CN116141556A - Automatic forming device and forming method for threaded pipe - Google Patents

Abstract

The invention relates to an automatic forming device and a forming method of a threaded pipe, wherein the threaded pipe is made of degradable plastic, and the forming device comprises: a support base; a tube support mechanism for supporting the tube at least in a radial direction of the tube; a wire releasing mechanism provided with a wire storage part for placing a wire and a lead part for leading the wire out from the wire storage part to the pipe; the guiding mechanism is used for guiding the paying-off mechanism to move along the axial direction of the pipe; the shaping mechanism is used for axially compressing the pipe along the pipe; the driving mechanism is used for driving the pipe supporting mechanism to drive the pipe to rotate around the pipe shaft and simultaneously driving the paying-off mechanism to move along the axial direction of the pipe and covering the axial length range of the pipe so as to be suitable for winding the wire on the surface of the pipe; the replacement mechanism comprises a support replacement part for replacing the pipe support mechanism or a screw replacement part for replacing the screw. The invention can ensure the accuracy of the forming of the threaded pipe.

Description

Automatic forming device and forming method for threaded pipe

Technical Field

The invention relates to the field of plastic molding, in particular to an automatic molding device and an automatic molding method for a threaded pipe.

Background

In the prior art, two schemes are generally adopted for thread forming of pipes: one is extrusion molding through a die, the other is grinding and cutting processing through a cutter, but in the medical field, particularly in the medical implant field, because the material of the pipe is degradable plastic, the material specificity of the pipe cannot be shaped through the die and cannot be processed through the cutter, and therefore, both molding schemes are not suitable for the thread molding of the flexible pipeline pipe in the medical field.

In the medical field, the preparation of threaded pipes is often carried out by the following method: by adopting the pouring principle, a tubular mold is prepared, a silica gel raw material is injected into the mold, and after the raw material is solidified and molded, hole forming is carried out and the inner wall is etched. However, the screw thread of the casting molding can not be accurately controlled, and air holes exist in the screw thread pipe possibly because of incomplete air discharge, so that the quality of the screw thread pipe is affected. Another method for forming the threaded pipe is to wind the wire on the pipe to form threads, and the preparation method cannot control the winding force and cannot ensure that the wire is not damaged during winding.

Both preparation modes cannot realize accurate control of the thread spacing, so that the accuracy of thread forming of a threaded pipe cannot be ensured; moreover, the strength cannot be controlled, and the original pipe is possibly damaged due to winding, so that the performance of the threaded pipe cannot meet the use requirement, and even the threaded pipe is damaged. Therefore, both preparation methods are not suitable for mass production of threaded pipes.

Disclosure of Invention

The present invention aims to solve at least one of the problems in the prior art. Therefore, the invention provides an automatic forming device and a forming method for threaded pipes, which are convenient for mass production of threaded pipes of different types.

According to an embodiment of the present invention, an automatic forming device for a threaded pipe, the threaded pipe being made of degradable plastic, the forming device comprising: a support base; a tube support mechanism for supporting the tube at least in a radial direction of the tube; a wire releasing mechanism provided with a wire storage part for placing a wire and a lead part for leading the wire out from the wire storage part to the pipe; the shaping mechanism is used for axially compressing the pipe along the pipe; the driving mechanism is used for driving the pipe supporting mechanism to drive the pipe to rotate around the pipe shaft, and simultaneously driving the paying-off mechanism to move along the axial direction of the pipe and covering the axial length range of the pipe through the lead screw so as to be suitable for winding the wire on the surface of the pipe; the replacement mechanism comprises a support replacement part for replacing the pipe support mechanism or a screw replacement part for replacing the screw.

In some embodiments, the support changing portion includes a pair of support changeover disks opposite to each other and rotatably disposed on the support base about a first axis parallel to the pipe axial direction, and a plurality of support mounting holes are provided on the support changeover disks for correspondingly threading a plurality of the pipe support mechanisms, the plurality of support mounting holes being circumferentially equally spaced about the first axis to be adapted to rotate about the first axis by the support changeover disk such that any one of the pipe support mechanisms corresponding to the support mounting holes is associable with the drive mechanism while the remaining pipe support mechanisms corresponding to the support mounting holes are unassociated with the drive mechanism.

Further, the support changing portion further includes a first set of pins for effecting the association adapted for the drive mechanism to drive the pipe support mechanism in rotation about the pipe axis.

Further, the first pin group includes a first main pin connecting the driving mechanism and the pipe supporting mechanism, a first driving pin fixing the first main pin and the driving mechanism, and a first pipe pin fixing the first main pin and the pipe supporting mechanism.

In some embodiments, the support changing portion further includes a first fixing member for fixing the support changeover plate to rest on the support base when the drive mechanism drives the pipe support mechanism.

In some embodiments, the screw replacing part comprises a pair of screw conversion plates which are opposite to each other and are rotatably arranged on the supporting seat around a second axis parallel to the axial direction of the pipe, a plurality of screw mounting holes are arranged on the screw conversion plates and are correspondingly penetrated and used for supporting a plurality of screws, the plurality of screw mounting holes are circumferentially and equidistantly distributed around the second axis and are suitable for being rotated around the second axis through the screw conversion plates, so that screws corresponding to any screw mounting hole can be associated with the driving mechanism, and screws corresponding to other support mounting holes are not associated with the driving mechanism.

