CN214236448U

CN214236448U - Cutting insert and tool for square shoulder milling

Info

Publication number: CN214236448U
Application number: CN202023085959.XU
Authority: CN
Inventors: 李贤德; 邱伟平; 谭卓鹏; 殷磊; 袁大丽; 张德君; 孙书明; 刘春季
Original assignee: Ganzhou Achteck Tool Technology Co ltd
Current assignee: Ganzhou Achteck Tool Technology Co ltd
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2021-09-21
Anticipated expiration: 2030-12-17

Abstract

The utility model discloses a cutting blade for milling square shoulders, which comprises an upper end surface, a lower end surface and a plurality of side surfaces, wherein the upper end surface and the lower end surface are oppositely arranged, and the side surfaces extend between the upper end surface and the lower end surface; the side face comprises a main side face, and an arc side face, a light trimming side face, an anti-interference concave face and an anti-interference side face which are connected with two adjacent main side faces, wherein the anti-interference concave face and the anti-interference side face are arranged in parallel from top to bottom; the main side face, the arc-shaped side face, the light-trimming side face and the intersection of the upper end face form a main cutting edge, an arc-shaped edge and a light-trimming edge respectively, and the arc-shaped edge is connected with the main cutting edge and the light-trimming edge which are perpendicular to each other respectively. The utility model aims to solve the side afterbody of cutting blade among the prior art and easily form the friction to the cutting and interfere to make the high and with high costs technical problem of the degree of difficulty.

Description

Cutting insert and tool for square shoulder milling

Technical Field

The utility model belongs to the machining cutter field especially relates to a cutting blade and cutter that is used for square shoulder to mill.

Background

The cutting tool for milling the square shoulder is mainly used for rough milling, semi-finish milling and the like in machining, has wide application places, can be used for milling small planes, side surfaces and bottom surfaces of steps, slopes, grooves and the like, is flexible and convenient to use, has higher machining efficiency and precision, and generally fastens a tool body and a blade through a screw.

At present, there are many cutting inserts for square shoulder milling, for example, the cutting inserts described in the prior patents CN201380050845.5, CN102448648B, CN210937335U, etc., although these cutting inserts have good versatility, they have certain disadvantages: 1. in actual use, the tail part of the side surface of the cutting blade easily forms friction interference to cutting; 2. the bottom of the blade is additionally provided with an inward-inclined triangle, a reverse triangle platform is additionally arranged in a die cavity, the flow direction of powder is blocked, the density distribution of a pressed compact is easily uneven, the manufacturing and maintenance period and frequency of the die are increased, and the manufacturing difficulty and cost are increased.

1. The patent of CN201380050845.5 discloses a square shoulder milling tool, in which a triangular clearance surface inclined inward to the lower side surface is added at the bottom of the side surface, so as to avoid the possibility of bottom interference to some extent, but bring difficulty to production and manufacturing. The blade is produced by powder pressing and then sintering, after the inner inclined triangular blank avoiding surface is added, the angle between the side surface and the axis direction of the hole is increased, the blade becomes more gentle and is not beneficial to the flow of powder, the density is easily generated and concentrated to form cracks, the powder flow direction flows from the center to the peripheral side wall from top to bottom, the powder flow resistance is enlarged, the blade is not beneficial to production, and the manufacturing cost is increased. Meanwhile, the interference risk of the upper part of the side surface exists, the tail part of the upper cutting edge is easy to interfere with a workpiece due to insufficient space in practical application, and the clearance avoiding treatment is not carried out in the prior patent.

2. The CN102448648B patent discloses a cutting tool with a cutting edge flank having an angle change, in which the side flank of the cutting insert is apt to form frictional interference with the cutting in practical use

3. CN210937335U utility model patent increases the triangle-shaped face of keeping away of leaned on the downside in the side bottom, has avoided the possibility that the bottom is interfered to a certain extent, nevertheless can bring the difficulty for the production preparation, has enlarged the powder flow resistance, is unfavorable for production, increases the cost of manufacture, has side upper portion simultaneously and interferes the risk.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned shortcomings of the prior art, the present invention is directed to solving the technical problems of the prior art that the side tail of the cutting blade is prone to frictional interference with cutting, and the difficulty and cost of manufacturing are high.

