Electrically conductive tip device with ceramic-silver composite lining and welding torch

Abstract

This utility model discloses a conductive nozzle device and welding torch with a ceramic-silver composite material liner. The conductive nozzle device uses a ceramic-silver composite material as the liner block, combining the wear resistance of ceramic materials with the high conductivity of the silver plating, which can greatly extend the service life of the conductive nozzle device and improve welding quality. The liner block is detachable, making manufacturing and subsequent maintenance very convenient and quick. Both ends of the liner block are fixed by slots and frustum sections, respectively, achieving a fixing effect similar to welding. The slots can position the liner block for quick and uniform installation in the circumferential direction of the support component. Compared with the existing technology that uses a positioning mold to position the liner block before welding, this method is undoubtedly faster, lower in cost, and more economical for subsequent maintenance. The addition of liquid cooling in this utility model can dissipate heat, preventing the conductive nozzle device from overheating, thereby ensuring stable operation over a long period and guaranteeing welding quality.

Description

Technical Field

[0001] This utility model relates to welding equipment and conductive nozzle technology, and in particular to a conductive nozzle device and welding torch with a ceramic-silver composite material liner. Background Technology

[0002] Ceramic-silver composite materials are produced through a special material ratio and processing technology, creating a gradient distribution structure of ceramics and silver within the conductive nozzle. This structure utilizes the high-temperature resistance and wear resistance of ceramics while leveraging the excellent conductivity of silver, thus optimizing the overall performance of the conductive nozzle. Currently, the application of this ceramic-silver composite material in conductive nozzles mainly involves using a ceramic-silver composite sheet as an inner liner, which is then pressed and fixed within a chromium-zirconium-copper matrix. This method has a complex processing technology and relatively high costs. Furthermore, it requires periodic disassembly and inspection of the plating thickness (generally around 200 hours of operation). If the thickness is less than 1μm, the nozzle needs to be returned to the factory for repair, resulting in long maintenance costs and a long maintenance cycle.

[0003] Therefore, how to quickly integrate ceramic-silver composite materials with conductive nozzles while facilitating subsequent maintenance and reducing production and usage costs is a technical problem that needs to be solved. Utility Model Content

[0004] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide a conductive nozzle device and welding torch with a ceramic-silver composite material liner, wherein the conductive nozzle device has low production and use costs and has a ceramic-silver composite material liner.

[0005] To achieve the above objectives, this utility model provides a conductive nozzle device with a ceramic-silver composite material liner, including a support member and a liner block. The support member is provided with a support sleeve and a slot. At least two pairs of support bars are provided on the inner side of the support sleeve, and an expansion gap is formed between the two pairs of adjacent support bars. The support bars are arranged along the axial direction of the support sleeve.

[0006] Support bars are installed on both sides of the slot, and the two support bars on both sides of the same slot are a pair; there are at least two slots and two adjacent slots are separated by a connecting part;

[0007] The inner liner block is provided with a plug-in end and support side grooves on both sides. The support side grooves are engaged with the corresponding support bars. The plug-in end is inserted into the slot. The welding wire passes through the support and the inner liner block, and the welding wire is in contact with the inner liner block to conduct electricity.

[0008] As a further improvement of this utility model, the inner liner block is made of ceramic-silver composite material, which has a silver film plated on the surface of alumina ceramic, and the thickness of the silver film is not less than 1μm.

[0009] As a further improvement of this utility model, the side of the support bar does not enter the circle formed by the inner arc surface of the inner liner block, and the inner arc surface of the inner liner block is in contact with the welding wire and conducts electricity.

[0010] As a further improvement of this utility model, it also includes a connecting seat, which is fixed on the welding gun. The connecting seat is also provided with a connecting seat hole and a connecting screw hole. The support member is provided with a support stud, which is inserted into and assembled with the connecting screw hole.

[0011] As a further improvement of this utility model, the slot is filled with conductive paste, which bonds the inner wall of the slot to the insertion end and conducts electricity; the expansion gap is filled with conductive paste.

