Auxiliary positioning tool for straight cylinder type stud welding gun head

Abstract

The utility model relates to the field of welding protection supporting devices, and provides a straight cylinder type stud welding gun head auxiliary positioning tool which comprises a penetrating cylinder, a penetrating positioning hole is formed in the penetrating cylinder along the axis, and the hole diameter of the positioning hole is matched with the outer diameter of a clamping sleeve. The side wall of the penetrating cylinder is provided with two abutting arms used for positioning and arranged along the diameter of the sleeve or at least three abutting arms with the included angle not larger than 180 degrees, each abutting arm is provided with an outer wall face attached to the inner side wall face of the sleeve, at least one abutting arm is further provided with a supporting base column, and gaps of the abutting arms form a protective gas flow channel. The auxiliary positioning tool for the straight cylinder type stud welding gun head, provided by the utility model, is convenient to assemble and disassemble on the premise of ensuring that the jacket and the sleeve are strictly coaxial, and can ensure the perpendicularity of a welded stud on the premise of not influencing the welding operation; the problems that in a straight cylinder type stud welding gun in the prior art, deflection angles occur to welded studs due to deformation of a clamping sleeve, and then the welding quality is poor are solved.

Description

Technical Field

[0001] This utility model relates to the field of welding protection support devices, and in particular to an auxiliary positioning fixture for a straight-tube stud welding gun head. Background Technology

[0002] In the prior art, there exists a straight-tube stud welding torch, with the welding torch head as follows: Figure 1 As shown, the jacket mounting base 5 is integrated with the welding torch. The jacket 3 passes through the central through hole of the jacket mounting base 5 and can move along the central through hole of the jacket mounting base 5 to clamp and fix the welding stud 1. The other end of the jacket 3 is connected to an excitation device to weld the welding stud 1 onto the panel to be welded. The end of the welding torch is fixed with a sleeve 4 by threads. When using this type of straight-tube stud welding torch, the sleeve 4 is placed against the welding panel. At this time, the welding stud 1 and the jacket 3 are suspended above the welding panel. When the welding trigger is pulled, the excitation device will press the welding stud 1 tightly onto the welding panel. At the same time, the high current provided by the welding torch will melt the welding head of the welding stud 1. During the welding process, a large amount of protective gas will be introduced. The protective gas passes through the gap between the sleeve 4 and the jacket mounting base 5, forming a high pressure in the sleeve 4 to prevent the welding slag from splashing during welding.

[0003] However, the existing straight-tube stud welding gun has certain problems. Because the length of its sleeve 3 extending out of the sleeve mounting seat 5 is relatively long, after a period of use (about two weeks), the sleeve 3 will deform to a certain extent due to the impact force generated during welding, causing the sleeve 3 and the sleeve 4 to no longer be coaxial, which ultimately leads to an angular deviation in the welding stud 1 and affects the welding quality. Utility Model Content

[0004] The purpose of this invention is to provide an auxiliary positioning fixture for a straight-tube stud welding gun head, in order to solve the problem of poor welding quality caused by the deformation of the jacket of the straight-tube stud welding gun in the prior art, which results in the stud being misaligned.

[0005] To achieve the above objectives, this utility model provides an auxiliary positioning fixture for a straight-tube stud welding gun head, including a insertion tube with a positioning hole for a jacket to pass through, the diameter of which is adapted to the outer diameter of the jacket; two abutment arms are provided on the side wall of the insertion tube, each abutment arm having an outer wall surface that fits against the inner wall surface of the jacket, the two abutment arms being arranged along the diameter of the jacket, or at least three abutment arms are provided on the side wall of the insertion tube, the central angle between any two adjacent abutment arms not exceeding 180°; at least one abutment arm is provided with a support base column whose lower end contacts the panel to be welded during use to support the insertion tube at a certain height above the panel to be welded; the total length from the lower end of the support base column to the upper end of the abutment arm does not exceed the distance from the end face of the jacket to the end of the jacket mounting seat, and the gap between adjacent abutment arms forms a flow channel for the shielding gas to pass through.

[0006] Furthermore, the sleeve is provided with four abutment arms, which are arranged in pairs facing each other and are respectively set along the first diameter and the second diameter of the sleeve, with the first diameter and the second diameter being perpendicular to each other.

[0007] Furthermore, the height of the contact arm is consistent with the length of the insertion tube.

[0008] Furthermore, the aforementioned support columns are provided on the two abutment arms arranged along the first diameter.

[0009] Furthermore, the width of the support column is the same as the width of the abutment arm, and the support column has an outer wall surface that fits against the inner wall surface of the sleeve.

[0010] Furthermore, the supporting columns are thin-walled structures.

