CN220591878U

CN220591878U - Self-cooling type bottom die structure for ultrasonic welding

Info

Publication number: CN220591878U
Application number: CN202322257378.7U
Authority: CN
Inventors: 傅煜; 朱永明; 袁斐; 郭超平
Original assignee: Seksun Technology Suzhou Co ltd
Current assignee: Seksun Technology Suzhou Co ltd
Priority date: 2023-08-22
Filing date: 2023-08-22
Publication date: 2024-03-15
Anticipated expiration: 2033-08-22

Abstract

The utility model discloses a self-cooling bottom die structure for ultrasonic welding, which comprises a bottom die with a part positioning area formed on the top surface, wherein a cooling groove recessed upwards is formed on the bottom surface of the bottom die, the cooling groove comprises an annular diversion trench, an air inlet groove and an air exhaust groove which are respectively communicated with the diversion trench, and in the orthographic projection in the vertical direction, the positioning area is positioned in the annular area formed by the diversion trench; the bottom die structure further comprises a die holder, an air inlet channel and an air exhaust channel are arranged on the die holder, wherein the bottom die is in sealing fit with the top surface of the die holder from the bottom surface, and the air inlet channel and the air exhaust channel are respectively communicated with the air inlet groove and the air exhaust groove. On one hand, the self-cooling of the bottom die can be realized from the inside of the bottom die, so that the temperature of a contact area between a part and the bottom die is stably controlled, and the problem of part deformation or adhesion is effectively solved; on the other hand, the condensate water generated by the too low temperature of the outer surface of the bottom die is avoided, and the welding stability is ensured.

Description

Self-cooling type bottom die structure for ultrasonic welding

Technical Field

The utility model belongs to the technical field of ultrasonic welding, and particularly relates to a self-cooling bottom die structure for ultrasonic welding.

Background

Ultrasonic welding is the conversion of 50/60 hertz current into 15, 20, 30 or 40KHz electrical energy by an ultrasonic generator. The converted high frequency electrical energy is again converted by the transducer into an equally frequent mechanical motion, which is then transferred to the horn by a set of horn devices that vary the amplitude. The horn transfers the received vibrational energy to the joint of the workpieces to be welded, where it is frictionally converted into heat energy, thereby causing the surfaces of the two objects to rub against each other to form a fusion between the molecular layers. The bottom die is used as an important component of ultrasonic welding and plays a role in fixing and supporting the lower-layer material.

At present, because heat is concentrated on the bottom die because of high-frequency friction in welding, the problems of adhesion between parts and the bottom die during welding, deformation of the parts during demolding and the like are caused, and therefore, in order to prevent heat accumulation of the bottom die, the bottom die needs to be cooled in the ultrasonic welding process. The traditional cooling means is air cooling, namely, continuously blowing cooling air flow to the outer surface of the bottom die through an external air source.

However, in the actual welding process, the traditional external air cooling mode can only cool the outer surface of the bottom die, and the contact area of the part and the bottom die forms a cooling dead angle, and a large amount of heat is easily accumulated in the bottom die under the heat transfer, so that the temperature of the contact area of the part and the bottom die is high, the cooling effect is poor, and the part is easily deformed or stuck on the bottom die during demolding; meanwhile, when the cooling airflow cools the outer surface of the bottom die, the outer surface of the bottom die is too low, condensed water is easy to generate, and welding is unstable.

Disclosure of Invention

The utility model aims to solve the technical problem of overcoming the defects of the prior art and providing an improved self-cooling bottom die structure for ultrasonic welding.

In order to solve the technical problems, the utility model adopts the following technical scheme:

a self-cooling bottom die structure for ultrasonic welding comprises a bottom die with a part positioning area formed on the top surface, wherein a cooling groove recessed upwards is formed on the bottom surface of the bottom die, the cooling groove comprises an annular diversion trench, an air inlet groove and an air exhaust groove which are respectively communicated with the diversion trench, and in the orthographic projection in the vertical direction, the positioning area is positioned in the annular area formed by the diversion trench; the bottom die structure further comprises a die holder, an air inlet channel and an air exhaust channel are arranged on the die holder, wherein the bottom die is in sealing fit with the top surface of the die holder from the bottom surface, the air inlet channel and the air exhaust channel are respectively communicated with the air inlet groove and the air exhaust groove, and during welding, cooling air flows sequentially pass through the air inlet channel, the air inlet groove, the diversion trench, the air exhaust groove and the air exhaust channel to exchange heat with a positioning area of the bottom die.

