Thread rolling dies for aircraft screw production

Abstract

This utility model relates to the field of screw thread rolling technology and discloses a thread rolling plate for aviation screw production, including an upper thread rolling plate, a fixing block, and a lower thread rolling plate. The fixing block has multiple limiting holes at both its upper and lower ends. The lower end of the upper thread rolling plate is provided with multiple upper limit posts, and the upper end of the lower thread rolling plate is provided with multiple lower limit posts. Each upper and lower limit post has a connecting hole. The front wall of the fixing block is provided with multiple long bolts, all of which are rotatably connected to the connecting holes. The tail ends of the long bolts are all threaded. In this utility model, the upper and lower thread rolling plates are installed on the upper and lower ends of the fixing block. The upper and lower limit posts are inserted into the corresponding limiting holes, and the long bolts are screwed into the connecting holes to fix and tighten the upper and lower thread rolling plates. The double-sided thread rolling structure improves work efficiency and saves time.

Description

Technical Field

[0001] This utility model relates to the field of screw thread rolling technology, specifically to a thread rolling plate for the production of aerospace screws. Background Technology

[0002] In the aerospace industry, screws are critical fasteners, and their quality directly affects the safety and reliability of aircraft. Aerospace screws are mostly manufactured using high-strength alloy materials (such as titanium alloys and nickel-based superalloys), placing extremely high demands on thread machining accuracy, surface quality, and production efficiency.

[0003] Traditional thread rolling dies are designed with only one thread rolling groove, which cannot perform thread rolling operations on both the top and bottom simultaneously, reducing work efficiency and wasting time. Furthermore, the existing thread rolling grooves are not wear-resistant enough and are prone to rapid wear due to intense friction from high-hardness materials, resulting in deviations in thread dimensions and failure to meet accuracy standards, thus affecting their use. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a thread rolling dies for aviation screw production, which has advantages such as double-sided thread rolling and solves the problems mentioned in the background technology.

[0005] To achieve the above-mentioned purpose of double-sided thread rolling, this utility model provides the following technical solution: a thread rolling slab for aviation screw production, comprising an upper thread rolling slab, a fixing block, and a lower thread rolling slab; The fixed block has multiple limiting holes at both the upper and lower ends. The upper end of the upper thread rolling plate is provided with multiple upper limit posts. The upper end of the lower thread rolling plate is provided with multiple lower limit posts. Both the upper and lower limit posts are provided with connecting holes. The front wall of the fixed block is provided with multiple long bolts. All the long bolts are rotatably connected to the connecting holes. The tail ends of the long bolts are provided with threads.

[0006] As a further improvement of this utility model: the upper and lower thread rolling plates have parallel thread rolling grooves on their surfaces, the cross-section of the thread rolling grooves is involute, and the groove width gradually narrows from the inlet to the outlet, thereby improving the quality of thread forming.

[0007] As a further improvement of this utility model: sealing gaskets are provided at both the upper and lower ends of the fixing block. The sealing gaskets are made of rubber material. The sealing gaskets improve the sealing performance of the contact surfaces between the upper and lower thread rolling plates and the fixing block, preventing moisture and dust from entering the interior and preventing internal contamination.

[0008] As a further improvement of this utility model: the surface of the thread rolling groove is covered with a cemented carbide coating with a thickness of 8-12μm. The cemented carbide coating has excellent wear resistance and impact resistance, which can effectively resist the frictional loss of high-strength alloy materials and extend the service life of the thread rolling plate.

[0009] As a further improvement of this utility model, the surface of the cemented carbide coating is provided with a nano-level lubricating film. The nano-level lubricating film further reduces the friction during the thread rolling process, reduces adhesion, and improves the surface finish of the thread.

[0010] As a further improvement of this utility model, the upper thread rolling plate, the fixing block and the lower thread rolling plate are all made of carbon steel, which improves the strength.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. In this utility model, the upper and lower thread rolling plates are installed on the upper and lower ends of the fixing block, the upper limit post and the lower limit post are inserted into the corresponding limit holes, and the long bolts are screwed into the connecting holes to fix and install the upper and lower thread rolling plates respectively. The double-sided thread rolling structure improves the efficiency of the operation and saves time.

[0012] 2. In this utility model, the cemented carbide coating has excellent wear resistance and impact resistance, which can effectively resist the frictional loss of high-strength alloy materials and extend the service life of the thread rolling plate. A nano-level lubricating film is also coated on the outside of the cemented carbide coating to further reduce the friction during the thread rolling process, reduce adhesion, and improve the surface finish of the thread. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the appearance of the present utility model; Figure 2 This is a schematic diagram of the exploded structure of this utility model; Figure 3 In this utility model Figure 2 Enlarged schematic diagram of point A; Figure 4 This is a schematic diagram of the appearance of the long bolt in this utility model.

[0014] In the diagram: 1. Fixing block; 2. Upper thread rolling plate; 3. Lower limit post; 4. Upper limit post; 5. Lower thread rolling plate; 6. Limiting hole; 7. Sealing gasket; 8. Thread rolling groove; 9. Thread; 10. Long bolt; 11. Connecting hole. Detailed Implementation

[0015] 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.

