CN216065727U - Left-handed T-shaped cutter - Google Patents

Abstract

The utility model discloses a left-handed T-shaped knife which comprises a knife handle, a knife neck and a T-shaped knife head which are coaxial; the cutter head comprises a cutting part and a connecting part which are coaxial, the connecting part is connected with the cutter neck, and six forming blades are spirally wound on the cutting part at equal intervals in a left-hand mode; chip grooves are formed between every two forming blades, and one end part of each chip groove extends to the connecting part; the six forming edges and the chip grooves form an end tooth together at the end part of the cutter head, and the center height of the end tooth is lower than the height of the side wall of the end tooth. The multi-tooth left-handed cutting blade is arranged on the multi-tooth left-handed cutting blade, so that the cutting efficiency is improved, the precision and the smoothness of a cutting surface are improved, and the multi-tooth left-handed cutting blade can be used for cutting and molding the surfaces of various high-precision products; through setting up in chip groove, third face and the fourth face that the chip groove meets, can enlarge the accommodation area of sweeps on the tool bit, the sweeps of being convenient for is discharged from the tool bit fast, avoids the sweeps to pile up the temperature rise that leads to too fast, each cutting edge on the protection cutter to avoid the sweeps fish tail work piece surface.

Description

Left-handed T-shaped cutter

Technical Field

The utility model relates to the technical field of machining tools, in particular to a left-handed T-shaped cutter.

Background

The T-shaped cutter is generally used for cutting a T-shaped groove or a side groove on a workpiece, most of conventional T-shaped cutters are right-handed cutters, the technology for producing the cutters is mature, and the cutters have stable cutting performance; on the other hand, the cutter head structure of the T-shaped cutter determines that the radial stress capacity is relatively small; thus, in actual production, T-knives are typically used to machine grooves or bevels of conventional finish requirements. However, with the development of product technology, the surface of many special-shaped structures becomes the matching surface or working surface of the product, and high-precision flatness or smoothness is required, and the conventional T-shaped knife cannot meet the requirement of machining precision.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems in the prior art, the utility model provides the left-handed T-shaped cutter which can improve the cutting efficiency, improve the precision and the smoothness of the cut surface, be used for cutting and forming the surfaces of various high-precision products, avoid the over-high temperature rise caused by accumulation of waste chips, protect each cutting edge on the cutter and prevent the waste chips from scratching the surface of a workpiece.

In order to solve the technical problems, the utility model adopts a technical scheme as follows:

a left-handed T-shaped knife comprises a knife handle, a knife neck and a T-shaped knife head which are coaxial; the cutter head comprises a cutting part and a connecting part which are coaxial, the connecting part is connected with the cutter neck, and six forming blades are spirally wound on the cutting part at equal intervals in a left-hand rotation manner; chip grooves are formed between every two forming blades, and one end part of each chip groove extends to the connecting part; six the shaping sword with the chip groove is in jointly the tip of tool bit all forms an end tooth, the central height of end tooth is less than the height of its lateral wall.

As a further elaboration of the above technical solution:

in the above technical solution, the cutting portion is a frustum shape, and a taper angle thereof is between 38 ° and 42 °.

In the above technical solution, the helix angle of each forming edge is the same, and the helix angle is between 33 ° and 37 °.

In the technical scheme, the center of the end tooth is provided with the chip flutes, and the chip flutes are communicated with the chip flutes.

In the above technical solution, each of the forming edges is formed with an inclined land, a first surface and a second surface are respectively formed on two sides of the land, a first cutting edge is formed between the first surface and the land, and a second cutting edge is formed between the second surface and the land.

In the above technical solution, a third surface and a fourth surface which are inclined and connected are formed on the rear end surface of each forming blade, the third surface is connected with the blade band, the fourth surface is connected with the connecting portion, and the third surface and the fourth surface are connected with the chip groove; and a rear angle is formed between the third surface and the blade band, and an inward-inclined dish-shaped angle is formed between the third surface and the fourth surface.

