CN217492820U - Composite cutter - Google Patents

Abstract

The application discloses compound cutting tool, including handle of a knife and tool bit, the tool bit is located handle of a knife tip. The tool bit comprises a milling edge and a spherical edge. The milling edge is arranged at the end part of the cutter handle and comprises a cutting part, and the cutting part is used for finely trimming the hole wall of a product. The spherical blade is arranged at the end part of the milling blade far away from the cutter handle, the outer diameter of the spherical blade is smaller than that of the milling blade, the spherical blade comprises a spherical part, the spherical part is arranged at the end part of the spherical blade far away from the milling blade, and the spherical part is used for finely trimming the chamfer part of the adjacent hole wall. The composite cutter can shorten the debugging time and improve the working efficiency by finishing the hole wall by the cutting part and finishing the chamfer part by the spherical part; the processing quality of the chamfer part can be improved through the spherical part with the spherical structure.

Description

Composite cutter

Technical Field

The application belongs to the technical field of cutter processing, and particularly relates to a compound cutter.

Background

At present, when processing the hole that requires the pore wall not have deckle edge, do not have obvious circle sword line and drill way chamfer no burr, general cutter can't reach the processing requirement to realize the effect of product highlight hi-lite, and, generally need use two kinds of cutters to pore wall and drill way processing respectively, then need longer time to change, debug the cutter, lead to machining efficiency lower.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a compound cutting tool to process different positions of the hole wall, shorten the debugging time, and improve the working efficiency.

The embodiment of the application provides a compound tool, including handle of a knife and tool bit, the tool bit is located handle of a knife tip. The tool bit comprises a milling edge and a ball-shaped edge. The milling edge is arranged at the end part of the cutter handle and comprises a cutting part, and the cutting part is used for finely trimming the hole wall of a product. The spherical blade is arranged at the end part of the milling blade far away from the cutter handle, the outer diameter of the spherical blade is smaller than that of the milling blade, the spherical blade comprises a spherical part, the spherical part is arranged at the end part of the spherical blade far away from the milling blade, and the spherical part is used for finely trimming the chamfer part of the adjacent hole wall.

The composite cutter can shorten the debugging time and improve the working efficiency by finishing the hole wall by the cutting part and finishing the chamfer part of the adjacent hole wall by the spherical part; the processing quality of the chamfer part of the hole wall can be improved through the spherical part of the spherical structure.

In some embodiments of the present application, the cutting head further includes a transition portion disposed between the milling edge and the ball edge, the transition portion connecting the milling edge and the ball edge.

In some embodiments of the present application, the compound tool further includes a centering portion located at an end of the ball portion distal from the milling edge, the centering portion being located at a center of the ball portion.

In some embodiments of the present application, the spherical portion is a hemispherical structure having a radius r, wherein r is greater than or equal to 0.49mm and less than or equal to 0.51 mm.

In some embodiments of the present application, the length of the ball-type edge along the central axis of the tool shank is L1, wherein L1 is 1.9mm or more and 1.95mm or less. When the spherical part is used for processing the hole opening, the length range of the spherical blade can avoid the interference between the milling blade and the chamfer part of the hole wall.

In some embodiments of the present application, the cutting portion comprises two cutting edges, the two cutting edges being helically disposed in spaced relation to each other; the spherical blade further comprises two chamfer blades, the two chamfer blades are spirally arranged at intervals, and the end parts of the two chamfer blades form the spherical part.

In some embodiments of the present application, a back width of the cutting edge is f1, wherein f1 is greater than or equal to 0.05mm and less than or equal to 0.11mm, which can ensure the processing quality of the product and realize the effect of high brightness of the processing surface of the product.

In some embodiments of the present application, a back width of the chamfer edge is f2, wherein f2 is more than or equal to 0.07mm and less than or equal to 0.13mm, which can ensure the processing quality of the product and realize the effect of high brightness of the processed surface of the product.

