CN212634790U

CN212634790U - Welding device capable of automatically replacing pressing tool

Info

Publication number: CN212634790U
Application number: CN202020119011.2U
Authority: CN
Inventors: 张海涛; 刘卫衡; 韩冬冬; 吴家志; 桂永红; 翟友琦
Original assignee: Foshan Paige Automobile Plastic Technology Co ltd
Current assignee: Foshan Paige Automobile Plastic Technology Co ltd
Priority date: 2020-01-18
Filing date: 2020-01-18
Publication date: 2021-03-02
Anticipated expiration: 2030-01-18

Abstract

The utility model relates to the technical field of machining, in particular to a welding device capable of automatically replacing a pressing tool, which comprises a frame, a lifting mechanism, a three-coordinate module welding mechanism, a pressing tool extending mechanism, a conveying mechanism and a pressure plate, wherein the lifting mechanism controls the pressing tool to lift, the three-coordinate module welding mechanism above the lifting mechanism is matched with the corresponding pressing tool to weld a product, a second driving device drives a pressing tool working groove to be matched and butted with a pressing tool placing groove, and then a first driving device drives the pressure plate to be replaced, so that the automatic replacement of the pressing tool in the welding process is realized; detecting the position of the pressure plate by using an inductive switch; the three-coordinate module welding mechanism performs welding by using a plurality of groups of welding assemblies; the two groups of conveying mechanisms are used for realizing the circular conveying of products, so that the workers can take and place the products conveniently. Through using the utility model discloses, can improve the machining efficiency to plastic part ultrasonic bonding to be convenient for carry out automatic pipelined's processing production to it.

Description

Welding device capable of automatically replacing pressing tool

Technical Field

The utility model relates to the technical field of machining, specifically be a welding set that can change tamp automatically.

Background

For a product which is formed by assembling a plurality of plastic parts and then welding the plastic parts, a large amount of welding processing is often needed, when the welding is performed, if a large amount of welding heads are used for completing the welding of all welding positions at one time, the welding is difficult to realize or the processing efficiency is low due to the excessive number of welding heads, the welding is often needed in batches, a plurality of different pressing tools are used, and the pressing tools are often needed to be replaced for many times in the welding process. Today, the material demand of people is increasing day by day, welding and presser replacement are carried out by manpower, and the market demand of people today cannot be met no matter the efficiency and the quality of welding.

Disclosure of Invention

An object of the utility model is to provide a to solve the problem that can't be solved to prior art that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a welding device capable of automatically replacing a press comprises a rack and lifting mechanisms fixedly arranged on the rack, wherein the two lifting mechanisms are arranged at intervals in the front and at the back, at least one side of the left side and the right side of each lifting mechanism is provided with a press extending mechanism at intervals, at least one group of three-coordinate module welding mechanisms are arranged above the lifting mechanisms, a conveying mechanism is arranged below the lifting mechanisms, a jacking mechanism is arranged on the conveying mechanism, a tire mold is placed on the conveying mechanism, and the jacking mechanism is positioned below the tire mold; and the three-coordinate module welding mechanism, the conveying mechanism and the pressing tool extending mechanism are all fixedly arranged on the rack.

Preferably, the lifting mechanism comprises a welding assembly and a portal frame, and the welding assembly is movably arranged on the portal frame; the welding assembly comprises a first support, a second support and a third support, wherein the first support is movably arranged on a guide rail of the portal frame, the second support is movably arranged on the guide rail of the first support, the third support is movably arranged on the guide rail of the second support, and the portal frame, the guide rails of the first support and the second support are mutually in a spatial vertical relationship; the first support, the second support and the third support are driven by an electric screw rod mechanism to slide, and an ultrasonic welding head is fixedly arranged on the third support.

Preferably, two sets of three-coordinate module welding mechanisms are arranged above the lifting mechanism, and two sets of welding assemblies are arranged on the portal frame at intervals.

