CN117697319A

CN117697319A - Clamping device of large-diameter spiral welded pipe single-head chamfering machine and positioning and calibrating method thereof

Info

Publication number: CN117697319A
Application number: CN202311801959.0A
Authority: CN
Inventors: 夏双林; 房永亮; 周英; 李雪
Original assignee: Inner Mongolia Juncheng Xingye Pipeline Co ltd
Current assignee: Inner Mongolia Juncheng Xingye Pipeline Co ltd
Priority date: 2023-12-26
Filing date: 2023-12-26
Publication date: 2024-03-15

Abstract

The clamping device comprises a fixed pipe clamp, an adjustable pipe clamp and a deviation correcting mechanism, wherein the fixed pipe clamp clamps the near end of the spiral welded pipe, the adjustable pipe clamp clamps the far end of the spiral welded pipe, the adjustable pipe clamp takes the clamping position of the fixed pipe clamp as a circle center, and the clamping axis of the adjustable pipe clamp can be rotatably adjusted relative to the axis of the cutterhead by taking the distance between the adjustable pipe clamp and the fixed pipe clamp as a radius; the deviation correcting mechanism is fixedly arranged above the modulated pipe clamp and is used for correcting the clamping axis of the modulated pipe clamp relative to the axis of the cutter head; the modulated pipe clamp comprises an adjustable pipe clamp or the modulated pipe clamp comprises a fixed pipe clamp and an adjustable pipe clamp. The clamping device can realize the clamping precision that the parallelism of the clamping axis of the spiral welded pipe relative to the axis of the cutter head is less than or equal to 0.02mm.

Description

Clamping device of large-diameter spiral welded pipe single-head chamfering machine and positioning and calibrating method thereof

Technical Field

The invention relates to the technical field of spiral welded pipe manufacturing, in particular to a clamping device of a single-head chamfering machine for a large-diameter spiral welded pipe and a positioning and calibrating method thereof.

Background

The spiral welded pipe is mainly used for long-distance transportation of petroleum, natural gas, domestic water and other resources. The length of a single spiral welded pipe is usually 12 meters, and a plurality of spiral welded pipes are required to be welded in an end-to-end mode in actual use, so that the two sections of the spiral welded pipe are required to be subjected to flat head and groove treatment according to the related welding technical requirements. The flat head chamfering machine is an indispensable processing device in a steel pipe finishing line, is mainly used for chamfering the pipe end and processing the flat end surface of a spiral welded pipe, has high precision and mainly depends on a clamp and a cutter, and particularly, the large-diameter spiral welded pipe is easy to have processing errors of inclination of the end surface and the bevel.

In the course of the prior art,

(1) And the hinged enclasping mode is easy to slip.

The clamp of the spiral welded pipe chamfering machine usually adopts a clamping mode that two clamp arms are clasped along the vertical diameter. In the clamping mode, when the wall thickness of the spiral welded pipe is large, the spiral welded pipe is easy to slip, so that the feed amount is reduced, the working efficiency is reduced, and the length of the reverse slope opening and the flat end surface is more than 30 minutes. At the same time, the chamfering accuracy is also affected. On the other hand, before the welded pipe enters the chamfering machine, the spiral welded pipe is required to be quickly retracted by a larger distance through the operation of the traversing device, so that the welded pipe cannot touch the chamfering machine when entering the clamp.

(2) No matter the upper and lower clamping or the left and right clamping, the coaxial line of the center line of the steel pipe and the axis of the chamfering cutter head cannot be ensured.

A major diameter spiral welded pipe is 12 meters long, and the steel pipe falls into the backing roll way by driving the pipe ware perpendicular to chamfer spindle line, and at this moment, the steel pipe gets into anchor clamps and need the backing roll rotation to realize that the steel pipe axially gets into anchor clamps, and this entering can not guarantee that steel pipe axis and blade disc axis coaxial line, accomplish parallelism at least and satisfy, and the most preferably is the coaxial line, whether press from both sides tightly from top to bottom or from side to side tightly, and spiral welded pipe axis and blade disc axis only need have a certain contained angle slightly, and then the benchmark mistake reflects that pipe end and groove all incline very greatly on the major diameter steel pipe of 2-3 meters, leads to the pipe end processing disqualification.

(3) When roundness is error, the multipoint contact causes clamping loose.

When the roundness of the port of the spiral welded pipe is in error, the clamp jaw is an arc surface formed by a plurality of contact points, so that the circumferential surface of the spiral welded pipe is not matched with the arc surface of the jaw, and the clamp is not tight. The screw welded pipe can be clamped well despite errors in roundness.

Therefore, the technical scheme is that the welding pipe clamp is tightly needed in the field, clamping is not slipped on the premise of ensuring that the central line of a spiral welding pipe is coaxial with the axis of a chamfering cutter head, the roundness does not influence the clamping of the spiral welding pipe, and the clamping becomes a key problem of breakthrough of the clamp of the traditional spiral welding pipe chamfering machine.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the clamping device of the single-head chamfering machine for the large-diameter spiral welded pipe, which can ensure that the center line of the spiral welded pipe is coaxial with the axis of the chamfering cutter head, the clamping is not slipped, and the roundness does not influence the technical problem of clamping.

