CN113263095B - Multi-pass coupled wheel spinning machine for large thin-wall rectangular corrugated pipe - Google Patents

Abstract

A large-scale thin-wall rectangular corrugated pipe multi-pass opposite-wheel spinning machine comprises a thin-wall rectangular cylinder clamping device connected on the ground, wherein the thin-wall rectangular cylinder clamping device is matched with an external spinning wheel set and a driving device thereof, an internal spinning wheel set and a driving device thereof to clamp and process a thin-wall rectangular cylinder; according to the invention, by designing a plurality of groups of rotary wheels, the processing amount of each pass is reasonably distributed, so that the processing deformation force is reduced, and the processing quality of the rectangular corrugated pipe is improved.

Description

Multi-pass coupled wheel spinning machine for large thin-wall rectangular corrugated pipe

Technical Field

The invention belongs to the technical field of plastic forming of thin-wall metal cylinders, and particularly relates to a multi-pass coupled wheel spinning machine for a large thin-wall rectangular corrugated pipe.

Background

The large-sized thin-wall rectangular corrugated pipe is a pipe shell part with transverse corrugations, is commonly used for a low-pressure pipeline with design pressure not greater than 0.05MPa, can resist temperature of 1200 ℃ in the product, has a medium mostly being hot air, can absorb multidirectional displacement, and is widely applied to industries such as electric power, metallurgy, petrochemical industry and the like.

The hydroforming process is the most common forming method for corrugated pipe, and utilizes the liquid pressure in the pipe blank to make the pipe blank expand in the limiting ring until the pipe blank is yielded along the ring direction, then the pipe blank is compressed to the required length. However, in the case of a large diameter corrugated pipe, the tube blank has a large volume, and the liquid pressure in the tube blank is difficult to control, so that the forming accuracy of the corrugated pipe is low.

The mechanical bulging process is a traditional and efficient forming method for large-diameter corrugated pipes, a method that a plurality of fan-shaped male dies are pushed by a conical mandrel is adopted to carry out single-wave continuous forming, and although the roundness of the corrugations of the corrugated pipe can be improved by carrying out circumferential rotation and bulging for a plurality of times, the defects of the roundness still exist, so that the service performance of the metal corrugated pipe is influenced. Particularly, in the process of machining the rectangular corrugated pipe, the workpiece cannot rotate in the circumferential direction, and the defect is more obvious.

After a large thin-wall rectangular corrugated pipe with the thickness of more than 2000mm is processed by using a mechanical bulging process, the following defects can be caused: the wave height and the wave distance of the corrugated pipe are consistent; circular arc wrinkling at the bottom of the fillet; the fillet wave height can not meet the design requirement, so that the processed corrugated pipe can not meet the use requirement.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide a multi-pass coupled-wheel spinning machine for a large thin-wall rectangular corrugated pipe.

In order to achieve the purpose, the invention adopts the technical scheme that:

a large-scale thin-wall rectangular corrugated pipe multi-pass opposite-wheel spinning machine comprises a thin-wall rectangular cylinder clamping device 1 connected on the ground 15, the thin-wall rectangular cylinder clamping device 1, an outer spinning wheel set and a driving device 5 thereof, an inner spinning wheel set and a driving device 13 thereof are matched to clamp and process a thin-wall rectangular cylinder, and the thin-wall rectangular cylinder clamping device 1, the outer spinning wheel set and the driving device 5 thereof, the inner spinning wheel set and the driving device 13 thereof and an integrated distribution box 6 are electrically connected.

The thin-wall rectangular cylinder clamping device 1 comprises a lower support 2, a vertical moving device 4 and an upper support 3; the lower support 2 comprises a lower electric cylinder group base 30, a first lower electric cylinder group 26, a second lower electric cylinder group 27 and a third lower electric cylinder group 28 are fixed on the lower electric cylinder group base 30, wherein 4-6 first lower electric cylinder groups 26 are arranged on each side of the thin-wall rectangular cylinder body in the length direction, 2-4 third lower electric cylinder groups 28 are arranged on each side of the thin-wall rectangular cylinder body in the width direction, and 1 second lower electric cylinder group 27 is arranged at each of 4 transition round corners.

The vertical moving device 4 comprises a base 4-1, the base 4-1 is fixed on the ground 15, the base 4-1 is fixedly connected with a stator of a via hole conductive slip ring 29, the base 4-1 is connected with the lower ends of a lead screw 4-2 and a guide post 4-7, a nut 4-3 is arranged on the lead screw 4-2, the nut 4-3 is connected with a nut seat 4-4, a connecting plate 4-6 is fixed on the nut seat 4-4, a guide sleeve 4-5 is arranged on the connecting plate 4-6, and the guide sleeve 4-5 is matched with the guide post 4-7; the upper end of the guide post 4-7 is provided with a motor fixing plate 4-8, a first servo motor 4-9 is fixed on the motor fixing plate 4-8, and a main shaft of the first servo motor 4-9 is connected with the upper end of the screw rod 4-2; the connecting plates 4-6 are connected with a vertical moving device connecting frame 16, and the vertical moving device connecting frame 16 is connected with the upper support 3.

The upper support 3 comprises a radial telescopic mechanism connected with the connecting frame 16 of the vertical moving device, and the radial telescopic mechanism is connected with the upper electric cylinder group through an upper electric cylinder group connecting plate to realize the radial inward contraction and radial outward extension movement of the upper electric cylinder group; go up arranging of electric cylinder group electric cylinder and arranging unanimously with the electric cylinder of electric cylinder group down, electric cylinder group fixes a position the back to thin-walled rectangular cylinder body down, goes up electric cylinder group and can drive vertical downstream to the assigned position by vertical mobile device, and each electric cylinder is the axial to stretch out the motion afterwards, and electric cylinder group realizes compressing tightly thin-walled rectangular cylinder body under the cooperation.

