CN105715215A - Connection thread between drilling tool systems of blasthole drill - Google Patents
Connection thread between drilling tool systems of blasthole drill Download PDFInfo
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- CN105715215A CN105715215A CN201410718918.XA CN201410718918A CN105715215A CN 105715215 A CN105715215 A CN 105715215A CN 201410718918 A CN201410718918 A CN 201410718918A CN 105715215 A CN105715215 A CN 105715215A
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- thread
- screw thread
- joint screw
- drilling system
- path
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Abstract
The invention relates to a connection thread between drilling tool systems of a blasthole drill, and aims to solve the problem of processing of special inch tapered threads of an existing slender-shaft drilling rod: a lengthened lathe with a tilted profiling device is used for processing the thread, and the thread is required to be checked with a special thread ring or feeler gauge, but a general numeric control machine tool cannot be used for processing the thread, so that a certain difficulty in the processing of the thread and inconvenience in user maintenance are caused. The connection thread between the drilling tool systems of the blasthole drill comprises internal and external threads. The connection thread adopts a cylindrical single-line rectangular thread for connection, only has a large diameter and a small diameter without a medium diameter, and is a concave-convex straight tooth with a rectangular axial section taking a tooth shape; the tooth side surface of the connection thread is a working engagement sliding face with a smooth surface; the connection thread adopts small-diameter centered clearance fit. The processing bottleneck of the slender-shaft drilling rod is solved; furthermore, the production period is shortened, and the manufacturing cost is reduced; the precision of the rectangular straight tooth shape is easy to guarantee.
Description
Technical field
The present invention relates to the nipple between a kind of rotary drill drilling system, be mainly used in the joint screw thread between rotary drill drilling system and couple, it is also possible to the joint screw thread between drilling system couples on rock drilling machinery.
Background technology
As shown in Figure 1, between the drilling system that the rotary drill in the existing mine of China uses, joint screw thread is special tapered tread made in Great Britain, this drilling system in working order under be followed successively by from top to bottom the quill shaft of rotary machinery, amortisseur, drilling rod group, virtual calibrator for instrument transformer and drill bit composition, being coupled to each other between them is special tapered tread made in Great Britain, it is to say, the one end being coupled to each other between them is special conical inner screw thread made in Great Britain or external screw thread；Processing this screw thread needs band to lean to the horizontal lathe processing of die device, and is processed with special thread ring, feeler gauge etc. and checks.And generally numerical-control horizontal lathe all can not process this screw thread, thus bringing certain difficulty to the processing of this screw thread, the particularly processing of the special tapered tread made in Great Britain of slender axles drilling rod；Thus safeguarding to user and bringing inconvenience, and add maintenance and spare parts cost.
Summary of the invention
It is an object of the invention to provide a kind of and special tapered tread made in Great Britain and have equal linking intensity, the joint screw thread between the rotary drill drilling system of maintenance, long service life is checked conveniently, is easy to simple in construction in-process measurement；Propose a kind of by the tapered tread connection special made in Great Britain of joint between drilling system, adopt a kind of new cylinder single line rectangular thread to couple form.
Joint screw thread between the rotary drill drilling system that technical solution of the present invention relates to includes inside and outside cylindrical thread, and described screw thread adopts cylinder single line rectangular thread, and single thread self-locking property is good；Described cylindrical thread is to rise to winding screw along cylinder axis by a constant pitch, the concavo-convex straight line tooth that axial cross section thread form is rectangular；The flank of described screw thread is that ganoid work screws sliding surface；Described joint screw thread only has big footpath and path not to have central diameter；Described joint screw thread includes dental groove well width, crest footpath thick, big, path, thread depth H, described joint screw thread path is that big footpath deducts two thread depths, for ensureing that this screw thread is threaded into smooth and easy and inlet screw intensity when rotary drill drilling tool extension bar, screw thread arrival end is provided with and is threaded into pilot angle β, it is threaded into pilot angle β length C equal to 0.25 times of pitch P, technique withdrawing length；The crest thickness F of described female thread and the dental groove well width W of described externally threaded crest thickness f and described female thread and described externally threaded dental groove well width w is 0.5 times of pitch P, described thread depth H span is between (0.25～0.5) times pitch P, cooperation between female thread and the external screw thread of described joint screw thread, big footpath or the matched in clearance of path centering can be adopted, the dental groove groove of described female thread and crest thickness screw mutually with described externally threaded crest thickness and dental groove groove respectively, closely linked, screw all linked with one anotherly, and engage securely.
