CN211842420U - Chamfer forming cutter - Google Patents

Abstract

The utility model discloses a chamfering forming cutter, comprising a cutter head, a cutting portion is arranged on the cutter head, the cutting portion comprises a bottom edge and a cutting edge portion, and the cutting edge portion comprises a cutting edge and a cutting groove, The cutting groove is a helical groove in the circumferential direction of the cutting edge, and the cutting edge is a vertebral body with a gradually increasing outer diameter formed by connecting a plurality of curved surfaces with the bottom edge as the starting point. The plane formed by the linear revolution and the surface formed by the curved revolution. The cutting edge adopts multi-segment curved surfaces to form an entity with a certain taper. Due to the unique design of the cutting edge shape, it can directly form more complex curved surfaces, which greatly shortens the time of the material to be processed, and ensures that the surface of the cut wood is smooth and free from damage. Barb.

Description

A chamfering forming knife

technical field

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

Background technique

The patterns or patterns used for decoration on wooden furniture are mostly formed by complex curved surfaces composed of straight lines, curves or arcs. Most tools have no forming effect. When engraving such patterns or patterns on the machine tool, it is necessary to change the tool back and forth to form the shape. desired pattern or pattern. For example, the Chinese patent application number is 2018200580176, and the name is "a kind of chamfering knife", which discloses a chamfering knife, which includes a cutter head, and the cutter head includes a cutter head and a cutting part. The top of the cutting part is provided with chamfering teeth. The corner teeth are provided with chamfers, and the chamfers are provided with a plurality of forming rear legs for realizing the chamfering and voiding. This publication can chamfer the workpiece and at the same time process the bottom surface of the workpiece, but because the cutting edge of the cutting part is a straight edge, it can only process a flat surface, and cannot process a complex curved surface composed of a flat surface, a curved surface, an arc or a straight line .

Utility model content

1. Technical problems to be solved by the utility model

The purpose of the utility model is to overcome the technical problem that the knives in the prior art cannot directly form complex curved surfaces, and provide a chamfering forming knife, which can directly form patterns or patterns on wooden furniture.

2. Technical solutions

In order to achieve the above purpose, the technical solution provided by the present utility model is as follows: a chamfering forming knife includes a cutter head, and a cutting portion is provided on the cutter head, and the cutting portion includes a bottom edge and a cutting edge portion, and the cutting edge The mouth part includes a cutting edge and a cutting groove, the cutting groove is a helical groove in the circumferential direction of the cutting edge part, and the cutting edge part is a cone with a gradually increasing outer diameter formed by connecting a plurality of curved surfaces with the bottom edge as the starting point. The multi-segment curved surface includes a plane formed by rectilinear revolving and a curved surface formed by curvilinear revolving.

As a further improvement of the present invention, the multi-segment curved surface includes a first curved surface, a second curved surface, a third curved surface and a fourth curved surface connected from bottom to top, the first curved surface and the third curved surface are rotated by a straight line The second curved surface and the fourth curved surface are formed by a curve revolving; relative to the tool centerline, the second curved surface is inwardly concave, and the fourth curved surface is outwardly convex.

As a further improvement of the present invention, the radius of the fourth curved surface is (0.1-2) mm.

As a further improvement of the present invention, the taper of the cutting edge portion is 87°.

As a further improvement of the present invention, the shearing angle of the cutting edge portion is 10°, and the central rake angle is 4°-6°.

As a further improvement of the present invention, the radial first relief angle of the cutting edge portion is 9°-11°, and the radial second relief angle of the chamfering forming knife is 20°-24°.

As a further improvement of the present invention, the axial first relief angle of the cutting edge portion is 7°-9°, and the axial second relief angle of the chamfering forming knife is 18°-22°.

As a further improvement of the present invention, the length of the chamfering forming knife is 50mm and the diameter is 4mm.

As a further improvement of the present invention, the material of the cutter head is tungsten steel.

As a further improvement of the present invention, the material of the cutter head is high-speed steel.

3. Beneficial effects

Compared with the prior art, the technical scheme provided by the present utility model has the following beneficial effects:

A chamfering forming knife of the utility model, the cutting edge part adopts multi-segment curved surfaces to connect to form an entity with a certain taper. Due to the unique design of the cutting edge shape, the cutting part of the knife can form the complex curved surface of wooden furniture, such as by The complex curved surface composed of straight lines, curves or arcs is convenient for milling and processing the patterns and patterns of wooden furniture. It does not need to change the tool back and forth for processing, and the processing accuracy and processing efficiency can be guaranteed.