Further, the screw replacing part further comprises a second pin group for realizing the association, so that the driving mechanism is suitable for driving the screw to rotate and driving the paying-off mechanism to axially move along the pipe.

Further, the second pin group comprises a second main pin for connecting the driving mechanism and the screw rod, a second driving pin for fixing the second main pin and the driving mechanism, and a second pipe pin for fixing the second main pin and the screw rod.

In some embodiments, the screw replacing part further includes a second fixing member for fixing the bearing conversion plate to rest on the support base when the driving mechanism drives the screw to rotate.

In some embodiments, the drive mechanism includes a drive input device, a first drive wheel, and a second drive wheel, the drive input device driving the first drive wheel and the second drive wheel to rotate; the first driving wheel is connected with the pipe supporting mechanism so as to be suitable for driving the pipe supporting mechanism to rotate around the pipe shaft, and the second driving wheel is connected with the screw so as to be suitable for driving the screw to rotate.

According to the automatic threaded pipe forming device, the wire rod arranged in the wire storage part of the wire releasing mechanism is led out through the wire leading part and then wound on the pipe arranged on the pipe supporting mechanism by synchronously moving the wire releasing mechanism and the pipe supporting mechanism, and the wire rod is wound on the pipe by matching the pipe supporting mechanism and the wire releasing mechanism while the pipe supporting mechanism axially rotates around the pipe, so that a winding procedure of the pipe is realized.

In particular, when the driving mechanism drives the pipe supporting structure to rotate around the pipe in the axial direction, the movement is synchronously transmitted to the paying-off mechanism, namely, the rotational movement of the pipe supporting structure around the pipe axis and the moving movement of the paying-off mechanism along the pipe axis are in association, and the ratio between the angular speed of the rotational movement around the pipe axis and the linear speed of the moving movement along the pipe axis is fixed. According to setting up different ratios, can control the speed ratio between the rotation of tubular product bearing structure around tubular product axis and the unwrapping wire mechanism along tubular product axis removal, through control speed ratio, just can accurate control screw thread clearance width. That is, it is desirable to select different values of thread gap when producing a threaded pipe, and only the ratio of the speed of rotation about the pipe axis to the speed of movement along the axis needs to be changed, so that the thread gap control of the threaded pipe is more uniform and accurate.

The length of the guiding mechanism along the axial direction of the pipe is at least equal to that of the pipe supporting structure, and the paying-off mechanism can move along the axial direction of the pipe along the guiding mechanism. Before the winding step, the paying-off mechanism is arranged on the guiding mechanism and corresponds to one end of the pipe placed on the pipe supporting mechanism, and the free end of the wire rod in the wire storage part is led out by the lead part and is fixed on the pipe placed on the pipe supporting mechanism. It will be appreciated that the pipe placed on the pipe support mechanism may be provided at one end of the pipe support mechanism or may be provided at a middle portion of the pipe support mechanism.

When the winding step is carried out, the driving mechanism drives the pipe supporting mechanism to rotate around the axial direction of the pipe, meanwhile, the paying-off mechanism is driven to move along the axial direction of the pipe, the paying-off mechanism moves, and meanwhile, wires in the wire storage part are paid off through the wire leading part, the paying-off mechanism moves along the axial direction of the pipe, and the pipe is driven by the pipe supporting mechanism to rotate around the axial direction of the pipe, so that the paying-off mechanism can uniformly wind the wires on the pipe to form a spiral line. Meanwhile, because the fixed ratio exists between the rotation of the pipe supporting mechanism around the pipe axis and the speed of the paying-off mechanism moving along the axis, the thread clearance distance of the threaded pipe can be controlled by controlling the ratio value between the two speeds, and the accurate control of the thread clearance is realized.

When the threaded pipe with the thread spacing is produced, the lead screw with the non-thread spacing is replaced through the lead screw replacement part, and the ratio of the moving speed of the paying-off mechanism along the axial direction of the pipe to the rotating speed of the pipe supporting mechanism around the pipe shaft is changed, so that the thread spacing of the produced threaded pipe is changed. The threaded pipe production device can meet the requirement of producing threaded pipes with different types on the same equipment, and reduces the cost of preparing a plurality of production equipment due to different production sizes.

After the winding step is finished, the invention carries out the forming step, the forming mechanism is arranged at one end of the pipe supporting mechanism, and the forming treatment of the threaded pipe is finished by extruding the pipe with the winding step to the other end of the pipe supporting mechanism. It will be appreciated that the clearance distance of the threaded pipe may also be controlled by varying the degree of compression of the forming mechanism.

When the threaded pipes with different radial dimensions are produced, the pipe supporting parts with different radial dimensions are replaced through the supporting replacement parts, so that the threaded pipes with different types can be produced on the same equipment, and the cost for preparing a plurality of production equipment due to different production dimensions is reduced.

