Double-groove pressure applying type ultrasonic rapid forming and seam rolling welding symmetrical pressure head mechanism

Abstract

The utility model discloses a double-groove pressing type ultrasonic rapid forming and seam rolling welding symmetrical pressure head mechanism which comprises an ultrasonic assembly and a base plate, the middle position of the ultrasonic assembly is fixed to the base plate through a sliding bearing seat, and the two ends of the ultrasonic assembly are connected with the base plate through floating bearing structures. Diaphragm bearing structures are arranged on the portions, corresponding to the opposite sides of the two floating bearing structures, of the ultrasonic assembly, the ultrasonic assembly comprises a balance weight amplitude-change pole, an integrated welding head and an ultrasonic transducer, the balance weight amplitude-change pole and the ultrasonic transducer are arranged in an axial symmetry mode, and the integrated welding head is arranged in the middle of the ultrasonic assembly. According to the utility model, the length of the whole ultrasonic roll welding or seam welding pressure head group is shortened, and the floating type structural design is adopted to ensure that the seam welding or roll welding operation can still be carried out in the process with positive pressure, so that the structural fracture caused by concentration of ultrasonic energy in the welding process is effectively avoided, and the universality of equipment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ultrasonic welding, in particular to a double-groove pressure-applying ultrasonic rapid forming and rolling seam welding symmetrical pressure head mechanism. Background Art

[0002] Ultrasonic welding is a process in which an ultrasonic generator converts a 50 / 60 Hz current into 15, 20, 30 or 40KHz electrical energy. The converted high-frequency electrical energy is converted again into mechanical motion of the same frequency by a transducer, and then the mechanical motion is transmitted to the welding head through a set of amplitude-changing rod devices that can change the amplitude. The welding head transmits the received vibration energy to the joint of the workpiece to be welded. In this area, the vibration energy is converted into heat energy by friction, instantly consolidating the metal foil strips together. Ultrasonic waves can not only be used to weld metals, but also harden thermoplastics and process fabrics and films.

[0003] The rapid prototyping pressure head of the ultrasonic roll welding or seam welding in the prior art still has many shortcomings. For example, the horn device of the ultrasonic component has a long structure, which leads to a long length of the entire double-slot pressure-applying ultrasonic rapid prototyping and roll seam welding symmetrical pressure head mechanism, making it inconvenient to install. Secondly, the structure of the ultrasonic welding head for roll welding or seam welding is single. Since the roll welding head cannot apply greater pressure like a flat welding head, the use scenarios of the ultrasonic welding head for roll welding or seam welding are extremely limited. It can only be used for welding between ultra-thin metal layers or for welding soft materials such as plastic fabric films, which hinders the development of ultrasonic technology in the metal industry. Utility Model Content

[0004] In order to overcome the above problems existing in the prior art, the utility model proposes a double-groove pressure-applying ultrasonic rapid forming and rolling seam welding symmetrical pressure head mechanism.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a double-slot pressure-applying ultrasonic rapid prototyping and rolling seam welding symmetrical pressure head mechanism, comprising an ultrasonic component and a base plate, wherein the middle position of the ultrasonic component is fixed to the base plate by a sliding bearing seat, and the two ends of the ultrasonic component are connected to the base plate by a floating bearing structure, and a diaphragm bearing structure is arranged on the ultrasonic components corresponding to the opposite sides of the two floating bearing structures, and the ultrasonic component comprises a counterweight amplitude rod, an integrated welding head, and an ultrasonic transducer, wherein the counterweight amplitude rod and the ultrasonic transducer are axially symmetrically arranged, the integrated welding head is arranged in the middle position of the ultrasonic component, and the ultrasonic transducer is connected to an ultrasonic generator.

[0006] The above-mentioned double-groove pressure-type ultrasonic rapid prototyping and rolling seam welding symmetrical pressure head mechanism, the floating bearing structure includes an upper floating bearing structure, a lower floating bearing structure, a floating spring, a ball bearing, and a bearing retaining ring. The upper floating bearing structure is fixed on a base plate, and a floating spring is arranged at a fixed position. The lower floating bearing structure cooperates with the upper floating bearing structure to embed the ultrasonic component into the floating bearing structure. An assembly space is arranged in the middle position of the floating bearing structure for installing a ball bearing and a bearing retaining ring.