In some embodiments of the present application, a radial clearance angle of the chamfer edge is α 1, wherein α 1 is greater than or equal to 11 ° and less than or equal to 13 °, so as to ensure the processing quality of the product and realize the effect of high brightness of the processed surface of the product; the radial secondary relief angle of the chamfer edge is alpha 2, wherein the alpha 2 is more than or equal to 23 degrees and less than or equal to 27 degrees.

In some embodiments of the present application, a radial clearance angle of the cutting edge is β 1, wherein β 1 is greater than or equal to 5 ° and less than or equal to 7 °, so as to ensure the processing quality of the product and achieve the effect of high brightness of the processed surface of the product; the radial secondary relief angle of the cutting edge is beta 2, wherein beta 2 is more than or equal to 8 degrees and less than or equal to 12 degrees.

In some embodiments of the present application, the cutting edge has a land width f3, wherein 0.25mm ≦ f3 ≦ 0.35 mm.

In some embodiments of the present application, the milling edge further comprises a first chip flute disposed between the two cutting edges; the spherical blade further comprises second chip flutes, the second chip flutes are arranged between the two chamfer blades, and the second chip flutes are communicated with the first chip flutes.

In conclusion, the composite cutter can shorten the debugging time and improve the working efficiency by finishing the hole wall by the cutting part and finishing the chamfer part of the adjacent hole wall by the spherical part; the processing quality of the chamfer position of the hole wall can be improved through the spherical part of the spherical structure.

Drawings

FIG. 1 is a first view of a compound tool in one embodiment of the present application.

FIG. 2 is a schematic diagram of a composite tool for machining a hole wall according to an embodiment of the present application.

FIG. 3 is a schematic structural diagram of a composite cutting tool for machining a hole wall chamfer in one embodiment of the present application.

FIG. 4 is a schematic view of a portion of a tool tip in an embodiment of the present application.

FIG. 5 is a schematic view of the structure of a compound cutting tool in one embodiment of the present application.

FIG. 6 is a second view of a compound tool in an embodiment of the present application.

Fig. 7 is a schematic view of the section VII-VII in fig. 4.

Fig. 8 is a schematic view of a cutting edge structure in an embodiment of the present application.

Fig. 9 is a schematic view of a chamfer edge in an embodiment of the present application.

Description of the main elements

Composite cutter 100

Knife handle 10

Cutting head 20

Milling edge 21

Core 211

Cutting portion 212

Cutting edge 2121

First chip pocket 213

Ball type blade 22

Shaft 221

Ball portion 222

Chamfered edge 223

Second chip flute 224

Transition section 23

Connecting part 30

Centering portion 40

Pore wall 200

Chamfered portion 300

The following detailed description will further illustrate the present application in conjunction with the above-described figures.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and encompass, for example, both fixed and removable connections or integral connections; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between 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 appropriate.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

The embodiment of the application provides a compound tool for processing high accuracy hole, and compound tool includes handle of a knife and tool bit, the tool bit is located handle of a knife tip. The tool bit comprises a milling edge and a ball-shaped edge. The milling edge is arranged at the end part of the cutter handle and comprises a cutting part, and the cutting part is used for finely trimming the hole wall of a product. The spherical blade is arranged at the end part of the milling blade far away from the cutter handle, the outer diameter of the spherical blade is smaller than that of the milling blade, the spherical blade comprises a spherical part, the spherical part is arranged at the end part of the spherical blade far away from the milling blade, and the spherical part is used for finely trimming the chamfer part of the adjacent hole wall.

The composite cutter can shorten the debugging time and improve the working efficiency by finishing the hole wall by the cutting part and finishing the chamfer part of the adjacent hole wall by the spherical part; the processing quality of the chamfer part of the hole wall can be improved through the spherical part of the spherical structure.

Embodiments of the present application will be further described with reference to the drawings.

As shown in fig. 1, 2 and 3, embodiments of the present application provide a composite cutting tool 100 that may be used to finish a hole wall 200 and a chamfer portion 300 of a product. The compound cutting tool 100 includes a tool shank 10 and a tool tip 20, and the tool tip 20 is provided at an end portion of the tool shank 10.

