly reduced.

[0034] It should be noted that although the stamping edging mechanism provided by the present invention is originally designed to perform edging processing on components with relatively narrow space such as window sill assemblies, this does not mean that the stamping edging mechanism can only be used for edging processing on components such as window sill assemblies. It can also be used for edging processing on other components or other parts of the vehicle door.

[0035] In addition, it should be known that the upper mold 1 and the lower mold 2 have other structures in addition to the above-mentioned edging pulley 3, edging pressure block 4, first driving component 11, second driving component 12, etc., but these structures are not closely related to the core invention of the present invention, so they are not described in detail. You can refer to the prior art for specific understanding.

[0036] The aforementioned elastic member 32 can directly act on the edge-wrapping block 4. Alternatively, a mounting seat 5 may also be included, the aforementioned edge-wrapping block 4 may be fixed to the mounting seat 5, and the two ends of the elastic member 32 may act on the mounting seat 5 and the edge-wrapping pulley 3 respectively. At this time, the elastic member 32 may indirectly act on the edge-wrapping block 4 through the mounting seat 5. When the second driving component 12 acts on the edge-wrapping block 4 so that the edge-wrapping block 4 can be displaced vertically downward, the deformation amount of the elastic member 32 may increase to accumulate energy. When the force of the second driving component 12 disappears, the energy accumulated by the elastic member 32 may be released, and then the edge-wrapping block 4 may be driven to return to the installation position under normal conditions (when the second driving component 12 is not acting).

[0037] The deformation of the elastic member 32 may be tensile deformation or compressive deformation, which is specifically related to the installation position of the elastic member 32. In the scheme of the attached drawings, the deformation of the elastic member 32 may be compressive deformation. For different deformation forms, the types of the elastic member 32 may also be different. For example, when the deformation is tensile, the elastic member 32 may be a tension rope, a linear spring, etc., and when the deformation is compressive, the elastic member 32 may be an elastic block, a linear spring, etc.

[0038] Furthermore, a limiting component 6 can be included, which can be installed on one of the mounting seat 5 and the hemming pulley 3, and can interact with the other of the mounting seat 5 and the hemming pulley 3 to limit the vertical distance of the mounting seat 5 relative to the hemming pulley 3, and can construct a limiting connection relationship between the mounting seat 5 and the hemming pulley 3 to avoid the mounting seat 5 from being separated from the hemming pulley 3 in the vertical direction.

[0039] In a specific solution, the mounting seat 5 may be provided with a stepped hole 51, and along the direction close to the hemming pulley 3, the stepped hole 51 may include a large diameter hole section and a small diameter hole section, and a stepped surface may be formed between the large diameter hole section and the small diameter hole section; the limiting component 6 may include a rod and a head with a radial dimension larger than the rod, and in the assembled state, the rod may pass through the small diameter hole section and be connected to the hemming pulley 3, the head may be located in the large diameter hole section, and the radial dimension of the head may be larger than the small diameter hole section. In this way, the head may abut against the stepped surface in the vertical direction to limit the maximum distance of the mounting seat 5 relatively away from the hemming pulley 3 in the vertical direction.

[0040] There are many options for the type of the above-mentioned limiting component 6 including the rod and the head. For example, the limiting component 6 can be a bolt, and its rod can be provided with an external thread, and then can be threadedly connected with the hemming pulley 3, or the rod can also be provided with no external thread. In this case, the rod and the hemming pulley 3 can also be fixed by welding or the like.

[0041] In addition, the above-mentioned limiting structure composed of the limiting component 6 including the rod and the head and the stepped hole 51 can not only limit the vertical displacement of the mounting seat 5, but the cooperation between the rod and the small-diameter hole section can also limit the displacement direction of the mounting seat 5 to guide the vertical sliding of the mounting seat 5 relative to the edging pulley 3.

[0042] It should be pointed out that the above-mentioned limiting component 6 including the rod portion and the head portion is only an exemplary description of the specific structure of the limiting component 6 in an embodiment of the present invention. Under the condition of satisfying the functions, the limiting component 6 may also adopt other structural forms, for example, it may be a limiting block arranged on the hemming pulley 3; in addition, the above-mentioned limiting component 6 including the rod portion and the head portion also integrates a guiding function. In practical applications, the guiding function may also be separated out separately, and then a dedicated guiding component may be arranged. This is also an option that can be adopted.

