CN114054539B

CN114054539B - Hard scattered disc winding method, coil production process, winding head and winding unit

Info

Publication number: CN114054539B
Application number: CN202010790246.9A
Authority: CN
Inventors: 练奇; 高峰; 李建国; 李忠伟
Original assignee: Jiangsu Xingrong Hi Tech Co Ltd
Current assignee: Jiangsu Xingrong Hi Tech Co Ltd
Priority date: 2020-08-07
Filing date: 2020-08-07
Publication date: 2024-01-05
Anticipated expiration: 2040-08-07
Also published as: CN114054539A

Abstract

The invention provides a hard state bulk coil winding method of nonferrous metal pipes, a coil production process, a winding head and a winding unit, wherein the hard state bulk coil winding method enables the pipes to be wound, and an innermost pipe and an outermost pipe which are wound with each layer of pipes respectively realize radial inner limit and radial outer limit; and the section of the pipe falling into the winding basket from the pre-bending machine realizes height direction limit without radial limit and the upper side limit of the height direction of the pipe which is being wound and the pipe which is already wound. The influence of centrifugal force brought by high-speed loose coil winding is overcome, high-speed hard loose coil winding is realized, loose coil pipes obtained after winding are orderly arranged, coils similar to densely arranged winding can be realized, and the quality of the loose coil pipes can be ensured under the condition of improving the productivity. Overcomes the defects of the prior art and realizes the aim of the invention of the patent.

Description

Hard scattered disc winding method, coil production process, winding head and winding unit

Technical Field

The invention relates to a hard scattered disc winding method and a coil production process of a nonferrous metal pipe, belongs to the technical field of nonferrous metal pipe processing, in particular to a high-speed hard scattered disc winding technology of the nonferrous metal pipe, and further particularly relates to a high-speed hard scattered disc winding and coil production process of a small-caliber copper and copper alloy pipe.

The invention further relates to hard-state bulk disc winding equipment for nonferrous metal pipes, in particular to a high-speed hard-state bulk disc winding head and a winding unit for nonferrous metal pipes.

Background

In the prior art, the nonferrous metal coil is taken as an example, the copper coil is generally required to be densely wound, and annealing and packaging can be conveniently performed after winding, so that a user can conveniently use the nonferrous metal coil. The coil weight of the copper coil after closely-packed winding is about 100kg-200kg, the outer diameter of the wound coil is about 1000-1100mm, and the height is 300-400mm. The winding machine for closely-spaced winding is provided with winding drums, so that high-speed belt tension winding can be realized, the winding speed is generally equal to or higher than 200m/min and is regarded as high-speed winding, the winding speed of closely-spaced winding can reach 300-400m/min, and the wound pipe rings are orderly and tightly arranged.

The biggest shortcoming of closely spaced winding mode is that the dish weight is lighter, and closely spaced winding mode is because the winding of belt tension causes winding tight in addition, and the user produces the card pipe easily when opening a book on site, and the card pipe can cause user's host computer factory production line to shut down, produces the waste product and increases. In order to solve such problems, winding in a loose disc manner has been gradually started to develop in recent years. The loose coil winding is horizontal layer-by-layer flat winding, the lowest layer is layer 1, and the winding is sequentially carried out from layer 1 to layer 2 and layer 3. The flat winding generally takes an Archimedes spiral line as a winding curve equation, and parameters of a control curve can control a pipe seam between every two circles of pipes to be a fixed value and can control the length of each circle of pipes. In general, a bulk winding machine does not have a winding drum like a close-packed winding machine, and winding is performed under a tension-free working condition, so that each circle and each layer of the wound copper pipe are relatively loose compared with close-packed winding, and the phenomena of disordered layers and disordered circles exist. The inner diameter and the outer diameter of the loose coil winding can be basically unchanged, and the height of the loose coil pipe can be changed according to the change of weight. Because of the flat spreading winding from the bottom to the top, the loose coil winding mode solves the problem of pipe clamping in principle, the unreeling is convenient and the coil is heavy, workers in a user factory are willing to use the coil, and the yield and the efficiency of the workers are greatly improved.

All non-ferrous metal bulk-disc winding is now carried out in conjunction with an in-line annealing unit, i.e. a bulk-disc winding head (or bulk-disc winder) is added after the in-line annealing unit of continuous induction to perform so-called soft state winding. This form of annealing allows annealing of the tubing to be accomplished without the need for a large roller hearth annealing furnace. But it has problems that the cleanliness of the inner wall of the coil cannot reach the standard and the productivity of the equipment is low. Although the on-line annealer can instantly heat and cool the tube, unlike the outside of the tube, the residual oil in the tube cannot volatilize instantly. High pressure purging and low speed operation are the choices that have to be made in order to fully volatilize the residual oil in the pipe. The existing bulk coil winding takes the fact that the actual winding speed is lower than 150m/min, generally 80-120m/min, due to the online annealing, and the inner wall cleanliness is problematic beyond the speed. Therefore, the existing bulk winding is so-called low-speed winding, the speed is far lower than that of close-packed winding, and the productivity of the equipment cannot meet the requirements of users.

Chinese patent CN101402425A, CN108002117A, CN203184295A, CN20670504A, CN207497809a, et al, recorded the research and practice of those skilled in the art in recent years on bulk coil winding, and studied these patents, and found that the research object of these patents was low-speed soft state winding with on-line annealing, and this low-speed winding did not need to consider the influence of centrifugal force during winding, and the coil quality of winding in actual production was slightly poor and there was a phenomenon of staggered coil and staggered layer, but the winding was still stable, and the production could be performed. Therefore, these patents do not address the problem of high speed bulk coil winding, the problem of capacity, and the problem of coil quality of existing bulk coil winding.

The inventor of the present application has been working on searching for another method in the course of bulk coil winding process of nonferrous metal pipes including copper pipes, trying to solve the productivity problem of existing bulk coil winding and the quality problem of coil pipes at the same time, trying to adopt a process similar to close-packed winding, and trying to adopt a high-speed hard state winding and roller hearth annealing process to finish bulk coil winding production of coil pipes.

Because the prior art does not have a high-speed hard-state bulk disc winding technology, the applicant organizes the intensive technicians to conduct research, development and fumbling experiments. The development and testing process is laborious and lengthy, and applicant has encountered significant problems in development and testing: the applicant found that the winding became extremely unstable with increasing winding speed. Taking an internal thread copper pipe with the main flow product phi of 7mm as an example, the winding can be stably performed within 150m/min without the internal and external guardrails, the winding arrangement condition can be met, but the winding similar to close-packed winding is not performed, and the phenomenon of staggered winding and staggered layer winding is caused. Beyond this speed various instabilities appear successively. The layer pipe which is wound at the uppermost layer starts to have irregular shaking from 180 m/min; 200m/min begins not only to be the uppermost layer, even twines good lower floor pipe and also produces very big rocking, and this rocks extremely irregularly, has the height direction to have radial rocking too, has the inner circle to have the outer lane, and it is bigger and bigger to shake at last, and the phenomenon that twines good loose coil pipe production and is similar to resonance leads to whole dish to collapse suddenly, leads to twining failure.

The applicant has found through research and development and multiple experiments that centrifugal force generated by high-speed winding is the most main cause of unstable winding of the loose disc, and has found that the hose (i.e. soft pipe) after on-line annealing is soft in performance, is not easy to shake and is easy to bend and form. The outer surface of the annealed pipe is oilless, the contact surface of the pipe between the layers after winding is astringent, and larger additional force is needed to generate radial dislocation between the layers, namely the soft pipe is not easy to disorder the layers. However, the hard tube (i.e., the hard tube which is not annealed in-line) is different, on the one hand, for the layer of tube being wound, the layer of tube being wound can shake at high frequency under the action of centrifugal force due to the high winding speed; in addition, because the pipe is a hard pipe, the pipe can be very large in the process of falling into the winding frame from the pre-bending machine, and the pipe can fall into the winding frame at an incorrect position due to the excessive jump, so-called staggered winding can be generated, and the problem of wire arrangement is generated; on the other hand, for the well-wound pipe, the oil film on the outer surface of the hard pipe enables the friction force of the well-wound pipe between layers to be much smaller than that of the soft pipe, when the winding speed exceeds a certain limit, the adhesion between the layers of the well-wound pipe can be damaged by centrifugal force, and the pipe between the layers and the rings can shake at a large frequency, so that the well-wound pipe is disordered.

Therefore, the problem of the staggered ring and the disordered layer caused by high-frequency shaking of the pipe due to the centrifugal force during the winding of the high-speed scattered disk is mainly solved, so that the high-speed hard scattered disk winding of the nonferrous metal pipe is realized, and the defects that the productivity is low, the inner wall cleanliness cannot reach the standard, the occasional staggered ring and the disordered layer and the like in the soft low-speed scattered disk winding of the nonferrous metal pipe in the prior art are overcome.

