CN209754272U - Vacuum laser welding machine - Google Patents

Abstract

The utility model provides a vacuum laser-beam welding machine, including the airtight type cavity that has perisporium and roof, set up in the first observation window of perisporium, set up in lens are worn to the laser of roof, airtight type cavity communicates evacuating device and dust extraction respectively, first observation window can in the perisporium is opened or is closed, the unsettled laser welding head that sets up in top that lens were worn to laser. The vacuum laser welding machine is controlled to carry out laser welding in a closed vacuum environment, plasma plumes generated by laser induction are obviously reduced, the refraction and reflection losses of laser are reduced, the required laser power is reduced, the energy acting on a welding point is stable, the generation amount of metal vaporization can be effectively reduced, dust is generated little, meanwhile, the gas amount in the vacuum environment is extremely small, metal solution rises along the wall of the melting tank, bubbles can rapidly escape out, and therefore, in the vacuum environment, gas holes are extremely few, and the fusion depth of the metal solution is more stable than that of the metal solution under the atmospheric pressure.

Description

Vacuum laser welding machine

Technical Field

The utility model relates to a welding machine technical field especially relates to a vacuum laser-beam welding machine.

Background

At present, different workpieces are combined by adopting a welding mode, but if welding equipment is incomplete, if welding is carried out under the conditions that a sealed space cannot be controlled or dust cannot be discharged in time and the like, dust, welding slag and the like can be splashed to the place to influence the process of a production process and even cause potential safety hazards of workpiece products, for example, welding of a secondary battery is a typical example.

Secondary battery usually needs to connect the flexible coupling and the top cap of utmost point ear in the electricity core to carry out vacuum laser welding, and present secondary battery's vacuum laser welding leads to having in the flexible coupling welding of electricity core to explode many, the dust serious problem that splashes because welding equipment's limitation, probably has 70 a plurality of diameters to be < 100 um's welding slag, 30 a plurality of diameters to be 100 ~ 200 um's welding slag, 10 a plurality of diameters to be > 200 um's welding slag in the single battery. The dust and the welding slag are splashed into the naked electric core, and the secondary battery is manufactured and then extruded in the charge-discharge cycle, so that the cathode and the anode of the secondary battery are in short circuit. Meanwhile, the problems of multiple explosion points and multiple air holes exist in laser welding of the top cover and the aluminum shell of the secondary battery, so that the effective melting width and the melting depth of some welding spots cannot meet the requirements, the secondary battery has subsequent leakage risks, the comprehensive performances such as the use safety and the quality of the battery cell are seriously influenced by the problems, and the problems are urgently solved in the industry.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a novel laser-beam welding machine is many, the gas pocket is many, the dust splashes seriously, the dust granule big waiting welding quality difficult problem with the explosion point that appears in solving the laser welding.

In order to realize the above object, the utility model provides a vacuum laser welding machine, including have perisporium and roof the airtight type cavity, set up in the first observation window of perisporium, set up in lens are worn to the laser of roof, airtight type cavity communicates evacuating device and dust extraction respectively, first observation window can the perisporium is opened or is closed, the unsettled laser welding head that sets up in top that lens were worn to laser.

Furthermore, a welding workbench is arranged in the closed cavity and used for clamping and positioning the workpiece to be welded and facilitating shortening of the distance between the workpiece to be welded and the laser penetration mirror, wherein the workpiece to be welded is arranged in the closed cavity.

Furthermore, the peripheral wall is also provided with a second observation window, the second observation window is perpendicular to the first observation window, the welding condition of the workpiece to be welded in the closed cavity can be observed from multiple directions through the combination of the first observation window and the second observation window which are perpendicular to each other, and the first observation window is opened to take out the welded workpiece.

Furthermore, the vacuum pumping device is provided with a vacuum pumping pipe communicated with the closed cavity, the vacuum pumping pipe is communicated with a vacuum breaking valve, and the vacuum effect can be broken through the vacuum breaking valve so as to ensure the stable operation of air intake and air exhaust.

Furthermore, the closed cavity is provided with a vacuum meter for detecting the internal vacuum degree so as to monitor the vacuum degree in the closed cavity in real time.

Furthermore, the dust suction device is provided with an air inlet pipe and an exhaust pipe, the air inlet pipe and the exhaust pipe are communicated with the closed cavity, and dust and welding slag can be sucked away from the closed cavity to avoid entering the battery core or the battery by performing dust suction work after the workpieces to be welded are welded through the air inlet pipe and the exhaust pipe.

