Precise key clamp for tailor welding of metal ultra-thin plates

Abstract

The utility model provides a precise key clamp for tailor welding of metal ultrathin plates. The precise key clamp comprises a clamp body. The gasket is detachably installed on the clamp body, a bearing shallow groove is formed in the gasket, and the bearing shallow groove is used for forcibly forming a welding seam; the key pressing claws are arranged perpendicular to the bearing shallow groove and arranged in two rows, one ends of the key pressing claws in the two rows are used for being pressed on two parts to be welded and close to the two sides of the bearing shallow groove respectively, the key pressing claws are detachably fixed to the clamp body through fixing parts, and the positions of the key pressing claws on the clamp body are adjustable. The distance between every two adjacent key pressing claws is adjustable, and the distance between the end, pressed on the to-be-welded piece, of each key pressing claw and the corresponding bearing shallow groove is adjustable. Welding deformation of a thin plate with the thickness of 0.5 mm or below can be restrained, collapse of the front face of a welding seam or large-area holes are avoided, the front face and the back face of the welding seam are well protected by inert gas, and welding quality is guaranteed. Meanwhile, the key pressing claws and the gaskets are easy to replace.

Description

TECHNICAL FIELD

[0001] The utility model relates to metal ultra -thin plate butt welding technical field, concretely relates to a kind of precision keyboard clamps for metal ultra -thin plate butt welding. BACKGROUND

[0002] Chinese invention patent application with the application publication number CN110039243A discloses a kind of anti-deformation tooling suitable for sheet welding, the anti-deformation tooling is fixed to two sheets to be welded by setting two groups of anti-deformation fixed structure, prevent welding deformation, by being set in the bottom baffle air hole, the back of sheet can also be protected by inert gas during welding process.But for the sheet with thickness less than 0.5mm, the anti-deformation tooling is not applicable:1, 0.5mm and below thickness metal ultra -thin plate, after welding, wave deformation is very obvious.In order to suppress this deformation, it needs to ensure that anti-deformation fixed structure is close enough to weld and is relatively dense, and the anti-deformation fixed structure of the anti-deformation tooling cannot adjust the position of pressing;2, 0.5mm and below thickness metal ultra -thin plate, because material is thin, during welding process, molten liquid metal is prone to drop, cause weld front collapse, even appear large area hole, in turn lead to welding sample scrap, and the rectangular groove of the anti-deformation tooling cannot be forced to form weld, and air hole is set on the back of sheet, and it is easy to be blocked by liquid metal. SUMMARY

[0003] The utility model discloses a kind of precision keyboard clamps for metal ultra -thin plate butt welding, can suppress the welding deformation of 0.5mm and below thickness sheet, avoid weld front collapse or appear large area hole, ensure welding quality.

[0004] In order to solve the above technical problems, the utility model provides a kind of precision keyboard clamps for metal ultra -thin plate butt welding, comprising:

[0005] Clamp body;

[0006] Gasket, the gasket is detachably installed on clamp body, shallow groove is set on the gasket, and the shallow groove is used for the forced forming of weld;

[0007] Multiple keyboard pressure paws, the keyboard pressure paw is perpendicular to shallow groove, multiple the keyboard pressure paw is arranged into two columns, and one end of two the keyboard pressure paw is used to press on two pieces to be welded and close to the side of shallow groove, the keyboard pressure paw is detachably fixed on clamp body by fixed part, the position of the keyboard pressure paw on clamp body is adjustable, so that the spacing of adjacent two keyboard pressure paw and the spacing of the end of keyboard pressure paw pressed on piece to be welded and shallow groove are adjustable.

[0008] In some embodiments, the fixture body has two mounting slots, which are located on both sides of the pad. The key pressure claws can be installed at different positions in the mounting slots by fasteners, thereby adjusting the distance between two adjacent key pressure claws.

[0009] Furthermore, the mounting groove is a trapezoidal groove or a dovetail groove.

[0010] In some embodiments, the key presser includes a support portion, a connecting portion, and a pressing portion connected in sequence. The connecting portion has a mounting hole and is mounted on the fixture body through the mounting hole and a fixing member. The support portion presses on the fixture body, and the pressing portion is used to press on the workpiece to be welded.

[0011] In some embodiments, the mounting hole includes an oblong hole, the length direction of which is perpendicular to the support groove.

[0012] In some embodiments, the upper surface of the clamping part is provided with a relief slope, and the lower surface of the clamping part is provided with a clamping surface. The clamping surface is used to press on the workpiece to be welded. The angle between the relief slope and the clamping surface is less than 30°, so that the piano key clamping claw will not interfere with the protective gas nozzle of the welding device.

[0013] In some embodiments, the supporting shallow groove is arc-shaped.

[0014] Preferably, the radius of the arc of the supporting shallow groove is 9mm, the width of the supporting shallow groove is 6mm, and the depth of the supporting shallow groove is 1mm.

