Automatic butt-welding machine for hot end of thermocouple wire

Abstract

The utility model relates to the field of welding equipment, in particular to an automatic butt-welding machine for a hot end of a thermocouple wire, which is characterized in that two wire discs are arranged at one end of a table body, a wire gathering pipe extending along the length direction of the table body is arranged in the middle of the table body, and two strands of wires are respectively released by the two wire discs and penetrate through the wire gathering pipe; a translation mechanism sliding in the length direction of the table body is arranged on the table body on the side, away from the wire disc, of the wire gathering pipe, and a welding head used for welding the free ends of the two strands of wires is fixedly installed on the translation mechanism; the translation mechanism is further provided with a wire drawing clamp used for clamping two strands of wires, the table body is provided with a lifting mechanism, and the lifting mechanism is provided with scissors used for cutting off the two strands of wires between the wire drawing clamp and the wire gathering pipe. The ends of the two strands of silk threads in the splayed shape are attached through axial movement of the silk gathering pipe, and butt welding is conducted on the ends of the two strands of silk threads through movement of the carbon rod.

Description

TECHNICAL FIELD

[0001] The utility model relates to welding equipment field, concretely relates to thermocouple wire hot end automatic butt welding machine. BACKGROUND

[0002] With the price rise of precious metal platinum rhodium, in order to control the cost of rapid thermocouple, the diameter of platinum rhodium wire is generally 0.1~0.028mm, so the requirement of platinum rhodium wire welding technology is higher and higher. At present, the hot end welding of thermocouple wire for molten steel temperature detection commonly has two welding modes: one is that two kinds of wires are cross pressure welded (or called spot welded) into junction point, and the other is that two kinds of wires are butt welded into spherical temperature bag. Although the cross welding mode is simpler in welding process, the cross welding point is not as firm as other welding modes (such as butt welding spherical temperature bag), and the welding point quality can be influenced by operation technology, and the size of cross welding point is difficult to control accurately, which can influence the temperature measurement accuracy and reliability of thermocouple. The welding point of butt welding spherical temperature bag is usually firm, can bear larger mechanical stress and temperature change, and the welding point is uniform, which is beneficial to improve the temperature measurement accuracy and reliability of thermocouple.

[0003] Although the butt welding spherical temperature bag has more advantages, the welding mode of rapid thermocouple wire is still that the two kinds of wires are sent to the electrode carbon rod of welding machine power supply by using forceps to be butt welded into temperature bag, and then cut according to the required length for use, which is low in production efficiency and can not meet the demand of modern production, and needs to be improved. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing thermocouple wire hot end automatic butt welding machine, and automatically completes the butt welding and cutting of wire, to solve the defects in the above background technology.

[0005] In order to realize the above object, the utility model provides the following technical scheme:

[0006] Thermocouple wire hot end automatic butt welding machine, including the long strip shape's table body, the one end of table body is equipped with two wire reels, the middle part of table body is equipped with the gather silk pipe along the length direction of table body extension, two silk threads are released and pass through gather silk pipe respectively through two wire reels, the gather silk pipe deviates from the one side of wire reel on the table body of gather silk pipe is equipped with the translation mechanism along the length direction of table body sliding, fixed installation has the welding head for welding the free end of two silk threads on translation mechanism, the wire clamp for clamping two silk threads is also installed on translation mechanism, the lifting mechanism is equipped on the table body, and the scissors for cutting two silk threads between wire clamp and gather silk pipe are installed on lifting mechanism.

[0007] As further improvement, the wire pressing cylinder is installed on the table body, and the pressing plate for pressing two silk threads between gather silk pipe and wire reel is installed on the piston rod of wire pressing cylinder.

[0008] As a further improvement, a guide tube is fixedly installed on the platform, and the two strands of the wire pass through the guide tube, the bottom of the pressure plate, and the gathering tube in sequence.

[0009] As a further improvement, the wire gathering tube is driven by a control mechanism and moves along its axial direction; during welding, the control mechanism drives the wire gathering tube to move closer to the welding head, thereby shortening the length of the free end of the wire protruding from the wire gathering tube.