The external rotation wheel set and the driving device 5 thereof comprise an external gear guide rail 31 and an external circumferential driving device, an external radial driving device and an external rotation wheel set which are arranged on the external gear guide rail;

the outer circumferential driving device comprises a plurality of outer sliding tables, each outer sliding table is provided with a second servo motor, a main shaft of each second servo motor is connected with an outer gear 42, and the outer gear 42 is meshed with the outer gear guide rail 31; the second servo motor rotates to drive the outer gear 42 to rotate, the outer gear 42 is meshed with the outer gear guide rail 31 to move circumferentially, and then the outer sliding table and the outer rotating wheel set on the outer sliding table are driven to move circumferentially;

the outer radial driving device comprises a plurality of third servo motors, each third servo motor is connected with a lead screw of the ball screw module, and the third servo motors rotate to drive the ball screw modules to do radial motion, so that the radial motion of the outward rotating wheel set is realized, and the corrugation forming of the thin-wall rectangular cylinder is realized.

The external rotation wheel set comprises 3-5 external rotation wheels, the external rotation wheels are fixed on external rotation wheel shafts 11-14, the lower ends of the external rotation wheel shafts 11-4 are mounted on a base 11-1 of the external rotation wheel set through bearings, and the external rotation wheels are axially positioned by a first sleeve 11-8; the upper end of the external rotating wheel shaft 11-4 is arranged on a first fixing plate 11-2 through a bearing, and the first fixing plate 11-2 is connected with an external rotating wheel set base 11-1; a first motor bracket 11-3 is arranged on the first fixing plate 11-2, and a fourth servo motor 11-12 arranged on the first motor bracket 11-3 is connected with an outer rotating wheel shaft 11-14.

The second servo motor, the third servo motor and the fourth servo motor are powered by the disc type conductive slip ring; the disc type conductive slip ring consists of a stator and a rotor, and the stator is fixed on the ground; the second servo motor, the third servo motor and the fourth servo motor are connected to the rotor part.

The internal rotation wheel set and the driving device 13 thereof comprise an internal gear guide rail 36 and an internal circumferential driving device, an internal radial driving device and an internal rotation wheel set which are arranged on the internal gear guide rail;

the inner circumferential driving device comprises a plurality of inner sliding tables, each inner sliding table is provided with a fifth servo motor, a main shaft of the fifth servo motor is connected with an inner gear 43, and the inner gear 43 is meshed with the inner gear guide rail 36; the fifth servo motor rotates to drive the inner gear 43 to rotate, the inner gear 43 is meshed with the inner gear guide rail 36 to move circumferentially, and then the inner sliding table and the inner rotating wheel set on the inner sliding table are driven to move circumferentially.

The inner radial driving device comprises a plurality of sixth servo motors, each sixth servo motor is connected with a lead screw on one ball screw module, and the sixth servo motors rotate to drive the ball screw modules to move radially, so that the radial movement of the inner rotating wheel group is realized, and the corrugation forming of the thin-wall rectangular cylinder is realized.

The internal rotation wheel set comprises 2-4 internal rotation wheels, the internal rotation wheels are fixed on an internal rotation wheel shaft 12-14, the lower end of the internal rotation wheel shaft 12-14 is installed on a base 12-1 of the internal rotation wheel set through a bearing, and the internal rotation wheels are axially positioned by a sleeve; the upper end of the internal rotating wheel shaft 12-14 is arranged on a second fixing plate 12-2 through a bearing, and the second fixing plate 12-2 is connected with an internal rotating wheel set base 12-1; a second motor bracket 12-3 is installed on the second fixing plate 12-2, and a seventh servo motor 12-12 installed on the second motor bracket 12-3 is connected with an inner rotary wheel shaft 12-14.

The fifth servo motor, the sixth servo motor and the seventh servo motor provide electric energy required by the processing process through a via hole conductive slip ring, the via hole conductive slip ring consists of a stator and a rotor, and the stator is fixed on a bottom plate of the vertical moving device; and a fifth servo motor, a sixth servo motor and a seventh servo motor are connected to the rotor part.

The integrated distribution box 6 provides electric energy for the first servo motors 4-9 and the electric cylinders in the lower support 2 and the upper support 3.

The process of utilizing the large thin-wall rectangular corrugated pipe multi-pass coupled wheel spinning machine comprises the following steps:

the method comprises the following steps: hoisting the thin-wall rectangular cylinder blank, and positioning by the lower electric cylinder group; after the positioning is finished, the lower electric cylinder group lifts the thin-wall rectangular cylinder to a specified height;

step two: the radial telescopic mechanism drives the upper electric cylinder group to extend outwards in the radial direction, and then the vertical moving device 4 drives the upper electric cylinder group to descend to a specified height; each electric cylinder of the upper electric cylinder group does stretching motion and is matched with the lower electric cylinder group to realize the compaction of the thin-wall rectangular cylinder blank;

step three: the first-pass internal and external rotating wheel set is positioned at a processing initial position and is driven by a ball screw module under the driving of a third servo motor and a sixth servo motor respectively to radially press a thin-wall rectangular cylinder blank; meanwhile, the inner and outer rotating wheel groups are driven by a fourth servo motor and a seventh servo motor to rotate;

step four: the rotary wheel group in the first pass is pressed in radially, so that the materials at the upper end and the lower end of the thin-wall rectangular cylinder blank flow towards the middle, and the two ends are separated from the clamping of the electric cylinder group instantly; the sensor is arranged in the electric cylinder, the electric cylinder can quickly respond according to the deformation of the thin-wall rectangular cylinder blank, and the thin-wall rectangular cylinder blank is continuously compressed under constant pressure; axial deformation generated by subsequent spinning is compensated by the displacement of the electric cylinder, and meanwhile, the electric cylinder keeps constant pressure;

step five: the first-pass internal and external rotation wheel set is driven by a second servo motor and a fifth servo motor and respectively moves circumferentially along the internal and external gear guide rails to realize circumferential continuous forming of first-pass ripples; at the moment, the second and third secondary rotating wheel sets also do circumferential motion around the inner and outer gear guide rails, but do not do radial press-in motion;

step six: the second-pass rotating wheel set moves to the initial processing position in the circumferential direction and is driven by the ball screw module to do radial pressing movement to the thin-wall rectangular cylinder under the drive of a third servo motor and a sixth servo motor respectively; then, the inner gear guide rail and the outer gear guide rail respectively do circumferential motion; the second-pass corrugation circumferential continuous forming is realized on the basis of the first-pass corrugation forming, the radial pressing-in amount of a second-pass rotating wheel set is larger than that of the first-pass rotating wheel set, and meanwhile, the shape of the second-pass rotating wheel is closer to the shape of the finally-formed corrugation;

