CN102814511A - Device and method for detecting and adjusting spiral tracks on spindle of numerical control thread repairing lathe - Google Patents
Device and method for detecting and adjusting spiral tracks on spindle of numerical control thread repairing lathe Download PDFInfo
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- CN102814511A CN102814511A CN201210116915XA CN201210116915A CN102814511A CN 102814511 A CN102814511 A CN 102814511A CN 201210116915X A CN201210116915X A CN 201210116915XA CN 201210116915 A CN201210116915 A CN 201210116915A CN 102814511 A CN102814511 A CN 102814511A
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Abstract
The invention provides a device for adjusting inherent spiral tracks of a knife point on a spindle of a numerical control thread repairing lathe. The device is characterized in that the device mainly comprises a lathe body, a lathe head box and a tail platform. The lathe head box and the tail platform are arranged on the lathe body, the spindle capable of moving in a rotary mode is horizontally installed in the lathe head box, the rear side of the lathe head box is provided with a spindle encoder with a casing capable of rotating under the driving by a servo motor, and the front end and the rear end of the spindle are respectively provided with a front chuck and a rear chuck. Bracket multi-group carrier rollers are further arranged on one side of the lathe body. One end of the tail platform facing the lathe head box is provided with a positioning cone device, and a phase detecting sensor for electronic detection and positioning of threaded phase is further arranged between the lathe head box and the tail platform. The device for adjusting the inherent spiral tracks of the knife point on the spindle of the numerical control thread repairing lathe remarkably improves the level of drill rod thread repairing technologies, the quality level and economic benefit.
Description
Technical field
Patent of the present invention is used for the metal cutting manufacture field; Relate to numerical control pipe thread lathe the inside and outside old thread at used oil drill rocker, the isometric pipe class of drill collar workpiece two ends is repaired in the turning function, change the device of intrinsic point of a knife cutting helical trajectory on the lathe spindle.
Background technology
In oil and geological drilling industry, piercing the dark drill bit of underground a few km all is by hundreds of root drilling rod and drill collar, rely on its two ends a root of screw thread screw, and link to each other with ground drill, ground drill is given drill bit through these drilling rods, drill collar with transmission of torque.These drilling rods, drill collar unload, reclaim, keep in repair with needing a root, and turnover are used repeatedly after the drilling well work of accomplishing a bite well.In the maintenance work of drilling rod, drill collar, it is one of most important work that the inside and outside taper joint screw thread at its two ends is carried out turning reparation processing.There is every year a large amount of taper tool joint threads need repair turning processing.
At present, people are on mechanical pipe threading machine to the reparation turning processing of the taper tool joint thread at drilling rod, drill collar two ends, are accomplished by workman's manual operations.The reason of implementing mechanical lathe reparation turning taper thread hand-manipulated is; Manual operations can easily be transferred to point of a knife in the groove of screw thread earlier; Again in cutter is spinned motion process with respect to workpiece; With two side surfaces of the former triangle thread of haveing been friends in the past equably car remove one deck, corrosion, spot corrosion, glue trace, bruise mark and stress fatigue layer car are gone, reach the processing request of repairing screw thread.The advantage that this mechanical type is repaired turning tapered thread is: the radial cutting amount of screw thread is little, and little according to the length dimension reduction of drilling rod behind the just feasible each reparation screw thread of the principle of taper, the reparation number of times of drilling rod increases, and prolong the service life of drilling rod.
