High-drilling-speed dry wall nail

Abstract

The utility model discloses a high drilling speed dry wall nail which comprises a nail head, a nail body and a nail point, the surface of the nail body is provided with a double-line fine thread, the end portion of the nail point is of a flat end face structure or an inclined end face structure, drilling precision and efficiency are improved, drilling torque is evenly distributed, and the risk of tip breaking is greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to fastener technical field, concretely is a high drilling speed dry wall nail. BACKGROUND

[0002] Dry wall nail as the key fastener in the field of building and decoration is widely used in the fixation of materials such as gypsum board and light steel keel. Traditional dry wall nails mostly adopt conical nail tip and single thread design, which can meet the basic installation requirements, but significant defects are exposed in high-density material (such as hard gypsum board and composite metal frame) construction: first, the initial contact area of the conical nail tip is small, and it is easy to slip and deviate when drilling, resulting in low drilling efficiency; second, the thread distribution is asymmetric or the tooth depth is constant, which generates radial eccentric force during drilling, aggravating the risk of nail body shaking and even breaking; third, the nail tip strength is insufficient, and the tip breaking problem frequently occurs in hard materials, affecting the continuity of construction.

[0003] Existing improvement schemes attempt to alleviate the above problems through structural optimization, for example:

[0004] The patent shown in CN220248601U improves the installation stability by adding a connecting plate and a spring assembly, but the additional structure increases manufacturing cost, and the core problem of nail tip damage is not solved;

[0005] The patent shown in CN204878210U adopts double-thread fine thread design to improve the drilling speed, but the asymmetric distribution of the thread starting point causes unbalanced lateral force during drilling, aggravating the nail body deviation;

[0006] The patent shown in CN205064519U enhances the rust resistance through phosphating treatment, but the nail tip still uses the traditional conical structure, which cannot adapt to the mechanical load of high-density materials.

[0007] Although the above schemes partially optimize the performance of dry wall nails, they do not systematically solve the synergistic contradiction of drilling speed, strength, and stability, especially in high-strength construction scenarios, existing dry wall nails still face technical bottlenecks such as rapid drilling speed decay, high tip breaking rate, and insufficient installation precision. Therefore, there is an urgent need for a dry wall nail structure design that combines efficient drilling, anti-breaking, and dynamic stability to break through the limitations of traditional technology. INVENTION CONTENTS

[0008] To solve the above technical problems, the utility model relates to a high drilling speed dry wall nail, which is simple and reliable, effectively solves the above technical problems, and is suitable for popularization and use. To achieve the above purpose, the utility model realizes the following technical scheme:

[0009] A high drilling speed dry wall nail, comprising a nail head, a nail body, and a nail tip, wherein the surface of the nail body is provided with double-thread fine thread, and the end of the nail tip is a flat end face structure or an inclined end face structure.

[0010] As a preferred solution of the above solution, the starting points of the double thread fine thread are symmetrically distributed along the nail body axis, and the ending points of the helical paths of the two threads are symmetrically terminated at the end face position of the nail tip at the same time.

[0011] As a preferred solution of the above solution, the outer diameter size of the nail tip region is 0.15mm to 0.35mm.

[0012] As a preferred solution of the above solution, when the nail tip is an inclined end face structure, the included angle α between the end face and the horizontal plane is 5° to 60°.

[0013] As a preferred solution of the above solution, the thread depth of the double thread fine thread gradually decreases when extending from one end of the nail body to the end of the nail tip, and the thread depth in the nail body region is 0.6mm to 0.75mm, and the thread depth at a distance of 0.6mm from the end of the nail tip is 0.15mm to 0.25mm.

[0014] As a preferred solution of the above solution, the double thread fine thread forms double independent helical cutting edges at the end of the nail tip, and the extension direction of the cutting edges is consistent with the helical rise angle of the thread.

[0015] As a preferred solution of the above solution, the transition region between the helical cutting edge and the adjacent thread tooth type is a continuous smooth curved surface.

[0016] As a preferred solution of the above solution, the end edge of the inclined end face structure forms an annular chamfer.

[0017] As a preferred solution of the above solution, the pitch of the double thread fine thread increases from the end of the nail tip to the nail head.

