Jewelry micro-welding apparatus and method

Abstract

The present application relates to the technical field of welding, and discloses a jewelry microscopic welding device and method thereof, which comprises a machine body for jewelry welding, a welding chamber and a laser welding head installed on the machine body, and the laser welding head is used for welding the jewelry in the welding chamber, and a microscope is installed on the machine body and used for observing the jewelry welding, characterized in that a protective head for spraying gas is installed on the laser emitting end of the laser welding head, and the protective head sprays inert gas to exhaust the air at the welding position. The protective head and the adjusting head work cooperatively to form a strong and uniform inert gas protection layer around the welding position. The protective head exhausts the inert gas from above, and the adjusting head exhausts the inert gas from below, and the inert gas is collided at the same speed, so that the airflow impact forces are offset, the air at the welding position is exhausted, the oxidation reaction of the jewelry with oxygen and the like in the welding process is avoided, and the surface oxidation discoloration is prevented.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding, in particular to a jewelry microscopic welding device and method thereof. BACKGROUND

[0002] The jewelry microscopic welding device is a professional equipment for jewelry processing, which is mainly applied in the field of fine jewelry making and repairing. The jewelry microscopic welding device utilizes the principle of welding technology, which usually generates high heat through a laser energy source to melt the connecting parts of jewelry materials such as gold, silver, platinum and other metals, and then cools and solidifies to firmly connect each component together. Unlike ordinary welding equipment, it is equipped with a microscope. The microscope can magnify the welding site, allowing the operator to clearly see the fine structure and welding points of the jewelry, so that very fine operations can be performed to ensure the precision and quality of welding.

[0003] Currently, during welding, the jewelry is prone to oxidation reaction with oxygen in the air, causing the surface of the jewelry to discolor, which seriously affects the appearance quality and commercial value of the jewelry. The high temperature generated by the laser causes the material surface to ionize, forming an ion layer that can absorb part of the laser energy, resulting in a decrease in effective laser energy reaching the welding pool. This is like adding an absorption layer in the light path, reducing the utilization rate of the laser. On the other hand, the presence of the ion layer may also cause scattering of the laser energy in local areas, changing the energy distribution of the laser and affecting the shape and size of the molten pool. Therefore, the present application provides a jewelry microscopic welding device and method thereof. SUMMARY

[0004] In view of the above-mentioned deficiencies of the prior art, the present application provides a jewelry microscopic welding device and method thereof, which evacuates the air at the welding position and blows away the ion layer by two inert gases that collide with each other, thereby enhancing the welding effect.

[0005] The present application provides the following technical solution: a jewelry microscopic welding device, comprising a machine body for jewelry welding and a welding chamber and a laser welding head installed on the machine body, and the laser welding head welds the jewelry in the welding chamber, and a microscope for observing the jewelry welding is installed on the machine body, characterized in that: a protective head for spraying gas is installed at the laser emission end of the laser welding head, and the protective head sprays inert gas to evacuate the air at the welding position.

[0006] The bottom end of the welding chamber is provided with an adjusting head, which is located directly below the laser welding head. The inert gas is sprayed by the adjusting head and the protective head together, so that the inert gas collides at the same speed, the airflow impact force is cancelled out, and the inert gas is diffused to evacuate the air at the welding position.

[0007] The pipeline connected with the protection head is provided with an A electromagnetic valve, and the release of the inert gas on the protection head is controlled through the A electromagnetic valve.

[0008] The adjusting head extends to the inside of the machine body through the pipeline and is provided with a B electromagnetic valve, and the release of the inert gas on the adjusting head is controlled through the B electromagnetic valve. The inside of the machine body is provided with an atomizer, and the atomizer is communicated with the pipeline connected with the adjusting head through a pipeline, so that the inert gas carries the atomized water out during the release process, and the welding position is cooled through the atomized water after welding. The adjusting head can control the on-off of the A electromagnetic valve, the B electromagnetic valve and the atomizer.

[0009] Preferably, the protection head comprises a metal sleeve connected with the laser welding head, a threaded bin is arranged at the top end of the metal sleeve, and the metal sleeve is connected with the laser welding head through the inner wall thread of the threaded bin. A gas guide port extending into the threaded bin is arranged on the outer side of the metal sleeve. A light outlet for laser passing through is arranged in the middle of the metal sleeve. A plurality of groups of exhaust ports distributed around the light outlet are arranged on the metal sleeve, and the inert gas is discharged through the plurality of groups of exhaust ports.

