CN112548305A

CN112548305A - Ultrasonic metal welding base for providing additional force

Info

Publication number: CN112548305A
Application number: CN202011385867.5A
Authority: CN
Inventors: 马遵农; 张延松; 赵亦希
Original assignee: Shanghai Jiaotong University
Current assignee: Shanghai Jiaotong University
Priority date: 2020-12-01
Filing date: 2020-12-01
Publication date: 2021-03-26
Anticipated expiration: 2040-12-01
Also published as: CN112548305B

Abstract

The invention discloses an ultrasonic metal welding base for providing additional force, which relates to the field of ultrasonic metal welding and comprises a base, a force monitoring module and an additional force module. The ultrasonic welding device can replace the traditional ultrasonic welding base, provides upward additional force in the welding process, and the pressure sensor can measure the pressure borne by the feedback sample in real time and form a feedback mechanism to regulate and control the output force, so that the magnitude of the additional force can be quickly and repeatedly regulated in the welding process.

Description

Ultrasonic metal welding base for providing additional force

Technical Field

The invention relates to the field of ultrasonic metal welding, in particular to an ultrasonic metal welding base for providing additional force.

Background

The welding force and the ultrasonic vibration of the existing metal ultrasonic welding machine are both provided by a welding head, and a welding base only plays a role in supporting and clamping a sample in the welding process. In the ultrasonic welding of the multilayer metal sheets, ultrasonic energy can be attenuated layer by layer in the downward transmission process, so that the metal foil at the bottom layer cannot obtain enough ultrasonic energy, and cold welding is easy to occur.

Accordingly, those skilled in the art have endeavored to develop an ultrasonic metal welding base for providing additional force, which can be used with the existing ultrasonic welding machine on the market to replace the conventional welding base, and which can provide upward additional force during welding process by using an additional force device in the base, and an internal pressure sensor which can monitor the magnitude of the combined welding force in real time and feed back and correct the output force of the piezoelectric driver.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, the technical problem to be solved by the present invention is how to introduce an upward additional welding force at the bottom and measure and control the additional welding force during ultrasonic welding of multiple metal foils.

In order to achieve the above object, the present invention provides an ultrasonic metal welding base for providing an additional force, comprising a base, a force monitoring module and an additional force module, wherein the base is connected to a base plate of an ultrasonic metal welding machine, the force monitoring module comprises a pressure sensor and a circular connecting member, the pressure sensor and the additional force providing device are connected through the circular connecting member, the pressure sensor is connected to the base, the additional force module comprises an additional force providing device and a rectangular connecting member, the additional force providing device is connected to the rectangular connecting member, and the additional force providing device can provide an additional force which can be adjusted upwards in a welding process.

Further, the means for providing additional force is one or more piezoelectric actuators.

Further, the ultrasonic metal welding base further comprises a welding tooth module, the welding tooth module comprises a welding tooth and a sample clamp, the welding tooth is connected with the rectangular connecting piece, and the sample clamp is connected with the welding tooth.

Further, the piezoelectric driver is of a laminated type.

Furthermore, the base and the bottom plate of the ultrasonic metal welding machine are connected through a fastening screw, and the position of the welding teeth can be adjusted by adjusting the position of the fastening screw on the bottom plate of the ultrasonic metal welding machine.

Furthermore, circular holes are formed in two ends of the welding teeth, and the welding teeth are connected with the rectangular connecting piece through fastening screws.

Furthermore, four threaded holes are formed in the welding teeth, and the sample clamp is connected with the welding teeth through fastening studs and nuts.

Further, the sample holder is designed with a geometrically shaped surface, a rough surface or a smooth surface.

Furthermore, the pressure sensor is connected with the ultrasonic welding machine, and the pressure sensor can monitor the welding force in the welding process in real time.

Furthermore, the ultrasonic metal welding base is connected with the ultrasonic welding machine, and the ultrasonic metal welding base can adjust the welding force in the welding process according to the setting of the ultrasonic welding machine.

In another preferred embodiment of the present invention, said means for providing additional force is one or more servo motors.