[0018] Compared with the prior art, the utility model has the advantages of innovative nail tip structure, symmetrical distribution of double thread fine thread and dynamic optimization of parameters, systematic breakthrough of the technical bottleneck of traditional dry wall nails in high-density material construction, significant reduction of drilling resistance and inhibition of slipping and deviation based on platform or inclined end face nail tip design, uniform distribution of drilling torque by combining the symmetrical distribution and thread depth gradient decreasing characteristics of double thread fine thread, and significant reduction of broken tip risk; the double independent helical cutting edges formed by the cross section position improve drilling accuracy and cutting efficiency, and the drilling speed and fixing stability are simultaneously optimized by the dynamic increasing design of the pitch, so that the pull-out force is significantly enhanced; the construction efficiency and economy are improved, and an efficient, stable and long-life fastening solution is provided for high-density and composite materials. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a high drilling speed dry wall nail top view schematic diagram of the utility model;

[0020] Figure 2 is a high drilling speed dry wall nail main view schematic diagram of the utility model;

[0021] Figure 3 is a high drilling speed dry wall nail nail tip partial enlarged three-dimensional schematic diagram of the utility model;

[0022] Figure 4 is a high drilling speed dry wall nail main view schematic diagram of the utility model;

[0023] Figure 5 is a high drilling speed dry wall nail nail tip partial enlarged two-dimensional schematic diagram of the utility model;

[0024] Figure 6 is a high drilling speed dry wall nail nail tip partial enlarged three-dimensional schematic diagram of the utility model;

[0025] Figure 7 is a high drilling speed dry wall nail drilling speed distribution diagram of the utility model;

[0026] Figure 8 is a high drilling speed dry wall nail drilling speed distribution diagram of the utility model;

[0027] Figure 9 is a high drilling speed dry wall nail drilling speed distribution diagram of the utility model. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the present application more clear, the technical scheme in the embodiment will be described clearly and completely in the following with the drawings in the embodiment, however, the following specific embodiment and embodiment are only for the purpose of illustration, and are not limited to the present application.

[0029] In the description of the utility model, it is understood that the orientation or position relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the drawings shown, and is only for the convenience of describing the utility model, and is not indicative or implied that the device or element indicated must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. Figure 1

[0030] In the description of the present application, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicative or implied of relative importance or implied indication of the number of indicated technical features.

[0031] ​In the utility model, unless another definite provision and limitation, first feature is on second feature " on " or " under " can be first and second feature direct contact, or first and second feature indirectly contact through intermediate medium. Moreover, first feature is on second feature " above " " upper " and " above " can be first feature is on second feature directly above or obliquely above, or just indicate first feature horizontal height is higher than second feature. First feature is on second feature " below " " below " and " below " can be first feature is on second feature directly below or obliquely below, or just indicate first feature horizontal height is less than second feature.

[0032] Embodiment one

[0033] In order to solve the above technical problems, as Figures 1-3 The utility model discloses a high drilling speed dry wall nail, the size specification is the rod diameter 3.5mm, the whole total length 25mm, its structure includes the nail head 1, the nail body 2 and the nail tip 3, the nail body 2 surface is equipped with double line fine thread 6, the end of nail tip 3 is flat end face structure 4, and the section is circular, that is, the end of nail tip 3 is circular platform structure, and the diameter is 0.2-0.3mm, which can increase the initial contact area, reduce the unit area pressure, inhibit the drilling slip, balance the sharpness and the strength, avoid the brittle fracture risk caused by the traditional sharp head due to too thin, the perpendicularity deviation is less than or equal to 0.03mm, ensures that the drilling force is evenly transmitted along the axis, reduces the eccentric moment, and improves the drilling straightness.

[0034] The starting point of the double line fine thread 6 is symmetrically distributed along the axis of the nail body 2 by 180°, and the end points of the two thread spiral paths are symmetrically terminated at the same circumferential position of the end of the nail tip 3, thereby eliminating the asymmetric radial force and solving the nail body 2 deviation problem caused by the traditional thread layout. The double line fine thread 6 forms double independent spiral cutting edges at the end of the nail tip 3, and the extension direction of the cutting edges is consistent with the thread spiral angle. This design enables the double cutting points to be synchronously stressed during drilling, and the setting of the double cutting points makes the cutting force distribution more reasonable, reduces the stress of a single cutting point, reduces the risk of nail breakage during drilling, and improves the service life and reliability of the nail.

[0035] The thread depth of the double line fine thread 6 gradually decreases when extending from one end of the nail body 2 to the end of the nail tip 3, the thread depth in the main body region of the nail body 2 is 0.67mm, and the thread depth decreases to 0.16mm at a position 0.6mm away from the end of the nail tip 3, thereby realizing gradual release of drilling resistance, reducing peak pressure, avoiding problems such as drilling difficulty or nail breakage caused by sudden increase of resistance, and making the drilling process more stable and smooth.

[0036] In addition, preferably, the surface of the nail tip 3 is plated with a zinc-nickel alloy layer, the friction coefficient is reduced by 15%, the wear resistance is improved by 50%, and surface wear under high load is inhibited.

[0037] Further preferably in the embodiment, the transition area between the spiral cutting edge and the adjacent thread form is a continuous smooth curved surface.

[0038] The drilling speed test conditions are as follows: the test equipment is a TW-003 screw tap speed machine, the load is 10.5 kg, the drilling speed is 2200 r / min, the test material is a thin steel strip, the steel strip material is Q235, the thickness is 0.6 mm, the drilling speed is the time required for the dry wall nail to drill through the thin steel strip by 15 mm, 50 dry wall nails with pointed tips are selected as the control experiment, and the experimental results are shown in Figure 7 、 8 It can be seen from the figure that the drilling speed of the dry wall nail of the embodiment is between 0.22-0.3 s, and compared with the comparative sample, the efficiency of the dry wall nail designed in the embodiment is significantly improved.

