CN117444291A

CN117444291A - Welding cutting tool

Info

Publication number: CN117444291A
Application number: CN202311668164.7A
Authority: CN
Inventors: 贡小飞; 向常洪; 徐强; 路守义; 王强
Original assignee: Subao Precision Cutting Technology Suzhou Co ltd
Current assignee: Subao Precision Cutting Technology Suzhou Co ltd
Priority date: 2023-12-07
Filing date: 2023-12-07
Publication date: 2024-01-26

Abstract

The invention discloses a welding cutting tool, comprising: the cutter bar and the cutter head comprise a cutting part and an end tooth part; the cutting part comprises a first cutting edge and a second cutting edge, and a cutter groove is arranged between the first cutting edge and the second cutting edge; the end tooth part comprises an end edge and an end face, the end face comprises a front end face and a rear end face, the end edge is connected with the front end face and the rear end face, the rear end face comprises a first end face and a second end face, and the end face widths of the first end face and the second end face are increased and then reduced along the radian of the end edge. According to the invention, the chip flutes are replaced by symmetrically arranged cutter grooves, so that the discharge of chips can be more effectively guided and controlled, the abrasion and thermal deformation of the cutter are reduced, and the service life of the cutter is prolonged; the end teeth of the spiral ball head are adopted, and the end face width is increased and then reduced along the radian of the end edge, so that vibration and cutter abrasion can be reduced, and the service life of the cutter is prolonged; adopt smart steel stone welding cutter, reduce the grinding and polishing time of grinding apparatus, prolong the cycle that the cutter was changed, reduce the maintenance cost of grinding apparatus.

Description

Welding cutting tool

Technical Field

The invention relates to the technical field of machining tools, in particular to a welding cutting tool.

Background

The miniature diameter milling cutter is a high-efficiency cutter for machining small workpieces and thin sheet workpieces, is widely applied to precision hole system machining of automobile parts, electronic and electric product shells, instrument parts and the like, and finish machining procedures of cavities, pits and the like in die manufacturing at present, and is used as a universal tool for rough turning and finish grinding on a coordinate workbench of a numerical control machine tool or a five-axis linkage machine tool. The diameter of the micro-diameter milling cutter is usually between a few millimeters and tens of millimeters, and some even only a few hundredths of millimeters, so that the micro-diameter milling cutter can be used for machining parts and structures with extremely small sizes, and high-precision machining of workpieces, including surface finish and dimensional precision, is realized.

The selection of the micro-diameter milling cutter and the determination of the cutter dosage are important contents in the numerical control machining process, and the method not only affects the machining efficiency of a numerical control machine tool, but also directly affects the machining quality. Because of the limitations of materials and processing technology, the small-diameter cutters on the market at present are mainly made of traditional hard alloy materials, the processing life of the cutters is relatively short, the cutters can only process materials in the range from 20HRC to 60HRC, the cutter breakage phenomenon easily occurs in the cutting process, the processing requirements of materials with higher hardness cannot be met, the maintenance cost of a production line is increased, and the production efficiency is influenced.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides a welding cutting tool.

In order to achieve the above purpose, the present invention adopts the following technical scheme: a welding cutting tool comprising: the cutter bar and the cutter head are coaxial cylinders, and the cutter head comprises a cutting part and an end tooth part;

the cutting part comprises a first cutting edge and a second cutting edge which are symmetrically distributed in the center and cut along the feeding direction of the cutter, and a cutter groove is formed between the first cutting edge and the second cutting edge;

the end tooth part comprises an end edge and an end face, the end face comprises a front end face and a rear end face, the end edge is connected with the front end face and the rear end face, the rear end face comprises a first end face and a second end face, and the end face width of the first end face and the end face width of the second end face are increased and then reduced along the radian of the end edge.

As further description of the technical scheme, the cutter bar sequentially comprises a handle body part, a connecting part and a long neck part, the cutter head is made of fine steel stone, and the cutter head is welded below the long neck part of the cutter bar.

As a further description of the above technical solution, the shank portion has a shank diameter of 3-5mm, the connecting portion has a taper range of 50-80 °, the long neck portion has a length of 1-2mm, and the long neck portion has a neck diameter of 0.4-0.5mm.

As further description of the technical scheme, the line profile degree of the cutter bar and the cutter head is smaller than 0.002mm, and the circle runout of the cutter head is smaller than 0.001mm.

As a further description of the above technical solution, the diameter of the cutting portion is 0.5mm, and the effective edge length of the cutting portion is 0.38mm.

As a further description of the above technical solution, the peripheral edge rake angles of the first cutting edge and the second cutting edge are 1±1°, the Zhou Rendi relief angles of the first cutting edge and the second cutting edge are 16±1°, the Zhou Rendi relief angles of the first cutting edge and the second cutting edge are 26±2°, and the Zhou Rendi relief angle widths of the first cutting edge and the second cutting edge are 0.06±0.02mm.

As a further description of the above technical solution, the sipe is symmetrically disposed with respect to the first cutting portion and the second cutting portion, and the included angle of the sipe is 90 ° to 100 °.