[0015] In some embodiments, the two ends of the support shallow groove are perforated by a liner, and the two ends of the clamp body are equipped with connecting blocks. The two connecting blocks are respectively located at the two ends of the support shallow groove. The connecting blocks are provided with vent holes for connecting to a protective air pipe to introduce inert gas into the support shallow groove.

[0016] In some embodiments, shallow support grooves are formed on both the upper and lower surfaces of the pad.

[0017] The beneficial effects of this utility model are as follows:

[0018] 1. This utility model can support liquid metal by setting a shallow support groove, avoiding the problem of weld front collapse and large area of ​​holes, thus forcing the weld to form; by setting multiple adjustable piano key claws, it ensures that the clamping point of the piano key claws on the workpiece to be welded is close enough to the weld, and the dense arrangement of the piano key claws achieves good suppression of wavy deformation of ultra-thin metal plates with a thickness of 0.5mm and below.

[0019] 2. By providing an avoidance slope on the pressing part of the key presser, this utility model can prevent interference between the key presser and the protective gas nozzle of the welding device.

[0020] 3. The shallow support groove of this utility model is arc-shaped, which can concentrate liquid metal in the middle, which is beneficial to the quality of forced weld formation.

[0021] 4. By installing a connecting block, the vent hole of the connecting block can introduce inert gas into the support shallow groove. The inert gas can pass through both sides of the liquid metal, thereby achieving protection of the back of the weld.

[0022] 5. The pads and key clamps of this utility model are detachably connected to the fixture body. When the thermal deformation accumulates to an excessive extent, they can be directly disassembled and replaced.

[0023] 6. The upper and lower surfaces of the pad of this utility model are provided with shallow support grooves, so that the shallow support grooves on both sides of the pad can be used, or it can be used for thin metal plates of different thicknesses. Attached Figure Description

[0024] Figure 1 This is a top view of the present invention;

[0025] Figure 2 This is a top view of the fixture body of this utility model;

[0026] Figure 3 This is a front view of the fixture body of this utility model;

[0027] Figure 4 This is a top view of the gasket of this utility model;

[0028] Figure 5 This is a front view of the gasket of this utility model;

[0029] Figure 6 This is a top view of the piano key presser of this utility model;

[0030] Figure 7 This is a front view of the piano key presser of this utility model;

[0031] Figure 8 This is a schematic diagram of the connecting block of this utility model.

[0032] Reference numerals: clamp body 1; first mounting groove 11; second mounting groove 12; pad 2; support shallow groove 21; key pressure claw 3; support part 31; connecting part 32; mounting hole 321; clamping part 33; clearance slope 331; clamping surface 332; connecting block 4; vent hole 41. Detailed Implementation

[0033] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0034] like Figure 1 As shown, this utility model provides a precision piano key fixture for welding ultra-thin metal plates, including a fixture body 1, a pad 2, and multiple piano key clamping claws 3.

[0035] like Figure 2 , 3 As shown, the fixture body 1 has a plate-like structure with a certain thickness. The upper surface of the fixture body 1 is provided with a first mounting groove 11 and a second mounting groove 12. There are two second mounting grooves 12, which are located on both sides of the first mounting groove 11.

[0036] like Figure 4 , 5 As shown, the gasket 2 is detachably installed in the first mounting groove 11 of the fixture body 1 by bolts. The upper surface of the gasket 2 is flush with the upper surface of the fixture body 1. A shallow support groove 21 is provided on the gasket 2. The shallow support groove 21 is used for forced forming of the weld. The gasket 2 can be made of brass to prevent the weld metal from sticking to the gasket 2.

[0037] Preferably, the supporting shallow groove 21 is arc-shaped, with an arc radius of 9mm, a width of 6mm, and a depth of 1mm. This size of supporting shallow groove 21 can be used for welding metal sheets with a thickness of 0.5mm or less. The supporting shallow groove 21 can also be triangular, trapezoidal, or other structures.

[0038] like Figure 1 As shown, the key pressure claws 3 are arranged perpendicular to the supporting shallow groove 21. Multiple key pressure claws 3 are arranged in two rows, with one end of each row pressing onto two workpieces to be welded and close to both sides of the supporting shallow groove 21. The key pressure claws 3 are detachably fixed to the fixture body 1 via fasteners and the second mounting groove 12. The key pressure claws 3 can be installed at different positions in the second mounting groove 12 via fasteners, thereby adjusting the spacing between adjacent key pressure claws 3. Alternatively, the fixture body 1 may not have the second mounting groove 12, but instead has multiple holes evenly arranged parallel to the supporting shallow groove 21. The key pressure claws 3 can be installed in different holes, thereby adjusting the spacing between adjacent key pressure claws 3.