The further technical scheme of the present invention is: described in be threaded into the span of pilot angle β between (30 °～60 °).
The present invention further technical scheme is: described in be threaded into pilot angle β and be preferably 45 °.
The further technical scheme of the present invention is: the dental groove well width W and described externally threaded dental groove well width w of described female thread, suitable dental groove well width tolerance value can form certain running clearance, running clearance is to ensure that rotary drill drilling tool threaded engagement in bar process of unloading is smooth and easy, engage securely during work, it allows manufacturing tolerance between+0.05～+0.1, and unit is millimeter.
The further technical scheme of the present invention is: the thread depth H of described joint screw thread is preferably 0.25 times of pitch P, so to solve, joint screw thread height between drilling system is bigger, dissection to drilling system material body, reduce " incised wound " that drilling system bulk material is bigger, improve screw thread connection strength and reduce the wall thickness of material, reducing cost；The tolerance value of suitable thread depth can form certain tooth top gap and with storing lubricating grease and hold dust, and to improve the working performance of drilling tool and to reduce thread abrasion, it allows manufacturing tolerance between+0.2～+0.3, and unit is millimeter.
The further technical scheme of the present invention is: the cooperation between female thread and the external screw thread of described joint screw thread, it is preferred to the matched in clearance of path centering, and it coordinates can be optionally one of following, H7/f7, H7/g6, H8/f7, H8/g6, H8/h7.
The present invention further technical scheme is: the matched in clearance of described path centering, it is preferred to H7/f7.
The invention has the beneficial effects as follows: because this rectangular thread straight line thread form simply easily obtains degree of precision and interchangeability, in-process measurement inspection is convenient, long service life, after rotary drill drilling tool uses a period of time, screw thread has abrasion in various degree, deformation, utilizes general horizontal lathe just it can be processed or repair；Solve special tapered tread processing bottleneck made in Great Britain, and shorten the production cycle, reduce and manufacture and maintenance cost.
Accompanying drawing explanation
Between Fig. 1 prior art drilling system, special tapered tread made in Great Britain couples schematic diagram
Between the drilling system of Fig. 2 present invention, cylinder single line rectangular thread couples schematic diagram
Cylinder single line rectangle female thread schematic diagram between the drilling system of Fig. 3 present invention
Cylinder single line rectangle external screw thread schematic diagram between the drilling system of Fig. 4 present invention
Detailed description of the invention
As in figure 2 it is shown, the cylinder single line rectangular thread of the present invention includes cylinder single line rectangle female thread 1 and cylinder single line rectangle external screw thread 2, described screw thread adopts cylinder single line rectangular thread, and single thread self-locking property is good；Described cylindrical thread is to rise to winding screw along cylinder axis by a constant pitch, the concavo-convex straight line tooth that axial cross section thread form is rectangular；The flank of described screw thread is that ganoid work screws sliding surface；Described joint screw thread only has big footpath and path not to have central diameter, the dental groove groove W and crest thickness F of described cylinder single line rectangle female thread 1 screws mutually with the crest thickness f and dental groove groove w of described cylinder single line rectangle external screw thread 2 respectively, closely linked, all linked with one another, and firmly screw.
