In-mold riveting mold

Abstract

The present invention discloses an in-mold riveting mold, which is used for manufacturing a workpiece with a frame shape, including a fixed mold and a movable mold, a mold cavity for accommodating the workpiece is provided between the fixed mold and the movable mold; it also includes an abutment mechanism that is slidably arranged within the mold cavity and cooperates with the inner side of the side wall of the workpiece, and a molding mechanism that is slidably arranged around the side of the mold cavity; it also includes a driving mechanism that can successively drive the abutment mechanism and the molding mechanism to slide during the mold closing process, and the driving mechanism and the corresponding abutment mechanism or molding mechanism are all matched through inclined surface guides. The present invention uses a relatively simple structure and utilizes the movement of the mold closing process itself to realize the action process of riveting and bending after the outer wall of the frame-shaped workpiece is abutted, so as to prevent the deformation or damage of the workpiece due to the non-concentrated force. Not only does it complete all the action processes at one time with less time consumption, so that the production efficiency and precision are greatly improved, but the cost is relatively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of stamping and forming, in particular to an in-mold riveting mold. Background Art

[0002] In-mold riveting dies are a type of process equipment that can directly complete riveting in a stamping die. They belong to the field of stamping forming technology. This type of die can directly install rivets or riveted parts on workpieces through the die, thus eliminating the tedious process of traditional stamping followed by riveting or multiple stampings.

[0003] In the process of in-mold riveting, when the upper and lower molds of the mold are closed, the riveted parts (such as rivets) are accurately sent to the predetermined position on the workpiece under the guidance and positioning of the mold. Then, the mold applies a certain pressure to make the riveted parts plastically deform, thus forming a firm connection with the workpiece.

[0004] Due to its high efficiency and high precision production characteristics, as well as low cost and high flexibility of process, it has been widely used in the manufacturing of parts for automobile, home appliance, aerospace, electronics and other industries. In particular, in the connection process that requires high precision, high efficiency and high reliability, the in-mold riveting mold plays an irreplaceable role.

[0005] However, with the rapid development of science and technology, production processes are becoming more and more innovative. In some industries and industrial fields, such as large equipment, machinery, and automobiles, these products are gradually in short supply due to the substantial increase in market demand. For example, a new energy vehicle manufacturer has a seriously extended delivery cycle due to limited production capacity, which has seriously led to a poor car buying experience for users.

[0006] In this case, it is inevitable to pursue more efficient production capacity. At present, the use of one-piece molding, large-scale parts integrated production and other processes is one of the main concepts to improve production efficiency. This process can quickly produce very complex workpieces, which not only saves a lot of assembly steps and thus greatly shortens the product production cycle, but also reduces a large number of process steps. The reduction in the number of process steps also reduces the production cost, and the probability of assembly problems is reduced due to the reduction in assembly steps, so the final quality of the product is also improved.

[0007] Based on this situation, the current in-mold riveting molds are difficult to cope with the production of some more complex workpieces, especially some frame-shaped workpieces. Since the outer wall of such workpieces needs to be riveted during the mold closing process, and such workpieces themselves may have uneven strength or shear stress distribution, the direct riveting action is likely to cause the workpiece to deform or even be damaged due to the lack of concentrated force. Once such consequences occur, the direct losses and indirect losses caused by the impact on production efficiency are difficult to estimate.

[0008] To this end, the present application proposes an in-mold riveting die that can adapt to the production of more complex frame-shaped structural parts. Summary of the invention

[0009] The purpose of the present invention is to solve the shortcomings of the prior art, and the proposed in-mold riveting mold has a relatively simple structure. It uses the movement of the mold closing process itself to realize the outer wall of the frame-shaped workpiece after being supported and then completes the riveting and bending action process, thereby preventing the workpiece from being deformed or damaged due to the lack of concentrated force. Not only does it complete all the action processes at one time with less time consumption, so that the production efficiency and precision are greatly improved, but the cost is relatively reduced.

[0010] In order to achieve the above object, the present invention provides the following technical solutions: The in-mold riveting mold is used for manufacturing a frame-shaped workpiece, comprising a fixed mold and a movable mold, wherein a mold cavity for accommodating the workpiece is provided between the fixed mold and the movable mold; It also includes an abutment mechanism slidably disposed within the mold cavity and cooperating with the inner side of the side wall of the workpiece, and a molding mechanism slidably disposed around the side of the mold cavity; It also includes a driving mechanism that can drive the abutment mechanism and the molding mechanism to slide in sequence during the mold closing process. The driving mechanism and the corresponding abutment mechanism or molding mechanism are matched through inclined surface guides. The abutment mechanism, molding mechanism and driving mechanism are respectively arranged on the movable mold and the fixed mold.

