Mechanical positioning welding-slag-free laser welding nut assembly

Abstract

The utility model provides a mechanical positioning welding-slag-free laser welding nut assembly which comprises a welding nut sequentially comprising a positioning section, a preassembling section, a pressing section and a welding section from top to bottom, an annular welding slag discharging groove is formed in the position, located on the outer side of the welding section, of the bottom end of the pressing section, and an expansion flow guide groove is formed in the periphery of the annular welding slag discharging groove. The mechanical installation positioning tool is arranged on the outer side of the positioning section in a sleeved mode, and the bottom end of the mechanical installation positioning tool makes contact with the top of the pressing section. The beneficial effects are achieved as follows: the annular welding slag discharging groove and the expansion flow guide groove are arranged to prevent welding slag from being attached to a welding area or other parts of the nut, so that thread damage and corrosion risks caused by welding slag residues are reduced; the mechanical installation positioning tool is matched with the welding nut to achieve mechanical positioning, and whether the welding nut is assembled in place or not can be judged through visual inspection.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automobile parts processing especially to the field of welding nut design technology, specifically a kind of mechanical positioning no welding slag laser welding nut assembly. BACKGROUND

[0002] In sheet metal welding industry, the thin plate welding of nut and the welding slag generated after welding, and because the ordinary welding nut has no groove for discharging welding slag, it can cause the welding slag to splash onto the internal thread during welding, affecting the original size accuracy and thread quality, and the existence of welding slag can also directly damage the thread surface, so that the nut cannot be normally matched with bolt or other components, and the welding slag cannot be judged by naked eye whether it enters the internal thread, and assembly cannot be normally screwed into connecting piece, which affects production efficiency, and in the prior art, optical sensor needs to be added for the welding position to identify whether the nut is preassembled in place during clamping and welding of conventional welding nut, and the addition of optical sensor can cause the design of feeding equipment to be complex, the manufacturing cost to be high, and the positioning verification process required can generate additional processing time, affecting processing efficiency.

[0003] The prior art discloses a kind of anti-welding slag nuts, patent No.CN206449089U, discloses a kind of anti-welding slag nuts, including nut body, the inner peripheral surface and outer peripheral surface of the first end face of the nut body towards installation hole are respectively provided with annular inner boss and annular outer boss that protrude to installation hole direction, the annular inner boss and annular outer boss form accommodating groove between, the height of the annular inner boss is higher than the annular outer boss.The utility model utilizes annular outer boss to carry out welding, annular inner boss stops welding slag, and the normal use of nut is not affected by the splashing of welding slag onto the internal thread of nut;

[0004] The prior art discloses a kind of anti-welding slag nuts for automobile, patent No.CN209510881U, discloses, a kind of anti-welding slag nuts for automobile includes: nut body and screw hole, the lower end surface of nut body is provided with a plurality of welding spots, the lower end surface of nut body is provided with a plurality of guide grooves, welding spot is 3, guide groove is 3, and guide groove is located between screw hole and welding spot, nut body, screw hole, welding spot and guide groove are formed by cold extrusion once. SUMMARY

[0005] In view of the shortcomings of the prior art described above, the purpose of the utility model is to provide a kind of mechanical positioning no welding slag laser welding nut assembly, to solve the difficulties of prior art.

[0006] To achieve the above object and other related purposes, the utility model provides a kind of mechanical positioning no welding slag laser welding nut assembly, comprising:

[0007] The welding nut 1 is sequentially provided with a positioning section 11, a preloading section 12, a pressing section 13 and a welding section 14 from top to bottom, and the bottom end of the pressing section 13 is provided with an annular slag groove 15 outside the welding section 14, and the annular slag groove 15 is provided with a volume expansion flow guide groove 16 around.

[0008] The mechanical installation positioning tool 2 is sleeved outside the positioning section 11, and the bottom end of the mechanical installation positioning tool 2 is in contact with the top of the pressing section 13.

