Special device for automatic laser welding of ultrathin metal drum

Abstract

The utility model discloses a special device for automatic laser welding of an ultrathin metal drum, which belongs to the technical field of welding equipment and comprises a workbench, a laser welding component and a clamp component, the clamp component comprises a first fixing plate, a first driving motor, a first half die, a second half die, a middle plate, a cylinder component and a second fixing plate, a first groove is formed in the first half die, a second groove is formed in the second half die, the metal barrel blank comprises a first half blank and a second half blank, the first groove is used for containing the first half blank, and the second groove is used for containing the second half blank. According to the die, the two half dies and the two grooves are arranged, and the two grooves have a good fixing effect on a blank, so that the blank is prevented from sliding; the clamp assembly clamps a metal barrel blank, the laser welding assembly performs automatic laser welding, the welding efficiency is high, the welding effect is good, and the product percent of pass is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of welding equipment, and in particular relates to a special device for automatically welding ultra-thin metal barrels with laser. Background Art

[0002] Metal barrels are generally made of sheet metal plates welded together. Common materials for metal sheets include carbon steel, stainless steel, iron, etc. When processing some metal barrels, sheet steel sheets are generally used to form half barrels after stamping in a mold. The edges of the two half barrels are butt-welded to form a complete metal barrel body. In the existing butt welding process, manual welding is usually used for one circle. However, since the half barrel has multiple straight segments and arc segments, welding is difficult, the welding speed is slow, and the final product failure rate is high. Utility Model Content

[0003] The technical problem solved by the utility model is to provide a laser automatic welding ultra-thin metal barrel special device to automatically weld the metal barrel, thereby improving the welding speed and quality.

[0004] Technical solution: In order to solve the above technical problems, the technical solution adopted by the utility model is as follows:

[0005] A special device for laser automatic welding of ultra-thin metal barrels, comprising a workbench, a laser welding assembly connected to the workbench, and a fixture assembly arranged on the workbench for fixing a metal barrel blank, the fixture assembly comprising a first fixed plate, a first drive motor arranged on the first fixed plate, a first half mold connected to the first drive motor, a second half mold corresponding to the first half mold, an intermediate plate movably connected to the second half mold, a cylinder assembly connected to the intermediate plate, and a second fixed plate connected to the cylinder assembly, the first half mold is provided with a first groove corresponding to the metal barrel blank, and the second half mold is provided with a second groove corresponding to the metal barrel blank.

[0006] Furthermore, the laser welding assembly includes a welding machine main unit, a welding head connected to the welding machine main unit, and a displacement assembly connected to the welding head, the displacement assembly includes an X-axis slide connected to the workbench, a Z-axis slide connected to the X-axis slide, and a Y-axis slide connected to the Z-axis slide, and the welding head is connected to the Y-axis slide.

[0007] Furthermore, a first guide rod is connected between the first fixing plate and the second fixing plate, and a first through hole corresponding to the first guide rod is provided on the middle plate.

[0008] Furthermore, the first half mold is provided with a second guide rod, and the second half mold is provided with a second through hole corresponding to the second guide rod.

[0009] Furthermore, the number of the first guide rods is more than one.

[0010] Furthermore, the laser welding assembly also includes a display screen connected to the welding machine host.

[0011] Furthermore, a cover shell covering the fixture assembly, welding head and displacement assembly is provided on the workbench, and a negative pressure fan is provided on the cover shell.

[0012] Beneficial effects: Compared with the prior art, the utility model has the following advantages:

[0013] 1. By setting a first half mold and a second half mold, a first groove corresponding to the first half blank is set on the first half mold, and a second groove corresponding to the second half blank is set on the second half mold. The two grooves have a good fixing effect on the blank to prevent the blank from sliding;

[0014] 2. The fixture assembly clamps the metal barrel blank, and the laser welding assembly automatically performs laser welding, which has high welding efficiency and good welding effect, and a high product qualification rate;

[0015] 3. When closing the mold, the protruding strip presses the first half of the blank and the second half of the blank under the elastic force of the spring, avoiding the situation where the clamping force is too small or too large when the clamp is used directly, ensuring the fitting effect of the first half of the blank and the second half of the blank, improving the welding quality, reducing the deformation of the ultra-thin blank, and is suitable for the welding of ultra-thin metal barrels. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of the device of the utility model embodiment;

