High-strength stainless steel self-tapping composite screw

Abstract

The utility model discloses a high-strength stainless steel self-tapping composite screw, which relates to the technical field of self-tapping screws and comprises a stainless steel rod body, the outer wall of the stainless steel rod body is fixedly connected with threads, the bottom end of the stainless steel rod body is fixedly connected with a self-tapping screw head, and the outer wall of the upper part of the self-tapping screw head is fixedly connected with a side cutting block. The self-tapping screw comprises a stainless steel rod body, heat dissipation holes are formed in the stainless steel rod body, cutting edges are formed in the outer walls of the two sides of the self-tapping screw head, flow guide holes are formed in the outer walls of the cutting edges in a penetrating mode, and flow guide grooves are formed in the stainless steel rod body. Heat generated by friction of the self-tapping screw head in the continuous drilling process can be rapidly dissipated through flowing air, the high temperature influence caused by heat accumulation at the self-tapping screw head is effectively avoided, the whole self-tapping screw head is made of stainless steel materials, the high strength and toughness of the whole self-tapping screw head are guaranteed, and the connection reliability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of self-tapping screws, in particular to a high-strength stainless steel self-tapping composite screw. Background Art

[0002] Self-tapping screws are screws with a drill bit. Their threads can tap out matching internal threads on the material being fastened, thereby connecting two or more parts together. Unlike ordinary screws, which require internal threads to be pre-processed on the connecting material, self-tapping screws simplify this process. Stainless steel itself has good corrosion resistance and can be used for a long time in harsh environments such as humidity, acid and alkali without rusting. This makes stainless steel self-tapping screws widely used in outdoor construction, decoration, furniture and other fields.

[0003] However, in the prior art, when existing self-tapping bolts are quickly installed using high-speed equipment such as power tools, the contact frequency and speed between the screw head and the connected material increase, and the heat generated by friction has no time to dissipate, causing the temperature of the screw head to rise rapidly, reducing the strength and toughness of the stainless steel screw, making the screw more likely to deform or even break when subjected to external force, thereby affecting the reliability of the connection. Utility Model Content

[0004] The purpose of the utility model is to solve the problem that in the existing self-tapping bolts, when they are quickly installed using high-speed equipment such as electric tools, the contact frequency and speed between the screw head and the connected material increase, the heat generated by friction has no time to dissipate, resulting in a rapid increase in the temperature of the screw head, which reduces the strength and toughness of the stainless steel screw, making the screw more likely to deform or even break when subjected to external force, thereby affecting the reliability of the connection. The utility model proposes a high-strength stainless steel self-tapping composite screw.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solution: a high-strength stainless steel self-drilling composite screw, comprising a stainless steel rod body, the outer wall of the stainless steel rod body is fixedly connected with a thread, the bottom end of the stainless steel rod body is fixedly connected with a self-drilling screw head, the upper outer wall of the self-drilling screw head is fixedly connected with a side cutting block, the outer walls on both sides of the self-drilling screw head are provided with cutting edges, the outer walls of the cutting edges are penetrated with a guide hole, the interior of the stainless steel rod body is provided with a guide groove, the interior of the guide hole is connected with the interior of the guide groove, the upper outer wall of the stainless steel rod body is penetrated with a heat dissipation hole, the interior of the heat dissipation hole is connected with the interior of the guide groove.

[0006] Preferably, a baffle is fixedly connected to the top surface of the stainless steel rod, a transition cone is fixedly connected between the top outer wall of the stainless steel rod and the bottom surface of the baffle, and the transition cone is sleeved on the outer wall of the stainless steel rod.

[0007] Preferably, the heat dissipation holes are opened through the outer wall of the transition cone.

[0008] Preferably, a non-slip washer is fixedly connected to the bottom surface of the baffle, and the non-slip washer is sleeved on the outside of the transition cone.

[0009] Preferably, a hexagonal head is fixedly connected to the top surface of the baffle.

[0010] Compared with the prior art, the advantages and positive effects of the present invention are:

[0011] 1. In the present invention, the external air is connected to the cutting edge by setting the guide holes, heat dissipation holes and guide grooves, so that the heat generated by the friction of the self-tapping screw head during continuous drilling can be quickly dissipated through the flowing air, effectively avoiding the accumulation of heat at the self-tapping screw head and causing high temperature effects. In combination with the overall use of stainless steel material, the overall high strength and toughness of the utility model are guaranteed, and the connection reliability is improved.

[0012] 2. In the present invention, the rotating self-tapping screw head is used to drill the mounting surface and the cutting edge is used to automatically discharge the chips. As the self-tapping screw head drills deeper, the side cutting block is used to scrape the drilled hole surface and guide the thread to screw inward, so that the present invention can stably apply vertical force, which facilitates better penetration of the thread into the hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The utility model provides a three-dimensional structural diagram of a high-strength stainless steel self-drilling composite screw;

[0014] Figure 2 This utility model proposes a high-strength stainless steel self-drilling composite screw Figure 1 A magnified view of the structure at center A;

[0015] Figure 3 This utility model provides a structural schematic diagram of a transition cone of a high-strength stainless steel self-drilling composite screw;

[0016] Figure 4 The utility model provides a schematic diagram of the internal structure of a high-strength stainless steel self-drilling composite screw.

