CN218745099U - Center avoiding type drilling and milling cutter - Google Patents

Abstract

The utility model discloses a type of dodging in center bores milling cutter, including the handle of a knife main part that has link and work end, the work end of handle of a knife main part is equipped with along axially extended annular boss, and the center of annular boss forms dodges the centre bore, and the terminal surface of annular boss is equipped with the cutting portion along the outside extension of the axial of handle of a knife main part, and the outer end of cutting portion has the main cutting edge that extends along annular boss wall thickness direction. The utility model has the advantages that: for a part with a central convex column, the counter bore of the circumferential outer edge of the part can be quickly enlarged.

Description

Center avoiding type drilling and milling cutter

Technical Field

The utility model relates to a machining cutter, concretely relates to type brill milling cutter is dodged at center.

Background

Milling machines are mainly machine tools for machining various surfaces of a workpiece with a milling cutter, usually the milling cutter is moved mainly by a rotary motion, and the movement of the workpiece and the milling cutter is a feed motion, that is: the milling process is to fix the blank, feed the blank with a high-speed rotating milling cutter to cut the desired shape and features.

In the prior art, for a part with an annular groove structure, because a boss is arranged at the center of a groove, the annular groove is usually formed by milling, but the milling cutter is required to move for a plurality of circles along the circumferential path of the annular groove, and the processing efficiency is low.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a type brill milling cutter is dodged at center to mill the technical problem of ring channel inefficiency among the solution prior art.

In order to achieve the above purpose, the utility model discloses technical scheme as follows:

the utility model provides a center dodges type and bores milling cutter which the key lies in: the circular cutting knife comprises a knife handle main body with a connecting end and a working end, wherein the working end of the knife handle main body is provided with an annular boss extending along the axial direction, the center of the annular boss forms an avoiding center hole, the end face of the annular boss is provided with a cutting part extending outwards along the axial direction of the knife handle main body, and the outer end of the cutting part is provided with a main cutting edge extending along the wall thickness direction of the annular boss.

By adopting the structure, for the annular groove or the annular sinking groove part with the central boss, when the annular groove or the annular sinking groove is processed, the central boss of the part is positioned in the avoiding central hole of the annular boss, and then the annular groove or the annular sinking groove can be formed once by rotating the cutter handle main body. The tool shank main body is applicable to drilling machines and milling machines.

Preferably, the method comprises the following steps: the cutting part is provided with a front cutter face and a main back face corresponding to two sides of the main cutting edge respectively, wherein the front cutter face is of a plane structure and has an included angle relative to the axial lead of the cutter handle main body, and the main back face is of a spiral inclined face structure. By adopting the structure, the cutting is convenient to arrange during cutting, and the processing efficiency can be improved.

Preferably, the method comprises the following steps: said angle is equal to 5 °. By adopting the structure, the tool nose is sharp, and the cutting effect is ensured.

Preferably, the method comprises the following steps: the cutting parts are arranged at the end parts of the annular bosses symmetrically. By adopting the structure, the stress is uniformly distributed during cutting, and the processing quality can be ensured.

Preferably, the method comprises the following steps: wherein the main rear face of one set of cutting portions extends helically to the lower end of the rake face of the other set of cutting portions. By adopting the structure, the strength of the cutting part is convenient to guarantee.

Preferably, the method comprises the following steps: the connecting end of the knife handle main body is of a solid structure. By adopting the structure, the installation of the cutter on the drilling machine or the milling machine can be facilitated.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the limit of equipment conditions is broken through, and the drilling machine is directly suitable for machining the part structure, so that the equipment cost is reduced.

2. For a part with a central convex column, the counter bore of the circumferential outer edge of the part can be quickly enlarged.

3. The processing efficiency is high, and the annular groove of the part can be rapidly drilled or milled.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a front view of the present invention;

FIG. 3 is a schematic structural view of a part;

fig. 4 is a reference diagram of a drill-milling cutter in use.

Detailed Description

The present invention will be further described with reference to the following examples and accompanying drawings.

