Stable machining device based on large necking amount treatment

Abstract

The utility model discloses a stable processing device based on large necking amount processing, which comprises an upper template and a lower template, and an ejector block is arranged on the inner side of the lower template; the female die sheath is rotationally mounted on the lower die plate, and a female die is arranged on the inner side of the female die sheath; the upper die fixing plate is fixed to the lower surface of the upper die plate, and a male die extending into the inner side of the female die is arranged on the lower surface of the upper die fixing plate; according to the device, the elastic assembly and the core die are arranged, the flow of necking product materials is controlled in the whole process through the female die on the outer wall of a product and the male die and the core die on the inner wall, and therefore the product is subjected to the inward supporting force of the female die on the product and the outward supporting force of the male die and the core die in the whole necking process; therefore, the product cannot deform due to unbalanced internal and external acting forces in the whole necking process, the necking stability is guaranteed, and the smooth transition effect of the appearance of the product after necking is improved.

Description

Technical Field

[0001] This utility model specifically relates to a stable processing device based on large necking amount processing. Background Technology

[0002] Narrowing is a forming process that reduces the opening of a pre-formed cylindrical or tubular blank using a narrowing mold. Narrowing is widely used in the forming of parts such as steel gas cylinders, bicycle frame stems, bicycle saddle tubes, and automobile tailpipes. When performing large-angle narrowing on thin-walled tubular parts, especially those with a narrowing amount between 15% and 30%, spherical or beveled narrowing tailpipes, instability often occurs during the narrowing process due to the difference in hardness between the weld and other areas, and the lack of internal support. This often results in weld depressions and product scrap. Therefore, we propose a stable processing device based on large narrowing volume processing. Utility Model Content

[0003] The purpose of this invention is to provide a stable processing device based on large necking amount processing to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a stable processing device based on large necking amount processing, comprising:

[0005] Upper template and lower template, wherein a top material block is provided on the inner side of the lower template;

[0006] A die sleeve is rotatably mounted on the lower template, and a die is provided on the inner side of the die sleeve;

[0007] An upper mold fixing plate is fixed to the lower surface of the upper mold plate, and a punch extending into the inner side of the die is provided on the lower surface of the upper mold fixing plate;

[0008] The core mold is mounted on the lower end of the punch via an elastic component.

[0009] Preferably, the elastic component includes a shaft bolt and a spring, the shaft bolt is slidably connected to the inner side of the core mold, one end of the shaft bolt is engaged with the punch through a threaded portion, and a spring is provided between the punch and the core mold.

[0010] Preferably, the springs are evenly distributed in four locations along the circumference of the axial bolts.

[0011] Preferably, the cross-section of the axial bolt is stepped.

[0012] Preferably, the lower template is provided with a bearing seat that mates with the die sleeve, and the bearing seat has a planar bearing on its inner side.

[0013] Preferably, an outer mold is fitted onto the outer surface of the concave mold sleeve, and a guide plate is detachably connected to the top of the outer mold.

[0014] Preferably, the inner diameter of the guide plate is greater than or equal to the inner diameter of the die, and both the upper and lower ends of the inner side of the guide plate are chamfered.

[0015] Preferably, the lower surface edge of the upper template is provided with an upper limit post, and the upper surface edge of the lower template is provided with a lower limit post corresponding to the upper limit post.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This patented device, by incorporating elastic components and a core mold, avoids instability that frequently occurs during the shrinking process due to a lack of support on the inner wall, which can cause depressions at the weld. The device controls the material flow of the shrinking product throughout the process by using a concave mold on the outer wall and a convex mold and core mold on the inner wall. This ensures that the product is supported inward by the concave mold and outward by the convex mold and core mold, preventing deformation due to an imbalance of internal and external forces. This guarantees a smooth shrinking process, improves the smoothness of the product's shape after shrinking, and reduces the occurrence of depressions. Attached Figure Description

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

[0019] In the diagram: 1. Upper template; 2. Fixing plate; 3. Upper limit post; 4. Punch; 5. Narrowed product; 6. Die; 7. Shaft bolt; 8. Core mold; 9. Lower limit post; 10. Ejector block; 11. Lower template; 12. Surface bearing; 13. Bearing seat; 14. Die sleeve; 15. Spring; 16. Outer mold; 17. Guide plate. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1 This utility model provides a technical solution: a stable processing device based on large necking amount processing, comprising:

[0022] The upper template 1 and the lower template 11 are provided. The inner side of the lower template 11 is provided with a top material block 10, which facilitates the ejection of the product after the shrinkage is completed.

[0023] The die sleeve 14 is rotatably mounted on the lower template 11, and the die sleeve 14 has a die 6 inside.

[0024] The upper mold fixing plate 2 is fixed to the lower surface of the upper mold plate 1, and the lower surface of the upper mold fixing plate 2 is provided with a punch 4 that extends into the inner side of the die 6;

[0025] The core mold 8 is installed at the lower end of the punch 4 via an elastic component, which facilitates the support of the inner wall of the narrowed product 5 and prevents the weld seam of the narrowed product 5 from sinking during narrowing.

