Spiral grooving cutter

Abstract

The utility model relates to the technical field of cutters, in particular to a spiral slotting cutter, which is suitable for slotting and processing wood boards, adopts a spiral design, and comprises a cutter handle and a cutter head axially connected to the end part of the cutter handle, the cutter handle and the cutter head are integrally formed, the cutter handle is configured to be connected with a clamp, and the clamp is connected with the cutter head. At least two axial lower cutting blades are uniformly distributed in the circumferential direction of the tool bit, and the axial lower cutting blades are arranged on the tool bit in a central symmetry manner; wherein the front tool face of the axial lower cutting blade is of an arc-shaped structure, and the cutting blades are evenly distributed in the circumferential direction of the tool bit and arranged on the tool bit in a central symmetry mode. Wherein each axial downward cutting insert has the same circumferential tilt direction with respect to the axis. Through the arrangement of the scheme, the problem of cutting machining of soft wood boards can be solved, burrs are improved, and the machining quality of the boards is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cutting tools, in particular to a spiral slotting tool. Background Art

[0002] Wood slotting knives are mainly used to make grooves or grooves on the surface of wood. Slotting knives have blades of different shapes and sizes. You can choose the appropriate slotting knives for wood processing according to your needs. Compared with milling cutters used for cutting metal, woodworking knives have larger front and back angles to obtain sharp edges, reduce cutting resistance and have larger chip space.

[0003] In the entire tool industry, tools are all integral structures, that is, the cutting edge is directly processed on the blade of the integral alloy rod. The disadvantage of this method is that the cost is relatively high. After the rod is hot-processed, thermal stress will be generated, which will cause the alloy rod to break. Another method is to separate the handle and the blade, sharpen the individual blades, and then connect them together by welding. Also, welding will cause thermal stress in the blade alloy rod, resulting in the risk of the blade breaking.

[0004] On April 29, 2022, a Chinese patent document disclosed a slotting tool seat structure, a tool head structure and a slotting tool, with the announcement number CN217192845U. In this scheme, the blade is installed in the mounting groove of the blade body, specifically, the blade mounting groove includes a first mounting surface, a second mounting surface and a third mounting surface; the two opposite side edges of the second mounting surface are respectively connected to one side of the first mounting surface and one side of the third mounting surface, and the other side of the third mounting surface is connected to the first chip removal surface; wherein, the distance between the two side edges of the first mounting surface is greater than the distance between the two side edges of the third mounting surface. Through the structural design of the blade mounting groove, when the force is generated, the side wall on one side of the groove can provide a corresponding reaction force, thereby fixing both sides of the blade and ensuring the stability of the blade installation.

[0005] In this solution, the blade is rectangular and the cutting edge is a straight line, so the grooving effect is not good, the quality of the processed plate is poor, and burrs will occur. Utility Model Content

[0006] In view of the above-mentioned prior art that the cutting edge causes burrs on the cutting surface of the wooden board, the utility model provides a spiral slotting knife. Through the arrangement of this scheme, the problem of burrs generated by cutting soft wooden board materials can be solved.

[0007] In order to solve the above technical problems, the utility model adopts the following technical solutions: a spiral grooving cutter, comprising a shank and a cutter head axially connected to the end of the shank, the shank and the cutter head being integrally formed, wherein the shank is configured to be connected to a fixture, at least two axially lower cutting blades are evenly distributed on the cutter head in a circumferential direction, and the axially lower cutting blades are arranged on the cutter head in a centrally symmetrical manner, and the outer side wall of the cutter head is processed with a mounting groove for assembling the axially lower cutting blade; wherein the front cutting surface of the axially lower cutting blade has an arc-shaped structure.

[0008] Furthermore, the arc-shaped structure of the axially downward cutting blade forms a spiral cutting edge.

[0009] Furthermore, the helix angle of the helical cutting edge is 15°-25°.

[0010] Further, the front angle α of the axially downward cutting blade is 15°-25°, and the back angle β of the axially downward cutting blade is 15°-25°.

