Welding pressure head

Abstract

The utility model provides a welding pressure head, belongs to the technical field of welding, and solves the problem of low welding quality caused by the fact that argon cannot effectively isolate oxygen in the prior art. The device comprises an installation base, an installation through groove is vertically formed in the installation base, a guide sleeve and a pressing nozzle arranged on the outer side of the guide sleeve in a sleeving mode are installed in the installation through groove, a first annular groove is formed in the side wall of the pressing nozzle, and an air inlet communicated with the first annular groove is formed in the installation base; the inner wall of the pressing nozzle is provided with a second annular groove and an annular guide slope located below the second annular groove, the second annular groove is communicated with the first annular groove through a plurality of through holes, the annular guide slope and the outer wall of the guide sleeve form an air outlet gap, the bottom of the pressing nozzle is provided with a straight-through part, and the inner wall of the straight-through part is connected with the annular guide slope. Argon passes through the first annular groove and the second annular groove to form uniform airflow and form a uniform gas protection layer in a welding area, so that the welding position is prevented from being oxidized, and the welding quality is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of welding, and particularly relates to a welding tip. Background Art

[0002] Welding is a manufacturing process and technology for joining metals or other thermoplastic materials (such as plastics) by means of heating, high temperature or high pressure. In order to ensure the quality of the welded joint, argon gas is blown to the welded joint to avoid oxidation.

[0003] The existing welding tip will be provided with a gas buffer step on the inner wall of the straight-through part 703 as shown in Figure 2 , resulting in a large amount of argon gas being reflected by the gas buffer step and rushing out of the tip into the guide sleeve 2 before reaching the welding area, leading to waste of argon gas and poor welding quality due to ineffective oxygen isolation; moreover, the existing welding tip only connects one argon gas inlet hole, and when the argon gas moves towards the welding area, the formed gas protection layer is also uneven due to uneven pressure, resulting in external oxygen still entering the inner side of the gas protection layer to contact the welded joint and cause oxidation, affecting the welding quality. Summary of the Utility Model

[0004] Aiming at the above problems, the purpose of the utility model is to provide a welding tip, which is provided with a first annular groove to buffer the argon gas output from the inlet hole and form an annular air flow in the first annular groove. The annular air flow then enters the second annular groove evenly through several through holes to form an annular air flow again and directly reaches the welding area downward through the air outlet gap, effectively forming a uniform gas protection layer, thereby avoiding oxidation of the welded joint and improving the welding quality.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A welding tip includes a mounting base, a mounting through groove is vertically opened on the mounting base, a guide sleeve is installed in the mounting through groove, and a nozzle is sleeved outside the guide sleeve. A first annular groove is arranged on the side wall of the nozzle, an inlet hole communicated with the first annular groove is opened on the mounting base, a second annular groove and an annular guiding inclined surface located below the second annular groove are arranged on the inner wall of the nozzle. The second annular groove is communicated with the first annular groove through several through holes, the annular guiding inclined surface and the outer wall of the guide sleeve form an air outlet gap, and the bottom of the nozzle is provided with a straight-through part, and the inner wall of the straight-through part is connected with the annular guiding inclined surface.

[0007] Preferably, a first sealing washer is arranged in the mounting through groove and is attached to the upper end surface of the nozzle.

[0008] Preferably, an annular plate is connected to the outer wall of the guide sleeve, a second sealing washer is sleeved on the guide sleeve and is attached to the annular plate and the mounting base, and a sealing ring contacting the inner wall of the mounting base is sleeved on the outer wall of the nozzle and is located below the first annular groove.

[0009] Preferably, a first fixing screw vertically and movably penetrating through the annular plate and threadedly connected to the mounting base is provided.

[0010] Preferably, a second fixing screw horizontally threadedly penetrating through the side wall of the mounting base and extending into the first annular groove is provided.

[0011] Preferably, a notch is provided on the straight-through portion.

[0012] Preferably, the lower end of the straight-through portion protrudes from the lower surface of the mounting base.

