CN217223765U - Tool bit and tool comprising same - Google Patents

Abstract

The application provides a tool bit for milling process, including the circular shape cutter body with evenly encircle and locate a plurality of cutting parts on the cutter body, the cutting part is including the first blade, second blade and the third blade that connect gradually, first blade the second blade with the same rake face of third blade sharing. The cutting part still includes knife face behind first back knife face, the second and knife face behind the third, first blade is located the rake face with between the knife face behind the first, the second blade is located the rake face with between the knife face behind the second, the third blade is located the rake face with between the knife face behind the third. The tool bit that this application provided has machining precision height, machining efficiency height and the wide beneficial effect of range of processing. This application simultaneously proposes a cutter.

Description

Tool bit and tool comprising same

Technical Field

The application relates to the technical field of machining, especially relates to a tool bit and cutter including this tool bit.

Background

The milling machine is important equipment in machining, and the milling machine carries out milling processing on a workpiece by driving a tool bit to rotate. The tool bit is commonly used for milling grooves, planes and step surfaces and cutting workpieces, and has the characteristics of wide application range and high processing precision.

At present, common tool bits on the market generally cannot give consideration to both application range and machining precision, and machining efficiency and service life are also lower, so that tool bits which can meet composite requirements of high machining efficiency, high machining precision, multiple application occasions and the like are lacked.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a tool bit and a tool including the tool bit to solve the above problems.

The embodiment of the application provides a tool bit for milling process, including the cutter body with evenly encircle to locate a plurality of cutting parts on the cutter body, it is adjacent form the sword groove between the cutting part, the cutting part is including the first blade, second blade and the third blade that connect gradually, first blade the second blade with the same rake face of third blade sharing. The cutting part still includes knife face behind first back knife face, the second and knife face behind the third, first blade is located the rake face with between the knife face behind the first, the second blade is located the rake face with between the knife face behind the second, the third blade is located the rake face with between the knife face behind the third.

In one possible embodiment, the width of the second flank surface gradually decreases in a direction from the rake surface to the second flank surface.

In one possible embodiment, the first flank surface, the second flank surface, and the third flank surface are each provided with an edge surface on a side close to the rake surface, the edge surfaces being adjacent to the first edge, the second edge, and the third edge.

In one possible embodiment, the cutting edge surface includes a first cutting edge surface, a second cutting edge surface and a third cutting edge surface, which are sequentially arranged, the first cutting edge surface is arranged between the first flank surface and the first cutting edge, the second cutting edge surface is arranged between the second flank surface and the second cutting edge, and the third cutting edge surface is arranged between the third flank surface and the third cutting edge.

In a possible embodiment, the first edge surface is arranged at an angle to the first flank surface and the third edge surface is arranged at an angle to the third flank surface for achieving a reduction in the width of the second flank surface.

In a possible embodiment, the tool bit further comprises a first arc surface and a second arc surface, the first arc surface is disposed between the first flank surface and the second flank surface, and the second arc surface is disposed between the second flank surface and the third flank surface.

In a possible embodiment, an included angle formed by a circumferential tangent of the cutter head and the second flank is a flank first clearance angle, and the flank first clearance angle is 6 to 12 °.

In a possible embodiment, a radial included angle between the rake face and the cutter body is a cutter groove rake angle, the cutter groove rake angle is 0-6 °, an axial included angle between the rake face and the cutter body is a cutter groove helical angle, and the cutter groove helical angle is 0-5 °.

In a possible embodiment, an included angle between a boundary line of the first flank face and the second flank face and a cross section of the cutter body is 3 to 6 °, the cross section is perpendicular to the axial direction of the cutter head, and an included angle between a boundary line of the third flank face and the second flank face and the cross section is 6 to 9 °.

The embodiment of the application further provides a cutter, which comprises a cutter handle and the cutter head, wherein the cutter handle is connected with the center of the cutter body of the disc part. The tool bit further comprises a tool handle, and the tool handle is connected with the center of the tool body.

The utility model provides a tool bit mills the cutting edge through setting up a plurality of cusps, and is equipped with the knife face of three slope on the cutting edge and reduces the mode of back knife face, realizes that life is of a specified duration, machining efficiency is high, the high beneficial effect of machining precision, has wider application scene simultaneously. This application simultaneously proposes a cutter including this tool bit.

Drawings

Fig. 1 is a schematic view of a tool tip according to an embodiment of the present application.

FIG. 2 is a schematic view of another perspective of the tool tip shown in FIG. 1.

Fig. 3 is a schematic top view of the tool tip shown in fig. 1.

FIG. 4 is a schematic top view of the tool tip shown in FIG. 1.

FIG. 5 is a schematic view of a tool tip according to an embodiment of the present application.

Fig. 6 is a side view of the blade portion of the cutter head shown in fig. 1.

Description of the main elements

Tool bit 100

Cutter body 10

First cutting edge 11

Second cutting edge 12

Third cutting edge 13

Blade part 20

First flank surface 21

First facet 211

Second flank surface 22

Second facet 221

Third flank 23

Third edge surface 231

First cambered surface 24

Second cambered surface 25

Rake face 26

Knife groove 30

Cutting tool 200

Knife handle 210

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. 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 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 application 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 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, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of 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 the case may be.

