Lower electrode telescoping mechanism for projection welding machine

Abstract

The utility model relates to the technical field of projection welding machines, in particular to a lower electrode telescopic mechanism for a projection welding machine, which comprises a lower electrode end cover lock sleeve, an air pipe fixed connecting block, a lower electrode rod, a connecting rod assembly and a telescopic cylinder, the motor end cover lock sleeve is connected to the top end of the lower electrode rod, and the air pipe fixed connecting block is fixed on the lower electrode rod; the lower electrode rod is of a barrel structure, the connecting rod assembly is slidably connected into the lower electrode rod in a sleeved mode from the bottom end of the lower electrode rod, the connecting rod assembly comprises a guide sleeve, a connecting rod and a guide rod, the guide sleeve is connected to the top end of the connecting rod, the top end of the guide rod is fixedly connected to the bottom end of the connecting rod, and the bottom end of the guide rod is connected with a telescopic air cylinder. When the lower electrode telescoping mechanism is used for projection welding, the function that the guide sleeve accurately stretches and retracts back and forth can be achieved, so that a mechanical arm can directly take workpieces from a projection welding machine conveniently, and in addition, the lower electrode telescoping mechanism further has the effect of effectively preventing welding spatter accumulation.

Description

Technical Field

[0001] The utility model relates to the technical field of projection welding machines, in particular to a lower electrode telescopic mechanism for projection welding machines. Background Art

[0002] In the field of projection welding automation for automotive parts, in the past, sheet metal parts and nuts / bolts were manually placed on the projection welding machine for operation, and the overall process was prone to defects caused by human factors. In turn, projection welding automation technology can reduce human quality risks and improve work efficiency. However, fixed guide sleeves are used in projection welding automation technology. As the electrode end surface is increasingly ground, the displacement of the robot arm changes when picking up the parts, which can easily cause the guide sleeve to be torn off when picking up the parts, resulting in more cost waste.

[0003] Therefore, an important part of projection welding automation is to design a lower electrode mechanism that can realize the telescopic function to ensure the repeat positioning accuracy of the guide sleeve and prevent the accumulation of welding spatter. Therefore, how to design a lower electrode telescopic mechanism for projection welding machine that can ensure the repeat positioning accuracy of the guide sleeve and prevent the accumulation of welding spatter has become a research direction for technicians in this field. Utility Model Content

[0004] In view of the above-mentioned problems, the utility model provides a lower electrode telescopic structure for a projection welding machine to solve the problem that the repeatable positioning accuracy of the guide sleeve in the projection welding automation link in the prior art cannot be guaranteed.

[0005] The utility model solves the above technical problems through the following technical solutions:

[0006] A lower electrode telescopic mechanism for a projection welding machine, comprising a lower electrode end cover locking sleeve, an air pipe fixed connection block, a lower electrode rod, a connecting rod assembly and a telescopic cylinder;

[0007] The lower motor end cover locking sleeve is connected to the top end of the lower electrode rod, and the air pipe fixed connection block is fixed on the lower electrode rod;

[0008] The lower electrode rod is a cylindrical structure, the connecting rod assembly is slidably sleeved in the lower electrode rod from the bottom end of the lower electrode rod, and the connecting rod assembly includes a guide sleeve, a connecting rod and a guide rod, the guide sleeve is connected to the top end of the connecting rod, the top end of the guide rod is fixedly connected to the bottom end of the connecting rod, and the bottom end of the guide rod is connected to the telescopic cylinder.

[0009] In some of the embodiments, the lower electrode telescopic mechanism further includes a first connecting plate, a second connecting plate and a third connecting plate;

[0010] The third connecting plate is fixedly installed on the lower part of the lower electrode rod through a fixed mounting block, and the telescopic cylinder is fixed on the third connecting plate through the second connecting plate and the third connecting plate.

[0011] In some embodiments, a light source sensing metal block is provided at the bottom of the telescopic cylinder, a laser sensor is provided on the third connecting plate, and the laser sensor is arranged below the telescopic cylinder.

[0012] In some embodiments, a bushing is provided on the connecting rod.

[0013] In some embodiments, the bushing is a rolling bearing.

[0014] In some embodiments, the lower motor end cap lock sleeve is threadedly connected to the top end of the lower electrode rod.

[0015] In some embodiments, the bottom end of the guide rod is threadedly connected to the telescopic rod of the telescopic cylinder, and the side wall of the tail end of the guide rod has a notch.

[0016] In some embodiments, the bottom end of the connecting rod is threadedly connected to the top end of the guide rod.

[0017] In some embodiments, holes are formed around the guide sleeve.