[0007] The above-mentioned double-groove pressure-type ultrasonic rapid forming and rolling seam welding symmetrical pressure head mechanism, the diaphragm bearing structure includes a bearing ring, a diaphragm spring, and a diaphragm spring retaining ring. One side of the bearing ring is connected to the bearing retaining ring and the ball bearing, and the other side is embedded with the diaphragm spring and the diaphragm spring retaining ring in sequence.

[0008] The above-mentioned double-slot pressure-type ultrasonic rapid prototyping and rolling seam welding symmetrical pressure head mechanism, the integrated welding head includes a welding head and an amplitude-changing structure, two amplitude-changing structures are provided, and the two amplitude-changing structures are symmetrically installed on both sides of the welding head.

[0009] The above-mentioned double-groove pressure-applying ultrasonic rapid prototyping and rolling seam welding symmetrical pressure head mechanism has a surface roughness Ra of 56 μm and a surface roughness Rz of 88 μm.

[0010] The above-mentioned double-groove pressure-type ultrasonic rapid prototyping and rolling seam welding symmetrical pressure head mechanism, the sliding bearing seat is provided with a sliding bearing with Teflon inside, the sliding bearing seat is provided with two, and the two sliding bearing seats are respectively installed between the two variable amplitude structures and the welding head.

[0011] The beneficial effects of the utility model are as follows: the ultrasonic component of the utility model simplifies the lengthy amplitude rod structure, combines the amplitude rod structure with the welding head into one, and shortens the length of the entire double-slot pressure-type ultrasonic rapid prototyping and roll seam welding symmetrical pressure head mechanism; by providing a floating structure, the rotation of the ball bearing can still be maintained under the huge downward force during the welding process, and thus the entire ultrasonic component can be roll welded or seam welded at the welding position without resistance, and the design of the diaphragm spring and the floating spring also effectively avoids the rupture of the overall structure due to the concentration of ultrasonic energy during the welding process; by providing a sliding bearing seat (equipped with a sliding bearing), the rolling with ultra-small friction and ultra-low wear can be maintained during the period of high ultrasonic vibration, and at the same time, its symmetrical structural design can evenly distribute the force to the entire ultrasonic component to ensure the uniformity of the downward pressure; by providing a base plate, the entire double-slot pressure-type ultrasonic rapid prototyping and roll seam welding symmetrical pressure head mechanism can be integrated into any equipment, such as a multi-axis robot arm, a CNC milling machine, a machining center, etc., thereby improving the versatility of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0013] Figure 1 It is a three-dimensional structural diagram of the double-groove pressure-applying ultrasonic rapid forming and rolling seam welding symmetrical pressure head mechanism of the utility model;

[0014] Figure 2 It is a front view of the double-groove pressure-applying ultrasonic rapid forming and rolling seam welding symmetrical pressure head mechanism of the utility model;

[0015] Figure 3 It is a schematic diagram of the ultrasonic components in the double-groove pressure-type ultrasonic rapid prototyping and roll seam welding symmetrical pressure head mechanism of the utility model;

[0016] Figure 4 It is a schematic diagram of the force of the ultrasonic component in the double-groove pressure-type ultrasonic rapid prototyping and roll seam welding symmetrical pressure head mechanism of the utility model;

[0017] Figure 5 It is a schematic diagram of the welding head in the symmetrical pressure head mechanism of the double-groove pressure-applying ultrasonic rapid forming and rolling seam welding of the utility model;

[0018] Figure 6 It is a schematic diagram of the decomposition of the floating bearing structure and the diaphragm bearing structure in the double-groove pressure-type ultrasonic rapid forming and rolling seam welding symmetrical pressure head mechanism of the utility model.