[0043] For the above-mentioned limiting component 6 including the rod and the head, the elastic member 32 can be a spring, and the spring can be mounted on the rod, and the two ends of the spring can respectively abut against the hemming pulley 3 and the mounting seat 5. In this way, the rod can also play the role of a spring column, which is used to limit the radial movement of the spring, which is conducive to ensuring the stability of the spring during use.

[0044] Furthermore, the hemming pulley 3 may be provided with a mounting groove 31, the rod portion of the limiting component 6 may be connected to the bottom wall of the mounting groove 31, and at least a portion of the elastic member 32 may be located in the mounting groove 31. In this way, the mounting groove 31 forms a hidden structure, and the elastic member 32 disposed in the mounting groove 31 is only partially exposed at most. During use, the elastic member 32 is less likely to be damaged or interfered by the outside world, and the service life and stability can be improved.

[0045] Please continue to refer to Figure 1 At least one of the two surfaces of the mounting seat 5 and the hemming pulley 3 that slide relative to each other can be provided with a wear-resistant plate 33 to increase the wear resistance. The material of the wear-resistant plate 33 is not limited here and can be determined in combination with actual needs.

[0046] During the mold closing process, the upper mold 1 itself needs to be displaced vertically downward. This displacement form is the same as the displacement form required for the final edge wrapping of the edge wrapping block 4. Therefore, the second driving component 12 only needs to use a structural member that can contact the edge wrapping block 4 in the vertical direction and drive the edge wrapping block 4 to move, such as a column, a block, etc.

[0047] For the relative sliding of the hemming pulley 3 and the lower mold 2, the aforementioned setting direction can be a direction perpendicular to the vertical direction. At this time, the hemming pulley 3 is equivalent to sliding in the horizontal plane, or the aforementioned setting direction can also be an angle other than 90 degrees with the vertical direction. At this time, the hemming pulley 3 is equivalent to sliding in an inclined plane (inclined relative to the horizontal plane).

[0048] Since the displacement direction of the upper mold 1 during the mold closing process is not consistent with the sliding direction of the hemming pulley 3, at least one of the two surfaces on which the first driving component 11 and the hemming pulley 3 interact may also be provided with a guide portion, which can convert the downward displacement generated by the upper mold 1 into the displacement of the hemming pulley 3 in a set direction.

[0049] For the convenience of description, the guide portion provided on the first driving component 11 may be referred to as the first guide portion 111 , and the guide portion provided on the hemming pulley 3 may be referred to as the second guide portion 34 .

[0050] Still Figure 1 For the perspective, at least the lower end portion of the first guide portion 111 can be provided with a first inclined portion 111a which is at a non-90 degree angle to the vertical direction, and at least the upper end portion of the second guide portion 34 can be provided with a second inclined portion 341 which is at a non-90 degree angle to the vertical direction. The first inclined portion 111a and the second inclined portion 341 cooperate with each other to convert the vertical driving force generated by the first driving component 11 into a driving force along a set direction, so as to drive the edging pulley 3 to move along the set direction.

[0051] Both guide parts need to withstand sliding friction, so both guide parts can be made of wear-resistant materials with higher hardness to meet the requirements of long-term use.

[0052] As mentioned above, the setting direction may also be at an angle other than 90 degrees to the vertical direction, in which case the sliding of the hemming pulley 3 relative to the lower mold 2 under the action of the first driving component 11 may have a certain slope. If such a slope is a downward slope (while displacing toward the product A to be hemmed, it also moves relatively downward), the friction force when the hemming pulley 3 moves toward the product A to be hemmed can be reduced; if such a slope is an upward slope (while displacing toward the product A to be hemmed, it also moves relatively upward), then, when the action of the first driving component 11 disappears, the gravity of the hemming pulley 3 itself can assist the hemming pulley 3 to slide relative to the lower mold 2 for reset.