step seven: the movement of the third secondary rotating wheel set is the same as the sixth step, and the circumferential continuous forming of the third secondary corrugation is realized on the basis of the second corrugation forming; similarly, the radial indentation amount of the third secondary corrugation reaches the maximum, and the radial indentation amount is the wave height of the finally formed corrugation; meanwhile, the shape of the third secondary rotating wheel is consistent with the shape of the formed corrugation;

step eight: after the first primary rotating wheel set moves circumferentially for a circle and reaches the initial machining position, the ball screw module drives the first primary rotating wheel set to be withdrawn radially; meanwhile, the fourth servo motor and the seventh servo motor do not drive the first primary rotary wheel set to perform rotary motion any more, and the first primary rotary wheel set still performs circumferential motion along the gear guide rail;

step nine: after the second-pass rotating wheel set moves circumferentially for a circle to reach the initial machining position, the movement is the same as the eighth step;

step ten: after the third secondary rotating wheel set moves circumferentially for one circle and reaches the initial processing position, the original moving state is still kept, and the third secondary rotating wheel set continuously moves circumferentially for 1-3 circles around the rectangular corrugated pipe; after the third secondary rotating wheel set finishes the last circumferential movement and reaches the initial processing position, the movement is the same as the step eight;

step eleven: after the first secondary rotating wheel set, the second secondary rotating wheel set and the third secondary rotating wheel set circumferentially move to positions before machining, the circumferential movement is stopped in sequence, and the thin-wall rectangular corrugated pipe finished product is machined;

step twelve: the upper electric cylinder group retracts, is lifted to a specified height by the vertical moving device and is driven to retract by the radial telescopic mechanism;

step thirteen: and lifting the finished product of the thin-wall rectangular corrugated pipe and moving the finished product away from the pair wheel spinning machine.

The invention has the beneficial effects that: according to the invention, the three pairs of internal and external rotating wheel groups are designed to respectively realize multi-pass processing of the first pass, the second pass and the third pass of the rectangular corrugated pipe, and on the basis of reasonably distributing the processing amount of the three pairs of internal and external rotating wheel groups corresponding to the three passes, the internal and external rotating wheels are respectively driven by the fourth servo motor and the seventh servo motor to rotate in the processing process, so that the material flow of a thin-wall rectangular cylinder is promoted, the processing deformation force of each pass is greatly reduced, and the processing defect of the large thin-wall rectangular corrugated pipe caused by overlarge processing deformation force is overcome; meanwhile, the sizes and the shapes of the rotary wheels of the three pairs of inner and outer rotary wheel sets are gradually close to the sizes and the shapes of the corrugations which need to be processed finally, and the corrugations which need to be processed finally can be processed without replacing the rotary wheels in the processing process. Therefore, the invention ensures higher processing efficiency on the basis of overcoming the processing defect of the large thin-wall rectangular corrugated pipe.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of a thin-wall rectangular cylinder clamping device.

Fig. 3 is a schematic view of a vertical moving device.

Fig. 4 is a schematic view of an external rotation wheel set and a driving device thereof.

FIG. 5 is a schematic view of an inner rotation wheel set and a driving device thereof.

Fig. 6 is a schematic view of a first-pass rotating wheel set.

Fig. 7 is a sectional view of the first-pass rotary wheel set.

Fig. 8 is a schematic diagram of the relative position of the disc slip ring and the ground.

Fig. 9 is a schematic cross-sectional view of fig. 8.

Fig. 10 is a schematic diagram of a via hole conductive slip ring for supplying power to each motor of an inner rotating wheel set.

Fig. 11 is a schematic view of the accurate positioning and clamping of the thin-wall rectangular cylinder.

Fig. 12 is a schematic view of a thin-walled rectangular cylinder 44.

Fig. 13 is a schematic view of a thin-walled rectangular bellows 45 formed by machining.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1, the multi-pass pair wheel spinning machine for the large thin-wall rectangular corrugated pipe comprises a thin-wall rectangular cylinder clamping device 1 connected to the ground 15, the thin-wall rectangular cylinder clamping device 1, an outer spinning wheel set and a driving device 5 thereof, an inner spinning wheel set and a driving device 13 thereof are matched to clamp and process the thin-wall rectangular cylinder, and the thin-wall rectangular cylinder clamping device 1, the outer spinning wheel set and the driving device 5 thereof, the inner spinning wheel set and the driving device 13 thereof and an integrated distribution box 6 are electrically connected.

Referring to fig. 2, the thin-wall rectangular cylinder clamping device 1 comprises a lower support 2, a vertical moving device 4 and an upper support 3; the lower support 2 comprises a lower electric cylinder group base 30, a first lower electric cylinder group 26, a second lower electric cylinder group 27 and a third lower electric cylinder group 28 are fixed on the lower electric cylinder group base 30, deformation amounts of all positions along the circumferential direction are different in the thin-wall rectangular cylinder machining process, and in order to better support the rectangular thin-wall cylinder, 20 lower electric cylinder groups 26, 20 lower electric cylinder groups 27 and 20 lower electric cylinder groups 28 are arranged on the lower electric cylinder group base 30; wherein, 5 first lower electric cylinder groups 26 are arranged on each side of the thin-wall rectangular cylinder body in the length direction, 3 third lower electric cylinder groups 28 are arranged on each side of the thin-wall rectangular cylinder body in the width direction, and 1 second lower electric cylinder group 27 is respectively arranged at 4 transition round angles; the first lower electric cylinder group 26, the second lower electric cylinder group 27 and the third lower electric cylinder group 28 position and support the thin-walled rectangular cylinder body before machining.