Preferably, two groups of conveying mechanisms which are arranged at intervals up and down are arranged below the lifting mechanism; the conveying mechanism comprises speed multiplying chains which are arranged at intervals at the left and the right, connected through a transmission shaft and driven by a servo motor; the jacking mechanism is arranged on the conveying mechanism on the upper layer and arranged between the speed doubling chains, and the left side and the right side of the tire mold are respectively placed on the speed doubling chains.

Preferably, the jacking mechanism comprises a jacking plate jacking cylinder, the bottom of the jacking plate is fixedly provided with a guide pillar and a rotatable roller, and the jacking plate is embedded into the rack in a lifting manner through the guide pillar; and a wedge block is arranged on one side of the roller, the wedge block is fixedly connected with a piston rod of the jacking cylinder, the inclined surface of the wedge block faces the outer rolling curved surface of the roller, the jacking cylinder can drive the wedge block to move towards the roller, and the clamping fixture is lifted to be separated from the conveying mechanism by jacking the jacking plate.

Preferably, the press extending mechanism comprises at least two horizontal supporting platforms and a first driving device which are arranged at intervals up and down, the first driving device is positioned above the supporting platforms, and the first driving device is provided with a first driving piece capable of horizontally moving left and right; the bearing platform is provided with a pressing tool, and the pressing tool is connected with the tail end of the first driving part through a buckle structure.

Preferably, elevating system includes that the tamp works groove and second drive arrangement, two the notch in tamp work groove sets up relatively, two the direction of guide in tamp work groove all with the moving direction of first driving piece is unanimous, two the interior bottom surface in tamp work groove is located same horizontal plane, second drive arrangement is equipped with the second driving piece that can vertically move, the end of second driving piece with the last fixed surface of tamp work groove is connected.

Preferably, the bearing platform comprises two pressing tool placing grooves which are arranged at intervals in the front and back direction, notches of the two pressing tool placing grooves are arranged oppositely, the guiding directions of the two pressing tool placing grooves are consistent with the moving direction of the first driving piece, and the inner bottom surfaces of the two pressing tool placing grooves are located on the same horizontal plane.

Preferably, the upper surface of the pressing tool working groove is connected with at least one pressing device, a telescopic pressing rod is arranged on the pressing device, and the pressing rod penetrates through the top of the pressing tool working groove and extends into the pressing tool working groove.

Preferably, the upper surfaces of the two pressing tool placing grooves are fixedly provided with a first inductive switch, and the upper surfaces of the two pressing tool working grooves are fixedly provided with at least one second inductive switch.

Compared with the prior art, the beneficial effects of the utility model are that: the lifting mechanism controls the pressing tool to lift, the three-coordinate module welding mechanism above the lifting mechanism is matched with the corresponding pressing tool to weld a product, the second driving device drives the pressing tool working groove to be matched and butted with the pressing tool placing groove, and the first driving device drives the pressing disc to replace, so that the automatic replacement of the pressing tool in the welding process is realized; the position of the pressure plate is detected by using the first inductive switch and the second inductive switch, so that automatic control is facilitated; a plurality of groups of welding assemblies are used for welding, so that the welding speed is increased; the two groups of conveying mechanisms are used for realizing circular conveying of the tire membranes and products, so that workers can conveniently take and place the tire membranes and the products, the efficiency is improved, and the occupied space is reduced.

Drawings

Fig. 1 is a schematic structural view of a three-dimensional viewing angle of the present invention;

fig. 2 is a front view of the present invention;

fig. 3 is a schematic structural view of a three-dimensional view angle of the three-dimensional module welding mechanism, the lifting mechanism, the conveying mechanism and the jacking mechanism of the present invention;

FIG. 4 is an enlarged view taken at I of FIG. 3;

FIG. 5 is an exploded view of the internal structure of the present invention;

FIG. 6 is an enlarged view at P of FIG. 5;

FIG. 7 is an enlarged view taken at N of FIG. 6;

FIG. 8 is an enlarged view taken at O in FIG. 5;

fig. 9 is an enlarged view at K in fig. 8.

Fig. 10 is a schematic structural view of a three-dimensional viewing angle of the conveying mechanism and the jacking mechanism of the present invention;

fig. 11 is an enlarged view at G in fig. 10.