In mechanical manufacturing field; Use numerically controlled lathe turning taper thread machining screw precision height, good, the high tangible technical advantage of working (machining) efficiency of surface quality to be arranged, so numerically controlled lathe has been widely used in the manufacturing processing of new screw thread than the lathe turning of use mechanical type.In the cutted thread function of present existing numerically controlled lathe; After as long as factors such as thread parameter and cutter installation site are confirmed; The point of a knife of cutter all is that fix, intrinsic with respect to the spiral movement locus of every chassis bed main shaft; And this intrinsic helical trajectory of each chassis bed is different, but this intrinsic point of a knife helical trajectory be again people only with sense organ can not learn.This intrinsic rule just because of the point of a knife helical trajectory; To be repaired old workpiece for the existing screw thread to the lathe spindle chuck of clamping at random; Intrinsic point of a knife cutting helical trajectory on its workpiece helix and the machine tool chief axis does not overlap; And the phase difference between these two helixes is random law, and point of a knife can not be processed along the groove of workpiece old thread, thereby disorderly button phenomenon occurs.According to present numerically controlled lathe technical merit, the way that screw thread is repaired in numerical control exactly with old thread from tooth root outwards all cars fall the new car of the laying equal stress on screw thread that makes new advances.The deficiency that turning tapered thread is repaired in numerical control under this technical merit is: the radial cutting amount of screw thread is big, and the length dimension reduction of drilling rod is big after the turning, and the reparation number of times of drilling rod reduces, and economic benefit is not good.Here it is, and present numerically controlled lathe can not be applied directly to the sole cause that old thread is repaired manufacture field.
The unmodifiable reason of the intrinsic helical trajectory of point of a knife is on the generation lathe spindle; Lathe is in the cutted thread process; The lengthwise movement of cutter all the time by workpiece change 1 circle-knife rest move 1 helical pitch on average and the transient state rule following rotatablely moving of main shaft; The computer of digital control system need obtain the main shaft position signalling of any time calculating and controlling in the process of this function.People have installed a rotary encoder on spindle stock, its stator casing is fixedly mounted on the headstock, and its rotor spindle nose and lathe spindle are the 1:1 ratio transmissions, and this rotary encoder is spindle encoder.
Lathe spindle changes 1 circle, and the rotor of spindle encoder just changes 1 circle.Encoder rotor revolution 1 circle all can send the electric impulse signal of fixed qty, and this external encoder rotor also can send the electric impulse signal of an expression " O " position during with respect to a certain fixed position of stator, and this " O " position is at random and fixes.The phase place of the intrinsic helical trajectory of point of a knife is just relevant with the absolute position of this " O " position signalling on the main shaft.Therefore, digital control system is after receiving this rule signal, and the phase place of the intrinsic helical trajectory of point of a knife on the main shaft that obtains of controlling also just must demonstrate at random and fixing rule.
Summary of the invention
Goal of the invention: the present invention provides a kind of device and method that the numerical control screw thread is repaired the intrinsic helical trajectory of point of a knife on the lathe spindle that changes; Its objective is that solution is in the past in workpiece reparation thread turning process, owing to the intrinsic helical trajectory of point of a knife and the helix of the screw thread to be repaired of random installation on the fixing main shaft do not overlap the random button problem of the screw thread that produces.
Technical scheme: the present invention realizes through following technical scheme:
A kind of numerical control screw thread is repaired the adjusting device of the intrinsic helical trajectory of point of a knife on the lathe spindle, and it is characterized in that: this device mainly comprises lathe bed, headstock and tail platform; Headstock and tail platform are arranged on the lathe bed; Be horizontally installed with the main shaft that can rotate in the headstock; Rear side at headstock is provided with the rotating spindle encoder of driven by servomotor lower casing, chuck and back chuck before on the front-end and back-end of main shaft, being separately installed with; Also be provided with carriage in a side of lathe bed and organize carrying roller more; Be provided with the locating cone device at the tail platform towards an end of headstock, between headstock and tail platform, also be provided with the phase-detection sensor that is used for screw thread phase place detection of electrons location.
The tail platform is arranged on the lathe bed through what guide rail can move forward and backward, on lathe bed, also is provided with to promote the hydraulic jack that the tail platform moves forward and backward.
The locating cone device when using with workpiece to be repaired axially and the structure of radial location.
The locating cone device is for can be enclosed within the locating cone nested structure on the external screw thread to be repaired, and the internal diameter of this locating cone device matches with the major diameter of thread of external screw thread workpiece to be repaired.
The locating cone device is for putting in the locating cone axle construction of inside tapered thread to be repaired, and the external diameter of this locating cone device matches with the bottom diameter of internal thread workpiece to be repaired.
