CN102151917A - Movable joint thread synchronous tapping method and movable joint thread synchronous tapping device - Google Patents

Movable joint thread synchronous tapping method and movable joint thread synchronous tapping device Download PDF

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Publication number
CN102151917A
CN102151917A CN 201110040342 CN201110040342A CN102151917A CN 102151917 A CN102151917 A CN 102151917A CN 201110040342 CN201110040342 CN 201110040342 CN 201110040342 A CN201110040342 A CN 201110040342A CN 102151917 A CN102151917 A CN 102151917A
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CN
China
Prior art keywords
tapping
movable joint
screw tap
workpiece
gear
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CN 201110040342
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Chinese (zh)
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CN102151917B (en
Inventor
左毅
周长涛
孙效卫
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JINAN SHENGDUO SHUKONG MACHINE CO Ltd
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JINAN SHENGDUO SHUKONG MACHINE CO Ltd
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Priority to CN201110040342A priority Critical patent/CN102151917B/en
Publication of CN102151917A publication Critical patent/CN102151917A/en
Application granted granted Critical
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Abstract

The invention discloses a movable joint thread synchronous tapping method and a movable joint thread synchronous tapping device and belongs to the technical field of movable joint machining. A tapping screw rod provided with a screw tap at the front end is arranged in a hollow main shaft of a numerical control lathe; the screw tap is driven by a power mechanism to rotate and is identical with a workpiece clamped by a chuck in rotating direction; when the rotating speed of the screw tap is higher than that of the workpiece, the screw tap rotates for tapping opposite to the forward direction of the workpiece; and when the rotating speed of the screw tap is lower than that of the workpiece, the screw tap rotates for returning opposite to the reverse direction of the workpiece. The movable joint thread synchronous tapping method and the movable joint thread synchronous tapping device realize the effect that after a movable joint is clamped and positioned at one time on the numerical control lathe, an inner circle at the front end of the movable joint, an end surface and threads at the rear end are simultaneously machined so as to greatly improve the machining efficiency, improve the machining precision, save the equipment investment and reduce the energy consumption.