[0019] In the figure, 1. counterweight amplitude change rod, 2. floating bearing structure, 201. upper floating bearing structure, 202. floating spring, 203. lower floating bearing structure, 204. ball bearing, 205. bearing retaining ring, 3. diaphragm bearing structure, 303. bearing ring, 304. diaphragm spring, 305. diaphragm spring retaining ring, 4. sliding bearing seat, 5. base plate, 6. integrated welding head, 61. first amplitude change structure, 62. welding head, 63. second amplitude change structure. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0021] like Figure 1-2 As shown, this embodiment discloses a double-groove pressure-type ultrasonic rapid prototyping and rolling seam welding symmetrical pressure head mechanism, including an ultrasonic component and a base plate 5. The middle position of the ultrasonic component is fixed to the base plate 5 through a sliding bearing seat 4. Two sliding bearing seats are provided. A fixed seat is provided on the base plate. The two sliding bearing seats are respectively located in the positions of the fixed seats to fix the entire ultrasonic system frame. The base plate is also used to integrate the entire ultrasonic rapid prototyping pressure head into any equipment, such as a machining center, a CNC milling machine, and a multi-axis robot, etc.

[0022] The two ends of the ultrasonic assembly are connected to the base plate 5 through the floating bearing structure 2. The diaphragm bearing structure 3 is arranged on the ultrasonic assembly corresponding to the opposite sides of the two floating bearing structures. Figure 3 As shown, the ultrasonic assembly includes a counterweight horn 1, an integrated welding head 6, and an ultrasonic transducer 7. The counterweight horn 1 and the ultrasonic transducer 7 are axially symmetrically arranged. The counterweight horn plays a role in balancing the weight on both sides, and evenly and effectively transmits ultrasonic energy to the welding head. The frequency of the ultrasonic transducer ranges from 20K to 30K. According to the actual use situation, ultrasonic transducers of different frequencies are switched to apply ultrasonic waves to the welding head. The integrated welding head 6 is arranged in the middle position of the ultrasonic assembly.

[0023] like Figure 5 As shown, the integrated welding head 6 includes a welding head 62, a first amplitude-changing structure 61, and a second amplitude-changing structure 63. The first amplitude-changing structure 61 and the second amplitude-changing structure 63 are symmetrically installed on both sides of the welding head 62. The shapes of the first amplitude-changing structure 61 and the second amplitude-changing structure 63 are manufactured through simulation design. Since the ultrasonic wave has a certain wavelength and the energy is the highest at the wave crest, the design of the amplitude-changing structure should ensure that the ultrasonic wave transmitted to the welding point should be at the top of the wave crest and should be near the zero point at the clamping position of the sliding bearing group. The ultrasonic energy here is the lowest to ensure the service life of the ultrasonic welding head. Therefore, the integrated welding head structure is designed as shown in FIG. Figure 5 As shown. The variable amplitude structure can amplify the particle displacement and velocity of the mechanical vibration transmitted by the ultrasonic transducer, so as to increase the amplitude at the welding position and improve the quality of the product after welding. The surface of the welding head has a certain degree of roughness, Ra is 56μm, Rz is 88μm. The surface of the welding head can be treated by wire cutting spark or surfacing.

[0024] The sliding bearing seat is equipped with a sliding bearing with Teflon, which can ensure that the ultrasonic component can maintain ultra-low friction and ultra-low wear during the high vibration of the ultrasonic wave. At the same time, its symmetrical structural design can evenly distribute the force to the entire ultrasonic component to ensure the uniformity of the downward pressure.

[0025] like Figure 6As shown, the floating bearing structure includes a floating bearing structure upper 201, a floating bearing structure lower 203, a floating spring 202, a ball bearing 204, and a bearing retaining ring 205. A through hole is provided in the middle of the floating bearing structure for installing the ball bearing and the bearing retaining ring. The ball bearing 204 allows the ultrasonic device to continue to maintain continuous rolling welding operation under the application of force. The floating bearing structure upper 201 is first fixed on the substrate, and then the ultrasonic component is embedded. The floating bearing structure lower 203 confines the entire ultrasonic device therein. The floating spring 202 is made of TiNi memory alloy. Since the entire device needs to use a huge downward force during the welding process, the floating spring 202 can still keep the ball bearing 204 rotating under the force, and also to ensure that the entire structure will not be broken due to the huge energy of the ultrasound during the ultrasonic welding process.