[0009] Further, the welding nut 1 is divided into four sections, wherein:

[0010] The positioning section 11 is located at the uppermost part of the welding nut 1 and is used for fixing with the mechanical installation positioning tool;

[0011] The preloading section 12 is between the positioning section 11 and the pressing section 13 and is used for preliminarily fixing the position of the welding nut 1;

[0012] The pressing section 13 is between the preloading section 12 and the welding section 14 and is in contact with the bottom end of the mechanical installation positioning tool 2, so as to ensure that the welding nut 1 remains stable during the welding process;

[0013] The welding section 14 is located at the bottom of the welding nut 1 and is used for welding with the sheet.

[0014] In the technical solution, the design of the preloading section 12 and the pressing section 13 ensures the position accuracy of the welding nut 1 during the welding process and avoids deformation caused by thermal stress.

[0015] In the technical solution, the use of the mechanical installation positioning tool 2 ensures the stability of the nut during the entire welding process and prevents displacement caused by vibration or other external forces.

[0016] According to the preferred solution, the positioning section 11 and the welding section 14 are both cylindrical in outer contour and are coaxially arranged.

[0017] Further, the cylindrical design ensures that the center lines of the positioning section 11 and the welding section 14 are completely consistent, which helps to achieve high-precision centering, which is crucial for positioning during the welding process and can ensure the accurate position of the nut on the sheet and reduce deviation.

[0018] In the technical solution, the cylindrical design of the welding surface reduces sharp corners and acute edges and reduces the occurrence of stress concentration, thereby improving the fatigue resistance of the nut during long-term use.

[0019] According to the preferred solution, the outer contour of the preloading section 12 is arc-shaped.

[0020] Further, the arc-shaped pre-assembly section 12 can be precisely positioned when clamped in the mechanical installation positioning tool 2.

[0021] According to the preferred embodiment, the outer contour of the welding section 14 is conical.

[0022] Further, the conical welding section 14 has a larger contact surface with the bottom of the mechanical installation positioning tool 2, and is more stable when clamped and transported by the mechanical installation positioning tool 2.

[0023] According to the preferred embodiment, a through hole 17 is formed in the center of the welding nut 1, and the through hole 17 is a smooth hole or a threaded hole.

[0024] In the technical solution, the through hole 17 formed in the center of the welding nut 1 is provided as a through hole 17, which means that the internal thread can be machined after the welding nut is installed, and the internal thread is machined after the product is welded, so that the high thread accuracy requirement can be ensured.

[0025] According to the preferred embodiment, the mechanical installation positioning tool 2 comprises:

[0026] The installation positioning sleeve 21 is sleeved on the outside of the welding nut 1, a limiting channel 23 is formed in the center of the installation positioning sleeve 21, and a fixed connection handle 22 is arranged on one side of the installation positioning sleeve 21.

[0027] The limiting channel 23 comprises, from top to bottom, a material rod limiting section 231, a positioning sleeve limiting section 232, and a nut abutting section 233, and the inner diameter of the positioning sleeve limiting section 232 is smaller than that of the positioning sleeve limiting section 232.

[0028] The push material rod 24 is arranged in the material rod limiting section 231, the bottom end of the push material rod 24 is clamped in the positioning section 11, the bottom of the push material rod 24 is provided with a positioning sleeve 25 through welding, and the positioning sleeve 25 is sleeved on the outside of the positioning section 11.

[0029] Further, in the process of assembling the welding nut 1 by using the mechanical installation positioning tool 2, the top positioning section 11 of the welding nut 1 enters from the bottom of the limiting channel 23 of the installation positioning sleeve 21, is clamped in the positioning space composed of the push material rod 24 and the positioning sleeve 25 after passing through the nut abutting section 233, is moved to the corresponding welding hole of the sheet by the mechanical hand, the welding section 14 is inserted into the welding hole on the sheet by the mechanical hand downward, the welding section 14 is pushed by the welding nut 1 to move the push material rod 24 and the positioning sleeve 25 upward along the positioning sleeve limiting section 232 by the mechanical hand continuing to move downward, until the pre-assembly section 12 and the pressing section 13 are abutted with the nut abutting section 233, the outer side wall of the bottom of the welding section 14 is connected with the inner side wall of the welding hole on the sheet by laser welding, after the welding is completed, the mechanical arm is upward, the push material rod 24 is downward, and the nut abutting section 233 is separated from the welding nut 1 naturally.