Description

Synchronous tapping method of a kind of movable joint screw thread and the synchronous chasing bar of movable joint screw thread
Technical field
The present invention relates to the synchronous tapping method of a kind of movable joint screw thread, belong to the movable joint processing technique field.The invention still further relates to the synchronous chasing bar of movable joint screw thread.
Background technology
Metal and plastic pipe are widely used in fields such as building water supply and drainage and oil gas conveying, and movable joint belongs to the main connector in the pipe fitting.How to improve its production efficiency under the prerequisite that guarantees the movable joint quality, be the problem that pipe fitting manufacturing enterprise is constantly pursued always.In traditional movable joint processing technology, the processing of the outer surface of movable joint, end face and endoporus is finished on numerically controlled lathe, and the processing of movable joint internal thread is to finish on tapping machine as independent operation.Because each operation is finished on distinct device, workpiece needs repeated clamping, location, and this greatly reduces production efficiency, has increased labour intensity, and the power consumption of polymer processing height has increased manufacturing cost; Owing to the clamping position difference of movable joint blank on distinct device, must cause the skew of machining benchmark in addition, thereby be difficult to guarantee the axiality of movable joint front end endoporus and rear end screw thread, influence the machining accuracy of movable joint.
Summary of the invention
At the above-mentioned defective that exists in the prior art, the invention provides a kind of method of in to the movable joint front end, in circle, the end face processing movable joint internal thread being carried out synchronous processing, its clamping location, synchronous processing, can significantly enhance productivity, reduce labour intensity, improve machining accuracy.
The present invention is achieved by the following technical solution: the synchronous tapping method of movable joint screw thread, its special character is, the tapping bar that front end is equipped with screw tap is set in the hollow spindle of numerically controlled lathe, actuating unit drives screw tap rotation and identical with the workpiece direction of rotation of chuck clamping, when the screw tap rotary speed is higher than the workpiece rotary speed, screw tap is rotated in the forward tapping with respect to workpiece, and when the screw tap rotary speed was lower than the workpiece rotary speed, screw tap moved back silk with respect to the workpiece reverse rotation.
The present invention utilizes the differential principle, reaches tapping and moves back the purpose of silk by the relative rotation speed that the relative rotation speed that is higher than workpiece is provided for screw tap or is lower than workpiece.When the rotating speed of screw tap is higher than workpiece rotational frequency, realize the forward direction tapping campaign of screw tap with respect to workpiece, its tapping rotating speed is both rotating speed poor; When the rotating speed of screw tap is lower than workpiece rotational frequency, realize screw tap back to moving back the silk motion with respect to workpiece, it moves back a rotating speed and also is both rotating speed poor.
The power that drives the screw tap rotation among the present invention can adopt any form of prior art, but considers the purpose that cuts down the consumption of energy, and the actuating unit of described drive screw tap rotation is power-actuated by lathe spindle.For the screw tap rotation provides power, do not need additionally to increase power source by lathe spindle, can effectively cut down the consumption of energy.
The present invention also provides a kind of device that utilizes said method to the synchronous tapping of movable joint screw thread, the technical scheme that it adopted is: the synchronous chasing bar of a kind of movable joint screw thread, it comprises that being located in interior its front end of numerically controlled lathe hollow spindle is equipped with the tapping bar of screw tap and drives the transmission mechanism that the tapping bar rotates, described tapping bar stretches out the outer end of main shaft and is arranged with first gear and second gear, the transmission mechanism of described drive tapping bar rotation comprises drive link and two electromagnetic clutch that have high gear and low-speed gear respectively that are located on the drive link, described high gear and low-speed gear can be respectively and first gear and second gears engaged, and the secondary of the driving end of drive link and Lathe Spindle Box is in transmission connection.
The present invention utilizes the secondary transmission of spindle of numerical control lathe case as power, realizes that by gear and electromagnetic clutch the high, low speed of screw tap is switched.It utilizes the differential principle, reaches tapping and moves back the purpose of silk by the relative rotation speed that the relative rotation speed that is higher than workpiece is provided for screw tap or is lower than workpiece.When the rotating speed of screw tap is higher than workpiece rotational frequency, realize the forward direction tapping campaign of screw tap with respect to workpiece; When the rotating speed of screw tap is lower than workpiece rotational frequency, realize that screw tap moves to moving back silk with respect to the back of workpiece.Because the forward tapping and when oppositely moving back thread screw tap and workpiece all be to do in the same way to rotatablely move, avoided frequent rotating switching, the service life of having improved equipment.
For the ease of the smooth tapping of screw tap and move back silk, the present invention is provided with at the tail end of tapping bar can promote the boosting mechanism that the tapping bar moves forward and backward.A tapping or when moving back thread is given external force forward or backward of screw tap by boosting mechanism, can guarantee the smooth tapping of screw tap or move back silk.
Described boosting mechanism comprises the post a letter driving lever of piece of the piece and can promoting of posting a letter that is arranged on the tapping bar, and described driving lever is connected with hydraulic jack.
For the ease of the control tapping degree of depth, the piece of posting a letter on the corresponding tapping bar of the present invention is provided with the switch of posting a letter that is used to control the tapping degree of depth.
The invention has the beneficial effects as follows: the present invention is simple in structure, processing is reliable, it is by being provided with the tapping bar that front end is equipped with screw tap in the hollow spindle of numerically controlled lathe, and by the differential between screw tap and workpiece, realized processing to the movable joint internal thread, realized on the numerically controlled lathe with clamping of movable joint, location after, circle, end face and rear end screw thread in the movable joint front end are processed simultaneously.Because each manufacturing procedure can be carried out simultaneously, workpiece does not need repeated clamping, location, thereby has increased substantially working (machining) efficiency, guarantee the axiality of movable joint front end endoporus and rear end screw thread, improved machining accuracy, saved the equipment input, reduce energy consumption, can reduce manufacturing cost greatly.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention 2;
