An ultrasonic welding machine

Abstract

The present invention discloses an ultrasonic welding machine, which includes a lifting fixed frame, a servo motor arranged above the fixed frame, the servo motor cooperates with one end of a screw, and the other end of the screw can be connected to an upper mold, a variable amplitude rod is arranged below the fixed frame, a transducer is arranged at the upper end of the variable amplitude rod, a first through hole for inserting the screw is arranged in the middle of the variable amplitude rod and the transducer, and the upper mold is located below the variable amplitude rod. The welding machine can effectively ensure the yield rate of welding.

Description

Technical Field

[0001] The invention relates to an ultrasonic welding machine. Background Art

[0002] Existing ultrasonic welding machines have the following shortcomings: 1. Existing ultrasonic welding machines typically use pneumatic cylinders as their power source, which are susceptible to air pressure fluctuations, leading to poor welds. 2. The travel distance of pneumatic cylinder-type ultrasonic welding machines cannot be precisely controlled. 3. Existing ultrasonic upper molds cannot be positioned correctly, resulting in different positions and angles each time the upper mold is installed. 4. The upper mold is prone to loosening during operation. 5. The lower mold cannot be quickly positioned. 6. Pneumatic ultrasonic welding machines cannot output multiple pressure levels during the welding process. Summary of the Invention

[0003] In order to solve the above technical problems, an object of the present invention is to provide an ultrasonic welding machine.

[0004] The present invention is achieved through the following technical solutions:

[0005] An ultrasonic welding machine includes a lifting and lowering fixed frame, a servo motor is arranged above the fixed frame, the servo motor is cooperatively connected to one end of a screw, and the other end of the screw can be connected to an upper mold, a variable amplitude rod is arranged below the fixed frame, a transducer is arranged at the upper end of the variable amplitude rod, a first through hole for inserting the screw is arranged in the middle of the variable amplitude rod and the transducer, and the upper mold is located below the variable amplitude rod.

[0006] In an embodiment of the present invention, at least one piezoelectric ceramic is further arranged above the transducer, a pressure block is arranged above the piezoelectric ceramic, a second through hole for screw insertion is provided in the middle of the piezoelectric ceramic and the pressure block, the first through hole is cooperatively connected with the second through hole, a copper sheet is provided between the piezoelectric ceramic and the transducer, and a copper sheet is provided between the piezoelectric ceramic and the pressure block.

[0007] In the embodiment of the present invention, at least two stacked piezoelectric ceramics are provided between the transducer and the pressure block, and a copper sheet is provided between adjacent piezoelectric ceramics.

[0008] In an embodiment of the present invention, the piezoelectric ceramic, the pressure block and the upper part of the transducer are connected by a first hollow bolt, and the first hollow bolt is located in the first through hole and the second through hole; the lower part of the transducer is connected to the amplitude rod by a second hollow bolt, and the second hollow bolt is located in the second through hole.

[0009] In an embodiment of the present invention, the servo motor is connected to one end of the screw via a coupling, a hollow cylinder is provided below the coupling, a first slot is provided on the side wall of the cylinder, one end of the screw can be inserted into the cylinder, a second slot is provided at one end of the screw, the first slot and the second slot are connected via a pin shaft, a spring is also provided in the cylinder, one end of the spring is coupled to the connector, and the other end of the spring is coupled to one end of the screw.

[0010] In an embodiment of the present invention, a connecting plate is provided below the fixing frame, and a through-hole for placing the amplitude changing rod is provided on the connecting plate. A top-down groove is provided on the connecting plate at the through-hole, and a nylon washer is provided at the bottom of the groove. A flange is provided on the outer periphery of the amplitude changing rod, and the flange is located above the nylon washer. A nylon block is also provided above the flange, and a clamping block is provided above the nylon block. The clamping block is connected to the connecting plate via a locking bolt.

[0011] In an embodiment of the present invention, a base is further included, a column is arranged above the base, a transmission motor is arranged on the column, the transmission motor is connected to a screw rod, a nut seat is matched with the screw rod, and the nut seat is matched with the fixing frame to realize the movement of the fixing frame.

[0012] In an embodiment of the present invention, a slot for placing the lower mold is provided above the base, and an electromagnetic suction cup for fixing the lower mold is provided around the slot.

[0013] In an embodiment of the present invention, a dust cover is further provided above the base, the column and the servo motor are located in the dust cover, and a fan is further provided above the dust cover.

[0014] In the embodiment of the present invention, an encoder is further provided on the column.

[0015] The ultrasonic welding machine of the present invention has the following beneficial effects: 1. It effectively solves the problem of welding positioning accuracy and ensures consistent welding; 2. It realizes the alignment and automatic locking of the upper mold; 3. It can quickly replace the lower mold; 4. It can output multiple pressures and speeds according to the welding process of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 It is a perspective view of the present invention.

[0018] Figure 2 It is a schematic diagram of the base in the present invention.

[0019] Figure 3 It is a schematic diagram of the dust cover in the present invention.

