Welding gun cleaning device and vibration welding gun

Abstract

The utility model belongs to the technical field of welding gun cleaning, and provides a welding gun cleaning device and a vibration welding gun, the device is installed between a welding gun connecting rod and a nozzle and comprises a cylinder body and a piston arranged in the cylinder body in an up-down sliding mode, the upper end of the cylinder body is connected with the welding gun connecting rod in a sliding mode, and the lower end of the cylinder body is fixedly connected with the nozzle. The piston is fixedly arranged on the welding gun connecting rod in a sleeved mode, an inner cavity of the cylinder body is divided into an airtight chamber and a damping chamber through the piston, dynamic pressure difference changing from a positive value to a negative value in a circulating mode is arranged between the airtight chamber and the damping chamber, and the dynamic pressure difference drives the cylinder body to move up and down in a reciprocating mode in the axial direction of the piston so as to drive the nozzle to vibrate. The device is mounted on a welding gun body, occupies a small space, and is not easy to form interference at a narrow working position; and during cleaning, alignment is not needed, and only the piston needs to be driven to circularly reciprocate to drive the nozzle to continuously vibrate.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of welding gun cleaning, especially relates to a welding gun cleaning device and vibrating welding gun. BACKGROUND

[0002] The front end of the robot welding gun is generally a welding gun body, which usually comprises a welding elbow, a welding connecting rod, a conducting nozzle and a nozzle connector installed at the end of the welding elbow and a nozzle installed on the nozzle connector, and the nozzle is sleeved outside the conducting nozzle. The conducting nozzle is used for conducting current to the welding wire inserted in the conducting nozzle, and the nozzle is used for spraying protective gas. In the gas shielded welding process, welding spatter will quickly adhere to the outer surface of the conducting nozzle, the inner surface of the nozzle, the gas protection sleeve and the shunt device, and the protective gas flow flowing through the gas nozzle will be affected by the deposited welding slag, so that air can also reach the welding position, thereby affecting the protective gas flow, such as reducing the purity of the carbon dioxide protective gas flow, and further affecting the stability of the electric arc in the welding gun and the weld quality of the welded workpiece, and making the nozzle, shunt device and other devices more easily damaged. In addition, after a period of accumulation, the welding spatter can easily block the gas flow channel of the protective gas in the nozzle, thereby affecting the welding quality.

[0003] At present, the welding spatter is cleaned by the reamer cleaning method, that is, the reamer is inserted into the gap between the nozzle and the conducting nozzle, the reamer is driven to rotate by the motor, and the adhered welding slag is scraped off by the blade surface of the reamer. However, this method has the following defects: 1. A set of reamer device needs to be additionally provided to clean the welding gun, which occupies a large space, and if the robot welding gun is installed in a narrow working position, the reamer device is easy to interfere with the robot welding gun, and it is difficult to clean the welding gun; 2. During cleaning, the welding gun needs to be aligned with the position of the reamer, so the robot welding system needs to be programmed to align, and since there are various uncertainties in the production process, such as the deviation of the welding gun assembly, the change of the position of the reamer itself, the wear and deformation of the reamer, etc., which will affect the cleaning effect, and even cause damage to the machine parts during the strong cleaning process. SUMMARY

[0004] To solve the above technical problems, the utility model provides a welding gun cleaning device and vibrating welding gun.

[0005] The utility model discloses a welding torch cleaning device, which is installed between a welding torch connecting rod and a nozzle, and comprises a cylinder body and a piston slidingly arranged in the cylinder body.

[0006] Optionally, the airtight chamber is located at the lower part of the cylinder body, and the damping chamber is located at the upper part of the cylinder body.

[0007] Optionally, the airtight chamber is connected with a high-pressure fluid source, and the damping chamber is provided with an elastic member in a compressed state.

[0008] Optionally, the high-pressure fluid source comprises a high-pressure gas.

[0009] Optionally, the elastic member comprises a spring.

[0010] Optionally, the upper end of the cylinder body is fixedly provided with an end cover, and the end cover is slidingly sleeved on the outside of the welding torch connecting rod.

[0011] Optionally, the inner wall of the cylinder body is provided with a step below the piston, the small-diameter end of the step is the inner wall of the airtight chamber, the large-diameter end of the step is the inner wall of the damping chamber, the outer diameter of the piston is greater than the diameter of the small-diameter end of the step and less than the diameter of the large-diameter end of the step, and the damping chamber is in communication with the outside.

