CN106808002B - End milling cutter and manufacturing method - Google Patents
End milling cutter and manufacturing method Download PDFInfo
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- CN106808002B CN106808002B CN201710038643.9A CN201710038643A CN106808002B CN 106808002 B CN106808002 B CN 106808002B CN 201710038643 A CN201710038643 A CN 201710038643A CN 106808002 B CN106808002 B CN 106808002B
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- milling cutter
- sleeve
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/02—Milling-cutters characterised by the shape of the cutter
- B23C5/06—Face-milling cutters, i.e. having only or primarily a substantially flat cutting surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2200/00—Details of milling cutting inserts
- B23C2200/12—Side or flank surfaces
- B23C2200/121—Side or flank surfaces with projections
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Abstract
The invention relates to an end milling cutter and a manufacturing method thereof, belonging to the technical field related to the processing of plastic-steel doors and windows. The end mill mainly includes: the milling cutter comprises at least two milling cutter blades and an upper cover, wherein each milling cutter blade is provided with a cutter head; one of the milling cutter sheets is provided with two threaded holes, the upper cover and other milling cutter sheets are respectively provided with two assembling holes, the center distance of the assembling holes on the same milling cutter sheet is equal to the center distance of the threaded holes on the same milling cutter sheet, and the center distance of the assembling holes on the upper cover is also equal to the center distance of the threaded holes on the same milling cutter sheet; a through sleeve is arranged between the adjacent milling blades, and two assembling holes are also formed in the through sleeve; the center distance of the assembling holes on the through sleeve is the same as that of the threaded holes on the milling cutter sheet; the upper cover, the milling cutter blade with the assembly hole, the through sleeve and the milling cutter blade with the threaded hole are assembled into a whole through the bolt. The end mill boss is improved, so that the end mill boss has lower processing cost and lower processing difficulty, and the production efficiency of the end mill is greatly improved.
Description
Technical Field
The invention relates to the technical field related to plastic-steel door and window processing, in particular to an end milling cutter and a manufacturing method thereof.
Background
The plastic-steel door window generally comprises four outer frames and two windows, wherein the four outer frames are welded by a welding device and then formed, and the welding beading at the welding seam is cleaned and then the window is mounted. Before the single outer frame (namely the section bar) is assembled, an end milling cutter is needed for milling, so that the section bar is provided with a plurality of milling grooves, and the assembly with another section bar with a convex part is realized.
From structural analysis, current end mill includes a plurality of milling cutter pieces, all has the boss on every milling cutter piece, and the welding has the tool bit on the milling cutter piece, and the milling cutter piece passes through the bolt assembly as an organic whole, becomes end mill. When the existing milling cutter blade is machined, the existing milling cutter blade is generally clamped on a lathe, then the milling cutter blade is machined according to the requirement of the width between adjacent milling grooves, and the thickness of a machined boss, namely the distance between the adjacent milling cutter blades, is equal to the width between the adjacent milling cutters. Therefore, the existing end milling cutter has the defects of low processing efficiency and more raw material waste in the manufacturing process.
And because the sheet body part of the milling cutter blade has higher requirement on strength, the milling cutter blade is made of steel. The boss part is formed integrally with the sheet body and is formed by turning, which undoubtedly causes higher processing difficulty and difficulty in reducing cost.
Therefore, how to design an end mill structure with less processing difficulty, low cost and high production efficiency is a problem that needs to be solved urgently by those skilled in the art.
Disclosure of Invention
The present invention aims to overcome the above-mentioned deficiencies of the prior art and to provide an end mill. The end milling cutter has the advantages that the structure of the boss part of the end milling cutter is improved, so that the end milling cutter has lower processing cost and smaller processing difficulty, the distance between adjacent milling cutter blades is very easy to control, and the production efficiency of the end milling cutter is greatly improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
an end mill comprises at least two milling cutter blades and an upper cover, wherein each milling cutter blade is provided with a cutter head;
one of the milling cutter sheets is provided with two threaded holes, the upper cover and other milling cutter sheets are respectively provided with two assembling holes, the center distance of the assembling holes on the same milling cutter sheet is equal to the center distance of the threaded holes on the same milling cutter sheet, and the center distance of the assembling holes on the upper cover is also equal to the center distance of the threaded holes on the same milling cutter sheet;
a through sleeve is arranged between the adjacent milling blades, and two assembling holes are also formed in the through sleeve;
the center distance of the assembling holes on the through sleeve is the same as that of the threaded holes on the milling cutter sheet;
the upper cover, the milling cutter blade with the assembly hole, the through sleeve and the milling cutter blade with the threaded hole are assembled into a whole through the bolt.
