Anti-rotation positioning movable stamping die with wide applicability

Abstract

The utility model belongs to the technical field of dies, and particularly relates to a wide-applicability anti-rotation positioning movable stamping die which comprises a die shell, a rear seat arranged at the upper end of the die shell, a limiting hole formed in the inner side wall of the lower end of the die shell and used for installing a positioning pin, a protruding block arranged at the top end of the rear seat, a spring arranged on the rear seat in a sleeved mode, and an ejector pin and a die body connected to the bottom of the rear seat. The ejector pin is arranged in the die body, the die body is sleeved with the die shell, a thickening part is arranged at the lower end of the die body, the top face of the thickening part makes contact with the bottom face of the die shell, a movable groove is formed in the position, corresponding to the limiting hole, of the side wall of the die body, a first die core and a second die core are arranged at the bottom of the die body from bottom to top and arranged on the ejector pin in a sleeved mode, and a workpiece to be machined is placed in the second die core. Through the arrangement of the components, not only is the diameter of the mold core increased, but also the wrapping force of the mold shell is not changed, and accurate positioning of special-shaped products and polygonal products is realized.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology, specifically relating to a widely applicable anti-rotation positioning movable punch die. Background Technology

[0002] The use of cold heading technology to process products with large heads has always faced many challenges in practical applications.

[0003] Firstly, the limited outer diameter of the stamping die restricts the amount of clamping force it can provide for the tungsten carbide die core. Tungsten carbide die cores, as crucial components in molds, are widely used in various mold manufacturing processes due to their high hardness and wear resistance. However, the insufficient clamping force of existing mold shells on tungsten carbide die cores severely limits their usability. Many products with larger heads cannot be produced because the required tungsten carbide die core dimensions exceed the capacity of current moving dies. This not only limits product variety but also negatively impacts the company's order fulfillment capacity, hindering business expansion.

[0004] Secondly, for processing polygonal or irregularly shaped products, traditional movable dies struggle to achieve precise positioning. During cold heading, inaccurate product positioning can easily lead to dimensional deviations and irregular shapes in various parts of the product, severely impacting the forming quality. These quality defects not only increase the defect rate and production costs but may also prevent products from meeting customer requirements, damaging the company's market reputation. Utility Model Content

[0005] The purpose of this utility model is to provide a widely applicable anti-rotation positioning movable punch die, which aims to solve the technical problems in the prior art where the outer diameter of the movable punch die limits the use of tungsten steel die cores and the positioning of polygonal or irregular products is inaccurate.

[0006] To achieve the above objectives, this utility model provides a widely applicable anti-rotation positioning movable punch, characterized in that: it includes a die shell, which is a hollow cylindrical structure with a limiting hole on the inner side wall at the lower end, and a rear seat on the upper part of the die shell; a protrusion is provided at the top of the rear seat, a spring is sleeved on the rear seat, and an ejector pin and a die body are provided at the bottom; the ejector pin is located in the die body and is fixedly connected to the rear seat, with a needle tip at the top having a diameter larger than the ejector pin; the die body is located inside the die shell, with a reserved hole at the top, a movable groove at the corresponding position of the side wall and the limiting hole, and a thickened part at the lower end, the top surface of the thickened part contacting the bottom surface of the die shell; a positioning pin is provided in the movable groove, with both ends of the positioning pin located in the side wall of the die shell, and the middle part located in the die body; a first die core and a second die core are sequentially fitted at the bottom of the die body from bottom to top.

[0007] Preferably, the limiting hole penetrates vertically through the inner wall of the mold shell, and the maximum distance from its center to the inner wall is equal to the radius, so that both ends of the positioning pin are in the mold shell, and half of the middle part is in the mold shell and half is in the mold body.

[0008] Preferably, the diameter of the protrusion is the same as the diameter of the central hole in the mold shell and is larger than the diameter of the rear seat.

[0009] Preferably, the spring is sleeved on the rear seat to keep the mold in its original position and prevent the mold body from rotating, and is restricted to the rear seat by the mold body.