The invention aims at realizing the purposes that a clamping device of a large-diameter spiral welded pipe single-head chamfering machine is arranged on a fixed base, the spiral welded pipe is near to the end of a cutter head and far away from the end of the cutter head, and comprises

The fixed pipe clamp comprises a fine clamp pair and is used for clamping the near end of the spiral welded pipe in high parallelism with the axis of the cutter head spindle;

the adjustable pipe clamp is used for clamping the far end of the spiral welded pipe under the same clamping plane with the fixed pipe clamp, and the adjustable pipe clamp takes the clamping position of the fixed pipe clamp as a circle center and takes the distance between the adjustable pipe clamp and the fixed pipe clamp as a radius to rotatably adjust the clamping axis of the adjustable pipe clamp relative to the axis of the cutter head;

the deviation correcting mechanism is fixedly arranged above the modulated pipe clamp and is used for correcting the clamping axis of the modulated pipe clamp relative to the axis of the cutter head;

the modulated pipe clamp comprises an adjustable pipe clamp or the modulated pipe clamp comprises a fixed pipe clamp and an adjustable pipe clamp.

The movable base comprises a movable bottom plate, an arc base and an arc groove, the movable bottom plate is fixedly connected with the arc base, the arc base is in rolling fit in the arc groove, the arc groove is an arc which takes the intersection point of the central line cross section of the fixed pipe clamp and the axis of the cutter head as the center of a circle and takes the distance between the arc base and the fixed pipe clamp as the radius, and the arc is axisymmetric relative to the axis of the cutter head; the adjustable pipe clamp is fixedly arranged on the movable bottom plate.

Further, the fine clamp pair comprises an upper clamp, a lower clamp, a force application oil cylinder and two first guide posts, wherein the lower clamp is fixedly arranged on the fixed base together with the two first guide posts penetrating through the lower clamp, the upper clamp and the lower clamp are vertically opposite to each other and slidingly arranged on the two first guide posts, and the outer sides of the first guide posts are fixedly connected with the upper clamp and the lower clamp through the force application oil cylinder.

Further, the correction mechanism comprises two correction guide posts, a cross beam and a sliding block, the lower surface of the sliding block is fixedly provided with a correction wedge, the correction wedge is provided with a wedge groove, the wedge groove is symmetrically provided with two splayed inclined planes which are inclined outwards, and the correction wedge is fixed on the lower surface of the sliding block through the symmetrical central line of the splayed inclined planes and the axial line of the cutter head in a parallel degree of less than 0.02 mm; the cross beam is provided with at least 3 calibration cylinders, the piston of each calibration cylinder is hinged with a transition block, and the transition blocks are fixedly connected with the sliding blocks; two guide sliding inclined planes are symmetrically arranged on the upper part of the second upper clamp on the clamping axis, and the calibration oil cylinder drives the calibration inclined wedge to move downwards until the splayed inclined plane is completely attached to the guide sliding inclined plane to the bottom dead center.

Further, the device also comprises a detection mechanism, wherein the detection mechanism detects whether the position of the deviation correcting mechanism is correct in the working state; the detection mechanism comprises a laser transmitter, a laser receiver and a notifier, wherein the laser transmitter is arranged above the spindle motor and emits laser parallel to the axis of the cutterhead, and the laser receiver is arranged right above the symmetrical central line of the standard inclined wedge and is correspondingly provided with the laser receiver.

Further, the fixed pipe clamp further comprises a pair of pre-clamps, and the pair of fine clamps and the clamping axis of the pair of pre-clamps are coaxially and fixedly arranged on the rotary support at intervals front and back; when the clamping device is in a deviation correcting state, the pre-clamping pair is used for ensuring that the clamping plane clamps the proximal end of the spiral welded pipe; when the clamping device is in a machining state, the fine clamp pair is used for clamping the near end of the spiral welded pipe in a manner of ensuring the parallelism between the clamping axis and the spindle axis of the cutterhead on the premise of the same clamping plane.

Further, the pre-clamp pair comprises a left V-clamp and a right V-clamp, the lower parts of the left V-clamp and the right V-clamp are driven by a screw nut pair, and the screw nut pair is fixedly arranged on the rotary support.

A positioning calibration method for a clamping device of a large-diameter spiral welded pipe single-head chamfering machine comprises the following step S1 of pre-clamping a steel pipe

The large-diameter spiral welded pipe is sent into a clamping device, and a fixed pipe clamp and an adjustable pipe clamp respectively clamp the proximal end and the distal end of the spiral welded pipe;

s2 deviation rectifying and positioning

Starting the correction mechanism, enabling the correction oil cylinder to drive the sliding block and the correction inclined wedge to move downwards, enabling the splayed inclined surface of the wedge-shaped groove to be in sliding fit with the sliding guide inclined surface of the second upper clamp until the sliding guide inclined surface is abutted against the bottom dead center, and correcting the clamping axis of the adjustable pipe clamp to meet the parallelism requirement with the axis O-O of the cutter disc;

s3, detecting whether the position is correct

The detection mechanism is started, the laser transmitter emits laser, and the control mechanism repeatedly inquires whether the laser receiver receives a laser signal; if yes, starting a notifier, and executing a step S4; if not, the notifier alarms and stops executing the positioning calibration method;

s4, processing end face and groove

And starting the spindle motor, rotating the cutter disc, feeding, and processing the end surface and the groove.

