Multi-workpiece induction welding device

Abstract

This invention discloses a multi-workpiece induction welding device, comprising: an induction welding device, a conveying platform, and a positioning fixture. A second clamping block is disposed between a second slot seat and a first clamping block. A left fixing rod and a right fixing rod are disposed on the side of the positioning base near the base plate. A limiting block with a through groove is installed on the top of the positioning base and is symmetrically arranged about the processed pipe B. A clamping rod with one end located inside the through groove is elastically connected to the left and right fixing rods through an elastic element. The other end of this clamping rod is located on both sides of the annular groove of the processed workpiece A, thereby clamping its second flange to the second clamping block. A fixing plate with a cover plate rotatably connected to its upper end is installed on one side of the base. The side of the cover plate away from the fixing plate can be fastened to the base. This invention's multi-workpiece induction welding device, while achieving preliminary positioning of the processed workpiece, prevents the welding process from being exposed to the outside air, effectively reducing the possibility of welding defects caused by oxidation at the welding point, and improving welding quality.

Description

Technical Field

[0001] This invention relates to a multi-workpiece induction welding device, belonging to the field of precision parts processing technology. Background Technology

[0002] During processing and production, various pipe fittings and connectors need to be welded and assembled. The traditional welding method is argon arc welding, which has the following main disadvantages: 1. It is harmful to the human body. During the welding process, a large amount of ozone and nitrogen oxides are generated, which have a significant impact on the human body, especially damaging the respiratory tract and lungs. In addition, radioactive gases or particles are emitted during the welding process. These particles, once ingested, act as internal radiation sources, seriously affecting human life. 2. It is not environmentally friendly. Welding fumes are generated during the welding process, causing environmental pollution. 3. It poses safety hazards. Slight carelessness during welding can cause arc burns, and constant vigilance is required to prevent fire, electric shock, and other safety hazards.

[0003] Currently, for plastic-metal composite pipes extruded from thermoplastic plastics, the installation of pipe fittings generally employs mechanical connections and thermofusion connections. One effective and controllable thermofusion connection method is electromagnetic induction welding. This involves inserting the composite pipe containing a magnetic metal layer into the receiving end of a thermoplastic connector, and then using an electromagnetic induction generator to controllably heat and melt the magnetic metal layer of the composite pipe into the receiving end of the thermoplastic connector. This indirect heating of the plastic melts it, fusing it into a single unit, achieving the thermofusion connection between the composite pipe and the connector. However, in existing technologies, when welding two processed parts, the positions of the parts are prone to shift, resulting in poor welding quality. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-workpiece induction welding device. This device can not only perform preliminary positioning of the workpiece, but also fix the workpiece in multiple directions, thereby greatly improving the positional accuracy of the workpiece and improving the overall welding effect.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: a multi-workpiece induction welding device for electromagnetic induction welding between workpiece A and workpiece B, comprising: an induction welding device, a conveying platform, and a positioning fixture. The conveying platform, on which the positioning fixture is installed, is located on one side of the induction welding device. The induction welding device has a magnetic induction coil for welding. The workpiece A, which has a communicating cavity inside, has an annular groove at one end near the workpiece B. A first flange and a second flange are respectively located on the front and rear sides of the annular groove. The positioning fixture further includes: a base, a positioning base, and a base plate. The positioning base and the base plate are respectively installed on the top of the base connected to the conveying platform. The positioning base located at the front end of the base plate has an extension platform. A first locking block is provided on each of the top two sides of the extension platform near the magnetic induction coil. The first flange of the processing part A is engaged between the two first locking blocks. A first slot is provided on the top of the base plate along its length. A second slot is provided between the first locking block and the first slot. The first slot and the second slot are coaxially arranged for the processing tube B to be installed. A second locking block is provided between the second slot seat and the first locking block. A left fixing rod and a right fixing rod are provided on the side of the positioning base near the base plate. A limiting block with a through groove is installed on the top of the positioning base and is symmetrically arranged about the processing tube B. A clamping rod with one end located inside the through groove is elastically connected to the left fixing rod and the right fixing rod through an elastic element. The other end of this clamping rod is located on both sides of the annular groove of the processing part A, thereby clamping its second flange with the second locking block. A fixed plate with a cover plate rotatably connected to the upper end is installed on one side of the base. The side of the cover plate away from the fixed plate can be fastened to the base. The top of the cover plate has a first through hole and a second through hole. The line connecting the first through hole and the second through hole is parallel to the length direction of the processed pipe B. An upper pressure block is set above the positioning base. A first pin and a second pin pass through one end of the upper pressure block and are correspondingly embedded in the first through hole and the second through hole. The top of the second pin has a pin head. A spring fitted on the outer wall of the second pin is set between the pin head and the upper pressure block. When the cover plate is fastened to the base, the other end of the upper pressure block is pressed against the top of the first flange. The first pin and the second pin are beveled pins, and the beveled planes of the first pin and the second pin are perpendicular to each other; a first stop screw is embedded in the front end face of the cover plate and abuts against the first pin located inside the first through hole, and a second stop screw is embedded in the side end face of the cover plate and abuts against the second pin located inside the second through hole. The processing pipe B is installed on the first slot seat and the second slot seat and pressed tightly by the cover plate. A lever is provided on each of the opposite sides of the two clamping rods. The elastic element is a right-angle tension spring.

