An ultrasonic welding device suitable for clock spring and control method thereof

Abstract

The invention relates to the technical field of clock spring welding, in particular to an ultrasonic welding device suitable for clock springs and a control method thereof, comprising a welding platform, an ultrasonic welding machine fixedly installed on the top of the welding platform, and further comprising: a workbench, a limiting groove being provided on the top of the workbench; a rectangular shell arranged inside the limiting groove; a lateral drive unit, used for driving the rectangular shell to move lateraly; a position fine-tuning mechanism, arranged on the top of the rectangular shell, used for fine-tuning the position of a connector and a flat wire harness placed on one side of the rectangular shell; an end smoothing mechanism, arranged on one side of the position fine-tuning mechanism, used for pressing and smoothing the end of the flat wire harness; a controller first controls the position fine-tuning mechanism and the end smoothing mechanism to operate, adjusts the placement position of the connector and the flat wire harness before welding, and then controls the lateral drive unit and the ultrasonic welding machine to realize multiple welding processes.

Description

Technical Field

[0001] The invention relates to the field of clock spring welding, and in particular to an ultrasonic welding device suitable for clock springs and a control method thereof. Background Art

[0002] The flat wire harness in the clock spring is connected to the circuit board connector by ultrasonic welding. The ultrasonic welding machine generates high-frequency vibrations to form heat energy between the welding head and the copper wire on the flat wire harness, which causes partial melting of the welding point to form a strong connection. The flat wire harness contains multiple groups of copper wires waiting to be welded.

[0003] The welding between the flat wire harness and the connector is performed by the staff placing the flat wire harness inside the connector so that the copper wire on the flat wire harness is located at the welding position in the connector, and then placing the connector under the welding head in the welding device, controlling the welding head to move downward to complete the welding of one group of copper wires, and then manually pushing the connector to move, and moving the next group of copper wires waiting to be welded to the bottom of the welding head, and so on, until all the copper wires in the flat wire harness are welded to the connector. The existing welding device is not convenient for adjusting and limiting the position of the connector and the flat wire harness before welding. Manual adjustment by the staff will increase the labor intensity of the staff. Manual control of the distance adjustment will easily cause inaccurate position of each welding point, affecting the welding result. At the same time, during the manual movement, the flat wire harness is easily displaced due to shaking, affecting the accuracy of the welding point, thereby affecting the welding result. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose an ultrasonic welding device suitable for clock springs and a control method thereof.

[0005] In a first aspect, the present invention provides an ultrasonic welding device suitable for a clock spring, comprising a welding platform, an ultrasonic welding machine is fixedly installed on the top of the welding platform, and further comprising:

[0006] A workbench, fixedly mounted on the top of the welding platform, with a limiting groove on the top of the workbench;

[0007] A rectangular shell is arranged inside the limiting groove;

[0008] A lateral driving unit, used for driving the rectangular shell to move lateraly;

[0009] A plurality of suction cups are provided, wherein the plurality of suction cups are fixedly mounted on the side wall of the rectangular shell at equal intervals, and all of the suction cups are in communication with the interior of the rectangular shell;

[0010] A position fine-adjustment mechanism, disposed on the top of the rectangular shell, for fine-adjusting the position of the connector and the flat wiring harness placed on one side of the rectangular shell;

[0011] A pressure detection unit, used to obtain pressure information;

[0012] An end smoothing mechanism, arranged on one side of the position fine-tuning mechanism, is used to press and smooth the end of the flat wire harness;

[0013] The controller is arranged on the top of the welding platform. The controller is used to control the operation of the position fine-tuning mechanism and the end smoothing mechanism according to the pressure information detected by the pressure detection unit, adjust the placement position of the connector and the flat wire harness before welding, and then control the lateral drive unit and the ultrasonic welding machine to realize multiple welding processes.

[0014] Preferably, the lateral driving unit comprises:

[0015] A first electric cylinder is fixedly mounted inside the limiting groove, and an end of a piston rod of the first electric cylinder is fixedly connected to a side wall of the rectangular shell;

[0016] The controller is also used to control the operation of the first electric cylinder.

[0017] Preferably, the position fine-tuning mechanism comprises:

[0018] A second electric cylinder is fixedly mounted on the top of the rectangular shell;

[0019] A mounting plate fixedly connected to the end of the piston rod of the second electric cylinder;

[0020] A mounting frame fixedly connected below the end of the mounting plate;

[0021] The adjusting roller is rotatably mounted on the inner wall of the mounting frame.

[0022] Preferably, the position fine-tuning mechanism further includes:

[0023] A rack fixedly connected to the top of the rectangular shell;

[0024] A clearance opening is provided through the top of the mounting plate and is used for the rack to pass through;

[0025] A rotating shaft, rotatably connected to the side wall of the mounting frame;

[0026] A gear, fixedly connected to the end of the rotating shaft, the gear and the rack meshing with each other;

[0027] A rotating drum is fixedly connected to the surface of the rotating shaft, and the surface of the rotating drum is provided with four mounting grooves in a circumferential array;

[0028] There are four toggle plates, each end of which is provided with an arc surface, and the four toggle plates are slidably connected to the inside of the four mounting grooves respectively;

[0029] Four groups of first springs are respectively arranged inside the four installation grooves, and each group of first springs is provided with a plurality of first springs. One end of the first spring is fixedly connected to the groove wall of the installation groove, and the other end of the first spring is fixedly connected to the end of the toggle plate.