[0012] Optionally, the piston is integrally provided below with a stop ring having an outer diameter less than the diameter of the small-diameter end of the step, a sealing ring is arranged in the groove formed between the piston and the stop ring, and the outer diameter of the sealing ring is consistent with the diameter of the small-diameter end of the step.

[0013] Optionally, the device comprises a guide sleeve installed on the welding torch connecting rod below the stop ring, and the lower end of the cylinder body is slidingly connected with the guide sleeve.

[0014] Correspondingly, the utility model also provides a vibrating welding torch, which comprises a welding torch body, the welding torch body comprises a welding torch connecting rod, a conductive nozzle installed at the end of the welding torch connecting rod, a nozzle sleeved on the outside of the conductive nozzle, and the above welding torch cleaning device.

[0015] The utility model discloses a beneficial effect is: the utility model provides a welding torch cleaning device, set up piston in cylinder body and divide cylinder body into airtight chamber and damping chamber, the airtight chamber and damping chamber are equipped with dynamic pressure and make the dynamic pressure difference between both cyclic variation between positive value and negative value, the dynamic pressure difference of positive value is that the pressure of airtight chamber is greater than the pressure of damping chamber, the dynamic pressure difference of negative value is that the pressure of airtight chamber is less than the pressure of damping chamber, when airtight chamber and damping chamber are the dynamic pressure difference of positive value, airtight chamber drives cylinder body to move to airtight chamber direction, when airtight chamber and damping chamber are the dynamic pressure difference of negative value, damping chamber drives cylinder body to move to damping chamber direction, such cycle repeats, and cylinder body reciprocatingly moves along the piston shaft up and down, thereby driving the nozzle fixedly connected therewith reciprocatingly moves up and down to vibrate, thereby the welding slag adhered on the nozzle is vibrated and falls, the purpose of cleaning welding slag is achieved, and the problem that the nozzle is blocked by welding slag is solved.

[0016] On the other hand, the utility model also provides a arc welding torch, it is installed into integral whole with welding torch body with welding torch cleaning device, need not additional setting cleaning mechanism and can realize the self-cleaning of welding torch, simple structure, save space. BRIEF DESCRIPTION OF DRAWINGS

[0017] The utility model will be described further below in combination with the drawings and examples, and the drawings are as follows:

[0018] Figure 1 It is the structure schematic diagram of the welding torch cleaning device provided by the utility model;

[0019] Figure 2 It is the explosion drawing of the welding torch cleaning device provided by the utility model.

[0020] In the drawing: 1-welding torch connecting rod, 2-nozzle, 3-end cover, 4-cylinder body, 4.1-airtight chamber, 4.2-damping chamber, 4.3-air inlet, 5-guide sleeve, 6-retaining ring, 7-sealing ring, 8-spring, 9-piston, 10-conducting nozzle. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantage of the utility model more clear, the technical scheme in the utility model example will be described clearly and completely below in combination with the drawings in the utility model example, obviously, the described example is a part of the utility model, instead of all the examples. Based on the example in the utility model, all other examples obtained by the ordinary skill in the art without making creative labor belong to the range of the utility model protection.

[0022] In the description of the utility model, it needs to explain, the term "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and so on the orientation or position relation indicated is based on the orientation or position relation shown in the drawing, just is for the convenience of describing the utility model and simplifying the description, and is not indicate or imply that the device or element indicated must have a particular orientation, construct and operate in a particular orientation, therefore can not be understood as the limitation to the utility model. In addition, the term "first", "second" is only for the purpose of description, and can not be understood as indicating or implying relative importance.

[0023] In the description of the utility model, it needs to explain, unless otherwise clear and limited, the term "installation", "connection", "connect" should be broad sense, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be directly connected, also can be indirectly connected through the intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to specific circumstances. In addition, in the description of the utility model, unless otherwise stated, the meaning of "a plurality of", "several" is two or more than two.