As shown in fig. 1 and 2, a center avoidance type drilling and milling cutter includes a handle main body 1, a connection end 11 is arranged at the rear portion of the handle main body 1, the connection end 11 is of a solid structure and is used for being connected with a spindle of a drilling machine or a milling machine, a working end 12 is arranged at the front portion of the handle main body 1, an annular boss 1a is arranged at the working end 12, an avoidance center hole 1f is formed inside the annular boss 1a, a cutting portion 1b is formed on the front end face of the annular boss 1a, the cutting portion 1b extends outwards along the axial direction of the handle main body 1, a main cutting edge 1c extending along the wall thickness direction of the annular boss 1a is arranged at the outer end of the cutting portion 1b, a rake face 1d and a main rear face 1e are respectively arranged on two sides of the cutting portion 1b corresponding to the main cutting edge 1c, wherein the rake face 1d is of a planar structure, and has an included angle r relative to the axial line of the handle main body 1, in this embodiment, the included angle r is preferably set to 5 °, and the main rear face 1e is a helical inclined plane structure.

As shown in fig. 3, the part 2 has a central boss 2a, and an annular sunken groove 2b needs to be machined around the central boss 2a in a reaming manner, in the prior art, the annular sunken groove 2b is usually machined in a milling manner by using a milling cutter for a numerical control machining center machine tool to move along the circumferential direction of the central boss 2a, so that the efficiency is low.

As shown in fig. 4, if the annular sunken groove 2b is machined by using the drilling and milling cutter provided in this embodiment, the connecting end 11 of the drilling and milling cutter is mounted on the spindle of the milling machine or the drilling machine, and the central boss 2a of the part 2 is located in the avoidance central hole 1f, and then the machine tool drives the spindle to rotate, so that the annular sunken groove 2b can be quickly machined, and the machining efficiency is very high.

As shown in fig. 1 again, in order to further improve the stability of the cutting tool and ensure the machining quality, the cutting parts 1b are divided into two groups, the two groups of cutting parts 1b are symmetrically arranged at the end of the annular boss 1a, and the main back surface 1e of one group of cutting parts 1b spirally extends to the lower end of the rake surface 1d of the other group of cutting parts 1b, so as to effectively ensure the cutting strength of the juzhu cutting edge 1 c.

In order to ensure the cutting strength of the drilling and milling cutter, the material of the cutter handle main body 1 is tungsten steel, hard alloy or high-speed steel, and the hardness value of the cutting part 1b is HRC45-60 degrees so as to be convenient for different processing materials.

Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and scope of the present invention.

Claims (7)

1. The utility model provides a type brill milling cutter is dodged to center which characterized in that: including handle of a knife main part (1) that has link (11) and work end (12), the work end (12) of handle of a knife main part (1) are equipped with along axially extended annular boss (1 a), and the center of annular boss (1 a) forms dodges centre bore (1 f), and the terminal surface of annular boss (1 a) is equipped with along the outside cutting part (1 b) of extending of the axial of handle of a knife main part (1), and the outer end of cutting part (1 b) has main cutting edge (1 c) along the extension of annular boss (1 a) wall thickness direction.

2. The center-avoiding drill-mill cutter according to claim 1, wherein: the cutting part (1 b) is provided with a front tool face (1 d) and a main rear face (1 e) corresponding to two sides of the main cutting edge (1 c), wherein the front tool face (1 d) is of a plane structure, an included angle (r) is formed between the front tool face and the main tool handle body (1) relative to the axial lead of the main tool handle body, and the main rear face (1 e) is of a spiral inclined plane structure.

3. The center-avoiding drill-mill according to claim 2, wherein: said angle (r) is equal to 5 °.

4. The center-avoiding drill-milling cutter according to claim 2 or 3, wherein: the cutting parts (1 b) are arranged in two groups in total and are symmetrically arranged at the end part of the annular boss (1 a).

5. The center-avoiding drill-mill according to claim 4, wherein: wherein the main rear face (1 e) of one group of cutting portions (1 b) extends spirally to the lower end of the rake face (1 d) of the other group of cutting portions (1 b).

6. The center-avoiding drill-mill according to claim 1, wherein: the tool holder main body (1) is made of tungsten steel, hard alloy or high-speed steel.

7. The center-avoiding drill-mill according to claim 1, wherein: the hardness value of the cutting part (1 b) is HRC45-60 degrees.

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