[0030] In the technical solution, the technician can judge by naked eye whether the welding nut 1 is correctly sleeved in the mechanical installation positioning tool 2, if the positioning is wrong or the welding nut 1 is not good, a large gap will exist between the mechanical installation positioning tool 2 and the welding nut 1 in the process that the welding nut 1 is assembled into the welding hole by the mechanical hand, and the welding nut 1 cannot be smoothly clamped in the limiting channel 23.

[0031] According to the preferred solution, the nut fitting section 233 is arc-shaped, and the nut fitting section 233 is arranged corresponding to the pre-assembly section 12 and the pressing section 13.

[0032] The welding nut, the annular welding slag groove, the expansion flow guide groove and the mechanical installation positioning tool are adopted, and the following beneficial effects are achieved.

[0033] 1. The annular welding slag groove and the expansion flow guide groove are arranged to prevent welding slag from adhering to the welding area or other parts of the nut, thereby reducing the risk of thread damage and corrosion caused by residual welding slag.

[0034] 2. The mechanical installation positioning tool cooperates with the welding nut to realize mechanical positioning, and whether the welding nut is assembled in place can be judged by naked eye observation.

[0035] The most preferred embodiment of the present application will be described in more detail below with reference to the accompanying drawings, so that the features and advantages of the present application can be easily understood. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 A three-dimensional structure schematic diagram of the present application is shown;

[0037] Figure 2 A three-dimensional structure enlarged schematic diagram of the mechanical installation positioning tool in the present application is shown;

[0038] Figure 3 A cross-sectional view of the mechanical installation positioning tool in the present application is shown;

[0039] Figure 4 A three-dimensional structure enlarged schematic diagram of the welding nut in the present application is shown;

[0040] Figure 5 A cross-sectional view of the welding nut in the present application is shown;

[0041] REFERENCE NUMERALS

[0042] 1. Welding nut;

[0043] 11. Positioning section;

[0044] 12. Pre-assembly section;

[0045] 13, compression section;

[0046] 14, welding section;

[0047] 15, annular row of welding slag groove;

[0048] 16, expansion flow guide groove;

[0049] 17, through hole;

[0050] 2, mechanical installation positioning tool;

[0051] 21, installation positioning sleeve;

[0052] 22, fixed connection handle;

[0053] 23, limiting channel;

[0054] 231, material rod limiting section;

[0055] 232, positioning sleeve limiting section;

[0056] 233, nut fitting section;

[0057] 24, push rod;

[0058] 25, positioning sleeve; DETAILED DESCRIPTION

[0059] In order to make the purpose, technical scheme and advantages of the technical scheme of the utility model more clear, the technical scheme of the utility model embodiment will be described clearly and completely in the following combined with the drawings of the utility model embodiment. The same reference signs in the drawings represent the same parts. It should be noted that the described embodiment is part of the embodiment of the utility model, not all embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0060] Compared with the embodiment shown in the drawings, the feasible implementation scheme within the protection scope of the utility model can have fewer components, have other components not shown in the drawings, different components, differently arranged components or differently connected components, etc. In addition, two or more components in the drawings can be realized in a single component, or a single component shown in the drawings can be realized as a plurality of separate components.

[0061] Unless otherwise defined, technical terms or scientific terms used herein shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The use of the terms "first", "second" and similar terms in the application patent specification and claims does not necessarily indicate temporal or chronological order, number or importance of the components, but merely distinguishes different components. Similarly, the use of the terms "one" or "a" does not necessarily limit the quantity of the components. The use of the terms "including", "containing", and similar terms is intended to present the elements or components listed before the term, and their equivalents, but does not exclude other elements or components. The use of the terms "connected" or "coupled" does not necessarily mean physical or mechanical connection, but can include electrical connection, whether direct or indirect. The terms "upper", "lower", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute positions of the described objects are changed, the relative positional relationships can also be changed accordingly.

[0062] The mechanical positioning non-slag laser welding nut assembly is particularly suitable for designing a welding nut that can prevent slag and can be positioned by a tooling machine.

