Three-blade efficient drilling wood drill and preparation method thereof

Abstract

The invention belongs to the technical field of flat drills, and discloses a three-blade efficient drilling wood drill and a manufacturing method thereof.The wood drill comprises a rod body, three blade plates are fixedly connected to the upper end of the rod body, the three blade plates are distributed in a circular equidistant array mode, and protruding blade heads are arranged on the sides, away from the rod body, of the tops of the blade plates; a transverse cutting edge is formed in the top of the blade plate, and a polishing cutting edge is formed in the side, away from the rod body, of the blade plate. By means of the three blade plates which are distributed in a circular equidistant array mode, cutting contact points are increased, the protruding blade heads at the tops of the blade plates are matched to rapidly pierce the surface layer of wood, the transverse cutting effect of the transverse cutting edges is achieved, the drilling time is greatly shortened, the positioning head arranged on the cone is matched with tapping threads, accurate positioning is achieved, slipping is not prone to occurring, and drilling deviation is avoided; the three blade plates are uniformly stressed, and the polishing effect of the polishing cutting edges on the sides, away from the rod body, of the blade plates on the hole wall is combined, so that burrs are reduced, and the drilling roundness and the surface smoothness are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flat drill, in particular to a three-blade high-efficiency wood drill and a preparation method thereof. BACKGROUND

[0002] At present, a wood flat drill structure with the publication number CN221583945U is disclosed, which comprises a handle part and a flat blade part formed in the front part of the handle part; characterized in that: a first chamfer is arranged between the first shoulder part and the first side part, and a second chamfer is arranged between the second shoulder part and the second side part; by arranging the chamfer structure at the shoulder position of the flat drill, the chamfer is formed at the edge position when the wood is processed into a counterbore, and the connection column and the counterbore can be completely matched when the connection column with the chamfer is installed, thereby reducing the gap and reducing the storage of glue between the annular gap, thereby reducing the connection effect; compared with the traditional shoulder part with an acute angle or a right angle structure, the wood flat drill structure has a wider application range, and is especially suitable for the processing of the counterbore assembled with the connection column with the chamfer.

[0003] However, in actual wood drilling operation, the wood flat drill has obvious defects: first, the wood drill is prone to jamming due to wood chip accumulation during drilling, affecting the smoothness of operation; second, the hole wall roundness is insufficient after drilling, which is difficult to meet the high-precision wood processing requirements; third, the single-blade or traditional blade design leads to fewer cutting contact points, slower drilling efficiency, and cannot adapt to batch or rapid wood processing scenarios. To solve the above problems of the prior art, the present application provides a three-blade high-efficiency wood drill and a preparation method thereof, which optimizes the structure design and preparation process to improve the problems of jamming, poor roundness and low efficiency.

[0004] Therefore, a three-blade high-efficiency wood drill and a preparation method thereof are provided. SUMMARY

[0005] The purpose of the present application is to provide a three-blade high-efficiency wood drill and a preparation method thereof, thereby solving or at least alleviating one or more of the above problems and other aspects of the prior art.

[0006] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the present application include: A three-blade high-efficiency wood drill, comprising a rod body, the upper end of the rod body is fixedly connected with a blade plate, the blade plate is provided with three, the three blade plates are distributed in a circular equidistant array, the top of the blade plate away from the side of the rod body is provided with a convex blade head, the top of the blade plate is provided with a transverse blade edge, the side of the blade plate away from the rod body is provided with a polished blade edge, and the top of the rod body is provided with a positioning piece.

[0007] In the wood drill with three blades and high efficiency of drilling according to the present application, an arc-shaped chip removal notch is formed between the transverse blade edge and the blade plate.

[0008] In the wood drill with three blades and high efficiency of drilling according to the present application, the thickness of the blade plate gradually increases towards the rod body.

[0009] In the wood drill with three blades and high efficiency of drilling according to the present application, the positioning member comprises a positioning head, and a tapping thread is formed on the positioning head.

[0010] In the wood drill with three blades and high efficiency of drilling according to the present application, the positioning head is in the form of a cone.