[0011] Furthermore, the wall thickness of the insert sleeve is less than the dimension of the abutment arm in the sleeve diameter direction.

[0012] Furthermore, the total length from the lower end of the support column to the upper end of the abutment arm is equal to the distance from the end face of the sleeve to the end of the clamping mounting seat.

[0013] Furthermore, the end of the abutment arm facing the clamp mounting base has a chamfer.

[0014] Beneficial effects:

[0015] This utility model innovatively provides an auxiliary positioning fixture for a straight-tube stud welding gun head, including a through-hole with a through-hole along its axis, the diameter of which is adapted to the outer diameter of the sleeve. In one case, two abutment arms are provided on the side wall of the through-hole, each abutment arm having an outer wall surface that fits against the inner wall surface of the sleeve, and the two abutment arms are arranged along the diameter of the sleeve. In another case, at least three abutment arms are provided on the side wall of the through-hole, and the rounded angle between any two adjacent abutment arms is no greater than 180°. At least one of the abutment arms is provided with a support base column. The total length of the entire auxiliary positioning fixture does not exceed the distance from the end face of the sleeve to the end of the sleeve mounting base. The sleeve is passed through the positioning hole, and the auxiliary positioning fixture for the straight-tube stud welding gun head is placed inside the sleeve, using the positioning hole to achieve alignment between the sleeve and the jacket. The auxiliary positioning fixture for the straight-tube stud welding gun head provided by this utility model is easy to install and disassemble while ensuring that the jacket and sleeve are strictly coaxial. It can ensure the verticality of the jacket without affecting the welding operation, and solves the problem of poor welding quality caused by the deformation of the jacket in the existing straight-tube stud welding gun. Attached Figure Description

[0016] Figure 1A schematic diagram of a welding gun head without an auxiliary positioning fixture for a straight-tube stud welding gun head;

[0017] Figure 2 A schematic diagram of the auxiliary positioning fixture for a straight-tube stud welding gun head;

[0018] Figure 3 This is a schematic diagram of a welding gun head equipped with an auxiliary positioning fixture for a straight-tube stud welding gun head.

[0019] In the figure: 1. Welding stud; 2. Straight-tube stud welding gun head auxiliary positioning fixture; 21. Inserting sleeve; 22. Abutment arm; 23. Support base column; 24. Positioning hole; 3. Jacket; 4. Sleeve; 5. Jacket mounting base. Detailed Implementation

[0020] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0021] The principle and concept of this utility model is to design an auxiliary positioning fixture suitable for straight-tube stud welding gun heads, including a through-hole with a diameter that matches the outer diameter of the sleeve for centering and constraining the sleeve. Two abutment arms can be provided on the side wall of the through-hole, each abutment arm having an outer wall surface that fits against the inner wall surface of the sleeve, facilitating coaxial positioning of the through-hole and the sleeve. The two abutment arms are arranged along any diameter of the central hole of the sleeve, or the through-hole has at least three abutment arms, with the central angle between any two adjacent abutment arms not exceeding 180°. At least one of the abutment arms has a supporting base column to support the entire positioning fixture, creating a certain circumferential welding space between the positioning fixture and the welding panel. The gap between two adjacent abutment arms forms a flow channel for the protective gas to circulate. The length of the entire auxiliary positioning fixture is not greater than the distance from the end face of the sleeve to the end of the sleeve mounting base, so as to ensure that the sleeve remains flush with the welding panel during welding.

[0022] Based on the above principles and concepts, this utility model provides a straight-tube stud welding gun head auxiliary positioning fixture and its various embodiments for further explanation.

[0023] Based on the above principles, in a basic embodiment, such as Figure 2 , Figure 3In the provided embodiment, the straight-tube stud welding gun head auxiliary positioning fixture includes a through-tube 21, on which a positioning hole 24 is provided for the sleeve 3 to pass through. The diameter of the positioning hole 24 is greater than or equal to the outer diameter of the sleeve 3 within the tolerance range. Two abutting arms 22 are also provided on the side wall of the through-tube 21. The abutting arms 22 have an outer wall surface that fits against the inner wall surface of the sleeve 4. The two abutting arms 22 are arranged along the diameter of the sleeve. The two abutting arms 22 arranged along the diameter ensure that the through-tube 21 and the sleeve 4 are coaxial.

[0024] In another case, at least three abutment arms 22 are provided on the side wall of the insertion cylinder 21. The at least three abutment arms 22 are arranged around the axis of the sleeve 4, and the central angle between two adjacent abutment arms 22 is no greater than 180°. The abutment arms 22 provided in this way provide support for the insertion cylinder 21 in at least three directions, preventing the insertion cylinder 21 from deviating from the axis and ensuring that the insertion cylinder 21 is coaxial with the sleeve 4.

