PEEK sealing ring welding tool and welding method thereof

Abstract

The invention belongs to the field of welding, and particularly relates to a PEEK sealing ring welding tool and a welding method thereof. Comprising a workbench; the clamps are arranged on the workbench and used for fixing the arc-shaped segments of the sealing ring, and the two clamps are oppositely arranged; the first driving mechanism is connected with the clamps and used for driving the two clamps to get close to each other or get away from each other; the cutting assembly is arranged between the two clamps and is used for cutting the end parts of the arc-shaped segments fixed in the clamps; the heating assembly is arranged between the two clamps and is used for heating the end part of the cut arc-shaped segment; and the supporting assembly is arranged below the workbench and used for supporting and fixing the welded arc-shaped segments. The welding tool has the beneficial effects that the welding tool is simple in structure, convenient to operate and capable of effectively supporting a long welding blank which is welded, and the welding requirement of the PEEK sealing ring is better met.

Description

Technical Field

[0001] The invention belongs to the field of welding, and in particular relates to a PEEK sealing ring welding tool and a welding method thereof. Background Art

[0002] With the development of modern industry, the performance requirements of materials are getting higher and higher. Special engineering plastics have been widely used in many fields such as aerospace, automobile manufacturing, medical equipment, etc. due to their excellent mechanical properties, chemical stability and high temperature resistance. The welding of PEEK sealing rings is a key technical link. For large sealing rings, when injection molding and molding are not suitable due to cost, welding becomes a more economical and quick way. Due to the high melting point of PEEK (about 340℃) and its sensitivity to temperature, traditional welding methods such as ultrasonic welding and laser welding may not meet specific process requirements in some cases. Summary of the invention

[0003] In order to solve the defect in the prior art that traditional welding cannot meet the requirements of sealing ring welding, the present invention provides a PEEK sealing ring welding tool and a welding method thereof.

[0004] The technical solution adopted by the present invention is as follows: a PEEK sealing ring welding tool, comprising

[0005] Workbench;

[0006] A clamp is arranged on the workbench and is used to fix the arc segment of the sealing ring. There are two clamps and they are arranged opposite to each other.

[0007] A first driving mechanism, connected to the clamps, for driving the two clamps to move closer to each other or away from each other;

[0008] A cutting assembly, disposed between the two clamps, for cutting the ends of the arc-shaped segments fixed in the clamps;

[0009] A heating component, disposed between the two clamps, for heating the ends of the cut arc-shaped segments;

[0010] The support assembly is arranged below the workbench and is used to support and fix the arc segment after welding.

[0011] Preferably, the clamp comprises an upper clamp block and a lower clamp block slidably arranged on a workbench, at least the lower clamp block is provided with an installation cavity matching the outer contour of the arc segment, the upper clamp block is installed on the lower clamp block, and is used to clamp the arc segment in the installation cavity, both ends of the installation cavity pass through the lower clamp block, one end extends toward the heating component, and the other end extends toward the support component.

[0012] Preferably, the installation cavity gradually decreases in height from the direction away from the heating component.

[0013] Preferably, the height of the lower clamping block gradually decreases in a direction away from the heating component.

[0014] Specifically, the cutting assembly includes a mounting frame, a cutter assembly, and a lifting platform; the lifting platform is slidably arranged on the mounting frame, and a second driving mechanism is arranged on the mounting frame to drive the lifting of the lifting platform; the cutter assembly includes a mounting plate, a third driving mechanism, a cutter, and a bottom plate, and the third driving mechanism is installed on the lifting platform. The output end of the third driving mechanism is fixed with the mounting plate and drives the mounting plate to move up and down. The cutter is arranged at the bottom of the mounting plate, and the bottom plate is located below the cutter and is fixedly connected to the lifting platform.

[0015] Preferably, a shaping block is further provided on the workbench, and the shaping block is located below the base plate. A fourth driving mechanism is connected to the shaping block and is used to drive the shaping block to move closer to or away from the base plate. A cavity matching the shape of the arc segment welding point is provided on the opposite surfaces of the shaping block and the base plate.

[0016] Specifically, the heating component and the cutting component are respectively arranged on both sides of the workbench, and the heating component includes a fifth driving mechanism and a heating plate, and the fifth driving mechanism can drive the heating plate toward or away from the cutting component.

[0017] Preferably, the support assembly comprises an annular bracket and a fixing block, and the fixing block is slidably disposed on the annular bracket.

