A bottom cleaner

Abstract

The utility model discloses a kind of clear bottom knives, including handle, tool bit and at least one group of cutting edges, the cutting edge includes bottom blade and peripheral side blade mouth, the circumferential direction of tool bit is equipped with several axial chip removal grooves, and each axial chip removal groove is respectively corresponding with a group of cutting edges;Peripheral side blade mouth is connected with the axial chip removal groove smoothly through rake face on the front side of rotation direction;Peripheral side blade mouth is provided with relief surface on the back side of rotation direction, and it is tangent transition connection with the relief surface by polishing arc, and the polishing arc is pressed in cutting process The surface of finished product is flattened.The peripheral side blade mouth is tangent transition with relief surface by polishing arc in the utility model, and the surface of finished product is flattened by pressing action in cutting process, and the quality of processing surface is improved.

Description

Technical Field

[0001] This utility model relates to the field of machining tool technology, specifically to a bottom cleaning tool. Background Technology

[0002] Bottom-clearing tools are commonly used in machining for finishing bottom surfaces, and their cutting performance directly affects the quality and efficiency of the machined surface. Existing bottom-clearing tools often suffer from the following problems during the cutting process:

[0003] First, the existing peripheral cutting edges cannot provide heat treatment to the machined surface, resulting in poor workpiece surface finish. Additionally, the peripheral cutting edges of traditional bottom-clearing tools have a sharp transition between the rake and flank faces, making them prone to chipping or wear during high-speed cutting, thus affecting tool life.

[0004] Secondly, existing bottom-clearing cutting tools typically have continuous linear contact between the bottom edge and the workpiece bottom surface. This results in continuous cutting resistance acting on the bottom edge, which not only easily generates vibration and noise due to high overload, but also causes the bottom edge to break due to a sudden increase in resistance when machining high-hardness materials or under high-feed conditions. Moreover, the chips generated by the bottom edge tend to accumulate at the bottom of the tool head, which not only entangles with subsequent chips and causes blockages, but also causes scratches, burrs, and other defects on the machined surface due to secondary friction between the chips and the workpiece bottom surface, affecting the flatness of the flat-bottomed hole. At the same time, poor chip removal at the bottom of the tool head can also lead to heat accumulation, causing the bottom edge to lose hardness due to high-temperature annealing, and even causing thermal deformation of the workpiece bottom surface, affecting dimensional stability.

[0005] To solve the above problems, there is an urgent need for a bottom-clearing cutting edge to ensure smooth chip removal, high machining accuracy, low cutting resistance, low noise, and long tool life. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides a bottom cleaning knife.

[0007] The technical solution of this utility model includes a tool holder, a tool head, and at least one set of cutting edges. The cutting edges include a bottom cutting edge and a peripheral cutting edge. The tool head is provided with a plurality of axial chip removal grooves in the circumferential direction, and each axial chip removal groove corresponds to a set of cutting edges.

[0008] The front side of the peripheral cutting edge along the rotation direction is connected to the axial chip removal groove through the rake face; the rear side of the peripheral cutting edge along the rotation direction is provided with a flank face, which is tangentially connected to the flank face through a finishing arc, and the finishing arc presses the machined surface during the cutting process.

[0009] A further technical solution is that the bottom cutting edge is provided with several end tooth chip removal grooves in the radial direction.

[0010] A further technical solution is that the chip removal grooves on all the bottom cutting edges are staggered in the circumferential direction of the cutting head.

[0011] A further technical solution is as follows: two composite grooves are symmetrically opened on the cutting head. The composite groove includes a mounting platform and an arc-shaped groove. The two sets of cutting edges are respectively mounted on the corresponding mounting platforms. The axial chip removal groove is formed by the arc-shaped groove and the installed cutting edge together.

[0012] A further technical solution is as follows: the two sets of cutting edges include a first cutting edge and a second cutting edge; the bottom surface of the cutter head is provided with two structural inclined surfaces symmetrically distributed about the center of the cutter body: a first inclined surface and a second inclined surface; the bottom of the first inclined surface is transitionally connected to the rear of the first bottom edge of the first cutting edge and is inclined toward the axial chip removal groove corresponding to the second cutting edge; the bottom of the second inclined surface is transitionally connected to the rear of the second bottom edge of the second cutting edge and is inclined toward the axial chip removal groove corresponding to the first cutting edge.

