Sheet metal stamping combined die

Abstract

The utility model relates to the technical field of sheet metal stamping, in particular to a sheet metal stamping combined die which comprises a lower die base and an elastic upper stamping die, guide columns are fixedly arranged at four corners of the lower die base, a hydraulic cylinder is arranged at the top ends of the guide columns, an upper die base is fixedly arranged at the end of the hydraulic cylinder, and the upper die base is arranged on the outer sides of the guide columns in a sliding mode. The pressing block is arranged on the upper die base and used for abutting against the sheet metal part. The lower stamping die is fixedly mounted on the lower die base and is matched with the elastic upper stamping die to form the sheet metal part; according to the sheet metal stamping combined die, through the design of the elastic upper stamping die, pre-pressing is achieved through the pressure maintaining spring in the stamping process, pressure on a sheet metal part continues to be kept after stamping is finished, springback and deformation are effectively prevented, and the sheet metal stamping combined die is simple in structure, convenient to use and high in practicability. And the precision and the stability of the stamping part are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sheet metal stamping, and specifically relates to a sheet metal stamping combined die. Background Technique

[0002] As a pressure processing technology carried out at room temperature, the core of the stamping process lies in using a precisely designed die to apply an external force to the material under the drive of a press, causing it to separate or undergo plastic deformation, and then precisely forming into a part with the required shape. However, in actual operation, a common problem is that after the stamping process is completed, when the upper die completes the stamping action and starts to reset, the processed sheet metal part often undergoes a certain degree of elastic recovery deformation, which directly affects the final dimensional accuracy and overall processing quality of the sheet metal part, becoming a major challenge on the road to improving product quality.

[0003] To effectively alleviate this problem, the traditional approach is to let the upper die pause for a period of time after completing stamping, giving the sheet metal part enough time to gradually stabilize its shape, that is, the so-called "pressure holding and shaping" process. Although this method can improve the processing accuracy of the sheet metal part to a certain extent, its significant disadvantage is that it prolongs the production cycle and reduces production efficiency. Therefore, we propose a sheet metal stamping combined die. Content of the Utility Model

[0004] To solve the above technical problems, an embodiment of the present application provides a sheet metal stamping combined die, including a lower die base, guide columns are fixedly arranged at four corners of the lower die base, a hydraulic cylinder is arranged at the top of the guide column, an upper die base is fixedly arranged at the end of the hydraulic cylinder, the upper die base is slidably arranged outside the guide column, and further includes:

[0005] An elastic upper stamping die, arranged on the upper die base, for pressing the sheet metal part;

[0006] A lower stamping die, fixedly installed on the lower die base, cooperating with the elastic upper stamping die to form the sheet metal part;

[0007] Side plates, arranged on both sides of the elastic upper stamping die, and positioning parts for cooperating with the side plates are arranged on the lower stamping die.

[0008] In some embodiments, the elastic upper stamping die includes a fixed sleeve fixedly arranged at the bottom of the upper die base, a sliding block is slidably arranged in the fixed sleeve, one end of the sliding block located in the fixed sleeve is connected with a pressure holding spring, the other end of the pressure holding spring is fixedly connected with the fixed sleeve, and a punch is arranged at the other end of the sliding block.

[0009] In some embodiments, connecting plates are arranged on both sides of the punch, and the side plates are fixedly arranged at the ends of the connecting plates.

[0010] In some embodiments, the connecting plate is fixedly installed on the punch through bolts.

[0011] In some embodiments, the positioning member is a positioning rod provided on the lower stamping die. A plurality of positioning rods are provided and are respectively arranged at the four corners of the lower stamping die.

[0012] In some embodiments, the outer surface of the side plate is roughened.

[0013] In some embodiments, a roller is rotatably provided on the positioning rod. A friction layer is provided on the outer side of the roller, and the roller is rotatably provided on the positioning rod through a one-way bearing. When the punch drives the side plate to move downward, the side plate can drive the roller to rotate. When the side plate moves upward, a sliding friction is generated between the side plate and the roller.

[0014] In some embodiments, a moving groove is formed in the lower stamping die. The positioning rod is slidably arranged in the moving groove, and a support spring is fixedly provided at the bottom end of the positioning rod. The bottom end of the support spring is fixedly connected to the bottom of the moving groove.

[0015] In some embodiments, a through hole is formed in the lower stamping die. One end of the through hole is connected to the moving groove, and the other end of the through hole extends into the forming groove in the lower stamping die.

[0016] In some embodiments, the inner diameter of the through hole is smaller than the inner diameter of the moving groove.