[0011] In the wood drill with three blades and high efficiency of drilling according to the present application, a hexagonal handle is fixedly connected to the bottom of the rod body.

[0012] The present application also provides a preparation method of the wood drill with three blades and high efficiency of drilling, which comprises the following steps: S1: rod body processing: selecting a 45# steel bar, cutting and processing the rod body into a rod body with a predetermined diameter through a numerical control lathe, and performing end face finishing treatment on both ends of the rod body; S2: blade plate forming and assembling: selecting a high-speed steel plate, processing three blade plates with consistent structures through a wire cutting machine tool, and making the thickness of the blade plates gradually change at a slope of 1:5-1:8 towards the rod body; positioning the three blade plates on the upper end of the rod body through a fixture, ensuring that the three blade plates are in a circular equidistant array (the included angle between adjacent blade plates is 120°), and then fixing the three blade plates through welding; S3: blade edge processing: grinding a convex blade head (the convex height is 0.8-1.2 mm) on the side of the blade plate away from the rod body through a grinding machine, grinding a transverse blade edge (the blade edge angle is 30°-35°) on the top of the blade plate, and grinding an arc-shaped chip removal notch (the notch radius is 1.5-2 mm) between the transverse blade edge and the blade plate; then grinding a polished blade edge (the surface roughness Ra is ≤0.8 μm) on the side of the blade plate away from the rod body through a belt grinding machine; S4: positioning member preparation and installation: selecting an alloy structural steel, processing a conical positioning head (the conical top angle is 60°-75°) through a numerical control lathe, and processing a tapping thread (the pitch is 1.2-1.5 mm) on the outer circle of the positioning head through a tapping machine; coaxially welding and fixing the positioning head and the top of the rod body, and the coaxiality tolerance is ≤0.02 mm; S5: handle assembling: selecting a hexagonal steel material to process a hexagonal handle, and fixing the hexagonal handle at the bottom of the rod body through hot pressing, so as to form a complete wood drill.

[0013] Specifically, in the embodiment, in step S2, laser welding is used for welding the blade plate and the rod body, the welding power is 1.2-1.8 kW, the welding speed is 300-500 mm / min, and after welding, stress relief annealing treatment is performed on the weld, the annealing temperature is 500-550 DEG C, and the holding time is 1-1.5 h.

[0014] Specifically, in the embodiment, in step S3, after the convex blade head and the transverse blade edge are ground, surface nitriding treatment is performed on the blade edge area, the nitriding temperature is 520-560 DEG C, the holding time is 2-3 h, and the nitriding layer thickness is 5-10 mu m; diamond grinding wheel is used for polishing the blade edge.

[0015] Specifically, in the embodiment, in step S4, the positioning head and the rod body are integrated by forging and local machining instead of welding: the steel material at the top of the rod body is forged into a conical body by a hot forging machine, the forging temperature is 1050-1150 DEG C, the forging pressure is 50-80 MPa, then the conical body positioning head is precisely machined by a numerical control lathe, and finally the tapping thread is machined.

[0016] The present application has at least the following beneficial effects: By three blade plates arranged in a circular equidistant array, the cutting contact points are increased, the convex blade head at the top of the blade plate quickly pierces the wood surface layer, and the transverse cutting effect of the transverse blade edge greatly shortens the drilling time and solves the problem of slow drilling of the traditional drill bit.

[0017] The positioning head provided by the conical body is matched with the tapping thread to realize accurate positioning and prevent slipping, and the drilling deviation is avoided; the three blade plates are uniformly stressed, and the polishing effect of the polished blade edge on the side of the blade plate away from the rod body on the hole wall reduces the burr and improves the drilling roundness and surface smoothness.

[0018] The arc-shaped chip removal notch between the transverse blade edge and the blade plate can quickly guide the wood chips to be discharged, avoid the jamming of the drill caused by the accumulation of wood chips in the cutting area, reduce the friction damage of the wood chips to the hole wall, and make the drilling process smoother.