In one embodiment, the composite cutting tool 100 is a one-piece structure. In one embodiment, the material of the composite cutting tool 100 is 7K03 aluminum alloy.

The tool shank 10 may be used for an operator to hold to access the composite cutting tool 100 and for automated equipment to grip to rotate the composite cutting tool 100. In one embodiment, the tool shank 10 is a cylindrical structure, and optionally, the tool shank 10 has a diameter of 4 mm. In other embodiments, the tool shank 10 may be rectangular, elongated with a D-shaped cross-section, or other shaped configurations.

The tool shank 10 may rotate the tool tip 20 such that the tool tip 20 rotates to finish the hole wall 200 or the chamfer portion 300.

In one embodiment, the composite cutting tool 100 further includes a connecting portion 30, the connecting portion 30 being disposed between the cutting head 20 and the tool shank 10, the connecting portion 30 connecting the cutting head 20 and the tool shank 10. The connecting portion 30 serves as a connecting transition for connecting the tool shank 10 and the tool tip 20 to improve the structural strength of the composite cutting tool 100.

In one embodiment, the connecting portion 30 has a conical structure.

The cutter head 20 comprises a milling edge 21 and a spherical edge 22 which are connected with each other, one end of the milling edge 21 is connected with a connecting part 30, and the other end of the milling edge 21 is connected with the spherical edge 22.

The milling edge 21 may be used to finish the bore wall 200 as shown in fig. 2. The ball-type edge 22 may be used to refine the chamfered portion 300 of the adjacent bore wall 200, as shown in FIG. 3.

As shown in fig. 4 and 5, the milling edge 21 includes a core 211 and a cutting portion 212, the core 211 and the cutting portion 212 are connected to the connecting portion 30, and the cutting portion 212 is provided on an outer surface of the core 211. The cutting portion 212 may be used to finish the bore wall 200 when the composite tool 100 is rotated to machine a product.

In one embodiment, the outer diameter of the milling edge 21 is D1, where D1 is 1.3 mm. The milling edge 21 may be used to finish the inner wall of a milled aperture having an inner diameter of not less than 1.3 mm.

In one embodiment, the cutting portion 212 includes two cutting edges 2121, and the two cutting edges 2121 are spirally arranged on the outer surface of the core 211 in a spaced-apart manner. Two cutting edges 2121 may be used to finish the hole wall 200 when the compound tool 100 is rotated to machine a product.

In one embodiment, the helix angle of the cutting edge 2121 is β 4, wherein 29 ° ≦ β 4 ≦ 31 °. Alternatively, β 4 is 30 °.

In an embodiment, the milling edge 21 further comprises a first chip flute 213, the first chip flute 213 being provided between the two cutting edges 2121. When the compound tool 100 rotates to process a product, the first chip pocket 213 may receive chips generated by the cutting edge 2121 and discharge the chips, thereby reducing the influence of the chips on the cutting edge 2121. The first chip pocket 213 may also increase the surface area of the composite cutter 100, increase the heat dissipation rate of the composite cutter 100, and reduce the risk of damage to the cutting edge 2121 due to high temperatures. Alternatively, the number of the first chip flutes 213 is two, and two first chip flutes 213 are respectively provided between the two cutting edges 2121.

In one embodiment, the groove bottom surface of the first chip groove 213 is polished to reduce frictional resistance with chips and improve chip evacuation capability.

In other embodiments, the number of the cutting edges 2121 may be three, four or more (not shown), and the number of the cutting edges 2121 on the cutting portion 212 is not specifically limited herein. Alternatively, the number of the first chip flutes 213 is equal to the number of the cutting edges 2121, and the first chip flutes 213 and the cutting edges 2121 are staggered.

When the number of the cutting edges 2121 is two, the chip removal capability of the first chip pocket 213 can be improved on the premise of ensuring the machining quality of the hole wall 200, the influence of chips on the abrasion of the cutting edges 2121 can be reduced, and the service life of the composite cutting tool 100 can be prolonged.

