Eight-edge efficient wear-resistant peeling cutter

Abstract

The invention discloses an eight-edge efficient wear-resistant peeling cutter which comprises a blade body of an eight-edge prism structure, the blade body is provided with mounting end faces which are symmetrical up and down and identical in structure, four sets of cutting structures are evenly and alternately arranged on the side face of the blade body, and each set comprises a sleeking edge, a cutting tool nose and a main cutting edge. Corresponding to the sleeking edge, first chip grooves with arc-shaped groove walls are formed in the upper end face and the lower end face, and chip control blocks used for containing, breaking and guiding chips are further arranged in the grooves. And a second chip removal groove with a linear groove wall is formed corresponding to the main cutting edge so as to provide a stable support and chip removal space. According to the scheme, through the eight-edge high-density design, the number of effective cutting edges is increased under the condition of equal material consumption, and the machining efficiency can be improved; according to the chip removal groove structure, collaborative optimization of the cutting function and the sleeking function is achieved, smooth chip removal and stable machining are guaranteed, and the chip removal groove structure is better suitable for efficient and high-quality surface peeling machining of metal bars or pipe fittings.

Description

Technical Field

[0001] This invention relates to a cutting tool for removing coatings, rust, and other deposits from the surface of metal rods or pipes, and in particular to a multi-bladed peeling tool, belonging to the field of metal outer surface processing technology. Background Technology

[0002] In the subsequent processing or reuse of metal bars or pipes, their surfaces are often covered with oxide layers, coatings, rust, or other adhering impurities. These surface defects directly affect the performance of the material. To obtain a clean and uniform substrate surface, mechanical peeling is commonly used, which involves removing the surface material through rotary cutting. Currently, the traditional peeling tools widely used in the industry are mostly four- or six-flute structures. The four- or six-flute design balances cutting force and tool rigidity to a certain extent. This type of tool can be mounted on rotary equipment such as lathes and dedicated peeling machines, where the equipment drives the tool to rotate at high speed, and the workpiece is fed axially to achieve continuous cutting of the outer circumference of the workpiece. However, with the continuous improvement of modern machining requirements for cutting efficiency, precision, and tool life, although traditional four- or six-flute peeling tools can achieve relatively continuous peeling in practical applications, they are gradually showing some limitations:

[0003] (1) Limited number of cutting edges leads to large single-edge load: During high-speed or large-feed machining, the cutting force on a single cutting edge is large, and the cutting amount of the tool is limited per unit time, which can easily cause the tip wear to increase and affect the tool service life, especially in the processing of large-diameter or long-sized workpieces;

[0004] (2) The cutting stability of the blade needs to be improved: During the continuous peeling process, the chip removal space and cutting rhythm of the six-flute structure still fluctuate, which can easily lead to increased local wear of the blade, shorten the tool life, and also affect the consistency of surface processing, affecting the surface processing effect and smoothness.

[0005] (3) Insufficient wear resistance of the blade: For metal workpieces with high hardness or uneven coating, the six-blade structure is prone to tool wobble due to uneven force, which affects the machining accuracy and safety. Moreover, the blade tip is prone to chipping or wear too quickly, requiring frequent tool changes and affecting the continuity of operation.

[0006] To address the aforementioned issues, industry experts have attempted to improve cutting stability and efficiency by increasing the number of cutting edges. However, optimizing the cutting geometry parameters, balancing the load on each edge to ensure smooth chip removal, and simultaneously considering tool strength and durability remain key challenges in existing technologies. Therefore, this invention proposes an eight-edge high-efficiency, wear-resistant peeling tool. By increasing the number of cutting edges, optimizing the edge layout, and strengthening the tool tip structure, it aims to achieve more efficient, stable, and durable continuous peeling operations. Summary of the Invention

[0007] The purpose of this invention is to solve the above-mentioned problems and provide an eight-blade high-efficiency anti-wear peeling tool, so as to fundamentally improve the structural load and cutting dynamics characteristics of the tool when facing high-load and high-continuity machining scenarios.

