CN103306611B - Special-shaped drill rod used for coal mining and processing technology of drill rod - Google Patents
Special-shaped drill rod used for coal mining and processing technology of drill rod Download PDFInfo
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- CN103306611B CN103306611B CN201310241938.8A CN201310241938A CN103306611B CN 103306611 B CN103306611 B CN 103306611B CN 201310241938 A CN201310241938 A CN 201310241938A CN 103306611 B CN103306611 B CN 103306611B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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Abstract
The invention discloses a special-shaped drill rod used for coal mining and a processing technology of the drill rod. The special-shaped drill rod used for the coal mining comprises a drill rod body provided with a small regular hexagon inner hole, wherein the appearance of the drill body adopts a large regular hexagon, corners of the large regular hexagon and the small regular hexagon are arc-shaped, a distance between every two opposite sides of the large regular hexagon ranges from 20 mm to 30 mm, and the wall thickness of the drill rod body ranges from 3 mm to 4mm. The special-shaped drill rod disclosed by the invention is manufactured by adopting an integrated type seamless structure and a cold drawing technology, and the size accuracy of a product can be effectively controlled; and meanwhile, a thermal refining processing for heating through automatic flowing water superaudio frequency induction is adopted, so that the heating speed is high, the time is short, the processing is simple, the effect is good, the product hardness can be improved, the product stability is enhanced, and the service life of the product is prolonged.
Description
Technical field
The present invention relates to mechanical field, particularly relate to a kind of coal mining special-shaped drilling rod and processing technology thereof.
Background technology
Coal mining special-shaped drilling rod is mining consumptive material tool fitting, existing coal mining special-shaped drilling rod mainly contains the conventional drill rod such as round drill rod and square kelly, this kind of drilling rod in use has certain limitation, its rate of penetration, drilling efficiency and drilling via formations performance etc. are all not so good as special-shaped drilling rod, therefore, in recent years, special-shaped drilling rod grows up gradually.
At present, the manufacture of these special-shaped drilling rods is all that employing hot rolling or cold rolling Forging Technology are shaping, and its dimensional accuracy is low, cannot be controlled effectively; And its Technology for Heating Processing adopts traditional quenching technical, the heat time is of a specified duration, and product hardness control effects is poor, causes the poor stability of product, the shortcomings such as application life is low.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of coal mining special-shaped drilling rod and processing technology thereof, effectively can control the dimensional accuracy of product, and processing technology is simple, speed is fast, and the time is short, effective, can product hardness be improved, strengthen product stability, extend product application life.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: provide a kind of coal mining special-shaped drilling rod, comprise: the drilling rod body with little regular hexagon endoporus, the profile of described drilling rod body is large regular hexagon, and large regular hexagon and little each edge orthohexagonal all curved, distance between described orthohexagonal greatly two opposite side is 20-30mm, and the wall thickness of described drilling rod body is 3-4mm.
In a preferred embodiment of the present invention, each dimensional accuracy of described drilling rod body is ± 0.02mm.
In a preferred embodiment of the present invention, the material of described drilling rod body is 30CrMo.
In a preferred embodiment of the present invention, the hardness of described drilling rod body is HRC39-41.
The processing technology of above-mentioned coal mining special-shaped drilling rod, comprises the following steps:
1) by hot rolling, cold rolling after special-shaped drill rod blank fixing on drawbench, choose interior hexagonal and to move about internal mold and fixing external mold;
2) cold-drawn: keep the axiality that special-shaped drill rod and interior hexagonal are moved about between internal mold, fixing external mold, the interior hexagonal internal mold that moves about is made firmly to extrude little regular hexagon endoporus at the concentric position of special-shaped drill rod, and fixing external mold squeezes out the large regular hexagon profile of drilling rod body, and guarantee the position degree of little regular hexagon endoporus relative to the large regular hexagon profile of drilling rod body;
3) modified: the finished product special-shaped drill rod after cold-drawn to be delivered to automatic streamline superaudio induction unit and carry out modifier treatment.
In a preferred embodiment of the present invention, the described interior hexagonal internal mold that moves about comprises head, shank and connects the tapering transition section of described head and described shank, wherein, described shank is provided with internal thread hole, the material of described head and described tapering transition section is wolfram steel, and the material of described shank is 45# steel.
In a preferred embodiment of the present invention, the tapering of described tapering transition section is 12 °-13 °.
In a preferred embodiment of the present invention, the concrete grammar of the modifier treatment described in step 3) is as follows:
A. finished product special-shaped drill rod is delivered to the heater coil place of automatic streamline superaudio induction unit, first preheat at 840 DEG C of-895 DEG C of temperature, keep 10-12 second;
B. then at 880 DEG C of-915 DEG C of temperature, special-shaped drill rod is heated;
C. cooling unit is used to cool special-shaped drill rod subsequently.
In a preferred embodiment of the present invention, described step c adopts and sprays water to the external surface of drilling rod body, the cooling means of endoporus bath.
