A multi-station ultrasonic welding device

Abstract

This invention discloses a multi-station ultrasonic welding device for use in the field of ultrasonic welding equipment. When welding samples are large batches of materials with fixed dimensions, this solution arranges multiple workers to install the welding fixture and the welding sample. After installation, the welding fixture and the welding sample are placed on the conveyor for transportation. This ensures that multiple conveyor boats waiting for welding work are present on the conveyor at the same time. Through simple personnel allocation, continuous and efficient ultrasonic welding work can be achieved. The magnetic sample boat paired with the welding fixture can be quickly replaced according to the size of the welding sample to adapt to welding samples of different sizes. At the same time, if the magnetic sample boat is excessively worn during use, it can be replaced in time, which can significantly reduce the difficulty and cost of replacement.

Description

Technical Field

[0001] This invention relates to the field of ultrasonic welding equipment, and in particular to a multi-station ultrasonic welding device. Background Technology

[0002] Ultrasonic welding utilizes high-frequency vibration waves transmitted to the surfaces of two objects to be welded. Under pressure, the surfaces rub against each other, causing fusion between molecular layers. It is a special method of joining similar or dissimilar metals using the mechanical vibration energy of ultrasonic frequencies (above 16kHz), effectively overcoming phenomena such as spatter and oxidation that occur during resistance welding. Ultrasonic metal welding machines can perform single-point welding, multi-point welding, and short strip welding of thin wires or sheets of non-ferrous metals such as copper, silver, aluminum, and nickel. Ultrasonic welding is often chosen for welding thin metal sheets in lithium batteries.

[0003] The invention application with publication number CN119116374A discloses a multi-station ultrasonic welding device, in which multiple ultrasonic welding components and their corresponding bottom mold components rotate with the turntable around the rotating shaft, and weld the coil formed by connecting multiple workpieces end to end in a rotating manner. Under the premise of ensuring the same welding strength, welding can be carried out at a faster speed, thereby improving production efficiency.

[0004] Existing multi-station ultrasonic welding equipment uses a turntable conveyor to transport multiple objects simultaneously when welding them. However, turntable conveyors generally occupy a relatively large space and have a low effective space utilization rate. In addition, the ultrasonic welding equipment usually needs to be stopped during the installation and disassembly of the objects being welded, making it impossible to perform ultrasonic welding work continuously and efficiently. Summary of the Invention

[0005] The core of this invention lies in solving the problem of the inability to perform continuous and efficient ultrasonic welding of samples of the same size in the prior art through a welding fixture. Simultaneously, by setting up an adjustment unit, the position of the magnetic sample boat loaded with the sample is automatically adjusted, thereby enabling continuous ultrasonic welding of samples of different sizes.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A multi-station ultrasonic welding device includes a conveying section. A frame is fixedly connected to the upper end of the conveying section. The frame includes a frame, and a pair of matching telescopic rods are fixedly connected to the opposite inner sides of the frame. A limit key is fixedly connected to the end of the two telescopic rods that are close to each other. A pressure sensor is fixedly connected to the end of the limit key that is close to the telescopic rod. A compression spring is fixedly connected between the frame and the pressure sensor, and the compression spring is set on the outside of the telescopic rod. Multiple ultrasonic welding units are fixedly connected to the upper inner side wall of the frame. A conveying boat is placed on the upper side of the conveying unit. The conveying boat includes a boat body. A limiting groove matching the limiting key is carved on the side wall of the boat body. The end of the limiting key away from the telescopic rod is provided with a rounded corner. When the conveying boat is conveyed, it first contacts the rounded corner of the limiting key. An arc-shaped sliding groove matching the rounded corner is provided in the limiting groove. Multiple welding fixtures are placed inside the conveying boat. Multiple welding samples are stacked inside the welding fixtures. Continuous and efficient ultrasonic welding work can be achieved through simple personnel allocation.

