A device and method for flame forming a profiled tube

Abstract

The application relates to the technical field of quartz product processing, and particularly provides a fire processing forming device and method for special-shaped pipe fittings, which comprises a clamping mechanism for fixing and clamping a pipe fitting to limit self-rotation of the pipe fitting, a heating mechanism configured to make circumferential relative movement around the pipe fitting axis to heat and soften the pipe fitting, a forming mechanism comprising a forming roller group, and a base capable of moving along the pipe fitting axis, wherein the heating mechanism and the forming mechanism are both installed on the base. By controlling the base to move along the pipe fitting axis, the forming roller group is brought into rolling contact with the outer wall of the softened pipe fitting and applies a radial extrusion force, so that the pipe fitting is extruded and formed into a special-shaped pipe fitting. The application fundamentally eliminates the torsional deformation caused by the rotation of the pipe fitting, and adopts external rolling extrusion instead of internal sliding forming, so that scratches on the inner wall of the product are effectively avoided, and the forming quality and the yield are improved.

Description

Technical Field

[0001] This invention relates to the field of quartz product processing technology, specifically to a fire-processing forming apparatus and method for irregularly shaped tubular fittings. Background Technology

[0002] In the processing of quartz tube products, it is often necessary to heat and soften round quartz tubes before extruding them into flat tubes and other irregularly shaped tubes. One existing technology involves clamping and rotating a round quartz tube with three-jaw chucks at both ends while simultaneously heating it with a flame. Once the quartz tube has softened, a graphite jig passing through its interior is used to expand and shape it.

[0003] In this existing solution, the tube needs to be rotated to ensure uniform heating, but the internal graphite fixture passively follows the rotation, making it difficult to maintain a completely synchronized angular velocity with the tube. This results in torsional deformation of the formed product in the circumferential direction, making it difficult to guarantee dimensional accuracy. Furthermore, relying on the graphite fixture to slide and rub against the inner wall of the tube to form the product inevitably leaves scratches and other processing marks on the inner wall of the product, affecting the appearance quality and yield rate. Summary of the Invention

[0004] To address the problems of product torsion and inner wall scratches in existing technologies, this application proposes a fire processing forming apparatus and method for irregularly shaped pipe fittings. This method eliminates the need to rotate the pipe fittings during processing and employs external rolling extrusion forming, thereby significantly improving the product forming quality.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A heat treatment forming apparatus for irregularly shaped pipe fittings includes a frame and a clamping mechanism mounted on the frame, configured to fix and clamp the pipe fitting to restrict its rotation around its own axis; a heating mechanism configured to move circumferentially relative to the axis of the pipe fitting to heat and soften it; a forming mechanism including a forming roller assembly; and a base configured to move axially along the pipe fitting; wherein the heating mechanism and the forming mechanism are both mounted on the base; by controlling the heating mechanism and the forming mechanism to move synchronously along the axial direction of the pipe fitting, the forming roller assembly of the forming mechanism rolls into contact with the outer wall of the heated and softened pipe fitting, and applies radial extrusion force to the pipe fitting to extrude and form it into an irregularly shaped pipe fitting.

[0006] The above technical solution fundamentally eliminates the torsional deformation problem caused by the asynchronous rotation of the pipe and the internal fixture by using a fixed clamping method and allowing the heating mechanism to move around the pipe. At the same time, the forming roller group rolls and squeezes the softened outer wall of the pipe, effectively avoiding scratches caused by the sliding friction of the fixture on the inner wall of the pipe, thereby greatly improving the forming effect and surface quality of the product.

[0007] Furthermore, the heating mechanism includes an annular spray gun configured to reciprocate around the axis of the pipe to heat the pipe by spraying flames. The reciprocating motion of the annular spray gun allows for uniform heating of all areas along the circumference of the pipe, replacing the traditional method of heating by rotating the pipe.

[0008] Furthermore, the heating mechanism also includes: a swing seat disposed on the base; an annular swing shaft rotatable on the top of the swing seat; a spray gun seat disposed on one side of the annular swing shaft, the annular spray gun being disposed on the spray gun seat; and a drive unit for driving the annular swing shaft to reciprocate. This structure provides a platform for the stable installation and precise swinging of the annular spray gun.

