CN113385550B - Threaded pipe production process - Google Patents
Threaded pipe production process Download PDFInfo
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- CN113385550B CN113385550B CN202110735574.3A CN202110735574A CN113385550B CN 113385550 B CN113385550 B CN 113385550B CN 202110735574 A CN202110735574 A CN 202110735574A CN 113385550 B CN113385550 B CN 113385550B
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- ring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
- B21C1/22—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles
- B21C1/24—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles by means of mandrels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels
- B21C3/02—Dies; Selection of material therefor; Cleaning thereof
- B21C3/12—Die holders; Rotating dies
- B21C3/14—Die holders combined with devices for guiding the drawing material or combined with devices for cooling heating, or lubricating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/30—Finishing tubes, e.g. sizing, burnishing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C9/00—Cooling, heating or lubricating drawing material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/14—Spinning
- B21D22/16—Spinning over shaping mandrels or formers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/16—Heating or cooling
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Metal Extraction Processes (AREA)
Abstract
The invention relates to the technical field of metal pipe processing, and particularly discloses a threaded pipe production process, which needs threaded pipe production equipment, an inner core and traction equipment for traction of a pipe material, and comprises the following steps: step one, reducing the diameter of a pipe; the pipe is continuously dragged by the traction equipment to move forwards, when the pipe moves forwards between the moving stretching die and the moving core head, the moving core head continuously rotates, and the pipe is reduced under the rotation of the moving core head and the traction of the traction equipment; step two, thread forming; the pipe moves forward to a position between the spinning ring and the threaded core print of the inner core, and internal threads are formed on the inner wall of the pipe; in the process of forming the threads of the pipe, the spinning ring and the inner core are cooled, and the spinning ring is lubricated; step three, sizing the threaded pipe; the pipe passes through a sizing die to realize sizing. The scheme is used for solving the problems that a large amount of heat generated in spinning forming influences spinning forming quality and reduces the service life of the spinning ring and the inner core in the prior art.
Description
Technical Field
The invention relates to the technical field of metal pipe processing, in particular to a threaded pipe production process.
Background
The method comprises the following steps that internal threads are sometimes required to be machined on some metal tubes with soft texture, such as copper tubes and aluminum tubes, so that the heat dissipation effect or the heat conduction effect of the metal tubes is enhanced, the machined tubes with the internal threads are called threaded tubes, the threaded tubes are generally formed by spinning, a spinning ring and an inner core are required during spinning, a steel ball is arranged on the spinning ring, and when the spinning ring rotates, the steel ball not only rotates but also revolves; the inner core is fixedly provided with a thread core head and a moving core head, and when the spinning ring rotates, the inner core integrally rotates; in the spinning process, the inner core is positioned in the pipe, the pipe is sleeved by the spinning ring, the steel ball on the spinning ring is used for extruding the outer wall of the pipe, metal on the pipe is rolled to the tooth groove of the threaded core head, and the pipe is drawn by the traction equipment in the inner thread forming process, so that the pipe completes the inner thread processing of the inner wall of the pipe in the moving process.
However, in the spinning forming process, friction exists among the inner core, the pipe and the spinning ring, a large amount of heat is generated in the forming process, and if the heat is not eliminated, on one hand, the spinning forming quality is greatly influenced, on the other hand, the spinning ring and the inner core are easily abraded, and the service life of the spinning ring and the inner core is shortened.
Disclosure of Invention
The invention aims to provide a threaded pipe production process to solve the problems that a large amount of heat generated in spinning forming influences spinning forming quality and reduces the service life of a spinning ring and an inner core in the prior art.
In order to achieve the above purpose, the basic scheme of the invention is as follows:
the threaded pipe production process needs to use threaded pipe production equipment, an inner core for spinning and traction equipment for traction of a pipe, wherein the threaded pipe production equipment comprises a shell, a driver and a spinning ring, the driver is fixedly connected with the shell and is used for driving the spinning ring to rotate, a movable plug is connected onto the shell in a sliding manner, a forming channel convenient for the pipe to penetrate through is formed in the movable plug, a moving stretching die is connected to one end, far away from the spinning ring, of the movable plug, and the moving stretching die corresponds to a moving core head in the inner core; the movable plug is provided with an oil injection channel, an oil supply cavity is arranged on the surface, which is attached to the shell in a sliding mode, of the movable plug, the oil injection channel is communicated with the oil supply cavity, an oil supply unit is connected outside the oil supply cavity, and the oil injection channel can spray oil liquid onto the rotary compression ring.