Referring to fig. 2, 3 and 8, the vertical moving device 4 comprises a base 4-1, the base 4-1 is fixed on the ground 15, the base 4-1 is fixedly connected with a stator of a via hole conductive slip ring 29, the base 4-1 is connected with the lower end of a screw rod 4-2 and a guide post 4-7, a nut 4-3 is arranged on the screw rod 4-2, the nut 4-3 is connected with a nut seat 4-4, a connecting plate 4-6 is fixed on the nut seat 4-4, a guide sleeve 4-5 is arranged on the connecting plate 4-6, and the guide sleeve 4-5 is matched with the guide post 4-7; the upper end of the guide post 4-7 is provided with a motor fixing plate 4-8, a first servo motor 4-9 is fixed on the motor fixing plate 4-8, and a main shaft of the first servo motor 4-9 is connected with the upper end of the screw rod 4-2; the first servo motor 4-9 rotates to drive the screw rod 4-2 to rotate, and then the nut seat 4-4 drives the connecting plate 4-6 to vertically move; the guide post 4-7 and the guide sleeve 4-5 are matched to ensure the accurate guide of the connecting plate 4-6, the connecting plate 4-6 is connected with a vertical moving device connecting frame 16, and the vertical moving device connecting frame 16 is connected with the upper support 3, so that the integral vertical movement of the upper support 3 is realized.

Referring to fig. 2, the upper support 3 includes a first radial telescopic mechanism 17, a second radial telescopic mechanism 18, and a third radial telescopic mechanism 19 fixed on the vertical moving device connecting frame 16, and the first radial telescopic mechanism 17, the second radial telescopic mechanism 18, and the third radial telescopic mechanism 19 are connected to the first upper electric cylinder group 23, the second upper electric cylinder group 24, and the third upper electric cylinder group 25 through a first upper electric cylinder group connecting plate 20, a second upper electric cylinder group connecting plate 21, and a third upper electric cylinder group connecting plate 22; the first radial telescopic mechanism 17, the second radial telescopic mechanism 18 and the third radial telescopic mechanism 19 are retracted and extended to realize the radial inward-retraction and radial outward-extension movement of the first upper electric cylinder group 23, the second upper electric cylinder group 24 and the third upper electric cylinder group 25; the arrangement of the first upper electric cylinder group 23, the second upper electric cylinder group 24 and the third upper electric cylinder group 25 is consistent with the arrangement of the first lower electric cylinder group 26, the second lower electric cylinder group 27 and the third lower electric cylinder group 28; after the first lower electric cylinder group 26, the second lower electric cylinder group 27 and the third lower electric cylinder group 28 position the thin-walled rectangular cylinder, the first upper electric cylinder group 23, the second upper electric cylinder group 24 and the third upper electric cylinder group 25 are driven by the vertical moving device 4 to vertically move downwards to a specified position, and then the first upper electric cylinder group 23, the second upper electric cylinder group 24 and the third upper electric cylinder group 25 do axial extension movement to match the first lower electric cylinder group 26, the second lower electric cylinder group 27 and the third lower electric cylinder group 28 to realize the compaction of the thin-walled rectangular cylinder.

Referring to fig. 4, the external rotation wheel set and the driving device 5 thereof include an external gear guide rail 31, and an external circumferential driving device, an external radial driving device and an external rotation wheel set mounted thereon;

referring to fig. 1 and 4, the outer circumferential driving device includes a first outer sliding table 33a, a second outer sliding table 33b, and a third outer sliding table 33c, wherein a first servo motor 32a, a second servo motor 32b, and a third servo motor 32c are respectively mounted on the first outer sliding table 33a, the second outer sliding table 33b, and the third outer sliding table 33c, main shafts of the first servo motor 32a, the second servo motor 32b, and the second servo motor 32c are connected with an outer gear 42, and the outer gear 42 is engaged with the outer gear guide rail 31; the first second servo motor 32a, the second servo motor 32b and the third second servo motor 32c rotate to drive the external gear 42 to rotate, the external gear 42 is meshed with the external gear guide rail 31 to move circumferentially, and then the first external sliding table 33a, the second external sliding table 33b, the third external sliding table 33c and the first external rotating wheel set 11, the second external rotating wheel set 9 and the third external rotating wheel set 7 on the first external sliding table, the second external rotating wheel set 9 and the third external rotating wheel set 7 are driven to move circumferentially.

Referring to fig. 4, the outer radial driving device includes a first third servo motor 35a, a second third servo motor 35b, a third servo motor 35c, and a screw connection on the first ball screw module 34a, the second ball screw module 34b, and the third ball screw module 34 c; the first servo motor 35a, the second servo motor 35b and the third servo motor 35c rotate to respectively drive the first ball screw module 34a, the second ball screw module 34b and the third ball screw module 34c to move radially, so that the first outward rotating wheel group 11, the second outward rotating wheel group 9 and the third outward rotating wheel group 7 move radially, and the corrugation forming of the thin-wall rectangular cylinder is realized.

Referring to fig. 6 and 7, each of the first outward rotating wheel set 11, the second outward rotating wheel set 9 and the third outward rotating wheel set 7 comprises two outward rotating wheels one 11-7 and two outward rotating wheels two 11-9, the two outward rotating wheels one 11-7 and the two outward rotating wheels two 11-9 are fixed on an outward rotating wheel shaft 11-14, and the outward rotating wheels one 11-7 and the outward rotating wheels two 11-9 are axially positioned by a first sleeve 11-8; the lower end of an external rotating wheel shaft 11-14 is arranged on an external rotating wheel set base 11-1 through a first cylindrical roller bearing 11-6 and a first thrust bearing 11-5, the upper end of the external rotating wheel shaft is arranged on a first fixing plate 11-2 through a bearing and is axially positioned through a second sleeve 11-13, and the first fixing plate 11-2 is connected with the external rotating wheel set base 11-1 through a first bolt 11-11 and a first nut 11-10; a first motor bracket 11-3 is arranged on the first fixing plate 11-2, and a fourth servo motor 11-12 arranged on the first motor bracket 11-3 is connected with an outer rotating wheel shaft 11-14; when the four-wheel-type external rotation device works, the fourth servo motor 11-12 drives the external rotation wheel shaft 11-14 to rotate, and the external rotation wheel shaft 11-14 further drives the first external rotation wheel 11-7 and the second external rotation wheel 11-9 to rotate.

