• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    CONTACT TIP AND HIGH PERFORMANCE NOZZLE SET WITH IMPROVED COOLING FOR USE IN AN ARC WELDING EQUIPMENT The present invention relates to a consumable set for use in an arc welding apparatus that includes a nozzle assembly that it has a nozzle body (100), an insulator (92) disposed within the nozzle body (1000) and a nozzle insert (94) disposed within the insulator (92). The nozzle insert (94) includes an internal gas diverter (110, 112). A contact tip (24) is arranged within the nozzle assembly and includes at least one opening that extends from an external portion to an internal cavity, an exit orifice, a distal end face and an external surface that extends between at least one opening and the distal end portion of the contact tip (24). The internal gas diverter directs a flow of protective gas out of at least one opening along the outer surface of the contact tip (24), and a major distance of at least one opening to the distal end face is varied to adjust protective gas flow for improved cooling
    公开号:BR112016010493B1
    申请号:R112016010493-5
    申请日:2014-11-13
    公开日:2021-02-02
    发明作者:Khalid Hassan
    申请人:Victor Equipment Company；
    IPC主号:
    专利说明:

    FIELD
    [001] The present invention relates generally to welding apparatus, and more particularly to arc welding apparatus such as Metal Inert Gas (MIG) or Gas Metal Arc Welding (GMAW) guns, including consumable components to generate a welding arc and diffuse a protective gas. BACKGROUND
    [002] The statements in this section provide merely background information related to the present invention and may not constitute the prior art.
    [003] In an arc welding apparatus, such as Metal Inert Gas (MIG) or Gas Metal Arc Welding (GMAW), a welding wire is fed through the welding gun to provide a pool of molten metal for join the metal work pieces together. An inert gas is directed through the front (distal) end of the welding gun to provide a surrounding layer or protective gas blanket to protect the molten metal pool from atmospheric contamination. Inert gas is typically a combination of several gases, such as argon or helium, among others.
    [004] An earlier MIG or GMAW welding gun technique typically includes a contact tip and a gas diffuser connected to the contact tip. The contact tip has a central hole to guide the welding wire to the workpieces. The contact tip transfers the electric current to the welding wire. The contact tip is typically threaded on the gas diffuser and the gas diffuser defines the gas passages that direct the protective gas around the contact tip. The contact tip and gas diffuser are constantly subjected to high heat and are susceptible to wear due to operation at high temperatures. A nozzle assembly surrounds the contact and the gas diffuser. The nozzle assembly also directs the protective gas to the workpieces to cover the pool of molten metal. SUMMARY
    [005] The present invention generally provides a contact tip / diffuser configuration for an arc welding apparatus, such as a MIG or GMAW welding gun with an increased consumable component life. The various forms of the present invention provide a simplified structure, a more uniform heat distribution and improved cooling to increase the life of consumable components, among other benefits.
    [006] In one form, a consumable assembly is provided for use in an arc welding apparatus comprising a nozzle assembly having a nozzle body, an insulator disposed within the nozzle body, and a nozzle insert disposed within of the insulator. The nozzle insert comprises an internal gas diverter and a seating surface. A contact tip is disposed within the nozzle assembly and defines a shoulder that engages the seat surface of the nozzle insert. The contact tip also comprises a body that defines an internal cavity that extends from a proximal end portion to a distal end portion, in which at least one opening extends from an external portion of the body to the internal cavity, an orifice outlet that extends through the distal end portion of the body, to a distal end face, and an outer surface that extends between at least one opening and the distal end portion of the body. The internal gas diverter directs a flow of protective gas out of at least one opening along the outer surface of the contact tip, and a primary distance of at least one opening to the distal end face is varied to adjust the flow of protective gas for improved cooling.