The invention has the beneficial effects as follows: adopt integrated seamless structure, hard-drawn technique manufacture forms, effectively can control the dimensional accuracy of product, and adopt the modifier treatment technique of automatic streamline superaudio eddy-current heating, firing rate is fast, time is short, technique is simple, effective, can improve product hardness, strengthen product stability, extend product application life.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of coal mining of the present invention special-shaped drilling rod one preferred embodiment;
The interior hexagonal that Fig. 2 uses when being the cold-drawn of special-shaped drilling rod shown in Fig. 1 is moved about the structural representation of internal mold;
In accompanying drawing, the mark of each parts is as follows: 11, drilling rod body, and 12, endoporus, the distance between B, orthohexagonal greatly two opposite side, δ, wall thickness, 21, head, 22, shank, 221, internal thread hole, 23, tapering transition section, α, tapering.
Detailed description of the invention
Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in detail, can be easier to make advantages and features of the invention be readily appreciated by one skilled in the art, thus more explicit defining is made to protection scope of the present invention.
Refer to Fig. 1 and Fig. 2, the embodiment of the present invention comprises:
Raw material: the special-shaped drilling rod blank through the material of hot rolling, cold-rolling treatment being 30CrMo
Equipment: the induction of drawbench, automatic streamline superaudio unit, cooling unit
Processing technology:
1) be that the special-shaped drilling rod blank of 30CrMo is fixing on drawbench through the material of hot rolling, cold-rolling treatment, choose interior hexagonal and to move about internal mold and fixing external mold;
Wherein, the described interior hexagonal internal mold that moves about comprises head 21, shank 22 and connects the tapering transition section 23 of described head 21 and described shank 22, and described shank 22 is provided with internal thread hole 221, described head 21 is wolfram steel with the material of described tapering transition section 23, the material of described shank 22 is 45# steel, the tapering α of described tapering transition section is 12 °-13 °, is preferably 13 °.
2) cold-drawn: keep the axiality that special-shaped drill rod and interior hexagonal are moved about between internal mold, fixing external mold, the interior hexagonal internal mold that moves about is made firmly to extrude little regular hexagon endoporus 12 at the concentric position of special-shaped drill rod, and fixing external mold squeezes out the large regular hexagon profile of drilling rod body 11, and guarantee the position degree of little regular hexagon endoporus 12 relative to the large regular hexagon profile of drilling rod body 11;
3) the finished product special-shaped drill rod after cold-drawn is delivered to automatic streamline superaudio induction unit and carry out modifier treatment, the concrete grammar of described modifier treatment is as follows:
A. finished product special-shaped drill rod is delivered to the heater coil place of automatic streamline superaudio induction unit, first preheat at 840 DEG C of-895 DEG C of temperature, keep 10-12 second;
B. then at 880 DEG C of-915 DEG C of temperature, special-shaped drill rod is heated;
C. use cooling unit to cool special-shaped drill rod subsequently, adopt and the external surface of drilling rod body 11 is sprayed water, the cooling means that endoporus 12 is washed by water.
The automatic streamline superaudio induction unit adopted is by our company (Changshu Special Shaped Steel Tube Mill Co., Ltd.) self design, and the patent No. is the annealing device of a kind of special-shaped drill rod of ZL201120176354.3.
The coal mining special-shaped drilling rod that the present invention produces, comprise the drilling rod body 11 with little regular hexagon endoporus 12, the profile of described drilling rod body 11 is large regular hexagon, and large regular hexagon and little each edge orthohexagonal all curved, it can be designed to sizes, such as:
| B(mm) | δ(mm) |
| 22.22 | 3.11 |
| 28.58 | 3.915 |
Wherein, B is the distance between orthohexagonal greatly two opposite side of drilling rod body 11; δ is the wall thickness of drilling rod body 11.
Each dimension control of described drilling rod body 11 is within the scope of ± 0.02mm, and the case hardness of described drilling rod body 11 controls within the scope of HRC39-41.
Present invention is disclosed a kind of coal mining special-shaped drilling rod and processing technology thereof, adopt integrated seamless structure, hard-drawn technique manufacture forms, and effectively can control the dimensional accuracy of product, and adopt the modifier treatment technique of automatic streamline superaudio eddy-current heating, firing rate is fast, and the time is short, and technique is simple, effective, can product hardness be improved, strengthen product stability, extend product application life.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize manual of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (5)
1. a processing technology for coal mining special-shaped drilling rod, is characterized in that, comprises the following steps:
1) by hot rolling, cold rolling after special-shaped drill rod blank fixing on drawbench, choose interior hexagonal and to move about internal mold and fixing external mold;
2) cold-drawn: keep the axiality that special-shaped drill rod and interior hexagonal are moved about between internal mold, fixing external mold, the interior hexagonal internal mold that moves about is made firmly to extrude little regular hexagon endoporus at the concentric position of special-shaped drill rod, and fixing external mold squeezes out the large regular hexagon profile of drilling rod body, and guarantee the position degree of little regular hexagon endoporus relative to the large regular hexagon profile of drilling rod body;
3) modified: the finished product special-shaped drill rod after cold-drawn to be delivered to automatic streamline superaudio induction unit and carry out modifier treatment.
