Point position welding assembly of high-voltage connector and welding method and preparation method of point position welding assembly

Abstract

The invention discloses a point location welding assembly of a high-voltage connector and a welding method of the point location welding assembly, and relates to the field of high-voltage connectors. The point location welding assembly comprises a base, a first containing table is rotationally connected to the base, a second containing table is rotationally connected to the top of the first containing table, and a rotating shaft is fixed to the bottom of the second containing table; the rotating shaft penetrates out of the first placing table to reach the bottom of the base, a plurality of conductor clamping pieces arranged at equal angles are fixed to the first placing table, a plurality of power terminal clamping pieces arranged at equal angles are fixed to the second placing table, the number of the conductor clamping pieces is consistent with that of the power terminal clamping pieces, and a conductor feeding piece is arranged on the side face of the first placing table. A laser welding device fixed on the base is arranged close to the conductor feeding piece; the welding device is used for welding the conductor part and the power terminal in the high-voltage connector, automatic welding of the conductor part and the power terminal is achieved, the welding efficiency and the welding accuracy are improved, the welding part can be polished after welding, and the follow-up detection and maintenance workload is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of high-voltage connectors, and in particular to a point welding assembly of a high-voltage connector, a welding method thereof, and a preparation method thereof. Background Art

[0002] High-voltage connectors are extremely important components of new energy vehicles and are used in both complete vehicles and charging facilities. High-voltage connectors consist of plugs and sockets. The power terminals in the plug are connected to the power terminals in the socket to achieve high-voltage line access.

[0003] At present, most of the power terminals in the plug are cylindrical reed terminals machined from a circular shape, and the cable is pressed into the cavity of the reed terminal using a crimping device.

[0004] The existing reed terminals use a crimping method to connect cables. After long-term use, the crimping force between the reed terminal and the cable weakens, and unstable contact is prone to occur. In addition, since the circumferential side wall of the reed terminal is in contact with the cable, it is also easy to induce the skin effect of the current, resulting in high resistance and heat at the connection between the reed terminal and the cable.

[0005] Therefore, in the prior art, the above-mentioned crimping method is improved to a welding method for connecting the power terminal and the conductor part inside the cable. For example, Chinese patent CN202310282469.8 provides a high-voltage connector, including a plug and a socket, the plug including a plug shell and a first power terminal, the socket including a socket shell and a second power terminal; the first power terminal is arranged in the plug shell, the first power terminal is flat, the first power terminal has a connecting part, the connecting part is plate-shaped, the conductor part of the cable is welded on the connecting part, and the conductor part of the cable is flat; the second power terminal is arranged in the socket shell, the second power terminal corresponds to the first power terminal one by one, and there is at least one second power terminal; when the plug shell is inserted into the socket shell, the second power terminal is in contact with at least one side wall of the first power terminal.

[0006] However, if manual welding is used for the welding connection between the power terminal and the conductor part, due to the small precision size of the parts, the welding efficiency and accuracy are low after the human body takes them and clamps them. Therefore, a welding mechanism is needed to handle the welding process between the power terminal and the conductor part. Summary of the invention

[0007] The present invention is used for welding the conductor part and the power terminal in the high-voltage connector, can automatically perform feeding and welding, is driven by two servo motors, intermittently feeds the materials, and performs welding during the feeding intervals, thereby realizing automatic welding of the conductor part and the power terminal, improving welding efficiency and welding accuracy, and polishing the welding parts after welding, reducing the workload of subsequent inspection and maintenance.

[0008] To achieve the above object, the present invention provides the following technical solutions: A point welding assembly for a high-voltage connector, the assembly includes a base, a first placement table is rotatably connected to the base, a second placement table is rotatably connected to the top of the first placement table, a rotating shaft is fixed to the bottom of the second placement table, the rotating shaft passes through the first placement table to the bottom of the base, a plurality of conductor clamps arranged at equal angles are fixed to the first placement table, a plurality of power terminal clamps arranged at equal angles are fixed to the second placement table, the number of conductor clamps is consistent with that of power terminal clamps, a conductor feed piece is provided on the side of the first placement table, and a laser welder fixed to the base is provided near the conductor feed piece.

[0009] As a preferred solution of the present invention: the conductor clamping member includes a guide seat fixed on the first placement platform, a baffle is fixed inside the guide seat, the baffles are symmetrically arranged, and an elastic card is fixed on one side of the baffle.

