CN219598201U - Forming cutter - Google Patents

Abstract

The utility model provides a forming cutter, which comprises a cutting main body, wherein a first spiral groove and a second spiral groove are sequentially formed in the surface of the cutting main body along the axial direction of the cutting main body, the spiral direction of one of the first spiral groove and the second spiral groove is a left spiral, the spiral direction of the other one of the first spiral groove and the second spiral groove is a right spiral, and the starting position of the second spiral groove deflects a preset indexing angle relative to the ending position of the first spiral groove along the circumferential direction of the cutting main body so as to index the first spiral groove and the second spiral groove. The forming cutter can effectively change the cutting resistance generated by the cutter during cutting and disperse the cutting resistance, thereby prolonging the service life of the cutter, effectively solving the problem that the dosage of the cutter at the client exceeds the standard, reducing the cutter changing frequency of a machine and improving the production efficiency.

Description

Forming cutter

Technical Field

The utility model relates to the technical field of machining, in particular to a forming cutter.

Background

The forming cutter commonly uses a single-screw structure, and if the cutter is designed into a right-screw structure, the rear profile of the cutter is easy to collapse during processing, because the cutting resistance of the rear profile is much larger than that of the front profile during processing; if the cutter is designed into a left spiral structure, the front profile of the cutter is easy to break during processing, because the cutting resistance of the front profile is much larger than that of the rear profile during processing; the root cause of this chipping is due to uneven cutting resistance of the tool during machining. At present, chinese patent CN212526221U discloses a double-spiral concave forming cutter, and the scheme is that the left chute is matched with the right chute, so that the impact force of the cutter during cutting can be reduced to a certain extent, but the cutting resistance of the cutter, which is influenced by the chute, is not improved, and the cutter is easy to resonate during cutting.

Therefore, it is necessary to provide a molding tool that can effectively change the cutting resistance generated when the tool is cutting and disperse the cutting resistance.

Disclosure of Invention

The utility model aims to provide a forming tool which can effectively change the cutting resistance generated by the tool during cutting and disperse the cutting resistance.

In order to achieve the above object, the present utility model provides a forming tool, comprising a cutting body, wherein a surface of the cutting body is sequentially provided with a first spiral groove and a second spiral groove along an axial direction thereof, a spiral direction of one of the first spiral groove and the second spiral groove is a left spiral, a spiral direction of the other of the first spiral groove and the second spiral groove is a right spiral, and a starting position of the second spiral groove is deflected by a preset indexing angle along a circumferential direction of the cutting body relative to an ending position of the first spiral groove so as to index the first spiral groove and the second spiral groove.

Preferably, the spiral direction of the first spiral groove is right spiral, and the spiral direction of the second spiral groove is left spiral.

Preferably, the helix angle of the first helical groove is 30 degrees, and the helix angle of the second helical groove is 30 degrees.

Preferably, the starting position of the second spiral groove and the ending position of the first spiral groove have an overlapping area.

Preferably, the plurality of first spiral grooves are arranged at intervals along the same circumferential direction of the cutting main body, so that a plurality of first chip cutting edges are formed in the same circumferential direction of the cutting main body, a first groove-shaped angle is formed between two adjacent first chip cutting edges, and the first groove-shaped angles are arranged in a non-equal manner.

Preferably, the plurality of second spiral grooves are arranged at intervals along the same circumferential direction of the cutting body, so as to form a plurality of second cutting edges in the same circumferential direction of the cutting body, and a second groove angle is formed between two adjacent second cutting edges, and the second groove angles are arranged in unequal intervals.

Preferably, the indexing angle is 45 degrees.

Preferably, the fluted core diameter of the cutting body is 40% of its maximum blade diameter.

Preferably, the cutting body sequentially forms a first flank, a second flank and a third flank at positions between two adjacent first spiral grooves, and relief angles corresponding to the first flank, the second flank and the third flank are sequentially increased.

Preferably, the cutting body sequentially forms a fourth flank, a fifth flank and a sixth flank at positions between two adjacent second spiral grooves, and the relief angles corresponding to the fourth flank, the fifth flank and the sixth flank are sequentially increased.

Compared with the prior art, the forming cutter has the advantages that the first spiral groove and the second spiral groove with different spiral directions are sequentially formed in the cutting main body along the axial direction of the forming cutter by changing the grooving structure of the cutter, so that the cutting resistance of the cutter is changed, the uniformity and the stability of the cutting force of the cutter are effectively ensured, and the cutting resistance of the cutter is dispersed by dividing the first spiral groove and the second spiral groove, so that the cutting resonance is reduced. Therefore, the forming cutter can effectively change the cutting resistance generated by the cutter during cutting and disperse the cutting resistance, thereby prolonging the service life of the cutter, effectively solving the problem that the dosage of the cutter at the client exceeds the standard, reducing the cutter changing frequency of a machine and improving the production efficiency.