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 "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. The first feature being "under," "beneath," and "under" the 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.

The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize the application of other processes and/or the use of other materials.

Referring to fig. 1, an embodiment of the present application provides a cutting tool 200, which includes a tool shank 210 and a tool bit 100. The shank 210 may be integrally formed with the cutting head 100, or may be welded to the cutting head 100 based on the conventional shank 210. In one embodiment, shank 210 is formed integrally with tool tip 100, and shank 210 has a diameter equal to the diameter of the outer edge of tool tip 100 to facilitate deep milling of grooves and flats.

Referring to fig. 2 and 3, an embodiment of the present invention provides a cutter head 100, which includes a cutter body 10 and a plurality of blade portions 20 uniformly surrounding the cutter body 10, wherein the blade portions 20 include a first cutting edge 11, a second cutting edge 12 and a third cutting edge 13 connected in sequence, and the first cutting edge 11, the second cutting edge 12 and the third cutting edge 13 share the same rake surface 26. The edge portion 20 further includes a first flank surface 21, a second flank surface 22, and a third flank surface 23, the first cutting edge 11 is provided between the rake surface 26 and the first flank surface 21, the second cutting edge 12 is provided between the rake surface 26 and the second flank surface 22, and the third cutting edge 13 is provided between the rake surface 26 and the third flank surface 23. The width of the second flank surface 22 gradually decreases in a direction from the rake surface 26 to the second flank surface 22. In the present embodiment, the width of the second flank surface 22 gradually decreases in the rotational direction a of the tool tip 100. The cutter grooves 30 are formed between the adjacent blade portions 20. The first cutting edge 11, the second cutting edge 12 and the third cutting edge 13 are driven by a power device to mill a workpiece.

In an embodiment of the present application, eight blade portions 20 are disposed on the cutter body 10, the eight blade portions 20 are uniformly distributed on the periphery of the cutter body 10, a knife groove 30 recessed toward the cutter body 10 is formed between adjacent blade portions 20, and the bottom of the knife groove 30 is provided with an arc surface. When the tool bit 100 mills a workpiece, the tool groove 30 can accommodate chips milled from the workpiece, and the chips are gradually thrown outwards along the tool groove 30, so that the chips are prevented from being accumulated or stuck on the rake surface 26 or the transition surface 27, thereby affecting the subsequent milling and reducing the machining precision. The first flank surface 21, the second flank surface 22 and the third flank surface 23 are provided with edge surfaces on the sides close to the rake surface 26, and the edge surfaces are adjacent to the first cutting edge 11, the second cutting edge 12 and the third cutting edge 13. The cutting surfaces include a first cutting surface 211, a second cutting surface 221 and a third cutting surface 231 which are arranged in sequence, the first cutting surface 211 is arranged between the first flank 21 and the first cutting edge 11, the second cutting surface 221 is arranged between the second flank 22 and the second cutting edge 12, and the third cutting surface is arranged between the third flank 23 and the third cutting edge 13. The first edge surface 211 is disposed at an angle to the first flank surface 21, and the third edge surface 231 is disposed at an angle to the third flank surface 23, thereby achieving a reduction in the width of the second flank surface 22. The second facet 221 is also disposed at an angle to the second relief surface 22. The included angle of each blade surface and each rear cutter surface enables the rear cutter surface to bend inwards, and the secondary touch of a workpiece in the milling process is avoided, so that the processing quality is not affected.

Referring to fig. 2 and 6, along the rotation direction a of the tool tip 100, i.e. the direction from the rake face 26 to the second flank face 22, the width W of the second flank face 22 is gradually reduced, so that the contact surface between the second flank face 22 and the workpiece is reduced, the risk of tool jamming is reduced, and the usability of the tool tip 100 is improved. While a smaller contact surface may improve the life and machining accuracy of the tool tip 100.

The cutting head 100 is made of, but not limited to, a tungsten steel alloy having characteristics of high hardness, high strength, high wear resistance and good toughness.

In one embodiment, the maximum diameter D of the tool tip 100 is 8-50 mm, and the maximum diameter D occurs at the junction of the second flank surface 22 and the rake surface 26. To the diameter no longer than 8 mm's tool bit 100, the minor diameter is used for guaranteeing higher machining precision, consequently 8 ~ 50 mm's major diameter's tool bit 100 can be applied to wider field in this application, effectively improves the efficiency of milling simultaneously to the realization is to the high accuracy processing of large-scale work piece, like car main shaft etc..

In an embodiment, an included angle formed by the circumferential tangent line of the tool bit 100 and the second flank surface 22 is a first flank surface clearance angle α, the first flank surface clearance angle α is 6 to 12 °, the portion mainly cut in the milling process is the second cutting edge 12, the first flank surface clearance angle α can reduce the contact area between the second flank surface 22 and the processed workpiece, reduce the resistance in milling, and simultaneously avoid the second cutting edge 12 from damaging the back and the blunt second flank surface 22 from rubbing with the workpiece, so as to ensure the processing precision and reduce the wear of the blade face.