[0010] As a preferred solution of the present invention: the conductor feeding part includes a feeding track fixed on the base, an entry groove is provided on one side of the feeding track, a feeding track is provided on the side of the entry groove, a cylinder is fixed inside the feeding track, the cylinder is electrically connected to a laser beam switch, the laser beam switch includes a laser emitting end fixed on the end of the feeding track facing the guide seat, a laser receiving end is embedded in the end of the guide seat facing the feeding track, the feeding track is driven to rotate by an external driving device, and the driving device is connected in series with the cylinder.

[0011] As a preferred solution of the present invention: the power terminal clamping piece includes a clamping piece fixed on the second placement table, the clamping pieces are arranged in groups of two, and a power terminal is fixed inside each group of clamping pieces. A TPU elastomer protrusion is fixed on the inner wall of the clamping piece, and several TPU elastomer protrusions are arranged along the length direction of the clamping piece.

[0012] As a preferred solution of the present invention: a first gear is fixed to the side of the first placement table, a first half gear is meshed with the side of the first gear, the first half gear is connected to a first servo motor, and the first servo motor is fixed on the base.

[0013] As a preferred solution of the present invention: a second gear is fixed to the rotating shaft, a second half gear is meshed on the side of the second gear, the second half gear is connected to a second servo motor, and the second servo motor is fixed on the base.

[0014] As a preferred solution of the present invention: an annular groove is provided on the first placement platform, the annular groove is located between the power terminal clamp and the conductor clamp, a scraper is fixed on the base, the scraper is in contact with the inside of the annular groove away from the base end, and a lead-out groove is connected to the side of the annular groove.

[0015] As a preferred solution of the present invention: a support is also fixed on the first placement table, a support plate is fixed on the end of the support away from the first placement table, the support plate covers the annular groove, a plurality of polishing balls are rotatably connected inside the support plate, and the surface of the polishing balls is covered with a frosted layer.

[0016] The present invention also provides a point welding method for a high-voltage connector, using the above-mentioned point welding assembly for a high-voltage connector, comprising the following steps: ①. Place the conductor inside the high-voltage connector inside the feeding track, place the power terminal inside the clamping piece, clamp the power terminal in all the clamping pieces on the second placement table, and place the power terminal manually; ②. Turn on the first servo motor and the second servo motor. The first servo motor drives the first placement table to rotate intermittently, and the second servo motor drives the second placement table to rotate intermittently. ③. When the guide seat rotates to the bottom of the laser welder, the laser beam switch receives the signal, controls the cylinder and the feeding track to open, and after the conductor part on the feeding track enters the feeding track, the cylinder drives it to slide into the guide seat; ④. The conductor part entering the guide seat is clamped by an elastic card and limited by a baffle to enter a fixed state; ⑤. At the same time, the second servo motor drives the clamping piece to stop, and the power terminal inside the clamping piece contacts the conductor part, and laser welding begins; ⑥. With the continued driving of the first servo motor and the second servo motor, the guide seat starts to rotate again, and at the same time, the laser shooting switch electrical signal is turned off, and the cylinder is reset, waiting for the next guide seat to move under the laser welder. The completed welded guide seat continues to rotate and pass through the support plate; ⑦. Grind the welding position by grinding the ball to remove the excess welded metal blocks; ⑧. Collect the welded conductors and power terminals manually after passing through the support plate.

[0017] To sum up, the beneficial technical effects of the present invention are as follows: the present invention is used for welding the conductor part and the power terminal in the high-voltage connector, can automatically load and weld, is driven by two servo motors, loads intermittently, and welds during the feeding intervals, thereby realizing the automatic welding of the above-mentioned conductor part and the power terminal, improving welding efficiency and welding accuracy, and the welding part can be polished after welding to reduce the workload of subsequent inspection and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification, but do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a structural schematic diagram of a point welding assembly of a high-voltage connector in this embodiment; Figure 2 This is a point welding assembly of a high-voltage connector of this embodiment. Figure 1 Schematic diagram from another perspective; Figure 3 This is a schematic diagram of the bottom of a base of a point welding assembly of a high-voltage connector in this embodiment; Figure 4 This is a point welding assembly of a high-voltage connector of this embodiment. Figure 3 Side view diagram; Figure 5 This is a point welding assembly of a high-voltage connector of this embodiment. Figure 1 The enlarged schematic diagram at A in the middle; Figure 6 This is a point welding assembly of a high-voltage connector of this embodiment. Figure 2 Enlarged schematic diagram of point B in the middle.