The ball-type blade 22 includes a shaft portion 221 and a ball-type portion 222, the shaft portion 221 is connected to the core portion 211, and the ball-type portion 222 is disposed at an end of the shaft portion 221 away from the core portion 211. The spherical portion 222 may be used to finish the chamfered portion 300 of the adjacent bore wall 200 when the composite tool 100 is rotated to machine a product.

In one embodiment, the outside diameter of the ball blade 22 is D2, wherein D2 is 1 mm.

Optionally, the ball portion 222 has a hemispherical structure. When the ball portion 222 finishes the chamfer portion, the ball portion 222 can highlight the texture at the chamfer portion, thereby improving the processing quality.

In one embodiment, the radius of the hemispherical structure is r, wherein r is 0.49mm or less and is 0.51mm or less, and optionally r is 0.5mm, and the radius can be used for machining the chamfer part 300 of the small hole.

In an embodiment, the ball-type edge 22 further includes two chamfer edges 223, the two chamfer edges 223 are spirally disposed on the surface of the shaft portion 221 at intervals, and ends of the two second chamfer edges 223 far away from the milling edge 21 form the ball-type portion 222.

In one embodiment, the helix angle of the chamfer edge 223 is α 3, wherein α 3 is 29 ° or more and 31 ° or less. Optionally, α 3 is 30 °.

In one embodiment, the ball-type edge 22 further includes a second chip groove 224, and the second chip groove 224 is disposed between the two chamfered edges 223. When the composite cutting tool 100 rotates to process a product, the second chip groove 224 can receive chips generated by processing the ball-shaped portion 222 and discharge the chips, so that the influence of the chips on the ball-shaped portion 222 is reduced. The second chip flutes 224 also increase the surface area of the composite cutter 100, increase the heat dissipation rate of the composite cutter 100, and reduce the risk of damage to the ball portion 222 due to high temperatures. Alternatively, the number of the second chip flutes 224 is two, and two second chip flutes 224 are respectively provided between the two chamfered edges 223.

In an embodiment, the second chip groove 224 communicates with the first chip groove 213, so that the chips in the second chip groove 224 can be discharged through the first chip groove 213, thereby improving the chip discharging capability.

In one embodiment, the second chip groove 224 is mirror polished to reduce frictional resistance with chips and improve chip removal.

In other embodiments, the number of the chamfering edge 223 may be three, four or more (not shown), and the number of the chamfering edge 223 is not particularly limited in the present application. Alternatively, the number of the second chip flutes 224 is equal to the number of the chamfer edges 223, and the second chip flutes 224 and the chamfer edges 223 are alternately arranged. Optionally, the number of second flutes 224 is equal to the number of first flutes 213.

When the number of the chamfering edges 223 is two, on the premise of ensuring the chamfering processing quality, the chip removal capability of the second chip groove 224 can be improved, the influence of the chips on the abrasion of the spherical portion 222 is reduced, and the service life of the composite cutter 100 is prolonged.

In an embodiment, the tool tip 20 further includes a transition portion 23, the transition portion 23 is disposed between the milling edge 21 and the ball edge 22, and the transition portion 23 connects the milling edge 21 and the ball edge 22. Along the central axis of the core 211, the cross-sectional area of the transition portion 23 gradually decreases in a direction approaching the ball edge 22. In an embodiment, the transition portion 23 can function as a clearance connection, and when the spherical portion 222 finishes the chamfer portion of the product, the transition portion 23 can prevent the milling edge 21 from touching the product, thereby ensuring the processing quality of the product. In one embodiment, the transition portion 23 serves as a connecting transition to engage the cutting edge 2121 and the chamfer edge 223 to improve the structural strength of the cutting tip 20.

In one embodiment, the transition portion 23 is a rounded structure. Optionally, the fillet radius is 0.1 mm.

In one embodiment, the length of the spherical edge 22 along the length direction of the tool holder 10 is L1, wherein L1 is more than or equal to 1.9mm and less than or equal to 1.95 mm. Optionally, L1 is 1.9mm, and when the spherical portion 222 finishes the chamfer portion 300, the length range of the spherical edge 22 can avoid the interference between the transition portion 23 and the milling edge 21 and the chamfer portion 300.

