A profiled floor lock forming combined milling cutter

Abstract

This invention discloses a combination milling cutter for forming interlocking patterns on irregularly shaped floorboards, relating to the field of flooring machining tooling technology. It includes a cylindrical cutter body with a T-shaped cross-section. Along the outer circumference of the cutter body, a lower chamfering cutter, an interlocking cutter, and an upper chamfering cutter are sequentially arranged along the axial direction, with their rotation axes coinciding with the cutter body's axis. This allows for simultaneous interlocking of the floorboard side edges, end face trimming, and chamfering of the upper and lower surface edges in a single pass. This invention is adaptable to the full-contour interlocking processing of various non-quadrilateral floorboards, such as triangular, hexagonal, and curved shapes. It effectively solves the technical problems of poor tooling compatibility, high chipping rate, rapid tool wear, and poor cumulative accuracy across multiple processes, significantly improving the processing efficiency and yield of interlocking patterns on irregularly shaped floorboards, and meeting the industrial mass production needs of existing CNC machining equipment.

Description

Technical Field

[0001] This invention relates to the field of flooring processing cutting tools, and in particular to a combined forming milling cutter suitable for processing non-quadrilateral irregular flooring latches. It can be widely used in CNC milling processing of irregular side latches of various floor decoration materials such as SPC stone plastic flooring, WPC wood plastic flooring, engineered wood flooring, and solid wood flooring. Background Technology

[0002] Currently, the side locking structure of click-lock flooring is generally machined using form milling cutters. Existing milling cutter products are all designed for the straight sides of quadrilateral (rectangular, square) flooring, with a continuous, uniform cross-section circular cutting structure, which can only complete the locking groove machining of straight sides. With the rise in market demand for irregularly shaped parquet flooring, the locking machining of non-quadrilateral substrates (triangular, hexagonal, curved, etc.) has placed new demands on cutting tools, and existing cutting tool technology has significant limitations: Firstly, existing standard forming milling cutters are only suitable for machining straight side edges. When faced with complex contours such as inner corners, concave arcs, and wavy curves of irregularly shaped floors, there are problems such as machining interference and dimensional deviations. They cannot guarantee the consistency and continuity of the locking cross-section shape, making it difficult to meet the machining requirements of continuous locking around the entire circumference of irregularly shaped floors. Secondly, the inner corners and concave arcs of irregularly shaped flooring are stress concentration areas. When machining with ordinary milling cutters, the cutting force changes abruptly, which can easily cause the edges and corners of the substrate to chip and the thin walls of the locking mechanism to break. This is especially true for brittle substrates such as SPC and WPC, where the chipping defect rate is even higher. Furthermore, when machining irregular arcs and inner corner contours, the local contact stress of the cutting edge increases significantly, and the cutting heat dissipation is poor, leading to rapid wear and chipping of the cutting edge. The lifespan of ordinary carbide end mills for machining irregular floor surfaces is only about 30% of that for machining quadrilateral floor surfaces, resulting in high tool costs. Finally, the existing process requires multiple tools such as grooving knife, trimming knife, and chamfering knife to process in separate steps. Multiple clamping and tool changing will generate cumulative positioning errors, resulting in a decrease in the splicing accuracy of irregular floor locks. At the same time, the multi-step processing significantly reduces production efficiency and is difficult to adapt to the pace of industrial mass production.

[0003] Therefore, developing a locking machining combination milling cutter that can adapt to various non-quadrilateral irregular contours, perform multiple processes in one step, has low edge chipping, and a long service life is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0004] To address the aforementioned shortcomings of existing technologies, the present invention aims to provide a combination milling cutter for forming irregular contour floorboards with locking mechanism. This cutter solves the problems of existing floorboard milling cutters being unable to adapt to the processing of non-quadrilateral irregular contours, resulting in high edge chipping rates, rapid tool wear, and poor accuracy and efficiency in multi-process processing. It enables one-pass forming of locking mechanism on the entire circumference of irregular floorboards, improving processing accuracy and yield, and reducing tool wear and production costs.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A combination milling cutter for locking and forming irregular contour floor, comprising a cylindrical cutter body with a T-shaped cross-section; The outer periphery of the cutter body is provided with a lower chamfering cutter, a locking forming cutter and an upper chamfering cutter arranged in sequence along the axial direction, with the rotation axis coinciding with the axis of the cutter body. It can complete the locking forming of the side of the floor, the end face trimming and the edge chamfering of the upper and lower surface edges in one pass. The locking forming tool includes a straight cutting section for processing the locking on the side of the floor, a locking protrusion cutting section for processing the locking protrusion on the side of the floor, and a locking groove cutting section for processing the locking groove on the side of the floor. The "I" part of the T-shaped cutter body has a radial horizontal platform portion and an axial horizontal side portion. The "I" part of the cutter body has an axial vertical side portion. The horizontal platform portion is located between the horizontal side portion and the vertical side portion, and the horizontal side portion is farther away from the cutter body axis than the vertical side portion. The horizontal side portion, the horizontal platform portion, and the vertical side portion constitute the locking forming cutter. The locking protrusion cutting section is located on the vertical side portion, and the locking groove cutting section is located on the horizontal side portion. Both the horizontal side portion and the vertical side portion have straight cutting sections.