[0025] In both of the above cases, at least one of the abutment arms 22 is further provided with a support base 23. The support base 23 is used to support the entire straight-tube stud welding gun head auxiliary positioning fixture 2, forming an annular welding space between the insertion cylinder 21 and the welding panel. The gap between two adjacent abutment arms 22 constitutes a flow channel for the welding shielding gas to pass through. The welding shielding gas passes through the flow channel and flows into the welding space to limit the welding slag generated during welding and prevent the welding slag from splashing onto the threaded section of the welding stud 1 and causing damage to the threaded section; straight-tube stud welding The total length of the auxiliary positioning fixture 2 for the welding gun head does not exceed the distance from the end face of the sleeve 4 to the end of the clamp mounting seat 5, so that during welding operations, the lower surface of the support base 23 is flush with the lower surface of the sleeve 4. The entire auxiliary positioning fixture 2 for the straight-tube stud welding gun head can be concealed inside the sleeve 4. Under the condition that the clamp 3 does not deviate, the sleeve 4 can be completely abutted against the welding panel without affecting the welding operation. This solves the problem of poor welding quality caused by the easy deformation of the clamp in the straight-tube stud welding gun head in the prior art.

[0026] Based on the above embodiments, in one embodiment, such as Figure 2 , Figure 3 In the provided embodiment, the inserting cylinder 21 is provided with four abutment arms 22. The four abutment arms 22 are arranged in pairs along the first diameter and the second diameter of the sleeve 4, respectively. The first diameter is perpendicular to the second diameter. The coaxiality of the inserting cylinder 21 and the sleeve 4 can be better guaranteed by the four abutment arms 22 arranged along the diameter of the sleeve 4. In another embodiment, three abutment arms 22 can be provided. The three abutment arms 22 are evenly arranged in a 120° circumferential direction around the axis of the sleeve 4 on the inserting cylinder 21. The coaxiality of the inserting cylinder 21 and the sleeve 4 is guaranteed by the three abutment arms 22 with an adjacent central angle of 120°.

[0027] Based on the above embodiments, in one embodiment, the height of the abutment arm 22 can be greater than or less than the height of the insertion tube 21; in a more preferred embodiment, such as... Figure 2 , Figure 3 In the provided embodiment, the height of the abutment arm 22 is the same as the height of the inserting tube 21. The shape of the abutment arm 22 is more regular and easier to manufacture.

[0028] Based on the above embodiments, in one embodiment, such as Figure 2 , Figure 3 In the provided embodiment, support base columns 23 are provided on the two abutment arms 22 arranged along the first diameter. This can reduce the contact area between the spatter generated during welding and the support base columns 23, reduce the deformation of the straight-tube stud welding gun head auxiliary positioning fixture 2, and extend its service life. In another embodiment, support base columns 23 can also be provided on all base columns 23.

[0029] Based on the above embodiments, in one embodiment, the support column 23 is located at the middle of the abutment arm 22, serving only a supporting function for the insertion cylinder 21; in a more preferred embodiment, such as Figure 2 , Figure 3 In the provided embodiment, the width of the support base column 23 is the same as that of the abutment arm 22, and the support base column also has an outer wall surface that fits against the inner wall surface of the sleeve 4. In this way, by using the support base column 23 as an extension of the abutment arm 22 in the axial direction, the coaxiality of the insertion sleeve 21 and the sleeve 4 can be better determined, thereby determining the coaxiality between the jacket 3 and the sleeve 4, and ensuring the perpendicularity of the welding stud 1 during welding.

[0030] Based on the above embodiments, in one embodiment, the thickness of the support column 23 is the distance from the outer wall surface of the abutment arm 22 to the outer circumferential surface of the insertion cylinder; in a more preferred embodiment, such as Figure 2 , Figure 3 In the provided embodiment, the support column 23 is a thin-walled structure. The support column 23 after the thin-walled section serves as the support structure for the straight-tube stud welding gun head auxiliary positioning fixture 2, which greatly increases the welding space and the flow rate of the welding shielding gas during the welding process.

[0031] Based on the above embodiments, in one embodiment, such as Figure 2 , Figure 3 In the provided embodiment, the wall thickness of the insertion cylinder 21 is less than the thickness of the abutment arm 22. Under the premise of ensuring the aperture and overall strength of the insertion cylinder 21, reducing the wall thickness of the insertion cylinder 21 can increase the flow channel of the welding shielding gas and increase the flow rate of the welding shielding gas.

[0032] Based on the above embodiments, in one embodiment, such as Figure 2 , Figure 3 In the provided embodiment, the overall length from the lower end face of the support base 23 to the upper end face of the abutment arm 22 is exactly equal to the distance from the end face of the sleeve 4 to the end of the clamping mounting seat 5; in another embodiment, provided that the welding space is sufficient, the overall length of the straight-tube stud welding gun head auxiliary positioning fixture 2 can be less than the distance from the end face of the sleeve 4 to the end of the clamping mounting seat 5.

