Sealing and welding equipment and welding methods

Abstract

This application relates to a sealing welding device and a welding method. The sealing welding device is used to seal pipes encased in powder metallurgy components. The sealing welding device includes a heating component and a welding component. The heating component provides the temperature and heat required for welding the pipe. The welding component includes a first base, a first welding plate, a second welding plate, and a first driving component. The first driving component is connected to the second welding plate to drive the second welding plate to move towards the first welding plate. The first welding plate has a first welding portion, and the second welding plate has a second welding portion. The first and second welding portions are adapted to and can be engaged. The extension directions of the first and second welding portions are arranged at an angle to the axial direction of the pipe. During welding, the heated pipe is placed between the first and second welding plates. The first and second welding plates flatten the pipe before welding. The first and second welding portions increase the local stress on the pipe while reducing the number of welding passes, ensuring the reliability of the weld.

Description

Technical Field

[0001] This application relates to the field of hot isostatic pressing welding technology, and in particular to a sealing welding device and welding method. Background Technology

[0002] Hot isostatic pressing (HIP) technology has been extensively studied both domestically and internationally, involving materials such as high-temperature alloys, titanium alloys, and mold steels. HIP of metal powders can produce structural components with complex shapes, high material utilization, and uniform microstructure, and is widely used in aerospace and rocket engine parts.

[0003] Hot isostatic pressing (HIP) is a technique for sintering metal powders, typically requiring the use of a cladding system to assist in the sintering process. Simultaneously, the cladding system must maintain excellent sealing, and an extremely high vacuum must be ensured within it to guarantee low oxygen content in the sintered part. Generally, after powder filling, the vacuum tube or powder delivery tube of the metal cladding needs to be sealed by welding. The reliability of this sealing is crucial in determining the oxygen content and performance of the entire powder-coated part.

[0004] Currently, the main welding method used in existing technologies is as follows: First, a vacuum pump unit is used to directly degas the casing. After the metal powder is filled, the powder supply pipe and degassing pipe of the metal casing are heated and then clamped shut. That is, pressure is applied to the heated powder supply pipe and degassing pipe, causing the pipes to be flattened and welded together, thus achieving the purpose of sealing the vacuum casing. Currently, this method usually involves manually heating the pipes and sealing them with clamps, which results in a large number of clamping operations, making it difficult to guarantee welding reliability and increasing the risk of leakage. Summary of the Invention

[0005] The purpose of this application is to provide a sealing welding device and welding method, which can improve the welding effect of the under-coating powder pipe and / or degassing pipe of hot isostatic pressing parts, but not limited to other powder metallurgy parts, and avoid leakage.

[0006] To this end, in a first aspect, embodiments of this application provide a sealing welding device for sealing a pipe of a powder metallurgy component enclosure, the pipe including a powder discharge pipe and / or a degassing pipe, characterized in that the sealing welding device includes: a heating component for providing the temperature and heat required for welding the pipe; and a welding component including a first base and a first welding plate, a second welding plate and a first driving member disposed on the first base, the output end of the first driving member being connected to the second welding plate to drive the second welding plate to move toward the first welding plate, thereby clamping and welding the pipe located between the first welding plate and the second welding plate, the first welding plate having a first welding portion on the side facing the second welding plate, the second welding plate having a second welding portion on the side facing the first welding plate, the first welding portion and the second welding portion being adapted and interlocking, the extension directions of the first welding portion and the second welding portion being arranged at an angle to the axial direction of the pipe.

[0007] In one possible implementation, the first weld portion includes a first protrusion and a first groove arranged crosswise along the axial direction of the pipe, and the second weld portion includes a second groove and a second protrusion arranged crosswise along the axial direction of the pipe, wherein the second groove is adapted to the first protrusion and the first groove is adapted to the second protrusion.

[0008] In one possible implementation, the first welding plate has a first limiting portion protruding from both sides along the extension direction of the first welding portion, and the second welding plate has a second limiting portion protruding from both sides along the extension direction of the second welding portion, wherein the first limiting portion is used to abut against the second limiting portion.