In another aspect, embodiments of the present application further provide a method for automatically forming a threaded pipe, the threaded pipe being made of a degradable plastic, including:

supporting the pipe radially along the pipe using the pipe support mechanism;

placing the wire rod by using the paying-off mechanism, and leading the wire rod out to the pipe;

the driving mechanism is used for driving the pipe supporting mechanism to drive the pipe to rotate around the pipe shaft, and meanwhile driving the paying-off mechanism to move along the axial direction of the pipe and covering the axial length range of the pipe so as to be suitable for winding the wire on the surface of the pipe;

the tube support mechanism is replaced by the support replacement portion and/or the lead screw is replaced by the lead screw replacement portion using a replacement mechanism.

In summary, by providing the pipe supporting mechanism capable of rotating around the pipe axis under the drive of the driving mechanism and the paying-off mechanism capable of moving along the pipe axis under the drive of the driving mechanism, the winding step of winding the wire on the pipe is performed under the drive of the driving mechanism, and the ratio between the rotation speed of the pipe supporting mechanism and the moving speed of the paying-off mechanism is constant during the winding step, so that the wire can be uniformly wound on the pipe. Meanwhile, the control of the thread clearance distance can be realized by adjusting the speed ratio between the two, specifically, replacing the screw rods with different thread clearances through the screw rod replacing part in the replacing mechanism. The forming mechanism is arranged at one end of the pipe supporting mechanism, and the pipe is extruded from one end of the pipe supporting mechanism to the other end of the pipe supporting mechanism, so that extrusion forming of the pipe wound with the wire is completed, and finally the threaded pipe is formed. The length of the threaded pipe and the thread clearance distance are controlled by controlling the extrusion degree of the forming mechanism. The pipe supporting mechanisms with different radial dimensions are replaced through the supporting replacement part, so that the requirement of producing threaded pipes with different radial dimensions is met. The automatic forming device for the threaded pipe can ensure the forming accuracy of the threaded pipe, can be flexibly changed according to requirements, can produce threaded pipes of different types, and reduces the complexity of production operation and the production cost.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of an automatic forming device for a threaded pipe according to an embodiment of the present invention;

FIG. 2 is a schematic view of an automatic forming device for a threaded pipe according to an embodiment of the present invention;

FIG. 3 is a partial exploded view of a support frame shaping mechanism of an automatic threaded pipe shaping device according to an embodiment of the present invention;

FIG. 4 is a partial exploded view of a driving mechanism of a support frame of an automatic threaded pipe forming device according to an embodiment of the present invention;

FIG. 5 is a side view of an automatic forming device for threaded pipes according to an embodiment of the present invention;

FIG. 6 is a schematic view of an embodiment of an apparatus for automatically forming threaded pipes according to an embodiment of the present invention;

fig. 7 is a schematic view of a supporting seat portion of an automatic forming device for a threaded pipe according to an embodiment of the present invention.

Reference numerals:

an automatic screw pipe forming device 100; a support base 1; a pipe support mechanism 2; a support rod 21; a first fixing member 22; a second fixing member 23; a paying-off mechanism 3; a wire storage section 31; a lead portion 32; a shaping mechanism 4; the extension device 41; a guide 411; an extrusion 412; a drive mechanism 5; a first drive gear 52; a second drive gear 53; a lead screw 54; a replacement mechanism 7; a tube replacement part 71; a support switch plate 711; support mounting holes 712; a first pin set 713; a first primary pin 714; a first drive pin 715; a first tubing pin 716; a screw replacement unit 72; a lead screw switching plate 721; screw mounting hole 722; a second pin set 723; a second main pin 724; a second drive pin 725; a second tubing pin 726.

Detailed Description

The description of the embodiments of this specification should be taken in conjunction with the accompanying drawings, which are a complete description of the embodiments. In the drawings, the shape or thickness of the embodiments may be enlarged and indicated simply or conveniently. Furthermore, portions of the structures in the drawings will be described in terms of separate descriptions, and it should be noted that elements not shown or described in the drawings are in a form known to those of ordinary skill in the art.

Any references to directions and orientations in the description of the embodiments herein are for convenience only and should not be construed as limiting the scope of the invention in any way. The following description of the preferred embodiments will refer to combinations of features, which may be present alone or in combination, and the invention is not particularly limited to the preferred embodiments. The scope of the invention is defined by the claims.

The present embodiment provides an automatic forming device 100 for a threaded pipe according to an embodiment of the present invention, including: a support base 1; a pipe supporting mechanism 2 for supporting the pipe at least in a radial direction of the pipe; a paying-off mechanism 3 provided with a wire storage portion 31 for placing a wire, and a lead portion 32 for drawing out the wire from the wire storage portion 31 to a pipe; the guiding mechanism is used for guiding the paying-off mechanism 3 to move along the axial direction of the pipe; the shaping mechanism 4 is used for compressing the pipe along the axial direction of the pipe; the driving mechanism 5 is used for driving the pipe supporting mechanism 2 to drive the pipe to rotate around the pipe shaft, and simultaneously driving the paying-off mechanism to move along the axial direction of the pipe and covering the axial length range of the pipe through the lead screw so as to be suitable for winding wires on the surface of the pipe; the replacement mechanism 7 includes a support replacement portion 71 for replacing the pipe support mechanism or a screw replacement portion 72 for replacing the screw 54.

