CN105643025B - Cutting blade for machining screw thread and its processing method - Google Patents
Cutting blade for machining screw thread and its processing method Download PDFInfo
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- CN105643025B CN105643025B CN201510678612.0A CN201510678612A CN105643025B CN 105643025 B CN105643025 B CN 105643025B CN 201510678612 A CN201510678612 A CN 201510678612A CN 105643025 B CN105643025 B CN 105643025B
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- 238000005520 cutting process Methods 0.000 title claims abstract description 54
- 238000003754 machining Methods 0.000 title claims abstract description 20
- 238000003672 processing method Methods 0.000 title abstract description 8
- 238000004519 manufacturing process Methods 0.000 claims 2
- 238000000034 method Methods 0.000 abstract description 14
- 230000006835 compression Effects 0.000 abstract description 7
- 238000007906 compression Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 7
- 238000007514 turning Methods 0.000 abstract description 6
- 241000469816 Varus Species 0.000 abstract description 3
- 230000002452 interceptive effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 15
- 238000005516 engineering process Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 239000003082 abrasive agent Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005459 micromachining Methods 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
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Abstract
Invention is related to field of mechanical technique, refers to a kind of processing blades, especially a kind of Cutting blade for machining screw thread and its processing method.It includes blade body, the blade body chip side is arranged in order the chasing blade for cutted thread equipped with several, it is equipped on front side of the chasing blade and cuts deburring cutter, it includes the compression lateral incision deburring cutter sword being arranged in front end that this, which cuts deburring cutter, and can play the stretching lateral incision deburring cutter sword for eliminating burr after being connected to compression lateral incision deburring cutter sword.The advantages of invention, is：The burr that cutted thread occurs can be avoided completely by the gang tool；Lateral incision deburring cutter sword is compressed, and is connected to the stretching lateral incision deburring cutter sword after compression lateral incision deburring cutter sword and is able to that the case where " turning up " and " varus " turning is occurred into burr；The relationship of each angle can realize that cutter is integrally-built rationally, prevent tool sharpening the problems such as interfering of appearance in the process occur.
Description
Technical field
Invention is related to field of mechanical technique, refers to a kind of processing blades, especially a kind of Cutting blade for machining screw thread and its processing side
Method.
Background technology
Screw thread is the spiral yarn shaped continuous lug boss with particular cross section made on cylinder or circular cone parent surface
Point.Screw thread is divided into cylindrical thread and tapered tread by its parent shape；It is divided into external screw thread, interior spiral shell in parent present position by it
Line is divided into triangle thread, rectangular thread, trapezoidal thread, saw-tooth thread and other special forms by its cross sectional shape (tooth form)
Shape screw thread.The reasons such as the plasticity of deformation and chip in machining area when existing screw thread process is based on metal cutting process,
After making fillet surface and screw chasing processing successively, the fillet surface at its beginning and screw thread intersection will appear burr (see Fig. 1)；The hair
The severity of thorn and the angle being cut between the plasticity of metal, the cutting angle of screw tool, thread tooth face and fillet surface
And Cutting Process parameter etc. is related.
In the prior art, the method for most widely used removal screw thread beginning burr is polishing method, that is, uses abrasive material class
Or the equipment of soft material class makees the method polished to burr, but its that there are efficiency is low, the deficiencies of being difficult to accurately control polishing position.With
Afterwards, produce after screw chasing again that fillet surface makees the process of micro cutting to its beginning, not by its cutting feed
Same mode is divided into walking the skill in using a kitchen knife in cookery (see Fig. 2) and leans on the skill in using a kitchen knife in cookery again (see Fig. 3)；But the two, which has, makes burr by original " turning up "
The problem of switching to " varus " (see Fig. 4).More efficient mode is that screwer and burring knife are mounted on same knife bar at present
Upper (see Fig. 9-1 and 9-2), flash removed is removed after processing screw thread with the burring knife on same knife bar again.In theory, spiral shell
The relative position of line knife and burring knife is determining, but in a practical situation, error, knife is there will necessarily be in cutter fixation procedure
Situations such as being easy to fall into sundries in bar gap must cause the deviation of burring knife, often be needed before deburring again to knife.
