Equipment for preparing square tubes from round tubes based on the mechanism of regulating high-temperature plastic deformation of metals

Abstract

The present invention relates to the technical field of metal pipe processing. The present invention discloses a device for preparing square pipes from round pipes based on the mechanism of regulating high-temperature plastic deformation of metals, including a frame and a hot deformation mechanism and a quenching and straightening mechanism both arranged on the frame. The hot deformation mechanism is used for performing high-temperature plastic deformation on the round pipe, and the quenching and straightening mechanism is used for performing quenching treatment on the deformed square pipe; a preheating outer mold and a shaping outer mold are both arranged on the frame, a preheating rod group is arranged inside the preheating outer mold, and the inner cavity of the preheating outer mold is cylindrical; a quenching outer mold and a straightening outer mold are both arranged on the frame, a quenching liquid pipe and a collecting pipe are both arranged on the quenching outer mold, a quenching cavity is formed inside the wall plate of the quenching outer mold, the quenching liquid pipe is communicated with the quenching cavity, the quenching cavity is communicated with the inner cavity of the quenching outer mold, and the collecting pipe is communicated with the inner cavity of the quenching outer mold. The present invention can improve the service life and production efficiency of square pipes, and solves the problem of low weld accuracy in the processing of square pipes by bending and welding.

Description

Technical Field

[0001] The present invention relates to the technical field of metal tube processing, and more specifically, to an apparatus for preparing square tubes from round tubes based on the mechanism of regulating high-temperature plastic deformation of metals. Background Art

[0002] Rare metal profiles, especially materials with high strength but limited oxidation resistance such as titanium and zirconium, have been widely used in many high-end fields such as aerospace and nuclear engineering. Currently, for materials such as steel and aluminum that have good plasticity at room temperature, their forming processes and corresponding forming equipment have been relatively mature. However, for rare metal square tubes with poor plasticity at room temperature, their forming technologies and equipment are still in the stage of continuous development.

[0003] In traditional square tube forming processes, a round tube is usually fed into a series of rolling mills at room temperature and shaped into a square tube through rolling. For example, the rectangular steel tube rolling mill described in Chinese Patent CN104384188 is particularly suitable for metal materials with good plasticity at room temperature. However, for rare metal materials with poor plasticity at room temperature, conventional roll forming technologies are inadequate.

[0004] Another common method for forming square tubes is to first bend a sheet into two U-shaped grooves, then weld them twice, and finally shape the square tube through heat treatment. For example, the zirconium alloy component box preparation process mentioned in Chinese Patent CN201611145910.4 involves multiple steps such as two bends, two welds, and hot straightening.

[0005] Although the bending and welding technology can be used to form square tubes of metals with poor plasticity at room temperature, the square tubes produced by this method have two welds, and the accuracy of the welds is often not high, usually requiring further processing to meet the accuracy requirements. The square tubes obtained through such a processing method not only have low production efficiency but also have a shortened service life. Summary of the Invention

[0006] The present invention provides an apparatus for preparing square tubes from round tubes based on the mechanism of regulating high-temperature plastic deformation of metals, which solves the problem of low weld accuracy in the processing of square tubes by bending and welding. This apparatus can be applied to the forming of square tubes of metal materials with poor plasticity at room temperature, improving the service life and accuracy of square tubes and enhancing the production efficiency of square tubes.

[0007] The present invention adopts the following technical solutions to achieve the invention purpose:

[0008] A device for preparing square tubes from circular tubes based on the regulation mechanism of high-temperature plastic deformation of metals, comprising a frame, a hot deformation mechanism and a quenching and straightening mechanism both arranged on the frame. The hot deformation mechanism is used for performing high-temperature plastic deformation on the circular tube, and the quenching and straightening mechanism is used for performing quenching treatment on the deformed square tube;

[0009] The hot deformation mechanism includes a preheating assembly, a shaping assembly, an inner mold and a fixing member. The preheating assembly includes a preheating outer mold and a preheating rod group, and the shaping assembly includes a shaping outer mold and a heating rod group;