In the figure: 1. a frame; 2. a lifting mechanism; 3. a press extension mechanism; 4. a three-coordinate module welding mechanism; 5. a conveying mechanism; 6. pressing; 201. a second driving device; 202. a pressing tool working groove; 203. a second inductive switch; 204. a pressing device; 205. a second driving member; 301. a first driving device; 302. a holding groove of the pressing tool; 303. a first driving member; 304. a first inductive switch; 305. a connecting rod; 401. a gantry; 402. a first bracket; 403. a second bracket; 404. a third support; 405. welding a head by ultrasonic welding; 501. a speed doubling chain; 701. a third driving device; 702. a third driving member; 703. a second connecting plate; 704. a second guide post; 801. a jacking plate; 802. a guide post; 803. a roller; 804. a wedge block; 805. and (5) jacking the cylinder.

Detailed Description

The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention. In addition, all the coupling/connection relationships mentioned herein do not mean that the components are directly connected, but mean that a better coupling structure can be formed by adding or reducing coupling accessories according to specific implementation conditions. The technical characteristics of the invention can be combined interactively on the premise of not conflicting with each other. Finally, it should be noted that the terms "center, upper, lower, left, right, vertical, horizontal, inner, outer" and the like as used herein refer to an orientation or positional relationship based on the drawings, which is only for convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms first, second and third as used herein are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The utility model provides a technical scheme refers to figure 1, figure 2, figure 3 and figure 5, but the welding set of automatic change tamp mainly comprises frame 1, elevating system 2, tamp extension mechanism 3, three-coordinate module welding mechanism 4, conveying mechanism 5 and tamp 6, and wherein elevating system 2, tamp extension mechanism 3, three-coordinate module welding mechanism 4 and the equal fixed mounting of conveying mechanism 5 are in frame 1.

Referring to fig. 5 and 6, the lifting mechanism 2 includes a second driving device 201 and two pressing tool working grooves 202, the notches of the two pressing tool working grooves 202 are disposed oppositely, and the front and rear sides of the pressing tool 6 are respectively embedded into the notches of the pressing tool working grooves 202 which are distributed at intervals in the front and rear directions.

The second driving device 201 is provided with a second driving member 205 capable of moving vertically, and the end of the second driving member 205 is fixedly connected with the upper surface of the pressing tool working groove 202 to drive the pressing tool working groove 202 to move up and down, so as to adjust the height of the pressing tool 6.

Referring to fig. 7, preferably, at least one hold-down device 204 is attached to the upper surface of the platen work groove 202, and the hold-down device 204 is capable of securing a hold-down on the hold-down device work groove 202. The pressing device 204 is provided with a telescopic pressing rod, and the pressing rod penetrates through the top of the presser working groove 202 and extends into the presser working groove. Two or more compression devices 204 can provide better fixation.

Referring to fig. 3, a three-coordinate die set welding mechanism 4 is arranged above the lifting mechanism 2, and a conveying mechanism 5 is arranged below the lifting mechanism. In the processing and production process, the tire molds are conveyed to the lower part of the lifting mechanism 2 through the speed doubling chain 501 of the conveying mechanism 5 and are positioned at the corresponding position below the pressing tool 6 fixed by the lifting mechanism 2. The product is placed on the moulding bed, the lifting mechanism 2 drives the pressing tool 6 to descend, the product is fixedly pressed on the moulding bed, and then the three-coordinate module welding mechanism 4 performs welding processing on the product.

Referring to fig. 4, three-coordinate module welding mechanism 4 mainly comprises portal frame 401 and welding assembly, and preferably, elevating system 2 top sets up two sets of three-coordinate module welding mechanism 4, and is provided with two sets of welding assemblies of interval about on the portal frame 401, and the welding of multiunit welding assembly jointly can further improve welding process's efficiency.

