CN103028890A - Automatic drill pipe thread repair method - Google Patents
Automatic drill pipe thread repair method Download PDFInfo
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- CN103028890A CN103028890A CN2012105761885A CN201210576188A CN103028890A CN 103028890 A CN103028890 A CN 103028890A CN 2012105761885 A CN2012105761885 A CN 2012105761885A CN 201210576188 A CN201210576188 A CN 201210576188A CN 103028890 A CN103028890 A CN 103028890A
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Abstract
The invention relates to an automatic drill pipe thread repair method, which adopts a numerically controlled lathe as machining equipment. The machining steps are as follows: (1) after the radial runout of the head of a drill pipe to be repaired is aligned on the numerically controlled lathe, the drill pipe is clamped; (2) the fundamental dimensions of the drill pipe to be machined are inputted; (3) a lathe tool carrier is switched to a cylindrical turning station to machine the reference face; (4) the thread of the drill pipe to be machined is automatically measured by a workpiece-measuring head on line, and the measured value is calculated by a numerical control system, so that the relative position between a threading tool and the thread to be repaired is obtained to ensure that the track of the threading tool is superposed with the track of the original thread; (5) the thread-repairing process is carried out; (6) a boring tool is used for chamfering and deburring the bore. The automatic drill pipe thread repair method is a novel technique which is integrated with a variety of advanced techniques, such as mechanical, electrical and numerical control techniques and automatic measurement, and after being applied on the numerically controlled pipe-threading lathe, the automatic drill pipe thread repair method can automatically repair the threads of various models of drill pipes from NC26 to NC50 (specified by the API (American Petroleum Institute) standard).
Description
Technical field:
The present invention relates to Machining Technology, belong to oil drill rocker repairing and reusing method, particularly a kind of petroleum drilling rod screw-thread self-repairing method.
Background technology:
The at present reparation of domestic petroleum drill rod thread mainly is to adopt following two kinds of methods:
The first, on engine lathe, carry out the drill rod thread reparation by the way of artificial centering tool setting:
Oil tool joint thread pitch large (5.08～6.35mm), complete tooth form be threaded into the distance of circular bead surface short (≤12.7mm), in order to reach certain surface roughness requirement, also necessarily require quite high cutting speed during machining screw, this is just so that the speed that vertically moves of cutter is very fast; Collide in order to prevent thread-cutting tool and circular bead surface, the machine operation person must concentrate, be quick on the draw, be swift in motion, this technical ability to the operator requires very high, workman's stress during operation, and labour intensity is large, the element precision uniformity is poor, efficient is low, is easy to the damage of products waste or cutter;
The second, on numerically controlled lathe, carry out the drill rod thread reparation by the way of artificial centering tool setting:
When oil tool joint thread is repaired in numerically controlled lathe processing, because be secondary clamping, in order to cut along original thread groove, " disorderly do not detain " when namely guaranteeing machining screw, when drilling rod clamps at lathe, should guarantee that drilling rod must be minimum at circumferencial direction and main shaft coaxiality error, (namely accurately circumferential registration), the zero degree position of photoelectric encoder is corresponding on the starting point that guarantees again helix of thread and the main shaft, and this is impossible realize in practical operation.For the track that guarantees screwer and the position of original thread overlap, the lengthwise position of repeatedly adjusting Tool-rest of Numerical Control Lathe that the operator can only be again and again is until the position of the track of screwer and original thread approaches.Doing like this wastes time and energy, and is difficult to more guarantee that although therefore this method has improved crudy than the first, working (machining) efficiency is still very low when especially when repairing internal thread screwer being aimed at original thread.
Summary of the invention:
The objective of the invention is to overcome the deficiency of prior art, a kind of high accuracy, high efficiency petroleum drilling rod screw-thread self-repairing method are provided.
Purpose of the present invention realizes according to following proposal:
A kind of petroleum drilling rod screw-thread self-repairing method: numerically controlled lathe is process equipment, adopting workpiece probe is automatic testing tool, utilize the automatic process of measurement of independent research and the good in interactive function program of special research and development, petroleum drilling rod screw-thread is repaired automatically, be it is characterized in that its procedure of processing is:
1) after the circular runout of the boring bar head to be repaired of centering on the numerically controlled lathe, clamps drilling rod;
2) basic size of input drilling rod to be repaired;
3) machine tool table is changed to the billmpse tool station, machining benchmark end face, circular bead surface, the head conical surface;
4) utilize automatic process of measurement, workpiece probe is to the on-line automatic measurement of drill rod thread to be repaired, and the value measured is obtained the relative position of screwer and screw thread to be repaired through the digital control system computing, and assurance screwer track overlaps with the original thread track.