[0009] Furthermore, the top of the spray gun holder has two sets of rollers spaced apart, each set including two rollers and a roller shaft, with the two roller shafts spaced apart. The annular swing shaft is mounted on and supported by the two sets of rollers. The outer wall of the annular swing shaft has radially outwardly oriented annular protrusions that embed into the gap between the two rollers. The spray gun holder has an annular limiting groove, and the end of the roller shaft extends into the annular limiting groove. When the drive unit drives the annular swing shaft to swing, the spray gun holder and the annular spray gun on it swing together, and the roller shaft moves relative to the annular limiting groove on the spray gun holder. This structure, through the cooperation of the roller sets and the annular protrusions, achieves axial limiting of the annular swing shaft, and simultaneously, through the cooperation of the roller shaft and the annular limiting groove, achieves radial limiting, ensuring stability and safety during the swing process.

[0010] Furthermore, the drive unit includes: a ring-shaped driven gear disposed on the other side of the ring-shaped swing shaft; a driving gear disposed on the swing base and meshing with the ring-shaped driven gear; and a first motor connected to the eccentric part of the driving gear via a crank connecting rod to drive the driving gear to swing. This drive structure is simple and reliable, and can convert the circumferential rotation of the motor into the reciprocating swing of the driving gear, thereby driving the ring-shaped spray gun to achieve uniform heating at a set angle.

[0011] Furthermore, the forming roller assembly includes a first forming roller and a second forming roller arranged vertically opposite each other; the forming mechanism also includes an adjusting component for adjusting the gap between the first forming roller and the second forming roller; the adjusting component is configured to drive the first forming roller and the second forming roller to move closer or further away synchronously to keep the forming center coincident with the axis of the tube; the adjusting component is also configured to apply an elastic force to the first forming roller and / or the second forming roller to elastically compress the tube. Through the synchronous reverse movement adjustment method, it can be ensured that regardless of how the forming roller gap changes, its forming center always remains consistent with the axis of the tube, guaranteeing the accuracy of the forming dimensions; at the same time, the elastic compression design allows the forming roller to adaptively compress according to the softening degree of the tube, preventing damage caused by hard compression.

[0012] Furthermore, the adjusting assembly includes a housing and a linkage mechanism disposed inside the housing; the linkage mechanism includes a cross link and four short links. The cross link is composed of two long links intersecting, with a central shaft at the hinge center of the two links, and the central shaft is fixed to the housing; the four short links are respectively hinged to the four ends of the cross link, and are grouped in pairs, upper and lower; the two ends of the first forming roller and the second forming roller are respectively rotatably disposed at the hinge points of the upper and lower groups of short links; wherein, the second forming roller has a greater mass than the first forming roller, and under no external force, the gravity of the second forming roller causes the lower end of the cross link to move down and the upper end to move up, thereby separating the first forming roller and the second forming roller from each other. This linkage mechanism cleverly utilizes the weight difference between the two forming rollers, allowing them to automatically separate when there is no external force, facilitating the installation and unloading of the pipe fitting.

[0013] Furthermore, the adjusting assembly also includes an adjusting rod vertically mounted on the housing; a spring is sleeved on the lower end of the adjusting rod, and the spring abuts against the end of the first forming roller; the adjusting rod is configured to change the compression of the spring by moving it up and down, thereby adjusting the downward force applied by the spring to the end of the first forming roller, and thus adjusting the distance and extrusion pressure between the first forming roller and the second forming roller. By adjusting the adjusting rod, the preload of the spring can be easily changed, thereby achieving precise control of the forming pressure and gap of pipe fittings of different specifications.

[0014] Furthermore, the clamping mechanism includes a fixed clamping end and a movable clamping end. The frame is equipped with a worktable and a slide rail. The fixed clamping end is fixedly mounted on the worktable, and the movable clamping end is slidably mounted on the slide rail. The base is slidably mounted on the slide rail. The fire-processing forming device also includes a power system. The power system includes a ball screw module, a second motor, and a helical gear set. The ball screw module is mounted on the worktable. The output shaft of the second motor is linked to the ball screw via the helical gear set. The nut seat on the ball screw is connected to the base to drive the base to move horizontally along the slide rail. The cooperation between the movable and fixed ends allows for the adaptation of clamping requirements for pipes of different lengths. Simultaneously, the transmission between the helical gear set and the ball screw enables smooth and synchronous movement of the heating mechanism and the forming mechanism on the linear slide rail, ensuring continuous and uniform heating and forming processing of the pipes.

