A rigid blank holder for deep drawing

Abstract

This invention relates to the technical field of deep drawing equipment, and in particular to a rigid edge clamping device for deep drawing; its structural layout is more reasonable, it relieves stress on the rigid edge ring, has a scientific structure, reduces energy consumption, and effectively improves the efficiency and ease of operation of sheet metal deep drawing; it includes a press body, a deep drawing die, a deep drawing punch, and an edge clamping mechanism. The press body includes a frame, a pressure platform, a lifting platform, and a first drive cylinder. The first drive cylinder is fixedly installed on the upper part of the frame, the pressure platform is located at the bottom of the frame, the deep drawing die is installed on the pressure platform, the lifting platform is slidably installed on the frame, the output end of the first drive cylinder is fixedly connected to the lifting platform, the deep drawing punch is installed at the bottom of the lifting platform, and the deep drawing die is provided with a die groove that matches the deep drawing punch. The edge clamping mechanism includes an edge clamping plate and an edge clamping drive mechanism symmetrically arranged on the pressure platform. The edge clamping drive mechanism includes two symmetrically arranged edge clamping drive components and a bidirectional drive cylinder.

Description

Technical Field

[0001] This invention relates to the technical field of deep drawing equipment, and in particular to a rigid blank holder for deep drawing. Background Technology

[0002] As is well known, a rigid blank holder for deep drawing is a device used for deep drawing and forming of sheet metal. Publication (Announcement) No. CN201371193Y discloses a coaxial linkage deep drawing blank holder for liquid filling forming of sheet metal. Its characteristic is that it consists of two parts: a deep drawing slide and a blank holder slide. The deep drawing slide mainly comprises a punch, a lower deep drawing slide with a guide hole mounted on the punch and connected to the punch by screws, a deep drawing guide post mounted on the lower deep drawing slide, and an upper deep drawing slide with a guide hole mounted on the deep drawing guide post. The upper deep drawing slide, the deep drawing guide post, and the lower deep drawing slide... The slider, connected by a nut, forms a closed rigid body to transmit load. The blank holder slider mainly consists of a blank holder ring with a punch guide hole, a lower blank holder slider with a punch guide hole on the blank holder ring, a blank holder guide post on the lower blank holder slider, and an upper blank holder slider with a guide hole on the blank holder guide post. The upper and lower blank holder sliders and the blank holder guide post are connected by screws to form a closed rigid body. The blank holder guide post slides within the guide hole of the lower blank holder slider, and the drawing guide post slides within the guide hole of the upper blank holder slider. The punch slides through the punch guide holes on the lower blank holder slider and the blank holder ring. It has the advantages of simple structure and high precision. However, during the deep drawing process of sheet metal, the exposed rigid edge ring of the formed part at the die groove has certain stress, which needs to be addressed by a blank holder device. But this blank holder device consumes a lot of energy, affecting the normal deep drawing feed of the sheet metal. The ease of operation and the efficiency of sheet metal deep drawing need further improvement. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this invention provides a rigid edge clamping device for deep drawing with a more rational structural layout, which relieves stress on the rigid edge ring, has a scientific structure, reduces energy consumption, and effectively improves the efficiency and ease of operation of sheet metal deep drawing.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the present invention provides the following technical solution: a press body, a drawing die, a drawing punch, and a blank holder mechanism. The press body includes a frame, a pressure table, a lifting platform, and a first drive cylinder. The first drive cylinder is fixedly installed on the upper part of the frame. The pressure table is located at the bottom of the frame. The drawing die is installed on the pressure table. The lifting platform is slidably installed on the frame. The output end of the first drive cylinder is fixedly connected to the lifting platform. The drawing punch is installed at the bottom of the lifting platform. The drawing die has a groove that matches the drawing punch. The blank holder mechanism includes... The device includes a pressure plate and a pressure drive mechanism symmetrically arranged on a pressure platform. The pressure plate is slidably mounted on the pressure platform and has a through-hole that allows the drawing punch to pass through. The pressure drive mechanism includes two symmetrically arranged pressure drive components and a bidirectional drive cylinder. Each pressure drive component includes a mounting base, a drive shaft rotatably mounted on the mounting base, a cam fixedly mounted on the drive shaft, and a drive rod fixedly connected to the drive shaft. The cam contacts the top of the pressure plate, and the two output ends of the bidirectional drive cylinder are respectively hinged to the drive rods on the two corresponding pressure drive components.