Further, in step S1, the pipe clamp is fixed) the clamped coil-welded pipe is a pair of pre-clamp clamping coils-welded pipe; also included between steps S3 and S4 is step S31 of finely clamping the coil, i.e., the pair of fine clamps securing the tube clamp the proximal end of the coil, and then the pair of pre-clamps unclamping the proximal end of the coil.

Further, the two deviation correcting mechanisms are respectively arranged above the fixed pipe clamp and the adjustable pipe clamp;

step S2, firstly adjusting a far end, starting a deviation correcting mechanism above the adjustable pipe clamp, and calibrating a clamping axis of the adjustable pipe clamp to meet the parallelism requirement with the axis O-O of the cutter head; and then adjusting the proximal end, starting a correction mechanism above the fixed pipe clamp, and calibrating the clamping axis of the fixed pipe clamp to be in parallel with the axis O-O of the cutterhead.

The utility model provides a clamping device of major diameter spiral welded pipe single-end chamfer machine, cooperates the adjustable pipe clamp through fixed pipe clamp, but in the intraductal axis both sides rotatable regulation of blade disc in clamp plane with the axiality of correcting the axis of the long spiral steel pipe of whole 12 meters and blade disc axis, can realize the spiral welded pipe and press from both sides tight axis for the tight axiality of blade disc axis less than or equal to 0.02 mm's of clamping precision, press from both sides tightly simple reliable, has very big practical value.

Drawings

FIG. 1 is a front view of an embodiment 1 of a clamping device of a single-head chamfering machine for large diameter spiral welded pipes in accordance with the present invention;

FIG. 2 is a cross-sectional view A-A of FIG. 1 of an embodiment 1 of a clamping device of a single-head chamfering machine for large diameter spiral welded pipe in accordance with the present invention;

fig. 3 is a cross-sectional view B-B of fig. 1 of an embodiment 1 of a clamping device of a single-head chamfering machine for large diameter spiral welded pipes according to the present invention.

FIG. 4 is a schematic diagram showing alignment of embodiment 1 of a clamping device of a single-head chamfering machine for large diameter spiral welded pipe in accordance with the present invention;

fig. 5 is a front view of example 2 of a clamping device of a single-head chamfering machine for large diameter spiral welded pipes according to the present invention.

Fig. 6 is a cross-sectional view E-E of fig. 5 of example 2 of a clamping device of a single-head chamfering machine for large diameter spiral welded pipe in accordance with the present invention.

Reference numerals in the above figures:

1 fixed base, 2 cutter head, 3 supporting roller, O-O cutter head axis, w-w spiral welded pipe axis, c-c symmetrical central line, w spiral welded pipe

10 fixed pipe clamps, 11 pre-clamping pairs, 12 fine clamping pairs, 13 upper clamping devices, 14 lower clamping devices, 15 force-applying cylinders, 16 first guide posts, 17 clamping sleeve pads, 18 screw nut pairs and 19 rotary supports

11.1 left V-clamp and 11.2 right V-clamp

20 adjustable pipe clamps, 21 second upper clamps, 22 second lower clamps, 23 second guide posts, 24 second oil cylinders, 25 elastic frames, 26 portal frames, 27 diagonal support frames and 28 cantilever frames

30 movable base, 31 movable bottom plate, 32 circular arc base, 33 circular arc groove, 34 rolling support

40 deviation correcting mechanism, 41 calibration guide post, 42 cross beam, 43 slide block, 44 calibration wedge, 45 wedge groove, 46 splayed inclined plane, 47 guide slide inclined plane, 48 calibration oil cylinder and 49 transition block

50 detection means, 51 laser transmitter, 52 laser receiver, 53 notifier.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings, which are not intended to limit the scope of the invention.

Example 1

The utility model provides a clamping device of major diameter spiral welded tube single-end chamfering machine, single-end chamfering machine includes blade disc 2 and backing roll 3, and blade disc 2 and backing roll 3 set firmly in fixed base 1, and spiral welded tube axis and blade disc axis are approximately coaxial roll support on backing roll 3, and spiral welded tube is close the blade disc end and is the near-end, and spiral welded tube is kept away from the blade disc end and is the distal end, includes

The fixed pipe clamp 10 is fixedly arranged on the fixed base 1, and the fixed pipe clamp 10 comprises a fine clamp pair 12, wherein the fine clamp pair 12 is used for clamping the proximal end of the spiral welded pipe in parallel with the axis of the cutter head spindle;

the adjustable pipe clamp 20 can be adjustably arranged on the fixed base 1 through the movable base 30, and the adjustable pipe clamp 20 clamps the distal end of the spiral welded pipe by taking the intersection point of the central line cross section of the fixed pipe clamp 10 and the axis of the cutterhead as the center of a circle and taking the distance between the adjustable pipe clamp and the fixed pipe clamp as the radius adjustable clamping axis; the clamping axes of the adjustable pipe clamp 20 and the fixed pipe clamp 10 are always located at the same height.

A movable base 30, the movable base 30 including a movable bottom plate 31, an arc base 32, and an arc groove 33, the movable base 30 for stably supporting the adjustable pipe clamp 20;

the deviation correcting mechanism 40 is fixedly arranged right above the adjustable pipe clamp 20, and the deviation correcting mechanism 40 can correct the clamping axis of the adjustable pipe clamp 20 relative to the axis of the cutter head spindle through matching with the adjustable pipe clamp 20.