[0006] The following are further improvements to the above technical solution: 1. In the above scheme, a receiving groove is provided between the second card block and the second slot seat, and the receiving groove is for a positioning clamp block to be detachably installed.

[0007] 2. In the above scheme, the surface of the induction welding device is equipped with a display screen and a control panel with buttons. The display screen is used to display the working status of the induction welding device and the conveyor platform.

[0008] 3. In the above scheme, the first slot seat and the second slot seat are V-shaped slot seats.

[0009] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: 1. The multi-workpiece induction welding device of the present invention has a left fixing rod and a right fixing rod on the side of the positioning base near the substrate. A clamping rod with one end located inside the through groove is elastically connected to the left fixing rod and the right fixing rod through an elastic element. The other end of the clamping rod is located on both sides of the workpiece A, thereby clamping the workpiece A with the second clamping block. The side of the cover plate away from the fixing plate can be fastened to the base. The first pin and the second pin pass through one end of the upper pressure block and are correspondingly embedded in the first through hole and the second through hole. The top end of the second pin has a pin head, and a set of the second pin is attached to the second pin. The spring on the outer wall is positioned between the nail head and the upper pressure block. When the cover plate and the base are fastened together, the other end of the upper pressure block presses against the top of the workpiece A. The first and second slot seats achieve initial positioning of the workpiece B. The first locking block achieves initial fixation of the workpiece A. The clamping rod can clamp the workpiece A and the second locking block from both sides. The upper pressure block can also press the workpiece A tightly, and the cover plate can hold the workpiece B tightly with the first and second slot seats. This greatly improves the positional accuracy of the workpieces A and B and improves the overall welding effect.

[0010] 2. The multi-workpiece induction welding device of the present invention has a sliding groove for a slider with a gas needle to slide and connect. The gas needle for filling protective gas can pass through the through hole of the partition plate and extend into the interior of the processing tube B. Thus, protective gas can be filled into the processing tube B at the same time as the processing workpiece A and the processing tube B are being welded, preventing the welding from being exposed to the outside air, effectively reducing the situation of welding defects caused by oxidation at the welding point, and improving the welding quality. Attached Figure Description

[0011] Appendix Figure 1 This is a schematic diagram of the overall structure of the multi-workpiece induction welding device of the present invention; Appendix Figure 2 This is a partial exploded view of the multi-workpiece induction welding device of the present invention; Appendix Figure 3 Appendix to this invention Figure 2 Enlarged view of point A; Appendix Figure 4 This is a partial longitudinal cross-sectional perspective view of the multi-workpiece induction welding device of the present invention; Appendix Figure 5 This is a perspective view of a partial cross-sectional view of the multi-workpiece induction welding device of the present invention.