Disclosure of Invention

In order to solve at least one of the problems in the prior art, the invention provides a hard scattered disc winding method of a nonferrous metal pipe, which can overcome the influence of the winding centrifugal force of a high-speed scattered disc, realize the winding of the high-speed scattered disc, greatly improve the productivity, and overcome the quality problems of insufficient inner wall cleanliness, occasional misplacement layers and the like in the conventional soft scattered disc winding, and realize the winding of the hard scattered disc of the pipe. The hard dispersion disc winding method of the nonferrous metal pipe comprises the following steps:

the nonferrous metal pipe is sent into a winding frame by a pre-bending machine under a hard state to be wound in a bulk disc, and the nonferrous metal pipe is subjected to radial limit and height direction limit perpendicular to the radial direction in the bulk disc winding process;

The radial limit comprises: for a tube being wound: limiting the radial inner side of the innermost tube of the layer of tubes being wound when the tubes are wound from inside to outside, and limiting the radial outer side of the outermost tube of the layer of tubes being wound when the tubes are wound from outside to inside; and, for the already wound tube: limiting the radially inner side of the innermost tube of each layer of tubes and limiting the radially outer side of the outermost tube of each layer of tubes;

the height direction limiting comprises: for the section of pipe falling into the winding frame from the pre-bending machine, limiting in the height direction and not limiting in the radial direction; for both the pipe being wound and the pipe already wound: so that the upper side of the height direction is limited.

The hard scattered disc winding method of the nonferrous metal pipe can overcome the influence of centrifugal force caused by high-speed scattered disc winding and realize high-speed hard scattered disc winding. Namely, the hard scattered disc winding method of the invention enables the inner-most tube of the layer of tubes which are wound from inside to outside to limit the inner side in the radial direction, enables the outer-most tube of the layer of tubes which are wound from outside to inside to limit the outer side in the radial direction, and enables the inner-most tube and the outer-most tube which are wound with each layer of tubes to respectively realize the inner side limit in the radial direction and the outer side limit in the radial direction, thereby realizing effective radial limit of each layer of tubes; and the section of the pipe falling into the winding frame from the pre-bending machine realizes height direction limit without radial limit and the upper side limit of the height direction of the pipe which is being wound and the pipe which is already wound. The good limit enables the bulk disc to be wound in the radial direction and the height direction generated by centrifugal force to be overcome in the high-speed winding process, so that the high-speed bulk disc winding becomes possible, and the high-speed hard bulk disc winding of the nonferrous metal pipe can be realized. The applicant experiment proves that the internal thread copper pipe with phi of 7mm can be wound at the speed of 300-400m/min in a stable hard state.

One embodiment of the above-described hard bulk disk winding method of nonferrous metal tubing of the present invention is preferably, for tubing being wound: controlling parameters of the winding curve to control the length of each circle of pipe and the pipe seam between adjacent circles of pipes, so that each circle of pipe of the layer of pipe which is being wound from inside to outside is evenly and flatly wound on the outer ring of the inner circle pipe; so that each turn of the tube of the layer of tube being wound from outside to inside is evenly spread around the inner circumference of the outer tube thereof.

This embodiment is for a tube being wound: the parameters of the winding curve are controlled by the spreading disc to control the length of each circle of pipe and the pipe seam between the adjacent circles of pipes, and the upper side limit of the layer of pipe being wound in the height direction is matched, so that each circle of pipe of the layer of pipe being wound can be wound round by round only according to the requirement of the winding curve without generating staggered circle winding. The winding can produce the effect similar to closely-spaced winding, the winding is neat and compact, and the coil pipe quality is good.

In another embodiment of the hard bulk coil winding method of the nonferrous metal tube of the present invention, preferably, the radial limit is implemented by an inner sidewall and an outer sidewall of the winding frame, and the height limit is implemented by a tube pressing body located at an upper portion of the winding frame. The side wall of the winding frame is adopted to realize radial limit, the pipe pressing body is adopted to realize limit in the height direction, and the device is simple in structure, easy to realize and low in cost.

Further, preferably, the height direction limit is an up-down movement limit. The up-and-down movable limit means that the tube pressing body can realize up-and-down proper displacement in the height direction, so that the limit in the height direction can be realized, and the quality of the tube is not affected by excessive acting force on the tube.

The invention also provides a coil production process of the nonferrous metal pipe, which comprises the steps of carrying out bulk winding on the nonferrous metal pipe by adopting the hard bulk winding method of the nonferrous metal pipe according to any scheme to obtain a coil, and then annealing and internal purging the coil by adopting a roller hearth annealing furnace to obtain the coil of the nonferrous metal pipe.

The process of winding the high-speed hard scattered disc and annealing the roller hearth annealing furnace is a brand new production process of nonferrous metal coil pipes, the winding of the high-speed hard scattered disc is the most critical ring of the whole process, the subsequent annealing of the roller hearth annealing furnace is relatively simple, the annealing of the roller hearth annealing furnace can have sufficient time for internal purging, and the electricity consumption of the annealing of the roller hearth annealing furnace is only 60% of that of the on-line annealing. The high-speed hard bulk coil winding and roller hearth annealing process makes the production process of bulk coil similar to that of traditional close-packed winding process, and has high yield, high quality and low cost.

The invention also provides a winding head for implementing the hard scattered disc winding method of the nonferrous metal pipe according to any one of the technical schemes, which comprises a pre-bending machine, a winding frame, a pipe pressing assembly, a winding frame chassis lifting device, a winding power device and a traversing device, wherein: the pre-bending machine comprises a driving and reversing mechanism, the nonferrous metal pipe is sent to the upper part of the winding frame after passing through the pre-bending machine, and the driving and reversing of the driving and reversing mechanism can control the winding curve of the nonferrous metal pipe; the winding frame comprises an inner side wall, an outer side wall and a winding frame chassis which can move up and down relative to the inner side wall and the outer side wall, the inner side wall, the outer side wall and the winding frame chassis can synchronously rotate around the central axis of the winding frame, the upper end of the winding frame is an opening and is positioned below an outlet of the pre-bending machine, and the nonferrous metal pipe can fall into the opening after passing through the pre-bending machine; the pipe pressing assembly comprises a plurality of pipe pressing bodies, wherein the pipe pressing bodies are positioned at the opening of the winding frame and can be contacted with the nonferrous metal pipe from the upper part in the height direction; the winding frame chassis lifting device can drive the winding frame chassis to move up and down along the central axis of the winding frame relative to the inner side wall and the outer side wall; the winding power device can drive the inner side wall, the outer side wall and the winding frame chassis to synchronously rotate around the central axis of the winding frame; the transverse moving device can drive the winding frame or the pre-bending machine to do reciprocating transverse moving along the direction perpendicular to the winding center line.

The winding head (also called as a winding machine) adopts the inner side wall and the outer side wall of the winding frame to realize radial limit of the pipe when the bulk disc is wound, adopts the pipe pressing body to realize limit of the section of the pipe falling into the winding frame from the pre-bending machine and the upper side of the height direction of the winding pipe, thereby overcoming radial and height-direction shaking generated by centrifugal force when high-speed bulk disc winding is carried out, ensuring the regular arrangement of the pipe without generating mess layers, and realizing the hard bulk disc winding method of the first aspect of the invention, compared with the winding machine of the prior bulk disc coil, improving the yield, ensuring the quality and reducing the cost. In addition, the production process of the nonferrous metal coil pipe can be used for constructing a new production line and a new factory, and the old factory and the old production line can be modified, so that the effects of improving the yield, ensuring the quality and reducing the cost are achieved. For example, a hard-state scattered disc winding head disclosed by the invention can be newly added behind the existing close-packed winding machine, so that an uncoiler, a straightener, a flaw detector, a drying machine, a close-packed winding machine and the like for the original close-packed winding can be kept unchanged, two functions of a production line are realized, close-packed production and high-speed scattered disc production can be performed, and equipment investment can be greatly saved.

In one embodiment of the above winding head of the present invention, preferably, the pre-bending machine further includes a feeding roller and a pre-bending roller, the pre-bending roller includes a first roller, a second roller, and a third roller, and the feeding roller, the first roller, the second roller, and the third roller are sequentially arranged, wherein: the feeding roller, the first roller and the second roller are driving rollers, the winding speed and the feeding length of the nonferrous metal tube are controlled, and the third roller is a driven roller; the advancing and retreating mechanism is connected with the third roller and controls the feeding and/or retreating of the third roller so as to control the winding curve of the nonferrous metal pipe. According to the embodiment, the third roller controlled by the feeding roller, the first roller and the second roller matched with the feeding and retreating mechanism in the pre-bending machine can jointly control the winding curve of the high-speed loose coil, so that layer-changing winding and similar close-packed flat loose coil winding can be realized together with the winding frame chassis lifting device and the traversing device, and the coiled pipe after winding is regular and convenient.