Among the figure: 1, the piece of posting a letter, 2, the switch I of posting a letter, 3, the switch I of posting a letter I, 4, geared sleeve, 5, bearing chamber, 6, first gear, 7, second gear, 8, hydraulic jack, 9, casing, 10, trombone slide, 11, the tapping bar, 12, chuck connects dish, 13, chuck, 14, workpiece, 15, hydraulic jack, 16, driving lever, 17, travelling gear I, 18, electromagnetic clutch, 19, low-speed gear, 20, high gear, 21, drive link, 22, oil cylinder connects dish, 23, travelling gear II, 24, main shaft, 25, main spindle box, 26, screw tap, 27, claw.
The specific embodiment
Also the present invention is further illustrated in conjunction with the accompanying drawings below by non-limiting embodiment:
Embodiment 1
The synchronous tapping method of a kind of movable joint screw thread, it is that the tapping bar that front end is equipped with screw tap is set in the hollow spindle of numerically controlled lathe, actuating unit drives screw tap rotation and identical with the workpiece direction of rotation of chuck clamping, when the screw tap rotary speed is higher than the workpiece rotary speed, screw tap is rotated in the forward tapping with respect to workpiece, when the screw tap rotary speed was lower than the workpiece rotary speed, screw tap moved back silk with respect to the workpiece reverse rotation.
The present invention utilizes the differential principle, when the rotating speed of screw tap is higher than workpiece rotational frequency, realizes the forward direction tapping campaign of screw tap with respect to workpiece, and its tapping rotating speed is both rotating speed poor; When the rotating speed of screw tap is lower than workpiece rotational frequency, realize screw tap back to moving back the silk motion with respect to workpiece, it moves back a rotating speed and also is both rotating speed poor.
The power that drives the actuating unit of screw tap rotation in the present embodiment can adopt any form of prior art, as driving its rotation by independent power source and controlling its rotating speed, but consider the purpose that cuts down the consumption of energy, the actuating unit of described drive screw tap rotation can be driven by the power of lathe spindle.Lathe spindle can drive the screw tap rotation for the tapping bar transmission of power by transmission mechanism.The high, low speed of screw tap is switched and can be realized by arrangements for speed regulation are set in transmission mechanism.For the screw tap rotation provides power, do not need additionally to increase power source by lathe spindle, can effectively cut down the consumption of energy.
Embodiment 2
As shown in drawings, comprise numerically controlled lathe, be located in the tapping bar 11 in the hollow spindle 24 of numerically controlled lathe and can drive the transmission mechanism of tapping bar 11 rotations.Described numerically controlled lathe is a centre numerically controlled lathe, is prior art, and it adopts the oild chuck holding workpiece.Chuck 13 has the endoporus of hollow, and it connects dish 12 by chuck and is connected with main shaft 24, and the hydraulic jack 8 that is located at main shaft 24 1 ends is controlled claw 27 holding workpieces 14 of chucks 13 by the trombone slide 10 that is connected with chuck 13.The main shaft 24 of numerically controlled lathe is provided with travelling gear I 17, is provided with the secondary travelling gear II 23 that is meshed with travelling gear I 17 in the main spindle box 25.Described tapping bar 11 is a stock, its front end is equipped with screw tap 26, this end can stretch into the endoporus of chuck 13, the other end of tapping bar 11 stretches out outside the main shaft 24 and is bearing in by bearing in the dead eye of casing 9, the tail end of tapping bar 11 stretches out outside the casing 9, be with geared sleeve 4 being positioned on the tapping bar of casing 9, be arranged with the first different gear 6 of the number of teeth and second gear 7 on the geared sleeve 4.The transmission mechanism of described drive tapping bar 11 rotations comprises drive link 21 and two electromagnetic clutch 18 that have high gear 19 and low-speed gear 20 respectively that are located on the drive link 21.Described high gear 19 and low-speed gear 20 can mesh with first gear 6 and second gear 7 respectively.The driving end of drive link 21 is connected with the power transmission shaft of travelling gear II23.Tail end at tapping bar 11 is provided with the piece 1 of posting a letter, and is provided with two switches of posting a letter corresponding to the piece 1 of posting a letter: the switch I of posting a letter 2 and the switch I I 3 that posts a letter.Also be provided with the driving lever 16 of the piece 1 that can promote to post a letter corresponding to the piece 1 of posting a letter, driving lever 16 is connected with hydraulic jack 15.
The present invention realizes that by the speed discrepancy of tapping bar and lathe spindle forward direction tapping and back are to moving back silk.Its course of work is: lathe spindle 24 drive workpiece 14 rotations (at this moment, can front end to the workpiece front end in circle, end face lamp etc. carry out turning processing), main shaft 24 by travelling gear I 17 and travelling gear II 23 with transmission of power to drive link 21.Drive link 21 drives the screw tap rotation by electromagnetic clutch 18 and corresponding gear drive tapping bar 11.Wherein, electromagnetic clutch 18 has three kinds of attracting states: drive link 21 is all thrown off with low-speed gear 19 and high gear 20 with high gear 20 adhesives, drive link 21 with low-speed gear 19 adhesives, drive link 21.When electromagnetic clutch was in disengaged condition, low-speed gear 19 and high gear 20 did not rotate, and tapping bar 11 is in free state; When electromagnetic clutch is in the high speed attracting state, rotary power passes to second gear 7 by high gear 20, pass to tapping bar 11 by geared sleeve 4 again, this moment is because the rotary speed of tapping bar 11 is higher than the rotary speed of main shaft 24, under the forward power-assisted of driving lever 16, the forward tapping that tapping bar 11 is realized workpiece 14; When electromagnetic clutch is in the low speed attracting state, rotary power passes to first gear 6 by low-speed gear 19, pass to tapping bar 11 by geared sleeve 4 again, this moment is because the rotary speed of tapping bar 11 is lower than the rotary speed of main shaft 24, under the reverse power-assisted of driving lever 16, tapping bar 11 is realized oppositely moving back silk from workpiece 14.Two switches of posting a letter are respectively applied for the front and back position that detects tapping bar 11, and the high low speed adhesive of the signal controlling electromagnetic clutch that control system is sent according to the switch of posting a letter and the power-assisted forward or backwards of driving lever 16 are so that realize the forward tapping and oppositely move back silk.Wherein, the switch I I 3 that posts a letter that is positioned at front end is used to control the degree of depth of tapping, and the switch I 2 of posting a letter that is positioned at the rear end is used to control the final position of moving back silk.
Other parts of the present invention adopt prior art, do not repeat them here.
The present invention is simple in structure, and reliable operation behind clamping, the location, can be processed simultaneously to circle, end face and rear end screw thread in the movable joint front end, has significantly improved working (machining) efficiency, has improved machining accuracy.

