Flexible forming die for corner piece

Abstract

The utility model relates to a kind of corner piece flexible forming die, including base and the lower pressing unit being set to the upper portion of base, two groups of symmetrical arrangement movable die seat are slidably arranged on base, each movable die seat is equipped with positioning mechanism, the outside of movable die seat is equipped with lower guide, the lower portion of lower pressing unit is equipped with the upper guide matched with lower guide, guiding slide is equipped on lower guide, multiple guide wheels are rotatably arranged at the position corresponding with guiding slide, the utility model is to provide a kind of corner piece flexible forming die to solve the technical problem that existing corner piece forming die is easily worn, which affects the service life and precision of mould and lacks effective positioning mechanism.

Description

Technical Field

[0001] This utility model belongs to the technical field of corner forming devices, and in particular relates to a flexible corner forming mold. Background Technology

[0002] Corner fittings are common sheet metal forming components. Currently, these corner fittings are mainly formed using stamping dies with a wedge mechanism. The wedge mechanism converts the vertical motion of the stamping press into the lateral motion of the movable die base by sliding the wedge face against the wedge, thereby extruding the material from the side to complete the corner forming.

[0003] However, the aforementioned molds relying on wedge drives have the following technical defects: 1. The wedge components are in rigid sliding contact between metal and metal. During high-speed, high-pressure stamping, huge friction and severe impact are generated between the inclined surfaces, causing rapid wear of the contact surfaces. Consequently, the final positioning position of the movable mold base gradually changes with wear, resulting in a decrease in the dimensional accuracy of the corner pieces; 2. The lack of an effective positioning mechanism means that when the movable mold base closes laterally, it applies huge lateral friction to the blank, which can easily cause the blank to slide or shift in the early stages of forming. For corner pieces with symmetrical structures, this shift will directly lead to uneven material flow on both sides of the corner, resulting in quality defects such as uneven wall thickness and asymmetrical contours in the formed parts, seriously affecting the strength and aesthetics of the product. Utility Model Content

[0004] The purpose of this utility model is to provide a flexible corner molding die to solve the technical problems of existing corner molding dies being easily worn, which affects the die's lifespan and accuracy, as well as the lack of an effective positioning mechanism.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a flexible corner molding die, including a base and a pressing unit disposed above the base. Two sets of symmetrically arranged movable mold seats are slidably disposed on the base. Each movable mold seat is provided with a positioning mechanism. A lower guide is installed on the outer side of the movable mold seat. An upper guide that cooperates with the lower guide is provided below the pressing unit. A guide groove is provided on the lower guide. Multiple guide wheels are rotatably disposed on the upper guide at positions corresponding to the guide groove.

[0006] Preferably, the positioning mechanism includes a first push cylinder and a baffle plate. The first push cylinder is longitudinally mounted on one side of the movable mold base, and the baffle plate is controlled to move longitudinally relative to the movable mold base by the first push cylinder.

[0007] Preferably, the piston rod end of the first push cylinder is connected to a fixing plate, and a second push cylinder is horizontally mounted on the fixing plate. The baffle is fixedly connected to the piston rod of the second push cylinder, and the baffle is driven by the second push cylinder to move laterally to the upper surface position of the movable mold base.

[0008] Preferably, both the lower guide and the upper guide are inclined structures. The guide groove is provided on the inclined surface of the lower guide, and a pulley groove is provided on the inclined surface of the upper guide. Multiple guide wheels are rotatably installed in the pulley groove. When the pressing unit moves downward under the action of the driving mechanism, the upper guide and the lower guide cooperate through the inclined surfaces, causing the two sets of symmetrically arranged movable mold bases to move towards each other.

[0009] Preferably, during the relative movement of the two sets of movable mold bases, the guide wheel rolls from top to bottom along the guide groove, keeping the inclined surfaces of the upper guide member and the lower guide member in contact.

[0010] Preferably, a forming head and multiple pressing blocks are provided below the pressing unit, and several elastic units are provided between each pressing block and the pressing unit. The pressing blocks are used to cooperate with the movable mold base to clamp the blank.

[0011] Preferably, each of the movable mold bases has a semi-forming mold opening at its inner end. When the two movable mold bases are closed, the two semi-forming mold openings together form a closed mold opening that matches the shape of the forming head.

[0012] Preferably, each of the four corners of the base is provided with a column, and the upper guide is slidably engaged with the column.

[0013] Preferably, the base is provided with multiple slide rails, and the two sets of movable mold bases slide relative to each other through the slide rails.

