A new type of ball head tool

Abstract

The present invention provides a new type of ball-end tool, comprising: a tool head and a tool handle; the tool head includes a ball head and a neck from top to bottom; the neck is constructed as a rotary file structure, and the ball head and the neck are smoothly docked to form a head area that integrates cutting and trimming, and the head area has a cutting taper relative to the axial direction of the tool. The new type of ball-end tool is suitable for the field of stone carving and processing. A rotary file structure is provided at the bottom point away from the top of the ball head, and the ball head and the neck are smoothly docked with each other, so that the formed head area has a cutting taper that is convenient for operation, which greatly meets the needs of carving and deep processing of stone. The head area combines the functions of cutting and trimming, can perform deep cavity processing on stone, avoids interference of stone and other workpieces with tool processing, greatly improves processing efficiency, and also improves the rigidity of the tool, reduces tool wear, and thus increases the service life of the tool.

Description

Technical Field

[0001] The present invention relates to the technical field of tool processing, in particular to a novel ball-end tool. Background Art

[0002] With the continuous development of my country's economy and the improvement of people's living standards, natural stone, due to its excellent properties, has been widely used in various industries, such as outdoor architectural decoration, bedroom flooring, bridge construction, road construction, and the production of various sculptures. The growing demand for stone products has led to a steady increase in stone processing technology and production scale, promoting the development of stone processing technology. Stone processing is inseparable from carbide milling cutters. The quality of the milling cutter directly affects the processing efficiency, tool life, and processing costs.

[0003] In the process of processing stone, ordinary carbide milling cutters have inappropriate structural forms and geometric parameters, which makes it difficult for the chips generated when processing the inside of a certain depth of stone to be discharged and easily adhere to the surface of the tool, which not only affects the surface quality of the stone, but also makes the tool extremely easy to wear, shortening its service life, causing material waste and increasing processing costs.

[0004] It should be noted that the information disclosed in this background technology section is only intended to increase understanding of the overall background of the invention and should not be regarded as an admission or any form of implication that the information constitutes prior art already known to a person skilled in the art. Summary of the Invention

[0005] In view of this, an object of the present invention is to provide a new ball-end tool to solve the above problems.

[0006] The present invention adopts the following scheme:

[0007] The present application provides a new type of ball-end tool, comprising: a tool head and a tool handle; wherein, the tool head comprises a ball head and a neck from top to bottom; the neck is constructed as a rotary file structure, and the ball head and the neck are smoothly docked to form a head area that integrates cutting and trimming, and the head area has a cutting taper relative to the axial direction of the tool.

[0008] As a further improvement, the ball head has four cutting edges distributed on the same circumference, each cutting edge extends in a spiral arrangement along the apex of the ball head until it is connected to the neck, there is a tooth gap between adjacent cutting edges, and the size of each tooth gap is consistent.

[0009] As a further improvement, the rotary file structure includes a plurality of spiral file grooves, and the file grooves are bidirectional threads, and the spacing distance between adjacent threads is equal.

[0010] As a further improvement, the number of the file grooves is greater than the number of the cutting edges; and each cutting edge can be connected with one of the file grooves to form a plurality of regularly arranged chip grooves in the head area.

[0011] As a further improvement, one end of the file pattern constituting part of the chip removal groove is engaged with the corresponding cutting edge at the bottom point of the ball head, and the other end thereof extends to be arranged on the tool handle.

[0012] As a further improvement, the neck is connected to the shank by means of rounded corners, and the file marks on the neck extend at least to the end face of the shank, and a plurality of non-overlapping chip-breaking openings are recessed in the shank.

[0013] As a further improvement, along the axial direction of the tool, the cutter head and the tool handle are coaxially arranged, and the cutting taper is 3-8°.

[0014] As a further improvement, the ratio of the ball head to the neck along the length direction is 1:12.

[0015] As a further improvement, the rotary file is in the shape of a cone with a truncated head, the ball head is arranged at the truncated head position, and at the joint, the outer peripheries of the ball head and the neck are tangent along the same inclined plane.

[0016] As a further improvement, the knife handle is a columnar body; the ball head, neck and knife handle are integrally formed.

