CN102441716A - 8TPI (Thread Per Inch) toothed thread formed cutting tool - Google Patents

8TPI (Thread Per Inch) toothed thread formed cutting tool Download PDF

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Publication number
CN102441716A
CN102441716A CN2011103245083A CN201110324508A CN102441716A CN 102441716 A CN102441716 A CN 102441716A CN 2011103245083 A CN2011103245083 A CN 2011103245083A CN 201110324508 A CN201110324508 A CN 201110324508A CN 102441716 A CN102441716 A CN 102441716A
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CN
China
Prior art keywords
cutter
8tpi
cutting face
angle
thread
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2011103245083A
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Chinese (zh)
Inventor
夏庆华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DAQING FUSITE TECHNOLOGY DEVELOPMENT Co Ltd
Original Assignee
DAQING FUSITE TECHNOLOGY DEVELOPMENT Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by DAQING FUSITE TECHNOLOGY DEVELOPMENT Co Ltd filed Critical DAQING FUSITE TECHNOLOGY DEVELOPMENT Co Ltd
Priority to CN2011103245083A priority Critical patent/CN102441716A/en
Publication of CN102441716A publication Critical patent/CN102441716A/en
Pending legal-status Critical Current

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Abstract

The invention provides an 8TPI (Thread Per Inch) toothed thread formed cutting tool which comprises a blank base, wherein a tooth top cutting surface is formed at the top of the blank base; a main cutting surface is formed above the tooth top cutting surface; and a secondary cutting surface and a side cutting surface are formed on two sides of the main cutting surface respectively. The 8TPI toothed thread formed cutting tool is characterized in that the blank base is in an equilateral triangle with the side length of 20.00-25.00mm; and the thickness of the blank base is 4.00-7.00mm. The 8TPI toothed thread formed cutting tool disclosed by the invention has the advantages as follows: firstly, due to the adoption of a special size of a cutter blank, special toothed threads can be processed on general pipes; secondly, the operation difficulty of a machine tool is reduced, so that the technique for the processing flow becomes simple and reliable and the processing precision can be ensured simultaneously; and thirdly, the heat generated by cutting the cutter can be effectively reduced, the durability of the cutter is enhanced, the processing finish is increased and the processing precision is ensured.

Description

A kind of thread forming cutting tool of 8TPI profile of tooth
Technical field
The present invention relates to the forming and cutting cutter of internal thread in a kind of oil pipe that is used for petroleum drilling and mining or the sleeve pipe jointing structure.
Background technology
Oil pipe and sleeve pipe are to require the degree of depth machinery converted products high, that consumption is big in the petroleum drilling and mining process.In the use of reality, be to adopt screw thread that single oil pipe or sleeve pipe are connected to become to reach thousands of rice, and can bear hundreds of atmospheric long strings, be equivalent to a tubulose high-pressure bottle.Can the technical performance that wherein, is threaded be the key that guarantee that the drilling process is safe and reliable.Conventional what use is the round thread and the buttress thread joint of API standard in China, but the disadvantage of this joint is: bonding strength is low, gas sealing ability is poor.Along with the harshness day by day and the oil-gas mining technology rapid development of oil, gas well drilling environment, common API modular connection can not have been satisfied existing engineering requirement.
Therefore, need to adopt the buttress thread of special tooth profile.Existing processing and forming cutter can only be processed common buttress thread.But for the buttress thread of special tooth profile, because the difference of profile of tooth lateral angles, when the angle that particularly carries side and screw thread vertical line was negative angle, processing required molding cutter just had different greatly with general machine-shaping cutter.
Summary of the invention
The purpose of this invention is to provide a kind of angle that can machining screw carries side and screw thread vertical line is the forming and cutting cutter of negative angle.
In order to achieve the above object; Technical scheme of the present invention has provided a kind of thread forming cutting tool of 8TPI profile of tooth, comprises the base base, is formed with the tooth top cutting face at the top of base base; Above the tooth top cutting face, be formed with main cutting face; The both sides of main cutting face are formed with secondary cutting face and side cutting face respectively, it is characterized in that: said base base is that the length of side is the equilateral triangle of 20.00~25.00 mm, and the thickness of said base base is 4.00~7.00mm.
Preferably, said main cutting face and cutter install the angle between the axis be 1 ° 30 '~1 ° 58 '.
Preferably, that the profile angle of angle and internal thread to be processed between the axis vertical line is installed is identical for said secondary cutting face and cutter.
Preferably, the angle between said secondary cutting face and the cutter installation axis vertical line is-2 °~-4 °.
Preferably, the relief angle of said main cutting face is 80 °~85 °, and the relief angle in said tooth top cutting face is 80 °~84 °.
 
