Ultrasonic welding device based on motor drive

Abstract

The application relates to an ultrasonic welding device based on motor driving, which comprises a frame, a welding assembly, a motor, a speed reducer, an eccentric part, a driving wheel, a guide rail, a driving frame and a linkage frame; the guide rail is arranged on the frame along the welding movement direction of the welding assembly, and the driving frame is installed on the guide rail; the eccentric distance of the eccentric part is equivalent to half of the maximum movement stroke of the welding assembly; the motor, the speed reducer, the eccentric part, the driving wheel and the driving frame are sequentially transmissionally connected to drive the driving frame to move along the guide rail; the welding assembly is installed on the linkage frame, and the driving frame is transmissionally connected with the linkage frame to drive the welding assembly to realize reciprocating movement along the welding movement direction through the linkage frame. Since the response speed and the running speed of the motor are far greater than the cylinder driving speed, the welding assembly can be driven to quickly move in the movement stroke, the reciprocating movement time of the welding assembly is greatly saved, and the welding efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of ultrasonic welding technology, and more specifically to an ultrasonic welding device based on motor drive. Background Technology

[0002] The welding components of an ultrasonic welding machine typically include a transducer, an amplitude transformer, and a tool head, which are connected in sequence and commonly referred to as a three-piece assembly. The transducer converts the ultrasonic energy from the ultrasonic generator into vibrational energy, the amplitude transformer amplifies the amplitude, and the tool head transmits the vibrational energy to the workpiece to be welded (such as battery tabs, terminals, and / or wires) to achieve welding.

[0003] In a welding cycle, the tool head needs to reciprocate along its welding direction (from the starting position to the welding position, or from the welding position to the starting position). Traditional implementations primarily use cylinders to drive this motion. Taking an existing ultrasonic welding machine as an example: First, driven by the cylinder, the tool head moves from the starting position to the position where it contacts the workpiece, a process that takes approximately 1.3 seconds. Second, welding begins after the tool head contacts the workpiece, lasting approximately 0.5 seconds (the duration varies depending on the welding process). Third, after welding is complete, the cylinder drives the tool head back to the starting position, a process that takes approximately 1.2 seconds. Therefore, the entire welding cycle of this ultrasonic welding machine takes approximately 3 seconds, resulting in relatively low welding efficiency.

[0004] If product quality is the lifeblood of a company, then improving production efficiency, while ensuring product quality, is the key to competitive advantage in the manufacturing industry. Therefore, the welding industry urgently needs a welding device that can further improve production efficiency, i.e., welding efficiency. Summary of the Invention

[0005] The purpose of this invention is to address the problem of low welding efficiency in traditional ultrasonic welding machines due to the use of cylinder drives, and to disclose an ultrasonic welding device based on motor drive to improve welding efficiency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An ultrasonic welding device driven by a motor includes a frame, welding components, a motor, a reducer, an eccentric component, a drive wheel, a guide rail, a drive frame, and a linkage frame.

[0008] The guide rail is arranged on the frame along the welding movement direction of the welding assembly, and the drive frame is mounted on the guide rail;

[0009] The eccentricity of the eccentric component is equivalent to half of the maximum stroke of the welding assembly;

[0010] The motor, reducer, eccentric component, drive wheel and drive frame are sequentially connected in a transmission manner to drive the drive frame to move along the guide rail;

[0011] The welding assembly is mounted on the linkage frame, and the drive frame is connected to the linkage frame for transmission, so that the welding assembly is driven by the linkage frame to achieve reciprocating motion along the welding motion direction.

[0012] As a preferred embodiment, the drive frame is provided with a drive groove, the length direction of the drive groove is perpendicular to the welding movement direction of the welding assembly, and the length of the drive groove is slightly larger than the diameter of the running trajectory circle of the drive wheel under the transmission of the eccentric component; the width of the drive groove is slightly larger than the outer diameter of the drive wheel, so that the drive wheel is adapted to be installed in the drive groove and rolls in contact with the inner wall of the drive groove.

[0013] As a preferred embodiment, the eccentric component is an eccentric wheel.

[0014] As a preferred embodiment, the linkage frame is also mounted on the guide rail, so that the linkage frame moves along the guide rail under the transmission of the drive frame.

[0015] As a preferred embodiment, the system further includes a buffer assembly connected between the drive frame and the linkage frame, and the buffer assembly is pre-loaded with a buffering pressure that counteracts the transmission force output by the drive frame to the buffer assembly.