[0039] In addition, the broken tip rate and the pull-out force test show that the broken tip rate of the dry wall nail of the utility model is 0.4% after drilling 1000 times, and the comparative group is 6.2%, the pull-out force is 1180-1250 N, and the comparative group is 750-820 N. Obviously, the high drilling speed dry wall nail of the utility model has stronger grabbing force and fixing effect in the material, can effectively resist the pull-out effect of external force, and at the same time ensures the stability and reliability of the nail in the use process.

[0040] Embodiment Two

[0041] Different from the above embodiment, as shown in Figures 4-6 , the end of the nail tip 3 in the embodiment is an inclined end surface structure 5, and the cross section is approximately circular, that is, the end of the nail tip 3 is an inclined circular truncated cone structure, and the included angle a between the end surface and the horizontal plane can be 5° to 60°, and at the same time, the inclined angle is preferably 15° to 45°, forming a natural guide angle, so that the contact point of the nail tip 3 with the material is moved forward in the initial stage of drilling, reducing the vertical resistance component, which helps the cutting edge to better adapt to the internal structure of the material during drilling, reduces friction and resistance in the cutting process, and makes the cutting more smooth, further improves the cutting efficiency, and in addition, this structure is particularly suitable for the layered penetration requirement of composite materials (such as gypsum board + light steel keel), and the angle design balances the sharpness and structural strength. Too small angle is easy to cause insufficient guiding effect, and too large angle increases the risk of edge stress concentration.

[0042] As shown in Figure 9 , 50 high drilling speed dry wall nails of this type are also selected for testing, and the experimental results show that the drilling speed performance is very good, and the time required for drilling through the specified thickness material is concentrated between 0.18-0.28 s, which is much lower than the drilling speed of the dry wall nail with a pointed tip, and also higher than the drilling speed of the flat head dry wall nail in embodiment one, which fully demonstrates the significant advantage of the dry wall nail in the drilling speed performance of the embodiment.

[0043] On the basis of the above-mentioned embodiment, this embodiment is further improved, the end edge of the inclined end face structure 5 forms an annular chamfer, which can make the edge of the nail tip 3 more smooth, reduce the frictional resistance between the edge and the material during drilling, and reduce the force required for drilling.

[0044] On the basis of the above-mentioned embodiment, this embodiment is further improved, the pitch of the double thread fine thread 6 increases from the end of the nail tip 3 to the direction of the nail head 1, optimizes the cutting chip discharge efficiency, reduces the risk of jamming, adapts to high-speed continuous operation, the tooth depth gradient and the pitch gradient are respectively aimed at the resistance release and the balance of chip removal and engagement, dynamically match the material characteristics, and realize the synchronous improvement of the drilling speed and the fixing strength.

[0045] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

Claims

1. A high-drill-speed dry wall screw, characterized in that: It includes a nail head, a nail body, and a nail tip. The surface of the nail body is provided with a double-threaded fine thread, and the end of the nail tip is a flat end face structure or an inclined end face structure.

2. The high-drill-rate dry wall screw according to claim 1, characterized in that: The starting points of the double-thread fine-pitch thread are symmetrically distributed along the axis of the nail body, and the helical paths of the two threads simultaneously and symmetrically terminate at the end face of the nail tip.

3. The high-drill-speed dry wall screw according to claim 1, characterized in that: The outer diameter of the nail tip area is 0.15 mm to 0.35 mm.

4. A high-drill-speed dry wall screw according to claim 1, characterized in that: When the nail tip has an inclined end face structure, the angle α between its end face and the horizontal plane is 5° to 60°.

5. A high-drill-speed dry wall screw according to claim 1, characterized in that: The depth of the double-thread fine thread gradually decreases as it extends from one end of the nail body towards the tip. The depth in the nail body area is 0.6 mm to 0.75 mm, and the depth at a distance of 0.6 mm from the tip is 0.15 mm to 0.25 mm.

6. A high-drill-speed dry wall screw according to claim 1, characterized in that: The double-thread fine thread forms two independent helical cutting edges at the tip of the thread, and the extension direction of the cutting edges is consistent with the helix angle of the thread.

7. A high-drill-speed dry wall screw according to claim 6, characterized in that: The transition area between the helical cutting edge and the adjacent thread profile is a continuous and smooth curved surface.

8. A high-drill-speed dry wall screw according to claim 1, characterized in that: The end edge of the inclined end face structure forms a ring-shaped chamfer.

9. A high-drill-speed dry wall screw according to claim 1, characterized in that: The pitch of the double-thread fine thread increases from the tip of the nail towards the head.

Images