Threaded pulling nail and production method thereof

Abstract

The invention discloses a thread drawing nail and a production method thereof, belongs to the technical field of aviation fasteners, and aims to solve the problem that when an existing thread drawing nail is used, a concave area exists in the rear end of a nail head, the thread drawing nail comprises a core rod (1), and the core rod (1) is sequentially sleeved with a nail sleeve (2), a nail body (3) and a driving nut (4) from front to back. In the process of driving the nut (4) to move forwards relative to the core rod (1), the core rod (1) can be fractured at the neck breaking groove (13) to form a front core rod section (15) and a rear core rod section (16), a rear fracture surface (151) is formed at the rear end of the front core rod section (15), the rear fracture surface (151) is flush with the rear end face (321), and the rear fracture surface (151) and the rear end face (321) are connected to form a complete plane, so that the surface of a machine body can be integrally flat.

Description

Technical Field

[0001] The invention relates to the technical field of aviation fasteners, in particular to a threaded pull-out nail and a production method of the threaded pull-out nail. Background Art

[0002] In aviation and aerospace applications, due to strict weight control, composite materials are often used as the fuselage material to reduce weight. However, installation space is often limited, making it difficult for workers to successfully install the components. In such cases, blind rivets, which are riveted on one side, are often used to connect composite materials and aluminum alloy structures.

[0003] Existing blind rivets, driven by the installation tool, realize the breaking of the broken neck groove, and finally achieve the tightening effect. For example, Chinese patent CN207212884U, published on April 10, 2018, discloses "A new type of controllable broken neck groove threaded blind rivet". Due to the inherent blind rivet structure and installation requirements, after installation, if Figure 1 As shown, the rear end surface of the nail body 3 is not flush with the fracture surface of the core rod 1, that is, a recessed area 34 is left in the rear end of the nail head 32, affecting the overall flatness of the fuselage surface. Summary of the Invention

[0004] In order to solve the problem of the presence of a recessed area in the rear end of the nail head, the present invention provides a threaded pull-out nail and a production method thereof. When the threaded pull-out nail is in use, after the core rod breaks, the rear fracture surface of the core rod is flush with the rear end surface of the nail body, and the rear fracture surface and the rear end surface are connected to form a complete plane, which can make the overall surface of the body flat.

[0005] The technical solution adopted by the embodiment of the present invention to solve the technical problem is:

[0006] A threaded pull-out nail comprises a core rod, wherein a nail sleeve, a nail body and a drive nut are sequentially sleeved on the outside of the core rod from front to back, a broken neck groove is provided on the outer circumference of the core rod, and the nail body is a cylindrical structure, comprising a nail rod portion and a nail head portion arranged in front and back, and the rear end surface of the nail head is directly connected to the inner circumference of the nail body. When the drive nut moves forward relative to the core rod, the core rod can be broken at the broken neck groove to form a front core rod segment and a rear core rod segment, and the rear end of the front core rod segment forms a rear fracture surface, which is flush with the rear end surface, and the rear fracture surface and the rear end surface are connected to form a complete plane.

[0007] A method for producing a threaded screw, comprising the following steps:

[0008] A core rod, a nail sleeve, a nail body and a driving nut are manufactured, and the core rod, the nail sleeve, the nail body and the driving nut are assembled into a threaded pull-out nail, which is the threaded pull-out nail mentioned above.

[0009] The beneficial effects of the embodiments of the present invention are as follows:

[0010] 1. After the core rod breaks, the rear fracture surface of the core rod is flush with the rear end surface of the nail body, and the rear fracture surface and the rear end surface are connected to form a complete plane, so that the overall flatness of the fuselage surface is good.

[0011] 2. There are no grooves and transitions (including chamfer transitions and arc transitions) on the inner edge of the rear end surface, which can improve the tensile performance of the thread tapping nail. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0013] Figure 1 FIG. is a schematic diagram of the use state of a thread tapping nail in the prior art.

[0014] Figure 2 FIG. is a front view schematic diagram of the (convex head type) thread tapping nail of the present invention.