[0014] Preferably, the two sets of movable mold bases are arranged in a mirror image with left and right symmetry, and a reset member is connected between them to provide a reset force to separate them after the mold is closed.

[0015] Through the above technical solution, compared with the prior art, this utility model has the following beneficial effects: First, by setting guide grooves and guide wheels on the cooperating lower and upper guide members respectively, the rolling contact of the guide wheels in the guide grooves replaces the rigid sliding of the traditional wedge, significantly reducing friction and impact, and slowing down the wear of the contact surface, thereby ensuring the long-term stability of the movable mold base positioning, improving the consistency of the corner piece forming dimensions, and solving the technical problem that the existing corner piece forming mold is prone to wear, which affects the mold life and accuracy; Second, by setting a positioning... The positioning mechanism consists of a first pushing cylinder, a second pushing cylinder, and a baffle. When the blank is placed on the movable mold base, the baffle is driven by the cooperation of the first and second pushing cylinders, so that the baffle and the sides of the blank abut against each other, thereby fixing the blank to be processed in the designated position of the movable mold base. The baffle restricts the offset of the blank, thereby avoiding the blank sliding or offset caused by lateral friction, ensuring that the material flows evenly on both sides of the corner piece, and that the wall thickness of the molded part is consistent and the contour is symmetrical, thus improving the strength and quality of the product and solving the technical problem of the lack of an effective positioning mechanism in the existing corner piece forming mold. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a side view of the structure of this utility model; Figure 3 This is a schematic diagram of the base and pressing unit in their separate states according to this utility model. Figure 4 This is a schematic diagram of the bottom structure of the pressing unit of this utility model; Figure 5 For the present utility model Figure 4 A magnified structural diagram of point A; Figure 6 This is a schematic diagram of the movable mold base structure of this utility model; The utility model reference information is as follows: 1. Base; 2. Pressing unit; 3. Movable mold base; 4. Lower guide; 5. Upper guide; 6. Positioning mechanism; 101. Column; 102. Slide rail; 201. Forming head; 202. Pressing block; 203. Elastic unit; 301. Semi-forming mold opening; 302. Closed mold opening; 303. Slider; 401. Guide groove; 501. Guide wheel; 502. Pulley groove; 601. First push cylinder; 602. Baffle; 603. Fixing plate; 604. Second push cylinder; The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0018] The following will refer to the appendix in the embodiments of this utility model. Figure 1-6 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0019] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0020] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0021] like Figure 1-6As shown: A flexible corner molding die includes a base 1 serving as a mounting base and load-bearing foundation, and a pressing unit 2 disposed above the base. The pressing unit 2 provides a vertically downward active pressing force through a drive mechanism (not shown in the figure, which may be a hydraulic cylinder, pneumatic cylinder, or servo electric cylinder). The upper surface of the pressing unit 2 is designed with a connecting part, which is typically a rigid structure with threaded holes or flanges, for establishing a stable mechanical connection with the piston rod or push rod of the drive mechanism, thereby transmitting the driving force to the pressing unit. Two sets of movable mold bases 3 are symmetrically arranged on the base 1, mirror-shaped about the mold centerline, and can move relative to or away from each other along a specific trajectory. Each movable mold base 3 has a positioning mechanism 6 on its side for precisely positioning the placed blank before molding. To guide and balance the mold closing process, lower guide members 4 are installed on the outer side of the movable mold base 3. In this embodiment, two sets of lower guide members 4 are respectively provided on both sides of the two sets of movable mold bases 3, for a total of four, thus forming a stable force and avoiding uneven pressure on the mold base during movement. Corresponding to the lower guide members 4, upper guide members 5 are fixed below the pressing unit 2, with the same number as the lower guide members 4. The upper guide members 5 are rigidly connected to the lower surface of the pressing unit 2 through a fixed mounting block (which can be a welded or bolted connection structure). The lower guide members 4 have a guide groove 401 with an inner groove in the shape of an arc. At the corresponding position of the upper guide members 5, multiple evenly arranged guide wheels 501 are rotatably installed. It should be noted that the guide wheels 501 are rotatably connected to the upper guide members 5 through bearings. When the guide wheels 501 are embedded in the guide groove 401, their rim curved surface contacts the inner wall of the arc surface of the guide groove 401.

