Self-centering welding auxiliary device based on transducer vibrator

Abstract

The auxiliary device serves an automatic welding process production line where a welding robot is located and comprises a fixing nut and a positioning disc, one side of the positioning disc is provided with an external thread characteristic body, and the upper end of the positioning disc is provided with an external conical surface characteristic body; meanwhile, 12 openings are formed in the outer conical surface feature body, and small step surface feature bodies are arranged on the inner sides of the openings; the fixing nut is arranged at the outer circle end of the positioning disc, an inner conical surface feature structure and an inner thread feature structure are arranged on the inner side of the fixing nut, the inner conical surface feature structure and the outer conical surface feature body extrude each other in the assembling process, and meanwhile the inner thread feature structure and the outer thread feature body of the positioning disc are connected in a screwed mode through threads. According to the self-centering welding auxiliary device, the problem that the oscillator out-of-round deformation datum is difficult to determine is solved, the self-centering effect is achieved, the welding precision is higher, and technical preparation is made for welding a large batch of oscillators through a welding robot subsequently.

Description

Technical Field

[0001] The invention relates to the technical field of automated welding tooling, in particular to a self-centering welding auxiliary device based on a transducer oscillator. Background Art

[0002] The welding surface of the welding part of a certain type of transducer vibrator on the production line is relatively narrow, and the weld is a circular weld. It is difficult to accurately control the trajectory of the weld by manual welding, which easily causes defects such as uneven welds and weld nodules. The welding robot can easily complete the welding task with its flexible joints and high-precision motion control. However, to realize welding on the welding robot, auxiliary devices are required to fix the vibrator and ensure that the center of the circular weld is on the rotation center of the welding robot's turntable.

[0003] After the vibrator is vulcanized, the outer diameter of the bottom sleeve will increase to varying degrees, and the bottom rubber is uneven, so it can only rely on the 1mm wide annular surface on the edge as a support surface. During assembly, due to the influence of the preload, the bottom outer diameter continues to increase, resulting in poor roundness at the bottom, and the outer diameter of this sleeve cannot be used as a reference for welding. After actual measurement, the outer diameter of the upper part of the large outer circle is almost unaffected, so it is urgent to design a solution that uses the 1mm annular ring at the bottom of the sleeve as the positioning surface, and the unaffected outer diameter of the upper end of the large outer circle as the centering clamping surface, and uses a self-centering elastic chuck to design a welding auxiliary device to achieve automatic welding on a welding robot. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a self-centering welding auxiliary device based on a transducer oscillator, the auxiliary device serves the automatic welding process production line where the welding robot is located, and includes a fixing nut and a positioning plate, one side of the positioning plate is provided with an external thread feature, and the upper end of the positioning plate is an external conical surface feature body, and at the same time, 12 openings are provided on the external conical surface feature body, and a small step surface feature body is provided on the inner side of the opening;

[0005] The fixing nut is arranged on the outer circular end of the positioning plate, and an inner conical surface feature structure and an inner thread feature structure are arranged on the inner side, wherein the inner conical surface feature structure and the outer conical surface feature body are squeezed against each other during the assembly process, and at the same time, the inner thread feature structure is also connected to the outer thread feature of the positioning plate by screwing.

[0006] In one embodiment of the present invention, the auxiliary device is placed on the rotating center disk of the welding robot after being assembled with the vibrator. At the same time, the coaxiality between the upper end of the maximum outer circle size of the positioning disk and the rotating center disk of the workbench needs to be corrected to be no more than 0.04mm.

[0007] In one embodiment of the present invention, the bottom end of the transducer vibrator is placed on a small step surface feature body, which serves to limit the degree of freedom in the height direction.

[0008] In one embodiment of the present invention, after the fixing nut is screwed together with the positioning plate through threads, the opening portion is squeezed and tightened toward the center, so that the vibrator is fixed and the freedom in the lateral, longitudinal and rotational directions is limited.

[0009] The above technical solution of the present invention has the following advantages over the prior art: the self-centering welding auxiliary device described in the present invention solves the problem that it is difficult to determine the benchmark of the vibrator's out-of-round deformation, and has a self-centering effect, which makes the welding accuracy higher and makes technical preparations for the subsequent use of welding robots to weld large quantities of vibrators. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0011] Figure 1 It is a schematic diagram of clamping of the self-centering welding auxiliary device based on the transducer vibrator of the present invention;

[0012] Figure 2 is a top view of the positioning plate of the present invention;

[0013] Figure 3 It is a cross-sectional view of the fixing nut of the present invention.