In short, screw thread beginning burr is one to be widely present, urgently have the old problem of more preferable technology solution.No matter
It is " walking the skill in using a kitchen knife in cookery " or " leaning on the skill in using a kitchen knife in cookery ", or screwer and burring knife is installed respectively on same knife bar, it cannot be very
Compactly complete the process of deburring, inefficiency cumbersome to knife process.
Invention content
The purpose of invention is in view of the above-mentioned problems, a kind of raising precision is provided, it is not necessary that knife, spiral shell repeatedly is completed with it
After line cutting, be transferred to immediately to making micro machining at screw thread beginning burr, enable the screw thread burr at this be refined and
It rapidly cuts off, can be not only used for screw cutting and can be used for cutting off the burr blade at screw thread beginning fillet surface.
In order to achieve the above objectives, invention uses following technical proposal：A kind of Cutting blade for machining screw thread, including blade body,
It is characterized in that, the cutting edge side of the blade body is equipped with chasing knife, it is additionally provided with before the chasing knife and cuts burr
Knife, it includes the compressed side deburring cutter that the burr that the chasing tooth form in front end bears compressive load side is arranged to cut deburring cutter
Sword, and can be used for the tensile side hair that chasing tooth form bears the burr of tensile load side after being connected to the compressed side burr blade
Bayonet sword.
In a kind of above-mentioned Cutting blade for machining screw thread, the angle of the screw thread beginning fillet surface and the axis of thread is α, spiral shell
The angle formed between the tooth form side for bearing compressive load side of line tooth form and the perpendicular plane the two of the axis of thread be β 1,
The angle formed between the tooth form side for bearing tensile load side of thread tooth and the perpendicular plane the two of the axis of thread is β
2, the angle formed between compressed side burr blade and tensile side burr blade and the vertical plane of the axis of thread is respectively δ 1, δ 2；
Relationship between the angle is：1 < δ of β, 1 < (90 ° of-α), 90 ° of 2 < δ of β, 2 <.
In a kind of above-mentioned Cutting blade for machining screw thread, the radial height point of tensile side burr blade and adjacent chasing knife
Both point of a knife vertex of sword form angle theta, and θ >=α between line and horizontal line.
In a kind of above-mentioned Cutting blade for machining screw thread, the radial direction of the compressed side burr blade and tensile side burr blade
Height k >=0.1mm.
In a kind of above-mentioned Cutting blade for machining screw thread, when its be used to cut V-arrangement class tooth form screw thread and its beginning fillet surface it
When screw thread burr, the angle ω between the walked track of deburring cutter and axis of thread the two is cut, and (+15 ° of ξ) < ω≤(α -3 °), ξ are
Lead angle.
In a kind of above-mentioned Cutting blade for machining screw thread, when its be used to cut T shapes class tooth form screw thread and its beginning fillet surface it
When screw thread burr, between the lead angle ξ of the tapered tread, its walked track of compressed side burr blade and axis of thread the two
Angle ω 2, the angle ω 1 between the walked track of tensile side burr blade and axis of thread the two, and (+10 ° of ξ) < ω 2≤(α-
2 °), ξ < ω 1≤(α -2 °).
Another object of the present invention is in view of the above-mentioned problems, providing a kind of processing method using the cutter.
A, using roughing tool complete screw thread at outer circle it is rough turn, the exterior angle at the beginning of falling screw thread, make screw thread beginning outer chamfer face with
The angle of the axis of thread is α；
B, the Cutting blade for machining screw thread described in any one described in claim 1 to 6, cutted thread are used instead；According to screw thread
Beginning fillet surface and the angle α of its axis, the lead angle ξ of tapered tread, thread tooth compressed side tooth form half angle β 1, thread
Shape tensile side tooth form half angle β 2 determines that corresponding tensile side burr blade and compressed side burr blade are vertical with the axis of thread flat
Angle δ 1, δ 2 between face and angle theta；
C, it is drawn without changing cutter spacing, with being set to the burr blade alignment thread tooth of cutting before the thread blade of same blade
Stretch the burr that screw thread is cut off at the burr of side and compressed side, along oblique angle ω or ω 1 and ω 2.