[0008] Furthermore, the welding fixture includes a fixing unit, which contains a matching holding platform. A pair of matching movable molds are placed on the holding platform, and a sample slot is provided between the two movable molds. Multiple welding samples matching the fixture are placed in the sample slot.

[0009] Furthermore, a buffer pad is fixedly connected to the end of the limit key away from the pressure sensor. The buffer pad is made of elastic and wear-resistant material, and the end of the buffer pad away from the limit key has a frosted surface. The buffer pad can help the conveyor boat quickly overcome inertia and stop accurately after the conveyor section stops.

[0010] Furthermore, the distance between two adjacent conveyor boats on the conveyor section is greater than three times the width of the conveyor boat, making it less likely for two adjacent conveyor boats to collide when the conveyor section stops.

[0011] Meanwhile, multiple welding fixtures are placed inside the conveyor boat. Each welding fixture includes a fixing unit, which contains a matching holding platform. A magnetic sample boat is placed on the upper end of the holding platform, and multiple welding samples are placed inside the magnetic sample boat. An adjustment groove is carved inside the holding platform, and a cover plate is fixedly connected to the opening of the adjustment groove. A low-speed motor is fixedly connected to the upper end of the cover plate, and an adjustment unit is fixedly connected to the power output end of the low-speed motor. The adjustment unit includes a fixed sleeve that is fixedly connected to a low-speed motor. A rotating arm is fixedly connected to the side wall of the fixed sleeve. A sliding groove is cut into the fixed sleeve and extends into the rotating arm. A slider is slidably connected inside the rotating arm. A magnetic adsorption unit is fixedly connected to the upper end of the slider and magnetically adsorbs the magnetic sample boat. A compression spring is fixedly connected between the slider and the inner wall of the sliding groove, and the compression spring is located on the side of the slider away from the fixed sleeve.

[0012] Furthermore, a safety groove is carved into the upper end of the second holding platform, and the magnetic sample boat is placed in the safety groove, making it difficult for the magnetic sample boat to slide out from the upper end of the second holding platform.

[0013] Furthermore, the safety groove is chiseled with cross-shaped grooves intersecting the axis of the low-speed motor's power output end, which are used for manual fine-tuning of the position of the magnetic sample boat, making the position of the magnetic sample boat more precise.

[0014] Furthermore, a sliding rod is fixedly connected to the inner wall of the sliding groove. The sliding rod passes through the slider and the second compression spring. The sliding rod protects the second compression spring, making it less likely to fail due to non-working deformation.

[0015] Compared with the prior art, the advantages of this invention are: When welding samples are large batches of materials with fixed dimensions, this solution arranges multiple workers to install the welding fixture and welding samples. After the welding fixture and welding samples are installed, they are placed on the conveyor for transportation. This ensures that there are multiple conveyor boats waiting for welding work on the conveyor at the same time. Through simple personnel allocation, continuous and efficient ultrasonic welding work can be achieved.

[0016] The magnetic sample boat that is paired with welding fixture two can be quickly replaced according to the size of the welding sample to accommodate welding samples of different sizes. At the same time, if the magnetic sample boat wears excessively during use, it can be replaced in time, which can greatly reduce the difficulty and cost of replacement. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the multi-station ultrasonic welding device according to the first embodiment of the present invention; Figure 2 This is a schematic diagram of the conveying section and frame of the multi-station ultrasonic welding apparatus according to the first embodiment of the present invention; Figure 3 for Figure 2 Schematic diagram of the structure at point A; Figure 4 This is a schematic diagram of the structure of the transport boat of the present invention; Figure 5 This is a schematic diagram of the structure of a welding fixture according to the first embodiment of the present invention; Figure 6 This is a cross-sectional structural schematic diagram of a welding fixture according to the first embodiment of the present invention; Figure 7 This is a schematic diagram of the conveying section and frame of the multi-station ultrasonic welding device according to the second embodiment of the present invention; Figure 8This is a schematic diagram of the structure of the welding fixture 2 according to the second embodiment of the present invention; Figure 9 This is a cross-sectional structural diagram of the welding fixture 2 according to the second embodiment of the present invention; Figure 10 This is a schematic diagram of the adjustment unit according to the second embodiment of the present invention; Figure 11 This is a cross-sectional structural diagram of the adjustment unit according to the second embodiment of the present invention.