As shown in fig. 1, the pipe is fitted over the pipe support mechanism 2, and can rotate around the pipe axis following the pipe support mechanism 2 by being driven by the drive mechanism 5. As shown in fig. 2, the paying-out mechanism 3 is provided with a wire storage portion 31 for placing a wire, wherein the wire storage portion 31 may be provided as a spool, and the wire storage portion 31 rotates with the movement of the paying-out mechanism 3 to pay out the wire wound around the wire storage portion 31. The lead portion 32 is provided on a side of the payout mechanism 3 close to the pipe support mechanism 2, and is configured to draw out a free end of the wire wound around the wire storage portion 31 from the wire storage portion 31 toward the pipe. The lead portion 32 may be selectively provided as a lead hole through which the wire is passed.

In some embodiments, the wire storage part 31 includes two clamping members and a spring, the spool is placed between the two clamping members, and the two clamping members are pressed by the spring to support the spool.

In some embodiments, the lead portion 32 is provided as a lead hole through which the free end of the wire is led out, and further, a tubule extending out of the lead hole is provided in the lead hole through which the free end of the wire is led out.

The paying-off mechanism 3 is provided corresponding to the pipe supporting structure, and is movable along the pipe shaft by the driving of the driving mechanism 5, and is rotatable around the pipe shaft by the pipe supporting structure and movable along the pipe shaft by the paying-off mechanism 3, and the wire winding value in the wire storage 31 of the paying-off mechanism 3 is set on the pipe supporting mechanism 2.

The guide mechanism is arranged in parallel with the axial direction of the pipe for supporting the paying-off mechanism 3 in the radial direction and enabling the paying-off mechanism 3 to move along the pipe axis along the guide mechanism.

The shaping mechanism 4 is arranged at one end of the pipe supporting structure, the pipe supporting structure is matched with the paying-off mechanism 3, after the wire is wound on the pipe, the shaping mechanism 4 pushes one end of the pipe to move towards the other end of the pipe, and the pipe is shaped after being extruded. Wherein, the shaping mechanism 4 can drive the shaping mechanism 4 to shape the pipe through driving devices such as an air pump, a motor and the like.

The driving mechanism 5 may be driven electrically or manually, and when electric driving is selected, a driving device such as a motor or a cylinder may be selected; in the case of manual driving, a manual crank or the like may be selected.

In particular, when the drive mechanism 5 drives the tubular support structure to rotate axially around the tubular, the movement is also transmitted synchronously to the payout mechanism 3, i.e. there is an associative cooperation between the rotational movement of the tubular support structure around the tubular axis and the movement of the payout mechanism 3 along the tubular axis, the ratio between the angular velocity of the rotational movement around the tubular axis and the linear velocity of the movement along the tubular axis being fixed. According to setting up different ratios, can control the speed ratio between the rotation of tubular product supporting structure around tubular product axis and the unwrapping wire mechanism 3 along tubular product axis removal, through control speed ratio, just can accurate control screw thread clearance width. That is, it is desirable to select different values of thread gap when producing a threaded pipe, and only the ratio of the speed of rotation about the pipe axis to the speed of movement along the axis needs to be changed, so that the thread gap control of the threaded pipe is more uniform and accurate.

The length of the guide mechanism in the axial direction of the pipe is set to be at least equal to that of the pipe supporting structure, and the paying-off mechanism 3 can move in the axial direction of the pipe along the guide mechanism. Before the winding step, the wire releasing mechanism 3 is provided on the guide mechanism and corresponds to one end of the pipe placed on the pipe supporting mechanism 2, and the free end of the wire in the wire storage portion 31 is led out by the wire guiding portion 32 and fixed on the pipe placed on the pipe supporting mechanism 2. It will be appreciated that the pipe placed on the pipe support mechanism 2 may be provided at one end of the pipe support mechanism 2 or may be provided at an intermediate portion of the pipe support mechanism 2.

When the winding step is performed, the driving mechanism 5 drives the pipe supporting mechanism 2 to rotate around the pipe axial direction, meanwhile, drives the paying-off mechanism 3 to move along the pipe axial direction, and the paying-off mechanism 3 is moved, meanwhile, the wires in the wire storage part 31 are paid off through the wire guide part 32, and the paying-off mechanism 3 moves along the pipe axial direction, and the pipe is driven by the pipe supporting mechanism 2 to rotate around the pipe axial direction, so that the paying-off mechanism 3 can uniformly wind the wires on the pipe to form a thread. Meanwhile, because the fixed ratio exists between the rotation of the pipe supporting mechanism 2 around the pipe axis and the speed of the paying-off mechanism 3 moving along the axis, the thread clearance distance of the threaded pipe can be controlled by controlling the ratio value between the two speeds, and the accurate control of the thread clearance is realized.