[0016] It should be noted that both cemented carbide coatings and nanoscale lubricating films are existing technologies and common knowledge to those skilled in the art, and will not be elaborated upon here.

[0017] Please see Figures 1-4 In this embodiment of the utility model, the thread rolling plate for producing aviation screws includes an upper thread rolling plate 2, a fixing block 1, and a lower thread rolling plate 5. The upper and lower ends of the fixed block 1 are provided with multiple limiting holes 6. The lower end of the upper thread rolling plate 2 is provided with multiple upper limit posts 4. The upper end of the lower thread rolling plate 5 is provided with multiple lower limit posts 3. The upper limit posts 4 and the lower limit posts 3 are provided with connecting holes 11. The front wall of the fixed block 1 is provided with multiple long bolts 10. The long bolts 10 are rotatably connected to the connecting holes 11. The tail end of the long bolts 10 is provided with threads 9.

[0018] The upper thread rolling plate 2 and the lower thread rolling plate 5 both have parallel thread rolling grooves 8 on their surfaces. The cross-section of the thread rolling grooves 8 is involute, and the groove width gradually narrows from the inlet to the outlet, improving the forming quality of the thread 9. The upper and lower ends of the fixing block 1 are equipped with sealing gaskets 7, which are made of rubber material. The sealing gaskets 7 improve the sealing performance of the contact surfaces between the upper thread rolling plate 2 and the lower thread rolling plate 5 and the fixing block 1, preventing moisture and dust from entering the interior and preventing internal contamination. The surface of the thread rolling grooves 8 is covered with a hard alloy coating with a thickness of 8-12μm. The hard alloy coating has excellent wear resistance and impact resistance, which can effectively resist the frictional wear of high-strength alloy materials and extend the service life of the thread rolling plate. The surface of the hard alloy coating is provided with a nano-level lubricating film, which further reduces the friction during the thread rolling process, reduces adhesion, and improves the surface smoothness of the thread 9. The upper thread rolling plate 2, the fixing block 1, and the lower thread rolling plate 5 are all made of carbon steel, which improves their strength.

[0019] The working principle of this utility model is as follows: The upper thread rolling plate 2 and the lower thread rolling plate 5 are installed on the upper and lower ends of the fixing block 1, respectively. The upper limit post 4 and the lower limit post 3 are inserted into the corresponding limit holes 6. The long bolts 10 are screwed into the connecting holes 11 to fix the upper thread rolling plate 2 and the lower thread rolling plate 5. The double-sided thread rolling structure improves the efficiency of operation and saves time. The sealing gasket 7 improves the sealing of the contact surface between the upper thread rolling plate 2 and the lower thread rolling plate 5 and the fixing block 1, preventing moisture and dust from entering the interior and preventing internal contamination. The hard alloy coating has excellent wear resistance and impact resistance, which can effectively resist the frictional wear of high-strength alloy materials and extend the service life of the thread rolling plate. A nano-level lubricating film is also coated on the outside of the hard alloy coating to further reduce the friction during the thread rolling process, reduce adhesion, and improve the surface smoothness of the thread 9.

[0020] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A thread rolling dies for manufacturing aircraft screws, comprising an upper thread rolling die (2), a fixing block (1), and a lower thread rolling die (5); Its features are: The fixed block (1) has multiple limiting holes (6) at both the upper and lower ends. The upper thread rolling plate (2) has multiple upper limit posts (4) at its lower end. The lower thread rolling plate (5) has multiple lower limit posts (3) at its upper end. The upper limit posts (4) and lower limit posts (3) are provided with connecting holes (11). The front wall of the fixed block (1) is provided with multiple long bolts (10). The long bolts (10) are rotatably connected to the connecting holes (11). The tail end of the long bolts (10) is provided with threads (9).

2. The thread rolling die for manufacturing aerospace screws according to claim 1, characterized in that: The upper thread rolling plate (2) and the lower thread rolling plate (5) have thread rolling grooves (8) arranged in parallel on their surfaces. The cross-section of the thread rolling grooves (8) is involute, and the groove width gradually narrows from the inlet to the outlet.

3. The thread rolling die for manufacturing aerospace screws according to claim 1, characterized in that: The fixing block (1) is provided with sealing gaskets (7) at both the upper and lower ends, and the sealing gaskets (7) are made of rubber material.

4. The thread rolling die for manufacturing aerospace screws according to claim 2, characterized in that: The surface of the thread rolling groove (8) is covered with a hard alloy coating, and the coating thickness is 8-12μm.

5. The thread rolling die for manufacturing aerospace screws according to claim 4, characterized in that: The surface of the cemented carbide coating is provided with a nanoscale lubricating film.

6. The thread rolling die for manufacturing aerospace screws according to claim 1, characterized in that: The upper thread rolling plate (2), the fixing block (1) and the lower thread rolling plate (5) are all made of carbon steel.

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