[0019] In the figure, 1. base; 2. first placement table; 3. second placement table; 4. rotating shaft; 5. laser welder; 6. guide seat; 7. baffle; 8. elastic card; 9. feeding track; 10. entry slot; 11. feeding track; 12. cylinder; 13. laser beam switch; 14. clamping piece; 15. TPU elastomer protrusion; 16. first gear; 17. first half gear; 18. first servo motor; 19. second gear; 20. second half gear; 21. second servo motor; 22. annular groove; 23. scraper; 24. guide slot; 25. support; 26. support plate; 27. polishing sphere. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figure 1-6The present invention provides a technical solution: a point welding assembly for a high-voltage connector, the assembly includes a base 1, a first placement table 2 is rotatably connected to the base 1, a second placement table 3 is rotatably connected to the top of the first placement table 2, a rotating shaft 4 is fixed to the bottom of the second placement table 3, the rotating shaft 4 passes through the first placement table 2 to the bottom of the base 1, a plurality of conductor clamps arranged at equal angles are fixed to the first placement table 2, a plurality of power terminal clamps arranged at equal angles are fixed to the second placement table 3, the number of conductor clamps and power terminal clamps is consistent, a conductor feed piece is provided on the side of the first placement table 2, and a laser welder 5 fixed to the base 1 is provided near the conductor feed piece.

[0023] In this embodiment, the provided point welding assembly is mainly used for welding the conductor part and the power terminal in the high-voltage connector, wherein the conductor part has a shielding ring block outside, and the welding point between the front end of the conductor part and the power terminal is a flat metal connection.

[0024] Specifically, the conductor clamp is used to clamp and fix the conductor part. The conductor clamp includes a guide seat 6 fixed on the first placement table 2. A baffle 7 is fixed inside the guide seat 6. The baffle 7 is symmetrically arranged. An elastic card 8 is fixed on one side of the baffle 7. The elastic card 8 adopts a spring sheet and is used to fix the conductor part. At the same time, the elastic card 8 is located on the side of the baffle 7. After the conductor part enters the guide seat 6, the baffle 7 can contact the shielding ring block outside the conductor part to prevent the conductor part from continuing to move forward. At the same time, the elastic card 8 contacts the side of the shielding ring block to completely fix the conductor part. The part extending out of the guide seat 6 is the welding point to ensure accurate welding.

[0025] Among them, the conductor feeding part includes a feeding track 9 fixed on the base 1, an entry groove 10 is provided on one side of the feeding track 9, a feeding crawler 11 is provided on the side of the entry groove 10, a cylinder 12 is fixed inside the feeding track 9, the cylinder 12 is electrically connected to a laser beam switch 13, the laser beam switch 13 includes a laser emitting end fixed to the end of the feeding track 9 facing the guide seat 6, and a laser receiving end is embedded in the end of the guide seat 6 facing the feeding track 9. The feeding crawler 11 is driven to rotate by an external driving device, and the driving device is connected in series with the cylinder 12. A plurality of conductor parts are placed on the feeding crawler 11, and the placement spacing is The product value of the rotation rate of the feeding track 11 and the welding dwell time, when the guide seat 6 and the feeding track 9 are kept in a straight line state, the laser receiving end inside the guide seat 6 corresponds to the laser emitting end, and then the cylinder 12 is controlled to open, and the feeding track 11 is controlled to open at the same time. After the feeding track 11 is opened, the several conductor parts placed on it enter the feeding track 9 one by one along the entry groove 10, and the feeding track 9 can only accommodate one conductor part to pass through. Therefore, after the feeding track 9 is placed on the conductor part, it can be driven by the cylinder 12 to move against it, and then driven to move to the inside of the guide seat 6 for clamping and fixing.

[0026] The power terminal clamp is used for clamping the power terminal. The power terminal clamp includes a clamping piece 14 fixed on the second placement table 3. The clamping pieces 14 are arranged in groups of two. A power terminal is fixed inside each group of clamping pieces 14. A TPU elastomer protrusion 15 is fixed to the inner wall of the clamping piece 14. Several TPU elastomer protrusions 15 are arranged along the length direction of the clamping piece 14. The power terminal is placed between the two clamping pieces 14 and clamped and fixed by the TPU elastic protrusion. When placed, ensure that the front end welding part is completely extended out of the end of the clamping piece 14.

[0027] Specifically, the driving method of the first placement table 2 and the second placement table 3 is as follows: a first gear 16 is fixed to the side of the first placement table 2, a first half gear 17 is meshed with the side of the first gear 16, the first half gear 17 is connected to a first servo motor 18, and the first servo motor 18 is fixed on the base 1; a second gear 19 is fixed to the rotating shaft 4, a second half gear 20 is meshed with the side of the second gear 19, the second half gear 20 is connected to a second servo motor 21, and the second servo motor 21 is fixed on the base 1.