[0007] Preferably, a sliding column is fixedly installed at the bottom of the pressing plate, and a cylindrical slot is provided on the pressure platform to fit the sliding column. The sliding column is slidably installed in the cylindrical slot. A spring is sleeved on the sliding column. One end of the spring is connected to the bottom of the pressing plate, and the other end of the spring is connected to the top of the pressure platform.

[0008] Preferably, a U-shaped limiting frame is installed on the drawing die; further, the height of the U-shaped limiting frame is equidistant from the thickness of the sheet metal to be processed, and the opening of the U-shaped limiting frame faces forward.

[0009] Preferably, the pressure plate is provided with an installation groove communicating with the mold groove, and a first push-out material unloading assembly is installed in the installation groove. The first push-out material unloading assembly includes a second drive cylinder and an annular push plate, and the annular push plate is fixedly installed at the output end of the second drive cylinder.

[0010] Preferably, a second push-and-unload assembly is installed at the rear of the pressure platform. The second push-and-unload assembly includes a third drive cylinder and a unloading push plate. The third drive cylinder is fixedly installed at the rear of the pressure platform, and the unloading push plate is fixedly installed at the output end of the third drive cylinder.

[0011] Preferably, the pressing plate is equipped with a sliding groove that engages with the cam.

[0012] Preferably, it also includes a loading / unloading platform hinged to the front of the pressure platform and two fourth drive cylinders, one end of the two fourth drive cylinders being hinged to the pressure platform and the other end of the two fourth drive cylinders being hinged to the front side of the bottom of the loading / unloading platform.

[0013] Preferably, the drawing die is detachably mounted on the pressure plate by bolts, and the drawing punch is detachably mounted on the lifting platform by bolts.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, the present invention provides a rigid edge clamping device for deep drawing, which has the following beneficial effects: This rigid edge clamping device for deep drawing places the sheet metal on the top of the deep drawing die, and the edge clamping plate presses down on the top of the sheet metal. The first drive cylinder drives the lifting frame to move downward, while the deep drawing punch presses the sheet metal into the die groove. At the same time, the two output ends of the bidirectional drive cylinder extend synchronously. After the drive rod and drive shaft rotate, the cam rotates and presses down on the edge clamping plate. The edge clamping plate presses down on the rigid edge ring of the sheet metal during the deep drawing process. Under the action of the cam, drive shaft and drive rod, the lever principle is used to apply a small force through the bidirectional drive cylinder to drive the edge clamping plate to break the deep drawing stress generated during the deep drawing process of the sheet metal. This achieves the effect of a small device drawing a larger depth than its own drawing capacity, that is, achieving the purpose of a small device pulling a large load. The structural layout is more reasonable, the rigid edge ring stress is relieved, the structure is scientific, energy consumption is reduced, and the efficiency and ease of operation of sheet metal deep drawing are effectively improved. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the front structure of the present invention;

[0018] Figure 3 This is a top view of the structure of the present invention;

[0019] Figure 4 This is the invention Figure 2 Schematic diagram of the cross-sectional structure at point AA;

[0020] Figure 5 This is the invention Figure 2 Schematic diagram of the cross-sectional structure at point BB;

