A sheathed thermocouple sheath welding device

Abstract

The utility model belongs to argon arc welding field discloses a kind of armored thermocouple sheath welding device, including bottom plate, fixedly connected with positioning adjusting platform on the bottom plate, positioning adjusting platform is provided with welding gun fixed seat, argon arc welding torch is fixed on the welding gun fixed seat, buffer clamping assembly is also provided on the bottom plate, the position of the positioning adjusting platform is adjusted to buffer clamping assembly for argon arc welding torch, and the buffer clamping assembly is used for clamping armor material.The utility model guarantees the accurate alignment of argon arc welding torch and the armor material clamped by buffer clamping assembly, provides the basis for high-quality welding, buffer clamping assembly can stably clamp armor material, prevent the welding deviation caused by workpiece displacement during welding, while avoid damage to the surface of armor material, take into account welding accuracy and workpiece protection, overall improve the reliability and applicability of armored thermocouple armor material spot welding operation.

Description

Technical Field

[0001] This utility model belongs to the field of argon arc welding, specifically relating to a welding device for armored thermocouple cores. Background Technology

[0002] Armored thermocouples are widely used temperature measurement tools in industrial and scientific research fields. Their construction includes a measuring section (hot junction) at one end and a connecting section (cold junction) at the other. The hot junction is typically welded from two different metals to form a thermocouple junction for temperature measurement. In traditional production processes, the welding of the thermocouple sheath is mainly done manually. The specific steps include using a vise to clamp the exposed metal wire of the cold junction (such as nickel-chromium / nickel-silicon) to form a discharge circuit with the argon arc welder, adjusting the welding parameters, and then manually controlling the welding process.

[0003] The existing methods for welding the sheathed thermocouple core have the following main problems: manual operation not only leads to low production efficiency, making it difficult to meet the needs of large-scale production, but also makes it impossible to achieve precise alignment between the welding torch and the sheath, resulting in significant inconsistencies in the welding effect and affecting the long-term stability and measurement accuracy of the thermocouple; at the same time, the traditional bench vise clamping method cannot form a stable and suitable clamping for the sheath, which can easily cause the sheath to shift during the welding process. This may not only cause the welding point to deviate from the tube wall and damage the sheath, but also cause potential damage to the sheath due to improper clamping, which greatly reduces the reliability and service life of the product. Utility Model Content

[0004] The purpose of this invention is to provide a welding device for armored thermocouple cores to overcome the shortcomings of the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: This utility model provides a welding device for armored thermocouple cores, including a base plate, a positioning adjustment platform fixedly connected to the base plate, a welding torch fixing seat provided on the positioning adjustment platform, an argon arc welding torch fixed on the welding torch fixing seat, and a buffer clamping assembly provided on the base plate. The positioning adjustment platform is used to adjust the position of the argon arc welding torch to the buffer clamping assembly, and the buffer clamping assembly is used to clamp the armor material.

[0006] Furthermore, the buffer clamping assembly includes an adaptive clamping cylinder, on which a cylinder push rod is provided, and a clamping head is connected to the cylinder push rod. The adaptive clamping cylinder is provided with a plurality of holes of different diameters, including holes with diameters of 6mm, 8mm, 10mm and 12mm respectively. The adaptive clamping cylinder is also provided with a push button switch and a cylinder action switch.

[0007] Furthermore, it also includes an argon arc welding control module, which is electrically connected to the argon arc welding torch and is used to control the arc ignition time, welding time and arc termination time of the argon arc welding torch.

[0008] Furthermore, the clamping head is an elastic floating clamping head, and the elastic floating clamping head is provided with a flexible buffer structure inside. The elastic floating clamping head is driven and connected to the cylinder push rod.

[0009] Furthermore, the positioning and adjustment platform is an XYZ three-axis lead screw guide table, which includes an X-axis module, a Y-axis module and a Z-axis module. Each axis module is spliced ​​together by an L-shaped connecting seat. The L-shaped connecting seat is provided with a positioning pin and a tapered locking bolt on its inner side.