Description of drawings

Fig. 1 is the structural representation of a kind of chamfering forming knife provided by the utility model;

Fig. 2 is the K-direction view of Fig. 1;

Fig. 3 is the schematic diagram of radial relief angle in Fig. 2;

Fig. 4 is the schematic diagram of axial relief angle in Fig. 2;

Description of the labels in the diagram:

1. Tool head; 2. Cutting part; 21. Bottom edge; 22. Cutting edge; 220, First curved surface; 221, Second curved surface; 222, Third curved surface; 223, Fourth curved surface; 23, Cutting groove;

a, radial first relief angle; b, radial second relief angle; c, central rake angle; d, axial first relief angle; e, axial second relief angle; f, shear angle.

Detailed ways

In order to further understand the content of the present utility model, the present utility model is described in detail with reference to the accompanying drawings and specific embodiments.

In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal" , "top", "bottom", "inside", "outside" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or It is implied that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation of the present invention.

In the description of the present utility model, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, exceeding, etc. are understood as not including this number, above, below, within, etc. are understood as including this number. If it is described that the first and the second are only for the purpose of distinguishing technical features, it cannot be understood as indicating or implying relative importance, or indicating the number of the indicated technical features or the order of the indicated technical features. relation.

In the description of the present invention, unless otherwise clearly defined, words such as setting, installation, connection should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution .

As shown in FIG. 1 , a chamfering forming knife includes a cutter head 1, a cutting part 2 is arranged on the cutter head, the cutter head 1 and the cutting part 2 are integrally formed, and the cutting part 2 includes a bottom edge 21 and a cutting edge part 22. The cutting edge The portion 22 includes a cutting edge and a cutting groove 23. The cutting groove 23 is a helical groove in the circumferential direction of the cutting edge portion 22. The cutting edge portion takes the bottom edge 21 as the starting point, and is composed of a plurality of curved surfaces connected accordingly. The outer diameter gradually increases. The multi-segment curved surface includes a plane composed of straight line rotation and a curved surface composed of curve rotation, so that the cutting part of the tool can form complex curved surfaces of wooden furniture, such as complex curved surfaces composed of straight lines, curves or arcs, which is convenient for milling and processing wood. The patterns and patterns of furniture do not need to be changed back and forth for processing, and the processing accuracy and processing efficiency can be guaranteed.

As a preferred embodiment of the present invention, it may also have the following additional technical features.

In this embodiment, the multi-segment curved surfaces include a first curved surface 220, a second curved surface 221, a third curved surface 222, and a fourth curved surface 223 that are connected from bottom to top. The second curved surface 221 and the fourth curved surface 223 are formed by a curve revolving. Relative to the tool centerline, the second curved surface 221 is inwardly concave, and the fourth curved surface is outwardly convex. The tool can mill out the plane on the workpiece through the first curved surface 220 and the third curved surface 222, and can mill out the corresponding convex and concave shapes on the workpiece through the second curved surface 221 and the fourth curved surface 223, which is convenient for molding wood furniture. There are flat and curved patterns or patterns. In practical applications, the second curved surface 221 can also be convex, the fourth curved surface 223 can also be concave, and the first curved surface 220 and the third curved surface 222 can also be curved surfaces, depending on the workpiece. The milling shape is not limited to this.

In this embodiment, the radius of the fourth curved surface 223 is (0.1-2) mm. Since the diameter of the tool is 4 mm, the radius of the fourth curved surface 223 is limited to be no more than 2 mm. According to the grooves of the patterns or patterns on the wooden furniture It is appropriate to control the radius of the fourth curved surface to be (0.1-2). Since different products require different machining grooves, the fourth curved surface can also be set separately according to the actual situation, and is not limited to this.

In this embodiment, the taper of the cutting edge portion 22 is 87°, and the taper may also be 60°, 90°, or the like.

In this embodiment, the shearing angle f of the cutting edge portion 22 is 10°, the central rake angle c is 4°-6°, the shearing angle f and the central rake angle c are used to adjust the sharpness of the cutting edge, and the shearing angle f According to the difference of the actual processed products, it is necessary to make adaptive adjustments. For stainless steel products, generally 3°-5° can be selected, and for plastic products, generally more than 10° can be selected. Since the processed product is wood, the nature is relatively soft, and it is required to be generally sharp. The shearing angle f is 10°, which can meet the general sharpness requirements. If the blade is too large, it will be easy to crack, and if the blade is too small, it will be blunt, which is not conducive to cutting. conduct. The center rake angle c is mainly used to adjust the sharpness of the bottom of the cutting edge. If it is too large, it is easy to chip. If it is too small, it is easy to increase the mechanical friction between the tool and the workpiece, resulting in damage to the surface of the tool. The central rake angle c of 4°-6° can ensure the sharpness of the cutting edge on the one hand, and on the other hand, reduce the mechanical friction between the tool and the workpiece and ensure the cutting ability.