Referring to fig. 4, 8 and 9, the first second servo motor 32a, the second servo motor 32b, the third servo motor 32c, the third first servo motor 35a, the third second servo motor 35b, the third servo motor 35c and the fourth servo motor 11-12 are powered by the disc-type conductive slip ring 14, the disc-type conductive slip ring 14 is composed of a stator and a rotor, the stator is fixed on the ground 15, the first second servo motor 32a, the second servo motor 32b, the second servo motor third 32c, the first third servo motor 35a, the second servo motor 35b, the third servo motor third 35c and the fourth servo motor 11-12 are connected to the rotor portion, and it is ensured that no winding occurs in the line when the external rotation wheel set and the driving device thereof move circumferentially along the external gear guide rail.

Referring to fig. 5, the internal rotation wheel set and the driving device 13 thereof include an internal gear guide rail 36, and an internal circumferential driving device, an internal radial driving device and an internal rotation wheel set mounted thereon;

referring to fig. 5, the inner circumferential driving device includes a first inner sliding table 38a, a second inner sliding table 38b, and a third inner sliding table 38c, a fifth servo motor 37a, a fifth servo motor 37b, and a fifth servo motor 37c are mounted on the first inner sliding table 38a, the second inner sliding table 38b, and the third inner sliding table 38c, a main shaft of the fifth servo motor 37a, the fifth servo motor 37b, and the fifth servo motor 37c are connected with an internal gear 43, and the internal gear 43 is engaged with the internal gear guide rail 36; the first fifth servo motor 37a, the second fifth servo motor 37b and the third fifth servo motor 37c rotate to drive the internal gear 43 to rotate, the internal gear 43 is meshed with the internal gear guide rail 36 to move circumferentially, and then the first internal rotating wheel set 12, the second internal rotating wheel set 10 and the third internal rotating wheel set 8 on the first internal sliding table 38a, the second internal sliding table 38b and the third internal sliding table 38c are driven to move circumferentially.

Referring to fig. 5, the inner radial driving device includes a first sixth servo motor 40a, a second sixth servo motor 40b, and a third sixth servo motor 40c, the first sixth servo motor 40a, the second sixth servo motor 40b, the third sixth servo motor 40c, a fourth ball screw module 39a, a fifth ball screw module 39b, and a lead screw on the sixth ball screw module 39c are connected, and the first sixth servo motor 40a, the second sixth servo motor 40b, and the third sixth servo motor 40c rotate to drive the fourth ball screw module 39a, the fifth ball screw module 39b, and the sixth ball screw module 39c to move radially, so as to realize radial movement of the first inner rotary wheel set 12, the second inner rotary wheel set 10, and the third inner rotary wheel set 8, that is, to realize thin-wall rectangular cylinder corrugation forming.

Referring to fig. 6 and 7, each of the first internal rotation wheel set 12, the second internal rotation wheel set 10 and the third internal rotation wheel set 8 includes 3 internal rotation wheels, namely, one internal rotation wheel one 12-7 and two internal rotation wheels two 12-9, wherein the internal rotation wheel one 12-7 and the internal rotation wheel two 12-9 are fixed on an internal rotation wheel shaft 12-14 and are axially positioned by a third sleeve 12-8; the lower end of the internal rotating wheel shaft 12-14 is provided with a second cylindrical roller bearing 12-6, a second thrust bearing 12-5 is arranged on the base 12-1 of the internal rotating wheel group, the upper end is arranged on a second fixed plate 12-2 through a bearing, and the axial positioning is carried out through a fourth sleeve 12-13; the second fixing plate 12-2 is connected with the inner rotating wheel set base 12-1 through a second bolt 12-11 and a second nut 12-10; a second motor bracket 12-3 is arranged on the second fixing plate 12-2, and a seventh servo motor 12-12 arranged on the second motor bracket 12-3 is connected with an inner rotating wheel shaft 12-14; when the rotary type electric spinning machine works, the seventh servo motor 12-12 drives the inner rotary wheel shaft 12-14 to rotate, and the inner rotary wheel shaft 12-14 further drives the first inner rotary wheel 12-7 and the second inner rotary wheel 12-9 to rotate.

Referring to fig. 10, the first fifth servo motor 37a, the second fifth servo motor 37b, the third fifth servo motor 37c, the first sixth servo motor 40a, the second sixth servo motor 40b, the third sixth servo motor 40c and the seventh servo motor 12-12 provide electric energy required by the machining process through the via conductive slip ring 29; the via hole conductive slip ring 29 consists of a stator and a rotor, and the stator is fixed on the bottom plate 4-1 of the vertical moving device; the first fifth servo motor 37a, the second fifth servo motor 37b, the third fifth servo motor 37c, the first sixth servo motor 40a, the second sixth servo motor 40b, the third sixth servo motor 40c and the seventh servo motor 12-12 are connected to the rotor part, so that the winding of the lines can be avoided when the inner rotating wheel set and the driving device thereof do circumferential motion along the inner gear guide rail.

Referring to fig. 4 and 5, in the present embodiment, the first external rotation wheel set 7, the second external rotation wheel set 9, and the third external rotation wheel set 11 have 4 external rotation wheels, while the first internal rotation wheel set 8, the second internal rotation wheel set 10, and the third internal rotation wheel set 12 have 3 internal rotation wheels, and the number of the rotation wheels mainly depends on the finally formed corrugated shape and number; meanwhile, two external rotating wheels two 11-9 at the outer ends of the first external rotating wheel group 7, the second external rotating wheel group 9 and the third external rotating wheel group 11 also play a certain supporting role in the radial direction of the thin-wall rectangular cylinder during molding, so that the molding precision can be improved; when the shape and the quantity of the processed corrugations are changed, the rotating wheel set can be adjusted to adapt to different processing requirements.

Referring to fig. 1 and 2, the integrated distribution box 6 provides electric energy for the first servo motors 4-9 and the electric cylinders in the lower support 2 and the upper support 3.