[0017] Figure 2 is a schematic diagram of the structure of the clamp assembly in the embodiment;

[0018] Figure 3 is a schematic diagram of the displacement assembly structure in the embodiment;

[0019] Figure 4 This is a schematic diagram of the first half mold structure of an embodiment of the utility model;

[0020] Figure 5 This is a schematic diagram of the second half mold structure of the utility model embodiment;

[0021] Figure 6 yes Figure 4 Enlarged view of point A in the middle;

[0022] Figure 7 This is a schematic diagram of the cross-sectional structure of the protruding strip when the mold is closed;

[0023] Figure 8 It is a schematic diagram of the structure of the metal barrel blank after welding. DETAILED DESCRIPTION

[0024] The present invention will be further explained below in conjunction with specific embodiments. The embodiments are implemented based on the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0025] like Figure 1 , Figure 2 and Figure 3 As shown, a laser automatic welding device for ultra-thin metal barrels is used for welding metal barrel blanks, including a workbench 1, a laser welding assembly 2, a fixture assembly 3, a cover 8 and a negative pressure fan 9. The workbench 1 is a rectangular table. The laser welding assembly 2 includes a welding machine host 21, a welding head 22, a displacement assembly 23 and a display screen 24. The welding machine host 21 is arranged on the side of the workbench 1. The welding machine host 21 includes a power supply, a laser generator, a control system, an observation system and a cooling system. The welding head 22 is connected to the welding machine host 21 to emit a laser to act on the metal barrel blank. The displacement assembly 23 is connected to the welding head 22 to adjust the position of the welding head 22. The displacement assembly 23 includes an X-axis slide 2 31. Z-axis slide 232 and Y-axis slide 233. X-axis slide 231 is connected to workbench 1 through a bracket. X-axis slide 231 is arranged on the side of fixture assembly 3. Z-axis slide 232 is connected to X-axis slide 231. When X-axis slide 231 is working, it can drive Z-axis slide 232 to move left and right (move along X-axis direction). Y-axis slide 233 is connected to Z-axis slide 232. When Z-axis slide 232 is working, it can drive Y-axis slide 233 to move up and down (move along Z-axis direction). Welding head 22 is connected to Y-axis slide 233. When Y-axis slide 233 is working, it can drive welding head 22 to move forward and backward (move along Y-axis direction). Welding head 22 is located in the upper area of ​​fixture assembly 3. The displacement assembly 23 is electrically connected to the welding machine host 21, and the welding machine host 21 can control the operation of the displacement assembly 23. The display screen 24 is connected to the welding machine host 21 to adjust the laser working position and related parameters. The welding head 22 can move in three-axis space of X, Y, and Z to adapt to the butt weld of two halves of special-shaped workpieces. Affected by the straightness of the weld, the laser can track the left and right offset of the weld. The laser welding assembly 2 uses an existing laser welding machine, such as a three-axis linkage automatic laser welding machine. The optical fiber length can be customized. It is suitable for materials such as carbon steel, stainless steel, galvanized sheet, and aluminum sheet. The weld requirement is <0.2mm, the welding speed is 0-120mm / s, and the protective gas can be selected from argon or nitrogen. The cooling system is water-cooled and equipped with a CCD display system. Real-time microscopic observation of the workpiece is conducive to precise positioning and inspection of the welding effect during welding.