[0015] Furthermore, this invention also provides a method for heat-processing irregularly shaped tubular components, implemented based on the heat-processing apparatus for irregularly shaped tubular components described in any of the above claims. The method includes: fixing and clamping the tubular component using the clamping mechanism to restrict its rotation around its own axis; controlling the heating mechanism to perform circumferential relative movement around the axis of the tubular component to heat and soften it; controlling the heating mechanism and the forming mechanism to move synchronously along the axial direction of the tubular component, so that the forming rollers of the forming mechanism roll into contact with the outer wall of the heated and softened tubular component, and applying radial extrusion force to the tubular component to extrude and form it into an irregularly shaped tubular component. This method also achieves the dual technical effects of eliminating product torsional deformation and avoiding inner wall scratches.

[0016] Beneficial effects: This invention, by setting up a clamping mechanism to fix and hold the pipe fitting, and configuring a heating mechanism that can move circumferentially relative to the pipe fitting's axis, eliminates the need to rotate the pipe fitting during the heating process. This fundamentally avoids the torsional deformation problem caused by asynchronous rotation between the pipe fitting and any internal fixtures, ensuring the product's dimensional accuracy and shape stability. Simultaneously, this invention uses an external forming roller group to roll and extrude the softened outer wall of the pipe fitting, replacing the traditional internal sliding contact forming method. The rolling friction significantly reduces damage to the pipe fitting surface, effectively solving the problem of scratches on the inner wall of the product, and improving the product's appearance quality and yield rate. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 These are cross-sectional views of quartz round tubes and flat tubes; Figure 2 This is a three-dimensional structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of the clamping mechanism, heating mechanism, and forming mechanism of the present invention; Figure 4 This is a schematic diagram of the heating mechanism and forming mechanism of the present invention mounted on the base; Figure 5 This is a schematic diagram of the heating mechanism of the present invention; Figure 6 This is a schematic diagram of the power system of the present invention.

[0019] The annotations in the attached figures are explained as follows: Among them, A. Pipe fittings; 1. Frame; 11. Worktable; 12. Slide rail; 2. Clamping mechanism; 21. Clamping fixed end; 211. Three-jaw chuck; 212. Three-jaw chuck fixing seat; 22. Clamping movable end; 221. Sliding seat; 3. Heating mechanism; 31. First motor; 32. Motor base; 33. Swing arm; 34. Swing seat; 35. Spray gun seat; 351. Annular limiting groove; 36. Annular spray gun; 37. Roller assembly; 371. Roller shaft; 38. 381. Annular swing shaft; 39. Annular protrusion; 391. Annular driven gear; 392. Bidirectional adjusting screw; 4. Forming mechanism; 41. First forming roller; 42. Second forming roller; 43. Housing; 44. Cross connecting rod; 441. Long connecting rod; 442. Central shaft; 443. Short connecting rod; 45. Adjusting rod; 46. Spring; 5. Base; 6. Power system; 61. Ball screw module; 62. Second motor; 63. Helical gear set. Detailed Implementation

[0020] Hereinafter, exemplary embodiments according to this application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely a part of the embodiments of this application, and not all of the embodiments of this application. It should be understood that this application is not limited to the exemplary embodiments described herein. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0021] It should be noted that, as shown in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" do not specifically refer to the singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of explicitly identified steps and elements, and these steps and elements do not constitute an exclusive list; the method or apparatus may also include other steps or elements.

[0022] If the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0023] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0025] The following embodiments will be used to describe in detail the fire-processing forming apparatus and method for irregularly shaped pipe fittings of this application.

[0026] Example 1:

[0027] like Figures 1-6As shown, this embodiment provides a fire-processing forming apparatus for irregularly shaped pipe fittings. By heating and softening quartz round tubes and externally extruding them, they can be formed into flat tubes or other irregularly shaped cross-section pipe fittings. The apparatus mainly includes a frame 1, and a clamping mechanism 2, a heating mechanism 3, a forming mechanism 4, and a base 5 mounted on the frame 1. The frame 1 has a worktable 11, and the worktable 11 is equipped with a slide rail 12 for supporting and guiding the various moving parts.

[0028] The clamping mechanism 2 is configured to fix the pipe fitting A, thereby restricting its rotation around its own axis. Fixed clamping here means that once the pipe fitting is clamped, it cannot rotate around its own axis or be driven to rotate during the entire processing. This is fundamentally different from the method in the background art where the pipe body is rotated to ensure uniform heating. Specifically, the clamping mechanism 2 can be a three-jaw chuck 211 with a self-centering function, a spring chuck 46, or a V-block locking mechanism, as long as it can provide sufficient clamping force to prevent circumferential rotation of the pipe fitting. Since the pipe fitting does not rotate throughout the processing, this fundamentally eliminates the problem of torsional deformation of the pipe body caused by asynchronous clamping speeds at both ends or inconsistent internal and external speeds.