[0009] In one possible implementation, the sum of the thicknesses of the first limiting part and the second limiting part is a first distance, and the thickness of the pipe is a second distance, wherein the first distance is greater than the second distance but less than twice the second distance.

[0010] In one possible implementation, the first welding plate is detachably connected to the first base via a first fixing frame, and the second welding plate is detachably connected to the first driving member via a second fixing frame. Either the first fixing frame or the second fixing frame is provided with a sleeve, and the other is provided with a guide rod that extends into the sleeve and is slidably connected to the sleeve.

[0011] In one possible implementation, the heating component includes an induction coil, and / or the induction coil is an open induction coil arranged in an arc shape, the opening of the induction coil facilitating the insertion or extension of the pipe.

[0012] In one possible implementation, a cutting assembly is also included, which includes a cutter and a second drive member, the output of which is connected to the cutter to drive the cutter to cut off the excess pipe after welding.

[0013] In one possible implementation, the system further includes a pressure plate and a first sliding assembly disposed on the pressure plate. The first sliding assembly includes: a support fixing seat disposed on the pressure plate; a screw threadedly connected to the support fixing seat; a bracket threadedly connected to the screw; and a mounting plate connected to the bracket. At least three first sliding assemblies are provided, and the mounting plates of the three first sliding assemblies are respectively connected to the heating assembly, the welding assembly, and the cutting assembly to drive the heating assembly, the welding assembly, or the cutting assembly to extend out of the pressure plate.

[0014] In one possible implementation, a second sliding assembly is further included. The second sliding assembly includes a third driving member, a first rotating wheel, a second rotating wheel, a conveyor belt, a support guide rail, and a slider. The conveyor belt is sleeved on the first and second rotating wheels. The third driving member is used to drive the first and second rotating wheels to rotate, thereby driving the conveyor belt to rotate. The rotation direction of the conveyor belt is perpendicular to the sliding direction of the first sliding assembly. The pressure plate is connected to the conveyor belt. The support guide rail is slidably connected to the slider. The sliding direction of the slider is the same as the rotation direction of the conveyor belt. The pressure plate is also connected to the slider.

[0015] Secondly, this application provides a welding method for a sealing welding device, comprising: heating a pipe at a heating component to bring the pipe to a preset temperature; moving the heated pipe between a first welding plate and a second welding plate of a welding component; a first driving member driving the second welding plate toward the first welding plate to flatten the pipe before welding; and engaging the first welding portion and the second welding portion to increase the local stress of the pipe and improve the welding effect of the pipe.

[0016] According to the sealing welding equipment and welding method provided in the embodiments of this application, the sealing welding equipment is used to seal the pipeline of a powder metallurgy component enclosure. The pipeline includes a powder supply pipe and / or a degassing pipe. The sealing welding equipment includes a heating component and a welding component. The heating component is used to provide the temperature and heat required for welding the pipeline. The welding component includes a first base, a first welding plate, a second welding plate, and a first driving component. The first driving component is connected to the second welding plate to drive the second welding plate to move towards the first welding plate. The first welding plate is provided with a first welding part, and the second welding plate is provided with a second welding part. The first welding part and the second welding part are adapted to and can be engaged. The extension directions of the first welding part and the second welding part are set at an angle to the axial direction of the pipeline. During welding, the heated pipeline is placed between the first welding plate and the second welding plate. The first welding plate and the second welding plate flatten the pipeline before welding. The first welding part and the second welding part increase the local stress of the pipeline, improve the welding effect, reduce the number of welding passes, ensure the reliability of the welding, and avoid leakage. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0018] 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, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0020] Figure 1 This diagram illustrates the structure of a sealing and welding device according to an embodiment of this application.

[0021] Figure 2 This illustration shows a structural schematic diagram of a welding assembly provided in an embodiment of this application;

[0022] Figure 3 This illustration shows a cross-sectional view of a welding assembly provided in an embodiment of this application;

[0023] Figure 4 This diagram illustrates a first welding plate and a second welding plate clamping a pipe according to an embodiment of this application.

[0024] Figure 5This diagram illustrates a welding pipe using a first welding plate and a second welding plate, as provided in an embodiment of this application.

