Carbide cutter bit with ribbed sides and conical tip

Abstract

Abstract CARBIDE CUTTER BIT WITH RIBBED SIDES AND CONICAL TIP 5 A cutter bit (10) for a work tool on a machine includes a leading end, conical-shaped tip portion (50), a rearward, frustoconical-shaped tip portion (40) extending axially rearwardly from the leading end, conical-shaped tip portion (50), an annular ledge (38) extending radially outwardly from a trailing edge (43) of the rearward, frustoconical-shaped tip portion, a frustoconical-10 shaped body portion (30) extending axially rearwardly from an outer circumferential edge (35) of the annular ledge (38). The cutter bit also includes a plurality of circumferentially-spaced ribs (52, 42, 32) projecting radially outwardly from an outer peripheral surface (54, 44, 34) of at least one of the leading end, conical-shaped tip portion (50), the rearward, frustoconical-shaped 15 tip portion (40), or the frustoconical-shaped body portion (30). Abstract CARBIDE CUTTER BIT WITH RIBBED SIDES AND CONICAL TIP 5 10 15 20 25 27 12 03 24 N ov 2 02 5 2 0 2 5 2 7 1 2 0 3 2 4 N o v 2 0 2 5 C A R B I D E C U T T E R B I T W I T H R I B B E D S I D E S A N D C O N I C A L T I P 5 2 0 2 5 2 7 1 2 0 3 2 4 N o v 2 0 2 5 C A R B I D E C U T T E R B I T W I T H R I B B E D S I D E S A N D C O N I C A L T I P 5