Compared with prior art, it is the advantages of invention：The gang tool can by turning again by way of remove
Burr lack of standardization is completely fixed the position relationship of burring knife and screwer by the way that burring knife and screwer integrally combine,
Being accurately positioned for deburring track is realized by modification and processing program parameter, is completely eliminated existing for burring knife and upper bottom knife
Form and position error, at the same eliminate burring knife to knife process, simplify operating procedure；By the way that compression lateral incision deburring cutter is rationally arranged
Sword, and it is connected to the stretching lateral incision deburring cutter sword after compression lateral incision deburring cutter sword, removal " turning up " and " varus " is corresponded to respectively
Burr；Meanwhile it can realize that the rational overall structure of cutter, prevention occur during tool sharpening by the relationship of each angle
The problems such as interfering of appearance.
Description of the drawings
It, below will be to embodiment or existing in order to illustrate more clearly of inventive embodiments or technical solution in the prior art
Attached drawing is briefly described needed in technology description, it should be apparent that, the accompanying drawings in the following description is only to invent
Some embodiments for those of ordinary skill in the art without having to pay creative labor, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1-1 is after first processing screw thread beginning fillet surface, again screw cutting, and screw thread beginning fillet surface intersects place with screw thread
" turning up " burr pattern schematic diagram presented is V-type tooth configuration.Fig. 1-2 is the profile angle pattern schematic diagram of T-type tooth.
Fig. 2 is to make feed cutting, to the fillet surface of Fig. 1 to cut off the processing method schematic diagram of its burr that " turns up ".
Fig. 3 is to make the fillet surface of Fig. 1 by knife cutting, to cut off the processing method schematic diagram of its burr that " turns up ".
Fig. 4 is after being processed to fillet surface by Fig. 2 and Fig. 3, and screw thread beginning fillet surface intersects the " interior of place presentation with screw thread
Turn over " burr pattern schematic diagram.
Fig. 5-1 is the screw thread for processing V-arrangement class tooth form screw thread (the V-arrangement tooth form containing sharp bottom and round bottom and zigzag tooth form)
The pattern schematic diagram of blade；Fig. 5-2 be for process T shape class tooth forms screw thread (tooth form of shape containing T, it is partially trapezoidal toothed and with flat saw
Tooth form tooth form) threaded blade pattern schematic diagram.
Fig. 6-1 is the workpiece for V-arrangement class tooth form screw thread (the V-arrangement tooth form containing sharp bottom and round bottom and zigzag tooth form),
The schematic diagram of chasing processing；Fig. 6-2 be chasing after, its cut burr processing schematic diagram.
Fig. 7-1 is the work for T shape class tooth forms screw thread (tooth form of shape containing T, partially trapezoidal toothed and flat zigzag tooth form)
Part, the schematic diagram of chasing processing；Fig. 7-2 be chasing after, its cut tensile side burr processing schematic diagram；Fig. 7-3 is to cut
After screw thread, its cut compressed side burr processing schematic diagram.
Fig. 8-1 be API round threads tube body screw thread beginning fillet surface at, the pattern schematic diagram after cutting off burr；Fig. 8-2 is
At the tube body screw thread beginning fillet surface of API buttress threads, the pattern schematic diagram after cutting off burr.
Fig. 9-1 and 9-2 is the schematic diagram that chasing knife and burring knife are provided separately cutting in the prior art.
Specific implementation mode
Below in conjunction with the attached drawing in inventive embodiments, the technical solution in inventive embodiments is carried out clearly and completely
Description, it is clear that described embodiment is only invention a part of the embodiment, instead of all the embodiments.Based in invention
Embodiment, the every other embodiment that those of ordinary skill in the art are obtained without creative efforts,
Belong to the range of invention protection.
Embodiment one
As shown in Fig. 5-1, Fig. 5-2, Fig. 6-1, Fig. 6-2, a kind of Cutting blade for machining screw thread, including blade body 1, the knife
The cutting edge side of piece ontology is equipped with chasing knife 2, is additionally provided with before the chasing knife and cuts deburring cutter 5, cutting deburring cutter includes
The compressed side burr blade 3 that chasing tooth form in front end bears the burr of compressive load side is set, and is connected to the compression
The tensile side burr blade 4 that chasing tooth form bears the burr of tensile load side can be used for after the burr blade of side.