[0018] Explanation of the labels in the diagram: 1. Conveying unit; 2. Frame; 201. Frame; 202. Telescopic rod; 203. Limiting key; 204. Buffer pad; 205. Pressure sensor; 206. Compression spring one; 3. Ultrasonic welding unit; 4. Conveying boat; 401. Boat body; 402. Limiting groove; 5. Welding fixture one; 501. Fixing unit one; 502. Holding platform one; 503. Movable mold; 6. Welding sample; 7. Welding fixture two; 701. Fixing unit two; 702. Holding platform two; 703. Adjustment groove; 704. Low-speed motor; 705. Cover plate; 8. Adjustment unit; 801. Fixing sleeve; 802. Rotating arm; 803. Sliding groove; 804. Sliding rod; 805. Slider; 806. Compression spring two; 807. Magnetic adsorption unit; 9. Magnetic sample boat. Detailed Implementation

[0019] The technical solutions will now be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention.

[0020] First implementation method: Please see Figures 1-4 A multi-station ultrasonic welding device includes a conveying section 1, which provides transmission power through its conveying rollers. A frame 2 is fixedly connected to the upper end of the conveying section 1. The frame 2 includes a frame 201. A pair of matching telescopic rods 202 are fixedly connected to the opposite inner surfaces of the frame 201. A limit key 203 is fixedly connected to the end of each telescopic rod 202 that is close to each other. A pressure sensor 205 is fixedly connected to the end of the limit key 203 that is close to the telescopic rod 202. A compression spring 206 is fixedly connected between the frame 201 and the pressure sensor 205, and the compression spring 206 is sleeved on the outside of the telescopic rod 202. A plurality of ultrasonic welding units 3 are fixedly connected to the upper inner wall of the frame 201. The ultrasonic welding unit 3 includes a robotic arm and an ultrasonic welding head that can be mounted in the vertical direction. A conveying boat 4 is placed on the upper side of the conveying unit 1. The conveying boat 4 includes a boat body 401. A limiting groove 402 matching the limiting key 203 is carved on the side wall of the boat body 401. The end of the limiting key 203 away from the telescopic rod 202 is provided with a rounded corner. When the conveying boat 4 is conveyed, it first contacts the rounded corner of the limiting key 203. An arc-shaped sliding groove matching the rounded corner is provided in the limiting groove 402. Multiple welding fixtures 5 are placed in the conveying boat 4. Multiple welding samples 6 are stacked in the welding fixtures 5.

[0021] by Figure 1 For example, when ultrasonically welding welding sample 6, the operator assembles welding sample 6 onto welding fixture 5, and then places welding fixture 5 into conveyor boat 4. Since the dimensions of welding fixture 5 can be pre-planned, the positions of multiple sets of welding samples 6 are matched with multiple ultrasonic welding units 3. The movement direction of conveyor boat 4 on conveyor unit 1 is as follows: Figure 1 As indicated by the arrow, when the conveyor boat 4 moves to the lower side of the frame 2, the limiting key 203 will extend into the limiting groove 402. The two limiting keys 203 will make a fine adjustment to the position of the conveyor boat 4, so that the ultrasonic welding unit 3 is in the center of the conveying section 1. The positions of multiple ultrasonic welding units 3 and welding samples 6 are more easily matched one-to-one. As the conveyor boat 4 continues to move, the limiting key 203 will slide out of the limiting groove 402 under the action of its own rounded corners and the arc-shaped sliding groove of the limiting groove 402. At this time, the compression deformation of the compression spring 206 reaches its maximum, and the pressure on the pressure sensor 205 also reaches its maximum value, which is related to the specific size of the conveyor boat 4. When the pressure sensor 205 detects that the pressure has reached its maximum value, the conveying section 1 stops working, the conveyor boat 4 stops directly below the ultrasonic welding unit 3, and the ultrasonic welding unit 3 is started to perform ultrasonic welding work to weld multiple sets of welding samples 6.