[0010] The preheating outer mold and the shaping outer mold are both arranged on the frame. The preheating rod group is arranged inside the preheating outer mold, and the heating rod group is arranged inside the shaping outer mold. The inner cavity of the preheating outer mold is cylindrical. The inner cavity of the shaping outer mold near the preheating outer mold end is cylindrical, and the inner cavity of the shaping outer mold far from the preheating outer mold end is square-columnar. The fixing member is arranged on the frame. One end of the inner mold is arranged on the fixing member, and the other end passes through the preheating outer mold and is arranged inside the shaping outer mold. The inner mold is adapted to the inner cavity structures of the preheating outer mold and the shaping outer mold;

[0011] The quenching and straightening mechanism includes a quenching outer mold, a straightening outer mold, a quenching liquid pipe and a collecting pipe;

[0012] The quenching outer mold and the straightening outer mold are both arranged on the frame. The quenching liquid pipe and the collecting pipe are both arranged on the quenching outer mold. The inner cavities of the quenching outer mold and the straightening outer mold are both square-columnar. A quenching cavity is formed inside the wall plate of the quenching outer mold. The quenching liquid pipe is communicated with the quenching cavity, the quenching cavity is communicated with the inner cavity of the quenching outer mold, and the collecting pipe is communicated with the inner cavity of the quenching outer mold.

[0013] As a further limitation of this technical solution, the quenching and straightening mechanism further includes a plurality of abutting plates arranged at the inner cavity of the quenching outer mold.

[0014] As a further limitation of this technical solution, the quenching and straightening mechanism further includes a straightening assembly, and the straightening assembly includes a quenching rotating cylinder and a connecting pipe.

[0015] The connecting pipe is arranged inside the quenching outer mold, and the quenching rotating cylinder is arranged at the outlet end of the connecting pipe.

[0016] As a further limitation of this technical solution, the straightening assembly further includes a conical disc and a guiding ring;

[0017] The conical disk is arranged in the quenching cavity. The connecting pipe is fixedly arranged on the conical disk. The connecting pipe is of a hollow structure. Through holes are formed in the quenching rotating cylinder. The quenching cavity is communicated with the inner cavity of the quenching outer mold through the connecting pipe and the quenching rotating cylinder. The quenching rotating cylinder is rotatably connected to the roller bracket at the bottom of the connecting pipe. The roller bracket is fixedly connected to the connecting pipe. The inside of the roller bracket is communicated with the inside of the connecting pipe. The guiding ring is fixedly arranged on the quenching outer mold at a position corresponding to the quenching cavity.

[0018] As a further limitation of this technical solution, the quenching cavity is of a conical structure. The conical disk is made of an elastic material. The connecting pipe is slidably arranged at the center of the guiding ring.

[0019] As a further limitation of this technical solution, a plurality of quenching holes are further formed inside the quenching outer mold. The quenching cavity is communicated with the inner cavity of the quenching outer mold through the plurality of quenching holes. In the natural state, the side wall of the conical disk blocks the orifice of the quenching hole.

[0020] As a further limitation of this technical solution, the quenching and correcting mechanism further includes a heat insulation plate. The heat insulation plate is arranged on the quenching outer mold and is located between the quenching outer mold and the shaping outer mold. The collecting pipe is arranged on the heat insulation plate. The inner cavity of the heat insulation plate is of a square column shape.

[0021] As a further limitation of this technical solution, the quenching and correcting mechanism further includes a guiding mold. The guiding mold is arranged at one end of the frame close to the correcting outer mold. The inner cavity of the guiding mold is of a square column shape.

[0022] As a further limitation of this technical solution, the thermal deformation mechanism further includes a group of inner mold heat preservation rods. The group of inner mold heat preservation rods is arranged inside the inner mold.

[0023] As a further limitation of this technical solution, an atmosphere protection cover is further included. The atmosphere protection cover is detachably connected to the frame.