The process of utilizing the large thin-wall rectangular corrugated pipe multi-pass coupled wheel spinning machine comprises the following steps:

the method comprises the following steps: referring to fig. 2, the thin-wall rectangular cylinder blank is hoisted, and is positioned by the first lower electric cylinder group 26, the second lower electric cylinder group 27 and the third lower electric cylinder group 28, and after the positioning is completed, the first lower electric cylinder group 26, the second lower electric cylinder group 27 and the third lower electric cylinder group 28 lift the thin-wall rectangular cylinder blank 44 to a specified height;

step two: referring to fig. 2 and 11, the first radial telescopic mechanism 17, the second radial telescopic mechanism 18 and the third radial telescopic mechanism 19 drive the first upper electric cylinder group 23, the second upper electric cylinder group 24 and the third upper electric cylinder group 25 to extend radially outwards, and then the vertical moving device 4 drives the first upper electric cylinder group 23, the second upper electric cylinder group 24 and the third upper electric cylinder group 25 to descend to a specified height; the first upper electric cylinder group 23, the second upper electric cylinder group 24 and the third upper electric cylinder group 25 do stretching movement and are matched with the first lower electric cylinder group 26, the second lower electric cylinder group 27 and the third lower electric cylinder group 28 to realize the compaction of the thin-wall rectangular cylinder blank 44;

step three: referring to fig. 4, 5, 11 and 12, the first outward rotating wheel set 11 and the first inward rotating wheel set 12 in the first pass are at initial processing positions, and are driven by the first ball screw module 34a and the fourth ball screw module 39a to be radially pressed into the thin-wall rectangular cylinder blank 44 under the driving of the first servo motor 35a and the first sixth servo motor 40a, respectively; meanwhile, the first external rotation wheel set 11 and the first internal rotation wheel set 12 are driven by a fourth servo motor 11-12 and a seventh servo motor 12-12 to rotate, and the rotation of the rotation wheels can promote the material flow and reduce the deformation force in the rectangular corrugated pipe forming process;

step four: due to the radial pressing of the rotary wheel group in the first pass, the materials at the upper end and the lower end of the thin-wall rectangular cylinder blank 44 flow towards the middle, and the two ends are separated from the clamping of the electric cylinder group instantly; the sensor is arranged in the electric cylinder, the sensor quickly responds according to the deformation of the thin-wall rectangular cylinder blank 44, and the thin-wall rectangular cylinder blank 44 is continuously pressed under constant pressure; axial deformation generated by subsequent spinning is compensated by the displacement of the electric cylinder, and meanwhile, the electric cylinder keeps constant pressure;

step five, referring to fig. 4, 5 and 11, the first external rotation wheel set 11 and the first internal rotation wheel set 12 in the first pass are driven by a first second servo motor 32a and a first fifth servo motor 37a to respectively move circumferentially along the external gear guide rail 31 and the internal gear guide rail 36, so as to realize circumferential continuous forming of the first pass of ripple; at this time, the second and third external rotation wheel sets 7, the third internal rotation wheel set 8, the second external rotation wheel set 9 and the second internal rotation wheel set 10 also perform circumferential motion around the external gear guide rail 31 and the internal gear guide rail 36, but do not perform radial press-in motion;

step six: referring to fig. 4, 5 and 11, the second external rotation wheel set 9 and the second internal rotation wheel set 10 of the second pass move circumferentially to the initial processing position, and are driven by the second ball screw module 34b and the fifth ball screw module 39b to perform radial pressing movement on the thin-wall rectangular cylinder blank 44 under the driving of the second servo motor 35b and the second servo motor 40b, respectively; then, the outer gear guide rail 31 and the inner gear guide rail 36 are respectively moved circumferentially; realizing circumferential continuous forming of second-pass corrugations on the basis of forming of the first-pass corrugations; the radial pressing amount of the second-pass rotating wheel set is larger than that of the first-pass rotating wheel set, and the shape of the second-pass rotating wheel is closer to the shape of finally-formed corrugations;

step seven: the movement of the third secondary rotating wheel set is the same as the sixth step, and the circumferential continuous forming of the third secondary corrugation is realized on the basis of the second corrugation forming; similarly, the radial indentation amount of the third secondary corrugation reaches the maximum, and the radial indentation amount is the wave height of the finally formed corrugation; meanwhile, the shape of the third secondary rotating wheel is consistent with the shape of the formed corrugation;

step eight: after the first primary rotating wheel set moves circumferentially for a circle and reaches the initial machining position, the ball screw module drives the first primary rotating wheel set to be withdrawn radially; meanwhile, the fourth servo motor 11-12 and the seventh servo motor 12-12 do not drive the first-pass rotary wheel set to perform rotary motion any more, but the first-pass rotary wheel set still performs circumferential motion along the gear guide rail for the purpose that the subsequent two-pass machining can be continued;

step nine: after the second-pass rotating wheel set moves circumferentially for a circle to reach the initial machining position, the movement is the same as the eighth step;

step ten: after the third secondary rotating wheel set moves circumferentially for one circle and reaches the initial machining position, the original moving state is still kept, and the third secondary rotating wheel set continuously moves circumferentially for 1-3 circles around the rectangular corrugated pipe, so that the corrugated machining quality is guaranteed; after the third secondary rotating wheel set finishes the last circumferential movement and reaches the initial processing position, the movement is the same as the step eight;

step eleven: the first secondary rotating wheel set, the second secondary rotating wheel set and the third secondary rotating wheel set stop moving circumferentially in sequence after moving to the positions before machining; at this point, the thin-walled rectangular corrugated pipe finished product 45 is finished, as shown in fig. 13;

step twelve: retracting the upper electric cylinder group, and releasing the clamping of the thin-wall rectangular corrugated pipe finished product 45; meanwhile, the upper electric cylinder group is lifted to a specified height by the vertical moving device and is driven by the radial telescopic mechanism to contract inwards, so that a space is provided for lifting the finished thin-wall rectangular corrugated pipe 45;

step thirteen: lifting the finished product 45 of the thin-wall rectangular corrugated pipe, and moving the finished product away from the pair-wheel spinning machine;

fourteen steps: detecting the forming quality of the thin-wall rectangular corrugated pipe finished product 45;

step fifteen: the next thin-walled rectangular bellows blank 44 is machined according to steps one through fourteen.