[0053] The sliding fit structure between the hemming pulley 3 and the lower die 2 is not limited here, as long as it can meet the use requirements.

[0054] Furthermore, if Figure 2 As shown, a return reset component 7 may also be included, which may act with the hemming block 3 and is used to reset the hemming block 3 when the force of the first driving component 11 disappears. The return reset component 7 may be a component such as a cylinder or an oil cylinder, or may be a spring, an elastic block, a tension rope or other elastic elements in various forms.

[0055] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A stamping hemming mechanism, characterized in that: It comprises an upper die (1), a lower die (2), an edge wrapping pulley (3) and an edge wrapping pressing block (4), wherein the edge wrapping pulley (3) is slidably connected to the lower die (2) in a set direction, and the edge wrapping pressing block (4) is slidably connected to the edge wrapping pulley (3) in a vertical direction. An elastic member (32) is further provided between the edge wrapping pressing block (4) and the edge wrapping pulley (3) for positioning the edge wrapping pressing block (4) relative to the edge wrapping pulley (3) in a normal state, and the set direction is arranged at an angle to the vertical direction. The upper mold (1) is further provided with a first driving component (11) and a second driving component (12); the vertical distance between the first driving component (11) and the hemming pulley (3) is smaller than the vertical distance between the second driving component (12) and the hemming pressing block (4); the first driving component (11) is used to drive the hemming pulley (3) to approach the product (A) to be hemmed and complete the pre-hemming through the hemming pressing block (4); the second driving component (12) is used to drive the hemming pressing block (4) to move vertically to complete the final hemming; It also includes a mounting seat (5), the hemming pressure block (4) is fixed to the mounting seat (5), and the two ends of the elastic member (32) act on the mounting seat (5) and the hemming pulley (3) respectively; it also includes a limiting component (6), the limiting component (6) is installed on one of the mounting seat (5) and the hemming pulley (3), and acts with the other of the mounting seat (5) and the hemming pulley (3) to limit the distance of the mounting seat (5) from the hemming pulley (3) in the vertical direction; at least one of the two surfaces of the mounting seat (5) and the hemming pulley (3) that slide relative to each other is provided with a wear-resistant plate (33).

2. The punching and hemming mechanism according to claim 1, characterized in that: The mounting seat (5) is provided with a stepped hole (51), and along a direction close to the hemming pulley (3), the stepped hole (51) comprises a large-diameter hole section and a small-diameter hole section, and a step surface is formed between the large-diameter hole section and the small-diameter hole section; The limiting component (6) comprises a rod portion and a head portion having a radial dimension greater than that of the rod portion, the rod portion passes through the small-diameter hole section and is connected to the hemming pulley (3), the head portion is located in the large-diameter hole section, and the radial dimension of the head portion is greater than that of the small-diameter hole section.

3. The punching and hemming mechanism according to claim 2, characterized in that: The elastic member (32) is a spring, the spring is sleeved on the rod portion, and two ends of the spring are respectively against the hemming pulley (3) and the mounting seat (5).

4. The punching and hemming mechanism according to claim 3, characterized in that: The hemming pulley (3) is provided with a mounting groove (31), the rod portion is connected to the bottom wall of the mounting groove (31), and at least a portion of the elastic member (32) is located in the mounting groove (31).

5. The punching and hemming mechanism according to any one of claims 1 to 4, characterized in that: The setting direction is perpendicular to the vertical direction.

6. The punching and hemming mechanism according to claim 5, characterized in that: At least one of the two surfaces on which the first driving component (11) and the hemming pulley (3) interact is provided with a guide portion, which is used to convert the vertical driving force generated by the first driving component (11) into a driving force that drives the hemming pulley (3) to slide along the set direction; A first inclined portion (111a) is provided at least at the lower end of the guide portion of the first driving component (11), and a second inclined portion (341) is provided at least at the upper end of the guide portion of the hemming pulley (3).

7. The punching and hemming mechanism according to any one of claims 1 to 4, characterized in that: The second driving component (12) is a cylinder; and / or, It also comprises a return reset component (7) which acts on the edge binding pulley (3) and is used to reset the edge binding pulley (3) when the force of the first driving component (11) disappears.

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