[0013] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present utility model are as follows:

[0014] The first annular groove is provided to buffer the argon gas output from the air inlet hole and form an annular air flow therein. The annular air flow then uniformly enters the second annular groove through several through holes to form an annular air flow again and directly reaches the welding area downward through the air outlet gap, effectively forming a uniform gas protection layer, thereby preventing the welded part from being oxidized and improving the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 It is a top view structural schematic diagram provided by an embodiment of the present utility model;

[0017] Figure 2 For Figure 1 it is a cross-sectional structural schematic diagram taken along the line A-A in

[0018] Figure 3 For Figure 1 it is a cross-sectional structural schematic diagram taken along the line B-B in

[0019] Figure 4 It is a structural schematic diagram of the nozzle provided by an embodiment of the present utility model.

[0020] BRIEF DESCRIPTION OF THE DRAWINGS: 1 - mounting base; 2 - guide sleeve; 201 - annular plate; 3 - first fixing screw; 4 - second fixing screw; 5 - first sealing washer; 6 - second sealing washer; 7 - nozzle; 701 - through hole; 702 - first annular groove; 703 - straight-through portion; 704 - annular guiding inclined surface; 705 - second annular groove; 706 - sealing ring; 707 - notch; 8 - air inlet hole. Detailed implementation manners

[0021] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. Components of the embodiments of the present utility model usually described and illustrated in the accompanying drawings here can be arranged and designed in a variety of different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the protection scope of the present utility model.

[0023] In the description of the present utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship when the product of this application is usually placed. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0024] The following will be combined with Figures 1 - 4 to make a detailed description of the present utility model. Embodiment

[0025] A welding tip, as shown in Figure 1 、 2 and 4, includes a mounting base 1. A mounting through groove is vertically formed in the mounting base 1. A guide sleeve 2 and a nozzle 7 sleeved outside the guide sleeve 2 are installed in the mounting through groove. A first annular groove 702 is provided on the side wall of the nozzle 7. An air inlet hole 8 communicating with the first annular groove 702 is formed in the mounting base 1. A second annular groove 705 and an annular guiding inclined surface 704 located below the second annular groove 705 are provided on the inner wall of the nozzle 7. The second annular groove 705 communicates with the first annular groove 702 through several through holes 701. An air outlet gap is formed between the annular guiding inclined surface 704 and the outer wall of the guide sleeve 2. A straight-through portion 703 is provided at the bottom of the nozzle 7, and the inner wall of the straight-through portion 703 is connected to the annular guiding inclined surface 704.

[0026] The mounting base 1 is also connected to a lifting device (not shown in the figure), and the lifting device is connected to a moving device (not shown in the figure), so as to adjust the position of the indenter and assist in welding the welding joints at different positions. There are 4 through holes 701 provided in this application and they are evenly arranged along the circumferential direction of the nozzle 7.

[0027] The first annular groove 702 buffers the argon gas output from the air inlet hole 8 and forms an annular air flow in the first annular groove 702. The annular air flow then uniformly enters the second annular groove 705 through several through holes 701 to form an annular air flow again and passes downward through the air outlet gap to reach the welding area directly. Moreover, the gas buffer step is cancelled, and the argon gas can effectively form a uniform gas protection layer in the welding area, thereby avoiding oxidation of the welding joint and improving the welding quality.

[0028] A first sealing washer 5 that fits the upper end surface of the nozzle 7 is provided in the installation through groove. The first sealing washer 5 seals the gap between the nozzle 7 and the mounting base 1 above the first annular groove 702, avoiding argon gas from entering the area above the nozzle 7 from the gap and interfering with the air flow at the second annular groove 705, affecting the uniform flow of argon gas.

[0029] An annular plate 201 is connected to the outer wall of the guide sleeve 2. A second sealing washer 6 that fits the annular plate 201 and the mounting base 1 is sleeved on the guide sleeve 2. A sealing ring 706 that contacts the inner wall of the mounting base 1 is sleeved on the outer wall of the nozzle 7 and the sealing ring 706 is located below the first annular groove 702. The second sealing washer 6 seals the gap between the guide sleeve 2 and the mounting base 1, and the sealing ring 706 seals the gap between the nozzle 7 and the mounting base 1 below the first annular groove 702, thereby avoiding argon gas from overflowing from the indenter before reaching the welding area, causing waste of argon gas, and at the same time avoiding insufficient conveying pressure caused by argon gas leakage and preventing the argon gas from effectively reaching the welding area.