[0017] Further features of the present invention will become apparent from the following description of exemplary embodiments (with reference to the accompanying drawings). BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 2. It is a schematic structural diagram of a new ball-end tool according to an embodiment of the present invention;

[0020] Figure 2 yes Figure 1 A schematic structural diagram from another perspective, wherein the dotted box represents the neck of the cutter head;

[0021] Figure 3 It is a structural schematic diagram of the ball head portion of a new ball head tool according to an embodiment of the present invention.

[0022] Icon: 1-cutting head; 2-shank; 3-ball head; 4-neck; 5-cutting edge; 6-tooth gap; 7-file mark; 8-chip breaker; α-cutting taper. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention for which protection is sought, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0025] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0026] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0027] Example

[0028] Combine Figures 1 to 3 This embodiment provides a new ball-end tool, comprising a tool head 1 and a tool shank 2. The tool head 1 comprises, from top to bottom, a ball head 3 and a neck 4. The neck 4 is constructed as a rotary file, with the ball head 3 and neck 4 smoothly mating to form a head region that integrates cutting and trimming. This head region has a cutting taper α relative to the tool axis.

[0029] In the above-described embodiment, the novel ball-end tool differs from conventional engraving milling cutters and is suitable for stone engraving. A rotary file structure is provided at the bottom point, away from the apex of the ball head 3, and the ball head 3 and neck 4 are smoothly aligned with each other, resulting in a head region with a cutting taper α that is advantageous for operation, greatly satisfying the requirements for engraving and deep processing of stone. Furthermore, the head region combines cutting and trimming functions, enabling deep cavity processing of stone, avoiding interference from workpieces such as stone with the tool, significantly improving processing efficiency. It also increases tool rigidity, reduces tool wear, and thus increases tool life.

[0030] It should be noted that the ball head 3 is a ball-end milling cutter structure that facilitates processing, and the ball head 3 and rotary file structure are usually made of carbide. They can be used to finish various mold cavities, clean flash, burrs and welds, and chamfer, round, groove and keyway processing of various parts. This combination is particularly effective in stone carving.

[0031] In one embodiment, the ball head 3 has four cutting edges 5 distributed on the same circumference, and each cutting edge 5 extends in a spiral arrangement along the apex of the ball head 3 to connect with the neck 4. There is a tooth gap 6 between adjacent cutting edges 5, and the size of each tooth gap 6 is consistent. Among them, the four blade structures in the shape of a cross spiral can reduce the vibration of the tool during the initial cutting process and improve the quality of the machined surface. In addition, the tooth gap 6 gradually becomes larger from the apex to the bottom point of the ball head 3 and is semi-open (closed at the apex and open at the bottom point), which is conducive to the discharge of chips, and the chip space is regular and large enough, and the chip removal efficiency is high. In addition, the milling cutter structure with a four-blade ball head makes the contact area between the head area and the processed stone larger, the sharpness is enhanced, the strength of the ball head is high, and it has good milling performance.

[0032] In one embodiment, the rotary file structure includes multiple spiral grooves 7, each of which is a bidirectional thread with equal spacing between adjacent threads. Consequently, the bidirectional threads on the surface of the grooves 7 can reduce the contact area during friction, lowering the force applied to the tool during cutting, resulting in minimal vibration and easier control during machining. More specifically, the number of grooves 7 is greater than the number of cutting edges 5. Furthermore, each cutting edge 5 can interface with one of the grooves 7, forming a plurality of regularly spaced chip flutes within the head region. Furthermore, chips and waste fluids generated during milling can be discharged through the interfacing cutting edges 5 and grooves 7, significantly reducing the impact of chips on the machining process and improving machining efficiency to a certain extent.

[0033] It should be noted that each chip discharge groove is composed of a double thread structure composed of a tooth gap 6 at the cutting edge 5 and a connected file pattern 7. In the head area, each discharge groove is arranged in a spiral extension manner and is equidistant from each other. Following the tool in the cutting direction, the chips flow out to the outside along their extension direction, resulting in better chip discharge performance.

[0034] In one embodiment, the file grooves 7, which form part of the chip removal grooves, have one end engaging the corresponding cutting edge 5 at the bottom point of the ball head 3, and the other end extending onto the tool shank 2. Thus, this configuration, with the corresponding file grooves 7 serving as a bridge between the ball head 3 and the tool shank 2 (located outside the head area), guides the flow of chips and facilitates their timely discharge to the outside during machining.

