Device and method for forming toothed bolt on bearing surface of inner hexagonal flange

Abstract

The invention discloses an inner hexagonal flange bearing surface toothed bolt forming device and a forming method.The forming device is used for forming an inner hexagonal hole in the head of an inner hexagonal bolt and a toothed flange and comprises an upper die, an upper punching die, a hexagonal punching rod, a spring, a material returning ejector pin and a forming lower die; the upper punching die and the lower forming die are both provided with forming die cavities, the upper punching die and the lower forming die are oppositely arranged, the upper punching die is elastically supported on the upper die through a spring, the hexagonal punching rod is arranged on the upper punching die in the axis direction of the upper punching die, one end of the hexagonal punching rod extends into the forming die cavity of the upper punching die, and the material returning ejector pin is connected to the upper die in a sliding mode. And the upper punching die is unloaded.

Description

TECHNICAL FIELD

[0001] The application relates to a hexagonal flange bearing surface toothed bolt forming device and a forming method. BACKGROUND

[0002] The hexagonal flange bearing surface toothed bolt is used for installation in a small space and is widely applied in the fields of automobiles and the like. At present, the product is processed by hot forming and machining, the existing hexagonal flange bearing surface toothed bolt forming device has a complex structure, and since the hexagonal hole, the flange and the tooth shape are punched at the same time, the existing device has many processing procedures and low efficiency. SUMMARY

[0003] The application provides a hexagonal flange bearing surface toothed bolt forming device and a forming method to solve the problems of the prior art.

[0004] The application adopts the technical scheme of:

[0005] The hexagonal flange bearing surface toothed bolt forming device is used for forming of a hexagonal hole in a hexagonal bolt head and a toothed flange, and comprises an upper die, an upper punch, a hexagonal punch rod, a spring, a material discharging ejector pin and a forming lower die, the upper punch and the forming lower die are both provided with a forming cavity, the upper punch and the forming lower die are oppositely arranged, the upper punch is elastically supported on the upper die through the spring, the hexagonal punch rod is arranged on the upper punch along the axial direction of the upper punch, and one end of the hexagonal punch rod extends into the forming cavity of the upper punch, and the material discharging ejector pin is slidably connected to the upper die and used for discharging the upper punch.

[0006] Further, the upper die comprises an upper punch pad sleeve, an ejector pin pad sleeve, a hexagonal punch rod top sleeve and an upper punch sleeve, the upper punch pad sleeve is fixed with the upper punch sleeve, the ejector pin pad sleeve is slidably connected in the upper punch sleeve, one end of the spring abuts against the ejector pin pad sleeve and the other end abuts against the upper punch, the hexagonal punch rod top sleeve is slidably connected in the upper punch, the hexagonal punch rod is coaxially arranged in the hexagonal punch rod top sleeve, and the corresponding end of the material discharging ejector pin abuts against the hexagonal punch rod top sleeve.

[0007] Further, the ejector pin pad sleeve, the hexagonal punch rod top sleeve and the upper punch are all provided with a stepped portion for limiting sliding.

[0008] Further, a punch rod pad is arranged between the upper punch pad sleeve and the upper punch sleeve.

[0009] Further, an upper punch pad is arranged between the punch rod pad and the hexagonal punch rod, and the upper punch pad is coaxially arranged with the hexagonal punch rod.

[0010] Further, the material discharging ejector pin is fixed with the upper punch pad.

[0011] The application further discloses a forming method of the forming device,

[0012] (1) When not shaped, the upper punch extends due to the spring force;

[0013] (2) The clamp transfers the three-station blank to the lower forming die;

[0014] (3) The lower forming die moves to the right, the end faces of the upper punch and the lower forming die contact, the upper punch continues to move to the right, and as the spring is compressed, the upper punch and the lower forming die are tightly integrated as a whole, forming a closed mold cavity;

[0015] (4) The upper punch continues to move to the right, driving the six-sided punch rod, the six-sided punch rod top sleeve, the upper punch sleeve, the upper punch, the upper punch pad, the punch rod pad and the upper punch pad sleeve to slide as a whole, and the six-sided punch rod and the six-sided punch rod top sleeve complete the forming of the internal hexagonal hole and the flange bearing surface with teeth in the closed mold cavity;

[0016] (5) After forming, the upper punch moves to the left, at this time the upper punch pad quickly moves to the right under the action of the upper material removal mechanism, the material removal ejector pin is driven by the upper punch pad, and the six-sided punch rod top sleeve is simultaneously moved to the right, since the six-sided punch rod is limited by the ejector pin pad sleeve and cannot move to the right, the six-sided punch rod top sleeve pushes the product out of the upper punch after moving to the right, and the material removal is completed.

[0017] The present application has the following beneficial effects:

[0018] Traditional internal hex flange bearing surface with teeth bolt processing usually adopts hot forming and machining method, which needs to go through multiple processes to complete the punching of hexagonal hole, upsetting of flange and tooth shape, etc. The process is complicated and the conversion process is time-consuming. The forming device of the present application can complete the punching of hexagonal hole, upsetting of flange and tooth shape at the same time on one equipment, greatly reducing the processing procedures, thereby significantly improving the production efficiency. Since the process conversion and intermediate links are reduced, the entire forming cycle is shortened. From the blank transfer to the lower forming die, to the final product forming and material removal, the whole process is more compact and coherent, more products can be produced per unit of time, meeting the needs of large-scale production.