This patent scheme provides a cutting insert for square shoulder milling, includes: comprises an upper end surface, a lower end surface and a plurality of side surfaces, wherein the upper end surface and the lower end surface are oppositely arranged, and the side surfaces extend between the upper end surface and the lower end surface; the side face comprises a main side face, and an arc side face, a light trimming side face, an anti-interference concave face and an anti-interference side face which are connected with two adjacent main side faces, wherein the anti-interference concave face and the anti-interference side face are arranged in parallel from top to bottom; the main side face, the arc-shaped side face, the light-trimming side face and the intersection of the upper end face form a main cutting edge, an arc-shaped edge and a light-trimming edge respectively, and the arc-shaped edge is connected with the main cutting edge and the light-trimming edge which are perpendicular to each other respectively.

Furthermore, the interference preventing concave surface comprises a concave bottom surface and a transition surface positioned between the concave bottom surface and the upper end surface, the main side surface, the interference preventing side surface and the light repairing side surface, and the concave bottom surface is in an inverted triangle shape.

Further, the included angle alpha 1 of the intersection of the anti-interference concave surface and the light-trimming side surface is 155-175 degrees.

Further, the main side surface comprises an upper main side surface connected with the upper end surface and a lower main side surface connected with the lower end surface, and a normal included angle beta 1 of the upper main side surface relative to the lower end surface is 4-12 degrees.

Further, the normal included angle beta 2 of the lower main side surface relative to the lower end surface is 13-25 degrees.

Further, the normal included angle omega of the light-trimming side face relative to the lower end face is 15-20 degrees.

Further, the normal included angle omega of the anti-interference concave surface relative to the lower end surface is 8-20 degrees.

Further, the joint of any two adjacent main side surfaces forms a corner, the upper end surface comprises a plurality of sub end surfaces extending along the main cutting edge, and the sub end surfaces are inclined inwards from the corner to opposite sides.

Further, the upper end surface is provided with an inward extending boss near the corner.

The cutting tool comprises a tool body and at least two cutting blades in any one of the technical schemes, the cutting blades are circumferentially arranged at one end of the side surface of the tool body, the upper end surface of each cutting blade is in the same direction with the axial direction of the tool body, and chip grooves are formed in the side surface of the tool body opposite to the upper end surface.

The improvement of this patent brings the following advantage:

(1) by arranging the anti-interference concave surface, the friction interference of the tail part of the side surface of the cutting blade on cutting in actual use is avoided, the possibility of impact and edge breakage on the cutting blade is reduced, the strength of the cutting blade is improved, the cutting blade can bear higher cutting force, and the durability of the cutting blade is enhanced;

(2) compared with the prior art, the method has the advantages that lower powder flow resistance can be generated in a model in the process of manufacturing the cutting blade by using a powder sintering method, so that the cutting blade is easier to manufacture, and the manufacturing difficulty and cost of the cutting blade are reduced.

Drawings

Fig. 1 is a perspective view of a cutting insert for square shoulder milling according to an embodiment of the present application;

FIG. 2 is a top view of a cutting insert for square shoulder milling in accordance with an embodiment of the present application;

fig. 3 is a front view of a cutting insert for square shoulder milling according to an embodiment of the present application;

FIG. 4 is a cross-sectional view taken along line B-B of FIG. 2;

FIG. 5 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 6 is a cross-sectional view taken along line C-C of FIG. 2;

FIG. 7 is an enlarged view of corner D shown in FIG. 2;

FIG. 8 is a schematic view of a cutting tool for square shoulder milling according to an embodiment of the present application;

FIG. 9 is a schematic view of a cutting tool for square shoulder milling according to an embodiment of the present application in operation when cutting a workpiece;