[0017] The utility model has at least the following beneficial effects:

[0018] 1. Enhanced pressure holding function: Through the design of the elastic upper stamping die, the pre-pressure is realized by the pressure holding spring during the stamping process, and the pressure on the sheet metal part is continuously maintained after the stamping is completed, effectively preventing springback and deformation, and improving the accuracy and stability of the stamped parts;

[0019] 2. The positioning rod on the lower stamping die not only ensures the accurate positioning of the sheet metal part, but also provides additional stability during the stamping process through the cooperation of the side plate and the positioning rod, further improving the forming quality;

[0020] 3. Delayed pressure holding release: The friction design of the side plate and the positioning rod with optional rollers effectively delays the time for the pressure holding spring to drive the punch to move upward, making the pressure holding effect more lasting and conducive to the full deformation and curing of the material;

[0021] 4. Convenient demolding design: By pressing the positioning rod, using the air pressure change between the moving groove and the through hole, the formed part is assisted to be separated from the mold, simplifying the demolding process and improving the production efficiency;

[0022] 5. Flexible structure and easy to maintain: Each component such as the punch, side plate, positioning rod, etc. is connected by bolts or sliding connections, which is convenient for disassembly and replacement, reducing the maintenance cost. Brief Description of the Drawings

[0023] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0024] Figure 2 It is a front view schematic diagram of the structure of the present utility model;

[0025] Figure 3 It is a schematic diagram of the structure of the elastic upper stamping die of the present utility model;

[0026] Figure 4 It is a schematic diagram of the structure at the positioning rod in the second embodiment of the present utility model;

[0027] Figure 5 It is a schematic cross-sectional view of the lower stamping die of the present utility model;

[0028] Figure 6 For the present utility model Figure 5 Enlarged schematic diagram of the structure at A.

[0029] In the figure: 1 - lower die base; 2 - upper die base; 3 - elastic upper stamping die; 31 - fixed sleeve; 32 - sliding block; 33 - pressure-holding spring; 34 - punch; 4 - lower stamping die; 5 - side plate; 6 - positioning member; 61 - positioning rod; 62 - roller; 7 - connecting plate; 8 - moving groove; 9 - support spring; 10 - through hole. Detailed Embodiment

[0030] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0031] Embodiment 1

[0032] Please refer to Figures 1 - 3 , the present utility model provides a technical solution: A sheet metal stamping combined die, the structure of which includes a lower die base 1, a guide post, a hydraulic cylinder, an upper die base 2, an elastic upper stamping die 3, a lower stamping die 4, a side plate 5 and a positioning member 6, etc. The specific design is as follows:

[0033] The lower die base 1 and the guide post: Four guide posts are fixedly arranged on the lower die base 1 for supporting and guiding the up and down movement of the upper die base 2.

[0034] Hydraulic cylinder and upper die base 2: The hydraulic cylinder is set at the top of the guide column, and its end is fixedly connected to the upper die base 2, and the lifting and lowering of the upper die base 2 is achieved through hydraulic drive.

[0035] Elastic upper punching die 3: includes a fixed sleeve 31, a sliding block 32, a pressure-maintaining spring 33 and a punch 34. The sliding block 32 slides in the fixed sleeve 31 and is provided with pre-pressure by the pressure-maintaining spring 33. The punch 34 is arranged at the other end of the sliding block 32 to press the sheet metal part.

[0036] Lower punching die 4: fixedly mounted on the lower die base 1, and cooperates with the elastic upper punching die 3 to complete the forming of the sheet metal part.

[0037] Side plates 5 and positioning parts 6: The side plates 5 are arranged on both sides of the elastic upper stamping die 3 to enhance the stability during the stamping process. A positioning rod 61 is provided on the lower stamping die 4 as a positioning part 6, which is used in conjunction with the side plates 5 to achieve precise positioning and limiting of the sheet metal. During stamping, the punch 34 moves downward to drive the side plates 5 to move downward. At this time, friction is generated between the side plates 5 and the positioning rods 61. When the stamping is completed, the punch 34 drives the side plates 5 to move upward. At this time, there is friction between the side plates 5 and the positioning rods 61. Therefore, the upper die base 2 moves first, and the punch 34 still abuts against the sheet metal under the action of the pressure-maintaining spring 33 to maintain pressure. When the upper die base 2 continues to move upward, the upper die base 2 drives the punch 34 to move, so that the side plates 5 are staggered with the positioning rods 61, and the punch 34 is reset.

[0038] Furthermore, connecting plates 7 are provided on both sides of the punch 34, and the side plates 5 are fixedly mounted on the ends of the connecting plates 7 for easy installation and replacement. The connecting plates 7 are fixedly mounted on the punch 34 by bolts, and the structure is compact and stable.

[0039] The outer surface of the side plate 5 is roughened to increase the friction between the side plate 5 and the positioning rod 61 .