[0008] The technical solution of this invention is: an eight-blade high-efficiency anti-wear peeling tool, comprising an octagonal prism-shaped blade body. The blade body has an upper mounting end face and a lower mounting end face that are axially opposite to each other and have identical structures. On the side surface of the blade body, four sets of cutting structures are uniformly and alternately arranged circumferentially. Each set of cutting structures includes a finishing edge, a cutting tip, and a main cutting edge connected in sequence. The cutting tip is a tangential transition arc between the finishing edge and the main cutting edge. On the side surface area of ​​the blade body corresponding to each finishing edge, a first chip removal groove that is radially mirror-symmetrical is provided. The first chip removal groove on the upper side extends downward from the upper mounting end face, and the first chip removal groove on the lower side extends upward from the lower mounting end face. On the side surface area of ​​the blade body corresponding to each main cutting edge, a second chip removal groove that is radially mirror-symmetrical is provided. The second chip removal groove on the upper side extends downward from the upper mounting end face, and the second chip removal groove on the lower side extends upward from the lower mounting end face. Multiple chip control blocks are provided on the second chip removal groove.

[0009] Furthermore, the above-mentioned eight-blade high-efficiency anti-wear peeling knife is characterized in that: both the upper mounting end face and the lower mounting end face are outwardly convex surfaces, and the thickness of both the upper mounting end face and the lower mounting end face is between 4.5mm and 12mm.

[0010] Furthermore, the above-mentioned eight-blade high-efficiency anti-wear peeling tool is characterized in that: the inner wall of the first chip removal groove is arc-shaped, and the inner wall of the second chip removal groove is straight.

[0011] Furthermore, the above-mentioned eight-blade high-efficiency anti-wear peeling tool is characterized in that: the chip control block is a semi-conical or pyramidal protrusion, and multiple chip control blocks are arranged in a single row or multiple rows in an alternating manner along the extension direction of the second chip discharge groove. Each chip control block has an inclined guide surface facing the chip discharge direction and is distributed in the middle or rear region of the chip flow direction to guide the chip flow.

[0012] Furthermore, the aforementioned eight-blade high-efficiency anti-wear peeling tool is characterized by: a central hole being provided at the center of the blade body, which is an internally threaded hole, a tapered hole, or a shaft hole with a keyway; in a cross-section perpendicular to the axis of the blade body, in a single cutting structure, the finishing blade and the main cutting blade form an angle of 155° to 160°; and the outer and inner arcs of the cutting tip are non-concentric, with the outer arc radius between 4mm and 15mm and the inner arc radius between 10mm and 25mm.

[0013] Compared with existing technologies, this invention rationally sets up an eight-blade peeling cutter structure. While maintaining the basic working principle of rotary cutting, under the same conditions as traditional four-blade or six-blade peeling cutters, the eight-blade peeling cutter can directly increase the total cutting time of the product by more than 13%, reduce the cost of use, and is suitable for continuous surface treatment of various metal bars or pipes. It can serve as a workpiece with significantly improved cutting performance in related industries. Moreover, its chip removal groove adopts a combination of straight and arc-shaped grooves, providing ample chip space to ensure continuous chip removal during continuous chip removal, fundamentally eliminating the risk of processing vibration, tool tip damage, or tool scrap caused by chip blockage or entanglement. In addition, under the premise of consuming the same weight of expensive tungsten resources, this invention produces more effective cutting edges through a new structural design with multiple blades, thereby reducing raw material costs and having good economic value. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 Top view of the present invention Figure 1 ;

[0016] Figure 3 Top view of the present invention Figure 2 ;

[0017] Figure 4 This is the front view of the present invention;

[0018] Figure 5 This is a schematic cross-sectional view of the present invention along the AA direction;

[0019] Figure 6 This is a schematic diagram of the structure of the present invention assembled with a dedicated tool holder;

[0020] Figure 7 These are images showing the morphology of the debris from the workpiece after the cutting operation of the tool according to the present invention.

[0021] Figure 8 Images showing the morphology of debris from the workpiece after cutting operations with other cutting tools.

[0022] The meanings of the labels in the figures are as follows: 1-Insert body, 2-Upper mounting face, 3-Lower mounting face, 4-Center hole, 5-Cutting structure, 51-Finishing edge, 52-Cutting tip, 53-Main cutting edge, 6-First chip removal groove, 7-Second chip removal groove, 8-Chip control block, 9-Special tool holder. Detailed Implementation

[0023] To more intuitively illustrate the technical solution of the present invention, several specific exemplary embodiments are described below with reference to the accompanying drawings. It should be particularly noted that the accompanying drawings and descriptions of related embodiments are illustrative in nature and are intended to aid in understanding the present invention, and should not be construed as limiting the scope of protection of the present invention in any way. For those skilled in the art, any reasonable modifications, simple substitutions, or equivalent improvements made to the present invention based on a full understanding of its design concept, as long as they do not depart from the technical essence of the present invention, shall fall within the scope of protection claimed by the present invention.