As a further description of the above technical solution, the end tooth portion is hemispherical, and the radius of the ball head of the end tooth portion is 0.25±0.01mm.

As a further description of the above technical solution, the first eccentricity of the end tooth is 0.005-0.015mm and the second eccentricity of the end tooth is 0.02-0.04mm.

As a further description of the above technical solution, the initial end face widths of the first end face and the second end face are 0.08±0.05mm, the end face widths of the first end face and the second end face are 0.11±0.05mm, and the end face widths of the first end face and the second end face located at the radius of the half ball head are 0.12±0.05mm.

The invention has the following beneficial effects:

1. according to the invention, the chip flutes are replaced by symmetrically arranged cutter grooves, so that the discharge of chips can be more effectively guided and controlled, the abrasion and thermal deformation of the cutter are reduced, and the service life of the cutter is prolonged;

2. according to the invention, the spiral ball end teeth are adopted, the end face widths of the first end face and the second end face are increased and then reduced along the end edge radian, so that the cutting force can be more effectively distributed in the cutting process, and the vibration and cutter abrasion in the cutting process are reduced, thereby prolonging the service life of the cutter;

3. according to the invention, the diamond welding tool is adopted, and the processing object can be processed for a long time from quenched and tempered steel to quenched steel with the hardness of more than 60HRC, so that the cutting sharpness of the tool can be improved, the grinding and polishing time of the grinding tool can be reduced, the replacement period of the tool can be prolonged, and the maintenance cost of the grinding tool can be reduced.

Drawings

FIG. 1 is a schematic view of a welding cutting tool according to the present invention;

FIG. 2 is a schematic front view of the tool tip of FIG. 1;

FIG. 3 is a schematic cross-sectional view of the axial cutter of FIG. 1;

FIG. 4 is an enlarged view of a portion of the tool tip of FIG. 1;

fig. 5 is a schematic view of the change in the width of the rear end face in fig. 1.

Legend description:

1. a cutter bar; 11. a shank portion; 12. a connection part; 13. a long neck; 2. a cutter head; 21. a cutting portion; 211. a first cutting edge; 212. a second cutting edge; 213. a knife slot; 22. an end tooth portion; 221. an end blade; 222. an end face; 2221. a front end face; 2222. a rear end face; 2223. a first end face; 2224. a second end face.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1-5, an embodiment of a welding cutting tool provided by the present invention includes: the cutter bar 1 and the cutter head 2 are coaxial cylinders, and the cutter bar 1 sequentially comprises a handle body part 11, a connecting part 12 and a long neck part 13. Specifically, the tool bit 2 is made of fine steel stone, and the tool bit 2 is welded below the long neck 13 of the tool bar 1. The diamond has excellent hardness and wear resistance, can cope with wide processing objects, including quenched and tempered steel, quenched steel with the hardness of more than 60HRC and other high-hardness materials, so that the cutter can keep a sharper cutting edge in the processing process, the cutting capability of the cutter head 2 is effectively improved, the abrasion degree of a grinding tool is reduced, and the maintenance cost is reduced.

Further, the shank diameter phi of the shank 11 is 3-5mm, the taper theta of the connecting portion 12 is 50-80 degrees, the length La of the long neck 13 is 1-2mm, the neck diameter J of the long neck 13 is 0.4-0.5mm, and thus the design can effectively balance the connection stability and the operation flexibility of the cutter head 2 and the cutter bar 1. The line profile degree of the cutter bar 1 and the cutter head 2 is smaller than 0.002mm, and the circle runout of the cutter head 2 is smaller than 0.001mm.

With continued reference to fig. 1-4, in the present embodiment, the tool bit 2 is composed of a cutting portion 21 and an end tooth portion 22, and the cutting portion 21 includes a first cutting edge 211 and a second cutting edge 212 which are symmetrically arranged in the center and cut in the tool feeding direction. The end tooth portion 22 is hemispherical, and the radius R of the ball is 0.25 + -0.01 mm. Furthermore, the first eccentricity e1 of the end tooth 22 is between 0.005-0.015mm, while the second eccentricity J1 is between 0.02-0.04mm. When the tool is cutting a workpiece, unavoidable vibrations and impacts sometimes occur, which may cause minute projections and depressions on the surface of the tool, thereby accelerating wear of the tool. The spiral ball end tooth design is adopted, so that the influence of vibration and impact can be reduced, the abrasion degree of the cutter is reduced, and the service life of the cutter is prolonged. In addition, the end teeth of the spiral ball head can also improve the stability and accuracy of cutting, thereby better meeting the requirement of high-precision cutting

Further, the peripheral edge rake angle β2 of the first cutting edge 211 and the second cutting edge 212 is 1±1°, the Zhou Rendi-relief angle α3 of the first cutting edge 211 and the second cutting edge 212 is 16±1°, the Zhou Rendi-relief angle α4 of the first cutting edge 211 and the second cutting edge 212 is 26±2°, and the Zhou Rendi-relief angle width f3 of the first cutting edge 211 and the second cutting edge 212 is 0.06±0.02mm.

