CN204818201U - combination tool - Google Patents

Abstract

The utility model relates to a combined cutter, which comprises a cutter handle, a first cutting part and a second cutting part which are connected in sequence, wherein the cutter handle, the first cutting part and the second cutting part are provided with a same rotating central shaft; four cutters are uniformly arranged on the first cutting part surrounding the rotating central shaft, a first chip discharge groove which is obliquely arranged relative to the rotating central shaft is arranged between every two adjacent cutters, a spiral second chip discharge groove is formed in the second cutting part, and one end of the second chip discharge groove points to the first chip discharge groove; the cutter comprises a first blade and a second blade which are integrally formed and respectively close to the first cutting part and the second cutting part, and the rotating circumference diameter of the first blade is larger than that of the second blade. Through first and second cutting portion, realize the cutting to the not unidimensional groove of size or hole to merge multichannel cutting process, reduce the time of cutter figure and change cutter, reduce the influence to cutting accuracy. The first chip discharge groove is obliquely arranged relative to the rotating central shaft, so that generated chips can be smoothly discharged through the first chip discharge groove in time.

Description

combination tool

technical field

The utility model relates to a metal cutting tool, in particular to a combination cutter.

Background technique

A cutting tool is a tool used for cutting in mechanical manufacturing, also known as a cutting tool. Since the knives used in mechanical manufacturing are basically used to cut metal materials, "knife" is generally understood as a metal cutting tool.

When the tool rotates, it can complete the cutting process such as milling the end face, milling the counterbore, chamfering or turning the thread. However, when switching from one cutting process to another, the corresponding tool needs to be replaced. The number of cutting tools required increases the time for changing the cutting tools. In addition, changing the cutting tools easily affects the cutting accuracy.

Utility model content

Based on this, it is necessary to address the above-mentioned problems and provide a combined tool that can combine multiple cutting processes, reduce the number of tools and the time for tool replacement, and reduce the impact on cutting accuracy.

A combined cutter, comprising: a sequentially connected tool handle, a first cutting portion, and a second cutting portion, the tool handle, the first cutting portion, and the second cutting portion have the same central axis of rotation;

Four cutting knives are arranged on the first cutting part, and the four cutting knives are evenly arranged around the central axis of rotation, and a first chip removal groove is provided between two adjacent cutting knives. The first chip flute is arranged obliquely with respect to the central axis of rotation, and the second cutting part is provided with a helical second chip flute, and one end of the second chip flute close to the first cutting part points to the The first flute;

Each of the cutters includes an integrally formed first blade and a second blade, the first blade is disposed close to the first cutting portion, the second blade is disposed close to the second cutting portion, and the first The diameter of the rotation circle of the blade is larger than the diameter of the rotation circumference of the second blade.

The combined tool realizes the cutting of grooves or holes of different sizes through the first cutting part and the second cutting part, so as to combine multiple cutting processes, reduce the number of tools and the time for changing tools, and reduce the impact on cutting accuracy. The first chip flute is arranged obliquely with respect to the rotation center axis, so as to ensure that the chips generated by cutting can be discharged smoothly through the first chip flute in time.

In one of the embodiments, the junction of the first blade and the second blade is formed with an arc chamfer.

In one of the embodiments, the diameter of the rotation circle of the second cutting portion is smaller than the diameter of the rotation circle of the second blade.

In one of the embodiments, the diameter of the rotation circle of the first blade is larger than the circle diameter of the handle.

In one of the embodiments, the outer surface of the first cutting portion is coated with a titanium carbonitride layer.

In one of the embodiments, the outer surface of the second cutting portion is coated with an aluminum titanium nitride layer.

In one of the embodiments, the second cutting part is detachably connected to the first cutting part.

Description of drawings

Fig. 1 is a three-dimensional schematic diagram of a combined cutter according to an embodiment of the present invention;

FIG. 2 is an end view of the combination cutter shown in FIG. 1. FIG.

Detailed ways

As shown in FIG. 1 , it is a three-dimensional schematic diagram of a combination tool 10 according to an embodiment of the present invention. The combination tool 10 includes: a sequentially connected tool handle 100 , a first cutting portion 200 and a second cutting portion 300 , and the tool handle 100 , the first cutting portion 200 and the second cutting portion 300 have the same rotation center axis 011 . In this embodiment, the handle 100 is cylindrical.

The first cutting part 200 is provided with a first cutting knife 210, a second cutting knife 220, a third cutting knife 230 and a fourth cutting knife (not shown in Fig. 1 ). The three cutters 230 and the fourth cutter are uniformly arranged around the central axis of rotation 011 . A first flute 240 is provided between two adjacent cutters. Taking the second cutter 220 and the third cutter 230 as an example, a first chip flute is arranged between the second cutter 220 and the third cutter 230. Flutes 240 .