[0006] The present invention, as defined by the above technical solution, can be used to process flooring with relatively elasticity and thinness. When splicing such flooring, it only requires the interlocking of the corresponding processed parts of the horizontal and vertical sides of the adjacent flooring and the cutting body, with the locking protrusions and locking grooves engaging. Utilizing good elasticity and because the flooring is relatively thin, it can meet the requirement of flat assembly.

[0007] Furthermore, the combined milling cutter also has a profile cutter, which is used to process a certain depth along the axial direction of the cutter body on the side platform of the floor, forming adjacent locking slots and locking heads on the side platform of the floor, which are used to engage with the corresponding locking heads and locking slots of the adjacent floor when splicing with the floor. The side platform of the floor corresponds to the horizontal platform part of the cutter body.

[0008] The above technical solution is suitable for thicker flooring and flooring materials with poor elasticity. Of course, it can also be applied to flooring of all types, making the joint between adjacent floorboards more secure and the floor surface flatter after splicing.

[0009] Furthermore, the cross-sectional profile of the locking forming knife is completely complementary to the cross-sectional shape of the floor lock.

[0010] Furthermore, the combined milling cutter can process two adjacent floorboards simultaneously, and the side locking structures of the two floorboards are completely identical after processing.

[0011] Furthermore, the lower chamfering cutter, the locking forming cutter, and the upper chamfering cutter, which are axially arranged sequentially on the cutter body, are installed in opposite directions and are used to process the floor that is spliced ​​with the floor processed by the aforementioned combined milling cutter.

[0012] When assembling floorboards, the side structures of adjacent floorboards are different. For example, if the side platform of one floorboard faces upwards, the side platform of the floorboard it is to be assembled with should face downwards. By using their respective interlocking structures to fit and lock together, the side platforms of both floorboards also cooperate, resulting in a flat surface after assembly. This is also known in the industry as a yin-yang interlocking structure. This invention only requires adjusting the installation order of the lower chamfering cutter, the interlocking forming cutter, and the upper chamfering cutter to achieve the yin-yang interlocking structure for assembled floorboards. Of course, all of these can be used in conjunction with a contour cutter.

[0013] The irregular contour flooring referred to in this invention includes polygonal substrates and curved contour substrates; the polygonal substrate includes any one of equilateral triangles, isosceles triangles, regular hexagons, rhombuses, and trapezoids; the curved contour substrate includes any one of irregular contour substrates with wavy lines, S-shaped curves, and Bézier curves on the sides.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention features a segmented cutting edge design and a T-shaped cross-section structure for the cutter body, which can simultaneously adapt to various irregular side shapes. It can meet the processing requirements of continuous interlocking structures with no breaks in the entire perimeter of various non-quadrilateral flooring, such as triangles, hexagons, waves, and S-shapes. This breaks through the limitation of traditional milling cutters that can only process straight sides, and supports the processing of various irregular parquet flooring shapes to meet the aesthetic needs of different consumers.

[0015] 2. This invention integrates grooving, trimming, chamfering, and hole enlargement, completing the entire locking process in a single pass without multiple tool changes. This eliminates the cumulative positioning errors from multiple processes, improving the locking dimensional accuracy by over 40%. Furthermore, it can process two flooring units simultaneously; simply reversing the tool direction allows for the processing of another type of flooring with the corresponding locking mechanism. Processing efficiency is over 60% higher than traditional multi-process methods, making it suitable for industrial mass production, especially for irregularly shaped non-quadrilateral flooring.