[0024] Compared with the prior art, the advantages and positive effects of the present invention are:

[0025] 1. Through the setting of the thermal deformation mechanism, the preheating rod group preheats the round pipe. One end of the preheated round pipe is moved into the inner cavity of the shaping outer mold. The heating rod group provides a higher temperature to heat the round pipe, so that when the round pipe passes through the middle of the inner mold, high-temperature plastic deformation occurs, and the front end of the round pipe is gradually deformed into a square pipe. With this setting, the square pipe obtained by this technology no longer needs to go through multiple bending and welding, and no further processing of the weld is required to meet the production accuracy requirements of the square pipe. The round pipe can be directly manufactured into a square pipe without welds at one time, improving the service life of the square pipe and the production efficiency of the square pipe. It has high practicability for manufacturing rare metal square pipes with high strength and poor room-temperature plasticity, and the service life of the square pipe is also improved.

[0026] 2. Through the setting of the quenching correction mechanism, the quenching liquid pipe outputs quenching liquid into the quenching cavity. The quenching liquid flows into the inner cavity of the quenching outer mold through multiple quenching holes, making the distribution of the quenching liquid more uniform. The quenching liquid quenches one end of the deformed square pipe. After that, the quenching liquid is collected and discharged through the collecting pipe under the heat insulation plate. While positioning and supporting one end of the square pipe, the abutting plate can further promote the uniform distribution of the quenching liquid, enabling the quenching liquid to fully flow through each surface of the square pipe, improving the production quality and service life of the deformed square pipe, reducing the probability of defects. One end of the square pipe after quenching and shaping continues to move into the guiding mold, and the guiding mold guides and supports the square pipe, making it difficult for the subsequent round pipe to deviate during movement.

[0027] 3. Through the setting of the correction component, during the slow movement of the square pipe, the quenching rotating cylinder rotates relative to one end face of the square pipe, and at the same time provides a certain supporting and positioning function for the square pipe, making it difficult for the square pipe to undergo large deformation during contact with the quenching liquid and not easily causing large wear with the abutting plate during movement, thereby reducing the probability of cracks and improving the processing quality of the square pipe; when the amount of quenching liquid input by the quenching liquid pipe increases, the conical disk undergoes further elastic deformation, and the upper end of the conical disk moves downward along the conical quenching cavity, removing the covering of the quenching holes, enabling more quenching liquid to enter the inner cavity of the quenching outer mold through the quenching holes. The quenching rotating cylinder is not likely to damage one end face of the square pipe due to excessive pressure, reducing the probability of defects. At the same time, the flow rate of the quenching liquid in the inner cavity of the quenching outer mold increases, accelerating the quenching speed of the square pipe and improving production efficiency.

[0028] 4. Since conventional plastic deformation molds usually only heat the outer surface of the round pipe and do not heat or insulate the inside of the round pipe, it is easy to cause uneven heating of the round pipe and too long overall heating time of the round pipe. Through the setting of the inner mold heat preservation rod group, the inner mold heat preservation rod group heats and insulates the inside of the round pipe, which can improve the uniformity of heat reception of the round pipe, reduce the probability of defects, and thus improve production accuracy and production efficiency.

[0029] 5. Through the setting of the mold fixing component, the fastening frame is installed on the preheating outer mold, shaping outer mold, quenching outer mold, and correction outer mold, and the first fixing bar, second fixing bar, and third fixing bar are installed to further fix it, reducing the probability of the device deviating during feeding and improving the accuracy and reliability of device use. Description of the Drawings

[0030] The accompanying drawings described herein are used to provide a further understanding of the present application and form a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation of the present application. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention, and for those of ordinary skill in the art, other accompanying drawings can be obtained based on these drawings without creative efforts. In the drawings:

[0031] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 is a schematic diagram of a partial structure of the present invention;

[0033] Figure 3 is Figure 1 a sectional view taken along the A-A direction in;

[0034] Figure 4 is Figure 3 an enlarged view of part B in;

[0035] Figure 5 is a schematic diagram of a partial structure of the calibration assembly;

[0036] Figure 6 is a schematic diagram of a partial structure of the calibration assembly from another perspective;

[0037] Figure 7 is a schematic diagram of the structures of the conical disk, quenching rotating cylinder, and connecting pipe;

[0038] Figure 8 is a schematic diagram of a partial structure of the calibration assembly and the abutting plate.