Preferably, the material of the through sleeve is aluminum.
Preferably, the through sleeve has a central hole.
Preferably, the through sleeve is provided with a lightening hole.
Preferably, the number of the through sleeves is A, the number of the milling blades is B, and A is B-1.
Preferably, the number of the through sleeves is 1, and the number of the milling blades is 2.
Preferably, the number of the through sleeves is 2, and the number of the milling blades is 3.
Preferably, the number of the through sleeves is 3, and the number of the milling blades is 4.
While providing the above structural solution, the present invention also provides a method for manufacturing the above end mill, which mainly comprises the following steps:
A. cold-drawing the aluminum material into a long cylindrical through sleeve with an assembly hole;
B. cutting the long cylindrical through sleeve into a plurality of short cylindrical through sleeves according to the process requirement;
C. arranging all workpieces orderly according to the sequence of the upper cover, the milling cutter blade with the assembly hole, the through sleeve and the milling cutter blade with the threaded hole, and ensuring that the assembly hole is coincident with the axis of the threaded hole;
D. and tightening the upper cover, the milling cutter blade with the assembly hole, the through sleeve and the milling cutter blade with the threaded hole into an end mill by using a bolt, wherein a screw rod part of the bolt and the threaded hole form a thread pair.
Preferably, in the manufacturing method, the number of the milling blades is greater than or equal to 3, in the step C, the milling blades with the holes to be threaded are arranged at the bottom, the upper cover is arranged at the top, the milling blades with the assembly holes are arranged in the middle, and the milling blades with the assembly holes are arranged in sequence.
The invention has the beneficial effects that:
(1) the distance between the milling blades of the end mill is determined by the thickness of the boss, but the thickness of the through sleeve. The through sleeve is formed by cold drawing of aluminum materials, so that boss turning on a milling cutter sheet is not needed, and the through sleeve is only needed to be cut into a designed thickness to replace a boss, so that the production efficiency is greatly improved, and the production cost is reduced.
(2) The through sleeve is made of aluminum and is provided with a center hole and lightening holes, so that the structural strength can be ensured not to be reduced while the overall quality is reduced, and the overall strength of the end milling cutter is ensured.
Drawings
FIG. 1 is a schematic structural view of example 1 of the present invention;
FIG. 2 is a side view of FIG. 1;
FIG. 3 is a schematic structural view of the well casing in example 1;
FIG. 4 is a schematic structural view of example 2 of the present invention;
FIG. 5 is a side view of FIG. 4;
FIG. 6 is a schematic structural view of a sleeve in example 2;
FIG. 7 is a schematic structural view of example 3 of the present invention;
FIG. 8 is a side view of FIG. 7;
FIG. 9 is a schematic structural view of a sleeve in example 3;
in the figure:
the milling cutter comprises a first milling cutter blade 1-1, a second milling cutter blade 1-2, a third milling cutter blade 1-3, a fourth milling cutter blade 1-4 and a cutter head 1-5;
an upper cover 2-1 and a bolt 2-2;
the device comprises a first through sleeve 3-1, a second through sleeve 3-2, a third through sleeve 3-3, an assembling hole 3-4, a lightening hole 3-5 and a central hole 3-6.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
Example 1: an end mill having a structure as shown in FIGS. 1 to 3,
the milling cutter comprises a first milling cutter blade 1-1, a second milling cutter blade 1-2, an upper cover 2-1 and a first through sleeve 3-1;
a cutter head 1-5 (namely a cutting edge) is welded on each of the first milling cutter blade 1-1 and the second milling cutter blade 1-2;
the second, lower milling insert 1-2 is provided with two threaded holes (not shown), the upper cover is provided with mounting holes (not shown) and the first milling insert 1-1 is also provided with mounting holes (not shown).