The welding assembly comprises a first bracket 402, a second bracket 403, a third bracket 404 and an ultrasonic welding head 405, wherein the first bracket 402 is movably arranged on a guide rail of a portal frame 401 and moves horizontally in the x-axis direction by referring to an xyz coordinate system in the drawing; the second bracket 403 is movably mounted on the guide rail of the first bracket 402 and horizontally moves in the y-axis direction; the third carriage 404 is movably mounted on a guide rail of the second carriage 403 and vertically moves in the Z-axis direction. The ultrasonic bonding head 405 is fixedly mounted on the third support 404. The guide rails of the gantry 401, the first bracket 402 and the second bracket 403 are in a mutually perpendicular spatial relationship, which facilitates calculation of the spatial position of the ultrasonic welding head 405.

In order to improve the processing accuracy of ultrasonic welding, the movement of the first bracket 402, the second bracket 403, and the third bracket 404 is driven by an electric screw mechanism having higher positional accuracy with respect to a rack-and-pinion mechanism or the like.

Preferably, 2 below of elevating system is provided with two sets of conveying mechanism 5 of interval arrangement from top to bottom, and in the production line, the conveying mechanism 5 that is in the top is responsible for the forward transport that needs carry out welded fetal membrane and product, and the conveying mechanism 5 that is in the below is responsible for the reverse transport of the fetal membrane that has already been processed and product, can realize the circulation transportation of fetal membrane and product, places the product that needs to carry out the welding and takes out the product that has already been accomplished in same station, can save the space that the production line occupy like this to improve the staff and get the work efficiency who puts the product.

Referring to fig. 3, fig. 10 and fig. 11, the conveying mechanism 5 includes speed-multiplying chains 501, the speed-multiplying chains 501 are arranged at intervals left and right, connected through a transmission shaft and driven by a servo motor, the jacking mechanism 8 is arranged on the conveying mechanism 5 on the upper layer and arranged between the speed-multiplying chains 501, and the left side and the right side of the tire mold are respectively placed on the speed-multiplying chains 501. Besides the speed-multiplying chain 501, the belt transmission mode and the like can be adopted, but the speed-multiplying chain 501 can ensure that the conveying position is more accurate, and the action is more rapid and flexible.

Referring to fig. 11, the jacking mechanism 8 includes a jacking plate 801 and a jacking cylinder 805, a guide pillar 802 and a rotatable roller 803 are fixedly disposed at the bottom of the jacking plate 801, and the jacking plate is inserted into the rack 1 in a liftable manner through the guide pillar 802; a wedge block 804 is arranged on one side of the roller 803, the wedge block 804 is fixedly connected with a piston rod of a jacking cylinder 805, an inclined surface of the wedge block 804 faces an outer rolling curved surface of the roller 803, and the jacking cylinder 805 can drive the wedge block 804 to move towards the roller 803, so that the tire mold is lifted up to be separated from the conveying mechanism 5 by jacking a jacking plate 801.

When the tire mold is conveyed to the lower part of the three-coordinate module welding mechanism 4 by the double-speed chain 501 of the conveying mechanism 5, the tire mold is positioned above the jacking mechanism 8. At this time, the jacking cylinder 805 drives the wedge block 804 to move towards the roller 803, the roller 803 is jacked by the inclined surface of the wedge block 804, and the jacking plate 801 is further driven to ascend, so that the bottom of the tire mold is separated from the double-speed chain 501, and the processing is facilitated. The lifting plate 801 is restrained in the moving path through the guide post 802, and the stability of the lifting action is guaranteed. If the product of the tire mold placed on the speed-doubling chain 501 is directly processed, the lack of sufficient friction force between the tire mold and the speed-doubling chain 501 can cause deviation of processing positioning, and the production quality is affected.

Because the welding position of product is more, in the ultrasonic bonding processing's in-process, to same product, often be equipped with a plurality of tamps 6, correspond different welding points respectively, consequently often need change tamp 6. For further improving ultrasonic bonding's production efficiency, the utility model discloses at least one side interval is provided with the tamp and stretches out mechanism 3 in elevating system 2's the left and right sides, stretches out mechanism 3 through this tamp and realizes the change to 2 middling pressure utensils 6 of elevating system.