[0022] The frame 2 is equipped with a control terminal, which is connected to the conveying unit 1, the ultrasonic welding unit 3 and the pressure sensor 205. The detection data of the pressure sensor 205 is uploaded to the control terminal in real time. The control terminal controls the operation of the conveying unit 1 and the ultrasonic welding unit 3 according to the real-time data. The specific signal connection and control method are well known to those skilled in the art. Those skilled in the art can make reasonable designs based on the existing technology to meet the practical requirements of this application.

[0023] When the welding sample 6 is a thin sheet of metal in a lithium battery, the welding sample 6 is a material with a fixed size in large batches. During the continuous welding process, multiple workers can be arranged to install the welding fixture 5 and the welding sample 6. After the welding fixture 5 and the welding sample 6 are installed, they are placed on the conveyor 1 for transportation. This can ensure that there are multiple sets of conveyor boats 4 waiting for welding work on the conveyor 1 at the same time. Through simple personnel allocation, continuous and efficient ultrasonic welding work can be achieved.

[0024] Please see Figures 5-6 The welding fixture 5 includes a fixing unit 501, a holding platform 502 that matches itself is placed inside the fixing unit 501, a pair of matching movable molds 503 are placed on the holding platform 502, a sample slot is provided between the two movable molds 503, and multiple welding samples 6 that match itself are placed in the sample slot.

[0025] By using different movable molds 503, welding samples 6 of different sizes and shapes can be accommodated, so that welding work can be carried out smoothly.

[0026] A buffer pad 204 is fixedly connected to the end of the limit key 203 away from the pressure sensor 205. The buffer pad 204 is made of elastic and wear-resistant material, and the end of the buffer pad 204 away from the limit key 203 has a frosted surface. When the conveying part 1 stops, the buffer pad 204 can increase the friction force, helping the conveying boat 4 to quickly overcome inertia and stop accurately.

[0027] To compensate for the delay in signal transmission and mechanical action, the dimensions of the limiting groove 402 can be precisely designed so that the conveyor boat 4 can stop precisely at the preset welding position by inertia after the stop signal is triggered. This makes it easier to match the positions of the ultrasonic welding unit 3 and the welding sample 6. This is a well-known technology to those skilled in the art, and those skilled in the art can obtain the optimal dimensions by conducting experiments and calculations based on the existing technology. Therefore, it is not disclosed in detail in this application.

[0028] The distance between two adjacent conveyor boats 4 on the conveyor section 1 is greater than three times the width of the conveyor boat 4 in the transmission direction on the conveyor section 1. This avoids multiple conveyor boats 4 being too densely packed. When the conveyor section 1 stops working, it is less likely that the conveyor boat 4 will collide with the conveyor boat 4 located directly below the ultrasonic welding unit 3 under the action of inertia. This will not affect the normal positioning of the ultrasonic welding unit 3 and the welding sample 6.

[0029] Second implementation method: Please see Figures 7-11The conveyor boat 4 contains multiple welding fixtures 2 7. Each welding fixture 2 7 includes a fixing unit 2 701. The fixing unit 2 701 contains a matching holding platform 2 702. A magnetic sample boat 9 is placed on the upper end of the holding platform 2 702. Multiple welding samples 6 are placed in the magnetic sample boat 9. An adjustment groove 703 is carved in the holding platform 2 702. A cover plate 705 is fixedly connected to the opening of the adjustment groove 703. The cover plate 705 and the holding platform 2 702 are fixedly connected by a snap fastener. A low-speed motor 704 is fixedly connected to the upper end of the cover plate 705. An adjustment unit 8 is fixedly connected to the power output end of the low-speed motor 704. The adjustment unit 8 includes a fixed sleeve 801 fixedly connected to a low-speed motor 704. A rotating arm 802 is fixedly connected to the side wall of the fixed sleeve 801. A sliding groove 803 is carved on the fixed sleeve 801 and extends into the rotating arm 802. A slider 805 is slidably connected inside the rotating arm 802. A magnetic adsorption unit 807 is fixedly connected to the upper end of the slider 805, and the magnetic adsorption unit 807 is magnetically adsorbed to the magnetic sample boat 9. A compression spring 806 is fixedly connected between the slider 805 and the inner wall of the sliding groove 803, and the compression spring 806 is located on the side of the slider 805 away from the fixed sleeve 801.