[0010] Preferably, the height of the movable groove is consistent with the height at which the mold shell is lifted relative to the mold body, and the width of the movable groove is consistent with the radius of the positioning pin. The movable groove is used to provide space for the mold shell to drive the positioning pin to move up and down, and to limit the direction and range of movement of the mold shell and the positioning pin.

[0011] Preferably, by coordinating the lengths of the mold shell and the mold body, and by increasing the bottom diameter of the mold body to form a thickened section, the diameter of the second mold core is increased while ensuring the enveloping force of the mold body on the second mold core.

[0012] Preferably, in the initial state, the spring is in a stretched state, so that the positioning pin is located at the top of the movable groove, and the top surface of the mold body is separated from the bottom surface of the rear seat.

[0013] Preferably, the first mold core is fitted at the bottom of the mold body and onto the ejector pin; the second mold core is fitted at the bottom of the mold body and located above the first mold core, and the workpiece to be processed is placed in the second mold core.

[0014] The above-mentioned technical solutions in the widely applicable anti-rotation positioning movable die provided by this utility model embodiment have at least one of the following technical effects:

[0015] This utility model discloses a widely applicable anti-rotation positioning movable punch. Through the cooperation of the die shell and die body, and the split design of the die core, the diameter of the die core can be increased while the force exerted by the die shell remains unchanged. This breaks through the constraint on the size of the die core caused by the outer diameter limitation of the die shell, and improves the applicability of the die. At the same time, the split design of the die core means that the cold forging force on the first die core is smaller, which can reduce the amount of tungsten steel used and reduce costs. In addition, when different products need to be processed, only the second die core needs to be replaced, reducing the cost of a single die core. Furthermore, the second die core is subjected to a larger cold forging force, so the first die core is not affected even if it is damaged, further reducing the cost of a single die core.

[0016] This utility model discloses a widely applicable anti-rotation positioning movable die. Through the cooperation and restraint of the movable groove on the die body, the upper limit hole on the die shell, and the positioning pin, the movement stroke of the die body can be precisely limited and rotation prevented. This precise positioning method enables accurate positioning of irregularly shaped and polygonal products, greatly improving product molding quality and reducing the defect rate. Simultaneously, with the cooperation of the spring, the protrusion, and the die body, the spring applies pressure to the die body, keeping the die in a stable return state. The auxiliary positioning pin prevents die body rotation, further ensuring the stability of the die during operation, extending its service life, ensuring the continuity and reliability of the cold heading process, and thus improving production efficiency. Attached Figure Description

[0017] 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.

[0018] Figure 1 A side view of a widely applicable anti-rotation positioning movable punch die provided for an embodiment of this utility model.

[0019] Figure 2 for Figure 1 Sectional view at point AA.

[0020] Figure 3 A partial view of the die body in a widely applicable anti-rotation positioning movable die provided in this embodiment of the utility model.

[0021] Figure 4 A perspective view of the workpiece to be processed for a widely applicable anti-rotation positioning movable punch die provided in this embodiment of the utility model.

[0022] The following are the labeling elements in the figure:

[0023] 10—Mold shell; 11—Limiting hole; 20—Rear seat; 21—Protrusion; 30—Spring; 40—Ejector pin

[0024] 41—Needle tip; 50—Mold body; 51—Modular groove; 52—Thickened part; 60—Positioning pin.

[0025] 70—First mold core; 80—Second mold core; 90—Work to be processed. Detailed Implementation

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] In one embodiment of this utility model, such as Figure 1-3 As shown, a widely applicable anti-rotation positioning movable punch die is provided, including a die shell 10, a rear seat 20, a spring 30, an ejector pin 40, a die body 50, a positioning pin 60, a first die core 70, a second die core 80, and a workpiece to be processed 90.

[0031] The mold shell 10 is a hollow cylindrical structure. The mold shell 10 serves to fix and install other components inside the mold and to keep the other components concentric.

[0032] The upper part of the mold shell 10 is provided with a rear seat 20 to bear the recoil force of the ejector pin 40 and limit the position of the ejector pin 40. A spring 30 is sleeved on the rear seat 20 to keep the mold in the return state and prevent the mold body 50 from rotating. The spring 30 is limited on the rear seat 20 by the cooperation between the rear seat 20 and the mold body 50.