[0039] like Figure 6 , 7As shown, the piano key clamping claw 3 includes a support part 31, a connecting part 32, and a clamping part 33 connected in sequence. The support part 31, the connecting part 32, and the clamping part 33 are an integral structure. The connecting part 32 has a mounting hole 321. The connecting part 32 is mounted on the fixture body 1 through the mounting hole 321 and the fixing member. The connecting part 32 does not directly contact the fixture body 1. The support part 31 presses on the fixture body 1. The clamping part 33 is used to press on the workpiece to be welded. The mounting hole 321 includes an oblong hole. The length direction of the oblong hole is perpendicular to the support shallow groove 21. The distance between the end of the piano key clamping claw 3 pressing on the workpiece to be welded and the support shallow groove 21 is adjustable.

[0040] Understandably, the shallow support groove 21 supports the liquid metal during welding, preventing the weld face from collapsing and developing large-area voids, thus forcing the weld to form a solid shape. Multiple adjustable key clamping claws 3 ensure that the clamping point of the key clamping claw 3 is sufficiently close to the weld, and the dense arrangement of the key clamping claws 3 effectively suppresses the wavy deformation of ultra-thin metal plates with a thickness of 0.5mm or less. For 0.5mm thick plates, the spacing between two adjacent key clamping claws 3 can be 0 to 20mm, ensuring good suppression of welding deformation in thin plates. Furthermore, since each key clamping claw 3 is an independent structure and a separate clamping point, compared to using a single clamping plate, multiple key clamping claws 3 ensure effective clamping at each point, resulting in reliable clamping performance.

[0041] Optionally, the second mounting groove 12 is a trapezoidal groove or a dovetail groove, such as... Figure 3 As shown, the second mounting slot 12 is a trapezoidal slot, such as... Figure 7 As shown, a trapezoidal bolt can be installed in the second mounting groove 12. One end of the trapezoidal bolt can slide in the second mounting groove 12, and the other end of the trapezoidal bolt passes through the mounting hole 321 and is fixed to the key clamp 3 by a nut.

[0042] In some embodiments, such as Figure 7 As shown, the upper surface of the clamping part 33 is provided with a relief slope 331, and the lower surface of the clamping part 33 is provided with a clamping surface 332. The clamping surface 332 is used to press on the workpiece to be welded. The angle between the relief slope 331 and the clamping surface 332 is less than 30°, so that the piano key clamping claw 3 will not interfere with the protective gas nozzle of the welding device.

[0043] In some embodiments, such as Figure 4 As shown, the pads 2 penetrate both ends of the shallow groove 21, as... Figure 1 As shown, connecting blocks 4 are installed at both ends of the clamp body 1. The two connecting blocks 4 are located at both ends of the supporting shallow groove 21, as follows: Figure 8 As shown, a vent hole 41 is provided on the connecting block 4. A quick-connect fitting can be provided on the vent hole 41. The vent hole 41 is used to connect with the protective air pipe so as to introduce inert gas into the support shallow groove 21.

[0044] Understandably, since the support groove 21 is arc-shaped, the liquid metal will accumulate in the middle of the support groove 21. Inert gas is introduced into the support groove 21, and the inert gas can pass through both sides of the liquid metal, thereby achieving protection of the back of the weld.

[0045] In some embodiments, shallow support grooves 21 are formed on both the upper and lower surfaces of the pad 2.

[0046] When the dimensions of the support groove 21 on the upper and lower surfaces of the pad 2 are the same, the pad 2 can be flipped over and the lower surface of the pad 2 can be used after the support groove 21 on the upper surface of the pad 2 is deformed or burned by the welding heat source. When the dimensions of the support groove 21 on the upper and lower surfaces of the pad 2 are different, different sizes of support groove 21 can be selected according to the thickness of the workpiece to be welded.

[0047] The method of using the precision piano key fixture for welding ultra-thin metal sheets is as follows:

[0048] Step 1: Place the pad 2 in the first mounting groove 11 of the fixture body 1, and fix the pad 2 in the first mounting groove 11 with bolts;

[0049] Step 2: Place two ultra-thin metal plates (thickness ≤ 0.5 mm) flat on the surface of the pad 2, and join the two plates together. The joint should be parallel to the support groove 21 of the pad 2 and aligned with the center line of the support groove 21.

[0050] Step 3: Place the trapezoidal bolts into the second mounting slots 12 on both sides of the fixture body 1, and pass the mounting holes 321 of the key claws 3 through the trapezoidal bolts. One trapezoidal bolt corresponds to one key claw 3. The number of key claws 3 is determined by the length of the ultra-thin metal plate and the distance between two adjacent key claws 3.

[0051] Step 4: Move the key clamping claw 3, along with the trapezoidal bolt it passes through, to the pressing position on the surface of the ultra-thin metal plate. Adjust the distance between the end of the key clamping claw 3 and the joint of the ultra-thin metal plate to achieve close-fit pressing. Tighten the nut on the top of the trapezoidal bolt and lock the screw.