[0029] The heating mechanism 3 is configured to move circumferentially relative to the pipe fitting's axis to heat and soften it. In other words, the heating mechanism 3 is a moving component, while the pipe fitting remains stationary. The heating mechanism 3 may include one or more flame nozzles mounted on a carrier capable of rotating or reciprocating around the pipe fitting's central axis 442. By controlling the carrier's movement, the flames ejected from the nozzles can evenly sweep across all areas of the pipe fitting's circumference. For example, the heating mechanism 3 may be an annular spray gun 36 with several evenly distributed nozzles on its inner ring. The annular spray gun 36 reciprocates around the pipe fitting's axis, with the swing amplitude covering the entire circumference, thereby achieving uniform heating and softening of the pipe fitting. Alternatively, multiple independent nozzles can be evenly distributed around the circumference and rotate as a whole. This design, which replaces product movement with mechanical movement, ensures uniform heating while preventing the pipe fitting from being twisted.

[0030] The forming mechanism 4 includes a forming roller assembly. The forming roller assembly consists of a pair of rollers arranged vertically opposite each other. Forming grooves matching the outer contour of the target irregular-shaped tube are formed on the outer circumference of the rollers. The rollers are typically made of high-temperature resistant materials that do not contaminate the quartz tube, such as high-purity graphite or high-temperature resistant ceramics. During operation, the forming roller assembly directly contacts the softened outer wall of the tube, shaping it into a predetermined shape through specific pressure. Compared to the existing technology that uses a fixture inserted into the tube for sliding expansion, external roller pressing, based on line contact rolling friction, effectively avoids scratches on the inner wall of the tube.

[0031] The base 5 is configured to move along the axial direction of the pipe fitting, and both the heating mechanism 3 and the forming mechanism 4 are mounted on the base 5. The base 5 is arranged on the slide rail 12 of the frame 1 and is connected to a power drive system. When the base 5 moves along the axial direction of the pipe fitting, it moves synchronously with the heating mechanism 3 and the forming mechanism 4. The advantage of this design is that as the base 5 moves, the heating mechanism 3 can continuously heat new areas along the axial direction of the pipe fitting, and the forming rollers that follow simultaneously roll and extrude the area that has just been heated and softened. This synchronous follow-up design that integrates heating and forming can complete the processing of the entire pipe fitting in a continuous process, resulting in high production efficiency and consistent forming quality.

[0032] During operation, the clamping mechanism 2 first horizontally fixes the pipe fitting, then the heating mechanism 3 is activated to circumferentially heat the front end area of ​​the pipe fitting. After this area softens, the axial feed of the base 5 is initiated, and the forming roller group then applies radial extrusion to the softened outer wall of the pipe fitting, passively rotating under the drive of the pipe fitting, gradually transforming the pipe fitting's shape into a preset irregular cross-section. As the base 5 continues to advance forward, the heating mechanism 3 continues to soften the unprocessed pipe section in front, and the forming roller group continues to roll and form the softened pipe section behind, until the entire pipe fitting is processed. The entire process requires no rotation of the pipe fitting and no internal support fixtures, fundamentally solving the problems of torsional deformation and internal wall scratches in the product.

[0033] Example 2:

[0034] This embodiment, based on embodiment 1, provides a detailed description of the specific structure of the heating mechanism 3.

[0035] like Figures 3-5 As shown, the heating mechanism 3 includes an annular spray gun 36, which is configured to reciprocate around the axis of the pipe to heat the pipe by spraying flames. The annular spray gun 36 has two symmetrically arranged nozzles. When the annular spray gun 36 reciprocates, the two nozzles alternately heat various areas in the circumferential direction of the pipe. The oscillation angle can reach 180 degrees, thereby achieving uniform heating of the pipe from all directions. This reciprocating oscillation method replaces the traditional rotating pipe heating method, achieving uniform heating while keeping the pipe stationary.