[0011] Furthermore, a chip removal surface is provided on the opposite side of the mounting groove.

[0012] Furthermore, the axial lower cutting edge is embedded in the side wall of the cutter head, and the three side surfaces of the mounting groove are embedded with the three side surfaces of the axial lower cutting blade.

[0013] Further, the axially downward cutting blades in the circumferential direction are arranged to be inclined in a clockwise or counterclockwise direction, and the projections of the cutting tips of the axially downward cutting blades in the radial direction overlap.

[0014] Furthermore, the tip of the axially downward cutting blade extends out of the front end surface of the cutter head, and the tips of the axially downward cutting blades on the circumference are located on the same circumference.

[0015] Furthermore, a front end surface of the cutter head is provided with an inclined surface corresponding to the axially downward cutting blade, and the number of the inclined surfaces is consistent with the number of the axially downward cutting blade.

[0016] Furthermore, a boss is provided between the tool handle and the tool head, the diameter of the tool handle is smaller than the diameter of the boss, and a groove is provided between the tool handle and the boss, and the groove is arranged along the circumference of the tool handle.

[0017] In summary, the utility model has the following beneficial effects:

[0018] (1) In the spiral grooving cutter, the axial downward cutting blade is arranged on the cutter head, and each axial downward cutting blade has a certain inclination angle along the circumferential direction and relative to the axis of the cutter head or the handle. When the tool performs rotational cutting, the cutting edge is subjected to the cutting force from the circumferential direction and the axial downward cutting force at the same time. The axial downward cutting blade is provided with a spiral cutting edge. By controlling the arc size of the front cutting edge and the side cutting edge, the front angle and the back angle of the cutting edge can be effectively controlled, so that the front angle of the tool can reach the desired reasonable angle. Compared with the straight cutting edge, the cutting effect during the processing can be improved. Secondly, the spiral cutting edge can better clean the chips, reduce the friction and heat generated during cutting, and further improve the processing accuracy and surface quality. In addition, the design of the spiral cutting edge can effectively reduce the generation of burrs, making the edge of the plate smoother and smoother.

[0019] (2) The overall shape of the axial downward cutting blade is rectangular or sheet-shaped, and it is assembled on the cutter head through a mounting groove. This makes it convenient to process a single rectangular cutting blade, so that a spiral cutting edge can be processed on the blade through general processing methods, and then the axial downward cutting blade is assembled in the mounting groove and fixed by welding or the like. Compared with directly making the blade into a spiral blank, this method of processing a spiral cutting edge on a rectangular blade is simpler and has lower cost.

[0020] (3) The handle and the blade are formed as one piece, that is, a groove for installing the blade can be milled on the handle material, and the blade is welded in the groove. Compared with the method of directly sharpening the blade of the integral alloy rod, or the method of separating the blade and the handle and welding them, sheet alloy is used for welding. In this method, the groove for installing the blade is milled directly on the handle material, the blade is an alloy material, and the blade is welded in the groove. The thermal stress generated by the welding of the sheet alloy has little effect on the blade itself, and the blade will not break. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is the front view of the three-blade spiral grooving cutter.

[0022] Figure 2 This is the end view of the cutter head of the three-edge spiral grooving cutter.

[0023] Figure 3 This is the front view of the three-edge spiral grooving cutter without the blade installed.

[0024] Figure 4 This is an end view of the cutter head of a three-edge spiral grooving cutter without a blade installed.

[0025] Figure 5 It is the front view of the axial downward cutting blade.

[0026] Figure 6 Spiral grooving cutter for unmachined bosses and grooves.

[0027] Figure 7 This is the front view of the double-edged spiral grooving cutter.

[0028] Figure 8 This is an end view of the cutter head of a two-edged spiral grooving cutter.

[0029] Fig. 9 This is the front view of the two-edged spiral grooving cutter without the blade installed.

[0030] Fig.10 This is an end view of the cutter head of a two-edged spiral grooving cutter without a blade installed.