    [007] In another form, a method of cooling a contact tip is provided for use in an arc welding apparatus which comprises directing a flow of protective gas into an internal cavity of the contact tip of a portion of proximal end to a distal end portion, directing the protective gas flow through at least one opening formed through a contact tip body, and diverting the protective gas flow with a component adjacent to the contact tip along from an external surface of the contact tip to the distal end portion. The flow of protective gas into the internal cavity through at least one opening and around the outer surface of the contact tip improves the cooling of the contact tip, and a primary distance of at least one opening to a distal end face of the contact tip. contact is varied to adjust the flow of protective gas for improved cooling.
    [008] In yet another form, an arc welding apparatus is provided comprising a handle, a conductive tube attached to the handle, a welding cable that conducts the welding current, a protective gas, and a welding wire of a power supply, where the welding cable is connected to the handle, and a consumable set attached to the conductor tube. The consumable assembly comprises a nozzle assembly that has a nozzle body, an insulator disposed within the nozzle body, and a nozzle insert disposed within the insulator. The nozzle insert comprises an internal gas diverter and a seating surface. A contact tip is disposed within the nozzle assembly and defines a shoulder that engages the seat surface of the nozzle insert. The contact tip also comprises a body that defines an internal cavity that extends from a proximal end portion to a distal end portion, at least one opening that extends from an external portion of the body to the internal cavity, a exit orifice extending through the distal end portion of the body, a distal end face and an outer surface extending between at least one opening and the distal end portion of the body. The internal gas diverter directs a flow of protective gas out of at least one opening along the outer surface of the contact tip, and a primary distance of at least one opening to the distal end face is varied to adjust the gas flow protector for improved cooling.
    [009] Other areas of applicability will become apparent from the description provided in this document. It should be understood that the description and specific examples are for illustrative purposes only and are not intended to limit the scope of the present invention. GRAPHICS
    [0010] The drawings described in this document are for illustration purposes only and are not intended to limit the scope of the present invention in any way.
    [0011] Figure 1 is a perspective view of an arc de-soldering apparatus constructed in accordance with the teachings of the present invention;
    [0012] figure 2A is a front perspective view of a contact point constructed in accordance with the teachings of the present invention;
    [0013] figure 2B is a rear perspective view of a contact point constructed in accordance with the teachings of the present invention;
    [0014] figure 3 is a side view of various shapes of the contact tip constructed in accordance with the teachings of the present invention;
    [0015] figure 4A is a side cross-sectional view of the contact tip constructed in accordance with the teachings of the present invention;
    [0016] figure 4B is a cross-sectional view of the end of the contact tip, taken along line A-A of figure 4A, and constructed in accordance with the teachings of the present invention;
    [0017] figure 5 is a partial perspective view of the contact tip disposed within a nozzle assembly constructed in accordance with the teachings of the present invention;
    [0018] figure 6 is a side cross-sectional view of the contact tip and the nozzle assembly of figure 5;
    [0019] figure 7 is a flow chart illustrating a method in accordance with the teachings of the present invention; and
    [0020] figure 8 is a graph showing experimental test data for operating temperature versus duty cycle for a standard welding contact tip (when using a 16 gauge welding wire) versus a shape of the contact tip of the present invention. DETAILED DESCRIPTION
    [0021] The following description is of an exemplary nature only and is not intended to limit the present invention, application or uses. It should be understood that in all drawings, the corresponding reference numerals indicate identical or corresponding parts and elements. Although the terms "MIG" and "GMAW" are used within the specification, it should be understood that the teachings of the present invention apply to any type of welding or cutting apparatus.
    [0022] With reference to figure 1, an arc welding apparatus, such as a MIG or GMAW welding gun, is illustrated and generally indicated by reference numeral 10. The welding gun includes a handle 12, a tube conductor 14 attached to handle 12, and a consumable set 16 attached to conductive tube 14. Handle 12 is connected to a welding cable 18 that conducts the welding current, protective gas and a welding wire 20 from a power supply (not shown), a gas source (not shown) and a wire feeder (not shown) for the welding gun 10.
