CN217492821U - Step type forming milling cutter and numerical control equipment - Google Patents

Abstract

The utility model belongs to the technical field of numerical control equipment, in particular to a step-shaped forming milling cutter and numerical control equipment, the step-shaped forming milling cutter comprises a cutter handle and a cutter head, the cutter head is coaxially connected with the cutter handle, a first-stage cutter head, a second-stage cutter head and a third-stage cutter head with gradually reduced diameters are sequentially arranged in the direction of the cutter head back to the cutter handle, the side parts of the first-stage cutter head, the second-stage cutter head and the third-stage cutter head are spirally provided with cutting edges, adjacent cutting edges form chip grooves, the end part of the third-level tool bit is provided with a chip removing groove communicated with the chip removing groove, the end surfaces of the first-level tool bit, the second-level tool bit and the third-level tool bit are all vertical to the axis, because the end surfaces of the primary cutter head, the secondary cutter head and the tertiary cutter head are all vertical to the axis, the machined end surfaces of the secondary groove and the tertiary groove are ensured to be in a horizontal structure, and the machined levelness is ensured.

Description

Step type forming milling cutter and numerical control equipment

Technical Field

The utility model belongs to the technical field of numerical control equipment, especially, relate to a step shaping milling cutter and numerical control equipment.

Background

The milling cutter is used for milling and processing and has one or more rotary cutters of cutter teeth, each cutter tooth cuts off the surplus of the work piece intermittently in turn while working, the milling cutter is mainly used for processing planes, steps, grooves, forming surfaces, broken work pieces and the like on the milling machine, the milling cutter is a common tool in the field of mechanical production and processing, in the prior art, when processing step grooves on the work piece, people often adopt more than two milling cutters with different diameters to finish the step grooves, the cutter needs to be changed continuously in the processing process, the milling cutter with the smaller diameter is used for processing the primary groove, and the milling cutter with the larger diameter is used for processing the secondary groove and the tertiary groove; therefore, the cutter needs to be corrected and centered every time when being replaced, so that the machining efficiency is low, and the machining difficulty and the precision of the transition positions of different machining surfaces are large and difficult to guarantee.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a step shaping milling cutter and numerical control equipment need frequently to change milling cutter when aiming at solving the processing step groove among the prior art and leads to the technical problem that machining precision is low.

For realizing the above purpose, the embodiment of the utility model provides a pair of step type shaping milling cutter, including handle of a knife and tool bit, the tool bit with handle of a knife coaxial coupling, the tool bit dorsad the handle of a knife direction sets up degressive one-level tool bit of diameter, second grade tool bit and tertiary tool bit in order, the one-level tool bit the second grade tool bit with the cutting edge has been arranged to the equal spiral of lateral part of tertiary tool bit, and is adjacent the cutting edge forms the chip groove, the tip of tertiary tool bit be provided with the chip groove of chip groove intercommunication, the one-level tool bit the second grade tool bit with the terminal surface of tertiary tool bit all is perpendicular with the axis.

Optionally, the helix angle of the blade is 35-40 degrees.

Optionally, the helix angle of the blade is 38 degrees.

Optionally, the inner surface of the flute is arc-shaped.

Optionally, the width of the chip groove is of a gradual structure.

Optionally, the diameter of the shank decreases gradually in the direction of the cutting head, so that a bevel is formed between the cutting head and the shank.

Optionally, the surfaces of the primary cutter head, the secondary cutter head and the tertiary cutter head are provided with wear-resistant coatings.

Optionally, the wear-resistant coating is made of a nitrogen-containing titanium silicide hard material.

Optionally, the number of the cutting edges is two.