[0015] Figure 3 is along Figure 2 a cross-sectional schematic diagram taken along the A-A direction in

[0016] Figure 4 FIG. is a front view schematic diagram of the (countersunk head type) thread tapping nail of the present invention.

[0017] Figure 5 is along Figure 4 a cross-sectional schematic diagram taken along the B-B direction in

[0018] Figure 6 FIG. is a schematic diagram of the use state of the thread tapping nail of the present invention.

[0019] Figure 7 FIG. is a schematic diagram after the core rod breaks.

[0020] Figure 8 FIG. is a schematic diagram of the nail body.

[0021] Figure 9 is along Figure 7 a schematic diagram taken along the C direction in

[0022] Figure 10 FIG. is a schematic diagram when the core rod is not broken.

[0023] Figure 11 FIG. is a left view schematic diagram of the drive nut.

[0024] Figure 12 FIG. is a cross-sectional schematic diagram of the drive nut.

[0025] The descriptions of the reference numerals are as follows:

[0026] 1. Core rod; 2. Nail sleeve; 3. Nail body; 4. Driving nut; 5. Intermediate sleeve;

[0027] 11. Core head section; 12. First external thread section; 13. Neck-breaking groove; 14. Second external thread section; 15. Front core rod section; 16. Rear core rod section;

[0028] 31. Nail rod part; 32. Nail head part; 33. Inner circumferential surface; 34. Concave area;

[0029] 41. Annular boss; 42. Nut body; 43. Inner large diameter section; 44. Inner small diameter section;

[0030] 151. Rear fracture surface;

[0031] 321. Rear end face;

[0032] 411. Front end face. Detailed implementation manners

[0033] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0034] For the convenience of understanding and description, the following description of the present invention adopts an absolute positional relationship. Without special explanation, the orientation word "upper" herein represents Figure 2 the upper side direction in Figure 2 the orientation word "lower" represents Figure 2 the lower side direction in Figure 2 the orientation word "left" represents the direction perpendicular to Figure 2 the paper surface in Figure 2 and pointing outside the paper surface, the orientation word "right" represents the direction perpendicular to

[0035] such as Figures 2 to 10As shown in the figure, a threaded blind rivet according to an embodiment of the present invention includes a core rod 1. A nail sleeve 2, a nail body 3, and a driving nut 4 are sequentially sleeved on the core rod 1 from front to back. A neck-breaking groove 13 is provided on the outer peripheral surface of the core rod 1. The nail body 3 has a cylindrical structure and includes a nail rod portion 31 and a nail head portion 32 arranged front and back. The rear end surface 321 of the nail head portion 32 is directly connected to the entire inner peripheral surface 33 of the nail body 3. When the driving nut 4 moves forward relative to the core rod 1, the nail body 3 also moves forward relative to the core rod 1. The core rod 1 can break at the neck-breaking groove 13 to form a front core rod section 15 and a rear core rod section 16. The rear end of the front core rod section 15 forms a rear fracture surface 151. The rear fracture surface 151 is flush with the rear end surface 321 (in the same plane), and the rear fracture surface 151 and the rear end surface 321 are connected to form a complete plane.

[0036] In the prior art, after the core rod 1 breaks, a groove (usually a cross-shaped annular groove) is provided on the inner edge of the rear end surface of the nail body 3. The rear end surface of the nail body 3 is not flush with the fracture surface of the core rod 1, that is, a concave area 34 will be left inside the rear end of the nail head portion 32. The inventive point of the present invention is that the rear end surface 321 of the nail head portion 32 is a standard complete circular plane. The inner edge of the rear end surface 321 of the nail head portion 32 is a standard closed circle. There is no any structure on the inner edge of the rear end surface 321 of the nail head portion 32, and there is no groove and transition (including chamfer transition and arc transition) on the inner edge of the rear end surface 321. The inner diameter of the rear end surface 321 of the nail head portion 32 is equal to the outer diameter of the rear fracture surface 151. After the core rod 1 breaks, the rear fracture surface 151 is flush with the rear end surface 321, and the rear fracture surface 151 and the rear end surface 321 are connected to form a standard complete plane, so as to achieve the overall flatness of the fuselage surface to the greatest extent.