[0040] Example 2

[0041] See also Figure 4 The main structure of the second embodiment is the same as that of the first embodiment, except that a roller 62 is rotatably provided on the positioning rod 61, a friction layer is provided on the outside of the roller 62, and the roller 62 is rotatably provided on the positioning rod 61 through a one-way bearing. When the punch 34 drives the side plate 5 to move downward, the side plate 5 can drive the roller 62 to rotate. When the side plate 5 moves upward, sliding friction is generated between the side plate 5 and the roller 62, so that when the punch 34 moves downward, the side plate 5 can move downward smoothly. After the stamping is completed, when the upper die base 2 drives the punch 34 to move upward, friction is generated between the side plate 5 and the roller 62.

[0042] Example 3

[0043] See also Figures 5 - 6, on the basis of Embodiment 2, in Embodiment 3, the positioning rod 61 is set to be movable. A moving groove 8 is formed in the lower stamping die 4. The positioning rod 61 is slidably arranged in the moving groove 8, and a support spring 9 is fixedly arranged at the bottom end of the positioning rod 61. The bottom end of the support spring 9 is fixedly connected to the bottom of the moving groove 8. In this way, when the upper die base 2 drives the punch 34 and the side plate 5 to move upward, the positioning rod 61 has a certain moving distance, which can extend the pressure holding time and improve the forming effect of the sheet metal part.

[0044] A through hole 10 is formed in the lower stamping die 4. One end of the through hole 10 is connected to the moving groove 8, and the other end of the through hole 10 extends into the forming groove in the lower stamping die 4. The inner diameter of the through hole 10 is smaller than the inner diameter of the moving groove 8. By pressing the positioning rod 61, using the air pressure change between the moving groove 8 and the through hole 10, the formed part is assisted to be separated from the mold, simplifying the demolding process and improving the production efficiency.

[0045] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0046] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A combined sheet metal stamping die, comprising a lower die base (1), guide pillars are fixedly arranged at four corners of the lower die base (1), a hydraulic cylinder is arranged at the top of the guide pillar, and an upper die base (2) is fixedly arranged at the end of the hydraulic cylinder. The upper die base (2) is slidably arranged outside the guide pillar, and it is characterized in that: It further includes: An elastic upper stamping die (3), arranged on the upper die base (2) for pressing the sheet metal part; A lower stamping die (4), fixedly installed on the lower die base (1), cooperating with the elastic upper stamping die (3) to form the sheet metal part; Side plates (5), arranged on both sides of the elastic upper stamping die (3), and positioning members (6) cooperating with the side plates (5) are arranged on the lower stamping die (4).

2. The sheet metal stamping combined die according to claim 1, wherein: The elastic upper stamping die (3) includes a fixed sleeve (31) fixedly arranged at the bottom of the upper die base (2). A sliding block (32) is slidably arranged in the fixed sleeve (31). One end of the sliding block (32) located in the fixed sleeve (31) is connected with a pressure-holding spring (33). The other end of the pressure-holding spring (33) is fixedly connected with the fixed sleeve (31). A punch (34) is arranged at the other end of the sliding block (32).

3. The sheet metal stamping combined die according to claim 2, characterized in that: Connecting plates (7) are arranged on both sides of the punch (34). The side plates (5) are fixedly arranged at the ends of the connecting plates (7).

4. The sheet metal stamping combination die according to claim 3, wherein: The connecting plates (7) are fixedly installed on the punch (34) by bolts.

5. The sheet metal stamping combined die according to claim 4, wherein: The positioning member (6) is a positioning rod (61) arranged on the lower stamping die (4). A plurality of positioning rods (61) are arranged and are respectively arranged at the four corners of the lower stamping die (4).

6. The sheet metal stamping combined die according to claim 5, wherein: The outer surface of the side plate (5) is roughened.

7. The sheet metal stamping combined die according to claim 6, wherein: A roller (62) is rotatably arranged on the positioning rod (61). A friction layer is arranged on the outer side of the roller (62). And the roller (62) is rotatably arranged on the positioning rod (61) through a one-way bearing. When the punch (34) drives the side plate (5) to move downward, the side plate (5) can drive the roller (62) to rotate. When the side plate (5) moves upward, sliding friction is generated between the side plate (5) and the roller (62).

8. The sheet metal stamping combined die according to claim 7, wherein: A moving groove (8) is formed in the lower stamping die (4). The positioning rod (61) is slidably arranged in the moving groove (8). And a support spring (9) is fixedly arranged at the bottom end of the positioning rod (61). The bottom end of the support spring (9) is fixedly connected with the bottom of the moving groove (8).

9. The sheet metal stamping combined die according to claim 8, wherein: A through hole (10) is formed in the lower stamping die (4). One end of the through hole (10) is connected with the moving groove (8), and the other end of the through hole (10) extends to the forming groove in the lower stamping die (4).

10. The sheet metal stamping combination die according to claim 9, wherein: The inner diameter of the through hole (10) is smaller than the inner diameter of the moving groove (8).

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