[0020] Figure 4 This is a schematic diagram of the coordination of the columns in the present invention. Figure 1 .

[0021] Figure 5 This is a schematic diagram of the coordination of the columns in the present invention. Figure 2 .

[0022] Figure 6 This is a schematic diagram of the coordination of the columns in the present invention. Figure 3 .

[0023] Figure 7 yes Figure 6 Enlarged schematic diagram of point A in the middle.

[0024] Figure 8 This is a schematic diagram of the horn in the present invention. Figure 1 .

[0025] Figure 9 This is a schematic diagram of the horn in the present invention. Figure 2 .

[0026] Figure 10 This is a schematic diagram of the horn in the present invention. Figure 3 .

[0027] Figure 11 It is a schematic diagram of the screw rod in the present invention. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0029] References herein to "one embodiment" or "embodiment" refer to specific features, structures, or characteristics that may be included in at least one implementation of the present invention. In describing the present invention, it should be understood that the terms "upper," "lower," "top," "bottom," and the like, which indicate orientations or positional relationships based on those shown in the accompanying drawings, are intended solely for ease of description and simplification of the present invention and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not intended to indicate or imply relative importance or to implicitly specify the number of the technical features referred to. Thus, a feature designated "first" or "second" may explicitly or implicitly include one or more of the features. Furthermore, the terms "first," "second," and the like are used to distinguish similar objects and are not necessarily intended to describe a specific order or sequential sequence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than that illustrated or described herein.

[0030] Referring to the drawings in the specification, an ultrasonic welding machine includes a fixed frame 10 that can be raised and lowered, a servo motor 11 is arranged above the fixed frame, the servo motor is cooperated with one end of a screw 12, and the other end of the screw can be connected to an upper mold 100, a variable amplitude rod 13 is arranged below the fixed frame, a transducer 14 is arranged at the upper end of the variable amplitude rod, a first through hole 15 for inserting the screw is provided in the middle of the variable amplitude rod and the transducer, and the upper mold is located below the variable amplitude rod.

[0031] Furthermore, at least one piezoelectric ceramic 16 is provided above the transducer, a pressure block 17 is provided above the piezoelectric ceramic, a second through hole 18 for inserting a screw is provided in the middle of the piezoelectric ceramic and the pressure block, the first through hole is cooperatively connected with the second through hole, a copper sheet 19 is provided between the piezoelectric ceramic and the transducer, and a copper sheet 19 is provided between the piezoelectric ceramic and the pressure block. In the present invention, one end of the screw is connected to the servo motor, and then the other end of the screw passes through the second through hole and the first through hole and extends from the lower end of the amplitude rod to be connected to the upper mold.

[0032] Preferably, at least two stacked piezoelectric ceramics are provided between the transducer and the pressure block, and a copper sheet 19 is provided between adjacent piezoelectric ceramics. Figure 8 and Figure 10 , 4 piezoelectric ceramics are drawn in the figure, each two piezoelectric ceramics form a group, a copper sheet is set between the two groups, and there are three copper sheets in total.

[0033] Furthermore, the piezoelectric ceramic, the pressure block and the upper part of the transducer are connected by a first hollow bolt 21, and the first hollow bolt is located in the first through hole and the second through hole; the lower part of the transducer is connected to the amplitude rod by a second hollow bolt 22, and the second hollow bolt is located in the second through hole, so that the pressure block, the piezoelectric ceramic, the transducer and the amplitude rod are coaxially arranged. Preferably, a hollow nut 20 can be provided above the pressure block, and the nut is connected with the first hollow bolt. For details, please refer to the drawings in the specification. Figure 10 .

[0034] In a preferred embodiment of the present invention, the servo motor is connected to one end of the screw via a coupling 23. A hollow cylinder 24 is provided below the coupling. The side wall of the cylinder is provided with a first slot 25. One end of the screw can be inserted into the cylinder. One end of the screw is provided with a second slot 26. The first slot and the second slot are connected via a pin 27. Figure 11 The pin can move in the first slot and the second slot. A spring 28 is also provided in the cylinder. One end of the spring is connected to the connector, and the other end of the spring is connected to one end of the screw.

[0035] Furthermore, a connecting plate 29 is provided below the fixing frame, and a through hole 30 for placing the horn is provided on the connecting plate, and a sink 31 from top to bottom is provided at the through hole of the connecting plate, as shown in the accompanying drawings of the specification. Figure 7 A nylon washer 32 is provided at the bottom of the sink, a flange 33 is provided on the periphery of the amplitude transformer, the flange is located above the nylon washer, a nylon block 34 is also provided above the flange, a clamping block 35 is provided above the nylon block, and the clamping block is connected to the connecting plate via a locking bolt 36.

[0036] Preferably, the machine further comprises a base 36, a column 37 is provided above the base, a transmission motor 38 is provided on the column, the transmission motor is connected to a screw 39, a nut seat 40 is provided on the screw, and the nut seat is coupled to the fixed frame to achieve movement of the fixed frame. A slot 41 for placing the lower mold 200 is provided above the base, and an electromagnetic suction cup 42 for fixing the lower mold is provided around the slot. A dust cover 43 is also provided above the base, and the column and servo motor are located inside the dust cover. A fan 44 is also provided above the dust cover. An encoder 45 is also provided on the column.