The production of the threaded pipe comprises the following specific steps:
step one, reducing the diameter of a pipe; in the forming process, the pipe is continuously dragged by the traction equipment to move forwards, when the pipe moves forwards between the moving stretching die and the moving core head, the moving core head continuously rotates, and the pipe is reduced under the rotation of the moving core head and the traction of the traction equipment.
Step two, thread forming; and the pipe after the diameter reduction moves forwards to a position between the spinning ring and the thread core print of the inner core, and the inner thread of the inner wall of the pipe is formed.
In the process of pipe thread forming, the oil supply unit continuously provides oil liquid into the oil supply cavity, the oil liquid passes through the oil injection channel under the action of oil pressure and is sprayed onto the pipe and the steel ball of the spinning ring, the cooling of the pipe, the spinning ring and the inner core is realized, and the lubrication of the spinning ring is realized.
Step three, sizing the threaded pipe; the pipe formed by the threads is pulled to a sizing die by a pulling device, and the pipe is air-pulled by the pulling device to realize sizing of the pipe.
Compare the beneficial effect in prior art:
when the scheme is adopted, the pipe is reduced before the internal thread is formed, so that the forming difficulty of the internal thread in the second step is reduced; and when the thread spinning is carried out in the second step, oil is continuously sprayed on the spinning ring and the pipe, so that the lubricating effect on the spinning ring is achieved while the temperature is reduced, the problem that the product quality is influenced due to the fact that a large amount of heat is generated in spinning forming is solved, and the problem that the service life of the spinning ring and the service life of an inner core are reduced due to rapid temperature rise of the spinning ring is solved.
In addition, the movable plug can move, and the oil supply unit is contacted with an oil supply cavity in the movable plug, so that the oil can be brought to other places of the surfaces which are attached to each other in a sliding manner in the moving process of the movable plug relative to the shell, and the lubrication on the moving path of the movable plug is realized.
In addition, when the threaded pipe is machined and the inner core needs to be taken out, the pipe where the inner core is located needs to be taken out from the spinning ring together, but the pipe can be continuously machined forwards in the process of simultaneously contacting with the spinning ring and the inner core only by continuously applying external force to the pipe by the traction equipment in the spinning process, so that the pipe is still clamped between the spinning ring and the inner core even if the traction force of the traction equipment on the pipe is removed after the threaded pipe is machined, and at the moment, if the residual pipe with the inner core needs to be taken out, the residual pipe needs to be taken out with brute force, but the taking-out mode is difficult and low in efficiency; when the pipe with the inner core is taken out, the pipe is moved to one side of the moving plug away from the spinning ring, the part of the pipe which is not reduced in diameter is abutted against the moving stretching die on the moving plug, the pipe to be taken out is pulled by the moving stretching die to move towards the direction away from the spinning ring, so that the pipe with the inner core can be taken out from the spinning ring in a simple and quick mode, the taking-out difficulty of the pipe with the inner core is reduced, and the taking-out efficiency is improved.
And further, the step four of rolling the threaded pipe after sizing is finished so as to facilitate storage.
Furthermore, a spray pipe is arranged on the threaded pipe production equipment, and the spray pipe can spray oil on the pipe entering the traveling stretching die; and step one, continuously spraying oil to the pipe entering the moving stretching die by using the spray pipe in the pipe reducing process so as to realize the cooling of the pipe and the lubrication of the contact surface of the moving stretching die and the pipe.
Further, the oil supply cavity is annular.
Has the advantages that: the annular oil supply cavity enables the surface of the movable plug, which is attached to the shell in a sliding mode, to be lubricated from top to bottom, and the completeness of lubrication of the sliding path of the movable plug is achieved.
Further, an oil injection ring is fixedly connected to the movable plug, a plurality of oil injection holes are formed in the oil injection ring and face the steel ball on the spinning ring, and the oil injection holes are communicated with the oil injection channel.
Has the advantages that: when the scheme is adopted, the path of oil liquid before being sprayed is lengthened through the arrangement of the oil spraying ring, so that the oil liquid can be closer to the spinning ring before being sprayed, and the accuracy of spraying the oil liquid to the spinning ring is improved; in addition, when the internal thread is processed aiming at the pipes with different specifications, the positions of the steel balls on the spinning rings are not completely the same, and the corresponding oil injection rings can be replaced at the moment, so that oil can still be injected onto the steel balls through the matched oil injection rings, and the lubrication of the steel balls is realized.