[0019] The thickness of the blade plate gradually increases towards the rod body, which enhances the structural strength of the connection part of the blade plate and the rod body, avoids bending or breaking of the blade plate during drilling, and stabilizes the torque transmission, thereby prolonging the service life of the drill bit. BRIEF DESCRIPTION OF DRAWINGS

[0020] The drawings described herein are used to provide further understanding of the present application, constitute a part of the present application, and the illustrative embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings: Figure 1 It is a structure schematic view of the three-blade high-efficiency drilling woodworking drill of the present application. Figure 2Fig. 1 is a schematic view of the structure of the A part in Fig. 1; Figure 1 Fig. 1 is a schematic view of the structure of the A part in Fig. 1; Figure 3 Fig. 1 is a schematic view of the structure of the A part in Fig. 1;

[0021] Brief Description of the Drawings 1, rod body; 2, blade plate; 201, protruding blade head; 202, transverse cutting edge; 203, arc-shaped chip removal notch; 204, polished cutting edge; 3, hexagonal handle; 4, positioning head; 401, tapping thread. DETAILED DESCRIPTION

[0022] The embodiments of the present application will be described in detail with reference to the drawings and examples, so that the realization process of how the present application applies technical means to solve technical problems and achieve technical effects can be fully understood and implemented.

[0023] Example 1 Please refer to Figures 1 to 2 The present embodiment provides a three-blade high-efficiency wood drill, which comprises a rod body 1, the upper end of the rod body 1 is fixedly connected with a blade plate 2, the blade plate 2 is provided with three, the three blade plates 2 are distributed in a circular equidistant array, the top of the blade plate 2 away from the side of the rod body 1 is provided with a protruding blade head 201, the top of the blade plate 2 is provided with a transverse cutting edge 202, the side of the blade plate 2 away from the rod body 1 is provided with a polished cutting edge 204, and the top of the rod body 1 is provided with a positioning member.

[0024] By adopting the above technical scheme, when drilling, the rod body 1 serves as the main support structure to transmit torque; the three blade plates 2 distributed in a circular equidistant array can simultaneously contact with wood, increasing the cutting points to improve the drilling efficiency; the protruding blade head 201 on the top of the blade plate 2 away from the side of the rod body 1 first contacts with wood, which can quickly pierce the surface of wood to achieve preliminary cutting; the transverse cutting edge 202 on the top of the blade plate 2 rotates with the blade plate 2 to cut wood transversely to expand the hole diameter; the polished cutting edge 204 on the side of the blade plate 2 away from the rod body 1 contacts with the hole wall during drilling to polish the hole wall, reducing burrs; and the positioning member on the top of the rod body 1 plays a positioning role in the early stage of drilling to avoid the drill bit from deviating.

[0025] In the present embodiment, an arc-shaped chip removal notch 203 is provided between the transverse cutting edge 202 and the blade plate 2.

[0026] By adopting the above technical scheme, the wood chips generated by the transverse cutting edge 202 will enter the arc-shaped chip removal notch 203 between the transverse cutting edge 202 and the blade plate 2, and with the rotation of the blade plate 2, the arc-shaped chip removal notch 203 guides the wood chips to be discharged along the notch by virtue of its arc-shaped structure, avoiding the accumulation of wood chips in the cutting area to affect the cutting efficiency of the transverse cutting edge 202, and reducing the frictional damage of wood chips to the hole wall.

[0027] In this embodiment, the thickness of the blade plate 2 gradually increases towards the rod body 1.

[0028] By adopting the above technical scheme, the thickness of the blade plate 2 gradually increases towards the rod body 1, which can enhance the structural strength of the connecting part of the blade plate 2 and the rod body 1, avoid bending or breaking of the blade plate 2 due to excessive force during drilling, and at the same time, the thicker connecting part can more stably transmit the torque of the rod body 1 to the cutting part of the blade plate 2, ensure uniform cutting force of the three blade plates 2, and improve drilling stability.

[0029] In this embodiment, the positioning member includes a positioning head 4, and a tapping thread 401 is formed on the positioning head 4.