In order to ensure that the chips generated by cutting can be smoothly discharged through the first chip removal groove 240 in time when the combined tool 10 rotates at a high speed, the first chip removal groove 240 is inclined relative to the rotation center axis 011, that is, the first The extending direction of the flute 240 is not parallel to the longitudinal direction of the rotation central axis 011 . In this way, it is convenient to ensure that the chips generated by cutting can be smoothly discharged through the first chip removal groove 240 in time when the combined tool 10 rotates at a high speed. In order to further improve the timely and smooth discharge of generated chips through the first chip flute 240 , in this embodiment, the first chip flute 240 has a certain helicity. The second cutting portion 300 defines a helical second flute 310 . In order to facilitate the chips generated by the cutting of the second cutting part 300 to be discharged through the second chip flute 310 and the first chip flute 240 in sequence, one end of the second chip flute 310 close to the first cutting part 200 points to the first chip flute 240.

In order to adapt to the cutting of grooves or holes of different sizes, each cutter includes an integrally formed first blade and a second blade, the first blade is arranged near the first cutting part, the second blade is arranged near the second cutting part, and the first The diameter of the rotation circle of the blade is larger than the diameter of the rotation circumference of the second blade. Taking the second cutter 220 as an example, the second cutter 220 includes an integrally formed first blade 221 and a second blade 222, wherein the first blade 221 is arranged near the first cutting part 200, and the second blade 222 is arranged near the second cutting part 220. The part 300 is provided that the diameter of the rotation circumference of the first blade 221 is larger than the diameter of the rotation circumference of the second blade 222 .

In order to realize chamfering at the junction of the groove or hole formed by the cutting of the first blade and the groove or hole formed by cutting of the second blade, in this embodiment, an arc-shaped chamfer is formed at the junction of the first blade and the second blade. Taking the second cutter 220 as an example, the junction of the first blade 221 and the second blade 222 is formed with an arc chamfer.

In order to adapt to the cutting of slots or holes of smaller size, in this embodiment, the diameter of the rotation circle of the second cutting part 300 is smaller than the diameter of the rotation circle of the second blade 222 .

Please refer to FIG. 1 and FIG. 2 together. In order to adapt to the cutting of smaller grooves or holes, in this embodiment, the diameter of the rotation circle of the first blade 221 is larger than the circle diameter of the handle 100 .

In order to realize the cutting process of milling the end face with the combined tool 10 , the second cutting part 300 is detachably connected with the first cutting part 200 . In this way, the first cutting part 200 can complete the cutting work of milling the end face.

In order to enhance the wear resistance of the first cutting portion 200 , the outer surface of the first cutting portion 200 is coated with a titanium carbonitride layer, or the outer surface of the first cutting portion 200 is coated with an aluminum titanium nitride layer.

In order to enhance the wear resistance of the second cutting part 300, the outer surface of the second cutting part 300 is coated with an aluminum titanium nitride layer, or the outer surface of the second cutting part 300 is coated with a titanium carbonitride layer.

In order to facilitate replacement of the second cutting part 300 , the second cutting part 300 is detachably connected to the first cutting part 200 . In this way, after the second cutting part 300 is worn out, only the second cutting part 300 needs to be replaced, which saves the cost.

The above-mentioned combination tool 10 realizes the cutting of grooves or holes of different sizes through the first cutting part 200 and the second cutting part 300, so as to combine multiple cutting processes, reduce the number of tools and the time for changing tools, and reduce the impact on cutting accuracy. Influence. The first chip removal groove 240 is arranged obliquely relative to the rotation center axis 011 to ensure that the chips generated by cutting can be smoothly discharged through the first chip removal groove 240 in time.

The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

The above-mentioned embodiments only express several implementation modes of the utility model, and the description thereof is relatively specific and detailed, but it should not be understood as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the scope of protection of the utility model patent should be based on the appended claims.

Claims (7)

1. a gang tool, is characterized in that, comprising: the handle of a knife connected in turn, the first cutting portion and the second cutting portion, and described handle of a knife, described first cutting portion and described second cutting portion have same rotary middle spindle;

Described first cutting portion is provided with four cutting knifes, described four cutting knifes are evenly arranged around described rotary middle spindle, the first chip area is provided with between two adjacent described cutting knifes, described first chip area is obliquely installed relative to described rotary middle spindle, described second cutting portion offers spiral helicine second chip area, points to described first chip area near one end of the second chip area of described first cutting portion;

Cutting knife described in each comprises integrated first blade and the second blade, described first blade is arranged near described first cutting portion, described second blade is arranged near described second cutting portion, and the rotation round diameter of described first blade is greater than the rotation round diameter of described second blade.

2. gang tool according to claim 1, is characterized in that, the intersection of described first blade and described second blade forms arc angling.

3. gang tool according to claim 1, is characterized in that, the rotation round diameter of described second cutting portion is less than the rotation round diameter of described second blade.

4. gang tool according to claim 1, is characterized in that, the rotation round diameter of described first blade is greater than the circle diameter of described handle of a knife.

5. gang tool according to claim 1, is characterized in that, the outer surface of described first cutting portion has titanium carbonitride layer.

6. gang tool according to claim 1, is characterized in that, the outer surface of described second cutting portion has aluminium nitride titanium layer.

7. gang tool according to claim 1, is characterized in that, described second cutting portion and described first cutting portion removably connect.