With continued reference to fig. 1-4, in the present embodiment, a flute 213 is provided between the first cutting edge 211 and the second cutting edge 212. Specifically, the diameter D of the cutting portion 21 is 0.5mm, and the effective edge length FL of the cutting portion 21 is 0.38mm. The sipes 213 are symmetrically arranged with respect to the first cutting portion 21 and the second cutting portion 21, and an included angle Z-J of the sipes 213 is 90-100 °.

With continued reference to fig. 4 and 5, in the present embodiment, the end tooth portion 22 includes an end edge 221 and an end surface 222, the end surface 222 includes a front end surface 2221 and a rear end surface 2222, the end edge 221 connects the front end surface 2221 and the rear end surface 2222, the rear end surface 2222 includes a first end surface 2223 and a second end surface 2224, and the end surface widths of the first end surface 2223 and the second end surface 2224 increase and decrease along the arc of the end edge 221. Specifically, the initial end face width hwa of the first end face 2223 and the second end face 2224 is 0.08±0.05mm, the end face width hwb of the first end face 2223 and the second end face 2224 is 0.11±0.05mm, and the end face 222 width h of the first end face 2223 and the second end face 2224 at the radius of the half ball head is 0.12±0.05mm. The gradual end face width can effectively optimize the distribution of cutting force, thereby reducing vibration and cutter abrasion in the cutting process. The special radian and shape of the spiral ball end teeth can enable cutting force to be distributed on the surface of the cutter more uniformly, effectively relieve pressure born by the surface of a workpiece, reduce stress concentration in the cutting process and reduce the risk of fatigue of the cutter. In addition, the design that the width of the end face 222 of the end tooth of the spiral ball head is increased and then decreased along the radian of the end edge 221 can further increase the service life of the cutter.

Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present invention.

Claims

1. A welding and cutting tool, comprising: the cutter bar (1) and the cutter head (2), wherein the cutter bar (1) and the cutter head (2) are coaxial cylinders, and the cutter head (2) comprises a cutting part (21) and an end tooth part (22);

the cutting part (21) comprises a first cutting edge (211) and a second cutting edge (212) which are symmetrically distributed at the center and cut along the feeding direction of the cutter, and a cutter groove (213) is arranged between the first cutting edge (211) and the second cutting edge (212);

the end tooth part (22) comprises an end edge (221) and an end face (222), the end face (222) comprises a front end face (2221) and a rear end face (2222), the end edge (221) is connected with the front end face (2221) and the rear end face (2222), the rear end face (2222) comprises a first end face (2223) and a second end face (2224), and the width of the end face (222) of the first end face (2223) and the width of the end face (2224) are increased and then reduced along the radian of the end edge (221).

2. A welding and cutting tool according to claim 1, characterized in that the tool holder (1) comprises in sequence a shank portion (11), a connecting portion (12) and a long neck portion (13), the tool head (2) is made of fine steel stone material, and the tool head (2) is welded below the long neck portion (13) of the tool holder (1).

3. A welding cutting tool according to claim 2, wherein the shank portion (11) has a shank diameter of 3-5mm, the connecting portion (12) has a taper in the range of 50-80 °, the long neck portion (13) has a length of 1-2mm, and the long neck portion (13) has a neck diameter of 0.4-0.5mm.

4. A welding cutting tool according to claim 1, characterized in that the line profile of the tool shank (1) and the tool head (2) are each less than 0.002mm, and that the tool head (2) is each less than 0.001mm in runout.

5. A welding cutting tool according to claim 1, characterized in that the diameter of the cutting portion (21) is 0.5mm, the effective edge length of the cutting portion (21) being 0.38mm.

6. The welding cutting tool according to claim 1, wherein the peripheral edge rake angle of the first cutting edge (211) and the second cutting edge (212) is 1 ± 1 °, the relief angle Zhou Rendi of the first cutting edge (211) and the second cutting edge (212) is 16 ± 1 °, the relief angle Zhou Rendi of the first cutting edge (211) and the second cutting edge (212) is 26 ± 2 °, and the Zhou Rendi relief angle width of the first cutting edge (211) and the second cutting edge (212) is 0.06 ± 0.02mm.

7. A welding cutting tool according to claim 1, characterized in that the pocket (213) is symmetrically arranged with respect to the first cutting edge (211) and the second cutting edge (212), the pocket (213) having an angle of 90-100 °.

8. The welding cutting tool as set forth in claim 1, wherein the end tooth (22) is hemispherical, and a ball radius of the end tooth (22) is 0.25 ± 0.01mm.

9. A welding cutting tool according to claim 1, characterized in that the first eccentricity of the end tooth (22) is 0.005-0.015mm and the second eccentricity of the end tooth (22) is 0.02-0.04mm.

10. The welding cutting tool according to claim 1, wherein a starting end face (222) of the first end face (2223) and the second end face (2224) has a width of 0.08 ± 0.05mm, a cut-off end face (222) of the first end face (2223) and the second end face (2224) has a width of 0.11 ± 0.05mm, and an end face (222) of the first end face (2223) and the second end face (2224) located at a half ball radius has a width of 0.12 ± 0.05mm.