[0030] By adopting the above technical scheme, the positioning head 4 of the positioning member first contacts the wood at the initial stage of drilling, and plays a preliminary positioning role; the tapping thread 401 on the positioning head 4 can be screwed into the wood like a screw when the drill bit rotates, further enhancing the connection stability of the positioning head 4 and the wood, avoiding the positioning head 4 from slipping out of the wood during drilling, thereby ensuring the positioning accuracy of the entire drill bit and reducing drilling deviation.

[0031] In this embodiment, the positioning head 4 is in the shape of a cone.

[0032] By adopting the above technical scheme, the positioning head 4 in the shape of a cone has a sharp top end, which can easily penetrate into the surface layer of the wood at the initial stage of drilling, quickly completing the initial positioning; at the same time, the side surface of the cone is inclined, and as the positioning head 4 penetrates into the wood, the side surface can form stable contact and support with the wood, further limiting the radial deviation of the drill bit, and ensuring that the positioning head 4 drives the entire drill bit to drill along the preset axis.

[0033] In this embodiment, the bottom of the rod body 1 is fixedly connected with a hexagonal handle 3.

[0034] By adopting the above technical scheme, the hexagonal handle 3 at the bottom of the rod body 1 can be adapted to the clamping part of tools such as wrenches and electric drills, and the hexagonal structure can effectively prevent relative sliding between the tool and the handle, ensure that the torque of the tool can be stably transmitted to the rod body 1, and improve the convenience of operation and the efficiency of torque transmission.

[0035] Embodiment 2 Please refer to Figure 3 The preparation method of the woodworking drill for three-blade high-efficiency drilling provided in this embodiment includes the following steps: S1: rod body processing: select a 45 steel bar, cut and process it into a rod body 1 with a predetermined diameter through a numerical control lathe, and perform end face finishing treatment on both ends of the rod body 1; S2: Blade plate forming and assembly: Select high speed steel plate, process 3 structure consistent blade plate 2 through wire cutting machine tool, and make the thickness of blade plate 2 to the direction of the rod body 1 1:5-1:8 slope gradient; The three blade plates 2 are positioned on the upper end of the rod body 1 through the fixture, ensuring that the three blade plates 2 are in a circular equidistant array (the adjacent blade plate angle is 120°), and then fixed by welding; S3: Blade processing: The top of the blade plate 2 away from the rod body 1 is ground to a convex blade head 201 (convex height 0.8-1.2mm) using a grinding machine, a transverse blade 202 (blade angle 30°-35°) is ground on the top of the blade plate 2, and an arc-shaped chip removal notch 203 (notch radius 1.5-2mm) is ground between the transverse blade 202 and the blade plate 2; Then a polishing blade 204 (surface roughness Ra≤0.8μm) is ground on the side of the blade plate 2 away from the rod body 1 using a belt grinding machine; S4: Positioning part preparation and installation: Select alloy structural steel, process conical positioning head 4 (conical top angle 60°-75°) through numerical control lathe, then process tapping thread 401 (pitch 1.2-1.5mm) on the outer circle of the positioning head 4 through the tapping machine; The positioning head 4 and the rod body 1 are coaxially welded and fixed at the top, and the coaxiality tolerance is ≤0.02mm; S5: Handle assembly: Select hexagonal steel to process hexagonal handle 3, and fix the hexagonal handle 3 at the bottom of the rod body 1 through hot pressing, forming a complete woodworking drill.

[0036] The rod body 1 is cut and processed by numerical control lathe and the end face is processed flat, which can ensure the basic size accuracy and end face flatness of the rod body 1, provide accurate reference for the assembly of the subsequent blade plate 2, positioning head 4 and hexagonal handle 3, and avoid assembly deviation of the subsequent parts due to insufficient accuracy of the rod body 1 itself.

[0037] The blade plate 2 is processed by wire cutting, and the high speed steel material itself has good cutting performance, which can meet the demand of woodworking drill hole on the cutting ability of the blade; The thickness of the blade plate 2 gradually changes towards the rod body 1, which can enhance the structural strength of the connection part between the blade plate 2 and the rod body 1, and avoid the fracture of the blade plate 2 from the connection during drilling; The three blade plates 2 are positioned in a circular equidistant array through the fixture, which can ensure that the three blade plates 2 are evenly stressed during drilling, reduce the drilling deviation caused by uneven distribution of the blade plate 2, and improve the drilling efficiency by multiple blade cutting.

