A punch rod structure of a press die

Abstract

The utility model discloses a kind of knock rod structures of punch die, belong to punch die technical field, a kind of knock rod structure of punch die, including upper die holder and lower die holder, the bottom of the upper die holder is fixedly connected with backing plate, the bottom of the backing plate is fixedly connected with male die, the top of the upper die holder is fixedly connected with guide sleeve, knock material mechanism is provided in the guide sleeve, the bottom of the backing plate is fixedly connected with guide pillar in four corner positions, guide pillar is slidably covered with pressure plate, and pressure plate is slidably covered in the outer periphery of male die, it can use upper reset compression spring cooperation pressure plate, workpiece can be assisted positioning, so that knockout block ejects workpiece when avoiding phenomenon such as workpiece being knocked and deforming, while additionally reset compression spring cooperation ejector rod, recess die on lower die holder and workpiece can be quickly demoulded, reduce the scrap rate of workpiece, greatly improve the effect of overall use and production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of stamping mold technology, and more specifically, to a stamping die rod structure. Background Technology

[0002] In the design and use of stamping dies, the ejector pin structure is a key component for demolding and ejecting workpieces, and its performance directly affects production efficiency and product quality.

[0003] Based on the above, the inventors have discovered that in the demolding process of stamping dies, the traditional ejector structure usually directly ejects the workpiece to achieve demolding. However, the workpiece usually lacks an auxiliary positioning structure, which may lead to uneven ejection force causing the workpiece to be ejected or deformed, resulting in poor performance, increased scrap rate, reduced production efficiency, and certain safety hazards. Therefore, in view of this, the inventors have researched and improved the existing structure to provide an ejector structure for stamping dies, aiming to achieve a more practical purpose. Utility Model Content

[0004] 1. Technical problems to be solved

[0005] To address the problems existing in the prior art, the purpose of this utility model is to provide a punching rod structure for a stamping die. It can use an upper reset spring in conjunction with a pressure plate to assist in positioning the workpiece, so that the workpiece is not ejected or deformed when the ejector block ejects the workpiece. At the same time, the addition of a lower reset spring in conjunction with an ejector rod enables the die on the lower die base to be quickly demolded from the workpiece, reducing the scrap rate of the workpiece and greatly improving the overall performance and production efficiency.

[0006] 2. Technical Solution

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] A punching structure for a stamping die includes an upper die base and a lower die base. A pad is fixedly connected to the bottom of the upper die base, and a punch is fixedly connected to the bottom of the pad. A guide sleeve is fixedly connected to the top of the upper die base, and a punching mechanism is provided inside the guide sleeve. Guide posts are fixedly connected to the four corners of the bottom of the pad. A pressure plate is slidably sleeved on the outer periphery of the guide posts, and the pressure plate is slidably sleeved on the outer periphery of the punch. A plurality of upper return springs are provided between the pad and the pressure plate. A mounting groove is opened on the top of the lower die base, and a lower return spring is provided in the mounting groove. A push rod is fixedly connected to the top of the lower return spring. A die is fixedly connected to the top of the lower die base, and the top end of the push rod extends to the top of the die.

[0009] Furthermore, the feeding mechanism includes a punch rod slidably connected within the guide sleeve, a return spring sleeved on the top outer periphery of the punch rod, and the bottom end of the punch rod extending into the punch and fixedly connected to an ejector block.

[0010] Furthermore, a limiting groove is formed at the bottom center of the punch, and the ejector block is slidably connected within the limiting groove.

[0011] Furthermore, a positioning groove is provided on the top of the guide sleeve, and the bottom and top ends of the reset spring are fixedly connected to the inner bottom wall of the positioning groove and the top end of the striking rod on the guide sleeve, respectively.

[0012] Furthermore, the upper mold base and the pad are provided with a number of positioning grooves, the top end of the upper reset spring is embedded in the positioning groove, and the bottom end of the upper reset spring is fixed to the top of the pressure plate.

[0013] Furthermore, a guide hole is provided on the top of the die corresponding to the position of the guide post.