[0013] A further technical solution is that the handle and the blade are integrally formed.

[0014] A further technical solution is that the two sets of cutting edges are respectively fixed to their corresponding mounting platforms by brazing.

[0015] The beneficial technical effects of this utility model are:

[0016] (1) The peripheral cutting edge is tangentially transitioned to the back face through the polished arc. During the cutting process, the machined surface is flattened by the ironing action, which improves the quality of the machined surface. At the same time, the polished arc disperses the impact load of the cutting force on the peripheral cutting edge through the curvature transition. Especially when machining hard and brittle materials, it can reduce the risk of peripheral cutting edge breakage and extend the overall service life of the tool.

[0017] (2) Several bottom cutting edges are provided with radially distributed end tooth chip removal grooves, and each end tooth chip removal groove is circumferentially staggered to avoid the formation of continuous protrusion residues, while reducing cutting resistance and noise; at the same time, it enhances the chip removal capacity of the bottom cutting edge area and improves heat dissipation efficiency; while ensuring the machining flatness, it improves the tool life. Attached Figure Description

[0018] Figure 1 This is a frontal schematic diagram of the cutting edge mounting position of this utility model;

[0019] Figure 2 This is a side view of the cutting edge mounting position of this utility model;

[0020] Figure 3 This is a schematic diagram of the specific structure of the cutting edge of this utility model;

[0021] Figure 4This is a top view of the overall structure of this utility model;

[0022] Figure 5 This is a bottom view of the overall structure of this utility model;

[0023] Wherein: 100, tool holder; 200, tool head; 201, mounting platform; 202, axial chip removal groove; 300, cutting edge; 301, bottom cutting edge; 302, circumferential cutting edge; 303, finishing arc; 400, end tooth chip removal groove;

[0024] 1. First cutting edge; 11. First bottom cutting edge; 12. First side cutting edge; 2. Second cutting edge; 21. Second bottom cutting edge; 22. Second side cutting edge; 3. First inclined surface; 4. Second inclined surface. Detailed Implementation

[0025] In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0026] like Figure 1 and Figure 2 As shown, the present invention provides a bottom-cleaning tool, comprising a tool holder 100, a tool head 200, and a plurality of cutting edges 300. The tool holder 100 is used to clamp onto a machine tool or power tool to provide a stable mounting base. The tool head 200 is integrally formed with the tool holder 100 and is used to bear the cutting force of the cutting edges 300. The plurality of cutting edges 300 are evenly distributed circumferentially on the tool head 200 and are used to cut the material.

[0027] In this embodiment, the cutter head 200 has two symmetrical composite grooves. The composite grooves include a mounting platform 201 and an arc-shaped groove. The mounting platform 201 provides a precise, stable, and flat mounting base for the cutting edge 300. The cutting edge 300 is fixed to the mounting platform 201 by brazing. The arc-shaped groove is located in front of the mounting platform 201 along the rotation direction. The arc-shaped groove is transitionally connected to the mounting platform 201 and together with the installed cutting edge 300, it forms an axial chip removal groove 202 with sufficient space and smooth passage.

[0028] like Figure 3 Each of the cutting edges 300 includes a bottom edge 301 and a peripheral edge 302. The bottom edge 301 is located at the bottom and extends radially, cutting the bottom surface of the workpiece during axial feed. The peripheral edge 302 extends axially, cutting the sidewall of the hole during axial feed, and together with the bottom edge 301, it processes a flat-bottomed hole.

[0029] Furthermore, both sets of bottom cutting edges 301 are provided with a plurality of end tooth chip removal grooves 400 in the radial direction. The end tooth chip removal grooves 400 transform the continuous cutting path of the bottom cutting edge 301 into a segmented structure, reducing the cutting load and improving the durability of the bottom cutting edge 301.

[0030] When there is no end tooth chip removal groove 400, the bottom cutting edge 301 is in continuous linear contact with the bottom surface of the workpiece. The cutting area is concentrated and the cutting amount is constant, which causes the cutting resistance to act continuously on the bottom cutting edge 301. Not only is it easy to generate vibration and noise due to large overload, but also the bottom cutting edge 301 will break due to the sudden increase in resistance when machining high hardness materials or high feed conditions.