[0037] The purpose of the present invention is that, as Figures 6 to 7 shown, after the core rod 1 breaks, the rear fracture surface 151 is flush with the rear end surface 321, and the rear fracture surface 151 and the rear end surface 321 are connected to form a standard complete and defect-free circular plane. However, in the actual use process, the rear fracture surface 151 may be uneven, there may be an annular groove between the rear fracture surface 151 and the rear end surface 321, and there may be a tiny gap between the rear fracture surface 151 and the rear end surface 321 in the front-back direction. But the above contents are all reasonable differences between theory and practice. Similar to that there must be impurities in smelting and errors in measurement.

[0038] In order to make the rear fracture surface 151 as flush as possible with the rear end surface 321, the distance between the rear fracture surface 151 and the rear end surface 321 in the front-back direction can be 0 mm - 0.6 mm. The rear fracture surface 151 may be in front of or behind the rear end surface 321, and the unevenness of the rear fracture surface 151 can also be processed by other grinding means.

[0039] AsFigures 2 to 5 and Figures 11 to 12 As shown in Figures 11 to 12 , the driving nut 4 includes an annular boss 41 and a nut body 42 connected front and back. The annular boss 41 and the nut body 42 are integrally connected. The front end face 411 of the annular boss 41 is a complete circular plane. The rear end face 321 of the nail head 32 is completely attached to the front end face 411 of the annular boss 41. The front end face 411 of the annular boss 41 is perpendicular to the axis of the driving nut 4, and the axis of the driving nut 4 coincides with the axis of the core rod 1.

[0040] The outer diameter of the annular boss 41 is smaller than the outer diameter of the nut body 42, and the outer diameter of the nut body 42 is smaller than the maximum outer diameter of the nail head 32. The threaded blind rivet can be a convex head type threaded blind rivet (as shown in Figures 2 to 3 ) or a countersunk head type threaded blind rivet (as shown in Figures 4 to 5 ). The threaded blind rivet is mainly applied in the fields of aviation and aerospace. The threaded blind rivet can also be called an aviation threaded blind rivet, a aerospace threaded blind rivet or an aviation and aerospace threaded blind rivet. Figures 2 to 3 shown Figures 4 to 5 shown

[0041] The outer surface of the core rod 1 includes a core head section 11, a first external thread section 12 and a second external thread section 14 arranged in sequence from front to back. The necking groove 13 is located between the first external thread section 12 and the second external thread section 14. The outer diameter of the core head section 11 is larger than the major diameter of the first external thread section 12, and the major diameter of the first external thread section 12 is larger than the major diameter of the second external thread section 14. The front end of the necking groove 13 is flush with the rear end of the first external thread section 12. The depth of the necking groove 13 is 30%-40% of the major diameter of the second external thread section 14, so that the rear fracture surface 151 is as flat as possible.

[0042] The core head section 11, the nail sleeve 2, the nail body 3 and the driving nut 4 are connected in sequence. An intermediate sleeve 5 is sleeved between the nail sleeve 2 and the core rod 1. A first internal thread is provided on the inner peripheral surface 33 of the nail body 3, and the first internal thread of the nail body 3 is threadedly connected with the first external thread section 12 in a matching manner.

[0043] As Figures 11 to 12 shown, the inner peripheral surface of the driving nut 4 includes a large inner diameter section 43 and a small inner diameter section 44 arranged front and back. The inner diameter of the large inner diameter section 43 is larger than that of the small inner diameter section 44. The axial length of the large inner diameter section 43 is smaller than the axial length of the small inner diameter section 44. The inner surface of the large inner diameter section 43 is smooth (that is, there is no thread on the inner surface of the large inner diameter section 43). The inner diameter of the large inner diameter section 43 is smaller than the major diameter or the pitch diameter of the first external thread section 12. The inner surface of the small inner diameter section 44 is provided with an internal thread, and the small inner diameter section 44 is threadedly connected with the second external thread section 14. The inner diameter of the large inner diameter section 43 is larger than that of the small inner diameter section 44 to leave a fracture buffer zone when the riveting (core rod 1) breaks, preventing the driving nut 4 from being stuck with the nail body 3.

