FDS hot melting drill screw

Abstract

The utility model relates to the technical field of riveting, and discloses an FDS hot melting drill screw which comprises a screw body, a screw head and a screw cap, and the five-pointed star design of the screw cap can be more stably matched with a bit to smoothly drill the FDS hot melting drill screw into a plate. Meanwhile, when the screw is drilled into a plate, no waste material flies out, and breakage caused by inclination of the screw is avoided; the free end of the screw body is designed to be in a full triangular streamline shape, so that the free end of the screw is firstly drilled into a plate to play a pre-positioning role; due to the design of the annular groove below the screw head, in the screw drilling process, the plate is turned up in the direction opposite to the screw drilling direction and can be absorbed and covered by the groove space below the screw head.

Description

Technical Field

[0001] The utility model relates to the technical field of riveting, in particular to an FDS hot melt drill screw. Background Art

[0002] In today's automotive manufacturing industry, the design of composite materials is increasing. Different materials must be used to firmly and durably fasten sheet metal. Existing self-drilling screws will produce a large amount of iron filings when the screws drill into the metal sheet. These iron filings will be wrapped in the vehicle profile, causing abnormal noise during vehicle driving; and the self-drilling screws need to be drilled into the metal sheet manually, relying entirely on manual positioning and drilling, with poor accuracy; at the same time, the drilling process often has the risk of thread breakage, thread slippage, and head slippage, causing the screw to be damaged. Utility Model Content

[0003] The utility model aims to provide an FDS hot-melt drill screw to solve the problems of the existing self-drilling screws proposed in the above-mentioned background technology. When drilling into metal sheet metal, a large amount of iron filings will fly out. The self-drilling screws need to be drilled into the metal sheet metal manually, and rely entirely on manual positioning and drilling, with poor accuracy. In the drilling process, there are often risks of thread breakage, thread stripping, and head slipping, and the screw being damaged.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] An FDS hot melt drill screw comprises a nail body, wherein the nail body comprises a threaded section and a tip section, wherein the free end of the tip section is in a fully triangular streamlined shape, the threaded section away from the tip section is connected with a nail head, and the nail head is provided with a nail cap, which is in a five-pointed star shape, wherein the five corners of the five-pointed star are all rounded and blunt convex teeth, and the five bottoms thereof are transitionally connected to the corners through circular arcs.

[0006] Furthermore, an annular groove is provided on one side where the nail head is connected to the nail body.

[0007] Furthermore, two-thirds of the nail head end of the nail body is provided with threads as the threaded section, and the remaining one-third is the tip section.

[0008] Furthermore, a transition section is provided between the thread section and the tip section, and the transition section is a smooth cylindrical section, and its diameter is the same as the thread bottom diameter.

[0009] Furthermore, the thread is a triangular thread.

[0010] Furthermore, the top diameter of the free end is 0.4-0.8 mm.

[0011] Preferably, the nail cap is plum blossom-shaped.

[0012] Furthermore, the hot melt drill screw is used to connect and fix the plate.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The five-pointed star design of the nail cap can more stably cooperate with the screwdriver bit to smoothly drill the FDS hot melt drill screw into the plate; at the same time, when the screw is drilled into the plate, no waste will fly out, and the screw will not break due to tilting;

[0015] The full triangular streamlined design of the free end makes the screw more penetrating. At the same time, after the screw contacts the plate, due to the friction between the free end and the plate, the large diameter of the screw triangle squeezes the plate, and the small diameter quickly dissipates heat. At this time, the temperature of the plate rises rapidly and softens, so that the tip of the screw drills into the plate first, which plays a role of pre-positioning and improves the accuracy.

[0016] The annular groove design under the nail head allows the plate to flip up in the opposite direction of the screw drilling during the screw drilling process and be absorbed and covered by the groove space under the nail head;

[0017] This device uses FDS hot melt drill screws. After the FDS hot melt drill screws are drilled into the metal plate, they have high torque strength, will not loosen due to vibration, and do not require anti-loosening treatment, which will not cause abnormal noise during vehicle driving. At the same time, the screws and the plate can be riveted without drilling. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is the front view of the utility model;

[0019] Figure 2 It is the left view of the utility model;

[0020] Figure 3 It is the right view of the utility model;