[0011] Through the above structure, with a relatively simple structure, the movement of the mold closing process itself is utilized to realize the outer wall of the frame-shaped workpiece being supported and then completing the riveting and bending action process, thereby preventing the workpiece from being deformed or damaged due to the non-concentrated force. Not only all the action processes are completed at one time with less time consumption, the production efficiency and precision are greatly improved, and the cost is relatively reduced.

[0012] Preferably, at least one of the fixed mold and the movable mold is equipped with a power unit to achieve mold closing action.

[0013] Through the above structure, a power source is provided for the clamping process of the fixed mold and the movable mold to support the riveting and bending actions.

[0014] Preferably, the abutment mechanism comprises at least two symmetrically arranged first mold walls.

[0015] Through the above structure, on the basis of ensuring that the abutting force on the workpiece is relatively balanced when the mold is closed, it can meet the application of frame-shaped workpieces of various shapes and structures, and can ensure more qualified riveting and bending quality.

[0016] Preferably, it also includes a second mold wall located between the first mold walls and cooperating with the inner side of the side wall of the workpiece, and the second mold wall includes at least one and is set in a fixed position.

[0017] Through the above structure, workers can place the workpieces better when loading materials, thereby ensuring that no errors are made when performing abutment and forming actions, thereby greatly reducing the probability of damage to the workpieces and ensuring production progress.

[0018] Preferably, the abutment mechanism further comprises a third mold wall located at a symmetrical position of the second mold wall, and the third mold wall is slidably arranged to move closer to or farther from the second mold wall.

[0019] Through the above structure, when the entire abutting action process is completed, the workpiece is subjected to balanced forces in all directions and is accurately positioned, so as to ensure that the riveting and bending actions are accurately performed.

[0020] Preferably, the abutment mechanism and the second mold wall are both arranged on the fixed mold, the fixed mold is located below the movable mold, and each of the driving mechanisms corresponds to a molding mechanism and an abutment mechanism.

[0021] Through the above structure, the technical solution is easy to load and operate, and is more in line with the concept of modular design, so that it is easy to adjust and replace when replacing workpieces of different specifications.

[0022] Preferably, the forming mechanism comprises at least two symmetrically arranged wall pressing units.

[0023] Through the above structure, the workpiece can always complete the bending and / or riveting action under a state of force balance, further improving the processing quality of the workpiece.

[0024] Preferably, the wall pressing unit includes first pressure walls located at both ends of each first mold wall and a second pressure wall located at a portion of the first mold wall away from the mold cavity.

[0025] Through the above structure, when the forming action is performed, the first pressing wall and the second pressing wall move toward the mold cavity range, completing the riveting and / or bending action of the workpiece from multiple angles, with high work efficiency and balanced acceptance, and can ensure production quality.

[0026] Preferably, the first pressure wall is located on the fixed mold, and the second pressure wall is located on the movable mold.

[0027] The above structure makes the space utilization rate of the mold higher, reduces the space occupied, and is more convenient for loading and unloading operations.

[0028] Preferably, a mating wall which can cooperate with the raised part on the surface of the workpiece is also provided in the mold cavity, and the mating wall includes an outer mating wall and an inner mating wall. The outer mating wall is respectively provided on the surfaces of the first mold wall, the second mold wall and the third mold wall facing the center of the workpiece, and the inner mating wall is provided on the movable mold at a position corresponding to the outer mating wall.

[0029] Through the above structure, the mold can also complete the stamping function through the mold closing action, which improves the application range of the mold, and the production quality can be guaranteed whether it is bending, riveting or stamping.

[0030] Preferably, the first mold wall, the third mold wall, the first pressure wall and the second pressure wall all include a slide rail, a slider sliding on the slide rail and a reset component that can drive the slider to return to an initial position, and the driving mechanism all includes a fixed column and a top block arranged on the head of the fixed column, and the slider and the top block are both trapezoidal table-shaped.

[0031] Through the above structure, after demoulding, the actuator and the molding mechanism can return to the initial position, which is convenient for continuing the integrated molding production of the workpiece.

[0032] Preferably, during the mold closing process, the first mold wall and the third mold wall contact the corresponding driving mechanism in sequence, and when the next mold wall starts to contact the corresponding driving mechanism, the previous mold wall has completed the sliding stroke.

[0033] The above structure ensures that the abutting mechanism will not cause damage to the workpiece during the process of abutting against the inner side of the outer wall of the workpiece, thereby ensuring production quality.