Preferably, the air inlet groove and the air exhaust groove are respectively arranged on two opposite sides of the diversion groove, and the diversion groove, the air inlet groove and the air exhaust groove form a convex shape. Here, through the overall arrangement of guiding gutter, air inlet groove, exhaust groove three, when cooling air flow gets into the cooling tank, can realize the reposition of redundant personnel, that is, the reposition of redundant personnel when cooling air flow gets into the guiding gutter from the air inlet groove to get into the exhaust groove from two directions along the guiding gutter, effectively promote cooling efficiency.

Specifically, the central lines of the air inlet groove, the air exhaust groove and the diversion trench are overlapped.

Preferably, in the orthographic projection in the vertical direction, the area of the air inlet slot is smaller than the area of the air outlet slot. When the cooling air flow enters the cooling groove, a pressure difference is formed between the air inlet groove and the air exhaust groove, so that the flow speed of the cooling air flow in the cooling groove is accelerated, and the cooling effect is improved.

Preferably, the air inlet groove, the air exhaust groove and the diversion groove have the same groove depth. The bottom die is convenient to process, and the cooling airflow can be ensured to flow stably.

Specifically, the depths of the air inlet groove, the air exhaust groove and the diversion groove are d1, the thickness of the bottom die is d2, wherein d1 is more than or equal to 0.4d2 and less than or equal to 0.65d2. Here, the temperature of the bottom die surface is easily controlled to be in a proper range by the layout of the groove depth.

Preferably, the top surface of the die holder forms an air inlet hole communicated with the air inlet channel and an air outlet hole communicated with the air outlet channel, and in the orthographic projection in the vertical direction, the air inlet hole is overlapped with the air inlet slot, and the air outlet hole is overlapped with the air outlet slot. The structure is simple, and the air inlet channel and the air exhaust channel are convenient to be communicated with the air inlet groove and the air exhaust groove in alignment during the assembly of the die holder and the bottom die.

Specifically, the air inlet and the air outlet are arranged in a staggered manner in the arrangement directions of the air inlet groove, the air outlet groove and the diversion trench.

Further, the die holder comprises a first base body and a second base body extending upwards from the first base body, wherein an air inlet hole and an air outlet hole are formed in the top surface of the second base body, and the second base body and the bottom die are arranged in a flush manner from the outer wall.

In addition, the air inlet channel and the air exhaust channel have the same structure; the side wall of the second seat body is provided with an interface, and the air inlet channel comprises a first channel which is communicated with the interface and horizontally extends, and a second channel which vertically extends upwards from the first channel and is communicated with the air inlet hole.

Due to the implementation of the technical scheme, compared with the prior art, the utility model has the following advantages:

the die block of prior art is not good with part contact area cooling effect in the welding, the die block surface cools down too fast and easily produces the comdenstion water under outside air current cooling to the part is yielding and welding unstable defect when there is the drawing of patterns, and this application carries out global design to the die block structure, solves various not enough of prior art ingeniously. By adopting the bottom die structure, the cooling air flow is discharged from the air exhaust channel after sequentially passing through the air inlet channel, the diversion trench and the air exhaust channel, wherein when the cooling air flow flows in the annular diversion trench, the cooling air flow exchanges heat with the part positioning area of the bottom die. Therefore, compared with the prior art, the self-cooling of the bottom die can be realized from the inside of the bottom die, so that the temperature of a contact area between a part and the bottom die is stably controlled, and the problem of part deformation or adhesion is effectively solved; on the other hand, the condensate water generated by the too low temperature of the outer surface of the bottom die is avoided, and the welding stability is ensured.

Drawings

The utility model will be described in further detail with reference to the drawings and the detailed description.

FIG. 1 is a schematic exploded view of a self-cooling die block structure for ultrasonic welding according to the present utility model;

FIG. 2 is a schematic perspective view of the bottom mold of FIG. 1 from another view;

FIG. 3 is a schematic view of the structure of FIG. 2 from the view angle A;

FIG. 4 is a schematic cross-sectional view of B-B of FIG. 3;

wherein: 1. a bottom die; q, positioning area; c. a cooling tank; c1, diversion trenches; c2, an air inlet groove; c3, an exhaust groove;

2. a die holder; 21. a first base; 22. a second seat body; k1, an air inlet hole; k2, exhaust holes; t 1, an air inlet channel; t 11, a first channel; t 12, a second channel; and t 2, an exhaust channel.