[0031] 1. Tool handle; 2. Tool head; 21. Chip removal surface; 22. Mounting groove; 23. Inclined surface; 3. Axial downward cutting blade; 31. Spiral cutting edge; 4. Boss; 5. Groove. DETAILED DESCRIPTION

[0032] The utility model is further described in detail below in conjunction with the embodiments.

[0033] Embodiment 1:

[0034] like Figure 1-Figure 6 As shown, a spiral grooving tool comprises a shank 1 and a cutter head 2 axially connected to the end of the shank 1, wherein the shank 1 and the cutter head 2 are integrally formed by milling the shank on the material for manufacturing the shank and milling the cutter head on the shank, wherein the shank 1 is configured to be connected to a fixture, the cutter head 2 has at least two axially lower cutting blades 3 evenly distributed in the circumferential direction, and the axially lower cutting blades 3 are centrally symmetrically arranged on the cutter head 2, and the outer side wall of the cutter head 2 is processed with a mounting groove 22 for assembling the axially lower cutting blade 3; wherein the front cutting surface of the axially lower cutting blade 3 has an arc-shaped structure.

[0035] The handle 1 and the cutter head 2 are formed as one piece, that is, a groove specifically for installing the blade can be milled on the material of the handle, the blade can be sharpened separately, and the blade can be welded in the groove. Compared with the method of directly sharpening the integral alloy rod, or the method of separating the cutter head 2 and the handle 1, and then connecting the cutter head and the handle by welding after the cutting edge is cut. In this embodiment, sheet alloy is used for welding, that is, a suitable cutting edge is cut on the rectangular blade, and then the blade is welded to the cutter head, which reduces the manufacturing cost of the integral alloy rod and the risk of breakage of the cutter head 2 caused by thermal stress. Secondly, the welding of the sheet alloy has little effect on the blade itself, which can maintain the stability and reliability of the blade.

[0036] In this embodiment, compared with the poor grooving effect of the straight edge, the quality of the processed plate is poor and the burr phenomenon is serious. Now the arc edge is provided on the blade to improve the burr. This tool design can achieve a more stable and balanced cutting process, reduce vibration and cutting force, and improve cutting efficiency.

[0037] Optionally, the axial lower cutting blade 3 is configured as two-edged, three-edged or four-edged. Figure 7 , Figure 8 , Fig. 9 and Fig.10 Shown is a spiral grooving cutter in a two-edged state.

[0038] Embodiment 2:

[0039] like Figure 1-Figure 6 As shown, the spiral slotting tool based on Example 1 is suitable for slotting and processing wood panels. The tool adopts a spiral design, including a handle 1 and a cutter head 2 axially connected to the end of the handle 1, wherein the handle 1 and the cutter head 2 are integrally formed, wherein the handle 1 is configured to be connected to a fixture, and the cutter head 2 has at least two axially lower cutting blades 3 evenly distributed in the circumferential direction, and the axially lower cutting blades 3 are arranged on the cutter head 2 in a centrally symmetrical manner, and the outer wall of the cutter head 2 is processed with a mounting groove 22 for assembling the axially lower cutting blades 3; wherein the front cutting surface of the axially lower cutting blade 3 has an arc structure. The front cutting surface of the arc structure is easier to enter the workpiece and produce a smooth cutting surface. During cutting, the chips are easily discharged from the cutting area, which avoids the tool jamming and accumulation during the cutting process and ensures the quality of the machined surface.

[0040] In this embodiment, the outer wall of the cutter head 2 is processed with a mounting groove 22 for assembling the axially downward cutting blade 3. A plurality of mounting grooves 22 are inclinedly opened on the cutter head 2 in the circumferential direction. The cutting blade is fixed in the mounting groove 22 by welding or other methods. A chip removal surface 21 is processed on the opposite side of the mounting groove 22. The chip removal surface 21 on the cutter head 2 is used to remove chips and chip fragments generated during the processing, and prevent chips from accumulating between the tool and the workpiece, affecting the processing quality and processing efficiency. The chip removal surface 21 can also reduce the friction resistance during cutting, extend the service life of the tool, and improve the processing efficiency. At the same time, the chip removal surface 21 can also reduce the damage of chips to the surface of the workpiece, and ensure the quality and precision of the processed surface. Among them, the mounting groove 22 and the chip removal surface 21 extend axially to the end of the cutter head 2 close to the handle 1, so that the mounting groove 22 and the chip removal surface 21 can be used for chip removal.