[0030] Preferably, the end smoothing mechanism comprises:

[0031] A rectangular frame fixedly connected to the side wall of the mounting plate;

[0032] A fixing seat, fixedly connected to the inner bottom surface of the rectangular frame;

[0033] Two sliding rods are symmetrically fixedly connected to the side walls of the fixing seat, and the ends of the two sliding rods are fixedly connected to the limiting plates;

[0034] Two sliding seats, the two sliding seats are slidably connected to the surfaces of the two sliding rods through two sliding holes respectively, and the inner walls of the sliding holes are in sealing contact with the surfaces of the sliding rods;

[0035] Two telescopic covers are symmetrically fixedly connected to the two sides of the rectangular frame, and the ends of the two telescopic covers are respectively fixedly connected to the side walls of the two sliding seats;

[0036] Two second springs are respectively sleeved on the surfaces of the two sliding rods, and two ends of each second spring are respectively fixedly connected to the adjacent sliding seat and the limiting plate;

[0037] Two fixed plates are respectively fixedly connected to the bottoms of the two sliding seats, and the side walls of the two fixed plates are rotatably connected with pressing rollers;

[0038] The gas filling mechanism is arranged on the top of the mounting plate and is used for conveying the gas inside the rectangular shell to the inside of the rectangular frame.

[0039] Preferably, the inflation mechanism includes an air pump, a first valve and a second valve. The air pump is fixedly mounted on the top of the mounting plate. The air inlet end of the air pump is fixedly connected to a hose, and the end of the hose is fixedly connected to the interior of the rectangular shell. The air outlet end of the air pump is fixedly connected to a connecting pipe, and the end of the connecting pipe is fixedly connected to the interior of the rectangular frame. The first valve is fixedly mounted on the top of the rectangular shell, and the second valve is fixedly mounted on the side wall of the rectangular frame.

[0040] Preferably, the pressure detection unit comprises a pressure sensor, and the pressure sensor is embedded on the inner top surface of the limiting groove.

[0041] In a second aspect, a control method for an ultrasonic welding device suitable for a clock spring is provided, the control method comprising the following steps:

[0042] After the pressure detection unit detects the pressure of the connector, it generates pressure information;

[0043] The pressure detection unit sends the pressure information to the controller to adjust the placement and welding of the connector and flat wire harness.

[0044] Preferably, the control method of the controller comprises the following steps:

[0045] The controller generates first control information and second control information after receiving the pressure information;

[0046] The controller sends the first control information to the second electric cylinder to drive the mounting plate to move downward, and adjusts the placement positions of the connector and the flat wire harness by adjusting the roller and the toggle plate;

[0047] The controller sends the second control information to the air pump to strengthen the inside of the rectangular frame, and the warped edges of the ends of the flat wire harness are smoothed by two pressing rollers moving in opposite directions.

[0048] Preferably, the control method of the controller further includes:

[0049] After receiving the pressure information, the controller also generates third control information and fourth control information;

[0050] The controller sends the third control information to the ultrasonic welding machine to control the ultrasonic welding machine to perform welding operation;

[0051] The controller sends fourth control information to the lateral driving unit to control the lateral movement of the rectangular shell.

[0052] Compared with the prior art, the present invention has the following beneficial effects:

[0053] 1. The controller controls the position fine-tuning mechanism to fine-tune the position of the connector and the flat wire harness placed on one side of the rectangular shell, so that the side wall of the connector is close to the multiple suction cups on one side of the rectangular shell, preparing for the subsequent lateral drive unit to drive the connector to move, and making the copper wire at the end of the flat wire harness completely move into the welding groove, and controlling the end smoothing mechanism to press and smooth the top end of the flat wire harness to avoid the situation where the end corner of the flat wire harness has warping and affects the welding result. After making preparations before welding, the ultrasonic welding machine is controlled by the controller to work, and the welding head of the ultrasonic welding machine moves down to weld the copper wire inside the welding groove. After welding one copper wire, the controller controls the lateral drive during the process of the welding head moving up. The unit drives the rectangular shell to move laterally a specified distance. With the assistance of the position fine-tuning mechanism, the connector with the flat wire harness inserted will move synchronously with the rectangular shell, and then the welding head of the ultrasonic welding machine will move down again to perform welding operation on the second copper wire. This process is repeated to complete the welding operation of several copper wires, that is, the welding operation between the flat wire harness and the connector is realized. The distance that the horizontal driving unit drives the rectangular shell to move each time is the spacing between each copper wire, which is conducive to ensuring that the copper wire waiting for welding can be moved to the bottom of the welding head of the ultrasonic welding machine each time, which is conducive to providing the accuracy of the welding position and avoiding the situation where the welding position is inaccurate due to errors caused by manually pushing the connector to adjust the copper wire position, which affects the welding result.