[0010] Furthermore, the bottom of the connecting seat of the X-axis module and the Y-axis module is integrated with a T-slot, which is locked and fixed to the slider of the Y-axis module by a wedge-shaped pressure block; the Z-axis module and the Y-axis module are connected by a bidirectional flange, and the flange has four waist-shaped holes evenly distributed around its circumference, which can adjust the front and rear position of the Z-axis, with an adjustment range of ±30mm.

[0011] Furthermore, the outer side of each connection of the XYZ three-axis lead screw guide is provided with triangular reinforcing ribs, and the reinforcing ribs are made of aluminum alloy 6061-T6.

[0012] Furthermore, the welding torch holder includes a C-shaped carbon steel claw and a silicone anti-slip pad. The inner side of the C-shaped carbon steel claw is provided with a V-shaped groove to accommodate an argon arc welding torch with a diameter of 8-15mm.

[0013] Furthermore, the C-shaped carbon steel jaws are equipped with wing bolts, and the tail of the wing bolts integrates a torque limiting ring.

[0014] Furthermore, a transverse dovetail groove and an adjusting screw are provided between the bottom of the welding torch holder and the Z-axis module slider, which can finely adjust the horizontal position of the argon arc welding torch. The top of the welding torch holder is connected to a universal ball joint with a scale ring. The universal ball joint is equipped with a quick-locking handle, and a compression spring is installed below the universal ball joint.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects: This invention provides a welding device for armored thermocouple cores. The device uses a positioning adjustment platform to precisely adjust the position of the argon arc welding torch, ensuring accurate alignment between the torch and the armor material held by the buffer clamping assembly, thus providing a foundation for high-quality welding. The buffer clamping assembly securely holds the armor material, preventing welding deviations caused by workpiece displacement during welding, while also avoiding damage to the armor surface. This approach balances welding accuracy and workpiece protection, comprehensively improving the reliability and applicability of spot welding operations on armored thermocouple cores.

[0016] Specifically, this utility model, by setting clamping blocks with various apertures of 6mm, 8mm, 10mm, and 12mm and V-groove welding torch fixtures, can be compatible with armor materials and argon arc welding torches of different specifications, eliminating the need for frequent tooling changes and greatly improving the equipment's versatility.

[0017] Specifically, the flexible buffer structure of the clamping head of this utility model can adaptively adjust the clamping force, which not only ensures the stable positioning of the armor material, but also avoids damage to the surface of the precision armor material caused by rigid clamping, effectively reducing the scrap rate of the workpiece.

[0018] Specifically, the XYZ three-axis lead screw guide table of this utility model ensures the verticality of the three axes and the rigidity of the structure through the design of positioning pins, tapered locking bolts and reinforcing ribs; the multi-dimensional fine adjustment function of the welding torch fixing seat can realize the precise calibration of the welding point, and together with the argon arc welding control module for precise control of welding parameters, it significantly improves the consistency and reliability of the weld point. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a welding device for the armored thermocouple core in an embodiment of this utility model.

[0020] In the diagram, 1. Clamping head; 2. Adaptive clamping cylinder; 3. XYZ three-axis lead screw guide; 4. Welding torch holder; 5. C-type carbon steel gripper; 6. Argon arc welding torch; 7. V-groove; 8. Base plate. Detailed Implementation