In another embodiment of the above winding head of the present invention, preferably, the winding frame further includes a guardrail lifting device, an inner guardrail is disposed on an inner side wall of the winding frame, an outer guardrail is disposed on an outer side wall of the winding frame, and the guardrail lifting device can drive the inner guardrail and the outer guardrail to do synchronous lifting motion along a central axis of the winding frame. The inner side wall and the outer side wall of the winding frame are designed into guardrails, so that the weight of the winding frame can be reduced, materials can be saved, and the winding condition in the winding frame can be observed; the guardrail lifting device is used for controlling the lifting of the guardrail, so that the coiled pipe can be conveniently taken out after winding is completed.

In still another embodiment of the above winding head of the present invention, preferably, the pipe pressing assembly further includes a bracket, a vertical rod, and a counterweight, wherein the vertical rod is vertically movably installed on the bracket, the upper end of the vertical rod is fixedly connected with the pipe pressing body, the counterweight applies downward pressure to the pipe pressing body in a height direction through the vertical rod, and the bracket is installed on the guardrail lifting device and can perform synchronous lifting movement with the inner guardrail and the outer guardrail. The arrangement mode of the pressing pipe body is various, the movable limiting structure of the pressing pipe body is also various, and the arrangement mode and the structure of the embodiment are adopted, so that the pressing pipe is simple in structure and low in cost under the condition of realizing the technological requirements.

In still another embodiment of the above-described winding head of the present invention, preferably, the pressing pipe body includes a plurality of horizontal pressing pipe bodies located at the same height and radially circumferentially arranged in the winding frame, and a guide pressing pipe body located radially between the outlet of the pre-bending machine and the upper end of the winding frame, the plurality of horizontal pressing pipe bodies being in contact with the uppermost layer of the nonferrous metal pipe in the winding frame, the guide pressing pipe body being in contact with the section of the nonferrous metal pipe falling into the winding frame from the pre-bending machine; the inner guardrail and the outer guardrail are collapsible guardrails. The arrangement mode of the pressing pipe bodies can be regularly arranged or irregularly arranged, and the structure is simple under the condition that the arrangement mode of the embodiment can meet the process requirements; the guardrail adopts a collapsible structure, so that the coiled pipe is convenient to take out.

The invention also provides a hard scattered disc winding machine set of nonferrous metal tubes comprising the hard scattered disc winding head, which sequentially comprises an uncoiler, a cleaning device, a straightening feeder, a flaw detection marking device and a drying device; after the nonferrous metal pipe is discharged from the uncoiler and passes through the cleaning device, the nonferrous metal pipe is fed into the pre-bending machine of the winding head according to any scheme by the straightening feeder through the flaw detection marking device and the drying device, and the pre-bending machine continuously feeds the nonferrous metal pipe into the winding frame of the winding head to realize continuous winding.

Preferably, the winding frame chassis lifting device and the guardrail lifting device are fixed on the winding head supporting leg through cylindrical sliding guide rail cantilevers, the winding frame is wound by one layer each time the winding frame chassis lifting device descends by one pipe diameter, each time a coil pipe is wound, the guardrail lifting device descends once, and the wound pipe can be unloaded and taken out.

The hard scattered disc winding head can be adopted to construct a hard scattered disc winding unit according to the process requirements to complete high-speed hard scattered disc winding of nonferrous metal pipes, and the scattered disc coil is manufactured. The supporting structure of the winding head selects the cantilever support of a single leg, the guardrail lifting device and the winding frame chassis lifting device are guided to move up and down by the cylindrical sliding guide rail arranged on the supporting leg of the winding head, and the supporting structure can also be designed into a bidirectional support, a linear guide rail guide and the like.

The foregoing and/or additional aspects and advantages of the present invention will become apparent and may be learned by practice of the embodiments as set forth hereinafter.

Drawings

FIG. 1 is a schematic cross-sectional view of one embodiment of a winding head according to the present invention;

FIG. 2 is a schematic view of a partial cross-sectional structure of a winding frame in the winding head shown in FIG. 1;

FIG. 3 is a schematic top view of the winding head of FIG. 1;

FIG. 4 is an enlarged partial schematic view of a crimp assembly of the winding head of FIG. 1 with the pilot crimp body omitted;

FIG. 5 is a schematic view of a flat cable wound around the winding head of FIG. 1 from the inside to the outside;

FIG. 6 is a schematic top view of FIG. 5 with the pilot press tube and pre-bender omitted;

FIG. 7 is a schematic view of a flat cable wound around the winding head of FIG. 1 from the outside to the inside;

FIG. 8 is a schematic top view of FIG. 7 with the pilot press tube and pre-bender omitted;

FIG. 9 is a schematic diagram of a hard disk winding unit according to an embodiment of the present invention;

FIG. 10 is a schematic top view of the hard disk winding unit of FIG. 9;

fig. 11 is a schematic view of a bulk copper coil wound according to the method of the present invention.

The correspondence between the reference numerals and the component names in fig. 1 to 11 is:

1. the device comprises a pre-bending machine, a winding frame, a pressing pipe assembly, a winding frame chassis lifting device, a winding power device and a transverse moving device, wherein the pre-bending machine is provided with the winding frame chassis lifting device, the winding power device is provided with the winding power device, and the transverse moving device is provided with the winding power device;

11. A third roller including a driving and reversing mechanism 12, a feeding roller 13, a first roller 14, a second roller 15;

21. the inner guardrail, 22, the outer guardrail, 23, the winding frame chassis, 24, the opening, 25, the guardrail lifting device, 26 and the winding frame central axis;

31. the pipe pressing body 311, the horizontal pipe pressing body 312, the guiding pipe pressing body 32, the bracket 33, the upright rod 34 and the counterweight;

101. uncoiler 102, cleaning device 103, straightening feeder 104, flaw detection marking device 105, drying device 106, cylindrical sliding guide rail 107 and winding head supporting leg;

400. the section of pipe falling into the process of winding the frame from the outlet of the pre-bending machine, 500, the circle of pipe being wound, 600, the layer of pipe being wound, 700 and the wound pipe;

Detailed Description

In order that the above objects, features and advantages of the invention may be more clearly understood, a description of specific embodiments according to the invention will be given below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.

In one aspect, the invention provides an embodiment of a hard bulk disc winding method for nonferrous metal tubes: feeding the nonferrous metal tube into a winding frame by a pre-bending machine under a hard state to perform bulk disc winding, and performing radial limit and height direction limit perpendicular to the radial direction on the nonferrous metal tube in the bulk disc winding process;

the radial limit comprises: for a tube being wound: limiting the radial inner side of the innermost tube of the layer of tubes being wound when the tubes are wound from inside to outside, and limiting the radial outer side of the outermost tube of the layer of tubes being wound when the tubes are wound from outside to inside; and for already wound tubes: limiting the radially inner side of the innermost tube of each layer of tubes and limiting the radially outer side of the outermost tube of each layer of tubes;

the height direction limiting comprises: for the section of pipe falling into the winding frame from the pre-bending machine, limiting the height direction of the section of pipe and not limiting the height direction of the section of pipe radially; for both the pipe being wound and the pipe already wound: so that the upper side of the height direction is limited.

The hard bulk disc winding method of the nonferrous metal pipe can overcome the influence of centrifugal force caused by high-speed bulk disc winding and realize high-speed bulk disc winding. Namely, the hard scattered disc winding method of the invention enables the inner-most tube of the layer of tubes which are wound from inside to outside to limit the inner side in the radial direction, enables the outer-most tube of the layer of tubes which are wound from outside to inside to limit the outer side in the radial direction, and enables the inner-most tube and the outer-most tube which are wound with each layer of tubes to respectively realize the inner side limit in the radial direction and the outer side limit in the radial direction, thereby realizing effective radial limit of each layer of tubes; and the section of the pipe falling into the winding frame from the pre-bending machine realizes height direction limit without radial limit and the upper side limit of the height direction of the pipe which is being wound and the pipe which is already wound. The good limit ensures that the loose disc can overcome radial and height shaking generated by centrifugal force in the high-speed winding process, so that the high-speed winding of the loose disc becomes possible, and the high-speed hard loose disc winding of the nonferrous metal pipe can be realized. The applicant experiment proves that the internal thread copper pipe with phi of 7mm can be wound at the speed of 300-400m/min in a stable hard state.