[0012] In the above figures: 100, workpiece A; 101, communicating cavity; 102, annular groove; 103, first flange; 104, second flange; 200, workpiece B; 1, induction welding device; 2, magnetic induction coil; 3, conveying platform; 4, positioning fixture; 5, base; 6, positioning base; 601, extension stage; 7, base plate; 8, first slot seat; 9, first locking block; 10, second slot seat; 11, second locking block; 12, left fixing rod; 13, right fixing rod; 14, limiting block; 141, through groove; 15, clamping rod; 16 17. Elastic element; 18. Fixing plate; 19. Cover plate; 20. First through hole; 21. Second through hole; 22. Upper pressure block; 23. First pin; 24. Second pin; 25. Pin head; 26. Spring; 27. Slide groove; 28. Divider plate; 29. ​​Third through hole; 30. Slider; 31. Air needle; 32. Stop block; 33. First stop screw; 34. Second stop screw; 35. Receiving groove; 36. Positioning clamp; 37. Pressure plate; 38. Limiting groove; 39. Buckle; 40. Toggle block; 41. Display screen; 42. Control panel. Detailed Implementation

[0013] The present patent can be further understood through the specific embodiments given below, but they are not intended to limit the present patent.

[0014] Example 1: A multi-workpiece induction welding device for electromagnetic induction welding between workpiece A100 and workpiece B200, comprising: an induction welding device 1, a conveying platform 3 and a positioning fixture 4. The conveying platform 3, on which the positioning fixture 4 is installed, is located on one side of the induction welding device 1. The induction welding device 1 has a magnetic induction coil 2 for welding. The workpiece A100, which has a communicating cavity 101 inside, has an annular groove 102 at one end near the workpiece B200. A first flange 103 and a second flange 104 are respectively provided on the front and rear sides of the annular groove 105. The positioning fixture 4 further includes: a base 5, a positioning base 6, and a base plate 7. The positioning base 6 and the base plate 7 are respectively installed on the top of the base 5 connected to the conveying platform 3. The positioning base 6 located at the front end of the base plate 7 has an extension platform 601. A first locking block 9 is provided on each of the top two sides of the extension platform 601 near the end of the magnetic induction coil 2. The first flange 103 of the processing part A100 is engaged between the two first locking blocks 9. A first slot seat 8 is provided on the top of the base plate 6 along its length direction. A second slot seat 10 is provided between the first locking block 9 and the first slot seat 8. The first slot seat 8 and the second slot seat 10, which are arranged coaxially, are used for the installation of the processing pipe B200. A second locking block 11 is provided between the second slot seat 10 and the first locking block 8. A left fixing rod 12 and a right fixing rod 13 are provided on the side of the positioning base 6 near the base plate 7. A limiting block 14 with a through groove 141 is installed on the top of the positioning base 6 and is symmetrically arranged about the processing tube B200. A clamping rod 15 with one end located inside the through groove 141 is elastically connected to the left fixing rod 12 and the right fixing rod 13 through an elastic member 16. The other end of the clamping rod 15 is located on both sides of the annular groove 102 of the processing part A100, thereby clamping its second flange 104 with the second locking block 10. A fixing plate 17 with a cover plate 18 rotatably connected to the upper end is installed on one side of the base 5. The side of the cover plate 18 away from the fixing plate 17 can be fastened to the base 5. The top of the cover plate 18 has a first through hole 19 and a second through hole 20. The line connecting the first through hole 19 and the second through hole 20 is parallel to the length direction of the processed pipe B200. An upper pressure block 21 is set above the positioning base 6. A first pin 22 and a second pin 23 pass through one end of the upper pressure block 21 and are correspondingly embedded in the first through hole 19 and the second through hole 20. The top end of the second pin 23 has a nail head 24. A spring 25 fitted on the outer wall of the second pin 23 is set between the nail head 24 and the upper pressure block 21. When the cover plate 18 is fastened to the base 5, the other end of the upper pressure block 21 is pressed against the top of the first flange 103. The first pin 22 and the second pin 23 are beveled pins, and the beveled planes of the first pin 22 and the second pin 23 are perpendicular to each other; a first stop screw 32 is embedded in the front end face of the cover plate 18 and abuts against the first pin 22 located inside the first through hole 19, and a second stop screw 33 is embedded in the side end face of the cover plate 18 and abuts against the second pin 23 located inside the second through hole 20. The processing pipe B is installed on the first slot seat and the second slot seat and pressed tightly by the cover plate. A lever 39 is provided on each of the opposite sides of the two clamping rods 14. The elastic element 15 is a right-angle tension spring.