[0039] In the figure: 1, frame; 2, thermal deformation mechanism; 21, preheating assembly; 211, preheating outer mold; 212, preheating rod group; 22, shaping assembly; 221, shaping outer mold; 222, heating rod group; 23, inner mold; 24, fixing member; 25, inner mold heat preservation rod group; 26, mold fixing assembly; 261, first fixing bar; 262, second fixing bar; 263, fastening frame; 264, third fixing bar; 3, quenching and calibration mechanism; 31, quenching outer mold; 311, quenching cavity; 312, quenching hole; 32, calibration outer mold; 33, quenching liquid pipe; 34, collecting pipe; 35, heat insulation plate; 36, abutting plate; 37, guiding mold; 38, calibration assembly; 381, quenching rotating cylinder; 382, connecting pipe; 3821, roller bracket; 383, conical disk; 384, guiding ring; 4, atmosphere protection cover. Detailed Embodiments

[0040] The following will combine the present invention's Figures 1-8, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0041] It should be noted that the directional terms such as left, right, up, down, front, and back in the embodiments of the present invention are only relative concepts to each other or are referenced based on the normal use state of the product, that is, the traveling direction of the product, and should not be considered as restrictive.

[0042] When a component is referred to as being "located" or "disposed on" another component, it can be on another component or there may be an intermediate component present at the same time. When a component is referred to as being "connected to" another component, it can be directly connected to another component or there may be an intermediate component present at the same time.

[0043] An apparatus for preparing square tubes from round tubes based on the mechanism of regulating metal high-temperature plastic deformation includes a frame 1, a hot deformation mechanism 2, a quenching and straightening mechanism 3, and an atmosphere protection cover 4, all of which are disposed on the frame 1. The hot deformation mechanism 2 is used for performing high-temperature plastic deformation on the round tube, the quenching and straightening mechanism 3 is used for performing quenching treatment on the deformed square tube, and the atmosphere protection cover 4 is detachably connected to the frame 1.

[0044] The hot deformation mechanism 2 includes a preheating assembly 21, a shaping assembly 22, an inner mold 23, a fixing member 24, an inner mold heat-insulating rod group 25, and a mold fixing assembly 26. The preheating assembly 21 includes a preheating outer mold 211 and a preheating rod group 212. The shaping assembly 22 includes a shaping outer mold 221 and a heating rod group 222. The preheating outer mold 211 and the shaping outer mold 221 are both fixedly connected to the frame 1 by bolts. The preheating rod group 212 is fixedly connected inside the preheating outer mold 211, and the heating rod group 222 is fixedly connected inside the shaping outer mold 221. The inner cavity of the preheating outer mold 211 is cylindrical. The inner cavity of the shaping outer mold 221 at one end close to the preheating outer mold 211 is cylindrical, and the inner cavity of the shaping outer mold 221 at the end far from the preheating outer mold 211 is square-columnar. The fixing member 24 is fixedly connected to the frame 1 by bolts. One end of the inner mold 23 is fixedly connected to the fixing member 24, and the other end passes through the preheating outer mold 211 and is located inside the shaping outer mold 221. One end of the inner mold 23 close to the preheating outer mold 211 is cylindrical, and one end of the inner mold 23 far from the preheating outer mold 211 is square-columnar. The inner mold heat-insulating rod group 25 is fixedly connected inside the inner mold 23.