Preferably, another embodiment of the above-described hard bulk disk winding method of nonferrous metal tubing of the present invention, for tubing being wound: controlling parameters of the winding curve to control the length and the seam of each circle of pipe, so that each circle of pipe of the layer of pipe which is being wound from inside to outside is evenly spread and wound on the outer ring of the inner circle pipe; so that each turn of the tube of the layer of tube being wound from outside to inside is evenly spread around the inner circumference of the outer tube thereof.

In the embodiment, parameters of a winding curve are controlled by spreading the loose discs, the length of each circle of pipes and the pipe seam between adjacent circles of pipes can be controlled, and the upper side limit of the layer of pipes which are being wound in the height direction is matched, so that each circle of pipes of the layer of pipes which are being wound can not be wound in a staggered circle and can only be wound round by round according to the requirement of the winding curve. The winding can produce the effect similar to closely-spaced winding, the winding is neat and compact, and the coil pipe quality is good.

Preferably, in still another embodiment of the hard bulk coil winding method for nonferrous metal tubes of the present invention, the radial limit is implemented by an inner side wall and an outer side wall of the winding frame, and the height limit is implemented by a tube pressing body located at an upper portion of the winding frame. The side wall of the winding frame is adopted to realize radial limit, the pipe pressing body is adopted to realize limit in the height direction, and the device is simple in structure, easy to realize and low in cost.

The invention also provides an embodiment of a coil production process of the nonferrous metal tube, which comprises the steps of carrying out bulk winding on the nonferrous metal tube by adopting the hard bulk winding method of the nonferrous metal tube in any embodiment to obtain a coil, and then annealing and internal purging the coil by adopting a roller hearth annealing furnace to obtain the coil of the nonferrous metal tube.

The process of winding the high-speed hard scattered disc and annealing the roller hearth annealing furnace is a brand new production process of nonferrous metal coil pipes, the winding of the high-speed hard scattered disc is the most critical ring of the whole process, the subsequent annealing of the roller hearth annealing furnace is relatively simple, the annealing of the roller hearth annealing furnace can have sufficient time for internal purging, and the electricity consumption of the annealing of the roller hearth annealing furnace is only 60% of that of the on-line annealing. The process of high-speed hard bulk coil winding and roller hearth annealing enables the production process of the bulk coil to be similar to the traditional close-packed winding production process, and compared with the production process of the existing bulk coil, the process has the advantages of high yield, good quality and low cost.

In a further aspect, the present invention provides an embodiment of a winding head for implementing the hard bulk disc winding method of nonferrous metal pipe according to any one of the above embodiments, as shown in fig. 1, the winding head includes a pre-bending machine 1, a winding frame 2, a pipe pressing assembly 3, a winding frame chassis lifting device 4, a winding power device 5 and a traversing device 6, wherein:

the pre-bending machine 1 comprises a driving and reversing mechanism 11, the nonferrous metal pipe is sent to the upper part of the winding frame 2 after passing through the pre-bending machine 1, and the driving and reversing of the driving and reversing mechanism 11 can control the winding curve of the nonferrous metal pipe;

the winding frame 2 comprises an inner side wall, an outer side wall and a winding frame chassis 23 which can move up and down relative to the inner side wall and the outer side wall, the inner side wall, the outer side wall and the winding frame chassis 23 can synchronously rotate around a central axis 26 of the winding frame 2, the upper end of the winding frame 2 is provided with an opening 24 and is positioned below an outlet of the pre-bending machine 1, and the nonferrous metal pipe can fall into the opening 24 after passing through the pre-bending machine 1;

the pipe pressing assembly 3 comprises a plurality of pipe pressing bodies 31, wherein the pipe pressing bodies 31 are positioned at the opening 24 of the winding frame and can be contacted with the nonferrous metal pipe from the upper part;

The winding frame chassis lifting device 4 can drive the winding frame chassis 23 to move up and down along the central axis 26 of the winding frame 2 relative to the inner side wall and the outer side wall;

the winding power device 5 can drive the inner side wall, the outer side wall and the winding frame chassis 23 to synchronously rotate around the central axis 26 of the winding frame 2;

the traversing device 6 can drive the winding frame 2 or the pre-bending machine 1 to do reciprocating traversing motion along the direction vertical to the winding center line.

Preferably, another embodiment of the hard-state bulk-disc winding head for nonferrous metal tubes according to the present invention, as shown in fig. 3, the pre-bender 1 further comprises a feeding roller 12 and a pre-bending roller, the pre-bending roller comprises a first roller 13, a second roller 14 and a third roller 15, the feeding roller 12, the first roller 13, the second roller 14 and the third roller 15 are sequentially arranged, wherein:

the feeding roller 12, the first roller 13 and the second roller 14 are driving rollers, the winding speed and the feeding length of the nonferrous metal tube are controlled, and the third roller 15 is a driven roller;

the advancing and retreating mechanism 11 is connected to the third roller 15, and controls the feeding and/or retreating of the third roller 15 to control the winding curve of the nonferrous metal pipe.

In the embodiment, the third roller controlled by the feeding roller, the first roller and the second roller matched with the feeding and retreating mechanism in the pre-bending machine can jointly control the winding curve of the high-speed loose coil winding, so that the layer-changing winding and the close-packed-like flat loose coil winding are jointly realized with the winding frame chassis lifting device and the traversing device, and the coiled pipe after winding is regular and good in use.

Preferably, in a further embodiment of the hard bulk disc winding head for nonferrous metal pipes according to the present invention, as shown in fig. 1 and 2, the winding frame 2 further includes a guard rail lifting device 25, the inner side wall of the winding frame 2 is an inner guard rail 21, and the outer side wall of the winding frame 2 is an outer guard rail 22, and the guard rail lifting device 25 can drive the inner guard rail 21 and the outer guard rail 22 to do synchronous lifting motion along the central axis 26 of the winding frame. In the embodiment, the inner side wall and the outer side wall of the winding frame are designed into guardrails, so that the weight of the winding frame can be reduced, the materials can be saved, and the winding condition in the winding frame can be observed; the guardrail lifting device is used for controlling the lifting of the guardrail, so that the coiled pipe can be conveniently taken out after winding is completed.

Preferably, in still another embodiment of the hard state bulk disc winding head for nonferrous metal pipe of the present invention, as shown in fig. 4, the pipe pressing assembly 3 further includes a bracket 32, a vertical rod 33, and a counterweight 34, the vertical rod 33 is vertically movably mounted on the bracket 32, the upper end of the vertical rod 33 is fixedly connected with the pipe pressing body 31 through the counterweight 34 and the lower end of the vertical rod 33, the counterweight 34 applies downward pressure to the pipe pressing body 31 in the height direction through the vertical rod 33, and the bracket 32 is mounted on the guardrail lifting device 25 and can perform synchronous lifting movement with the inner guardrail 21 and the outer guardrail 22. The arrangement mode of the pressing pipe body is various, the movable limiting structure of the pressing pipe body is also various, and the arrangement mode and the structure of the embodiment are adopted, so that the pressing pipe is simple in structure and low in cost under the condition of realizing the technological requirements.

Preferably, in still another embodiment of the hard-state dispersion disc winding head for non-ferrous metal pipe according to the present invention, as shown in fig. 3, the tube pressing body 31 includes a plurality of horizontal tube pressing bodies 311 located at the same height and radially circumferentially arranged in the winding frame 2, and a guiding tube pressing body 312 located radially between the outlet of the pre-bender 1 and the upper end of the winding frame 2, wherein the plurality of horizontal tube pressing bodies 311 are in contact with the non-ferrous metal pipe at the uppermost layer in the winding frame 2, and the guiding tube pressing bodies 312 are in contact with the non-ferrous metal pipe 400 falling from the pre-bender 1 into the winding frame 2; the inner rail 21 and the outer rail 22 are collapsible rails. The arrangement modes of the pipe pressing bodies 31 are various, for example, the horizontal pipe pressing bodies 311 can be regularly arranged or irregularly arranged, the guide pipe pressing bodies 312 can be the upper side limit of one pair of pipes 400 or the upper side and the lower side limit of two pairs of pipes 400, and the arrangement mode of the embodiment has simple structure under the condition of realizing the process requirement; the guardrail adopts a collapsible structure, so that the coiled pipe is convenient to take out.

In a further aspect, the present invention provides an embodiment of a hard bulk disc winding unit for nonferrous metal tubes, which includes the hard bulk disc winding head, as shown in fig. 9 and 10, and includes an uncoiler 101, a cleaning device 102, a straightening feeder 103, a flaw detection marking device 104 and a drying device 105 in sequence; after the nonferrous metal pipe is discharged from the uncoiler 101 and passes through the cleaning device 102, the nonferrous metal pipe is fed into the pre-bending machine 1 of the winding head according to any one of the above embodiments by the straightening feeder 103 through the flaw detection marking device 104 and the drying device 105, and the nonferrous metal pipe is continuously fed into the winding frame 2 of the winding head by the pre-bending machine 1, so that continuous winding is realized.