The angle of the screw thread beginning fillet surface and the axis of thread is α, and thread tooth bears compressive load side
The angle formed between tooth form side and the perpendicular plane the two of the axis of thread is β 1, thread tooth bears tensile load side
Tooth form side and the perpendicular plane the two of the axis of thread between the angle that is formed be β 2, compressed side burr blade and tensile side hair
The angle formed between bayonet sword and the vertical plane of the axis of thread is respectively δ 1, δ 2；Relationship between the angle is：1 < δ 1 of β
< (90 ° of-α), 90 ° of 2 < δ of β, 2 <.
Both the radial height point of tensile side burr blade and the adjacent point of a knife vertex of chasing blade line and level
Angle theta, and θ >=α are formed between line；Radial height k >=0.1mm of the compressed side burr blade and tensile side burr blade.
When it is used to cut the screw thread burr of V-arrangement class tooth form screw thread and its beginning fillet surface, the tapered tread it
Lead angle ξ, angle ω between the walked track of deburring cutter and axis of thread the two, and (+15 ° of ξ) < ω≤(α -3 °) are cut；When it
When screw thread burr for cutting T shapes class tooth form screw thread and its beginning fillet surface, the lead angle ξ of the tapered tread, its
Angle ω 1, the walked track of tensile side burr blade between the walked track of compressed side burr blade and axis of thread the two and screw thread
Angle ω 2 between axis the two, and (+10 ° of ξ) < ω 1≤(α -2 °), ξ < ω 2≤(α -2 °).
Using the processing method of the cutter：
A, using roughing tool complete screw thread at outer circle it is rough turn, the exterior angle at the beginning of falling screw thread, the screw thread beginning outer chamfer face with
The angle of the axis of thread is α；
B, the screwer of this patent, then cutted thread are used instead；
C, it is directed at thread tooth without changing cutter spacing, with being set to the burr blade of cutting before the chasing blade of same blade
Spiral shell is cut off at the burr of compressed side and tensile side, along oblique angle ω (V-arrangement class tooth form screw thread) or ω 1 and ω 2 (T shape class tooth forms screw thread)
The burr of line.
The tube body screw thread (belonging to V-arrangement class tooth form screw thread) of API round thread tubing and casings, in the direct Combined screw using the present invention
Line cutter (such as Fig. 5-1 shows) make screw chasing (such as Fig. 6-1 shows) afterwards, its screw thread and beginning fillet surface intersection there is the burr that turns up
(such as Fig. 1 shows) and then varies without cutter spacing, with being set to cutting deburring cutter while being aligned before the chasing blade of same blade
Make screw thread burr cutting (such as Fig. 6-2 shows) at the burr of thread tooth tensile side and compressed side, cuts the cutting parts after burr
Pattern such as Fig. 8-1 shows.
Such as, screw thread beginning fillet surface and the angle α of its axis are 30 °, cut the drift angle δ of compressed side burr blade1For 52 °,
Cut the drift angle δ of tensile side burr blade2It it is 78 °, the oblique angle ω for cutting burr track is 24 ° 7 ' 5 ".
Embodiment two
The cutting edge side of a kind of Cutting blade for machining screw thread, including blade body 1, the blade body is equipped with chasing knife 2,
It is additionally provided with before the chasing knife and cuts deburring cutter 5, it includes that the chasing tooth form being arranged in front end bears to compress to cut deburring cutter
The compressed side burr blade 3 of the burr of load side, and be connected to after the compressed side burr blade and can be used for chasing tooth form and hold
The tensile side burr blade 4 of the burr of Tensile load side.
The angle of the screw thread beginning fillet surface and the axis of thread is α, and thread tooth bears compressive load side
The angle formed between tooth form side and the perpendicular plane the two of the axis of thread is β 1, thread tooth bears tensile load side
Tooth form side and the perpendicular plane the two of the axis of thread between the angle that is formed be β 2, compressed side burr blade and tensile side hair
The angle formed between bayonet sword and the vertical plane of the axis of thread is respectively δ 1, δ 2；Relationship between the angle is：1 < δ 1 of β
< (90 ° of-α), 90 ° of 2 < δ of β, 2 <.
Both the radial height point of tensile side burr blade and the adjacent point of a knife vertex of chasing blade line and level
Angle theta, and θ >=α are formed between line；Radial height k >=0.1mm of the compressed side burr blade and tensile side burr blade.