Specifically, in some embodiments, the screw 54 with different thread pitches is replaced by the screw replacing part 72, the ratio of the speed of rotation around the pipe axis to the speed of movement along the axis is adjusted to be 1 turn of the pipe supporting mechanism 2 around the pipe axis, and the winding mechanism moves along the pipe axis by 1mm, so that the thread pitch of the formed threaded pipe is 1mm;

in some embodiments, the screw 54 with different thread pitches is replaced by the screw replacing part 72, the speed ratio of rotation around the pipe axis to movement along the axis is adjusted to be adjusted to the speed ratio of 0.5 turn of the pipe supporting mechanism 2 around the pipe axis, and the winding mechanism moves along the pipe axis by 1mm, so that the thread pitch of the formed threaded pipe is 2mm;

in some embodiments, the screw 54 with different thread pitches is replaced by the screw replacing part 72, the speed ratio of rotation around the pipe axis to movement along the axis is adjusted to be adjusted to 1 rotation of the pipe supporting mechanism 2 around the pipe axis, and the winding mechanism moves along the pipe axis by 2mm, so that the thread pitch of the formed threaded pipe is 2mm;

in some embodiments, the screw 54 with different thread pitches is replaced by the screw replacing part 72, the speed ratio of rotation around the pipe axis to movement along the axis is adjusted to be adjusted to 1 rotation of the pipe supporting mechanism 2 around the pipe axis, and the winding mechanism moves along the pipe axis by 3mm, so that the thread pitch of the formed threaded pipe is 3mm;

in some embodiments, the screw 54 with different thread pitches is replaced by the screw replacement part 72, the ratio of the speed of rotation around the pipe axis to the speed of movement along the axis is adjusted to be adjusted to 0.5 rotation of the pipe support mechanism 2 around the pipe axis, and the winding mechanism is moved along the pipe axis by 2mm so that the thread pitch of the formed threaded pipe is 4mm.

After the winding step is completed, the invention performs the forming step, the forming mechanism is arranged at one end of the pipe supporting mechanism 2, and the forming treatment of the threaded pipe is completed by extruding the pipe with the winding step completed towards the other end of the pipe supporting mechanism 2. It will be appreciated that the clearance distance of the threaded pipe may also be controlled by varying the degree of compression of the forming mechanism.

When producing the screwed pipe of different radial dimensions, through supporting the change portion 71, change the tubular product supporting part of different radial dimensions, can satisfy the screwed pipe of production model difference on same equipment, reduce because of producing the size difference, need prepare the cost of a plurality of production facilities.

In summary, by providing the tube supporting mechanism 2 capable of rotating around the tube axis under the drive of the driving mechanism 5 and the paying-off mechanism 3 capable of moving along the tube axis under the drive of the driving mechanism 5, the two are driven by the driving mechanism 5 to perform the winding step of winding the wire onto the tube, and the ratio between the rotation speed of the tube supporting mechanism 2 and the moving speed of the paying-off mechanism 3 is constant during the winding step, so that the wire can be uniformly wound onto the tube. Meanwhile, the control of the thread gap distance can be achieved by adjusting the speed ratio between the two, specifically, by replacing the screw 54 of different thread gaps by the screw replacing section 72 in the replacing mechanism 7. The forming mechanism is arranged at one end of the pipe supporting mechanism 2, and the pipe is extruded from one end of the pipe supporting mechanism 2 to the other end of the pipe supporting mechanism 2, so that the extrusion forming of the pipe wound with the wire is completed, and the threaded pipe is finally formed. The length of the threaded pipe and the thread clearance distance are controlled by controlling the extrusion degree of the forming mechanism. The need for producing threaded pipes of different radial dimensions is fulfilled by the replacement of the pipe support mechanism of different radial dimensions by the support replacement portion 71. The automatic forming device 100 for the threaded pipe can ensure the forming accuracy of the threaded pipe, can be flexibly changed according to requirements, can produce threaded pipes of different types, and reduces the complexity of production operation and the production cost.

In some embodiments, the support changing portion 71 includes a pair of support switching disks 711 disposed on the support base opposite to each other and rotatably about a first axis parallel to the pipe axial direction, and the support switching disks 711 are provided with a plurality of support mounting holes 712 for correspondingly penetrating and supporting a plurality of pipe support mechanisms, and the plurality of support mounting holes 712 are circumferentially equally spaced about the first axis to be adapted to be rotated about the first axis by the support switching disks 711 such that the pipe support mechanism corresponding to any one of the support mounting holes 712 is associable with the driving mechanism while the pipe support mechanisms corresponding to the remaining support mounting holes 712 are unassociated with the driving mechanism.

A pair of support switch plates 711 are rotatably disposed on the support base about a first axis parallel to the pipe axial direction and opposite to each other, and each support switch plate 711 is provided with a plurality of support mounting holes 712 for supporting a plurality of pipe supporting mechanisms therethrough. Wherein the radial dimensions of the plurality of tube support mechanisms may vary. Each support mounting hole 712 is the same size and different sized tube support mechanisms are secured to the support mounting holes 712 by mounts not shown.