[0026] The diaphragm bearing structure includes a bearing ring 303, a diaphragm spring 304, and a diaphragm spring retaining ring 305. One side of the bearing ring 303 is connected to the bearing retaining ring 205 and the ball bearing 204, and the other side is provided with a threaded hole and a position for embedding the diaphragm spring 304. 305 is a diaphragm spring retaining ring.

[0027] When the double-groove pressure-type ultrasonic rapid prototyping and rolling seam welding symmetrical pressure head mechanism disclosed in this embodiment is used, the entire forming pressure head is first integrated into the welding equipment through the substrate, and the welding equipment applies force to the double-groove pressure-type ultrasonic rapid prototyping and rolling seam welding symmetrical pressure head mechanism, such as Figure 6 As shown, the welding head is pressed to the position of the workpiece to be welded, and at the same time, the ultrasonic transducer generates ultrasonic waves and transmits them to the welding head position, and the welding operation is completed by using the energy generated by the high-frequency vibration of the ultrasonic waves and the friction force generated by the surface roughness.

[0028] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A double-groove pressure-type ultrasonic rapid prototyping and rolling seam welding symmetrical pressure head mechanism, characterized in that: It includes an ultrasonic component and a base plate. The middle position of the ultrasonic component is fixed to the base plate by a sliding bearing seat. Both ends of the ultrasonic component are connected to the base plate by a floating bearing structure. A diaphragm bearing structure is arranged on the ultrasonic component corresponding to the opposite sides of the two floating bearing structures. The ultrasonic component includes a counterweight amplitude rod, an integrated welding head, and an ultrasonic transducer. The counterweight amplitude rod is symmetrically arranged with respect to the ultrasonic transducer axis. The integrated welding head is arranged in the middle position of the ultrasonic component. The ultrasonic transducer is connected to an ultrasonic generator.

2. A double-groove pressure-applying ultrasonic rapid prototyping and roll seam welding symmetrical pressure head mechanism according to claim 1, characterized in that: The floating bearing structure includes an upper floating bearing structure, a lower floating bearing structure, a floating spring, a ball bearing, and a bearing retaining ring. The upper floating bearing structure is fixed on a base plate, and a floating spring is arranged at a fixed position. The lower floating bearing structure cooperates with the upper floating bearing structure to embed the ultrasonic component into the floating bearing structure. A through hole is arranged in the middle position of the floating bearing structure for installing a ball bearing and a bearing retaining ring.

3. A double-groove pressure-applying ultrasonic rapid prototyping and roll seam welding symmetrical pressure head mechanism according to claim 2, characterized in that: The diaphragm bearing structure comprises a bearing ring, a diaphragm spring and a diaphragm spring retaining ring. One side of the bearing ring is sleeved with the bearing retaining ring and the ball bearing, and the other side is embedded with the diaphragm spring and the diaphragm spring retaining ring in sequence.

4. A double-groove pressure-applying ultrasonic rapid prototyping and roll seam welding symmetrical pressure head mechanism according to claim 1, characterized in that: The integrated welding head comprises a welding head and an amplitude-changing structure. Two amplitude-changing structures are provided and the two amplitude-changing structures are symmetrically installed on both sides of the welding head.

5. A double-groove pressure-applying ultrasonic rapid prototyping and roll seam welding symmetrical pressure head mechanism according to claim 4, characterized in that: The surface roughness Ra of the welding head is 56 μm, and Rz is 88 μm.

6. A double-groove pressure-applying ultrasonic rapid prototyping and roll seam welding symmetrical pressure head mechanism according to claim 4, characterized in that: A sliding bearing with Teflon is arranged inside the sliding bearing seat, and two sliding bearing seats are provided. The two sliding bearing seats are respectively installed between the two amplitude-changing structures and the welding head.

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