[0012] As a further improvement of this utility model, a connecting sleeve is fitted outside the support sleeve, the connecting sleeve is installed outside the support sleeve and on the support member, and the end cap is installed on the connecting sleeve.

[0013] As a further improvement of this utility model, the inner liner block is provided with a conical hole surface, and the end cap is also provided with an inner end face and a frustum portion. The end cap is fitted over the support sleeve and its inner wall is in contact with the outer wall of the support sleeve. The inner end face is located on the end face of the end cap that connects with the frustum portion. The frustum portion is provided with a frustum surface. The inner end face is in contact with the end face of the support sleeve, and the frustum surface is in contact with the conical hole surface.

[0014] As a further improvement of this utility model, a cooling ring groove is provided on the outer wall of the connecting sleeve, a cooling ring is installed in the cooling ring groove, a cooling channel is provided inside the cooling ring, and the two ends of the cooling channel are respectively connected to the first pipe head and the second pipe head. The first pipe head and the second pipe head are both installed on the cooling ring, and the first pipe head and the second pipe head are respectively connected to the input end and the output end of the liquid cooling circulation system.

[0015] As a further improvement of this utility model, the cooling ring is a semi-ring, and there are two of them. Both cooling rings are fitted and fixed on the cooling ring groove, and the cooling ring is provided with a clamp groove, and a clamp is tightly fitted in the clamp groove; the cooling channels of the two cooling rings are sealed and connected, and the cooling ring and clamp are made of insulating material.

[0016] This utility model also discloses a welding torch that includes the aforementioned conductive nozzle device.

[0017] The beneficial effects of this utility model are:

[0018] This invention uses a ceramic-silver composite material as the inner liner, combining the wear resistance of ceramic materials with the high conductivity of silver plating. This significantly extends the service life of the conductive nozzle device and improves welding quality. The inner liner is also detachable, making manufacturing and subsequent maintenance very convenient and quick, greatly reducing manufacturing costs. Both ends of the inner liner are fixed via slots and frustum sections, achieving a similar fixing effect to welding. The slots position the inner liner for quick and even installation along the circumference of the support component. Compared to existing technologies that use positioning molds to position the inner liner before welding, this method is undoubtedly faster, lower in cost, and more economical for subsequent maintenance.

[0019] The addition of liquid cooling in this invention enables heat dissipation, preventing overheating of the conductive nozzle and ensuring stable operation over extended periods while maintaining welding quality. This design is particularly suitable for automated welding equipment. Combined with the long lifespan of the inner liner, it reduces downtime, shortens maintenance time, lowers maintenance costs, and still ensures welding quality. Attached Figure Description

[0020] Figure 1 This is a structural schematic diagram of Embodiment 1;

[0021] Figure 2 This is a cross-sectional view of the plane at the center of the axis of welding wire 01 in Embodiment 1;

[0022] Figure 3 This is a cross-sectional view of Embodiment 1 located on another central plane where the axis of welding wire 01 is located;

[0023] Figure 4 The explosion of the parts in Example 1 Figure 1 ;

[0024] Figure 5 The explosion of the parts in Example 1 Figure 2 ;

[0025] Figure 6 This is a structural schematic diagram of the support member 120 in Embodiment 1;

[0026] Figure 7 This is a schematic diagram of the structure of the support member 120 after removing the support sleeve 123 in Embodiment 1;

[0027] Figure 8 This is a schematic diagram of the structure of the support member 120 after the support sleeve 123 is removed and it cooperates with the inner liner block 200 in Embodiment 1;

[0028] Figure 9 This is a schematic diagram of the structure of the inner liner block 200 in Embodiment 1;

[0029] Figure 10 This is a structural schematic diagram of Embodiment 2;

[0030] Figure 11 This is a cross-sectional view of the plane at the center of the axis of welding wire 01 in Embodiment 2;

[0031] Figure 12 This is a cross-sectional view of Embodiment 2 located on another center plane where the axis of welding wire 01 is located.