[0052] Step 5: Fix the connecting block 4 to the fixture body 1, and connect the protective air tube to the vent 41 on the connecting block 4;

[0053] Step 6: Set the welding parameters and the shielding gas flow rate for the front and back of the weld, and then perform welding; after welding is completed, release the key clamp 3 and remove the welding sample.

[0054] This utility model has the following specific advantages:

[0055] 1. It effectively suppresses the wavy deformation after welding of ultra-thin metal sheets with a thickness of 0.5 mm or less.

[0056] 2. It achieves forced forming of welds on ultra-thin metal plates with a thickness of 0.5mm and below, completely overcoming the problem of weld front collapse or even large-area holes caused by the molten liquid metal falling. This utility model can achieve uniform and full forming of the front and back of the weld, and high weld joint strength.

[0057] 3. Enables the welding of various metals, especially easily oxidized metals such as titanium alloys / magnesium alloys, with good weld color and appearance on both the front and back sides under inert gas protection.

[0058] 4. Because the key pressers 3 and the pads 2 are close to the weld, the cumulative thermal deformation after multiple welding processes will cause them to become unusable due to significant deformation. Therefore, it is necessary to replace the key pressers 3 and the pads 2 on the back of the weld from time to time. The key pressers 3 and the pads 2 of this invention are easy to replace, and can be replaced within 5 minutes.

[0059] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A precision piano key fixture for welding ultra-thin metal plates, characterized in that, include: Fixture body (1); A liner (2) is detachably mounted on the fixture body (1), and a shallow support groove (21) is provided on the liner (2) for forced forming of the weld. Multiple key pressers (3) are arranged perpendicular to the support groove (21). The multiple key pressers (3) are arranged in two rows. One end of each row of key pressers (3) is used to press on two workpieces to be welded and close to both sides of the support groove (21). The key pressers (3) are detachably fixed to the fixture body (1) by fasteners. The position of the key pressers (3) on the fixture body (1) is adjustable, so that the distance between two adjacent key pressers (3) is adjustable and the distance between the end of the key presser (3) pressing on the workpiece and the support groove (21) is adjustable.

2. The precision piano key fixture for welding ultra-thin metal plates according to claim 1, characterized in that, The fixture body (1) has two mounting slots, which are located on both sides of the pad (2). The key pressers (3) can be installed in different positions of the mounting slots by means of fasteners, thereby adjusting the distance between two adjacent key pressers (3).

3. The precision piano key fixture for welding ultra-thin metal plates according to claim 2, characterized in that, The mounting groove is a trapezoidal groove or a dovetail groove.

4. The precision piano key fixture for welding ultra-thin metal plates according to claim 1, characterized in that, The key presser (3) includes a support part (31), a connecting part (32), and a pressing part (33) connected in sequence. The connecting part (32) has a mounting hole (321). The connecting part (32) is mounted on the fixture body (1) through the mounting hole (321) and a fixing member. The support part (31) presses on the fixture body (1). The pressing part (33) is used to press on the workpiece to be welded.

5. The precision piano key fixture for welding ultra-thin metal plates according to claim 4, characterized in that, The mounting hole (321) includes an oblong hole, the length of which is perpendicular to the support groove (21).

6. The precision piano key fixture for welding ultra-thin metal plates according to claim 4, characterized in that, The upper surface of the clamping part (33) is provided with a relief slope (331), and the lower surface of the clamping part (33) is provided with a clamping surface (332). The clamping surface (332) is used to press on the workpiece to be welded. The angle between the relief slope (331) and the clamping surface (332) is less than 30°, so that the key claw (3) will not interfere with the protective gas nozzle of the welding device.

7. The precision piano key fixture for welding ultra-thin metal plates according to any one of claims 1 to 6, characterized in that, The supporting shallow groove (21) is arc-shaped.

8. The precision piano key fixture for welding ultra-thin metal plates according to claim 7, characterized in that, The radius of the arc of the support groove (21) is 9mm, the width of the support groove (21) is 6mm, and the depth of the support groove (21) is 1mm.

9. The precision piano key fixture for welding ultra-thin metal plates according to any one of claims 1 to 6, characterized in that, The two ends of the support groove (21) are penetrated by the pad (2), and the two ends of the clamp body (1) are equipped with connecting blocks (4). The two connecting blocks (4) are located at the two ends of the support groove (21). The connecting blocks (4) have ventilation holes (41) for connecting to the protective air pipe to introduce inert gas into the support groove (21).

10. The precision piano key fixture for welding ultra-thin metal plates according to any one of claims 1 to 6, characterized in that, Shallow grooves (21) are provided on both the upper and lower surfaces of the pad (2).

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