[0044] The following describes the usage method of the threaded blind rivet (threaded blind rivet for aviation or threaded blind rivet for aviation and aerospace).

[0045] Rely on the driving of the core rod 1 by the riveting tool. The driving nut 4 and the nail body 3 remain stationary. The core head section 11 of the core rod 1 moves towards the direction close to the nail body 3 and the driving nut 4, that is, the core rod 1 moves backward relative to the driving nut 4. The nail sleeve 2 gradually expands and deforms along the taper angle direction of the nail body 3 and contacts the clamping layer surface to form a upset head. In order to prevent the nail body 3 from rotating, the front end face 411 of the driving nut 4 is a rough surface. After the front end face 411 of the driving nut 4 contacts the rear end of the first external thread section 12, continue to tighten the core rod 1. The core rod 1 breaks at the neck-breaking groove 13 to form a front core rod section 15 and a rear core rod section 16. The rear end of the front core rod section 15 forms a rear fracture surface 151. The rear fracture surface 151 is flush with the rear end face 321, and the rear fracture surface 151 and the rear end face 321 are connected to form a complete plane.

[0046] The following introduces a production method of a threaded blind rivet. The production method of the threaded blind rivet includes the following steps:

[0047] Manufacture the core rod 1, the nail sleeve 2, the nail body 3 and the driving nut 4, and assemble the core rod 1, the nail sleeve 2, the nail body 3 and the driving nut 4 into a threaded blind rivet, and the threaded blind rivet is the above-mentioned threaded blind rivet. The specific production steps are as follows:

[0048] The manufacture of the core rod 1 successively includes the following steps:

[0049] Step 1a, blank selection: Select a blank as a GH2132 superalloy wire with a suitable specification and a lubricating coating;

[0050] Step 2a, upset forming: Form the GH2132 superalloy wire into a core rod semi-finished product through a mold of corresponding specification in a cold heading machine; The head, the large and small rod parts, and the R under the head of the core rod are upset formed at one time;

[0051] Step 3a, removing the coating: Put the core rod semi-finished product into a vibrating machine and pickling line to remove surface dirt and the raw material copper plating layer;

[0052] Step 4a, turning: Turn the rod head, determine the length, and prefabricate the neck-breaking groove 13;

[0053] Step 5a, CNC centerless grinding: Grind the outer peripheral surface of the core rod semi-finished product by using a CNC grinding machine;

[0054] Step 6a, thread rolling: Thread roll the outer peripheral surface of the core rod semi-finished product at one time to process the first external thread section 12 and the second external thread section 14;

[0055] Step 7a, cleaning: Put the core rod semi-finished product into an ultrasonic cleaning machine to remove the surface oil contaminants generated due to thread rolling;

[0056] Step 8a, Heat treatment: Place the semi-finished mandrel in a vacuum aging furnace, heat it with the furnace, and perform aging heat treatment. The temperature of the aging heat treatment is 600°C - 720°C, hold for 8h - 16h, and then cool the semi-finished mandrel with the furnace;

[0057] Step 9a, Surface treatment: Perform surface coating of molybdenum disulfide on the semi-finished mandrel on an automatic coating machine, and control the thickness of the molybdenum disulfide coating within the range of 3um - 12um to obtain the finished product of mandrel 1.

