FDS Melt-Drilling Screws
The FDS fusion drilling screw addresses issues of iron filings, poor accuracy, and screw breakage by using a triangular tip, pentagram cap, and annular groove for precise, chip-free drilling and rivet formation, ensuring stability and noise-free operation.
Patent Information
- Application Number
- JP2025001781U
- Authority / Receiving Office
- JP · JP
- Patent Type
- Utility models
- Current Assignee / Owner
- Priority Date
- 2024-07-12
- Filing Date
- 2025-06-02
- Publication Date
- 2025-07-31
- Estimated Expiration
- 2035-06-02
AI Technical Summary
Existing screws used in the automotive industry face issues such as iron filings flying out during drilling, poor manual alignment accuracy, and frequent screw breakage or slippage due to manual drilling and cutting.
The FDS fusion drilling screw features a screw body with a triangular streamline tip, a pentagram-shaped cap, an annular groove, and a triangular thread, allowing for precise drilling without chips and breakage, and forming a rivet joint without pre-drilling.
The screw ensures stable drilling with no chips, high torque strength, and a rivet joint, preventing loosening and noise, while enhancing precision and eliminating the need for anti-loosening treatments.
Smart Images
Figure 0003252233000001_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of rivets, and particularly to FDS fusion drilling screws.
Background Art
[0002] In the current automotive industry, the use of composite materials in design is increasing continuously, and it is necessary to use strong and durable sheet metal to fasten different materials. For existing screws, when drilling the screw into the metal sheet, a large amount of iron filings will fly out, and these iron filings are wrapped in the profiles of the vehicle, leading to abnormal noises during vehicle driving. In addition, it is necessary to manually drill the screw into the metal sheet, and due to the reliance on manual alignment and drilling, the accuracy is poor. Moreover, during the drilling process, there is often a risk of screw breakage due to screw cutting, slipping, and slippage.
Summary of the Invention
Problems to be Solved by the Invention
[0003] In order to solve the problems of the existing screws proposed in the above background art, such as a large amount of iron filings flying out when drilling the screw into the metal sheet, the need to manually drill the screw into the metal sheet, poor accuracy due to relying on manual alignment and drilling, and the frequent risk of screw breakage due to screw cutting, slipping, and slippage during the drilling process, the present invention aims to propose an FDS fusion drilling screw.
Means for Solving the Problems
[0004] In order to achieve the above object, the present invention proposes the following technical means.
[0005] The FDS fusion drilling screw includes a screw body. The screw body has a screw section and a tip section. The free end of the tip section is in a full triangular streamline shape. The screw section away from the tip section is connected to a screw head, and a screw cap is installed on the screw head. The screw cap is in a pentagram shape, and the five corners of the pentagram are all convex teeth that are rounded and blunt. The five bottoms of the pentagram are all connected to the corners through arcs in a transitionable manner.
[0006] Furthermore, an annular groove is provided on one side of the nail head that connects to the nail body.
[0007] Furthermore, a screw thread is provided on two-thirds of the end of the nail head of the nail body, which portion is the screw step, and the remaining one-third portion is the tip step.
[0008] Furthermore, a transition step is provided between the thread step and the tip step, and the transition step has a smooth cylindrical shape, and the diameter of the transition step is the same as the root diameter of the thread.
[0009] Furthermore, the screw thread is a triangular thread.
[0010] Furthermore, the top diameter of the free end is 0.4 to 0.8 mm.
[0011] Preferably, the nail cap is plum blossom shaped.
[0012] Furthermore, the melt drilling screws are used to connect and fasten plates. [Effects of the Invention]
[0013] Compared with the current technology, the present invention has the following beneficial effects:
[0014] The five-pointed star design of the nail cap allows for a more stable combination with the driver bit, enabling the FDS melt-drilling screw to be smoothly drilled into the plate material. In addition, when the screw is drilled into the plate material, no chips fly out and the screw will not break due to tilting.
[0015] The free end is designed to be fully triangular and streamlined, which increases the penetration force of the screw, and when the free end of the screw comes into contact with the plate, the large diameter of the triangular tip of the screw presses against the plate under the action of friction, while the small diameter quickly dissipates heat, causing the plate to rapidly rise in temperature and soften, allowing the tip of the screw to penetrate into the plate, fulfilling the roles of pre-positioning and improving precision.
[0016] By providing an annular concave groove below the nail head, during the process of drilling a screw into a plate material, the plate material folds out along the opposite direction of the drilling of the screw, and the folded-out plate material is received and wrapped in the concave groove space below the nail head.
[0017] The present invention utilizes an FDS fusion drilling screw. When the FDS fusion drilling screw is drilled into a metal plate material, it has high torque strength, no loosening due to vibration, no need for anti-loosening treatment, and does not cause abnormal noise during vehicle driving. In addition, even without the need to drill holes, it can achieve a rivet joint between the screw and the plate material.