[0017] Legend: 1. Stainless steel rod; 2. Thread; 3. Self-tapping screw head; 4. Baffle; 5. Hexagonal head; 6. Side cutting block; 7. Cutting edge; 8. Diversion hole; 9. Transition cone; 10. Heat dissipation hole; 11. Anti-slip washer; 12. Diversion groove. DETAILED DESCRIPTION

[0018] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0019] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0020] Example 1: Figure 1 - Figure 4 As shown, the utility model provides a high-strength stainless steel self-drilling composite screw, including a stainless steel rod body 1, the outer wall of the stainless steel rod body 1 is fixedly connected with a thread 2, the bottom end of the stainless steel rod body 1 is fixedly connected with a self-drilling screw head 3, the upper outer wall of the self-drilling screw head 3 is fixedly connected with a side cutting block 6, the outer walls on both sides of the self-drilling screw head 3 are provided with cutting edges 7, the outer wall of the cutting edge 7 is penetrated with a guide hole 8, the interior of the stainless steel rod body 1 is provided with a guide groove 12, the interior of the guide hole 8 is connected with the interior of the guide groove 12, the upper outer wall of the stainless steel rod body 1 is penetrated with a heat dissipation hole 10, the interior of the heat dissipation hole 10 is connected with the interior of the guide groove 12.

[0021] The following is a detailed description of the specific settings and functions of this embodiment. By using an electric wrench to drive the utility model to rotate and apply pressure, the rotating self-tapping screw head 3 is used to drill the installation surface and cooperate with the cutting edge 7 to automatically discharge the chips. As the self-tapping screw head 3 drills deeper, the side cutting block 6 is used to scrape the drilled surface, and the thread 2 is guided to screw inward, so that the utility model can stably apply vertical force, which is convenient for the thread 2 to better penetrate into the hole. The external air is connected to the cutting edge 7 through the setting of the guide hole 8, the heat dissipation hole 10 and the guide groove 12, so that the heat generated by the friction of the self-tapping screw head 3 during continuous drilling can be quickly dissipated through the flowing air, effectively avoiding the accumulation of heat in the self-tapping screw head 3 and causing high temperature effects, ensuring the overall strength and toughness of the utility model, and improving the connection reliability.

[0022] Example 2: Figure 1 - Figure 4 As shown, the top surface of the stainless steel rod body 1 is fixedly connected to a baffle 4, a transition cone 9 is fixedly connected between the top outer wall of the stainless steel rod body 1 and the bottom surface of the baffle 4, the transition cone 9 is sleeved on the outer wall of the stainless steel rod body 1, and the heat dissipation hole 10 is opened through the outer wall of the transition cone 9, the bottom surface of the baffle 4 is fixedly connected to a non-slip washer 11, the non-slip washer 11 is sleeved on the outside of the transition cone 9, and the top surface of the baffle 4 is fixedly connected to a hexagonal head 5.

[0023] The effect achieved by the entire embodiment is that the utility model is connected to the electric wrench through the hexagonal head 5, the self-tapping screw head 3 is aligned with the installation position, the electric wrench is used to drive the utility model to rotate and apply pressure to perform self-tapping screwing, the stress is gradually transitioned by the setting of the transition cone 9 to avoid stress concentration, and the anti-slip washer 11 is provided to make the utility model pressed against the connection surface after connection to avoid the utility model from rotating and loosening.

[0024] The usage method and working principle of this device: When in use, the user connects the utility model to the electric wrench through the hexagonal head 5, aligns the self-tapping screw head 3 with the installation position, uses the electric wrench to drive the utility model to rotate and apply pressure, and uses the rotating self-tapping screw head 3 to drill the installation surface and cooperate with the cutting edge 7 to automatically discharge the chips. As the self-tapping screw head 3 drills deeper, the side cutting block 6 is used to scrape the drilled surface, and guide the thread 2 to screw in the inner control, so that the utility model can stably apply vertical force, which is convenient for the thread 2 to better penetrate into the hole, and the external air is connected to the cutting edge 7 through the setting of the guide hole 8, so that the heat generated by the friction of the self-tapping screw head 3 during continuous drilling can be quickly dissipated, effectively avoiding the accumulation of heat in the self-tapping screw head 3 and causing high temperature effects, ensuring the overall strength and toughness of the utility model, and improving the connection reliability.

[0025] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any other form. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification, equivalent change and modification of the above embodiment made according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A high-strength stainless steel self-drilling composite screw, comprising a stainless steel rod (1), characterized in that: The outer wall of the stainless steel rod body (1) is fixedly connected with a thread (2), the bottom end of the stainless steel rod body (1) is fixedly connected with a self-tapping screw head (3), the upper outer wall of the self-tapping screw head (3) is fixedly connected with a side cut block (6), the outer walls of both sides of the self-tapping screw head (3) are provided with cutting edges (7), the outer wall of the cutting edge (7) is penetrated with a guide hole (8), the interior of the stainless steel rod body (1) is provided with a guide groove (12), the interior of the guide hole (8) is communicated with the interior of the guide groove (12), the upper outer wall of the stainless steel rod body (1) is penetrated with a heat dissipation hole (10), the interior of the heat dissipation hole (10) is communicated with the interior of the guide groove (12).

2. The high-strength stainless steel self-drilling composite screw according to claim 1, characterized in that: The top surface of the stainless steel rod body (1) is fixedly connected to a baffle (4), a transition cone (9) is fixedly connected between the top outer wall of the stainless steel rod body (1) and the bottom surface of the baffle (4), and the transition cone (9) is sleeved on the outer wall of the stainless steel rod body (1).

3. The high-strength stainless steel self-drilling composite screw according to claim 2, characterized in that: The heat dissipation holes (10) are formed through the outer wall of the transition cone (9).

4. The high-strength stainless steel self-drilling composite screw according to claim 3, characterized in that: The bottom surface of the baffle (4) is fixedly connected with an anti-skid washer (11), and the anti-skid washer (11) is sleeved on the outside of the transition cone (9).

5. The high-strength stainless steel self-drilling composite screw according to claim 4, characterized in that: A hexagonal head (5) is fixedly connected to the top surface of the baffle (4).

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