Cold end automatic welding device for composite core platinum rhodium wire

Abstract

The utility model belongs to composite core production and processing technical field, and disclose composite core platinum rhodium silk cold end automatic welding device, including fixed bolster, install rotating drive assembly on the fixed bolster, rotating drive assembly is connected with composite core station index plate, the even distribution's mounting hole is set up on the outer wall of composite core station index plate, the mounting hole is provided with hard insulating catheter, hard insulating catheter swing joint has pre -fixed composite core, through the rotating drive assembly of gear drive, the rotation angle of composite core station index plate is accurately controlled, and the three -dimensional size matching design of cooperation mounting hole and hard insulating catheter, the copper wire of pre -fixed composite core is accurately embedded positioning, completely replaces manual holding and the operation of placement, and the contact point of platinum rhodium silk and copper wire is pre -locked through internal positioning card of pre -fixed composite core, and the overall fixation of combination support is combined, and the positional deviation before welding is eliminated from the source.

Description

Technical Field

[0001] This utility model belongs to the field of composite core production and processing technology, specifically an automatic cold-end welding device for composite core platinum-rhodium wire. Background Technology

[0002] In fields such as industrial testing and temperature measurement, composite probes are widely used due to their accurate detection performance. Among them, the composite core is the core component of the composite probe. The welding quality of the cold end of the internal thermocouple wire (platinum-rhodium wire) directly determines the temperature measurement accuracy and stability of the composite probe. At present, the welding process of the cold end of the platinum-rhodium wire of the composite core is mainly completed manually: the operator needs to hold the composite core bracket with one hand, place the copper wire on the bracket on the lower electrode of the welding machine, and use tweezers to pick up the two platinum-rhodium wires outside the U-shaped quartz tube and place them on the copper wire. Finally, the welding machine is started by the foot switch to complete the welding.

[0003] However, manual welding has many insurmountable drawbacks: 1. High operational threshold: Manual welding requires extremely high visual acuity from operators, and prolonged operation can easily lead to visual fatigue and increase the risk of operational errors; 2. Poor quality stability: There are significant differences in welding skills and welding speed among different operators, making it difficult to ensure welding consistency, which in turn results in poor temperature stability of the composite core and large fluctuations in product quality; 3. Low degree of automation: The production efficiency of manual welding is limited, and with the continuous rise in labor costs, traditional manual welding methods can no longer meet the development needs of enterprises to reduce costs, increase efficiency, and achieve high-quality, large-scale production.

[0004] Therefore, an automatic cold-end welding device for composite core platinum-rhodium wire is proposed to address the above problems. Utility Model Content

[0005] To address the problems mentioned in the background art, this utility model provides an automatic cold-end welding device for composite core platinum-rhodium wire, which has the advantages of precise positioning and automated operation to replace manual operation, ensuring stable welding quality and adapting to multiple specifications of composite cores to meet the needs of large-scale production.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an automatic cold-end welding device for composite core platinum-rhodium wire, comprising a fixed bracket, a rotary drive assembly mounted on the fixed bracket, a composite core station indexing plate connected to the rotary drive assembly, uniformly distributed mounting holes on the outer wall of the composite core station indexing plate, a rigid insulating conduit installed in the mounting holes, a pre-fixed composite core movably connected to the rigid insulating conduit, an upper electrode and a lower electrode arranged correspondingly on one side of the composite core station indexing plate, an upper cylinder and a lower cylinder respectively connected to the upper electrode and the lower electrode, both the upper cylinder and the lower cylinder being mounted on the fixed bracket; The pre-fixed composite core includes a quartz tube inside the composite core, an oxygen cell inside the composite core, a platinum-rhodium wire positioning clip inside the composite core, a combined bracket inside the composite core, copper wires inside the composite core, and platinum-rhodium wires inside the composite core. The platinum-rhodium wires inside the composite core are positioned at the contact point of the two copper wires to be welded by the platinum-rhodium wire positioning clip inside the composite core. The copper wires inside the composite core can be inserted into a rigid insulating conduit.

[0007] Preferably, the rotary drive assembly includes a rotating column fixed at the center of the bottom of the composite core station indexing plate, a driven gear fixedly connected to the bottom end of the rotating column, a driving gear meshing with the driven gear, and a drive motor connected to the driving gear through a motor shaft.