[0021] The following are labels in the attached diagram: 1. Drawing die; 2. Drawing punch; 3. Frame; 4. Pressure plate; 5. Lifting platform; 6. First drive cylinder; 7. Die groove; 8. Blank holder plate; 9. Through port; 10. Bidirectional drive cylinder; 11. Mounting base; 12. Drive shaft; 13. Drive rod; 14. Sliding column; 15. Columnar slot; 16. Spring; 17. U-shaped limit frame; 18. Mounting groove; 19. Second drive cylinder; 20. Annular push plate; 21. Third drive cylinder; 22. Unloading push plate; 23. Slide groove; 24. Loading and unloading platform; 25. Fourth drive cylinder; 26. Cam. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figure 1-5 The present invention discloses a rigid blank holder for deep drawing, comprising a press body, a deep drawing die 1, a deep drawing punch 2, and a blank holder mechanism. The press body includes a frame 3, a pressure table 4, a lifting table 5, and a first drive cylinder 6. The first drive cylinder 6 is fixedly installed on the upper part of the frame 3, the pressure table 4 is located at the bottom of the frame 3, the deep drawing die 1 is installed on the pressure table 4, the lifting table 5 is slidably installed on the frame 3, the output end of the first drive cylinder 6 is fixedly connected to the lifting table 5, the deep drawing punch 2 is installed at the bottom of the lifting table 5, and the deep drawing die 1 is provided with a die groove 7 that fits with the deep drawing punch 2. The blank holder mechanism includes a blank holder plate 8 and blank holder drive mechanisms symmetrically arranged on the pressure table 4. The blank holder plate 8 is slidably installed on the pressure table 4, and the blank holder plate 8 is... The device is provided with a through-hole 9 that allows the drawing punch 2 to pass through. The blanking drive mechanism includes two symmetrically arranged blanking drive components and a bidirectional drive cylinder 10. The blanking drive component includes a mounting base 11, a drive shaft 12 rotatably mounted on the mounting base 11, a cam 26 fixedly mounted on the drive shaft 12, and a drive rod 13 fixedly connected to the drive shaft 12. The cam 26 contacts the top of the blanking plate 8. The two output ends of the bidirectional drive cylinder 10 are respectively hinged to the drive rods 13 on the two corresponding blanking drive components. The two output ends of the bidirectional drive cylinder 10 extend synchronously, and the drive rods 13 on the two corresponding blanking drive components move away from each other. The drive shaft 12 drives the cam 26 to rotate, and the protrusion on the cam 26 pushes the blanking plate 8 to move down, pressing the edge of the drawn sheet metal.

[0024] Specifically, a sliding column 14 is fixedly installed at the bottom of the pressing plate 8, and a cylindrical slot 15 that fits the sliding column 14 is provided on the pressure platform 4. The sliding column 14 is installed in the cylindrical slot 15 and can slide up and down. A spring 16 is sleeved on the sliding column 14. One end of the spring 16 is connected to the bottom of the pressing plate 8, and the other end of the spring 16 is connected to the top of the pressure platform 4. With the setting of the spring 16, after the cam 26 disengages from pressing the pressing plate 8, the pressing plate 8 can be automatically reset without human intervention. The sheet material can be fed from the bottom of the raised pressing plate 8 to the drawing die 1, which further reduces the amount of manual operation and improves the convenience of feeding the sheet material.

[0025] Specifically, a U-shaped limiting frame 17 is installed on the deep drawing die 1; furthermore, the height of the U-shaped limiting frame 17 is equidistant from the thickness of the sheet metal to be processed, and the opening of the U-shaped limiting frame 17 faces forward; the U-shaped limiting frame 17 can limit the feeding sheet metal to ensure the processing accuracy of the deep-drawn parts. At the same time, during the deep drawing process, the bottom of the pressing plate 8 contacts the top of the U-shaped limiting frame 17 to prevent the pressing plate 8 from moving down too much, which would make it difficult for the sheet metal to be pressed into the die groove 7, thus ensuring the smooth progress of the sheet metal deep drawing operation.

