A screw which can store cutting material
By incorporating a cutting groove in the screw hole forming section and employing a staged hole enlargement design, the problem of a sharp increase in torque during traditional bolt drilling is solved, thereby reducing equipment load and extending service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU SWANSEA INTELLIGENT EQUIP TECH CO LTD
- Filing Date
- 2025-09-04
- Publication Date
- 2026-07-24
AI Technical Summary
In steel production and processing, traditional self-tapping screws and flow drill screws cannot store cutting material during drilling, resulting in a sharp increase in torque, which leads to equipment wear and increased load on servo motors.
Design a screw that can store cutting material. The screw has a cutting groove on the hole forming section to store metal chips generated during drilling. The hole is enlarged in stages through the pilot section and the main forming section to reduce torque and equipment load.
It reduces the torque required for drilling rotation, avoids equipment wear and increased servo motor load, ensures sheet sealing and axial clamping force, and extends equipment lifespan.
Smart Images
Figure CN224550584U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mechanical parts, and in particular to a screw that can store cutting material. Background Technology
[0002] In steel production and processing, it is generally necessary to drill holes in the first layer of high-strength steel in a multi-layered structure to achieve assembly. However, during the drilling and assembly process using traditional self-tapping screws and flow drill screws, the bolts themselves cannot store the metal chips generated during drilling. This causes the torque to rise sharply during the self-drilling process, leading to deformation and hardening of the metal or material, resulting in wear on the tool bits and increased load on the servo motor. Utility Model Content
[0003] To address the shortcomings of existing technologies, this invention provides a screw that can store cutting material, thereby reducing the torque required for drilling rotation in equipment.
[0004] This utility model is achieved through the following technical solution:
[0005] This utility model provides a screw capable of storing cutting material, comprising:
[0006] End;
[0007] A screw, the top of which is connected to the end, and the screw having a threaded section and a tapered hole forming section sequentially formed along the direction away from the end;
[0008] A cutting groove is formed on the hole forming section near the threaded section.
[0009] Furthermore, the hole forming section sequentially includes a main forming section and a pilot section along the direction away from the end.
[0010] The cutting groove is formed on the main forming section.
[0011] Furthermore, the cutting groove is provided along the extension direction of the main forming section, and the width of the cutting groove along the circumferential direction of the main forming section is 1.15mm to 1.25mm.
[0012] Furthermore, the end of the cutting groove away from the pilot section is connected to the threaded section.
[0013] Furthermore, the cutting groove includes at least two, and the two cutting grooves are evenly distributed circumferentially on the main forming section.
[0014] Furthermore, an annular groove surrounding the screw is formed on the side of the end near the screw.
[0015] Furthermore, the annular groove is an inner cone shape, and its opening diameter gradually decreases from the outside to the inside.
[0016] Furthermore, the inner ring diameter of the annular groove is 6.2mm to 6.6mm, the outer ring diameter is 8.3mm to 8.7mm, and the depth is 1.1mm to 1.5mm.
[0017] Furthermore, a connecting portion is also formed at one end of the screw that connects to the annular groove.
[0018] The connecting portion includes a first connecting portion and a second connecting portion extending in the inward and outward directions of the annular groove.
[0019] The first connecting part is a cylindrical segment, the diameter of which is smaller than the diameter of the threaded segment.
[0020] The second connecting part is a conical segment. One end of the second connecting part is connected to the first connecting part, and the other end is connected to the threaded segment. The diameter of the second connecting part gradually increases in the direction away from the first connecting part.
[0021] Furthermore, a protruding driving portion is formed on the other side of the end opposite to the screw.
[0022] Compared with existing technologies, the advantages of this utility model are:
[0023] The screw of this invention, capable of storing cutting material, has a cutting groove on the hole-forming section near the threaded section. When the screw self-taps through the hole-forming section, the cutting groove reduces the contact area between the hole-forming section and the multi-layered sheet material being drilled. Therefore, the screw of this invention avoids the sheet material from seizing with the screw, thereby reducing the torque required for drilling rotation, preventing wear on the screwdriver bit and increased load on the servo motor, and extending the service life of the equipment.
[0024] The screw of this invention can also store the metal chips generated during the drilling process in the cutting groove on the hole forming section, thereby avoiding the gaps caused by the additive manufacturing in the interlayer of multi-layer plates during installation, ensuring the sealing of the plates and the axial clamping force, and facilitating heat dissipation. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the structure of a screw capable of storing cutting material according to an embodiment of the present invention;
[0026] Figure 2 for Figure 1 Sectional view along line AA in the middle;
[0027] Figure 3 for Figure 1 A bottom view.
[0028] Figure label:
[0029] 100, End; 110, Annular groove; 120, Drive section; 200, Screw; 210, Threaded section; 220, Hole forming section; 221, Main forming section; 2211, Cutting groove; 222, Pilot section; 230, Connecting section; 231, First connecting section; 232, Second connecting section. Detailed Implementation
[0030] The following detailed, non-limiting description of the utility model's technical solution, in conjunction with preferred embodiments and accompanying drawings, is provided. In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.