[0022] The lower guide 4 and the upper guide 5 form a motion conversion mechanism. The lower guide 4 is fixed to the outside of the movable mold base 3, and the upper guide 5 is fixed to the pressing unit 2. They are in contact through inclined surfaces, and the cooperation between the guide wheel 501 and the guide groove 401 serves as a precise guiding constraint.

[0023] like Figure 6 As shown: The positioning mechanism 6 includes a first pushing cylinder 601 and a baffle 602. The first pushing cylinder 601 is fixedly mounted on one side of the movable mold base 3 longitudinally, that is, perpendicular to the sliding direction of the movable mold base 3, via a mounting seat on its cylinder body. The end of its piston rod is connected to the baffle 602 or the intermediate mechanism that drives the baffle 602. By controlling the extension and retraction of the piston rod of the first pushing cylinder 601, the baffle 602 can be driven to move longitudinally, that is, up and down, relative to the movable mold base 3. In this way, the automatic positioning of the blank placement is realized, replacing manual placement, improving production efficiency and positioning consistency. Furthermore, the baffle 602 can be raised before mold closing to position the blank, and lowered during or after mold closing, thereby effectively avoiding the pressing unit 2 and its forming head 201 and other components, preventing motion interference, and ensuring the smooth progress of the forming process.

[0024] like Figure 6 As shown: To achieve more precise lateral positioning of the billet, the positioning mechanism offers another optimized design: a fixed plate 603 is connected to the piston rod end of the first push cylinder 601. This fixed plate 603 serves as the mounting platform for the secondary drive mechanism. A second push cylinder 604 is mounted on this fixed plate 603 laterally, parallel to the sliding direction of the movable mold base 3, and a baffle 602 is directly fixedly connected to the piston rod end of the second push cylinder 604. Driven by the second push cylinder 604, the lateral movement of the baffle 602 can be precisely controlled, allowing it to extend to a specific position on the upper surface of the movable mold base 3, thus laterally limiting the billet placed there. Through the coordinated operation of the first push cylinder 601 and the second push cylinder 604, the baffle 602 is given two degrees of freedom of movement, enabling it to accurately push the billet to the preset ideal initial position on the movable mold base 3.

[0025] like Figure 1-5 As shown: Both the lower guide 4 and the upper guide 5 are designed with inclined surfaces. The guide groove 401 is machined on the inclined surface of the lower guide 4. Correspondingly, a pulley groove 502 is provided on the inclined surface of the upper guide 5. Multiple guide wheels 501 are rotatably installed in this pulley groove 502 through a rotating shaft and bearings, with their rims protruding to embed into the guide groove 401 of the lower guide 4. The working principle is as follows: When the pressing unit 2 moves downward under the action of the driving mechanism, the upper guide 5 fixed on it descends accordingly. The inclined surface of the upper guide 5 begins to contact the inclined surface of the lower guide 4, and under the action of vertical pressure, the two sets of symmetrically arranged lower guides 4, together with their fixed movable mold bases 3, are forced to move towards each other along the slide rail 102 on the base 1 through the squeezing of the inclined surfaces, thereby realizing mold closing.

[0026] like Figure 3-5 As shown, during the process of the two sets of movable mold bases 3 moving towards each other driven by the inclined plane, the guide wheel 501 mounted on the upper guide 5 rolls downwards along the guide groove 401 on the lower guide 4. This rolling process not only greatly reduces friction, but also, because the arc-shaped inner groove of the guide groove 401 is precisely calculated and machined, it can accurately guide the inclined planes of the upper guide 5 and the lower guide 4 to maintain a tight fit throughout the entire mold closing stroke. By replacing sliding friction with rolling friction, wear is significantly reduced, the service life and reliability of the guiding mechanism are improved, and maintenance requirements are reduced.

[0027] like Figure 1-4As shown: A forming head 201 is located at the center of the lower part of the pressing unit 2, and multiple pressing blocks 202 are distributed around it. Several elastic units 203 are arranged between each pressing block 202 and the main structure of the pressing unit 2. The elastic units 203 are preferably high-strength mechanical spring assemblies. The main function of these pressing blocks 202 is to cooperate with the upper surface of the closed movable mold base 3, contacting the blank before the forming head 201 in the initial stage of forming and pressing it firmly to form a pressing force.

[0028] like Figure 6 As shown: The inner end of each movable mold base 3 is machined with a semi-forming mold opening 301. For example... Figure 3 As shown, when the two movable mold bases 3 are fully closed under the driving action, the two semi-forming mold openings 301 are exactly aligned, forming a complete closed mold opening 302 (i.e., the final forming cavity) that is precisely matched with the shape of the forming head 201. The blank is subjected to the pressure of the forming head 201 in this closed cavity, and deforms, eventually forming the required corner shape.