[0010] Preferably, the top end of the light outlet abuts against the laser emitting end of the laser welding head through a sealing ring, so that the inert gas is guided out from the plurality of groups of exhaust ports.

[0011] Preferably, the protection head further comprises a ring groove arranged on the side surface of the metal sleeve, and a wire groove is arranged on the surface of the ring groove and distributed around. A heat dissipation pipe is arranged in the wire groove. The ring groove on the side surface of the protection head is connected through two semicircular rings. One end of the heat dissipation pipe is connected with the gas guide port through a pipeline, and the other end of the heat dissipation pipe extends into the threaded bin. The inert gas is guided into the threaded bin through the gas guide port, discharged through the exhaust port, and carries away the heat of the metal sleeve. At the same time, the inert gas guided into the threaded bin is guided into the heat dissipation pipe to cool the side surface of the metal sleeve. Finally, the inert gas is guided into the threaded bin.

[0012] Preferably, the adjusting head comprises a positioning sleeve arranged at the bottom of the welding bin. A side connecting pipe extending into the inside of the machine body is arranged at the bottom of the side surface of the positioning sleeve. A rotatable internal thread ring is arranged at the top end of the positioning sleeve extending into the inside of the welding bin. An adjustable threaded pipe is arranged in the positioning sleeve. A piston is arranged at the bottom end of the threaded pipe. The threaded pipe slides on the inner wall of the positioning sleeve through the piston. A rotatable positioning head is arranged at the top end of the positioning sleeve. A plurality of groups of air holes for discharging inert gas are arranged on the positioning head. An anti-torque structure is arranged in the threaded pipe.

[0013] Preferably, the anti-torque structure comprises a bracket arranged in the inside of the positioning sleeve. The top end of the threaded pipe is rotationally connected with the positioning head through a shaft core. A spline shaft is arranged at the bottom end of the bracket. A slidable shaft sleeve is arranged at the bottom end of the spline shaft, and the bottom end of the shaft sleeve is connected with the bottom end of the positioning sleeve.

[0014] Preferably, the top end of the threaded pipe is provided with two A contactors L, two B contactors L, two C contactors L and two D contactors L in an annular array, and the two A contactors L, the two B contactors L and the two C contactors L are extended to the inside of the machine body through wires, and the bottom end of the positioning head is provided with two E contactors L, and the two E contactors L are communicated through wires.

[0015] Preferably, the bottom end of the positioning head is provided with two symmetrically distributed notches, and the two E contactors L slide up and down in the two notches.

[0016] Preferably, the A contactor L, the B contactor L, the C contactor L, the D contactor L and the E contactor L are all made of magnetic conductive material.

[0017] When the two E contactors L contact the two A contactors L, the atomizer and the B electromagnetic valve are powered on, the inert gas containing water mist in the adjusting head is released to cool the jewelry;

[0018] When the two E contactors L contact the two B contactors L, the A electromagnetic valve and the B electromagnetic valve are powered on, the inert gas is discharged from the protection head and the adjusting head to protect the jewelry from the upper and lower parts, and the gas protection area is increased;

[0019] When the two E contactors L contact the two C contactors L, the B electromagnetic valve is powered on, the inert gas in the adjusting head is released to protect the jewelry from below, and the release amount of the inert gas is reduced.

[0020] When the two E contactors L contact the two D contactors L, the A electromagnetic valve, the B electromagnetic valve and the atomizer are all stopped.

[0021] A jewelry microscopic welding method, the specific operation is as follows:

[0022] S1, during the welding process of the jewelry, the adjusting head is adjusted, the A electromagnetic valve and the B electromagnetic valve are opened, the inert gas is discharged from the protection head and the adjusting head, the jewelry is welded under the inert gas cover, and after welding, the adjusting head is adjusted again, the atomizer and the B electromagnetic valve are opened, and the inert gas containing water mist in the adjusting head is released to cool the jewelry.

[0023] S2, the B electromagnetic valve can be opened alone through the adjusting head, the inert gas in the adjusting head is released to protect the jewelry from below, the release amount of the inert gas is reduced, and at the same time, the A electromagnetic valve and the B electromagnetic valve and the atomizer can be closed through the adjusting head.