Compared with the prior art, the utility model has the beneficial effects that: the multi-tooth left-handed cutting blade is arranged on the multi-tooth left-handed cutting blade, so that the cutting efficiency is improved, the precision and the smoothness of a cutting surface are improved, and the multi-tooth left-handed cutting blade can be used for cutting and molding the surfaces of various high-precision products; through setting up in chip groove, third face and the fourth face that the chip groove meets, can enlarge the accommodation area of sweeps on the tool bit, the sweeps of being convenient for is discharged from the tool bit fast, avoids the sweeps to pile up the temperature rise that leads to too fast, each cutting edge on the protection cutter to avoid the sweeps fish tail work piece surface.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a front view of a cutting head according to the present invention;

FIG. 3 is a rear view of a cutting head according to the present invention;

FIG. 4 is a schematic cross-sectional view of a shaped edge of the present invention;

FIG. 5 is a schematic view of the structure of the shaped blade of the present invention.

In the figure: 10. a knife handle; 20. a cutter neck; 30. a cutter head; 31. a cutting portion; 32. a connecting portion; 40. forming a blade; 50. a chip groove; 60. an end tooth; 70. a chip pocket; 1. a margin; 2. a first side; 3. a second face; 4. a first cutting edge; 5. a second cutting edge; 6. a third surface; 7. a fourth surface; a. a cone angle; b. a helix angle; c. a first radial tilt angle; d. a first axial tilt angle; e. a second radial tilt angle; f. a second axial tilt angle; g. radial inclination angle of the blade band; h. the axial inclination angle of the blade band.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The embodiments described by referring to the drawings are exemplary and intended to be used for explaining the present application and are not to be construed as limiting the present application. In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus should not be considered limiting. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise. In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate. In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

As shown in fig. 1-3, a left-handed T-shaped knife comprises a handle 10, a neck 20 and a T-shaped cutting head 30 which are coaxial; the cutter head 30 comprises a cutting part 31 and a connecting part 32 which are coaxial, the connecting part 32 is connected with the cutter neck 20, and six forming blades 40 are spirally wound on the cutting part 31 at equal intervals in a left-hand mode; chip grooves 50 are formed between every two forming blades 40, and one end part of each chip groove 50 extends to the connecting part 32; the six forming edges 40 and flutes 50 together form an end tooth 60 at the end of the cutter head 30, the center height of the end tooth 60 being less than the height of the side walls thereof.

In the embodiment, the tool bit 20 adopts a six-tooth left-handed structure, so that the cutting efficiency is high, the precision and the smoothness of the cut surface are higher, and the cut surface can be used as a matching surface or a working surface of a workpiece, and is suitable for the cutting forming process of the surfaces of various high-precision products.

Further, the cutting portion 31 has a frustum shape with a taper angle a between 38 ° and 42 °.

It can be understood that the taper angle a can reduce the cutting area of the end tooth 60 during the cutting process, reduce the radial stress of the end tooth 60, delay the abrasion of the end tooth 60, and facilitate the prolonging of the service life of the cutter.

Further, the helix angle b of each forming edge 40 is the same, and the helix angle b is between 33 ° and 37 °.

Further, the center of the end tooth 60 is formed with a chip flute 70, and the chip flute 70 communicates with each chip flute 50.

During cutting, the scraps cut by the end teeth 60 firstly enter the scrap grooves 70 in the center of the end part and are distributed into the scrap grooves 50, the scraps are quickly and smoothly discharged, the phenomenon that the temperature rises too fast due to accumulation of the scraps is avoided, cutting edges on a cutter are protected, and the scraps are prevented from scratching the surface of a workpiece.

As shown in fig. 2, each forming edge 40 is formed with an inclined land 1, a first surface 2 and a second surface 3 are respectively formed on both sides of the land 1, a first cutting edge 4 is formed between the first surface 2 and the land 1, and a second cutting edge 5 is formed between the second surface 3 and the land 1.