[0031] In this embodiment, the end tooth chip removal groove 400 divides the bottom cutting edge 301 into several independent cutting segments, transforming the originally continuous cutting contact into intermittent segmented contact: each cutting segment only undertakes the cutting task of a local area, significantly reducing the cutting amount per unit time, thereby dispersing the cutting resistance, reducing the continuous load borne by the bottom cutting edge 301, effectively suppressing vibration and noise, and avoiding the breakage of the bottom cutting edge 301 due to local stress concentration, thus significantly improving the tool life.

[0032] Moreover, in continuous cutting, the long chips generated by the bottom edge 301 without the end tooth chip groove 400 tend to accumulate at the bottom of the cutter head 200. This not only causes blockage by entanglement with subsequent chips, but also causes scratches, burrs and other defects on the machined surface due to secondary friction between the chips and the bottom surface of the workpiece, affecting the flatness of the flat bottom hole.

[0033] In this embodiment, the spaced design of the end tooth chip removal groove 400 provides an immediate discharge channel for chips: under the action of rotational centrifugal force, the chips generated by each cutting segment can be directly and quickly removed from the cutting area through the adjacent axial chip removal groove 202, avoiding accumulation between the bottom cutting edge 301 and the bottom surface of the workpiece, ensuring that the bottom cutting edge 301 is always cutting in a chip-free state, and ensuring the machining accuracy of the bottom surface of the workpiece.

[0034] Furthermore, the heat generated by continuous cutting of the bottom edge 301 without the end tooth chip removal groove 400 will be continuously conducted to the tool head 200, and the long contact between the long chip and the bottom edge 301 will lead to heat accumulation. This may not only cause the bottom edge 301 to lose hardness due to high temperature annealing, but also cause thermal deformation of the bottom surface of the workpiece due to heat conduction, affecting dimensional stability.

[0035] In this embodiment, the end tooth chip removal groove 400 optimizes heat dissipation through a dual path: on the one hand, the gaps in the chip removal groove form an airflow channel, which can directly remove some of the heat from the cutting area; on the other hand, the chips generated by segmented cutting are quickly detached from the bottom cutting edge 301 under the guidance of the end tooth chip removal groove 400, which greatly shortens the contact time between the chips and the bottom cutting edge 301, reduces the conduction of heat to the cutting head 200, enhances heat dissipation efficiency, and avoids thermal damage.

[0036] Furthermore, the chip removal grooves 400 on the two sets of bottom cutting edges 301 are designed in an alternating pattern, so that all the chip removal grooves 400 are staggered in the circumferential direction of the cutting head 200. When the cutting head 200 rotates and cuts, the chip removal grooves 400 of the previous bottom cutting edge 301 leave continuous protrusions on the rotation path; however, as the cutting head 200 continues to rotate, the cutting end teeth of the next bottom cutting edge 301 will pass through this position immediately, cutting away the remaining continuous protrusions and completing the flat bottom surface cutting process.

[0037] Furthermore, the peripheral cutting edge 302 has a rake face on its front side along the rotation direction and a flank face on its rear side along the rotation direction. The peripheral cutting edge 302 is smoothly connected to the corresponding axial chip removal groove 202 through the rake face; the peripheral cutting edge 302 is tangentially connected to the flank face through a finishing arc 303. The finishing arc 303 applies heat to the machined surface during cutting, improving the surface finish of the workpiece; at the same time, the finishing arc 303 disperses the impact load of the cutting force on the peripheral cutting edge 302 through curvature transition, which can reduce the risk of chipping of the peripheral cutting edge 302, especially when machining hard and brittle materials, and extend the overall service life of the tool.

[0038] Furthermore, such as Figure 4 and Figure 5 The two sets of cutting edges 300 are a first cutting edge 1 and a second cutting edge 2, respectively. The first cutting edge 1 includes a first bottom edge 11 and a first side edge 12, and the second cutting edge 2 includes a second bottom edge 21 and a second side edge 22.

