Reshaping die for circular product

Abstract

The utility model relates to the technical field of forming dies, and discloses a round product shaping die which comprises a lower die base and an upper die base, a guide plate and a fixing base are arranged on the lower die base, a plurality of radial guide grooves are formed in the guide plate, male dies in one-to-one correspondence with the radial guide grooves are arranged on the upper surface of the guide plate, and the fixing base is arranged on the upper die base. Each male die is provided with a guide block sliding in the radial guide groove, the upper die base is provided with a core rod driving the male dies to expand outwards, the fixing base is located on the outer ring of the guide plate, guide bases corresponding to the male dies one to one are arranged on the upper surface of the fixing base, and a sliding block is arranged between each guide base and the corresponding male die. The sliding blocks are matched with the inclined faces of the guide bases, the upper die base is provided with jacking columns for driving the sliding blocks to contract downwards and towards the guide plates, and the sliding blocks are matched with the male die to apply pressure to a product to be shaped. The round product shaping die has enough space for placing and taking the product, so that the quality of the product can be improved in a short time, and the size of the rectified product can reach the standard and is stable.

Description

Technical Field

[0001] This utility model relates to the field of molding die technology, and in particular to a round product shaping die. Background Technology

[0002] After stretch forming, round cap products often experience a loss of roundness at the opening. This loss becomes more pronounced as the diameter of the product increases. Factors contributing to this loss of roundness include raw material thickness, flange clearance, and product thinning rate. Additionally, internal stress after forming causes the product to spring back when the mold is opened, which is another significant factor contributing to the loss of roundness at the opening.

[0003] In the existing forming mold structure, when the upper mold base moves downward, the mandrel moves downward into the punch under the action of the upper mold base. The punch (multi-lobed) expands outward evenly along the limiting direction. As the punch expands outward, it contacts the product and cooperates with the die to round the product. When the mold opens, the upper mold base begins to move upward, and the mandrel moves upward with the upper mold base. The mandrel and the punch gradually separate, and the punch loses its driving force. Meanwhile, the nitrogen spring, which is in a compressed state when the mold closes, begins to provide top pressure to the punch, causing the punch to retract evenly and return to its initial state.

[0004] However, if the diameter of an out-of-round product varies greatly and is uneven, exceeding the tolerance range required by the product, it will result in the product not being able to be placed initially, making it difficult to remove after shaping, and the dimensions after rectification are also difficult to guarantee. Utility Model Content

[0005] Based on the above problems, the purpose of this utility model is to provide a round product shaping mold to ensure the shaping effect of round products and improve the convenience of placing and removing parts in the mold.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A round product forming mold includes a lower mold base and an upper mold base. The lower mold base is provided with a guide plate and a fixed seat. The guide plate has several radial guide grooves. The upper surface of the guide plate is provided with a punch corresponding to each radial guide groove. Each punch is provided with a guide block that slides within the radial guide groove. The upper mold base is provided with a mandrel that drives each punch to expand outward. The fixed seat is located on the outer ring of the guide plate. The upper surface of the fixed seat is provided with a guide seat corresponding to each punch. A slider is provided between each guide seat and the punch. The slider and the guide seat are inclined and engaged. The upper mold base is provided with a top post that drives each slider downward and retracts towards the guide plate. The slider and the punch cooperate to apply pressure to the product to be formed.

[0008] As an alternative, a first return spring is installed on the fixed base facing the punch, and the first return spring is used to apply an inward contraction force to each punch.

[0009] As an alternative, a positioning block is provided on the guide block, and the first return spring abuts against the positioning block.

[0010] As an alternative, a pressure plate is provided on the lower surface of the guide block, which is used to prevent the guide block from dislodging from the radial guide groove.

[0011] As an alternative, a second return spring is installed on the mounting base facing the slider, which is used to apply an upward force to each slider.

[0012] As an optional solution, the slider and the guide seat are also connected by a dovetail joint.

[0013] As an alternative, six punches, guide seats, sliders, and ejector pins are provided, and the mandrel is a hexagonal prism shape that mates with the inclined surfaces of the six punches.

[0014] As an alternative, the upper mold base and the lower mold base are connected by guide pillars and guide sleeves.

[0015] As an alternative, limit posts are provided on both the upper and lower mold bases, and the limit posts of the upper mold base abut against the limit posts of the lower mold base when the mold is closed.

[0016] As an alternative, a lower support plate is provided below the lower mold base, and a pad is provided between the lower support plate and the lower mold base.

[0017] The beneficial effects of this utility model are:

[0018] This round product forming mold changes the original forming structure of the die and punch. It features a specially designed punch and slider, which allows the punch to retract inward and the slider to expand outward in the mold-open state, leaving enough space for placing and removing the part. In the mold-closed state, the punch and slider squeeze against each other, thus forming out-of-round products. This can improve product quality in a short period of time and ensure that the product dimensions meet the standards and remain stable after rectification. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the circular product shaping mold provided in this embodiment of the utility model;

[0020] Figure 2 This is a top view of the lower mold base according to an embodiment of the present utility model;

[0021] Figure 3 This is a schematic diagram illustrating the cooperation between the punch, slider, and guide seat in an embodiment of this utility model.