[0034] Preferably, it further comprises a positioning mechanism, including a positioning column and a positioning cylinder which are respectively arranged on the fixed mold and the movable mold and cooperate with each other, and the positioning mechanism is the first to come into contact during the mold closing process.

[0035] The above structure ensures that each process in the mold closing process can be carried out stably.

[0036] In order to achieve the above object, the present invention also provides the following technical solutions: The in-mold riveting method comprises the following steps: Putting the workpiece into the mold cavity in the initial state, with the outer frame of the workpiece completely covering all the abutment mechanisms; The movable mold and the fixed mold are close to each other, the abutment mechanism is in contact with the corresponding driving mechanism, and the inner side of the outer frame of the workpiece and the outer wall of the abutment mechanism enter and maintain a pressure contact state; The movable die and the fixed die continue to approach each other, the forming mechanism contacts the corresponding driving mechanism, and the outer side of the outer frame of the workpiece is squeezed by the forming mechanism to complete the bending action; Complete the riveting action on the workpiece; The movable mold and the fixed mold are separated from each other; Remove the workpiece.

[0037] Through the above method, the movement of the mold closing process itself can be utilized to realize the outer wall of the frame-shaped workpiece being supported and then completing the riveting and bending action process, thereby preventing the workpiece from being deformed or damaged due to uneven force. Not only can all the action processes be completed at one time with less time consumption, the production efficiency and precision are greatly improved, and the cost is relatively reduced.

[0038] Compared with the prior art, the present invention has the following beneficial effects: with a relatively simple structure, the movement of the mold closing process itself is utilized to realize the outer wall of the frame-shaped workpiece being supported and then completing the riveting and bending action process, thereby preventing the workpiece from being deformed or damaged due to the non-concentrated force. Not only all the action processes are completed at one time with less time consumption, the production efficiency and precision are greatly improved, and the cost is relatively reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is an example diagram of a frame-shaped workpiece; Figure 2 It is a schematic diagram of the general assembly structure of the in-mold riveting mold proposed by the present invention when the mold is closed; Figure 3 This is a schematic diagram of the explosion structure of the in-mold riveting mold proposed by the present invention when the mold is separated; Figure 4 It is a schematic diagram of the three-dimensional structure of the fixed die in the in-mold riveting die proposed by the present invention, mainly showing the position distribution of the abutment mechanism, the forming mechanism and the driving mechanism on the fixed die; Figure 5 It is a schematic diagram of the three-dimensional structure of the movable mold in the in-mold riveting mold proposed by the present invention, mainly showing the position distribution of the forming mechanism and the driving mechanism on the movable mold; Figure 6 It is a schematic diagram of the three-dimensional structure of the first pressing wall in the in-mold riveting mold proposed by the present invention.

[0040] In the figure: A, workpiece; A1, outer frame; A2, protrusion; 1. Fixed mold; 2. Moving mold; 3. Mold cavity; 4. Abutment mechanism: 41. first mold wall; 42. second mold wall; 43. third mold wall; 4a. slide rail; 4b. slide block; 5. Forming mechanism; 51. Wall pressing unit; 511. First wall pressing; 512. Second wall pressing; 6. driving mechanism; 61. fixing column; 62. top block; 7. Matching wall; 71. Outer matching wall; 72. Inner matching wall; 8. Positioning mechanism; 81. Positioning column; 82. Positioning cylinder. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the 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 creative work are within the scope of protection of the present invention.

[0042] The frame-shaped workpiece A exemplified in the present technical solution can be Figure 1 As shown, it at least includes an outer frame A1 located at the outermost side, and may also have a convex shape A2 on the main body surface. Of course, the illustration is only exemplary. In fact, the frame-shaped workpiece A may be square, circular or polygonal. The frame-shaped workpiece A can be the front door structure of a drum washing machine. Although it is a door panel structure, there are side frames on its surrounding edges that are different from the direction of the panel surface, so it should also be regarded as a workpiece A with a frame shape. Of course, any workpiece A with a frame structure can be regarded as the scope of application of this technical solution.

[0043] Embodiment 1: See also Figure 1-3 , the present invention provides the following technical solutions: an in-mold riveting mold, used for manufacturing a frame-shaped workpiece A, comprises a fixed mold 1 and a movable mold 2, and a mold cavity 3 for accommodating the workpiece A is provided between the fixed mold 1 and the movable mold 2; It also includes an abutment mechanism 4 slidably disposed within the mold cavity 3 and cooperating with the inner side of the side wall of the workpiece A, and a molding mechanism 5 slidably disposed around the side of the mold cavity 3; It also includes a driving mechanism 6 which can drive the abutment mechanism 4 and the molding mechanism 5 to slide successively during the mold closing process. The driving mechanism 6 and the corresponding abutment mechanism 4 or the molding mechanism 5 are matched through inclined guides. The abutment mechanism 4, the molding mechanism 5 and the driving mechanism 6 are respectively arranged on the movable mold 2 and the fixed mold 1.