[0030] A first fixing screw 3 that is vertically movably penetrated through the annular plate 201 and is threadedly connected to the mounting base 1 is provided. The guide sleeve 2 is detachably connected to the mounting base 1 through the first fixing screw 3, facilitating subsequent disassembly and replacement of the guide sleeve 2.

[0031] As Figure 3 shown, a second fixing screw 4 that horizontally penetrates through the side wall of the mounting base 1 and extends into the first annular groove 702 is provided. The nozzle 7 is detachably installed on the mounting base 1 through the second fixing screw 4, facilitating subsequent disassembly and replacement of the nozzle 7; wherein the size of the second fixing screw 4 is smaller than the size of the first annular groove 702. When the nozzle 7 presses down the plate to be welded, the nozzle 7 can squeeze the first sealing washer 5 and generate a certain displacement, so that while the nozzle 7 presses the plate to be welded tightly, the plate to be welded will not be damaged due to excessive pressing force.

[0032] As Figure 2 and4 As shown, a notch 707 is provided on the straight-through portion 703. The straight-through portion 703 may not be provided with the notch 707, and the argon gas carrying the welding slag can be discharged from the guide sleeve 2 to the outside of the pressure head. In order to more effectively discharge the welding slag and avoid the welding slag affecting the welding quality, the notch 707 is provided so that the welding slag can be better removed from the straight-through portion 703.

[0033] The lower end of the straight-through portion 703 protrudes from the lower surface of the mounting base 1, and the straight-through portion 703 can better press on the area to be welded, so that argon gas can form a gas protection layer in the area to be welded, avoiding hard contact between the mounting base 1 and other areas of the plate to be welded and causing damage.

[0034] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A welding tip, comprising a mounting base (1), wherein a mounting through groove is vertically formed in the mounting base (1), a guide sleeve (2) and a nozzle (7) sleeved outside the guide sleeve (2) are mounted in the mounting through groove, and it is characterized in that, A first annular groove (702) is provided on the side wall of the nozzle (7). An air inlet hole (8) communicating with the first annular groove (702) is formed in the mounting seat (1). A second annular groove (705) and an annular guiding inclined surface (704) located below the second annular groove (705) are provided on the inner wall of the nozzle (7). The second annular groove (705) communicates with the first annular groove (702) through several through holes (701). An air outlet gap is formed between the annular guiding inclined surface (704) and the outer wall of the guiding sleeve (2). A straight-through portion (703) is provided at the bottom of the nozzle (7), and the inner wall of the straight-through portion (703) is connected to the annular guiding inclined surface (704).

2. The welding tip according to claim 1, wherein A first sealing washer (5) that fits against the upper end surface of the nozzle (7) is provided in the installation through groove.

3. A welding tip according to claim 1, characterized in that, An annular plate (201) is connected to the outer wall of the guiding sleeve (2). A second sealing washer (6) that fits against the annular plate (201) and the mounting seat (1) is sleeved on the guiding sleeve (2). A sealing ring (706) that contacts the inner wall of the mounting seat (1) is sleeved on the outer wall of the nozzle (7), and the sealing ring (706) is located below the first annular groove (702).

4. The welding head according to claim 3, characterized in that, A first fixing screw (3) that is vertically and movably penetrated through the annular plate (201) and is threadedly connected to the mounting seat (1) is provided.

5. A welding tip according to claim 1, wherein A second fixing screw (4) that horizontally penetrates through the side wall of the mounting seat (1) and extends into the first annular groove (702) is provided.

6. The welding head according to claim 1, characterized in that, A notch (707) is formed in the straight-through portion (703).

7. The welding tip according to claim 1, wherein The lower end of the straight-through portion (703) protrudes from the lower surface of the mounting seat (1).

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