[0025] Figure 6 This illustration shows a structural schematic diagram of a cutting assembly provided in an embodiment of this application;

[0026] Figure 7 This diagram illustrates the structure of a first sliding component according to an embodiment of this application.

[0027] Figure 8 This illustration shows a structural schematic diagram of a second sliding component provided in an embodiment of this application;

[0028] Figure 9 This image shows a metallographic structure of a welded pipe cross-section according to an embodiment of this application.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Pipeline; 2. Heating component; 21. Induction coil; 22. Induction power supply; 3. Welding component; 31. First base; 32. First welding plate; 321. First welding part; 3211. First protrusion; 3212. First groove; 322. First limiting part; 323. First fixing frame; 33. Second welding plate; 331. Second welding part; 3311. Second groove; 3312. Second protrusion; 332. Second limiting part; 333. Second fixing frame; 34. First driving component; 35. Sleeve; 36. Guide rod; 37. Positioning component; 38. Positioning hole; 4. Cutting assembly; 41. Cutter; 42. Second base; 43. Cutter holder; 5. Pressure plate; 6. First sliding assembly; 61. Bracket; 62. Screw; 64. Support fixing seat; 65. Mounting plate; 7. Second sliding assembly; 71. Third driving component; 72. First rotating wheel; 73. Second rotating wheel; 74. Conveyor belt; 75. Support guide rail; 76. Slider. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0033] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0034] Figure 1 This diagram illustrates the structure of a sealing and welding device according to an embodiment of this application. Figure 2 This illustration shows a structural schematic diagram of a welding assembly provided in an embodiment of this application. Figure 3 This illustration shows a cross-sectional view of a welding assembly provided in an embodiment of this application. Figure 4 This diagram illustrates a first welding plate and a second welding plate clamping a pipe according to an embodiment of this application. Figure 5 This diagram illustrates a welding pipe using a first welding plate and a second welding plate, as provided in an embodiment of this application.

[0035] like Figures 1 to 5As shown in the figure, this application provides a sealing welding device for sealing a pipe 1 with a powder metallurgy sheath. The pipe 1 includes a powder discharge pipe and / or a degassing pipe. The sealing welding device includes a heating component 2 and a welding component 3. The heating component 2 is used to provide the temperature and heat required for welding the pipe 1. The welding component 3 includes a first base 31 and a first welding plate 32, a second welding plate 33 and a first driving member 34 disposed on the first base 31. The output end of the first driving member 34 is connected to the second welding plate 33 to drive the second welding plate 33 to move toward the first welding plate 32, thereby clamping and welding the pipe 1 located between the first welding plate 32 and the second welding plate 33. The first welding plate 32 is provided with a first welding part 321 on the side facing the second welding plate 33, and the second welding plate 33 is provided with a second welding part 331 on the side facing the first welding plate 32. The first welding part 321 and the second welding part 331 are adapted to each other and can be engaged. The extension directions of the first welding part 321 and the second welding part 331 are set at an angle θ with the axial direction of the pipe 1, where 45°≤θ≤90°.

[0036] It should be understood that the cladding is provided with a pipe 1, which includes a powder feeding pipe and / or a degassing pipe. The powder feeding pipe is used to load metal powder into the cladding, and the degassing pipe is used to evacuate the cladding, thereby creating an extremely high vacuum inside the cladding to ensure a low oxygen content in the sintered parts.

[0037] The sealing welding equipment includes a heating component 2, which is used to raise the temperature of the pipe 1 so that the temperature of the pipe 1 reaches the temperature that can be welded. The specific temperature is selected according to the material of the pipe 1. For example, if the pipe 1 is made of stainless steel, the temperature of the pipe 1 needs to be raised to 1100℃ in order to facilitate welding later.

[0038] The welding assembly 3 includes a first base 31, a first welding plate 32, a second welding plate 33, and a first driving component 34. The first base 31 is provided with a welding groove. The first welding plate 32 is located in the welding groove and connected to the first base 31. The first welding plate 32 can be fixedly connected to the first base 31, threadedly connected, or connected in other ways. The first driving component 34 can be a cylinder, hydraulic cylinder, or other driving component, and the first driving component 34 is fixed to the first base 31. In one example, the first driving component 34 is a hydraulic cylinder. The second welding plate 33 is connected to the output end of the first driving component 34 and is located in the welding groove. The welding surface of the second welding plate 33 faces the first welding plate 32, and the welding surface of the first welding plate 32 faces the second welding plate 33.