[0018] Furthermore, a notch is provided on the workbench to provide space for the arc segment clamped in the fixture.

[0019] The present invention also provides a welding method using the above-mentioned PEEK sealing ring welding tooling, wherein two arc segments of the sealing ring are respectively clamped in the two clamps, and at least one end facing the cutting component is exposed to the outside, and the arc segment in the clamp is driven by a first driving mechanism to move toward the cutting component, and the cutting component cuts the end of the arc segment neatly; then the cut end of the arc segment is heated by a heating component, and after the heating is completed, the heated ends of the two arc segments are made close to form a welding blank; then another arc segment is installed in one of the clamps, and the welding blank is installed in the other clamp, and the end of the welding blank away from the cutting component is supported and fixed on the supporting component, and the above welding process is repeated until the welding of the complete sealing ring is completed.

[0020] Beneficial effects: The welding tooling of the present invention has a simple structure and is easy to operate. It can effectively support welding blanks that have been welded for a long time, and is more in line with the welding requirements of PEEK sealing rings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front view of the tooling of the present invention;

[0022] Figure 2 It is a top view of the tooling of the present invention;

[0023] Figure 3 It is a cross-sectional view of the tooling of the present invention;

[0024] Figure 4 for Figure 3 A magnified view of the structure at center;

[0025] Figure 5 This is a cross-sectional view of the fixed block.

[0026] In the figure, 1. workbench, 11. notch, 2. fixture, 21. lower clamping block, 22. upper clamping block, 23. mounting cavity, 24. connecting ear, 3. first driving mechanism, 41. mounting frame, 42. lifting platform, 43. second driving mechanism, 44. third driving mechanism, 45. bottom plate, 451. cavity, 46. cutter, 47. mounting plate, 5. heating component, 51. fifth driving mechanism, 52. heating plate, 6. annular bracket, 61, slide groove, 7. fixing block, 71. fixing cavity, 81. fourth driving mechanism, 82. shaping block. DETAILED DESCRIPTION

[0027] like Figures 1 to 3 As shown, a PEEK sealing ring welding tool comprises

[0028] Workbench 1;

[0029] A clamp 2 is arranged on the workbench 1 and is used to fix the arc segment of the sealing ring. There are two clamps 2 and they are arranged opposite to each other.

[0030] A first driving mechanism 3, connected to the clamps 2, and used to drive the two clamps 2 to move closer to each other or away from each other;

[0031] A cutting assembly, disposed between the two clamps 2, for cutting the ends of the arc-shaped segments fixed in the clamps 2;

[0032] A heating component 5 is disposed between the two clamps 2 and is used to heat the ends of the cut arc segments;

[0033] The support assembly is arranged below the workbench 1 and is used to support and fix the arc segment after welding.

[0034] In some embodiments, Figure 3 As shown, the clamp 2 comprises an upper clamp block 22 and a lower clamp block 21 slidably disposed on the workbench 1, at least the lower clamp block 21 is provided with a mounting cavity 23 matching the outer contour of the arc segment, the upper clamp block 22 is mounted on the lower clamp block 21, and is used to clamp the arc segment in the mounting cavity 23, and both ends of the mounting cavity 23 pass through the lower clamp block 21, one end of which extends toward the heating component 5, and the other end of which extends toward the support component. The upper clamp block 22 can be provided with a mounting cavity 23, and the mounting cavity 23 of the upper clamp block 22 and the mounting cavity 23 of the lower clamp block 21 are the same shape as the arc segment after matching, so as to facilitate clamping and fixing the arc segment between the upper clamp block 22 and the lower clamp block 21, and at the same time, the upper clamp block 22 and the lower clamp block 21 are provided with connecting ears 24, and bolts pass through the connecting ears 24 to fix and lock the upper clamp block 22 and the lower clamp block 21. In some embodiments, the upper clamp 22 can also be a fixing component such as a clamp, and the clamp is used to fix the arc segment in the installation cavity 23 of the lower clamp 21. After the arc segment is fixed in the installation cavity 23, one end extends out of the installation cavity 23 toward the heating component 5. If the arc segment is longer, the other end can also extend out of the installation cavity 23 and be supported and fixed on the support component. The sliding connection between the lower clamp 21 and the workbench 1 can be that a slideway is set on the workbench 1, and a slider that cooperates with the slideway is set on the lower clamp 21, and the slider cooperates with the slideway to form a sliding connection.

