CN210498782U - Ultrasonic welding machine - Google Patents

Abstract

The utility model discloses an ultrasonic welding machine, it includes welding machine body and positioning die, positioning die includes the mount pad, fixed locating part, activity locating part and auxiliary positioning spare, fixed locating part is installed in the mount pad, activity locating part and fixed locating part swing joint, activity locating part encloses with fixed locating part and constitutes an installation space, installation space is used for acceping treat welded first work piece and treat welded first work piece location, auxiliary positioning spare sets up between soldered joint and fixed locating part, the one end of auxiliary positioning spare is installed in the support arm, the one end that the support arm was kept away from to auxiliary positioning spare is spacing with treat welded second work piece looks butt and treat welded second work piece. According to the ultrasonic welding machine, the first workpiece to be welded is positioned together through the fixed limiting part and the movable limiting part, the second workpiece to be welded is positioned through the auxiliary positioning part, the parts to be welded of the two workpieces are aligned, the machining error and the reject ratio of a product are reduced, and the product quality is guaranteed.

Description

Ultrasonic welding machine

Technical Field

The utility model relates to a filter processing equipment technical field especially relates to an ultrasonic welding machine.

Background

The filter is used for filtering automobile engine oil, fuel oil, air in a compression system and impurities in an air conditioning system so as to reduce the damage of the impurities to an automobile engine system and the compression system and ensure safe and efficient driving of an automobile. In the production process of filter, need carry out assembled joint to each part often to make each part of filter combine closely together, at present, mainly utilize the higher ultrasonic welding machine of welding efficiency to weld the spare part of filter, with the stability that improves the filter structure, and then the effective use of guarantee filter. An ultrasonic welding machine is a high-efficiency welding device, which generates high-voltage and high-frequency signals of 20KHz or 15KHz by an ultrasonic generator, converts the signals into high-frequency mechanical vibration by an energy conversion system, so that molecules or atoms on workpieces move rapidly and rub against each other in the rapid movement process of the molecules or atoms, thus the temperature of two or more workpieces to be welded is gradually increased, when the temperature of the workpieces reaches the melting point of the workpieces, the joints of the workpieces are rapidly melted, the melted workpiece materials are filled in gaps among the joints of the workpieces, and when the ultrasonic generator is stopped, the workpieces stop vibrating and are gradually cooled and formed, thereby realizing the welding operation of two or more workpieces.

However, when the traditional ultrasonic welding machine is used for welding the filter, the filter is not easy to position, and the filter is easy to deviate when vibrating under the action of the ultrasonic generator, so that the distance between interfaces of each component of the filter is not easy to fix, the size error of the machined filter is larger, and the reject ratio of a product is higher.

SUMMERY OF THE UTILITY MODEL

Accordingly, it is necessary to provide an ultrasonic welding machine for solving the technical problem of high product defect rate.

The utility model provides an ultrasonic welding machine, this ultrasonic welding machine includes welding machine body and positioning die, positioning die sets up in the welding machine body, the welding machine body includes the operation panel, the support arm, height adjustment mechanism, supersonic generator, the transducer, amplitude transformer and soldered connection, the operation panel is connected with the one end of support arm, the operation panel is used for accepting the first work piece of treating welding and treats the second work piece of welding, height adjustment mechanism keeps away from the operation panel and is connected with the other end of support arm, supersonic generator installs in height adjustment mechanism's output, the input of transducer is connected with supersonic generator's output, the output of transducer is connected with amplitude transformer input, the soldered connection is connected with the output of amplitude transformer and corresponds the operation panel, the soldered connection is used for driving treats the first work piece of welding and treats the second work piece vibration friction of welding. The positioning die is used for positioning a first workpiece to be welded and a second workpiece to be welded, and comprises a mounting seat, a fixed limiting part, a movable limiting part and an auxiliary positioning part, wherein the mounting seat is arranged on an operating platform, the fixed limiting part is mounted on the mounting seat, the movable limiting part is connected with the fixed limiting part in a swinging mode, the movable limiting part and the fixed limiting part surround to form a mounting space, the mounting space is used for accommodating the first workpiece to be welded and positioning the first workpiece to be welded, the auxiliary positioning part is arranged between a welding head and the fixed limiting part, one end of the auxiliary positioning part is mounted on the supporting arm, and one end, away from the supporting arm, of the auxiliary positioning part abuts against the second workpiece to be welded and is limited to.