[0032] Figure 13 These are exploded views of some parts from Example 2;

[0033] Figure 14 This is a schematic diagram of the heat sink 310 in Embodiment 2. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Example

[0035] See Figures 1-9 The conductive nozzle device of this embodiment includes a support 120, a connecting seat 110, a connecting sleeve 130, an end cap 140, and an inner liner block 200. The connecting seat 110 is mounted on the welding torch, and the connecting seat 110 is also provided with a connecting seat hole 112 and a connecting screw hole 111.

[0036] The support member 120 is provided with a support stud 121 and a support sleeve 123. The support stud 121 is inserted into the connecting screw hole 112 and is assembled with it by screw thread. Multiple pairs of support bars 124 are installed on the inner side of the support sleeve 123. Two support bars 124 form a pair, and an expansion gap 125 is formed between two pairs of adjacent support bars 124. The support bars 124 are arranged along the axial direction of the support sleeve 123 and are elastic to accommodate the subsequent expansion of the inner liner block 200.

[0037] The support member 120 is also provided with a through support hole 122, an air vent 126, and a slot 127. Support bars 124 are installed on both sides of the slot 127, and the two support bars 124 on both sides of the same slot 127 are a pair. There are multiple slots 127, and two adjacent slots 127 are separated by a connecting part 128.

[0038] The inner liner block 200 is made of ceramic-silver composite material, specifically, a silver film is plated on a 95% alumina ceramic (HV1300-1500) base, with a silver film thickness of not less than 1μm. The inner liner block 200 also has a tapered hole surface 201, a plug-in end 202, and support side grooves 203 on both sides. The support side grooves 203 engage with corresponding support bars 124, and the plug-in end 202 is inserted into a slot 127, thereby achieving the assembly of the inner liner block 200 and the support member 120. Preferably, the slot 127 is filled with conductive paste, which bonds and conducts electricity to the inner wall of the slot 127 and the plug-in end 202.

[0039] The connecting sleeve 130 is fitted over the support sleeve 123. The screw 410 passes through the support member 120 and is screwed into the connecting sleeve 130 by thread to fix the connecting sleeve 130 to the outside of the support sleeve 123 and the support member 120.

[0040] The connecting sleeve 130 has a centrally controlled connecting sleeve cavity 131 inside. A conductive paste groove 133 is provided on one end of the connecting sleeve 130 near the connecting seat 110. A threaded sleeve 132 is disposed within the conductive paste groove 133. The screw 410 passes through the threaded sleeve 132 and is then assembled with the connecting sleeve 130. The conductive paste groove 133 is filled with conductive paste. The threaded sleeve 132 is used to reduce the probability of direct contact between the conductive paste in the conductive paste groove 133 and the screw 410, thereby preventing the conductive paste from interfering with or contaminating the screw 410. Filling the conductive paste groove 133 with conductive paste primarily increases the conductivity between the connecting sleeve 130 and the support member 120.

[0041] The connecting sleeve 130 has a threaded platform 134 at one end away from the connecting seat 110. The threaded platform 134 is inserted into the end cap hole 143 of the end cap 140 and is screwed into it. The end cap 140 also has an inner end face 141, a frustum portion 142, and a through end cap hole 144. The end cap 140 is fitted over the support sleeve 123 and its inner wall fits against the outer wall of the support sleeve 123. The end cap hole 144 penetrates the frustum portion 142 and the end cap 140. The inner end face 141 is located on the end face of the end cap 140 that connects to the frustum portion 142. The frustum portion 142 has a frustum surface 1421.

[0042] The inner end face 141 is fitted with the end face of the support sleeve 123, and the frustum surface 1421 is fitted with the conical hole surface 201, thereby achieving the cooperation between the end cap 140 and the support member 120 and using the cooperation between the frustum surface 1421 and the conical hole surface 201 to prevent the end of the inner liner block 200 away from the slot 127 from forming an open end, thereby interfering with its use.

[0043] Preferably, the side of the support bar 124 does not enter the circle formed by the inner arc surface 204 of the inner liner block 200, and the inner arc surface of the inner liner block 200 is in contact with the welding wire 01 for electrical conductivity. This design is to avoid the support bar 124 interfering with the welding wire and affecting its use.