Furthermore, an adjusting block is connected to the movable plug, the adjusting block can move on the movable plug, and the adjusting block can abut against the shell.
Has the advantages that: when the pipe material processing aiming at different models is carried out, the sizes of the adopted inner cores are different, the distances between the moving core heads and the thread core heads are different, and in order to enable the production process of the thread pipe to be adaptive to the processing requirements of different thread pipes, the adjusting blocks on the thread pipe production equipment are arranged to adjust the distances between the moving drawing die and the spinning ring, so that the production requirements of different thread pipes are met.
Further, remove and be equipped with airtight cavity between stopper and the casing, can external air feed unit on the casing, air feed unit and airtight cavity intercommunication.
Has the beneficial effects that: when the removal stopper is removed in needs, through providing the volume of atmospheric pressure in order to change airtight cavity for the air feed unit, and then promote the removal of removing the stopper for the removal of removing the stopper is gone on with the help of equipment, and the removal of removing the stopper is more laborsaving, has also improved the degree of automation of screwed pipe production simultaneously.
Furthermore, the movable plug is also connected with a moving die sleeve, the moving die sleeve is fixedly connected with the moving stretching die, the moving die sleeve is connected to the shell in a sliding mode, and the moving direction of the moving die sleeve is parallel to that of the movable plug.
Has the advantages that: the installation of the movable stretching die is convenient through the arrangement of the movable die sleeve.
Furthermore, an elastic piece is fixedly connected between the movable plug and the movable die sleeve.
Has the advantages that: in the process of forming the second thread, because the pipe is drawn by the drawing equipment, rigid force is generated on the pipe by drawing, and the elastic part is arranged at the position, so that the elastic part gives a buffer force to the pipe through the moving drawing die, the stability of processing the pipe is improved, and the quality of processing internal threads of the pipe is improved; on the other hand, when the pipe with the inner core is taken out from the spinning ring, the elastic piece can also give a force far away from the spinning ring to the moving stretching die, so that the pipe with the inner core can be taken out conveniently.
Furthermore, the movable plug is far away from one end of the spinning ring and is fixedly connected with a baffle ring, the baffle ring is fixedly connected with an oil return groove, the oil return groove is located below the moving stretching die, and the moving die sleeve can be abutted to the end of the oil return groove.
Has the advantages that: design through keeping off the ring makes things convenient for the installation of oil gallery, and the setting up of oil gallery makes fluid can stay a period in the oil gallery, can improve fluid in the time that fluid stays to the lubricated effect of the tensile mould that moves about, and in addition, the design of oil gallery also is spacing to the die sleeve formation that moves about.
Drawings
FIG. 1 is a front sectional view of a threaded pipe production apparatus according to an embodiment of the present invention;
FIG. 2 is a view taken along line A of FIG. 1;
fig. 3 is an enlarged schematic view of a portion B in fig. 1.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the device comprises a shell 1, a locking screw 11, a baffle ring 12, an oil return groove 13, an oil inlet hole 14, an oil discharge hole 15, a filter screen 16, a tail cover 17, an oil receiving channel 18, an oil return channel 19, a driver 2, a spinning ring 3, a steel ball 31, a movable plug 4, a forming channel 41, a closed cavity 42, an oil injection channel 43, an oil supply cavity 44, an adjusting block 45, a movable die sleeve 5, a step 51, a movable drawing die 6, a spring 7, an oil injection ring 8, an oil storage groove 81, an oil injection hole 82 and a sizing die 9.
Examples
The embodiment is basically as shown in the attached figures 1 to 3:
the threaded pipe production process needs to use threaded pipe production equipment, an inner core for spinning and traction equipment for drawing a pipe, wherein the traction equipment is used for drawing the pipe to move forwards, the inner core comprises a core rod, a threaded core head and a moving core head, and the threaded core head and the moving core head are fixedly connected to the core rod; wherein screwed pipe production facility includes casing 1, driver 2 and spinning ring 3, driver 2 adopts electric main shaft, driver 2 and 1 fixed connection of casing, driver 2 is used for driving spinning ring 3 and rotates, have steel ball 31 on the spinning ring 3, horizontal sliding connection has removal stopper 4 on the casing 1 (for fixed removal stopper 4, install locking screw 11 on casing 1, locking screw 11 can support tightly on removing stopper 4, it has shaping passageway 41 to open on removing stopper 4, horizontal sliding connection has the die sleeve 5 that moves about in the shaping passageway 41 of removal stopper 4, fixedly connected with drawing die 6 that moves about on the die sleeve 5 that moves about, drawing die 6 that moves about is used for realizing the reducing to tubular product before the shaping internal thread.