In one embodiment, the length of the tool bit 20 is L2 along the length direction of the tool holder 10, wherein L2 is 6mm or more and 6.3mm or less. Alternatively, L2 is 6.3 mm.

As shown in fig. 5 and 6, the composite tool 100 further includes a centering portion 40, the centering portion 40 is located at an end of the ball portion 222 away from the milling edge 21, and the centering portion 40 is located at a center of the ball portion 222 as viewed along a central axis direction of the composite tool 100. The centering portion 40 can be used for auxiliary positioning, and the position of the composite tool 100 can be accurately positioned by determining the position of the centering portion 40, so that the precision of transferring the composite tool 100 is improved, the deviation of a machining position is reduced, and the machining quality is improved.

As shown in FIGS. 7 and 8, in one embodiment, the cutting edge 2121 has a back width f1, wherein 0.05mm ≦ f1 ≦ 0.11 mm. Optionally, f1 is 0.08mm, which can ensure the cutting strength of the cutting edge 2121, reduce the risk of edge breakage of the cutting edge 2121, ensure the processing quality of the product, and realize the effect of high brightness of the hole wall 200.

In one embodiment, the cutting edge 2121 has a width f3, wherein f3 is 0.25 mm-0.35 mm. Alternatively, f3 is 0.3mm, which can ensure the cutting strength of the cutting edge 2121 and reduce the risk of edge breakage of the cutting edge 2121.

In one embodiment, the cutting edge 2121 has a radial clearance angle β 1, wherein β 1 is greater than or equal to 5 ° and less than or equal to 7 °. Optionally, β 1 is 6 °, so that the interference between the cutting edge 2121 and the machined surface can be avoided, the machining quality of the machined surface can be guaranteed, the machining quality of the product can be guaranteed, and the effect of high brightness of the hole wall 200 can be realized.

In one embodiment, the radial secondary relief angle of the cutting edge 2121 is β 2, wherein β 2 is 8 ° or more and 12 ° or less. Alternatively, β 2 is 10 °, so that the interference of the cutting edge 2121 with the machined surface can be avoided, and the machining quality of the machined surface can be ensured.

In one embodiment, the cutting edge 2121 has an edge inclination angle β 3, wherein β 3 is 5 ° or more and 7 ° or less. Alternatively, β 3 is 6 °, which ensures the cutting strength of the cutting edge 2121, reduces the risk of chipping of the cutting edge 2121, and promotes discharge of chips generated by machining.

In one embodiment, the axial clearance angle of the cutting edge 2121 is β 5, wherein β 5 is 5 ° or more and β 5 ° or less and 7 ° or more. Alternatively, β 5 is equal to 6 °, so that the interference between the cutting edge 2121 and the machined surface can be avoided, and the machining quality of the machined surface can be ensured.

In one embodiment, the axial secondary relief angle of the cutting edge 2121 is β 6, wherein 8 ° ≦ β 6 ≦ 12 °. Alternatively, β 6 is 10 °, which can avoid interference between the cutting edge 2121 and the machined surface, and ensure the machining quality of the machined surface.

As shown in FIG. 9, in one embodiment, the back width of the chamfer edge 223 is f2, wherein f2 is more than or equal to 0.07mm and less than or equal to 0.13 mm. Optionally, f2 is 0.1mm, can guarantee the cutting strength of chamfer sword 223, reduces the risk that the chamfer sword 223 appears tipping, still can guarantee the processingquality of product, realizes the effect of the highlight hi-lite of chamfer position 300.

In one embodiment, the radial clearance angle of the chamfer edge 223 is α 1, wherein α 1 is greater than or equal to 11 ° and less than or equal to 13 °. Optionally, α 1 is 12 °, so that the chamfer edge 223 can be prevented from interfering with the machined surface, the machining quality of the machined surface can be ensured, the machining quality of the product can be ensured, and the high-brightness effect of 300 high-brightness chamfer parts can be realized.

