AC / DC TIG welding arc voltage sampling system

Abstract

The utility model discloses an alternating-current and direct-current TIG welding arc voltage sampling system which comprises a control box, a control mainboard is fixedly arranged at the bottom of the inner side of the control box, a main control chip is fixedly arranged at the top end of the control mainboard, an arc voltage sampling circuit is arranged on the control mainboard, and the positive electrode of the arc voltage sampling circuit is connected with a first cable. A positive electrode interface of the arc voltage sampling circuit is connected with the workpiece through the first cable, a negative electrode interface of the arc voltage sampling circuit is connected with the tungsten electrode through the second cable, and one end, far away from the arc voltage sampling circuit, of the first cable extends to the outside to be connected with the workpiece. A second cable is arranged on the main control chip, an inductor is connected to the second cable, voltage at the end of a tungsten electrode and the end of a workpiece can be conveniently collected, the arc voltage precision can be accurately controlled, meanwhile, the arc voltage sampling circuit is not affected by the length of the cable from the welding power source end to the machine head end, and the main control chip controls the arc voltage sampling circuit through a ttl signal.

Description

Technical Field

[0001] The utility model relates to the technical field of AC / DC TIG welding arc voltage sampling, in particular to an AC / DC TIG welding arc voltage sampling system. Background Art

[0002] The power controllers on the market now collect the voltage at the output end of the welding power supply as the arc voltage. The voltage at the output end of the welding power supply = the cable voltage from the welding power supply to the machine head + the voltage at the end of the tungsten pole. Therefore, the collected arc voltage is not the true arc voltage, and due to the different lengths of the welding cables, the welding voltage is inconsistent.

[0003] In order to solve the above problems, an AC / DC TIG welding arc voltage sampling system is proposed here. Utility Model Content

[0004] The purpose of the utility model is to provide an AC / DC TIG welding arc voltage sampling system to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an AC / DC TIG welding arc voltage sampling system, comprising a control box, a control mainboard is fixedly arranged at the bottom of the inner side of the control box, a main control chip is fixedly arranged at the top of the control mainboard, an arc voltage sampling circuit is arranged on the control mainboard, the positive pole of the arc voltage sampling circuit is connected to a first cable, an end of the first cable away from the arc voltage sampling circuit extends to the outside and is connected to a workpiece, the negative pole of the arc voltage sampling circuit is connected to a second cable, an end of the second cable away from the arc voltage sampling circuit is fixedly connected to a tungsten electrode, an inductor is fixedly arranged in the middle of the second cable, and a display screen is fixedly installed on the front of the control box.

[0006] By connecting the positive interface of the arc voltage collection circuit to the workpiece through the first cable, connecting the negative interface of the arc voltage collection circuit to the tungsten electrode through the second cable, and connecting an inductor to the second cable, it is convenient to collect the voltage at the end of the tungsten electrode and the end of the workpiece, and the arc voltage accuracy can be accurately controlled without being affected by the length of the cable from the welding power supply end to the machine head end. The main control chip controls the arc voltage sampling circuit through the TTL signal.

[0007] Preferably, a sealing cover is provided at the top of the control box, and handles are fixedly provided on both sides of the sealing cover, so that the sealing cover can be easily removed by providing two handles.

[0008] Preferably, two connecting slots are provided at the connection between the control box and the sealing cover, and connecting blocks are provided inside the two connecting slots, and the two connecting blocks are fixedly connected to the sealing cover. The sealing cover can be conveniently installed on the control box by limiting the two connecting blocks and engaging with the two connecting slots respectively.

[0009] Preferably, the inner sides of the two connecting slots are provided with seating grooves, and the interiors of the two seating grooves are fixedly provided with limiting spring sheets, and one side of the two connecting blocks is provided with limiting grooves, and the two limiting spring sheets are respectively engaged with the two limiting grooves. The sealing cover can be further limited by the limiting engagement of the two limiting spring sheets with the two limiting grooves.

