CN116238081A - 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 invention can ensure the accuracy of the forming of the threaded pipe.

Description

Automatic forming device and forming method for threaded pipe

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 forming a threaded pipe: 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 by manual operation to form threads, and the preparation method cannot control the winding force and cannot ensure that the pipe 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 a threaded pipe, which are convenient for mass production of the threaded pipe.

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 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.

In some embodiments, the guide mechanism includes a guide rod extending axially along the tubing, and the base of the payout mechanism is slidably disposed on the guide rod.

In some embodiments, the drive mechanism includes a drive rod and a drive fitting coupled to the drive rod by a selection connector adapted to have a first state coupled to the drive rod by the selection connector and a second state decoupled from the drive rod.

In some embodiments, the drive rod is a lead screw and the drive fitting is a half-open nut.

In some embodiments, the selection connector is an elastic member, so that the half-open nut is elastically press-fit around the screw rod through the elastic member to achieve the first state, and is disengaged from the screw rod against the elastic force to achieve the second state.

In some embodiments, the drive mechanism comprises: the driving input device drives 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.

In some embodiments, the driving input device is coaxially arranged with the first driving wheel, and the driving device rotates along the axial direction of the pipe to drive the first driving wheel to rotate; the first driving wheel and the second driving wheel are driven by a driving belt.

In some embodiments, the pipe supporting mechanism comprises a supporting rod for being sleeved by the pipe and supporting the pipe in the radial direction, and a first fixing piece and a second fixing piece which are arranged at two ends of the supporting rod, wherein the first fixing piece and/or the second fixing piece are/is slidably arranged on the supporting rod along the extending direction of the supporting rod, and the first fixing piece is arranged at one end, far away from the driving mechanism, of the second fixing piece and is used for being matched with the second fixing piece to support the pipe in the axial direction.

In some embodiments, the first fixing member is provided with a first locking member for fixing the first fixing member at the position of the support rod; the second fixing piece is provided with a second locking piece which is used for fixing the position of the second fixing piece on the supporting rod.

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;

and 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.

According to the embodiment of the invention, the pipe is sleeved on the pipe supporting mechanism and can rotate around the pipe shaft along with the pipe supporting mechanism under the driving of the driving mechanism, the wire paying-off mechanism is provided with a wire storage part for placing wires, the wires wound on the wire storage part are paid out, the wire paying-off mechanism is arranged corresponding to the pipe supporting mechanism and can move along the pipe shaft under the driving of the driving mechanism, the pipe supporting mechanism rotates around the pipe shaft and the wire paying-off mechanism moves along the pipe shaft, and the wire winding value in the wire storing part of the wire paying-off mechanism is set on the pipe supporting mechanism; the guide mechanism is arranged in parallel with the axial direction of the pipe and is used for supporting the paying-off mechanism in the radial direction and enabling the paying-off mechanism to move along the axis of the pipe along the guide mechanism.

Through carrying out synchronous motion with the unwrapping wire mechanism and the tubular product supporting mechanism that set up, the wire rod that will set up in unwrapping wire mechanism stores up line portion, draws forth the back through the lead wire portion, twines on the tubular product that sets up on tubular product supporting mechanism, because of tubular product supporting structure moves along tubular product axial direction when rotatory around tubular product, tubular product supporting mechanism cooperates with unwrapping wire mechanism, twines the wire rod on the tubular product, realizes the winding process of tubular product.

By arranging 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 carried out under the drive of the driving mechanism, and the ratio between the rotating 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, and meanwhile, the control of the thread clearance distance can be realized by adjusting the speed ratio between the rotating speed and the moving speed, and the automatic forming device for the threaded pipe can ensure the accuracy of the threaded pipe forming and realize mass production.

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 diagram of a paying-off mechanism of an automatic forming device for a threaded pipe according to an embodiment of the present invention;

FIG. 3 is a schematic view of a driving mechanism of a supporting seat of an automatic forming device for threaded pipes according to an embodiment of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

fig. 5 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 base 33; a half-open nut 34; a selection connector 35; a shaping mechanism 4; the extension device 41; a guide 411; an extrusion 412; a drive mechanism 5; a drive input device 51; a first drive wheel 52; a second drive wheel 53; a screw 54; a belt 56; a guide mechanism 6.

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 6 is used for guiding the paying-off mechanism 3 to move 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 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 wires on the surface of the pipe.

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 one embodiment, 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.

In one embodiment, the guide mechanism 6 is arranged axially parallel to the tube for supporting the payout mechanism 3 in a radial direction and enabling the payout mechanism 3 to move along the axis of the tube along the guide mechanism 6.