The invention provides an ultrasonic metal welding base for providing additional force, which can be used together with the existing ultrasonic welding machine on the market, and utilizes an additional force device in the base, and upward additional welding force can be introduced at the bottom of a plurality of layers of metal foils in the welding process to improve the ultrasonic energy input of lower-layer metal, so that the deformation and heat generation of the lower-layer metal foils and contact surfaces are increased, and the lower-layer contact surfaces are well welded. The pressure sensor in the base can monitor the magnitude of the additional welding force in real time and feed back and correct the output force of the piezoelectric driver.

The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.

Drawings

FIG. 1 is a schematic diagram of an ultrasonic metal bonding base structure for providing additional force in accordance with a preferred embodiment of the present invention;

FIG. 2 is a side view of an ultrasonic metal welding base for providing additional force in accordance with a preferred embodiment of the present invention;

FIG. 3 is a diagram of the effect of an ultrasonic metal bonding base installation for providing additional force in accordance with a preferred embodiment of the present invention.

The method comprises the following steps of 1-base, 2-round connecting piece, 3-piezoelectric driver, 4-rectangular connecting piece, 5-welding tooth, 6-piezoelectric driver connecting screw, 7-welding tooth fixing screw, 8-clamp clamping stud and nut, 9-sample clamp, 10-pressure sensor, 11-ultrasonic welding head, 12-ultrasonic welding machine bottom plate, 13-base fastening screw, 14-bottom plate sliding groove and 15-ultrasonic metal welding base.

Detailed Description

The technical contents of the preferred embodiments of the present invention will be more clearly and easily understood by referring to the drawings attached to the specification. The present invention may be embodied in many different forms of embodiments and the scope of the invention is not limited to the embodiments set forth herein.

In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.

As shown in fig. 1, the base 1 is disposed at the bottom of the whole device, the pressure sensor 10 and the circular connector 2 are connected to the top of the base 1 through a threaded connection or other connection methods, the piezoelectric actuator 3 is fixed to the top of the pressure sensor 10 and the top of the circular connector 2 through a threaded connection, the pressure sensor 10 can monitor the welding force in the welding process in real time, and the self-feedback adjustment of the welding force is realized through communication with a welding system. Rectangular connecting piece 4 passes through piezoelectric actuator connecting screw 6 to be connected in piezoelectric actuator 3's top, and piezoelectric actuator 3 adopts the lamination formula, possess higher response frequency, can be in the welding process of utmost point weak point, realize many times of welding force and adjust, can adopt the parallelly connected form of a plurality of piezoelectric actuator to satisfy the demand of high additional force, and piezoelectric actuator's specific quantity can be confirmed according to actual demand, also can adopt small-size servo motor to replace piezoelectric actuator 3 to provide the additional force. Weld tooth 5 and fix on rectangular connecting piece 4 through the welding tooth set screw 7 at both ends, it still prefabricated four screw holes on the tooth 5 to weld, be used for connecting sample anchor clamps 9, fasten the double-screw bolt through screwing up anchor clamps during welding, nut 8, can make sample anchor clamps 9 exert the pretightning force to the multilayer welding sample, prevent that the sample from taking place to slide in welding process, sample anchor clamps can design for the surface that has certain geometric shape, inside embedding foil when the welding, prevent the relative slip from appearing, also can design as required for the plane that has certain roughness, or smooth plane, sample anchor clamps can adopt the double-screw bolt, the fixed sample of nut realization, also can adopt other tight forms of clamp such as clamp formula. But weld tooth 5 innovation design shape, size etc. and guarantee that the trompil size and the position of both ends fastening screw 7 department are unanimous, just can install welding tooth 5 in the top of rectangular connecting piece 4, if the diameter and the position of four screw holes are unchangeable, just can install sample anchor clamps 9 on newly welding the tooth.