[0041] During implementation, the axially lower cutting edge is embedded in the side wall of the cutter head 2, and the three sides of the mounting groove 22 are embedded with the three sides of the axially lower cutting blade 3. An appropriate linear processing position is selected on the side wall of the cutting cutter, and a mounting groove 22 is processed by a machine. The mounting groove 22 should match the size of the cutting blade and be able to accommodate the thickness of the cutting blade. In this way, the cutting blade can be placed in the mounting groove 22 to ensure that it can be embedded in the groove to ensure that the cutting blade can be correctly installed. The cutting blade fits the three sides of the mounting groove 22 and is fixed in the mounting groove 22 by welding. This design can ensure a close fit between the cutting blade and the mounting groove 22, and improve the stability and cutting accuracy of the tool. Welding fixation can also ensure that the blade will not move or fall off during the cutting process, ensuring processing quality and safety. The specific operation is to assemble and adjust the position of the blade, and then use welding to fix the blade. Before welding, ensure that the surface of the cutting blade and the mounting groove 22 is clean. Since the three sides of the mounting groove 22 are embedded with the three sides of the axially lower cutting blade 3, the blade is firmly fixed in the mounting groove 22. In a specific implementation, there is a certain gap between the mounting groove 22 and the two side walls opposite to the axial lower cutting blade 3, so as to facilitate mounting and welding.

[0042] Preferably, the arc structure of the axially downward cutting blade 3 forms a spiral cutting edge 31. The spiral cutting edge is located outside the blade. The helix angle of the cutting edge is between 15° and 25°. Preferably, the helix angle of the cutting edge 211 is 20°.

[0043] Preferably, the axial downward cutting blade 3 in the circumferential direction is tilted in a clockwise or counterclockwise direction, and the tips of the axial downward cutting blade 3 overlap in radial projection. At the same time, the tips of the axial downward cutting blade 3 extend out of the front end face of the cutter head 2, and the tips of the axial downward cutting blade 3 on the circumference are on the same circumference. The diameter of the circle where the tips are located is larger than the diameter of the body of the cutter head 2, and when processing the board material, the processing diameters of each tip are the same. During implementation, the front end face of the blade can be processed into an inclined bevel 23, so that the front end face of each blade is in the same horizontal plane on the cutter head 2, so as to achieve grooving of the wood material.

[0044] Embodiment 3:

[0045] like Figure 1-Figure 5As shown, the spiral grooving tool based on Examples 1 and 2 is suitable for grooving and processing wood panels. The tool adopts a spiral design, including a shank 1 and a cutter head 2 axially connected to the end of the shank 1, the shank 1 and the cutter head 2 are integrally formed, wherein the shank 1 is configured to be connected to a fixture, the cutter head 2 has at least two axially lower cutting blades 3 evenly distributed in the circumferential direction, and the axially lower cutting blades 3 are centrally symmetrically arranged on the cutter head 2, and the outer side wall of the cutter head 2 is processed with a mounting groove 22 for assembling the axially lower cutting blade 3; wherein the front cutting surface of the axially lower cutting blade 3 has an arc structure.

[0046] Among them, the size of the rake angle directly affects the sharpness of the tool, and the size of the back angle affects the wear resistance and surface flatness of the tool. In this embodiment, the structure of the arc rake face can effectively control the size of the rake angle of the cutting edge by controlling the size of the arc, so that the product rake angle can reach the desired reasonable angle, the rake angle α of the axial lower cutting edge 21 is in the range of 15°-20°, and the back angle β of the axial lower cutting edge 21 is in the range of 15°-20°. The side wall of the blade close to the cutting edge is also processed into a spiral bevel 23 to satisfy the blade having a spiral cutting edge.