Description

Each of circumferentially-spaced ribs 152, 142 may be axially symmetrical such that a cross-sectional profile of each respective one of the circumferentially-spaced ribs is the same on each of opposite sides of a line that bisects each respective rib and extends in an axial direction of the cutter bit. Each of the circumferentially-spaced ribs may also include a profile that is radially inwardly convex along at least a portion of the axial length of the respective rib. Alternatively, each of the circumferentially-spaced ribs may be radially inwardly convex along a first portion of its respective axial length and radially inwardly concave along a second portion of its respective axial length. Hence, as best seen 2025271203   24 Nov 2025 -12-on the profile of circumferentially-spaced ribs 142 of rearward, frustoconical-shaped tip portion 140 adjacent trailing edge 143, at least a portion of each rib may smoothly transition from a profile that includes a radially inwardly directed cup-shape to a profile that includes a radially outwardly directed cup-shape. In various exemplary embodiments, the axially symmetrical profile of the circumferentially-spaced ribs may be desirable for certain applications, while an axially asymmetrical profile may be desirable for other applications. Circumferentially-spaced ribs 152, 142 enhance rotation of cutter bit 100 as fragments or chips broken away from a substrate by engagement between cutter bit 100 and the substrate flow over outer peripheral surfaces 154 of leading edge, conical-shaped tip portion 150 in between ribs 152, and outer peripheral surfaces 144 of rearward, frustoconical-shaped tip portion 140 in between ribs 142. The fragments or chips encourage rotation of cutter bit 100 about its central axis, thereby encouraging more even wear of cutter bit 100 about its central axis and reducing the occurrence of sparking caused by friction between the fragments or chips and portions of cutter bit 100. As with the embodiment of Figs. 1-3, the disclosed exemplary cutter bit 100 of Figs. 4-6 may be manufactured using conventional techniques such as, for example, casting or molding. Alternatively, the disclosed cutter bit may be manufactured using conventional techniques generally referred to as additive manufacturing or additive fabrication. Known additive manufacturing / fabrication processes include techniques such as, for example, 3D printing. In yet another exemplary embodiment illustrated in Figs. 7-9, a cutter bit 200 may include a leading end, conical-shaped tip portion 250 extending rearwardly from an apex 255 to a rearward edge 253 of leading end, conical-shaped tip portion 250. Cutter bit 200 may also include a rearward, frustoconical-shaped tip portion 240 extending axially rearwardly from a leading edge 245 at leading end, conical-shaped tip portion 250 to a trailing edge 243. Cutter bit 200 may further include an annular ledge 238 extending radially outwardly from trailing edge 243 of rearward, frustoconical-shaped tip portion 2025271203   24 Nov 2025 -13 240. A frustoconical-shaped body portion 230 may extend axially rearwardly from an outer circumferential edge 235 of annular ledge 238 to a trailing edge 233. A cylindrical collar portion 228 may extend axially rearwardly from trailing edge 233 of frustoconical-shaped body portion 230. A trailing end, cylindricalshaped shank portion 220 may extend axially rearwardly from cylindrical collar portion 228. Shank portion 220 may include a connection mechanism 223 for connecting cutter bit 200 to a rotary cutting drum or rotary cutting head. As shown in Figs. 7-9, exemplary cutter bit 200 may also include a plurality of circumferentially-spaced ribs 242 projecting radially outwardly from an outer peripheral surface 244 of rearward, frustoconical-shaped tip portion 240. In the exemplary embodiment of cutter bit 200 shown in Figs. 7-9, leading end, conicalshaped tip portion 250 and frustoconical-shaped body portion 230 are devoid of any ribs. Cutter bit 200 of Figs. 7-9 may be configured as shown with an outer peripheral surface 234 of frustoconical-shaped body portion 230 including a concave profile in an axial direction of cutter bit 200. Similarly, outer peripheral surface 244 of rearward, frustoconical-shaped tip portion 240 may include at least a portion of outer peripheral surface 244 with a concave profile in an axial direction of cutter bit 200. The concave profile or profiles along outer peripheral surfaces of cutter bit 200, in combination with the presence of a plurality of circumferentially-spaced ribs, as discussed below, may enhance the ability of cutter bit 200 to shed fragments of a substance being excavated by cutter bit 200 and reduce wear on cutter bit 200. Cutter bit 200 may include circumferentially-spaced ribs 242 extending in an axial direction of cutter bit 200 between a leading end and a trailing end of rearward, frustoconical-shaped tip portion 240. As further shown in Figs. 7-9, circumferentially-spaced ribs 142 extend in the axial direction and in a radial direction of cutter bit 200 such that each of the circumferentially-spaced ribs has an axial and radial slope directed toward apex 255 of leading end, conical-shaped tip portion 250. In the exemplary embodiment of Figs. 7-9, circumferentially-spaced ribs 242 of rearward, frustoconical-shaped tip portion 2025271203   24 Nov 2025 -14240 slope axially and radially inwardly at an acute angle relative to a central axis of cutter bit 200. Leading end, conical-shaped tip portion 250 is configured with a smooth conical surface 254 extending from apex 255 to rearward edge 253. Each of circumferentially-spaced ribs 242 may be axially symmetrical such that a cross-sectional profile of each respective one of the circumferentially-spaced ribs is the same on each of opposite sides of a line that bisects each respective rib and extends in an axial direction of the cutter bit. Each of the circumferentially-spaced ribs may also include a profile that is radially inwardly convex along at least a portion of the axial length of the respective rib. Alternatively, each of the circumferentially-spaced ribs may be radially inwardly convex along a first portion of its respective axial length and radially inwardly concave along a second portion of its respective axial length. Hence, as best seen on the profile of circumferentially-spaced ribs 242 of rearward, frustoconical-shaped tip portion 240 adjacent trailing edge 243, at least a portion of each rib may smoothly transition from a profile including a radially inwardly directed cup-shape to a profile including a radially outwardly directed cup-shape. In various exemplary embodiments, the axially symmetrical profile of the circumferentially-spaced ribs may be desirable for certain applications, while an axially asymmetrical profile may be desirable for other applications. Circumferentially-spaced ribs 242 enhance rotation of cutter bit 200 as fragments or chips broken away from a substrate by engagement between cutter bit 200 and the substrate flow over outer peripheral surfaces 244 of rearward, frustoconical-shaped tip portion 240 in between ribs 242. The fragments or chips encourage rotation of cutter bit 200 about its central axis, thereby encouraging more even wear of cutter bit 200 about its central axis and reducing the occurrence of sparking caused by friction between the fragments or chips and portions of cutter bit 200. Industrial Applicability The disclosed exemplary cutter bits 10, 100, and 200 of Figs. 1-9 may be manufactured using conventional techniques such as, for example, casting or molding. Alternatively, the disclosed cutter bits may be manufactured 2025271203   24 Nov 2025 -15-entirely or in part using techniques generally referred to as additive manufacturing or additive fabrication. In each of the exemplary embodiments of cutter bits 