The embodiment of the utility model provides an above-mentioned one or more technical scheme in the step shaping milling cutter have one of following technological effect at least: when the milling cutter is used, the stepped forming milling cutter is installed on equipment, when the milling cutter works, the equipment drives the stepped forming milling cutter to rotate and process a workpiece, the third-level cutter head firstly processes a first-level groove on the workpiece, then the second-level cutter head processes a second-level groove on the first-level groove, and finally the last-level cutter head processes a third-level groove on the second-level groove, so that the stepped groove is processed at one time, the cutter does not need to be replaced, the processing accuracy is ensured, and the end faces of the first-level cutter head, the second-level cutter head and the third-level cutter head are perpendicular to the axis, so that the processed second-level groove and the end face of the third-level groove are of a horizontal structure, and the processing levelness is ensured.

The utility model also provides a numerical control equipment, included foretell step type shaping milling cutter.

The embodiment of the utility model provides an above-mentioned one or more technical scheme in the numerical control equipment have one of following technological effect at least: the step-type forming milling cutter is adopted, when the step-type forming milling cutter is used, the step-type forming milling cutter is installed on equipment, when the step-type forming milling cutter works, the equipment drives the step-type forming milling cutter to rotate and process a workpiece, a first-stage groove is processed on the workpiece by a third-stage cutter head, a second-stage groove is processed on the first-stage groove by the second-stage cutter head, and a third-stage groove is processed by the last-stage cutter head on the second-stage groove, so that the step-type groove is processed at one time, the cutter does not need to be replaced, the processing accuracy is ensured, and the end faces of the first-stage cutter head, the second-stage cutter head and the third-stage cutter head are perpendicular to the axis, so that the processed second-stage groove and the end face of the third-stage groove are in a horizontal structure, and the processing levelness is ensured.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following descriptions are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.

Fig. 1 is a schematic structural view of a step-type formed milling cutter provided by an embodiment of the present invention.

Wherein, in the figures, the respective reference numerals:

10-handle of a knife 20-tool bit 21-first-level tool bit

22-second-level tool bit 23-third-level tool bit 24-blade

25-chip groove 26-chip groove 30-bevel.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary and intended to explain the embodiments of the present invention and are not to be construed as limiting the present invention.

In the description of the embodiments of the present invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which is only for convenience in describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element so indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.

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 embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.

In an embodiment of the utility model, as shown in fig. 1, provide a step-type shaping milling cutter, including handle of a knife 10 and tool bit 20, tool bit 20 with handle of a knife 10 coaxial coupling, tool bit 20 dorsad handle of a knife 10 direction sets up degressive one-level tool bit 21 of diameter, second grade tool bit 22 and tertiary tool bit 23 in proper order, one-level tool bit 21 second grade tool bit 22 with the equal spiral arrangement of lateral part of tertiary tool bit 23 has cutting edge 24, and is adjacent cutting edge 24 forms chip groove 25, the tip of tertiary tool bit 20 be provided with chip groove 26 of chip groove 25 intercommunication, one-level tool bit 21 second grade tool bit 22 with the terminal surface of tertiary tool bit 23 all is perpendicular with the axis.

Specifically, when the milling cutter is used, the stepped forming milling cutter is installed on equipment, when the milling cutter works, the equipment drives the stepped forming milling cutter to rotate and process a workpiece, the third-level tool bit 23 firstly processes a first-level groove on the workpiece, then the second-level tool bit 22 processes a second-level groove on the first-level groove, and finally the first-level tool bit 21 processes a third-level groove on the second-level groove, so that the stepped groove is processed at one time, tools do not need to be replaced, the processing accuracy is ensured, and the end faces of the first-level tool bit 21, the second-level tool bit 22 and the third-level tool bit 23 are perpendicular to the axis, so that the processed second-level groove and the end face of the third-level groove are in a horizontal structure, and the processing levelness is ensured.

In another embodiment of the present invention, the spiral angle of the cutting edge 24 is 35 to 40 degrees, and preferably, the spiral angle of the cutting edge 24 is 38 degrees. Specifically, the helix angle of the blade 24 is set to 38 degrees, which ensures stability of processing and also ensures strength of the blade 24.

In another embodiment of the present invention, the number of the cutting edges 24 is two, specifically, the two cutting edges 24 can satisfy the requirement of processing and can also reduce the difficulty of production.