[0054] Second, when the connecting plate moves downward, the shaft connected to the gear will be driven downward. Since the gear and the rack are meshed with each other, the gear will rotate clockwise with the cooperation of the rack as the shaft moves downward, thereby driving the shaft connected to the rotating cylinder to rotate clockwise. Therefore, the rotating cylinder will rotate clockwise while moving downward. When the toggle plate inserted in the installation slot contacts the top of the flat wire harness, as the rotating cylinder continues to move downward and rotate, the toggle plate will compress the first spring and move into the installation slot under the top movement of the flat wire harness and the connector. After the first spring is compressed, it will move under its deformation support force. When the curved surface of the toggle plate passes through the top of the flat wire harness, it is helpful to increase the extrusion pressure between the curved surface of the toggle plate and the top of the flat wire harness. Therefore, as the rotating cylinder rotates clockwise and with the help of the extrusion pressure of the curved surface of the toggle plate, there will be a pushing force on the top of the flat wire harness, which is helpful to push the flat wire harness to the welding station of the connector, and fine-tune the position of the flat wire harness in the groove in the connector, so that the copper wire at the end of the flat wire harness moves further into the welding groove, avoiding the situation where the copper wire slips out of the welding groove and affects the welding result, which is helpful to improve the accuracy of the later welding position.

[0055] 3. The operation of the inflation mechanism is controlled by a controller to transport the gas inside the rectangular shell to the inside of the rectangular frame. Since the suction cups are interconnected with the inside of the rectangular shell, when the inflation mechanism is in operation, negative pressure is formed inside the multiple suction cups, thereby increasing the adsorption force between the suction cups and the connectors. As a result, the connectors can be driven to move stably with the help of the adsorption force of the suction cups during the movement of the rectangular shell. The gas transported to the inside of the rectangular frame will push the two sliding seats to move in opposite directions along the two sliding rods respectively. During the movement of the two sliding rods in opposite directions, the two fixed plates equipped with pressing rollers will be driven to move in opposite directions. During the movement of the two pressing rollers in opposite directions, the top of the flat wire harness will be pressed. Rolling toward the two corners and rolling the two pressing rollers in opposite directions is helpful to smooth the warped parts at the ends of the flat wire harness. The telescopic cover is extended and compressed as the sliding seat moves, maintaining the sealing state inside the rectangular frame. When the inflation mechanism completes the gas delivery, the two sliding seats respectively compress the second spring to stop moving in opposite directions. At this time, the two pressing rollers respectively stay at the corner edges of the flat wire harness to further press the warped edges of the corners. At the same time, with the help of the pressing of the two pressing rollers, it is helpful to maintain the specific position of the flat wire harness inside the placement slot unchanged when switching different welding positions in the later stage, and maintain the accuracy of the welding position. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0057] Figure 2 This is a schematic diagram of the top structure of the workbench of the present invention;

[0058] Figure 3 It is a schematic diagram of the connector and flat wiring harness structure of the present invention;

[0059] Figure 4 It is a schematic diagram of the local structure of the present invention;

[0060] Figure 5 For the present invention Figure 4 The enlarged structural diagram at A in the middle;

[0061] Figure 6 This is a schematic structural diagram of the connection between the rectangular shell and the suction cup of the present invention;

[0062] Figure 7 For the present invention Figure 6 The enlarged structural diagram at B in the middle;

[0063] Figure 8 It is a schematic diagram of the rectangular frame and the fixing seat structure of the present invention;

[0064] Fig. 9 This is a schematic diagram of the structure of the meshing of the rotating shaft and the gear of the present invention;

[0065] Fig.10This is a flow chart of the control method of the present invention.

[0066] In the figure: 1. welding platform; 2. ultrasonic welding machine; 3. workbench; 4. limit groove; 5. rectangular shell; 6. suction cup; 7. connector; 701. placement groove; 702. welding groove; 8. flat wire harness; 9. controller; 10. first electric cylinder; 11. second electric cylinder; 12. mounting plate; 13. mounting frame; 14. adjusting roller; 15. rack; 16. rotating shaft; 17. gear; 18. rotating drum; 1801. mounting groove; 19. toggle plate; 20. first spring; 21. rectangular frame; 22. fixed seat; 23. slide bar; 24. limit plate; 25. sliding seat; 26. telescopic cover; 27. second spring; 28. fixed plate; 29. ​​pressing roller; 30. air pump; 3001. hose; 3002. connecting pipe; 31. first valve; 32. second valve; 33. pressure sensor. DETAILED DESCRIPTION

[0067] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0068] like Figures 1 to 9 An ultrasonic welding device suitable for clock springs shown in the figure comprises a welding platform 1, an ultrasonic welding machine 2 is fixedly installed on the top of the welding platform 1, and further comprises:

[0069] The workbench 3 is fixedly mounted on the top of the welding platform 1, and a limiting groove 4 is provided on the top of the workbench 3;

[0070] A rectangular shell 5 is arranged inside the limiting groove 4;

[0071] A lateral driving unit, used for driving the rectangular shell 5 to move lateraly;

[0072] A plurality of suction cups 6 are provided, and the plurality of suction cups 6 are fixedly installed on the side wall of the rectangular shell 5 at equal intervals, and all the suction cups 6 are communicated with the interior of the rectangular shell 5;