Claims (8)

1. A multi-pass pair wheel spinning machine for large thin-wall rectangular corrugated pipes is characterized in that: the thin-wall rectangular cylinder clamping device comprises a thin-wall rectangular cylinder clamping device (1) connected to the ground (15), wherein the thin-wall rectangular cylinder clamping device (1) is matched with an external rotating wheel set and a driving device (5) thereof, an internal rotating wheel set and a driving device (13) thereof to clamp and process the thin-wall rectangular cylinder, and the thin-wall rectangular cylinder clamping device (1), the external rotating wheel set and the driving device (5) thereof, the internal rotating wheel set and the driving device (13) thereof are electrically connected with an integrated distribution box (6);

the thin-wall rectangular cylinder clamping device (1) comprises a lower support (2), a vertical moving device (4) and an upper support (3); the lower support (2) comprises a lower electric cylinder group base (30), a first lower electric cylinder group (26), a second lower electric cylinder group (27) and a third lower electric cylinder group (28) are fixed on the lower electric cylinder group base (30), wherein 4-6 first lower electric cylinder groups (26) are arranged on each side of the thin-wall rectangular cylinder body in the length direction, 2-4 third lower electric cylinder groups (28) are arranged on each side of the thin-wall rectangular cylinder body in the width direction, and 1 second lower electric cylinder group (27) is respectively arranged at 4 transitional circular angles;

the external rotation wheel set and the driving device (5) thereof comprise an external gear guide rail (31) and an external circumferential driving device, an external radial driving device and an external rotation wheel set which are arranged on the external gear guide rail;

the outer circumferential driving device comprises a plurality of outer sliding tables, each outer sliding table is provided with a second servo motor, a main shaft of each second servo motor is connected with an outer gear (42), and the outer gear (42) is meshed with an outer gear guide rail (31); the second servo motor rotates to drive the outer gear (42) to rotate, the outer gear (42) is meshed with the outer gear guide rail (31) to move circumferentially, and then the outer sliding table and the outer rotating wheel set on the outer sliding table are driven to move circumferentially;

the outer radial driving device comprises a plurality of third servo motors, each third servo motor is connected with a lead screw of the ball screw module, and the third servo motors rotate to drive the ball screw modules to do radial motion, so that the radial motion of the outward rotating wheel group is realized, namely the corrugation forming of the thin-wall rectangular cylinder is realized;

the internal rotation wheel set and the driving device (13) thereof comprise an internal gear guide rail (36) and an internal circumferential driving device, an internal radial driving device and an internal rotation wheel set which are arranged on the internal gear guide rail;

the inner circumferential driving device comprises a plurality of inner sliding tables, each inner sliding table is provided with a fifth servo motor, a main shaft of each fifth servo motor is connected with an inner gear (43), and the inner gear (43) is meshed with an inner gear guide rail (36); the fifth servo motor rotates to drive the inner gear (43) to rotate, the inner gear (43) is meshed with the inner gear guide rail (36) to move circumferentially, and then the inner sliding table and the inner rotating wheel set on the inner sliding table are driven to move circumferentially;

the inner radial driving device comprises a plurality of sixth servo motors, each sixth servo motor is connected with a lead screw on one ball screw module, and the sixth servo motors rotate to drive the ball screw modules to move radially, so that the radial movement of the inner rotating wheel group is realized, and the corrugation forming of the thin-wall rectangular cylinder is realized.

2. The large-scale thin-wall rectangular corrugated pipe multi-pass pair wheel spinning machine according to claim 1, characterized in that: the vertical moving device (4) comprises a base (4-1), the base (4-1) is fixed on the ground (15), the base (4-1) is fixedly connected with a stator of a via hole conductive slip ring (29), the base (4-1) is connected with a lead screw (4-2) and the lower end of a guide pillar (4-7), a nut (4-3) is arranged on the lead screw (4-2), the nut (4-3) is connected onto a nut seat (4-4), a connecting plate (4-6) is fixed onto the nut seat (4-4), a guide sleeve (4-5) is arranged on the connecting plate (4-6), and the guide sleeve (4-5) is matched with the guide pillar (4-7); a motor fixing plate (4-8) is arranged at the upper end of the guide post (4-7), a first servo motor (4-9) is fixed on the motor fixing plate (4-8), and a main shaft of the first servo motor (4-9) is connected with the upper end of the screw rod (4-2); the connecting plates (4-6) are connected with a vertical moving device connecting frame (16), and the vertical moving device connecting frame (16) is connected with the upper support (3).

3. The large-scale thin-wall rectangular corrugated pipe multi-pass pair wheel spinning machine according to claim 2, characterized in that: the upper support (3) comprises a radial telescopic mechanism connected with the connecting frame (16) of the vertical moving device, and the radial telescopic mechanism is connected with the upper electric cylinder group through an upper electric cylinder group connecting plate to realize the radial inward contraction and radial outward extension movement of the upper electric cylinder group; go up arranging of electric cylinder group electric cylinder and arranging unanimously with the electric cylinder of electric cylinder group down, electric cylinder group fixes a position the back to thin-walled rectangular cylinder body down, goes up electric cylinder group and can drive vertical downstream to the assigned position by vertical mobile device, and each electric cylinder is the axial to stretch out the motion afterwards, and electric cylinder group realizes compressing tightly thin-walled rectangular cylinder body under the cooperation.

4. The large-scale thin-wall rectangular corrugated pipe multi-pass pair wheel spinning machine according to claim 1, characterized in that: the external rotation wheel set comprises 3-5 external rotation wheels, the external rotation wheels are fixed on external rotation wheel shafts (11-14), the lower ends of the external rotation wheel shafts (11-14) are installed on a base (11-1) of the external rotation wheel set through bearings, and the external rotation wheels are axially positioned through first sleeves (11-8); the upper end of the external rotating wheel shaft (11-14) is arranged on a first fixing plate (11-2) through a bearing, and the first fixing plate (11-2) is connected with the external rotating wheel set base (11-1); a first motor bracket (11-3) is arranged on the first fixing plate (11-2), and a fourth servo motor (11-12) arranged on the first motor bracket (11-3) is connected with an external rotating wheel shaft (11-14).