When it is used to cut the screw thread burr of V-arrangement class tooth form screw thread and its beginning fillet surface, the tapered tread it
Lead angle ξ, angle ω between the walked track of deburring cutter and axis of thread the two, and (+15 ° of ξ) < ω≤(α -3 °) are cut；When it
When screw thread burr for cutting T shapes class tooth form screw thread and its beginning fillet surface, the lead angle ξ of the tapered tread, its
Angle ω 1, the walked track of tensile side burr blade between the walked track of compressed side burr blade and axis of thread the two and screw thread
Angle ω 2 between axis the two, and (+10 ° of ξ) < ω 1≤(α -2 °), ξ < ω 2≤(α -2 °).
Using the processing method of the cutter：
A, using roughing tool complete screw thread at outer circle it is rough turn, the exterior angle at the beginning of falling screw thread, the screw thread beginning outer chamfer face with
The angle of the axis of thread is α；
B, the screwer of this patent is used instead, first according to the angle α of screw thread beginning fillet surface and its axis, the spiral shell of tapered tread
Line lift angle ξ, thread tooth compressed side tooth form half-angle δ 1, thread tooth tensile side tooth form half-angle δ 2 angularly, determine corresponding pressure
Angle δ 1, δ 2 between contracting side burr blade and tensile side burr blade and the vertical plane of the axis of thread and tensile side burr blade
Radial height point and both most adjacent point of a knife vertex of chasing blade angle theta between line and horizontal line, then cutted thread；
C, it is directed at thread tooth without changing cutter spacing, with being set to the burr blade of cutting before the chasing blade of same blade
Spiral shell is cut off at the burr of compressed side and tensile side, along oblique angle ω (V-arrangement class tooth form screw thread) or ω 1 and ω 2 (T shape class tooth forms screw thread)
The burr of line.
As shown in Fig. 7-1, Fig. 7-2, Fig. 7-3, the tube body screw thread of API trapezoidal thread casing is using the straight of the present invention
Connect Combined screw thread cutter make screw chasing after, its screw thread and beginning fillet surface intersection there is the burr that turns up, be and then not required to
Change cutter spacing, be respectively aligned to thread tooth tensile side and compression with being set to the burr blade of cutting before the thread blade of same blade
Make the cutting of screw thread burr at the burr of side, cuts cutting parts pattern such as Fig. 8-2 after burr and show.
At this point, screw thread beginning fillet surface and the angle α of its axis are 30 °, the drift angle δ of compressed side burr blade is cut1It is 37 °
30 ', it cuts the oblique angle ω of burr track1It is 26 ° 32 ' 36 ", cut the drift angle δ of tensile side burr blade2For 59 °, its cut burr rail
The oblique angle ω of mark2It it is 27 ° 34 ' 22 ".
The foregoing is merely the preferred embodiments of invention, are not invented to limit, all spirit and original in invention
Within then, any modification, equivalent replacement, improvement and so on should be included within the protection domain of invention.
Claims (6)
1. a kind of Cutting blade for machining screw thread, including blade body, which is characterized in that the cutting edge side of the blade body is equipped with and cuts
Screwer is additionally provided with before the chasing knife and cuts deburring cutter, and it includes that the chasing tooth form being arranged in front end is held to cut deburring cutter
The compressed side burr blade of the burr of compressed load side, and can be used for chasing tooth after being connected to the compressed side burr blade
Shape bears the tensile side burr blade of the burr of tensile load side；
The angle of the screw thread beginning fillet surface and the axis of thread is α, the tooth form for bearing compressive load side of thread tooth
The angle formed between side and the perpendicular plane the two of the axis of thread is β 1, the tooth for bearing tensile load side of thread tooth
The angle formed between shape side and the perpendicular plane the two of the axis of thread is β 2, compressed side burr blade and tensile side deburring cutter
The angle formed between sword and the vertical plane of the axis of thread is respectively δ 2, δ 1；Relationship between the angle is：1 < δ of β, 1 <
The cutting depth of (90 ° of-α), 90 ° of 2 < δ of β, 2 <, the compressed side burr blade and tensile side burr blade is k, and k >=
0.1mm。
2. Cutting blade for machining screw thread according to claim 1, which is characterized in that the compressed side burr blade and tensile side
The interface point of burr blade, to cutting depth horizontal line and veritcal linearity at intersection point and adjacent chasing blade point of a knife
Angle theta, and θ >=α are formed between line and horizontal line that both vertex are linked to be.