Advantage of the present invention is: 1, adopt special cutter blank size, can on general general tubing, process the screw thread of special tooth profile;
2, that the angle of axis is installed is identical with the tapering of institute's machining screw for the main cutting face of cutter and cutter, and the design of this cutter has reduced the difficulty of machine operation, makes process technology simple, reliable, and the while can guarantee the precision of processing;
3, the relief angle in cutter major-minor cutting face is a particular design, and its effect is the specialized designs to the special tooth profile processing and forming, the selecting for use of this relief angle; Can effectively reduce the heat of cutter when cutting produces; Improve the durability of cutter, improve the fineness of processing simultaneously, guarantee machining accuracy.
Description of drawings
Fig. 1 is the overall schematic of the forming internal threads cutting tool of a kind of 8TPI profile of tooth provided by the invention;
Fig. 2 is the side view of Fig. 1;
Fig. 3 is the overall schematic of the external screw thread forming and cutting cutter of a kind of 8TPI profile of tooth provided by the invention;
Fig. 4 is the side view of Fig. 3.
The specific embodiment
For making the present invention more obviously understandable, now with a preferred embodiment, and conjunction with figs. elaborates as follows.
Extremely shown in Figure 4 like Fig. 1; The thread forming cutting tool is divided into forming internal threads cutting tool and external screw thread forming and cutting cutter; The general structure of two kinds of cutters is identical, comprises base base 4, is formed with tooth top cutting face 1 at the top of base base 4; Above tooth top cutting face 1, be formed with main cutting face 3, the both sides of main cutting face 3 are formed with secondary cutting face 2 and side cutting face 5 respectively.Different is, in like Fig. 1 and forming internal threads cutting tool shown in Figure 2, side cutting face 5 is positioned at the outer ledge place of base base 4; And in like Fig. 3 and external screw thread forming and cutting cutter shown in Figure 4, the place, inside edge that 5 in side cutting face is positioned at base base 4 simultaneously, the angle between main cutting face 3 and cutter installation axis direction again has nothing in common with each other.For these two kinds of cutters, other dimensional parameters all is identical, the existing detailed description as follows:
The base base size of general molding cutter all is the size form of standard; And thread forming cutting tool of the present invention is in order to satisfy the actual needs of processing, and the size of the base base 4 of cutter is a particular design, and it is shaped as equilateral triangle; The length on every limit is 20.00~25.00 mm mm; Thickness H is 4.00~7.00mm, and the installation form of cutter is vertically to install, and purpose is in order to adapt to the requirement of special processing.
General taper thread processing; The assurance of tapering is to be controlled by the delivering gear of stock-removing machine, and it doesn't matter with the making angle of Tool in Cutting face, and in the present invention; On main cutting face 3; And cutter is installed between the axis and is formed with an angle , its value be 1 ° 30 '~1 ° 58 ', the taper thread that adopts such Tool in Cutting to machine; Delivering gear to stock-removing machine requires low; Action is simple, and the single cutting output is big, and is highly polished.
In order to ensure processed profile of tooth accurately; Secondary cutting face 2 is installed the axis vertical line with cutter and is formed with an angle ; Angle is identical with the profile angle of internal thread to be processed; Be-2 °~-4 °; Under the cooperation of lathe feeding system, make the profile of tooth of processing and designing requirement identical.
The relief angle γ of main cutting face 3 is that 80 °~85 ° relief angle θ with tooth top cutting face 1 are 80 °~84 °.
In the forming and cutting process; For the workpiece fineness that guarantees to process; And the durability of cutter, just very important with the relief angle design of cutter for cutting, reasonably the back cutting angle can make cutter caloric value in working angles little; That cuts is highly polished, and can improve the cutting durability of cutter.In the present invention, the relief angle η of main cutting face 3 is 80 °~85 °, and the relief angle θ in tooth top cutting face 1 is 80 °~84 °.
The cutter that adopts this data creating to accomplish; The thread tooth precision that can guarantee processed moulding can be processed 20 workpiece to cutter for general carbon steel one, for special stainless steel within 0.01mm~0.05mm; A cutter can be processed 6~10 workpiece; And which kind of material no matter conventional process tool be, can only process 5~6 workpiece, for special stainless steel at 3 below the workpiece.