    [0023] Consumable set 16 includes a plurality of consumable components including a nozzle set 22 and a contact tip 24 (contact tip 24 is shown in the following figures). The structure and operation of an exemplary arc welding apparatus has been disclosed in U.S. Patents no. 5,491,321 and 5,338,917, which are jointly owned by the assignee of this patent application, and whose content is incorporated by reference in this document in its entirety.
    [0024] The consumable assembly 16 is connected to a distal end portion 26 of the conductive tube 14. The nozzle assembly 22 is substantially cylindrical in shape and receives the distal end portion 26 of the conductive tube 14 therein. The contact tip 24 is coaxially disposed within the nozzle insert 22 and can be attached to it as illustrated and described in copending U.S. Patent Application no. serial number 13 / 674.829 entitled "Contact Tip - Hollow Diffuser for Manual GMAW Guns / Robotic Arc Welding MIGs", which is the common ownership of the assignee of this patent application, and the content of which is incorporated by reference in this document in its entirety. An additional construction and operation of an exemplary arc welding apparatus to which the teachings of the present invention can be applied are also described in more detail in the aforementioned copending patent application.
    [0025] With reference to figures 2 to 4, various shapes of the contact tip 24 according to the present invention are now illustrated and described in more detail. The contact tip 24 has a body 30 that defines an internal cavity 32 that extends from a proximal end portion 34 to a distal end portion 36. Contact tip 24 has a distal end face 38 and an exit hole 39 extending through the distal end portion 36 of the body 30 and the distal end face 38. Advantageously, the contact tip 24 is designed to function both as a contact tip to transfer electrical current to the welding wire and a gas diffuser to diffuse protective gas around the molten metal pool, thereby providing a dual function while eliminating an additional component (i.e., a separate gas diffuser) from the consumable assembly 16.
    [0026] As shown in figure 3, the length and configuration of the contact tips 24 can vary depending on the application parameters such as the amperage, the wire diameter, the duration of a welding operation, the operating temperature, among other parameters associated with the application of environmental and specific welding and the welding process such as, for example, short arc, globular, spray transfer and pulse. In addition, the length and configuration of the contact tips 24 can provide customization and improve the flow of protective gas and the cooling of the contact tip 24 together with the cir-coveting nozzle assembly 22 for a specific welding operation. As shown, a shorter contact tip 24 is used, for example, in a light work application, the contact tip in the center 24 'for a medium work application, and the contact tip 24 "at the bottom for a heavy duty application. Typically, the duty cycle is determined by the duration of the welding operation and the amperage used during the continuous operation of the welding gun. For example, a light duty application can be considered as those welding operations that are rated and use about 250 amps or less. An average work application can be thought of as welding operations with a range of about 250 amps to about 350 amps, and a heavy-duty application is generally 350 amps or more.
    [0027] With reference now to figure 4A, the contact tip 24 according to a form of the present invention is also defined as having three sections, 40, 50 and 60. The first section 40 includes a spherical tapered end portion 42 for connect to a corresponding spherical tapered seat of a conductive tube (indicated above). Although a spherical tapering geometry is shown, several other geometries can be used as a tapered or polygonal configuration for the contact connection between the contact tip 24 and a corresponding component such as a conductive tube. The spherical tapered end 42 tapers out from the proximal end 34 to the distal end portion 36. The first section 40 also defines a shoulder 44 as shown. Second section 50 is generally cylindrical and, in one form, defines at least one opening 52 that extends through the body 30 towards the internal cavity 32. Although opening 52 is shown in a rectangular / slotted configuration, it should be understood that any shape Geometric, such as, for example, round, oval, polygonal, can be employed while remaining within the scope of the present invention. In addition, the openings 52 can be normal to an external surface 25 of the contact tip 24 or the openings 52 can be folded in order to introduce a swirling action to the protective gas while remaining within the scope of the present invention. Additional details and the function of the openings 52 are indicated in the copending U.S. Patent Application no. serial number 13 / 674.829 entitled "Hollow Contact-Diffuser Tip for Manual GMAW Guns / Robotic Arc Welding MIGs", which has been incorporated by reference above in this document.