[0030] The welding sample 6, which needs to be ultrasonically welded, is transferred into the matching magnetic sample boat 9. Then, the magnetic sample boat 9 is placed on the second holding platform 702. The low-speed motor 704 is then started, driving the adjustment unit 8 to rotate. Under the action of centrifugal force, the magnetic adsorption unit 807 will gradually move away from the fixed sleeve 801 along the sliding groove 803. During the entire movement, when the positions of the magnetic adsorption unit 807 and the magnetic sample boat 9 coincide on the vertical plane, the magnetic adsorption unit 807 will be attracted to the magnetic sample boat 9 and drive the magnetic sample boat 9 to move. Then, the low-speed motor 704 stops working, and the compression spring 806, which is in a compressed state, will push the magnetic adsorption unit 807 back to the initial position, thereby driving the magnetic sample boat 9 to move back to the center position at the top of the second holding platform 702, completing the positioning of the magnetic sample boat 9.

[0031] In this embodiment, the fixing unit 2 701 is the same model as the fixing unit 1 501 in the first embodiment, and they can be used interchangeably.

[0032] Compared to the first embodiment, in this embodiment, the magnetic sample boat 9 can be quickly replaced according to the size of the welding sample 6 to accommodate welding samples 6 of different sizes. At the same time, if the magnetic sample boat 9 is excessively worn during use, it can be replaced in time. Compared to the movable mold 503 in the first embodiment, the replacement difficulty and cost can be greatly reduced.

[0033] A safety groove is cut into the upper end of the holding platform 2 702, and the magnetic sample boat 9 is placed in the safety groove, so that the magnetic sample boat 9 is not easy to slide out from the upper end of the holding platform 2 702.

[0034] The safety groove has cross-shaped grooves intersecting the axis of the low-speed motor 704 power output end, which are used to manually fine-tune the position of the magnetic sample boat 9, making the position of the magnetic sample boat 9 more accurate.

[0035] After the low-speed motor 704 starts, its rotational speed gradually increases and then gradually decreases, making the slider 805 move slower along the sliding groove 803, making it easier to be adsorbed and captured by the magnetic sample boat 9.

[0036] A sliding rod 804 is fixedly connected to the inner wall of the sliding groove 803. The sliding rod 804 passes through the slider 805 and the compression spring 806. The sliding rod 804 protects the compression spring 806, making it less likely to fail due to non-working deformation.

[0037] Compared to the first implementation method, this implementation method is suitable for loading when the size of the welding sample 6 needs to be finely adjusted during continuous ultrasonic welding. It can perform rapid loading work. Similarly, the internal structure of welding fixture 2 7 is more complex, and the cost of using welding fixture 2 7 is much higher than that of welding fixture 1 5. The staff can make a reasonable choice according to the actual needs of use.

[0038] The above description is merely a preferred embodiment of the present invention; it encompasses all the protection scope of the present invention. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solutions and improved concepts of the present invention, should be covered within the protection scope of the present invention.