[0022] In the attached image:

[0023] 1. Lower mold base; 2. Upper mold base; 3. Guide plate; 4. Fixed base; 5. Radial guide groove; 6. Punch; 7. Guide block; 8. Core rod; 9. Guide seat; 10. Slider; 11. Ejector pin; 12. First return spring; 13. Positioning block; 14. Pressure plate; 15. Second return spring; 16. Guide post; 17. Guide sleeve; 18. Limiting post; 19. Lower support plate; 20. Pad. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0025] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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 utility model based on the specific circumstances.

[0026] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to 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 merely used to distinguish between different terms in description and do not have any special meaning.

[0029] Please see Figures 1 to 3 As shown, this embodiment provides a round product forming mold, including a lower mold base 1 and an upper mold base 2. The lower mold base 1 is provided with a guide plate 3 and a fixed base 4. The guide plate 3 is provided with a plurality of radial guide grooves 5. The upper surface of the guide plate 3 is provided with a punch 6 corresponding to each radial guide groove 5. Each punch 6 is provided with a guide block 7 that slides in the radial guide groove 5. The upper mold base 2 is provided with a mandrel 8 that drives each punch 6 to expand outward. The fixed base 4 is located on the outer ring of the guide plate 3. The upper surface of the fixed base 4 is provided with a guide seat 9 corresponding to each punch 6. Each guide seat 9 and punch 6 is provided with a slider 10. The slider 10 and the guide seat 9 are inclinedly engaged. The upper mold base 2 is provided with a top post 11 that drives each slider 10 downward and retracts towards the guide plate 3. The slider 10 and the punch 6 cooperate to apply pressure to the product to be formed.

[0030] Therefore, the original forming structure of the die-concave mold was changed, and a special structure of the punch 6 and slider 10 was designed. In the mold-open state, the punch 6 retracts inward and the slider 10 expands outward, leaving enough space for placing and removing parts. In the mold-closed state, the punch 6 and slider 10 squeeze each other to form out-of-round products. This can improve product quality in a short period of time and ensure that the product dimensions meet the standards and are stable after rectification.

[0031] Optionally, a first return spring 12 facing the punch 6 is installed on the fixed base 4. The first return spring 12 is used to give each punch 6 an inward contraction force.

[0032] Therefore, the first reset spring 12 automatically pushes the punch 6 inward when the mold is opened, ensuring accurate mold reset, improving operating efficiency, and facilitating material feeding and unloading operations.

[0033] Furthermore, a positioning block 13 is provided on the guide block 7, and the first reset spring 12 abuts against the positioning block 13 to realize the reset drive of the punch 6.

[0034] Furthermore, a pressure plate 14 is provided on the lower surface of the guide block 7. The pressure plate 14 is used to restrict the guide block 7 from being dislodged from the radial guide groove 5, ensuring that the punch 6 can only reciprocate along the radial guide groove 5.

[0035] Optionally, a second return spring 15 facing the slider 10 is installed on the fixed base 4. The second return spring 15 is used to give each slider 10 an upward pushing force.

[0036] Therefore, the second reset spring 15 automatically pushes the slider 10 up the inclined surface of the guide seat 9 when the mold is opened, ensuring that the slider 10 quickly resets and separates from the punch 6 when the mold is opened, avoiding jamming, and facilitating the placement and removal of parts.

[0037] Optionally, the slider 10 and the guide seat 9 are also connected by a dovetail joint. This dovetail joint ensures accurate alignment between the slider 10 and the guide seat 9, guaranteeing accurate displacement of the slider 10 and further improving shaping accuracy and stability.

[0038] Specifically, there are six punches 6, guide seats 9, sliders 10 and ejector pins 11, and the mandrel 8 is a hexagonal prism shape that mates with the inclined surfaces of the six punches 6.

[0039] Optionally, the upper mold base 2 and the lower mold base 1 are connected by guide pillars 16 and guide sleeves 17.

[0040] Therefore, the precise cooperation between the guide post 16 and the guide sleeve 17 ensures accurate alignment between the upper mold base 2 and the lower mold base 1, improves the overall stability of the mold, extends its service life, and further guarantees the product shaping effect.

[0041] Optionally, limit posts 18 are provided on the upper mold base 2 and the lower mold base 1 respectively, and the limit posts 18 of the upper mold base 2 abut against the limit posts 18 of the lower mold base 1 when the mold is closed.

[0042] Therefore, by having the upper and lower limit posts 18 abut against each other, the mold closing accuracy is ensured, excessive extrusion is prevented, the mold and product are further protected, and the safety and reliability of the overall operation are improved.