In another embodiment of the hard bulk disc winding unit for nonferrous metal pipes, preferably, the winding frame 2, the winding frame chassis lifting device 4 and the guardrail lifting device 25 are fixed on the winding head supporting leg 107 in a cantilever manner through the cylindrical sliding guide rail 106, each layer of winding frame 2 is wound on the winding frame chassis lifting device 4 to descend by one pipe diameter, each time a disc of pipe is wound, the guardrail lifting device 25 descends once, and the wound pipe can be discharged and taken out.

In particular, it can be seen from FIGS. 9-10 that the tube runs in the direction of arrow D, R-R being the winding centerline, which is stationary during the winding process. The pipe is fed from the uncoiling machine 101 into the pre-bender 1 by a straightening feeder 103, and passes through a cleaning device 102, a flaw detection marking device 104 and a drying device 105. The pre-bender 1 continuously feeds the tube into the winding frame 2, and the winding frame 2 rotates in the direction of n to continuously wind the tube. The winding frame 2, the winding frame chassis lifting device 4 and the guardrail lifting device 25 are fixed on the winding head supporting legs 107 in a cantilever manner through the cylindrical guide rails 106, and the winding frame chassis lifting device 4 is driven to move up and down through a servo motor and a ball screw, so that the winding frame 2 is wound with one layer of loose disc winding frame chassis lifting device 4 to descend by one pipe diameter. The guardrail lifting device 25 descends once every time a coil of pipe is wound, and the wound pipe is discharged and taken out from the direction of arrow C.

The above embodiment of the present invention selects the cantilever support of the single leg, the guardrail lifting device 25 and the winding frame chassis lifting device 4 are guided by the cylindrical sliding guide rail 106 mounted on the supporting leg 107 of the winding head to move up and down, and the support structure can be designed as a bidirectional support, a linear guide rail guide or the like.

The above figures 1-10 only show specific examples of the winding head and winding unit according to the invention, and many different combinations of designs can be provided under the guidance of the method and principles of the invention to meet the needs of actual production and different users, wherein

The embodiment of the invention designs the inner guardrail 21 capable of expanding and contracting radially and the outer guardrail 22 capable of expanding and contracting radially for the winding frame 2, wherein the design of the inner guardrail and the outer guardrail is used for limiting the scattered copper pipe to shake at a radial high speed due to centrifugal force during high-speed winding, the expandable guardrail is used for facilitating discharging, the inner guardrail is expanded and the outer guardrail is contracted during winding, the pipe is limited by the inner guardrail and the outer guardrail in the radial direction during discharging, and the pipe can be conveniently discharged after being released from the pipe. The embodiment of the invention adopts the steel upright post form of the inner ring and the outer ring to form the guard rail, and the 6 upright posts of the inner guard rail and the 8 upright posts of the outer guard rail can be seen from fig. 6 and 8. The upright post is parallel to the central line of the winding frame 2, and the guardrail is expanded and contracted in an eccentric shaft rotation mode. The steel upright post needs hard chromium plating and polishing on the outer surface. The guardrail upright post can also be made into soft materials to be contacted with nonferrous metal pipes, such as rubber pipes, plastic pipes and the like sleeved on the steel column; the guard rail can also be made into a closed structure, and the expanding and contracting mechanism can adopt a wedge mechanism, a connecting rod mechanism or a linkage structure similar to a shutter, and the like, and the guard rail plates are simultaneously expanded or contracted by a rotating mechanism in the circumferential direction.

In the above embodiment of the present invention, the pressing pipe assembly 3 is installed above the winding frame 2 through the bracket 32, and the upright rod 33 is installed on the guardrail lifting device 25 together with the winding frame 2. The press tube assembly 3 is pressed into contact with the tubes 400, 500 and 600 by a set of press tube bodies 31 arranged in the circumferential direction and limits them in the height direction when being wound. At the end of winding, the press tube 31 is lifted up and withdrawn from the work station. The cylinder and the rotary cylinder can perform the movement of the pressing pipe body 31. Each pressing pipe body 31 can independently execute the actions by a group of air valves of the respective air cylinders, and all the pressing pipe bodies 31 can be installed on a bracket to form a structure similar to a pot cover to be buckled on the winding frame 2, and a set of air channels control the pressing, lifting and advancing and retreating of all the pressing pipe bodies.

The press pipe body 31 is very important, and it is in direct contact with the pipe, as to whether or not stable nearly close-packed winding can be achieved. The horizontal pressing pipe body 311 is in contact with the layer of the pipe 500 and 600 being wound during the course of winding the loose disc, and the 311 forces the pipe 500 and 600 from top to bottom to limit them in the height direction. The force application mode can be a heavy hammer weight mode or a spring or cylinder pressing mode. The amount of compression of the spring and the pressure of the cylinder can be adjusted to change the amount of force. Because the coiled pipe 700 is arranged below the pipes 500 and 600, the horizontal pressure pipe body 311 is limited in a height direction to be capable of moving up and down to avoid crushing the pipe, and the horizontal pressure pipe body 311 can be jacked up when the layer of the coiled pipe 600 is uneven, so that the pipe is not crushed. The guide press body 312 is in contact with the length of the tube 400 falling from the pre-bending machine 1 into the winding frame 2, and there may be more than one guide press body 312 because the length of the tube is suspended. The guide pressing pipe body 312 may limit the pipe 400 only in the height direction, or may limit the pipe vertically at the same time. The limitation of the pipe 400 in height can be the limitation that the height direction can move up and down, or the limitation that the height direction is unchanged, the limitation of the guiding pipe pressing body 312 to the pipe 400 is the limitation in the height direction only, the radial limitation cannot be realized, and any radial influence on the section of pipe 400 is likely to interfere with the winding curve of the scattered disc, so that the flat cable is influenced.

For convenience of description, the pressing pipe body 31 is drawn into a single slender steel bar structure in the drawings of the present invention, and the pressing pipe body can be designed into many other structures. The tube pressing body can be designed into a vertical tube pressing plate structure, and the contact edge of the tube pressing plate and the copper tube is subjected to smooth processing, hardening and polishing. One press tube body may have more than one plate bar in contact with the nonferrous metal tube. The tube pressing body can be designed into a rotatable roller structure, when a single roller penetrates into the winding frame 2 in the height direction, the support at the two ends of the roller is ensured not to collide with the inner guardrail and the outer guardrail, and the support at the two ends of the roller can be higher than the top ends of the inner guardrail 21 and the outer guardrail 22. The diameter of the rotating roller is preferably too large, the weight of the large-diameter rotating roller is large, and the thin-wall nonferrous metal tube can possibly rotate with the rotating roller. More than one rotating roller can be designed at one pipe pressing body, for example, two rotating rollers which are intersected in the radial direction are respectively responsible for limiting the layer pipe 600 which is being wound and is of an inner layer and an outer layer, and the support of the rotating rollers can be designed into a single-support cantilever structure or other structures. The rotating roller may be made into a cone roller structure, but the contact surface of the cone roller and the pipe 600 is still in horizontal contact, the axis of the cone roller forms a certain angle with the horizontal surface, two groups of cone rollers are needed from inside to outside or from outside to inside, and the cone rollers can be passively rotated to enable the pipes 500 and 600 to be tightly attached to the inner diameter or the outer diameter. The same pipe pressing body can be selected by one winding head, the pipe pressing bodies in several forms can be also provided, and the pipe pressing bodies in different positions can be provided with different forms according to different functions. The pressing pipe body can be made of hard nylon, plastic and other materials, but the materials are replaced frequently. The steel rod rolled pipe body is hard, hard chromium is quenched or plated, and hard alloy rod can be used. The surface in contact with the tubing is polished. The pipe pressing body 31 with the bright surface can ensure that the pipe pressing body 31 can not influence the pipe to wind according to a winding curve when contacting with the pipe, and the bright contact surface can also avoid the scratch of the pipe. For the force application mode of the pressure pipe body, the embodiment of the invention adopts a heavy hammer structure, and can also adopt the force application mode of air cylinder or spring force, and the pneumatic pressure regulating valve or the proportional valve can adjust the force application.

