Liquid-cooled ultrasonic welding machine system and welding method

Abstract

The present invention relates to a liquid-cooled ultrasonic welding machine system and a welding method, including a machine body, wherein the machine body is provided with: a workbench, a clamping mechanism is provided on the workbench, a bottom anvil is provided in the middle of the workbench, the clamping mechanism includes at least one pair of movable chucks and a driving mechanism for driving the chucks to move respectively, a clamping portion is formed between the chucks and the bottom anvil for placing the workpiece to be welded; a first liquid-cooling cavity is provided on the chuck; a second liquid-cooling cavity is provided at the bottom of the clamping portion; a frame is provided on the upper part of the workbench, an ultrasonic welding head and a lifting device are provided in the frame, the ultrasonic welding head can be lifted and lowered, corresponding to the clamping portion below, and the workpiece in the clamping portion is welded, and a liquid cooling block is also provided on the frame. The liquid-cooled ultrasonic welding machine system described in the present invention has comprehensive cooling and good cooling effect, which is sufficient for the ultrasonic equipment to continuously weld.

Description

Technical Field

[0001] The invention relates to the field of ultrasonic welding equipment, in particular to a liquid-cooled ultrasonic welding system and a welding method. Background Art

[0002] Ultrasonic welding uses high-frequency vibration waves to transmit to the surfaces of two objects to be welded. Under pressure, the two surfaces of the objects rub against each other to form a fusion between the molecular layers. It has a fast welding speed and high welding strength. It does not require the addition of solder, and replaces traditional welding and crimping processes. It is low-cost, clean and pollution-free.

[0003] When ultrasonic equipment is welding workpieces, the high-frequency vibration of the ultrasonic welding head causes the temperature of the ultrasonic welding head and the bottom mold to rise too high, which can easily cause damage to the workpiece, deteriorate the welding effect, and even cause the welding machine equipment to malfunction, forcing it to stop working and cool down. For this reason, it is necessary to cool down the ultrasonic welding head, the bottom mold, and the workpiece fixture to avoid affecting the vibration characteristics of the ultrasonic welding head and affecting the welding effect. Therefore, it is necessary to provide a cooling solution for the ultrasonic welding head to solve the above problems and meet the continuous welding work of the ultrasonic equipment. Summary of the invention

[0004] In order to overcome the above problems, the present invention provides a liquid-cooled ultrasonic welding machine system, which has comprehensive cooling and good cooling effect, and is sufficient for the ultrasonic equipment to continue welding work.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a liquid-cooled ultrasonic welding machine system, including a machine body, wherein the machine body is provided with:

[0006] The workbench is provided with a clamping mechanism and an anvil is provided in the middle of the workbench.

[0007] The clamp mechanism includes at least one pair of movable chucks and driving mechanisms for driving the chucks to move respectively. A clamping portion is formed between the chuck and the bottom anvil, which is used to place the workpiece to be welded and clamp / release the workpiece to be welded; the chuck is provided with a first liquid cooling cavity to cool the chuck; the bottom anvil of the clamping portion is provided with a second liquid cooling cavity to cool the bottom anvil;

[0008] The frame is arranged on the upper part of the workbench, and an ultrasonic welding head is arranged in the frame. The ultrasonic welding head can be raised and lowered to correspond to the clamping part below to weld the workpiece in the clamping part. The frame is also provided with a liquid cooling mechanism, and a liquid cooling block is arranged on the liquid cooling mechanism. The liquid cooling mechanism can drive the liquid cooling block to be close to or separated from the ultrasonic welding head, so that the ultrasonic welding head can be raised and lowered and the welding work can be performed after being separated from the liquid cooling block.

[0009] Preferably, the first liquid-cooling cavity, the second liquid-cooling cavity and the liquid-cooling block are respectively provided with a water inlet pipe and a water outlet pipe on the side for continuous circulation cooling of the liquid.

[0010] Preferably, the driving mechanism comprises a first driving mechanism for pushing the chuck to slide the chuck to clamp / release the workpiece to be welded.

[0011] Preferably, the driving mechanism further comprises a second driving mechanism for lifting the clamping mechanism so that the chuck has a longitudinal movement during the movement process and the chuck can move up and down.

[0012] Preferably, a welding head driving mechanism for driving the ultrasonic welding head to rise and fall is arranged in the frame.