[0026] Specifically, the pressure plate 4 is provided with an installation groove 18 that communicates with the mold groove 7. The first push-out component is installed in the installation groove 18. The first push-out component includes a second drive cylinder 19 and an annular push plate 20. The annular push plate 20 is fixedly installed at the output end of the second drive cylinder 19. When the sheet is drawn and formed, the edge pressing mechanism is reset, the output end of the second drive cylinder 19 is extended, and the annular push plate 20 pushes the formed part out of the mold groove 7, improving the convenience of unloading the formed part.

[0027] Specifically, a second push-out component is installed at the rear of the pressure platform 4. The second push-out component includes a third drive cylinder 21 and a push plate 22. The third drive cylinder 21 is fixedly installed at the rear of the pressure platform 4, and the push plate 22 is fixedly installed at the output end of the third drive cylinder 21. When the molded part moves out of the mold groove 7, the output end of the third drive cylinder 21 extends, and the push plate 22 pushes the molded part out from the drawing die 1. There is no need for manual unloading of the molded part under the pressure plate 8, which reduces the incidence of mechanical injury accidents and further improves the convenience of unloading.

[0028] Specifically, the pressing plate 8 is equipped with a sliding groove 23 that engages with the cam 26; the sliding groove 23 can limit the rotation of the cam 26, and at the same time, each cam 26 effectively limits the pressing plate 8 to prevent the pressing plate 8 from shifting, so as to ensure that the cam 26 can more smoothly press and drive the pressing plate 8.

[0029] Specifically, it also includes a loading / unloading platform 24 hinged to the front of the pressure platform 4 and two fourth drive cylinders 25. One end of the two fourth drive cylinders 25 is hinged to the pressure platform 4, and the other end of the two fourth drive cylinders 25 is hinged to the bottom front side of the loading / unloading platform 24. The loading / unloading platform 24 can push and load the sheet metal. When unloading the molded part, the output end of the two fourth drive cylinders 25 is shortened, and the front of the loading / unloading platform 24 is tilted downward. The molded part slides down from the loading / unloading platform 24 by itself under the action of gravity, without the need for manual unloading of the molded part, further reducing the amount of manual operation.

[0030] Specifically, the drawing die 1 is detachably mounted on the pressure table 4 by bolts, and the drawing punch 2 is detachably mounted on the lifting table 5 by bolts; the drawing die 1 and drawing punch 2 of different sizes and shapes can be replaced according to the drawing processing requirements of the sheet metal to improve the applicability of the device.

[0031] In use, the sheet metal is placed on the loading and unloading platform 24 and pushed into the U-shaped limiting frame 17 on the deep drawing die 1. The bidirectional drive cylinder 10 is activated, and after being driven by the drive rod 13 and drive shaft 12, the cam 26 rotates and pushes the pressing plate 8 downward until the bottom of the pressing plate 8 contacts the top of the U-shaped limiting frame 17. Then, the first drive cylinder 6 is activated, and the lifting platform 5 drives the deep drawing punch 2 to move downward. The deep drawing punch 2 passes through the through hole 9 and presses the sheet metal into the die groove 7. The sheet metal is deep-drawn and shaped. The deep drawing punch 2 returns to its original position, the bidirectional drive cylinder 10 returns to its original position, and the cam 26 rotates. 6. The pressure plate 8 is released from the pressure plate. Under the action of the spring 16, the pressure plate 8 is reset. At this time, the output end of the second drive cylinder 19 extends and the annular push plate 20 pushes the forming part out of the mold groove 7 until the bottom of the forming part is flush with the top surface of the deep drawing die 1. At this time, the output end of the third drive cylinder 21 extends and the unloading push plate 22 pushes the forming part to the upper and lower material platforms 24. The output end of the fourth drive cylinder 25 extends and the front part of the upper and lower material platforms 24 tilts downward. Under the action of gravity, the forming part slides down from the upper and lower material platforms 24 to complete the deep drawing process of the sheet metal.

