A multi-station conveying mold has a mechanical hand avoiding function

Abstract

This utility model belongs to the technical field of drawing station, and particularly relates to a material clamping mechanism with robotic arm avoidance function in a multi-station transfer die, including a lower die base, a drawing punch, and at least two material clamping devices. The drawing punch is set on the lower die base, and each material clamping device is set on the lower die base, located at the side end of the drawing punch and higher than the drawing punch. The material clamping device includes a blank holder ring, a float, several elastic reset members, and a nitrogen spring. The blank holder ring has an upward-opening mounting cavity, and the float is slidably set in the mounting cavity. The height of the mounting cavity is higher than the float. The end of the blank holder ring closer to the drawing punch is higher than the end farther away from the drawing punch. One end of each elastic reset member is connected to the lower die base, and the other end is connected to the blank holder ring. One end of the nitrogen spring is connected to the lower die base, and the other end passes through the blank holder ring and connects to the float. This ensures the integrity of the material clamping surface, effectively and reasonably controls the material flow during the drawing process, avoids wrinkling of the clamping surface, and thus improves the controllability of the drawing process and the product qualification rate.

Description

Technical Field

[0001] This utility model belongs to the field of drawing station technology, and in particular relates to a pressing mechanism with a robotic arm avoidance function in a multi-station transfer mold. Background Technology

[0002] In traditional drawing processes, the blank holder design requires notches to be machined at appropriate locations based on the shape and size of the robotic arm to facilitate material handling. However, to ensure the stability of the sheet metal during drawing and prevent deformation, four clamping points are typically installed on the sheet. These clamping points must avoid the robotic arm's path, creating localized areas of no clamping force near the arm's path. This design results in uneven clamping force on the sheet at these locations, leading to uneven material feeding during drawing. After drawing, the material is more prone to wrinkling or deformation in these un-clamped areas, ultimately affecting the quality and performance of the drawn part. Utility Model Content

[0003] The purpose of this invention is to provide a pressing mechanism with a robotic arm avoidance function within a multi-station transfer mold. This addresses the problem in existing technologies where the design of the pressing ring requires machining notches at appropriate locations based on the shape and size of the robotic arm to facilitate material handling. This results in localized areas of insufficient pressing force near the robotic arm's path, leading to uneven material feeding during the drawing process.

[0004] To achieve the above objectives, this utility model provides a material clamping mechanism with robotic arm avoidance function within a multi-station transfer mold, comprising a lower die base, a drawing punch, and at least two material clamping devices. The drawing punch is mounted on the lower die base, and each material clamping device is mounted on the lower die base, located at the side end of the drawing punch and higher than the drawing punch. The material clamping device includes a blank holder, a float, several elastic reset members, and a nitrogen spring. The blank holder has an upward-opening mounting cavity, and the float is slidably mounted in the mounting cavity. The height of the mounting cavity is higher than the float. The end of the blank holder closer to the drawing punch is higher than the end farther from the drawing punch. One end of each elastic reset member is connected to the lower die base, and the other end is connected to the blank holder. One end of the nitrogen spring is connected to the lower die base, and the other end passes through the blank holder and connects to the float.

[0005] Furthermore, it also includes several positioning fixtures, each of which is set on the lower die holder and located on one side of the drawing punch, for positioning the sheet material fed onto the drawing punch.

[0006] Furthermore, the float includes a forming part and a clearance part, which are arranged left and right, with the forming part close to the drawing punch shown.

[0007] Furthermore, both the forming part and the clearance part are located inside the mounting cavity, with the forming part being higher than the clearance part.

[0008] Furthermore, the blank holder is also provided with a pressure plate. One end of the pressure plate is located at the end of the blank holder away from the drawing punch, and the other end of the pressure plate extends towards the mounting cavity and is located at the upper end of the clearance part.