[0015] Example 2: A multi-workpiece induction welding device for electromagnetic induction welding between workpiece A100 and workpiece B200, comprising: induction welding device 1, conveying platform 3 and positioning fixture 4, wherein the conveying platform 3 on which the positioning fixture 4 is installed is located on one side of the induction welding device 1. The induction welding device 1 has a magnetic induction coil 2 for welding, the conveying platform 3 is used to convey the positioning fixture 4, and the processing part A100 with a communicating cavity 101 inside has an annular groove 102 at one end near the processing tube B200. A first flange 103 and a second flange 104 are respectively provided on the front and rear sides of the annular groove 105. The positioning fixture 4 further includes: a base 5, a positioning base 6, and a base plate 7. The positioning base 6 and the base plate 7 are respectively installed on the top of the base 5 connected to the conveying platform 3. The positioning base 6 located at the front end of the base plate 7 has an extension platform 601. A first locking block 9 is provided on each of the top two sides of the extension platform 601 near the end of the magnetic induction coil 2. The first flange 103 of the processing part A100 is engaged between the two first locking blocks 9. A first slot seat 8 is provided on the top of the base plate 6 along its length direction. A second slot seat 10 is provided between the first locking block 9 and the first slot seat 8. The first slot seat 8 and the second slot seat 10, which are arranged coaxially, are used for the installation of the processing pipe B200. A second locking block 11 is provided between the second slot seat 10 and the first locking block 8. A left fixing rod 12 and a right fixing rod 13 are provided on the side of the positioning base 6 near the base plate 7. A limiting block 14 with a through groove 141 is installed on the top of the positioning base 6 and is symmetrically arranged about the processing tube B200. A clamping rod 15 with one end located inside the through groove 141 is elastically connected to the left fixing rod 12 and the right fixing rod 13 through an elastic member 16. The other end of the clamping rod 15 is located on both sides of the annular groove 102 of the processing part A100, thereby clamping its second flange 104 with the second locking block 10. It can fix the positions of workpiece A and workpiece B, and achieve the initial positioning of workpiece B through the first slot seat and the second slot seat. It can also clamp workpiece A with the second clamping block through the clamping rod, which further improves the positional accuracy of workpiece A and thus improves the overall welding effect.

[0016] A fixing plate 17 with a cover plate 18 rotatably connected to the upper end is installed on one side of the base 5. The side of the cover plate 18 away from the fixing plate 17 can be fastened to the base 5. The top of the cover plate 18 is provided with a first through hole 19 and a second through hole 20. The line connecting the first through hole 19 and the second through hole 20 is parallel to the length direction of the processed pipe B200. The cover plate 18 is rotated and pressed onto the processed pipe fitting B200, and the position of the processed pipe fitting B200 is adjusted so that it is located in the limiting groove 37 of the pressure plate 36. The cover plate 18 is fastened to the base 5 by the buckle 38, which improves the positional stability of the processed pipe fitting B200. An upper pressure block 21 is positioned above the positioning base 6. A first pin 22 and a second pin 23 pass through one end of the upper pressure block 21 and are correspondingly embedded in the first through hole 19 and the second through hole 20. The top end of the second pin 23 has a pin cap 24. A spring 25 fitted on the outer wall of the second pin 23 is positioned between the pin cap 24 and the upper pressure block 21. When the cover plate 18 is fastened to the base 5, the other end of the upper pressure block 21 is pressed against the top of the first flange 103.

[0017] The processed pipe fitting B is installed on the first slot seat and the second slot seat and pressed tightly by the cover plate. In addition to fixing the positions of the processed part A and the processed pipe fitting B, the positional accuracy is further improved by installing the processed part A between the first clamping blocks and pressing the processed part A tightly by the upper pressure block, thereby improving the welding effect.