In one embodiment, the positioning mold further includes a positioning pin, a groove and a first insertion hole are formed on one side of the fixed limiting member, the groove is communicated with the first insertion hole, a first protrusion is disposed on one side of the movable limiting member adjacent to the fixed limiting member, a second insertion hole is formed on the first protrusion, the first protrusion is embedded in the groove, and the positioning pin sequentially penetrates through the first insertion hole and the second insertion hole and is connected with the mounting base.

In one embodiment, a recess is formed in a side of the fixed limiting member away from the groove, a second protrusion is disposed on a side of the movable limiting member away from the first protrusion, and the second protrusion is inserted into the recess and abuts against an inner surface of the recess.

In one embodiment, a fastening block is disposed on a surface of the second protrusion facing away from the mounting space, and a clamping member is disposed on a side of the fixed limiting member adjacent to the second protrusion, the clamping member being clamped in the fastening block and connected to the movable limiting member.

In one embodiment, the buckle block is provided with an inclined groove, an opening of the inclined groove faces back to the clamping piece, and an included angle between a tangent line at the joint of the buckle block and the movable limiting piece and the inclined groove is between 30 degrees and 60 degrees.

In one embodiment, the clamping member comprises a fixed block and a clamping ring, the fixed block is connected with the fixed limiting member, and the clamping ring is rotatably connected with the fixed block and clamped with the buckling block.

In one embodiment, the ultrasonic welding machine further comprises a stirring piece which is far away from the positioning pin and is connected with the movable limiting piece.

In one embodiment, the end of the toggle piece is provided with a control ball.

In one embodiment, a semi-circular arc groove is formed in one end, far away from the supporting arm, of the auxiliary positioning piece, and the semi-circular arc groove is used for being abutted to a second workpiece to be welded.

In one embodiment, the distance between the auxiliary positioning element and the fixed limiting element is between 5 mm and 20 mm.

Above-mentioned ultrasonic welding machine, set for the position mould at welding machine body facial make-up, place in installation space through treating the first work piece of welding, and swing activity locating part, make the both ends of activity locating part respectively with the both ends butt of fixed locating part, treat that the first work piece of welding restricts in fixed mould under the common restraint of fixed locating part and activity locating part, treat that welded second work piece is difficult for sliding under the restraint of auxiliary positioning spare, thus, treat that welded first work piece and treat that the welding position of treating of welded second work piece is aimed at, in order to do benefit to the welding head and weld two work pieces, thereby reduce the machining error and the defective rate of product, product quality has been guaranteed.

Drawings

FIG. 1 is a schematic view of a state of an ultrasonic welding machine in one embodiment;

FIG. 2 is a schematic view of the ultrasonic welding machine in another state according to an embodiment;

FIG. 3 is an enlarged partial schematic view of the ultrasonic welding machine of the embodiment shown in FIG. 2;

FIG. 4 is a schematic structural view of a positioning die in one embodiment;

fig. 5 is a partially enlarged structural schematic view of the positioning mold in the embodiment shown in fig. 4.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