[0039] During welding, the heated pipe 1 is placed between the first welding plate 32 and the second welding plate 33. Then, the first driving component 34 drives the second welding plate 33 to move toward the first welding plate 32, so that the first welding plate 32 and the second welding plate 33 clamp the pipe 1 and weld it. Under normal circumstances, the pipe 1 needs to be pressure held for 20-30 seconds to seal the pipe 1.

[0040] Furthermore, the first welding plate 32 has a first welding portion 321 on the side facing the second welding plate 33, and the second welding plate 33 has a second welding portion 331 on the side facing the first welding plate 32. The first welding portion 321 and the second welding portion 331 are adapted to and can engage. The first welding portion 321 can be a protrusion, and the second welding portion 331 can be a groove adapted to the protrusion; alternatively, the first welding portion 321 can be a groove, and the second welding portion 331 can be a protrusion adapted to the groove. When the first welding plate 32 and the second welding plate 33 abut against each other, the second welding portion 331 causes the pipe 1 to extend into the first welding portion 321. The arrangement of the first welding portion 321 and the second welding portion 331 increases the local stress in the pipe, thereby enhancing the welding sealing effect of the pipe 1.

[0041] In this embodiment, the extension directions of the first welding part 321 and the second welding part 331 are set at an angle θ with the axial direction of the pipe 1. The angle can be 45°, 60°, 75° or 90°, etc. In one example, the extension directions of the first welding part 321 and the second welding part 331 are perpendicular to the axial direction of the pipe 1. Compared with the extension directions of the first welding part 321 and the second welding part 331 being parallel to the axial direction of the pipe 1, this application avoids the probability of gaps appearing at the weld of the pipe 1. The setting of this application further improves the sealing performance and stability of the sidewall welding of the pipe 1.

[0042] The first welding part 321 of this application may have multiple protrusions or grooves arranged at intervals along the axial direction of the pipe 1. At the same time, the second welding part 331 also has multiple corresponding grooves or protrusions arranged at intervals along the axial direction of the pipe 1. The arrangement of multiple protrusions and grooves can reduce the number of sealing welds and ensure the reliability of the weld.

[0043] In some alternative embodiments, the first weld portion 321 includes a first protrusion 3211 and a first groove 3212 arranged crosswise along the axial direction of the pipe, and the second weld portion 331 includes a second groove 3311 and a second protrusion 3312 arranged crosswise along the axial direction of the pipe 1, wherein the second groove 3311 is adapted to the first protrusion 3211 and the first groove 3212 is adapted to the second protrusion 3312.

[0044] During welding, the first welding plate 32 abuts against the second welding plate 33, the first protrusion 3211 drives the pipe 1 to extend into the second groove 3311, and the second protrusion 3312 drives the pipe 1 to extend into the first groove 3212, so that the pipe 1 is cross-clamped along the axial direction, further ensuring the sealing effect of the pipe 1.

[0045] In some alternative embodiments, the width of the first protrusion 3211 toward the second welding plate 33 gradually decreases, and the second groove 3311 is adapted to the first protrusion 3211 so that the first protrusion 3211 extends into the second groove 3311. The width of the second protrusion 3312 toward the first welding plate 32 gradually decreases, and the first groove 3212 is adapted to the second protrusion 3312 so that the second protrusion 3312 extends into the first groove 3212.

[0046] In some optional embodiments, the first welding plate 32 has a first limiting portion 322 protruding on both sides along the extension direction of the first welding portion 321, and the second welding plate 33 has a second limiting portion 332 protruding on both sides along the extension direction of the second welding portion 331, and the first limiting portion 322 is used to abut against the second limiting portion 332.

[0047] When the first welding plate 32 and the second welding plate 33 are welded to the pipe 1, the first limiting part 322 and the second limiting part 332 abut against each other, thereby avoiding excessive jamming of the first welding part 321 and the second welding part 331, and avoiding the risk of leakage due to the pipe 1 being clamped and broken.