    [0028] A third section 60 in a shape is tapered and, more specifically, tapered at an interior angle to the distal end face 38 as shown. The third section 60 in this form is tapered distally to a taper angle 62 of the second section 50 to the distal end face 38. The third section 60 can also include variations of the taper angle 62 to accommodate application variables such as the hole diameter. outlet 39 of the contact tip 24 or a diameter of the welding wire. As an example, in a form of the present invention, the taper angle 62 varies between about 0 and 10 degrees. It should be understood that the length and / or configuration of each section 40, 50, 60 of the contact tip 24 may vary according to the specific welding application, such as, for example, an extended tapered section 60 to reach locations small / tight welding rods, or a constant diameter contact tip throughout the second and third sections, 50, 60.
    [0029] As previously indicated, the contact tip 24 includes at least one opening 52 that extends through the body 30 of the contact tip 24 towards the internal cavity 32. The contact tip 24 is designed to direct the protective gas towards the internal cavity 32 in the proximal end portion 34, and then out through the openings 52 to the distal end portion 36, along an outer surface 25 of the contact tip 24. The characteristics of the protective gas flow will vary with the shape and position of the openings 52.
    [0030] With respect more specifically to figures 4A and 4B, in one form, the contact tip 24 has four openings 52 which are spaced equally as shown. Each of the openings 52 in this form consists of notches of generally rectangular shape which are also defined by the arcuate notches 70 in the body 30 of the contact tip 24. The arcuate notches 70 form the guide surfaces 72 defined by a radius R1 on both sides of the opening 52 leading to the internal cavity 32. The arcuate shape of the guide surfaces 72 directs the protective gas to a characteristic desired flow outside the opening 52 of the contact tip 24. The openings 52 can be any shape and the guide surfaces 72 also they can be adjusted and varied in order to change the characteristics of the protective gas flow for various applications. The number of openings 52 and their spacing can further be modified to obtain a desired diffuse flow of the protective gas. In one form, the total cross-sectional area of the openings 52 is more or less equal to the total cross-sectional area of the gas inserted in the welding cable 18 in a supply pin or in outlet holes (not shown). In this way, the openings 52 are designed so that the area in total cross section does not restrict the flow of protective gas beyond the restriction of the supply pin or disconnection of the gas source (not shown). In addition, the arcuate cuts 70 can be of rays of various sizes R1. The size of the arcuate notches 70, however, is generally sized to balance the desired conduction heat transfer properties between the tip sections 24 and the desired gas flow characteristics created by the guide surfaces 72 when the protective gas exits. of the openings 52. In the illustrated form, the R1 radii are about 0.39 cm (5/32 inch).
    [0031] With respect again to figure 4A, the flow of protective gas through the openings 52 can also be modified by varying the location of the openings 52 along the body 30 of the contact tip 24. In one way, the openings 52 are located at a main distance 80 measured from a distal edge 82 of the openings 52 to the distal end face 38. The main distance 80 can be advantageously varied to adjust the flow and cooling effect of the protective gas around the contact tip 24, together with characteristics of the protective gas flow leaving the nozzle assembly 22. The main distance 80 between the openings 52 and the distal end face 38 is at least a minimum distance to obtain the desired flow of the protective gas and the effectiveness of the protective gas to cover the weld pool during the welding operation. The location of the openings 52 in relation to the distal end face 38 allows to modify the desired flow characteristics for each contact tip 24, to adjust operational variables, such as, for example, a flow volume or protective gas flow pattern of the inner cavity 32. In one form, the main distance 80 is the minimum distance of about 2.03 cm (0.8 inch) for the protective gas to obtain laminar flow properties along the outer surface 25 of the contact tip 24 It should be understood that the main distance 80 varies and could be greater or less than this value for different operating conditions, such as the size of the contact tip, the flow volume and other specific parameters for the welding application.