Referring to fig. 1 and 2 together, the present invention provides an ultrasonic welding machine 10, the ultrasonic welding machine 10 includes a welding machine body 100 and a positioning mold 200, the positioning mold 200 is disposed on the welding machine body 100, the welding machine body 100 includes an operation table 110, a support arm 120, a height adjusting mechanism 130, an ultrasonic generator 140, a transducer 150, an amplitude transformer 160 and a welding head 170, the operation table 110 is connected to one end of the support arm 120, the operation table 110 is used for receiving a first workpiece 20 to be welded and a second workpiece 30 to be welded, the height adjusting mechanism 130 is far away from the operation table 110 and is connected to the other end of the support arm 120, the ultrasonic generator 140 is mounted to an output end of the height adjusting mechanism 130, an input end of the transducer 150 is connected to an output end of the ultrasonic generator 140, an output end of the transducer 150 is connected to an input end of the amplitude transformer 160, the welding head 170 is connected to an output end of the amplitude transformer 160 and corresponds, the welding head 170 is configured to drive the first workpiece 20 to be welded and the second workpiece 30 to be welded to generate high-frequency vibration, i.e., high-frequency vibration, so that the vibrating first workpiece 20 to be welded and the vibrating second workpiece 30 to be welded rub against each other, and further generate heat to increase temperature, so as to facilitate heating and melting of the to-be-welded portion of the first workpiece 20 to be welded and the to-be-welded portion of the second workpiece 30 to be welded, and further bond the to-be-welded portion and the to-be-welded portion together. The positioning mold 200 is used for positioning a first workpiece 20 to be welded and a second workpiece 30 to be welded, the positioning mold 200 includes a mounting base 210, a fixed limiting member 220, a movable limiting member 230 and an auxiliary positioning member 240, the mounting base 210 is disposed on the operating platform 110, the fixed limiting member 220 is mounted on the mounting base 210, the movable limiting member 230 is connected to the fixed limiting member 220 in a swinging manner, the movable limiting member 230 and the fixed limiting member 220 surround to form a mounting space 250, the mounting space 250 is used for accommodating the first workpiece 20 to be welded and positioning the first workpiece 20 to be welded, the auxiliary positioning member 240 is disposed between the welding head 170 and the fixed limiting member 220, one end of the auxiliary positioning member 240 is mounted on the supporting arm 120, and one end of the auxiliary positioning member 240, which is far away from the supporting arm 120, abuts against the second workpiece 30 to be welded and limits the second workpiece.

In the ultrasonic welding machine 10, the positioning mold 200 is installed on the welding machine body 100, the first workpiece 20 to be welded is placed in the installation space 250, and the movable limiting member 230 is shifted, so that two ends of the movable limiting member 230 are respectively abutted to two ends of the fixed limiting member 220, the first workpiece 20 to be welded is limited in the positioning mold 200 under the common constraint of the fixed limiting member 220 and the movable limiting member 230, and the second workpiece 30 to be welded is not easy to slide under the constraint of the auxiliary positioning member 240, so that the to-be-welded part of the first workpiece 20 to be welded is aligned with the to-be-welded part of the second workpiece 30 to be welded, and the welding head 170 is favorable for welding the two workpieces, thereby reducing the machining error and the reject ratio of the product and ensuring the product quality.

The working principle of the ultrasonic welding machine is as follows: the movable limiting member 230 is shifted to make the free end of the movable limiting member 230 gradually away from the fixed limiting member 220, which can also be understood as that the movable limiting member 230 swings relative to the fixed limiting member 220, the first workpiece 20 to be welded is placed in the installation space 250, then the movable limiting member 230 is shifted reversely to make the free end of the movable limiting member 230 gradually approach the fixed limiting member 220 until the free end of the movable limiting member 230 abuts against the fixed limiting member 220, so that the first workpiece 20 to be welded is limited in the installation space 250 under the common constraint of the fixed limiting member 220 and the movable limiting member 230, and the positioning of the first workpiece 20 to be welded is realized. And then, the second workpiece 30 to be welded is placed between the first workpiece 20 to be welded and the welding head 170, so that the part to be welded of the second workpiece 30 to be welded is abutted against the part to be welded of the first workpiece 20 to be welded, and the second workpiece 30 to be welded is abutted against the auxiliary positioning member 240, so that the second workpiece 30 to be welded is not easy to slide to the side under the constraint of the auxiliary positioning member 240, and the positioning of the second workpiece 30 to be welded is realized. The height adjusting mechanism 130, the ultrasonic generator 140 and the transducer 150 are respectively connected with an external power supply, the height adjusting mechanism 130 drives the ultrasonic generator 140, the transducer 150, the amplitude transformer 160 and the welding head 170 to approach the second workpiece 30 to be welded until the welding head 170 abuts against the second workpiece 30 to be welded, meanwhile, the ultrasonic generator 140 generates high-pressure and high-frequency signals, the high-frequency signals are converted into high-frequency vibration through the transducer 150 and the amplitude transformer 160 and transmitted to the welding head 170, thus, the welding head 170 transmits the high-frequency vibration to the second workpiece 30 to be welded and further transmits the high-frequency vibration to the first workpiece 20 to be welded, so that the part to be welded of the first workpiece 20 to be welded and the part to be welded of the second workpiece 30 to be welded generate friction, the temperature is raised and melted to generate glue, and the glue is filled between the first workpiece 20 to be welded and the second workpiece 30 to be welded, thereby adhering the first workpiece 20 to be welded and the second workpiece 30 to be welded, and realizing the welding of the product.