In the above embodiment of the present invention, the pre-bender 1 is provided with a feed roller and a pre-bending roller, and three rollers for pre-bending are provided, such as a first roller 13, a second roller 14 and a third roller 15 in fig. 3. The feed roller 12, the first roller 13, and the second roller 14 are driving rollers, and the third roller 15 is a pre-roll and is a driven roller. The pre-bending machine is provided with a driving unit for driving the feeding roller, the first roller and the second roller to rotate, controlling the winding speed and the feeding length, and continuously feeding the wound nonferrous metal tube into the winding frame. The pre-bending machine is also provided with a third roller advancing and retreating mechanism 11, and the mechanism is generally driven by a servo motor and a speed reducer to drive a ball screw to control the feeding and/or retreating of the third roller 15. The winding curve of the loose disc winding is completed by the mechanism and the feeding roller of the pre-bending machine.

With respect to the winding curve, archimedes' spiral is a suitable choice. The diameter of the tube increases or decreases uniformly by one pitch per revolution of the curve by phase angle. For better winding, certain local modifications can be made to the archimedes spiral. For example, the feeding amount or the retraction amount of the third roller 15 can be appropriately increased or decreased in consideration of the rebound effect of the hard tube when the innermost or outermost roller is layered. It is also possible to design special curves, such as feeding and/or retracting the third roller 15 in a specific phase region, the remaining regions being achieved with the third roller 15 stationary, etc.

In the embodiment of the invention, as shown in fig. 10, the pre-bending machine 1 does not move transversely in the winding process, the central line of the pre-bending roller of the pre-bending machine 1 always coincides with the central line R-R of the winding unit, and the pipe goes straight in and straight out. To complete the arrangement of the archimedes' spiral of the tube, the winding frame 2 needs to be reciprocally and laterally moved in the direction L by the driving of the traversing device 6. In yet another solution, the pre-bender 1 drives the tube to reciprocate transversely in the direction L during winding, and the winding frame 2 does not move transversely. The pipe in this scheme has a section of bent pipe before falling into the winding frame 2, and a certain length distance is needed between the pre-bending machine and equipment in front of the pre-bending machine, otherwise, the pipe is easy to generate short-distance bent pipe deformation, and the winding of a loose disc and the quality of the pipe are affected.

In the above embodiment of the present invention, 25 is a guardrail lifting device, and the motor and the speed reducer can drive the screw rod to complete the up-and-down movement of the inner and outer guardrails. The fence elevating gear 25 rises to the working position when winding, see the position in fig. 1, after the winding is completed, the guardrail elevating gear 25 falls to the unloading position, so that the top surfaces of the inner and outer guardrails are lower than the bottom layer of the wound scattered coil pipe, and the forklift can shovel away the scattered coil pipe to finish unloading.

In the above embodiment of the present invention, 6 is a traversing device, in order to ensure the winding of the archimedes spiral, the winding frame 2 needs to make a traversing movement in a direction perpendicular to the winding center line R-R, and the traversing of the winding frame 2 can be controlled by a servo motor and a ball screw, and each winding is traversed by one pipe diameter, and the traversing direction is as shown by an arrow L in fig. 10.

In the above embodiment of the present invention, 4 is a lifting device for a chassis of a winding frame, and may be used to lift a loose coil 700 wound in the winding frame 2. When winding starts, the winding frame chassis lifting device 4 is arranged at the highest position, and each layer of winding frame chassis lifting device 4 drives the winding frame chassis 23 to descend by one pipe diameter until the winding of the whole pipe is completed. The accuracy of the lowering of the winding frame base lifting device 4 is very important, and it determines the contact position of the pressing pipe body 31 with the upper surface of the layer of pipe 600 being wound in the height direction, and also determines whether the flat cable can be dense. Although the press pipe body 31 is in movable contact with the layer of the pipe 600 being wound up, this amount of activity is not likely to be too great. In practice, a program set by a computer is adopted to ensure the descending amount after each layer is wound, and an auxiliary photoelectric sensor is used to monitor the position of the upper surface of the layer of the pipe 600 being wound in real time, so that once deviation is found, deviation correction can be timely carried out, and normal and continuous winding is ensured.

The following describes in detail the implementation of the winding method according to the invention with the winding head according to the above-described embodiment, in order to provide a further understanding of the winding method and the winding head according to the invention:

as shown in fig. 2, the present invention designates the length of pipe falling from the pre-bender into the winding frame as 400, the winding round as 500, the winding round as 600, and the already wound loose pipe as 700. The winding frame 2 of the invention is simultaneously designed with an expandable inner guardrail 21 and an expandable outer guardrail 22, and the purpose of the winding frame is to radially limit the high-speed shaking of the loose coil pipe generated by high-speed winding centrifugal force. The inner rail 21 is placed in the open position and the outer rail 22 is placed in the contracted position at the start of winding, while the winding frame chassis 23 is lifted to the highest position by the winding frame chassis lifting device 4. As shown in fig. 2 and 3, the tube enters the pre-bender 1 in the direction of arrow M during winding, and the direction of rotation of the winding frame 2 is in the direction of arrow n. The feeding roller and the pre-bending roller on the pre-bending machine 1 continuously feed the pipe into the winding frame 2 according to the pre-bending forming of the winding curve, and the pipe is wound in a layer-by-layer and flat way. After winding a layer, the winding frame chassis lifting device 4 drives the winding frame chassis 23 to descend by one pipe diameter. The advancing and retreating mechanism 11 on the pre-bender 1 is continuously advanced and/or retreated in the direction H in fig. 3, and the corresponding layer of the pipe 600 being wound is wound from the outer ring to the inner ring, and is wound from the inner ring to the outer ring after the layer is changed. The wrapping is a continuous back and forth flat wrapping of layers, with the inner and outer rails 21 and 22 providing radial restraint to the wrapped loose coil 700, which is a restraint over the entire height of the wrap frame 2.

The present invention also provides a pressing pipe assembly 3, which is designed to limit the runout of the pipes 400, 500 and 600 in the height direction due to the centrifugal force during high-speed winding, and to enable the loose coil winding of the present invention to achieve nearly close-packed winding. Fig. 4 is an enlarged view of a tube pressing assembly portion of an embodiment, the tube pressing assembly including a bracket 32, a vertical rod 33, a counterweight 34, and a tube pressing body 31 (for convenience of description, the tube pressing body 31 in the drawing is indicated by a thick solid line indicating a thin rod). Wherein the bracket 32 is mounted on the rail elevating device 25 together with the inner and outer rails 21 and 22 of the winding frame 2, see fig. 2 and 3, and the other components of the pressure tube assembly 3 are mounted on the bracket 32. The pressing body 31 is vertically movably supported on the support 32 by the vertical rods 33 so that the pressing body 31 is in contact with the layer of the pipe 600 being wound, the ring of the pipe 500 being wound, and the length of the pipe 400 falling from the pre-bending machine into the winding frame. The weight 34 is a weight having a certain weight, and can ensure that the pressing pipe body 31 always maintains a certain pressing force to the upper sides of the pipes 400, 500 and 600 when being wound. The pressing pipe assembly 3 and the winding frame 2 move transversely together and the relative position is kept unchanged during winding.

It can also be seen from fig. 3 that 6 press bodies 31 simultaneously apply forces to the tubes 400, 500 and 600 in contact on the circumference of the winding frame, spacing them in the height direction over the entire circumference. Wherein 1 guiding press pipe body 312 is in contact limit with pipe 400, and 5 horizontal press pipe bodies 311 are in contact limit with pipes 500 and 600. The limit of the horizontal pressure pipe body 311 must not be a fixed dead limit, but a limit movable in the height direction. The horizontal pressing pipe body 311 can move up and down in the direction of arrow K in fig. 4 when contacting the pipe. The layer of pipe 600 being wound is not too flat when the loose disc is wound, and the design can ensure that the horizontal pressing pipe body 311 is always contacted with the limited pipe 600 in the height direction. The present invention also requires that the crimp body 31 be made of a hard material, that is, the contact surface of the crimp body 31 itself is not deformed due to dimensional change when the crimp body 31 is in contact with the pipes 400, 500 and 600. The contact surface between the pressing pipe body 31 and the pipe is hard, the finish is good, and the friction coefficient is low. This requirement allows the suspended tube 400 to be limited only in the height direction and not to be disturbed by the radial direction due to deformation of the material, so that the tube 400 can be dropped into the winding frame 2 at the correct position according to the set winding curve, and the tubes 500 and 600 can be wound at the correct positions. .

Fig. 5 is a schematic view of the flat cable of the present invention when winding from inside to outside, and fig. 6 is a plan view thereof, by which the principle of the flat cable of the present invention which is approximately closely wound can be explained.