[0044] As an optional embodiment of the present invention, the worker first places the workpiece A to be riveted into the mold cavity 3. Since each abutting mechanism 4 is in an initial state at this time, there is enough space (or gap) to allow the workpiece A to be placed in the mold cavity 3 and completely cover all the abutting mechanisms 4. When the movable mold 2 is molded with the fixed mold 1, the driving mechanism 6 first contacts the abutting mechanism 4. Relying on the inclined guide cooperation between the driving mechanism 6 and the abutting mechanism 4, the abutting mechanism 4 is driven to move outside the range of the mold cavity 3 during the continuous mold closing process, thereby abutting against the inner surface of the outer wall of the frame-shaped workpiece A. This prevents the force from being unable to be concentrated during the subsequent riveting process and bending process, so that the riveting and bending can be better carried out to achieve the required production quality; After the abutting mechanism 4 completely abuts against the inner side of the outer wall of the frame-shaped workpiece A, the mold closing process continues, and the forming mechanism 5 is now in contact with the corresponding driving mechanism 6, and the forming mechanism 5 also relies on the inclined surface guide to perform the bending and riveting process.

[0045] In the present technical solution, it should be understood that the forming mechanism 5 is a plurality of actuators for performing riveting and bending actions, which can be a live tool for directly performing riveting and bending actions, or a structure that is driven by the driving mechanism 6 to complete the riveting and bending actions. The present technical solution aims to realize the riveting and bending functions of the workpiece A through the mold closing process itself, and the specific method of the forming mechanism 5 is not specifically limited. On the basis of the present technical solution, those skilled in the art can further improve the efficiency of the above functions by changing the specific method of the forming mechanism 5, which should fall within the protection scope of the present technical solution; The driving mechanism 6 should be considered to rely solely on the force during the mold closing action, and to move the molding mechanism 5 or the abutment mechanism 4 toward the outside of the mold cavity 3 through the inclined guide cooperation. Therefore, any specific structure with inclined guide cooperation can be regarded as within the protection range of the driving mechanism 6.

[0046] The inclined guide fit can be understood as the trapezoidal method described later, or other methods in the prior art. As long as the driving mechanism 6 contacts the abutting mechanism 4 or the molding mechanism 5 in the moving direction during mold closing, the abutting mechanism 4 or the molding mechanism 5 can be moved in the radial direction of the mold cavity 3. This design method does not require too high precision during fit, and only needs to pay attention to the action sequence, but the final positioning of the workpiece A and the molding process are very accurate.

[0047] Through the above structure, with a relatively simple structure, the movement of the mold closing process itself is utilized to realize the outer wall of the frame-shaped workpiece A being supported and then the riveting and bending action process is completed, so as to prevent the workpiece A from being deformed or damaged due to the non-concentrated force. Not only all the action processes are completed at one time with less time consumption, the production efficiency and precision are greatly improved, and the cost is relatively reduced.

[0048] like Figure 2As shown, at least one of the fixed mold 1 and the movable mold 2 is equipped with a power unit to achieve mold closing action.

[0049] As an optional implementation scheme of the present invention, generally speaking, the fixed mold 1 is designed for a fixed position, and the movable mold 2 is designed for a movable position, but in some cases it is also possible that both molds are moving, and the "fixed" and "moving" in this technical scheme are only for explaining the two molds separately, and such a situation also exists in the prior art, so it cannot be regarded as a limitation on the application of this technical scheme.

[0050] The power unit refers to the part that provides the power source for mold closing, which can be hydraulic, electric, pneumatic or other forms. The present technical solution also does not limit it. As long as it can drive the fixed mold 1 and / or the movable mold 2 to move after startup to support the mold closing function, it can be regarded as within the protection scope of the power unit.

[0051] Through the above structure, a power source is provided for the clamping process of the fixed mold 1 and the movable mold 2 to support the riveting and bending actions.

[0052] like Figure 3-4 As shown, the abutment mechanism 4 includes at least two symmetrically arranged first mold walls 41 .

[0053] As an optional embodiment of the present invention, it should be understood that the first mold wall 41 should also match the inner side of the outer wall of the frame-shaped workpiece A because the abutment mechanism 4 matches the inner side of the outer wall of the frame-shaped workpiece A. In addition, since it is mentioned above that the frame-shaped workpiece A should not be limited to a certain shape, different first mold walls 41 may also have different shapes.