The plurality of support mounting holes 712 are circumferentially equally spaced about the first axis to accommodate rotation about the first axis by the support switch disk 711 such that a tube support mechanism corresponding to any one support mounting hole 712 may be associated with a drive mechanism while tube support mechanisms corresponding to the remaining support mounting holes 712 are not associated with a drive mechanism; in some embodiments, the support mounting holes 712 are provided in two, i.e., 180 ° between the support mounting holes 712, at which time one of the two tube support mechanisms can be selected for association with the drive mechanism by rotating the support switching disk 711, while the remaining tube support mechanisms corresponding to the support mounting holes 712 are not associated with the drive mechanism; in some embodiments, the support mounting holes 712 are provided in three, i.e., the angle between the support mounting holes 712 is 120 °, one of the three tube support mechanisms can be selected for association with the drive mechanism by rotating the support switch plate 711, while the remaining tube support mechanisms corresponding to the support mounting holes 712 are not associated with the drive mechanism. In some embodiments, the support mounting holes 712 are provided in four, i.e., at 90 ° angles between the support mounting holes 712, at which time one of the four tube support mechanisms can be selected for association with the drive mechanism by rotating the support switch plate 711, while the remaining tube support mechanisms corresponding to the support mounting holes 712 are not associated with the drive mechanism. It is conceivable that more than four support mounting holes 712 are also within the scope of the present invention, and only four support mounting holes 712 are shown as an example, but not limited thereto.

The extension device 41 comprises an extrusion part 412 and a guide part 411 detachably connected with the extrusion part 412, the extrusion part 412 is sleeved at one end of the pipe supporting mechanism 2 far away from the driving mechanism 5, the guide part 411 is slidably arranged on the guide mechanism 6, and when the extrusion part 412 is connected with the guide part 411, the extrusion part 412 moves along the pipe supporting mechanism 2 along the direction parallel to the pipe shaft along the guide mechanism 6 when the guide part 411 moves along the direction parallel to the pipe shaft, so that the pipe is shaped.

When the pipe support mechanism 2 is replaced by rotating the support changeover disk 711, the pressing member 412 is detached from the guide 411 and separated from the pipe support mechanism 2 from the end of the pipe support mechanism 2 remote from the drive mechanism 5. After the pipe support mechanism 2 is replaced by rotating the support changeover plate 711, the extrusion member 412 is sleeved back to the pipe support mechanism 2 from the end of the pipe support mechanism 2 remote from the drive mechanism 5, and is again connected and fixed to the guide 411.

Further, the support changing portion 71 further includes a first pin set 713 for effecting the association adapted for the drive mechanism to drive the pipe support mechanism for rotation about the pipe axis.

When the first pin group 713 is used for fixing the driving mechanism and the pipe supporting mechanism and a different pipe supporting mechanism needs to be replaced, the first pin group 713 is only required to be disassembled to release the fixing of the driving mechanism and the pipe supporting mechanism, and after the pipe supporting mechanism is replaced, the connection between the pipe supporting mechanism and the driving mechanism is realized through the pins again.

Further, the first pin group 713 includes a first main pin 714 connecting the driving mechanism and the pipe supporting mechanism, a first driving pin 715 fixing the first main pin 714 and the driving mechanism, and a first pipe pin 716 fixing the first main pin 714 and the pipe supporting mechanism.

Wherein, the first main pin 714 is penetrated by the driving mechanism, is parallel to the pipe shaft and penetrates between the driving mechanism and the pipe supporting mechanism, one end part of the first main pin 714 is arranged on the driving mechanism, and the other end part is arranged on the pipe supporting mechanism; the first drive pin 715 is arranged perpendicular to the pipe axis, and connects the drive mechanism with the first main pin 714, so that the first main pin 714 rotates around the pipe axis along with the rotation of the drive mechanism; the first tubing pin 716 is disposed perpendicular to the tubing axis, connecting the tubing support mechanism with the first primary pin 714 such that the tubing support mechanism rotates about the tubing axis as the first primary pin 714 rotates.

In some embodiments, the support exchanging portion 71 further includes a first fixing member for fixing the support changeover plate 711 to the support base when the driving mechanism drives the pipe support mechanism.

The first fixing member is not shown in the drawings, and the first fixing member is provided so that when the driving mechanism is associated with the pipe supporting mechanism and the driving mechanism drives the pipe supporting mechanism to rotate, the supporting switch plate 711 can be kept stationary as compared with the supporting seat, and the association of the driving mechanism and the pipe supporting mechanism is prevented from being influenced or even damaged by the rotation of the supporting switch plate 711.

In some embodiments, the screw replacing portion 72 includes a pair of screw switching discs 721 opposite to each other and rotatably disposed on the support base about a second axis parallel to the axial direction of the pipe, and a plurality of screw mounting holes 722 are provided on the screw switching discs 721 to correspondingly support the plurality of screws 54 therethrough, the plurality of screw mounting holes 722 being circumferentially equally spaced about the second axis to be adapted to be rotated about the second axis by the screw switching discs 721 such that the screws 54 corresponding to any one screw mounting hole 722 may be associated with a driving mechanism while the screws 54 corresponding to the remaining screw mounting holes 722 are not associated with the driving mechanism.

A pair of screw conversion plates 721 are rotatably disposed on the support base opposite to each other about a second axis parallel to the axial direction of the pipe, and a plurality of screw mounting holes 722 are provided on each screw conversion plate 721 for correspondingly penetrating and supporting the plurality of screws 54. Wherein there may be a difference in radial dimensions of the plurality of lead screws 54. Each screw mounting hole 722 is the same size, and screws 54 of different sizes are secured to the screw mounting holes 722 by mounts not shown.