    [0032] The taper angle 62 can also be modified to obtain a desired wall thickness 27 of the contact tip 24, close to the distal end portion 36. The contact tip 24 and the desired wall thickness 27 can vary based on outlet orifice diameter 39 or the welding wire gauge. The wall thickness 27 is suitable for the transfer of heat through the contact tip 24 and in some instances it can dictate the tapering angle 62, for example, with an outlet hole 39 of a larger diameter. Insufficient wall thickness 27 can lead to increased / excessive local temperatures near the distal end portion 36 and a life with premature / decreased degradation of the contact tip 24, and more specifically a melting or bonding of the welding wire within the tip. contact 24. Therefore, to prevent premature degradation, the wall thickness 27 of the contact tip 24 defines a minimum thickness that is dependent on the duty cycle and the amp rating of the welding operation. For example, in one form, the contact tip 24 for the heavy-duty application dictates that the wall thickness 25 is about 0.30 cm (0.12 inch). In another form, the contact tip 24 for a medium work application dictates that the wall thickness 27 is about 0.20 cm (0.08 inch). Additional modifications may include adjusting the length of the second section 59 and the third section 60 to maintain the desired wall thickness 27 for a given gauge of the welding wire. For example, in a case where a large gauge welding wire is used, the outlet hole 39 should be larger and the standard taper angle 62 may result in a wall thickness 27 that is too thin. Therefore, the taper angle 62 can still be changed to maintain the desired wall thickness 27 of the contact tip 24.
    [0033] With respect to figures 5 and 6, the nozzle assembly 22 includes the nozzle body 90 which is generally cylindrical in shape, an insulator 92 and a nozzle insert 94. As shown, the nozzle body 90 extends from a proximal opening 96 to a distal opening 98. The nozzle body 90 may also include a nose portion 100 which may or may not narrow / extend inward to properly direct the protective gas for a particular application. The mouthpiece insert 94 has a proximal end portion 102 and a distal end portion 104 and includes a central hole 106 that extends from the proximal end portion 102 to the distal end portion 104. The mouthpiece insert 94 in its portion the distal end 104 defines an internal gas diverter 110. The internal gas diverter 110 also defines a seating surface 112 for the proximal end portion 102 of the nozzle insert 94. The seating surface 112 is chamfered, in a shape, to engage the shoulder 44 of the contact tip 24. (The shoulder 44 of the contact tip 24 is shown spaced from the seating surface 112 to illustrate these features in detail). As also shown, the internal gas diverter 110 defines a profiled diverter orifice 120 that extends distally from the central hole 106.
    [0034] The nozzle body 148 may also include an internal diverter surface 130 also for directing the protective gas coming out of the openings 52 of the contact tip 24. In this way, the flow of protective gas is directed by the internal diverter surface 130 within a section converging 132 towards a throat 134, and then the protective gas enters a divergent section 136 of the body 148 of the nozzle. In this form, the divergent section 136 has an increasing diameter of the throat 134 for a distal opening 98 of the body 90 of the nozzle. The nozzle body 90 including the converging section 132 and the divergent section 136 results in flow characteristics that are more laminar when they leave the distal opening 98. In addition, the divergent section 136 directs the protective gas out of the distal opening 98 to vent outward, extending the protective gas cover over the weld pool during the operation of the welding gun 10. The convergent and divergent sections 132, 136 are designed to further improve and customize the characteristics of the protective gas flow for the operation of the welding gun. gem-specific welding. The lengths, diameters and interior geometry of the nozzle body 90 can include various permutations to allow the protective gas to be optimized for a specific and environmental welding operation. For example, divergent section 136 may extend at a greater angle from throat 134, also directing protective gas to greater ventilation outside distal opening 98. Alternatively, divergent section 136 may extend at or near it diameter as the throat 134, thereby directing the protective gas in a narrower ventilation that comes out of the distal opening 98.
    [0035] As also shown, the design of the contact tip 24 and the third section 60 can also include several application-specific designs to control a spacing 150 between the body 148 of the nozzle and the outer surface 25 of the contact tip 24 in order to control the flow of protective gas in it. The spacing can be normal to the external surface 25 of the contact 24 and can also be located in any position along the length of the contact tip 24.