[0038] The protruding blade head 201 processed by the grinder can quickly pierce the wood surface at the initial stage of drilling to reduce the initial cutting resistance; the transverse blade edge 202 can cut the wood transversely when the blade plate 2 rotates to help the hole diameter expand quickly; the arc-shaped chip removal notch 203 can guide the wood chips generated by cutting to be discharged, avoiding the accumulation of wood chips in the cutting area, which causes the drilling to be blocked, and reducing the friction damage of the wood chips to the hole wall; the polishing blade edge 204 processed by the abrasive belt grinder can contact and polish the hole wall during the drilling process, reducing the burr of the hole wall and improving the smoothness of the drilling surface.

[0039] The positioning head 4 is made of alloy structural steel and is processed into a cone body with a tapping thread 401. The cone body structure facilitates the positioning head 4 to quickly pierce into the wood to achieve initial positioning, and the tapping thread 401 can enhance the connection stability of the positioning head 4 and the wood to avoid the positioning head 4 from slipping during drilling. The positioning head 4 is coaxially welded with the rod body 1 to ensure the coaxiality of the positioning head 4 and the rod body 1, further avoiding drilling deviation and improving drilling accuracy.

[0040] The hexagonal handle 3 is fixed at the bottom of the rod body 1 by hot pressing, which can ensure that the hexagonal handle 3 is firmly connected with the rod body 1 and is not easy to loosen during use. The hexagonal structure facilitates clamping with tools such as wrenches and electric drills, and can prevent relative sliding between the tool and the hexagonal handle 3, ensuring that the torque of the tool is stably transmitted to the rod body 1, and ensuring the effectiveness of torque transmission during drilling.

[0041] Specifically, in this embodiment, in step S2, the welding of the blade plate 2 and the rod body 1 adopts laser welding, the welding power is 1.2-1.8kW, the welding speed is 300-500mm / min, and after welding, the weld is subjected to stress relief annealing treatment, the annealing temperature is 500-550℃, and the holding time is 1-1.5h.

[0042] The blade plate 2 and the rod body 1 are laser welded, and the heat-affected zone of laser welding is small, which can avoid the hardness decrease of the high-speed steel blade plate 2 due to high temperature welding, thereby ensuring the cutting performance of the blade edge of the blade plate 2 and ensuring that the blade plate 2 can continuously and stably cut during subsequent drilling.

[0043] After welding, the weld is subjected to stress relief annealing treatment, which can eliminate the residual stress at the connection part of the blade plate 2 and the rod body 1 after laser welding, avoid the fracture of the blade plate 2 due to stress concentration during drilling, and prolong the service life of the woodworking drill as a whole; at the same time, the annealing treatment can further improve the structural stability of the weld, enhance the connection strength of the blade plate 2 and the rod body 1, and prevent the blade plate 2 from falling off from the weld during drilling.

[0044] Specifically, in this embodiment, after the grinding of the convex blade head 201 and the transverse blade edge 202 is completed, the surface of the blade edge area is nitrided in step S3, the nitriding temperature is 520-560℃, the holding time is 2-3h, and the thickness of the nitriding layer is 5-10μm; the grinding of the polished blade edge 204 uses a diamond grinding wheel with a grit size of 800-1000 mesh.

[0045] The surface nitriding treatment of the convex blade head 201 and the transverse blade edge 202 can improve the hardness of the blade edge area, enhance the wear resistance of the blade edge, avoid dulling of the blade edge due to wear during long-term drilling, and ensure the continuous cutting ability of the blade edge; and the nitriding layer has good toughness, which can prevent the blade edge from chipping when cutting hard wood, and balances the hardness and toughness of the blade edge.