[0024] like Figures 1-6 As shown, this invention provides an eight-blade high-efficiency anti-wear peeling tool, comprising an octagonal prism-shaped blade body 1. The blade body 1 has an upper mounting end face 2 and a lower mounting end face 3 that are axially opposite to each other and have identical structures. A central hole 4 is provided on the blade body 1. The central hole 4 is an internally threaded hole, a tapered hole, or a shaft hole with a keyway. In most application scenarios, the peeling tool is fixedly installed through the central hole 4, while the metal rod or pipe to be processed is fed by movement. In actual processing, there are both left-side and right-side feeding, so the peeling tool has a direction. It is easy for those skilled in the art to know that, depending on the feeding direction, the corresponding groove position of the peeling tool can be symmetrically interchanged to adapt to the situation, so this invention will not elaborate on this.

[0025] According to the technical solution of the present invention, four sets of cutting structures 5 are uniformly and alternately arranged circumferentially on the side surface of the blade body 1. Each set of cutting structures 5 includes a finishing blade 51, a cutting tip 52, and a main cutting edge 53 connected in sequence. The cutting tip 52 is a tangential transition arc between the finishing blade 51 and the main cutting edge 53. On the side surface area of ​​the blade body 1 corresponding to each finishing blade 51, a first chip removal groove 6 is provided in a radially mirror-symmetrical manner. The first chip removal groove 6 located on the upper side extends downward from the upper mounting end face 2, and the first chip removal groove 6 located on the lower side extends upward from the lower mounting end face 3. On the side surface area of ​​the blade body 1 corresponding to each main cutting edge 53, a second chip removal groove 7 is provided in a radially mirror-symmetrical manner. The second chip removal groove 7 located on the upper side extends downward from the upper mounting end face 2, and the second chip removal groove 7 located on the lower side extends upward from the lower mounting end face 3. A plurality of chip control blocks 8 are provided on the second chip removal groove 7.

[0026] Preferably, in the above structure, both the upper mounting end face 2 and the lower mounting end face 3 are outwardly convex surfaces, and the thickness of the upper mounting end face 2 and the lower mounting end face 3 is between 4.5mm and 12mm. In use, the operator first checks the upper mounting end face 2 and the lower mounting end face 3 of the blade body 1. Since their structures are identical, either unworn or minimally worn mounting end face can be freely selected as the mounting reference surface based on the wear condition of the first working surface. The selected mounting end face (e.g., the upper mounting end face 2) is tightly fitted onto the end of the special tool holder 9 (which has a taper, groove, or key adapted to the blade body 1), and locked in place by a locking nut, elastic retaining ring, or quick-locking sleeve passing through the central hole 4.

[0027] Preferably, in the above structure: the inner wall of the first chip removal groove 6 is arc-shaped; the inner wall of the second chip removal groove 7 is straight. The straight second chip removal groove 7 mainly performs efficient and powerful chip removal, ensuring the stability and efficiency of the cutting process; the arc-shaped first chip removal groove 6 mainly performs chip cleaning, stress equalization, and effective heat dissipation, ensuring surface quality and tool durability. The synergistic combination of the first chip removal groove 6 and the second chip removal groove 7 not only provides a larger effective chip holding space, but also improves the overall performance, ensuring that the peeling tool can complete the entire process from removing the surface excess of metal rods or pipes to finishing the surface in a single pass, thus improving the overall processing efficiency.

[0028] Preferably, in the above structure: the chip control block 8 is a semi-conical or conical protrusion, especially a conical protrusion, which can actively break chips, guide chips, and reduce chip friction, indirectly reducing the cutting temperature. Simultaneously, it allows for the effective curling and discharge of small amounts of chips, preventing chip entanglement and damage to the equipment or workpiece caused by chip entanglement. Multiple chip control blocks 8 are arranged in a single or multiple staggered rows along the extension direction of the second chip discharge groove 7. Each chip control block 8 has an inclined guide surface facing the chip discharge direction and is distributed in the middle or rear region of the chip flow direction to guide chip flow.