[0063] In general, the mechanical positioning non-slag laser welding nut assembly mainly comprises a welding nut 1, an annular row slag groove 15, a capacity guide groove 16, and a mechanical installation positioning tool 2. Referring to Figure 1 which shows the arrangement relationship of the nut, the annular row slag groove 15, the capacity guide groove 16, and the mechanical installation positioning tool 2.

[0064] The utility model discloses a mechanical positioning no welding slag laser welding nut assembly specific embodiment: the mechanical installation positioning frock 2 one side fixed connection handle 22 connection installation to mechanical hand, and mechanical hand moves installation positioning sleeve 21 to welding nut 1 feeding table, and mechanical hand drives installation positioning sleeve 21 to make welding nut 1 top positioning section 11 from installation positioning sleeve 21 limit passageway 23 bottom into, through nut adhesion paragraph 233 after clamping in the positioning space that pusher rod 24 and positioning sleeve 25 constitute, and mechanical hand drives installation welding nut 1's installation positioning sleeve 21 and moves to the welding hole position above corresponding to sheet, and mechanical hand inserts welding section 14 into the welding hole on sheet downwards, and mechanical hand continues to make upper welding nut 1 push pusher rod 24 and positioning sleeve 25 and move upwards along positioning sleeve limit section 232, until welding nut 1 preloading section 12 and compact section 13 and nut adhesion paragraph 233 in installation positioning sleeve 21 adhesion, and welding section 14 bottom outside wall and the inboard wall of welding hole on sheet are connected through laser welding, in the process of welding, there is annular row of welding slag groove 15 and the groove of expansion flow guide groove 16, and welding slag also will not splash into through hole 17, after welding, mechanical arm upwards, and pusher rod 24 downwards make nut adhesion paragraph 233 natural and welding nut 1 separate, still need to explain that through hole 17 in welding nut 1 can be light hole, can carry out thread processing to welding nut 1 after welding, can guarantee higher thread accuracy.

[0065] The welding nut 1 is sequentially provided with a positioning section 11, a pre-assembly section 12, a pressing section 13 and a welding section 14 from top to bottom, wherein the positioning section 11 is located at the uppermost part of the welding nut 1 and is used for fixing with a mechanical installation positioning tool; the pre-assembly section 12 is located between the positioning section 11 and the pressing section 13 and is used for preliminarily fixing the position of the welding nut 1; the pressing section 13 is located between the pre-assembly section 12 and the welding section 14, contacts the bottom end of the mechanical installation positioning tool 2, ensures that the welding nut 1 remains stable during the welding process, and can be judged whether the pre-assembly is in place by observing the fitting degree of the pre-assembly section 12, the pressing section 13 and the mechanical installation positioning tool 2; the welding section 14 is located at the bottom of the welding nut 1 and is used for welding with the sheet, and it is to be noted that the outer contour of the positioning section 11 and the welding section 14 is a cylinder, the cylindrical design ensures that the center lines of the positioning section 11 and the welding section 14 are completely consistent, and the positioning section 11 and the welding section 14 are coaxially arranged, which is crucial for positioning during the welding process and can ensure the accurate position of the nut on the sheet and reduce deviation; the outer contour of the pre-assembly section 12 is in the shape of an arc, and the outer contour of the welding section 14 is in the shape of a cone, the arc-shaped pre-assembly section 12 can achieve accurate positioning when clamped in the mechanical installation positioning tool 2, and the tapered welding section 14 has a larger contact surface with the bottom of the mechanical installation positioning tool 2 and is more stable when clamped and transported by the mechanical installation positioning tool 2; it is to be noted that a through hole 17 is provided in the center of the welding nut 1, the through hole 17 is a light hole or a threaded hole, the through hole 17 can be machined after the welding nut is installed, and the internal thread is machined after the product is welded, which prevents the deformation of the welding nut 1 caused by thermal stress during welding, so that the through hole 17 of the internal thread deforms, machining the thread after setting the light hole can ensure high thread accuracy, and finally it is to be noted that the bottom end of the pressing section 13 is located outside the welding section 14 and is provided with an annular slag discharge groove 15, and the annular slag discharge groove 15 is provided with a capacity expansion and flow guide groove 16 around it, the annular slag discharge groove 15 and the capacity expansion and flow guide groove 16 are used for collecting and discharging the welding slag generated during the welding process, these grooves can effectively capture the welding slag and collect and guide it, preventing the welding slag from adhering to the welding area or other parts of the nut, thereby reducing the risk of thread damage and corrosion caused by residual welding slag.