[0008] Preferably, the bottom end of the rotating column passes through the fixed bracket, and the rotating column is rotatably connected to the fixed bracket. An L-shaped bracket is fixedly connected to the fixed bracket at a position corresponding to the drive motor, and the drive motor is mounted on the L-shaped bracket.

[0009] Preferably, both the upper electrode and the lower electrode are connected to a welding machine power supply via wires, and the welding machine power supply is mounted on a fixed bracket.

[0010] Preferably, the inner diameter of the mounting hole is the same as the outer diameter of the rigid insulating conduit, and the inner diameter of the rigid insulating conduit is the same as the diameter of the copper wire inside the composite core.

[0011] Preferably, two adjacent mounting holes form a group, and the rigid insulating conduit in each group of mounting holes is used for the insertion and positioning of the copper wire inside the composite core of the same pre-fixed composite core.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model uses a gear-driven rotary drive component to precisely control the rotation angle of the composite core station indexing plate. Combined with the triple-size matching design of the mounting hole and the rigid insulating conduit, the copper wire of the pre-fixed composite core is precisely embedded and positioned, completely replacing manual hand-held and placement operations. This synergistic structure not only eliminates the positional shaking and angle error of manual operation, but also achieves continuous welding of batch composite cores through the coordination of automated rotation and electrode action, greatly improving production efficiency and positioning consistency. 2. This utility model's pre-fixed composite core uses an internal positioning card to pre-lock the contact point between the platinum-rhodium wire and the copper wire. Combined with the overall fixation of the combined bracket, it eliminates positional deviations before welding from the source. The cylinder-driven design of the electrode system allows for flexible adjustment of electrode pressure and action sequence according to welding requirements. Coupled with a stable welding machine power output, it ensures that welding quality is not affected by differences in manual operation. At the same time, the device supports the adaptation of composite cores of different specifications (by adjusting the rigid insulated conduit and cylinder parameters), which not only meets the quality stability requirements of high-precision welding, but also provides support for large-scale production and subsequent automation upgrades, helping enterprises reduce costs and increase efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a structural schematic diagram of the present invention from another angle; Figure 3 This is a schematic diagram of the bottom structure of this utility model; Figure 4 This is a schematic diagram of the structure of the rotary drive assembly of this utility model; Figure 5 This is a schematic diagram of the pre-fixed composite core of this utility model.

[0014] In the diagram: 1. Fixed bracket; 2. Rotary drive assembly; 21. Rotating column; 22. Driven gear; 23. Driving gear; 24. Drive motor; 25. L-shaped bracket; 3. Composite core indexing plate; 4. Mounting holes; 5. Rigid insulated conduit; 6. Pre-fixed composite core; 61. Quartz tube inside the composite core; 62. Oxygen cell inside the composite core; 63. Platinum-rhodium wire positioning clip inside the composite core; 64. Combined bracket inside the composite core; 65. Copper wire inside the composite core; 66. Platinum-rhodium wire inside the composite core. 7. Upper electrode; 8. Lower electrode; 9. Upper cylinder; 10. Lower cylinder; 11. Welding machine power supply. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] like Figures 1 to 5As shown, this utility model provides an automatic cold-end welding device for composite core platinum-rhodium wire, including a fixed bracket 1. A rotary drive assembly 2 is mounted on the fixed bracket 1. The fixed bracket 1 serves as the rigid foundation of the entire device, integrating and fixing the rotary drive assembly 2, electrode system, cylinder, and other core components to prevent positioning deviations caused by component loosening during operation, providing stable support for high-precision welding. The rotary drive assembly 2 is connected to a composite core station indexing plate 3. The outer wall of the composite core station indexing plate 3 has evenly distributed mounting holes 4. A rigid insulating conduit 5 is installed in the mounting holes 4. The inner diameter of the mounting holes 4 is consistent with the outer diameter of the rigid insulating conduit 5, and the inner diameter of the rigid insulating conduit 5 matches the diameter of the copper wire 65 inside the composite core, forming a triple-size matching positioning logic to ensure pre-fixed composite core welding. The composite core 6 is precisely embedded in the rigid insulating conduit 5 through the copper wire 65 inside the composite core, eliminating the positional shaking when manually held. The rigid insulating conduit 5 is movably connected to the pre-fixed composite core 6. On one side of the composite core station indexing plate 3, there are upper electrodes 7 and lower electrodes 8 arranged vertically. The upper electrodes 7 and lower electrodes 8 are respectively connected to upper cylinder 9 and lower cylinder 10. The upper cylinder 9 controls the raising and lowering of the upper electrode 7, raising it to avoid the workpiece before welding and pressing it down precisely during welding. The lower cylinder 10 controls the raising and lowering of the lower electrode 8, lifting the workpiece during welding and lowering it after welding to avoid interfering with the rotation of the composite core station indexing plate 3, realizing the coordinated operation of electrode action and indexing plate rotation, replacing the synchronous operation of manual foot switch. Both the upper cylinder 9 and the lower cylinder 10 are mounted on the fixed bracket 1. The pre-fixed composite core 6 includes a quartz tube 61 inside the composite core, an oxygen cell 62 inside the composite core, a platinum-rhodium wire positioning clip 63 inside the composite core, a combined bracket 64 inside the composite core, copper wires 65 inside the composite core, and platinum-rhodium wires 66 inside the composite core. The platinum-rhodium wires 66 inside the composite core are positioned at the contact points of the two copper wires 65 inside the composite core to be welded by the platinum-rhodium wire positioning clip 63. The contact points between the platinum-rhodium wires 66 and the copper wires 65 inside the composite core are pre-locked by the platinum-rhodium wire positioning clip 63. Combined with the combined bracket 64 inside the composite core, the components are fixed as a whole, eliminating the operational errors during manual placement from the inside out, and ensuring that the welding point is always in the center area of ​​the electrode. The copper wires 65 inside the composite core can be inserted into the rigid insulating conduit 5.