As shown in Figure 3, described cylinder single line rectangle female thread 1, including dental groove well width W, crest thickness F, big footpath D, path d, thread depth H, described path d is that big footpath D deducts two thread depth H, for ensureing that this screw thread is threaded into smooth and easy and inlet screw intensity when rotary drill drilling tool extension bar, screw thread arrival end is provided with and is threaded into pilot angle β, described in be threaded into pilot angle β length C equal to 0.25 times of pitch P, technique withdrawing length E.
As shown in Figure 4, described cylinder single line rectangle external screw thread 2, including dental groove well width w, crest thickness f, big footpath D, path d, thread depth H, described path d is that big footpath D deducts two thread depth H, smooth and easy for ensureing that this screw thread is threaded into when rotary drill drilling tool extension bar, screw thread arrival end is provided with and is threaded into pilot angle β, the described pilot angle β length C that is threaded into is equal to 0.25 times of pitch P, technique withdrawing length e, cooperation between female thread 1 and the external screw thread 2 of described joint screw thread, can adopt the matched in clearance of big footpath D or path d centering.
The dental groove well width W of the crest thickness F of described female thread 1 and the crest thickness f of described external screw thread 2 and described the female thread 1 and dental groove well width w of described external screw thread 2 is 0.5 times of pitch P, suitable dental groove well width tolerance value can form certain running clearance, running clearance is to ensure that rotary drill drilling tool threaded engagement in bar process of unloading is smooth and easy, engages securely during work.
Described thread depth H span is between (0.25～0.5) times pitch P, it is preferably 0.25 times of pitch P, so to solve, joint screw thread height H between drilling system is bigger, dissection to drilling system material body, reduce " incised wound " that drilling system bulk material is bigger, improve screw thread connection strength and reduce the wall thickness of material, reducing cost；The tolerance value of suitable thread depth can form certain tooth top gap and with storing lubricating grease and hold dust, to improve the working performance of drilling tool and to reduce thread abrasion.
Further technical scheme is: described in be threaded into the span of pilot angle β between (30 °～60 °).
Further technical scheme is: described in be threaded into pilot angle β and be preferably 45 °.
Further technical scheme is: the dental groove well width W of described the female thread 1 and dental groove well width w of external screw thread 2, and it allows manufacturing tolerance between+0.05～+0.1, and unit is millimeter.
Further technical scheme is: described thread depth H, and it allows manufacturing tolerance between+0.2～+0.3, and unit is millimeter.
Further technical scheme is: the cooperation between female thread 1 and the described external screw thread 2 of described joint screw thread, it is preferred to the matched in clearance of path d centering, and it coordinates can be optionally one of following, H7/f7, H7/g6, H8/f7, H8/g6, H8/h7.
Further technical scheme is: the matched in clearance of described path d centering, it is preferred to H7/f7.
Claims (7)
1. the joint screw thread between rotary drill drilling system, adopts cylinder single line rectangle female thread (1) to couple with cylinder single line rectangle external screw thread (2) including described joint screw thread；Described cylinder single line rectangle female thread (1), including dental groove well width W, crest thickness F, big footpath D, path d, thread depth H, technique withdrawing length E；Described cylinder single line rectangle external screw thread (2), including dental groove well width w, crest thickness f, big footpath D, path d, thread depth H, technique withdrawing length e；The dental groove groove W of described female thread (1) and crest thickness F screws mutually with the crest thickness f of described external screw thread (2) and dental groove groove w respectively, closely linked, all linked with one another, and firmly screws；Path d is that big footpath D deducts two thread depth H, and described joint screw thread only has big footpath D and path d not have central diameter；It is characterized in that the screw thread arrival end of described joint screw thread is provided with and be threaded into pilot angle β, described in be threaded into pilot angle β length C equal to 0.25 times of pitch P；The dental groove well width W of the crest thickness F of described female thread (1) and the crest thickness f of described external screw thread (2) and described female thread (1) and the dental groove well width w of described external screw thread (2) is 0.5 times of pitch P, described thread depth H span is between (0.25～0.5) times pitch P, cooperation between female thread (1) and the external screw thread (2) of described joint screw thread, can adopt the matched in clearance of big footpath D or path d centering.