Drawings

Fig. 1 is a perspective view of a forming tool according to the present utility model.

Fig. 2 is a front view of the forming tool of the present utility model.

Fig. 3 is a structural view of the helix angle of the first helical flute and the helix angle of the second helical flute of the forming tool of the present utility model.

Fig. 4 is a structural view of the overlapping area of the helix angle of the first helical flute and the second helical flute of the forming tool of the present utility model.

Fig. 5 is a partial structural view of the forming tool of the present utility model.

Fig. 6 is a cross-sectional view taken along A-A in fig. 4.

Fig. 7 is a sectional view taken along the direction B-B in fig. 4.

Detailed Description

In order to describe the technical content and constructional features of the present utility model in detail, the following description will be made with reference to the embodiments in conjunction with the accompanying drawings.

Referring to fig. 1 and 2, a forming tool 100 of the present utility model includes a cutting body 1 and a shank 2 connected to the cutting body 1. Wherein the surface of the cutting body 1 is provided with a first helical groove 11 and a second helical groove 12 in sequence along the axial direction thereof, the helical direction of one of the first helical groove 11 and the second helical groove 12 is a left helix, the helical direction of the other of the first helical groove 11 and the second helical groove 12 is a right helix, and the start position of the second helical groove 12 is deflected by a preset indexing angle along the circumferential direction of the cutting body 1 with respect to the end position of the first helical groove 11, so that the first helical groove 11 and the second helical groove 12 are indexed. The forming cutter 100 of the utility model changes the cutting resistance of the cutter by changing the grooving structure of the cutter and sequentially arranging the first spiral groove 11 and the second spiral groove 12 with different spiral directions on the cutting main body 1 along the axial direction of the cutting main body, thereby effectively ensuring the uniformity and the stability of the cutting force of the cutter, and dispersing the cutting resistance of the cutter and reducing the cutting resonance by dividing the first spiral groove 11 and the second spiral groove 12. In the present embodiment, the indexing angle is 45 degrees, and by setting the indexing angle to 45 degrees, the cutting resistance of the cutter can be more fully dispersed, and the service life of the cutter can be improved, but the size of the indexing angle is not limited to this.

Referring to fig. 1 to 3, in the present embodiment, the spiral direction of the first spiral groove 11 is a right spiral, the spiral direction of the second spiral groove 12 is a left spiral, but not limited thereto, for example, in other embodiments, the spiral direction of the first spiral groove 11 may be a left spiral, and the spiral direction of the second spiral groove 12 may be a right spiral. Specifically, the helix angle of the first helical groove 11 is 30 degrees, the helix angle of the second helical groove 12 is 30 degrees, so that the cutting edge can be prevented from being worn too fast while the cutting is effectively ensured, and the service life of the cutter is prolonged, as shown in fig. 3, W1 represents the helix angle of the first helical groove 11, W2 represents the helix angle of the second helical groove 12, the size of W1 is 30 degrees, and the size of W2 is 30 degrees. However, the helix angle of the first helical groove 11 and the helix angle of the second helical groove 12 are not limited thereto.

Referring to fig. 2 and 4, in the present embodiment, the starting position of the second spiral groove 12 and the ending position of the first spiral groove 11 have an overlapping area, so as to effectively ensure the continuity of chip removal during cutting of the tool, and also ensure the service life of the tool, wherein H1 in fig. 4 represents the range of the first spiral groove 11, H2 represents the starting point of the second spiral groove 12, H3 represents the range of the second spiral groove 12, and P represents the overlapping area between the starting position of the second spiral groove 12 and the ending position of the first spiral groove 11.

Referring to fig. 5 to 7, a plurality of first spiral grooves 11 are arranged at intervals along the same circumferential direction of the cutting body 1 to form a plurality of first chip edges 13 in the same circumferential direction of the cutting body 1, and a first groove angle is formed between two adjacent first chip edges 13 and is arranged in unequal intervals. The plurality of second helical flutes 12 are arranged at intervals along the same circumferential direction of the cutting body 1 to form a plurality of second chip edges 14 in the same circumferential direction of the cutting body 1, and a second flute angle is formed between two adjacent second chip edges 14, the second flute angles being arranged unevenly. The distribution of the first groove-shaped angles and the distribution of the second groove-shaped angles are not equally distributed, so that vibration of the cutter during cutting is reduced, and the service life of the cutter is prolonged. Specifically, the number of the first and second spiral grooves 11, 12 is four, the number of the first and second chip edges 13, 14 is also four, and the number of the first and second flute angles is also four. As shown in fig. 6, M represents a first groove angle, and as shown in fig. 7, N represents a second groove angle, in this embodiment, the angles of the first groove angle M in the clockwise direction are 87 degrees, 93 degrees, 87 degrees, and 93 degrees in this order, and the angles of the second groove angle N in the clockwise direction are 93 degrees, 87 degrees, 93 degrees, and 87 degrees in this order. But is not limited thereto.