[0018] In some embodiments, an external air pipe is connected to the air pipe fixing connection block, and the external air pipe is communicated with the inner cavity of the lower electrode rod.

[0019] The above-mentioned utility model has at least one of the following advantages or beneficial effects:

[0020] The present utility model provides a lower electrode telescopic mechanism for a projection welder. During projection welding, the lower electrode telescopic mechanism can realize the function of accurately telescoping the guide sleeve back and forth, thereby facilitating the manipulator to directly pick up parts from the projection welder. In addition, the lower electrode telescopic mechanism also has the effect of effectively preventing the accumulation of welding spatter. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] By reading the detailed description of the non-limiting embodiments with reference to the following drawings, the present utility model and its features, shape, and advantages will become more obvious. The same reference numerals indicate the same parts in all the drawings. The drawings are not drawn to scale, and the emphasis is on showing the gist of the present utility model.

[0022] Figure 1 is a schematic structural diagram of a lower electrode telescopic mechanism for a projection welder in an embodiment of the present utility model;

[0023] Figure 2It is a schematic structural diagram of the connecting rod assembly in the embodiment of the present utility model;

[0024] Figure 3 It is an application schematic diagram of the lower electrode telescopic mechanism for a projection welder in the embodiment of the present utility model;

[0025] In the figure: 1. Lower electrode end cover lock sleeve; 2. Air pipe fixed connection block; 3. Lower electrode rod; 4. Fixed installation block; 5. Connecting rod assembly; 501. Guide sleeve; 502. Bush; 503. Connecting rod; 504. Guide rod; 6. First connecting plate; 7. Telescopic cylinder; 8. Second connecting plate; 9. Light source sensing metal block; 10. Third connecting plate; 11. Laser sensor; 12. Fourth connecting plate; 1-1. Lower electrode telescopic structure; 1-2. Projection welder body; 1-3. Projection welder electrical cabinet. Specific implementation mode

[0026] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments, but it is not a limitation of the present utility model.

[0027] As Figures 1 to 3 shown, the present utility model discloses a lower electrode telescopic mechanism for a projection welder. Specifically, the lower electrode telescopic mechanism includes a lower electrode end cover lock sleeve 1, an air pipe fixed connection block 2, a lower electrode rod 3, a connecting rod assembly 5 and a telescopic cylinder 7; the lower electrode end cover lock sleeve 1 is threadedly locked and connected to the top end of the lower electrode rod 3, and the air pipe fixed connection block 2 is fixed on the lower electrode rod 3 for fixing the lower electrode telescopic mechanism on the lower electrode seat of the projection welder body 1-2. An external air pipe is connected to the air pipe fixed connection block 2, and the external air pipe is communicated with the inner cavity of the lower electrode rod 3 to realize blowing air into the lower electrode rod 3 through the external air pipe; the electrode rod is of a cylindrical structure, and the connecting rod assembly 5 is slidably sleeved in the lower electrode rod 3 from the bottom end of the lower electrode rod 3. The connecting rod assembly 5 includes a guide sleeve 501, a connecting rod 503 and a guide rod 504. The guide sleeve 501 is connected to the top end of the connecting rod 503 for positioning the bolt to be welded. The top end of the guide rod 504 is fixedly connected to the bottom end of the connecting rod 503, and the bottom end of the guide rod 504 is connected to the telescopic cylinder 7, and the telescopic cylinder 7 drives the connecting rod assembly 5 to move vertically back and forth.

[0028] In an embodiment of the present utility model, the lower electrode telescoping mechanism further includes a first connecting plate 6, a second connecting plate 8, and a third connecting plate 10; the third connecting plate 10 is fixedly installed at the lower part of the lower electrode rod 3 through a fixed mounting block 4, and the telescoping cylinder 7 is fixed on the third connecting plate 10 through the second connecting plate 8 and the third connecting plate 10; a light source sensing metal block 9 is provided at the bottom of the telescoping cylinder 7, and a laser sensor 11 is installed on the third connecting plate 10, and the laser sensor 11 is arranged below the telescoping cylinder 7, and the laser sensor 11 and the light source sensing metal block 9 cooperate to effectively detect the displacement magnitude of the telescoping cylinder 7.

[0029] In an embodiment of the present utility model, the above-mentioned guide rod 504 is integrally processed, and the top end of the guide rod 504 is threadedly connected to the bottom end of the connecting rod 503, so as to relieve the stress between the guide rod 504 and the connecting rod 503. The bottom end of the guide rod 504 is also a threaded structure with holes. The bottom end of the guide rod 504 is threadedly connected to the telescopic rod of the telescoping cylinder 7, and a notch is designed on the side wall of the tail end of the guide rod 504, and the notch facilitates mechanical disassembly.