[0046] The polished blade edge 204 is ground by a diamond grinding wheel, which has high grinding precision and can further reduce the surface roughness of the polished blade edge 204, so that the polishing effect of the polished blade edge 204 when it contacts the hole wall is better, the burr on the hole wall is reduced, and the smoothness of the drilling surface is improved; at the same time, high-precision grinding can ensure the dimensional accuracy of the polished blade edge 204, avoiding the deviation of drilling roundness caused by insufficient precision of the polished blade edge 204.

[0047] Specifically, in this embodiment, in step S4, the positioning head 4 and the rod body 1 are integrated by forging and local machining instead of welding: the steel material at the top of the rod body 1 is forged into a conical shape by a hot forging machine, the forging temperature is 1050-1150℃, the forging pressure is 50-80MPa, and then the conical positioning head 4 is finished by a numerical control lathe, and finally the tapping thread 401 is machined.

[0048] The positioning head 4 and the rod body 1 are integrated by forging instead of welding, which eliminates the welding joint between the positioning head 4 and the rod body 1, avoids the problems of virtual welding and separation that may occur in traditional welding, greatly improves the connection strength of the positioning head 4 and the rod body 1, and makes the woodworking drill suitable for scenarios that require large torque such as hard wood drilling, preventing the positioning head 4 from separating from the rod body 1 under high torque.

[0049] The hot forging process can refine the metal grains in the positioning head 4 area, improve the material density of the positioning head 4, and enhance the anti-deformation ability of the positioning head 4, avoiding the conicity deviation of the positioning head 4 due to deformation after long-term use, which leads to a decrease in positioning accuracy or even positioning failure; at the same time, the integrated process reduces the welding, coaxiality detection and other processes, simplifies the production process, improves the production efficiency, and reduces the scrap rate caused by welding defects.

[0050] In summary: the working principle of the woodworking drill with three blades and high efficiency is as follows: 1. Positioning and guiding principle: The positioning head 4 at the top of the rod body 1 is conical, with a sharp tip that can quickly penetrate the surface of the wood to preliminarily determine the drilling axis. The tapping thread 401 on the outer circumference of the positioning head 4 can rotate into the interior of the wood like a screw when the rod body 1 rotates, enhancing the connection stability of the positioning head 4 and the wood, avoiding the positioning head 4 from slipping during drilling, further fixing the drilling axis, and preventing drilling deviation.

[0051] 2. Torque transmission principle: The rod body 1 is the core support of the overall structure, with a hexagonal handle 3 at the bottom that is compatible with tools such as wrenches and drills. The hexagonal structure prevents the tool from sliding relative to the handle, ensuring that the torque output by the tool can be stably transmitted to the rod body 1. The rod body 1 then transmits the torque to the three blade plates 2 fixed at the upper end, providing power for cutting.

[0052] 3. High-efficiency cutting principle: The three blade plates 2 are arranged in a circular equidistant array, which can simultaneously contact the wood, increasing the cutting contact points. The protruding blade head 201 on the side of the blade plate 2 away from the rod body 1 can quickly penetrate the surface of the wood, reducing the initial cutting resistance. The transverse blade edge 202 at the top of the blade plate 2 rotates with the blade plate 2, performing transverse cutting on the wood, rapidly expanding the hole diameter, and improving drilling efficiency.

[0053] 4. Chip removal and hole wall optimization principle: The arc-shaped chip removal gap 203 between the transverse blade edge 202 and the blade plate 2 can guide the wood chips to be removed along the gap during cutting, avoiding the accumulation of wood chips in the cutting area, which can cause drilling jamming, and reducing the friction damage of the wood chips to the hole wall. The polished blade edge 204 on the side of the blade plate 2 away from the rod body 1 continuously contacts the hole wall during drilling, polishing the hole wall, reducing the burr of the hole wall, and improving the roundness and surface smoothness of the hole.

[0054] 5. Structural strength guarantee principle: The thickness of the blade plate 2 gradually increases towards the rod body 1, enhancing the structural strength of the connection between the blade plate 2 and the rod body 1, avoiding the bending or breaking of the blade plate 2 due to excessive cutting stress. If laser welding is used to connect the blade plate 2 and the rod body 1, the heat-affected zone can be reduced, ensuring the cutting performance of the blade plate 2 (high-speed steel material), and subsequent stress relief annealing can eliminate the residual stress of welding, further improving the connection stability.

