CN112974941A - Composite forming milling cutter - Google Patents

Abstract

The invention provides a composite formed milling cutter, which comprises a cutter body and a cutter head positioned at the end part of the cutter body, and also comprises: the drilling and milling cutter parts are arranged in various numbers, and are sequentially formed on the peripheral surface of the cutter head along the axial direction of the cutter head; each drilling and milling cutter part comprises at least two cutting edges spirally distributed along the axial direction of the cutter head, and the cutting edges of the adjacent drilling and milling cutter parts are in one-to-one correspondence and are connected at the end parts; moreover, each drilling and milling cutter part, each cutter head and each cutter body are coaxially arranged; and on the axial section of the cutter body, the drilling and milling cutter part which is positioned at the end part of the cutter head far away from the cutter body is arranged in an isosceles trapezoid shape. The multiple drilling and milling cutter parts are integrated, so that only one-time feeding is needed in the multiple drilling and milling technological processes, and holes with different diameters and shapes can be machined and applied on the same axis. Compared with the use of a single special cutter, the cutter changing device not only reduces repeated cutter changing, but also reduces the drilling and milling processing time and greatly improves the processing efficiency.

Description

Composite forming milling cutter

Technical Field

The invention relates to the technical field of machining cutters, in particular to a composite forming milling cutter.

Background

Some mechanical parts have holes with different diameter and shape requirements in the axial direction, for example, the end direction is a tapered hole, the step hole is a round hole, and the hole edge has a chamfer requirement, the general machining method is as follows: the taper hole is milled to be in the shape on a numerical control machine tool by using a ball end milling cutter or is formed in one step by ordering the taper milling cutter, then a standard specification milling cutter which is a little smaller than the required size is used for milling to be in the required size or is formed in one step by ordering a cutter in the size, and moreover, the chamfer is formed in one step by using a small chamfer cutter or a slightly larger chamfer cutter. The use of standard specification cutters requires multiple cutter changing for multiple round winding and deep milling processing, and the machining time is too long. Even if the formed milling cutter is manufactured, the milling cutter needs to be changed for many times to perform drilling and milling processing for many times.

Disclosure of Invention

In order to solve the above problems, the present invention provides a composite-formed milling cutter, which overcomes the above technical problems.

In order to achieve the above object, the present application provides a composite milling cutter, including cutter body and the tool bit that is located the cutter body tip, still include: the drilling and milling cutter parts are arranged in various numbers, and are sequentially formed on the peripheral surface of the cutter head along the axial direction of the cutter head; each drilling and milling cutter part comprises at least two cutting edges spirally distributed along the axial direction of the cutter head, the cutting edges of the adjacent drilling and milling cutter parts are in one-to-one correspondence and are connected at the end parts, and the connecting parts of the cutting edges of the adjacent drilling and milling cutter parts are arranged in an arc shape; moreover, each drilling and milling cutter part, each cutter head and each cutter body are coaxially arranged; and on the axial section of the cutter body, the drilling and milling cutter part which is positioned at the end part of the cutter head far away from the cutter body is arranged in an isosceles trapezoid shape.

Optionally, the drilling and milling cutter portion at least includes one or more of the following cutter portions distributed in sequence along the tool bit axis towards the cutter body: the conical drilling and milling cutter part is used for drilling and milling a conical hole on a workpiece; the circular diameter drilling and milling cutter part is used for milling a circular diameter hole of a workpiece; the port chamfering cutter part is used for chamfering and deburring a workpiece; and the conical drilling and milling cutter part, the circular diameter drilling and milling cutter part and the port chamfering cutter part are sequentially connected, and the end part of the port chamfering cutter part, which is far away from the conical drilling and milling cutter part, is abutted against the cutter body.

Optionally, in a longitudinal projection plane perpendicular to the axis of the cutter body, the diameters of the tapered drilling and milling cutter portion, the circular diameter drilling and milling cutter portion, and the port chamfer cutter portion are sequentially increased, and the diameter of the port chamfer cutter portion is equal to the diameter of the cutter body.

Optionally, the length of the conical drilling and milling cutter part in the axial direction of the cutter body is (14 ± 0.1) mm; the diameter of the conical drilling and milling cutter part in a longitudinal projection plane perpendicular to the axis of the cutter body is (8 +/-0.075) mm;

and/or the length of the circular diameter drilling and milling cutter part in the axial direction of the cutter body is (6.2 +/-0.05) mm; the diameter of the circular diameter drilling and milling cutter part in a longitudinal projection plane perpendicular to the axis of the cutter body is (10.5 +/-0.008) mm.

Optionally, the length of the cutter head in the axial direction of the cutter body is (22.5 ± 0.05) mm.