3. Cutting blade for machining screw thread according to claim 1, which is characterized in that when its be used to cut V-arrangement class tooth form screw thread and
When the screw thread burr of screw thread beginning fillet surface, the angle ω between the walked track of deburring cutter and axis of thread the two, and (+15 ° of ξ) are cut
< ω≤(α -3 °)；ξ is lead angle.
4. Cutting blade for machining screw thread according to claim 3, which is characterized in that when its be used to cut T shapes class tooth form screw thread and
When the screw thread burr of screw thread beginning fillet surface, the lead angle ξ, its walked track of compressed side burr blade and the axis of thread
Angle ω 1, the walked track of tensile side burr blade between the two and the angle ω 2 between axis of thread the two, and (+10 ° of ξ) < ω
1≤(α -2 °), ξ < ω 2≤(α -2 °).
5. with the Cutting blade for machining screw thread manufacturing procedure described in any one described in Claims 1-4, which is characterized in that including
Following steps：
A, rough turn using outer circle at roughing tool completion screw thread, the exterior angle at the beginning of falling screw thread makes screw thread beginning outer chamfer face and screw thread
The angle of axis is α；
B, the Cutting blade for machining screw thread described in any one described in claim 1 to 4, cutted thread are used instead；
C, it is directed at thread tooth compressed side without changing cutter spacing, with being set to the burr blade of cutting before the thread blade of same blade
With the burr for cutting off screw thread at the burr of tensile side, along oblique angle ω or ω 1 and ω 2.
6. manufacturing procedure according to claim 5, which is characterized in that in the step b, according to screw thread beginning fillet surface
With the angle α of its axis, the lead angle ξ of tapered tread, thread tooth compressed side tooth form half angle β 1, thread tooth tensile side tooth
Shape half angle β 2 determines the angle between corresponding tensile side burr blade and compressed side burr blade and the vertical plane of the axis of thread
δ 1, δ 2 and angle theta.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510678612.0A CN105643025B (en) | 2015-10-20 | 2015-10-20 | Cutting blade for machining screw thread and its processing method |
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| CN201510678612.0A CN105643025B (en) | 2015-10-20 | 2015-10-20 | Cutting blade for machining screw thread and its processing method |
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| CN105643025B true CN105643025B (en) | 2018-11-13 |
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| CN110711909B (en) * | 2019-10-09 | 2021-05-28 | 北部湾大学 | A method for removing burrs or burrs in the starting section of a workpiece thread by a CNC lathe |
| CN111531234B (en) * | 2020-05-11 | 2022-11-04 | 成都航利航空科技有限责任公司 | Method for removing burrs of head and tail threads by numerical control lathe |
| CN113084271B (en) * | 2021-04-09 | 2023-03-14 | 贵州黎阳国际制造有限公司 | Sawtooth thread machining method |
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| CN2306859Y (en) * | 1997-12-30 | 1999-02-10 | 宝山钢铁(集团)公司 | Multifunctional blade for removing rag |
| CN2517534Y (en) * | 2001-12-28 | 2002-10-23 | 宝山钢铁股份有限公司 | Cutter for working internal thread of oil sleeve joint hoop |
| JP4765533B2 (en) * | 2005-10-12 | 2011-09-07 | 株式会社デンソー | Thread cutting tool and thread processing device |
| CN201147850Y (en) * | 2008-01-20 | 2008-11-12 | 中国石化集团胜利石油管理局井下作业公司 | Tool bit for processing workpiece outside screw |
| CN201516525U (en) * | 2009-08-14 | 2010-06-30 | 中国石油集团渤海石油装备制造有限公司 | Combined screw thread process knife |
| CN102126028B (en) * | 2011-03-11 | 2012-11-21 | 烟台宝钢钢管有限责任公司 | Machining method and machining equipment of angle of outer bevel of API casing thread |
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Address after: 325000 No. 100, Yucang East Road, Puzhou street, Longwan District, Wenzhou City, Zhejiang Province Patentee after: Wenzhou Tianyi precision tools Co.,Ltd. Address before: No. 100, East Yucang Road, Longwan Economic Development Zone, Wenzhou, Zhejiang 325011 Patentee before: WENZHOU TIANYI STEEL PLASTIC MACHINERY PLANT |