The plurality of lead screw mounting holes 722 are circumferentially equally spaced about the second axis to accommodate rotation about the second axis by the lead screw conversion disk 721 such that a lead screw 54 corresponding to any lead screw mounting hole 722 may be associated with a drive mechanism while lead screws 54 corresponding to the remaining lead screw mounting holes 722 are not associated with a drive mechanism; in some embodiments, the screw mounting holes 722 are provided in two, that is, the angle between the screw mounting holes 722 is 180 °, at this time, one of the two screws 54 can be selected to be associated with the driving mechanism by rotating the screw switching plate 721, while the screws 54 corresponding to the remaining screw mounting holes 722 are not associated with the driving mechanism; in some embodiments, the screw mounting holes 722 are provided in three, i.e., the angle between the screw mounting holes 722 is 120 °, one of the three screws 54 may be selected for association with a drive mechanism by rotating the screw switching plate 721, while the screws 54 corresponding to the remaining screw mounting holes 722 are not associated with a drive mechanism. In some embodiments, the screw mounting holes 722 are provided in four, i.e., the angle between the screw mounting holes 722 is 90 °, at which time one of the four screws 54 may be selected for association with a drive mechanism by rotating the screw switching plate 721 while the screws 54 corresponding to the remaining screw mounting holes 722 are not associated with a drive mechanism. It is conceivable that more than four screw mounting holes 722 are also within the scope of the present invention, and only four screw mounting holes 722 are shown as an example, but not limited thereto.

Further, the lead screw replacement portion 72 also includes a second set of pins 723 for effecting the association adapted for the drive mechanism to drive the lead screw 54 in rotation and the payout mechanism in axial movement along the tubular.

When the second pin group 723 is used for fixing the drive mechanism and the screw 54 and a different screw 54 needs to be replaced, the second pin group 723 is only required to be detached to release the fixing of the drive mechanism and the screw 54, and after the screw 54 is replaced, the connection between the screw 54 and the drive mechanism is realized again through the pins.

Further, the second pin set 723 includes a second main pin 724 connecting the drive mechanism and the lead screw 54, a second drive pin 725 fixing the second main pin 724 and the drive mechanism, and a second pipe pin 726 fixing the second main pin 724 and the lead screw 54.

Wherein, the second main pin 724 is parallel to the pipe shaft and is penetrated between the driving mechanism and the screw rod 54 by penetrating through the driving mechanism, one end part of the second main pin 724 is arranged on the driving mechanism, and the other end part is arranged on the screw rod 54; the second driving pin 725 is perpendicular to the pipe shaft, and connects the driving mechanism and the second main pin 724, so that the second main pin 724 rotates around the pipe shaft along with the rotation of the driving mechanism; the second tubing pin 726 is disposed perpendicular to the tubing axis, connecting the lead screw 54 with the second main pin 724 such that rotation of the lead screw 54 about the tubing axis occurs with rotation of the second main pin 724.

In some embodiments, the screw replacing portion 72 further includes a second fixing member for fixing the screw switching plate 721 to the supporting base when the driving mechanism drives the screw 54 to rotate.

The second fixing member is not shown in the drawings, and is provided so that when the driving mechanism is associated with the screw 54 and the driving mechanism drives the screw 54 to rotate, the screw switching plate 721 can be kept stationary as compared with the supporting seat, and the association of the driving mechanism with the screw 54 is prevented from being affected or even causing damage to the apparatus due to the rotation of the screw switching plate 721.

In some embodiments, the driving mechanism includes a driving input device, a first driving wheel and a second driving wheel, the driving input device driving the first driving wheel and the second driving wheel to rotate; the first driving wheel is connected with the pipe supporting mechanism and is suitable for driving the pipe supporting mechanism to rotate around the pipe shaft, and the second driving wheel is connected with the screw rod and is suitable for driving the screw rod to rotate.

The drive input device can be provided as a manual input device or an electric input device, wherein the manual input device can be a rocking handle, a rotating wheel or the like. The electric input device can selectively adopt motor input. The drive input device is capable of simultaneously driving the first drive wheel 52 and the second drive wheel 53 to rotate. The first driving wheel 52 is arranged concentrically with the pipe supporting mechanism 2, and when the first driving wheel 52 rotates, the pipe supporting mechanism 2 is driven to axially rotate around the pipe. The second driving wheel 53 is engaged with the screw 54, and when the second driving wheel 53 rotates, the screw 54 is driven to rotate, and the half-open nut engaged with the screw 54 moves along the screw 54.

Further, the driving input device and the first driving wheel 52 are coaxially arranged, and the driving device axially rotates along the pipe to drive the first driving wheel 52 to rotate; the first driving wheel 52 and the second driving wheel 53 are driven by a driving belt.

In some embodiments, the driving device is disposed on the supporting seat, and is driven by the first driving wheel 52 and the second driving wheel 53 through a driving belt.

On the other hand, the embodiment of the application also provides an automatic forming method of the threaded pipe, which comprises the following steps: supporting the pipe radially along the pipe using the pipe support mechanism; placing the wire rod by using the paying-off mechanism, and leading the wire rod out to the pipe; the driving mechanism is used for driving the pipe supporting mechanism to drive the pipe to rotate around the pipe shaft, and meanwhile driving the paying-off mechanism to move along the axial direction of the pipe and covering the axial length range of the pipe so as to be suitable for winding the wire on the surface of the pipe; the tube support mechanism is replaced by the support replacement portion and/or the lead screw is replaced by the lead screw replacement portion using a replacement mechanism.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.