In one embodiment, the radial secondary relief angle of the chamfer edge 223 is α 2, wherein α 2 is greater than or equal to 23 ° and less than or equal to 27 °. Alternatively, α 2 is 25 °, interference between the chamfer edge 223 and the machined surface can be avoided, and the machining quality of the machined surface can be ensured.

In one embodiment, the chamfer edge 223 has an axial relief angle α 4, wherein α 4 is 11 ° or more and 13 ° or less. Optionally, α 4 is 12 °, so that the chamfer edge 223 is prevented from interfering with the machined surface, and the machining quality of the machined surface is ensured.

In one embodiment, the axial relief angle of the chamfer edge 223 is α 5, wherein α 5 is greater than or equal to 23 ° and less than or equal to 27 °. Optionally, α 5 is 25 °, so that the chamfered edge 223 is prevented from interfering with the machined surface, and the machining quality of the machined surface is ensured.

In summary, the composite cutting tool 100 refines the hole wall 200 through the cutting portion 212 and refines the chamfer portion 300 of the adjacent hole wall 200 through the spherical portion 222, so as to shorten the debugging time and improve the working efficiency; the ball portion 222 having a spherical structure can improve the processing quality of the chamfered portion 300 of the hole wall 200.

In addition, other changes may be made by those skilled in the art within the spirit of the present disclosure, and it is understood that all changes that come within the spirit of the disclosure are to be embraced therein.

Claims (10)

1. The utility model provides a compound tool, includes handle of a knife and tool bit, the tool bit is located handle of a knife tip, its characterized in that, the tool bit includes:

the milling edge is arranged at the end part of the cutter handle and comprises a cutting part, and the cutting part is used for finishing the hole wall of a product;

the spherical blade is arranged at the end part, far away from the cutter handle, of the milling blade, the outer diameter of the spherical blade is smaller than that of the milling blade, the spherical blade comprises a spherical part, the spherical part is arranged at the end part, far away from the milling blade, of the spherical blade, and the spherical part is used for finishing the chamfer part of the adjacent hole wall.

2. The composite tool of claim 1, wherein the tool tip further comprises a transition portion disposed between the milling edge and the ball edge, the transition portion connecting the milling edge and the ball edge.

3. The composite tool as in claim 1, further comprising a centering portion at an end of the ball portion distal from the milling edge, the centering portion being located at a center of the ball portion.

4. The composite tool of claim 1, wherein the spherical portion is a hemispherical structure having a radius r, wherein r is 0.49mm or less and 0.51mm or less.

5. The composite cutter according to claim 1,

the cutting part comprises two cutting edges which are spirally arranged at intervals;

the spherical blade further comprises two chamfer blades, the two chamfer blades are spirally arranged at intervals, and the end parts of the two chamfer blades form the spherical part.

6. The composite tool as set forth in claim 5, wherein a back width of the cutting edge is f1, wherein 0.05mm ≦ f1 ≦ 0.11 mm.

7. The composite tool as set forth in claim 5, wherein the chamfer edge has a back width f2, wherein 0.07mm ≦ f2 ≦ 0.13 mm.

8. The composite cutter of claim 5,

the radial one-relief angle of the chamfer edge is alpha 1, wherein alpha 1 is more than or equal to 11 degrees and less than or equal to 13 degrees;

the radial secondary relief angle of the chamfer edge is alpha 2, wherein the alpha 2 is more than or equal to 23 degrees and less than or equal to 27 degrees.

9. The composite cutter of claim 5,

the radial clearance angle of the cutting edge is beta 1, wherein beta 1 is more than or equal to 5 degrees and less than or equal to 7 degrees;

the radial secondary relief angle of the cutting edge is beta 2, wherein beta 2 is more than or equal to 8 degrees and less than or equal to 12 degrees.

10. The composite cutter of claim 5,

the milling blade further comprises a first chip pocket, and the first chip pocket is arranged between the two cutting edges;

the spherical blade further comprises second chip flutes, the second chip flutes are arranged between the two chamfer blades, and the second chip flutes are communicated with the first chip flutes.

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