FIG. 10 is an enlarged view of E shown in FIG. 9;

wherein, 1 is an upper end face, 11 is a sub-end face, 2 is a lower end face, 31 is a main side face, 311 is an upper main side face, 312 is a lower main side face, 32 is an arc-shaped side face, 33 is a smoothing side face, 34 is an anti-interference concave face, 341 is a concave bottom face, 342 is a transition face, 35 is an anti-interference side face, 4 is a main cutting edge, 5 is an arc-shaped edge, 6 is a smoothing edge, 8 is a boss, 100 is a cutter body, 200 is a cutting blade, and 300 is a chip pocket.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

Referring to fig. 1-3, embodiment 1 of the present application provides a cutting insert 200 for square shoulder milling, which includes an upper end surface 1 and a lower end surface 2 disposed opposite to each other, and a plurality of side surfaces extending between the upper end surface 1 and the lower end surface 2; the side surface 3 comprises a main side surface 31 and other side surfaces for connecting two adjacent main side surfaces 31, the other side surfaces sequentially comprise an arc-shaped side surface 32, a light modification side surface 33, an interference preventing concave surface 34 and an interference preventing side surface 35, the interference preventing concave surface 34 and the interference preventing side surface 35 are arranged up and down, and the left side and the right side of the interference preventing concave surface are respectively connected with the main side surface 31 and the light modification side surface 33; the main side surface 31, the arc side surface 32 and the trimming side surface 33 are respectively formed at the intersection of the upper end surface 1, and form a main cutting edge 4, an arc edge 5 and a trimming edge 6, wherein the arc edge 5 is respectively connected with the main cutting edge 4 and the trimming edge 6 which are mutually perpendicular and adjacent.

The main cutting edge 4 is mainly used for rough machining with large cutting amount, and the smoothing edge 6 is mainly used for semi-finishing; referring to fig. 10, in practical use, since the cutting tool performs rotary cutting around the central axis of the tool, the anti-interference concave surface 34 designed in this embodiment will form a certain anti-interference area far away from the cutting area, so that on the basis of ensuring sufficient cutting depth and strength, the interference of the corner of the side surface of the cutting insert 200 on the cutting is avoided, the impact on the cutting insert 200 and the possibility of edge breakage are reduced, the cutting insert 200 can bear higher cutting force, and the durability and stability of the cutting insert 200 are enhanced.

As shown in fig. 3, the upper end surface 1 and the lower end surface 2 are arranged substantially parallel to each other, the side surface 3 forms an acute angle with respect to the upper end surface 1 and an obtuse angle with respect to the lower end surface 2, and the cutting insert 200 has an inverted, large-top and small-bottom truncated cone structure as a whole.

The upper end face 1 and the lower end face 2 are substantially regular triangles.

The center of the cutting insert 200 is provided with a mounting hole extending along an axis.

Referring to fig. 7, the included angle α 1 between the interference-preventing concave surface 34 and the light-modifying side surface 33 is 155 ° to 175 °.

Referring to fig. 4, the main side surface 31 includes an upper main side surface 311 connected to the upper end surface 1, and a lower main side surface 312 connected to the lower end surface 2, a normal included angle β 1 of the upper main side surface 311 with respect to the lower end surface 2 is 4 ° to 12 °, and a normal included angle β 2 of the lower main side surface 312 with respect to the lower end surface 2 is 13 ° to 25 °.

Referring to fig. 5, the normal included angle ω of the light-modifying side surface 33 with respect to the lower end surface 2 is 15 ° to 20 °.

Referring to fig. 6, the normal angle Ω of the interference preventing concave 34 with respect to the lower end surface 2 is 8 ° to 20 °.

The concave interference prevention surface 34 includes a concave bottom 341, and a transition surface 342 located between the concave bottom 341 and the upper end surface 1, the main side surface 31, the interference prevention side surface 35, and the trimming side surface 33, wherein the concave bottom 341 is substantially in an inverted triangle shape, and an included angle α 1 at an intersection of the concave bottom 341 and the trimming side surface 33 is 155 ° to 175 °.