In one embodiment, the driving mechanism 5 may be driven by electric or manual, where in the case of selecting electric driving, 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 the embodiment of the invention, the wire rod arranged in the wire storage part 31 of the wire releasing mechanism 3 is led out through the wire leading part 32 by synchronously moving the arranged wire releasing mechanism 3 and the pipe supporting mechanism 2, and then is wound on the pipe arranged on the pipe supporting mechanism 2, and the wire releasing mechanism 3 moves along the axial direction of the pipe while the pipe supporting mechanism rotates around the axial direction of the pipe, so that the wire rod is wound on the pipe by the cooperation of the pipe supporting mechanism 2 and the wire releasing mechanism 3, and the winding procedure of the pipe is realized.

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 6 in the pipe axial direction is set to be at least equal to the pipe supporting structure, and the payout mechanism 3 can move in the pipe axial direction along the guide mechanism 6. Before the winding step, the wire releasing mechanism 3 is provided on the guide mechanism 6 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.

In one embodiment, 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 1 turn of the pipe supporting mechanism 2 around the pipe axis, and the winding mechanism moves 1mm along the pipe axis, so that the thread pitch of the formed threaded pipe is 1mm;

in one embodiment, 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 the speed of rotation of the pipe supporting mechanism 2 around the pipe axis by 0.5 turn, and the winding mechanism moves by 1mm along the pipe axis, so that the thread pitch of the formed threaded pipe is 2mm;

in one embodiment, the ratio of the speed of rotation about the pipe axis to the speed of movement along the axis is adjusted to be 1 turn of the pipe support mechanism 2 about the pipe axis, the winding mechanism being moved 2mm along the pipe axis so that the thread pitch of the formed threaded pipe is 2mm;

in one embodiment, 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 1 turn of the pipe supporting mechanism 2 around the pipe axis, and the winding mechanism moves 3mm along the pipe axis, so that the thread pitch of the formed threaded pipe is 3mm;

in one embodiment, the ratio of the speed of rotation about the pipe axis to the speed of movement along the axis is adjusted to the point that the pipe support mechanism 2 rotates about the pipe axis 0.5 turns and the winding mechanism moves 2mm along the pipe axis such that the thread pitch of the formed threaded pipe is 4mm.

In the embodiment of the invention, by arranging the pipe supporting mechanism 2 capable of rotating around the axis of the pipe under the drive of the driving mechanism 5 and the paying-off mechanism 3 capable of moving along the axis of the pipe under the drive of the driving mechanism 5, the winding step of winding the wire on the pipe is performed under the drive of the driving mechanism 5, and the ratio between the rotating speed of the pipe 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 on the pipe. Meanwhile, the control of the thread clearance distance can be realized by adjusting the speed ratio between the two. The shaping 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 extrusion molding of the pipe wound with the wire rod 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 shaping mechanism. The automatic forming device 100 for the threaded pipe can ensure the forming accuracy of the threaded pipe and realize mass production.

In one embodiment, the guiding mechanism 6 comprises a guiding rod extending along the axial direction of the pipe and a base 33 arranged on the paying-off mechanism 3, and the base 33 is slidably arranged on the guiding rod.

The paying-off mechanism 3 is arranged on the guide rod through a base 33, and the base 33 is slidably arranged on the guide rod so that the paying-off mechanism 3 can perform sliding motion along the guide rod. Wherein the guiding rod is parallel to the axis of the pipe, i.e. the paying-off mechanism 3 moves along the axial direction of the pipe when sliding along the guiding rod. The guiding rod provides radial supporting force for the pipe for the paying-off mechanism 3.

In one embodiment, the drive mechanism 5 comprises a screw 54 extending in an axial direction and a half-open nut 34 selectively sleeved on the screw 54, the half-open nut 34 being connected to the pay-off mechanism 3 by a selection connector 35, so as to adapt to a first condition in which the half-open nut 34 is sleeved on the screw 54 by the selection connector 35, and a second condition in which it is disengaged from the screw 54.

The selection connector 35 can be selectively switched between the first state and the second state by an elastic member, a clamping member or a self-locking member.

In the first state, the selection connector 35 connects the half-open nut 34 with the screw 54, and the payout mechanism 3 moves on the screw 54 with the half-open nut 34. The screw 54 extends axially along the pipe so that the payout mechanism 3 moves axially along the pipe as the half nut 34 moves over the screw 54.