The phase-detection sensor is contact or noncontacting proximity sensor.
Spindle encoder is 1:1 with the spindle ratio.
Use above-mentioned numerical control screw thread and repair the moving method that numerical control screw thread that the adjusting device of the intrinsic helical trajectory of point of a knife on the lathe implements is repaired the intrinsic helical trajectory of point of a knife on the lathe; It is characterized in that: the step of this method is following: workpiece to be repaired is passed before main shaft and the back chuck behind the chuck, reach front-end of spindle, the tail platform moves forward under the promotion of hydraulic jack; The locating cone device that tail platform front end is installed matches with the old taper thread of workpiece front end; Successively clamp back chuck and preceding chuck, return the tail platform, at this moment; Axial and the radial position that is installed to the workpiece old thread to be repaired on the main shaft is confirmed by the locating cone device that circumferential position still is a random law.Utilize screw thread phase place detection of electrons alignment sensor; Measure the height point or the low spot of helix on the specific bus of screw thread and confirm the screw thread phase place to the fixedly end face distance of screw thread; If before measured and certain low spot of being stored in the intrinsic cutting helical trajectory of lathe spindle in the phase detection device to the screw thread end face distance is
; And this distance of this workpiece of this measurement is
, and then the screw thread to be repaired of this clamping to the phase difference
of the intrinsic screw cutting track of point of a knife on the main shaft is:
Wherein:
is pitch;
0?≤
＜360°
Make driven by servomotor spindle encoder housing rotation
degree angle (spending angle) even
rotated in the absolute position of encoder " 0 " position signalling; At this moment; Intrinsic point of a knife cutting helical trajectory on the lathe spindle just be clamped to that drilling rod on the lathe spindle chuck, drill collar workpiece etc. are existing to have that the helix of old thread to be repaired coincides on the whorl work piece, workpiece location and installation work completion.
When screw thread to be repaired was external screw thread, the locating cone device was for being enclosed within the peripheral structure of screw thread to be repaired, and the internal diameter of locating cone device matches with the external diameter of screw thread to be repaired.
When screw thread to be repaired was internal thread, the locating cone device was for can put in the structure in the screw thread to be repaired, and the external diameter of locating cone device matches with the internal diameter of internal thread to be repaired.
Advantage and effect:
The present invention provides a kind of and repairs the device and method that changes the intrinsic helical trajectory phase place of point of a knife on the main shaft on the lathe at the numerical control screw thread, mainly comprises two parts such as encoder turn device and electronics phase detection device.The present invention will be fixedly mounted on the encoder stator casing structure on the headstock originally; Changing into the encoder stator casing can rotate with respect to headstock housing; This rotates by a driven by servomotor, and screw thread phase data control to be processed obtains the angle of rotation according to detected workpiece by digital control system.Slewing area is in
.
Drilling rod workpiece when an old thread to be repaired; In the lathe spindle hole, confirmed after axial location and the radial position; Clamp back, two chucks of front end; This moment, workpiece was clamped on the main shaft, and the axial and radial position of workpiece is definite, but the circumferential phase of its screw thread to be repaired still presents random law.At this moment, use the phase place that electronics phase detection device among the present invention is measured the workpiece to be repaired screw thread of random installation to the main shaft.Point of a knife spiral movement locus on these detection data and the known before main shaft is compared, obtain its phase difference.Digital control system control servomotor driving main shaft encoder shell rotates; The angle of rotating equals this phase difference value; Apparatus and method have realized the adjustment and the change of the intrinsic helical trajectory of point of a knife on the main shaft according to this; Realize the specification requirement that intrinsic point of a knife cutting helical trajectory and the threaded line that is installed to old drilling rod to be repaired on the lathe spindle chuck on the main shaft coincide, and then reached the target that cutted thread is repaired in numerical control.The present invention can realize the numerical control reparation turning of old thread to be repaired; The accuracy of screw machining that it integrates numerically controlled lathe is high, surface quality is good, the screw thread of advantage of high processing efficiency and mechanical lathe is repaired the advantage that the radial cutting amount is little, the run of steel loss is little, and the present invention has significantly improved technical merit, quality level and economic benefit that drill rod thread is repaired.