[0045] The mold fixing assembly 26 includes a first fixed stop bar 261, a second fixed stop bar 262, a fastening frame 263, and a third fixed stop bar 264, all of which are fixedly connected to the frame 1 by bolts. The first fixed stop bar 261 abuts against the preheating outer mold 211, the second fixed stop bar 262 abuts against the preheating outer mold 211 and the shaping outer mold 221, the third fixed stop bar 264 abuts against the quenching and straightening mechanism 3. A plurality of fastening frames 263 are provided and fixedly connected to the frame 1 by bolts. The plurality of fastening frames 263 are respectively sleeved on the preheating outer mold 211, the shaping outer mold 221, and the quenching and straightening mechanism 3.

[0046] The quenching and straightening mechanism 3 includes a quenching outer mold 31, a straightening outer mold 32, a quenching liquid pipe 33, a collecting pipe 34, a butting plate 36, a straightening assembly 38, a heat insulation plate 35, and a guiding mold 37. The quenching outer mold 31 and the straightening outer mold 32 are both fixedly connected to the frame 1 by bolts. The quenching outer mold 31 and the straightening outer mold 32 are integrally formed. Four quenching liquid pipes 33 are provided, and the four quenching liquid pipes 33 are all fixedly connected to the quenching outer mold 31. The inner cavities of the quenching outer mold 31 and the straightening outer mold 32 are both square columnar. A plurality of butting plates 36 are provided, and the plurality of butting plates 36 are all fixedly connected to the inner cavity of the quenching outer mold 31;

[0047] The calibration assembly 38 includes a quenching drum 381, a connecting pipe 382, a conical disk 383, and a guiding ring 384. A quenching cavity 311 is formed inside the wall plate of the quenching outer mold 31. The quenching liquid pipe 33 communicates with the quenching cavity 311. The quenching cavity 311 is of a conical structure. The conical disk 383 is made of an elastic material and is arranged inside the quenching cavity 311. The guiding ring 384 is fixedly arranged on the quenching outer mold 31. The connecting pipe 382 is slidably connected to the center of the guiding ring 384. The inlet end of the connecting pipe 382 passes through the center of the conical disk 383 and extends to the large-mouth end of the conical disk 383. The connecting pipe 382 and the conical disk 383 are fixedly connected. The connecting pipe 382 is of a hollow structure. The quenching drum 381 is arranged at the outlet end of the connecting pipe 382. Through holes are formed in the quenching drum 381. The quenching cavity 311 communicates with the inner cavity of the quenching outer mold 31 through the connecting pipe 382 and the quenching drum 381. A plurality of quenching holes 312 are formed in the quenching outer mold 31. The quenching cavity 311 also communicates with the inner cavity of the quenching outer mold 31 through the plurality of quenching holes 312. In the natural state, the side wall of the conical disk 383 blocks the orifice of the quenching hole 312. The central axis of the quenching drum 381 is rotatably connected to a roller bracket 3821 at the bottom of the connecting pipe 382. The roller bracket 3821 is of a barrel-shaped structure. The bottom of the roller bracket 3821 has a notch and one side is closed. The central axis of the quenching drum 381 is rotatably connected to the closed side of the roller bracket 3821 and the bottom leaks out from the roller bracket 3821 partially. The roller bracket 3821 is fixedly connected to the connecting pipe 382. The inside of the roller bracket 3821 and the inside of the connecting pipe 382 communicate with each other. The guiding ring 384 is fixedly arranged on the quenching outer mold 31 at the position corresponding to the quenching cavity 311;

[0048] The heat insulation plate 35 is fixedly connected to the quenching outer mold 31. The heat insulation plate 35 is located between the quenching outer mold 31 and the shaping outer mold 221 and abuts against the quenching outer mold 31 and the shaping outer mold 221. The inner cavity of the heat insulation plate 35 is of a square columnar shape. The collecting pipe 34 is fixedly connected to the heat insulation plate 35. The collecting pipe 34 communicates with the inner cavity of the quenching outer mold 31. The guiding mold 37 is fixedly connected to one end of the frame 1 close to the calibration outer mold 32 by bolts. The inner cavity of the guiding mold 37 is of a square columnar shape. The guiding mold 37 and the calibration outer mold 32 are coaxially arranged. The third fixed stop 264 abuts against the calibration outer mold 32. A plurality of fastening frames 263 are respectively sleeved on the preheating outer mold 211, the shaping outer mold 221, the quenching outer mold 31, and the calibration outer mold 32.