[0030] In an embodiment of the present utility model, a bushing 502 is provided on the above-mentioned connecting rod 503, and the bushing 502 is a linear bearing, so that the connecting rod 503 can move linearly in the lower electrode rod 3.

[0031] In an embodiment of the present utility model, holes are provided around the above-mentioned guide sleeve 501 to facilitate the outflow of welding spatter. The bottom end of the guide sleeve 501 is fixedly connected with a nut, and the guide sleeve 501 is fixed on the connecting rod 503 by tightening the nut. The guide sleeve 501 is used to position the bolt to be welded.

[0032] In an embodiment of the present utility model, as Figure 3 shown, the above-mentioned lower electrode telescoping structure 1-1 is fixed on the lower electrode seat of the projection welder body 1-2 (specifically, the lower electrode telescoping structure 1-1 is fixed on the lower electrode seat of the projection welder body 1-2 through an air pipe fixing block 2); the projection welder electric cabinet 1-3 provides electric energy and a control system for the lower electrode telescoping structure 1-1.

[0033] Those skilled in the art should understand that those skilled in the art can achieve variations in combination with the prior art and the above embodiments, which will not be elaborated here. Such variations do not affect the essence of the present utility model and will not be elaborated here.

[0034] The preferred embodiments of the present utility model have been described above. It should be understood that the present utility model is not limited to the above specific embodiments, and the devices and structures not described in detail therein should be understood to be implemented in a common manner in the art; any person skilled in the art can, without departing from the scope of the technical solution of the present utility model, make many possible changes and modifications to the technical solution of the present utility model by using the methods and technical contents disclosed above, or modify it into an equivalent embodiment with equivalent changes, which does not affect the essence of the present utility model. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model without departing from the content of the technical solution of the present utility model still fall within the scope of protection of the technical solution of the present utility model.

Claims

1. An under-electrode telescopic mechanism for a projection welder, characterized in that, It includes a lower electrode end cap lock sleeve, an air pipe fixed connection block, a lower electrode rod, a connecting rod assembly, and a telescopic cylinder; The lower electrode end cap lock sleeve is connected to the top end of the lower electrode rod, and the air pipe fixed connection block is fixed on the lower electrode rod; The lower electrode rod is of a cylindrical structure. The connecting rod assembly is slidably sleeved inside the lower electrode rod from the bottom end of the lower electrode rod. The connecting rod assembly includes a guide sleeve, a connecting rod, and a guide rod. The guide sleeve is connected to the top end of the connecting rod. The top end of the guide rod is fixedly connected to the bottom end of the connecting rod, and the bottom end of the guide rod is connected to the telescopic cylinder.

2. The lower electrode telescopic mechanism for a projection welder according to claim 1, characterized in that, The lower electrode telescopic mechanism further includes a first connecting plate, a second connecting plate, and a third connecting plate; The third connecting plate is fixed to the lower part of the lower electrode rod through a fixed mounting block, and the telescopic cylinder is fixed to the third connecting plate through the second connecting plate and the third connecting plate.

3. The lower electrode telescopic mechanism for a projection welder according to claim 2, characterized in that A metal block for sensing a light source is arranged at the bottom of the telescopic cylinder, and a laser sensor is arranged on the third connecting plate and is arranged below the telescopic cylinder.

4. The lower electrode telescopic mechanism for a projection welder according to claim 1, characterized in that, A bushing is arranged on the connecting rod.

5. The lower electrode telescopic mechanism for a projection welder according to claim 4, wherein, The bushing is a linear bearing.

6. The lower electrode telescopic mechanism for a projection welder according to claim 1, wherein The lower electrode end cap lock sleeve is threadedly connected to the top end of the lower electrode rod.

7. The lower electrode telescopic mechanism for a projection welder according to claim 1, characterized in that, The bottom end of the guide rod is threadedly connected to the telescopic rod of the telescopic cylinder, and a notch is provided on the side wall of the bottom of the guide rod.

8. The lower electrode telescopic mechanism for a projection welder according to claim 1, wherein, The bottom end of the connecting rod is threadedly connected to the top end of the guide rod.

9. The lower electrode telescopic mechanism for a projection welder according to claim 1, characterized in that, Holes are formed around the guide sleeve.

10. The lower electrode telescopic mechanism for a projection welder according to claim 1, characterized in that, An external air pipe is connected to the air pipe fixed connection block, and the external air pipe is communicated with the inner cavity of the lower electrode rod.

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