[0014] Furthermore, hydraulic cylinders are fixedly installed at the four corners of the bottom of the upper mold base and at the top of the lower mold base.

[0015] 3. Beneficial Effects

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] This solution utilizes the combined use of an upper reset spring and a pressure plate. When the upper die holder moves the punch upward, the elastic force generated by the deformation of the upper reset spring presses against the pressure plate, allowing the pressure plate to limit the workpiece and achieve auxiliary positioning. Meanwhile, the ejector rod, under the elastic force generated by the deformed reset spring, pushes the ejector block out of the limiting groove, separating the workpiece from the punch. This method avoids uneven ejection force from the ejector block, which could cause the workpiece to be ejected or deformed. Additionally, a lower reset spring is added in conjunction with the ejector rod. After the external pressure is removed from the top of the workpiece, the rebound force generated by the deformed lower reset spring pushes the ejector rod upward, allowing for rapid separation of the die on the lower die holder from the workpiece. The entire operation is simple and convenient, making workpiece demolding easier, reducing the scrap rate, and significantly improving overall performance and production efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the disassembled structure of this utility model;

[0020] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0021] Figure 4 This is a partial structural schematic diagram of the present invention.

[0022] Explanation of the labels in the diagram:

[0023] 1. Upper mold base; 101. Backing plate;

[0024] 2. Lower mold base;

[0025] 3. Punch; 301. Limiting groove;

[0026] 4. Guide sleeve;

[0027] 5. Feeding mechanism; 501. Feeding rod; 502. Return spring; 503. Ejector block;

[0028] 6. Guide post;

[0029] 7. Pressure plate;

[0030] 8. Upper reset spring;

[0031] 9. Mounting slot;

[0032] 10. Lower reset spring;

[0033] 11. Top rod;

[0034] 12. Die cavity; 1201. Guide hole;

[0035] 13. Hydraulic cylinder. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0037] Example:

[0038] Please see Figures 1-4A punching structure for a stamping die includes an upper die base 1 and a lower die base 2. A pad 101 is fixedly connected to the bottom of the upper die base 1, and a punch 3 is fixedly connected to the bottom of the pad 101. A guide sleeve 4 is fixedly connected to the top of the upper die base 1, and a punching mechanism 5 is provided inside the guide sleeve 4. Guide posts 6 are fixedly connected to the four corners of the bottom of the pad 101. A pressure plate 7 is slidably sleeved on the outer periphery of the guide post 6, and the pressure plate 7 is slidably sleeved on the outer periphery of the punch 3. Several upper reset springs 8 are provided between the pad 101 and the pressure plate 7. An installation groove 9 is opened on the top of the lower die base 2, and a lower reset spring 10 is provided in the installation groove 9. A push rod 11 is fixedly connected to the top of the lower reset spring 10. A die 12 is fixedly connected to the top of the lower die base 2, and the top end of the push rod 11 extends to the top of the die 12.

[0039] See Figure 3 The feeding mechanism 5 includes a punch 501 slidably connected to the guide sleeve 4. A return spring 502 is sleeved on the top outer periphery of the punch 501. The bottom end of the punch 501 extends into the punch 3 and is fixedly connected to an ejector block 503.

[0040] See Figure 3 A limiting groove 301 is provided at the bottom center of the punch 3, and the ejector block 503 is slidably connected in the limiting groove 301.

[0041] See Figure 3 The top of the guide sleeve 4 is provided with a positioning groove, and the bottom and top ends of the reset spring 502 are fixedly connected to the bottom wall of the positioning groove on the guide sleeve 4 and the top end of the hitting rod 501, respectively.

[0042] See Figure 3 The upper mold base 1 and the pad 101 are provided with several positioning grooves. The top end of the upper reset spring 8 is embedded in the positioning groove, and the bottom end of the upper reset spring 8 is fixed to the top of the pressure plate 7.

[0043] See Figure 2 A guide hole 1201 is provided on the top of the die 12 and at the position corresponding to the guide post 6.