[0054] At least two symmetrically distributed first mold walls 41 can, firstly, provide a more balanced supporting force when abutting against the inner side of the outer wall of the workpiece A, thereby avoiding displacement during the subsequent riveting or bending process and affecting the production quality of the workpiece A. Secondly, the two first mold walls 41 are sufficient to be applicable to most frame-shaped parts. As long as the first mold wall 41 can abut against the part to be riveted or bent, it is sufficient to be used even if the first mold wall 41 has a complex shape or a large volume. Of course, multiple groups of first mold walls 41 can be used to achieve the abutment function.

[0055] Among them, the abutment mechanism 4 can be identified as a whole, which is directly driven by the driving mechanism 6 to complete the abutment action, or it can be identified as a modular component, which is composed of multiple standardized components (such as the slide rail 4a, slider 4b and reset component described later) as the basis, and then equipped with detachable non-standard components that can cooperate with the inner side of the outer wall of the frame-shaped workpiece A. Therefore, the present technical solution does not limit the specific implementation method of the first mold wall 41.

[0056] Through the above structure, on the basis of ensuring that the abutting force on the workpiece A is relatively balanced during mold closing, it can meet the application of frame-shaped workpieces A of various shapes and structures, and can ensure more qualified riveting and bending quality.

[0057] like Figure 3-4 As shown, it also includes a second mold wall 42 located between the first mold walls 41 and matched with the inner side of the side wall of the workpiece A. The second mold wall 42 includes at least one and is set in a fixed position.

[0058] As an optional embodiment of the present invention, as mentioned above, although relying only on two or more groups of first mold walls 41 is sufficient to meet the abutment design required by most frame-shaped workpieces A, considering the positioning required during loading and the actual shape of the workpiece A, there may be a problem of inaccurate positioning when the frame-shaped workpiece A is only abutted in one or fewer directions, such as a square or polygonal frame-shaped workpiece A, and when bending or riveting in multiple directions is required, there is a problem of inaccurate positioning.

[0059] It is worth noting that the second mold wall 42 is limited to at least one, and all are fixed position designs. For the second mold wall 42 with fixed position design, it does not need to move, so one less driving mechanism 6 is used, so the cost is saved; more importantly, if all the first mold walls 41 or the second mold walls 42 are movable, then when they are in the initial position, there is a larger loading space (installation gap, that is, the spacing between the abutment mechanism 4 and the forming mechanism 5 in the same direction), then after each loading, it is possible that the position is too biased, and it may be difficult to complete accurate positioning when the abutment mechanism 4 performs the abutment action. For example, each abutment mechanism 4 is aligned with the corner position of the frame-shaped workpiece A, or the riveting or bending position fails to align with the forming mechanism 5, which will eventually lead to processing failure. As mentioned above, the cost of such a large workpiece A is relatively high, so inaccurate positioning will cause damage to the workpiece A, which is very costly and greatly delays the production progress.

[0060] Among them, for the second mold wall 42, it can be the same as the first mold wall 41, and is not limited to a specific construction method (without the slide rail 4a), but only provides abutment actions in more directions and a better positioning effect.

[0061] Through the above structure, workers can place the workpiece A better when loading materials, thereby ensuring that there will be no errors when performing abutment and forming actions, thereby greatly reducing the probability of damage to the workpiece A and ensuring production progress.

[0062] like Figure 4 As shown, the abutment mechanism 4 further includes a third mold wall 43 located at a symmetrical position of the second mold wall 42 , and the third mold wall 43 is slidably arranged to move closer to or farther from the second mold wall 42 .

[0063] As an optional implementation scheme of the present invention, after the first mold wall 41 is driven by the driving mechanism 6 to complete the abutment action on the inner side of the outer wall of the frame-shaped workpiece A in one direction, since the second mold wall 42 is designed for a fixed position, that is, when the movable third mold wall 43 contacts the workpiece A, it will continue to move, and eventually multiple directions of the workpiece A will be abutted, thereby being positioned and maintained at a position where it can be riveted or bent by the forming mechanism 5.

[0064] Of course, the second mold wall 42 and the third mold wall 43 are symmetrically distributed, which can also ensure that the force balance of the workpiece A is maintained during the subsequent forming operation.

[0065] It is worth noting that the whole set of abutting actions at this time can be regarded as: the two first mold walls 41 first abut the two sides of the frame-shaped workpiece A, and then the third mold wall 43 pulls the workpiece A from the inside of the workpiece A until the entire workpiece A is accurately positioned. The execution order of the first mold wall 41 and the third mold wall 43 can also be simultaneous, or the third mold wall 43 can complete the abutment first, which is not limited in the present technical solution.