Referring to fig. 5 and 8, the presser extension mechanism 3 includes at least two horizontal support platforms arranged at intervals up and down, wherein one of the support platforms is provided with the presser 6, and the other support platform is in a vacant state; when the pressing tool 6 is replaced, the pressing tool 6 in the lifting mechanism 2 is pushed to the supporting platform in the vacant state, and then the pressing tool 6 on the other supporting platform is pushed to the lifting mechanism 2. The pushing of the presser 6 is realized by the first driving device 301 driving the first driving member 303.

The bearing platform comprises two pressing tool placing grooves 302 which are arranged at intervals in the front-back direction, notches of the two pressing tool placing grooves 302 are arranged oppositely, the guiding directions of the two pressing tool placing grooves 302 are consistent with the moving direction of the first driving piece 303, and the inner bottom surfaces of the two pressing tool placing grooves 302 are located on the same horizontal plane. The front side and the rear side of the presser 6 are embedded into the notches of the presser placement groove 302, connected with the first driving member 303 through a buckle structure, and driven by the first driving member 303 to move.

Preferably, elevating system 2 left and right sides all is provided with three-dimensional module welding mechanism 4 at the interval for equipment can hold more tamps and carry out automatic the change, avoids because equipment can't hold a plurality of tamps and need manually change the tamp that the tamp stretches out in the mechanism in production and processing process.

The guiding directions of the two pressing tool working grooves 202 of the lifting mechanism 2 are consistent with the moving direction of the first driving piece 303, and the inner bottom surfaces of the two pressing tool working grooves 202 are located on the same horizontal plane, so that the pressing tool 6 located in the pressing tool extending mechanism 3 can be smoothly pushed to the pressing tool working grooves 202.

Referring to fig. 7 and 9, preferably, a first inductive switch 304 is fixedly disposed on the upper surface of each of the two presser placement grooves 302, and at least one second inductive switch 203 is fixedly disposed on the upper surface of each of the two presser work grooves 202. The position of the pressing tool on the pressing tool extending mechanism 3, which is not extended, is a standby position, the position of the pressing tool 6 on the lifting mechanism 2, which is used for work production, is a working position, the first inductive switch 304 is arranged at the position of the buckling structure when the pressing tool 6 is at the standby position, and the second inductive switch 203 is arranged at the position of the buckling structure when the pressing tool 6 is at the working position. Whether the position of the presser 6 is accurate when the presser is replaced and works is detected by using the first inductive switch 304 and the second inductive switch 203, so that the aim of automatic control is fulfilled.

The first driving device 301 and the second driving device 201 include any one of an air cylinder, a hydraulic cylinder, and a linear motor, the first driving device 301 and the second driving device 201 of the present invention are preferably air cylinders, and the first driving member 303 and the second driving member 205 are specifically piston rods.

The invention discloses a process for automatically replacing a pressing tool:

1. the fetal membrane and the product are conveyed to a welding position under the driving of the conveying mechanism 5 positioned above the fetal membrane, and after reaching an accurate position, the PLC controls the servo motor to stop driving the speed multiplying chain 501, and the fetal membrane and the product stop moving; then the PLC controls the jacking cylinder 805 to drive the wedge block 804, and pushes the jacking plate 801 to jack the moulding bed to separate from the speed doubling chain 501.

2. The second driving device 201 is controlled by the PLC to butt the presser working groove 202 to the presser placing groove 302 corresponding to the mold, then the first driving device 301 is controlled by the PLC to move the presser 6 from the presser placing groove 302 to the presser working groove 202, when the buckle structure on the presser 6 is sensed by the second sensing switch 203, the pressing rod on the pressing device 204 presses the presser 6, the second driving device 205 on the second driving device 201 drives the presser 6 to press the mold, and at this time, the first driving device 303 on the first driving device 301 is separated from the buckle structure connected with the presser 6, so that the presser 6 can descend smoothly.

3. The pressing tool 6 presses a product on a tire membrane, the PLC controls the electric screw rod mechanism to drive the first support 402, the second support 403 and the third support 404 to slide, the ultrasonic welding head 405 is moved to a corresponding welding position, and the product is welded.