Claims (6)

1. synchronous tapping method of movable joint screw thread, it is characterized in that: the tapping bar that front end is equipped with screw tap is set in the hollow spindle of numerically controlled lathe, actuating unit drives screw tap rotation and identical with the workpiece direction of rotation of chuck clamping, when the screw tap rotary speed is higher than the workpiece rotary speed, screw tap is rotated in the forward tapping with respect to workpiece, when the screw tap rotary speed was lower than the workpiece rotary speed, screw tap moved back silk with respect to the workpiece reverse rotation.
2. the synchronous tapping method of movable joint screw thread according to claim 1 is characterized in that: the actuating unit of described drive screw tap rotation is power-actuated by lathe spindle.
3. synchronous chasing bar of movable joint screw thread, it is characterized in that: it comprises that being located in interior its front end of numerically controlled lathe hollow spindle (24) is equipped with the tapping bar (11) of screw tap and drives the transmission mechanism that tapping bar (11) rotates, described tapping bar (11) stretches out the outer end of main shaft (24) and is arranged with first gear (6) and second gear (7), the transmission mechanism of described drive tapping bar (11) rotation comprises drive link (21) and is located at two electromagnetic clutch (18) that have high gear (19) and low-speed gear (20) respectively on the drive link (21), described high gear (19) and low-speed gear (20) can mesh with first gear (6) and second gear (7) respectively, and the driving end and the secondary of Lathe Spindle Box of drive link (21) are in transmission connection.
4. the synchronous chasing bar of movable joint screw thread according to claim 3 is characterized in that: be provided with at the tail end of tapping bar (11) and can promote the boosting mechanism that tapping bar (11) moves forward and backward.
5. the synchronous chasing bar of movable joint screw thread according to claim 4 is characterized in that: described boosting mechanism comprises the piece of posting a letter (1) that is arranged on the tapping bar (11) and the driving lever (16) of piece (1) that can promote to post a letter, and described driving lever (16) is connected with hydraulic jack.
6. the synchronous chasing bar of movable joint screw thread according to claim 5 is characterized in that: the piece of posting a letter (1) on the corresponding tapping bar (11) is provided with the switch of posting a letter that is used to control the tapping degree of depth.
CN201110040342A 2011-02-18 2011-02-18 Movable joint thread synchronous tapping method and movable joint thread synchronous tapping device Expired - Fee Related CN102151917B (en)