[0029] like Figure 1-3 As shown: To ensure smooth movement of the pressing unit 2 under enormous vertical pressure without deviation or torsion, columns 101 are provided at each of the four corners of the base 1. The upper guide 5 or components connected to it have sliding ends, forming a sliding fit with the grooves on these columns 101, creating a second guiding system. The base 1 also has multiple slide rails 102, and the two sets of movable mold bases 3 slide relative to each other through the sliders 303 at their bottom. Furthermore, a reset element (not shown in the figure), preferably a tension spring or spring, connects the two sets of movable mold bases 3 arranged symmetrically in mirror image. The function of this reset element is to provide a reset force to separate the two movable mold bases 3 when the molding process ends and the driving mechanism moves the pressing unit 2 upwards, allowing them to quickly and reliably return to the open mold state, facilitating the removal of the molded workpiece and the insertion of a new blank.

[0030] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A flexible corner molding die, comprising a base (1) and a pressing unit (2) disposed above the base, wherein two sets of symmetrically arranged movable mold bases (3) are slidably disposed on the base (1), characterized in that: Each of the movable mold bases (3) is provided with a positioning mechanism (6). A lower guide (4) is installed on the outside of the movable mold base (3). An upper guide (5) that cooperates with the lower guide (4) is provided below the pressing unit (2). A guide groove (401) is provided on the lower guide (4). Multiple guide wheels (501) are rotatably provided on the upper guide (5) at the position corresponding to the guide groove (401).

2. The corner piece flexible forming mold according to claim 1, characterized in that: The positioning mechanism includes a first push cylinder (601) and a baffle (602). The first push cylinder (601) is longitudinally installed on one side of the movable mold base (3), and the baffle (602) is controlled to move longitudinally relative to the movable mold base (3) by the first push cylinder (601).

3. The flexible corner molding die according to claim 2, characterized in that: The piston rod end of the first push cylinder (601) is connected to a fixed plate (603), and a second push cylinder (604) is horizontally mounted on the fixed plate (603). The baffle (602) is fixedly connected to the piston rod of the second push cylinder (604). The baffle (602) is driven by the second push cylinder (604) to move laterally to the upper surface of the movable mold base (3).

4. The flexible corner molding die according to claim 1, characterized in that: Both the lower guide (4) and the upper guide (5) are inclined structures. The guide groove (401) is provided on the inclined surface of the lower guide (4). The upper guide (5) has a pulley groove (502) on its inclined surface. Multiple guide wheels (501) are rotatably installed in the pulley groove (502). When the pressing unit (2) moves downward under the action of the driving mechanism, the upper guide (5) and the lower guide (4) cooperate through the inclined surfaces, causing the two sets of symmetrically arranged movable mold bases (3) to move towards each other.

5. The flexible corner molding die according to claim 4, characterized in that: During the relative movement of the two sets of movable mold bases (3), the guide wheel (501) rolls from top to bottom along the guide groove (401) and keeps the inclined surfaces of the upper guide (5) and the lower guide (4) in contact.

6. The flexible corner molding die according to claim 1, characterized in that: The pressing unit (2) is provided with a forming head (201) and a plurality of pressing blocks (202) below it. Each pressing block (202) is provided with a plurality of elastic units (203) between it and the pressing unit (2). The pressing block (202) is used to cooperate with the movable mold base (3) to clamp the blank.

7. A flexible corner molding die according to claim 6, characterized in that: Each of the movable mold bases (3) has a semi-forming mold opening (301) at its inner end. When the two movable mold bases (3) are closed, the two semi-forming mold openings (301) together form a closed mold opening (302) that matches the shape of the forming head (201).

8. The flexible corner molding die according to claim 1, characterized in that: The base (1) is provided with columns (101) at each of its four corners, and the upper guide (5) slides and engages with the columns (101) in a vertical manner.

9. A flexible corner molding die according to claim 1, characterized in that: The base (1) is provided with multiple slide rails (102), and the two sets of movable mold bases (3) slide relative to each other through the slide rails (102).

10. A flexible corner molding die according to any one of claims 1-9, characterized in that: The two sets of movable mold bases (3) are arranged in a mirror image with left and right symmetry, and a reset component is connected between them to provide a reset force to separate them after the mold is closed.

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