As shown in fig. 5 and 6, the layer of tubing 600 being wound is numbered a1, a 2..an, an+1..where an is the ring of tubing 500 being wound and an+1 is the next ring of tubing being wound, in order from the innermost ring to the outer ring. The tube is restrained up and down, and the press tube body 31 is restrained from upward movement by contact with a1, a 2..an, an+1 from above, and the wrapped tube 700 is restrained from downward. The winding of the tube 600 from inside to outside can be completed by controlling the tube feeding length and the amount of retreating of the advancing and retreating mechanism 11, and the gap t1 between the innermost ring a1 and the inner fence 21 can be controlled to a relatively small value so that the innermost ring tube of the layer of the tube 600 being wound is brought close to the inner fence 21 of the winding frame 2. When the bulk coil winding follows an archimedes spiral winding, the tube winding from inside to outside increases radially one pitch around the tube winding. So t1 is theoretically not a constant value on the whole circumference, but controlling t1 to be smaller means that the tube a1 of the innermost ring can be effectively limited by the inner guard rail 21 on the whole circumference in the radial direction, which means that the centering of a1 and the winding frame 2 is good, the radial distance of a1 which can shake is small, and the shock of shaking is small. For example, t1 is between 0 and 20mm and the wobble is much smaller than that generated when t1 is more than 50 mm.

Since t1 is relatively small, for example, in one test by the applicant, it is limited to between 0 and 5mm (t 1 being 0 means that the innermost tube is in partial circumferential contact with the inner rail 21), a1 is limited in the radial circumferential direction by the inner rail 21 by a small amount of effective limited sloshing. While a1 is also limited in both the up and down directions. The restriction of the upper, lower and inner sides enables a1 falling into the winding frame 2 to overcome the influence of centrifugal force during high-speed winding, so that the winding cannot be rocked. a2 of the next turn of a1 is limited in both the up and down directions, a2 is limited by a1 in the whole inner circumferential direction, and a1 transmits the limitation of the inner guardrail 21 to a2 in the radial circumferential direction of a1 itself. The pitch of the winding curve can be controlled to control the seam of two circles of pipes to be a smaller value, for example, the seam is smaller than 0.5mm, meanwhile, the winding curve parameter is controlled to control the length of the circle of pipes of a2, at the moment, the length of the winding curve is limited by the height direction, the circumference radial direction of the inner ring and the length of the winding curve and 4 factors of the seam, a2 can be wound and arranged in order according to the same winding curve just outside a1 as a1, and no other position of a2 can fall. The arranged a2 is the same as the a1, the upper and lower internal three sides are limited, the influence of centrifugal force during high-speed winding can be overcome, and the shaking which influences the winding can not be generated.

By analogy a3, a4 to an-1, an are limited by the pipe body 31 and the lower layer pipe in the height direction, and by analogy a2, a4 by a3, an by an-1, each circle of pipe is limited by the whole circumference of the inner circle pipe in the radial direction, each circle of pipe follows the winding rule of the winding curve and the pipe seam is the same, the next circle of pipe of an is arranged at an+1, the pipe is arranged at the outer circle a of an+1 in the solid pipe of fig. 5, and therefore, the staggered winding is impossible. The winding curve limits the length of an+1 turns and the seam between two adjacent turns, an+1 being uniformly arranged on an adjacent outer turn. Therefore, each circle of the pipe 600 of the pipe being wound is limited in three directions in the upper and lower directions, and the winding curve is added to set the length and the pipe seam of each circle, so that the round of the pipe 600 being wound can be wound by high-speed loose discs which are approximately closely arranged in a stable state, and the wound pipe in the pipe 600 cannot shake to influence the winding.

As can be seen from fig. 6, the 5 pressing pipes 31 are radially arranged in the circumferential direction of the winding frame 2, and for drawing convenience, concentric circles are used to replace winding curves, and the pressing pipes 31 may be uniformly distributed or may be arranged according to specific working positions. The 6 inner guardrails 21 limit the sway of the dispersion disk tube at the inner ring, and the tube wound from the inner ring to the outer ring is thickened to show that the tube is limited by the inner guardrails 21.

Fig. 7 is a schematic view of the flat cable of the present invention when winding from outside to inside, and fig. 8 is a top view of fig. 7. b1 represents the outermost tube of the layers of tubes being wound and t2 is the distance between it and the outer barrier 22. By controlling the tube feeding length and the feeding amount of the feeding and retracting mechanism 11 to control t2 to a relatively small value, for example, 0 to 5mm, the outermost circumference of the layer of the tube 600 being wound can be brought close to the outer fence 22 of the winding frame, and the gap between the tubes 600 can be controlled to be small. The outer barrier 22 effectively limits the outer-most tube b1 radially outward over its entire circumference and any one of the tubes bn in the layer 600 being wound limits the inner-most tube bn +1 radially outward over its entire circumference. The pipe pressing body 31 and the wound lower layer pipe are limited in the height direction, the layer pipe 600 which is being wound from outside to inside is limited in the upper and lower outer directions, and the winding curve is added to control the length and the seam of each circle of pipe, so that the next circle of pipe of bn can be determined to be uniformly arranged at the bn+1 position, and the next circle of pipe cannot be arranged at the inner ring b of bn+1 position. The layer of copper pipe 600 being wound can be wound by the approximately densely distributed scattering disks from outside to inside in a stable state, and the wound pipe in the copper pipe 600 cannot shake to influence the winding.

The winding of the loose disc is flat-spread winding layer by layer from inside to outside and from outside to inside, and the winding order of the whole loose disc can be ensured as long as each circle of pipe is controlled to fall into the winding frame 2 at the correct position under the stable state and each circle of pipe is controlled not to fall into the winding frame 2 without generating mess layers. The inner and outer guardrails 21 and 22 can provide stable radial limit of the whole circumference of the whole coiled pipe 700, and the gravity pressing of the coiled pipe of the upper layer and the transmission of the height-direction limiting acting force transferred from the upper layer to the lower layer of the pipe pressing body 31 can limit the coiled pipe 700 stably in the height direction. The effective limit of radial and height direction can limit the vibration of the pipe due to centrifugal force in the high-speed winding working condition within the range which does not affect the winding, so that the high-speed hard scattered disk is wound to be implemented, the winding quality similar to closely arranged winding can be achieved by winding the high-speed hard scattered disk, as shown in fig. 11, the wound lower scattered disk pipe can not generate tube collapse and tube disorder under the working condition of high-speed rotation, and the coil quality is good.

The following is a comparison of the data of the applicant's test data on the internally threaded copper tube, as shown in table 1 below:

The data of table 1 were obtained on two test benches. Test nos. 1-4 are the results obtained on test stand one and test nos. 5-8 are the results obtained on test stand two. All test copper tubes were hard tubes of phi 7 mm. The inner and outer guardrails of the winding frame of the test bed I are in a circumferential shutter form, a rubber plate with the thickness of 10mm contacts with the inner and outer rings of the scattered disc copper pipe during winding, and the shutter plate is rotated to complete expansion and contraction of the inner and outer guardrails. The problem with such guardrails is that the rubber plate is easily damaged. The second test bed is a steel upright column type guardrail, and the linked eccentric shaft structure completes expansion and contraction of the inner guardrail and the outer guardrail.

TABLE 1

Test No. 1-2 is a comparative example, the tube body is not pressed, t1, t2 and the tube seam are all large, and the winding speed and the winding quality are poor. Test No. 3-8 increases the limit of the pressing pipe body in the aspect of height, increases the control of the winding curve, reduces t1, t2 and the pipe seam, and can obviously improve the winding speed and the quality.

The test number 4 has t1 and t2 of 0, the soft rubber plate can be stuck to the innermost ring or the outermost ring of the copper pipe, the rubber plate is compressed and contracted, and the t1 and t2 can even be negative values. Test numbers 6-8 the archimedes spiral was modified to some extent. When the flexible pipe is wound with the flexible pipe loose disc, certain rebound effect exists when the flexible pipe loose disc is wound with different rigid pipe loose discs, and the outermost pipe is stuck to the outer guardrail and needs to be compensated; how to find accurate reversing points, stopping amounts before and after the reversing points and the like when the outermost ring or the innermost ring is used for reversing layers, and the problems are all to actually modify theoretical curves.

As can be seen from the test data in Table 1, the production of bulk copper tubes according to the method of the present invention achieves good results. Firstly, the product quality is good, compared with soft state bulk disc winding, the bulk disc winding is tidy, and the key is that the cleanliness of the inner wall can meet the requirements of an air conditioner main machine factory; secondly, the yield of the equipment is satisfactory, the winding head can be added after the existing close-packed winding machine to perform bulk disc winding, the normal winding speed is generally more than 300m/min, the same yield of close-packed winding is completely achieved, and one machine is dual-purpose. In addition, the hard bulk disc winding and roller hearth annealing process of the invention has entered normal production, and the production cost is saved by 200 yuan/ton compared with soft winding of bulk disc on-line annealing, which is a great cost saving for the modern factory which takes 50000 ton copper pipe as a production unit. The winding method, the coil production process and the winding equipment are verified to be feasible again, the defects of the prior art are overcome, and the aim of the invention is fulfilled.