[0009] The above-mentioned technical solutions of the pressing mechanism with robotic arm avoidance function in the multi-station transfer mold provided by this utility model embodiment have at least one of the following technical effects: When the robotic arm feeds the blank onto the lower mold base, the blank holder is in a floating state, and the floating block is in a relatively low position. The robotic arm can directly put the blank into the mold. At this time, the blank abuts against the blank holder, the upper mold moves downward, the elastic reset member compresses the blank holder downward, and the floating block remains in a fixed position due to the action of the nitrogen spring. The upper mold continues to move downward, at which time the floating block contacts the blank, the nitrogen spring is compressed, and finally the blank holder and the floating block jointly press the blank. Under the combined action of the blank holder, the floating block, and the upper mold pressing plate, the drawing punch smoothly draws the blank into shape. After drawing is completed, the upper mold moves upward, the blank holder is reset and moves upward under the action of the elastic reset member, and the floating block is reset and moves upward under the action of the nitrogen spring, separating the product from the drawing punch. At this time, the robotic arm can take away the product. Setting the blank holder to a floating blank holder means that the float is recessed during material feeding, avoiding the robotic arm. As the upper die descends and the blank holder ring descends, the float moves upwards until it is flush with the blank holder ring surface, clamping the material together. This avoids hollowing out the blank holder surface while maintaining its integrity, effectively controlling material flow during drawing and preventing wrinkling caused by hollowing out the blank holder surface, thus improving drawing controllability and product yield. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model, 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 these drawings without creative effort.

[0011] Figure 1 This is a front sectional view of a pressing mechanism with a robotic arm avoidance function in a multi-station transfer mold, provided as an embodiment of the present invention.

[0012] Figure 2 A cross-sectional view of a pressing mechanism with a robotic arm avoidance function in a multi-station transfer mold, provided as an embodiment of this utility model.

[0013] Reference numerals: 100, lower die holder; 200, drawing punch; 300, blank holder; 310, blank holder ring; 311, mounting cavity; 312, pressure plate; 320, float; 321, forming part; 322, clearance part; 330, elastic reset part; 340, nitrogen spring; 400, positioning fixture. Detailed Implementation

[0014] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0015] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0016] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0017] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0018] In one embodiment of this utility model, reference is made to Figures 1-2As shown, a pressing mechanism with a robotic arm avoidance function in a multi-station transfer mold is provided, including a lower mold base 100, a drawing punch 200 and at least two pressing devices 300. A drawing punch 200 is mounted on a lower die holder 100. Each blank holder 300 is mounted on the lower die holder 100, located at the side end of the drawing punch 200 and higher than the drawing punch 200. The blank holder 300 includes a blank holder ring 310, a float 320, several elastic reset members 330, and a nitrogen spring 340. The blank holder ring 310 has an upward-opening mounting cavity 311. The float 320 is slidably mounted in the mounting cavity 311. The height of the mounting cavity 311 is higher than that of the float 320. The end of the blank holder ring 310 near the drawing punch 200 is higher than the end away from the drawing punch 200. One end of each elastic reset member 330 is connected to the lower die holder 100, and the other end is connected to the blank holder ring 310. One end of the nitrogen spring 340 is connected to the lower die holder 100, and the other end passes through the blank holder ring 310 and connects to the float 320. In this embodiment, when the robot arm places the material sheet onto the lower mold base 100, the pressure ring 310 is in a floating state, and the float 320 is in a relatively low position. The robot arm can directly put the material sheet into the mold. At this time, the material sheet abuts against the pressure ring 310. The upper mold moves downward, and the elastic reset member 330 compresses the pressure ring 310 downward. Due to the action of the nitrogen spring 340, the relative position of the float 320 remains unchanged. The upper mold continues to move downward. At this time, the float 320 contacts the material sheet, and the nitrogen spring 340 is compressed, finally achieving the state where the pressure ring 310 and the float 320 jointly press the material. Under the combined action of the blank holder 310, the float 320, and the upper die pressure plate, the drawing punch 200 smoothly draws the sheet into shape. After drawing, the upper die moves upward, the blank holder 310 is reset and moves upward under the action of the elastic reset member 330, and the float 320 is reset and moves upward under the action of the nitrogen spring 340, separating the product from the drawing punch 200. At this time, the pre-set product robot can take the product away. Setting the pressure device 300 to a floating pressure form means that the float 320 is recessed during material feeding, avoiding the robot. When the upper die moves downward, the blank holder 310 moves downward, and the float 320 moves upward relative to the blank holder 310 surface, pressing the material together with the blank holder 310. While avoiding hollowing out the pressure surface, the integrity of the pressure surface is ensured, effectively and reasonably controlling the material flow during the drawing process, effectively avoiding wrinkling caused by hollowing out the pressure surface, thereby improving the controllability of drawing and the product qualification rate.