[0066] Through the above structure, when the entire abutting action process is completed, the workpiece A is subjected to balanced forces in all directions and is accurately positioned, so as to ensure that the riveting and bending actions are accurately performed.

[0067] like Figure 3-5 As shown, the abutting mechanism 4 and the second mold wall 42 are both arranged on the fixed mold 1 , the fixed mold 1 is located below the movable mold 2 , and each driving mechanism 6 corresponds to a molding mechanism 5 and abutting mechanism 4 .

[0068] As an optional implementation scheme of the present invention, in the current mold forming field, there are vertical or oblique layout clamping methods, so this is not restrictive in the aforementioned implementation scheme.

[0069] Since the technical solution is mainly to solve the molding problem of large and complex workpieces A, when designing and selecting the material loading, it is preferred that the fixed mold 1 is located below the movable mold 2, which is more suitable for the material loading operation.

[0070] In addition, in fact, the forming mechanism 5 and the abutting mechanism 4 can be performed by only one or a small number of driving mechanisms 6, but this will make the structure of the driving mechanism 6 more complicated, and it is also inconvenient to adjust when replacing workpieces A of different specifications. Therefore, the method of having one driving mechanism 6 drive one forming mechanism 5 or one abutting mechanism 4 is more conducive to the modular design concept, which enables each forming mechanism 5, abutting mechanism 4, and driving mechanism 6 to be mass-produced, and is convenient to disassemble, replace, or adjust the position when replacing the workpiece A.

[0071] Through the above structure, the technical solution is easy to load and operate, and is more in line with the concept of modular design, so that it is easy to adjust and replace when replacing workpieces A of different specifications.

[0072] like Figure 5 As shown, the forming mechanism 5 includes at least two symmetrically arranged wall pressing units 51 .

[0073] As an optional implementation scheme of the present invention, the wall pressing unit 51, as the name implies, refers to a component that performs pressure contact from the outside of the outer wall of the workpiece A. In the present technical solution, the wall pressing unit 51 can be a component that only provides pressure contact to assist in the completion of bending and riveting actions, or it can be a component that directly performs bending and riveting actions. The present technical solution does not limit this.

[0074] It should be understood that at least two symmetrical wall pressing units 51 can enable such a frame-shaped workpiece A to be directly bent or riveted at both ends, or to provide support force at one end to assist the other end in performing forming actions. During the entire forming process, the workpiece A always maintains force balance, thereby ensuring the processing quality of the workpiece A.

[0075] Through the above structure, the workpiece A can always complete the bending and / or riveting actions under a state of force balance, further improving the processing quality of the workpiece A.

[0076] like Figure 5 As shown, the wall pressing unit 51 includes a first pressing wall 511 located at both ends of each first mold wall 41 and a second pressing wall 512 located at a range of the first mold wall 41 away from the mold cavity 3 .

[0077] As an optional embodiment of the present invention, as the two first mold walls 41 mentioned above, since the two first mold walls 41 move toward the outside of the mold cavity 3 when performing the abutment action, and due to the position of the third mold wall 43, in order to ensure both the force balance and the spatial layout, it is more appropriate to arrange the second pressure wall 512 at both ends of the first mold wall 41.

[0078] Through the above structure, when the forming action is performed, the first pressing wall 511 and the second pressing wall 512 move toward the mold cavity 3 to complete the riveting and / or bending action on the workpiece A from multiple angles, with high work efficiency and balanced acceptance, which can ensure production quality.

[0079] like Figure 4-5 As shown, the first pressing wall 511 is located on the fixed mold 1 , and the second pressing wall 512 is located on the movable mold 2 .

[0080] As an optional implementation scheme of the present invention, considering the spatial position layout, the first pressure wall 511 and the second pressure wall 512 are respectively distributed on the fixed mold 1 and the movable mold 2 to make the space utilization rate higher, thereby reducing the space occupation.

[0081] The above structure makes the space utilization rate of the mold higher, reduces the space occupied, and is more convenient for loading and unloading operations.

[0082] like Figure 4-5 As shown, a mating wall 7 which can cooperate with the raised portion A2 on the surface of the workpiece A is further provided in the mold cavity 3. The mating wall 7 includes an outer mating wall 717 and an inner mating wall 727. The outer mating wall 717 is respectively provided on the surfaces of the first mold wall 41, the second mold wall 42, and the third mold wall 43 facing the center of the workpiece A, and the inner mating wall 727 is provided on the movable mold 2 and at a position corresponding to the outer mating wall 717.