[0016] 3. The installation dimensions and interface standards of this invention are compatible with existing CNC machining equipment for flooring, and can be quickly put into use without additional production line modifications. It is easy to promote and implement, and provides reliable equipment and technical support for the large-scale production of irregular parquet flooring. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the irregular contour floor locking and forming combination milling cutter described in this invention; wherein... Figure 1 a and Figure 1 b represents two configurations of the same cutting tool installed in reverse, used for processing interlocking floorboards; Figure 2 This is a partially enlarged schematic diagram of the combined milling cutter in this invention; Figure 3 This is a schematic diagram of the grooving process using the profile cutter of the present invention; Figure 4 This is a schematic diagram illustrating the process of simultaneously processing two floorboards according to the present invention; wherein Figure 4 'a' represents the state to be processed. Figure 4 b represents the processing state.

[0019] In the diagram: 1-blade body, 11-horizontal platform section, 12-horizontal side section, 13-vertical side section, 2-upper chamfering blade, 3-lower chamfering blade, 4-locking forming blade, 41-locking protrusion cutting section, 42-locking groove cutting section, 5-profile blade, 6-floor, 61-locking clip head, locking slot. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0022] Please refer to Figures 1-4 A combination milling cutter for locking and forming irregular contour floor, comprising a cylindrical cutter body 1 with a T-shaped cross-section; The outer periphery of the cutter body 1 is provided with a lower chamfering cutter 3, a locking forming cutter 4 and an upper chamfering cutter 2 arranged in sequence along the axial direction, with the rotation axis coinciding with the axis of the cutter body. It can complete the locking forming of the side of the floor, the end face trimming and the edge chamfering of the upper and lower surface edges in one pass. The locking forming cutter 4 includes a straight cutting section for processing the locking on the side of the floor, a locking protrusion cutting section 41 for processing the locking protrusion on the side of the floor, and a locking groove cutting section 42 for processing the locking groove on the side of the floor. The "I" part of the T-shaped cutter body 1 has a radial horizontal platform portion 11 and an axial horizontal side portion 12. The "I" part of the cutter body has an axial vertical side portion 13. The horizontal platform portion 11 is located between the horizontal side portion 12 and the vertical side portion 13, and the horizontal side portion is farther away from the axis of the cutter body than the vertical side portion. The horizontal side portion, the horizontal platform portion, and the vertical side portion constitute the locking forming cutter 4. The locking protrusion cutting section 41 is located on the vertical side portion 13, and the locking groove cutting section 42 is located on the horizontal side portion 12. Both the horizontal side portion and the vertical side portion have straight cutting sections.

[0023] The aforementioned combination of cutting tools can be used to process flooring with good elasticity and thinness. When splicing such flooring, it only requires the interlocking of the corresponding machined parts on the horizontal and vertical sides of the cutting tool with the corresponding locking protrusions and locking grooves. Taking advantage of the good elasticity and the thinness of the flooring, it can meet the requirement of flat assembly.

[0024] Furthermore, the combined milling cutter in this embodiment also has a profile cutter 5, which is used to process a certain depth along the axial direction of the cutter body on the side platform of the floor, forming adjacent locking grooves 62 and locking heads 61 on the side platform of the floor 6, which are used to engage with the corresponding locking heads and locking grooves of the adjacent floor when spliced ​​with the floor 6. The side platform of the floor corresponds to the horizontal platform part of the cutter body.

[0025] The combination of cutting tools after adopting the profile cutter 5 is suitable for thicker flooring and flooring materials with poor elasticity. Of course, it can also be used for all types of flooring, making the joint between adjacent flooring more secure and the surface of the flooring flatter.

[0026] In this embodiment and in the technical solution defined by this invention, the cross-sectional profile of the locking forming knife is completely complementary to the cross-sectional shape of the floor lock, such as... Figure 4 .

[0027] like Figure 4As shown, this embodiment can process two adjacent floorboards 6 simultaneously, and the side locking structures of the two floorboards are completely identical after processing. Figure 4 After the processing shown, adjacent locking heads and locking slots can be machined axially on the side platform of the floor using the profile cutter 5.