[0010] As a further improvement, the wire-gathering tube is a quartz tube.

[0011] As a further improvement, a visual inspection mechanism for detecting the solder joints of the two strands of wire is provided above the translation mechanism, and a wire gripper for clamping the two strands of wire cut by the scissors is also installed on the lifting mechanism. When the lifting mechanism rises, the wire gripper clamps the two strands of wire and sends the two strands of wire to the visual inspection mechanism.

[0012] As a further improvement, the welding head is a carbon rod.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] The ends of two wires in a figure-eight shape are brought together by the axial movement of the wire-gathering tube. The ends of the two wires are then spot-welded by the movement of the carbon rod. After the spot welding is completed, the wires are pulled out to a certain length by the wire-pulling clamp and cut by the scissors. Finally, the two wires that have been spot-welded are sent to the inspection camera by the wire-gripping claw to analyze and judge the weld point. The welding process does not require manual operation and has a high degree of mechanization, thereby improving welding efficiency. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;

[0017] Figure 2 This is a perspective view of an embodiment of the present utility model;

[0018] Figure 3 This is a schematic diagram of the translation mechanism and lifting mechanism according to an embodiment of the present utility model;

[0019] Figure 4 This is a schematic diagram of the installation box according to an embodiment of the present utility model;

[0020] Figure 5 This is a schematic diagram of the welding of two strands of wire.

[0021] In the diagram: 1-Stage; 2-Wire spool; 3-Wire gathering tube; 4-Wire; 5-Electric guide rail; 6-Electric slide table; 7-Carbon rod; 8-Wire drawing clamp; 9-Slide rod; 10-Crossbeam; 11-Mounting plate; 12-Scissors; 13-Mounting box; 14-Wire pressing cylinder; 15-Pressure plate; 16-Support platform; 17-Wire guide tube; 18-Guide sleeve; 19-Translation cylinder; 20-Adjusting plate; 21-Detection camera; 22-Wire gripper; 23-Lifting cylinder. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0023] like Figures 1 to 5 As shown, the automatic thermocouple wire hot junction welding machine includes a platform 1, which is a long strip extending laterally.

[0024] Two wire spool frames arranged side by side are fixed to the left end of the platform 1 by bolts, and wire spools 2 are rotatably mounted on the two wire spool frames. A wire gathering tube 3 is provided in the middle of the platform 1, extending laterally along the length of the platform 1. Two wires 4 are released from the two wire spools 2 and pass through the wire gathering tube 3 to the right. The wire gathering tube 3 serves to gather the two wires 4 together, so as to facilitate the subsequent spot welding of the free ends of the two wires 4.

[0025] like Figure 2 and Figure 3 As shown, a translation mechanism is provided on the platform 1 located to the right of the wire gathering tube 3, which slides laterally along the length of the platform 1. The translation mechanism includes a laterally extending electric guide rail 5 installed on the top of the platform 1, and an electric slide table 6 is slidably installed on the top of the electric guide rail 5. A welding head for welding the free ends of the two wires 4 is fixedly installed on the electric slide table by a bracket. The welding head is specifically a laterally extending carbon rod 7, which is connected to the negative electrode of the welding machine.

[0026] The electric slide table 6 is also bolted with a wire-pulling clamp 8 for clamping the two strands of wire 4 at the right end of the wire-pulling tube 3. The wire-pulling clamp 8 is located on the side of the carbon rod 7 near the wire-pulling tube 3, and its specific position can be an electric gripper. The platform 1 is equipped with a lifting mechanism, which is located above the end of the electric guide rail 5 near the wire-pulling tube 3. The lifting mechanism includes two sliding rods 9 arranged opposite each other, extending vertically. The lower ends of the sliding rods 9 are fixedly installed on the platform 1. The upper ends of the two sliding rods 9 are bolted to a crossbeam 10. A mounting plate 11 is slidably installed on the two sliding rods 9 below the crossbeam 10. The top of the crossbeam 10 is bolted to a lifting cylinder 23 with a piston rod extending downward. The mounting plate 11 is bolted to the piston rod of the lifting cylinder 23. The bottom of the mounting plate 11 is bolted to a pair of scissors 12 for cutting the two strands of wire 4 extending from the right end of the wire-pulling tube 3 between the wire-pulling clamp 8 and the wire-pulling tube 3. The scissors 12 can specifically be electric scissors.