Optionally, the diameter of the cutter body in a longitudinal projection plane perpendicular to the cutter body axis is (12 ± 0.008) mm, and the lengths of the cutter body and the cutter head in the cutter body axial direction are 70 mm.

Optionally, the tool bit is made of tungsten-cobalt hard alloy with a grade of YG8 type A114; the cutter body is made of 9SiCr high-carbon alloy tool steel.

Optionally, the surface of the conical drilling and milling cutter part, the surface of the circular diameter drilling and milling cutter part and the surface of the port chamfer cutter part are coated with chromium silicide nitride wear-resistant coatings.

Optionally, each of the drilling and milling cutter parts comprises at least two cutting edges spirally staggered along the axial direction of the cutter head.

Optionally, each of the milling and drilling sections includes at least two cutting edges spirally distributed along the axial direction of the cutter head, and the cutting edges of each of the milling and drilling sections have the same spiral direction.

By the composite forming milling cutter, various drilling and milling cutter parts are integrated, so that a plurality of drilling and milling technological processes only need one-time feeding, and holes with different diameters can be machined and applied on the same axis. Compared with the use of a single special cutter, the cutter changing device not only reduces repeated cutter changing, but also reduces the drilling and milling processing time and greatly improves the processing efficiency.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.

In the drawings:

FIG. 1 is a schematic structural view of a composite milling cutter according to the present invention;

fig. 2 is a schematic view of a composite milling cutter according to the present invention for machining a workpiece.

In the figure, 1, a cutter body; 2. a cutter head; 21. a conical drilling and milling cutter part; 22. a circular diameter drilling and milling cutter part; 23. A port chamfer cutter portion; 24. a blade.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In order to facilitate an understanding of the embodiments of the present invention, the structure of the present invention will be described in detail with reference to several specific embodiments.

FIG. 1 is a schematic structural view of a composite milling cutter according to the present invention; fig. 2 is a schematic view of a composite milling cutter according to the present invention for machining a workpiece.

According to fig. 1 and 2, a first embodiment of the present invention provides a composite milling cutter, which includes a cutter body 1 and a cutter head 2 located at an end of the cutter body 1, and further includes: the drilling and milling cutter parts are arranged in various numbers, and are sequentially formed on the peripheral surface of the cutter head 2 along the axial direction of the cutter head 2; each drilling and milling cutter part comprises at least two cutting edges 24 spirally distributed along the axial direction of the cutter head 2, the cutting edges 24 of the adjacent drilling and milling cutter parts are in one-to-one correspondence and are connected at the end parts, and the joints of the cutting edges 24 of the adjacent drilling and milling cutter parts are arranged in an arc shape; moreover, each of the drilling and milling cutter part, the cutter head 2 and the cutter body 1 are coaxially arranged; and, on the axial cross section of the cutter body 1, the drilling and milling cutter part which is positioned at the end part of the cutter head 2 far away from the cutter body 1 is arranged in an isosceles trapezoid shape.

In this way, by integrating various drilling and milling cutter parts, only one time of feeding is needed in a plurality of drilling and milling technological processes, and the original multiple machining processes are shortened into one process. Moreover, the machining application of holes with different diameter shapes can be made on the same axis. Compared with the use of a single special cutter, the cutter changing device not only reduces repeated cutter changing, but also reduces the drilling and milling processing time and greatly improves the processing efficiency.

Specifically, according to fig. 1 and 2, a first embodiment of the present invention provides a composite milling cutter, which includes a cutter body 1 and a cutter head 2 located at an end of the cutter body 1, wherein the cutter head 2 is further provided with a plurality of drilling and milling cutter portions, such as two or more drilling and milling cutter portions.

In another embodiment, the cutter body 1, the cutter head 2 and the drilling and milling cutter part are integrally formed.

It is noted that the drilling and milling cutter portions referred to in this application are each adapted to a corresponding machining process. Moreover, the composite forming milling cutter is suitable for processing and applying holes with different diameters on the same axis.

For these different types of drilling and milling cutter portions, they are sequentially formed on the outer peripheral surface of the cutter head 2 along the axial direction of the cutter head 2; moreover, every it all includes two at least edges that follow to bore milling cutter portion the cutting edge 24 of the axial spiral distribution of tool bit 2, and is adjacent the cutting edge 24 one-to-one and the end connection of drilling milling cutter portion, moreover, it is adjacent the cutting edge 24 junction of drilling milling cutter portion is the arc setting, just so can make cutting edge 24 have better circumference continuity, more is favorable to at the cutting in-process homodisperse stress.

Moreover, each of the drilling and milling cutter part, the cutter head 2 and the cutter body 1 are coaxially arranged; and, on the axial cross section of the cutter body 1, the drilling and milling cutter part which is positioned at the end part of the cutter head 2 far away from the cutter body 1 is arranged in an isosceles trapezoid shape.