[0021] In the figure: 1-nail body, 110-threaded section, 120-transition section, 130-tip section, 131-free end, 2-nail head, 21-groove, 3-nail cap, 31-corner, 32-bottom. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] like Figure 1 and 2As shown, an FDS hot melt drill screw comprises a nail body 1, wherein the nail body 1 comprises a threaded section 110 and a tip section 130, wherein a free end 131 of the tip section 130 is in a full triangular streamline shape, and the free end 131 has strong penetrating power. When the free end 131 contacts a plate under high-speed rotation, due to the effect of friction, the triangular large diameter of the screw squeezes the plate, and the small diameter thereof can quickly dissipate heat, thereby rapidly raising the temperature of the plate and softening it, so as to facilitate the free end 131 to drill into the plate; the threaded section 110 away from the tip section 130 is connected with a nail head 2, and a nail cap 3 is arranged on the nail head 2, and the nail cap 3 is in a five-pointed star shape, wherein the five corners 31 of the five-pointed star shape are all rounded and blunt convex teeth, and the five bottoms 32 thereof are transitionally connected with the corners 31 through arcs, and when the screw is hot-melt drilled into the plate at high speed, since the five-pointed star-shaped nail cap 3 and the equipment bit have high matching accuracy, the screw will not be broken due to the inclination of the screw, so that the screw can be drilled into the plate smoothly.

[0024] like Figure 1 As shown, a ring groove 21 is provided on one side where the nail head 2 is connected to the nail body 1 . During the drilling process, the plate is flipped up in the opposite direction of the screw drilling and is absorbed and covered by the space of the groove 21 below the nail head 2 .

[0025] like Figure 1 As shown, two-thirds of the nail body 1 at the nail head 2 end are provided with threads as the threaded section 110 , and the remaining one-third is the tip section 130 .

[0026] like Figure 1 As shown, a transition section 120 is provided between the thread section 110 and the tip section 130 . The transition section 120 is a smooth cylindrical shape, and its diameter is the same as the thread bottom diameter.

[0027] like Figure 1 As shown, the thread is a triangular thread (not shown in the figure), which has the dual functions of self-tapping and locking. During the screw drilling process, it can reduce resistance and produce a thermal effect to soften the plate. At the same time, after cooling, it plays a locking role to prevent the screw from moving.

[0028] like Figure 3 As shown, the top diameter of the free end is 0.4-0.8 mm.

[0029] As a second embodiment of the present utility model, the nail cap 3 is plum blossom shaped.

[0030] In actual production, the hot melt drill screw is used to connect and fix the plate.

[0031] The utility model adopts a fully triangular streamlined design of the free end 131, and utilizes the vertical pressure and drilling speed of the equipment to quickly heat up and soften the plate with respect to the free end 131 of the screw, making drilling easier, and no iron filings fly out during the whole process; at the same time, the plate is squeezed into the thread of the screw to form an interference fit, with high sealing performance, high torque strength, no loosening due to vibration, and no need for anti-loosening treatment; it can also be repeatedly disassembled for easy recycling.

[0032] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An FDS hot melt drill screw, characterized by: The nail body comprises a nail body, wherein the nail body comprises a threaded section and a tip section, wherein the free end of the tip section is in a fully triangular streamlined shape, the threaded section away from the tip section is connected with a nail head, and a nail cap is arranged on the nail head, wherein the nail cap is in a five-pointed star shape, wherein the five corners of the five-pointed star shape are all rounded and blunt convex teeth, and the five bottoms thereof are transitionally connected with the corners through circular arcs.

2. The FDS hot flow drill screw according to claim 1, characterized in that: An annular groove is provided on one side where the nail head is connected to the nail body.

3. The FDS hot flow drill screw according to claim 1, characterized in that: Two-thirds of the nail head end of the nail body is provided with threads as the threaded section, and the remaining one-third is the tip section.

4. The FDS hot flow drill screw according to claim 3, characterized in that: A transition section is provided between the thread section and the tip section. The transition section is in a smooth cylindrical shape, and its diameter is the same as the thread bottom diameter.

5. The FDS hot flow drill screw according to claim 4, characterized in that: The thread is a triangular thread.

6. The FDS hot flow drill screw according to claim 1, characterized in that: The top diameter of the free end is 0.4-0.8 mm.

7. The FDS hot flow drill screw according to claim 1, characterized in that: The nail cap is in a plum blossom shape.

8. The FDS hot flow drill screw according to any one of claims 1 to 6, characterized in that: The hot melt drill screw is used to connect and fix the plates.

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