The detecting mechanism 50 and the detecting mechanism 40 detect whether the position of the deviation rectifying mechanism 40 is correct in the working state.

The fixed pipe clamp 10 comprises a pair of fine clamps 12, and the fixed pipe clamp 10 is fixedly mounted on the fixed base 1. The fine clamp pair 12 comprises an upper clamp 13, a lower clamp 14, a force application cylinder 15 and two first guide posts 16, wherein the lower clamp 14 and the two first guide posts 16 are fixedly arranged on the fixed base 1, the upper clamp 13 is arranged on the two first guide posts 16 in a sliding manner in a manner of being opposite to each other up and down on the lower clamp 14, and the outer sides of the first guide posts 16 are fixedly connected with the upper clamp 13 and the lower clamp 14 through the force application cylinder 15; the piston of the force application cylinder 15 extends out, the upper clamp 13 moves upwards, and the fine clamp pair 12 is opened; the piston of the force application oil cylinder 15 retreats, the upper clamp 13 moves downwards, and the spiral welded pipe is clamped; the upper clamp 13 is provided with a clamping sleeve cushion 17 at the position opposite to the center. The clamping sleeve cushion comprises a cushion block plate and a rubber cushion, the thickness of the rubber cushion is larger than the height of the screw edge, and the clamping sleeve cushion can be tightly pressed even if pressed on the screw edge. The upper clamp 13 and the lower clamp 14 are semicircular jaws, and the upper clamp and the lower clamp are opposite to each other up and down to form a whole circle.

The adjustable pipe clamp 20 is adjustably mounted on the fixed base 1 and is realized as: the fixed base 1 is provided with an arc groove 33, the arc groove 33 is an arc which takes the intersection point of the central line cross section of the fixed pipe clamp 10 and the axis of the cutterhead as the circle center and takes the distance between the fixed pipe clamp and the axis of the cutterhead as the radius, and the arc is axisymmetric with respect to the axis of the cutterhead; the circular arc base 32 is in guiding fit with the circular arc groove 33, at least three rolling supports 34 are arranged at the bottom of the circular arc base 32, the rolling supports 34 are symmetrically arranged about the axis of the cutterhead, namely, the rolling supports 34 at two sides are axisymmetric about the axis of the cutterhead, and the rolling support 34 in the middle is approximately positioned on the axis of the cutterhead.

In order to obtain stable support, the two circular arc bases 32 are arranged right below the adjustable pipe clamp 20 at intervals, the second lower clamp 22 is fixedly arranged on the movable bottom plate 31, two sides of the movable bottom plate 31 are connected with the second lower clamp 22 through diagonal bracing ribs 28, the two circular arc bases 32 are fixedly connected to the lower surface of the movable bottom plate 31, the length of the movable bottom plate 31 along the axis perpendicular to the cutter head is about twice that of the adjustable pipe clamp 20, and the distance between the two circular arc bases 32 along the axis of the cutter head is greater than or equal to 1.5m.

The adjustable pipe clamp 20 comprises a second upper clamp 21 and a second lower clamp 22, and the second lower clamp 22 is fixedly arranged on the movable base 30. The second guide post 23 is fixedly arranged on the second upper clamp 21, and the second lower clamp 22 is in sliding fit with the second guide post 23. The second oil cylinder 24 is fixedly connected between the second lower clamp 22 and the second upper clamp 21 at the outer side of the second guide post 23. The second upper clamp 21 is fixedly connected to the elastic frame 25. The elastic frame 25 is fixedly arranged on the movable base 30, the elastic frame 25 comprises a door-shaped support 26, an inclined support 27 and a cantilever support 28, the door-shaped support 26 and the inclined support 27 are fixed on the movable base plate, the cantilever support 28 horizontally extends forwards from the door-shaped support 26, and the lower part of the end part of the cantilever support 28 is fixedly connected with the second upper clamp 21 through bolts. In the free state, the second upper clamp 21 is fixed by the elastic frame 25 and is in the open state, and the corresponding second oil cylinder 24 extends out at the moment; when the clamping is needed, the piston of the second oil cylinder 24 retreats to drive the second upper clamp 21 to move downwards to clamp the spiral steel pipe, and the cantilever mount 28 of the elastic frame 25 is pulled to bend downwards to deform by the downward movement of the second upper clamp 21, but the clamping of the steel pipe is not affected. The buckling deformation is an elastic deformation, and when the second cylinder 24 is extended, the elastic deformation force and the force of the second cylinder move up the second upper clip 21. When both the fixed and adjustable clamps grip the spiral welded pipe, the support roller 3 moves down to the retracted position. The second lower clip 22 is provided with two lower clip sleeve pads 29. The second upper clamp 21 and the second lower clamp 22 are semicircular jaws, and form a whole circle.