[0073] A position fine-tuning mechanism, disposed on the top of the rectangular shell 5, for fine-tuning the position of the connector 7 and the flat wire harness 8 placed on one side of the rectangular shell 5;

[0074] A pressure detection unit, used to obtain pressure information;

[0075] An end smoothing mechanism, arranged on one side of the position fine-tuning mechanism, for pressing and smoothing the end of the flat wire harness 8;

[0076] The controller 9 is arranged on the top of the welding platform 1. The controller 9 is used to control the position fine-tuning mechanism and the end smoothing mechanism to operate according to the pressure information detected by the pressure detection unit, adjust the placement position of the connector 7 and the flat wire harness 8 before welding, and then control the lateral drive unit and the ultrasonic welding machine 2 to realize multiple welding processes; when working, it should be noted that the ultrasonic welding machine 2 is a welding machine in the prior art, and no further description is given here. The ultrasonic welding machine 2 is provided with a welding head, and the end of the flat wire harness 8 has multiple groups of copper wires waiting to be welded. The connector 7 is provided with a placement slot 701 and multiple welding slots 702 waiting to be welded. The staff inserts the flat wire harness 8 into the placement slot 7 01, and make multiple groups of copper wires respectively located in the corresponding welding grooves 702, and then the staff inserts the connector 7 with the flat wire harness 8 and pushes it along the limiting groove 4 to one side of the rectangular shell 5. It is difficult to ensure the accuracy of the welding position of each group of copper wires during the placement process. Therefore, when the staff places the connector 7 with the flat wire harness 8 on one side of the rectangular shell 5, the pressure detection unit detects the pressure of the connector 7 and the flat wire harness 8 on the limiting groove 4, and the pressure detection unit sends the pressure information to the controller 9. The controller 9 controls the position fine-tuning mechanism to fine-tune the position of the connector 7 and the flat wire harness 8 placed on one side of the rectangular shell 5, so that the side wall of the connector 7 is close to the multiple wires on one side of the rectangular shell 5. A suction cup 6 is provided to prepare for the subsequent lateral driving unit to drive the connector 7 to move, and the copper wire at the end of the flat wire harness 8 is completely moved into the welding groove 702, and the end smoothing mechanism is controlled to press and smooth the top end of the flat wire harness 8 to avoid the situation where the end corner of the flat wire harness 8 is warped and affects the welding result. After making preparations before welding, the ultrasonic welding machine 2 is controlled by the controller 9 to work, and the welding head of the ultrasonic welding machine 2 moves down to weld the copper wire inside the welding groove 702. After welding one copper wire, during the process of the welding head moving up, the controller 9 controls the lateral driving unit to drive the rectangular shell 5 to move laterally a specified distance, and the position fine-tuning mechanism With the assistance of , the connector 7 with the flat wire harness 8 inserted will move synchronously with the rectangular shell 5, and then the welding head of the ultrasonic welding machine 2 will move down again to perform welding operation on the second copper wire, and so on and so forth, to complete the welding operation of several copper wires, that is, to realize the welding operation between the flat wire harness 8 and the connector 7, and the distance that the lateral driving unit drives the rectangular shell 5 to move each time is the spacing between each copper wire, which is conducive to ensuring that the copper wire waiting for welding can be moved to the bottom of the welding head of the ultrasonic welding machine 2 each time, which is conducive to improving the accuracy of the welding position and avoiding the situation where the welding position is inaccurate due to errors caused by manual pushing of the connector 7 to adjust the position of the copper wire, which affects the welding result.

[0077] As an embodiment of the present invention, the lateral driving unit includes:

[0078] The first electric cylinder 10 is fixedly installed inside the limiting groove 4, and the end of the piston rod of the first electric cylinder 10 is fixedly connected to the side wall of the rectangular shell 5;

[0079] The controller 9 is also used to control the operation of the first electric cylinder 10; when working, the controller 9 controls the operation of the first electric cylinder 10, and the piston rod of the first electric cylinder 10 drives the rectangular shell 5 to move laterally along the inner wall of the limit groove 4. After each copper wire is welded, the first electric cylinder 10 drives the rectangular shell 5 to move a specified distance under the control of the controller 9, thereby automatically adjusting the position of the rectangular shell 5, thereby facilitating automatic adjustment of each welding position.

[0080] As an embodiment of the present invention, the position fine-tuning mechanism includes:

[0081] The second electric cylinder 11 is fixedly mounted on the top of the rectangular shell 5;

[0082] A mounting plate 12, fixedly connected to the end of the piston rod of the second electric cylinder 11;

[0083] A mounting frame 13, fixedly connected below the end of the mounting plate 12;

[0084] The adjusting roller 14 is rotatably mounted on the inner wall of the mounting frame 13; in the initial state, the piston rod of the second electric cylinder 11 props up the mounting plate 12, leaving enough space for the staff to place the connector 7. During operation, the controller 9 controls the operation of the second electric cylinder 11, and the piston rod of the second electric cylinder 11 drives the mounting plate 12 to move downward. During the downward movement of the mounting plate 12, the mounting frame 13 and the adjusting roller 14 are driven downward. If the connector 7 placed by the staff is not accurately at the specified position, the distance will generally not differ greatly, and only fine-tuning is required. As the adjusting roller 14 moves downward, the circumferential surface of the adjusting roller 14 will pass through the edge of the connector 7, and the circumferential curved surface of the adjusting roller 14 that moves downward will push the edge of the connector 7, which is conducive to pushing the connector 7 to one side of the rectangular shell 5, which is conducive to the side wall of the connector 7 and the suction cup 6 to fit, thereby fine-tuning the placement position of the connector 7, and facilitating the suction cup 6 to achieve stable adsorption of the side wall of the connector 7;