[0016] As a preferred embodiment, the buffer assembly is a buffer cylinder, which is preset to an overpressure extension state to generate the buffer pressure.

[0017] As a preferred embodiment, the drive frame includes a drive slider, a drive plate, and a drive seat, which are fixedly connected in sequence; the drive slider is slidably mounted on the guide rail, the drive groove is formed on the drive plate, and the drive seat is connected to one end of the buffer cylinder.

[0018] As a preferred embodiment, the linkage frame includes a linkage slider, a linkage plate, and a linkage seat, which are fixedly connected in sequence; the linkage slider is slidably mounted on the guide rail, and the linkage seat is connected to the other end of the buffer cylinder; the welding assembly is mounted on the linkage seat.

[0019] As a preferred embodiment, the welding assembly includes a transducer, an amplitude transformer, and a tool head, which are connected in sequence. The tool head is mounted on the linkage frame. The maximum stroke refers to the distance the tool head moves from the starting position to the welding position.

[0020] As a preferred embodiment, the motor is a servo motor.

[0021] Therefore, the present invention limits the maximum stroke of the welding assembly by the eccentricity of the eccentric component. At the same time, the eccentric component, drive wheel, guide rail and drive frame can convert the rotational motion of the motor into linear motion, and drive the welding assembly to achieve reciprocating motion in the welding motion direction through the linkage frame. Since the response speed and running speed of the motor are much greater than the cylinder drive speed, the welding assembly can be driven to move quickly within its stroke, which greatly saves the reciprocating motion time of the welding assembly and thus improves the welding efficiency. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a front view schematic diagram of the planar structure of the ultrasonic welding device based on motor drive disclosed in the embodiment.

[0024] Figure 2 This is a right-side view of the planar structure of the motor-driven ultrasonic welding device disclosed in the embodiment.

[0025] Figure 3 Is with Figure 2 A schematic diagram of the planar structure decomposition from the corresponding perspective.

[0026] Figure 4 This is a partial three-dimensional structural schematic diagram of the motor-driven ultrasonic welding device disclosed in the embodiment.

[0027] Figure 5 This is a first exploded structural diagram of the ultrasonic welding device based on motor drive disclosed in the embodiment.

[0028] Figure 6 This is a second exploded structural diagram of the motor-driven ultrasonic welding device disclosed in the embodiment.

[0029] Figure 7 This is a third exploded structural diagram of the motor-driven ultrasonic welding device disclosed in the embodiment.

[0030] Figure 8 This is a fourth exploded structural diagram of the motor-driven ultrasonic welding device disclosed in the embodiment.

[0031] In the diagram: 10-Frame; 20-Welding assembly; 21-Transducer; 22-Amplitude bar; 23-Tool head; 30-Motor; 40-Reducer; 50-Eccentric component; 60-Drive wheel; 70-Guide rail; 80-Drive frame; 81-Drive slider; 82-Drive plate; 83-Drive seat; 84-Drive slot; 90-Linkage frame; 91-Linkage slider; 92-Linkage plate; 93-Linkage seat; 100-Buffer cylinder; 110-Pressure sensor; 120-Magnetic scale; 130-Displacement sensor; 140-Drive wheel upward position sensor; 150-Drive wheel downward position sensor. Detailed Implementation

[0032] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0033] In the description of this application, it should be noted that the terms "upper", "lower", "front", "rear", "side", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0034] Unless otherwise expressly specified and limited, the terms "connection," "fixing," "setting," and "installation" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; it can be a connection within two components. "Installation" can be direct installation or indirect installation through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0035] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature, unless otherwise explicitly specified.

[0036] Please refer to the following: Figures 1 to 8 The ultrasonic welding device based on motor drive disclosed in this embodiment includes a frame 10 and a welding assembly 20 (such as...). Figure 3 The assembly includes a motor 30, a reducer 40, an eccentric component 50, a drive wheel 60, a guide rail 70, a drive frame 80, and a linkage frame 90. In this embodiment, the welding assembly 20 includes a transducer 21, an amplitude transformer 22, and a tool head 23, which are connected in sequence. The motor 30 is preferably a servo motor to achieve precise control. The reducer 40 is used to convert the speed of the motor 30 into the required speed, and a double-support disc planetary reducer can be used.

[0037] The guide rail 70 is arranged on the frame 10 along the welding movement direction of the welding assembly 20, and the drive frame 80 is mounted on the guide rail 70.