[0024] As Figures 1-2 As shown in the utility model provides a kind of welding torch cleaning device, the device is installed between welding torch connecting rod 1 and nozzle 2, the device includes cylinder 4 and the piston 9 of upper and lower slidingly arranged in cylinder, the upper end of cylinder 4 is slidably connected with welding torch connecting rod 1, the lower end of cylinder 4 is fixedly connected with nozzle 2, piston 9 is fixedly sleeved on welding torch connecting rod 1, piston 9 separates the inner cavity of cylinder into airtight chamber 4.1 and damping chamber 4.2, a dynamic pressure difference that is cyclically changed from positive to negative is provided between airtight chamber 4.1 and damping chamber 4.2, the dynamic pressure difference drives cylinder 4 to reciprocate up and down along the axial direction of piston to drive nozzle 2 to vibrate. In the embodiment, the dynamic pressure difference of positive value means that the pressure of airtight chamber is greater than the pressure of damping chamber, and the dynamic pressure difference of negative value means that the pressure of airtight chamber is less than the pressure of damping chamber. When the dynamic pressure difference between airtight chamber and damping chamber is positive, the airtight chamber drives the cylinder to move towards the airtight chamber. When the dynamic pressure difference between airtight chamber and damping chamber is negative, the damping chamber drives the cylinder to move towards the damping chamber. Dynamic pressure is provided in airtight chamber and damping chamber, which can be provided by introducing fluid or setting compression spring.

[0025] In the utility model, the inner cavity of cylinder is separated into two chambers by piston, which can be upper chamber as airtight chamber and lower chamber as damping chamber, or upper chamber as damping chamber and lower chamber as airtight chamber. In one embodiment, as Figures 1-2As shown, the airtight chamber is located at the bottom of the cylinder block, and the damping chamber is located at the top of the cylinder block.

[0026] In one embodiment, such as Figures 1-2 As shown, in this embodiment, the airtight chamber is provided with dynamic pressure by a high-pressure fluid (preferably high-pressure gas). An air inlet 4.3 communicating with the airtight chamber can be opened on the outer wall of the cylinder. The damping chamber is provided with dynamic pressure by a compression elastic element. That is, the airtight chamber is connected to a high-pressure fluid source, and a compression elastic element is provided in the damping chamber. The elastic element is preferably a spring 8.

[0027] When the pressure in the airtight chamber is greater than the pressure in the damping chamber, the cylinder moves downwards along the piston axis because the piston is fixedly mounted on the welding torch connecting rod. At this time, the space in the damping chamber gradually decreases, and the spring is continuously compressed, causing the pressure in the damping chamber to gradually increase. When the pressure in the damping chamber increases to be greater than the pressure in the airtight chamber, the spring generates a reverse thrust, pushing the cylinder upwards along the piston axis until the pressure in the airtight chamber is greater than the pressure in the damping chamber. Then, the cylinder moves downwards again, and this cycle repeats, causing the cylinder to move back and forth, thus causing the nozzle to vibrate. Furthermore, because the damping chamber contains a compression spring with a natural frequency, and the fluid filling both the damping and airtight chambers is an elastic air column that can expand and compress, also possessing a natural frequency, the interaction between the two generates initial excitation. If the air column frequency couples with the natural frequency of the compression spring, resonance will occur, further increasing the nozzle vibration intensity.

[0028] In one embodiment, such as Figures 1-2 As shown, an end cap 3 is fixedly installed on the upper end of the cylinder body. The end cap 3 is slidably sleeved on the outside of the welding torch connecting rod. By setting the end cap, the sliding connection between the cylinder body and the welding torch connecting rod can be better realized.

[0029] In one embodiment, such as Figure 1 , Figure 2As shown, the inner wall of the cylinder is provided with a step below the piston, the small-diameter end of the step is the inner wall of the airtight chamber, the large-diameter end of the step is the inner wall of the damping chamber, the outer diameter of the piston is greater than the diameter of the small-diameter end of the step and smaller than the diameter of the large-diameter end of the step, and the damping chamber is in communication with the outside. In the embodiment, the inner wall of the cylinder is designed in a stepped shape, the piston can slide in the damping chamber and stop at the step, the piston is in close contact with the step to form a closed surface of the airtight chamber, in the initial position, the piston is in close contact with the step under the action of the compressed spring in the damping chamber, at this time, the airtight chamber is in a sealed state of not being in communication with the outside, high-pressure fluid is introduced into the airtight chamber, the pressure in the airtight chamber gradually increases, the cylinder is pushed to move downward when the pressure in the airtight chamber increases, the piston is separated from the step, the airtight chamber is in communication with the outside through the damping chamber, the pressure in the airtight chamber is released, at this time, the spring in the damping chamber is compressed, the pressure in the damping chamber gradually increases, when the reverse damping force generated by the damping chamber is greater than the pressure of the airtight chamber, the cylinder is pushed to move reversely upward, when the cylinder moves to the step surface in close contact with the piston, the airtight chamber is sealed again, the airtight chamber is recharged, and the next cycle is performed.