Description of drawings:
Fig. 1 is a structural representation of the present invention.
The specific embodiment:Below in conjunction with accompanying drawing the present invention is done further description:
As shown in Figure 1, the present invention provides a kind of numerical control screw thread to repair the adjusting device of the intrinsic helical trajectory of lathe spindle point of a knife, and this device mainly comprises lathe bed 1, headstock 8 and tail platform 3; Headstock 8 is arranged on the lathe bed 1 with tail platform 3, is horizontally installed with the main shaft 7 that can rotate in the headstock 8, chuck 6 and back chuck 9 before the front-end and back-end of main shaft 7 are separately installed with; Side at lathe bed 1 also is provided with the carriage with many group carrying rollers 10; Be provided with locating cone device 4 at tail platform 3 towards an end of headstock 8, between headstock 8 and tail platform 3, also be provided with the phase-detection sensor 11 that is used for screw thread phase place detection of electrons location.At the rear side of headstock 8, be provided with the rotating spindle encoder 12 of driven by servomotor lower casing.Phase-detection sensor 11 is contact or noncontacting proximity sensor.Spindle encoder 12 is 1:1 with main shaft 7 gearratios.
Tail platform 3 is arranged on the lathe bed 1 through what guide rail can move forward and backward, on lathe bed 1, also is provided with to promote the hydraulic jack 2 that tail platform 3 moves forward and backward.Locating cone device 4 when using with workpiece to be repaired axially and the structure of radial location.
Locating cone device 4 is two kinds, as follows:
Locating cone device 4 is for can be enclosed within the locating cone nested structure on the outer cone thread to be repaired, and the internal diameter of this locating cone device matches with the major diameter of thread of external screw thread workpiece to be repaired.
Locating cone device 4 is for putting in the locating cone axle construction of inside tapered thread to be repaired, and the external diameter of this locating cone device matches with the bottom diameter of internal thread workpiece to be repaired.
Situation when being external screw thread for the taper thread of desire reparation on the workpiece 5 shown in the accompanying drawing, at this moment locating cone device 4 is the inner conical drogue of plate shape; If when desire was repaired taper thread and is internal thread on the workpiece 5, then the part of label 4 was a locating shaft just, the state that to be workpiece 5 cooperating with positioning sleeve shown in the accompanying drawing.
The present invention also provides a kind of measurement data through the detection and location device to implement the workpiece localization method of the intrinsic helical trajectory adjustment of point of a knife on the main shaft in addition; The step of this method is following: organize at carriage under the effect of carrying roller 10 more; After the old taper thread of workpiece 5 front ends partly passed main shaft 7 and back chuck 9 and preceding chuck 6; Reach the locating cone device place that is installed in tail platform front end, tail platform 3 moves to spindle end under the promotion of hydraulic jack 2, and the old taper thread of workpiece 5 front ends matches with the locating cone device.When workpiece screw thread to be repaired was external screw thread, the locating cone device was for being enclosed within the peripheral structure of screw thread to be repaired, and the internal diameter of locating cone device matches with the external diameter of screw thread to be repaired; When screw thread to be repaired was internal thread, the locating cone device was for can put in the structure in the screw thread to be repaired, and the external diameter of locating cone device matches with the internal diameter of internal thread to be repaired.At this moment, the workpiece old thread with respect to main shaft axially, radially all definite with circumferential position, but circumferential position is at random.Successively clamp back chuck 9 and preceding chuck 6, hydraulic jack 2 drives tail platform 3 and retreats into the position, back, has accomplished the clamping process of workpiece.Utilize screw thread phase place detection of electrons alignment sensor; Measure the height point or the low spot of helix on the specific bus of screw thread and confirm the screw thread phase place to the fixedly end face distance of screw thread; If before measured and certain low spot of being stored in the intrinsic cutting helical trajectory of point of a knife on the lathe spindle in the phase detection device to the screw thread end face distance is
; And this distance of this workpiece of this measurement is
, and then the screw thread to be repaired of this clamping to the phase difference
of intrinsic point of a knife screw cutting track on the main shaft is:
Wherein:
is pitch;
0?≤
＜360°
Make driven by servomotor spindle encoder housing rotation
degree angle (spending the angle) even
rotated in the absolute position of encoder " 0 " position signalling; At this moment; Intrinsic point of a knife cutting helical trajectory on the lathe spindle just be clamped to that drilling rod on the lathe spindle chuck, drill collar workpiece etc. are existing to have that the helix of old thread to be repaired coincides on the whorl work piece, workpiece location and installation work completion.