[0035] In some embodiments, the height of the installation cavity 23 gradually decreases from the direction away from the heating assembly 5. Since the arc segment is arc-shaped, the installation cavity 23 is tilted to make one end of the arc segment relatively horizontal, which is convenient for cutting, heating and welding operations.

[0036] Accordingly, in some embodiments, the height of the lower clamping block 21 gradually decreases in the direction away from the heating assembly 5, otherwise the arc segment will be deeply sunk into the lower clamping block 21, making it inconvenient to operate.

[0037] Specifically, in some embodiments, Figure 3 and 4As shown, the cutting assembly includes a mounting frame 41, a cutter 46 assembly, and a lifting platform 42; the lifting platform 42 is slidably arranged on the mounting frame 41, and a second driving mechanism 43 is arranged on the mounting frame 41 to drive the lifting of the lifting platform 42; the cutter 46 assembly includes a mounting plate 47, a third driving mechanism 44, a cutter 46, and a bottom plate 45, and the third driving mechanism 44 is installed on the lifting platform 42. The output end of the third driving mechanism 44 is fixedly provided with the mounting plate 47, and drives the mounting plate 47 to move up and down. The cutter 46 is arranged at the bottom of the mounting plate 47, and the bottom plate 45 is located below the cutter 46 and is fixedly connected to the lifting platform 42. There are two cutters 46, corresponding to two clamps 2 respectively. After the arc segment is installed in the fixture 2, the lifting platform 42 is lowered to a predetermined height, and the two fixtures 2 are moved toward the cutting assembly so that one end of the arc segment is located between the cutter 46 and the base plate 45. The third driving mechanism 44 is started to lower the cutter 46 for cutting, and the excess is removed to form a flush welding surface.

[0038] In some embodiments, Figure 3 and 4 As shown, the workbench 1 is also provided with a shaping block 82, the shaping block 82 is located below the bottom plate 45, the fourth driving mechanism 81 is connected to the shaping block 82, and is used to drive the shaping block 82 to approach or move away from the bottom plate 45, and a cavity 451 matching the shape of the arc segment welding position is provided on the opposite surface of the shaping block 82 and the bottom plate 45. During welding, the shaping block 82 cooperates with the cavity 451 on the bottom plate 45 to ensure the regularity of the welding position and avoid the situation where the melt protrudes or sinks during welding.

[0039] Specifically, Figure 2 As shown, the heating assembly 5 and the cutting assembly are respectively arranged on both sides of the workbench 1, and the heating assembly 5 includes a fifth driving mechanism 51 and a heating plate 52. The fifth driving mechanism 51 can drive the heating plate 52 toward or away from the cutting assembly. The heating plate 52 can be used to heat the welding end of the arc segment to achieve welding, and the fifth driving mechanism 51 can be used to make the heating plate 52 close to or away from the cutting assembly, so as to avoid the cutting assembly during the cutting operation to avoid mutual interference.

[0040] In some embodiments, Figures 1 to 3 As shown, the support assembly includes an annular support 6 and a fixing block 7, and the fixing block 7 is slidably disposed on the annular support 6. The welding blank formed by welding two or more arc-shaped segments is relatively long and arc-shaped. The annular support 6 is also arc-shaped, and the welding blank can naturally extend along the annular support 6. At the same time, the fixing block 7 can fix the welding blank on the annular support 6. Figure 2and 3 In order to realize the sliding of the fixing block 7 on the annular bracket 6, a slide groove 61 can be provided on the surface of the annular bracket 6, and the bottom of the fixing block 7 can be slidably arranged in the slide groove 61. At the same time, a fixing cavity 71 for installing the arc segment or welding blank can be formed on the fixing block 7, and fixed with fasteners such as a clamp. Figure 5 As shown, the slide groove 61 can be designed as a dovetail groove, and the bottom of the fixing block 7 is dovetail-shaped to prevent the fixing block 7 from being disengaged. The number of fixing blocks 7 can be set to be multiple, so as to facilitate multiple fixation when the welding blank is long. In addition, in order to facilitate the connection between the annular bracket 6 and the workbench 1, the top of the annular bracket 6 can be removed to form an opening, and the two ends of the opening of the annular bracket 6 are fixed to the mounting platform and aligned with the mounting cavity 23 on the fixture 2.

