CN217941965U - Drilling tool for Kong Zhikong spherical bottom - Google Patents

Abstract

The utility model discloses a drilling tool with spherical bottom Kong Zhikong, which relates to the technical field of drilling tools and aims to solve the problems that the prior drilling tool is poor in drilling quality, low in machining efficiency, short in service life and the like during drilling, the technical scheme includes that the drill comprises a handle portion and a cutting portion, the cutting portion comprises two cutting edges and two main chip grooves, the two cutting edges and the two main chip grooves are spirally and symmetrically distributed along the central axis of a drilling tool, and chip grooves are formed in the front ends of the main chip grooves. The device passes through the small-angle helix angle that the land set up, intensity in the time of greatly increased cutting, and drilling is efficient, has improved machining efficiency, through the setting of margin, can improve the finish of pore wall, through the design of circular arc type main cutting edge for when drilling processing finishes, the hole bottom appears circular-arcly, is used for guaranteeing the hole shape precision and the roughness in processing hole, ensures processingquality.

Description

Drilling tool for Kong Zhikong spherical bottoms

Technical Field

The utility model relates to a drilling cutter technical field especially relates to a spherical end Kong Zhikong drilling cutter.

Background

Mining machines are machines used for operations such as mineral mining and beneficiation. The working principle and structure of the prospecting machine are mostly the same as or similar to those of mining machines for mining similar minerals, and the prospecting machine also belongs to mining machines in a broad sense. With the rapid development of mining machinery, the requirements on the material performance are higher and higher. Because the mining machinery field generally adopts hard material steel to prepare, the processing difficulty is big, and the hole bottom is the ball-type, and the preparation condition is harsh.

In the process of mineral exploitation, drilling machining is needed, but the problems of poor drilling quality, low machining efficiency, short service life of a tool and the like are easily caused in the drilling machining of the existing hard alloy tool, and the production efficiency of equipment manufacturing is seriously influenced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a drilling cutter at spherical bottom Kong Zhikong to solve the problem of proposing among the above-mentioned background art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a Kong Zhikong drilling cutter at spherical bottom, includes stalk portion and cutting part, the cutting part includes two cutting edges lamella and two main chip grooves, two cutting edges lamella and main chip groove all are spiral symmetric distribution along the central axis of drilling cutter, and two cutting edges lamella form the chisel edge in cutting part front end face center department, the chip groove is seted up to main chip groove front end, two the chip groove in the main chip groove is located the chisel edge both sides respectively, the width of chisel edge is injectd by the distance between two chip grooves.

As a preferred technical scheme of the utility model, the chip groove includes main rake face, curved chip winding face and chip discharging face, main rake face meets with the back knife face and forms the main cutting edge, the main cutting edge is arc.

As an optimal technical solution of the present invention, the flank face includes a first flank face and a second flank face, a first clearance angle α is formed between the first flank face and the main rake face, and an angle of the first clearance angle α is 70 to 72 °.

As an optimal technical scheme of the utility model, be formed with the passivation face on the main cutting edge, the passivation face sets up along main cutting edge length direction.

As an optimized technical scheme of the utility model, two the back of a shovel is all seted up to the back of a blade face of sword lamella, the back of a shovel meets with main chip groove and forms the cutting edge.

As a preferred technical scheme of the utility model, the helix angle of two said cutting edge lobes is 7-10.

The utility model has the advantages that:

the device passes through the small-angle helix angle that the land set up, greatly increased the intensity when cutting for drilling efficiency improves, thereby improved machining efficiency, and through the setting of margin, can improve the finish of pore wall, and through the design of circular arc type main cutting edge, make when drilling processing finishes, the hole bottom presents circular-arcly, is used for guaranteeing the hole shape precision and the roughness in processing hole, ensures processingquality.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of the partial structure of the edge zone in front view.

Fig. 3 is a schematic structural view of the front end face of the present invention.

Reference numbers in the figures: 1. a main cutting edge; 2. a flank face; 3. a main chip groove; 4. carrying out shoveling; 5. a handle; 6. a chip pocket; 7. a blade part; 8. a margin.

Detailed Description

The technical solution of the present invention will be clearly and completely described with reference to the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The present invention will be further explained with reference to the accompanying drawings.