[0048] In some optional embodiments, the sum of the thicknesses of the first limiting portion 322 and the second limiting portion 332 is a first distance D, and the thickness of the pipe 1 is a second distance L. The first distance D is greater than the second distance L but less than twice the second distance L. That is, when the pipe 1 is flattened and welded by the first welding plate 32 and the second welding plate 33, the pipe 1 gradually undergoes diffusion welding, and the thickness of the pipe 1 decreases, further improving the sealing performance of the pipe 1. However, the reduction in the thickness of the pipe 1 is small, avoiding the pipe 1 from being pinched off. When the first distance D is less than the second distance L, the pipe 1 is easily pinched off, which may lead to the rupture of the sealed pipe 1 and the risk of vacuum leakage. When the first distance D is greater than twice the second distance L, the sealing effect of the pipe 1 is poor. In one example, the first distance D is 2.6 mm and the second distance L is 1.5 mm.

[0049] In some optional embodiments, the first welding plate 32 is detachably connected to the first base 31 via a first fixing frame 323. The first fixing frame 323 can be bolted to the first base 31, and the first fixing frame 323 and the first welding plate 32 can also be bolted together. The second welding plate 33 is detachably connected to the first driving member 34 via a second fixing frame 333. The second fixing frame 333 can be bolted to the first base 31, and the second fixing frame 333 and the second welding plate 33 can also be bolted together.

[0050] Either the first fixing frame 323 or the second fixing frame 333 is provided with a sleeve 35, and the other is provided with a guide rod 36 that extends into the sleeve 35 and is slidably connected to the sleeve 35. The guide rod 36 extends into the sleeve 35 and is slidably connected to the sleeve 35.

[0051] In one example, sleeve 35 is fixedly connected to first fixing bracket 323, such as by integral molding or welding, and guide rod 36 is fixedly connected to second fixing bracket 333, such as by integral molding or welding.

[0052] The guide rod 36 and sleeve 35 are designed to accurately position the first welding plate 32 and the second welding plate 33, thereby improving the precision of the engagement of the first welding part 321 and the second welding part 331.

[0053] In some optional embodiments, either the first welding plate 32 or the second welding plate 33 is provided with a positioning member 37, and the other is provided with a positioning hole 38. When the first welding part 321 and the second welding part 331 are engaged, the positioning member 37 extends into the positioning hole 38. The positioning member 37 and the positioning hole 38 further improve the accuracy of the engagement between the first welding part 321 and the second welding part 331.

[0054] In some alternative embodiments, the heating component 2 includes an induction coil 21, and / or the induction coil 21 is an open induction coil arranged in an arc shape, with the opening of the induction coil 21 facilitating the insertion or extension of the pipe 1.

[0055] The heating assembly 2 includes an induction coil 21 and an induction power supply 22, with the induction coil 21 located at the induction power supply 22. During operation, the pipe 1 is located within the induction coil 21, thereby heating the pipe 1. The induction coil 21 may be arranged in a ring shape.

[0056] Furthermore, in order to facilitate the insertion or extension of the pipe 1 into or out of the induction coil 21, the induction coil 21 is an open-type induction coil with an arc shape.

[0057] Reference Figure 6 , Figure 6 This diagram illustrates the structure of a cutting assembly according to an embodiment of this application. In some optional embodiments, it further includes a cutting assembly 4, which includes a cutter 41 and a second driving member. The output end of the second driving member is connected to the cutter 41 to drive the cutter 41 to cut off the excess pipe 1 after welding.

[0058] The cutting assembly 4 also includes a second base 42 and a cutter holder 43. The second base 42 is provided with a cutting groove. A second drive member is connected to the second base 42, and the output end of the second drive member extends into the cutting groove and connects to the cutter 41. The cutter 41 is located in the cutting groove, and the cutter holder 43 is also located in the cutting groove and connected to the second base 42. The cutter holder 43 has a cutting edge adapted to the cutter 41. During cutting, the pipe 1 is placed in the cutting groove, and the second drive member drives the cutter 41 to move towards the cutter holder 43, thereby cutting the pipe 1. After the pipe 1 is cut, the cutter 41 enters the cutting edge, thereby avoiding damage caused by the collision between the cutter 41 and the cutter holder 43.