[0049] In some embodiments, the inner wall of the guiding die 37 is a smooth and flat plane. The inner cavity of the guiding die 37 corresponds to and has the same size as the inner cavity of the calibration outer die 32, ensuring that the square pipe can move precisely along the guiding die 37 when being removed. A guiding rod can also be arranged between the guiding die 37 and the calibration outer die 32. The two ends of the guiding rod are respectively fixedly connected to the guiding die 37 and the calibration outer die 32. One side of the guiding rod corresponding to the center line of the guiding die 37 forms a plane with the inner walls of the guiding die 37 and the calibration outer die 32. The pipe fitting can move along the guiding rod until it enters the guiding die. Specifically, the guiding rod plays a guiding role to ensure that the pipe fitting can slide horizontally.

[0050] The working principle of this embodiment is as follows:

[0051] During use, install the fastening frame 263 on the preheating outer die 211, the shaping outer die 221, the quenching outer die 31 and the calibration outer die 32, and install the first fixed stop bar 261, the second fixed stop bar 262 and the third fixed stop bar 264 to further fix it, reducing the probability of the device shifting during the feeding process and improving the accuracy and reliability of the device. Install the round pipe at the cylindrical end of the inner die 23, install one end of the inner die 23 on the fixing part 24, and the other end passes through the preheating outer die 211 and is located inside the shaping outer die 221. Install the atmosphere protection cover 4 on the frame 1 and supply an inert atmosphere inside to prevent the heated components from being oxidized easily. The preheating rod group 212 preheats the round pipe. Push the round pipe through the hydraulic cylinder to move one end of the preheated round pipe into the inner cavity of the shaping outer die 221. The heating rod group 222 provides a higher temperature to heat the round pipe, causing the round pipe to undergo high-temperature plastic deformation when passing through the middle of the inner die 23, and the front end of the round pipe is gradually deformed into a square pipe. With such a setting, the square pipe obtained by this technology no longer needs to go through multiple bending and welding processes, and no further processing of the weld is required, being able to meet the accuracy requirements of the square pipe, and can be applied to the forming of square pipes made of metal materials with poor room-temperature plasticity, improving the service life of the square pipe and the production efficiency of the square pipe.

[0052] Move the round tube forward continuously so that one end deformed into a square tube moves into the internal part of the quenching outer mold 31. The quenching liquid pipe 33 is connected to a quenching liquid source to output quenching liquid into the quenching cavity 311. The quenching liquid enters the conical disk 383 along the conical-structured quenching cavity 311. Since the input quenching liquid usually has a certain pressure, the conical disk 383 will move downward and undergo a certain degree of elastic deformation under the action of the pressure, causing the conical disk 383 to drive the quenching rotating cylinder 381 to descend a certain distance, so that the quenching rotating cylinder 381 presses tightly against the side wall of the square tube. The quenching liquid enters the inside of the connecting pipe 382, then enters the quenching rotating cylinder 381, and flows through the through holes on the quenching rotating cylinder 381 into the inner cavity of the quenching outer mold 31. The quenching liquid quenches and cools the surface of the deformed square tube. Due to the setting of the abutting plate 36, while positioning and supporting one end of the square tube, the abutting plate 36 can further promote the uniform distribution of the quenching liquid, enabling the quenching liquid to fully flow through each surface of the square tube, improving the production quality and service life of the square tube, and reducing the probability of defects;