The deviation correcting mechanism 40 comprises two calibration guide posts 41, a cross beam 42 and a sliding block 43, wherein a calibration wedge 44 is fixedly arranged on the lower surface of the sliding block 43, a wedge groove 45 is arranged on the calibration wedge 44, a symmetrical central line c-c is arranged on the wedge groove 45, two splayed inclined planes 46 which are inclined outwards are symmetrically arranged on two sides of the central line c-c, and the calibration wedge 44 is fixed on the lower surface of the sliding block 43 through the symmetrical central line c-c in a manner that the parallelism between the calibration wedge and the axis O-O of the cutter disc is smaller than 0.02 mm; two guide sliding inclined planes 47 are symmetrically arranged on the upper portion of the second upper clamp 21 and are symmetrical to the clamping axis, at least 3 calibration oil cylinders 48 are arranged on the cross beam 42, a piston of each calibration oil cylinder 48 is hinged to a transition block 49, and the transition blocks 49 are fixedly connected with the sliding blocks 43. When the pipe clamp 10 and the adjustable pipe clamp 20 are fixed to clamp the spiral welded pipe, the calibrating cylinder 48 drives the sliding block 43 and the calibrating inclined wedge 44 to move downwards, the splayed inclined surface 46 of the wedge groove 45 is finally matched with the guide inclined surface 47 of the second upper clamp 21 in a sliding manner, the clamping axis of the adjustable pipe clamp 20 is calibrated to meet the parallelism requirement with the cutter disc axis O-O, and the calibrating action is completed.

The detection mechanism 50 comprises a laser transmitter 51, a laser receiver 52 and a notifier 53, wherein the laser transmitter 51 is arranged above the spindle motor, emits laser parallel to the axis O-O of the cutter disc, the laser receiver 52 is arranged on the symmetrical central line w-w of the standard wedge 44, and the laser receiver 52 is correspondingly arranged on the laser transmitter 51. After the correction mechanism 40 finishes the calibration action, the laser transmitter 51 emits laser, the laser receiver 52 receives the laser, the beam 42 of the correction mechanism 40 is provided with a notifier 53 for displaying the qualification of the calibration, and the notifier 53 can be a sound for emitting wind sound, and can sound to indicate the success of the calibration, or can be a display lamp for lighting to indicate the success of the calibration. When the calibration is completed, the laser receiver 52 cannot receive the laser, indicating that the position of the calibration cam 44 has an error, and it is necessary to replace the guide post and guide sleeve system and re-check whether the mounting position of the standard cam 44 on the slider 43 is loose. And after all maintenance, the normal work can be carried out again.

Description of actions: the right side of the supporting roller 3 is also provided with a supporting roller way, the supporting roller way is a pipe feeding and turning station, the pipe feeding and turning station is responsible for driving a spiral welded pipe into the supporting roller way by using a transverse track pipe driving device, the supporting roller 3 rotates to drive the axis of the spiral welded pipe to advance into a fixed pipe clamp and an adjustable pipe clamp, the fixed pipe clamp 10 and the adjustable pipe clamp 20 clamp the spiral welded pipe until a certain distance is stopped before a large cutter disc, the deviation rectifying mechanism 40 descends, the splayed inclined surface is completely matched with the sliding guide inclined surface until the splayed inclined surface cannot be pressed down, at the moment, the parallelism between the clamping axis of the adjustable pipe clamp 20 and the axis of the cutter disc meets the parallelism less than or equal to 0.02mm, the detecting mechanism 50 sends a signal of successful calibration, and at the moment, the cutter feeding can process an end face and a groove. And (3) finishing the end face, loosening, lifting and supporting the spiral steel pipe by the supporting roller, reversely rotating the supporting roller, pouring the spiral welded pipe to a pipe inlet turning station, turning the spiral welded pipe around at the station, and feeding the other end face into the processing station for clamping, calibrating and end face processing.

In the prior art, a front pipe clamp and a rear pipe clamp are usually fixed guide posts, and the parallelism between the axis of a spiral welded pipe and the axis of a cutter head can be ensured as long as the front and rear fixed guide posts are installed according to a standard and clamped up and down. However, the rear tube clamp replaces the fixed guide post with a floating second guide post 23, which is responsible for the up and down clamping guide only, and for the parallelism which is handed over to the alignment guide post 41. It has been verified that the first guide post 16 and the second guide post 23 are most vulnerable, while the calibration guide post 41 is not damaged at all times. Since it is only responsible for rotating the adjustable pipe clamp through a small angle, which in turn acts on a large guiding ramp, the alignment guide 41 is very stressed. The second guide post 23 is clamped and receives axial force and also receives shearing force during deviation correction, and the shearing force drives the movable base 30 and the second lower pipe clamp to move, so that the second lower pipe clamp is stressed in a complex manner and is easy to damage.

Another unexpected advantage is that the damage to the second guide post 23 does not delay production, as it is a floating guide post, just like a pin, that can be removed and replaced. What is important is a fixed guide post and a calibration guide post. When the fixed guide post is out of order, immediate downtime for repair is required, as the fixed clamp is the datum for the adjustable clamp.

The clamping device of the single-head chamfering machine for the large-diameter spiral welded pipe has the meaning that the diameter of the spiral welded pipe is more than or equal to 800mm, and the diameter is preferably 820-4020 mm.

