Chip breaking drill bit for machining wheels

Abstract

A chip breaking drill bit for machining wheels comprises a cutter handle and an anti-skid boss connected with the cutter handle, a chip discharging groove, a large-diameter alloy soldering lug and a small-diameter alloy soldering lug are arranged on the anti-skid boss, a small-diameter chip dividing groove is formed in the small-diameter alloy soldering lug, and a front cutter face chip breaking texture chip breaking nail is arranged on the large-diameter alloy soldering lug. By reasonably designing the positions of the chip breaking nails on the front cutter face and optimizing the structure and the arrangement space of the chip breaking nails, the resistance of aluminum chips sliding on the front cutter face is greatly improved, the purposes of smoothly breaking and removing the aluminum chips are achieved based on an existing cooling mode, scratches of strip-shaped aluminum chips to a machined hole wall and sticking of the strip-shaped aluminum chips to a cutter are reduced, the machining quality of the hole wall is improved, and the service life of the cutter is prolonged. And in addition, the cutter is easy to manufacture, convenient to replace and low in cost.

Description

Technical Field

[0001] The utility model relates to the technical field of wheel processing, and specifically relates to a chip-breaking drill bit for processing wheels. Background Art

[0002] As an important part of an automobile, the wheel is not only a safety component but also an appearance component. During the processing of its bolt holes, continuous aluminum chips often occur. The non-chip-breaking causes frequent chip jams in the chip removal during processing. Under the action of cutting heat, the aluminum chips often stick to the tool and even adhere to the machined surface, resulting in unqualified machined surfaces and increasing the subsequent grinding workload. In mass production, more manpower and material resources are required for the subsequent grinding work, and a separate grinding station needs to be added, resulting in low processing efficiency and high labor intensity. Therefore, under the existing processing conditions (such as the current external pouring cooling method), it is imperative to develop a chip-breaking drill bit. Summary of the Utility Model

[0003] In view of this, the utility model aims to provide a chip-breaking drill bit for processing wheels, which can improve the machining quality of the hole wall, reduce the grinding workload, and has the advantages of simple tool making, convenient replacement, and low cost.

[0004] To achieve the above object, the technical solution of the utility model is realized as follows:

[0005] A chip-breaking drill bit for processing wheels includes a tool shank, an anti-slip boss connected to the tool shank. Chip removal grooves, large-diameter carbide inserts, and small-diameter carbide inserts are arranged on the anti-slip boss. Small-diameter chip splitting grooves are provided on the small-diameter carbide inserts, and a rake face chip-breaking texture is arranged on the large-diameter carbide inserts.

[0006] In some embodiments, the rake face chip-breaking texture includes chip-breaking nails.

[0007] In some embodiments, the included angle between the chip-breaking nail and the rake face is α, and α is set to 30° - 45°. The front included angle of the chip-breaking nail is β, and β is set to 30° - 60°. The distance between the chip-breaking nail and the cutting edge is a, and a is set to 1 - 3 mm. The distance between the chip-breaking nail and the rake face is b, and b is set to 3 - 5 mm.

[0008] In some embodiments, the height h of the chip-breaking nail from the rake face is set to 1 - 2 mm; the width w of the chip-breaking nail is set to 3 - 5 mm; the length l of the chip-breaking nail is set to 2 - 5 mm.

[0009] In some embodiments, the axis of the chip-breaking nail is perpendicular to the corresponding main cutting edge.

[0010] In some embodiments, the chip removal grooves are polished.

[0011] In some embodiments, there are 2 - 3 chip-breaking nails, and a distance gap is provided between the chip-breaking nail paper parts.

[0012] Compared with the prior art, the chip-breaking drill bit for machining wheels of the present utility model has the following advantages:

[0013] By reasonably designing the position of the chip-breaking nails on the rake face and optimizing the structure and arrangement space of the chip-breaking nails, the present utility model greatly increases the resistance of the aluminum chips sliding on the rake face, realizes the smooth breaking and discharging of the aluminum chips based on the existing cooling method, reduces the scratching and sticking of the banded aluminum chips on the machined hole wall, improves the machining quality of the hole wall, reduces the grinding workload, and moreover, the tool is simple to manufacture, convenient to replace, and has low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings constituting a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0015] Figure 1 is the front view of a chip-breaking drill bit for machining wheels of the present utility model.

[0016] Figure 2 is the schematic structural diagram of the chip-breaking nails of a chip-breaking drill bit for machining wheels of the present utility model.

[0017] DESCRIPTION OF THE REFERENCE NUMERALS

[0018] 1 - tool shank, 2 - anti-slip boss, 3 - chip evacuation groove, 4 - large-diameter alloy welding piece, 5 - small-diameter alloy welding piece, 6 - small-diameter chip-splitting groove, 7 - chip-breaking texture on the rake face. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0020] Next, with reference to the drawings and in combination with the embodiments, the technical solutions of the present utility model will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0021] Next, refer to Figures 1 to 2 and in combination with the embodiments, describe the chip-breaking drill bit for machining wheels of the embodiments of the present utility model.

[0022] The object of the present invention is to provide a chip-breaking drill for machining wheels. Under the existing cooling method, comprehensively considering the curling tendency of aluminum chips generated under different stepped drill cutting edges, a chip-breaking texture is added to the corresponding rake face to reduce the curling radius of the ribbon-shaped aluminum chips. At the same time, considering the flow of the externally poured cutting fluid, the chip-breaking texture is distributed and arranged. The chip-breaking texture on the rake face not only plays a role in increasing the curling friction force of the aluminum chips, but also discharges the chips smoothly along with the curling tendency. Therefore, the present invention also reasonably designs the smooth transition between the chip-breaking texture and the rake face to achieve the purpose of breaking and smoothly discharging the aluminum chips.