Such as: the above-described drilling and milling cutter portion provided on the tool head 2 may be provided in the following exemplary configurations:

the drill-mill section comprises at least one or more of: a cone drill and mill section 21, a round diameter drill and mill section 22, and a port chamfer section 23.

The cutting edges 24 of the tapered drilling and milling cutter part 21, the cutting edges 24 of the circular diameter drilling and milling cutter part 22 and the cutting edges 24 of the port chamfering cutter part 23 correspond one to one, and the tail end of the cutting edge 24 of the tapered drilling and milling cutter part 21 is connected with the front end of the cutting edge 24 of the circular diameter drilling and milling cutter part 22, and the tail end of the cutting edge 24 of the circular diameter drilling and milling cutter part 22 is connected with the front end of the cutting edge 24 of the port chamfering cutter part 23.

In another embodiment, the taper drilling and milling cutter part 21 is used for performing a taper hole drilling and milling process on a workpiece; the circular diameter drilling and milling cutter part 22 is used for performing circular diameter hole milling treatment on a workpiece; this port chamfer sword portion 23 is used for carrying out the chamfer to burring to the work piece, like: a rounded or chamfered corner; the tapered drilling and milling cutter portion 21, the circular diameter drilling and milling cutter portion 22, and the port chamfer cutter portion 23 are connected in sequence, and the end portion of the port chamfer cutter portion 23 away from the tapered drilling and milling cutter portion 21 abuts against the cutter body 1.

In another embodiment, the tool bit 2 is made of tungsten-cobalt cemented carbide with a grade of YG8 type A114; and/or the cutter body 1 is made of 9Si Cr high-carbon alloy tool steel.

In another embodiment, the surfaces of the cone drill and mill section 21, the round diameter drill and mill section 22, and the port chamfer section 23 are coated with a chromium nitride siliconized wear resistant coating.

The surface of the conical drilling and milling cutter part 21, the surface of the circular diameter drilling and milling cutter part 22 and the surface of the port chamfering cutter part 23 are coated with aluminum oxide hard wear-resistant coatings, so that the wear of a cutter can be effectively reduced, the service life of the cutter is prolonged, and the hardness, the wear resistance and the heat resistance of the drilling and milling cutter part are improved.

In another embodiment, each of the milling and drilling sections comprises at least two cutting edges 24 helically staggered in the axial direction of the cutting head 2. Of course, the following settings may also be made: each of the milling and drilling sections comprises at least two cutting edges 24 spirally arranged in the axial direction of the cutting head 2, and the cutting edges 24 of each milling and drilling section have the same spiral direction. Moreover, in the present embodiment, whether the helix angles of the cutting edges 24 of each drilling and milling cutter part are the same or not is not limited, such as: the helical angles of the adjacent drilling and milling cutter parts are the same and are all 30 degrees; of course, the helical angles of the drilling and milling cutter parts on both sides of any drilling and milling cutter part can be the same; or the helix angle of each drilling and milling cutter part is different.

In another embodiment, the diameters of the cone milling cutter portion 21, the circular diameter milling cutter portion 22 and the port chamfer cutter portion 23 sequentially increase in a longitudinal projection plane perpendicular to the axis of the cutter body 1, and the diameter of the port chamfer cutter portion 23 in the longitudinal projection plane perpendicular to the axis of the cutter body 1 is equal to the diameter of the cutter body 1.

In another embodiment, the length of the conical drilling and milling cutter part 21 in the axial direction of the cutter body 1 is (14 ± 0.1) mm; the diameter of the conical drilling and milling cutter part 21 in a longitudinal projection plane perpendicular to the axis of the cutter body 1 is (8 +/-0.075) mm;

and/or the length of the circular diameter drilling and milling cutter part 22 in the axial direction of the cutter body 1 is (6.2 +/-0.05) mm; the diameter of the circular diameter drilling and milling cutter part 22 in a longitudinal projection plane perpendicular to the axis of the cutter body 1 is (10.5 +/-0.008) mm.

The length of the cutter head 2 in the axial direction of the cutter body 1 is (22.5 +/-0.05) mm.

The diameter of the cutter body 1 in a longitudinal projection plane perpendicular to the axis of the cutter body 1 is (12 +/-0.008) mm, and the lengths of the cutter body 1 and the cutter head 2 in the axial direction of the cutter body 1 are 70 mm.

In another embodiment, the present invention provides a special composite milling cutter for machining, so that holes with different diameter shapes required to be made on the same axis by some mechanical parts can be machined by one feed, and the milling cutter comprises a conical drilling and milling cutter part 21, a circular diameter drilling and milling cutter part 22 and a port chamfering cutter part 23.