[0085] After the position of the connector 7 is adjusted, the adjusting roller 14 moves down to the lowest position on one side of the connector 7, and the surface of the adjusting roller 14 contacts the side wall of the connector 7. At this time, the connector 7 is stuck between the adjusting roller 14 and the multiple suction cups 6, which is conducive to synchronously pulling the connector 7 to move while the rectangular shell 5 drives the adjusting roller 14 to move horizontally with the help of the push of the adjusting roller 14.

[0086] As an embodiment of the present invention, the position fine-tuning mechanism further includes:

[0087] The rack 15 is fixedly connected to the top of the rectangular shell 5;

[0088] A clearance opening is formed through the top of the mounting plate 12 and is used for the rack 15 to pass through;

[0089] A rotating shaft 16 is rotatably connected to a side wall of the mounting frame 13;

[0090] The gear 17 is fixedly connected to the end of the rotating shaft 16, and the gear 17 and the rack 15 are meshed with each other;

[0091] The rotating drum 18 is fixedly connected to the surface of the rotating shaft 16, and the surface of the rotating drum 18 is provided with four mounting grooves 1801 in a circumferential array;

[0092] There are four toggle plates 19, each of which has an arc surface at its end. The four toggle plates 19 are slidably connected to the inside of the four mounting grooves 1801 respectively;

[0093] Four groups of first springs 20 are respectively arranged inside four installation grooves 1801, and each group of first springs 20 is provided with a plurality of first springs 20, one end of the first spring 20 is fixedly connected to the groove wall of the installation groove 1801, and the other end of the first spring 20 is fixedly connected to the end of the toggle plate 19; during work, when the staff inserts the multiple copper wires at the end of the flat wire harness 8 into the corresponding welding groove 702, it is easy to cause incomplete insertion after long-term work. The technical solution can solve the above problems. The specific implementation method is as follows. During the downward movement of the connecting plate, the rotating shaft 16 connected to the gear 17 will be driven to move downward. Since the gear 17 and the rack 15 are meshed with each other, therefore, during the process of the gear 17 moving downward with the rotating shaft 16, with the cooperation of the rack 15, the gear 17 is prompted to rotate clockwise, thereby driving the rotating shaft 16 connected to the rotating cylinder to rotate clockwise, so that the rotating cylinder will rotate clockwise while moving downward, and the toggle plate inserted inside the installation groove 1801 When 19 contacts the top of the flat wire harness 8, as the rotating cylinder continues to move downward and rotate, the toggle plate 19 will compress the first spring 20 and move it into the installation groove 1801 under the pushing of the flat wire harness 8 and the connector 7. After the first spring 20 is compressed, under its deformation support force, when the curved surface of the toggle plate 19 passes through the top of the flat wire harness 8, it is beneficial to increase the extrusion pressure between the curved surface of the toggle plate 19 and the top of the flat wire harness 8. Therefore, as the rotating cylinder itself rotates clockwise and with the help of the extrusion pressure of the curved surface of the toggle plate 19, there will be a pushing force on the top of the flat wire harness 8, which is beneficial to push the flat wire harness 8 to the welding station of the connector 7, and fine-tune the position of the flat wire harness 8 in the slot 701 in the connector 7, so that the copper wire at the end of the flat wire harness 8 moves further into the welding slot 702, thereby avoiding the situation where the copper wire slips out of the welding slot 702 and affects the welding result, thereby helping to improve the accuracy of the later welding position.

[0094] As an embodiment of the present invention, the end smoothing mechanism includes:

[0095] A rectangular frame 21 is fixedly connected to the side wall of the mounting plate 12;

[0096] A fixing seat 22, fixedly connected to the inner bottom surface of the rectangular frame 21;

[0097] Two slide bars 23 are symmetrically fixedly connected to the side walls of the fixing seat 22, and the ends of the two slide bars 23 are fixedly connected to the limiting plates 24;

[0098] Two sliding seats 25, the two sliding seats 25 are slidably connected to the surfaces of the two sliding rods 23 through two sliding holes respectively, and the inner walls of the sliding holes are in sealing contact with the surfaces of the sliding rods 23;

[0099] Two telescopic covers 26 are symmetrically fixedly connected to the two sides of the rectangular frame 21, and the ends of the two telescopic covers 26 are fixedly connected to the side walls of the two sliding seats 25 respectively;

[0100] Two second springs 27 are respectively sleeved on the surfaces of the two slide bars 23, and two ends of each second spring 27 are respectively fixedly connected to the adjacent slide seat 25 and the limit plate 24;

[0101] Two fixed plates 28 are respectively fixedly connected to the bottoms of the two sliding seats 25, and the side walls of the two fixed plates 28 are rotatably connected with pressing rollers 29;