Claims (5)

1. the thread forming cutting tool of a 8TPI profile of tooth; Comprise base base (4); Be formed with tooth top cutting face (1) at the top of base base (4), be formed with main cutting face (3) in the top of tooth top cutting face (1), the both sides of main cutting face (3) are formed with secondary cutting face (2) and side cutting face (5) respectively; It is characterized in that: said base base (4) is the equilateral triangle of 20.00~25.00 mm for the length of side, and the thickness (H) of said base base (4) is 4.00~7.00mm.
2. the thread forming cutting tool of a kind of 8TPI profile of tooth as claimed in claim 1; It is characterized in that: said main cutting face (3) and cutter are installed between the axis and are formed angle ( ), angle ( ) be 1 ° 30 '~1 ° 58 '.
3. the thread forming cutting tool of a kind of 8TPI profile of tooth as claimed in claim 1; It is characterized in that: said secondary cutting face (2) and cutter are installed between the axis vertical line and are formed angle ( ), and angle ( ) is identical with the profile angle of internal thread to be processed.
4. the thread forming cutting tool of a kind of 8TPI profile of tooth as claimed in claim 1; It is characterized in that: said secondary cutting face (2) and cutter are installed between the axis vertical line and are formed angle ( ), and angle ( ) is-2 °~-4 °.
5. the thread forming cutting tool of a kind of 8TPI profile of tooth as claimed in claim 1 is characterized in that: the relief angle (η) of said main cutting face (3) is 80 °~85 °, and the relief angle (θ) in said tooth top cutting face (1) is 80 °~84 °.
CN2011103245083A 2011-10-24 2011-10-24 8TPI (Thread Per Inch) toothed thread formed cutting tool Pending CN102441716A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011103245083A CN102441716A (en) 2011-10-24 2011-10-24 8TPI (Thread Per Inch) toothed thread formed cutting tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011103245083A CN102441716A (en) 2011-10-24 2011-10-24 8TPI (Thread Per Inch) toothed thread formed cutting tool

Publications (1)

Publication Number Publication Date
CN102441716A true CN102441716A (en) 2012-05-09

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Country Status (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103551681A (en) * 2013-11-05 2014-02-05 无锡雨田精密工具有限公司 Special-shaped screwer
CN103639545A (en) * 2013-11-28 2014-03-19 昆山华辰精密工具有限公司 Hard alloy thread machining blade

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102275017A (en) * 2011-07-21 2011-12-14 大庆福斯特科技开发有限公司 Cutting tool for shaping external threads of hermetically-sealed threaded connector
CN202411585U (en) * 2011-10-24 2012-09-05 大庆福斯特科技开发有限公司 Forming and cutting cutter for threads with 8TPI (threads per inch) tooth profile

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102275017A (en) * 2011-07-21 2011-12-14 大庆福斯特科技开发有限公司 Cutting tool for shaping external threads of hermetically-sealed threaded connector
CN202411585U (en) * 2011-10-24 2012-09-05 大庆福斯特科技开发有限公司 Forming and cutting cutter for threads with 8TPI (threads per inch) tooth profile

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103551681A (en) * 2013-11-05 2014-02-05 无锡雨田精密工具有限公司 Special-shaped screwer
CN103639545A (en) * 2013-11-28 2014-03-19 昆山华辰精密工具有限公司 Hard alloy thread machining blade

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Application publication date: 20120509