[0037] In the present invention:

[0038] 1. The servo motion mechanism uses a servo motor drive module, with an encoder mounted on the column above the lead screw. When the PLC sends pulses to the servo motor, the servo motor rotates, driving the encoder in turn. The encoder then transmits a pulse signal to the PLC. Through programming, the encoder pulse count is compared with the pulse count generated by the PLC itself, and the difference is automatically compensated for, achieving precise positioning. The servo motor can output multiple speeds and pressures according to the product's welding process, improving welding quality.

[0039] 2. The upper die's automatic locking mechanism features a hollow design for the transducer and horn. In one embodiment, a 17mm through-hole is drilled between the transducer and horn. A long screw connects them, one end of which is connected to the servo motor and the other to the upper die. During upper die installation, the horn and upper die are positioned using a slot, and the servo motor automatically locks them. The motor stops when the set torque value is reached.

[0040] 3. The quick lower die positioning mechanism features a precision positioning slot on the base. After inserting the lower die into the slot, the electromagnetic chuck is engaged to secure the die to the base. This secures the die securely in place without the need for screws. When the die needs to be replaced, the electromagnetic chuck is disconnected for quick replacement.

[0041] The welding machine of the present invention can improve production efficiency by 10%, reduce mold change time by 1 hour / time, and effectively improve the yield rate by 10%.

[0042] The foregoing description shows and describes preferred embodiments of the present invention. As previously mentioned, it should be understood that the present invention is not limited to the form disclosed herein and should not be construed as excluding other embodiments. Instead, the present invention can be used in various other combinations, modifications, and environments and can be modified within the scope of the inventive concept described herein by the teachings above or by techniques or knowledge in the relevant art. Modifications and variations made by those skilled in the art without departing from the spirit and scope of the present invention are intended to be within the scope of the appended claims.

Claims

1. An ultrasonic welding machine, comprising a lifting and lowering fixed frame, characterized in that: A servo motor is provided above the fixing frame, the servo motor is coupled to one end of a screw, the other end of the screw can be coupled to an upper die, a horn is provided below the fixing frame, a transducer is provided at the upper end of the horn, a first through hole for inserting the screw is provided in the middle of the horn and the transducer, and the upper die is located below the horn; The servo motor is connected to one end of the screw via a coupling, a hollow cylinder is provided below the coupling, a first slot is provided on the side wall of the cylinder, one end of the screw can be inserted into the cylinder, a second slot is provided on one end of the screw, the first slot and the second slot are connected via a pin, a spring is further provided in the cylinder, one end of the spring is coupled to the connector, and the other end of the spring is coupled to one end of the screw; A connecting plate is provided below the fixing frame, and a through-hole for placing the amplitude transformer is provided on the connecting plate, and a sinking groove is provided from top to bottom at the through-hole of the connecting plate, and a nylon washer is provided at the bottom of the sinking groove. A flange is provided on the periphery of the amplitude transformer, and the flange is located above the nylon washer. A nylon block is further provided above the flange, and a pressing block is provided above the nylon block. The pressing block is coupled to the connecting plate via a locking bolt. At least one piezoelectric ceramic is further provided above the transducer, a pressure block is provided above the piezoelectric ceramic, a second through hole for inserting a screw is provided in the middle of the piezoelectric ceramic and the pressure block, the first through hole is cooperatively connected with the second through hole, a copper sheet is provided between the piezoelectric ceramic and the transducer, and a copper sheet is provided between the piezoelectric ceramic and the pressure block; Four stacked piezoelectric ceramics are arranged between the transducer and the pressing block, and copper sheets are arranged between adjacent piezoelectric ceramics.

2. The ultrasonic welding machine according to claim 1, characterized in that: The piezoelectric ceramic, the pressure block and the upper part of the transducer are connected by a first hollow bolt, and the first hollow bolt is located in the first through hole and the second through hole; the lower part of the transducer is connected to the amplitude rod by a second hollow bolt, and the second hollow bolt is located in the second through hole.

3. The ultrasonic welding machine according to claim 1, characterized in that: It also includes a base, a column is arranged above the base, a transmission motor is arranged on the column, the transmission motor is connected to a screw rod, a nut seat is matched with the screw rod, and the nut seat is matched with the fixing frame to realize the movement of the fixing frame.

4. The ultrasonic welding machine according to claim 3, characterized in that: A slot for placing the lower die is provided above the base, and an electromagnetic chuck for fixing the lower die is provided around the slot.

5. The ultrasonic welding machine according to claim 4, characterized in that: A dust cover is further provided above the base, the column and the servo motor are located in the dust cover, and a fan is further provided above the dust cover.

6. The ultrasonic welding machine according to claim 5, characterized in that: An encoder is also provided on the column.

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