[0036] The heating mechanism 3 also includes a swing seat 34, an annular swing shaft 38, a spray gun seat 35, and a drive unit. The swing seat 34 is mounted on the base 5, the annular swing shaft 38 rotates on the top of the swing seat 34, the spray gun seat 35 is located on one side of the annular swing shaft 38, and the annular spray gun 36 is mounted on the spray gun seat 35. The drive unit is used to drive the annular swing shaft 38 to swing back and forth, thereby causing the spray gun seat 35 and the annular spray gun 36 on it to swing together. It should be understood that all of the above structures are annular structures to facilitate the passage of the quartz tube. The spray gun seat 35, the annular swing shaft 38, and the driven gear are all open-ended, non-closed annular structures so that the quartz tube can be directly inserted into the heating mechanism 3 from top to bottom, avoiding scratches to the quartz tube during installation.

[0037] Specifically, the top of the spray gun holder 35 has two sets of rollers 37 spaced apart. Each set of rollers 37 includes two rollers and a roller shaft 371, with the two roller shafts 371 spaced apart. An annular swing shaft 38 is mounted on and supported by the two sets of rollers 37. The outer wall of the annular swing shaft 38 has an annular protrusion 381 arranged radially outward. The annular protrusion 381 is embedded in the gap between the two rollers. Through this engagement, the rollers 37 limit the axial movement of the annular swing shaft 38, preventing it from moving axially. At the same time, the spray gun holder 35 has an annular limiting groove 351, and the end of the roller shaft 371 extends into the annular limiting groove 351. Since the swing shaft is limited only in the horizontal direction by the rollers, to avoid disengagement, the roller shaft 371 can only move along the annular limiting groove 351 and cannot disengage, thus achieving radial limitation. When the drive unit drives the annular swing shaft 38 to swing, the spray gun holder 35 and the annular spray gun 36 on it swing together, and the roller shaft 371 moves relative to the annular limiting groove 351 on the spray gun holder 35. This double limiting design ensures stability and safety during the swing process.

[0038] The drive unit includes a ring driven gear 39, a driving gear 391, and a first motor 31. The ring driven gear 39 is located on the other side of the ring swing shaft 38, and the driving gear 391 is located on the swing base 34 and meshes with the ring driven gear 39. The first motor 31 is fixed to the base 5 via a motor mount 32, and its output shaft is connected to a swing arm 33. The swing arm 33 is connected to the eccentric part of the driving gear 391 via a bidirectional adjusting screw 392. The swing arm 33 and the bidirectional adjusting screw 392 together form a crank-connecting rod mechanism, with the swing arm 33 acting as a crank and the bidirectional adjusting screw 392 acting as a connecting rod. When the first motor 31 rotates, it drives the swing arm 33 to swing, which in turn drives the driving gear 391 to swing. The driving gear 391 then drives the ring driven gear 39 and the ring swing shaft 38 to reciprocate. This crank-connecting rod mechanism converts the circular rotational motion of the motor into reciprocating rotational motion, which is then transmitted to the ring spray gun 36 through gears. It has a simple and reliable structure and can achieve uniform heating at a set angle. The bidirectional adjusting screw 392 can adjust the effective length of the swing arm 33, thereby adjusting the swing angle to meet the heating requirements of different specifications of pipe fittings.

[0039] Since the heating mechanism 3 and the forming mechanism 4 are mounted on the same base 5, they can move together, thus ensuring that the relative positions of the heating area and the forming area are always consistent, ensuring the continuity and stability of the processing.

[0040] Example 3:

[0041] This embodiment describes the specific structure of the molding mechanism 4 in detail, based on embodiment 1.

[0042] like Figure 2 and Figure 3 As shown, the forming roller assembly includes a first forming roller 41 and a second forming roller 42 arranged vertically opposite each other. The forming mechanism 4 also includes an adjusting component for adjusting the gap between the first forming roller 41 and the second forming roller 42. The adjusting component is configured to drive the first forming roller 41 and the second forming roller 42 to move closer or further apart synchronously to keep the clamping center constant. This means that regardless of how the gap changes, the forming center is always aligned with the axis of the tube, ensuring the accuracy of the forming dimensions. The adjusting component is also configured to apply an elastic force to the first forming roller 41 and / or the second forming roller 42 to elastically compress the tube. This elastic compression design allows the forming rollers to adaptively compress according to the softening degree of the tube, preventing damage caused by hard compression.