[0013] Preferably, the liquid cooling mechanism also includes a clamping mechanism for controlling the liquid cooling block, side plates are respectively provided on both sides of the clamping mechanism, and the liquid cooling blocks are respectively installed on the side plates. The clamping mechanism drives the side plates to move so that the liquid cooling block is tightly attached to or separated from the ultrasonic welding head. The clamping mechanism is a double-rod cylinder, and side plates are respectively provided on both sides of the double rod.

[0014] Preferably, the clamp mechanism also includes a clamp table, a chuck is installed on the clamp table, a guide rail groove is provided on the clamp table, the chuck is installed in the guide rail groove and slides in the guide rail groove; the first driving mechanism is installed on one side of the clamp table; the clamp table can be raised and lowered on the workbench.

[0015] Preferably, a guide seat is provided at the front end of the second driving mechanism, and the second driving mechanism pushes the guide seat to move laterally, and the guide seat is provided with an inclined guide groove; a positioning guide shaft is provided at the bottom of the clamp table, and the positioning guide shaft is inserted into the inclined guide groove, and the guide seat changes the position of the positioning guide shaft in the inclined guide groove by movement, and when the positioning guide shaft is located at the high point of the inclined guide groove, the clamp mechanism is in a raised state; when the positioning guide shaft is located at the low point of the inclined guide groove, the clamp mechanism is in a lowered state; when the clamp mechanism is in the lowered state, the upper end surface of the clamp table is flush with the workbench.

[0016] Preferably, a limiting mechanism is further included, and the limiting mechanism is arranged on the clamp table, and the limiting mechanism can accurately control the opening and closing distance of the clamp.

[0017] The present invention also provides a welding method, comprising the following steps:

[0018] S1. Place the workpiece terminal on the bottom anvil of the clamping part;

[0019] S2, start the driving mechanism, the first driving mechanism and the second driving mechanism are started, the chuck moves from outside to inside and descends at the same time, and the chuck clamps or presses the workpiece terminal;

[0020] S3, placing the wiring harness in the clamping portion, the wiring harness being located above the workpiece terminal;

[0021] S4, start welding, the clamping mechanism is released and lifted, that is, the liquid cooling block leaves the ultrasonic welding head, the ultrasonic welding head descends, and ultrasonic welding is performed on the workpiece terminal and the wiring harness;

[0022] S5. After welding is completed, the welding head is lifted, and the liquid cooling block is lowered and clamped to cool the welding head;

[0023] S6, the chuck is released, and the chuck rises and moves from inside to outside;

[0024] S7. Repeat step S1.

[0025] Among them, in steps 1-7, the liquid in the first liquid-cooling cavity, the second liquid-cooling cavity, and the liquid-cooling block is circulated through a liquid cooler to cool down.

[0026] The beneficial effects of the present invention are: a liquid-cooled ultrasonic welding machine system, applied to the welding of workpiece terminals and wire harnesses, can continuously perform ultrasonic welding on the terminals and wire harnesses, dissipate heat and cool down in time, and the liquid cooling medium in the liquid cooling block quickly and circulates away the heat, so that the welding machine system can continue to work, greatly improving the work efficiency, wherein the work table, the fixture, and the welding head respectively have liquid cooling blocks for contact cooling, and the liquid cooling block is in intermittent contact with the welding head through a clamping mechanism, and only when the ultrasonic welding head is suspended, the contact cooling is performed during the process of replacing the welding work, which does not affect the work of the ultrasonic welding head, and prevents the temperature accumulation and heating of the contact part between the terminal and the core wire, resulting in oxidation, stress relaxation and other consequences. In addition, the chuck can be used to clamp the terminal, and can also be used to clamp the terminal with a large width, and has high adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0028] Figure 1 It is a schematic diagram of the overall structure of the liquid-cooled ultrasonic welding machine system of the present invention;

[0029] Figure 2 It is a schematic cross-sectional structure diagram of the liquid-cooled ultrasonic welding machine system of the present invention;

[0030] Figure 3 It is a schematic diagram of the structure of the clamp mechanism of the liquid-cooled ultrasonic welding machine system of the present invention;

[0031] Figure 4 The present invention Figure 3 A schematic cross-sectional structure diagram of a clamping mechanism;

[0032] Figure 5 It is a schematic diagram of the internal component structure of the frame of the liquid-cooled ultrasonic welding machine system of the present invention;

[0033] Figure 6 It is a schematic diagram of the side structure of the internal components of the frame of the liquid-cooled ultrasonic welding machine system described in the present invention. Description of the drawings:

[0035] 1. Machine body, 11. Workbench, 12. Frame, 2. Chuck, 21. First drive mechanism, 211. First drive mechanism, 22. Fixture table, 221. Guide rail groove, 222. Positioning guide shaft, 23. Guide seat, 231. Inclined guide groove, 31. First liquid cooling cavity, 32. Second liquid cooling cavity, 33. Liquid cooling block, 34. Water inlet pipe, 35. Water outlet pipe, 4. Ultrasonic welding head, 5. Telescopic shaft, 51. Side plate. DETAILED DESCRIPTION

[0036] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0037] Example 1

[0038] like Figure 1-4 The liquid-cooled ultrasonic welding machine system shown has three sets of liquid cooling mechanisms in the machine body 1, which can cool the workpiece fixture, the placement platform, and the ultrasonic welding head 4, dissipate heat and cool the equipment and the workpiece in time, and ensure continuous welding of the ultrasonic equipment.

[0039] The machine body 1 includes a workbench 11 and a frame 12, and each working part is installed on the workbench 11 and the frame 12 respectively:

[0040] A workbench 11 is provided with a clamping mechanism, which includes at least one pair of movable chucks 2, and a clamping portion is formed between the chucks 2 for placing the workpiece to be welded; wherein a first liquid cooling cavity 31 is provided on the chuck 2, and the first liquid cooling cavity 31 is installed on the outside of the chuck 2 to dissipate heat and cool the chuck 2. A second liquid cooling cavity 32 is provided at the bottom of the clamping portion, and the second liquid cooling cavity 32 is located on the bottom surface of the workbench 11 and at the bottom of the workpiece to dissipate heat and cool the workpiece.

[0041] The clamping portion on the workbench 11 is provided with a corresponding fixture / holder for placing the workpiece.

[0042] The frame 12 is extended upward from the workbench 11, and an ultrasonic welding head 4 is installed in the frame 12. The ultrasonic welding head 4 can be raised and lowered to correspond to the clamping part below, and welds the workpiece in the clamping part after being lowered. A liquid cooling block 33 is also arranged on the frame 12. In this embodiment, the lifting device is a lifting cylinder, which adopts pneumatic lifting.

[0043] Among them, the first liquid cooling cavity 31, the second liquid cooling cavity 32 and the liquid cooling block 33 are all provided with liquid cooling cavities inside, and the outer sides are all provided with water inlet pipes 34 and water outlet pipes 35 for liquid circulation cooling. The water inlet pipe 34 is connected to an external water pump to drive the circulation of the coolant.

[0044] In this embodiment, an ultrasonic generating device for driving the ultrasonic horn to work is disposed in the frame, and a horn driving mechanism 41 for driving the ultrasonic horn to rise and fall is disposed in the frame.

[0045] The driving mechanism includes a first driving mechanism 21, which is used to push the chuck 2 to slide the chuck 2 to clamp / loosen the workpiece to be welded, clamp for welding, and loosen for replacement.

[0046] Specifically, the clamping mechanism also includes a clamping table 22, the chuck 2 is installed on the clamping table 22, a guide groove 221 is provided on the clamping table 22, the chuck 2 is installed in the guide groove 221 and slides in the guide groove 221; the first driving mechanism 21 is installed on one side of the clamping table; and the clamping table 22 can be raised and lowered and installed on the workbench 11.

[0047] The driving mechanism also includes a second driving mechanism 211 for lifting the clamping mechanism. The clamping head 2 has a longitudinal movement during the movement process, so that the clamping head can move up and down.

[0048] In this embodiment, the clamp mechanism is pneumatically driven by a cylinder.

[0049] See also Figure 4 A guide seat 23 is provided at the front end of the second driving mechanism 211, and the second driving mechanism 211 pushes the guide seat 23 to move horizontally. The guide seat 23 is provided with an inclined guide groove 231; a positioning guide shaft 222 is provided at the bottom of the clamp table 22, and the positioning guide shaft 222 is inserted into the inclined guide groove 231. The guide seat 23 changes the position of the positioning guide shaft 222 in the inclined guide groove 231 by moving. When the positioning guide shaft 222 is located at the high point of the inclined guide groove 231, the clamp mechanism is in a raised state; when the positioning guide shaft 231 is located at the low point of the inclined guide groove, the clamp mechanism is in a lowered state; when the clamp mechanism is in the lowered state, the upper end surface of the clamp table 22 is flush with the workbench.