Furthermore, the air inlet pipe and the exhaust pipe are arranged on the top wall, so that air inlet and exhaust operations can be facilitated.

Further, be equipped with the LED lamp in the airtight type cavity, further, the LED lamp is inserted with the aviation and is connected, the aviation is inserted fixedly in the roof, and the setting of LED lamp also can be observed the welding condition in the airtight type cavity through first observation window under the condition that light is dark.

The utility model discloses a vacuum laser welding machine control carries out laser welding under confined vacuum environment, the plasma feather brilliance that laser induction produced is showing and is reducing, make the refraction of laser, reflection loss is few, the laser power of demand diminishes, and be used in the energy stability of welding point, can effectively reduce the production volume of metal vaporization, consequently, the dust produces fewly, the quantity of gas is few under the vacuum environment simultaneously, and metal solution rises along the molten bath wall, the bubble can run out rapidly, therefore under the vacuum environment, the gas pocket is few, it melts deeply under than the atmospheric pressure and surely stabilizes. Moreover, a small amount of dust and small-particle welding slag generated in the welding process can be removed from the sealed cavity through the dust suction device, so that the influence on the use safety and the quality of the secondary battery is avoided.

Drawings

Fig. 1 is a schematic perspective view of one direction of an embodiment of the vacuum laser welding machine of the present invention.

Fig. 2 is a schematic perspective view of another direction of an embodiment of the vacuum laser welding machine of the present invention.

FIG. 3 is a perspective view of the vacuum laser welder of FIG. 1 welding a first workpiece to be welded.

FIG. 4 is a perspective view of the vacuum laser welder of FIG. 1 welding a second work piece to be welded.

Description of the elements

100-vacuum laser welding machine; 1-a closed cavity; 11-a top wall; 13-a peripheral wall; 15-a welding bench; 2-a first viewing window; 3-a vacuum-pumping device; 31-evacuation tube; 33-breaking the vacuum valve; 4, penetrating a lens by laser; 5-laser welding head; 61-an air inlet pipe; 63-an air exhaust pipe; 7-vacuum meter; 8-aviation plug; 8a-LED lamps; 9-a second viewing window; 10-the workpiece to be welded.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. It should be noted that, unless otherwise expressly limited, the terms "mounted," "connected," "fixed," and the like are intended to be inclusive and mean, for example, that they may be fixedly connected or detachably connected, that they may be directly connected or indirectly connected through an intermediate medium, and that they may communicate between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The vacuum laser welding machine of the present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1 to 4, the vacuum laser welding machine 100 includes a sealed cavity 1, the sealed cavity 1 has a peripheral wall 13 and a top wall 11, the peripheral wall 13 is provided with a first observation window 2, the first observation window 2 can be opened or closed on the peripheral wall 13 so as to put in or take out a workpiece 10 to be welded in the sealed cavity 1, the first observation window 2 can be pivotally connected and fixed with the peripheral wall 13, and the two can be in seamless butt joint so as to maintain the sealed cavity 1 as a sealed cavity. The peripheral wall 13 is further provided with a second observation window 9, the second observation window 9 is arranged perpendicular to the first observation window 2, namely the second observation window 9 and the first observation window 2 are arranged on two mutually perpendicular surfaces of the peripheral wall 13, the welding condition of the workpiece 10 to be welded in the sealed cavity 1 can be observed from multiple directions through the combination of the vertically arranged first observation window 2 and the second observation window 9, and the first observation window 2 is opened to take out the welded workpiece. The top wall 11 is provided with a laser through lens 4, the closed cavity 1 is respectively communicated with a vacuum-pumping device 3 and a dust-collecting device (not shown in the figure), a laser welding head 5 is arranged above the laser through lens 4 in a suspending way, and a laser vibration lens (not shown in the figure) is arranged on one side of the laser welding head 5 corresponding to the laser through lens 4. Be equipped with LED lamp 8a in the airtight cavity 1, LED lamp 8a is inserted 8 with the aviation and is connected, and the aviation is inserted 8 and is fixed in roof 11.

As shown in fig. 1 to 4, the vacuum extractor 3 has a vacuum tube 31 connected to the sealed cavity 1, the vacuum tube 31 is connected to a vacuum breaker 33, and the vacuum effect in the sealed cavity 1 can be broken by the vacuum breaker 33 to ensure the stable operation of air intake and air exhaust. The sealed cavity 1 is provided with a vacuum gauge 7 for detecting the internal vacuum degree so as to monitor the vacuum degree in the sealed cavity 1 in real time.