[0026] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5and Figure 8 As shown, the metal barrel blank includes a first half blank 71 and a second half blank 72, and the fixture assembly 3 is arranged on the workbench 1 for fixing the metal barrel blank. The fixture assembly 3 includes a first fixed plate 31, a first drive motor 32, a first half mold 33, a second half mold 34, an intermediate plate 35, a cylinder assembly 36, a second fixed plate 37, a first guide rod 38 and a second guide rod 39. The first fixed plate 31 is vertically arranged at one end of the workbench 1, and the second fixed plate 37 is symmetrically arranged at the other end of the workbench 1 with the first fixed plate 31. The first drive motor 32 is connected to the outer side of the first fixed plate 31 and the drive shaft of the first drive motor 32 passes through the first fixed plate 31. The first half mold 33 and the second half mold 34 are connected to each other. The first half mold 33 is connected to the driving shaft of a driving motor 32, a first groove 331 corresponding to the metal barrel blank is provided on the first half mold 33, and the first groove 331 is used to accommodate the first half blank 71. The middle plate 35 is vertically arranged between the first fixed plate 31 and the second fixed plate 37, and a first guide rod 38 is connected between the first fixed plate 31 and the second fixed plate 37 (a plurality of first guide rods 38 can be provided), and a first through hole corresponding to the first guide rod 38 is provided on the middle plate 35, and the first guide rod 38 has a limiting and guiding effect on the middle plate 35. The middle plate 35 is movably connected to the second fixed plate 37 through a cylinder assembly 36, and the cylinder assembly 36 adopts an existing cylinder, and the cylinder of the cylinder assembly 36 The cylinder is connected to the outside of the second fixed plate 37, and the piston rod of the cylinder assembly 36 passes through the second fixed plate 37 and is connected to the middle plate 35, so that the cylinder assembly 36 can drive the middle plate 35 to move in the direction of the first half mold 33, and the second half mold 34 corresponds to the first half mold 33. The second half mold 34 is provided with a second groove 341 corresponding to the metal barrel blank, and the second groove 341 is used to accommodate the second half blank 72. The first half mold 33 is provided with a second guide rod 39, and the second half mold 34 is provided with a second through hole corresponding to the second guide rod 39. The second half mold 34 is rotatably connected to the middle plate 35 through a bearing. When the middle plate 35 moves in the direction of the first half mold 33, it drives the second half mold 34 and the first half mold The mold 33 is closed, and the second guide rod 39 plays a guiding role (during laser welding, by adjusting the angle of the metal barrel blank and the angle of the welding head 22, the laser acts obliquely on the welding point of the metal barrel blank below the second guide rod 39, so that the second guide rod 39 does not affect the welding operation when the metal barrel blank rotates one circle during welding). After the mold is closed, the first drive motor 32 drives the first half mold 33 to rotate. Since the second half mold 34 is rotatably connected to the middle plate 35 through a bearing, the first half mold 33 drives the second half mold 34 to rotate when it rotates, which facilitates the welding head 22 to weld the metal barrel blank between the first half mold 33 and the second half mold 34, and welds the first half blank 71 to the second half blank 72.

[0027] like Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, the first half mold 33 and the second half mold 34 are respectively provided with a protruding strip 4, which is arranged along the outer edge of the first groove 331 and the second groove 341. When the metal barrel blank is placed on the first groove 331 and the second groove 341, the protruding strip 4 corresponds to the edge of the metal barrel blank. The first half mold 33 and the second half mold 34 are respectively provided with a limiting groove 51. The back of the protruding strip 4 is connected to a plurality of springs 5, and the springs 5 ​​are accommodated in the limiting groove 51. When the protruding strip 4 is pressed, the protruding strip 4 overcomes the elastic force of the spring 5 and enters the limiting groove 51. The limiting groove 51 plays a guiding and limiting role to prevent the protruding strip 4 from running off. Since the shape of the metal barrel blank in this embodiment is irregular, the outer edges of the first groove 331 and the second groove 341 are also irregular. The protruding strip 4 is divided into a plurality of line segments, and the plurality of line segments include straight line segments and arc segments. Each line segment is not connected to each other, and each line segment is respectively connected to a plurality of springs 5. A plurality of countersunk holes 401 are respectively provided on each line segment of the protruding strip 4, and a positioning thread is provided at a position corresponding to the countersunk hole 401 on the first half mold 33 and the second half mold 34. The counterbore 401 is provided with a positioning bolt 61, which corresponds to the positioning threaded hole 62. The positioning bolt 61 is threadedly connected to the positioning threaded hole 62 through the positioning bolt 61. The protruding strip 4 is movably connected to the first half mold 33 and the second half mold 34 through the spring 5. The outer side of the protruding strip 4 is arc-shaped. When the first half blank 71 is placed in the first groove 331 and the second half blank 72 is placed in the second groove 341, the edge of the first half blank 71 and the edge of the second half blank 72 are in contact with the protruding strip 4. When the first half mold 33 is connected to the second half mold 34, the protruding strip 4 is movably connected to the first half mold 33 and the second half mold 34. When the mold 34 is closed, the protruding strip 4 is pressed on the edge of the first half blank 71 and the edge of the second half blank 72 under the elastic force of the spring 5. The edge of the first half blank 71 and the edge of the second half blank 72 fit together under the pressure of the protruding strip 4, which facilitates the welding operation of the welding head 22 and avoids the situation where the clamping force is too small or too large when the clamp is directly used. The fitting effect of the first half blank 71 and the second half blank 72 is ensured, the welding quality is improved, the deformation of the ultra-thin blank is reduced, and it is suitable for the welding of ultra-thin metal barrels with a thickness of 0.2mm-0.6mm.