A positioning and calibrating method for a clamping device of a large-diameter spiral welded pipe single-head chamfering machine comprises the following steps:

s1 steel pipe pre-clamping

The large-diameter spiral welded pipe is fed into the fixed pipe clamp and the adjustable pipe clamp, the fixed pipe clamp 10 clamps the spiral welded pipe, and the adjustable pipe clamp 20 clamps the spiral welded pipe; the clamping device is in a deviation rectifying state;

s2 deviation rectifying and positioning

The deviation correcting mechanism 40 is started, the calibrating cylinder 48 drives the sliding block 43 and the calibrating inclined wedge 44 to move downwards, the splayed inclined surface 46 of the wedge-shaped groove 45 is finally matched on the sliding guide inclined surface 47 of the second upper clamp 21 in a sliding way until the sliding guide inclined surface abuts against the bottom dead center, and the clamping axis of the adjustable pipe clamp 20 is calibrated to meet the parallelism requirement with the cutter disc axis O-O;

s3, detecting whether the position is correct

The detection mechanism 50 is started, the laser transmitter 51 emits laser light, and the control mechanism repeatedly inquires whether the laser receiver 52 receives a laser signal; if yes, the notifier 53 is started to execute step S4; if not, the notifier 53 alarms and stops executing the positioning calibration method;

s4, processing end face and groove

Example 2

The pipe clamp is improved and fixed, the pre-clamping pair is additionally arranged, the pre-clamping pair and the fine clamping pair can rotate at fixed points, and other structures are the same as those of the embodiment.

A clamping device of a single-head chamfering machine for a large-diameter spiral welded pipe,

the fixed pipe clamp 10 further comprises a pre-clamping pair 11, wherein the pre-clamping pair 11 and the fine clamping pair 12 are arranged side by side along a clamping axis, and the pre-clamping pair 11 is used for ensuring that the clamping plane clamps the proximal end of the spiral welded pipe when the clamping device is in a deviation correcting state; when the clamping device is in a machining state, the fine clamp pair 12 is used for clamping the proximal end of the spiral welded pipe in a manner of ensuring that the clamping axis is parallel to the axis of the cutter head spindle on the premise of the same clamping plane. The clamping plane is the horizontal plane in which the clamping axis lies.

The lower clamper 14 is fixedly mounted on a rotary support 19 coaxially with the clamping axis of the pair of pre-clamps 11 and at a front-rear interval, and the rotary support 19 is rotatably mounted on the fixed base 1. The first guide post 16 is fixedly mounted to the upper clamp 13.

The pre-clamping pair 11 comprises a left V-shaped clamp 11.1 and a right V-shaped clamp 11.2 which are horizontally and oppositely arranged and are used for horizontally and oppositely applying force to two sides of a clamping axis to clamp the spiral steel pipe w, the lower parts of the left V-shaped clamp and the right V-shaped clamp are driven by a screw nut pair 18, and the screw nut pair 18 is fixedly arranged on a rotary support 19 respectively. The left V-shaped clamp and the right V-shaped clamp are arranged in a V-shaped way, and the left V-shaped clamp and the right V-shaped clamp are positioned in a V-shaped way relatively, so that the clamping plane of the spiral welded pipe is determined.

Two deviation correcting mechanisms 40 are provided above the fixed pipe clamp 10 and the adjustable pipe clamp 20, respectively. For the fixed pipe clamp 10, the symmetrical midline c-c of the wedge-shaped groove 45 of the deviation rectifying mechanism 40 is perpendicular to and intersects the pivot axis of the swivel support 19. The upper clamp 13 is also provided with a slide guiding inclined plane 47.

A positioning and calibrating method of a clamping device of a large-diameter spiral welded pipe single-head chamfering machine,

in step S1, the fixed pipe clamp 10 clamps the spiral welded pipe as the pair of pre-clamps 11 clamps the spiral welded pipe;

step S2, firstly adjusting the far end, starting a deviation correcting mechanism 40 above the adjustable pipe clamp 20, and calibrating the clamping axis of the adjustable pipe clamp 20 to meet the parallelism requirement with the cutter disc axis O-O; then adjusting the proximal end, starting a deviation correcting mechanism 40 above the fixed pipe clamp 10, and calibrating the clamping axis of the fixed pipe clamp 10 to meet the parallelism requirement with the cutter disc axis O-O; the clamping axis of the stationary pipe clamp 10 is the clamping axis of the fine pair of clamps 12.

Also included between step S3 and step S4 is a step S31 of finely clamping the coil, i.e., the pair of fine clamps 12 securing the tube clamp 10 clamp the coil proximal end, and then the pair of pre-clamps 11 unclamp the coil proximal end.

The principle of the positioning calibration component and the method of the clamping device is explained, in order to solve the technical problems of ensuring the coaxial line of the center line of the spiral welded pipe and the axis of the chamfer cutter disc, clamping without slipping and roundness without affecting the clamping, the following means are adopted:

(1) The fixed pipe clamp is matched with the adjustable pipe clamp, and the calibration mechanism is cooperated to realize the calibration of the axis included angle.