[0019] The forming device of the present application adopts upper punch die design, through the combination of structure of limiting spring, movable mold cavity and three-pin material removal, the overall structure of the mold is more compact. This compact design not only saves space, but also improves the stability and reliability of the mold, reducing the risk of failure caused by complex structure.

[0020] The layout of each component, such as the upper punch, the hexagonal punch rod, the spring, the material removal ejector pin and the like, is reasonable, and the components are closely matched with each other. For example, the elastic support function of the spring can ensure the accurate movement and resetting of the upper punch during the forming process; the hexagonal punch rod is arranged along the axial direction of the upper punch, thereby ensuring the accurate forming of the internal hexagonal hole; the sliding connection and the limiting design of the material removal ejector pin make the material removal process smoother and more reliable. The reasonable layout of the components makes the whole forming device more efficient and stable during operation. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The structure diagram of the present application. DETAILED DESCRIPTION

[0022] The present application will be further described below with reference to the accompanying drawings.

[0023] As Figure 1 , the present application is a kind of internal hexagonal flange face bolt forming device with teeth, the forming device is used for the forming of internal hexagonal hole and toothed flange of internal hexagonal bolt head, the device includes upper die, upper punch 6, hexagonal punch rod 7, spring 8, material removal ejector pin 10 and forming lower die 12, upper punch 6 and forming lower die 12 are both provided with forming cavity, upper punch 6 and forming lower die 12 are oppositely arranged, upper punch 6 is elastically supported on the upper die by spring 8, hexagonal punch rod 7 is arranged on upper punch 6 along the axial direction of upper punch 6, and one end of hexagonal punch rod 7 extends into the forming cavity of upper punch 6, material removal ejector pin 10 is slidably connected on the upper die for discharging upper punch 6.

[0024] The upper die in the present application includes upper punch pad sleeve 1, ejector pin pad sleeve 3, hexagonal punch rod top sleeve 4 and upper punch sleeve 5, upper punch pad sleeve 1 is fixed with upper punch sleeve 5, ejector pin pad sleeve 3 is slidably connected in upper punch sleeve 5, one end of spring 8 abuts against ejector pin pad sleeve 3, and the other end abuts against upper punch 6, hexagonal punch rod top sleeve 4 is slidably connected in upper punch 6, hexagonal punch rod 7 is coaxially arranged in hexagonal punch rod top sleeve 4, and the corresponding end of material removal ejector pin 10 abuts against hexagonal punch rod top sleeve 4.

[0025] In order to limit the sliding components, step portions for limiting sliding are arranged on ejector pin pad sleeve 3, hexagonal punch rod top sleeve 4 and upper punch 6.

[0026] A punch rod pad 2 is arranged between upper punch pad sleeve 1 and upper punch sleeve 5. A upper punch pad 9 is arranged between punch rod pad 2 and hexagonal punch rod 7, and the upper punch pad 9 is coaxially arranged with hexagonal punch rod 7.

[0027] The forming method of the present application is specifically as follows:

[0028] (1) When not forming, upper punch 6 is extended due to the elastic force of spring 8;

[0029] (2) the clamp transfers the three-station blank to the forming lower die 12;

[0030] (3) the forming lower die 12 moves to the right, the end faces of the upper punch 6 and the forming lower die 12 are in contact, the upper punch continues to move to the right, as the spring 8 is compressed, the upper punch 6 and the forming lower die 12 are tightly combined as a whole, forming a closed mold cavity;

[0031] (4) the upper punch continues to move to the right, driving the hexagonal punch rod 7, the hexagonal punch rod top sleeve 4, the upper punch sleeve 5, the upper punch 6, the upper punch pad 9, the punch rod pad 2 and the upper punch pad sleeve 1 to slide as a whole, the hexagonal punch rod 7 and the hexagonal punch rod top sleeve 4 complete the forming of the internal hexagonal hole and the flange bearing surface with teeth in the closed mold cavity;

[0032] (5) after forming, the upper punch moves to the left, at this time, the upper punch pad 11 moves quickly to the right under the action of the upper material removal mechanism, the upper punch pad 11 drives the material removal ejector pin 10, and the material removal ejector pin 10 drives the hexagonal punch rod top sleeve 4 to move to the right at the same time, since the hexagonal punch rod 7 is limited by the ejector pad sleeve 3 and cannot move to the right, the hexagonal punch rod top sleeve 4 pushes the product out of the upper punch 6 after moving to the right, completing the material removal.

[0033] During the forming process, the upper punch and the forming lower die are tightly combined to form a closed mold cavity, and the hexagonal punch rod and the hexagonal punch rod top sleeve complete the forming of the internal hexagonal hole and the flange bearing surface with teeth in the mold cavity. This closed mold cavity forming method can ensure the accuracy and consistency of product size, reduce product defects caused by mold gap or machining error, and thus improve product quality.