[0035] In another embodiment, the neck 4 connects to the shank 2 via rounded corners, and the file grooves 7 of the neck 4 extend at least to the end surface of the shank 2. Multiple non-overlapping chip-breaking openings 8 are recessed into the shank 2. Specifically, these chip-breaking openings 8 are located on the end surface of the shank 2 near the head area. Their function is to cut chips and prevent them from tangling. This controls the direction of chip flow, maintains surface precision, reduces cutting resistance, and extends tool life.

[0036] In a preferred embodiment, the cutter head 1 and shank 2 are coaxially arranged along the tool axis, with a cutting taper α ranging from 3 to 8°. This coaxial arrangement ensures a regular distribution of the cutting edges 5 and file marks 7, achieving a machining method that strictly limits rotational cutting. Furthermore, the cutting taper α ranges from 3° to 8°, preventing the head region from being too sharp relative to the entire tool, which could affect cutting efficiency and quality. This taper configuration also helps suppress tool chatter during machining.

[0037] It's worth noting that the lengthwise ratio of the ball head 3 to the neck 4 is 1:12. Within the head area, the ball head 3 and neck 4 are proportionately positioned to adapt to drilling, milling, engraving, and deep processing operations specific to the stone being processed. Furthermore, the ball head 3 is significantly smaller than the neck 4, maintaining a size greater than ten times that of the neck 4. This ensures a seamless and complementary integration of the entire head area during processing, preventing stress concentration. The long neck 4 also provides a smooth transition. This also significantly enhances the tool's structural strength, preventing breakage and damage in the head area.

[0038] In one embodiment, the rotary file has a truncated conical shape, with the ball head 3 positioned at the truncated position. At the joint, the outer peripheries of the ball head 3 and neck 4 intersect along a common bevel. This creates a tighter and smoother connection between the ball head 3 and neck 4, facilitating integrated manufacturing. Furthermore, the entire head region maintains a certain cutting taper α at this tangent bevel, facilitating efficient machining and drilling.

[0039] More importantly, the handle 2 is cylindrical. The ball head 3, neck 4, and handle 2 are integrally formed. The head area and handle 2 are entirely made of cemented carbide, providing a better effective machining area and extending tool life.

[0040] The above are only preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention.

Claims

1. A new type of ball end tool, characterized in that: include: A knife head and a knife handle; wherein, The cutter head comprises a ball head and a neck from top to bottom; the neck is constructed as a rotary file structure, and the ball head and the neck are smoothly connected to form a head area for cutting and trimming, and the head area has a cutting taper relative to the axial direction of the tool; The ball head has four cutting edges distributed on the same circumference, each cutting edge extending in a spiral arrangement along the apex of the ball head until it is connected to the neck, with tooth gaps between adjacent cutting edges, and the sizes of the tooth gaps are consistent. The tooth gaps gradually widen from the apex to the bottom point of the ball head and are semi-open; The rotary file structure comprises a plurality of spiral file grooves, and the file grooves are bidirectional threads, and the intervals between adjacent threads are equal; The number of the file grooves is greater than the number of the cutting edges; and each cutting edge can be connected to one of the file grooves to form a plurality of regularly arranged chip grooves in the head area; The neck is connected to the shank by chamfering, and the file grooves of the neck extend at least to the end face of the shank, and a plurality of non-overlapping chip breaking openings are recessed in the shank, and the chip breaking openings are arranged on the end face of the shank near the head area.

2. The new ball-end tool according to claim 1 is characterized in that: One end of the file pattern constituting a part of the chip removal groove is engaged with the corresponding cutting edge at the bottom point of the ball head, and the other end thereof extends and is arranged on the tool handle.

3. The new ball-end tool according to claim 1 is characterized in that: Along the axial direction of the tool, the tool head and the tool handle are coaxially arranged, and the cutting taper is 3-8 degrees.

4. The new ball-end tool according to claim 3, characterized in that: The ratio of the ball head to the neck along the length direction is 1:

12.

5. The new ball-end tool according to claim 1 is characterized in that: The rotary file is in the shape of a cone with a truncated head. The ball head is arranged at the truncated head position, and at the joint, the outer peripheries of the ball head and the neck are tangent along the same inclined plane.

6. The new ball-end tool according to claim 1, characterized in that: The knife handle is a columnar body; the ball head, neck and knife handle are integrally formed.

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