The welding machine body 100 is used for driving the first workpiece 20 to be welded and the second workpiece 30 to be welded to synchronously vibrate, so that mutual friction is generated between the two workpieces to be welded, the temperature is raised and the workpieces are melted, and thus, a molten workpiece glue solution is filled between a gap at the interface of the two workpieces to be welded, and gluing and bonding of the two workpieces are realized. The operation table 110 is used for receiving the positioning die 200, the first workpiece 20 to be welded and the second workpiece 30 to be welded so as to position the two workpieces to be welded, and the operation table 110 is also used for installing the supporting arm 120 and providing support for the arrangement of the ultrasonic generator 140, the transducer 150, the horn 160 and the welding head 170. In an embodiment, at least four pad feet 111 are symmetrically arranged on the bottom surface of the operating platform 110, a suction cup 112 is arranged at the end of each pad foot 111, and the suction cups 112 are used for being adsorbed and bonded with an external workbench, it can be understood that the suction cups 112 are tightly attached to the surface of the external workbench under the action of atmospheric pressure, when the welding machine body 100 is vibrated by external force, the operating platform 110 is always firmly connected with the external workbench under the action of the suction cups 112, the welding machine body 100 is not easy to move, and therefore the installation stability of the ultrasonic welding machine is improved, and the normal operation of the filter welding operation is ensured.

The support arm 120 is used to support and raise the height of the sonotrode 140, the transducer 150, the horn 160, and the weld head 170 to facilitate the vertical machining operation of the weld head 170 on the workpiece to be welded. In one embodiment, the console 110 and the support arm 120 are integrally formed, that is, the console 110 and the support arm 120 form a firmly combined whole, so that the stability of the connection between the console 110 and the support arm 120 is improved, and safety accidents caused by the toppling of the welding machine body 100 during the operation of the ultrasonic welding machine are prevented. The height adjusting mechanism 130 is used for moving under the condition of switching on an external power supply, so as to drive the ultrasonic generator 140, the transducer 150, the horn 160 and the welding head 170 to move synchronously, so that the welding head 170 is close to or away from the first workpiece 20 to be welded and the second workpiece 30 to be welded periodically, and thus the welding of the workpieces is realized.

The ultrasonic generator 140 is electrically connected to an external power source, and generates a high-voltage and high-frequency signal to provide energy for the movement of the welding head 170 when the external power source is connected. The transducer 150 is configured to receive the high-voltage and high-frequency signals generated by the ultrasonic generator 140, and convert the high-voltage and high-frequency signals into high-frequency mechanical vibration to drive the welding head 170 to perform high-frequency mechanical vibration. The horn 160 is used to change the amplitude of the transducer 150 to adjust the ratio of the vibration speed of the transducer 150 to the welding head 170, so that the load matching between different types of welding heads 170 and the transducer 150 can be realized to reduce the resonant impedance between the transducer 150 and different types of welding heads 170, and further reduce the heat generation of the transducer 150 to prolong the service life of the transducer 150. The welding head 170 is driven by the amplitude transformer 160 to vibrate at a high frequency, and is close to the workpieces to be welded under the action of the height adjusting mechanism 130 until the welding head 170 abuts against the workpieces to be welded, under the condition, the welding head 170 transmits the high-frequency vibration to the first workpiece 20 to be welded and the second workpiece 30 to be welded, so that the two workpieces to be welded vibrate at a high frequency and generate relative friction, thus the temperature of the parts to be welded of the two workpieces which rub against each other is increased, and glue generated by melting the workpieces by heating is rapidly filled in the gaps between the two workpieces, so that the two workpieces are connected together.