[0102] The inflation mechanism is arranged on the top of the mounting plate 12, and is used to transport the gas inside the rectangular shell 5 to the inside of the rectangular frame 21; during operation, the end corners of the general flat wire harness 8 are prone to warping. If they are not smoothed before welding, it is easy to cause the welding position of the corner copper wire to be inaccurate. After the position of the connector 7 and the flat wire harness 8 is fine-tuned, since the rectangular frame 21 is connected to the side wall of the mounting plate 12, as the mounting plate 12 is moved down, the surfaces of the two pressing rollers 29 contact the top of the flat wire harness 8, and then the inflation mechanism is controlled by the controller 9 to operate, so that the gas inside the rectangular shell 5 is transported to the inside of the rectangular frame 21. Since the suction cup 6 is interconnected with the inside of the rectangular shell 5, when the inflation mechanism is operating, negative pressure will be formed inside the multiple suction cups 6, thereby increasing the adsorption force between the suction cup 6 and the connector 7, so that during the movement of the rectangular shell 5, the adsorption force of the suction cup 6 can be used to drive the connector 7 to move stably, and the gas transported to the inside of the rectangular frame 21 The two sliding seats 25 are pushed to move backwards along the two sliding bars 23 respectively. During the backward movement of the two sliding bars 23, the two fixed plates 28 equipped with pressing rollers 29 are driven to move backwards. During the backward movement of the two pressing rollers 29, the two pressing rollers 29 will roll toward the two corners at the top of the flat wire harness 8. The backward rolling of the two pressing rollers 29 is conducive to smoothing the warped parts of the ends of the flat wire harness 8. The telescopic cover 26 is extended and compressed as the sliding seat 25 moves, maintaining the sealing state inside the rectangular frame 21. When the inflation mechanism completes the gas delivery, the two sliding seats 25 compress the second spring 27 to stop moving backwards. At this time, the two pressing rollers 29 stay at the corner edges of the flat wire harness 8 respectively, further pressing the warped edges of the corners. At the same time, with the help of the pressing of the two pressing rollers 29, it is conducive to maintaining the specific position of the flat wire harness 8 inside the placement groove 701 unchanged when switching different welding positions in the later stage, and maintaining the accuracy of the welding position.

[0103] The two second springs 27 are set. When the inflation mechanism restores the air pressure balance inside the rectangular frame 21, the two second springs 27 are compressed and restored, thereby generating a driving force to push the two sliding seats 25 to return to their original positions, waiting for the next connector 7 and flat wiring harness 8 to be welded.

[0104] As an embodiment of the present invention, the inflation mechanism includes an air pump 30, a first valve 31 and a second valve 32. The air pump 30 is fixedly mounted on the top of the mounting plate 12. The air inlet end of the air pump 30 is fixedly connected to a hose 3001. The end of the hose 3001 is fixedly connected to the inside of the rectangular shell 5. The air outlet end of the air pump 30 is fixedly connected to a connecting pipe 3002. The end of the connecting pipe 3002 is fixedly connected to the inside of the rectangular frame 21. The first valve 31 is fixedly mounted on the top of the rectangular shell 5, and the second valve 32 is fixedly mounted on the side wall of the rectangular frame 21. When working, the air pump 30 is started by the controller 9, and the air pump 30 will inflate the inside of the rectangular shell 5. The inside of the rectangular shell 5 is evacuated to generate negative pressure, and the gas is transported to the inside of the rectangular frame 21, so that the pressure inside the rectangular frame 21 increases, thereby pushing the two sliding seats 25 to move back to back, and the warped parts of the ends of the flat wire harness 8 are smoothed with the help of the pressing roller 29 that moves synchronously therewith. After welding is completed, the air pressure balance inside the rectangular shell 5 and the rectangular frame 21 is restored by opening the first valve 31 and the second valve 32, and the adsorption of the connector 7 by the suction cup 6 is cancelled, so that the welded connector 7 and the flat wire harness 8 can be conveniently cancelled, and the compressed second spring 27 is conveniently restored, pushing the two sliding seats 25 to move toward each other and reset.

[0105] As an embodiment of the present invention, the pressure detection unit includes a pressure sensor 33, which is embedded in the inner top surface of the limit groove 4; when working, after the staff places the connector 7 on one side of the rectangular shell 5, the connector 7 will cause pressure on the pressure sensor 33, thereby sending the pressure information to the controller 9, and the controller 9 will send a series of control information after receiving the information.

[0106] like Fig.10 A control method for an ultrasonic welding device suitable for a clock spring is shown, and the control method comprises the following steps:

[0107] After the pressure detection unit detects the pressure of the connector 7, it generates pressure information;

[0108] The pressure detection unit sends the pressure information to the controller 9 to adjust the placement position of the connector 7 and the flat wire harness 8 and perform welding.

[0109] As an embodiment of the present invention, the control method of the controller 9 includes the following steps:

[0110] After receiving the pressure information, the controller 9 generates the first control information and the second control information;

[0111] The controller 9 sends the first control information to the second electric cylinder 11 to drive the mounting plate 12 to move downward, and adjusts the placement positions of the connector 7 and the flat wire harness 8 through the adjusting roller 14 and the toggle plate 19;

[0112] The controller 9 sends the second control information to the air pump 30 to strengthen the interior of the rectangular frame 21 and to smooth the warped edges of the ends of the flat wire harness 8 by means of two pressing rollers 29 moving in opposite directions.