[0043] The adjusting assembly has two sets, located on both sides of the forming roller assembly. The adjusting assembly includes a housing 43 and a linkage mechanism disposed inside the housing 43. The linkage mechanism includes a cross link 44 and four short links 443. The cross link 44 is composed of two long links 441 intersecting, with a central shaft 442 at the hinge center, which is fixed to the housing 43. The four short links 443 are hinged to the four ends of the cross link 44, arranged in pairs, upper and lower. The ends of the first forming roller 41 and the second forming roller 42 are rotatably positioned at the hinge points of the upper and lower sets of short links 443. The second forming roller 42 has a greater mass than the first forming roller 41. Without external force, the weight of the second forming roller 42 causes the lower end of the cross link 44 to move downwards and the upper end to move upwards, thus separating the first forming roller 41 and the second forming roller 42. This design cleverly utilizes the difference in weight, allowing them to automatically separate without external force, facilitating the installation and unloading of the pipe fitting. When processing is required, external force is applied by adjusting the components to bring them closer to the working position.

[0044] The adjustment assembly also includes an adjustment rod 45 vertically mounted on the housing 43. A spring 46 is fitted onto the lower end of the adjustment rod 45, and the spring 46 abuts against the end of the first forming roller 41. The adjustment rod 45 is configured to change the compression of the spring 46 by moving it up and down, thereby adjusting the downward force exerted by the spring 46 on the end of the first forming roller 41, and thus adjusting the gap and extrusion pressure between the first forming roller 41 and the second forming roller 42. Specifically, when the adjustment rod 45 is turned downwards, the compression of the spring 46 increases, and the downward force exerted on the first forming roller 41 also increases, forcing the first forming roller 41 to move downwards. Simultaneously, the second forming roller 42 is moved upwards via a linkage mechanism, reducing the gap between the two and increasing the extrusion pressure. Conversely, when the adjustment rod 45 is turned upwards, the compression of the spring 46 decreases, and the extrusion pressure decreases accordingly. In this way, the preload of the spring 46 can be easily changed, thereby achieving precise control of the forming pressure and gap for pipe fittings of different specifications. When the forming roller has no power input, and there is relative displacement between the product and the forming roller, the friction between them is rolling friction. This method can effectively reduce the generation of processing scratches.

[0045] Example 4:

[0046] This embodiment, based on embodiment 1, provides a detailed description of the specific structure of the clamping mechanism 2 and the power system 6.

[0047] like Figure 1 and Figure 2As shown, the clamping mechanism 2 includes a fixed clamping end 21 and a movable clamping end 22. A worktable 11 and two slide rails 12 located on the worktable 11 are provided on the frame 1. The fixed clamping end 21 is fixedly mounted on the worktable 11, and the movable clamping end 22 is slidably mounted on the slide rails 12. The fixed clamping end 21 consists of a three-jaw chuck 211 and a three-jaw chuck 211 fixing seat. The three-jaw chuck 211 fixing seat is fixed to the worktable 11, and the three-jaw chuck 211 is mounted on the fixing seat and cannot rotate; it is only used to clamp one end of the product. The movable clamping end 22 has the same structure as the fixed clamping end 21, except that it is slidably mounted. The bottom of the movable clamping end 22 is slidably mounted on the two slide rails 12 via a sliding seat 221, making its relative distance to the fixed end adjustable, thus accommodating products of different lengths and specifications. The movable clamping end 22 is also designed with a fixing structure to allow it to stop stably in the desired position.

[0048] The heat treatment forming apparatus also includes a power system 6. The power system 6 includes a ball screw module 61, a second motor 62, and a helical gear set 63. The ball screw module 61 is mounted on the worktable 11 and located between two slide rails 12. The output shaft of the second motor 62 is linked to the ball screw via the helical gear set 63. The nut seat on the ball screw is connected to the base 5 to drive the base 5 to move horizontally along the slide rail 12. Specifically, the second motor 62 transmits power to the ball screw through two helical gears. The ball screw rotates, driving the base 5 to move horizontally on the linear slide rail 12, thereby achieving synchronous movement of the forming mechanism 4 and the heating mechanism 3. The transmission method of the helical gear set 63 has the advantages of smooth transmission and high load-bearing capacity, ensuring the smoothness and accuracy of the base 5's movement. The forming mechanism 4 and the heating mechanism 3 are connected to the frame 1 via linear slide rails 12 below, enabling the entire mechanism to move. The power for movement is provided by the ball screw below.