[0028] Furthermore, after the first servo motor 18 is turned on, the first servo motor 18 can drive the first half gear 17 to rotate. When the first half gear 17 rotates to the meshing state of the first gear 16, the first placement table 2 can be driven to rotate. At the same time, after the second servo motor 21 is turned on, the second servo motor 21 can drive the second half gear 20 to rotate. When the second half gear 20 rotates to the meshing state of the second gear 19, the second placement table 3 can be driven to rotate. In this embodiment, the first servo motor 18 and the second servo motor 21 have the same rotation direction in the initial state, and keep the first placement table 2 and the second placement table 3 rotating synchronously, keep the second servo motor 21 priority, and ensure that the power terminal and the welding part of the conductor part conflict.

[0029] Furthermore, a support 25 is fixed on the first placement table 2, and a support plate 26 is fixed on the end of the support 25 away from the first placement table 2, and the support plate 26 covers the annular groove 22. A number of polishing balls 27 are rotatably connected inside the support plate 26, and the surface of the polishing balls 27 is covered with a frosted layer, wherein the frosted layer has the same function as the existing frosted paper, and then when the guide seat 6 rotates to the bottom of the support plate 26, as the guide seat 6 continues to rotate, the conductor part and the power terminal thereon contact with the polishing ball 27, thereby driving the polishing ball 27 to rotate, and the frosted layer on the polishing ball 27 is used to polish the welding part to ensure the flatness of the welding part.

[0030] In addition, an annular groove 22 is provided on the first placement table 2, and the annular groove 22 is located between the power terminal clamping part and the conductor clamping part. A scraper 23 is fixed on the base 1, and the end of the scraper 23 away from the base 1 is in contact with the inside of the annular groove 22. The side of the annular groove 22 is connected with a lead-out groove 24. When the first placement table 2 rotates, since the scraper 23 is in a fixed state, the scraper 23 and the first placement table 2 rotate relative to each other, and the scraper 23 is used to scrape off the metal residue left after welding in the annular groove 22, thereby cleaning the welding position, and the metal residue can be collected through the lead-out groove 24.

[0031] In the present invention, the specific welding method comprises the following steps: ①. Place the conductor part inside the high-voltage connector inside the feeding track 11, place the power terminal inside the clamping piece 14, clamp the power terminal in all the clamping pieces 14 on the second placement table 3, and place the power terminal manually; ②. Turn on the first servo motor 18 and the second servo motor 21. The first servo motor 18 drives the first placement table 2 to rotate intermittently, and the second servo motor 21 drives the second placement table 3 to rotate intermittently; ③. When the guide seat 6 rotates to the bottom of the laser welder 5, the laser beam switch 13 receives the signal, controls the cylinder 12 and the feeding track 11 to open, and after the conductor part on the feeding track 11 enters the feeding track 9, the cylinder 12 drives it to slide into the guide seat 6; ④. The conductor part entering the guide seat 6 is clamped by the elastic card 8 and limited by the baffle 7 to enter a fixed state; ⑤. At the same time, the second servo motor 21 is driven to stop the clamping piece 14, and the power terminal inside the clamping piece 14 contacts the conductor part, and laser welding begins; ⑥. With the continued driving of the first servo motor 18 and the second servo motor 21, the guide seat 6 starts to rotate again, and at the same time, the electrical signal of the laser beam switch 13 is turned off, and the cylinder 12 is reset, waiting for the next guide seat 6 to move under the laser welder 5, and the completed welded guide seat 6 continues to rotate and pass through the support plate 26; ⑦. Grind the welding position by grinding the ball 27 to remove the excess welded metal block; ⑧. After passing through the support plate 26, the welded conductor parts and power terminals are manually collected.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A point welding assembly for a high voltage connector, characterized in that: The component comprises a base (1), a first placement platform (2) being rotatably connected to the base (1), a second placement platform (3) being rotatably connected to the top of the first placement platform (2), a rotation shaft (4) being fixed to the bottom of the second placement platform (3), the rotation shaft (4) passing through the first placement platform (2) to the bottom of the base (1), a plurality of conductor clamps arranged at equal angles being fixed to the first placement platform (2), a plurality of power terminal clamps arranged at equal angles being fixed to the second placement platform (3), the number of conductor clamps being the same as the number of power terminal clamps being arranged, a conductor feed piece being provided on the side of the first placement platform (2), and a laser welder (5) fixed to the base (1) being provided near the conductor feed piece.