2. the joint screw thread between rotary drill drilling system according to claim 1, it is characterised in that described in be threaded into the span of pilot angle β between (30 °～60 °).
3. the joint screw thread between rotary drill drilling system according to claim 2, it is characterised in that described in be threaded into pilot angle β and be preferably 45 °.
4. the joint screw thread between rotary drill drilling system according to claim 1, it is characterized in that the permission manufacturing tolerance of the dental groove well width w of the dental groove well width W of described female thread (1) and described external screw thread (2) is between+0.05～+0.1, unit is millimeter.
5. the joint screw thread between rotary drill drilling system according to claim 1, it is characterised in that described thread depth H, it is preferred to 0.25 times of pitch P, it allows manufacturing tolerance between+0.2～+0.3, and unit is millimeter.
6. the joint screw thread between rotary drill drilling system according to claim 1, it is characterized in that the cooperation between the female thread of described joint screw thread (1) and external screw thread (2), it is preferably the matched in clearance of path d centering, it coordinates can be optionally one of following, H7/f7, H7/g6, H8/f7, H8/g6, H8/h7.
7. the joint screw thread between rotary drill drilling system according to claim 6, it is characterized in that coordinating between the female thread of described joint screw thread (1) and external screw thread (2) adopts the path d matched in clearance felt relieved, it coordinates preferably H7/f7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410718918.XA CN105715215A (en) | 2014-12-02 | 2014-12-02 | Connection thread between drilling tool systems of blasthole drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410718918.XA CN105715215A (en) | 2014-12-02 | 2014-12-02 | Connection thread between drilling tool systems of blasthole drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105715215A true CN105715215A (en) | 2016-06-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410718918.XA Pending CN105715215A (en) | 2014-12-02 | 2014-12-02 | Connection thread between drilling tool systems of blasthole drill |
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| CN (1) | CN105715215A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4915426A (en) * | 1989-06-01 | 1990-04-10 | Skipper Claud T | Pipe coupling for well casing |
| WO1999008034A1 (en) * | 1997-08-11 | 1999-02-18 | Marubeni Tubulars, Inc. | Tubular connection |
| CN201507250U (en) * | 2009-07-04 | 2010-06-16 | 王乐康 | Threaded connection drill stem |
| CN204386493U (en) * | 2014-12-02 | 2015-06-10 | 中钢集团衡阳重机有限公司 | Joint screw thread between rotary drill drilling system |
-
2014
- 2014-12-02 CN CN201410718918.XA patent/CN105715215A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4915426A (en) * | 1989-06-01 | 1990-04-10 | Skipper Claud T | Pipe coupling for well casing |
| WO1999008034A1 (en) * | 1997-08-11 | 1999-02-18 | Marubeni Tubulars, Inc. | Tubular connection |
| CN201507250U (en) * | 2009-07-04 | 2010-06-16 | 王乐康 | Threaded connection drill stem |
| CN204386493U (en) * | 2014-12-02 | 2015-06-10 | 中钢集团衡阳重机有限公司 | Joint screw thread between rotary drill drilling system |
Non-Patent Citations (3)
| Title |
|---|
| 杨月英等: "《机械制图》", 30 September 2012 * |
| 董培培等: "《工程制图简明教程》", 31 March 2010 * |
| 金福昌: "《简明车工实用手册》", 31 March 2013 * |
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Effective date of registration: 20180627 Address after: No. 1, Dongfeng Road, Zhu Hui District, Hengyang, Hunan Applicant after: China Steel Group Hengyang Machinery Co., Ltd. Address before: No. 1, Dongfeng Road, Zhu Hui District, Hengyang, Hunan Applicant before: Sinosteel Hengyang Machinery Co., Ltd. |
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Application publication date: 20160629 |