In the second state, the half-open nut 34 is disengaged from the lead screw 54, and the pay-off mechanism 3 moves in the extending direction of the guide mechanism 6 under the support of the guide mechanism 6.

In one embodiment, the setting mechanism 4 is further included, when the pipe is set, the extending device 41 of the setting mechanism 4 extends out, the pipe is set, in order to prevent the extending route of the extending device 41 from being blocked by the paying-off mechanism 3, before the setting operation, the semi-open nut 34 is separated from the screw rod 54 by overcoming the elastic force of the elastic piece, and then the paying-off mechanism 3 is moved to a position where the extending device 41 is not blocked any more in a direction away from the setting mechanism 4. By moving the paying-off mechanism 3 in a direction away from the setting mechanism 4, the extending operation of the setting mechanism 4 is more stable.

After the extrusion shaping step of the threaded pipe is completed, the shaped threaded pipe is taken down from the pipe supporting mechanism 2, a new pipe to be shaped is installed on the pipe supporting mechanism 2, the selection connector 35 is enabled to be in a second state by adjusting the selection connector 35, at the moment, the winding mechanism is separated from the screw rod 54, moves along the axial direction of the pipe and adjusts the position under the guidance of the guiding mechanism 6, and the winding mechanism can perform winding without returning to the initial position.

That is, a plurality of tubes to be wound are continuously provided on the tube supporting mechanism 2, and the paying-off mechanism 3 can continue winding from the end point of the next tube after winding is completed, without replacing a new tube to be wound after each winding is completed.

Further, the connector 35 is selected to be an elastic member, so as to be suitable for the half-open nut 34 to be elastically press-fit around the screw 54 through the elastic member to achieve the first state, and to be disengaged from the screw 54 against the elastic force to achieve the second state.

In the first state, the half-open nut 34 is pressed and connected to the screw rod 54 through the elastic piece, so that the paying-off mechanism 3 moves along the axial direction of the pipe under the drive of the driving mechanism 5;

in the second state, the elastic force of the elastic piece is overcome, so that the half-open nut 34 is separated from the screw rod 54, the paying-off mechanism 3 is not moved along with the driving of the driving mechanism 5, at this time, the paying-off mechanism 3 is supported by the guiding mechanism 6, and the paying-off mechanism 3 can move along the guiding mechanism 6.

The selection of the elastic member as the selection connector 35 makes the operation easier when switching the first state and the second state.

As shown in fig. 3 and 4, in one embodiment, the drive mechanism includes: a drive input device 51, a first drive wheel 52, and a second drive wheel 53, the drive input device 51 driving the first drive wheel 52 and the second drive wheel 53 to rotate; the first driving wheel 52 is connected with the pipe supporting mechanism to be suitable for driving the pipe supporting mechanism to rotate around the pipe shaft, and the second driving wheel 53 is connected with the screw 54 to be suitable for driving the screw 54 to rotate.

The drive input device 51 can be provided as a manual input device or an electric input device, wherein the manual input device can be selected from a crank, a wheel, etc. The electric input device can selectively adopt motor input. The driving input device 51 can simultaneously drive the first driving wheel 52 and the second driving 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 meshed with the screw rod 54, and when the second driving wheel 53 rotates, the screw rod 54 is driven to rotate, and the half-open nut meshed with the screw rod 54 moves along the screw rod 54.

In one embodiment, the driving input device 51 is coaxially arranged with the first driving wheel 52, and the driving device rotates along the axial direction of 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 56.

In one embodiment, 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 56.

By changing the gear ratio of the first driving wheel 52 and the second driving wheel 53, it is achieved that there is a difference in the angular speeds of the first driving wheel 52 and the second driving wheel 53. The gear ratios of the first drive wheel 52 and the second drive wheel 53 are selected to be different depending on the thread clearance distance of the threaded pipe required for actual production.

As shown in fig. 1, in some embodiments, the pipe supporting mechanism 2 includes a supporting rod 21 for being sleeved by a pipe and for radially supporting the pipe, and a first fixing member 22 and a second fixing member 23 disposed at two ends of the supporting rod 21, the first fixing member 22 being slidably disposed on the supporting rod 21 along an extending direction of the supporting rod 21, the first fixing member 22 being disposed at an end of the second fixing member 23 remote from the driving mechanism for being engaged with the second fixing member 23 in an axial direction to support the pipe.

The first fixing member 22 is engaged with the second fixing member 23 to fix the pipe material provided on the support rod 21 in the axial direction. The first fixing piece 22 is slidably disposed on the supporting rod 21 along the extending direction of the supporting rod 21, and the position of the first fixing piece 22 disposed on the supporting rod can be adjusted according to the length of the pipe disposed on the supporting rod 21. So that the first fixing member 22 can be cooperatively fixed with the second fixing member 23 regardless of the axial length of the pipe.