Claims (10)

1. An automatic forming device for a threaded pipe made of degradable plastic, characterized in that it comprises:

a support base (1);

a pipe supporting mechanism (2) for supporting the pipe at least in a radial direction of the pipe;

a wire releasing mechanism (3) provided with a wire storage part (31) for placing a wire, and a lead part (32) for leading out the wire from the wire storage part (31) to the pipe;

a shaping mechanism (4) for axially compressing the tubing;

the driving mechanism (5) is used for driving the pipe supporting mechanism (2) to drive the pipe to rotate around the pipe shaft, and simultaneously driving the paying-off mechanism (3) to move along the axial direction of the pipe and covering the axial length range of the pipe through the lead screw (54) so as to be suitable for winding the wire on the surface of the pipe;

the guiding mechanism is used for guiding the paying-off mechanism (3) to move along the axial direction of the pipe;

the replacement mechanism (7) comprises a support replacement part (71) for replacing the pipe support mechanism (2) and/or a screw replacement part (72) for replacing the screw (54).

2. The automatic forming device for threaded pipes according to claim 1, characterized in that said support changing portion (71) comprises a pair of support changeover disks (711) which are opposite to each other and are rotatably provided on said support base (1) about a first axis parallel to the axial direction of the pipe, a plurality of support mounting holes (712) being provided on the support changeover disks (711) for correspondingly threading a plurality of said pipe support mechanisms (2), said plurality of support mounting holes (712) being circumferentially equally spaced about said first axis so as to be adapted to be rotatable about said first axis by said support changeover disks (711) such that a pipe support mechanism (2) corresponding to any one of said support mounting holes (712) is associable with said driving mechanism (5), while a pipe support mechanism (2) corresponding to the remaining said support mounting holes (712) is unassociated with said driving mechanism (5).

3. The automatic forming device of threaded pipes according to claim 2, characterized in that said support exchange (71) further comprises a first set of pins (713) for effecting said association adapted to drive said pipe support mechanism (2) in rotation about said pipe axis by said drive mechanism (5).

4. A threaded pipe automatic forming device according to claim 3, characterized in that the first set of pins (713) comprises a first main pin (714) connecting the driving mechanism (5) with the pipe supporting mechanism (2), a first driving pin (715) fixing the first main pin (714) with the driving mechanism (5), and a first pipe pin (716) fixing the first main pin (714) with the pipe supporting mechanism (2).

5. The automatic forming device of threaded pipes according to claim 2, characterized in that said support exchange portion (71) further comprises a first fixing member for fixing said support conversion disc (711) stationary to said support seat (1) when said drive mechanism (5) drives said pipe support mechanism (2).

6. The automatic screw tube forming device according to claim 2, wherein the screw replacing portion (72) comprises a pair of screw switching discs (721) which are opposite to each other and are rotatably arranged on the supporting base (1) around a second axis parallel to the axial direction of the tube, a plurality of screw mounting holes (722) are arranged on the screw switching discs (721) for correspondingly penetrating and supporting a plurality of screws (54), the plurality of screw mounting holes (722) are circumferentially equidistantly arranged around the second axis so as to be suitable for rotating around the second axis through the screw switching discs (721) so that screws (54) corresponding to any one screw mounting hole (722) can be associated with the driving mechanism (5), and screws (54) corresponding to the rest of the supporting mounting holes (712) are not associated with the driving mechanism (5).

7. The automatic forming device of threaded pipes according to claim 6, characterized in that said screw change (72) further comprises a second set of pins (723) for effecting said association, adapted to drive said screw (54) in rotation by said driving mechanism (5) and to drive said paying-off mechanism (3) in axial movement along said pipe.

8. The automatic thread tube forming device according to claim 7, wherein the second pin group (723) includes a second main pin (724) connecting the driving mechanism (5) and the screw (54), a second driving pin (725) fixing the second main pin (724) and the driving mechanism (5), and a second pipe pin (726) fixing the second main pin (724) and the screw (54).

9. The automatic screw pipe forming device according to claim 6, wherein the screw replacing portion (72) further includes a second fixing member for fixing the bearing conversion plate (711) to rest on the support base (1) when the driving mechanism (5) drives the screw (54) to rotate.

10. An automatic forming method of a threaded pipe made of a degradable plastic, characterized in that the forming device according to any one of claims 1 to 9 is used, the forming method comprising:

supporting the pipe radially along the pipe using the pipe support mechanism;

placing the wire rod by using the paying-off mechanism, and leading the wire rod out to the pipe;

the driving mechanism is used for driving the pipe supporting mechanism (2) to drive the pipe to rotate around the pipe shaft, and meanwhile driving the paying-off mechanism (3) to move along the axial direction of the pipe and covering the axial length range of the pipe so as to be suitable for winding the wire on the surface of the pipe;

the tube support mechanism is replaced by the support replacement portion and/or the lead screw is replaced by the lead screw replacement portion using a replacement mechanism.

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