[0027] like Figure 2 and Figure 4 As shown, a mounting box 13 is bolted to the platform 1 located between the wire gathering tube 3 and the two wire reels 2. Two strands of wire 4 pass through the mounting box 13. A wire pressing cylinder 14 is bolted to the top of the mounting box 13. The piston rod of the wire pressing cylinder 14 extends downward into the mounting box 13 and is fixedly mounted with a pressure plate 15 for pressing the two strands of wire 4 between the wire gathering tube 3 and the wire reels 2. A support platform 16 is provided on the inner side of the bottom wall of the mounting box 13 directly below the pressure plate 15. When the wire pressing cylinder 14 extends, it drives the pressure plate 15 to move downward, pressing the two strands of wire 4 tightly against the top of the support platform 16. The pressure plate 15 is a metal pressure plate, which is connected to the positive electrode of the welding machine during welding.

[0028] A guide tube 17 is bolted to the platform 1 located between the mounting box 13 and the two wire reels 2. The two wires 4 pass through the guide tube 17, the bottom of the pressure plate 15, and the wire gathering tube 3 in sequence. The guide tube 17 and the wire gathering tube 3 are coaxially arranged. By setting the guide tube 17, the wires 4 between the guide tube 17 and the wire gathering tube 3 are straighter, so that the pressure plate 15 can stably press down the wires 4.

[0029] The left side wall of the mounting box 13 is provided with an opening for the wire 4 to enter. The wire gathering tube 3 is driven by the control mechanism and moves along its axis. A guide sleeve 18 matching the wire gathering tube 3 is fixedly installed on the right side wall of the mounting box 13 by bolts. The wire gathering tube 3 is slidably sleeved in the guide sleeve 18. The control mechanism includes a translation cylinder 19 installed in the mounting box 13 by bolts. The piston rod of the translation cylinder 19 extends to the right outside the mounting box 13 and is fixedly installed with an adjusting plate 20 by bolts. The wire gathering tube 3 is snapped onto the adjusting plate 20.

[0030] During welding, the pressure plate 15 is connected to the positive electrode of the welding machine. Simultaneously, the wire-pressing cylinder 14 extends, causing the pressure plate 15 to press the two strands of wire 4 to be welded tightly against the top of the support platform 16, preventing the two strands of wire from moving when the wire-gathering tube 3 moves left or right. The translation cylinder 19 extends, causing the wire-gathering tube 3 to move to the right, closer to the carbon rod 7, shortening the length of the free end of the wire 4 extending through the right end of the wire-gathering tube 3. This allows the ends of the two strands of wire 4, which are shaped like an "8" at the opening of the wire-gathering tube 3, to be joined together. At the same time, a certain length of wire 4 is left at the right end of the wire-gathering tube 3 to await welding with the carbon rod 7. Figure 5 As shown, the electric slide 6 drives the wire drawing clamp 8 and the carbon rod 7 connected to the negative electrode of the welding machine to move to the left together. Initially, the distance between the two jaws of the wire drawing clamp 8 is greater than the diameter of the wire gathering tube 3. When the wire drawing clamp 8 and the carbon rod 7 move to the left, the wire drawing clamp 8 passes the right end of the wire gathering tube 3 to the left and the free ends of the two wires 4 touch the carbon rod 7, thus completing the spot welding.

[0031] After the spot welding is completed, the power supply of the welding machine is cut off. The translation cylinder 19 retracts, driving the wire gathering tube 3 to move to the left and return to its original position. At the same time, the wire pressing cylinder 14 retracts, driving the pressure plate 15 to release the wire 4. Then, the two jaws of the wire pulling clamp 8 close and clamp the two strands of wire 4 that have been spot welded at the right end of the wire gathering tube 3. The electric slide table 6 drives the wire pulling clamp 8 and the carbon rod 7 to move to the right together. The wire pulling clamp 8 pulls the wire 4 to the right by a certain length so that the two strands of wire 4 that have been spray welded can be cut to a fixed length. Finally, the lifting cylinder 23 extends, driving the mounting plate 11 to descend. The mounting plate 11 drives the scissors 12 to descend to the height of the wire 4. The scissors 12 cut the wire 4 that has been spot welded at the right end of the wire gathering tube 3.