[0041] Specifically, the workbench 1 is provided with a notch 11 to provide a space for the arc segment clamped in the fixture 2. This allows one end of the arc segment or the welding blank to extend to the annular bracket 6 for easy fixation. In addition, the lower clamping block 21 may also be provided with a notch 11 to reduce the weight of the lower clamping block 21, and also facilitate observation and the operation of passing the arc segment or the welding blank through the notch 11 on the workbench 1.

[0042] In addition, in some embodiments, the first drive mechanism 3, the second drive mechanism 43, the third drive mechanism 44, the fourth drive mechanism 81 and the fifth drive mechanism 51 are designed as linear motion units such as air cylinders, oil cylinders, telescopic electric cylinders, etc.

[0043] The present invention also provides a welding method using the above-mentioned PEEK sealing ring welding tooling, wherein the two arc segments of the sealing ring are respectively clamped in the two clamps 2, and at least one end facing the cutting component is exposed to the outside, and the first driving mechanism 3 is used to drive the arc segment in the clamp 2 to move toward the cutting component, and the cutting component cuts the end of the arc segment neatly; then the heating component 5 is used to heat the cut end of the arc segment, and after the heating is completed, the heated ends of the two arc segments are made to stick together to form a welding blank; then another arc segment is installed in one of the clamps 2, and the welding blank is installed in the other clamp 2, and the end of the welding blank away from the cutting component is supported and fixed on the supporting component, and the above welding process is repeated until the welding of the complete sealing ring is completed.

[0044] The specific implementation can be done as follows:

[0045] (1) Preparation: Prepare multiple PEEK sealing ring arc segments, which can form a PEEK sealing ring by welding the multiple PEEK sealing ring arc segments end to end in sequence; return the two clamps 2 to the zero position away from each other, lift the lifting platform 42 to the highest point, lift the cutter 46 to a position away from the bottom plate 45, and return the heating component 5 to a position away from the cutting component.

[0046] (2) Installation: An arc segment is installed in the installation cavity 23 of the lower clamping block 21 of each of the two clamps 2, one end of which protrudes from the lower clamping block 21 and extends toward the cutting assembly to form a welding end, and the other end does not protrude from the lower clamping block 21 due to the length of the arc segment and is fixed by the upper clamping block 22.

[0047] (3) Cutting: The second driving mechanism 43 is used to lower the lifting platform 42 until the bottom plate 45 is located below the welding end of the arc segment on the clamp 2. The first driving mechanism 3 drives the two clamps 2 to move closer to each other so that the welding end is located above the bottom plate 45. After reaching the predetermined position, the third driving mechanism 44 drives the cutter 46 to move downward for cutting. After the cutting is completed, the cutter 46 and the lifting platform 42 are reset;

[0048] (4) Heating: The fifth driving mechanism 51 drives the heating plate 52 to move toward the cutting mechanism. After reaching the predetermined position, the heating plate 52 is heated. The preset temperature is 360° C. After reaching the preset temperature, it is maintained for 5 minutes. The first driving mechanism 3 drives the arc segment on the clamp 2 to move toward the heating plate 52 until the welding end after cutting is about 0.2 mm away from the heating plate 52. The heating is performed for 1 minute. After the heating is completed, the fifth driving mechanism 51 drives the heating plate 52 to return to its original position.

[0049] (5) Welding: The first driving mechanism 3 drives the clamp 2 to move until the two welding ends are completely in contact. The second driving mechanism 43 drives the bottom plate 45 downward, and the fifth driving mechanism 51 drives the shaping block 82 upward until the two cooperate and the welding point is in the cavity 451 formed by the bottom plate 45 and the shaping block 82. The welding is completed for 2 minutes to form a welding blank. The clamp 2 is released to remove the welding blank.

[0050] (6) Repeat welding: replace one of the arc segments in step 2 with the welding blank, install it in one of the fixtures 2, and install another arc segment to be welded in another fixture 2, and repeat the above steps (2) to (5) until a complete PEEK sealing ring is formed by welding.

[0051] Since the welding blank is relatively long, its tail is fixed on the fixed block 7 through the notch 11 on the mounting platform. Since the welding blank is arc-shaped and has a certain toughness, one end of it is clamped and fixed in the fixture 2. Therefore, even if the fixed block 7 that fixes the welding blank is fixed on the annular bracket 6, it will not affect the fixture 2 driving the welding blank to move for cutting, heating, welding and other processes; of course, the fixed block 7 can also not be fixed on the annular bracket 6, so that it can slide on the annular bracket 6 with the movement of the fixture 2, and it will not affect the fixture 2 driving the welding blank to move for cutting, heating, welding and other processes.