Detailed Description

In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other forms than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the application, and therefore the application is not to be limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.

In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

As shown in fig. 1 to 4, the self-cooling die structure for ultrasonic welding according to the present embodiment includes a die block 1 and a die holder 2.

Specifically, die block 1 is the cuboid form, and die block 1's top surface has part location district q, and die block 1 is formed with upwards sunken cooling tank c from the bottom surface, and wherein cooling tank c includes annular guiding gutter c 1, air inlet groove c2 and the exhaust groove c3 that are linked together respectively with guiding gutter c 1, in vertical direction's orthographic projection, location district q is located the annular region that guiding gutter c 1 formed.

For convenience of implementation, the air inlet groove c2 and the air outlet groove c3 are respectively arranged at two opposite sides of the air guide groove c 1, wherein the air guide groove c 1, the air inlet groove c2 and the air outlet groove c3 respectively form a convex shape, and in the orthographic projection in the vertical direction, the area of the air inlet groove c2 is smaller than that of the air outlet groove c 3; the central lines of the air inlet groove c2, the air exhaust groove c3 and the diversion groove c 1 are overlapped; the air inlet groove c2, the air exhaust groove c3 and the guide groove c 1 have equal groove depths, the air inlet groove, the air exhaust groove and the guide groove have the groove depths of d1, the bottom die has the thickness of d2, wherein d1 is more than or equal to 0.4d2 and less than or equal to 0.65d2, and in some specific embodiments, d1=0.45d2.

In this example, be equipped with air inlet passageway t 1 and passageway t 2 of airing exhaust on the die holder 2, wherein die block 1 seals laminating mutually from the bottom surface and the top surface of die holder 2, and air inlet passageway t 1 and passageway t 2 of airing exhaust are linked together with air inlet groove c2 and groove c3 of airing exhaust respectively, and during the welding, the cooling air current passes air inlet passageway t 1, air inlet groove c2, guiding gutter c 1, groove c3 of airing exhaust and passageway t 2 of airing exhaust in proper order in order to carry out the heat exchange with the location q of die block 1.

Specifically, the die holder 2 includes a first base 21, and a second base 22 extending upward from the first base 21, where the second base 22 is disposed flush with the bottom die 1 from the outer wall, and an air inlet k 1 communicating with the air inlet t 1 and an air outlet k2 communicating with the air outlet t 2 are formed on the top surface of the second base 22, in the vertical orthographic projection, the air inlet k 1 coincides with the air inlet c2, and the air outlet k2 coincides with the air outlet c 3; the first seat 21 and the second seat 22 are integrally formed.

Meanwhile, the air inlet hole k 1 and the air outlet hole k2 are arranged in a staggered manner in the arrangement directions of the air inlet groove c2, the air outlet groove c3 and the diversion groove c 1.

In addition, the air inlet channel t 1 and the air outlet channel t 2 have the same structure, and the structure of the air inlet channel t 1 is described herein, so that the structure of the air outlet channel t 2 is also clear. The second seat 22 has a port k3 formed on a side wall thereof, and the air inlet channel t 1 includes a first channel t 11 which is communicated with the port k3 and extends horizontally, and a second channel t 12 which extends vertically upward from the first channel t 11 and is communicated with the air inlet hole k 1. In some embodiments, the air inlet channel t 1 and the air outlet channel t 2 are respectively located on two opposite side walls of the second base 22, and are connected to the corresponding interfaces by a blower or an exhaust fan to form a cooling air flow.