When a workpiece blank is cut, the composite forming milling cutter firstly participates in drilling and milling a workpiece by the conical drilling and milling cutter part 21 with a smaller diameter so as to remove a part of materials, then drills port round workpiece materials through the round diameter drilling and milling cutter part 22, and then carries out hole edge chamfering and deburring by the port chamfering cutter part 23 (which can be made into a right angle or a round angle) at the rear end. The process can be simultaneously completed by only once feeding in a plurality of working procedures such as drilling and milling of a taper hole, milling of a circular diameter hole, chamfering and deburring. Compared with the use of a single special cutter, the cutter changing is repeated, the drilling and milling processing time is saved, and the processing efficiency is greatly improved.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred 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 (10)

1. The utility model provides a compound shaping milling cutter, includes cutter body (1) and is located cutter head (2) of cutter body (1) tip, its characterized in that still includes:

the drilling and milling cutter parts are arranged in various numbers, and are sequentially formed on the peripheral surface of the cutter head (2) along the axial direction of the cutter head (2);

each drilling and milling cutter part comprises at least two cutting edges (24) spirally distributed along the axial direction of the cutter head (2), the cutting edges (24) of the adjacent drilling and milling cutter parts are in one-to-one correspondence and are connected at the end parts, and the connection parts of the cutting edges (24) of the adjacent drilling and milling cutter parts are arranged in an arc shape; in addition, each drilling and milling cutter part, the cutter head (2) and the cutter body (1) are coaxially arranged; and on the axial section of the cutter body (1), the drilling and milling cutter part which is positioned at the end part of the cutter head (2) far away from the cutter body (1) is arranged in an isosceles trapezoid shape.

2. The composite form milling cutter according to claim 1, wherein the drilling and milling cutter portion comprises at least one or more of:

the conical drilling and milling cutter part (21) is used for drilling and milling a conical hole on a workpiece;

a circular diameter drilling and milling cutter part (22) for performing circular diameter hole milling processing on a workpiece;

a port chamfer cutter part (23) for chamfering and deburring a workpiece;

moreover, the conical drilling and milling cutter part (21), the circular diameter drilling and milling cutter part (22) and the port chamfering cutter part (23) are sequentially connected, and the end part, far away from the conical drilling and milling cutter part (21), of the port chamfering cutter part (23) is abutted to the cutter body (1).

3. The milling cutter according to claim 2, wherein the diameters of the conical drilling and milling cutter portion (21), the circular diameter drilling and milling cutter portion (22), and the port chamfer cutter portion (23) increase in order in a longitudinal projection plane perpendicular to the axis of the cutter body (1), and the diameter of the port chamfer cutter portion (23) is equal to the diameter of the cutter body (1).

4. The composite milling cutter as defined in claim 3,

the length of the conical drilling and milling cutter part (21) in the axial direction of the cutter body (1) is (14 +/-0.1) mm; the diameter of the conical drilling and milling cutter part (21) in a longitudinal projection plane perpendicular to the axis of the cutter body (1) is (8 +/-0.075) mm;

and/or the length of the round diameter drilling and milling cutter part (22) in the axial direction of the cutter body (1) is (6.2 +/-0.05) mm; the diameter of the circular diameter drilling and milling cutter part (22) in a longitudinal projection plane perpendicular to the axis of the cutter body (1) is (10.5 +/-0.008) mm.

5. The milling cutter according to claim 4, wherein the length of the cutting head (2) in the axial direction of the cutter body (1) is (22.5 ± 0.05) mm.

6. The milling cutter according to claim 4, wherein the diameter of the cutter body (1) in a longitudinal projection plane perpendicular to the axis of the cutter body (1) is (12 ± 0.008) mm, and the length of the cutter body (1) and the cutter head (2) in the axial direction of the cutter body (1) is 70 mm.

7. The milling cutter according to claim 2, wherein the cutting head (2) is made of tungsten-cobalt cemented carbide of type YG8 type A114; the cutter body (1) is made of 9SiCr high-carbon alloy tool steel.

8. The milling cutter according to claim 2, wherein the surface of the conical drilling and milling cutter portion (21), the surface of the circular diameter drilling and milling cutter portion (22) and the surface of the port chamfer cutter portion (23) are coated with a chromium nitride siliconized wear resistant coating.

9. The composite profile milling cutter according to claim 1, wherein each of the drilling and milling cutter portions comprises at least two cutting edges (24) helically staggered in the axial direction of the cutting head (2).

10. The composite profile milling cutter according to claim 1, wherein each of the drilling and milling cutter parts comprises at least two cutting edges (24) helically distributed in the axial direction of the cutting head (2), and wherein the helical direction of the cutting edges (24) of each of the drilling and milling cutter parts is the same.

Images