Guarantee thus in follow-up thread turning process; Point of a knife can align in the groove of old thread; In the relative turning campaign of spiral of cutter and workpiece, guarantee that the two sides of old angular thread can be cut one deck equably by cutter, arrive the job requirement of repairing screw thread.
After application apparatus of the present invention have been shown in the accompanying drawing, the critical piece relevant on the lathe with the positioning and clamping workpiece, parts such as the saddle on the lathe, slide plate, knife rest are not done and are given unnecessary details.
Claims (11)
1. a numerical control screw thread is repaired the adjusting device of the intrinsic helical trajectory of point of a knife on the lathe spindle, and it is characterized in that: this device mainly comprises lathe bed (1), headstock ⑻ and tail platform ⑶; Headstock ⑻ and tail platform ⑶ are arranged on the lathe bed (1); Be horizontally installed with the main shaft (7) that can rotate in the headstock (8); Rear side at headstock (8) is provided with the rotating spindle encoder of driven by servomotor lower casing (12), on the front-end and back-end of main shaft (7), is separately installed with preceding chuck (6) and back chuck (9); Also be provided with carriage in a side of lathe bed (1) and organize carrying roller (10) more; Be provided with locating cone device ⑷ at tail platform ⑶ towards the end of headstock ⑻, between headstock ⑻ and tail platform ⑶, also be provided with the phase-detection sensor ⑾ that is used for screw thread phase place detection of electrons location.
2. numerical control screw thread according to claim 1 is repaired the adjusting device of the intrinsic helical trajectory of point of a knife on the lathe; It is characterized in that: tail platform ⑶ is arranged on the lathe bed (1) through what guide rail can move forward and backward, on lathe bed (1), also is provided with to promote the hydraulic jack ⑵ that tail platform ⑶ moves forward and backward.
3. numerical control screw thread according to claim 1 is repaired the adjusting device of the intrinsic helical trajectory of point of a knife on the lathe, it is characterized in that: locating cone device ⑷ when using with workpiece to be repaired axially and the structure of radial location.
4. numerical control screw thread according to claim 3 is repaired the adjusting device of the intrinsic helical trajectory of point of a knife on the lathe; It is characterized in that: locating cone device ⑷ is for can be enclosed within the locating cone nested structure on the external screw thread to be repaired, and the internal diameter of this locating cone device matches with the major diameter of thread of external screw thread workpiece to be repaired.
5. numerical control screw thread according to claim 3 is repaired the adjusting device of the intrinsic helical trajectory of point of a knife on the lathe; It is characterized in that: locating cone device ⑷ is for putting in the locating cone axle construction of inside tapered thread to be repaired, and the external diameter of this locating cone device matches with the bottom diameter of internal thread workpiece to be repaired.
6. numerical control screw thread according to claim 1 is repaired the adjusting device of the intrinsic helical trajectory of point of a knife on the lathe, and it is characterized in that: phase-detection sensor ⑾ is contact or noncontacting proximity sensor.
7. numerical control screw thread according to claim 1 is repaired the adjusting device of the intrinsic helical trajectory of point of a knife on the lathe, it is characterized in that: spindle encoder (12) is 1:1 with main shaft (7) gearratio.