[0031] like Figure 1 and Figure 2 As shown, this utility model provides a screw capable of storing cutting material, which may include: an end 100 and a screw 200. The top of the screw 200 is connected to the end 100, and a threaded section 210 and a tapered hole-forming section 220 are sequentially formed on the screw 200 in a direction away from the end 100. The threaded section 210 is used to plastically form the thread of the enlarged plate through the rotation of the screw 200. A cutting groove 2211 is formed on the hole-forming section 220 near the threaded section 210.
[0032] Specifically, the screw capable of storing cutting material of this invention has a cutting groove 2211 on the hole forming section 220 near the threaded section 210. When the screw self-taps through the hole forming section 220, the cutting groove 2211 reduces the contact area between the hole forming section 220 and the multi-layered board being drilled. Therefore, the screw of this invention can avoid the board engaging with the screw shank 200, thereby reducing the torque required for drilling rotation, preventing wear on the screwdriver bit and increased load on the servo motor, and extending the service life of the equipment.
[0033] In addition, the screw of this invention can also store the metal chips generated during the drilling process in the cutting groove 2211 on the hole forming section 220, thereby avoiding the gaps caused by the additive manufacturing in the interlayer of multi-layer plates during installation, ensuring the sealing of the plates and the axial clamping force, and facilitating heat dissipation.
[0034] In some embodiments, such as Figure 1 and Figure 2 As shown, the hole forming section 220 includes a main forming section 221 and a pilot section 222 in sequence along the direction away from the end 100, and a cutting groove 2211 is formed on the main forming section 221.
[0035] Specifically, to avoid problems such as "inaccurate positioning," "high forming resistance," and "damage to the connected parts" caused by designing the hole forming section 220 with a single taper or a single diameter, the hole forming section 220 is now sequentially arranged as a main forming section 221 and a pilot section 222 in the direction away from the end 100. It should be noted that the pilot section 222 is the tip of the screw 200. Through the high-speed rotation of the equipment and the friction with the plate, heat energy is generated, which can soften the metal and make it easier for the tip of the screw 200 to penetrate the first layer of the plate to be connected.
[0036] First, the diameter of the pilot section 222 is smaller than that of the main forming section 221 (i.e. smaller than the minor diameter of the thread section 210), and the tapers are different. This allows it to "embed" into the connected part (i.e. the plate) with only a small torque during initial contact, forming a precise "guide hole". The subsequent main forming section 221 expands the hole based on this guide hole, which is equivalent to having a "baseline". This effectively avoids the offset of the hole and ensures the coaxiality of the screw and the mounting hole.
[0037] Secondly, to avoid stress concentration problems caused by "instant cutting" and "excessive extrusion" during drilling of metal, plastic, or wood, the hole forming section 220 is set up with two parts: the main forming section 221 and the pilot section 222. On the one hand, the pilot section 222 can first drill a "small-diameter guide hole", that is, only a small amount of material is removed, the resistance is small, and no stress concentration is generated. On the other hand, the main forming section 221 then gradually expands the hole from the "small-diameter guide hole" to the small diameter of the thread section 210. That is, by "increasing the diameter", "material removal in stages" is achieved, and the total resistance is distributed to two sections to avoid excessive force in a single operation and protect the integrity of the connected parts.
[0038] Finally, the pilot section 222 is responsible for opening the guide hole, while the diameter of the main forming section 221 will gradually increase the guide hole until it is completely matched with the minor diameter of the thread. At the same time, the small cutting edge on its surface (some screws are designed with shallow grooves) corrects the roundness error of the guide hole and removes burrs or excess material from the hole wall, thus ultimately forming a mounting hole with "precise diameter and smooth inner wall", ensuring tight engagement when the thread is screwed in and without additional damage to the connecting plate.
[0039] Preferably, the cutting groove 2211 is provided along the extension direction of the main forming section 221, and the width of the cutting groove 2211 along the circumferential direction of the main forming section 221 is 1.15mm to 1.25mm.
[0040] Preferably, the end of the cutting groove 2211 away from the pilot section 222 is connected to the threaded section 210. This ensures that the diameter of the hole gradually formed by the main forming section 221 matches the diameter of the threaded section 210, avoiding the impact of sandwich additive manufacturing on the reliability of the connection.
[0041] Preferably, the cutting groove 2211 includes at least two, and the two cutting grooves 2211 are evenly distributed circumferentially on the main forming section 221. As an example, when there are two cutting grooves 2211, they are arranged at 180° to each other (i.e., 180° apart) on the surface of the main forming section 221; when there are three cutting grooves 2211, they are arranged at 120° intervals on the surface of the main forming section 221; and so on. This application does not make any specific limitations.
[0042] In some embodiments, such as Figure 2 and Figure 3 As shown, an annular groove 110 surrounding the screw 200 is formed on the side of the end 100 near the screw 200.