A first through sleeve 3-1 is arranged between the first milling cutter blade 1-1 and the second milling cutter blade 1-2;
the first through sleeve 3-1 is provided with two assembly holes 3-4, two lightening holes 3-5 and a central hole 3-6. The first through sleeve 3-1 is made of aluminum.
The center distance of the two threaded holes in the second milling cutter blade 1-2, the center distance of the two assembly holes in the first milling cutter blade 1-1, the center distance of the two assembly holes in the upper cover 2-1 and the center distance of the two assembly holes in the first through sleeve 3-1 are the same.
The bolt 2-2 penetrates through assembly holes in the upper cover 2-1, the first milling cutter blade 1-1 and the first through sleeve 3-1 from top to bottom and is tightened in a threaded hole of the second milling cutter blade 1-2, so that the upper cover 2-1, the first milling cutter blade 1-1, the first through sleeve 3-1 and the second milling cutter blade 1-2 are assembled into a whole.
The end mill provided by the embodiment has the following manufacturing method:
A. cold-drawing the aluminum material into a long cylindrical through sleeve with an assembly hole, a central hole 3-6 and a lightening hole 3-5;
B. according to the process requirements, cutting the long cylindrical through sleeve into a plurality of short cylindrical through sleeves to form a first through sleeve 3-1;
C. placing each workpiece orderly according to the sequence of the upper cover 2-1, the first milling cutter blade 1-1, the first through sleeve 3-1 and the second milling cutter blade 1-2, and ensuring that the assembly holes are coincident with the axes of the threaded holes;
D. and (3) tightening the upper cover 2-1, the first milling cutter blade 1-1, the first through sleeve 3-1 and the second milling cutter blade 1-2 into an end milling cutter by using a bolt 2-2, wherein a screw part of the bolt 2-2 and a threaded hole form a thread pair.
The end milling cutter provided by the embodiment has no boss structure on all milling cutter sheets, so that the milling cutter blade does not need to be subjected to boss turning processing. And because the through sleeve is arranged between the milling blades, the distance between the milling blades is determined by the through sleeve and is not determined by the boss, when in manufacturing, the through sleeve is only required to be cut according to the set thickness (height), and then the upper cover, the milling blades and the through sleeve are fastened into a whole, so that the production efficiency is greatly improved, and the resources are saved.
The aluminum sleeve is weaker than the conventional boss in strength, but the aluminum sleeve is used for keeping a certain distance between the milling cutter blades and does not participate in cutting, so that the structural strength can still meet the requirement even under the condition of a central hole and a lightening hole.
Example 2: an end mill having a structure as shown in fig. 4-6,
the milling cutter comprises a first milling cutter blade 1-1, a second milling cutter blade 1-2, a third milling cutter blade 1-3, an upper cover 2-1, a first through sleeve 3-1 and a second through sleeve 3-2, wherein cutter heads 1-5 (namely cutting edges) are welded on the first milling cutter blade 1-1, the second milling cutter blade 1-2 and the third milling cutter blade 1-3;
the third, lower milling insert 1-3 is provided with two threaded holes (not shown), the upper cover 2-1 is provided with mounting holes (not shown), and the first and second milling insert 1-1, 1-2 are also provided with mounting holes (not shown).
A first through sleeve 3-1 is arranged between the first milling cutter blade 1-1 and the second milling cutter blade 1-2, and a second through sleeve 3-2 is arranged between the second milling cutter blade 1-2 and the third milling cutter blade 1-3;
the first through sleeve 3-1 and the second through sleeve 3-2 are respectively provided with two assembling holes 3-4, two lightening holes 3-5 and a central hole 3-6. The first through sleeve 3-1 and the second through sleeve 3-2 are made of aluminum.
The center distance of the two threaded holes in the third milling cutter blade 1-3, the center distance of the two assembly holes in the first milling cutter blade 1-1 and the second milling cutter blade 1-2, the center distance of the two assembly holes in the upper cover 2-1, the center distance of the two assembly holes in the first through sleeve 3-1 and the center distance of the two assembly holes in the second through sleeve 3-2 are the same.