[0083] As an optional embodiment of the present invention, for some more complex frame-shaped workpieces A, there are also special-shaped structures on their surfaces, such as Figure 1 The front sealing door of the drum washing machine shown. During the mold closing process, the first mold wall 41 and the second mold wall 42 are close to each other, so that the positioned workpiece A can be punched, so that the workpiece A can complete more functions, which greatly improves the production efficiency of integrated molding, and even in the case of workpiece A that does not require punching, such a structure can further ensure that both sides of the frame-shaped workpiece A can be supported, thereby avoiding deformation of the side wall of the workpiece A during riveting and / or bending.

[0084] It is worth noting that, relying on the aforementioned abutment mechanism 4 and forming mechanism 5, the outer wall of the workpiece A has been accurately positioned, and both the inner and outer sides of the outer wall are supported, so the quality of stamping can also be guaranteed.

[0085] Through the above structure, the mold can also complete the stamping function through the mold closing action, which improves the application range of the mold, and the production quality can be guaranteed whether it is bending, riveting or stamping.

[0086] like Figure 4-6 As shown, the first mold wall 41, the third mold wall 43, the first pressure wall 511 and the second pressure wall 512 all include a slide rail 4a, a slider 4b sliding on the slide rail 4a and a reset component that can drive the slider 4b to return to the initial position, and the driving mechanism 6 includes a fixed column 61 and a top block 62 arranged on the head of the fixed column 61, and the slider 4b and the top block 62 are both trapezoidal.

[0087] As an optional implementation scheme of the present invention, the reset component (not shown, located inside, acting on the slider) should be understood to be able to drive the actuator and the molding mechanism 5 back to the initial position during demolding so as not to affect the subsequent loading of the workpiece A, and the reset component can be electric, hydraulic or other active power, or can directly use an elastic component to achieve reset, such as a spring.

[0088] Through the above structure, after demoulding, the actuator and the molding mechanism 5 can return to the initial position, which is convenient for continuing the integrated molding production of the workpiece A.

[0089] like Figure 3-5 As shown, during the mold closing process, the first mold wall 41 and the third mold wall 43 contact the corresponding driving mechanism 6 in sequence, and when the next mold wall starts to contact the corresponding driving mechanism 6, the previous mold wall has completed the sliding stroke.

[0090] As an optional implementation scheme of the present invention, since the third mold wall 43 is only located on the opposite side of the second mold wall 42 and in the middle of the two first mold walls 41, and the stroke direction of the first mold wall 41 is not necessarily perpendicular to the stroke direction of the third mold wall 43, if the third mold wall 43 moves first, then when the first mold wall 41 moves, it may be impossible to form a stable guiding effect due to the insufficient contact area between the third mold wall 43 and the inner side of the outer wall of the workpiece A, causing the inner side of the outer wall of the workpiece A to be worn due to the inconsistency between the force direction and the movement direction, and even deformation and damage.

[0091] The above structure ensures that the abutting mechanism 4 will not cause damage to the workpiece A during the process of abutting against the inner side of the outer wall of the workpiece A, thereby ensuring production quality.

[0092] like Figure 3-5 As shown, it also includes a positioning mechanism 8, including a positioning column 81 and a positioning cylinder 82 which are respectively arranged on the fixed mold 1 and the movable mold 2 and cooperate with each other. The positioning mechanism 8 is the first to make contact or always maintain contact during the mold closing process.

[0093] As an optional embodiment of the present invention, the positioning column 81 and the positioning cylinder 82 are common structures that provide stable guidance for mold closing, which enables each molding mechanism 5 and the abutment mechanism 4 to smoothly complete the entire production process during the mold closing process.

[0094] The above structure ensures that each process in the mold closing process can be carried out stably.

[0095] Embodiment 2: In order to achieve the above object, the present invention also provides the following technical solutions: S1: In-mold riveting method, including the following steps: S2: placing the workpiece A into the mold cavity 3 in the initial state, and the outer frame of the workpiece A completely covers all the abutment mechanisms 4; S3: The movable mold 2 and the fixed mold 1 approach each other, the abutting mechanism 4 contacts the corresponding driving mechanism 6, and the inner side of the outer frame of the workpiece A and the outer wall of the abutting mechanism 4 enter and maintain a pressure contact state; S4: The movable die 2 and the fixed die 1 continue to approach each other, the forming mechanism 5 contacts the corresponding driving mechanism 6, and the outer side of the outer frame of the workpiece A is squeezed by the forming mechanism 5, completing the bending action; S5: complete the riveting action on workpiece A; S6: The movable mold 2 and the fixed mold 1 are separated from each other; S7: Take out workpiece A.