[0032] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," "some embodiments," etc., mentioned in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0033] It should be readily understood that the terms “on,” “above,” and “on top of” in this disclosure should be interpreted in the broadest possible sense, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on something” but also “on something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0034] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A rigid blank holder for deep drawing, characterized in that, It includes the press body, drawing die (1), drawing punch (2) and blank holder mechanism; The press body includes a frame (3), a pressure plate (4), a lifting platform (5) and a first drive cylinder (6). The first drive cylinder (6) is fixedly installed on the upper part of the frame (3). The pressure plate (4) is located at the bottom of the frame (3). The drawing die (1) is installed on the pressure plate (4). The lifting platform (5) is slidably installed on the frame (3). The output end of the first drive cylinder (6) is fixedly connected to the lifting platform (5). The drawing punch (2) is installed at the bottom of the lifting platform (5). The drawing die (1) is provided with a die groove (7) that matches the drawing punch (2). The pressing mechanism includes a pressing plate (8) and a pressing drive mechanism symmetrically arranged on the pressure table (4). The pressing plate (8) is slidably mounted on the pressure table (4). The pressing plate (8) is provided with a through-hole (9) that allows the drawing punch (2) to pass through. The pressing drive mechanism includes two symmetrically arranged pressing drive components and a bidirectional drive cylinder (10). The pressing drive assembly includes a mounting base (11), a drive shaft (12) rotatably mounted on the mounting base (11), a cam (26) fixedly mounted on the drive shaft (12), and a drive rod (13) fixedly connected to the drive shaft (12). The cam (26) contacts the top of the pressing plate (8), and the two output ends of the bidirectional drive cylinder (10) are respectively hinged to the drive rods (13) on the two corresponding pressing drive assemblies.

2. The rigid blank holder for deep drawing according to claim 1, characterized in that, The bottom of the pressing plate (8) is fixedly installed with a sliding column (14). The pressure platform (4) is provided with a cylindrical slot (15) that matches the sliding column (14). The sliding column (14) is installed in the cylindrical slot (15) and can slide up and down. A spring (16) is sleeved on the sliding column (14). One end of the spring (16) is connected to the bottom of the pressing plate (8), and the other end of the spring (16) is connected to the top of the pressure platform (4).

3. The rigid blank holder for deep drawing according to claim 2, characterized in that, A U-shaped limiting frame (17) is installed on the deep drawing die (1).

4. The rigid blank holder for deep drawing according to claim 3, characterized in that, The pressure plate (4) is provided with an installation groove (18) that communicates with the mold groove (7). A first push-out component is installed in the installation groove (18). The first push-out component includes a second drive cylinder (19) and an annular push plate (20). The annular push plate (20) is fixedly installed at the output end of the second drive cylinder (19).

5. The rigid blank holder for deep drawing according to claim 4, characterized in that, The pressure platform (4) is equipped with a second push-out unloading assembly at the rear. The second push-out unloading assembly includes a third drive cylinder (21) and a unloading push plate (22). The third drive cylinder (21) is fixedly installed at the rear of the pressure platform (4), and the unloading push plate (22) is fixedly installed at the output end of the third drive cylinder (21).

6. The rigid blank holder for deep drawing according to claim 5, characterized in that, The pressing plate (8) is equipped with a sliding groove (23) that engages with the cam (26).

7. The rigid blank holder for deep drawing according to claim 6, characterized in that, It also includes a loading / unloading platform (24) hinged to the front of the pressure platform (4) and two fourth drive cylinders (25), one end of the two fourth drive cylinders (25) is hinged to the pressure platform (4), and the other end of the two fourth drive cylinders (25) is hinged to the bottom front side of the loading / unloading platform (24).

8. The rigid blank holder for deep drawing according to claim 7, characterized in that, The drawing die (1) is detachably mounted on the pressure plate (4) by bolts, and the drawing punch (2) is detachably mounted on the lifting plate (5) by bolts.

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