[0055] Usage method: 1. Tool assembly: Align the hexagonal handle 3 at the bottom of the woodworking drill with the clamping part of the wrench or drill, ensuring that the tool is clamped firmly to avoid loosening during use.

[0056] 2. Positioning and alignment: According to the woodworking processing requirements, mark the position to be drilled on the wood, and align the tip of the positioning head 4 at the top of the woodworking drill with the mark, and gently press the tip of the positioning head 4 to contact the surface of the wood.

[0057] 3. Start cutting: Start the clamping tool (such as an electric drill), the tool drives the hexagonal handle 3 and the rod body 1 to rotate, the positioning head 4 rotates with the rod body 1, the tapping thread 401 is screwed into the wood, gradually deepening and fixing the drilling axis; at the same time, the blade plate 2 rotates with the rod body 1, the convex blade head 201 pierces the wood surface, and the horizontal blade edge 202 starts to cut the wood horizontally, gradually expanding the hole diameter.

[0058] 4. Continuous drilling and chip removal: During the drilling process, the wood chips generated by cutting will naturally enter the arc-shaped chip removal gap 203 and be discharged along the gap as the blade plate 2 rotates; the polishing edge 204 is in contact with the hole wall at the same time, polishing the hole wall and reducing the burr.

[0059] 5. Drilling completion and exit: When the drilling depth reaches the requirement, turn off the tool or slowly remove the woodworking drill from the drilling hole in the reverse direction to complete the drilling operation.

[0060] Overall technical effect: 1. Improved positioning accuracy: Through the cooperation of the conical positioning head 4 and the tapping thread 401, combined with the coaxial assembly (welding or forging integration) of the positioning head 4 and the rod body 1, the problem of existing flat drill drilling deviation is effectively avoided, ensuring the stability of the drilling axis and meeting the requirements of woodworking processing for drilling position accuracy.

[0061] 2. Drilling efficiency is significantly improved: Three equidistant arrays of blade plates 2 increase the cutting contact points, combined with the design of the convex blade head 201 to quickly break the surface and the horizontal blade edge 202 to efficiently expand the hole, solving the defect of slow efficiency of existing flat drills, which can quickly complete wood drilling and adapt to batch or rapid processing scenarios.

[0062] 3. Drilling quality optimization: The arc-shaped chip removal gap 203 avoids the jamming of the drilling caused by the accumulation of wood chips, while reducing the friction of wood chips on the hole wall; the polishing edge 204 polishes the hole wall, reducing the burr of the hole wall, improving the roundness and surface smoothness of the drilling, and meeting the requirements of high-precision woodworking processing for hole wall quality.

[0063] 4. Enhanced structural durability: The thickness gradient design of the blade plate 2 enhances the strength of the connection between the blade plate 2 and the rod body 1, avoiding the breakage of the blade plate 2; laser welding and stress relief annealing treatment ensure the stability of the connection between the blade plate 2 and the rod body 1, reducing welding defects; the surface nitriding treatment of the blade edge area improves the wear resistance of the convex blade head 201 and the horizontal blade edge 202, avoiding blade dulling and prolonging the service life of the woodworking drill as a whole; the forging integration process of the positioning head 4 and the rod body 1 eliminates the welding joint, improves the connection strength, and adapts to the drilling scenarios of hard wood and other materials that require large torque.

[0064] 5. Improved operation convenience: The hexagonal handle 3 is compatible with conventional tools, can stably transmit torque, avoids relative sliding between the tool and the handle, reduces the difficulty of operation, and facilitates woodworking personnel to quickly start using.

[0065] The foregoing description illustrates and describes several preferred embodiments of the present application. However, it is to be understood that the application is not limited to the precise arrangements and instrumentalities described herein, and that other embodiments and modifications can be employed without departing from the spirit and scope of the application. It is intended that all such alterations and modifications be considered as within the scope of the application as defined by the appended claims.