Brief Description of the Drawings
[0018]
Figure 1
Figure 2
Figure 3
Embodiments for Carrying Out the Invention
[0019] In order to more clearly understand the technical problems, technical solutions, and beneficial effects solved by the present invention, next, the present invention will be described in detail and completely in combination with the drawings and embodiments. The embodiments described in this specification are some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative labor are included in the protection scope of the present invention.
[0020] As shown in Figures 1 and 2, the FDS fusion-drilling screw includes a nail body 1 having a threaded section 110 and a tip section 130. The free end 131 of the tip section 130 has a full triangular streamlined shape, which increases the penetrating force of the free end 131. When the free end 131 contacts the plate during high-speed rotation, the large diameter of the triangular tip of the screw presses against the plate under friction, while the small diameter quickly dissipates heat, thereby rapidly increasing the temperature and softening the plate, facilitating the drilling of the screw tip into the plate. The threaded section 110, located away from the tip section 130, is connected to a nail head 2, on which a nail cap 3 is mounted. The nail cap 3 is shaped like a five-pointed star. The five corners 31 of the pentagram are all rounded and blunt, and the five bases 32 of the pentagram are connected to the corners 31 via arcs. When the screw is drilled into the plate material in a high speed heat melting state, the five-pointed star shaped nail cap 3 is precisely matched with the driver bit, so that the screw does not break due to tilting, and the screw can be smoothly drilled into the plate material.
[0021] As shown in Figure 1, a ring-shaped groove is provided on one side of the nail head 2 connected to the nail body 1, so that during the process of drilling the screw into the plate material, the plate material bends out in the opposite direction to the drilling of the screw nail, and the bent out plate material is contained and enclosed in the groove space 21 below the nail head 2.
[0022] As shown in FIG. 1, two-thirds of the end of the nail head 2 of the nail body 1 is provided with threads, which form a threaded section 110 , and the remaining one-third is a tip section 130 .
[0023] As shown in FIG. 1, a transition section 120 is provided between the thread section 110 and the tip section 130. The transition section 120 has a smooth cylindrical shape, and the diameter of the transition section 120 is the same as the root diameter of the thread.
[0024] As shown in FIG. 1, the screw thread is a triangular thread (not shown) that has the dual functions of self-tapping and locking. It reduces resistance during the process of drilling the screw into the plate, allows the plate to be softened by the effect of heat, and also performs a locking function to prevent the screw from slipping out after cooling.
[0025] As shown in FIG. 3, the top diameter of the free end is 0.4 to 0.8 mm.
[0026] As a second embodiment of the present invention, the nail head 3 is in a plum blossom shape.
[0027] In actual production, the molten piercing screw is used for connecting and fixing plates.
[0028] In the present invention, by making the free end 131 into a full triangular streamline shape, the vertical pressure and drilling speed of the equipment are utilized to quickly heat and soften the plate by the free end 131 of the screw, making the piercing easier, and metal chips do not scatter during the whole process. In addition, the plate is pushed into the screw threads of the screw to form an interference fit, having high sealing performance torque strength, no loosening due to vibration, and no need for anti-loosening treatment. Moreover, it can be conveniently removed and reused repeatedly.
[0029] Despite showing and describing embodiments of the present application, those skilled in the art can make various changes, modifications, substitutions, and variations to these embodiments without departing from the principles and spirit of the present application, and it can be understood that the scope of the present application is limited by the claims and their equivalents.
Description of Reference Numerals
[0030] 1 - Nail body; 110 - Screw section; 120 - Transition section; 130 - Tip section; 131 - Free end; 2 - Nail head; 21 - Groove space; 3 - Nail head; 31 - Corner; 32 - Bottom
Claims
1. Including a nail body, the nail body has a threaded section and a tip section, the free end of the tip section is in a full triangular streamline shape, the threaded section away from the tip section is connected to a nail head, a nail cap is installed on the nail head, the nail cap is in a pentagram shape, the five corner parts of the pentagram are all convex teeth that are round and blunt, and the five bottom parts of the pentagram are all connected to the corner parts in a transitionable manner through arcs. An FDS fusion drilling screw characterized by the above.
2. An annular concave groove is provided on one side of the nail head connected to the nail body. The FDS fusion drilling screw according to Claim 1, characterized by the above.
3. A thread is provided on two-thirds of the end side of the nail head of the nail body, this part is the threaded section, and the remaining one-third part is the tip section. The FDS fusion drilling screw according to Claim 1, characterized by the above.
4. A transition section is provided between the threaded section and the tip section, the transition section is in a smooth cylindrical shape, and the diameter of the transition section is the same as the valley diameter of the thread. The FDS fusion drilling screw according to Claim 3, characterized by the above.
5. The thread is a triangular thread. The FDS fusion drilling screw according to Claim 4, characterized by the above.
6. The top diameter of the free end is 0.4 to 0.8 mm. The FDS fusion drilling screw according to Claim 1, characterized by the above.
7. The nail cap is in a plum blossom shape. The FDS fusion drilling screw according to Claim 1, characterized by the above.
8. It is used for the connection and fixation of plates. The FDS fusion drilling screw according to any one of Claims 1 to 6, characterized by the above.