5. The large-scale thin-wall rectangular corrugated pipe multi-pass pair wheel spinning machine according to claim 4, characterized in that: the inner rotating wheel set comprises 2-4 inner rotating wheels, the inner rotating wheels are fixed on an inner rotating wheel shaft (12-14), the lower ends of the inner rotating wheel shaft (12-14) are installed on a base (12-1) of the inner rotating wheel set through bearings, and the inner rotating wheels are axially positioned through sleeves; the upper end of the internal rotating wheel shaft (12-14) is arranged on a second fixing plate (12-2) through a bearing, and the second fixing plate (12-2) is connected with the internal rotating wheel set base (12-1); a second motor bracket (12-3) is arranged on the second fixing plate (12-2), and a seventh servo motor (12-12) arranged on the second motor bracket (12-3) is connected with an inner rotating wheel shaft (12-14).

6. The large-scale thin-wall rectangular corrugated pipe multi-pass pair wheel spinning machine according to claim 5, characterized in that: the second servo motor, the third servo motor and the fourth servo motor provide electric energy required by the machining process through a disc type conductive slip ring, the disc type conductive slip ring consists of a stator and a rotor, the stator is fixed on the ground, and the second servo motor, the third servo motor and the fourth servo motor are connected to a rotor part; the fifth servo motor, the sixth servo motor and the seventh servo motor provide electric energy required by the machining process through a via hole conductive slip ring, the via hole conductive slip ring is composed of a stator and a rotor, the stator is fixed on a base of the vertical moving device, and the fifth servo motor, the sixth servo motor and the seventh servo motor are connected to a rotor part.

7. The large-scale thin-wall rectangular corrugated pipe multi-pass pair wheel spinning machine according to claim 2, characterized in that: the integrated distribution box (6) provides electric energy for the first servo motors (4-9) and electric cylinders in the lower support (2) and the upper support (3).

8. The process for utilizing the large-scale thin-wall rectangular corrugated pipe multi-pass pair wheel spinning machine as claimed in claim 3, is characterized by comprising the following steps:

the method comprises the following steps: hoisting the thin-wall rectangular cylinder blank, and positioning by the lower electric cylinder group; after the positioning is finished, the lower electric cylinder group lifts the thin-wall rectangular cylinder to a specified height;

step two: the radial telescopic mechanism drives the upper electric cylinder group to extend outwards in the radial direction, and then the vertical moving device (4) drives the upper electric cylinder group to descend to a specified height; each electric cylinder of the upper electric cylinder group does stretching motion and is matched with the lower electric cylinder group to realize the compaction of the thin-wall rectangular cylinder blank;

step three: the first primary rotating wheel set is positioned at the initial processing position and is driven by a ball screw module under the driving of a third servo motor and a sixth servo motor respectively to radially press a thin-wall rectangular cylinder blank; meanwhile, the inner and outer rotating wheel groups are driven by a fourth servo motor and a seventh servo motor to rotate;

step four: the material at the upper end and the material at the lower end of the thin-wall rectangular cylinder blank flow towards the middle due to the radial pressing of the first-pass rotating wheel set, and the two ends are separated from the clamping of the electric cylinder set instantly; the sensor is arranged in the electric cylinder, the electric cylinder can quickly respond according to the deformation of the thin-wall rectangular cylinder blank, and the thin-wall rectangular cylinder blank is continuously compressed under constant pressure; axial deformation generated by subsequent spinning is compensated by the displacement of the electric cylinder, and meanwhile, the electric cylinder keeps constant pressure;

step five: the first-pass secondary rotating wheel set is driven by a second servo motor and a fifth servo motor and respectively moves circumferentially along the inner gear guide rail and the outer gear guide rail, so that circumferential continuous forming of first-pass corrugations is realized; at the moment, the second and third secondary rotating wheel sets also do circumferential motion around the inner and outer gear guide rails, but do not do radial press-in motion;

step six: the second-pass rotating wheel set moves to the initial processing position in the circumferential direction and is driven by the ball screw module to do radial pressing movement to the thin-wall rectangular cylinder under the drive of a third servo motor and a sixth servo motor respectively; then, the inner gear guide rail and the outer gear guide rail respectively do circumferential motion; the second-pass corrugation circumferential continuous forming is realized on the basis of the first-pass corrugation forming, the radial pressing-in amount of a second-pass rotating wheel set is larger than that of the first-pass rotating wheel set, and meanwhile, the shape of the second-pass rotating wheel is closer to the shape of the finally-formed corrugation;

step seven: the movement of the third secondary rotating wheel set is the same as the sixth step, and the circumferential continuous forming of the third secondary corrugation is realized on the basis of the second corrugation forming; similarly, the radial indentation amount of the third secondary corrugation reaches the maximum, and the radial indentation amount is the wave height of the finally formed corrugation; meanwhile, the shape of the third secondary rotating wheel is consistent with the shape of the formed corrugation;

step eight: after the first primary rotating wheel set moves circumferentially for a circle and reaches the initial machining position, the ball screw module drives the first primary rotating wheel set to be withdrawn radially; meanwhile, the fourth servo motor and the seventh servo motor do not drive the first primary rotary wheel set to perform rotary motion any more, and the first primary rotary wheel set still performs circumferential motion along the gear guide rail;

step nine: after the second-pass rotating wheel set moves circumferentially for a circle to reach the initial machining position, the movement is the same as the eighth step;

step ten: after the third secondary rotating wheel set moves circumferentially for one circle and reaches the initial processing position, the original moving state is still kept, and the third secondary rotating wheel set continuously moves circumferentially for 1-3 circles around the rectangular corrugated pipe; after the third secondary rotating wheel set finishes the last circumferential movement and reaches the initial processing position, the movement is the same as the step eight;

step eleven: after the first secondary rotating wheel set, the second secondary rotating wheel set and the third secondary rotating wheel set circumferentially move to positions before machining, the circumferential movement is stopped in sequence, and the thin-wall rectangular corrugated pipe finished product is machined;

step twelve: the upper electric cylinder group retracts, is lifted to a specified height by the vertical moving device and is driven to retract by the radial telescopic mechanism;

step thirteen: and lifting the finished product of the thin-wall rectangular corrugated pipe and moving the finished product away from the pair wheel spinning machine.

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