[0033] The bottom of the rear seat 20 is provided with an ejector pin 40 and a mold body 50. The ejector pin 40 is located in the mold body 50 and is fixedly connected to the rear seat 20. The mold body 50 is located in the mold shell 10. When the ejector pin 40 applies cold forging force to the workpiece 90, the spring 30 is compressed and the top surface of the mold body 50 contacts the bottom surface of the rear seat 20.

[0034] A positioning pin 60 is provided between the mold body 50 and the mold shell 10. The two ends of the positioning pin 60 are located in the side wall of the mold shell 10, and half of the middle part is located in the mold shell 10 and half in the mold body 50. When the mold shell 10 rises, the spring 30 applies elastic force to the mold body 50. When the mold shell 10 rises within a certain height, the mold body 50 maintains a constant height. After the mold shell 10 rises beyond the set height, the mold body 50 rises simultaneously with the mold shell 10 under the limiting action of the positioning pin 60.

[0035] The top of the mold body 50 is provided with a reserved hole, and the bottom is provided with a first mold core 70 and a second mold core 80 sleeved on the ejector pin 40 from bottom to top. The workpiece 90 to be processed is placed in the second mold core 70.

[0036] like Figure 4 As shown, the workpiece 90 to be processed is a product with a large head, or a polygonal or irregularly shaped product.

[0037] The inner wall of the lower end of the mold shell 10 is provided with a limiting hole 11 for installing the positioning pin 60. The limiting hole 11 is set perpendicularly to the mold shell 10 and penetrates the inner wall of the mold shell 10. The maximum distance from the midpoint of the limiting hole 11 to the inner wall of the mold shell 10 is the same as the radius of the limiting hole 11. This makes half of the middle part of the positioning pin 60 in the mold shell 10 and the other half in the mold body 50, preventing the mold body 50 from shifting or shaking, thereby achieving precise control of the range of motion of the mold body 50.

[0038] The rear seat 20 has a protrusion 21 at its top for limiting the position of the rear seat 20. The diameter of the protrusion 21 is the same as the diameter of the central hole of the mold shell 10 and is larger than the diameter of the rear seat 20, so that the rear seat 20 can be stably installed in the mold shell 10 and can provide room for the contraction and expansion of the spring 30. At the same time, the protrusion 21 can also cooperate with the mold body 50 to limit the range of motion of the spring 30.

[0039] The top of the ejector pin 40 is provided with a needle head 41 with a diameter larger than that of the ejector pin 40. When the ejector pin 40 applies cold forging force to the workpiece 90, the needle head 41 is located in the reserved hole at the top of the mold body 50.

[0040] The side wall of the mold body 50 is provided with a movable groove 51 corresponding to the limiting hole 11. The height of the movable groove 51 is the same as the height at which the mold shell 10 is raised relative to the mold body 50, and the width of the movable groove 51 is the same as the radius of the positioning pin 60. The movable groove 51 provides space for the mold shell 10 to move the positioning pin 60 up and down and restricts the direction and range of movement of the mold shell 10 and the positioning pin 60.

[0041] The lower end of the mold body 50 is provided with a thickened part 52. The top surface of the thickened part 52 is in contact with the bottom surface of the mold shell 10. By coordinating the lengths of the mold shell 10 and the mold body 50, and by increasing the bottom diameter of the mold body 50 to form the thickened part 52, the diameter of the second mold core 80 is increased while ensuring the enveloping force of the mold body 50 on the second mold core 80. This breaks through the constraint on the size of the mold core due to the limitation of the outer diameter of the mold shell and improves the applicability of the mold.