[0023] To achieve the above object, the technical solution of the present invention is: a chip-breaking stepped drill for machining wheel bolt holes, including a tool shank 1, an anti-slip boss 2, a chip flute 3, a large-diameter alloy welding piece 4, a small-diameter alloy welding piece 5, a small-diameter chip-splitting groove 6, a rake-face chip-breaking texture 7. The rake-face chip-breaking texture 7 is composed of chip-breaking nails with different numbers. a is the distance between the chip-breaking texture and the cutting edge band, b is the spacing of the rake-face chip-breaking texture, α is the angle between the chip-breaking texture and the rake face, β is the front-end angle of a single chip-breaking nail, h is the height of a single chip-breaking nail from the rake face, w is the width of the chip-breaking nail, and l is the length of a single chip-breaking nail. The tool shank, the anti-slip boss, and the chip flute are integrally connected. The large-diameter alloy welding piece and the small-diameter alloy welding piece are respectively welded on the tool body. The small-diameter chip-splitting groove is grooved on the small-diameter welding piece. The chip-breaking texture is welded on the rake face according to relevant parameters. When welding, it is ensured that the axis of the chip-breaking nail is perpendicular to the corresponding cutting edge band, and a distance is reserved between the chip-breaking nails to ensure that during machining, the cutting fluid flows into the cutting edge position from the spacing for cooling and lubrication. This chip-breaking texture can greatly increase the resistance to curling of the aluminum chips, reduce the curling radius of the aluminum chips, and achieve chip breaking. The climbing angle α set at the front end of the chip-breaking nail can smoothly discharge along the climbing angle after chip breaking. The chip flute is polished to reduce the discharge resistance after the aluminum chips are broken.

[0024] During the working process, the wheel is clamped on the machining center through a fixture, and the chip-breaking drill is installed on the machine tool through a drill chuck, and the drilling process is carried out according to the pre-numbered machining program.

[0025] The present invention greatly improves the resistance of the aluminum chips to slide on the rake face by reasonably designing the position of the chip-breaking nails on the rake face and optimizing the structure and arrangement space of the chip-breaking nails. Based on the existing cooling method, the purpose of smoothly breaking and discharging the aluminum chips is achieved, reducing the scratching and sticking of the ribbon-shaped aluminum chips to the machined hole wall, improving the machining quality of the hole wall, reducing the grinding workload, and the tool is simple to manufacture, convenient to replace, and low in cost.

[0026] Compared with the prior art, the chip-breaking drill for machining wheels of the present utility model has the following advantages:

[0027] The object of the present invention is to comprehensively consider the curling tendency of aluminum chips generated under different step drill edges in the existing cooling method, add chip-breaking textures to the corresponding rake face to reduce the curling radius of the strip-shaped aluminum chips, and at the same time consider the flow of the externally poured cutting fluid to arrange the chip-breaking textures. The chip-breaking textures on the rake face should not only increase the curling friction of the aluminum chips, but also discharge the chips smoothly along with the curling tendency. Therefore, the present invention also reasonably designs the smooth transition between the chip-breaking textures and the rake face to achieve the purpose of breaking and smoothly discharging the aluminum chips.

[0028] By reasonably designing the position of the chip-breaking nails on the rake face and optimizing the structure and arrangement space of the chip-breaking nails, the resistance of the aluminum chips sliding across the rake face is greatly increased, and based on the existing cooling method, the purpose of smoothly breaking and discharging the aluminum chips is achieved, reducing the scratching and sticking of the strip-shaped aluminum chips on the machined hole wall, improving the machining quality of the hole wall, reducing the grinding workload, and moreover, the tool is simple to manufacture, convenient to replace, and low in cost.

[0029] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model 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 thus cannot be understood as a limitation to the protection scope of the present utility model.

[0030] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0031] In the present utility model, unless otherwise clearly specified and defined, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or communication with each other; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0032] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A chip-breaking drill for machining wheels, characterized in that, It includes a tool shank, an anti-slip boss connected to the tool shank, a chip evacuation groove, a large-diameter carbide insert, and a small-diameter carbide insert are provided on the anti-slip boss, a small-diameter chip-splitting groove is opened on the small-diameter carbide insert, and a chip-breaking texture is provided on the large-diameter carbide insert.

2. The chip-breaking drill bit for machining a wheel according to claim 1, wherein The chip-breaking texture on the rake face includes chip-breaking studs.

3. The chip-breaking drill bit for machining wheels according to claim 2, characterized in that, The included angle between the chip-breaking stud and the rake face is α, α is set to 30° - 45°, the front included angle of the chip-breaking stud is β, β is set to 30° - 60°, the distance between the chip-breaking stud and the cutting edge is a, a is set to 1 - 3 mm, and the distance between the chip-breaking stud and the rake face is b, b is set to 3 - 5 mm.

4. The chip-breaking drill bit for machining wheels according to claim 2, characterized in that, The height h of the chip-breaking stud from the rake face is set to 1 - 2 mm; the width w of the chip-breaking stud is set to 3 - 5 mm; the length l of the chip-breaking stud is set to 2 - 5 mm.

5. The chip-breaking drill bit for machining wheels according to claim 2, wherein, The axis of the chip-breaking stud is perpendicular to the corresponding main cutting edge.

6. The chip-breaking drill bit for machining wheels according to claim 1, characterized in that, The chip evacuation groove is polished.

7. The chip-breaking drill bit for machining wheels according to any one of claims 2-6, characterized in that, There are 2 - 3 chip-breaking studs, and a distance gap is set between the chip-breaking stud paper parts.

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