In another embodiment of the present invention, the inner surface of the chip groove 25 is arc-shaped. In this manner, the debris is facilitated to be discharged along the junk slots 25.

In another embodiment of the present invention, the width of the chip discharging groove 25 is a gradually changing structure, so that the chip blocking is placed in the chip discharging groove 25, thereby ensuring the working stability.

In another embodiment of the present invention, the diameter of the tool holder 10 is gradually decreased along the direction of the tool bit 20, so that an inclined plane 30 is formed between the tool bit 20 and the tool holder 10, and when the chips move to the inclined plane 30 along the chip groove 25, the chips are discharged under the guide of the inclined plane 30, thereby preventing the chips from moving continuously toward the tool holder 10, and ensuring the stability of the processing.

In another embodiment of the present invention, the inclination of the inclined plane 30 is 40 to 50 degrees, and preferably, the inclined plane 30 is 45 degrees. This ensures the stability of the connection while guiding the movement of debris.

In another embodiment of the present invention, the surfaces of the first-stage cutter head 21, the second-stage cutter head 22 and the third-stage cutter head 23 are all provided with wear-resistant coatings. In particular, the provision of a wear resistant coating can improve the service life.

In another embodiment of the present invention, the wear resistant coating is made of a hard material of titanium silicon nitride. Specifically, the hardness of the titanium silicide nitride hard material is high, thereby increasing the useful life of milling head 20.

The utility model also provides a numerical control equipment, included foretell step type shaping milling cutter.

Specifically, because the stepped forming milling cutter is adopted, when the stepped forming milling cutter is used, the stepped forming milling cutter is firstly installed on equipment, when the stepped forming milling cutter works, the equipment drives the stepped forming milling cutter to rotate and process a workpiece, the third-level cutter head 23 firstly processes a first-level groove on the workpiece, then the second-level cutter head 22 processes a second-level groove on the first-level groove, and the last-level cutter head 21 processes a third-level groove on the second-level groove, so that the stepped groove is processed at one time, the cutter does not need to be replaced, the processing accuracy is ensured, and the end surfaces of the first-level cutter head 21, the second-level cutter head 22 and the third-level cutter head 23 are vertical to the axis, so that the end surfaces of the processed second-level groove and the processed third-level groove are ensured to be in a horizontal structure, and the processing levelness is ensured.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. The utility model provides a step-type shaping milling cutter, its characterized in that, including handle of a knife and tool bit, the tool bit with handle of a knife coaxial coupling, the tool bit dorsad the handle of a knife direction sets up degressive one-level tool bit of diameter, second grade tool bit and tertiary tool bit in proper order, the one-level tool bit the second grade tool bit with the equal spiral of lateral part of tertiary tool bit has arranged the cutting edge, and is adjacent the cutting edge forms the chip groove, the tip of tertiary tool bit be provided with the chip groove of chip groove intercommunication, the one-level tool bit the second grade tool bit with the terminal surface of tertiary tool bit all is perpendicular with the axis.

2. The step milling cutter according to claim 1, wherein the helix angle of the cutting edge is 35 to 40 degrees.

3. A step mill according to claim 2, wherein the helix angle of the cutting edge is 38 degrees.

4. A step mill according to any one of claims 1 to 3, wherein an inner surface of the chip groove is arc-shaped.

5. A step milling cutter according to any one of claims 1 to 3 wherein the width of the flutes is of a tapered configuration.

6. A step milling cutter according to any one of claims 1 to 3, wherein the diameter of the shank decreases gradually in the direction of the cutting head so that a chamfer is formed between the cutting head and the shank.

7. A step milling cutter according to any one of claims 1 to 3, wherein the surfaces of the primary, secondary and tertiary cutting inserts are provided with a wear resistant coating.

8. The stepped milling cutter according to claim 7, wherein the wear resistant coating is a titanium nitride silicide hard material.

9. A step milling cutter according to any one of claims 1 to 3, wherein the number of the cutting edges is two.

10. A numerical control apparatus comprising a step mill according to any one of claims 1 to 9.

Images