[0010] Preferably, a heat dissipation window is provided on one side of the control box, and a dustproof net is fixedly provided in the middle of the heat dissipation window, so that the heat dissipation of the control box is facilitated by the provision of the heat dissipation window.

[0011] Preferably, a threading seat is fixedly provided at the connection point between the control box and the first cable and at the connection point between the control box and the second cable. The threading seat can protect the first cable and the second cable.

[0012] Preferably, the main control chip is connected to the arc voltage sampling circuit TTL signal, the model of the main control chip is stm32f407, and the main control chip controls the arc voltage sampling circuit through the TTL signal.

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

[0014] By connecting the positive interface of the arc voltage collection circuit to the workpiece through the first cable, connecting the negative interface of the arc voltage collection circuit to the tungsten electrode through the second cable, and connecting an inductor to the second cable, it is convenient to collect the voltage at the end of the tungsten electrode and the end of the workpiece, and the arc voltage accuracy can be accurately controlled without being affected by the length of the cable from the welding power supply end to the machine head end. The main control chip controls the arc voltage sampling circuit through the TTL signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the utility model;

[0016] Figure 2 It is a front sectional view of the control box of the utility model;

[0017] Figure 3 It is an enlarged view of part A of the utility model;

[0018] Figure 4 It is the principle diagram of the utility model.

[0019] In the figure: 1. control box; 2. control main board; 3. main control chip; 4. first cable; 5. threading seat; 6. sealing cover; 7. limiting spring; 8. limiting groove; 9. display screen; 10. second cable; 11. inductor; 12. placement groove; 13. workpiece; 14. tungsten electrode; 15. heat dissipation window; 16. dustproof net; 17. handle; 18. connecting card slot; 19. connecting card block. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0021] See also Figure 1-4 The utility model provides an AC / DC TIG welding arc voltage sampling system, including a control box 1, a control mainboard 2 is fixedly arranged at the bottom of the inner side of the control box 1, a main control chip 3 is fixedly arranged at the top of the control mainboard 2, an arc voltage sampling circuit is arranged on the control mainboard 2, a positive pole of the arc voltage sampling circuit is connected to a first cable 4, an end of the first cable 4 away from the arc voltage sampling circuit extends to the outside and is connected to a workpiece 13, a negative pole of the arc voltage sampling circuit is connected to a second cable 10, an end of the second cable 10 away from the arc voltage sampling circuit is fixedly connected to a tungsten electrode 14, and the second cable An inductor 11 is fixedly arranged in the middle of 10, and a display screen 9 is fixedly installed on the front of the control box 1. The positive interface of the arc voltage acquisition circuit is connected to the workpiece 13 through the first cable 4, and the negative interface of the arc voltage acquisition circuit is connected to the tungsten electrode 14 through the second cable 10, and an inductor 11 is connected to the second cable 10, so as to facilitate the collection of the voltage at the end of the tungsten electrode 14 and the end of the workpiece 13, and the arc voltage accuracy can be accurately controlled without being affected by the length of the cable from the welding power supply end to the head end, and the main control chip 3 controls the arc voltage sampling circuit through the ttl signal.

[0022] A sealing cover 6 is provided at the top of the control box 1, and handles 17 are fixedly provided on both sides of the sealing cover 6. Two connecting card slots 18 are provided at the connection between the control box 1 and the sealing cover 6. Connecting card blocks 19 are provided inside the two connecting card slots 18, and the two connecting card blocks 19 are fixedly connected to the sealing cover 6. A placement groove 12 is provided on the inner side of the two connecting card slots 18, and limiting spring pieces 7 are fixedly provided inside the two placement grooves 12. A limiting groove 8 is provided on one side of the two connecting card blocks 19, and the two limiting spring pieces 7 are respectively connected to the two limiting grooves 8 by a card.

[0023] When in use, the sealing cover 6 can be easily removed by setting the two handles 17, the sealing cover 6 can be easily installed on the control box 1 by the two connecting blocks 19 and the two connecting slots 18, and the sealing cover 6 can be further limited by the two limiting spring sheets 7 and the two limiting slots 8.