[0038] by Figure 1 The orientation shown is used to describe the welding movement direction of the welding assembly 20, which is the direction of the line connecting the highest point (starting position) and the lowest point (welding position) of the tool head 23's movement path during the welding process. Figure 1 The welding movement direction of the welding assembly 20 is the up-down direction. In other embodiments, the welding movement direction may also be the left-right direction or other directions.

[0039] In this embodiment, the eccentricity of the eccentric component 50 is equivalent to half of the maximum travel distance of the welding assembly 20. Due to different process requirements and the unavoidable errors in actual production and manufacturing, "equivalent" in this embodiment means approximately equal or with only a small error.

[0040] In this embodiment, the eccentric component 50 is specifically an eccentric wheel, which has a relatively simple structure. In other embodiments, the eccentric component can also be a multi-link structure or a similar swing arm structure to achieve a similar function to the eccentric wheel.

[0041] The eccentricity of the eccentric component 50 defines the maximum travel distance of the welding assembly 20. In this embodiment, the maximum travel distance is equal to the relative distance the eccentric wheel travels from its highest point to its lowest point, and the eccentricity is equivalent to half of that relative distance.

[0042] Among them, the motor 30, reducer 40, eccentric part 50, drive wheel 60 and drive frame 80 are connected in sequence to drive the drive frame 80 to move along the guide rail 70.

[0043] The welding assembly 20 is mounted on the linkage frame 90, specifically by means of the tool head 23. The drive frame 80 is connected to the linkage frame 90 for transmission, so that the welding assembly 20 is driven to reciprocate along the welding direction through the linkage frame 90.

[0044] Therefore, in this embodiment, the maximum stroke of the welding assembly 20 is limited by the eccentricity of the eccentric component 50. At the same time, the eccentric component 50, the drive wheel 60, the guide rail 70, and the drive frame 80 can convert the rotational motion of the motor 30 into linear motion, and drive the welding assembly 20 to reciprocate in the welding motion direction through the linkage frame 90. Since the response speed and running speed of the motor 30 are much greater than the cylinder drive speed, the welding assembly 20 can be driven to move quickly within its stroke, which greatly saves the time for the welding assembly 20 to move from the starting position to the welding position and from the welding position to the starting position (in order to ensure welding quality, the time for the welding assembly 20 to stay in the welding position to weld the workpiece generally cannot be shortened), thereby improving welding efficiency.

[0045] As a preferred embodiment, the drive frame 80 is provided with a drive groove 84. The length direction of the drive groove 84 is perpendicular to the welding movement direction of the welding assembly 20, and the length of the drive groove 84 is slightly larger than the diameter of the running trajectory circle of the drive wheel 60 under the transmission of the eccentric member 50. The width of the drive groove 84 is slightly larger than the outer diameter of the drive wheel 60, so that the drive wheel 60 is fitted and installed in the drive groove 84 and rolls in contact with the inner wall of the drive groove 84.

[0046] In this embodiment, according to as follows Figure 1 As shown, the welding motion direction of the welding assembly 20 is up and down, so the length direction of the drive groove 84 is left and right, and the width direction of the drive groove 84 is up and down.

[0047] To make the driving process of welding assembly 20 smoother, linkage frame 90 is also mounted on guide rail 70, so that linkage frame 90 moves along guide rail 70 under the transmission of drive frame 80.

[0048] As a preferred embodiment, this embodiment also includes a buffer assembly connected between the drive frame 80 and the linkage frame 90, and the buffer assembly is pre-set with a buffering pressure that opposes the transmission force output by the drive frame 80 to the buffer assembly. In this embodiment, the buffer assembly is specifically a buffer cylinder 100, and the air inlet pipe of the buffer cylinder 100 can be connected only to the tail air inlet, so that the buffer cylinder 100 is pre-set to an overpressure extended state to generate the aforementioned buffering pressure.

[0049] Since the thickness of the workpieces to be welded cannot be completely uniform, the buffer cylinder 100 is set so that the ultrasonic welding device can be used to weld workpieces of different thicknesses. The welding pressure will not change too much due to the change in thickness, thus ensuring the stability of the welding process.

[0050] Specifically, the welding pressure depends on the pressure of the buffer cylinder 100. When the eccentric wheel rotates downward along its running trajectory and moves the tool head 23 to contact the workpiece to be welded, the transmission pressure output by the eccentric wheel is less than the buffer pressure of the buffer cylinder 100. As the eccentric wheel continues to move downward, its transmission pressure increases until its output transmission pressure is equal to that of the buffer cylinder 100. At this point, the buffer cylinder 100 remains fully extended. If the eccentric wheel continues to move downward, its output transmission pressure will be greater than the buffer pressure of the buffer cylinder 100, and the buffer cylinder 100 will be compressed until the transmission pressure output by the eccentric wheel and the pressure output by the buffer cylinder 100 are balanced. Therefore, the buffer cylinder 100 acts as a pressure stabilizing device.