The bolt 2-2 penetrates through assembly holes on the upper cover 2-1, the first milling cutter blade 1-1, the first through sleeve 3-1, the second milling cutter blade 1-2 and the second through sleeve 3-2 from top to bottom and is tightened in a threaded hole of the third milling cutter blade 1-3,
the upper cover 2-1, the first milling cutter blade 1-1, the first through sleeve 3-1, the second milling cutter blade 1-2, the second through sleeve 3-2 and the third milling cutter blade 1-3 are assembled into a whole.
The end mill provided by the embodiment has the following manufacturing method:
A. cold-drawing the aluminum material into a long cylindrical through sleeve with an assembly hole, a central hole 3-6 and a lightening hole 3-5;
B. according to the process requirements, cutting the long cylindrical through sleeve into a plurality of short cylindrical through sleeves, namely forming a first through sleeve 3-1 and a second through sleeve 3-2;
C. according to the sequence of the upper cover 2-1, the first milling cutter blade 1-1, the first through sleeve 3-1, the second milling cutter blade 1-2, the second through sleeve 3-2 and the third milling cutter blade 1-3, all workpieces are placed in order, and the assembly holes are enabled to coincide with the axis of the threaded hole;
D. an upper cover 2-1, a first milling cutter blade 1-1, a first through sleeve 3-1, a second milling cutter blade 1-2, a second through sleeve 3-2 and a third milling cutter blade 1-3 are fastened into an end milling cutter by using a bolt 2-2, wherein a screw rod part of the bolt 2-2 and a threaded hole form a thread pair.
The end milling cutter provided by the embodiment has no boss structure on all milling cutter sheets, so that the milling cutter blade does not need to be subjected to boss turning processing. And because the through sleeve is arranged between the milling blades, the distance between the milling blades is determined by the through sleeve and is not determined by the boss, when in manufacturing, the through sleeve is only required to be cut according to the set thickness (height), and then the upper cover, the milling blades and the through sleeve are fastened into a whole, so that the production efficiency is greatly improved, and the resources are saved.
The aluminum sleeve is weaker than the conventional boss in strength, but the aluminum sleeve is used for keeping a certain distance between the milling cutter blades and does not participate in cutting, so that the structural strength can still meet the requirement even under the condition of a central hole and a lightening hole.
Example 3: an end mill having a structure as shown in fig. 7-9,
the milling cutter comprises a first milling cutter blade 1-1, a second milling cutter blade 1-2, a third milling cutter blade 1-3, a fourth milling cutter blade 1-4, an upper cover 2-1, a first through sleeve 3-1, a second through sleeve 3-2 and a third through sleeve 3-3, wherein cutter heads 1-5 (namely cutting edges) are welded on the first milling cutter blade 1-1, the second milling cutter blade 1-2, the third milling cutter blade 1-3 and the fourth milling cutter blade 1-4;
the fourth, lower milling insert 1-4 has two threaded bores (not shown), the upper cover 2-1 has mounting bores (not shown), and the first, second and third milling insert 1-1, 1-2, 1-3 also have mounting bores (not shown).
A first through sleeve 3-1 is arranged between the first milling cutter blade 1-1 and the second milling cutter blade 1-2, a second through sleeve 3-2 is arranged between the second milling cutter blade 1-2 and the third milling cutter blade 1-3, and a third through sleeve 3-3 is arranged between the third milling cutter blade 1-3 and the fourth milling cutter blade 1-4;
the first through sleeve 3-1, the second through sleeve 3-2 and the third through sleeve 3-3 are respectively provided with two assembling holes 3-4, two weight reducing holes 3-5 and a central hole 3-6. The first through sleeve 3-1, the second through sleeve 3-2 and the third through sleeve 3-3 are made of aluminum.