[0053] When one end of the square tube exits from the inner cavity of the quenching outer mold 31, pull the square tube outward to slowly move it out. During the slow movement of the square tube, the quenching rotating cylinder 381 rotates relative to the square tube, and at the same time provides a certain supporting and positioning effect for the square tube, so that the square tube is not prone to large deformation during the contact with the quenching liquid and is not prone to large wear with the abutting plate 36 during the movement, thereby reducing the probability of cracks and improving the processing quality of the square tube;

[0054] When the amount of quenching liquid input by the quenching liquid pipe 33 increases, the conical disk 383 undergoes further elastic deformation. The upper end of the conical disk 383 moves downward along the conical-structured quenching cavity 311, and the conical disk 383 removes the covering of the quenching holes 312, enabling more quenching liquid to enter the inner cavity of the quenching outer mold 31 through the quenching holes 312. The quenching rotating cylinder 381 is made of an elastic material, and the quenching rotating cylinder 381 is not prone to damaging the surface of the square tube due to excessive pressure, reducing the probability of defects. At the same time, the flow rate of the quenching liquid in the inner cavity of the quenching outer mold 31 increases, accelerating the quenching speed of the square tube and improving the production efficiency;

[0055] When the quenching of the square tube is basically completed, the amount of quenching liquid input by the quenching liquid pipe 33 decreases. At this time, the conical disk 383 gradually returns to its initial state and drives the quenching rotating cylinder 381 to rise. The quenching liquid is collected through the collecting pipe 34 below the heat insulation plate 35 and then discharged. Since the temperature of the quenching liquid increases after quenching treatment, the collecting pipe 34 is arranged below the heat insulation plate 35, enabling the collected quenching liquid to play a role in slowly cooling the square tube, so that the square tube is not prone to defects due to excessive temperature difference when entering the quenching outer mold 31, further improving the production quality and production accuracy, and improving the production efficiency of the square tube.

[0056] Continue to move one end of the deformed square tube into the inner cavity of the calibration outer die 32. The inner cavity of the calibration outer die 32 fits the outer surface of the square tube, further cooling and shaping the quenched square tube, reducing the probability of dents and defects. One end of the shaped square tube continues to move into the guiding die 37. The guiding die 37 guides and supports the square tube, making it difficult for the subsequent round tube to deviate during movement, facilitating meeting the requirements of production accuracy, increasing the service life of the square tube, and improving the production efficiency of the square tube.