[0049] Example 5:

[0050] This embodiment provides a method for heat treatment forming of irregularly shaped tubular components, implemented based on the heat treatment forming apparatus for irregularly shaped tubular components described in any of the foregoing embodiments. The method includes the following steps: First, the pipe fitting is fixed and clamped by the clamping mechanism 2 to restrict its rotation around its own axis. Specifically, the quartz tube is placed horizontally between the fixed clamping end 21 and the movable clamping end 22. The position of the movable clamping end 22 is adjusted to fit the length of the pipe fitting, and then the pipe fitting is clamped and fixed by the three-jaw chucks 211 at both ends. Throughout the entire processing, the pipe fitting remains stationary and does not undergo any circumferential rotation.

[0051] Secondly, the heating mechanism 3 is controlled to move circumferentially around the axis of the pipe to heat and soften it. Specifically, the first motor 31 is started, which drives the driving gear 391 to swing through the crank-connecting rod mechanism, thereby driving the annular driven gear 39 and the annular swing shaft 38 to swing back and forth, causing the annular spray gun 36 to swing back and forth 180 degrees around the axis of the pipe. The two symmetrically arranged nozzles alternately heat various areas in the circumferential direction of the pipe until the quartz tube in that area reaches the softening temperature.

[0052] Finally, the heating mechanism 3 and the forming mechanism 4 are controlled to move synchronously along the axial direction of the pipe, so that the forming rollers of the forming mechanism 4 roll into contact with the outer wall of the softened pipe and apply radial extrusion force to the pipe to extrude and form it into a special-shaped pipe. Specifically, the second motor 62 is started, which drives the ball screw to rotate through the helical gear set 63, thereby driving the base 5 to move horizontally along the slide rail 12. The heating mechanism 3 and the forming mechanism 4 on the base 5 move synchronously. The heating mechanism 3 continuously heats and softens the unprocessed pipe section in front, while the forming rollers roll and extrude the softened pipe section behind. The first forming roller 41 and the second forming roller 42 of the forming roller set apply elastic extrusion force to the pipe under the action of the spring 46. As the base 5 continues to feed, the entire pipe is continuously processed into the required special-shaped cross-section.

[0053] Using the above method, the pipe remains stationary throughout the entire processing. The heating mechanism 3 achieves uniform heating through reciprocating oscillation, and the forming roller group achieves forming through external rolling extrusion. The entire process does not require rotating the pipe or any internal support fixtures, fundamentally eliminating the problems of product torsion deformation and inner wall scratches, and significantly improving the product yield and appearance quality.

[0054] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention, such as changing the oscillation mode of the heating mechanism, the number of forming rollers, or the specific elastic element of the adjusting assembly, should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A heat treatment forming apparatus for irregularly shaped tubular fittings, characterized in that, Includes the rack (1) and the components mounted on the rack (1). The clamping mechanism (2) is configured to clamp the pipe fitting in a fixed manner to restrict the pipe fitting from rotating about its own axis; The heating mechanism (3) is configured to move circumferentially relative to the axis of the pipe to heat the pipe and soften it; The forming mechanism (4) includes a forming roller assembly; and base (5), configured to move axially along the tube; The heating mechanism (3) and the forming mechanism (4) are both mounted on the base (5). By controlling the heating mechanism (3) and the forming mechanism (4) to move synchronously along the axial direction of the pipe, the forming roller group of the forming mechanism (4) rolls into contact with the outer wall of the heated and softened pipe and applies radial extrusion force to the pipe so that the pipe is extruded into a shaped pipe.

2. The heat treatment forming apparatus for irregularly shaped pipe fittings according to claim 1, characterized in that, The heating mechanism (3) includes an annular spray gun (36) configured to reciprocate around the axis of the pipe to heat the pipe by spraying flames.

3. The heat treatment forming apparatus for irregularly shaped pipe fittings according to claim 2, characterized in that, The heating mechanism (3) further includes: A swing seat (34) is disposed on the base (5); The annular swing shaft (38) rotates at the top of the swing seat (34); A spray gun holder (35) is disposed on one side of the annular swing shaft (38), and the annular spray gun (36) is disposed on the spray gun holder (35); And a drive unit for driving the annular swing shaft (38) to swing back and forth.

4. The heat treatment forming apparatus for irregularly shaped pipe fittings according to claim 3, characterized in that, The top of the spray gun holder (35) has two sets of rollers (37) spaced apart. Each set of rollers (37) includes two rollers and a roller shaft (371), and the two roller shafts (371) are spaced apart. The annular swing shaft (38) is mounted on two sets of rollers (37) and supported by the two sets of rollers (37); The outer wall of the annular swing shaft (38) has an annular protrusion (381) arranged radially outward, and the annular protrusion (381) is embedded in the gap between the two rollers; The spray gun holder (35) is provided with an annular limiting groove (351), and the end of the roller shaft (371) extends into the annular limiting groove (351). When the drive unit drives the annular swing shaft (38) to swing, the spray gun seat (35) and the annular spray gun (36) on it swing together, and the roller shaft (371) moves relative to the annular limiting groove (351) on the spray gun seat (35).