As shown in fig. 3, a third surface 6 and a fourth surface 7 which are inclined and connected are formed on the rear end surface of each forming edge 40, the third surface 6 is connected with the blade 1, the fourth surface 7 is connected with the connecting part 32, and the third surface 6 and the fourth surface 7 are connected with the chip discharge groove 50; a back angle is formed between the third surface 6 and the blade 1, and an inward-inclined dish-shaped angle is formed between the third surface and the fourth surface.

During cutting, the third surface 6 can avoid the interference between the second surface 3 and the workpiece, and is matched with the inward-folded fourth surface 7 to form a larger waste chip discharge area at the bottom end part of the cutting part 31, so that waste chips can be conveniently collected into the area from each waste chip groove 50 and can be discharged from the connecting part 32 and the side of the cutter neck 20.

As a preferred embodiment of the present invention, as shown in fig. 4 and 5, the radial margin inclination angle g of the margin 1 is between 10 ° and 15 °, and the axial margin inclination angle h is between-1 ° and 1 °; the first radial inclination angle c of the first cutting edge 4 is between 7 ° and 9 °, and the first axial inclination angle d thereof is between-35 ° and-37 °; the second radial inclination e of the second cutting edge 5 is between 23 ° and 27 °, and the second axial inclination f thereof is between-2 ° and 2 °; a third radial inclination of the relief angle is comprised between 18 ° and 22 °, and a third axial inclination thereof is comprised between-2 ° and 2 °; the dish angle is an inward angle of less than 3 °.

The multi-tooth left-handed cutting blade is arranged on the multi-tooth left-handed cutting blade, so that the cutting efficiency is improved, the precision and the smoothness of a cutting surface are improved, and the multi-tooth left-handed cutting blade can be used for cutting and molding the surfaces of various high-precision products; through setting up in chip groove, third face and the fourth face that the chip groove meets, can enlarge the accommodation area of sweeps on the tool bit, the sweeps of being convenient for is discharged from the tool bit fast, avoids the sweeps to pile up the temperature rise that leads to too fast, each cutting edge on the protection cutter to avoid the sweeps fish tail work piece surface.

The technical scope of the present invention is not limited to the above embodiments, and any modifications, equivalent variations and modifications made to the above embodiments according to the technical spirit of the present invention still fall within the technical scope of the present invention.

Claims (6)

1. A left-handed T-shaped knife is characterized by comprising a knife handle, a knife neck and a T-shaped knife head which are coaxial; the cutter head comprises a cutting part and a connecting part which are coaxial, the connecting part is connected with the cutter neck, and six forming blades are spirally wound on the cutting part at equal intervals in a left-hand rotation manner; chip grooves are formed between every two forming blades, and one end part of each chip groove extends to the connecting part; six the shaping sword with the chip groove is in jointly the tip of tool bit all forms an end tooth, the central height of end tooth is less than the height of its lateral wall.

2. A left-hand T-shaped cutter according to claim 1, wherein the cutting portion is frustum-shaped with a taper angle of between 38 ° and 42 °.

3. A left-hand T-shaped cutter as claimed in claim 1, wherein the helix angle of each forming edge is the same, and the helix angle is between 33 ° and 37 °.

4. A left-hand T-shaped cutter as claimed in claim 1, wherein the center of said end tooth is formed with a chip flute communicating with each of said chip flutes.

5. A left-hand T-knife according to any of claims 1 to 4, wherein each forming edge is formed with an inclined land, the lands being formed on either side with first and second faces; a first cutting edge is formed between the first surface and the land, and a second cutting edge is formed between the second surface and the land.

6. A left-hand T-shaped cutter according to claim 5, wherein a third surface and a fourth surface which are inclined and connected are formed on the rear end surface of each forming edge, the third surface is connected with the blade band, the fourth surface is connected with the connecting part, and the third surface and the fourth surface are connected with the chip discharge groove; and a rear angle is formed between the third surface and the blade band, and an inward-inclined dish-shaped angle is formed between the third surface and the fourth surface.

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