[0047] During implementation, a bevel 23 corresponding to the axially lower cutting blade 3 is provided on the front end face of the cutter head 2, and the number of the bevels 23 is consistent with the number of the axially lower cutting blades 3. The setting of the bevel 23 can effectively guide the discharge of the cutting chip layer, reduce cutting resistance and cutting heat, and improve the cutting speed and the smoothness of the cutting surface.

[0048] The number of the axial cutting blades 3, including the configuration of two-edge, three-edge or four-edge, such as Figure 7-10 As shown, it is a two-edged spiral grooving cutter, wherein the mounting groove 22, the chip removal surface 21 and the inclined surface 23 are arranged corresponding to the blade.

[0049] In the above-mentioned embodiments 1, 2 and 3, preferably, the tool handle 1, the tool head 2, the mounting groove 22, the chip removal surface 21 and the inclined surface 23 are processed on the integrally formed tool body, such as Figure 6 As shown, during implementation, a boss 4 can be processed between the shank 1 and the tool head 2, the diameter of the shank 1 is smaller than the diameter of the boss 4, and a groove 5 is processed between the shank 1 and the boss 4, the groove 5 is arranged circumferentially along the shank 1, and the boss 4 and the groove 5 are tool positioning steps.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A spiral slotting cutter, characterized in that: The invention comprises a tool holder (1) and a tool head (2) axially connected to the end of the tool holder (1), wherein the tool holder (1) and the tool head (2) are integrally formed, wherein the tool holder (1) is configured to be connected to a fixture, at least two axially lower cutting blades (3) are evenly distributed on the tool head (2) in the circumferential direction, and the axially lower cutting blades (3) are arranged on the tool head (2) in a centrally symmetrical manner, and an outer wall of the tool head (2) is machined with a mounting groove (22) for assembling the axially lower cutting blades (3); wherein the front cutting surface of the axially lower cutting blade (3) has an arc-shaped structure.

2. The spiral slotting cutter according to claim 1, characterized in that: The arc-shaped structure of the axially downward cutting blade (3) forms a spiral cutting edge (31).

3. The spiral slotting cutter according to claim 2, characterized in that: The helical angle of the helical cutting edge (31) is 15°-25°.

4. The spiral slotting cutter according to claim 1, characterized in that: The front angle α of the axially lower cutting blade (3) is 15°-25°, and the back angle β of the axially lower cutting blade (3) is 15°-25°.

5. The spiral slotting cutter according to claim 1, characterized in that: A chip removal surface (21) is provided on the opposite side of the installation groove (22).

6. The spiral slotting cutter according to claim 5, characterized in that: The axial lower cutting edge is embedded in the side wall of the cutter head (2), and three side surfaces of the mounting groove (22) are embedded with three side surfaces of the axial lower cutting blade (3).

7. The spiral slotting cutter according to claim 1, characterized in that: The axial lower cutting blades (3) in the circumferential direction are arranged to be inclined in a clockwise or counterclockwise direction, and the blade tips of the axial lower cutting blades (3) are overlapped in radial projection.

8. The spiral slotting cutter according to claim 7, characterized in that: The tip of the axially downward cutting blade (3) extends out of the front end surface of the cutter head (2), and the tips of the axially downward cutting blades (3) on the circumference are located on the same circumference.

9. The spiral slotting cutter according to claim 1, characterized in that: A chamfer (23) corresponding to the axially lower cutting blade (3) is provided on the front end surface of the cutter head (2), and the number of the chamfers (23) is consistent with the number of the axially lower cutting blades (3).

10. The spiral slotting cutter according to claim 1, characterized in that: A boss (4) is provided between the knife handle (1) and the knife head (2); the diameter of the knife handle (1) is smaller than the diameter of the boss (4); a groove (5) is provided between the knife handle (1) and the boss (4); the groove (5) is arranged along the circumference of the knife handle (1).

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