The center distance of two threaded holes in the fourth milling cutter blade 1-4, the center distance of two assembly holes in the first milling cutter blade 1-1, the second milling cutter blade 1-2 and the third milling cutter blade 1-3, the center distance of two assembly holes in the upper cover 2-1, the center distance of two assembly holes in the first through sleeve 3-1, the center distance of two assembly holes in the second through sleeve 3-2 and the center distance of two assembly holes in the third through sleeve 3-3 are all the same.
The bolt 2-2 penetrates through assembly holes on the upper cover 2-1, the first milling cutter blade 1-1, the first through sleeve 3-1, the second milling cutter blade 1-2, the second through sleeve 3-2, the third milling cutter blade 1-3 and the third through sleeve 3-3 from top to bottom and is tightened in a threaded hole of the fourth milling cutter blade 1-4,
the upper cover 2-1, the first milling blade 1-1, the first through sleeve 3-1, the second milling blade 1-2, the second through sleeve 3-2, the third milling blade 1-3, the third through sleeve 3-3 and the fourth milling blade 1-4 are assembled into a whole.
The end mill provided by the embodiment has the following manufacturing method:
A. cold-drawing the aluminum material into a long cylindrical through sleeve with an assembly hole, a central hole 3-6 and a lightening hole 3-5;
B. according to the process requirements, cutting the long cylindrical through sleeve into a plurality of short cylindrical through sleeves, namely forming a first through sleeve 3-1, a second through sleeve 3-2 and a third through sleeve 3-3;
C. according to the sequence of an upper cover 2-1, a first milling blade 1-1, a first through sleeve 3-1, a second milling blade 1-2, a second through sleeve 3-2, a third milling blade 1-3, a third through sleeve 3-3 and a fourth milling blade 1-4, placing all workpieces orderly, and ensuring that an assembly hole is coincident with the axis of a threaded hole;
D. an upper cover 2-1, a first milling cutter blade 1-1, a first through sleeve 3-1, a second milling cutter blade 1-2, a second through sleeve 3-2, a third milling cutter blade 1-3, a third through sleeve 3-3 and a fourth milling cutter blade 1-4 are fastened into an end milling cutter by using a bolt 2-2, wherein a screw part of the bolt 2-2 and a threaded hole form a thread pair.
The end milling cutter provided by the embodiment has no boss structure on all milling cutter sheets, so that the milling cutter blade does not need to be subjected to boss turning processing. And because the through sleeve is arranged between the milling blades, the distance between the milling blades is determined by the through sleeve and is not determined by the boss, when in manufacturing, the through sleeve is only required to be cut according to the set thickness (height), and then the upper cover, the milling blades and the through sleeve are fastened into a whole, so that the production efficiency is greatly improved, and the resources are saved.
The aluminum sleeve is weaker than the conventional boss in strength, but the aluminum sleeve is used for keeping a certain distance between the milling cutter blades and does not participate in cutting, so that the structural strength can still meet the requirement even under the condition of a central hole and a lightening hole.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to the embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention, the parts not specifically described or shown being exaggerated for clarity of presentation and for clarity of illustration in the prior art and not in any greater detail herein. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and features disclosed herein.
Claims (6)
1. An end mill comprises at least two milling cutter blades and an upper cover, wherein each milling cutter blade is provided with a cutter head; one of the milling cutter sheets is provided with two threaded holes, the upper cover and other milling cutter sheets are respectively provided with two assembling holes, the center distance of the assembling holes on the same milling cutter sheet is equal to the center distance of the threaded holes on the same milling cutter sheet, and the center distance of the assembling holes on the upper cover is also equal to the center distance of the threaded holes on the same milling cutter sheet; it is characterized in that the preparation method is characterized in that,
a through sleeve is arranged between the adjacent milling blades, and two assembling holes are also formed in the through sleeve;
the center distance of the assembling holes on the through sleeve is the same as that of the threaded holes on the milling cutter sheet;
the upper cover, the milling cutter blade with the assembly hole, the through sleeve and the milling cutter blade with the threaded hole are assembled into a whole by the bolt; the sleeve is made of aluminum;
the through sleeve is provided with a lightening hole; the through sleeve is provided with a central hole; the through sleeve is in a long cylindrical shape;
the number of the through sleeves is A, the number of the milling blades is B, and A is B-1.