[0030] In one embodiment, as shown in Figure 1 , Figure 2 As shown, the lower part of the piston is integrally provided with a stop ring 6 with an outer diameter smaller than the diameter of the small-diameter end of the step, and a sealing ring 7 is installed in the groove formed between the piston and the stop ring, and the outer diameter of the sealing ring is consistent with the diameter of the small-diameter end of the step. When the step moves to be in close contact with the piston, the small-diameter end of the step is in close contact with the sealing ring, so that the sealing property of the airtight chamber can be ensured.

[0031] In one embodiment, as shown in Figure 1 , Figure 2 As shown, the device comprises a guide sleeve 5 installed on the welding gun connecting rod below the stop ring, the lower end of the cylinder is in sliding connection with the guide sleeve 5, and the cylinder is in sliding connection with the welding gun connecting rod through the guide sleeve, so that the surface of the welding gun connecting rod can be protected.

[0032] Correspondingly, as shown in Figures 1-2 The utility model also provides a vibrating welding gun, which comprises a welding gun body, the welding gun body comprises a welding gun connecting rod 1, a conductive nozzle 10 installed at the end of the welding gun connecting rod, a nozzle 2 sleeved outside the conductive nozzle and the above-mentioned welding gun cleaning device, the upper end of the cylinder 4 is in sliding connection with the welding gun connecting rod 1, the lower end of the cylinder 4 is fixedly connected with the nozzle 2, and the piston 9 is fixedly sleeved on the welding gun connecting rod 1.

[0033] Finally, it should be noted that: the above examples are used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should all belong to the protection scope of the claims of the present application.

Claims

1. A torch cleaning device, characterized by, The device is installed between the welding gun connecting rod and the nozzle, and comprises a cylinder and a piston slidingly arranged in the cylinder, the upper end of the cylinder is slidingly connected with the welding gun connecting rod, the lower end of the cylinder is fixedly connected with the nozzle, the piston is fixedly sleeved on the welding gun connecting rod, the piston separates the inner cavity of the cylinder into a gas-tight chamber and a damping chamber, a dynamic pressure difference which cyclically changes from a positive value to a negative value is arranged between the gas-tight chamber and the damping chamber, the dynamic pressure difference drives the cylinder to reciprocate along the piston in the axial direction to drive the nozzle to vibrate.

2. The torch purging device of claim 1, wherein, The gas-tight chamber is located at the lower part of the cylinder, and the damping chamber is located at the upper part of the cylinder.

3. The torch cleaning device of claim 1, wherein, The gas-tight chamber is connected with a high-pressure fluid source, and the damping chamber is provided with an elastic member in a compressed state.

4. The torch cleaning device of claim 3, wherein, The high-pressure fluid source comprises a high-pressure gas.

5. The torch cleaning device of claim 3, wherein, The elastic member comprises a spring.

6. The torch cleaning device of claim 1, wherein, The upper end of the cylinder is fixedly provided with an end cover, and the end cover is slidingly sleeved outside the welding gun connecting rod.

7. The torch purging device of claim 1 or 2 or 3, wherein, The inner wall of the cylinder is provided with a step below the piston, the small-diameter end of the step is the inner wall of the gas-tight chamber, the large-diameter end of the step is the inner wall of the damping chamber, the outer diameter of the piston is greater than the diameter of the small-diameter end of the step and smaller than the diameter of the large-diameter end of the step, and the damping chamber is in communication with the outside.

8. The torch cleaning device of claim 7, wherein, The lower part of the piston is integrally provided with a stop ring with an outer diameter smaller than the diameter of the small-diameter end of the step, a sealing ring is arranged in the groove formed between the piston and the stop ring, and the outer diameter of the sealing ring is consistent with the diameter of the small-diameter end of the step of the cylinder.

9. The torch cleaning device of claim 7, wherein, The device comprises a guide sleeve which is installed on the welding gun connecting rod below the stop ring and is in sliding connection with the lower end of the cylinder.

10. A vibration welding horn comprising a horn body, the horn body comprising a horn link, a conductive tip mounted at the end of the horn link, and a nozzle sleeve fitted over the conductive tip, wherein, The welding gun body further comprises the welding gun cleaning device according to any one of claims 1-9.

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