An FDS hot-melt drilling screw

Abstract

An FDS melt-hardened self-drilling screw, characterized in that it comprises a nail body, the nail body comprising a threaded portion and a tip portion, the free end of the tip portion being in the shape of a complete triangular streamline and the threaded portion being connected to a nail head away from the tip portion; the nail head is provided with a nail cap having the shape of a pentagram, the five corners of the pentagram being rounded and bluntly convex teeth and the five bottom surfaces being connected to the corners by circular arcs in a transition.

Description

Technical area

[0001] The utility model relates to the field of riveting technology, in particular to an FDS healing melt drilling screw. Technology in the background

[0002] In today's automotive industry, which increasingly uses composite materials and requires the use of different materials to firmly and permanently fasten the sheet metal, existing self-drilling screws generate a large amount of iron filings when drilling the screws into the sheet metal, which can get caught in the vehicle profiles, causing rattling when the vehicle is in motion; in addition, the drilled screws must be drilled into the sheet metal by hand, requiring manual positioning and drilling, which is not very precise; at the same time, the drilling process often carries the risk of breaking the threads, slipping the threads and damaging the screw heads. Content of the utility model

[0003] The purpose of this utility model is to provide a FDS melt-melt self-drilling screw to replace the existing self-drilling screw proposed in the above-mentioned background technology. Drilling into the metal sheet will generate a large number of iron filings; the self-drilling screw must be manually drilled into the metal sheet, relying solely on manual positioning and drilling, with poor accuracy. The drilling process often results in broken threads, slipping wires, and the risk of damaging the head of smooth screws.

[0004] To achieve the above-mentioned purpose, the utility model offers the following technical solution: An FDS self-drilling screw comprising a nail body, the nail body comprising a threaded portion and a tip portion, the free end of the tip portion being in the shape of a complete triangular streamline, and the threaded portion connecting to a nail head remote from the tip portion. The nail head is provided with a nail cap in the shape of a pentagram, with the five corners of the pentagram being rounded and bluntly convex teeth, the five undersides of which are connected to the corners by circular arcs in the transition.

[0005] Furthermore, the nail head is provided with an annular groove on the side of the nail body where it is connected to the nail body.

[0006] Furthermore, two-thirds of the nail head end of the nail body is designed as a threaded section and the remaining third as a tip section.

[0007] Furthermore, the threaded portion is provided with a transition portion between the threaded portion and the tip portion, wherein the transition portion is smoothly cylindrical and has the same diameter as the lower diameter of the thread.

[0008] Furthermore, the thread is a triangular thread.

[0009] Furthermore, the upper diameter of the free end is 0.4 to 0.8 mm. The nail cap is preferably plum-shaped.

[0010] Furthermore, the thermally fused drilling screw is used to connect and fix the panel.

[0011] Compared to the state of the art, the utility model has an advantageous effect: The pentagonal design of the nail cap can cooperate more stably with the batch head to ensure the FDS fusion drilling screw drills smoothly into the plate; at the same time, no waste material flies out when the screw is drilled into the plate, and it will not be broken by the tilting of the screw.

[0012] The free end of the full triangular streamline design, so that the screw penetration is stronger, and at the same time in the screw contact with the plate, the free end and plate contact by friction, the screw triangular large diameter extrusion plate, small diameter rapid heat dissipation, at this time the temperature of the plate quickly rises and softens, so that the tip of the screw initially drilled into the plate to play a predetermined role in the position, improve the accuracy;

[0013] The annular groove under the nail head is designed to rotate the board in the opposite direction of the screw hole during screw drilling, which can be absorbed and covered by the groove space under the nail head;

[0014] This device uses FDS-Heil melt-drilling screws, FDS-Heil melt-drilling screws drilled into the metal plate, high torque strength, vibration will not loosen, no need to do anti-loosening treatment, will not cause the vehicle driving process to produce abnormal noise; at the same time, no need to drill holes, you can achieve the riveting of screws and plates. Description of the attached drawings Fig. 1 shows the main view of the utility model; Fig. 2 shows the left view of the utility model; Fig. 3 shows the right view of the utility model;

[0015] In the figures: 1-nail body, 110-threaded section, 120-transition section, 130-point section, 131-free end, 2-nail head, 21-recess, 3-nail cap, 31-corner, 32-bottoms. Detailed description

[0016] The technical solutions in the embodiments of the utility model are described clearly and completely below in conjunction with the accompanying drawings. It is obvious that the described embodiments represent only a portion of the embodiments of the utility model and not all embodiments. Starting from the embodiments of the present utility model, all other embodiments that a person skilled in the art can produce without creative effort fall within the scope of protection of the present utility model.