[0057] The specific embodiments of the present invention disclosed above are only examples. However, the present invention is not limited thereto, and any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A device for preparing square tubes from round tubes based on the mechanism of metal high temperature plastic deformation control, characterized in that: It comprises a frame (1), and a thermal deformation mechanism (2) and a quenching correction mechanism (3) both arranged on the frame (1), wherein the thermal deformation mechanism (2) is used to perform high-temperature plastic deformation on a round tube, and the quenching correction mechanism (3) is used to perform quenching treatment on a deformed square tube; The thermal deformation mechanism (2) comprises a preheating component (21), a shaping component (22), an inner mold (23) and a fixing member (24); the preheating component (21) comprises a preheating outer mold (211) and a preheating rod group (212); the shaping component (22) comprises a shaping outer mold (221) and a heating rod group (222); The preheating outer mold (211) and the shaping outer mold (221) are both arranged on the frame (1); the preheating rod group (212) is arranged inside the preheating outer mold (211); the heating rod group (222) is arranged inside the shaping outer mold (221); the inner cavity of the preheating outer mold (211) is cylindrical; the inner cavity of the shaping outer mold (221) close to one end of the preheating outer mold (211) is cylindrical; The inner cavity of the mold (221) at one end away from the preheating outer mold (211) is in the shape of a square column, the fixing member (24) is arranged on the frame (1), one end of the inner mold (23) is arranged on the fixing member (24), and the other end passes through the preheating outer mold (211) and is arranged inside the shaping outer mold (221), and the inner mold (23) is structurally compatible with the inner cavity of the preheating outer mold (211) and the inner cavity of the shaping outer mold (221); The quenching correction mechanism (3) comprises a quenching outer mold (31), a correction outer mold (32), a quenching liquid pipe (33) and a collecting pipe (34); The quenching outer die (31) and the correction outer die (32) are both arranged on the frame (1); the quenching liquid pipe (33) and the collecting pipe (34) are both arranged on the quenching outer die (31); the inner cavities of the quenching outer die (31) and the correction outer die (32) are both square column-shaped; a quenching cavity (311) is provided inside the wall plate of the quenching outer die (31); the quenching liquid pipe (33) is in communication with the quenching cavity (311); the quenching cavity (311) is in communication with the inner cavity of the quenching outer die (31); and the collecting pipe (34) is in communication with the inner cavity of the quenching outer die (31); The quenching correction mechanism (3) further comprises a plurality of abutment plates (36), wherein the abutment plates (36) are arranged at the inner cavity of the quenching outer die (31); The quenching correction mechanism (3) further comprises a correction assembly (38), wherein the correction assembly (38) comprises a quenching drum (381) and a connecting pipe (382). The connecting pipe (382) is arranged inside the quenching outer mold (31), and the quenching drum (381) is arranged at the outlet end of the connecting pipe (382); The correction assembly (38) further includes a conical disk (383) and a guide ring (384); The conical disk (383) is arranged in the quenching chamber (311), the connecting tube (382) is fixedly arranged on the conical disk (383), the connecting tube (382) is a hollow structure, the quenching drum (381) is provided with a through hole, the quenching chamber (311) is connected with the inner cavity of the quenching outer mold (31) through the connecting tube (382) and the quenching drum (381), the quenching drum (381) is rotatably connected to a roller bracket (3821) at the bottom of the connecting tube (382), the roller bracket (3821) is fixedly connected to the connecting tube (382), the interior of the roller bracket (3821) is connected with the interior of the connecting tube (382), and the guide ring (384) is fixedly arranged on the quenching outer mold (31) at a position corresponding to the quenching chamber (311); The quenching chamber (311) is a conical structure, the conical disk (383) is made of elastic material, and the connecting pipe (382) is slidably disposed at the center of the guide ring (384).

2. According to claim 1, a device for preparing square tubes from round tubes based on the metal high temperature plastic deformation control mechanism, characterized in that: The quenching outer die (31) is also provided with a plurality of quenching holes (312) therein; the quenching cavity (311) is connected to the inner cavity of the quenching outer die (31) via the plurality of quenching holes (312); in a natural state, the side wall of the conical disk (383) blocks the opening of the quenching hole (312).

3. The equipment for preparing square tubes from round tubes based on the metal high temperature plastic deformation control mechanism according to claim 1 is characterized in that: The quenching correction mechanism (3) further comprises a thermal insulation plate (35), the thermal insulation plate (35) being arranged on the quenching outer die (31) and being located between the quenching outer die (31) and the shaping outer die (221), the collecting pipe (34) being arranged on the thermal insulation plate (35), and the inner cavity of the thermal insulation plate (35) being in the shape of a square column.

4. The equipment for preparing square tubes from round tubes based on the metal high temperature plastic deformation control mechanism according to claim 1 is characterized in that: The quenching correction mechanism (3) further comprises a guide die (37), wherein the guide die (37) is arranged at one end of the frame (1) close to the correction outer die (32), and the inner cavity of the guide die (37) is in the shape of a square column.

5. The equipment for preparing square tubes from round tubes based on the metal high temperature plastic deformation control mechanism according to claim 1 is characterized in that: The thermal deformation mechanism (2) further comprises an inner mould heat-insulating rod group (25), wherein the inner mould heat-insulating rod group (25) is arranged inside the inner mould (23).

6. The equipment for preparing square tubes from round tubes based on the metal high temperature plastic deformation control mechanism according to claim 1 is characterized by: It also comprises an atmosphere protection cover (4), wherein the atmosphere protection cover (4) is detachably connected to the frame (1).

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