[0039] The bottom surface of the cutter head 200 has two structural inclined surfaces symmetrically distributed about the center of the cutter body: a first inclined surface 3 and a second inclined surface 4. The first inclined surface 3 is located behind the first cutting edge 1 along the rotation direction, and its bottom transitions to the rear of the first bottom cutting edge 11, forming a chip guiding plane lower than the first bottom cutting edge 11; the second inclined surface 4 is located behind the second cutting edge 2 along the rotation direction, and its bottom transitions to the rear of the second bottom cutting edge 21, forming a chip guiding plane lower than the second bottom cutting edge 21. Both the first inclined surface 3 and the second inclined surface 4 are inclined toward their corresponding axial chip removal grooves 202.

[0040] Based on the above structure, the first bottom cutting edge 11 and the second bottom cutting edge 21 form two independent chip flows when cutting simultaneously. The first inclined surface 3 is used to receive, guide, and export chips generated by the second cutting edge; the second inclined surface 4 is used to receive, guide, and export chips generated by the first cutting edge 1. This cross-flow guiding structure provides a pre-set smooth transition path for the chips, allowing them to smoothly and with low resistance enter the corresponding axial chip removal groove 202, significantly improving chip removal efficiency and reducing the additional resistance and heat caused by the chips at the bottom directly impacting the groove wall of the axial chip removal groove 202.

[0041] Furthermore, the structure formed by the first inclined surface 3 and the second inclined surface 4 recessed towards the bottom increases the additional chip space at the bottom of the axial chip removal groove 202, thus buffering the chip flow under high feed conditions, preventing a sudden increase in cutting force, protecting the cutting edge from impact damage, and maintaining the stability of the cutting process. At the same time, the first inclined surface 3 and the second inclined surface 4 are inclined towards the corresponding axial chip removal groove 202, and the resulting bending moment helps to promote chip curling and breakage, forming a shorter chip shape that is easier to remove, further optimizing the chip removal effect, and effectively reducing the collision, entanglement, or accumulation of the two chip flows in the limited space at the bottom of the tool head 200, thereby reducing the risk of clogging.

[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A bottom-cleaning tool, comprising a tool holder (100), a tool head (200), and at least one set of cutting edges (300), wherein the cutting edges (300) include a bottom edge (301) and a circumferential cutting edge (302), and the tool head (200) is provided with a plurality of axial chip removal grooves (202) in the circumferential direction, each axial chip removal groove (202) corresponding to a set of cutting edges (300); characterized in that: The front side of the peripheral cutting edge (302) along the rotation direction is smoothly connected to the corresponding axial chip removal groove (202) through the rake face; the rear side of the peripheral cutting edge (302) along the rotation direction is provided with a back face, which is tangentially connected to the back face through a finishing arc (303), and the finishing arc (303) presses the machined surface during the cutting process.

2. The bottom cleaning knife according to claim 1, characterized in that: The bottom cutting edge (301) is provided with a plurality of end tooth chip removal grooves (400) in the radial direction.

3. A bottom cleaning knife according to claim 2, characterized in that: All the end tooth chip removal grooves (400) on the bottom edge (301) are staggered in the circumferential direction of the cutter head (200).

4. A bottom cleaning knife according to claim 1, characterized in that: Two composite grooves are symmetrically formed on the cutter head (200). The composite groove includes a mounting platform (201) and an arc groove. The two sets of cutting edges (300) are respectively mounted on the corresponding mounting platforms (201). The axial chip removal groove (202) is formed by the arc groove and the installed cutting edge (300).

5. A bottom cleaning knife according to claim 4, characterized in that: The two sets of cutting edges (300) include a first cutting edge (1) and a second cutting edge (2); the bottom surface of the cutter head (200) is provided with two structural inclined surfaces symmetrically distributed about the center of the cutter body: a first inclined surface (3) and a second inclined surface (4); the bottom of the first inclined surface (3) is connected to the rear of the first bottom edge (11) of the first cutting edge (1) and is inclined toward the axial chip removal groove (202) corresponding to the second cutting edge (2); the bottom of the second inclined surface (4) is connected to the rear of the second bottom edge (21) of the second cutting edge (2) and is inclined toward the axial chip removal groove (202) corresponding to the first cutting edge (1).

6. A bottom cleaning knife according to claim 1, characterized in that: The handle (100) and the blade (200) are integrally formed.

7. A bottom cleaning knife according to claim 1, characterized in that: The two sets of cutting edges (300) are respectively fixed to their respective mounting platforms (201) by brazing.

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