Referring to fig. 4, in an embodiment, a radial included angle between the rake surface 26 and the cutter body 10 is a rake angle β, and the rake angle β is 0 to 6 °. The pocket rake angle β is set such that the rake surface 26 is inclined radially with respect to the cutter body 10, enhancing the effect of the pocket 30 in accommodating milling chips to improve the reliability in use.

Referring to fig. 5, in an embodiment, an included angle between the rake surface 26 and the first direction B is a sipe helix angle γ, and the sipe helix angle γ is 0 to 5 °. The cutter groove helical angle gamma enables the cutter grooves 30 to form a helical surface, and the chips can move in the helical direction to be separated from the milling position in the milling process, so that the chips at the milling position are reduced, and the machining precision is improved.

Referring to fig. 6, in an embodiment, along the first direction B, the thickness L of the blade portion 20 is 2 to 8mm, and the thickness L of the blade portion 20 does not exceed the thickness of the cutter body 10. The thickness L of the blade portion 20 corresponds to the maximum diameter D of the cutter head 100 and does not exceed the thickness of the cutter body 10, so that the cutter head 100 performs groove machining.

Referring to fig. 6, in an embodiment, an angle δ between a boundary line of the first flank surface 21 and the second flank surface 22 and a cross section of the cutter body 10 is 3 to 6 °, and the cross section is perpendicular to an axial direction of the cutter head 100.

In one embodiment, an included angle e between the cross section and the boundary line of the third flank surface 23 and the second flank surface 22 is 6 to 9 °. The first flank surface 21, the third flank surface 23 and the second flank surface 22 form an included angle, so that the width of the second flank surface 22 is gradually reduced along the rotation direction a of the tool tip 100.

In an embodiment, a first arc surface 24 is disposed at a boundary between the first blade surface 211 and the second blade surface 221, a second arc surface 25 is disposed at a boundary between the third blade surface 231 and the second blade surface 221, the first arc surface 24 and the second arc surface 25 are obtained by grinding, and the lengths of the arc surfaces are both smaller than the width of the second blade surface 221. The first cambered surface 24 and the second cambered surface 25 can avoid the damage of blade tipping, opening breakage and the like caused by the fact that the interface of each blade surface is too sharp, so that the service life of the cutter head 100 is prolonged by polishing the cambered surfaces, the stability of the cutter head 100 is improved, and the machining precision is improved.

The tool bit 100 provided by the application has the advantages that the machining precision can reach 0.01mm, the application range is wide, and the tool bit can be used for customized machining. Compared with the prior art, the machining efficiency can be improved by at least 50% while the machining precision is guaranteed, and the method can be applied to the fields of precision instruments, aeronautical instruments, automobile manufacturing and the like.

It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive.

Although the present application has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present application.

Claims (10)

1. A cutter head is used for milling and comprises a cutter body and a plurality of cutting parts which are uniformly arranged on the cutter body in a surrounding mode, and cutter grooves are formed between every two adjacent cutting parts; the cutting part still includes knife face behind first back knife face, the second and knife face behind the third, first blade is located the rake face with between the knife face behind the first, the second blade is located the rake face with between the knife face behind the second, the third blade is located the rake face with between the knife face behind the third.

2. The tool bit of claim 1, wherein the second relief surface tapers in width in a direction from the rake surface to the relief surface.

3. The cutter head of claim 2, wherein the first, second and third relief surfaces each have a facet adjacent to the first, second and third edges on a side thereof adjacent to the rake surface.

4. The tool bit of claim 3, wherein the facets comprise a first facet, a second facet, and a third facet in that order, the first facet being disposed between the first relief surface and the first edge, the second facet being disposed between the second relief surface and the second edge, and the third facet being disposed between the third relief surface and the third edge.

5. The tool bit of claim 4, wherein the first facet is angled with respect to the first relief surface and the third facet is angled with respect to the third relief surface for achieving a reduction in width of the second relief surface.

6. The tool bit of claim 1, further comprising a first arc surface disposed between the first relief surface and the second relief surface and a second arc surface disposed between the second relief surface and the third relief surface.

7. The cutter head according to claim 1, wherein an angle formed by a circumferential tangent of the cutter head and the second flank face is a flank face first clearance angle, and the flank face first clearance angle is 6 to 12 °.

8. The cutter head according to claim 1, wherein a radial angle between the rake face and the cutter body is a flute rake angle, the flute rake angle is 0 to 6 °, an axial angle between the rake face and the cutter body is a flute helix angle, and the flute helix angle is 0 to 5 °.

9. The cutter head according to claim 1, wherein an angle between a boundary line of the first flank face and the second flank face and a cross section of the cutter body is 3 to 6 °, the cross section is perpendicular to an axial direction of the cutter head, and an angle between a boundary line of the third flank face and the second flank face and the cross section is 6 to 9 °.

10. A cutting tool comprising a shank and further comprising a cutting head according to any one of claims 1 to 9, wherein the shank is attached to the center of the tool body.

Images