[0059] Reference Figure 7 , Figure 7 This diagram illustrates the structure of a first sliding component provided in an embodiment of this application.

[0060] In some optional embodiments, the system further includes a pressure plate 5 and a first sliding assembly 6 disposed on the pressure plate 5. The first sliding assembly 6 includes a bracket 61, a screw 62, a support fixing seat 64, and a mounting plate 65. The support fixing seat 64 is disposed on the pressure plate 5, the screw 62 is threadedly connected to the support fixing seat 64, the bracket 61 is threadedly connected to the screw 62, and the mounting plate 65 is connected to the bracket 61. At least three first sliding assemblies 6 are provided, and the mounting plates 65 of the three first sliding assemblies 6 are respectively connected to the heating assembly 2, the welding assembly 3, and the cutting assembly 4 to drive the heating assembly 2, the welding assembly 3, or the cutting assembly 4 to extend out of the pressure plate 5.

[0061] The pressure plate 5 is a single plate, and the support fixing seat 64 is fixedly connected to the pressure plate 5. When the screw 62 rotates relative to the support fixing seat 64, the screw 62 moves relative to the support fixing seat 64 along its own length direction, thereby driving the bracket 61 to move along the length direction of the screw 62. The bracket 61 drives the mounting plate 65 to move along the length direction of the screw 62.

[0062] At least three first sliding components 6 are provided in this application. These three first sliding components 6 are arranged along the length of the pressure plate 5, and their mounting plates 65 are respectively connected to the heating component 2, the welding component 3, and the cutting component 4 to drive the heating component 2, the welding component 3, or the cutting component 4 out of the pressure plate 5. When the pipe 1 needs to be heated, the mounting plate 65 of the first sliding component 6 connected to the heating component 2 slides, causing the heating component 2 to extend out of the pressure plate 5 to heat the pipe 1. When the pipe 1 needs to be welded, the mounting plate 65 of the first sliding component 6 connected to the welding component 3 slides, causing the welding component 3 to extend out of the pressure plate 5 to weld the pipe 1. When the pipe 1 needs to be cut, the mounting plate 65 of the first sliding component 6 connected to the cutting component 4 slides, causing the cutting component 4 to extend out of the pressure plate 5.

[0063] Reference Figures 1-8 , Figure 8 This diagram illustrates the structure of a second sliding assembly according to an embodiment of this application. In some optional embodiments, it further includes a second sliding assembly 7, which includes a third driving member 71, a first rotating wheel 72, a second rotating wheel 73, and a conveyor belt 74. The conveyor belt 74 is sleeved on the first rotating wheel 72 and the second rotating wheel 73. The third driving member 71 drives the first rotating wheel 72 and the second rotating wheel 73 to rotate, thereby driving the conveyor belt 74 to rotate. The rotation direction of the conveyor belt 74 is perpendicular to the sliding direction of the first sliding assembly 6. The pressure plate 5 is connected to the conveyor belt 74.

[0064] The second sliding assembly 7 includes a third driving member 71, which is a motor. The output end of the third driving member 71 is provided with a driving wheel. The first rotating wheel 72 passes through the first rotating shaft and is connected to a driven wheel. A belt is fitted over the driving wheel and the driven wheel. That is, when the third driving member 71 drives the driving wheel to rotate, it drives the belt to rotate. The rotation of the belt drives the driven wheel to rotate. The rotation of the driven wheel drives the first rotating shaft to rotate. The rotation of the first rotating shaft drives the first rotating wheel 72 to rotate. There are two first rotating wheels 72, which are located at the two ends of the first rotating shaft respectively.

[0065] The second sliding assembly 7 also includes a second rotating shaft. Two second rotating wheels 73 are provided and located at both ends of the second rotating shaft. Two conveyor belts 74 are also provided, with one first rotating wheel 72 and one second rotating wheel 73 mounted on each conveyor belt 74. When the first rotating wheel 72 moves, it drives the conveyor belt 74 to move, and the movement of the conveyor belt 74 drives the second rotating wheel 73 to move.