Referring to fig. 2, in the present embodiment, the grooving core diameter of the cutting body 1 is 40% of the maximum edge diameter, so that the lowest position of the cutter contour is effectively ensured to have enough groove depth.

Referring to fig. 5, the cutting body 1 sequentially forms a first flank 151, a second flank 152 and a third flank 153 at a position between two adjacent first spiral grooves 11, the rake angles corresponding to the first flank 151, the second flank 152 and the third flank 153 sequentially increase, the cutting body 1 sequentially forms a fourth flank 154, a fifth flank 155 and a sixth flank 156 at a position between two adjacent second spiral grooves 12, and the rake angles corresponding to the fourth flank 154, the fifth flank 155 and the sixth flank 156 sequentially increase, thereby ensuring that the rake angles do not interfere with each other during front and rear grinding. In the present embodiment, the relief angles corresponding to the first relief surface 151, the second relief surface 152 and the third relief surface 153 may be 10 degrees, 20 degrees and 30 degrees in sequence, and the relief angles corresponding to the fourth relief surface 154, the fifth relief surface 155 and the sixth relief surface 156 may be 10 degrees, 20 degrees and 30 degrees in sequence, but not limited thereto.

In summary, the forming cutter 100 of the present utility model sequentially sets the first spiral groove 11 and the second spiral groove 12 with different spiral directions on the cutting main body 1 along the axial direction thereof by changing the grooving structure of the cutter, thereby changing the cutting resistance of the cutter, effectively ensuring the uniformity and stability of the cutting force of the cutter, dispersing the cutting resistance of the cutter by indexing the first spiral groove 11 and the second spiral groove 12, reducing the cutting resonance, thereby improving the service life of the cutter, effectively solving the problem of exceeding the dosage of the cutter at the client, reducing the tool changing frequency of the machine, and improving the production efficiency. The forming cutter 100 of the utility model is also beneficial to reducing the vibration of the cutter during cutting and further prolonging the service life of the cutter by arranging the distribution of the first groove-shaped angle and the distribution of the second groove-shaped angle to be not equally divided.

The foregoing disclosure is only illustrative of the preferred embodiments of the present utility model and is not to be construed as limiting the scope of the utility model, which is defined by the appended claims.

Claims (10)

1. The forming cutter is characterized by comprising a cutting main body, wherein a first spiral groove and a second spiral groove are sequentially formed in the surface of the cutting main body along the axial direction of the cutting main body, the spiral direction of one of the first spiral groove and the second spiral groove is left spiral, the spiral direction of the other one of the first spiral groove and the second spiral groove is right spiral, and the starting position of the second spiral groove deflects by a preset indexing angle along the circumferential direction of the cutting main body relative to the ending position of the first spiral groove so that the first spiral groove and the second spiral groove are indexed.

2. The forming tool of claim 1, wherein the helical direction of the first helical flute is right helical and the helical direction of the second helical flute is left helical.

3. The forming tool of claim 1, wherein the helix angle of the first helical flute is 30 degrees and the helix angle of the second helical flute is 30 degrees.

4. The forming tool of claim 1, wherein a start position of the second helical groove and an end position of the first helical groove have an overlap region.

5. The forming tool according to claim 1, wherein a plurality of the first spiral grooves are arranged at intervals along the same circumferential direction of the cutting body so as to form a plurality of first chip edges in the same circumferential direction of the cutting body, and a first groove-shaped angle is formed between two adjacent first chip edges, and the first groove-shaped angles are arranged in unequal intervals.

6. The forming tool according to claim 1, wherein a plurality of the second spiral grooves are arranged at intervals along the same circumferential direction of the cutting body to form a plurality of second chip edges in the same circumferential direction of the cutting body, and a second flute angle is formed between two adjacent second chip edges, the second flute angles being arranged unevenly.

7. The forming tool of claim 1, wherein the indexing angle is 45 degrees.

8. The forming tool of claim 1, wherein the fluted core of the cutting body is 40% of its maximum blade diameter.

9. The forming tool according to claim 1, wherein the cutting body sequentially forms a first flank, a second flank, and a third flank at a position between adjacent two of the first helical grooves, and relief angles corresponding to the first flank, the second flank, and the third flank sequentially increase.

10. The forming tool according to claim 1, wherein the cutting body sequentially forms a fourth flank, a fifth flank, and a sixth flank at a position between adjacent two of the second spiral grooves, and relief angles corresponding to the fourth flank, the fifth flank, and the sixth flank sequentially increase.