[0017] Specifically, the rotary drive assembly 2 includes a rotating column 21 fixed at the bottom center of the composite core station indexing plate 3. A driven gear 22 is fixedly connected to the bottom end of the rotating column 21. The driven gear 22 is meshed with a driving gear 23. The driving gear 23 is connected to a drive motor 24 through a motor shaft. The drive motor 24 outputs power, which is transmitted through the meshing of the driving gear 23 and the driven gear 22. By utilizing the rigid meshing characteristics of gear transmission, the rotation angle is ensured to be precise and controllable, avoiding slippage, realizing the horizontal angle change of the composite core station indexing plate 3, and solving the angle error problem when rotating manually.

[0018] Furthermore, the bottom end of the rotating column 21 passes through the fixed bracket 1, and the rotating column 21 is rotatably connected to the fixed bracket 1. An L-shaped bracket 25 is fixedly connected to the fixed bracket 1 at the position corresponding to the drive motor 24. The drive motor 24 is mounted on the L-shaped bracket 25. The fixation of the drive motor 24 by the L-shaped bracket 25 enhances the stability of the transmission system and avoids transmission deviation caused by motor vibration.

[0019] Furthermore, both the upper electrode 7 and the lower electrode 8 are connected to the welding machine power supply 11 via wires. The welding machine power supply 11 is mounted on the fixed bracket 1 to ensure stable output of welding current. Combined with the adjustable pressure design of the cylinder, the parameters can be adjusted according to the welding requirements of composite cores of different specifications, thereby improving the versatility of the device.

[0020] It is worth noting that the inner diameter of the mounting hole 4 is consistent with the outer diameter of the rigid insulating conduit 5, and the inner diameter of the rigid insulating conduit 5 is consistent with the diameter of the copper wire 65 inside the composite core. The precise positioning of the composite core is achieved through size matching, ensuring that the spatial position of each composite core on the composite core station indexing plate 3 is completely consistent, providing a basis for the consistency of batch welding.

[0021] It is worth noting that two adjacent mounting holes 4 form a group. The rigid insulating conduit 5 in each group of mounting holes 4 allows the copper wire 65 inside the composite core of the same pre-fixed composite core 6 to be inserted and positioned. This adapts to the characteristic that the composite core needs to be welded with two copper wires, so that the relative positions of the two wires of the same composite core on the indexing plate are fixed. The electrodes can be aligned sequentially without secondary adjustment, thus improving positioning efficiency and accuracy.

[0022] Among them, the drive motor 24, the upper cylinder 9, and the lower cylinder 10 are existing technologies and will not be described in detail; at the same time, this utility model also includes a controller and switches, which are not the main technical points of this patent and will not be described in detail.