4. After the product is welded for one time, the second driving device 201 raises the pressing tool 6 to the height before welding through the second driving element 205 under the control of the PLC, at this time, the first driving element 303 and the pressing tool 6 are clamped again through the fastening structure, finally, the first driving device 301 recovers the pressing tool 6 into the pressing tool placing groove 302 through the first driving element 303 under the control of the PLC, and when the fastening structure on the pressing tool 6 is sensed by the first sensing switch 304, the first driving device 301 stops operating.

5. The PLC controls the second driving device 201 to drive the pressing tool working groove 202 to move to the same height as the pressing tool placing groove 302 on which another pressing tool 6 is placed, and then the first driving device 301 and the first driving member 303 on the pressing tool placing groove 302 drive the pressing tool 6 to move into the pressing tool working groove 202, thereby realizing replacement of the pressing tool 6.

6. After the replacement is finished, the lifting mechanism 2 descends the pressing tool 6 again under the control of the PLC and presses the product, and then the three-coordinate module welding mechanism 4 performs welding again, so that the welding is finished for many times until all welding points are welded.

7. After all the welding of the products is completed, the PLC controls the jacking cylinder 805 to perform a retraction action to drive the wedge block 804 to retract, and the jacking plate 801 descends until the tire mold descends to the speed doubling chain 501. PLC control servo motor drive speed multiplication chain 501 carries child mould and product to next processing equipment to carry out welded child membrane and product with next a set of needs and carry over, and the product and the child membrane of accomplishing the manufacturing procedure of this production line then carry out the transport in opposite direction by conveying mechanism 5 of below, carry the product to the station of placing the product, make things convenient for the staff to get and put the piece at same station, improve work efficiency, reduce the place area occupied.

Referring to fig. 8, in order to improve the efficiency of the butt joint between the presser work groove 202 and the presser placing groove 302, a third driving device 701 is provided below the presser placing groove 302, the third driving device 7 is provided with a third driving member 702 capable of moving vertically, and the upper and lower presser placing grooves 302 on the same side are fixedly connected together through a connecting rod 305. The third driving device 701 includes any one of an air cylinder, a hydraulic cylinder, and a linear motor, the third driving device 701 of the present invention is preferably an air cylinder, and the third driving member 702 is specifically a piston rod.

A horizontal second connecting plate 703 is connected to the front end of the third driving device 701 through a flange, after the third driving device 702 penetrates through the second connecting plate 703, the tail end of the third driving device 702 is fixedly connected with the lower bottom surface of the lower-layer presser placing groove 302, two second guide pillars 704 which are vertically upward are fixedly arranged on the second connecting plate 703, the two second guide pillars 704 both penetrate through the upper and lower presser placing grooves 302 and play a guiding role, and the front and rear third driving devices 701 run synchronously. When the pressing tool working groove 202 is in butt joint with the pressing tool placing groove 302, the third driving device 701 can also adjust the height of the pressing tool placing groove 302, so that efficient butt joint of the pressing tool working groove 202 and the pressing tool placing groove 302 is realized.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a but welding set of automatic change tamp, includes frame (1) and fixed mounting elevating system (2) in frame (1), its characterized in that: the two lifting mechanisms (2) are arranged at intervals in the front-back direction, at least one side of the left side and the right side of each lifting mechanism (2) is provided with a pressing tool extending mechanism (3) at intervals, at least one group of three-coordinate module welding mechanisms (4) is arranged above each lifting mechanism, a conveying mechanism (5) is arranged below each lifting mechanism, each conveying mechanism (5) is provided with a jacking mechanism (8), a tire mold is placed on each conveying mechanism (5), and each jacking mechanism (8) is located below each tire mold; and the three-coordinate module welding mechanism (4), the conveying mechanism (5) and the pressing tool stretching mechanism (3) are fixedly arranged on the rack (1).

2. The welding device capable of automatically replacing the pressing tool as claimed in claim 1, wherein: the lifting mechanism (2) comprises a welding assembly and a portal frame (401), and the welding assembly is movably arranged on the portal frame (401); the welding assembly comprises a first support (402), a second support (403) and a third support (404), wherein the first support (402) is movably mounted on a guide rail of a portal frame (401), the second support (403) is movably mounted on the guide rail of the first support (402), the third support (404) is movably mounted on the guide rail of the second support (403), and the guide rails of the portal frame (401), the first support (402) and the second support (403) are in a spatial vertical relationship; the first support (402), the second support (403) and the third support (404) are driven by an electric screw rod mechanism to slide, and an ultrasonic welding head (405) is fixedly arranged on the third support (404).