5) carry out screw thread and repair procedure;
6) borer is inner bore chamfering, deburring;
Above-mentioned steps 3) refer to from the tool joint thread outer end, according to the thread abrasion situation, 8～12mm excised respectively in end and circular bead surface, again with the taper thread excircle part along original tapering, car is except the corresponding degree of depth;
Above-mentioned steps is that the spindle of numerical control lathe standard is stopped to the zero degree position, after workpiece probe is carried out the automatic process of measurement of independent research, find thread center's face of drill rod thread the second button, the value of measuring is obtained the relative position of screwer and screw thread to be repaired through the digital control system computing, guarantee that the screwer track overlaps with the original thread track, that determines the tool joint original thread enters the cutter point.Thereby can guarantee that screwer can repair processing according to the track of original thread.
The present invention integrates mechanical, electric, Numeric Control Technology and the automatic novel process method of the multiple advanced technology such as measurement, can repair the drill rod thread from (the API standard code) NC26 to the various models of NC50 after being applied on the numerical control pipe thread lathe.The present invention can guarantee the crudy of drill rod thread conscientiously, increases substantially working (machining) efficiency, alleviates operator's labour intensity, and can be applied to processing automatic line, realizes automated production, is a kind of desirable drill rod thread repair process.
Description of drawings:
Fig. 1 is the general assembly schematic diagram of processing unit (plant) of the present invention, among the figure: 1-numerically controlled lathe cutter platform, 2-chuck, 3-drilling rod to be repaired, 4-workpiece probe.
Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 are the automatic process of measurement block diagrams of the present invention, and program continues up to Fig. 6 from Fig. 2;
The specific embodiment:
As shown in Figure 1, the equipment that the present invention is used for the processing oil drill rocker is numerically controlled lathe, comprises numerically controlled lathe cutter platform (1), chuck (2), drilling rod to be repaired (3) workpiece probe (4).
Concrete procedure of processing is as follows:
1. after the circular runout of the boring bar head to be repaired of centering on the numerically controlled lathe, clamp drilling rod.
2. digital control system performing a programme:
2.1. open the screw thread repair function special interface of digital control system, insert successively the basic size of drilling rod to be processed according to the model of tool joint to be repaired, comprise the screw head diameter, tail diameter, length, thread forms code name;
2.2. performing a programme, machine tool table is changed to the billmpse tool station, the main shaft rotation, from the tool joint thread outer end, except 8～12mm, the corresponding car of circular bead surface is except 8～12mm with the end car, again with the taper thread excircle part along original tapering, after the corresponding degree of depth was fallen in turning, cutter left workpiece, and main shaft stops.
3. carry out the on-line automatic process of measurement of drill rod thread.
Measure interface, performing a programme 3.1. open digital control system.Main shaft elder generation standard is stopped to the zero degree position, and workpiece probe moves quickly into the precalculated position, begins to carry out process of measurement, the end face part that measuring workpieces has processed.
After 3.2. the workpiece end face measurement is complete, process of measurement is take end face as benchmark, continue to carry out special-purpose process of measurement, this process of measurement carries out precision monitor with Special circulation detection mode prepared in advance to the median surface position of the second button of tool joint original thread track and determines.
3.3. digital control system stores the data that collect into specific address, then workpiece probe is left workpiece, and the value measured just can be obtained the relative position of screwer and screw thread to be repaired through the digital control system computing, and assurance screwer track overlaps with the original thread track.
3.4. automatically be input to the digital control system specific address through the value of calculating, carry out screw thread reparation procedure and just screw thread can be machined to finished product.
3.5. be inner bore chamfering with borer, deburring.
When numerically controlled lathe application drill rod thread is repaired machining functions automatically, the operator only need to be according to the corresponding value of human-computer interaction interface input of digital control system, the processing of all data is finished at hind computation by digital control system, the handling procedure of data and final procedure can generate automatically, also can show as required or hiding procedure.Each step has corresponding view interface to point out, and such as error in operation, system also has corresponding information.