5. The heat treatment forming apparatus for irregularly shaped pipe fittings according to claim 4, characterized in that, The drive unit includes: An annular driven gear (39) is disposed on the other side of the annular swing shaft (38); The driving gear (391) is disposed on the swing seat (34) and meshes with the ring driven gear (39); And the first motor (31) is connected to the eccentric part of the drive gear (391) via a crank connecting rod to drive the drive gear (391) to swing.

6. The heat treatment forming apparatus for irregularly shaped pipe fittings according to claim 1, characterized in that, The forming roller group includes a first forming roller (41) and a second forming roller (42) arranged opposite to each other; the forming mechanism (4) also includes an adjusting component for adjusting the gap between the first forming roller (41) and the second forming roller (42); The adjustment component is configured to drive the first forming roller (41) and the second forming roller (42) to move closer or further away synchronously, so as to keep the forming center coincident with the axis of the tube. The adjustment assembly is further configured to apply an elastic force to the first forming roller (41) and / or the second forming roller (42) to elastically compress the tube.

7. The heat treatment forming apparatus for irregularly shaped pipe fittings according to claim 6, characterized in that, The adjustment assembly includes a housing (43) and a linkage mechanism disposed inside the housing (43); The linkage mechanism includes a cross link (44) and four short links (443). The cross link (44) is composed of two long links (441) crossing each other. A central shaft (442) is provided at the hinge center of the two links. The central shaft (442) is fixed on the outer shell (43). The four short connecting rods (443) are respectively hinged to the four ends of the cross connecting rod (44), and are grouped in pairs, one above the other. The two ends of the first forming roller (41) and the second forming roller (42) are respectively rotatably set at the hinge of the upper and lower sets of short connecting rods (443); The second forming roller (42) has a greater mass than the first forming roller (41). When not subjected to external force, the gravity of the second forming roller (42) causes the lower end of the cross link (44) to move down and the upper end to move up, so that the first forming roller (41) and the second forming roller (42) can be separated from each other.

8. The heat treatment forming apparatus for irregularly shaped tubular fittings according to claim 7, characterized in that, The adjustment assembly also includes an adjustment rod (45) vertically disposed on the housing (43); A spring (46) is sleeved on the lower end of the adjusting rod (45), and the spring (46) abuts against the end of the first forming roller (41); The adjusting rod (45) is configured to change the compression of the spring (46) by moving it up and down, so as to adjust the downward force applied by the spring (46) to the end of the first forming roller (41), thereby adjusting the distance and extrusion force between the first forming roller (41) and the second forming roller (42).

9. The heat treatment forming apparatus for irregularly shaped pipe fittings according to claim 1, characterized in that, The clamping mechanism (2) includes a clamping fixed end (21) and a clamping movable end (22), and the frame (1) is provided with a worktable (11) and a slide rail (12). The clamping fixed end (21) is fixedly disposed on the worktable (11), and the clamping movable end (22) is slidably disposed on the slide rail (12); The base (5) is slidably mounted on the slide rail (12); the fire processing forming device also includes a power system (6); The power system (6) includes a ball screw module (61), a second motor (62), and a helical gear set (63). The ball screw module (61) is mounted on the worktable (11). The output shaft of the second motor (62) is linked to the ball screw through the helical gear set (63). The nut seat on the ball screw is connected to the base (5) to drive the base (5) to move horizontally along the slide rail (12).

10. A method for heat-processing irregular-shaped pipe fittings, implemented using the heat-processing apparatus for irregular-shaped pipe fittings as described in any one of claims 1 to 9, characterized in that, The method includes: The clamping mechanism (2) is used to fix and clamp the pipe fitting, thereby restricting the pipe fitting from rotating around its own axis; Control the heating mechanism (3) to make circumferential relative movement around the axis of the pipe to heat and soften the pipe; The heating mechanism (3) and the forming mechanism (4) are controlled to move synchronously along the axial direction of the pipe, so that the forming roller group of the forming mechanism (4) rolls into contact with the outer wall of the heated and softened pipe, and applies radial extrusion force to the pipe so that the pipe is extruded into a shaped pipe.

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