The positioning die 200 is used for positioning the first workpiece 20 to be welded and the second workpiece 30 to be welded, so as to prevent the occurrence of a dislocation problem at the joint of the two workpieces caused by the deviation of the workpieces to be welded, thereby ensuring the welding quality of the workpieces. It should be noted that, in this embodiment, the positioning operation of two workpieces to be welded is exemplified, and in the actual production process, three or more workpieces may be stacked on the positioning mold 200 and welded synchronously according to the thickness of the workpieces to be machined, so as to improve the welding efficiency of the workpieces, which is not described herein again.

The fixed limiting member 220 and the movable limiting member 230 are used together to position the first workpiece 20 to be welded, so as to prevent the first workpiece 20 to be welded from shifting on the mounting base 210. In an embodiment, the mounting base 210 is provided with a slot, and the bottom of the fixed limiting member 220 is provided with a fixture block, which is inserted into the slot and abuts against the inner surface of the slot. The clamping grooves are respectively formed in the mounting seat 210, and the clamping block is arranged at the bottom of the fixed limiting part 220, so that the clamping block is only required to be inserted into the clamping groove, that is, the fixed limiting part 220 is connected with the mounting seat 210, the installation operation of the fixed limiting part 220 is simplified, and the assembly efficiency of the positioning die 200 is improved.

Referring to fig. 3, in an embodiment, the positioning mold 200 further includes a positioning pin 250, a groove 221 and a first insertion hole 222 are formed on one side of the fixed limiting member 220, the groove 221 is communicated with the first insertion hole 222, a first bump 231 is disposed on one side of the movable limiting member 230 adjacent to the fixed limiting member 220, a second insertion hole 232 is formed on the first bump 231, the first bump 231 is embedded in the groove 221, and the positioning pin 250 sequentially penetrates through the second insertion hole 232 and the first insertion hole 222 and is connected to the mounting base 210. By arranging the positioning pin 250 and sequentially penetrating the positioning pin 250 through the second insertion hole 232 and the first insertion hole 222, the movable limiting member 230 can rotate relative to the positioning pin 250 and swing relative to the fixed limiting member 220 with the positioning pin 250 as a center, so that by shifting the movable limiting member 230, the movable limiting member 230 is far away from or close to the fixed limiting member 220, the size of the installation space 250 can be changed, and the first workpiece 20 to be welded can be accommodated in the installation space 250.

In an embodiment, a notch 223 is formed on a side of the fixed limiting member 220 away from the groove 221, a second protrusion 233 is disposed on a side of the movable limiting member 230 away from the first protrusion 231, a shape and structure of the second protrusion 233 are matched with a shape and structure of the notch 223, the second protrusion 233 is inserted into the notch 223 and abuts against an inner surface of the notch 223, and preferably, a height of the second protrusion 233 is equal to a depth of the notch 223. In this way, when the second protruding block 233 is inserted into the notch 223, two side surfaces of the movable limiting member 230 can be respectively completely attached to the fixed limiting member 220, that is, when two side surfaces of the movable limiting member 230 are respectively abutted to the fixed limiting member 220, the size of the installation space 250 is kept constant, so as to facilitate the limiting and shaping of the first workpiece 20 to be welded with variable volume, such as a filter paper roll, so that the area of the part to be welded of the first workpiece 20 to be welded is kept unchanged, thereby improving the welding quality of the workpiece.