[0021] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0022] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0026] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0027] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0028] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0029] The accompanying drawings show various structural schematic diagrams according to embodiments of the present invention. These drawings are not to scale, and some details have been enlarged and may have been omitted for clarity. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0030] See Figure 1 This utility model provides a welding device for armored thermocouple cores, including a base plate 8. A positioning and adjustment platform is fixedly connected to the base plate 8, and a welding torch fixing seat 4 is provided on the positioning and adjustment platform. An argon arc welding torch 6 is fixed on the welding torch fixing seat 4. A buffer clamping assembly is also provided on the base plate 8. The positioning and adjustment platform is used to adjust the spatial position of the argon arc welding torch 6 to accurately align it with the welding part of the armor material held by the buffer clamping assembly, ensuring welding accuracy. The buffer clamping assembly is used to firmly clamp armor materials of different specifications, preventing displacement during welding and avoiding damage to the surface of the armor material. In this embodiment, through the precise movement of the positioning and adjustment platform, the argon arc welding torch 6 can be accurately aligned with the armor material, while the buffer clamping assembly provides a stable clamping force, avoiding displacement or damage to the workpiece during welding, ensuring the accuracy of the welding point and the stability of the welding process, and improving the yield and production efficiency of armored thermocouples.

[0031] In some preferred embodiments of this utility model, the buffer clamping assembly includes an adaptive clamping cylinder 2. The adaptive clamping cylinder 2 is equipped with a cylinder push rod, and a clamping head 1 is connected to the cylinder push rod. The adaptive clamping cylinder 2 has several holes of different diameters, including holes with diameters of 6mm, 8mm, 10mm, and 12mm, which can accommodate armor materials with different outer diameters. The adaptive clamping cylinder 2, through the linkage between the cylinder push rod and the clamping head 1, achieves automatic adaptive clamping of armor materials with different diameters. The adaptive clamping cylinder 2 is also equipped with a push button switch and a cylinder action switch. The push button switch controls the connection of the compressed air power source, and the cylinder action switch controls the extension and retraction of the cylinder push rod to drive the clamping head 1 to complete the clamping or releasing action, achieving rapid material change and improving work efficiency.

[0032] In some preferred embodiments of this utility model, an argon arc welding control module is also included. The argon arc welding control module is electrically connected to the argon arc welding torch 6 and is used to control the arc ignition time, welding time and arc termination time of the argon arc welding torch 6. The argon arc welding control module can accurately control the arc ignition, welding and arc termination time of the argon arc welding torch 6 according to preset parameters, avoiding the inconsistency and error of manual adjustment, and ensuring the consistency of the welding process and the stability of welding quality.

[0033] In some preferred embodiments of this utility model, the clamping head 1 is an elastic floating clamping head, and the elastic floating clamping head is provided with a flexible buffer structure inside. The elastic floating clamping head is driven and connected to the cylinder push rod. The clamping force can be automatically adjusted according to the size of the armor material through the flexible buffer structure, which can not only ensure the stability of the clamping, but also avoid damage to the surface of the armor material caused by rigid clamping. It is especially suitable for the processing of precision armor materials. In this embodiment, the flexible buffer structure can specifically be a spring.

[0034] In some preferred embodiments of this utility model, the positioning and adjustment platform is an XYZ three-axis lead screw guide table 3. The XYZ three-axis lead screw guide table 3 includes each axis module connected by an L-shaped connecting seat. The inner side of the L-shaped connecting seat is provided with a positioning pin and a tapered locking bolt. Technically, the XYZ three-axis lead screw guide table 3 achieves omnidirectional adjustment of the position of the argon arc welding torch 6 through precise movement in the X, Y, and Z directions. The connection of each axis module via the positioning pin and tapered locking bolt of the L-shaped connecting seat ensures the perpendicularity and stability between the X-axis module, Y-axis module, and Z-axis module. Simultaneously, the precise transmission of the lead screw guide table enables precise adjustment of the position of the argon arc welding torch 6.

[0035] In this embodiment, the bottom of the connecting seat between the X-axis module and the Y-axis module integrates a T-slot, which is locked and fixed to the Y-axis module slider by a wedge-shaped pressure block. The Z-axis module and the Y-axis module are connected by a bidirectional flange with four evenly distributed oblong holes on the circumference of the flange, allowing adjustment of the Z-axis position within a range of ±30mm. Technically, the combination of the T-slot and wedge-shaped pressure block achieves a stable and adjustable connection between the X-axis module and the Y-axis module, while the connection between the Z-axis module and the Y-axis module via the bidirectional flange and oblong holes allows for flexible adjustment of the Z-axis position. In principle, the locking and fixing of the T-slot and wedge-shaped pressure block ensures the stability of the X-axis and Y-axis connection, while the design of the bidirectional flange and oblong holes allows the Z-axis to move back and forth within a certain range, meeting different welding requirements. The adjustment range of ±30mm enhances the adaptability of the equipment to different welding scenarios.