3. The welding device capable of automatically replacing the pressing tool as claimed in claim 2, wherein: two sets of three-dimensional module welding mechanism (4) are arranged above the lifting mechanism (2), and two sets of welding assemblies are arranged on the portal frame (401) at intervals.

4. The welding device capable of automatically replacing the pressing tool as claimed in claim 1, wherein: two groups of conveying mechanisms (5) which are arranged at intervals up and down are arranged below the lifting mechanism (2); the conveying mechanism (5) comprises speed multiplying chains (501) which are arranged at intervals left and right, are connected through a transmission shaft and are driven by a servo motor; the jacking mechanism (8) is arranged on the conveying mechanism (5) on the upper layer and arranged between the speed doubling chains (501), and the left side and the right side of the tire mold are respectively placed on the speed doubling chains (501).

5. The welding device capable of automatically replacing the pressing tool as claimed in claim 1 or 4, wherein: the jacking mechanism (8) comprises a jacking plate (801) and a jacking cylinder (805), wherein the bottom of the jacking plate (801) is fixedly provided with a guide pillar (802) and a rotatable roller (803), and the jacking mechanism is embedded into the rack (1) in a lifting manner through the guide pillar (802); one side of the roller (803) is provided with a wedge block (804), the wedge block (804) is fixedly connected with a piston rod of a jacking cylinder (805), the inclined surface of the wedge block (804) faces the outer side rolling curved surface of the roller (803), the jacking cylinder (805) can drive the wedge block (804) to move towards the roller (803), and the tire mold is lifted to be separated from the conveying mechanism (5) by jacking a jacking plate (801).

6. The welding device capable of automatically replacing the pressing tool as claimed in claim 1, wherein: the pressing tool extending mechanism (3) comprises at least two horizontal supporting platforms and a first driving device (301), wherein the two horizontal supporting platforms are arranged at intervals up and down, the first driving device (301) is positioned above the supporting platforms, and the first driving device (301) is provided with a first driving piece (303) capable of horizontally moving left and right; the pressure tool (6) is placed on the bearing platform, and the pressure tool (6) is connected with the tail end of the first driving part (303) through a buckle structure.

7. The welding device capable of automatically replacing the pressing tool as claimed in claim 6, wherein: elevating system (2) are including holding down work groove (202) and second drive arrangement (201), two the notch in holding down work groove (202) sets up relatively, two the guiding direction in holding down work groove (202) all with the moving direction of first driving piece (303) is unanimous, two the interior bottom surface in holding down work groove (202) is located same horizontal plane, second drive arrangement (201) are equipped with second driving piece (205) that can vertical removal, the end of second driving piece (205) with the last fixed surface of holding down work groove (202) is connected.

8. The welding device capable of automatically replacing the pressing tool as claimed in claim 7, wherein: the bearing platform comprises two pressing tool placing grooves (302) which are arranged at intervals in the front and back direction, notches of the two pressing tool placing grooves (302) are arranged oppositely, the guiding directions of the two pressing tool placing grooves (302) are consistent with the moving direction of the first driving piece (303), and the inner bottom surfaces of the two pressing tool placing grooves (302) are located on the same horizontal plane.

9. The welding device capable of automatically replacing the pressing tool as claimed in claim 7, wherein: the upper surface of the presser working groove (202) is connected with at least one pressing device (204), a telescopic pressing rod is arranged on the pressing device (204), and the pressing rod penetrates through the top of the presser working groove (202) and extends into the presser working groove (202).

10. The welding device capable of automatically replacing the pressing tool as claimed in claim 8, wherein: the upper surfaces of the two presser placing grooves (302) are respectively and fixedly provided with a first inductive switch (304), and the upper surfaces of the two presser working grooves (202) are respectively and fixedly provided with at least one second inductive switch (203).