    [0036] As shown in figures 5 and 6, the profiled diverter hole 120 of the nozzle insert 94 extends around the openings 52 of the contact tip 24. The gas flow, indicated by the dashed arrows F, is directed distally through from the inner cavity 32 of the contact tip 24, and then radially outward through the openings 52. The profiled diverter orifice 120 then directs the flow of gas out of the openings 52 distally around the outer surface 25 of the contact tip 24 as shown. The profiled diverter orifice 120 can span various lengths of a contact seat 160 and include a variety of geometries, in addition to the chamfered configurations as illustrated in this document. Alternatively, the profiled diverter orifice 120 can extend to any angle that will change the direction of the protective gas to improve the flow characteristics or cool the contact tip 24 and the surrounding nozzle assembly 22. For example, such flow characteristics may include laminar flow along the length of the contact tip 24.
    [0037] With reference to figure 7, the present invention also includes a method for cooling the contact tip 24 which includes a first step 200 of directing the protective gas so that it flows into the internal cavity 32 of the contact tip 24. A second step 202 includes directing the flow of protective gas from the internal cavity 32 through at least one opening 52 toward the external surface 25 of the contact tip 24. A third step 204 provides cooling of the contact tip 24 by directing the flow of protective gas to and through the inner cavity 32 and around the outer surface 25 of the contact tip 24. The cooling also includes a conduction heat transfer and a convection heat transfer to reduce the operating temperature of the contact tip 24 and the total consumable assembly 16.
    [0038] The cooling method and the design of the contact tip24 in combination with the nozzle assembly 22 can also reduce the temperature by changing the volume of the gas flow, for example, with a different opening shape or number of openings 52 different. Another aspect for the cooling of the contact tip 24 involves the transfer of conduction heat inside the welding gun 10. Therefore, variations in the contact area between the contact tip 24 and the seat inside the conductor tube can also provide the cooling of the contact tip 24 by changing the conduction heat transfer to the conductor tube. Variations in the spherical taper end 42 and the spherical tapered seat of the conductive tube can also reduce the operating temperature and thermal effects of the welding operation to improve the life of the contact tip 24 and the total consumable set 16.
    [0039] When testing various forms of the present invention, the operating temperature of the contact tip 24 has been reduced by more than 30%. This reduced operating temperature increases the total life and also reduces the adhesion of the weld spatter on the contact tip 24.
    [0040] With respect to figure 8, the results of the tests that demonstrate the lowest operating temperature for the present invention, which used the following welding parameters in Table 1 below, are illustrated. Table 1: Welding parameters for tests

    [0041] The tests included a total of six (6) rounds when using the above welding parameters. Three (3) rounds used a conventional welding tip, and the operating temperatures for each of these three (3) rounds are indicated by lines 224. Another three (3) rounds used the contact tip 24 and the nozzle body assembly 22 according to the present invention, for a heavy-duty application, and the operating temperatures for each of these runs are indicated by lines 222. These tests demonstrated that the operating temperature of the contact tip 24 in accordance with the teachings of the present invention it was more than 148.89 ° C (300 ° F) cooler than a conventional contact tip, as shown in Table 2 below. Table 2: Average Maximum Temperature

    [0042] The present invention is merely exemplary in nature and, therefore, variations that do not deviate from the nature of the disclosure must be within the scope of the present invention. Such variations should not be considered as departing from the scope contemplated in the present invention.