[0043] Optionally, a lower support plate 19 is provided below the lower mold base 1, and a pad 20 is provided between the lower support plate 19 and the lower mold base 1.

[0044] Therefore, by adjusting the height of the lower mold base 1 using the pad 20, it is ensured that the mold can be accurately aligned with workpieces of different heights, and the support strength of the lower mold base 1 is improved, thereby further enhancing molding accuracy and product quality.

[0045] Specific work process:

[0046] 1) When the mold is in the open state, the mandrel 8 is located above the multi-lobed punch 6. Each punch 6 is in the inward state under the force of the first return spring 12, and the slider 10 is in the outward and lifted state under the force of the second return spring 15. The gap between the inward punch 6 and the outward slider 10 can be used to place out-of-round round products, so that there is enough space for easy placement of parts.

[0047] 2) During the mold closing process, as the upper mold base 2 moves downward, the mandrel 8 enters the center of each punch 6 and begins to cooperate with the inclined surface of each punch 6; the upper mold base 2 continues to move downward, and each punch 6 is driven by the mandrel 8 to expand outward along the radial guide groove 5. At this time, the first return spring 12 is compressed by the positioning block 13 installed on the punch 6, and the slider 10 is driven by the ejector pin 11 to retract and move downward along the cooperation inclined surface of the guide seat 9. At the same time, the second return spring 15 is compressed by the pressure of the slider 10; as the punch 6 expands outward and the slider 10 retracts inward, the round product achieves the effect of correcting the out-of-roundness under the pressure of the punch 6 and the slider 10. The final position of the punch 6 and the slider 10 stops due to the contact of the limiting pin 18.

[0048] 3) After the shaping is completed, the mold is opened again. The upper mold base 2 begins to lift, and the mandrel 8 begins to move upward with the upper mold base 2. The punch 6 begins to move back to the initial inward state under the force of the first return spring 12. The ejector 11 also moves upward with the upper mold base 2. The second return spring 15, which is in a compressed state, begins to apply ejection force to the slider 10. The slider 10 returns to the outward expansion and ejection initial position, which is convenient for removing the part. The shaping process is now complete.

[0049] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A round product sizing die comprising a lower die shoe (1) and an upper die shoe (2), characterized in that, The lower die seat (1) is provided with a guide plate (3) and a fixing seat (4), a plurality of radial guide grooves (5) are formed in the guide plate (3), the upper surface of the guide plate (3) is provided with a punch (6) corresponding to each radial guide groove (5), each punch (6) is provided with a guide block (7) sliding in the radial guide groove (5), the upper die seat (2) is provided with a core rod (8) driving each punch (6) to expand outward, the fixing seat (4) is located at the outer circle of the guide plate (3), the upper surface of the fixing seat (4) is provided with a guide seat (9) corresponding to each punch (6), each guide seat (9) and the punch (6) are provided with a sliding block (10), the sliding block (10) is matched with the inclined surface of the guide seat (9), the upper die seat (2) is provided with a top column (11) driving each sliding block (10) to contract downward and toward the guide plate (3), the sliding block (10) is matched with the punch (6) to press the product to be shaped.

2. The circular product sizing die of claim 1, wherein, The fixing seat (4) is installed with a first reset spring (12) facing the punch (6), and the first reset spring (12) is used to give an inward contraction force to each punch (6).

3. The circular product sizing die of claim 2, wherein, The guide block (7) is provided with a positioning block (13), and the first reset spring (12) abuts against the positioning block (13).

4. The circular product sizing die of claim 1 wherein, The lower surface of the guide block (7) is provided with a pressing plate (14), and the pressing plate (14) is used to limit the guide block (7) from being pulled out of the radial guide groove (5).

5. The circular product sizing die of claim 1 wherein, The fixing seat (4) is installed with a second reset spring (15) facing the sliding block (10), and the second reset spring (15) is used to give an upward lifting force to each sliding block (10).

6. The circular product sizing die of claim 1 wherein, The sliding block (10) and the guide seat (9) are further matched through dovetail.

7. The circular product sizing die of claim 1 wherein, The punch (6), the guide seat (9), the sliding block (10) and the top column (11) are all provided with six, and the core rod (8) is a hexagonal prism matched with the inclined surface of the six punches (6).

8. The circular product sizing die of claim 1 wherein, The upper die seat (2) and the lower die seat (1) are matched through guide columns (16) and guide sleeves (17).

9. The circular product sizing die of claim 1 wherein, The upper die seat (2) and the lower die seat (1) are respectively provided with a limiting column (18), and the limiting column (18) of the upper die seat (2) abuts against the limiting column (18) of the lower die seat (1) when the mold is closed.

10. The circular product sizing die of claim 1, wherein, The lower die seat (1) is provided with a lower supporting plate (19), and the lower supporting plate (19) and the lower die seat (1) are provided with a foot pad (20).

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