Referring to fig. 4 and fig. 5, in an embodiment, a fastening block 234 is disposed on the second bump 233 opposite to the mounting space 250, a clamping member 224 is disposed on a side of the fixed limiting member 220 adjacent to the second bump 233, and the clamping member 224 is clamped with the fastening block 234, for example, the clamping member 224 is clamped in the fastening block 234, so that the fixed limiting member 220 and the movable limiting member 230 are connected more stably and firmly. That is to say, by fastening the fastening member 224 and the fastening block 234, the side of the fixed limiting member 220 away from the positioning pin 250 and the side of the movable limiting member 230 away from the positioning pin 250 are firmly connected together, so as to prevent the first workpiece 20 to be welded from being pressed by the welding head 170 to push the movable limiting member 230, so that the movable limiting member 230 is away from the fixed limiting member 220, and the first workpiece 20 to be welded is positioned and failed. Further, the clamping member 224 includes a fixing block 224a and a clamping ring 224b, the fixing block 224a is connected to the fixed limiting member 220, and the clamping ring 224b is rotatably connected to the fixing block 224a and clamped to the fastening block 234, so that by pulling the clamping ring 224b, the clamping ring 224b can be fastened to the fastening block 234 or the clamping ring 224b can be pulled out from the fastening block 234, thereby realizing the connection or separation of the movable limiting member 230 and the fixed limiting member 220.

In one embodiment, the fastening block 234 defines an inclined groove 234a, an opening of the inclined groove 234a faces away from the fastening member 224, an included angle between a tangent line of a connection portion of the fastening block 234 and the movable limiting member 230 and the inclined groove 234a is between 30 degrees and 60 degrees, and preferably, an included angle between a tangent line of a connection portion of the fastening block 234 and the movable limiting member 230 and the inclined groove 234a is 45 degrees. By forming the inclined groove 234a on the buckle 234, when the clamping member 224 is fastened to the buckle 234, the clamping member 224 abuts against the inner surface of the inclined groove 234a and is difficult to slide off the buckle 234 under the limit of the edge of the inclined groove 234a, thereby further improving the stability of the connection between the movable limiting member 230 and the fixed limiting member 220.

Referring to fig. 4, in an embodiment, the ultrasonic welding machine further includes a toggle member 300, and the toggle member 300 is far away from the positioning pin 250 and connected to the movable limiting member 230. By arranging the toggle member 300 on the movable limiting member 230, in the positioning operation process of the first workpiece 20 to be welded, only the toggle member 300 needs to be pulled, so that the toggle member 300 drives the movable limiting member 230 to be far away from or close to the fixed limiting member 220, and the first workpiece 20 to be welded can be placed in the installation space 250, thereby effectively reducing the operation difficulty of the movable limiting member 230 and improving the positioning efficiency of the first workpiece 20 to be welded. In one embodiment, the control ball 400 is disposed at the end of the toggle member 300. By arranging the control ball 400 at the end of the toggle member 300, in the process of pulling the toggle member 300, an operator can hold the control ball 400 to drive the toggle member 300 to move, so as to reduce the injury of the end of the toggle member 300 to the hands of the person.

The auxiliary positioning member 240 is used for positioning the second workpiece 30 to be welded, so as to prevent the problem that the part to be welded of the second workpiece 30 to be welded is misaligned with the part to be welded of the first workpiece 20 to be welded due to the sliding of the second workpiece 30 to be welded on the first workpiece 20 to be welded, and thus the welding quality of the product is ensured. In an embodiment, a semi-circular arc groove 241 is disposed at an end of the auxiliary positioning element 240 away from the supporting arm 120, and the semi-circular arc groove 241 is used for abutting against the second workpiece 30 to be welded and limiting the second workpiece 30 to be welded. The semi-arc groove 241 is formed at one end of the auxiliary positioning element 240, which is far away from the support arm 120, and the semi-arc groove 241 can semi-surround the second workpiece 30 to be welded and abut against the second workpiece 30 to be welded, so that the second workpiece 30 to be welded is prevented from shifting, and the limit of the second workpiece 30 to be welded is realized. It should be noted that, in an embodiment, a distance between the auxiliary positioning element 240 and the fixed limiting element 220 is between 5 mm and 20 mm, and preferably, the distance between the auxiliary positioning element 240 and the fixed limiting element 220 is 10 mm. By setting the distance between the auxiliary positioning element 240 and the fixed limiting element 220 to be 5 mm to 20 mm, the horizontal height of the auxiliary positioning element 240 can be raised, and the auxiliary positioning element 240 is ensured to half surround the second workpiece 30 to be welded all the time and abut against the second workpiece 30 to be welded, so as to position the second workpiece 30 to be welded.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. An ultrasonic welding machine is characterized by comprising a welding machine body and a positioning die, wherein the positioning die is arranged on the welding machine body,