[0051] Please see Figure 6 As a reference implementation, the drive frame 80 includes a drive slider 81, a drive plate 82, and a drive seat 83, which are fixedly connected in sequence. The drive slider 81 is slidably mounted on the guide rail 70, the drive groove 84 is formed on the drive plate 82, and the drive seat 83 is connected to one end of the buffer cylinder 100. Thus, the eccentric wheel drives the drive wheel 60, the drive wheel 60 drives the drive plate 82, the drive plate 82 drives the drive slider 81 and the drive seat 83, and the drive seat 83 applies transmission pressure to the buffer cylinder 100.

[0052] See also Figure 6 As a reference implementation, the linkage frame 90 includes a linkage slider 91, a linkage plate 92, and a linkage seat 93, which are fixedly connected in sequence. The linkage slider 91 is slidably mounted on the guide rail 70, and the linkage seat 93 is connected to the other end of the buffer cylinder 100. The welding assembly 20 is mounted on the linkage seat 93. Therefore, the buffer cylinder 100 transmits the transmission pressure to the linkage seat 93, and the linkage seat 93 transmits the transmission pressure to the linkage plate 92, the linkage slider 91, and the welding assembly 20, thereby realizing the transmission of the welding assembly 20.

[0053] Please see Figure 4 To achieve precise control during the welding process, this embodiment also includes a pressure sensor 110 located directly below the buffer cylinder 100 for precise control of the welding pressure. Additionally, a magnetic scale 120, a displacement sensor 130, a drive wheel upward position sensor 140, and a drive wheel upward position sensor 150 are also provided, allowing the ultrasonic welding device to select different control modes (pressure mode, displacement mode, etc.) as needed.

[0054] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An ultrasonic welding device based on motor drive, characterized in that, It includes the frame, welding components, motor, reducer, eccentric parts, drive wheel, guide rail, drive frame, and linkage frame; The guide rail is arranged on the frame along the welding movement direction of the welding assembly, and the drive frame is mounted on the guide rail; The eccentricity of the eccentric component is equivalent to half of the maximum stroke of the welding assembly; the motor, reducer, eccentric component, drive wheel and drive frame are sequentially connected to drive the drive frame to move along the guide rail; The drive frame includes a drive slider, a drive plate, and a drive base, which are fixedly connected in sequence; the drive slider is slidably mounted on the guide rail. The drive plate has a drive groove, the length direction of which is perpendicular to the welding movement direction of the welding assembly, and the length of the drive groove is greater than the diameter of the running trajectory circle of the drive wheel under the transmission of the eccentric component; the width of the drive groove is greater than the outer diameter of the drive wheel, so that the drive wheel is fitted and installed in the drive groove and rolls in contact with the inner wall of the drive groove. It also includes a buffer assembly, which is connected between the drive frame and the linkage frame, and the buffer assembly is pre-set with a buffer pressure that opposes the transmission force output by the drive frame to the buffer assembly; The welding assembly is mounted on the linkage frame, which is also mounted on the guide rail. The drive frame is connected to the linkage frame, so that the linkage frame moves along the guide rail under the drive of the drive frame, thereby driving the welding assembly to reciprocate along the welding direction through the linkage frame. The welding assembly includes a transducer, an amplitude transformer, and a tool head, which are connected in sequence. The tool head is mounted on the linkage frame. The maximum stroke refers to the distance the tool head moves from the starting position to the welding position.

2. The ultrasonic welding apparatus as described in claim 1, characterized in that, The eccentric component is an eccentric wheel.

3. The ultrasonic welding apparatus as described in claim 1, characterized in that, The buffer assembly is a buffer cylinder, which is preset to an overpressure extension state to generate the buffer pressure.

4. The ultrasonic welding apparatus as described in claim 3, characterized in that, The drive seat is connected to one end of the buffer cylinder.

5. The ultrasonic welding apparatus as described in claim 4, characterized in that, The linkage frame includes a linkage slider, a linkage plate, and a linkage seat, which are fixedly connected in sequence; the linkage slider is slidably mounted on the guide rail, and the linkage seat is connected to the other end of the buffer cylinder.

6. The ultrasonic welding apparatus as described in claim 1, characterized in that, The motor is a servo motor.

Images