[0066] The mechanical installation positioning tool 2 is arranged outside the positioning section 11, the bottom end of the mechanical installation positioning tool 2 is in contact with the top of the pressing section 13, the mechanical installation positioning tool 2 comprises an installation positioning sleeve 21, a limiting channel 23, a pushing rod 24 and a positioning sleeve 25, wherein the installation positioning sleeve 21 is arranged outside the welding nut 1, the limiting channel 23 is arranged in the middle of the installation positioning sleeve 21, a fixed connecting handle 22 is arranged on one side of the installation positioning sleeve 21, the limiting channel 23 comprises a rod limiting section 231, a positioning sleeve limiting section 232 and a nut adhering section 233 from top to bottom, the inner diameter of the positioning sleeve limiting section 232 is smaller than that of the positioning sleeve limiting section 232, so as to prevent the positioning sleeve 25 from being separated, the pushing rod 24 is arranged in the rod limiting section 231, the bottom end of the pushing rod 24 is clamped in the positioning section 11, the bottom of the pushing rod 24 is provided with the positioning sleeve 25 through welding, the positioning sleeve 25 is arranged outside the positioning section 11, and the pushing rod 24 and the positioning sleeve 25 clamp the positioning section 11 of the welding nut 1.

[0067] The above embodiments only exemplarily illustrate the principles and effects of the present application, and are not used to limit the present application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought of the present application should be covered by the claims of the present application.

Claims

1. A mechanically positioned, slag-free laser welded nut assembly, characterized by, Include: The welding nut (1) is sequentially provided with a positioning section (11), a preloading section (12), a pressing section (13) and a welding section (14) from top to bottom, an annular slag groove (15) is arranged at the bottom end of the pressing section (13) outside the welding section (14), and an expansion flow guide groove (16) is arranged around the annular slag groove (15); The mechanical installation positioning tool (2) is sleeved outside the positioning section (11), and the bottom end of the mechanical installation positioning tool (2) is in contact with the top of the pressing section (13).

2. The mechanical positioning, residue-free laser welded nut assembly of claim 1, wherein, The outer contour of the positioning section (11) and the welding section (14) is cylindrical, and the positioning section (11) and the welding section (14) are coaxially arranged.

3. The mechanical positioning, residue free laser welded nut assembly of claim 2, wherein, The outer contour of the preloading section (12) is arc-shaped.

4. The mechanical positioning, residue free laser welded nut assembly of claim 3, wherein, The outer contour of the welding section (14) is conical.

5. The mechanical positioning, residue free laser welded nut assembly of claim 4, wherein, The welding nut (1) is provided with a through hole (17) in the middle, and the through hole (17) is a light hole or a threaded hole.

6. The mechanical positioning, residue-free laser welded nut assembly of claim 5, wherein, The mechanical installation positioning tool (2) comprises: The installation positioning sleeve (21) is sleeved outside the welding nut (1), the installation positioning sleeve (21) is provided with a limiting channel (23) in the middle, and the installation positioning sleeve (21) is provided with a fixed connection handle (22) on one side; The limiting channel (23) is sequentially provided with a material rod limiting section (231), a positioning sleeve limiting section (232) and a nut fitting section (233) from top to bottom, and the inner diameter of the positioning sleeve limiting section (232) is smaller than that of the positioning sleeve limiting section (232); The push rod (24) is arranged in the material rod limiting section (231), the bottom end of the push rod (24) is clamped in the positioning section (11), and the bottom of the push rod (24) is provided with a positioning sleeve (25) through welding, and the positioning sleeve (25) is sleeved outside the positioning section (11).

7. The mechanically positioned, slag-free laser welded nut assembly of claim 6, wherein, The nut fitting section (233) is arc-shaped, and the nut fitting section (233) is correspondingly arranged with the preloading section (12) and the pressing section (13).

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