CN217192637U - Turning tool - Google Patents

Abstract

The utility model relates to a turning tool, including cutter body (1) and tool bit (2), tool bit (2) are kept away from the one end of cutter body (1) has front knife face (21) and back knife face (22), front knife face (21) with back knife face (22) meet the department and form convex cutting edge. The utility model discloses a cutter machining error is little, mends and corrects simply, can satisfy the machining precision requirement to optics field brittle material.

Description

Turning tool

Technical Field

The utility model relates to a turning cutter.

Background

With the development of automobiles, photoelectricity and other fields, ultra-precision machining technology is mature day by day, and the requirement of a high-precision arc-edge diamond turning tool is increasing day by day. In the prior art, hard and brittle materials are usually machined by using a negative rake angle tool, and most of the negative rake angle tools form a negative rake angle by grinding a rake face into an inclined plane, as shown in fig. 4 and 5. However, the cutting edge formed by such a rake face after the intersection with the flank face of the cylindrical or conical surface is elliptical. The negative rake angle of the cutter is different, and the error of the elliptical shape is different, so that the error of the edge surface shape in the machining process is larger, the correction is more complex, the compressive stress is uneven, and the appearance debugging is more difficult. Other turning tools with standard arc cutting edges mostly adopt a 0-degree front angle, namely, a front tool face is parallel to a horizontal plane, but the turning tools are only suitable for processing materials with soft materials, and the appearance of a processed workpiece is difficult to adjust due to the hard and brittle materials, the efficiency is low, the service life is short, and the processing requirement of an optical part is difficult to achieve.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a turning cutter.

In order to achieve the above object, the utility model provides a turning tool, including cutter body and tool bit, the tool bit is kept away from the one end of cutter body has rake face and back knife face, the rake face with back knife face meets and locates to form convex cutting edge.

According to an aspect of the present invention, the rake face and the flank face are conical faces.

According to an aspect of the utility model, the awl end of the rake face with the awl end of the back knife face meets and forms the cutting edge.

According to one aspect of the invention, the rake angle is 0 ° to-65 °.

According to an aspect of the invention, the relief angle is 5 ° to 20 °.

According to one aspect of the invention, the radius of the cutting edge is R0.05-R5.

According to an aspect of the utility model, the material of tool bit is single crystal diamond.

According to the utility model discloses a conceive, make the cutting edge of cutter form the convex of standard to possess the negative rake angle, thereby in work piece debugging such as big flare angle (big steepness), complex shape (like the lock face, fillet etc.), free-form surface, machining error is less, mends and corrects simply (exempts from to mend from even), can satisfy the market demand to the machining precision of optics field brittle material.

According to the utility model discloses a scheme through the inclination of reasonable rake face and the back knife face that sets up, can be so that the machining precision of cutter is higher, also can further make actual more simple with the compensation of theoretical machining route to the chip removal is comparatively easy, can not treat the machined part and cause wearing and tearing.

According to the utility model discloses a scheme, the single-point diamond is chooseed for use to the material of tool bit to make its hardness higher, and have wear-resisting, anti-crack characteristic, further be convenient for to brittle material's processing.

Drawings

Fig. 1 and 2 are block diagrams schematically showing two views of a turning tool according to an embodiment of the present invention, respectively;

fig. 3 schematically shows a machining schematic of a turning tool according to an embodiment of the invention;

fig. 4 and 5 are block diagrams schematically showing two views of a turning tool of the prior art, respectively;

fig. 6 shows a schematic front and rear angle diagram of a turning tool according to an embodiment of the present invention.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

In describing embodiments of the present invention, the terms "longitudinal," "lateral," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and other terms are used in an orientation or positional relationship shown in the associated drawings for convenience in describing the invention and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments, which are not repeated herein, but the present invention is not limited to the following embodiments.

Referring to fig. 1 and 2, the turning tool of the present invention includes a tool body 1 and a tool bit 2, wherein the tool bit 2 is fixed at one end of the tool body 1. The end of the cutting head 2 remote from the body 1 has a rake surface 21 and a flank surface 22. Wherein, the right end of the front tool face 21 and the rear tool face 22 is connected to form a circular arc-shaped cutting edge A. Therefore, the utility model discloses a cutter has possessed standard circular arc cutting edge, can directly adopt the radius compensation of cutter like this in the route of actual processing and the route compensation of theoretical processing to make to revive comparatively simply for oval blade, can avoid to revise even.

According to the utility model discloses an embodiment, rake face 21 and back knife face 22 are the conical surface, can make cutting edge A that two conical surface linking department formed like this can form the arc of standard in the space to the various drawbacks of the oval blade that the rake face formed that has avoided traditional to exist with the inclined plane form. And the conical bottom of the front tool face 21 is connected with the conical bottom of the rear tool face 22 to form a cutting edge A, so that the right end of the front tool face 21 is inclined downwards to form a negative angle smaller than 0 degree relative to the horizontal plane, the tool compressive stress is constant, chip removal is easy, the appearance debugging is simple, and the consistency is good.

According to an embodiment of the present invention, the rake angle (the angle between the rake face and the base) is 0 ° to-65 °, and the relief angle (the angle between the flank face and the cutting plane) is 5 ° to 20 °, as shown in fig. 6. Satisfying this setting, can making the machining precision of cutter higher, make the compensation of reality and theoretical machining route simpler to the chip removal is easy, can not treat the machined part and cause wearing and tearing.

According to an embodiment of the present invention, the radius of the cutting edge is R0.05-R5, and the error of the processing arc radian is 30nm-250 nm.

According to the utility model discloses an embodiment, tool bit 2's material is the single crystal diamond, so, makes its hardness higher, and has wear-resisting, anti-cracking characteristic to be favorable to the processing to brittle material.

Referring to fig. 3, when the ultra-precise turning tool set up as described above is used, the shape to be machined can be programmed by using an arc, a workpiece B to be machined is fixed on a precision machine tool, and the turning tool is mounted on a turning tool fixture. After the machine tool is started, the machine tool drives the workpiece B to be machined to perform high-speed rotation, and the set program can control the tool bit 22 to perform tangential motion with the workpiece B to be machined, so that turning is completed.

The above description is only an embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (6)

1. A turning tool comprises a tool body (1) and a tool bit (2), wherein one end, far away from the tool body (1), of the tool bit (2) is provided with a front tool face (21) and a rear tool face (22), and is characterized in that a circular arc-shaped cutting edge is formed at the joint of the front tool face (21) and the rear tool face (22);

the conical bottom of the front cutter surface (21) is connected with the conical bottom of the rear cutter surface (22) to form the cutting edge.

2. The turning tool according to claim 1, characterized in that the rake face (21) and the flank face (22) are conical faces.

3. The turning tool of claim 2 wherein the rake angle is 0 ° to-65 °.

4. The turning tool of claim 2 wherein the relief angle is 5 ° to 20 °.

5. The turning tool of claim 1 wherein the radius of the cutting edge is R0.05-R5.

6. The turning tool according to claim 1, characterized in that the material of the cutting head (2) is monocrystalline diamond.

Images