[0113] As an embodiment of the present invention, the control method of the controller 9 further includes:

[0114] After receiving the pressure information, the controller 9 also generates third control information and fourth control information;

[0115] The controller 9 sends the third control information to the ultrasonic welding machine 2 to control the ultrasonic welding machine 2 to perform welding operation;

[0116] The controller 9 sends the fourth control information to the lateral driving unit to control the lateral movement of the rectangular housing 5 .

[0117] Working principle of the present invention: It should be noted that the ultrasonic welding machine 2 is a welding machine in the prior art and will not be described in detail here. A welding head is provided on the ultrasonic welding machine 2. There are multiple groups of copper wires waiting to be welded at the end of the flat wire harness 8. A placement groove 701 and multiple welding grooves 702 waiting to be welded are provided on the connector 7. The staff inserts the flat wire harness 8 into the placement groove 701 and makes multiple groups of copper wires respectively located in the corresponding welding grooves 702. Then the staff inserts the connector 7 with the flat wire harness 8 and pushes it along the limiting groove 4 to one side of the rectangular shell 5. During the placement process, it is difficult to ensure the welding position of each group of copper wires. Therefore, when the staff places the connector 7 with the flat wire harness 8 on one side of the rectangular shell 5, the pressure detection unit detects the pressure of the connector 7 and the flat wire harness 8 on the limit groove 4, and the pressure detection unit sends the pressure information to the controller 9. The controller 9 controls the position fine-tuning mechanism to fine-tune the position of the connector 7 and the flat wire harness 8 placed on one side of the rectangular shell 5, so that the side wall of the connector 7 is close to the multiple suction cups 6 on one side of the rectangular shell 5, preparing for the subsequent lateral driving unit to drive the connector 7 to move, and the copper wire at the end of the flat wire harness 8 is completely moved to the inside of the welding groove 702. The end smoothing mechanism is controlled to press and smooth the top end of the flat wire harness 8 to avoid the situation where the end corner of the flat wire harness 8 is warped and affects the welding result. After the preparation before welding, the ultrasonic welding machine 2 is controlled by the controller 9 to work. The welding head of the ultrasonic welding machine 2 moves down to weld the copper wire inside the welding groove 702. After welding a copper wire, when the welding head moves up, the controller 9 controls the lateral drive unit to drive the rectangular shell 5 to move laterally a specified distance. With the assistance of the position fine-tuning mechanism, the connector 7 with the flat wire harness 8 inserted will move synchronously with the rectangular shell 5. Move, and then the welding head of the ultrasonic welding machine 2 moves down again to perform welding operation on the second copper wire, and so on and so forth, to complete the welding operation of several copper wires, that is, to realize the welding operation between the flat wire harness 8 and the connector 7, and the distance that the lateral driving unit drives the rectangular shell 5 to move each time is the spacing between each copper wire, which is beneficial to ensure that the copper wire waiting for welding can be moved to the bottom of the welding head of the ultrasonic welding machine 2 each time, which is beneficial to improve the accuracy of the welding position and avoid the situation where the welding position is inaccurate due to errors caused by manual pushing of the connector 7 to adjust the position of the copper wire and the welding result is affected.

[0118] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention, and these changes and improvements fall within the scope of the present invention claimed.

Claims

1. An ultrasonic welding device suitable for clock springs, comprising a welding platform (1), an ultrasonic welding machine (2) being fixedly mounted on the top of the welding platform (1), characterized in that: Also includes: A workbench (3) is fixedly mounted on the top of the welding platform (1), and a limiting groove (4) is provided on the top of the workbench (3); A rectangular shell (5) arranged inside the limiting groove (4); A lateral drive unit, used for driving the rectangular shell (5) to move lateraly; A plurality of suction cups (6) are provided, and the plurality of suction cups (6) are fixedly mounted on the side wall of the rectangular shell (5) at equal intervals, and all of the suction cups (6) are in communication with the interior of the rectangular shell (5); A position fine-adjustment mechanism, arranged on the top of the rectangular shell (5), and used for fine-adjusting the position of the connector (7) and the flat wire harness (8) placed on one side of the rectangular shell (5); A pressure detection unit, used to obtain pressure information; An end smoothing mechanism, arranged on one side of the position fine-tuning mechanism, for pressing and smoothing the end of the flat wire harness (8); A controller (9) is arranged on the top of the welding platform (1). The controller (9) is used to control the position fine-tuning mechanism and the end smoothing mechanism to operate according to the pressure information detected by the pressure detection unit, so as to adjust the placement position of the connector (7) and the flat wire harness (8) before welding, and then control the lateral drive unit and the ultrasonic welding machine (2) to realize multiple welding processes; The position fine-tuning mechanism comprises: A second electric cylinder (11) is fixedly mounted on the top of the rectangular shell (5); A mounting plate (12) fixedly connected to the end of the piston rod of the second electric cylinder (11); A mounting frame (13) fixedly connected below the end of the mounting plate (12); An adjusting roller (14) rotatably mounted on the inner wall of the mounting frame (13); The end smoothing mechanism comprises: A rectangular frame (21) fixedly connected to a side wall of the mounting plate (12); A fixing seat (22) fixedly connected to the inner bottom surface of the rectangular frame (21); Two sliding rods (23) are symmetrically fixedly connected to the side walls of the fixing seat (22), and ends of the two sliding rods (23) are fixedly connected to the limiting plate (24); Two sliding seats (25), the two sliding seats (25) are slidably connected to the surfaces of the two sliding rods (23) through two sliding holes respectively, and the inner walls of the sliding holes are in sealing contact with the surfaces of the sliding rods (23); Two telescopic covers (26) are symmetrically fixedly connected to two sides of the rectangular frame (21), and ends of the two telescopic covers (26) are respectively fixedly connected to the side walls of the two sliding seats (25); Two second springs (27) are respectively sleeved on the surfaces of the two slide bars (23), and two ends of each second spring (27) are respectively fixedly connected to the adjacent slide seat (25) and the limit plate (24); Two fixed plates (28) are respectively fixedly connected to the bottoms of the two sliding seats (25), and pressing rollers (29) are rotatably connected to the side walls of the two fixed plates (28); An air charging mechanism is arranged on the top of the mounting plate (12) and is used to transport the gas inside the rectangular shell (5) to the inside of the rectangular frame (21).