Referring to fig. 7, a corner is formed at the joint of any two adjacent major side surfaces 31, the upper end surface 1 includes a plurality of sub end surfaces 11 extending along the major cutting edge 4, and the sub end surfaces 11 are inclined inward from the corner to the opposite side; the upper end face 1 is provided with inwardly extending bosses 8 near the corners.

Referring to fig. 8-10, in embodiment 2 of the present application, a cutting tool for square shoulder milling includes a tool body 100 and four cutting inserts 200 according to embodiment 1, wherein the tool body 100 is substantially cylindrical, one end of the tool body is a mounting end, the other end of the tool body is a machining end, the cutting inserts 200 are circumferentially mounted on a side surface 3 of the tool body 100 close to the machining end, an upper end surface 1 of the cutting inserts 200 is substantially perpendicular to an end surface of the tool body 100, or the upper end surface 1 of the cutting inserts 200 is substantially in the same direction as the axial direction of the tool body 100, a main cutting edge 4 is substantially parallel to the axial line of the tool body 100, and a chip pocket 300 is provided on a side surface of the tool body 100 opposite to the upper end surface 1 of the cutting inserts 200.

The number of blades 200 may be two or more, and may be set by those skilled in the art according to actual needs.

The insert 200 may be mounted to the cutter body 100 using a bolt fastening method.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A cutting insert for square shoulder milling comprising oppositely disposed upper and lower end surfaces, side surfaces extending between the upper and lower end surfaces; the side face comprises a main side face, and an arc side face, a light trimming side face, an anti-interference concave face and an anti-interference side face which are connected with two adjacent main side faces, wherein the anti-interference concave face and the anti-interference side face are arranged in parallel from top to bottom; the main side surface, the arc-shaped side surface, the light-trimming side surface and the intersection of the upper end surface form a main cutting edge, an arc-shaped edge and a light-trimming edge respectively, and the arc-shaped edge is connected with the main cutting edge and the light-trimming edge which are perpendicular to each other respectively.

2. The cutting insert for square shoulder milling of claim 1, wherein the concave interference prevention surface comprises a recessed bottom surface and transition surfaces between the recessed bottom surface and the upper end surface, the major side surface, the interference prevention side surface and the finishing side surface, and the recessed bottom surface has an inverted triangular shape.

3. The cutting insert for square shoulder milling according to claim 1, wherein an included angle α 1 at an intersection of the interference preventing concave surface and the wiper side surface is 155 ° to 175 °.

4. A cutting insert for square shoulder milling according to claim 1, wherein the major side surfaces comprise an upper major side surface connected to the upper end surface, and a lower major side surface connected to the lower end surface, the upper major side surface having an angle β 1 of 4 ° to 12 ° normal to the lower end surface.

5. A cutting insert for square shoulder milling according to claim 4, wherein the normal angle β 2 of the lower major side surface with respect to the lower end surface is between 13 ° and 25 °.

6. The cutting insert for square shoulder milling according to claim 1, wherein the normal angle ω of the wiper side surface with respect to the lower end surface is 15 ° to 20 °.

7. The cutting insert for square shoulder milling according to claim 1, wherein the normal angle Ω of the interference preventing concave surface with respect to the lower end surface is 8 ° to 20 °.

8. A cutting insert for square shoulder milling according to claim 1 wherein any two adjacent major side surfaces meet to form a corner, said upper end surface including a plurality of sub-end surfaces extending along said major cutting edge, said sub-end surfaces being inclined from said corner to opposite sides and inwardly.

9. The cutting insert for square shoulder milling of claim 8, wherein the upper end surface is provided with inwardly extending bosses proximate the corners.

10. A cutting tool for square shoulder milling, comprising a tool body, at least two cutting inserts as set forth in any of claims 1-9, said cutting inserts being circumferentially mounted at one end of a side surface of said tool body with an upper end surface thereof being in the same direction as an axial direction of said tool body, and chip pockets being provided on a side surface of said tool body opposite said upper end surface.