[0028] like Figure 1 As shown, a cover shell 8 is provided on the workbench 1, and the cover shell 8 covers the fixture assembly 3, the welding head 22 and the displacement assembly 23. An opening is provided on the front of the cover shell 8 to facilitate personnel to place and take out the metal barrel blank. A negative pressure fan 9 is provided on the top of the cover shell 8. The negative pressure fan 9 adopts an axial flow fan to absorb the dust and harmful smoke generated during welding. The negative pressure fan 9 is connected to the external gas collection equipment through a pipeline.

[0029] The metal barrel blank in this embodiment is cut from sheet steel → stretched → shaped → trimmed → punched → embossed to form a half barrel blank, and the two half barrel blanks are welded to form a barrel body, which is welded to the oil port, handle and other accessories and then pressure tested → cleaned → dried → sprayed → packed after finished product inspection.

[0030] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A laser automatic welding device for ultra-thin metal barrels, characterized in that: The invention comprises a workbench (1), a laser welding assembly (2) connected to the workbench (1), and a clamp assembly (3) arranged on the workbench (1) for fixing a metal barrel, wherein the clamp assembly (3) comprises a first fixing plate (31), a first driving motor (32) arranged on the first fixing plate (31), a first half mold (33) connected to the first driving motor (32), a second half mold (34) corresponding to the first half mold (33), an intermediate plate (35) movably connected to the second half mold (34), a cylinder assembly (36) connected to the intermediate plate (35), and a second fixing plate (37) connected to the cylinder assembly (36), wherein the first half mold (33) is provided with a first groove (331) corresponding to the metal barrel, and the second half mold (34) is provided with a second groove (341) corresponding to the metal barrel.

2. The laser automatic welding device for ultra-thin metal barrels according to claim 1 is characterized in that: The laser welding assembly (2) comprises a welding machine mainframe (21), a welding head (22) connected to the welding machine mainframe (21), and a displacement assembly (23) connected to the welding head (22); the displacement assembly (23) comprises an X-axis slide (231) connected to the workbench (1), a Z-axis slide (232) connected to the X-axis slide (231), and a Y-axis slide (233) connected to the Z-axis slide (232); the welding head (22) is connected to the Y-axis slide (233).

3. The laser automatic welding device for ultra-thin metal barrels according to claim 1 is characterized in that: A first guide rod (38) is connected between the first fixing plate (31) and the second fixing plate (37), and a first through hole corresponding to the first guide rod (38) is provided on the intermediate plate (35).

4. The laser automatic welding device for ultra-thin metal barrels according to claim 3 is characterized in that: The first half mold (33) is provided with a second guide rod (39), and the second half mold (34) is provided with a second through hole corresponding to the second guide rod (39).

5. The laser automatic welding device for ultra-thin metal barrels according to claim 3 is characterized in that: The number of the first guide rods (38) is more than one.

6. The laser automatic welding device for ultra-thin metal barrels according to claim 2 is characterized in that: The laser welding assembly (2) also includes a display screen (24) connected to the welding machine host (21).

7. The laser automatic welding device for ultra-thin metal barrels according to claim 2 is characterized in that: The workbench (1) is provided with a cover (8) covering the clamp assembly (3), the welding head (22) and the displacement assembly (23), and the cover (8) is provided with a negative pressure fan (9).

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