[0028] from Figure 1 middle Figure 1 a and Figure 1 As can be seen from b, the lower chamfering cutter, the locking forming cutter, and the upper chamfering cutter, which are arranged axially on the cutter body in the two figures, are installed in opposite directions. They are used to process the floor that is spliced ​​with the floor of the aforementioned combined milling cutter, that is, to process the interlocking negative plate and the anode respectively.

[0029] When assembling floorboards, the side structures of adjacent floorboards are different. For example, if the side platform of one floorboard faces upwards, the side platform of the floorboard it is to be assembled with should face downwards. By using their respective interlocking structures to fit and lock together, the side platforms of the two floorboards also cooperate, resulting in a flat surface after assembly. This is also known in the industry as a yin-yang interlocking structure. This invention only requires adjusting the installation order of the lower chamfering cutter, the interlocking forming cutter, and the upper chamfering cutter to achieve the yin-yang interlocking structure for assembled floorboards. Of course, all of these can be used in conjunction with a contour cutter.

[0030] It should be noted that the combination milling cutter of the present invention is not limited to the floor processing scenarios listed in the above embodiments. The combination cutter of the present invention can be adapted to various materials such as WPC, reinforced composite, solid wood and other substrates, as well as the locking processing of various irregularly shaped floorboards with outer contours such as triangle, rhombus, wave, and S.

[0031] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions should all be covered within the scope of protection of the present invention.

Claims

1. A combination milling cutter for locking and forming irregularly shaped floor panels, characterized in that, Includes a cylindrical cutter body with a T-shaped cross-section. The outer periphery of the cutter body is provided with a lower chamfering cutter, a locking forming cutter and an upper chamfering cutter arranged in sequence along the axial direction, with the rotation axis coinciding with the axis of the cutter body. It can complete the locking forming of the side of the floor, the end face trimming and the edge chamfering of the upper and lower surface edges in one pass. The locking forming tool includes a straight cutting section for processing the locking on the side of the floor, a locking protrusion cutting section for processing the locking protrusion on the side of the floor, and a locking groove cutting section for processing the locking groove on the side of the floor. The "I" portion of the T-shaped cutter body has a radial horizontal platform portion and an axial horizontal side portion. The "I" portion of the cutter body has an axial vertical side portion. The horizontal platform portion is located between the horizontal and vertical side portions, and the horizontal side portion is farther from the cutter body axis than the vertical side portion. The horizontal side portion, the horizontal platform portion, and the vertical side portion constitute the locking forming cutter. The locking protrusion cutting section is located on the vertical side portion, and the locking groove cutting section is located on the horizontal side portion. Both the horizontal and vertical side portions have straight cutting sections.

2. The irregular contour floor locking and forming combination milling cutter according to claim 1, characterized in that, The combined milling cutter also has a profile cutter, which is used to process a certain depth along the axial direction of the cutter body on the side platform of the floor, forming adjacent locking slots and locking heads on the side platform of the floor, which are used to engage with the corresponding locking heads and locking slots of the adjacent floor when splicing with the floor. The aforementioned floor side platform corresponds to the horizontal platform portion of the blade body.

3. The irregular contour floor locking and forming combination milling cutter according to claim 1, characterized in that, The cross-sectional profile of the locking forming knife is completely complementary to the cross-sectional shape of the floor lock.

4. The irregular contour floor locking and forming combination milling cutter according to claim 1, characterized in that, The combined milling cutter can process two adjacent floorboards simultaneously, and the side locking structures of the two floorboards are completely identical after processing.

5. The irregular contour floor locking and forming combination milling cutter according to claim 1, characterized in that, The lower chamfering cutter, the locking forming cutter, and the upper chamfering cutter, which are arranged axially on the cutter body and installed in opposite directions, are used to process the floor panels that are spliced ​​with the floor panels processed by the aforementioned combined milling cutters.

6. The irregular contour floor locking and forming combination milling cutter according to any one of claims 1-5, characterized in that, The irregular contour floor includes a polygonal substrate and a curved contour substrate; the polygonal substrate includes any one of an equilateral triangle, an isosceles triangle, a regular hexagon, a rhombus, and a trapezoid; the curved contour substrate includes any one of an irregular contour substrate with wavy lines, S-shaped curves, and Bézier curves on its sides.

7. The application of the irregular contour floor locking and forming combination milling cutter according to claim 6 in the CNC milling of non-quadrilateral irregular floor.

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