[0044] Preferably, the expansion gap 125 is filled with conductive paste, which is used to enhance the conductivity between the various liner blocks. The conductive paste can be squeezed to provide clearance space when the liner blocks expand.

[0045] Preferably, the conductive paste in this embodiment needs to be selected as a weather-resistant conductive paste that is suitable for high-temperature operation, such as silver-based conductive paste, graphene conductive paste, etc.

[0046] Figure 2-3 The illustration shows the state in use. Welding wire 01 passes through the connector hole 112, support through hole 122, inner arc surface 204, and end cap through hole 144 before welding. The welding torch supplies power and gas to the entire device through the connector 110. Shielding gas enters through the connector hole 112 and is blown out through the vent hole 126 into the nozzle chamber of the nozzle (not shown). The nozzle is a sleeve-like part fitted around the entire conductive nozzle device and is mounted on the welding torch. This is prior art, so it will not be described in detail here.

[0047] When the inner liner 200 needs to be replaced or inspected, first rotate the support 120 to remove it from the connecting seat 110; then rotate the end cover 140 to remove it, then remove the screw 410 and remove the connecting sleeve 130. The inner liner 200 can then be pulled out from the support for inspection or replacement. The entire process requires no welding, and the inner liner 200 can be replaced easily, significantly reducing installation and subsequent maintenance costs. The inner liner 200 can be effectively fixed by using the insertion end 202 to mate with the slot 127 and the frustum surface 1421 to fit against the conical hole surface 201. The use of conductive paste further enhances the welding effect. Additionally, the slot 127 and support strip 124 effectively position the inner liner 200. Since the inner liner 200 typically has 4-6 petals, current methods use mold positioning followed by welding. This embodiment is clearly more convenient, faster, has lower manufacturing costs, and is more economical to maintain.

[0048] In this embodiment, the screw 410 is designed at the end of the support member 120, which is screwed onto the connector, so that the end of the screw 410 faces the end of the connector. This design serves two purposes: firstly, to protect the screw from contamination by foreign objects; and secondly, to effectively prevent the screw from loosening on its own and affecting its use. Example

[0049] This embodiment adds a liquid cooling function to the first embodiment, thereby enabling the entire device to be used continuously for a long time, as detailed below:

[0050] A cooling ring groove 135 is provided on the outer wall of the connecting sleeve 130. A cooling ring 310 is installed in the cooling ring groove 135. A cooling channel 311 is provided inside the cooling ring 310. The two ends of the cooling channel 311 are respectively connected to the first pipe head 331 and the second pipe head 332. The first pipe head 331 and the second pipe head 332 are both installed on the cooling ring 310. The first pipe head 331 and the second pipe head 332 are respectively connected to the input end and the output end of the liquid cooling circulation system. In this way, the heat-conducting liquid can be input into the cooling channel 311 to remove the heat on the cooling ring 310 to achieve the cooling of the cooling ring 310. The cooling ring 310 removes the heat from the connecting sleeve 130, the support member 120, and the inner liner block 200. This can prevent overheating from causing a decrease in welding quality or affecting the life of the entire device. In this embodiment, the liquid used for cooling can be heat transfer oil, and the liquid cooling circulation system can consist of a heat exchanger and an oil pump. That is, the oil pump pumps the heat transfer oil cooled by the heat exchanger into the cooling channel 311, and the heat transfer oil enters the heat exchanger after passing through the cooling channel 311. The heat exchanger can use air cooling or water cooling for heat dissipation. Of course, this is existing technology, and the heat dissipation and cooling technology of existing hydraulic systems or refrigeration systems can be directly adopted.

[0051] Preferably, for ease of installation, the cooling ring 310 can be configured as two semi-rings, both of which are fitted and fixed onto the cooling ring groove 135. The cooling ring 310 is provided with a clamp groove 312, and a clamp 320 is fitted into the clamp groove 213, thereby using the clamp 320 to tightly fix the two cooling rings 310 in the cooling ring groove 135. A tube can be provided at the end of the cooling ring 310, communicating with the end of the cooling channel 311. The tube is inserted into the cooling channel 311 of the other cooling ring 310 and sealed, thus achieving a sealed connection between the cooling channels 311 of the two cooling rings 310. Alternatively, a sealing structure can be provided at the ends of the two cooling rings 310 to seal the ends, ultimately achieving a sealed connection between the cooling channels 311 of the two cooling rings 310. Regardless of the method used, the goal is to achieve a sealed connection between the cooling channels 311 of the two cooling rings 310. This embodiment is merely illustrative and is not limited to the two methods described above.