In summary, the method for winding the hard bulk coil of the nonferrous metal pipe provided by the invention can overcome the influence of centrifugal force caused by high-speed bulk coil winding, realize high-speed hard bulk coil winding, ensure that bulk coil pipes obtained after winding are orderly arranged, realize coils similar to closely-spaced winding, and ensure the quality of the coils. The hard-state scattered coil winding method of the nonferrous metal coil provided by the invention is applied to the production of nonferrous metal coils, and the high-quality scattered coil similar to close-packed coil can be manufactured under the condition of ensuring the productivity. The hard-state bulk disc winding head of the nonferrous metal pipe provided by the invention can be used for implementing the hard-state bulk disc winding method of the nonferrous metal pipe. The hard scattered disc winding unit for the nonferrous metal pipe comprises the hard scattered disc winding head for the nonferrous metal pipe, and the production process of the nonferrous metal coil pipe provided by the invention can be implemented. Overcomes the defects of the prior art and realizes the aim of the invention of the patent.

In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or unit referred to must have a specific direction, be constructed and operated in a specific direction, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" refers to two or more, unless explicitly defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A hard scattered disc winding method for nonferrous metal tubes is characterized in that,

The radial limit comprises:

for a tube being wound: limiting the radial inner side of the innermost tube of the layer of tubes being wound when the tubes are wound from inside to outside, and limiting the radial outer side of the outermost tube of the layer of tubes being wound when the tubes are wound from outside to inside; and

for a tube that has been wound: limiting the radially inner side of the innermost tube of each layer of tubes and limiting the radially outer side of the outermost tube of each layer of tubes;

the height direction limiting comprises:

for the section of pipe falling into the winding frame from the pre-bending machine, limiting the height direction of the section of pipe and not limiting the height direction of the section of pipe radially; and

for both the pipe being wound and the pipe already wound: so that the upper side of the height direction is limited.

2. The method of hard bulk disc winding of nonferrous metal tubing of claim 1, wherein:

for a tube being wound: parameters of the winding curve are controlled to control the length of each turn of the tube and the seam between adjacent turns of the tube so that each turn of the tube of the layer of the tube being wound from the inside to the outside is evenly spread around the outer circumference of the tube of the inner turn of the tube, and each turn of the tube of the layer of the tube being wound from the outside to the inside is evenly spread around the inner circumference of the tube of the outer turn of the tube.

3. A method of hard bulk disc winding of nonferrous metal tubing according to claim 1 or 2, wherein:

radial limiting is realized by the inner side wall and the outer side wall of the winding frame, and height direction limiting is realized by a pipe pressing body positioned on the upper part of the winding frame.

4. A method of hard bulk disc winding of nonferrous metal tubing as claimed in claim 3 wherein: the height direction limit is an up-and-down movable limit.

5. A process for producing a coil pipe of a nonferrous metal pipe, which is characterized by comprising the steps of carrying out bulk winding on the nonferrous metal pipe by adopting the hard bulk winding method of the nonferrous metal pipe according to any one of claims 1-4, annealing and internally blowing the coil pipe by adopting a roller hearth annealing furnace after the coil pipe is obtained, so as to obtain the coil pipe of the nonferrous metal pipe.

6. A winding head for carrying out the method for winding hard bulk disks of nonferrous metal tubes according to any one of claims 1 to 4, characterized in that,

including pre-bending machine (1), winding frame (2), press pipe assembly (3), winding frame chassis elevating gear (4), winding power device (5) and sideslip device (6), wherein:

the pre-bending machine (1) comprises a feeding and retreating mechanism (11), the nonferrous metal pipe is fed into the upper part of the winding frame (2) after passing through the pre-bending machine (1), and the feeding and retreating of the feeding and retreating mechanism (11) can control the winding curve of the nonferrous metal pipe;

The winding frame (2) comprises an inner side wall, an outer side wall and a winding frame base plate (23) which can move up and down relative to the inner side wall and the outer side wall, the inner side wall, the outer side wall and the winding frame base plate (23) can synchronously rotate around a central axis (26) of the winding frame (2), an opening (24) is formed at the upper end of the winding frame (2) and is positioned below an outlet of the pre-bending machine (1), and the nonferrous metal pipe can fall into the opening (24) after passing through the pre-bending machine (1);

the pipe pressing assembly (3) comprises a plurality of pipe pressing bodies (31), wherein the pipe pressing bodies (31) are positioned at the opening (24) of the winding frame and can be contacted with the nonferrous metal pipe from the upper part in the height direction;

the winding frame chassis lifting device (4) can drive the winding frame chassis (23) to move up and down along a central axis (26) of the winding frame (2) relative to the inner side wall and the outer side wall;

the winding power device (5) can drive the inner side wall, the outer side wall and the winding frame chassis (23) to synchronously rotate around the central axis (26) of the winding frame (2);

the transverse moving device (6) can drive the winding frame (2) or the pre-bending machine (1) to do reciprocating transverse moving along the direction perpendicular to the winding center line.

7. The winding head according to claim 6, wherein:

The pre-bending machine (1) further comprises a feeding roller (12) and a pre-bending roller, the pre-bending roller comprises a first roller (13), a second roller (14) and a third roller (15), the feeding roller (12), the first roller (13), the second roller (14) and the third roller (15) are sequentially arranged, and the pre-bending machine comprises:

the feeding roller (12), the first roller (13) and the second roller (14) are driving rollers, the winding speed and the feeding length of the nonferrous metal tube are controlled, and the third roller (15) is a driven roller;

the advancing and retreating mechanism (11) is connected with the third roller (15) and controls the feeding and/or retreating of the third roller (15) so as to control the winding curve of the nonferrous metal pipe.

8. The winding head according to claim 7, wherein:

the winding frame (2) further comprises a guardrail lifting device (25), the inner side wall of the winding frame (2) is an inner guardrail (21) and the outer side wall is an outer guardrail (22), and the guardrail lifting device (25) can drive the inner guardrail (21) and the outer guardrail (22) to synchronously lift along a central axis (26) of the winding frame (2).

9. The winding head according to claim 8, wherein:

the pipe pressing assembly (3) further comprises a support (32), a vertical rod (33) and a counterweight (34), wherein the vertical rod (33) can be vertically arranged on the support (32) in an up-down movable mode, the upper end of the vertical rod (33) is fixedly connected with the counterweight (34) and the lower end of the vertical rod is fixedly connected with the pipe pressing body (31), the counterweight (34) applies downward pressure to the pipe pressing body (31) through the vertical rod (33), and the support (32) is arranged on the guardrail lifting device (25) and can synchronously lift and move with the inner guardrail (21) and the outer guardrail (22).

10. The winding head according to claim 9, characterized in that:

the pipe pressing bodies (31) comprise a plurality of horizontal pipe pressing bodies (311) which are positioned at the same height and are radially arranged in the winding frame (2) along the circumference, and guide pipe pressing bodies (312) which are radially arranged between the outlet of the pre-bending machine (1) and the upper end of the winding frame (2), wherein the plurality of horizontal pipe pressing bodies (311) are contacted with the non-ferrous metal pipes at the uppermost layer in the winding frame (2), and the guide pipe pressing bodies (312) are contacted with the non-ferrous metal pipes falling into the winding frame (2) from the pre-bending machine (1);

the inner guardrail (21) and the outer guardrail (22) are collapsible guardrails.

11. A hard scattered disc winding machine set for nonferrous metal pipes is characterized in that,

the device sequentially comprises an uncoiler (101), a cleaning device (102), a straightening feeder (103), a flaw detection marking device (104) and a drying device (105);

after the nonferrous metal pipe is discharged from the uncoiler (101) and passes through the cleaning device (102), the nonferrous metal pipe is conveyed into the pre-bending machine (1) of the winding head according to any one of claims 6-10 by the straightening feeder (103) through the flaw detection marking device (104) and the drying device (105), and the nonferrous metal pipe is continuously conveyed into the winding frame (2) of the winding head by the pre-bending machine (1) so as to realize continuous winding.

12. The hard bulk disc winding unit for nonferrous metal tubes according to claim 11, wherein,

winding frame (2) and winding frame chassis elevating gear (4) and guardrail elevating gear (25) are fixed on winding head supporting leg (107) through cylindrical sliding guide (106) cantilever, winding frame (2) every twine one deck winding frame chassis elevating gear (4) descends a pipe diameter, and every time a coil pipe has been twined, guardrail elevating gear (25) descends once, and the pipe that twines is unloaded and is taken out.