The present invention has mainly realized the design object of following several respects in concrete operations:
1. the on-line automatic measurement of drill rod thread;
2. the data after the on-line measurement are processed;
3. be the special interface of Development of CNC screw thread reparation processing;
4. repair the macroprogram establishment of screw thread and the research of processing technology;
5. generation and the use of final parts program.
The drill rod thread measuring principle is as follows:
1. on lathe, workpiece centering is also clamped.
2. execution process of measurement, the position of measuring workpieces right side.
3. performing a programme is with the length about workpiece end face turning 10MM.
4. carry out warrant stop of spindle main shaft is parked in encoder 0 degree position.
5. execution process of measurement, the value of elder generation measuring workpieces right side, system calculates the length that practical work piece machines away automatically, taper value 1:6 according to screw thread, can calculate the size of current major diameter of thread, gauge head moves to first the position greater than current major diameter of thread 0.7-0.8MM (difference in height of each phase adjacent teeth of screw thread), begin vertically to move to the workpiece left end and begin to measure, after issuing an order Deng gauge head, remember current location, gauge head is reverse mobile 2.5MM vertically, and gauge head moves 1MM along the diameter of work direction again, and gauge head is again along workpiece spindle to measuring to right-hand member, if issue an order then finish surveying work, as not issuing an order, gauge head is got back to original position and is moved 1MM along the diameter of work direction again, repeats above-mentioned steps until measurement is finished.
6. the value that will just now measure of digital control system is calculated, and the data of handling are deposited in the fixing argument table.
7. screwer calls the cutter handled and mends (measured value+initial value) and just can process.
The program that drill rod thread is measured automatically such as Fig. 2-shown in Figure 6.
Claims (3)
1. petroleum drilling rod screw-thread self-repairing method, numerically controlled lathe is process equipment, it is characterized in that its procedure of processing is:
1) after the circular runout of the boring bar head to be repaired of centering on the numerically controlled lathe, clamps drilling rod;
2) basic size of input drilling rod to be repaired;
3) machine tool table is changed to the billmpse tool station, machining benchmark end face, circular bead surface, the head conical surface;
4) utilize automatic process of measurement, workpiece probe is to the on-line automatic measurement of drill rod thread to be repaired, and the value measured is obtained the relative position of screwer and screw thread to be repaired through the digital control system computing, and assurance screwer track overlaps with the original thread track
5) carry out screw thread and repair procedure;
6) borer is inner bore chamfering, deburring.
2. petroleum drilling rod screw-thread self-repairing method as claimed in claim 1, it is characterized in that above-mentioned steps 3) refer to first from the tool joint thread outer end, according to the thread abrasion situation, 8～12mm is excised respectively in end and circular bead surface, again with the taper thread excircle part along original tapering, car is except the corresponding degree of depth.
3. petroleum drilling rod screw-thread self-repairing method as claimed in claim 1, it is characterized in that above-mentioned steps is that the spindle of numerical control lathe standard is stopped to the zero degree position, after workpiece probe is carried out the automatic process of measurement of independent research, detect thread center's face of drill rod thread second button, thus can determine the original screw thread of drilling rod enter the cutter point.Can guarantee that namely screwer can repair processing according to the track of original thread.