[0029] Preferably, in the above structure: on a cross-section perpendicular to the axis of the blade body 1, in a single cutting structure, the finishing edge 51 and the main cutting edge 53 form an angle, the angle ranging from 155° to 160°. Specifically, as shown... Figure 2 and Figure 3 As shown, in the structure of the above-mentioned eight-blade high-efficiency anti-wear peeling tool, the included angles a and b between the finishing blade 51 and the two adjacent main cutting blades 53 are between 20° and 25° and 110° and 115°, respectively.

[0030] More preferably, in the above structure: the outer and inner arcs of the cutting tip 52 are non-concentric, with the outer arc radius between 4mm and 15mm and the inner arc radius between 10mm and 25mm. This cutting tip 52 structure avoids the disadvantages of high cutting resistance, high cutting temperature, and heavy machine tool load caused by excessive width of the main cutting edge, while improving the tip's resistance to chipping and improving the overall cutting service life of the peeling tool. Because the non-concentric design allows the cutting edge width of the tip to be greater than the width of the main cutting edge and the finishing edge, with a gradual change in width, reaching its maximum at the intersection of the main cutting edge and the finishing edge, this improves the structural strength of the tip without reducing the sharpness of the main cutting edge. In contrast, with a concentric design, the bandwidth of the main cutting edge, the bandwidth of the tip edge, and the bandwidth of the finishing edge will change simultaneously if one of them changes, making it impossible to achieve both sharpness and structural strength.

[0031] The key technical aspect of this invention lies in the combination of the eight-blade structure that integrates "enhanced cutting" and "dedicated finishing" functions, the chip removal groove structure that employs a combination of straight and arc shapes, and the chip control block 8, which is installed inside the straight second chip removal groove 7 and has functions of accommodating chips, actively breaking chips, and guiding chip debris. Figure 7 and Figure 8The images show a comparison of the chip morphology of the workpiece after cutting with the tool in this case with that of other tools under the same working conditions (i.e., the workpiece being machined is 316 stainless steel bar, the linear speed is 90 m / min, the feed rate is 5 m / min, and the depth of cut is 2.5 mm). Observation shows that the chips obtained by the tool in this case are mostly short and fine "C"-shaped chips, while the chips obtained by other tools are mostly disordered fragmented blocks or long and continuous ribbon-like chips. Therefore, it is evident that the cutting tool in this case eliminates the risk of long chip entanglement. Long, ribbon-like chips pose a significant safety hazard in rotary machining, easily becoming entangled in the cutting tool, workpiece, or machine tool, potentially leading to tool breakage, workpiece damage, or even personal injury. In contrast, fine chips can be easily flung away from the machining area. Simultaneously, it achieves rapid heat dissipation. Chips are the primary carriers of cutting heat, and fine chips, with their larger specific surface area, can carry away more heat during generation and discharge than long, ribbon-like chips. This ensures that the cutting tool, operating at relatively low temperatures, can effectively extend its service life and maintain its base strength. Furthermore, it effectively prevents secondary scratches on the machined surface caused by chips. Long or large chips, with their hard and sharp edges, can easily scratch the already smoothed workpiece surface during discharge. However, fine chips, with their small mass and low inertia, are easily flung away by centrifugal force, preventing severe scratching of the workpiece surface. For components such as the mounting end face, center hole 4, and special tool holder 9, those skilled in the art can simply make conventional settings based on existing technology for the overall size design of the blade body 1. There are no special requirements for the selection of its models and its combination in this case.

[0032] Thus, by adopting the technical solution of the present invention, after assembling the special tool holder 9 and the blade body 1 (as shown in the figure), Figure 6 As shown, the blade body 1 is mounted and fixed on a rotary drive device via an adapter cutter head; the blade body 1 is driven to rotate at high speed around its axis; the metal bar or pipe to be processed is fed along its axis, so that its outer surface contacts the rotating peeling cutter; during the feeding process, the cutting structure 5 starts to work continuously, and the main cutting edge 53 performs rough cutting on the workpiece surface to remove coatings or rust, and then the finishing edge 51 squeezes the cut surface to remove surface burrs and reduce surface roughness, so as to complete the peeling and surface finishing of the workpiece in continuous feeding.