2. The ultrasonic welding device for clock springs according to claim 1, characterized in that: The lateral driving unit comprises: A first electric cylinder (10) is fixedly mounted inside the limiting groove (4), and an end of a piston rod of the first electric cylinder (10) is fixedly connected to a side wall of the rectangular shell (5); The controller (9) is also used to control the operation of the first electric cylinder (10).

3. The ultrasonic welding device for clock springs according to claim 1, characterized in that: The position fine-tuning mechanism also includes: A rack (15) fixedly connected to the top of the rectangular shell (5); A clearance opening is formed through the top of the mounting plate (12) and is used for the rack (15) to pass through; A rotating shaft (16) rotatably connected to a side wall of the mounting frame (13); A gear (17) fixedly connected to the end of the rotating shaft (16), the gear (17) and the rack (15) being meshed with each other; A rotating drum (18) is fixedly connected to the surface of the rotating shaft (16), and the surface of the rotating drum (18) is provided with four mounting grooves (1801) in a circular array; Four toggle plates (19) are provided, and the ends of the toggle plates (19) are provided with arc-shaped surfaces, and the four toggle plates (19) are slidably connected inside the four mounting grooves (1801) respectively; Four groups of first springs (20) are respectively arranged inside the four installation grooves (1801), and each group of first springs (20) is provided with a plurality of first springs, one end of the first spring (20) is fixedly connected to the groove wall of the installation groove (1801), and the other end of the first spring (20) is fixedly connected to the end of the toggle plate (19).

4. The ultrasonic welding device for clock springs according to claim 1, characterized in that: The inflation mechanism comprises an air pump (30), a first valve (31) and a second valve (32); the air pump (30) is fixedly mounted on the top of the mounting plate (12); an air inlet end of the air pump (30) is fixedly connected to a hose (3001); an end of the hose (3001) is fixedly connected to the interior of the rectangular shell (5); an air outlet end of the air pump (30) is fixedly connected to a connecting pipe (3002); an end of the connecting pipe (3002) is fixedly connected to the interior of the rectangular frame (21); the first valve (31) is fixedly mounted on the top of the rectangular shell (5); and the second valve (32) is fixedly mounted on the side wall of the rectangular frame (21).

5. The ultrasonic welding device for clock springs according to claim 1, characterized in that: The pressure detection unit comprises a pressure sensor (33), and the pressure sensor (33) is embedded on the inner top surface of the limiting groove (4).

6. A control method for an ultrasonic welding device for a clock spring, applicable to the ultrasonic welding device for a clock spring of claim 4, characterized in that: The control method comprises the following steps: After the pressure detection unit detects the pressure of the connector (7), it generates pressure information; The pressure detection unit sends pressure information to the controller (9) to adjust the placement position of the connector (7) and the flat wire harness (8) and perform welding.

7. The control method of the ultrasonic welding device for clock spring according to claim 6, characterized in that: The control method of the controller (9) comprises the following steps: The controller (9) generates first control information and second control information after receiving the pressure information; The controller (9) sends the first control information to the second electric cylinder (11) to drive the mounting plate (12) to move downward, and the placement positions of the connector (7) and the flat wire harness (8) are adjusted by adjusting the roller (14) and the toggle plate (19); The controller (9) sends the second control information to the air pump (30) to achieve reinforcement of the interior of the rectangular frame (21), and to smooth the warped edges of the ends of the flat wire harness (8) through two pressing rollers (29) moving in opposite directions.

8. The control method of the ultrasonic welding device for clock springs according to claim 7, characterized in that: The control method of the controller (9) further includes: After receiving the pressure information, the controller (9) also generates third control information and fourth control information; The controller (9) sends the third control information to the ultrasonic welding machine (2) to control the ultrasonic welding machine (2) to perform a welding operation; The controller (9) sends fourth control information to the lateral drive unit to control the lateral movement of the rectangular shell (5).

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