[0052] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A PEEK sealing ring welding tool, characterized in that: comprising a workbench (1); A clamp (2) is arranged on the workbench (1) and is used to fix the arc segment of the sealing ring. There are two clamps (2) and they are arranged opposite to each other. A first driving mechanism (3) connected to the clamps (2) and used to drive the two clamps (2) to move closer to each other or farther away from each other; A cutting assembly, arranged between the two clamps (2), and used for cutting the ends of the arc-shaped segments fixed in the clamps (2); A heating component (5) is disposed between the two clamps (2) and is used to heat the ends of the cut arc-shaped segments; A support assembly is arranged below the workbench (1) and is used to support and fix the arc segment after welding.

2. The PEEK sealing ring welding tool according to claim 1, characterized in that: The clamp (2) comprises an upper clamp block (22) and a lower clamp block (21) slidably arranged on the workbench (1), at least the lower clamp block (21) is provided with a mounting cavity (23) matching the outer contour of the arc segment, the upper clamp block (22) is mounted on the lower clamp block (21) and is used to clamp the arc segment in the mounting cavity (23), and both ends of the mounting cavity (23) pass through the lower clamp block (21), one end of which extends toward the heating component (5), and the other end of which extends toward the support component.

3. The PEEK sealing ring welding tool according to claim 2, characterized in that: The height of the installation cavity (23) gradually decreases in a direction away from the heating component (5).

4. The PEEK sealing ring welding tool according to claim 3, characterized in that: The height of the lower clamping block (21) gradually decreases in a direction away from the heating component (5).

5. The PEEK sealing ring welding tool according to claim 1, characterized in that: The cutting assembly comprises a mounting frame (41), a cutter (46) assembly, and a lifting platform (42); the lifting platform (42) is slidably arranged on the mounting frame (41), and a second driving mechanism (43) is arranged on the mounting frame (41) for driving the lifting platform (42) to move up and down; the cutter (46) assembly comprises a mounting plate (47), a third driving mechanism (44), a cutter (46), and a bottom plate (45); the third driving mechanism (44) is mounted on the lifting platform (42); the mounting plate (47) is fixedly arranged at the output end of the third driving mechanism (44), and drives the mounting plate (47) to move up and down; the cutter (46) is arranged at the bottom of the mounting plate (47); the bottom plate (45) is located below the cutter (46) and is fixedly connected to the lifting platform (42).

6. The PEEK sealing ring welding tool according to claim 5, characterized in that: The workbench (1) is also provided with a shaping block (82), the shaping block (82) being located below the base plate (45), a fourth driving mechanism (81) being connected to the shaping block (82) and being used for driving the shaping block (82) to move closer to or away from the base plate (45), and a cavity (451) matching the shape of the arc segment welding position is provided on the surfaces opposite to each other of the shaping block (82) and the base plate (45).

7. The PEEK sealing ring welding tool according to claim 1, characterized in that: The heating component (5) and the cutting component are respectively arranged on two sides of the workbench (1); the heating component (5) comprises a fifth driving mechanism (51) and a heating plate (52); the fifth driving mechanism (51) can drive the heating plate (52) towards or away from the cutting component.

8. The PEEK sealing ring welding tool according to claim 1, characterized in that: The support assembly comprises an annular support (6) and a fixing block (7), wherein the fixing block (7) is slidably arranged on the annular support (6).

9. The PEEK sealing ring welding tool according to claim 8, characterized in that: The workbench (1) is provided with a notch (11) to provide space for the arc segment clamped in the clamp (2).

10. The welding method of the PEEK sealing ring welding tool according to any one of claims 1 to 9, characterized in that: The two arc segments of the sealing ring are clamped in the two clamps (2) respectively, and at least one end facing the cutting component is exposed to the outside. The arc segment in the clamp (2) is driven by the first driving mechanism (3) to move toward the cutting component, and the cutting component cuts the end of the arc segment neatly. The cut end of the arc segment is then heated by the heating component (5). After the heating is completed, the heated ends of the two arc segments are pressed tightly together to form a welding blank. Then, another arc segment is installed in one of the clamps (2), and the welding blank is installed in the other clamp (2). The end of the welding blank away from the cutting component is supported and fixed on the support component. The above welding process is repeated until the welding of the complete sealing ring is completed.

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