[0033] As can be seen from the above description, compared with the prior art, after adopting the technical solution of this invention, while ensuring the basic working principle of rotary cutting, the systematic improvement of the eight-flute peeling tool structure enhances the wear resistance and service life of the tool. Under the same operating conditions as traditional four-flute or six-flute peeling tools, at the same cutting speed, the eight-flute peeling tool allows for a higher feed rate; at the same feed rate, the eight-flute peeling tool achieves a better surface texture. The eight-flute peeling tool can directly increase the total cutting time of the product by more than 13%, reduce usage costs, and is suitable for continuous surface treatment of high-hardness alloy pipes or bars. It can serve as a workpiece that significantly improves cutting performance in related industries. Furthermore, its chip removal groove uses a combination of straight and arc shapes, providing ample chip space to ensure continuous chip removal during continuous cutting, fundamentally eliminating the risk of machining vibration, tool tip damage, and tool scrap caused by chip clogging or entanglement. In addition, since peeling tools are mostly made of tungsten and other hard alloys with coatings, this case, through a new structure design with multiple blades, can produce more effective cutting edges while consuming the same weight of expensive tungsten resources, thus reducing raw material costs and having good economic value.

[0034] The technical solution, working process, and implementation effects of the present invention have been described in detail above. It should be noted that the described examples are only typical examples of the present invention. In addition, the present invention may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by the present invention.

Claims

1. An eight-blade high-efficiency anti-friction skiving tool comprising a blade body (1) in the form of an octagonal prism, characterized in that: The blade body (1) has an upper mounting end face (2) and a lower mounting end face (3) which are oppositely arranged along the axial direction and have the same structure, four groups of cutting structures (5) are uniformly and alternately arranged on the side surface of the blade body (1) in the circumferential direction, each group of the cutting structures (5) comprises a finishing edge (51), a cutting tip (52) and a main cutting edge (53) which are sequentially connected, the cutting tip (52) is a tangent transition circular arc between the finishing edge (51) and the main cutting edge (53); a first chip groove (6) which is mirror-symmetric in the radial direction is arranged on the side surface area of the blade body (1) corresponding to each finishing edge (51), the first chip groove (6) on the upper side is formed by extending downward from the upper mounting end face (2), and the first chip groove (6) on the lower side is formed by extending upward from the lower mounting end face (3); a second chip groove (7) which is mirror-symmetric in the radial direction is arranged on the side surface area of the blade body (1) corresponding to each main cutting edge (53), the second chip groove (7) on the upper side is formed by extending downward from the upper mounting end face (2), and the second chip groove (7) on the lower side is formed by extending upward from the lower mounting end face (3); a plurality of chip control blocks (8) are arranged on the second chip groove (7).

2. An eight-bladed high-efficiency skiving tool according to claim 1, characterized in that: The upper mounting end face (2) and the lower mounting end face (3) are convex surfaces which protrude outward, and the thicknesses of the upper mounting end face (2) and the lower mounting end face (3) are both between 4.5 mm and 12 mm.

3. An eight-bladed high-efficiency skiving tool according to claim 1, characterized in that: The inner side groove wall of the first chip groove (6) is arranged in an arc shape, and the inner side groove wall of the second chip groove (7) is arranged in a straight line shape.

4. An eight-bladed high-efficiency scrapering tool according to claim 1, characterized in that: The chip control block (8) is a half-conical or pyramid-shaped protrusion, and a plurality of the chip control blocks (8) are arranged in a single row or multiple rows in a staggered manner along the extension direction of the second chip groove (7).

5. An eight-bladed high efficiency abrasive skinning cuter according to claim 4 wherein: Each chip control block (8) has an inclined guide surface facing the chip removal direction and is distributed in the middle or rear area of the chip flow direction, for guiding the chip flow.

6. An eight-bladed high-efficiency, anti-friction, scalping tool according to claim 1 wherein: In a cross section perpendicular to the axis of the blade body (1), in a single group of cutting structures, an included angle is formed between the finishing edge (51) and the main cutting edge (53), and the range of the included angle is 155°-160°.

7. An eight-bladed high-efficiency, anti-friction, scalping tool according to claim 1 wherein: The outer circular arc and the inner circular arc of the cutting tip (52) are designed in a non-concentric manner, the radius of the outer circular arc is between 4 mm and 15 mm, and the radius of the inner circular arc is between 10 mm and 25 mm.

8. An eight-bladed high-efficiency scrapering tool according to claim 1, characterized in that: A central hole (4) is formed in the blade body (1), and the central hole (4) is an internally threaded hole, a tapered hole or a shaft hole with a key groove.

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