[0033] Based on the above embodiments, in a more preferred embodiment, such as... Figure 2 , Figure 3 In the provided embodiment, the end face of the abutment arm 22 facing the sleeve mounting base 5 is chamfered to facilitate the insertion of the straight-tube stud welding gun head auxiliary positioning fixture 2 into the sleeve 4.

[0034] When using the straight-tube stud welding gun head auxiliary tooling provided by this utility model, such as... Figure 3 As shown, the straight-tube stud welding gun head auxiliary positioning fixture 2 is placed inside the sleeve 4. The positioning hole 24 on the insertion cylinder 21 centers and constrains the clamp mounting seat 5. Two sets of abutment arms 22, each with two arms arranged along two mutually perpendicular diameters, ensure that the insertion cylinder 21 and the sleeve 4 are coaxial. Two support base columns 23 support the straight-tube stud welding gun head auxiliary positioning fixture 2 to form a welding space between the insertion cylinder 21 and the welding panel. During stud welding, the welding gun head is vertically abutted against the welding panel, and the clamp 3 clamps the welding stud 1 and suspends it at a certain height above the welding panel. Welding is then started. Power is supplied, and welding shielding gas is injected into the welding space through the flow channel. When the welding gun trigger is pulled, the jacket 3 drops instantly and melts the welding head of the welding stud 1 when it comes into contact with the welding panel through a large current, thus completing the welding of the welding stud 1. By using the straight-tube stud welding gun head auxiliary positioning fixture 2 to center and straighten the jacket 3, the welding quality of the stud is improved. Moreover, the placement of the straight-tube stud welding gun head auxiliary positioning fixture 2 makes it easy to replace, improving the convenience of welding operations. This solves the problem of poor welding quality caused by the deformation of the jacket in the existing straight-tube stud welding gun, which results in the welding stud being misaligned.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. The patent protection scope of the present utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present utility model shall also be included within the protection scope of the present utility model.

Claims

1. A straight shank stud welding gun head auxiliary positioning tooling characterized by, The wearing cylinder is provided with a positioning hole for the jacket to pass through, and the diameter of the positioning hole is matched with the outer diameter of the jacket; two abutting arms are arranged on the side wall of the wearing cylinder, the abutting arms have outer wall surfaces matched with the inner side wall surface of the sleeve, and the two abutting arms are arranged along the diameter of the sleeve, or at least three abutting arms are arranged on the side wall of the wearing cylinder, and the central angle between any two adjacent abutting arms is not greater than 180°; at least one abutting arm is provided with a support column which is in contact with the welded panel at the lower end during use to support the wearing cylinder at a certain height from the welded panel; the total length from the lower end of the support column to the upper end of the abutting arm is not more than the distance from the end surface of the sleeve to the end head of the jacket mounting seat, and the gap between the adjacent abutting arms forms a flow channel for the protective gas to pass through.

2. The straight barrel stud welding gun head auxiliary positioning tooling of claim 1, wherein, Four abutting arms are arranged on the wearing cylinder, the four abutting arms are arranged in pairs and opposite to each other, and are arranged along the first diameter and the second diameter of the sleeve respectively, and the first diameter and the second diameter are perpendicular.

3. The straight-in-line stud welding gun head auxiliary positioning tooling of claim 2, wherein, The height of the abutting arm is consistent with the length of the wearing cylinder.

4. The straight barrel stud welding gun head auxiliary positioning tooling of claim 2, wherein, The two abutting arms arranged along the first diameter are provided with the support column.

5. The straight-shafted stud welding gun head auxiliary positioning tooling of any one of claims 1-4, wherein, The width of the support column is consistent with the width of the abutting arm, and the support column has an outer wall surface matched with the inner side wall surface of the sleeve.

6. The straight-in-line stud welding gun head auxiliary positioning tooling of claim 5, wherein, The support column is a thin-walled structure.

7. A straight shank stud welding gun head auxiliary positioning tooling according to any one of claims 1-4, characterized in that, The wall thickness of the wearing cylinder is smaller than the size of the abutting arm in the diameter direction of the sleeve.

8. A straight shank stud welding gun head auxiliary positioning tooling according to any one of claims 1-4, characterized in that, The total length from the lower end of the support column to the upper end of the abutting arm is equal to the distance from the end surface of the sleeve to the end head of the jacket mounting seat.

9. A straight shank stud welding gun head auxiliary positioning tooling according to any one of claims 1-4, characterized in that, The end of the abutting arm facing the jacket mounting seat is provided with a chamfer.

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