In summary, by adopting the device, in the bottom die structure, cooling air flows from the air inlet channel to the air outlet channel after sequentially passing through the air inlet channel, the air guide groove and the air outlet channel, wherein when the cooling air flows in the annular air guide groove, the cooling air exchanges heat with the part positioning area of the bottom die. Therefore, compared with the prior art, the self-cooling of the bottom die can be realized from the inside of the bottom die, so that the temperature of a contact area between a part and the bottom die is stably controlled, and the problem of part deformation or adhesion is effectively solved; on the other hand, the condensate water generated by the too low temperature of the outer surface of the bottom die is avoided, and the welding stability is ensured; in the third aspect, through the layout of the diversion trench, the air inlet trench and the air exhaust trench, when the cooling air flow enters the cooling trench, the diversion can be realized, namely, the cooling air flow is diverted when entering the diversion trench from the air inlet trench and enters the air exhaust trench from two directions along the diversion trench, so that the cooling efficiency is effectively improved; in the fourth aspect, when the cooling air flow enters the cooling groove, a pressure difference is formed between the air inlet groove and the air exhaust groove, so that the flow speed of the cooling air flow in the cooling groove is accelerated, and the cooling effect is improved; in the fifth aspect, the temperature of the bottom die surface is conveniently controlled in a proper range by the layout of the groove depth.

The present utility model is described in detail above, but the present utility model is not limited to the above-described embodiments. All equivalent changes or modifications made in accordance with the spirit of the present utility model should be construed to be included in the scope of the present utility model.

Claims

1. The utility model provides a self-cooling die block structure for ultrasonic welding, its includes from the die block of top surface formation part location area, its characterized in that: the bottom die is provided with an upward concave cooling groove from the bottom surface, wherein the cooling groove comprises an annular diversion groove, an air inlet groove and an air exhaust groove which are respectively communicated with the diversion groove, and in the orthographic projection in the vertical direction, the positioning area is positioned in an annular area formed by the diversion groove; the bottom die structure further comprises a die holder, an air inlet channel and an air exhaust channel are arranged on the die holder, the bottom die is in sealing fit with the top surface of the die holder from the bottom surface, the air inlet channel and the air exhaust channel are respectively communicated with the air inlet channel and the air exhaust channel, and during welding, cooling air flows sequentially pass through the air inlet channel, the air guide groove, the air exhaust channel and the air exhaust channel to exchange heat with a positioning area of the bottom die.

2. The self-cooling die block structure for ultrasonic welding according to claim 1, wherein: the air inlet groove and the air exhaust groove are respectively arranged on two opposite sides of the diversion trench, and the diversion trench and the air inlet groove and the air exhaust groove form a convex shape.

3. The self-cooling die block structure for ultrasonic welding according to claim 2, wherein: the center lines of the air inlet groove, the air exhaust groove and the diversion groove are overlapped.

4. The self-cooling die block structure for ultrasonic welding according to claim 1, wherein: in the orthographic projection in the vertical direction, the area of the air inlet groove is smaller than that of the air exhaust groove.

5. The self-cooling die block structure for ultrasonic welding according to claim 1, wherein: the air inlet groove, the air exhaust groove and the diversion groove have the same groove depth.

6. The self-cooling die block structure for ultrasonic welding according to claim 5, wherein: the depth of the air inlet groove, the depth of the air exhaust groove and the depth of the guide groove are d1, the thickness of the bottom die is d2, and d2 is more than or equal to 0.4d2 and less than or equal to 0.65d2.

7. The self-cooling die block structure for ultrasonic welding according to claim 2, wherein: the top surface of die holder form with the fresh air inlet that the air inlet passageway is linked together, with the exhaust hole that the air exhaust passageway is linked together, in vertical direction's orthographic projection, the fresh air inlet with the air inlet groove coincidence, the exhaust hole with the exhaust groove coincidence sets up.

8. The self-cooling die block structure for ultrasonic welding according to claim 7, wherein: the air inlet hole and the exhaust hole are arranged in a staggered manner in the arrangement directions of the air inlet groove, the exhaust groove and the diversion groove.

9. The self-cooling die block structure for ultrasonic welding according to claim 7 or 8, wherein: the die holder comprises a first base body and a second base body extending upwards from the first base body, wherein the top surface of the second base body is provided with an air inlet hole and an air outlet hole, and the second base body and the bottom die are arranged in a flush manner from the outer wall.

10. The self-cooling die block structure for ultrasonic welding according to claim 9, wherein: the air inlet channel and the air exhaust channel have the same structure; the side wall of the second seat body is provided with an interface, and the air inlet channel comprises a first channel which is communicated with the interface and horizontally extends, and a second channel which vertically extends upwards from the first channel and is communicated with the air inlet hole.