A baffle ring 12 is fixedly connected to the movable plug 4 through a screw, an oil return groove 13 is fixedly connected to the baffle ring 12 (the oil return groove 13 is located at one end, far away from the spinning ring 3, of the movable plug 4), the oil return groove 13 is located below the moving stretching die 6, a step 51 is integrally formed on the moving die sleeve 5, the step 51 of the moving die sleeve 5 can abut against the end portion of the oil return groove 13, and the oil return groove 13 is used for limiting the moving die sleeve 5; the movable drawing die further comprises an external spray pipe (not shown in the figure), the spray pipe sprays oil to the pipe entering the movable drawing die 6, and the oil return grooves 13 can receive part of oil sprayed out from the spray pipe so as to improve the lubricating effect of the movable drawing die 6.
An elastic part is fixedly connected between the movable plug 4 and the movable die sleeve 5, the elastic part comprises two springs 7 and two spring 7 sleeves, one spring 7 sleeve is fixedly connected with the movable die sleeve 5, one spring 7 sleeve is fixedly connected with the movable plug 4, and the spring 7 sleeve is arranged between the two spring 7 sleeves.
A closed cavity 42 is formed between the movable plug 4 and the shell 1, an air supply unit can be externally connected to the shell 1 and can be an air pump, and the air supply unit is communicated with the closed cavity 42.
Move and be connected with adjusting block 45 on stopper 4, adjusting block 45 can move on removing stopper 4, adjusting block 45 can offset with casing 1, in this embodiment, adjusting block 45 adopts adjusting nut, adjusting nut threaded connection is on removing stopper 4, be connected with the locating pin on the adjusting nut, the locating pin is used for locking adjusting nut position on removing stopper 4 after adjusting nut position adjustment, setting through adjusting nut and locating pin, so as to play the distance between adjustment drawing die 6 and the spinning ring 3 that move about, and then adapt to the production demand of different screwed pipes.
The movable plug 4 is provided with an oil injection channel 43, the surface of the movable plug 4, which is in sliding contact with the shell 1, is provided with an annular oil supply cavity 44, the oil supply cavity 44 is communicated with the oil injection channel 43, the shell 1 is provided with an oil inlet 14 communicated with the oil supply cavity 44, and the oil inlet 14 is externally connected with an oil supply unit;
remove on the terminal surface of stopper 4 orientation spinning ring 3 through screw fixedly connected with spout oil ring 8, it has oil storage tank 81 and a plurality of nozzle opening 82 to spout oil ring 8 to open, the quantity of nozzle opening 82 adopts 3 in this embodiment, 3 nozzle opening 82 are in the top of spouting oil ring 8, the left and right-hand, nozzle opening 82 and oil storage tank 81 intercommunication, oil storage tank 81 and oil spout passageway 43 intercommunication, nozzle opening 82 is towards the steel ball 31 on the spinning ring 3, nozzle opening 82 can spout oil to steel ball 31 on.
An oil discharge hole 15 is formed in the shell 1, and the oil discharge hole 15 is located right below the rotary pressure ring 3 so as to facilitate timely discharge of oil; a filter screen 16 is fixedly arranged on the oil discharge hole 15, and an oil discharge pipe is communicated below the oil discharge hole 15.
Casing 1 keeps away from spinning ring 3 and the right-hand member fixedly connected with tail-hood 17 that removes stopper 4, fixedly connected with sizing mould 9 on the tail-hood 17, tubular product realizes realizing the internal thread shaping between the screw core head of going into spinning ring 3 and interior pole after drawing mould 6 realizes reducing moving about, tubular product realizes the fixed of tubular product external diameter through sizing mould 9 at last, it has oil receiving channel 18 and oil return channel 19 to open on the tail-hood 17, the external oil pump of oil receiving channel 18, the play oil pipe of oil pump with connect oil channel 18 intercommunication, the oil return pipe and the oil return channel 19 intercommunication of oil pump, the fluid that pumps through the oil pump realizes lubricating and cooling to sizing mould 9 and tubular product.
The production of the threaded pipe comprises the following specific steps:
step one, reducing the diameter of a pipe; in the forming process, the inner core is required to be shared by the first step and the second step, so that the first step and the second step are synchronously processed at different positions of the pipe.