2. the processing technology of coal mining special-shaped drilling rod according to claim 1, it is characterized in that, the described interior hexagonal internal mold that moves about comprises head, shank and connects the tapering transition section of described head and described shank, wherein, described shank is provided with internal thread hole, the material of described head and described tapering transition section is wolfram steel, and the material of described shank is 45# steel.
3. the processing technology of coal mining special-shaped drilling rod according to claim 2, is characterized in that, the tapering of described tapering transition section is 12 °-13 °.
4. the processing technology of coal mining special-shaped drilling rod according to claim 1, it is characterized in that, the concrete grammar of the modifier treatment described in step 3) is as follows:
A. finished product special-shaped drill rod is delivered to the heater coil place of automatic streamline superaudio induction unit, first preheat at 840 DEG C of-895 DEG C of temperature, keep 10-12 second;
B. then at 880 DEG C of-915 DEG C of temperature, special-shaped drill rod is heated;
C. cooling unit is used to cool special-shaped drill rod subsequently.
5. the processing technology of coal mining special-shaped drilling rod according to claim 4, is characterized in that, described step c adopts and sprays water to the external surface of drilling rod body, the cooling means of endoporus bath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310241938.8A CN103306611B (en) | 2013-06-19 | 2013-06-19 | Special-shaped drill rod used for coal mining and processing technology of drill rod |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310241938.8A CN103306611B (en) | 2013-06-19 | 2013-06-19 | Special-shaped drill rod used for coal mining and processing technology of drill rod |
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| CN103306611A CN103306611A (en) | 2013-09-18 |
| CN103306611B true CN103306611B (en) | 2015-07-08 |
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| CN201310241938.8A Active CN103306611B (en) | 2013-06-19 | 2013-06-19 | Special-shaped drill rod used for coal mining and processing technology of drill rod |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201190539Y (en) * | 2007-09-08 | 2009-02-04 | 樊铁山 | Abnormity drill rod using electric hand drill head for electric coal drill |
| CN201258698Y (en) * | 2008-09-27 | 2009-06-17 | 中冶京唐建设有限公司 | Drill rod for revolving bore filling pile |
| RU2391558C1 (en) * | 2008-12-16 | 2010-06-10 | Государственное образовательное учреждение высшего профессионального образования Московский государственный технологический университет "СТАНКИН" (ГОУ ВПО МГТУ "СТАНКИН") | Head of hollow pumping rod |
| CN202000911U (en) * | 2011-03-15 | 2011-10-05 | 邹城兖矿泰德工贸有限公司 | Drill pipe for hard rocks |
| CN102305026A (en) * | 2011-05-30 | 2012-01-04 | 常熟市异型钢管有限公司 | Special-shaped drill pipe for geological exploration and processing method thereof |
| CN202627985U (en) * | 2012-04-27 | 2012-12-26 | 山西环界石油钻具制造有限公司 | Overlarge-size hexagonal kelly |
-
2013
- 2013-06-19 CN CN201310241938.8A patent/CN103306611B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201190539Y (en) * | 2007-09-08 | 2009-02-04 | 樊铁山 | Abnormity drill rod using electric hand drill head for electric coal drill |
| CN201258698Y (en) * | 2008-09-27 | 2009-06-17 | 中冶京唐建设有限公司 | Drill rod for revolving bore filling pile |
| RU2391558C1 (en) * | 2008-12-16 | 2010-06-10 | Государственное образовательное учреждение высшего профессионального образования Московский государственный технологический университет "СТАНКИН" (ГОУ ВПО МГТУ "СТАНКИН") | Head of hollow pumping rod |
| CN202000911U (en) * | 2011-03-15 | 2011-10-05 | 邹城兖矿泰德工贸有限公司 | Drill pipe for hard rocks |
| CN102305026A (en) * | 2011-05-30 | 2012-01-04 | 常熟市异型钢管有限公司 | Special-shaped drill pipe for geological exploration and processing method thereof |
| CN202627985U (en) * | 2012-04-27 | 2012-12-26 | 山西环界石油钻具制造有限公司 | Overlarge-size hexagonal kelly |
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| CN103306611A (en) | 2013-09-18 |
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