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| CN2012105761885A CN103028890A (en) | 2012-12-27 | 2012-12-27 | Automatic drill pipe thread repair method |
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| CN2012105761885A CN103028890A (en) | 2012-12-27 | 2012-12-27 | Automatic drill pipe thread repair method |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103231200A (en) * | 2013-04-22 | 2013-08-07 | 天津德华石油装备制造有限公司 | Repairing method of threads of oil drill pipe |
| CN104227317A (en) * | 2013-06-21 | 2014-12-24 | 上海宝钢工业技术服务有限公司 | Method for repairing water flusher or exhaust head of steel-pipe hydrostatic testing machine |
| CN104385069A (en) * | 2014-09-26 | 2015-03-04 | 宁波鸿达电机模具有限公司 | Method for repairing electrode wire guider of low-speed wire cutting machine tool |
| CN106403756A (en) * | 2016-10-20 | 2017-02-15 | 深圳市中图仪器科技有限公司 | Long-pipe taper thread measurement device, taper plug gauge clamp and taper ring gauge clamp |
| CN107754122A (en) * | 2017-09-06 | 2018-03-06 | 国营芜湖机械厂 | A kind of special repair method of aerial extinguishing bottle |
| CN108620965A (en) * | 2018-04-09 | 2018-10-09 | 哈尔滨汽轮机厂有限责任公司 | A kind of processing rectification pillar special screw tap reconditioning reuse method |
| CN109129022A (en) * | 2018-10-31 | 2019-01-04 | 安徽工程大学 | It is a kind of for repairing the clamping and positioning device of screw thread |
| CN109290643A (en) * | 2018-10-23 | 2019-02-01 | 贵州航飞精密制造有限公司 | A kind of externally threaded reworking method of engine structure |
| CN110788419A (en) * | 2019-09-20 | 2020-02-14 | 济宁天岳新材料科技有限公司 | Thread milling equipment for screw |
| CN112756905A (en) * | 2021-01-14 | 2021-05-07 | 山东威玛装备科技股份有限公司 | Numerical control repairing method for double-shoulder threads of drilling tool |
| CN113419486A (en) * | 2021-04-29 | 2021-09-21 | 江苏双环齿轮有限公司 | Method for repairing screw thread or spiral groove |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103231200B (en) * | 2013-04-22 | 2017-04-12 | 天津德华石油装备制造有限公司 | Repairing method of threads of oil drill pipe |
| CN103231200A (en) * | 2013-04-22 | 2013-08-07 | 天津德华石油装备制造有限公司 | Repairing method of threads of oil drill pipe |
| CN104227317A (en) * | 2013-06-21 | 2014-12-24 | 上海宝钢工业技术服务有限公司 | Method for repairing water flusher or exhaust head of steel-pipe hydrostatic testing machine |
| CN104227317B (en) * | 2013-06-21 | 2018-02-16 | 上海宝钢工业技术服务有限公司 | The flushing head of steel pipe hydrostatic tester or the restorative procedure of exhaust head |
| CN104385069A (en) * | 2014-09-26 | 2015-03-04 | 宁波鸿达电机模具有限公司 | Method for repairing electrode wire guider of low-speed wire cutting machine tool |
| CN106403756B (en) * | 2016-10-20 | 2019-09-20 | 深圳市中图仪器股份有限公司 | A kind of measuring device, taper plug gauge fixture and the taper ring-ga(u)ge fixture of long tubing taper thread |
| CN106403756A (en) * | 2016-10-20 | 2017-02-15 | 深圳市中图仪器科技有限公司 | Long-pipe taper thread measurement device, taper plug gauge clamp and taper ring gauge clamp |
| CN107754122A (en) * | 2017-09-06 | 2018-03-06 | 国营芜湖机械厂 | A kind of special repair method of aerial extinguishing bottle |
| CN108620965A (en) * | 2018-04-09 | 2018-10-09 | 哈尔滨汽轮机厂有限责任公司 | A kind of processing rectification pillar special screw tap reconditioning reuse method |
| CN109290643A (en) * | 2018-10-23 | 2019-02-01 | 贵州航飞精密制造有限公司 | A kind of externally threaded reworking method of engine structure |
| CN109129022A (en) * | 2018-10-31 | 2019-01-04 | 安徽工程大学 | It is a kind of for repairing the clamping and positioning device of screw thread |
| CN109129022B (en) * | 2018-10-31 | 2023-12-05 | 安徽工程大学 | Clamping and positioning device for repairing threads |
| CN110788419A (en) * | 2019-09-20 | 2020-02-14 | 济宁天岳新材料科技有限公司 | Thread milling equipment for screw |
| CN110788419B (en) * | 2019-09-20 | 2020-09-15 | 济宁天岳新材料科技有限公司 | Thread milling equipment for screw |
| CN112756905A (en) * | 2021-01-14 | 2021-05-07 | 山东威玛装备科技股份有限公司 | Numerical control repairing method for double-shoulder threads of drilling tool |
| CN113419486A (en) * | 2021-04-29 | 2021-09-21 | 江苏双环齿轮有限公司 | Method for repairing screw thread or spiral groove |
| CN113419486B (en) * | 2021-04-29 | 2022-06-10 | 江苏双环齿轮有限公司 | Method for repairing screw thread or spiral groove |
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Application publication date: 20130410 |