8. the numerical control screw thread implemented of the application rights adjusting device that requires 1 described numerical control screw thread to repair the intrinsic helical trajectory of point of a knife on the lathe is repaired the moving method of the intrinsic helical trajectory of point of a knife on the lathe; It is characterized in that: the step of this method is following: after workpiece to be repaired (5) is passed main shaft ⑺ and the back preceding chuck of chuck (9) (6); Reach front-end of spindle; Tail platform (3) moves forward under the promotion of hydraulic jack (2), and the locating cone device that tail platform front end is installed matches with the old taper thread of workpiece (5) front end, successively clamps back chuck (9) and preceding chuck (6); Return tail platform (3); At this moment, the axial and radial position that is installed to workpiece to be repaired (5) old thread on the main shaft (7) is confirmed by the locating cone device that circumferential position still is a random law.
9. utilize screw thread phase place detection of electrons alignment sensor; Measure the height point or the low spot of helix on the specific bus of screw thread and confirm the screw thread phase place to the fixedly end face distance of screw thread; If before measured and certain low spot of being stored in the intrinsic cutting helical trajectory of lathe spindle in the phase detection device to the screw thread end face distance is
; And this distance of this workpiece of this measurement is
, and then the screw thread to be repaired of this clamping to the phase difference
of the intrinsic screw cutting track of point of a knife on the main shaft is:
Wherein:
is pitch;
0?≤
＜360°
Make driven by servomotor spindle encoder housing rotation
degree angle (spending angle) even
rotated in the absolute position of encoder " 0 " position signalling; At this moment; Intrinsic point of a knife cutting helical trajectory on the lathe spindle just be clamped to that drilling rod on the lathe spindle chuck, drill collar workpiece etc. are existing to have that the helix of old thread to be repaired coincides on the whorl work piece, workpiece location and installation work completion.
10. numerical control screw thread according to claim 7 is repaired the moving method of the intrinsic helical trajectory of point of a knife on the lathe; It is characterized in that: when screw thread to be repaired is external screw thread; The locating cone device is for being enclosed within the peripheral structure of screw thread to be repaired, and the internal diameter of locating cone device matches with the external diameter of screw thread to be repaired.
11. numerical control screw thread according to claim 7 is repaired the moving method of the intrinsic helical trajectory of point of a knife on the lathe; It is characterized in that: when screw thread to be repaired is internal thread; The locating cone device is for can put in the structure in the screw thread to be repaired, and the external diameter of locating cone device matches with the internal diameter of internal thread to be repaired.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210116915.XA CN102814511B (en) | 2012-04-20 | 2012-04-20 | Numerical control screw thread repairs the detection adjusting apparatus and method of helical trajectory on lathe spindle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210116915.XA CN102814511B (en) | 2012-04-20 | 2012-04-20 | Numerical control screw thread repairs the detection adjusting apparatus and method of helical trajectory on lathe spindle |
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| CN102814511A true CN102814511A (en) | 2012-12-12 |
| CN102814511B CN102814511B (en) | 2017-03-15 |
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Cited By (3)
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| TWI494183B (en) * | 2013-04-30 | 2015-08-01 | Cnc lathe system for accelerated screw thread-cutting | |
| CN107824910A (en) * | 2017-11-30 | 2018-03-23 | 台州职业技术学院 | A kind of internal thread helix initial angle positioner |
| CN110000432A (en) * | 2019-03-20 | 2019-07-12 | 韶关市汇建水泥制品有限公司 | A kind of screw recycling automatic repariring equipment |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI494183B (en) * | 2013-04-30 | 2015-08-01 | Cnc lathe system for accelerated screw thread-cutting | |
| CN107824910A (en) * | 2017-11-30 | 2018-03-23 | 台州职业技术学院 | A kind of internal thread helix initial angle positioner |
| CN107824910B (en) * | 2017-11-30 | 2024-01-23 | 台州职业技术学院 | Internal thread helix initial angle positioner |
| CN110000432A (en) * | 2019-03-20 | 2019-07-12 | 韶关市汇建水泥制品有限公司 | A kind of screw recycling automatic repariring equipment |
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| Publication number | Publication date |
|---|---|
| CN102814511B (en) | 2017-03-15 |
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