For a large-diameter spiral welded pipe, the fixed pipe clamp 10 clamps the proximal end, the adjustable pipe clamp 20 clamps the distal end, and when the fixed pipe clamp and the adjustable pipe clamp are clamped, the clamping axes are always positioned in the horizontal plane with the same height through the lower clamp 14, the second lower clamp 22 and the circular arc base 32; the angle α of the clamping axis of the adjustable pipe clamp relative to the cutterhead axis is then adjusted to 0 degrees, i.e. to meet the parallelism requirement, by means of the calibration mechanism 40. Because the parallelism of the center of symmetry c-c of the alignment wedge with the cutterhead axis O-O is less than 0.02mm, the parallelism of the clamping axis of the adjustable pipe clamp 20 at the distal end with the cutterhead axis can be forced to be less than 0.02mm. The fixing guide post of the fixing tube clamp 10 of embodiment 1 is fixed on the basis, so that the parallelism between the clamping axis of the fine clamping tube pair 12 at the proximal end and the cutter disc axis O-O is ensured to be less than 0.02mm. The fixed pipe clamp 10 of example 2 is rotatable, but the clamping axis of the clamp is forced to rotate to meet the parallelism requirement by the alignment of the distal end of the adjustable pipe clamp 20, and the clamping axis of the proximal end alignment mechanism 40 is also forced to meet the parallelism requirement and the function of pressing the weld screw during cutting. After the clamping device is continuously produced for 11 months, the non-verticality of the end face of the 820mm-4020mm large-diameter spiral welded pipe can still be smaller than or equal to 0.5+/-0.05 degrees after sampling measurement until the end face is overhauled, and the bevel angle reaches the allowable deviation of 0-1 degrees and the blunt edge width tolerance of +/-0.5 mm. The method for detecting the non-perpendicularity of the end face of the steel pipe comprises the following steps: one side of the right-angle turning ruler is attached to the outer surface of the steel pipe along the longitudinal direction of the steel pipe, the other side of the right-angle turning ruler passes through the center of a pipe cavity of the steel pipe, and the included angle between the side and the end face of the steel pipe is measured; and (3) carrying out position measurement according to the circumferential direction of the end face of the steel pipe in a plurality of times, wherein the measured maximum angle value is the non-perpendicularity of the steel pipe.

(2) The detection mechanism is matched with the calibration mechanism, so that the calibration positioning position is ensured to be correct.

The alignment mechanism 40 is present as soon as possible, but as the number of alignments increases to a certain level, the guide post, guide sleeve, wedge groove and slide guiding surface are worn to a certain extent, resulting in accuracy of the positioning accuracy. At this time, each calibration is not accurately measured, and the operator is unaware that the calibration mechanism 40 is not sufficiently accurate. Therefore, the detection mechanism 50 is able to measure whether the calibration mechanism 40 is properly positioned, and if not, alert that the component requiring high precision maintenance is required. This is the best way to properly utilize the cooperation of the calibration mechanism, the fixed clamp and the adjustable clamp. The precision can naturally return to meeting the requirements after the parts are replaced. Therefore, the detection mechanism is matched with the calibration mechanism, so that the calibration positioning position is ensured to be correct.

Claims

1. The utility model provides a clamping device of major diameter spiral welded tube single-end chamfering machine, locates fixed base (1), and spiral welded tube (w) is close to the blade disc end and is the near-end, and spiral welded tube (w) is kept away from the blade disc end and is the distal end, its characterized in that includes

The fixed pipe clamp (10), the fixed pipe clamp (10) comprises a fine clamp pair (12), and the fixed pipe clamp (10) is used for clamping the near end of the spiral welded pipe in high parallelism with the axis of the cutter head spindle;

the adjustable pipe clamp (20) is used for clamping the distal end of the spiral welded pipe under the same clamping plane with the fixed pipe clamp (10), and the adjustable pipe clamp (20) can rotationally adjust the clamping axis of the adjustable pipe clamp relative to the axis of the cutter head by taking the clamping position of the fixed pipe clamp as the center of a circle and taking the distance between the adjustable pipe clamp and the fixed pipe clamp as the radius;

the deviation correcting mechanism (40) is fixedly arranged above the modulated pipe clamp and is used for correcting the clamping axis of the modulated pipe clamp relative to the axis (O-O) of the cutter head;

the modulated pipe clamp comprises an adjustable pipe clamp (20) or the modulated pipe clamp comprises a fixed pipe clamp (10) and an adjustable pipe clamp (20).

2. The clamping device of the large-diameter spiral welded pipe single-head chamfering machine according to claim 1, further comprising a movable base (30), wherein the movable base (30) comprises a movable bottom plate (31), an arc base (32) and an arc groove (33), the movable bottom plate (31) is fixedly connected with the arc base (32), the arc base (32) is in rolling fit in the arc groove (33), the arc groove (33) takes an intersection point of a central line cross section of a fixed pipe clamp (10) and an axis of a cutter as a center of a circle, and takes a distance between the arc and the fixed pipe clamp as a radius of the arc, and the arc is axisymmetric about the axis of the cutter; the adjustable pipe clamp (20) is fixedly arranged on the movable bottom plate (31).

3. The clamping device of the large-diameter spiral welded pipe single-head chamfering machine according to claim 1, wherein the fine clamp pair (12) comprises an upper clamp (13), a lower clamp (14), a force application oil cylinder (15) and two first guide posts (16), the lower clamp (14) is fixedly arranged on the fixed base (1) together with the two first guide posts (16) penetrating through the lower clamp, the upper clamp (13) and the lower clamp (14) are vertically and oppositely arranged on the two first guide posts (16) in a sliding mode, and the outer sides of the first guide posts (16) are fixedly connected with the upper clamp (13) and the lower clamp (14) through the force application oil cylinder (15).