As shown in fig. 1 to 4, the dust suction device has an air inlet pipe 61 and an air exhaust pipe 63, the air inlet pipe 61 and the air exhaust pipe 63 are both communicated with the sealed cavity 1, and dust and welding slag can be sucked from the sealed cavity 1 to avoid entering the battery core or the battery by performing dust suction after the welding of the workpiece 10 to be welded through the air inlet pipe 61 and the air exhaust pipe 63. The air inlet pipe 61 and the air exhaust pipe 63 are disposed on the top wall 11 and located at opposite ends of the top wall 11, so as to facilitate air inlet and exhaust operations.

Fig. 3 and 4 show a vacuum laser welding machine 100 for welding different workpieces 10 to be welded, fig. 3 shows a flexible connection and a top cover of a battery cell of a secondary battery, fig. 4 shows a top cover and an aluminum case of a secondary battery, and a welding table 15 is arranged in the sealed cavity 1 in fig. 3 for clamping and positioning the workpieces 10 to be welded and facilitating shortening of the distance between the workpieces 10 to be welded and the laser lens 4 in the sealed cavity 1.

The operation of the vacuum laser welding machine 100 of the present invention will be described with reference to fig. 1 to 3.

The method comprises the steps of opening a first observation window 2, positioning a workpiece 10 to be welded (a flexible connection and a top cover of a battery cell of a secondary battery) on a welding workbench 15, closing the first observation window 2, opening a vacuumizing tube 31 for vacuumizing, stopping vacuumizing operation and maintaining the sealed cavity 1 in a sealed state after the vacuum degree in the sealed cavity 1 reaches data monitored by a vacuum meter 7, performing laser welding on the flexible connection and the top cover of the battery cell of the secondary battery by using a laser welding head 5 through a laser lens 4, opening a vacuum breaking valve 33 after welding is completed, inputting air through an air inlet tube 61, performing air extraction through an air extraction tube 63, removing dust and small-particle welding slag in the sealed cavity 1 while performing air extraction, and opening the first observation window 2 and taking out the welded workpiece in the sealed cavity 1 after air extraction. The vacuum laser welding machine 100 controls laser welding in a closed vacuum environment, plasma plumes generated by laser induction are obviously reduced, the refraction and reflection losses of laser are reduced, the required laser power is reduced, the energy acting on a welding point is stable, and the generation amount of metal vaporization can be effectively reduced, so that less dust is generated, meanwhile, the gas amount in the vacuum environment is extremely small, the metal solution rises along the wall of the melting tank, bubbles can quickly escape out, so that in the vacuum environment, few air holes are formed, and the fusion depth is more stable than under the atmospheric pressure. Moreover, a small amount of dust and small-particle welding slag generated in the welding process can be removed from the sealed cavity 1 through the dust suction device, so that the influence on the use safety and the quality of the secondary battery is avoided.

It should be noted that the above-mentioned embodiments illustrate rather than limit the scope of the invention, and that modifications of various equivalent forms of the invention, which may occur to those skilled in the art after reading the present application, fall within the scope of the appended claims.

Claims (9)

1. The vacuum laser welding machine is characterized by comprising a closed cavity with a peripheral wall and a top wall, a first observation window arranged on the peripheral wall and a laser penetrating lens arranged on the top wall, wherein the closed cavity is respectively communicated with a vacuumizing device and a dust suction device, the first observation window can be opened or closed on the peripheral wall, and a laser welding head is arranged above the laser penetrating lens in a hanging mode.

2. The vacuum laser welding machine according to claim 1, wherein a welding table is provided in the closed chamber.

3. The vacuum laser welder according to claim 1, wherein the peripheral wall is further provided with a second observation window, and the second observation window is disposed perpendicular to the first observation window.

4. The vacuum laser welding machine of claim 1, wherein the evacuation device has an evacuation tube in communication with the enclosed cavity, the evacuation tube in communication with a vacuum breaker.

5. The vacuum laser welding machine according to claim 4, wherein the hermetically sealed cavity is provided with a vacuum gauge for detecting an internal vacuum degree.

6. The vacuum laser welding machine according to claim 1, wherein the dust suction device has an air inlet pipe and an air exhaust pipe, and the air inlet pipe and the air exhaust pipe are both communicated with the sealed cavity.

7. The vacuum laser welder of claim 6, wherein the air inlet tube and the air exhaust tube are both disposed on the top wall.

8. The vacuum laser welding machine of claim 1, wherein an LED lamp is disposed in the sealed cavity.

9. The vacuum laser welder according to claim 8, wherein the LED light is connected to an aerial plug, the aerial plug being secured to the top wall.