the welding machine body comprises an operating platform, a supporting arm, a height adjusting mechanism, an ultrasonic generator, a transducer, an amplitude transformer and a welding head, wherein the operating platform is connected with one end of the supporting arm and is used for bearing a first workpiece to be welded and a second workpiece to be welded, the height adjusting mechanism is far away from the operating platform and is connected with the other end of the supporting arm, the ultrasonic generator is installed at the output end of the height adjusting mechanism, the input end of the transducer is connected with the output end of the ultrasonic generator, the output end of the transducer is connected with the input end of the amplitude transformer, the welding head is connected with the output end of the amplitude transformer and corresponds to the operating platform, and the welding head is used for driving the first workpiece to be welded and the second workpiece to be welded to vibrate and rub;

the positioning die is used for positioning the first workpiece to be welded and the second workpiece to be welded, the positioning die comprises a mounting seat, a fixed limiting part, a movable limiting part and an auxiliary positioning part, the mounting seat is arranged on the operating platform, the fixed limiting part is arranged on the mounting seat, the movable limiting part is connected with the fixed limiting part in a swinging way, the movable limiting part and the fixed limiting part surround to form an installation space, the installation space is used for accommodating the first workpiece to be welded and positioning the first workpiece to be welded, the auxiliary positioning piece is arranged between the welding head and the fixed limiting piece, one end of the auxiliary positioning piece is arranged on the supporting arm, and one end of the auxiliary positioning piece, which is far away from the supporting arm, is abutted against the second workpiece to be welded and limits the second workpiece to be welded.

2. An ultrasonic welding machine according to claim 1, wherein the positioning mold further comprises a positioning pin, a groove and a first inserting hole are formed on one side of the fixed limiting member, the groove is communicated with the first inserting hole, a first protruding block is disposed on one side of the movable limiting member adjacent to the fixed limiting member, a second inserting hole is formed on the first protruding block, the first protruding block is embedded in the groove, and the positioning pin sequentially penetrates through the first inserting hole and the second inserting hole and is connected with the mounting base.

3. An ultrasonic welding machine according to claim 2 wherein a recess is provided on a side of the fixed limiting member remote from the groove, and a second protrusion is provided on a side of the movable limiting member remote from the first protrusion, the second protrusion being inserted into the recess and abutting against an inner surface of the recess.

4. The ultrasonic welding machine according to claim 3, wherein a fastening block is disposed on a surface of the second protrusion facing away from the installation space, and a clamping member is disposed on a side of the fixed limiting member adjacent to the second protrusion, and is clamped in the fastening block and connected to the movable limiting member.

5. The ultrasonic welding machine of claim 4, wherein the buckle block is provided with an inclined groove, an opening of the inclined groove faces away from the clamping member, and an included angle between a tangent line at a connection position of the buckle block and the movable limiting member and the inclined groove is 30-60 degrees.

6. The ultrasonic welding machine of claim 4, wherein the clamping member comprises a fixing block and a clamping ring, the fixing block is connected with the fixing limiting member, and the clamping ring is rotatably connected with the fixing block and clamped with the buckling block.

7. An ultrasonic welding machine according to claim 2 further comprising a toggle member remote from the locating pin and connected to the moveable stop member.

8. The ultrasonic welding machine of claim 7, wherein the tip of the toggle member is provided with a control ball.

9. An ultrasonic welding machine according to claim 1 wherein the end of the auxiliary locating member remote from the support arm is provided with a semi-circular arc groove for abutting against the second workpiece to be welded.

10. An ultrasonic welding machine according to claim 9 wherein the distance between the auxiliary locating element and the fixed stop is between 5 mm and 20 mm.

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