[0050] The fixture table 22 is horizontally limited to the workbench 11, and the fixture table 22 can move along the vertical direction of the workbench 11. Specifically, a longitudinal rail (not shown) can be provided between the fixture table 22 and the workbench 11.

[0051] In this embodiment, the chuck 2 moves forward and downward in the process of clamping the workpiece, and vice versa, moves backward and upward; when used in the welding process of the terminal and the wire harness, the chuck 2 can clamp the terminal and the wire harness so that the wire harness and the terminal are confined in the clamping part for ultrasonic welding. In some cases, the terminal width is too large, and the chuck 2 presses the terminal in the process of moving forward and downward, and confines the wire harness to the upper end of the terminal for ultrasonic welding. The chuck 2 can be used to clamp the terminal, and can also be used to compress the terminal of large width, and has high adaptability.

[0052] See also Figure 5 , 6 , a clamping mechanism is also provided on the frame 12, and the clamping mechanism is a double-rod cylinder, and a telescopic shaft 5 is provided on both sides of the double-rod cylinder; the liquid cooling block 33 is a pair, which is respectively provided on the telescopic shaft 5 on both sides, and the outer ends of the two telescopic shafts 5 are respectively provided with side plates 51 for installing the liquid cooling block 33, and the installation positions of the two liquid cooling blocks 33 correspond to the two sides of the ultrasonic welding head 4, respectively. After the ultrasonic welding head 4 is raised, the telescopic shaft 5 shrinks, so that the two liquid cooling blocks 33 are attached to the two sides of the ultrasonic welding head 4 for heat dissipation; when the ultrasonic welding head 4 descends, the telescopic shaft 5 opens and separates from the ultrasonic welding head 4, so that the ultrasonic welding head 4 can descend. When the ultrasonic welding head 4 finishes working, the liquid cooling block 33 dissipates heat and cools the ultrasonic welding head 4, so that the ultrasonic welding head 4 can quickly enter the welding of the next workpiece. The ultrasonic welding head 4 in this embodiment is a full-wave welding head.

[0053] The system of this embodiment includes a limit mechanism 6, and the fixture table has a limit mechanism 6, which can accurately control the opening and closing distance of the clamp. The limit mechanism 6 is a knob adjustment mechanism.

[0054] Example 2

[0055] The welding method of the liquid-cooled ultrasonic welding machine system comprises the following steps:

[0056] S1. Place the workpiece terminal on the bottom anvil of the clamping part;

[0057] S2, start the driving mechanism, the first driving mechanism and the second driving mechanism are started, the chuck moves from outside to inside and descends at the same time, and the chuck clamps or presses the workpiece terminal;

[0058] S3, placing the wiring harness in the clamping portion, the wiring harness being located above the workpiece terminal;

[0059] S4, start welding, the clamping mechanism is released and lifted, that is, the liquid cooling block leaves the ultrasonic welding head, the ultrasonic welding head descends, and ultrasonic welding is performed on the workpiece terminal and the wiring harness;

[0060] S5. After welding is completed, the welding head is lifted, and the liquid cooling block is lowered and clamped to cool the welding head;

[0061] S6, the chuck is released, and the chuck rises and moves from inside to outside;

[0062] S7. Repeat step S1.

[0063] Among them, in steps 1-7, the liquid in the first liquid-cooling cavity, the second liquid-cooling cavity, and the liquid-cooling block is circulated through a liquid cooler to cool down.

[0064] The liquid-cooled ultrasonic welding machine system and welding method described in the present invention are applied to the welding of workpiece terminals and wiring harnesses, and can continuously perform ultrasonic welding on the terminals and wiring harnesses, dissipate heat and cool down in time, and the liquid cooling medium in the liquid cooling block quickly and circulates away the heat, so that the welding machine system can continue to work, greatly improving the work efficiency, wherein the work table, the clamp, and the welding head respectively have liquid cooling blocks for contact cooling, and the liquid cooling block is in intermittent contact with the welding head through a clamping mechanism, and only when the ultrasonic welding head is suspended, the contact cooling is performed during the process of replacing the welding work, which does not affect the work of the ultrasonic welding head, and prevents the temperature accumulation and heating of the contact part between the terminal and the core wire, resulting in oxidation, stress relaxation and other consequences. In addition, the clamp can be used to clamp the terminal, and can also be used to compress the terminal with a large width, and has high adaptability.