[0042] The working principle of this utility model is as follows: A widely applicable anti-rotation positioning movable punch die is used in which the spring 30 is sleeved on the rear seat 20, the ejector pin 40 is fixedly connected to the rear seat 20, the rear seat 20 is then fixedly installed in the mold shell 10, the first mold core 70 and the second mold core 80 are sequentially fixedly connected to the mold body 50, the mold body 50 is then inserted into the mold shell 10, and the first mold core 70 and the second mold core 80 are sleeved on the ejector pin 40. Then the positioning pin 60 is inserted into the limiting hole 11 and fixedly connected to the mold shell 10. In the initial state, the spring 30 is in a stretched state, the positioning pin 60 is located at the top of the movable groove 51, the top surface of the mold body 50 is separated from the bottom surface of the rear seat 20, the workpiece 90 is placed in the master mold, and the drive mechanism drives the mold shell 10 to move down. During the downward movement, the second mold core 80 first contacts the workpiece 90 to accurately position it. At the same time, under the limiting action of the positioning pin 60, the mold body 50 is prevented from rotating. As the mold shell 10 continues to move down, the spring 30 is compressed by the rear seat 20, and the ejector pin 40 applies cold forging force to the workpiece 90 to complete the processing of the workpiece 90.

[0043] 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 widely applicable anti-rotation positioning movable die, characterized in that, include: The mold shell (10) is a hollow cylindrical structure with a limiting hole (11) on the inner side wall at the lower end. The upper part of the mold shell (10) is provided with a rear seat (20). The top of the rear seat (20) is provided with a protrusion (21), and a spring (30) is sleeved on the rear seat (20). The bottom is provided with an ejector pin (40) and a mold body (50). The ejector pin (40) is located in the mold body (50) and is fixedly connected to the rear seat (20). The top of the ejector pin (40) is provided with a needle tip (41) with a diameter larger than that of the ejector pin (40). The mold body (50) is provided with Inside the mold shell (10), a pre-drilled hole is provided at the top, and a movable groove (51) is provided at the corresponding position of the side wall and the limiting hole (11). A thickened part (52) is provided at the bottom, and the top surface of the thickened part (52) is in contact with the bottom surface of the mold shell (10). A positioning pin (60) is provided in the movable groove (51). The two ends of the positioning pin (60) are located in the side wall of the mold shell (10), and the middle part is located in the mold body (50). The bottom of the mold body (50) is fitted with the first mold core (70) and the second mold core (80) from bottom to top.

2. The universal anti-rotation indexing positive action die of claim 1 wherein, The limiting hole (11) penetrates vertically through the inner wall of the mold shell (10), and the maximum distance from its center to the inner wall is equal to the radius, so that the two ends of the positioning pin (60) are in the mold shell (10), and half of the middle part is in the mold shell (10) and half is in the mold body (50).

3. The universal anti-rotation indexing positive action die of claim 1 wherein, The diameter of the protrusion (21) is the same as the diameter of the central hole of the mold shell (10) and is larger than the diameter of the rear seat (20).

4. The universal anti-rotation indexing positive action die of claim 1 wherein, The spring (30) is sleeved on the rear seat (20) to keep the mold in its original position and prevent the mold body (50) from rotating, and is restricted to the rear seat (20) with the cooperation of the mold body (50).

5. The universal anti-rotation indexing positive action die of claim 1 wherein, The height of the movable groove (51) is consistent with the height at which the mold shell (10) is raised relative to the mold body (50), and the width of the movable groove (51) is consistent with the radius of the positioning pin (60). The movable groove (51) is used to provide space for the mold shell (10) to drive the positioning pin (60) to move up and down, and to limit the direction and range of movement of the mold shell (10) and the positioning pin (60).

6. The universal anti-rotation indexing positive action die of claim 1 wherein, By coordinating the lengths of the mold shell (10) and the mold body (50), and by increasing the bottom diameter of the mold body (50) to form a thickened part (52), the diameter of the second mold core (80) is increased while ensuring the enveloping force of the mold body (50) on the second mold core (80).

7. The universal anti-rotation indexing positive action die of claim 1 wherein, In the initial state, the spring (30) is in a stretched state, so that the positioning pin (60) is located at the top of the movable groove (51), and the top surface of the mold body (50) is separated from the bottom surface of the rear seat (20).

8. The universal anti-rotation indexing positive action die of claim 1 wherein, The first mold core (70) is fitted at the bottom of the mold body (50) and on the ejector pin (40); the second mold core (80) is fitted at the bottom of the mold body (50) and located above the first mold core (70), and the workpiece (90) to be processed is placed in the second mold core (80).

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