[0017] As in the Fig. 1 and Fig. As shown in Figure 2, an FDS melt-melt self-drilling screw comprises a nail body 1, the nail body 1 comprising a threaded portion 110 and a tip portion 130, the free end 131 of the tip portion 130 having the shape of a complete triangular streamline. The free end 131 has a strong penetration force, and in the case of high-speed rotation, when the free end 131 contacts the plate, the large triangular diameter of the screw extrudes the plate due to friction, and its small diameter can quickly dissipate heat, thereby rapidly raising and softening the plate temperature and facilitating drilling of the free end 131; the threaded portion 110 remote from the tip portion 130 is connected to a nail head 2, the nail head 2 being provided with a nail cap 3 having the shape of a pentagon.The five corners 31 of the pentagon are all rounded and have blunt convex teeth, and the five bottom surfaces 32 thereof are all connected to the corners 31 in one transition by circular arcs, so that when the screws are thermally drilled into the sheet material at high speed, the screws can be drilled smoothly into the sheet material due to the high precision of coordination between the pentagonal nail cap 3 and the batch head of the device, which will not lead to screw breakage due to the tilting of the screws.

[0018] As in Fig. As shown in Figure 1, the nail head 2 is provided with an annular recess 21 on the side where it is connected to the nail body 1. During the drilling process, the sheet metal is rotated in the opposite direction of the screw hole and is received and covered by the space of the recess 21 below the nail head 2.

[0019] As in Fig. 1, two-thirds of the portion at the end of the nail head 2 of the nail body 1 is provided with a thread as a threaded portion 110, and the remaining third of the portion is a tip portion 130.

[0020] As in Fig. 1, the threaded portion 110 is provided with a transition portion 120 between the threaded portion 110 and the tip portion 130, wherein the transition portion 120 is smoothly cylindrical and has the same diameter as the lower diameter of the thread.

[0021] As in Fig. 1, the thread is a triangular thread (not shown in the figure), which has the dual function of self-tapping and locking, which reduces resistance and creates a thermal effect to soften the plate during drilling of the screw, and at the same time serves as a locking function after cooling to prevent the screw from moving out of position.

[0022] As in Fig. 3, the upper diameter of the free end is 0.4 to 0.8 mm.

[0023] In a second embodiment of the utility model, the nail cap is 3-plum-shaped.

[0024] In practice, the Heil fusion drilling screw is used to connect and fix the plate.

[0025] The utility model uses a triangular streamlined design of the free end 131, which utilizes the vertical pressure and drilling speed of the equipment, so that the free end 131 of the screw is quickly heated and softened to drill the plate, and the drilling is easier, and there are no iron filings flying out during the whole process; at the same time, the plate is pressed into the thread of the screw, forming an interference fit, which has higher sealing performance, high torque strength, no loosening due to vibration, and does not require anti-loose treatment; it can also be repeatedly disassembled and is easy to recycle.

[0026] Although one embodiment of the utility model has been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiment without departing from the principle and spirit of the utility model, and the scope of the utility model is limited by the appended claims and their equivalents.

Claims

[1] An FDS healing enamel drilling screw, characterized by in that it comprises a nail body, the nail body comprising a threaded portion and a tip portion, the free end of the tip portion being in the shape of a complete triangular streamline, and the threaded portion being connected to a nail head away from the tip portion; the nail head being provided with a nail cap having the shape of a pentagram, the five corners of the pentagram being rounded and bluntly convex teeth, and the five undersides being connected to the corners by circular arcs in a transition. [2] An FDS healing fusion drilling screw according to claim 1, characterized by that the nail head is provided with an annular groove on the side where it is connected to the nail body. [3] An FDS healing fusion drilling screw according to claim 1, characterized bythat two-thirds of the nail head end of the nail body is formed as a threaded section and the remaining third of the section is the tip section. [4] An FDS healing fusion drilling screw according to claim 3, characterized by that: the threaded section is provided with a transition section between the threaded section and the tip section and the transition section is smoothly cylindrical and has the same diameter as the lower diameter of the thread. [5] An FDS healing fusion drilling screw according to claim 4, characterized by that: the thread is a triangular thread. [6] An FDS healing fusion drilling screw according to claim 1, characterized by that: the diameter of the upper part of the free end is 0.4 to 0.8 mm. [7] An FDS healing fusion drilling screw according to claim 1, characterized by that: the nail cap is plum-shaped. [8] An FDS healing fusion drilling screw according to one of claims 1 to 6, characterized by that: the Heil enamel drilling screw is used for connecting and fixing panels.

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