[0032] In this embodiment, the wire gathering tube 3 is a quartz tube. Quartz tubes are highly heat-resistant and transparent and smooth, which reduces the resistance to the movement of the wires within the wire gathering tube 3.

[0033] Above the translation mechanism is a vision inspection mechanism for inspecting the solder joints of the two strands of wire 4. The vision inspection mechanism specifically includes an inspection camera 21, which is located on the right side of the lifting mechanism. The inspection camera 21 is connected to a controller and is fixedly mounted on the platform 1 via a gantry frame. The lifting mechanism is also equipped with a wire gripper 22 for clamping the two strands of wire 4 cut by the scissors 12. The wire gripper 22 is located on the side of the scissors 12 away from the wire gathering tube 3. The wire gripper 22 can also be an electric gripper. As the mounting plate 11 descends, it drives the scissors 12 and the wire gripper 22 to descend synchronously until they reach the height of the wire 4. First, the wire gripper 22 clamps the two strands of wire 4 located between the wire gathering tube 3 and the wire pulling clamp 8. Then, the scissors 12 cuts the wire 4 that has been spot-welded from the right end of the wire gathering tube 3. Finally, the wire pulling clamp 8 releases the wire 4, and the lifting cylinder 23 extends to drive the mounting plate 11 to rise and fall. The mounting plate 11 drives the scissors 12 and the wire gripper 22 to rise synchronously. The wire gripper 22 clamps the two strands of wire 4 that have been spot-welded and sends the wire 4 to the inspection camera 21. The inspection camera 21 analyzes and judges whether the weld point of the two strands of wire 4 is qualified.

[0034] 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. An automatic thermocouple wire hot junction welding machine, characterized in that: The device includes a long, narrow platform with two wire spools at one end and a wire-gathering tube extending along its length in the middle. Two strands of wire are released through the two wire spools and pass through the wire-gathering tube. A translation mechanism that slides along the length of the platform is located on the side of the wire-gathering tube away from the wire spools. A welding head for welding the free ends of the two strands of wire is fixedly installed on the translation mechanism. A wire-pulling clamp for clamping the two strands of wire is also installed on the translation mechanism. A lifting mechanism is provided on the platform, and scissors for cutting the two strands of wire between the wire-pulling clamp and the wire-gathering tube are installed on the lifting mechanism.

2. The automatic thermocouple wire hot junction welding machine as described in claim 1, characterized in that: A pressing cylinder is installed on the platform, and a pressure plate is installed on the piston rod of the pressing cylinder to press the two strands of the wire between the wire gathering tube and the wire spool.

3. The automatic thermocouple wire hot junction welding machine as described in claim 2, characterized in that: A guide tube is fixedly installed on the platform, and the two strands of the wire pass through the guide tube, the bottom of the pressure plate, and the gathering tube in sequence.

4. The automatic thermocouple wire hot junction welding machine as described in claim 1, characterized in that: The wire gathering tube is driven by a control mechanism and moves along its axial direction; during welding, the control mechanism drives the wire gathering tube to move closer to the welding head, thereby shortening the length of the free end of the wire that passes through the wire gathering tube.

5. The automatic thermocouple wire hot junction welding machine as described in claim 1, characterized in that: The wire-gathering tube is a quartz tube.

6. The automatic thermocouple wire hot junction welding machine as described in claim 1, characterized in that: Above the translation mechanism is a visual inspection mechanism for detecting the solder joints of the two strands of wire. The lifting mechanism is also equipped with a wire gripper for clamping the two strands of wire cut by the scissors. When the lifting mechanism rises, the wire gripper clamps the two strands of wire and sends them to the visual inspection mechanism.

7. The automatic thermocouple wire hot junction welding machine as described in claim 1, characterized in that: The welding head is a carbon rod.

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