[0034] The elastic support of the spring and the limiting design of each component make the forming process more stable. Under the action of the spring force, the upper punch can accurately extend and reset, ensuring that the starting position and movement process of each forming are consistent. At the same time, the design of the limiting step can effectively prevent excessive displacement or misplacement of the components during sliding, further ensuring the stability of the forming process and improving the quality stability of the products.

[0035] Since the forming device of the present application can complete multiple machining operations on one equipment, compared with the traditional multi-process machining method, the number and types of equipment required are reduced. Enterprises do not need to purchase and maintain multiple equipment with different functions, thereby reducing equipment procurement costs and equipment maintenance costs. Simplifying the processing procedures and forming cycle makes the entire production process more automated and efficient, reducing the dependence on manual labor. The operator can complete more production tasks in a shorter time, improving labor productivity and thus reducing the production cost per unit of product. Accurate forming effect and stable forming process can reduce material waste caused by machining error or product defects. The consistency and pass rate of the products are improved, which means that more raw materials can be converted into qualified products, reducing material costs.

[0036] The above merely describes the preferred embodiments of the present application, and it should be pointed out that those skilled in the art can make several improvements without departing from the principles of the present application, and these improvements should also be considered as the protection scope of the present application.

Claims

1. A forming device for a hexagon socket flange bearing surface toothed bolt, the forming device is used to form a hexagonal hole and a toothed flange on the head of a hexagon socket bolt, characterized in that: include Upper die, upper punch (6), hexagonal punch (7), spring (8), ejector pin (10) and lower forming die (12), The upper punch die (6) and the lower forming die (12) are both provided with forming cavities. The upper punch die (6) and the lower forming die (12) are arranged relative to each other. The upper punch (6) is elastically supported on the upper die by a spring (8). The hexagonal punch (7) is arranged on the upper punch (6) along the axial direction of the upper punch (6), and one end of the hexagonal punch (7) extends into the forming cavity of the upper punch (6). The ejector pin (10) is slidably connected to the upper die and is used for unloading the upper punch die (6).

2. The hexagon socket flange bearing surface toothed bolt forming device according to claim 1, characterized in that: The upper die comprises an upper punch sleeve (1), an ejector sleeve (3), a hexagonal punch sleeve (4) and an upper die sleeve (5). The upper punch sleeve (1) is fixed to the upper die sleeve (5), the ejector sleeve (3) is slidably connected in the upper die sleeve (5), one end of the spring (8) abuts against the ejector sleeve (3), and the other end abuts against the upper die (6). The hexagonal punch top sleeve (4) is slidably connected in the upper punch die (6), the hexagonal punch (7) is coaxially arranged in the hexagonal punch top sleeve (4), and the corresponding end of the ejector pin (10) contacts the hexagonal punch top sleeve (4).

3. The hexagon socket flange bearing surface toothed bolt forming device according to claim 2, characterized in that: The ejector pin sleeve (3), the hexagonal punch sleeve (4) and the upper punch die (6) are all provided with a step portion for sliding limitation.

4. The hexagon socket flange bearing surface toothed bolt forming device according to claim 2, characterized in that: A punch pad (2) is provided between the upper punch pad sleeve (1) and the upper punch die sleeve (5).

5. The hexagon socket flange bearing surface toothed bolt forming device according to claim 4, characterized in that: An upper die pad (9) is provided between the punch pad (2) and the hexagonal punch (7), and the upper die pad (9) and the hexagonal punch (7) are coaxially arranged.

6. The hexagon socket flange bearing surface toothed bolt forming device according to claim 4, characterized in that: An upper punch pad (11) is fixed on the ejector pin (10).

7. A molding method according to any one of claims 1 to 6, characterized in that: (1) When the mold is not formed, the upper punch (6) extends due to the elastic force of the spring (8); (2) The clamp transfers the three-station blank to the forming lower die (12); (3) the lower forming die (12) moves to the right, the end faces of the upper punch (6) and the lower forming die (12) come into contact, the upper punch continues to move to the right, and as the spring (8) is compressed, the upper punch (6) and the lower forming die (12) are tightly combined into a whole, forming a closed die cavity; (4) The upper punch continues to move to the right, driving the hexagonal punch (7), the hexagonal punch top sleeve (4), the upper punch sleeve (5), the upper punch (6), the upper punch pad (9), the punch pad (2) and the upper punch sleeve (1) to slide as a whole, and the hexagonal punch (7) and the hexagonal punch top sleeve (4) complete the forming of the inner hexagonal hole and the teeth of the flange bearing surface in the closed die cavity; (5) After forming, the upper punch moves to the left. At this time, the upper punch pad (11) moves to the right quickly under the action of the upper material removal mechanism. The upper punch pad (11) drives the material removal ejector (10). The material removal ejector (10) drives the hexagonal punch top sleeve (4) to move to the right at the same time. Since the hexagonal punch (7) is limited by the ejector pad (3) and cannot move to the right, the hexagonal punch top sleeve (4) moves to the right and pushes the product out of the upper punch (6) to complete the material removal.

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