[0066] Since the pressure plate 5 is connected to the conveyor belt 74, the pressure plate 5 can be connected to two conveyor belts 74. When the conveyor belt 74 moves, the pressure plate 5 moves with the conveyor belt 74. The rotation direction of the conveyor belt 74 is perpendicular to the sliding direction of the first sliding component 6, and the rotation direction of the conveyor belt 74 is parallel to the length direction of the pressure plate 5. In use, the sheath containing pipe 1 remains stationary. The third drive unit 71 drives the conveyor belt 74 to move, first moving the heating component 2 to pipe 1. The first sliding component 6 moves the heating component 2 out of the pressure plate 5 and acts on pipe 1, thereby increasing the temperature of pipe 1. After heating is completed, the third drive unit 71 drives the conveyor belt 74 to continue moving, moving the welding component 3 to pipe 1. The first sliding component 6 moves the welding component 3 out of the pressure plate 5 and acts on pipe 1, thereby welding pipe 1. After welding is completed, the third drive unit 71 drives the conveyor belt 74 to continue moving, moving the cutting component 4 to pipe 1. The first sliding component 6 moves the cutting component 4 out of the pressure plate 5 and acts on pipe 1, thereby cutting pipe 1.

[0067] In some optional embodiments, the second sliding assembly 7 further includes a support rail 75 and a slider 76, the support rail 75 and the slider 76 being slidably connected, the sliding direction of the slider 76 being the same as the rotation direction of the conveyor belt 74, and the pressure plate 5 being connected to the slider 76.

[0068] A support rail 75 is located between two conveyor belts 74. The support rail 75 is slidably connected to a slider 76, which is connected to a pressure plate 5. When the pressure plate 5 slides, it can drive the slider 76 to slide, so that the sliding direction of the slider 76 is the same as the rotation direction of the conveyor belt 74. The support rail 75 and slider 76 provide further support for the pressure plate 5 and also improve the smoothness of the sliding of the pressure plate 5.

[0069] In some optional embodiments, a leak detection device may also be provided at the cut-off component 4. The leak detection device can be used to detect leaks by spraying helium gas, and can check the casing to prevent leakage of the pipeline 1.

[0070] Reference Figures 1-9 , Figure 9 This illustration shows a metallographic structure of the weld seam in a pipe cross-section after welding, according to an embodiment of this application. This application also includes a welding method using a sealing welding device, comprising heating the pipe 1 at a heating component 2 to bring the pipe 1 to a preset temperature;

[0071] The heated pipe 1 is moved between the first welding plate 32 and the second welding plate 33 of the welding assembly 3. The first driving member 34 drives the second welding plate 33 to move toward the first welding plate 32 to flatten the pipe 1 before welding. The first welding part 321 and the second welding part 331 engage to increase the local stress of the pipe 1 and improve the welding effect of the pipe 1.

[0072] The heating component 2 includes an induction coil 21 and an induction power supply 22, with the induction coil 21 located at the induction power supply 22. During heating, the first sliding component 6 drives the heating component 2 to extend out of the pressure plate 5, and the pipe 1 is located in the induction coil 21, thereby heating the pipe 1 until the pipe 1 reaches a preset temperature, such as 1100°C.

[0073] After the pipe 1 is heated, the second sliding component 7 drives the welding component 3 to move to the pipe 1, and the first sliding component 6 drives the welding component 3 to extend the pressure plate 5, so that the pipe 1 is located between the first welding plate 32 and the second welding plate 33. The first driving component 34 drives the first welding plate 32 to abut against the second welding plate 33, and the second welding part 331 drives the pipe 1 to extend into the first welding part 321. The arrangement of the first welding part 321 and the second welding part 331 increases the local stress of the pipe, thereby enhancing the welding sealing effect of the pipe 1.

[0074] After the welding of pipe 1 is completed, the second sliding component 7 drives the cutting component 4 to move to pipe 1, the first sliding component 6 drives the cutting component 4 to extend the pressure plate 5, and put pipe 1 into the cutting groove. The second driving component drives the cutter 41 to move toward the cutter seat 43, thereby cutting pipe 1 to complete the sealing of pipe 1 of powder metallurgy parts.