[0024] A heat dissipation window 15 is provided on one side of the control box 1, a dustproof net 16 is fixedly provided in the middle of the heat dissipation window 15, a threading seat 5 is fixedly provided at the connection between the control box 1 and the first cable 4 and at the connection between the control box 1 and the second cable 10, the main control chip 3 is connected to the arc voltage sampling circuit TTL signal, and the model of the main control chip 3 is STM32F407;

[0025] When in use, the heat dissipation window 15 is provided to facilitate heat dissipation of the control box 1, and the threading seat 5 is provided to protect the first cable 4 and the second cable 10. The main control chip 3 controls the arc voltage sampling circuit through the ttl signal.

[0026] When the embodiment of the present application is in use: the positive interface of the arc voltage acquisition circuit is connected to the workpiece 13 through the first cable 4, the negative interface of the arc voltage acquisition circuit is connected to the tungsten electrode 14 through the second cable 10, and an inductor 11 is connected to the second cable 10, so as to facilitate the acquisition of the voltage at the end of the tungsten electrode 14 and the end of the workpiece 13, the arc voltage accuracy can be accurately controlled, and it is not affected by the cable length from the welding power supply end to the head end, and the main control chip 3 controls the arc voltage sampling circuit through the ttl signal. During DC TIG welding, the arc voltage sampling circuit collects DC arc voltage signals and dynamically controls the mechanical module in real time to keep the arc voltage stable. During AC TIG welding, the arc voltage sampling circuit collects AC arc voltage signals and dynamically controls the mechanical module in real time to keep the arc voltage stable.

[0027] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. An AC / DC TIG welding arc voltage sampling system, comprising a control box (1), characterized in that: A control mainboard (2) is fixedly arranged at the bottom of the inner side of the control box (1), a main control chip (3) is fixedly arranged at the top of the control mainboard (2), an arc voltage sampling circuit is arranged on the control mainboard (2), a positive pole of the arc voltage sampling circuit is connected to a first cable (4), an end of the first cable (4) away from the arc voltage sampling circuit extends to the outside and is connected to a workpiece (13), a negative pole of the arc voltage sampling circuit is connected to a second cable (10), an end of the second cable (10) away from the arc voltage sampling circuit is fixedly connected to a tungsten electrode (14), an inductor (11) is fixedly arranged in the middle of the second cable (10), and a display screen (9) is fixedly installed on the front of the control box (1).

2. The AC / DC TIG welding arc voltage sampling system according to claim 1, characterized in that: A sealing cover (6) is provided at the top end of the control box (1), and handles (17) are fixedly provided on both sides of the sealing cover (6).

3. The AC / DC TIG welding arc voltage sampling system according to claim 2, characterized in that: Two connection slots (18) are provided at the connection between the control box (1) and the sealing cover (6), and connection blocks (19) are provided inside the two connection slots (18), and the two connection blocks (19) are fixedly connected to the sealing cover (6).

4. The AC / DC TIG welding arc voltage sampling system according to claim 3, characterized in that: The inner sides of the two connection slots (18) are provided with a placement slot (12), the interiors of the two placement slots (12) are fixedly provided with a limiting spring sheet (7), and one side of the two connection blocks (19) is provided with a limiting slot (8), and the two limiting spring sheets (7) are respectively engaged and connected with the two limiting slots (8).

5. The AC / DC TIG welding arc voltage sampling system according to claim 1, characterized in that: A heat dissipation window (15) is provided on one side of the control box (1), and a dustproof net (16) is fixedly provided in the middle of the heat dissipation window (15).

6. The AC / DC TIG welding arc voltage sampling system according to claim 1, characterized in that: A threading seat (5) is fixedly provided at the connection point between the control box (1) and the first cable (4) and at the connection point between the control box (1) and the second cable (10).

7. The AC / DC TIG welding arc voltage sampling system according to claim 1, characterized in that: The main control chip (3) is connected to the arc voltage sampling circuit TTL signal, and the model of the main control chip (3) is STM32F407.

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