Claims

1. A multi-station ultrasonic welding device, comprising a conveying unit (1), characterized in that: The upper end of the conveying unit (1) is fixedly connected to a frame (2). The frame (2) includes a frame (201). A pair of matching telescopic rods (202) are fixedly connected to the opposite inner sides of the frame (201). A limit key (203) is fixedly connected to one end of each telescopic rod (202) that is close to each other. A pressure sensor (205) is fixedly connected to one end of the limit key (203) that is close to the telescopic rod (202). A compression spring (206) is fixedly connected between the frame (201) and the pressure sensor (205). The compression spring (206) is sleeved on the outside of the telescopic rod (202). Multiple ultrasonic welding units (3) are fixedly connected to the upper inner sidewall of the frame (201). A conveying boat (4) is placed on the upper side of the conveying unit (1). The conveying boat (4) includes a boat body (401). A limiting groove (402) matching the limiting key (203) is carved on the side wall of the boat body (401). The end of the limiting key (203) away from the telescopic rod (202) is provided with a rounded corner. When the conveying boat (4) is conveyed, it first contacts the rounded corner of the limiting key (203). An arc-shaped sliding groove matching the rounded corner is provided in the limiting groove (402). Multiple welding fixtures (5) are placed in the conveying boat (4). Multiple welding samples (6) are stacked in the welding fixtures (5).

2. The multi-station ultrasonic welding device according to claim 1, characterized in that: The welding fixture (5) includes a fixing unit (501), in which a matching holding platform (502) is placed. A pair of matching movable molds (503) are placed on the holding platform (502). A sample slot is provided between the two movable molds (503), and multiple welding samples (6) matching themselves are placed in the sample slot.

3. The multi-station ultrasonic welding device according to claim 1, characterized in that: The end of the limiting key (203) away from the pressure sensor (205) is fixedly connected to a buffer pad (204). The buffer pad (204) is made of elastic and wear-resistant material, and the end of the buffer pad (204) away from the limiting key (203) is frosted.

4. The multi-station ultrasonic welding device according to claim 1, characterized in that: The distance between two adjacent conveyor boats (4) on the conveyor section (1) is more than three times the width of the conveyor boat (4).

5. The multi-station ultrasonic welding device according to claim 1, characterized in that: The conveying boat (4) contains multiple welding fixtures (7), each welding fixture (7) includes a fixing unit (701), a matching holding platform (702) is placed inside the fixing unit (701), a magnetic sample boat (9) is placed on the upper end of the holding platform (702), multiple welding samples (6) are placed inside the magnetic sample boat (9), an adjustment groove (703) is carved inside the holding platform (702), a cover plate (705) is fixedly connected to the opening of the adjustment groove (703), a low-speed motor (704) is fixedly connected to the upper end of the cover plate (705), and an adjustment unit (8) is fixedly connected to the power output end of the low-speed motor (704). The adjustment unit (8) includes a fixed sleeve (801) fixedly connected to a low-speed motor (704). A rotating arm (802) is fixedly connected to the side wall of the fixed sleeve (801). A sliding groove (803) is carved on the fixed sleeve (801). The sliding groove (803) extends into the rotating arm (802). A slider (805) is slidably connected inside the rotating arm (802). A magnetic adsorption unit (807) is fixedly connected to the upper end of the slider (805). The magnetic adsorption unit (807) is magnetically adsorbed with the magnetic sample boat (9). A compression spring (806) is fixedly connected between the slider (805) and the inner wall of the sliding groove (803). The compression spring (806) is located on the side of the slider (805) away from the fixed sleeve (801).

6. The multi-station ultrasonic welding device according to claim 5, characterized in that: The upper end of the second holding platform (702) is carved with a safety groove, and the magnetic sample boat (9) is placed in the safety groove.

7. A multi-station ultrasonic welding device according to claim 6, characterized in that: The safety groove is chiseled with cross-shaped patterns intersecting the axis of the power output end of the low-speed motor (704).

8. A multi-station ultrasonic welding device according to claim 5, characterized in that: A sliding rod (804) is fixedly connected to the inner wall of the sliding groove (803), and the sliding rod (804) passes through the slider (805) and the second compression spring (806).

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