[0052] The cooling ring 310 and clamp 320 are both made of non-conductive materials, which can reduce the impact on the conductive nozzle device. For example, the cooling ring 310 is made of high thermal conductivity insulating ceramic, and the clamp is made of polyimide-based composite material, ceramic fiber fabric, etc.

[0053] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application pertains.

[0054] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A conductive nozzle device with a ceramic-silver composite material liner, characterized in that: It includes a support member and an inner liner block. The support member is provided with a support sleeve and a slot. At least two pairs of support bars are provided on the inner side of the support sleeve. An expansion gap is formed between the two pairs of adjacent support bars. The support bars are arranged along the axial direction of the support sleeve. Support bars are installed on both sides of the slot, and the two support bars on both sides of the same slot are a pair; there are at least two slots and two adjacent slots are separated by a connecting part; The inner liner block is provided with a plug-in end and support side grooves on both sides. The support side grooves are engaged with the corresponding support bars. The plug-in end is inserted into the slot. The welding wire passes through the support and the inner liner block, and the welding wire is in contact with the inner liner block to conduct electricity.

2. The conductive tip device according to claim 1, characterized in that: The inner lining block is made of ceramic-silver composite material, with a silver film plated on the surface of alumina ceramic, and the silver film thickness is not less than 1μm.

3. The conductive nozzle device according to claim 1, characterized in that: The side of the support bar does not enter the circle formed by the inner arc surface of the inner liner block, and the inner arc surface of the inner liner block is in contact with the welding wire and conducts electricity.

4. The conductive nozzle device according to claim 1, characterized in that: It also includes a connecting seat, which is fixed on the welding torch. The connecting seat is provided with a connecting seat hole and a connecting screw hole. The support member is provided with a support stud, which is inserted into and assembled with the connecting screw hole.

5. The conductive nozzle device according to claim 1, characterized in that: The slot is filled with conductive paste, which bonds the inner wall of the slot to the insertion end and conducts electricity. The expansion gap is filled with conductive paste.

6. The conductive tip device according to any one of claims 1-5, characterized in that: It also includes an end cap and a connecting sleeve. The connecting sleeve is fitted outside the support sleeve and is installed on the support member outside the support sleeve. The end cap is installed on the connecting sleeve.

7. The conductive tip device according to claim 6, characterized in that: The inner liner block is provided with a conical hole surface, and the end cap is also provided with an inner end face and a frustum portion. The end cap is fitted over the support sleeve and its inner wall is in contact with the outer wall of the support sleeve. The inner end face is located on the end face of the end cap that connects with the frustum portion. The frustum portion is provided with a frustum surface. The inner end face is in contact with the end face of the support sleeve, and the frustum surface is in contact with the conical hole surface.

8. The conductive tip device according to claim 7, characterized in that: A cooling ring groove is provided on the outer wall of the connecting sleeve, and a cooling ring is installed in the cooling ring groove. A cooling channel is provided inside the cooling ring, and the two ends of the cooling channel are respectively connected to the first pipe head and the second pipe head. The first pipe head and the second pipe head are both installed on the cooling ring, and the first pipe head and the second pipe head are respectively connected to the input end and the output end of the liquid cooling circulation system.

9. The conductive nozzle device according to claim 8, characterized in that: The cooling rings are semi-rings, and there are two in total. Both cooling rings are fitted and fixed on the cooling ring grooves, and the cooling rings are provided with clamp grooves, in which clamps are tightly fitted. The cooling channels of the two cooling rings are sealed and connected. The cooling rings and clamps are made of insulating materials.

10. A welding torch, characterized in that: It includes the conductive nozzle device according to any one of claims 1-9.

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