In this embodiment, as shown in FIGS. 3 and 4 , the radial first relief angle a of the cutting edge portion 22 is 9°-11°, and the radial second relief angle b is 20°-24°. The axial first relief angle d is 7°-9°, and the axial second relief angle e is 18°-22°. The clearance angle of the tool is the angle between the clearance face and the cutting plane. The setting of the clearance angle directly affects the quality of the machined surface, tool durability and productivity. The function of the clearance angle is to reduce the clearance between the tool clearance face and the machined surface during cutting Friction, the rear angle should not be too large or too small. Increasing the relief angle can reduce friction, avoid the workpiece and improve the quality of the machined surface. However, when the relief angle is increased, the strength of the cutter head is low, and the heat dissipation volume is small. If the relief angle is too small, the workpiece cannot be avoided in time during processing, which affects The surface quality of machined parts increases tool wear. Therefore, the selection and quantity of the relief angles should be reasonably set according to the actual situation. In this embodiment, the setting numbers and angles of the radial relief angles and the axial relief angles take into account the above two aspects to a certain extent. Setting the clearance angle within the above range is based on the characteristics of the processed material and obtained through experiments. During processing, it can better avoid the workpiece and improve the surface quality of the workpiece. Multiple clearance angles can assist in discharging wood chips and reduce Small tool wear ensures that the surface of the milled wood is smooth and free of barbs.

In this embodiment, the length of the chamfering forming tool is 50mm and the diameter is 4mm. The diameter of the tool has a corresponding standard, which is generally determined according to the size, depth and processing material of the workpiece. Since the workpiece is wood, the diameter does not need to be too large. The diameter is about 4mm and the length is 50mm.

In this embodiment, the material of the cutter head 1 is tungsten steel. Tungsten steel has high hardness, good wear resistance, good strength and toughness, and excellent heat resistance and corrosion resistance. Grinding and other advantages.

In this embodiment, the material of the cutter head 1 can be high-speed steel, which can increase the strength of the cutter.

The present invention and its embodiments have been schematically described above, and the description is not restrictive, and what is shown in the accompanying drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it, without departing from the purpose of creation of the present invention, without creative design of the structure and embodiment similar to the technical solution, all should belong to the present invention. protected range.

Claims (10)

1. A chamfering forming knife, comprising a cutter head (1), the cutter head is provided with a cutting portion (2), and the cutting portion (2) comprises a bottom edge (21) and a cutting edge portion (22), The cutting edge portion (22) comprises a cutting edge and a cutting groove (23), the cutting groove (23) is a helical groove in the circumferential direction of the cutting edge portion (22), and is characterized in that: the cutting edge portion (22) The bottom edge (21) is used as the starting point, and the outer diameter is gradually increased to form a vertebral body formed by connecting multi-segment curved surfaces. 2 . The chamfering tool according to claim 1 , wherein the multi-segment curved surface comprises a first curved surface ( 220 ), a second curved surface ( 221 ), and a third curved surface connected from bottom to top. 3 . ( 222 ) and a fourth curved surface ( 223 ), the first curved surface ( 220 ) and the third curved surface ( 222 ) are formed by rectilinear revolving, and the second curved surface ( 221 ) and the fourth curved surface ( 223 ) are formed by curvilinear revolving ; Relative to the tool centerline, the second curved surface (221) is concave, and the fourth curved surface (223) is convex. 3 . The chamfering forming knife according to claim 2 , wherein the radius of the fourth curved surface ( 223 ) is (0.1-2) mm. 4 . 4 . The chamfering forming knife according to claim 1 , wherein the taper of the cutting edge portion ( 22 ) is 87°. 5 . 5 . The chamfering forming knife according to claim 1 , wherein the shearing angle (f) of the cutting edge portion is 10°, and the central rake angle (c) is 4°-6°. 6 . 6 . The chamfering forming knife according to claim 1 , wherein the radial first relief angle (a) of the cutting edge portion is 9°-11°, and the radial direction of the chamfering forming knife is 9°-11°. 7 . The second relief angle (b) is 20°-24°. 7. A chamfering forming knife according to claim 1, characterized in that: the axial first relief angle (d) of the cutting edge portion is 7°-9°, and the axis of the chamfering forming knife The second relief angle (e) is 18°-22°. 8 . The chamfering forming knife according to claim 1 , wherein the chamfering forming knife has a length of 50 mm and a diameter of 4 mm. 9 . 9 . The chamfering knife according to claim 1 , wherein the material of the knife head is tungsten steel. 10 . 10 . The chamfering forming knife according to claim 1 , wherein the material of the knife head is high-speed steel. 11 .

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