[0018] A groove 26 is provided on the upper surface of the substrate 7 located away from the positioning base 5. A partition plate 27 with a third through hole 28 is provided between the groove 26 and the first groove seat 8. The groove 26 is slidably connected to a slider 29 with an air needle 30. The air needle 30, which is used to fill protective gas, can pass through the third through hole 28 of the partition plate 27 and extend into the interior of the processing tube B200. An air source is connected to the side of the slider 19 opposite to the air needle 20.

[0019] The slider 29 with the air needle 30 is pushed forward so that the air needle 30 is located inside the processing tube B and the air source is connected, and the protective gas rushes out from the other end to expel the outside air.

[0020] While welding workpiece A to workpiece B, protective gas can be introduced into workpiece B to prevent the weld from being exposed to outside air, effectively reducing the possibility of welding defects caused by oxidation at the weld and improving the welding quality.

[0021] The first pin 22 and the second pin 23 are beveled pins; the beveled planes of the first pin 22 and the second pin 23 are perpendicular to each other; a first fixing screw 32 is embedded in the front end face of the cover plate 18 and abuts against the first pin 22 located inside the first through hole 19, and a second fixing screw 33 is embedded in the side end face of the cover plate 18 and abuts against the second pin 23 located inside the second through hole 20.

[0022] The aforementioned induction welding device 1 is equipped with a display screen 40 and a control panel 41 with buttons. The display screen 40 is used to display the working status of the induction welding device 1 and the conveyor platform 3.

[0023] The first slot seat 7 and the second slot seat 10 mentioned above are V-shaped slot seats.

[0024] The aforementioned elastic element 15 is a right-angle tension spring.

[0025] A lever 39 is provided on each of the opposite sides of the two clamping rods 14.

[0026] The diameter of the above-mentioned processed pipe fitting B is 1mm.

[0027] The working principle is as follows: When in use, the cover plate 18 is opened, and the processing pipe B200 and the processing part A100 are pre-inserted. Then, the clamping rod 15 is stretched so that the processing part A100 can be clamped into the first clamping block 9. The processing pipe B200 is placed flush with the front end face of the partition plate 27 on the first slot seat 8 and the second slot seat 10. Then, the clamping rod 15 is released so that the clamping rod 15 clamps the processing part A100 with the second clamping block 11, which improves the positional stability of the processing part A100. The axial position of the processed pipe fitting B200 can also be adjusted by using positioning clamps 35 at different heights, which improves the coaxiality between the processed pipe fitting B200 and the end face of the connecting cavity 101, thereby ensuring the welding effect. Next, the cover plate 18 is rotated and pressed onto the processing pipe fitting B200, and the position of the processing pipe fitting B200 is adjusted so that it is located in the limiting groove 37 of the pressure plate 36. The cover plate 18 is fastened to the base 5 by the buckle 38, which improves the positional stability of the processing pipe fitting B200. The first pin 22 and the second pin 23, whose cutting planes are perpendicular to each other, fix the upper pressure block 21 on the cover plate 18, so that one end of the upper pressure block 21 is pressed against the top of the first flange 103, and the other end is kept pressed against the top of the cover plate 18 under the elastic force of the spring 25, thereby effectively preventing the upper pressure block 21 from warping. When the upper pressure block 21 is adjusted to move up and down, it can keep the upper pressure block 21 on the same straight line, improve the positional accuracy of the upper pressure block, and ensure the holding force of the upper pressure block 21 on the workpiece A. After the workpiece A100 and the workpiece B200 are installed on the positioning fixture 4, the slider 29 with the air needle 30 is pushed forward so that the air needle 30 is located inside the workpiece B and the air source is connected. The protective gas rushes out from the other end to exhaust the outside air. Then, by pressing the start button on the control panel 41, the transmission belt on the transmission platform 3 drives the base forward, so that the extension table 601 on the positioning base 6 extends into the heating area of ​​the magnetic induction coil 2 to perform heat fusion connection on the workpiece A100 and the workpiece B. After a certain time, the processing is completed. The transmission platform 3 drives the positioning fixture 4 to move backward, so that the extension table 601 exits the heating area of ​​the magnetic induction coil 2. Next, by opening the latch 38, flipping the cover plate 17, and stretching the clamping rod 15, the workpiece A100 is removed from the first clamping block 9 and the second clamping block 11.