[0058] Manufacturing the nail sleeve 2 successively includes the following steps:

[0059] Step 1b, Blank selection: Select a stainless steel tube with appropriate specifications and relatively high dimensional accuracy tolerance (tolerance controlled within ±0.02mm) as the blank;

[0060] Step 2b, Turning: Machine the steps on the inner and outer circumferential surfaces of the nail sleeve 2 to obtain a semi-finished nail sleeve;

[0061] Step 3b, Cleaning: Place the semi-finished nail sleeve in a cleaning device to remove surface dirt;

[0062] Step 4b, Heat treatment: Place the semi-finished nail sleeve in a heat treatment furnace at 950°C - 1100°C for 45 minutes - 60 minutes of heat treatment, and then perform air quenching on the semi-finished nail sleeve;

[0063] Step 5b, Surface treatment: Perform surface molybdenum disulfide coating treatment on the semi-finished nail sleeve to obtain the finished product of nail sleeve 2.

[0064] Manufacturing the nail body 3 successively includes the following steps:

[0065] Step 1c, Blank selection: Select a TC4 titanium alloy coil wire with a coating as the blank;

[0066] Step 2c, Upsetting and forming: Form the TC4 titanium alloy wire into a semi-finished nail body through corresponding dies in a warm upsetting machine; The head, rod, and R under the head are upset and formed in one step;

[0067] Step 3c, Cleaning: Place the semi-finished nail body in a corresponding vibration polishing device to remove surface dirt and the raw material coating generated due to upsetting;

[0068] Step 4c, Turning: Machine the nail head and drill a hole;

[0069] Step 5c, Tapping: Use a tap to machine an internal thread on the semi-finished nail body;

[0070] Step 6c, Heat treatment:

[0071] First heat treatment: subject the semi-finished nail body to solution heat treatment at a temperature of 900°C - 980°C for 30 min - 60 min, and then water-cool the semi-finished nail body;

[0072] Second heat treatment: put the cooled semi-finished nail body into a vacuum aging furnace at 480°C - 580°C for heat preservation for 4 h - 6 h, and then cool the semi-finished nail body in the furnace;

[0073] Step 7c, CNC centerless grinding: put the heat-treated semi-finished nail body into a centerless grinder to grind the outer peripheral surface of the nail rod part 31;

[0074] Step 8c, surface treatment: subject the semi-finished nail body to surface passivation treatment to obtain the finished product of the nail body 3.

[0075] Manufacturing the drive nut 4 successively includes the following steps:

[0076] Step 1d, blank selection: select a hexagonal alloy steel bar with appropriate specifications and quality as the blank;

[0077] Step 2d, machining: cut, drill, and tap the hexagonal alloy steel bar to obtain a semi-finished drive nut;

[0078] Step 3d, heat treatment:

[0079] The first heat treatment adopts solution heat treatment: put the semi-finished drive nut into a vacuum solution furnace at 850°C - 900°C for heat preservation for 45 min - 60 min, and then oil-cool the semi-finished drive nut;

[0080] The second heat treatment adopts tempering treatment: put the semi-finished drive nut into a vacuum furnace at 350°C - 400°C for heat preservation for 2 h - 3 h, and then air-cool the semi-finished drive nut; the hardness of the semi-finished drive nut after tempering treatment is 45HRC - 55HRC;

[0081] Step 4d, surface treatment: subject the semi-finished drive nut to surface nickel plating, zinc plating, or chromium plating treatment to obtain the finished product of the drive nut 4.

[0082] The production method of the screw nail includes the following steps: manufacturing the intermediate sleeve 5;

[0083] Manufacturing the intermediate sleeve 5 successively includes the following steps:

[0084] Step 1e, blank selection: select a polyoxymethylene bar with appropriate specifications and elongation as the blank;

[0085] Step 2e, machining: cut and turn the inner hole of the polyoxymethylene bar to obtain the finished product of the drive nut 4.

[0086] Assemble the core rod 1, the nail sleeve 2, the nail body 3, the drive nut 4 and the intermediate sleeve 5 into a threaded blind rivet.

[0087] As described above, only the specific embodiments of the present invention are provided, and the scope of the invention cannot be limited by them. Therefore, the replacement of equivalent components or equivalent changes and modifications made according to the protection scope of the present invention should still fall within the scope covered by the present invention. In addition, the technical features in the present invention, between technical features, between technical features and technical solutions, between technical solutions, and between embodiments can be freely combined and used.