In the step, the pipe is continuously dragged by the traction equipment to move forwards, when the pipe moves forwards between the moving stretching die 6 and the moving core head, the moving core head continuously rotates, and the pipe is reduced under the rotation of the moving core head and the traction of the traction equipment; when the diameter of the pipe is reduced, the oil sprayed from the spray pipe cools the pipe, and the oil sprayed from the spray pipe lubricates the traveling stretching die 6.
Step two, thread forming; the reduced pipe moves forwards to a position between the spinning ring 3 and the thread core print of the inner core, the spinning ring 3 rotates to drive the steel ball 31 to rotate and revolve, the steel ball 31 moves to drive the thread core print of the inner core to rotate, internal threads on the inner wall of the pipe are formed under the action of the traction equipment, the spinning ring 3 and the inner core, and meanwhile, the pipe continuously moves forwards.
In the process of forming the threads of the pipe, the oil supply unit continuously supplies oil liquid into the oil supply cavity 44, the oil liquid passes through the oil injection channel 43 and the oil storage tank 81 under the action of oil pressure, is sprayed out of the oil injection hole 82 to the pipe and the steel ball 31 of the spinning ring 3, finally falls to the oil discharge hole 15, and is discharged out of the shell 1 through the oil discharge pipe; the whole process realizes the cooling of the pipe, the spinning ring 3 and the inner core through oil, and simultaneously realizes the lubrication of the spinning ring 3.
Step three, sizing the threaded pipe; the pipe subjected to thread forming is drawn to the sizing die 9 by the drawing equipment, and the pipe is air-drawn by the drawing equipment to realize sizing of the pipe.
In the sizing process, the oil pump continuously pumps oil out of the sizing die 9 and the pipe, so that the pipe and the sizing die 9 are lubricated and cooled.
And step four, winding the sized threaded pipe to facilitate storage.
When the embodiment is adopted, when the whole pipe is molded and a section of pipe with an inner core needs to be taken out, firstly, the pipe is cut at the rear end of the sizing die 9, and the pipe remained in the equipment after cutting is still pressed between the spinning ring 3 and the inner core; secondly, in order to conveniently and rapidly take out the pipe with the inner core, the locking screw 11 is firstly loosened, so that the movable plug 4 can move on the shell 1; thirdly, air pressure is provided for the closed cavity 42 through the air supply unit to force the movable plug 4 to move leftwards, and in the process that the movable plug 4 is far away, the part of the pipe which is not reduced in diameter is tightly propped against the moving stretching die 6, namely the moving stretching die 6 pulls the pipe to be taken out to move leftwards, so that the pipe with the inner core is taken out from the spinning ring 3; in the process, as the pipe loses the traction force of the traction equipment, the elastic force of the spring 7 on the elastic part is released, so that the floating die sleeve 5 is pushed to move leftwards, the floating stretching die 6 and the pipe also move leftwards, and the pipe with the inner core is conveniently separated from the spinning ring 3.
In addition, in this embodiment, when spinning the screw thread in step two, fluid constantly spouts on spinning ring 3 and tubular product, when realizing the cooling, has also played the lubrication action to spinning ring 3, has solved the problem that produces a large amount of heats and influences product quality in the spinning forming and has solved spinning ring 3 and the problem that inner core life-span reduces because of rapid heating up brings spinning ring 3.
In addition, the movable plug 4 can move, and the oil supply unit is contacted with the oil supply cavity 44 in the movable plug 4, so that the oil can be brought to other places of the surfaces which are in sliding contact with each other in the moving process of the movable plug 4 relative to the shell 1, and the movable plug 4 can be lubricated on the moving path.