In one embodiment, the second fixing member 23 is slidably provided on the support rod in the direction in which the support rod extends.

According to the position where the pipe is sleeved on the supporting rod, the position of the second fixing piece 23 is adjusted, so that the winding step does not need a winding mechanism to return to the starting point.

In one embodiment, the first fixing member 22 is provided with a first locking member for fixing the first fixing member 22 in the position of the support rod 21; the second fixing piece 23 is provided with a second locking piece for fixing the second fixing piece 23 at the position of the supporting rod 21.

Before the winding step, the pipe is sleeved on the supporting rod 21, the first fixing piece 22 and the second fixing piece 23 clamp the pipe from two ends of the pipe, and the pipe is locked through the first locking piece and the second locking piece respectively, so that the positions of the first fixing piece 22 and the second fixing piece 23 are changed due to the rotation of the supporting rod during the subsequent winding, and the effect of axially supporting the pipe is weakened.

As shown in fig. 2, further, the extension apparatus 41 includes a guide 411 and an extrusion 412, the guide 411 being fixedly disposed with the extrusion 412; the guide 411 is slidably arranged on the guide mechanism 6 and moves along the axial direction of the pipe; the pressing member 412 is slidably provided to the pipe supporting mechanism 2 and moves with the movement of the guide 411 to press the pipe.

The guide mechanism 6 assists in supporting the extension device 41 and allows the guide mechanism 6 to extend and retract in the axial direction of the pipe.

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; and 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 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 guiding mechanism (6) for guiding the paying-off mechanism (3) to move along the axial direction of 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 so as to be suitable for winding the wire on the surface of the pipe.

2. An automatic forming device for threaded pipes according to claim 1, characterized in that the guiding mechanism (6) comprises a guiding rod extending in the axial direction of the pipe, to which a base (33) of the paying-off mechanism (3) is slidably arranged.

3. The automated pipe forming apparatus of claim 1, wherein the drive mechanism comprises a drive rod and a drive fitting coupled to the drive rod by a selection connector adapted such that the drive fitting has a first state coupled to the drive rod by the selection connector and a second state decoupled from the drive rod.

4. The automated pipe forming apparatus of claim 3, wherein the drive rod is a screw and the drive fitting is a half-open nut.

5. The automatic thread tube forming device according to claim 4, wherein said selection connector (35) is an elastic member adapted to be elastically press-fitted over said screw (54) by said elastic member to achieve said first state and disengaged from said screw (54) against said elastic force to achieve said second state.

6. An automatic forming device for threaded pipes according to claim 4, characterized in that said driving mechanism (5) comprises: a drive input device (51), a first drive wheel (52) and a second drive wheel (53), the drive input device (51) driving the first drive wheel (52) and the second drive wheel (53) to rotate; the first driving wheel (52) is connected with the pipe supporting mechanism (2) so as to be suitable for driving the pipe supporting mechanism to rotate around the pipe shaft, and the second driving wheel (53) is connected with the screw rod (54) so as to be suitable for driving the screw rod (54) to rotate.

7. The automatic forming device of threaded pipes according to claim 6, characterized in that said driving input means (51) are coaxially arranged with said first driving wheel (52), said driving means rotating axially along said pipe to rotate said first driving wheel (52); the first driving wheel (52) and the second driving wheel (53) are driven by a driving belt (56).

8. The automatic thread pipe forming device according to claim 1, wherein the pipe supporting mechanism (2) comprises a supporting rod (21) for being sleeved by the pipe and supporting the pipe in the radial direction, and a first fixing member (22) and a second fixing member (23) arranged at two ends of the supporting rod (21), wherein the first fixing member (22) and/or the second fixing member (23) are slidably arranged on the supporting rod (21) along the extending direction of the supporting rod (21), and the first fixing member (22) is arranged at one end, far away from the driving mechanism, of the second fixing member (23) and is used for being matched with the second fixing member (23) to support the pipe in the axial direction.

9. The automatic forming device of a threaded pipe according to claim 8, characterized in that the first fixing member (22) is provided with a first locking member (221) for fixing the first fixing member (22) at the position of the support rod (21); the second fixing piece (23) is provided with a second locking piece (231) used for fixing the position of the second fixing piece (23) on the supporting rod (21).

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;

and the driving mechanism 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 so as to be suitable for winding the wire on the surface of the pipe.

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