[0028] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A multi-workpiece welding device for electromagnetic induction welding between workpiece A (100) and pipe fitting B (200), characterized in that: include: The induction welding device (1), the conveying platform (3) and the positioning fixture (4) are provided. The conveying platform (3) on which the positioning fixture (4) is installed is located on one side of the induction welding device (1). The induction welding device (1) has a magnetic induction coil (2) for welding. The workpiece A (100) with a communicating cavity (101) inside has an annular groove (102) at one end near the workpiece B (200). A first flange (103) and a second flange (104) are respectively provided on the front and rear sides of the annular groove (105). The positioning fixture (4) further includes: a base (5), a positioning base (6), and a base plate (7). The positioning base (6) and the base plate (7) are respectively installed on the top of the base (5) connected to the conveying platform (3). The positioning base (6) located at the front end of the base plate (7) has an extension platform (601). A first locking block (9) is provided on each of the top two sides of the extension platform (601) near the end of the magnetic induction coil (2). The first flange (103) of the processing part A (100) is engaged between the two first locking blocks (9). A first slot seat (8) is provided on the top of the base plate (6) and along its length. A second slot seat (10) is provided between the first locking block (9) and the first slot seat (8). The first slot seat (8) and the second slot seat (10) are coaxially arranged for the processing pipe part B (200) to be installed. A second locking block (11) is provided between the second slot seat (10) and the first locking block (8). A left fixing rod (12) and a right fixing rod (13) are provided on the side of the positioning base (6) near the base plate (7). A limiting block (14) with a through groove (141) is installed on the top of the positioning base (6) and is symmetrically arranged about the processing tube B (200). A clamping rod (15) with one end located inside the through groove (141) is elastically connected to the left fixing rod (12) and the right fixing rod (13) through an elastic member (16). The other end of the clamping rod (15) is located on both sides of the annular groove (102) of the processing part A (100), thereby clamping its second flange (104) with the second locking block (10). A fixing plate (17) with a cover plate (18) rotatably connected to the upper end is installed on one side of the base (5). The side of the cover plate (18) away from the fixing plate (17) can be fastened to the base (5). The top of the cover plate (18) is provided with a first through hole (19) and a second through hole (20). The line connecting the first through hole (19) and the second through hole (20) is parallel to the length direction of the processed pipe B (200). An upper pressure block (21) is set above the positioning base (6). The pin (22) and the second pin (23) pass through one end of the upper pressure block (21) and are correspondingly embedded in the first through hole (19) and the second through hole (20). The top end of the second pin (23) has a nail head (24). A spring (25) fitted on the outer wall of the second pin (23) is set between the nail head (24) and the upper pressure block (21). When the cover plate (18) is fastened to the base (5), the other end of the upper pressure block (21) is pressed against the top of the first flange (103). The first pin (22) and the second pin (23) are beveled pins, and the beveled planes of the first pin (22) and the second pin (23) are perpendicular to each other; a first stop screw (32) is embedded in the front end face of the cover plate (18) and abuts against the first pin (22) located inside the first through hole (19); a second stop screw (33) is embedded in the side end face of the cover plate (18) and abuts against the second pin (23) located inside the second through hole (20); The processing pipe B is installed on the first slot seat and the second slot seat and pressed by the cover plate. A lever (39) is provided on each of the opposite sides of the two clamping rods (14). The elastic element (15) is a right-angle tension spring.

2. The multi-workpiece induction welding device according to claim 1 or 2, characterized in that: A receiving groove (34) is provided between the second card block (11) and the second slot seat (10), and the receiving groove (34) allows a positioning clamp (35) to be detachably installed.

3. The multi-workpiece induction welding device according to claim 1, characterized in that: The induction welding device (1) is equipped with a display screen (40) and a control panel (41) with buttons. The display screen (40) is used to display the working status of the induction welding device (1) and the conveyor platform (3).

4. The multi-workpiece induction welding device according to claim 1, characterized in that: The first slot (7) and the second slot (10) are V-shaped slots.

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