Claims

1. A threaded blind rivet, characterized in that, The threaded blind rivet includes a core rod (1). A rivet sleeve (2), a nail body (3), and a driving nut (4) are sequentially sleeved on the core rod (1) from front to back. A neck-breaking groove (13) is provided on the outer peripheral surface of the core rod (1). The nail body (3) has a cylindrical structure and includes a nail rod portion (31) and a nail head portion (32) arranged front and back. The rear end face (321) of the nail head portion (32) is directly connected to the entire inner peripheral surface (33) of the nail body (3). When the driving nut (4) moves forward relative to the core rod (1), the core rod (1) can break at the neck-breaking groove (13) to form a front core rod section (15) and a rear core rod section (16). The rear end of the front core rod section (15) forms a rear fracture surface (151), and the rear fracture surface (151) is flush with the rear end face (321). The rear fracture surface (151) and the rear end face (321) are connected to form a complete plane.

2. The thread nail according to claim 1, characterized in that, In the front-back direction, the distance between the rear fracture surface (151) and the rear end face (321) is 0 mm - 0.6 mm.

3. The thread nail according to claim 1, wherein The rear end face (321) of the nail head portion (32) is a complete circular ring plane, and there are no grooves or transitions on the inner edge of the rear end face (321).

4. The thread nail according to claim 1, wherein The driving nut (4) includes an annular boss (41) and a nut body (42) arranged front and back. The front end face (411) of the annular boss (41) is a complete circular ring plane.

5. The thread nail according to claim 4, wherein The rear end face (321) of the nail head portion (32) is completely attached to the front end face (411) of the annular boss (41). The outer diameter of the annular boss (41) is smaller than the outer diameter of the nut body (42), and the outer diameter of the nut body (42) is smaller than the maximum outer diameter of the nail head portion (32).

6. The thread nail according to claim 1, wherein The outer surface of the core rod (1) includes a core head section (11), a first external thread section (12), and a second external thread section (14) arranged in sequence from front to back. The neck-breaking groove (13) is located between the first external thread section (12) and the second external thread section (14). The major diameter of the thread of the first external thread section (12) is larger than the major diameter of the thread of the second external thread section (14). The depth of the neck-breaking groove (13) is 30% - 40% of the major diameter of the thread of the second external thread section (14).

7. The thread nail according to claim 6, characterized in that The nail body (3) is threadedly connected to the first external thread section (12). The inner peripheral surface of the driving nut (4) includes an inner large-diameter section (43) and an inner small-diameter section (44) arranged front and back. The inner diameter of the inner large-diameter section (43) is larger than that of the inner small-diameter section (44). The inner surface of the inner large-diameter section (43) is smooth. The inner diameter of the inner large-diameter section (43) is smaller than the major diameter of the thread of the first external thread section (12). The inner surface of the inner small-diameter section (44) is provided with internal threads, and the inner small-diameter section (44) is threadedly connected to the second external thread section (14).

8. A production method of a threaded blind rivet, characterized in that, The production method of the threaded blind rivet includes the following steps: Manufacture the core rod (1), the rivet sleeve (2), the nail body (3), and the driving nut (4), and assemble the core rod (1), the rivet sleeve (2), the nail body (3), and the driving nut (4) into a threaded blind rivet, and the threaded blind rivet is the threaded blind rivet described in claim 1.