Referring to fig. 1, 2 and 3, the present embodiment provides a spherical bottom Kong Zhikong drilling tool, including a shank 5 and a blade 7, where the blade 7 has a taper in an axial direction of a center of the drilling tool, the taper is 0.08-0.1/100mm, the blade 7 includes two lands and two main flutes 3 for discharging scraps generated during drilling, the two lands and the main flutes 3 are both spirally and symmetrically distributed along a central axis of the drilling tool, the two lands form a chisel edge at a center of a front end surface of the blade, back surfaces of the two lands are both provided with a back relief 4, the back relief 4 and the main flutes 3 are connected to form a land 8, a helix angle of the two lands is 7-10 °, a helix angle of a small angle greatly increases strength during drilling, drilling efficiency is high, a flute is provided at a front end of the main flutes 3, flutes 6 are provided at two sides of the two main flutes 3, and a radial depth of the two flutes 6 is controlled to enable a distance between the two flutes 6 to be relatively narrow and a distance between the two flutes 6 is obtained by controlling a distance between the flute center of the drill.

Chip groove 6 includes main rake face, curved chip surface and chip surface of rolling up, main rake face meets with back knife face 2 and forms main cutting edge 1, main cutting edge 1 is arc, designs according to work piece hole bottom size, back knife face 2 includes first back knife face and second back knife face, form first relief angle alpha between first back knife face and the main rake face, the angle of first relief angle alpha is 70-72, be formed with the passivation face on the main cutting edge 1, the passivation face sets up along 1 length direction of main cutting edge, and when the drilling, the drill point on the chisel contacts with the work piece earlier, and the chisel is by 6 control width of both sides chip groove, and the chisel thinnings, can play fine centering effect in the drilling. With the continuous rotation of the drilling tool, the land 8 enters the hole to support the radial force from the main cutting edge 1 and improve the surface smoothness of the hole wall, and the bottom of the hole is arc-shaped when the drilling process is finished through the design of the arc-shaped main cutting edge 1.

The utility model discloses a theory of operation is: when the device is used, a drilling tool is firstly connected with an external tool, and the drilling tool needs to be cooled in the drilling process, so that the service life of the tool is prolonged. With the continuous rotation of the drilling tool, the land 8 enters the hole, supports the radial force from the main cutting edge 1, improves the surface finish of the hole wall, and enables the bottom of the hole to be arc-shaped when the drilling process is finished through the design of the arc-shaped main cutting edge 1.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims (6)

1. The utility model provides a spherical bottom Kong Zhikong drilling cutter, includes stalk portion (5) and cutting part (7), its characterized in that, cutting part (7) include two cutting edges lamella and two main chip grooves (3), two cutting edges lamella and main chip groove (3) all are spiral symmetric distribution along drilling cutter's the central axis, and two cutting edges lamella form the chisel edge in cutting part front end face center department, chip groove (6), two are seted up to main chip groove (3) front end chip groove (6) in main chip groove (3) are located the chisel edge both sides respectively, the width of chisel edge is injectd by the distance between two chip grooves (6).

2. The spherical bottom Kong Zhikong drilling tool of claim 1, wherein the chip flute (6) comprises a main rake face, an arc-shaped chip curling face and a chip discharging face, the main rake face meets a flank face (2) to form a main cutting edge (1), and the main cutting edge (1) is arc-shaped.

3. The spherical bottom Kong Zhikong drilling tool as in claim 2, wherein the flank face (2) comprises a first flank face and a second flank face, the first flank face and the main rake face form a first clearance angle α, the angle of the first clearance angle α is 70-72 °.

4. The drilling tool with the spherical bottom Kong Zhikong as claimed in claim 2, wherein said main cutting edge (1) is formed with a blunt surface, and said blunt surface is arranged along the length direction of the main cutting edge (1).

5. The drilling tool with spherical bottom Kong Zhikong as claimed in claim 1, wherein the land faces of both said lands are provided with a spade back (4), said spade back (4) is connected with a main chip discharge groove (3) to form a land (8).

6. The spherical bottom Kong Zhikong drilling tool of claim 5 wherein the helix angle of two of said lands is 7-10 °.

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