[0036] In this embodiment, triangular reinforcing ribs are provided on the outer side of each connection of the XYZ three-axis lead screw guide 3. The reinforcing ribs are made of aluminum alloy 6061-T6. The triangular reinforcing ribs can significantly improve the structural rigidity and torsional resistance of each axis connection. The aluminum alloy 6061-T6 material reduces the overall weight of the equipment while ensuring strength, making it easier to handle and install.

[0037] In some preferred embodiments of this utility model, the welding torch holder 4 includes a C-shaped carbon steel claw 5 and a silicone anti-slip pad. The C-shaped carbon steel claw 5 has a V-groove 7 on its inner side to accommodate argon arc welding torches 6 with diameters of 8-15mm. The C-shaped carbon steel claw 5 is equipped with a wing bolt, the tail of which integrates a torque limiting ring. The C-shaped carbon steel claw 5 achieves stable clamping of the argon arc welding torch 6 through adjustment of the wing bolt, while the torque limiting ring prevents damage to the welding torch that may be caused by excessive clamping force. The V-groove 7 is designed to accommodate argon arc welding torches 6 of different diameters, ensuring stable fixing of the welding torch, while the silicone anti-slip pad increases the friction between the welding torch and the claw, preventing the welding torch from sliding during the welding process.

[0038] In some preferred embodiments of this utility model, a transverse dovetail groove and an adjusting screw are provided between the bottom of the welding torch holder 4 and the Z-axis module slider, which can finely adjust the horizontal position of the argon arc welding torch 6. A universal ball joint with a graduated ring is connected to the top of the welding torch holder 4. The universal ball joint is equipped with a quick-locking handle, and a compression spring is installed below the universal ball joint. The transverse dovetail groove and adjusting screw enable fine adjustment of the horizontal position of the welding torch, while the universal ball joint with a graduated ring allows for flexible adjustment of the welding torch angle. The compression spring provides cushioning when the welding torch is pressed down, avoiding damage caused by rigid contact between the welding torch and the workpiece.

[0039] Work process description: The working process of the armored thermocouple core welding device of this application is as follows: First, the operator connects 0.5MPa compressed air and starts the system via a button switch to provide power for the entire device. Then, the armor material with an outer diameter of 6mm to be welded is inserted into the clamping block through the bottom of the corresponding hole clamping block. By clicking the cylinder action switch, the cylinder push rod on the adaptive clamping cylinder 2 is activated to fix the inserted armor material. During placement, the operator needs to select the corresponding hole position according to the diameter of the armor material. This device provides hole positions with diameters of 6mm, 8mm, 10mm, and 12mm to accommodate armor materials of different diameters. Next, the operator uses the XYZ three-axis lead screw guide 3 to precisely adjust the position of the argon arc welding torch 6 so that the argon arc welding torch 6 is perpendicular to the center position of the thermocouple armor material. The parameters of the TIG welding machine are adjusted using the TIG welding control module. The arc ignition, welding time, and arc termination time are set. After parameter confirmation, click "Start Selection." The TIG welding torch 6 will then be moved to the workpiece via a servo motor driven by the Y-axis lead screw and execute the welding program. After welding, the TIG welding torch 6 automatically returns to zero, ready for the next workpiece. The entire process is automated, improving welding efficiency and yield while reducing production costs. During welding, the flexible buffer structure inside the elastic floating clamping head ensures stable clamping of the armor material, preventing damage due to excessive clamping force. The precise adjustment capability of the XYZ three-axis lead screw guide 3 ensures accurate positioning of the TIG welding torch 6, improving welding precision. The combination of the C-type carbon steel jaws 5 and the silicone anti-slip pads ensures stable torch fixation, while the horizontal dovetail groove and adjusting screw at the bottom of the torch holder 4 allow for fine-tuning of the torch's horizontal position. The universal ball joint and compression spring at the top provide adjustment and buffering for the torch angle, ensuring the stability and precision of the welding process. The entire device achieves efficient and stable welding of armored thermocouple cores through automated control and precise adjustment, thereby improving yield and production efficiency.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A welding device for the sheathed thermocouple core, characterized in that, Includes a base plate (8), on which a positioning adjustment platform is fixedly connected, and a welding torch fixing seat (4) is provided on the positioning adjustment platform. An argon arc welding torch (6) is fixed on the welding torch fixing seat (4). A buffer clamping assembly is also provided on the base plate (8). The positioning adjustment platform is used to adjust the position of the argon arc welding torch (6) to the buffer clamping assembly, and the buffer clamping assembly is used to clamp the armor material.