The above description is only an example of the present invention, and the common general knowledge of the known specific structures and characteristics in the schemes is not described herein. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be defined by the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (8)
1. The production process of the threaded pipe is characterized by comprising the following steps: the manufacturing method comprises the following steps that threaded pipe production equipment, an inner core for spinning and traction equipment for traction of a pipe are required to be used, wherein the threaded pipe production equipment comprises a shell, a driver and a spinning ring, the driver is fixedly connected with the shell, the driver is used for driving the spinning ring to rotate, a movable plug is connected onto the shell in a sliding mode, a forming channel which is convenient for the pipe to penetrate through is formed in the movable plug, a moving stretching die is connected to one end, away from the spinning ring, of the movable plug, and the moving stretching die corresponds to a moving core head in the inner core; the movable plug is provided with an oil injection channel, an oil supply cavity is arranged on the surface of the movable plug, which is in sliding contact with the shell, the oil injection channel is communicated with the oil supply cavity, an oil supply unit is connected outside the oil supply cavity, and the oil injection channel can spray oil liquid onto the rotary compression ring; the movable plug is also connected with a moving die sleeve, the moving die sleeve is fixedly connected with a moving stretching die, the moving die sleeve is connected to the shell in a sliding manner, and the moving direction of the moving die sleeve is parallel to that of the movable plug; an elastic part is fixedly connected between the movable plug and the movable die sleeve;
the production of the threaded pipe comprises the following specific steps:
step one, reducing the diameter of a pipe; in the forming process, the pipe is continuously dragged by the traction equipment to move forwards, when the pipe moves forwards between the moving stretching die and the moving core head, the moving core head continuously rotates, and the pipe is reduced under the rotation of the moving core head and the traction of the traction equipment;
step two, thread forming; the pipe after reducing moves forward to between the spinning ring and the thread core print of the inner core, the inner wall of the pipe is formed by internal thread;
in the process of pipe thread forming, the oil supply unit continuously supplies oil to the oil supply cavity, and the oil passes through the oil injection channel under the action of oil pressure and is sprayed onto the pipe and the steel ball of the spinning ring, so that the cooling of the pipe, the spinning ring and the inner core is realized, and the lubrication of the spinning ring is realized;
step three, sizing the threaded pipe; the pipe formed by the threads is pulled to a sizing die by a pulling device, and the pipe is air-pulled by the pulling device to realize sizing of the pipe.
2. The threaded pipe production process according to claim 1, wherein: and step four, rolling the threaded pipe after sizing is completed so as to facilitate storage.
3. The threaded pipe production process according to claim 1, wherein: the threaded pipe production equipment is provided with a spray pipe, and the spray pipe can spray oil on the pipe entering the traveling stretching die; and step one, continuously spraying oil to the pipe entering the moving stretching die by using the spray pipe in the pipe reducing process so as to realize the cooling of the pipe and the lubrication of the contact surface of the moving stretching die and the pipe.
4. The threaded pipe production process according to claim 1, wherein: the oil supply cavity is annular.
5. The threaded pipe production process according to claim 1, wherein: and the movable plug is fixedly connected with an oil injection ring, the oil injection ring is provided with a plurality of oil injection holes, the oil injection holes face the steel balls on the spinning ring, and the oil injection holes are communicated with the oil injection channel.
6. The threaded pipe production process according to claim 1, wherein: the movable plug is connected with an adjusting block, the adjusting block can move on the movable plug, and the adjusting block can abut against the shell.
7. The threaded pipe production process according to claim 1, wherein: remove and be equipped with airtight cavity between stopper and the casing, can external air supply unit on the casing, air supply unit and airtight cavity intercommunication.
8. The threaded pipe production process according to claim 1, wherein: the movable plug is far away from one end of the rotary compression ring and is fixedly connected with a baffle ring, the baffle ring is fixedly connected with an oil return groove, the oil return groove is located below the moving stretching die, and the moving die sleeve can be abutted to the end of the oil return groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110735574.3A CN113385550B (en) | 2021-06-30 | 2021-06-30 | Threaded pipe production process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110735574.3A CN113385550B (en) | 2021-06-30 | 2021-06-30 | Threaded pipe production process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113385550A CN113385550A (en) | 2021-09-14 |
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| CN117463850B (en) * | 2023-12-27 | 2024-04-02 | 新乡龙鑫精密模具制造有限公司 | Special device for forming internal thread copper pipe |
| CN117772840B (en) * | 2024-02-28 | 2024-04-30 | 常州润来科技有限公司 | Copper pipe internal thread continuous forming device and use method |
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| AT277711B (en) * | 1967-06-30 | 1970-01-12 | Fischer Ag Georg | Thread cutting stock |
| CN1112861A (en) * | 1994-09-24 | 1995-12-06 | 广山市黄埔铜管材有限公司 | Spinning disk pressing and drawing machine for mfg. internal screw tube |
| CN101402126A (en) * | 2008-11-10 | 2009-04-08 | 苏州奥智机电设备有限公司 | Internal ribbed tube molding device |
| CN205833916U (en) * | 2016-03-30 | 2016-12-28 | 浙江群展精密紧固件股份有限公司 | Screw internal screw forming device |
| CN106607472B (en) * | 2016-11-24 | 2018-03-27 | 浙江耐乐铜业有限公司 | A kind of copper pipe internal thread forming device |
| CN108284145A (en) * | 2018-04-11 | 2018-07-17 | 宁波金田铜管有限公司 | A kind of molding machine and its application method of outsole wall thickness inner screw thread copper pipe |
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