10, 100, and 200, the respective leading end, conical-shaped tip portion, and / or the respective rearward, frustoconical-shaped tip portion may include tabs or other protrusions (not seen) that are used in the brazing or other joining procedures for assembling the respective tip portion to the respective body and shank of the cutter bit. A cutter bit configured according to the various exemplary embodiments of this disclosure may advantageously encourage rotation of the bit while in use as a result of the flow of the fragments or chips of a substrate material dislodged by the cutter bit across the outer peripheral surfaces of the cutter bit and against the plurality of circumferentially spaced ribs. The circumferentially spaced ribs may also prevent the cutter bit from becoming frozen in place and failing to rotate relative to its holder during use. In various applications it may be desirable to provide a smooth leading end, conical-shaped tip portion, with ribs only provided along a rearward, frustoconical-shaped tip portion and / or a frustoconical-shaped body portion located rearward of the tip portion. The smooth, leading end, conical-shaped tip portion may enhance the ability of the cutter bit to penetrate certain substrates, and may encourage fragments and chips from the substrate to move more quickly into engagement with ribs positioned along the outer peripheral surface of the rearward, frustoconical-shaped tip portion. In other applications, the presence of axially extending ribs along the outer peripheral surfaces of the leading end, conicalshaped tip portion, the rearward, frustoconical-shaped tip portion, and the frustoconical-shaped body portion, or just along the rearward, frustoconical-shaped tip portion, may provide the best combination for effective and efficient removal of substrate material and rotation of the cutter bit. The entire cutter bit according to various exemplary embodiments of this disclosure, or only portions of the cutter bit such as the leading end, conical-shaped tip portion, may be manufactured using 3D printing techniques. 3D printing is an additive manufacturing process wherein material 2025271203   24 Nov 2025 -16may be deposited in successive layers under the control of a computer. The computer controls additive fabrication equipment to deposit the successive layers according to a three-dimensional model (e.g. a digital file such as an AMF or STL file) that is configured to be converted into a plurality of slices, for example substantially two-dimensional slices, that each define a cross-sectional layer of the cutter bit or a portion of the cutter bit in order to manufacture, or fabricate, the cutter bit. In one case, the disclosed cutter bit or portion of a cutter bit would be an original component and the 3D printing process would be utilized to manufacture the part. In other cases, the 3D process could be used to replicate an existing cutter bit and the replicated cutter bit could be sold as aftermarket parts. These replicated aftermarket cutter bit could be either exact copies of the original cutter bit or pseudo copies differing in only non-critical aspects. With reference to Fig. 10, the three-dimensional model 1001 used to represent an original cutter bit may be on a computer-readable storage medium 1002 such as, for example, magnetic storage including floppy disk, hard disk, or magnetic tape; semiconductor storage such as solid state disk (SSD) or flash memory; optical disc storage; magneto-optical disc storage; or any other type of physical memory on which information or data readable by at least one processor may be stored. This storage medium may be used in connection with commercially available 3D printers 1006 to manufacture, or fabricate, the cutter bit. Alternatively, the three-dimensional model may be transmitted electronically to the 3D printer 1006 in a streaming fashion without being permanently stored at the location of the 3D printer 1006. In either case, the three-dimensional model constitutes a digital representation of the cutter bit suitable for use in manufacturing the cutter bit. The three-dimensional model may be formed in a number of known ways. In general, the three-dimensional model is created by inputting data 1003 representing the cutter bit to a computer or a processor 1004 such as a cloud-based software operating system. The data may then be used as a threedimensional model representing the physical cutter bit. The three-dimensional model is intended to be suitable for the purposes of manufacturing the cutter bit. 2025271203   24 Nov 2025 -17 In an exemplary embodiment, the three-dimensional model is suitable for the purpose of manufacturing the cutter bit by an additive manufacturing technique. In one embodiment depicted in Fig. 10, the inputting of data may be achieved with a 3D scanner 1005. The method may involve contacting the cutter bit via a contacting and data receiving device and receiving data from the contacting in order to generate the three-dimensional model. For example, 3D scanner 1005 may be a contact-type scanner. The scanned data may be imported into a 3D modeling software program to prepare a digital data set. In one embodiment, the contacting may occur via direct physical contact using a coordinate measuring machine that measures the physical structure of the cutter bit by contacting a probe with the surfaces of the cutter bit in order to generate a three-dimensional model. In other embodiments, the 3D scanner 1005 may be a non-contact type scanner and the method may include directing projected energy (e.g. light or ultrasonic) onto the cutter bit to be replicated and receiving the reflected energy. From this reflected energy, a computer would generate a computer-readable three-dimensional model for use in manufacturing the cutter bit. In various embodiments, multiple 2D images can be used to create a threedimensional model. For example, 2D slices of a 3D object can be combined to create the three-dimensional model. In lieu of a 3D scanner, the inputting of data may be done using computer-aided design (CAD) software. In this case, the three-dimensional model may be formed by generating a virtual 3D model of the disclosed cutter bit using the CAD software. A three-dimensional model would be generated from the CAD virtual 3D model in order to manufacture the cutter bit. The additive manufacturing process utilized to create the disclosed cutter bit may involve materials such as plastic, rubber, metal, etc. In some embodiments, additional processes may be performed to create a finished product. Such additional processes may include, for example, one or more of cleaning, hardening, heat treatment, material removal, and polishing. Other processes necessary to complete a finished product may be performed in addition to or in lieu of these identified processes. 2025271203   24 Nov 2025 -18- It will be apparent to those skilled in the art that various modifications and variations can be made to the disclosed cutter bits. Other embodiments will be apparent to those skilled in the art from consideration of the specification. It is intended that the specification and examples be considered as 5 exemplary only, with a true scope being indicated by the following claims and their equivalents. Reference to any prior art in the specification is not an acknowledgement or suggestion that this prior art forms part of the common general knowledge in any jurisdiction or that this prior art could reasonably be 10 expected to be combined with any other piece of prior art by a skilled person in the art. By way of clarification and for avoidance of doubt, as used herein and except where the context requires otherwise, the term "comprise" and variations of the term, such as "comprising", "comprises" and "comprised", are 15 not intended to exclude further additions, components, integers or steps.