2. A point welding assembly of a high voltage connector and a welding method thereof according to claim 1, characterized in that: The conductor clamping member comprises a guide seat (6) fixed on the first placement platform (2), a baffle (7) is fixed inside the guide seat (6), the baffles (7) are symmetrically arranged, and an elastic card (8) is fixed on one side of the baffle (7).

3. A point welding assembly of a high voltage connector and a welding method thereof according to claim 2, characterized in that: The conductor feeder comprises a feed track (9) fixed on a base (1), an entry slot (10) being provided on one side of the feed track (9), a feed track (11) being provided on the side of the entry slot (10), a cylinder (12) being fixed inside the feed track (9), the cylinder (12) being electrically connected to a laser beam switch (13), the laser beam switch (13) comprising a laser emitting end fixed on the end of the feed track (9) facing the guide seat (6), a laser receiving end being embedded on the end of the guide seat (6) facing the feed track (9), the feed track (11) being driven to rotate by an external drive device, the drive device being connected in series with the cylinder (12).

4. The point welding assembly of a high-voltage connector and the welding method thereof according to claim 1, characterized in that: The power terminal clamping piece comprises a clamping piece (14) fixed on the second placement platform (3), the clamping pieces (14) are arranged in groups of two, one power terminal is fixed inside each group of clamping pieces (14), a TPU elastic body protrusion (15) is fixed on the inner wall of the clamping piece (14), and a plurality of TPU elastic body protrusions (15) are arranged along the length direction of the clamping piece (14).

5. The point welding assembly of a high voltage connector and the welding method thereof according to claim 1, characterized in that: A first gear (16) is fixed on the side of the first placement platform (2), a first half gear (17) is meshed with the side of the first gear (16), the first half gear (17) is connected to a first servo motor (18), and the first servo motor (18) is fixed on the base (1).

6. A point welding assembly of a high voltage connector and a welding method thereof according to claim 1, characterized in that: The rotating shaft (4) is fixed with a second gear (19), a second half gear (20) is meshed on the side of the second gear (19), the second half gear (20) is connected with a second servo motor (21), and the second servo motor (21) is fixed on the base (1).

7. A point welding assembly of a high voltage connector and a welding method thereof according to claim 1, characterized in that: The first placement platform (2) is provided with an annular groove (22), the annular groove (22) being located between the power terminal clamp and the conductor clamp, a scraper (23) is fixed on the base (1), the end of the scraper (23) away from the base (1) abuts against the inside of the annular groove (22), and a guide groove (24) is connected to the side of the annular groove (22).

8. A point welding assembly of a high voltage connector and a welding method thereof according to claim 7, characterized in that: A support (25) is also fixed on the first placement table (2), and a support plate (26) is fixed on the end of the support (25) away from the first placement table (2), the support plate (26) covers the annular groove (22), and a plurality of grinding balls (27) are rotatably connected inside the support plate (26), and the surface of the grinding balls (27) is covered with a frosted layer.

9. A method for spot welding of a high voltage connector, using the spot welding assembly of the high voltage connector according to claim 1, characterized in that: The following steps are involved: ①. Place the conductor part inside the high-voltage connector inside the feeding track (11), place the power terminal inside the clamping piece (14), clamp the power terminal in all the clamping pieces (14) on the second placement table (3), and manually place the power terminal; ②. Turn on the first servo motor (18) and the second servo motor (21), the first servo motor (18) drives the first placement table (2) to rotate intermittently, and the second servo motor (21) drives the second placement table (3) to rotate intermittently; ③. When the guide seat (6) rotates to the bottom of the laser welder (5), the laser beam switch (13) receives a signal and controls the cylinder (12) and the feeding track (11) to open. After the conductor part on the feeding track (11) enters the feeding track (9), the cylinder (12) drives it to slide into the guide seat (6); ④. The conductor part entering the guide seat (6) is clamped by the elastic card (8) and limited by the baffle (7) to enter a fixed state; ⑤. At the same time, the second servo motor (21) is driven to stop the clamping piece (14), and the power terminal inside the clamping piece (14) contacts the conductor part, and laser welding begins; ⑥. As the first servo motor (18) and the second servo motor (21) continue to drive, the guide seat (6) begins to rotate again, and at the same time, the electrical signal of the laser beam switch (13) is turned off, and the cylinder (12) is reset, waiting for the next guide seat (6) to move to the bottom of the laser welder (5), and the completed welded guide seat (6) continues to rotate and passes the support plate (26); ⑦. Grind the welding position by grinding the ball (27) to remove the excess welded metal; ⑧. After passing through the support plate (26), the welded conductor parts and power terminals are manually collected.

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