[0019] Specifically, refer to Figures 1-2As shown, it also includes several positioning fixtures 400, each positioned on the lower die holder 100 and located on one side of the drawing punch 200, for positioning the sheet material fed onto the drawing punch 200. In this embodiment, when the robotic arm places the sheet material on the lower die holder 100, the positioning fixtures 400 guide the movement trajectory of the sheet material, while the sheet material rests on the pressure ring 310, preventing the drawing punch 200 from being scraped by the sheet material and causing deformation of the drawing punch 200.

[0020] Specifically, refer to Figures 1-2 As shown, the float 320 includes a forming part 321 and a clearance part 322, which are arranged left and right. The forming part 321 is close to the drawing punch 200. In this embodiment, when the sheet is unloaded, the forming part 321 is lower than the blank holder 310, which serves to clear the blank. When the sheet is drawn, the forming part 321 and the blank holder 310 cooperate to press the sheet, ensuring the integrity of the pressing surface. This effectively and reasonably controls the flow of material during the drawing process, effectively avoids wrinkling caused by hollowing out the pressing surface, and thus improves the controllability of the drawing process and the product qualification rate.

[0021] Specifically, refer to Figures 1-2 As shown, both the molding part 321 and the clearance part 322 are disposed in the mounting cavity 311, with the molding part 321 being higher than the clearance part 322.

[0022] Specifically, refer to Figures 1-2 As shown, the blank holder 310 is also provided with a pressure plate 312. One end of the pressure plate 312 is located at the end of the blank holder 310 away from the drawing punch 200, and the other end of the pressure plate 312 extends towards the mounting cavity 311 and is located at the upper end of the clearance portion 322. In this embodiment, when the upper die moves downward, the blank holder 310 moves downward first, driving the pressure plate 312 to move downward until the pressure plate 312 abuts against the clearance portion 322. At the same time, the forming portion 321 and the blank holder 310 cooperate with the upper die to draw and form the sheet. The pressure plate 312 ensures that the relative positions of the blank holder 310 and the float 320 are consistent each time the sheet is drawn, thus ensuring the integrity of the blank holder profile.

[0023] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pressing mechanism with robotic arm obstacle avoidance function in a multi-station conveying mold, characterized in that: The device includes a lower die base, a drawing punch, and at least two blank holders. The drawing punch is mounted on the lower die base, and each blank holder is mounted on the lower die base, located at the side end of the drawing punch and higher than the drawing punch. Each blank holder includes a blank holder ring, a float, several elastic reset members, and a nitrogen spring. The blank holder ring has an upward-opening mounting cavity. The float is slidably mounted in the mounting cavity, and the height of the mounting cavity is higher than the float. The end of the blank holder ring closer to the drawing punch is higher than the end farther from the drawing punch. One end of each elastic reset member is connected to the lower die base, and the other end is connected to the blank holder ring. One end of the nitrogen spring is connected to the lower die base, and the other end passes through the blank holder ring and connects to the float.

2. The pressing mechanism with robotic arm avoidance function in a multi-station conveying mold according to claim 1, characterized in that: It also includes several positioning fixtures, each of which is disposed on the lower die holder and located on one side of the drawing punch, for positioning the sheet material fed onto the drawing punch.

3. The pressing mechanism with robotic arm avoidance function in a multi-station conveying mold according to claim 1, characterized in that: The floating block includes a forming part and a clearance part, which are arranged left and right, with the forming part close to the drawing punch shown.

4. The pressing mechanism with robotic arm avoidance function in a multi-station conveying mold according to claim 3, characterized in that: Both the molding part and the clearance part are disposed within the mounting cavity, with the molding part being higher than the clearance part.

5. A pressing mechanism with robotic arm avoidance function in a multi-station conveying mold according to claim 4, characterized in that: The pressure ring is also provided with a pressure plate. One end of the pressure plate is located at the end of the pressure ring away from the drawing punch, and the other end of the pressure plate extends toward the mounting cavity and is located at the upper end of the clearance portion.

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