[0026] In this embodiment, preferably, the elastic component includes a shaft bolt 7 and a spring 15. The shaft bolt 7 is slidably connected to the inner side of the core mold 8. The shaft bolt 7 can control the movement direction of the component and limit the movement position of the component. One end of the shaft bolt 7 is engaged with the punch 4 through a threaded part. There is a spring 15 between the punch 4 and the core mold 8, so that after the core mold 8 contacts the lower inner side of the narrowed product 5, the punch 4 continues to move downward to continuously support the inner side of the narrowed product 5.

[0027] In this embodiment, preferably, the spring 15 is evenly distributed in four places around the axial bolt 7, so that the punch 4 can evenly transmit the downward pressure to the core mold 8.

[0028] In this embodiment, preferably, the cross-section of the shaft bolt 7 is stepped, which facilitates the quick connection between the punch 4 and the core mold 8, and at the same time, when the punch 4 moves down, the inner side of the core mold 8 can slide along the shaft bolt 7.

[0029] In this embodiment, preferably, the lower template 11 is provided with a bearing seat 13 that cooperates with the die sleeve 14. The bearing seat 13 has a plane bearing 12 on its inner side, which makes it easy for the die 6 and the die sleeve 14 to rotate together in the middle of the outer mold 16. The product rotation is to prevent the product with the upper opening from being placed at the wrong angle and to correct the product's upper opening slope to be aligned with the upper mold slope.

[0030] In this embodiment, preferably, an outer mold 16 is fitted on the outer surface of the concave mold sleeve 14, and a guide plate 17 is detachably connected to the top of the outer mold 16 to facilitate the guiding and placement of the product.

[0031] In this embodiment, preferably, the inner diameter of the guide plate 17 is greater than or equal to the inner diameter of the die 6, and both the upper and lower ends of the inner side of the guide plate 17 are chamfered to facilitate product placement and prevent the product from tipping over and smoothly guiding it into the die 6.

[0032] In this embodiment, preferably, an upper limit post 3 is provided on the lower surface edge of the upper template 1, and a lower limit post 9 corresponding to the upper limit post 3 is provided on the upper surface edge of the lower template 11, so that the template can be limited after moving to a predetermined position during the narrowing process.

[0033] The working principle and usage process of this utility model are as follows: In use, the narrowed product 5 is placed in the guide plate 17, which is on the die 6. The guide plate 17 has a hole 0.8mm larger than the die 6 and a 10mm tapered bottom to facilitate product placement and prevent product tipping, and to smoothly guide the product into the die 6. The upper template 1 drives the punch 4 and the core mold 8 to press down. The core mold 8 first enters the product to guide the narrowed product 5. The upper template 1 continues to move down, and the upper end face of the narrowed product 5 contacts the upper mold fixing plate 2. The upper mold fixing plate 2 applies force to the narrowed product 5, and the narrowed product 5 moves downward and narrows through the die. When the narrowed product 5 narrows to a certain extent, the core mold 8 and the ejector block 10 come into contact. In this way, a distance equal to the wall thickness gap is generated between the core mold 8 and the die 6. The narrowed product 5 controls the narrowing through the gap to prevent the product from narrowing too much and becoming unstable. When the upper limit post 3 contacts the lower limit post 9, the product narrowing is in place.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A stable processing device based on large necking amount processing, characterized in that, include: Upper template (1) and lower template (11), wherein a top material block (10) is provided on the inner side of the lower template (11); A die sleeve (14) is rotatably mounted on the lower template (11), and a die (6) is provided inside the die sleeve (14); The upper mold fixing plate (2) is fixed to the lower surface of the upper template (1), and the lower surface of the upper mold fixing plate (2) is provided with a punch (4) that extends into the inner side of the die (6); The core mold (8) is mounted on the lower end of the punch (4) via an elastic component.

2. The stable processing device based on large necking amount processing according to claim 1, characterized in that: The elastic component includes a shaft bolt (7) and a spring (15). The shaft bolt (7) is slidably connected to the inner side of the core mold (8). One end of the shaft bolt (7) is engaged with the punch (4) through a threaded part. A spring (15) is provided between the punch (4) and the core mold (8).

3. The stable processing device based on large necking amount processing according to claim 2, characterized in that: The spring (15) is evenly distributed in four places along the circumference of the shaft bolt (7).

4. The stable processing device based on large necking amount processing according to claim 2, characterized in that: The cross-section of the axial bolt (7) is stepped.

5. The stable processing device based on large necking amount processing according to claim 1, characterized in that: The lower template (11) is provided with a bearing seat (13) that cooperates with the die sleeve (14), and the bearing seat (13) has a flat bearing (12) on its inner side.

6. The stable processing device based on large necking amount processing according to claim 1, characterized in that: The outer surface of the concave mold sleeve (14) is fitted with an outer mold (16), and the top of the outer mold (16) is detachably connected to a guide plate (17).

7. A stable processing device based on large necking amount processing according to claim 6, characterized in that: The inner diameter of the guide plate (17) is greater than or equal to the inner diameter of the die (6), and both the upper and lower ends of the inner side of the guide plate (17) are chamfered.

8. The stable processing device based on large necking amount processing according to claim 1, characterized in that: The upper template (1) has an upper limit post (3) on its lower surface edge, and the lower template (11) has a lower limit post (9) on its upper surface edge that corresponds to the upper limit post (3).

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