As shown in FIG. 2, the structure of the invention mainly comprises a base 1, a force monitoring module, an additional force module and a welding tooth module, wherein the base 1 supports the whole structure, is placed at the lowest end of all elements and plays a role in supporting and connecting an ultrasonic welding machine; the force monitoring module mainly comprises a pressure sensor 10 and a circular connecting piece 2, wherein the bottom of the pressure sensor 10 is connected to the base 1, the top of the pressure sensor 10 is connected with the circular connecting piece 2, and all elements above the circular connecting piece 2 are supported by the circular connecting piece 2; the additional force module mainly comprises a piezoelectric driver 3 and a rectangular connecting piece 4, the bottom of the piezoelectric driver 3 is assembled on the circular connecting piece 2, the top of the piezoelectric driver 3 is assembled with the rectangular connecting piece 4, the rectangular connecting piece 4 supports all elements above the piezoelectric driver, the base 1, the pressure sensor 10 and the piezoelectric driver 3 are sequentially stacked, and the position of the pressure sensor 10 can be exchanged with the piezoelectric driver 3 under the condition that the pressure sensor can truly reflect the pressure applied to a sample. The pressure sensor 10 and the base 1 are separated, are connected by threads, welding and the like, and can also be integrated. The welding tooth module mainly comprises a welding tooth 5 and a sample clamp 9, the welding tooth 5 is connected to the rectangular connecting piece 4 through a screw, and the sample clamp 9 is connected to the welding tooth 5 through a stud and a nut.

As shown in FIG. 3, an ultrasonic metal welding base 15 for providing additional force is installed on a base plate 12 of an ultrasonic welding machine, the position of a welding tooth on the ultrasonic metal welding base 15 can be adjusted to be opposite to a welding tooth on an ultrasonic welding head 11 by adjusting the position of a base fastening screw 13 in a base plate sliding groove 14, the ultrasonic metal welding base 15 can be in real-time communication with the ultrasonic welding machine to obtain a welding program of the welding machine, and a controller sets the welding program at a specified time to realize the adjustment of the welding force, so that the time when a piezoelectric driver 3 outputs the additional force is accurately controlled, a feedback mechanism can be formed according to a numerical value fed back by a pressure sensor, and the system pressure is prevented from exceeding a safety threshold.

The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims

1. The utility model provides an ultrasonic metal welding base for providing additional power, includes base, power monitoring module and additional power module, its characterized in that, the base links to each other with ultrasonic metal welding machine's bottom plate, power monitoring module includes pressure sensor and circular connecting piece, pressure sensor with the device that provides additional power passes through circular connecting piece connects, pressure sensor with the base links to each other, additional power module is including device and the rectangle connecting piece that provides additional power, the device that provides additional power with the rectangle connecting piece links to each other, the device that provides additional power can provide the additional power of upwards adjustable in welding process.

2. An ultrasonic metal bonding pad for providing an additional force as set forth in claim 1 wherein said means for providing an additional force is one or more piezoelectric actuators.

3. An ultrasonic metal welding base for providing an additional force as set forth in claim 1 further comprising a tooth module including a welding tooth attached to said rectangular connector and a sample holder attached to said welding tooth.

4. An ultrasonic metal bonding pad for providing an additional force as set forth in claim 2 wherein the piezoelectric driver is laminated.

5. An ultrasonic metal welding foot for applying an additional force as set forth in claim 1 wherein said foot is attached to the base plate of said ultrasonic metal welder with a set screw and the position of said welding teeth can be adjusted by adjusting the position of said set screw on the base plate of said ultrasonic metal welder.

6. An ultrasonic metal welding base for applying an additional force as set forth in claim 1 wherein said welding teeth have circular holes at both ends and said welding teeth are connected to said rectangular connecting member by fastening screws.

7. An ultrasonic metal welding base for applying additional force as defined in claim 1 wherein said tooth has four threaded holes and said sample holder is connected to said tooth by a fastening stud and nut.

8. An ultrasonic metal weld base for providing additional force as set forth in claim 1 wherein the specimen holder is designed with a geometrically shaped surface, a rough surface or a smooth surface.

9. An ultrasonic metal welding base for providing an additional force as set forth in claim 1 wherein said pressure transducer is connected to said ultrasonic welder and said pressure transducer monitors the weld force during the welding process in real time.

10. An ultrasonic metal welding base for providing an additional force as set forth in claim 1 wherein said ultrasonic metal welding base is connected to said ultrasonic welder, said ultrasonic metal welding base being adjustable in welding force during welding according to settings of said ultrasonic welder.