[0044] See Figure 1 Hydraulic cylinders 13 are fixedly installed at the four bottom corners of the upper mold base 1 and the top of the lower mold base 2.

[0045] In use: When demolding is required, the hydraulic cylinder 13 is activated, causing the upper mold base 1 to move the punch 3 upward. At this time, the upper return spring 8, which is under compression, returns and generates a rebound force that presses the pressure plate 7, allowing the pressure plate 7 to limit the workpiece and achieve auxiliary positioning of the workpiece. Meanwhile, the push rod 501, under the action of the rebound force generated by the deformed return spring 502, pushes the ejector block 503 out of the limiting groove 301, causing the workpiece to gradually separate from the punch 3. When the workpiece is completely separated from the punch 3, the upper return spring 8 and the return spring 502 are fully reset, and the external pressure on the top of the workpiece is removed. The added pressure prevents uneven ejection force from the ejector block 503, which could cause the workpiece to be ejected or deformed. Additionally, a lower reset spring 10, working in conjunction with the ejector rod 11, pushes the ejector rod 11 upwards after the external pressure is released from the top of the workpiece, due to the deformation and rebound force generated by the lower reset spring 10 in its compressed state. This pushes the workpiece upwards, gradually separating it from the die 12 on the lower mold base 2. The entire operation is simple and convenient, making workpiece demolding easier, reducing the scrap rate, and significantly improving overall performance and production efficiency.

[0046] Finally, it should be noted that in the description of this utility model, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing 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.

[0047] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0048] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A stamping die forming structure, comprising an upper die holder (1) and a lower die holder (2), characterized in that: The bottom of the upper mold base (1) is fixedly connected to a pad (101), the bottom of the pad (101) is fixedly connected to a punch (3), the top of the upper mold base (1) is fixedly connected to a guide sleeve (4), a feeding mechanism (5) is provided in the guide sleeve (4), the bottom four corners of the pad (101) are fixedly connected to guide posts (6), the outer periphery of the guide post (6) is slidably fitted with a pressure plate (7), and the pressure plate (7) is slidably fitted on the outer periphery of the punch (3), a number of upper reset springs (8) are provided between the pad (101) and the pressure plate (7), the top of the lower mold base (2) is provided with an installation groove (9), the installation groove (9) is provided with a lower reset spring (10), the top of the lower reset spring (10) is fixedly connected to a push rod (11), the top of the lower mold base (2) is fixedly connected to a die (12), and the top end of the push rod (11) extends to the top of the die (12).

2. The pin-forming structure of a stamping die according to claim 1, characterized in that: The feeding mechanism (5) includes a punch (501) slidably connected in the guide sleeve (4), a return spring (502) is sleeved on the top outer periphery of the punch (501), and the bottom end of the punch (501) extends into the punch (3) and is fixedly connected to an ejector block (503).

3. The pin-forming structure of a stamping die according to claim 2, characterized in that: A limiting groove (301) is provided at the bottom center of the punch (3), and the ejector block (503) is slidably connected in the limiting groove (301).

4. The pin-forming structure of a stamping die according to claim 2, characterized in that: The top of the guide sleeve (4) is provided with a positioning groove, and the bottom and top ends of the reset spring (502) are fixedly connected to the bottom wall of the positioning groove on the guide sleeve (4) and the top end of the hitting rod (501), respectively.

5. The pin-forming structure of a stamping die according to claim 1, characterized in that: The upper mold base (1) and the pad (101) are provided with a number of positioning grooves. The top end of the upper reset spring (8) is embedded in the positioning groove, and the bottom end of the upper reset spring (8) is fixed to the top of the pressure plate (7).

6. The pin-forming structure of a stamping die according to claim 1, characterized in that: A guide hole (1201) is provided on the top of the die (12) and at the position corresponding to the guide post (6).

7. The pin-forming structure of a stamping die according to claim 1, characterized in that: Hydraulic cylinders (13) are fixedly installed between the four bottom corners of the upper mold base (1) and the top of the lower mold base (2).

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