[0043] The annular groove 110 is designed to accommodate protrusions caused by plastic deformation of two or more layers of boards after tightening, thus preventing the protrusions from affecting the axial clamping force of the boards.
[0044] Preferably, the annular groove 110 is an inner cone shape, with its opening diameter gradually decreasing from the outside to the inside. This allows it to be adapted to the demolding angle used in cold heading production, facilitating demolding.
[0045] Preferably, the inner ring diameter of the annular groove 110 is 6.2mm to 6.6mm, the outer ring diameter is 8.3mm to 8.7mm, and the depth is 1.1mm to 1.5mm.
[0046] Specifically, the inner ring is the deepest ring inside the annular groove 110, and the outer ring is the outermost ring at the opening of the annular groove 110. The depth is the distance d between the inner ring and the outer ring.
[0047] In some embodiments, such as Figure 1 and Figure 2As shown, a connecting portion 230 is also formed at one end of the screw 200 that connects to the annular groove 110. The connecting portion 230 includes a first connecting portion 231 and a second connecting portion 232 extending inward and outward from the annular groove 110. The first connecting portion 231 is a cylindrical segment with a diameter smaller than that of the threaded segment 210. The second connecting portion 232 is a conical segment, with one end connected to the first connecting portion 231 and the other end connected to the threaded segment 210. The diameter of the second connecting portion 232 gradually increases in the direction away from the first connecting portion 231.
[0048] Specifically, the screw 200 is connected to the bottom of the annular groove 110 via a connecting part 230. The first connecting part 231, located inside the annular groove 110, is columnar and has a diameter smaller than that of the threaded section 210. This increases the space inside the annular groove 110, improves the capacity to accommodate protrusions formed after the sheet metal is tightened, and thus ensures the axial clamping force of the sheet metal during assembly. The second connecting part 232 is used for a smooth transition in diameter between the first connecting part 231 and the threaded section 210, ensuring that the protrusion can smoothly enter the annular groove 110.
[0049] In some embodiments, such as Figure 1 and Figure 2 As shown, a protruding drive portion 120 is formed on the other side of the end 100 opposite to the screw 200.
[0050] Specifically, the drive unit 120 is used to contact the drive head of the device and transmit kinetic energy to the screw 200. Its structure can be polygonal, internal polygonal, or multi-groove type.
[0051] In summary, the screw of this invention can avoid drilling and can be directly used for connecting various materials, high-strength vehicle body connections, blind hole surface connections, and low ductility materials, etc., with a wide range of applications.
[0052] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A screw capable of storing cutting material, characterized in that, include: End (100); A screw (200) is connected to the end (100) at its top. The screw (200) has a threaded section (210) and a tapered hole forming section (220) formed sequentially along the direction away from the end (100). A cutting groove (2211) is formed on the hole forming section (220) near the threaded section (210).
2. The screw capable of storing cutting material according to claim 1, characterized in that, The hole forming section (220) includes, in sequence, a main forming section (221) and a pilot section (222) in the direction away from the end (100). The cutting groove (2211) is formed on the main forming section (221).
3. The screw capable of storing cutting material according to claim 2, characterized in that, The cutting groove (2211) is provided along the extension direction of the main forming section (221), and the width of the cutting groove (2211) along the circumferential direction of the main forming section (221) is 1.15mm to 1.25mm.
4. The screw capable of storing cutting material according to claim 2 or 3, characterized in that, The end of the cutting groove (2211) away from the pilot section (222) is connected to the threaded section (210).
5. The screw capable of storing cutting material according to claim 2 or 3, characterized in that, The cutting groove (2211) includes at least two, and the two cutting grooves (2211) are evenly distributed on the main forming section (221) at circumferential intervals.
6. The screw capable of storing cutting material according to claim 1, characterized in that, An annular groove (110) is formed on the side of the end (100) near the screw (200) to surround the screw (200).
7. The screw capable of storing cutting material according to claim 6, characterized in that, The annular groove (110) is an inner cone shape, and its opening diameter gradually decreases from the outside to the inside.
8. The screw capable of storing cutting material according to claim 7, characterized in that, The inner ring diameter of the annular groove (110) is 6.2mm to 6.6mm, the outer ring diameter is 8.3mm to 8.7mm, and the depth is 1.1mm to 1.5mm.
9. The screw capable of storing cutting material according to claim 7, characterized in that, The end of the screw (200) connected to the annular groove (110) also has a connecting portion (230). The connecting portion (230) includes a first connecting portion (231) and a second connecting portion (232) extending in the inward and outward directions of the annular groove (110). The first connecting part (231) is a cylindrical segment, the diameter of which is smaller than the diameter of the threaded segment (210). The second connecting part (232) is a conical segment. One end of the second connecting part (232) is connected to the first connecting part (231), and the other end is connected to the threaded segment (210). The diameter of the second connecting part (232) gradually increases in the direction away from the first connecting part (231).
10. The screw capable of storing cutting material according to claim 1, characterized in that, A protruding drive portion (120) is formed on the other side of the end (100) opposite to the screw (200).