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CN201110040342A CN102151917B (en) 2011-02-18 2011-02-18 Movable joint thread synchronous tapping method and movable joint thread synchronous tapping device

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Application Number Priority Date Filing Date Title
CN201110040342A CN102151917B (en) 2011-02-18 2011-02-18 Movable joint thread synchronous tapping method and movable joint thread synchronous tapping device

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CN102151917B CN102151917B (en) 2012-10-03

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104708129A (en) * 2013-12-12 2015-06-17 铜陵市永生机电制造有限责任公司 Automatic cutter withdrawal feeding device for turning threads
CN106217131A (en) * 2016-07-27 2016-12-14 西北工业大学 Tapping process synchronous error measuring method
CN106346091A (en) * 2016-08-26 2017-01-25 中航动力股份有限公司 Mechanism capable of controlling machining depth, radial drilling machine and machining method

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1083243A (en) * 1953-09-10 1955-01-06 Bernhard Pfeifer & Sohne G M B Rigid rotating head or rotating device for lathe work
US3256542A (en) * 1964-07-23 1966-06-21 Nat Acme Co Lead screw threading attachment
CN86209753U (en) * 1986-11-28 1988-06-15 东北输油管理局铁岭机修厂 Multi-shaft machine tool thread rolling device
CN2734377Y (en) * 2004-09-08 2005-10-19 襄樊特种电机有限公司 Double end digital control special purpose lathe
CN101670444A (en) * 2009-09-29 2010-03-17 东莞市台科精密机械有限公司 CNC lathe
CN201728373U (en) * 2010-05-27 2011-02-02 宁波海顺数控机械有限公司 Pneumatic drilling mechanism for lathe
CN201950305U (en) * 2011-02-18 2011-08-31 济南圣多数控机床有限公司 Device for synchronously tapping threads of movable joint

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1083243A (en) * 1953-09-10 1955-01-06 Bernhard Pfeifer & Sohne G M B Rigid rotating head or rotating device for lathe work
US3256542A (en) * 1964-07-23 1966-06-21 Nat Acme Co Lead screw threading attachment
CN86209753U (en) * 1986-11-28 1988-06-15 东北输油管理局铁岭机修厂 Multi-shaft machine tool thread rolling device
CN2734377Y (en) * 2004-09-08 2005-10-19 襄樊特种电机有限公司 Double end digital control special purpose lathe
CN101670444A (en) * 2009-09-29 2010-03-17 东莞市台科精密机械有限公司 CNC lathe
CN201728373U (en) * 2010-05-27 2011-02-02 宁波海顺数控机械有限公司 Pneumatic drilling mechanism for lathe
CN201950305U (en) * 2011-02-18 2011-08-31 济南圣多数控机床有限公司 Device for synchronously tapping threads of movable joint

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104708129A (en) * 2013-12-12 2015-06-17 铜陵市永生机电制造有限责任公司 Automatic cutter withdrawal feeding device for turning threads
CN106217131A (en) * 2016-07-27 2016-12-14 西北工业大学 Tapping process synchronous error measuring method
CN106346091A (en) * 2016-08-26 2017-01-25 中航动力股份有限公司 Mechanism capable of controlling machining depth, radial drilling machine and machining method
CN106346091B (en) * 2016-08-26 2019-02-01 中航动力股份有限公司 A kind of mechanism of controllable working depth, radial drilling machine and processing method

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