2. The armored thermocouple core welding device according to claim 1, characterized in that, The buffer clamping assembly includes an adaptive clamping cylinder (2), on which a cylinder push rod is provided, and a clamping head (1) is connected to the cylinder push rod. The adaptive clamping cylinder (2) is provided with several holes of different diameters, including holes with diameters of 6mm, 8mm, 10mm and 12mm respectively. The adaptive clamping cylinder (2) is also provided with a push button switch and a cylinder action switch.

3. The armored thermocouple core welding device according to claim 2, characterized in that, It also includes an argon arc welding control module, which is electrically connected to the argon arc welding gun (6) and is used to control the arc start time, welding time and arc end time of the argon arc welding gun (6).

4. The armored thermocouple core welding device according to claim 2, characterized in that, The clamping head (1) is an elastic floating clamping head, and the elastic floating clamping head is provided with a flexible buffer structure inside. The elastic floating clamping head is driven and connected to the cylinder push rod.

5. The armored thermocouple core welding device according to claim 2, characterized in that, The positioning and adjustment platform is an XYZ three-axis lead screw guide (3). The XYZ three-axis lead screw guide (3) includes an X-axis module, a Y-axis module and a Z-axis module. Each axis module is spliced ​​together by an L-shaped connecting seat. The L-shaped connecting seat is provided with a positioning pin and a tapered locking bolt on its inner side.

6. The armored thermocouple core welding device according to claim 5, characterized in that, The bottom of the connecting seat of the X-axis module and the Y-axis module is integrated with a T-slot, which is locked and fixed to the slider of the Y-axis module by a wedge-shaped pressure block; the Z-axis module and the Y-axis module are connected by a bidirectional flange, and the flange has four waist-shaped holes evenly distributed around its circumference for adjusting the front and rear position of the Z-axis.

7. The armored thermocouple core welding device according to claim 5, characterized in that, The XYZ three-axis lead screw guide (3) is provided with triangular reinforcing ribs on the outer side of each connection point. The reinforcing ribs are made of aluminum alloy 6061-T6.

8. The armored thermocouple core welding device according to claim 1, characterized in that, The welding torch holder (4) includes a C-shaped carbon steel claw (5) and a silicone anti-slip pad. The inner side of the C-shaped carbon steel claw (5) is provided with a V-shaped groove (7).

9. The armored thermocouple core welding device according to claim 8, characterized in that, The C-type carbon steel gripper (5) is equipped with a wing bolt, and the tail of the wing bolt is integrated with a torque limiting ring.

10. The armored thermocouple core welding device according to claim 5, characterized in that, The bottom of the welding torch holder (4) is provided with a horizontal dovetail groove and an adjusting screw between it and the Z-axis module slider, which are used to finely adjust the horizontal position of the argon arc welding torch (6). The top of the welding torch holder (4) is connected to a universal ball joint with a scale ring. The universal ball joint is equipped with a quick-locking handle, and a compression spring is installed below the universal ball joint.

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