[0075] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0076] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0077] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A sealing welding device for sealing a pipe of a powder metallurgy component enclosure, said pipe comprising a powder discharge pipe and / or a degassing pipe, characterized in that, The sealing equipment includes: Heating components are used to provide the temperature and heat required for welding the pipes; and A welding assembly includes a first base and a first welding plate, a second welding plate, and a first driving member disposed on the first base. The output end of the first driving member is connected to the second welding plate to drive the second welding plate to move toward the first welding plate, thereby flattening and welding the pipe located between the first welding plate and the second welding plate. The first welding plate has a first welding part on the side facing the second welding plate, and the second welding plate has a second welding part on the side facing the first welding plate. The first welding part and the second welding part are adapted to and can be engaged. The extension directions of the first welding part and the second welding part are arranged at an angle to the axial direction of the pipe. The first welding part includes a first protrusion and a first groove arranged crosswise along the axial direction of the pipe, and the second welding part includes a second groove and a second protrusion arranged crosswise along the axial direction of the pipe. The second groove is adapted to the first protrusion, and the first groove is adapted to the second protrusion. The first welding plate has a first limiting portion protruding from both sides along the extension direction of the first welding portion, and the second welding plate has a second limiting portion protruding from both sides along the extension direction of the second welding portion. The first limiting portion is used to abut against the second limiting portion.

2. The sealing and welding equipment according to claim 1, characterized in that, The sum of the thicknesses of the first limiting part and the second limiting part is the first distance, and the thickness of the pipe is the second distance. The first distance is greater than the second distance but less than twice the second distance.

3. The sealing and welding equipment according to claim 1, characterized in that, The first welding plate is detachably connected to the first base via a first fixing frame, and the second welding plate is detachably connected to the first driving component via a second fixing frame. Either the first fixing frame or the second fixing frame is provided with a sleeve, and the other is provided with a guide rod that extends into the sleeve and is slidably connected to the sleeve.

4. The sealing and welding equipment according to claim 1, characterized in that, The heating component includes an induction coil, which is an open induction coil arranged in an arc shape, with the opening of the induction coil facilitating the insertion or extension of the pipe.

5. The sealing and welding equipment according to claim 1, characterized in that, It also includes a cutting assembly, which includes a cutter and a second drive unit, the output end of which is connected to the cutter to drive the cutter to cut off the excess of the welded pipe.

6. The sealing and welding equipment according to claim 5, characterized in that, It also includes a pressure plate and a first sliding assembly disposed on the pressure plate, the first sliding assembly comprising: A support fixing base is provided on the pressure plate; The screw is threadedly connected to the support fixing seat; The bracket is threadedly connected to the screw. Mounting plate, connected to the bracket; The first sliding assembly is provided in at least three parts, and the mounting plates of the three first sliding assemblies are respectively connected to the heating assembly, the welding assembly and the cutting assembly to drive the heating assembly, the welding assembly or the cutting assembly to extend out of the pressure plate.

7. The sealing and welding equipment according to claim 6, characterized in that, It also includes a second sliding assembly, which comprises a third driving member, a first rotating wheel, a second rotating wheel, a conveyor belt, a support rail, and a slider. The conveyor belt is sleeved on the first and second rotating wheels. The third driving member drives the first and second rotating wheels to rotate, thereby driving the conveyor belt to rotate. The rotation direction of the conveyor belt is perpendicular to the sliding direction of the first sliding assembly. The pressure plate is connected to the conveyor belt. The support rail is slidably connected to the slider. The sliding direction of the slider is the same as the rotation direction of the conveyor belt. The pressure plate is also connected to the slider.

8. A welding method for a sealing welding device, characterized in that, The application uses the sealing welding equipment according to any one of claims 1-7, and the welding method includes: The pipe is heated at the heating element to bring it to a preset temperature; The heated pipe is moved between the first and second welding plates of the welding assembly. The first driving member drives the second welding plate to move toward the first welding plate to flatten the pipe before welding. The first and second welding parts engage to increase the local stress of the pipe and improve the welding effect.

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