9. According to the production method of the threaded blind rivet described in claim 8, characterized in that The steps for manufacturing the core rod (1) sequentially include the following steps: Step 1a, blank selection: Select the blank as GH2132 superalloy wire with a lubricating coating; Step 2a, upset forming: Form the GH2132 superalloy wire into a core rod semi-finished product through a die of corresponding specifications in a cold heading machine; Step 3a, coating removal: Place the core rod semi-finished product into a vibrator and pickling line to remove surface dirt and the raw material copper plating layer; Step 4a, turning: Turn the rod head, determine the length, and prefabricate a necking groove (13); Step 5a, CNC centerless grinding: Grind the outer peripheral surface of the core rod semi-finished product using a CNC grinding machine; Step 6a, thread rolling: Thread roll the outer peripheral surface of the core rod semi-finished product to process a first external thread section (12) and a second external thread section (14) at one time; Step 7a, cleaning: Place the core rod semi-finished product into an ultrasonic cleaning machine to remove surface oil contaminants generated by thread rolling; Step 8a, heat treatment: Place the core rod semi-finished product into a vacuum aging furnace, heat it with the furnace, and perform aging heat treatment. The temperature of the aging heat treatment is 600°C - 720°C, hold for 8h - 16h, and then cool the core rod semi-finished product with the furnace; Step 9a, surface treatment: Perform surface coating of molybdenum disulfide on the core rod semi-finished product on an automatic coating machine, and control the coating thickness within the range of 3um - 12um to obtain the finished product of the core rod (1); Manufacturing the nail sleeve (2) sequentially includes the following steps: Step 1b, blank selection: Select the blank as a stainless steel pipe; Step 2b, turn the inner peripheral surface and outer peripheral surface of the nail sleeve (2) to obtain a nail sleeve semi-finished product; Step 3b, cleaning: Place the nail sleeve semi-finished product into a cleaning device to remove surface dirt; Step 4b, heat treatment: Place the nail sleeve semi-finished product into a heat treatment furnace at 950°C - 1100°C for 45 minutes - 60 minutes of heat treatment, and then perform air quenching on the nail sleeve semi-finished product; Step 5b, surface treatment: Perform surface molybdenum disulfide coating treatment on the nail sleeve semi-finished product to obtain the finished product of the nail sleeve (2); Manufacturing the nail body (3) sequentially includes the following steps: Step 1c, blank selection: Select the blank as TC4 titanium alloy wire with a coating; Step 2c, upset forming: Form the TC4 titanium alloy wire into a nail body semi-finished product through a corresponding die in a warm heading machine; Step 3c, cleaning: Polish the nail body semi-finished product; Step 4c, turning: Turn the nail head and drill a hole; Step 5c, tapping: Use a tap to process a thread on the nail body semi-finished product; Step 6c, heat treatment: First heat treatment: Perform solution heat treatment on the nail body semi-finished product. The temperature of the solution heat treatment is 900°C - 980°C, hold for 30min - 60min, and then water cool the nail body semi-finished product; Second heat treatment, place the cooled nail body semi-finished product into a vacuum aging furnace at 480°C - 580°C for 4h - 6h of heat preservation, and then cool the nail body semi-finished product with the furnace; Step 7c, CNC centerless grinding: Place the heat-treated nail body semi-finished product into a centerless grinding machine to grind the outer peripheral surface of the nail rod part 31; Step 8c, surface treatment: Perform surface passivation treatment on the nail body semi-finished product to obtain the finished product of the nail body (3); Manufacturing the drive nut (4) sequentially includes the following steps: Step 1d, blank selection: Select a hexagonal alloy steel bar as the blank; Step 2d, machining: Cut, drill, and tap the hexagonal alloy steel bar to obtain a semi-finished driving nut; Step 3d, heat treatment: The first heat treatment uses solution heat treatment: Place the semi-finished driving nut in a vacuum solution furnace at 850°C - 900°C and hold for 45 min - 60 min, then oil cool the semi-finished driving nut; The second heat treatment uses tempering treatment: Place the semi-finished driving nut in a vacuum furnace at 350°C - 400°C and hold for 2 h - 3 h, and then air cool the semi-finished driving nut; Step 4d, surface treatment: Perform surface nickel plating, zinc plating, or chromium plating on the semi-finished driving nut to obtain the finished product of the driving nut (4).

10. The production method of the screw nail according to claim 8, characterized in that, The production method of the threaded nail includes the following steps: manufacturing an intermediate sleeve (5); Manufacturing the intermediate sleeve (5) sequentially includes the following steps: Step 1e, blank selection: Select a polyoxymethylene bar as the blank; Step 2e, machining: Cut and turn the polyoxymethylene bar to obtain the finished product of the driving nut (4).

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