    权利要求:
    Claims (13)
    [0001]
    1. Consumable set (16) for use in an arc welding apparatus (10), characterized by the fact that it comprises: a nozzle set (22) comprising a nozzle body (90), an insulator (92) disposed within the nozzle body (90), and a nozzle insert (94) disposed within the insulator (92), wherein the nozzle insert (94) comprises an internal gas diverter (110) and a seating surface ( 112); and a contact tip (24) disposed within the nozzle assembly (22), where the contact tip (24) defines a shoulder (44) that engages on the seat surface (112) of the nozzle insert (94), and the contact tip (24) also comprises: a body (30) defining an internal cavity (32) extending from a proximal end portion (34) to a distal end portion (36); at least one opening (52) extending from an external portion of the body (30) to the internal cavity (32); an exit orifice (39) which extends through the distal end portion (36) of the body (30); a distal end face (38); and an external surface (25) that extends between at least one opening (52) and the distal end portion (36) of the body (30), in which the internal gas diverter (110) directs a flow of protective gas that it leaves at least one opening (52) along the outer surface (25) of the contact tip (24), and where the contact tip is selected from a group of contact tips comprising: a working contact tip light (24), a medium work contact tip (24 '), a heavy work contact tip (24' '), in which a main distance (80) of at least one opening (52) to the face The distal end (38) of each contact tip group varies from contact tip to contact tip in order to adjust the flow of protective gas for improved cooling.
    [0002]
    Consumable assembly (16) according to claim 1, characterized by the fact that the internal gas diverter (110) defines a profiled diverter orifice (120).
    [0003]
    Consumable assembly (16) according to claim 1, characterized in that the nozzle body (90) also comprises an internal surface of the diverter (130) to additionally direct the flow of protective gas.
    [0004]
    Consumable assembly (16) according to claim 1, characterized in that the mouthpiece body (90) also comprises an internal divergent section (136) along a portion of the nose (100) thereof.
    [0005]
    Consumable assembly (16) according to claim 1, characterized in that a spacing (150) is defined between the distal end portion (36) of the contact tip (24) and a nose portion (100) of the nozzle body (90), and the spacing (150) is adjusted to control the flow of protective gas.
    [0006]
    Consumable assembly (16) according to claim 1, characterized in that a wall thickness (27) of the contact tip body (30) close to the distal end portion (36) is a function of a diameter of the welding wire that extends through the outlet hole (39).
    [0007]
    Consumable assembly (16) according to claim 6, characterized in that the wall thickness (27) is at least about 0.20 cm (0.08 inch).
    [0008]
    Consumable assembly (16) according to claim 6, characterized in that the wall thickness (27) is at least about 0.30 cm (0.12 inch).
    [0009]
    9. Consumable assembly (16) according to claim 1, characterized in that an area in total cross section of at least one opening (52) is approximately equal to an area in total cross section of a gas inserted in a cable welding on a power pin or socket holes of the arc welding device (10).
    [0010]
    Consumable assembly (16) according to claim 1, characterized in that the main distance (80) from at least one opening (52) to the distal end face (38) is at least about 2.03 cm (0.8 inch).
    [0011]
    Consumable assembly (16) according to claim 1, characterized in that at least one opening (52) defines an arcuate notch (70) that has guide surfaces (72), in which the guide surfaces (72) direct the flow of protective gas for a desired flow characteristic out of at least one opening (52).
    [0012]
    Consumable assembly (16) according to claim 1, characterized in that a volume flow through at least one opening (52) is a function of the main distance (80).
    [0013]
    13. Arc welding apparatus (10), characterized by the fact that it comprises: a handle (12); a conductive tube (14) connected to the handle (12); a cable (18) that conducts the welding current, the protective gas, and a welding wire (20) from a power supply, in which the welding cable (18) is connected to the handle (12); and the consumable assembly as defined in any of the preceding claims, the consumable assembly being attached to the conductive tube.
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    法律状态:
    2019-08-13| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-12-08| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-02-02| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 13/11/2014, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US201361903950P| true| 2013-11-13|2013-11-13|
    US61/903,950|2013-11-13|
    US201462053784P| true| 2014-09-22|2014-09-22|
    US62/053,784|2014-09-22|
    PCT/US2014/065487|WO2015073692A1|2013-11-13|2014-11-13|High performance contact tip and nozzle assembly with improved cooling for use in an arc welding apparatus|
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