Claims

1. A three-fluted high-performance wood drill, characterized in that The utility model provides a wood working drill, including the pole body (1), the upper end of pole body (1) is fixedly connected with blade plate (2), blade plate (2) is provided with three, three blade plate (2) are circular equidistance array distribution, the top of blade plate (2) is provided with convex blade head (201) away from the side of pole body (1), the top of blade plate (2) is provided with transverse cutting edge (202), the side of blade plate (2) is provided with polishing cutting edge (204) away from pole body (1), the top of pole body (1) is provided with positioning part.

2. The three-lipped high performance wood drill according to claim 1, wherein: The transverse cutting edge (202) and the blade plate (2) are provided with an arc-shaped chip removal notch (203).

3. The three-lipped high performance wood drill according to claim 2, wherein: The thickness of the blade plate (2) gradually increases towards the pole body (1).

4. The three-lip high performance hole drilling wood drill according to claim 1, characterized in that: The positioning part includes a positioning head (4) having a tapped thread (401) formed thereon.

5. The three-lipped high performance hole-making wood drill according to claim 4, wherein: The positioning head (4) is in the shape of a cone.

6. The three-lip high performance hole drilling wood drill according to claim 1, characterized in that: The bottom of the pole body (1) is fixedly connected with a hexagonal handle (3).

7. A method of manufacturing a three-lipped high performance wood drill according to any one of claims 1-6, characterized in that, The steps include: S1: pole body processing: select a 45 steel bar, cut it into a pole body (1) of a predetermined diameter by a numerical control lathe, and perform end face finishing treatment on both ends of the pole body (1); S2: blade plate forming and assembling: select high-speed steel plate, process three blade plates (2) of the same structure by a wire cutting machine, and make the thickness of the blade plates (2) gradually change at a slope of 1:5-1:8 towards the pole body (1); position the three blade plates (2) on the upper end of the pole body (1) by a fixture to ensure that the three blade plates (2) are circularly and equidistantly arrayed, and then weld them; S3: cutting edge processing: use a grinder to grind a convex blade head (201) on the side of the top of the blade plate (2) away from the pole body (1), grind a transverse cutting edge (202) on the top of the blade plate (2), and grind an arc-shaped chip removal notch (203) between the transverse cutting edge (202) and the blade plate (2); then use a belt grinder to grind a polishing cutting edge (204) on the side of the blade plate (2) away from the pole body (1); S4: positioning part preparation and installation: select alloy structural steel, process a conical positioning head (4) by a numerical control lathe, and process a tapped thread (401) on the outer circumference of the positioning head (4) by a tapping machine; coaxially weld and fix the positioning head (4) and the top of the pole body (1), and the coaxiality tolerance is ≤0.02mm; S5: handle assembling: select hexagonal steel to process a hexagonal handle (3), and fix the hexagonal handle (3) on the bottom of the pole body (1) by hot pressing to form a complete wood working drill.

8. A method of making a three-lipped high performance drill according to claim 7, characterised in that, In step S2, laser welding is used for welding the blade plate (2) and the pole body (1), the welding power is 1.2-1.8kW, the welding speed is 300-500mm / min, and after welding, the weld is subjected to stress relief annealing treatment, the annealing temperature is 500-550℃, and the holding time is 1-1.5h.

9. The method of making a three-lipped high performance drill according to claim 8, wherein, In step S3, after grinding the convex blade head (201) and the transverse cutting edge (202), the surface of the cutting edge area is subjected to nitriding treatment, the nitriding temperature is 520-560℃, the holding time is 2-3h, the thickness of the nitriding layer is 5-10μm, and the grinding of the polishing cutting edge (204) uses a diamond grinding wheel with a grit size of 800-1000.

10. A method of making a three-fluted high-performance drilling wood drill according to any of claims 7-9, characterized in that, In step S4, the positioning head (4) and the rod body (1) are integrated by forging and partially processed instead of welding: the steel at the top of the rod body (1) is forged into a conical body by a hot forging machine, the forging temperature is 1050-1150℃, the forging pressure is 50-80MPa, and then the conical body positioning head (4) is precisely machined by a numerical control lathe, and finally the threaded holes (401) are machined.

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