[0065] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A liquid-cooled ultrasonic welding machine system, comprising a machine body, characterized in that: The machine body is provided with: The workbench is provided with a clamping mechanism and an anvil is provided in the middle of the workbench. The clamp mechanism includes at least one pair of movable chucks and driving mechanisms for driving the chucks to move respectively. A clamping portion is formed between the chuck and the bottom anvil, which is used to place the workpiece to be welded and clamp / release the workpiece to be welded; the chuck is provided with a first liquid cooling cavity to cool the chuck; the bottom anvil of the clamping portion is provided with a second liquid cooling cavity to cool the bottom anvil; A frame is arranged on the upper part of the workbench, an ultrasonic welding head is arranged in the frame, the ultrasonic welding head can be raised and lowered, corresponding to the clamping part below, and welds the workpiece in the clamping part, and a liquid cooling mechanism is also arranged on the frame, a liquid cooling block is arranged on the liquid cooling mechanism, and the liquid cooling mechanism can drive the liquid cooling block to be in close contact with or separated from the ultrasonic welding head, so that the ultrasonic welding head can be raised and lowered and welded after being separated from the liquid cooling block; The driving mechanism includes a first driving mechanism for pushing the chuck to slide the chuck and clamp / release the workpiece to be welded; the driving mechanism also includes a second driving mechanism for lifting the clamp mechanism so that the chuck has a longitudinal movement during the movement process and the chuck can move up and down; The liquid cooling mechanism also includes a clamping mechanism for controlling the liquid cooling block, and side plates are respectively arranged on both sides of the clamping mechanism, and the liquid cooling blocks are respectively installed on the side plates, and the clamping mechanism drives the side plates to move, so that the liquid cooling block and the ultrasonic welding head are closely attached to or separated; The clamp mechanism also includes a clamp table, the clamp head is installed on the clamp table, a guide rail groove is provided on the clamp table, the clamp head is installed in the guide rail groove and slides in the guide rail groove; the first driving mechanism is installed on one side of the clamp table; the clamp table can be lifted and lowered on the workbench; A guide seat is provided at the front end of the second driving mechanism, and the second driving mechanism pushes the guide seat to move laterally, and the guide seat is provided with an inclined guide groove; a positioning guide shaft is provided at the bottom of the clamp table, and the positioning guide shaft is inserted into the inclined guide groove, and the guide seat changes the position of the positioning guide shaft in the inclined guide groove by movement, and when the positioning guide shaft is located at the high point of the inclined guide groove, the clamp mechanism is in a raised state; when the positioning guide shaft is located at the low point of the inclined guide groove, the clamp mechanism is in a lowered state; when the clamp mechanism is in the lowered state, the upper end surface of the clamp table is flush with the workbench.

2. A liquid-cooled ultrasonic welding machine system according to claim 1, characterized in that: The first liquid cooling cavity, the second liquid cooling cavity, and the liquid cooling block are respectively provided with a water inlet pipe and a water outlet pipe on the side for continuous circulation cooling of the liquid.

3. The liquid-cooled ultrasonic welding machine system according to claim 1, characterized in that: A welding head driving mechanism for driving the ultrasonic welding head to rise and fall is arranged in the frame.

4. The liquid-cooled ultrasonic welding machine system according to claim 1, characterized in that: It also includes a limiting mechanism, which is arranged on the clamp table and can accurately control the opening and closing distance of the clamp.

5. A welding method according to any one of claims 1 to 4, characterized in that: The steps include: S1. Place the workpiece terminal on the bottom anvil of the clamping part; S2, start the driving mechanism, the first driving mechanism and the second driving mechanism are started, the chuck moves from outside to inside and descends at the same time, and the chuck clamps or presses the workpiece terminal; S3, placing the wiring harness in the clamping portion, the wiring harness being located above the workpiece terminal; S4, start welding, the clamping mechanism is released and lifted, that is, the liquid cooling block leaves the ultrasonic welding head, the ultrasonic welding head descends, and ultrasonic welding is performed on the workpiece terminal and the wiring harness; S5. After welding is completed, the welding head is lifted, and the liquid cooling block is lowered and clamped to cool the welding head; S6, the chuck is released, and the chuck rises and moves from inside to outside; S7, repeat step S1; Among them, in steps 1-7, the liquid in the first liquid-cooling cavity, the second liquid-cooling cavity, and the liquid-cooling block is circulated through a liquid cooler to cool down.

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