Claims

2025271203   24 Nov 2025-19-Claims1. A method for manufacturing a leading end, conical-shaped tip portion of a cutter bit using a computer-readable, three-dimensional model, wherein the computer-readable, three-dimensional model is suitable for use in manufacturing at least the leading end, conical-shaped tip portion of a cutter bit, wherein the leading end, conical-shaped tip portion includes a plurality of circumferentially-spaced ribs projecting radially outwardly from an outer peripheral surface of the leading end, conical-shaped tip portion, each rib extending rearwardly from a front end apex of the leading end, conical-shaped tip portion and including opposite side surfaces spaced from each other and projecting radially outwardly from the outer peripheral surface at an angle greater than zero degrees and less than 180 degrees relative to the outer peripheral surface, and the computer-readable three-dimensional model is created by:inputting data representing the leading end, conical-shaped tip portion to a computer; andusing the data to represent the leading end, conical-shaped tip portion as the three-dimensional model, the method for manufacturing comprising the steps of:converting the computer-readable, three-dimensional model of the leading end, conical-shaped tip portion of the cutter bit into a plurality of slices that each define a cross-sectional layer of the leading end, conical-shaped tip portion of the cutter bit; andsuccessively forming each layer of the leading end, conical-shaped tip portion of the cutter bit by additive manufacturing.

2. A method for manufacturing a leading end, conical-shaped tip portion of a cutter bit and a rearward, frustoconical-shaped tip portion of the cutter bit extending axially rearwardly from the leading end, conical-shaped tip portion of the cutter bit using a computer-readable, three-dimensional model, wherein the computer-readable three-dimensional model is suitable for use in manufacturing a leading end, conical-shaped tip portion of a cutter bit for a work2025271203   24 Nov 2025-20-tool and a rearward, frustoconical-shaped tip portion of the cutter bit extending axially rearwardly from the leading end, conical-shaped tip portion of the cutter bit, wherein the leading end, conical-shaped tip portion and the rearward, frustoconical-shaped tip portion include a plurality of circumferentially-spaced ribs projecting radially outwardly from an outer peripheral surface of the leading end, conical-shaped tip portion and the rearward, frustoconical-shaped tip portion, each rib extending rearwardly from a front end apex of the leading end, conical-shaped tip portion and along the length of the rearward, frustoconical-shaped tip portion and including opposite side surfaces spaced from each other and projecting radially outwardly from the outer peripheral surface at an angle greater than zero degrees and less than 180 degrees relative to the outer peripheral surface, and the computer-readable, three-dimensional model is created by:inputting data representing the leading end, conical-shaped tip portion and the rearward, frustoconical-shaped tip portion to a computer; and using the data to represent the leading end, conical-shaped tip portion and the rearward, frustoconical-shaped tip portion as the threedimensional model, the method for manufacturing comprising:converting the computer-readable, three-dimensional model of the leading end, conical-shaped tip portion and the rearward, frustoconical-shaped tip portion of the cutter bit into a plurality of slices that each define a cross-sectional layer of one of the leading end, conical-shaped tip portion or the rearward, frustoconical-shaped tip portion of the cutter bit; andsuccessively forming each layer of the leading end, conical-shaped tip portion and the rearward, frustoconical-shaped tip portion of the cutter bit by additive manufacturing.

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