[0096] Through the above method, the movement of the mold closing process itself can be utilized to realize the outer wall of the frame-shaped workpiece A being supported and then completing the riveting and bending action process, thereby preventing the workpiece A from being deformed or damaged due to the unconcentrated force. Not only can all the action processes be completed at one time with less time consumption, the production efficiency and accuracy are greatly improved, and the cost is relatively reduced.

[0097] The working principle and use process of the present invention are as follows: the worker first places the workpiece A to be riveted into the mold cavity 3. Since each abutting mechanism 4 is in the initial state at this time, there is enough space (or gap) to allow the workpiece A to be placed in the mold cavity 3 and completely cover all the abutting mechanisms 4; When the movable mold 2 is molded with the fixed mold 1, the driving mechanism 6 first contacts the abutting mechanism 4. Relying on the inclined guide cooperation between the driving mechanism 6 and the abutting mechanism 4, the abutting mechanism 4 is driven to move outside the range of the mold cavity 3 during the continuous mold closing process, thereby abutting against the inner surface of the outer wall of the frame-shaped workpiece A. This prevents the force from being unable to be concentrated during the subsequent riveting process and bending process, so that the riveting and bending can be better carried out to achieve the required production quality; After the abutting mechanism 4 completely abuts against the inner side of the outer wall of the frame-shaped workpiece A, the mold closing process continues, and the forming mechanism 5 is now in contact with the corresponding driving mechanism 6, and the forming mechanism 5 also relies on the inclined surface guide to perform the bending and riveting process.

[0098] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An in-mold riveting mold, used for manufacturing a frame-shaped workpiece, comprises a fixed mold and a movable mold, wherein a mold cavity for accommodating the workpiece is provided between the fixed mold and the movable mold, and is characterized in that: It also includes an abutment mechanism slidably disposed within the mold cavity and cooperating with the inner side of the side wall of the workpiece, and a molding mechanism slidably disposed around the side of the mold cavity; It also includes a driving mechanism that can drive the abutment mechanism and the molding mechanism to slide in sequence during the mold closing process. The driving mechanism and the corresponding abutment mechanism or molding mechanism are matched through inclined surface guides. The abutment mechanism, molding mechanism and driving mechanism are respectively arranged on the movable mold and the fixed mold.

2. The in-mold riveting mold according to claim 1, characterized in that: The abutment mechanism comprises at least two symmetrically arranged first mold walls.

3. The in-mold riveting mold according to claim 2, characterized in that: It also includes a second mold wall located between the first mold walls and matched with the inner side of the side wall of the workpiece, and the second mold wall includes at least one and is set in a fixed position.

4. The in-mold riveting mold according to claim 3, characterized in that: The abutment mechanism further comprises a third mold wall located at a symmetrical position of the second mold wall, and the third mold wall is slidably arranged to move closer to or farther from the second mold wall.

5. The in-mold riveting mold according to claim 4, characterized in that: The abutting mechanism and the second mold wall are both arranged on the fixed mold, the fixed mold is located below the movable mold, and each of the driving mechanisms corresponds to a molding mechanism and an abutting mechanism.

6. The in-mold riveting die according to claim 5, characterized in that: The forming mechanism comprises at least two symmetrically arranged wall pressing units.

7. The in-mold riveting die according to claim 6, characterized in that: The wall pressing unit comprises first pressing walls located at two ends of each first mold wall and a second pressing wall located at a range of the first mold wall away from the mold cavity.

8. The in-mold riveting die according to claim 7, characterized in that: The mold cavity is also provided with a matching wall that can match with the raised part on the surface of the workpiece, and the matching wall includes an outer matching wall and an inner matching wall. The outer matching wall is respectively arranged on the surfaces of the first mold wall, the second mold wall, and the third mold wall facing the center of the workpiece, and the inner matching wall is arranged on the movable mold and at a position corresponding to the outer matching wall.

9. The in-mold riveting die according to claim 8, characterized in that: The first mold wall, the third mold wall, the first pressure wall and the second pressure wall all include a slide rail, a slider sliding on the slide rail and a reset component that can drive the slider to return to an initial position. The driving mechanism includes a fixed column and a top block arranged on the head of the fixed column. The slider and the top block are both trapezoidal.

10. The in-mold riveting die according to claim 4, characterized in that: During the mold closing process, the first mold wall and the third mold wall contact the corresponding driving mechanism in sequence, and when the next mold wall starts to contact the corresponding driving mechanism, the previous mold wall has completed the sliding stroke.

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