[0014] As shown in the figure, 1. vibrator; 2. fixing nut; 3. positioning plate. DETAILED DESCRIPTION

[0015] like Figure 1 and Figure 2 As shown, this embodiment provides a self-centering welding auxiliary device based on a transducer vibrator, the auxiliary device serves the vibrator 1 process production line of automatic welding where the welding robot is located, and includes a fixing nut 2 and a positioning plate 3. One side of the positioning plate 3 is provided with an external thread feature, and the upper end of the positioning plate 3 is an external conical surface feature body, and at the same time, 12 openings are provided on the external conical surface feature body, and a small step surface feature body is provided on the inner side of the opening;

[0016] Figure 3 As shown, the fixing nut 2 is arranged on the outer circular end of the positioning plate 3, and an inner conical surface feature structure and an inner thread feature structure are provided on the inner side, wherein the inner conical surface feature structure and the outer conical surface feature body are squeezed against each other during the assembly process, and at the same time, the inner thread feature structure is also connected to the outer thread feature of the positioning plate 3 by being screwed together.

[0017] The schematic diagram of vibrator 1 being clamped at the upper end of the welding robot is shown in Figure 1 As shown. Place the positioning plate 3 on the rotating plate of the welding robot, calibrate the upper end of the maximum outer circle size of the positioning plate 3 to be coaxial with the center of rotation of the worktable to no more than 0.04mm, and then clamp it with the three-jaw chuck on the rotating plate. Put the fixing nut 2 on the positioning plate 3, do not rotate the nut first, put the vibrator 1 into the inner cavity of the positioning plate 3 according to the clamping diagram, place the vibrator 1 on the limit step, and then tighten the fixing nut 2. After the inner conical surface of the fixing nut 2 contacts the outer conical surface of the positioning plate 3, the upper end of the positioning plate 3 is radially tightened synchronously toward the center, which plays a self-centering role and fixes the vibrator 1. Adjust the welding gun head, align the weld position, adjust the welding speed and welding parameters, and then implement welding. After one welding is completed, you only need to loosen the fixing nut 2, take out the vibrator 1, and then put in a new vibrator 1 for welding. In this way, there is no need to calibrate the fixture each time welding, and the welding efficiency is higher.

[0018] The self-centering welding auxiliary device described in this embodiment uses a clamp to clamp the area on the upper end that does not deform, which solves the problem that the out-of-round deformation benchmark of the vibrator 1 is difficult to determine. The self-centering effect of the clamp makes the welding accuracy higher, and makes technical preparations for the subsequent use of welding robots to weld large quantities of vibrators 1. Using a welding robot to weld the vibrator 1 can accurately control the welding trajectory, making the weld more uniform. Compared with manual welding, it greatly reduces the fluctuation of welding quality caused by human factors, improves the yield rate, and can also reduce labor costs. The welding process is carried out in a closed space, which also effectively avoids the harm of dangerous factors to the human body.

[0019] Obviously, the above embodiments are merely examples for clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the protection scope of the invention.

Claims

1. A self-centering welding auxiliary device based on a transducer vibrator, the auxiliary device serves the vibrator (1) process production line of automatic welding where a welding robot is located, characterized in that: It comprises a fixing nut (2) and a positioning plate (3), wherein one side of the positioning plate (3) is provided with an external thread feature, and the upper end of the positioning plate (3) is an external conical surface feature body, and 12 openings are provided on the external conical surface feature body, wherein the inner side of each opening is provided with a small step surface feature body; The fixing nut (2) is arranged on the outer circular end of the positioning plate (3), and is provided with an inner conical surface feature structure and an inner thread feature structure on the inner side, wherein the inner conical surface feature structure and the outer conical surface feature body are mutually squeezed during the assembly process, and the inner thread feature structure is also connected to the outer thread feature of the positioning plate (3) by screwing.

2. The self-centering welding auxiliary device according to claim 1, characterized in that: After the auxiliary device is assembled with the vibrator (1), it is placed on the rotating center disk of the welding robot. At the same time, the coaxiality between the upper end of the maximum outer circle size of the positioning disk (3) and the rotating center disk of the workbench needs to be corrected to be no greater than 0.04 mm.

3. The self-centering welding auxiliary device according to claim 1, characterized in that: The bottom end of the transducer vibrator (1) is placed on a small step surface feature body, which serves to limit the degree of freedom in the height direction.

4. The self-centering welding auxiliary device according to claim 1, characterized in that: After the fixing nut (2) is screwed together with the positioning plate (3) through threads, the opening portion is squeezed and tightened toward the center, so that the vibrator (1) is fixed, which plays a role in limiting the freedom in the horizontal, longitudinal and rotational directions.

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