[0023] Working principle and process: During operation, the pre-fixed composite core 6 is first positioned by inserting the copper wire 65 inside the composite core into the rigid insulating conduit 5 inside the mounting hole 4 on the composite core station indexing plate 3. At this time, the platinum-rhodium wire 66 inside the composite core is pre-fixed to the welding position of the copper wire 65 by the platinum-rhodium wire positioning clip 63. Then, the rotary drive assembly 2 is started, and the drive motor 24 meshes with the driven gear 22 through the drive gear 23, driving the rotating column 21 and the composite core station indexing plate 3 to rotate, sending the first composite core to the welding position corresponding to the upper electrode 7 and the lower electrode 8. Then, the lower air... Cylinder 10 drives the lower electrode 8 to rise and lift the copper wire 65 inside the composite core. The upper cylinder 9 drives the upper electrode 7 to fall. The welding machine power supply 11 supplies power to make the electrode conductive and complete the welding of the first wire. After welding, the electrode is reset. The composite core station indexing plate 3 rotates a certain angle so that the other copper wire 65 of the same pre-fixed composite core 6 is aligned with the electrode. The above welding action is repeated. After the double welding point welding of the same pre-fixed composite core 6 is completed, the composite core station indexing plate 3 rotates a certain angle to send the next pre-fixed composite core 6 to the welding position. The above process is repeated until all composite cores are welded.

[0024] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic cold-end welding device for composite core platinum-rhodium wire, comprising a fixed bracket (1), characterized in that: A rotary drive assembly (2) is installed on the fixed bracket (1). The rotary drive assembly (2) is connected to a composite core station indexing plate (3). The outer wall of the composite core station indexing plate (3) is provided with uniformly distributed mounting holes (4). A rigid insulating conduit (5) is provided in the mounting hole (4). The rigid insulating conduit (5) is movably connected to a pre-fixed composite core (6). An upper electrode (7) and a lower electrode (8) are provided on one side of the composite core station indexing plate (3). The upper electrode (7) and the lower electrode (8) are respectively connected to an upper cylinder (9) and a lower cylinder (10). The upper cylinder (9) and the lower cylinder (10) are both installed on the fixed bracket (1). The pre-fixed composite core (6) includes a quartz tube (61) inside the composite core, an oxygen cell (62) inside the composite core, a platinum-rhodium wire positioning clip (63) inside the composite core, a combined bracket (64) inside the composite core, a copper wire (65) inside the composite core, and a platinum-rhodium wire (66) inside the composite core. The platinum-rhodium wire (66) inside the composite core is positioned at the contact point of the two copper wires (65) inside the composite core to be welded by the platinum-rhodium wire positioning clip (63). The copper wires (65) inside the composite core can be inserted into the rigid insulating conduit (5).

2. The automatic cold-end welding device for composite core platinum-rhodium wire according to claim 1, characterized in that: The rotary drive assembly (2) includes a rotating column (21) fixed at the bottom center of the composite core workstation indexing plate (3). A driven gear (22) is fixedly connected to the bottom end of the rotating column (21). The driven gear (22) is meshed with a driving gear (23). The driving gear (23) is connected to a drive motor (24) through a motor shaft.

3. The automatic cold-end welding device for composite core platinum-rhodium wire according to claim 2, characterized in that: The bottom end of the rotating column (21) passes through the fixed bracket (1), and the rotating column (21) is rotatably connected to the fixed bracket (1). An L-shaped bracket (25) is fixedly connected to the fixed bracket (1) at the position corresponding to the drive motor (24), and the drive motor (24) is mounted on the L-shaped bracket (25).

4. The automatic cold-end welding device for composite core platinum-rhodium wire according to claim 1, characterized in that: The upper electrode (7) and the lower electrode (8) are respectively connected to a welding machine power supply (11) via wires. The welding machine power supply (11) is mounted on a fixed bracket (1).

5. The automatic cold-end welding device for composite core platinum-rhodium wire according to claim 1, characterized in that: The inner diameter of the mounting hole (4) is consistent with the outer diameter of the rigid insulating conduit (5), and the inner diameter of the rigid insulating conduit (5) is consistent with the diameter of the composite core inner copper wire (65).

6. The automatic cold-end welding device for composite core platinum-rhodium wire according to claim 1, characterized in that: Two adjacent mounting holes (4) form a group, and the rigid insulating conduit (5) in each group of mounting holes (4) is used for the insertion and positioning of the copper wire (65) inside the composite core of the same pre-fixed composite core (6).

Images