4. The clamping device of the large-diameter spiral welded pipe single-head chamfering machine according to claim 1, wherein the deviation correcting mechanism (40) comprises two calibration guide posts (41), a cross beam (42) and a sliding block (43), a calibration inclined wedge (44) is fixedly arranged on the lower surface of the sliding block (43), a wedge-shaped groove (45) is formed in the calibration inclined wedge (44), two splayed inclined planes (46) which are inclined outwards are symmetrically formed in the wedge-shaped groove (45), and the calibration inclined wedge (44) is fixed on the lower surface of the sliding block (43) through the symmetrical central line (w-w) of the splayed inclined planes 46 and the parallelism of the axes (O-O) of a cutter head is smaller than 0.02 mm; the cross beam (42) is provided with at least 3 calibration cylinders (48), the piston of each calibration cylinder (48) is hinged with a transition block (49), and each transition block (49) is fixedly connected with the corresponding sliding block (43); two guide sliding inclined planes (47) are symmetrically arranged on the upper portion of the second upper clamp (21) on the clamping axis, and the calibration oil cylinder (48) drives the calibration inclined wedge (44) to move downwards until the splayed inclined plane (46) is completely attached to the guide sliding inclined planes (47) to the bottom dead center.

5. A clamping device of a single-end chamfering machine for large-diameter spiral welded pipes as set forth in claim 1, further comprising a detecting mechanism (50), the detecting mechanism (40) detecting whether the position of the deviation correcting mechanism (40) is correct in the working state; the detection mechanism (50) comprises a laser transmitter (51), a laser receiver (52) and a notifier (53), wherein the laser transmitter (51) is arranged above the spindle motor, emits laser parallel to the axis (O-O) of the cutter disc, the laser receiver (52) is arranged right above the symmetrical center line (c-c) of the standard wedge (44), and the laser receiver (52) is correspondingly arranged above the laser transmitter (51).

6. The clamping device of the large-diameter spiral welded pipe single-head chamfering machine according to claim 5, wherein the fixed pipe clamp (10) further comprises a pre-clamp pair (11), and the fine clamp pair (12) is fixedly arranged on the rotary support (19) coaxially with the clamping axis of the pre-clamp pair (11) at intervals; when the clamping device is in a deviation correcting state, the pre-clamping pair (11) is used for ensuring that the clamping plane clamps the near end of the spiral welded pipe; when the clamping device is in a machining state, the fine clamp pair (12) is used for clamping the near end of the spiral welded pipe in a manner of ensuring the parallelism of the clamping axis and the spindle axis of the cutterhead on the premise of the same clamping plane.

7. The clamping device of the large-diameter spiral welded pipe single-head chamfering machine according to claim 6, wherein the pre-clamping pair (11) comprises a left V-clamp (11.1) and a right V-clamp (11.2), the lower parts of the left V-clamp and the right V-clamp are driven by a screw nut pair (18), and the screw nut pair (18) is fixedly arranged on a rotary support (19).

8. A method for positioning and calibrating a clamping device of a single-end chamfering machine for large-diameter spiral welded pipes as claimed in claims 1-7, comprising the steps of

S1 steel pipe pre-clamping

The large-diameter spiral welded pipe is sent into a clamping device, and a fixed pipe clamp (10) and an adjustable pipe clamp (20) respectively clamp the proximal end and the distal end of the spiral welded pipe;

s2 deviation rectifying and positioning

The deviation correcting mechanism (40) is started, the calibrating oil cylinder (48) drives the sliding block (43) and the calibrating inclined wedge (44) to move downwards, the splayed inclined surface (46) of the wedge-shaped groove (45) is finally matched with the sliding guide inclined surface (47) of the second upper clamp (21) in a sliding way until the sliding guide inclined surface is abutted against the bottom dead center, and the clamping axis of the adjustable pipe clamp (20) is calibrated to meet the parallelism requirement with the axis O-O of the cutter disc;

s3, detecting whether the position is correct

The detection mechanism (50) is started, the laser transmitter (51) emits laser, and the control mechanism repeatedly inquires whether the laser receiver (52) receives a laser signal; if yes, the notifier (53) is started to execute the step S4; if not, the notifier (53) alarms, and stops executing the positioning calibration method;

s4, processing end face and groove

9. The clamping device of the large-diameter spiral welded pipe single-head chamfering machine according to claim 8, wherein in the step S1, the fixed pipe clamp (10) clamps the spiral welded pipe as a pre-clamp pair 11;

10. The clamping device of the single-end chamfering machine for large-diameter spiral welded pipes as recited in claim 7, characterized in that two deviation correcting mechanisms (40) are respectively arranged above the fixed pipe clamp (10) and the adjustable pipe clamp (20);

step S2, firstly adjusting a far end, starting a deviation correcting mechanism (40) above an adjustable pipe clamp (20), and calibrating a clamping axis of the adjustable pipe clamp (20) to meet the parallelism requirement with a cutter disc axis O-O; and then adjusting the proximal end, starting a deviation correcting mechanism (40) above the fixed pipe clamp (10), and calibrating the clamping axis of the fixed pipe clamp (10) to meet the parallelism requirement with the cutter disc axis O-O.