2. The end mill according to claim 1, wherein the cartridge is 1 and the milling insert is 2.
3. The end mill according to claim 1, wherein the cartridge is 2 and the milling insert is 3.
4. The end mill according to claim 1, wherein the cartridge is 3 and the milling inserts are 4.
5. A method of manufacturing an end mill according to any one of claims 1-4, characterized by the steps of:
A. cold-drawing the aluminum material into a long cylindrical through sleeve with an assembly hole;
B. cutting the long cylindrical through sleeve into a plurality of short cylindrical through sleeves according to the process requirement;
C. arranging all workpieces orderly according to the sequence of the upper cover, the milling cutter blade with the assembly hole, the through sleeve and the milling cutter blade with the threaded hole, and ensuring that the assembly hole is coincident with the axis of the threaded hole;
D. and tightening the upper cover, the milling cutter blade with the assembly hole, the through sleeve and the milling cutter blade with the threaded hole into an end mill by using a bolt, wherein a screw rod part of the bolt and the threaded hole form a thread pair.
6. The method as claimed in claim 5, wherein if the number of the milling cutter blades is more than or equal to 3, the milling cutter blades with the holes to be threaded are arranged at the bottom, the upper cover is arranged at the top, the milling cutter blades with the assembly holes are arranged in the middle, and the milling cutter blades with the assembly holes are arranged in sequence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710038643.9A CN106808002B (en) | 2017-01-19 | 2017-01-19 | End milling cutter and manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710038643.9A CN106808002B (en) | 2017-01-19 | 2017-01-19 | End milling cutter and manufacturing method |
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| Publication Number | Publication Date |
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| CN106808002A CN106808002A (en) | 2017-06-09 |
| CN106808002B true CN106808002B (en) | 2020-03-03 |
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| CN201710038643.9A Active CN106808002B (en) | 2017-01-19 | 2017-01-19 | End milling cutter and manufacturing method |
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Citations (6)
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| CN203541666U (en) * | 2013-11-18 | 2014-04-16 | 四川成发航空科技股份有限公司 | Combined mill cutter for processing small lock plate of guide vane of aero-engine |
| CN203725861U (en) * | 2014-01-06 | 2014-07-23 | 厦门金鹭特种合金有限公司 | Combined cutting tool for processing paper honeycomb material |
| EP2818268A1 (en) * | 2013-06-26 | 2014-12-31 | VARGUS Ltd. | Cutting insert and a tool holder with a seat for cutting insert |
| CN204470678U (en) * | 2015-01-23 | 2015-07-15 | 哈尔滨汽轮机厂有限责任公司 | A kind of cutter block for milling bolt turret head |
| CN205414531U (en) * | 2016-03-09 | 2016-08-03 | 广东盛田科技有限公司 | Novel two saw bit milling cutter |
| CN206373415U (en) * | 2017-01-19 | 2017-08-04 | 张泽鹏 | A kind of new end mill(ing) cutter |
-
2017
- 2017-01-19 CN CN201710038643.9A patent/CN106808002B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2818268A1 (en) * | 2013-06-26 | 2014-12-31 | VARGUS Ltd. | Cutting insert and a tool holder with a seat for cutting insert |
| CN203541666U (en) * | 2013-11-18 | 2014-04-16 | 四川成发航空科技股份有限公司 | Combined mill cutter for processing small lock plate of guide vane of aero-engine |
| CN203725861U (en) * | 2014-01-06 | 2014-07-23 | 厦门金鹭特种合金有限公司 | Combined cutting tool for processing paper honeycomb material |
| CN204470678U (en) * | 2015-01-23 | 2015-07-15 | 哈尔滨汽轮机厂有限责任公司 | A kind of cutter block for milling bolt turret head |
| CN205414531U (en) * | 2016-03-09 | 2016-08-03 | 广东盛田科技有限公司 | Novel two saw bit milling cutter |
| CN206373415U (en) * | 2017-01-19 | 2017-08-04 | 张泽鹏 | A kind of new end mill(ing) cutter |
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| CN106808002A (en) | 2017-06-09 |
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