[0024] Compared with the prior art, the present application has the following beneficial effects:

[0025] (1) The protective head and the adjusting head work in coordination to form a strong and uniform inert gas protection layer around the welding position. The protective head discharges inert gas from above, and the adjusting head discharges inert gas from below, and the two collide at the same speed and offset the airflow impact force. Not only is the air around the welding position exhausted to avoid oxidation reaction of the jewelry with oxygen during welding and prevent surface oxidation and discoloration, but also the gas coverage area is strengthened to destroy the ion layer and ensure that the welding process is not disturbed by external air, greatly improving the welding quality.

[0026] (2) The protective head is designed in a unique way, such as the exhaust port design and the ring groove on the side of the metal sleeve and the laying of the heat dissipation pipe, which uses the imported inert gas to cool the metal sleeve. During continuous welding operation, the high temperature of the protective head caused by laser irradiation can be effectively reduced to ensure normal operation and service life, reduce equipment failure caused by overheating, and improve the stability of the equipment

[0027] (3) The design of the height of the adjusting head can easily hold the jewelry on the saddle during welding to avoid shaking when holding by hand. By rotating the adjusting head, various gas protection and cooling functions can be achieved, such as strengthening gas coverage during welding, cooling the jewelry after welding, and reducing the release amount of inert gas according to special requirements for the amount of inert gas to meet the needs of different jewelry welding processes, with strong flexibility. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a schematic diagram of the overall structure of the present application;

[0029] Figure 2 is a schematic diagram of the structure of the laser welding head and the welding chamber of the present application;

[0030] Figure 3 is a schematic diagram of the structure of the protective head of the present application;

[0031] Figure 4 is a schematic diagram of the split structure of the present application Figure 3 ;

[0032] Figure 5 is a schematic diagram of the structure of the adjusting head of the present application;

[0033] Figure 6 is a schematic diagram of the split structure of the adjusting head of the present application;

[0034] Figure 7 is a schematic diagram of the anti-torque structure of the present application;

[0035] Figure 8 is a schematic diagram of the positioning head structure of the present application;

[0036] Figure 9 is a schematic diagram of the structure of the threaded pipe end of the present application;

[0037] Figure 10 The schematic diagram of the circuit connection structure of the present application.

[0038] In the figure: 1, body; 2, welding bin; 3, laser welding head; 4, microscope; 5, protective head; 6, adjusting head; 7, A electromagnetic valve; 8, B electromagnetic valve; 9, atomizer; 51, metal sleeve; 52, threaded bin; 53, air guide port; 54, light outlet; 55, exhaust port; 56, ring groove; 57, heat dissipation pipe; 58, semicircular ring; 61, positioning sleeve; 62, side connecting pipe; 63, internal threaded ring; 64, threaded pipe; 65, piston; 66, positioning head; 67, air hole; 68, torque protection structure; 681, bracket; 682, spline shaft; 683, shaft sleeve; L1, A contact; L2, B contact; L3, C contact; L4, D contact; L0, E contact. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the embodiments of the present disclosure clearer, the technical scheme of the embodiments of the present disclosure will be described clearly and completely below in combination with the drawings of the embodiments of the present disclosure. In order to keep the following description of the embodiments of the present disclosure clear and brief, the present disclosure omits the detailed description of known functions and known components to avoid unnecessary confusion of the concept of the present invention.

[0040] Please refer to Figure 1 and Figure 2 A jewelry microscopic welding device is composed of a body 1, a welding bin 2, a laser welding head 3, a microscope 4, a protective head 5, an adjusting head 6, and related control components such as an A electromagnetic valve 7, a B electromagnetic valve 8, an atomizer 9, etc.

[0041] The body 1 serves as the bearing main body of the entire device, which is made of high-strength and stable metal material, providing a solid installation foundation for other components. The welding bin 2 is firmly installed on the body 1, and its internal space provides a special working area for jewelry welding operations, which can effectively prevent the strong light and splashes generated during the welding process from affecting the external environment. The laser welding head 3 is installed at a suitable position of the body 1, ensuring that the laser beam emitted by it can accurately irradiate the jewelry welding position in the welding bin 2, realizing high-quality welding operation. The microscope 4 is also installed on the body 1, which is convenient for the operator to observe the fine structure of the jewelry and the welding position in real time during the welding process, ensuring the precision and quality of the welding.

[0042] Please refer to Figure 3 and Figure 4 The pipeline connected with the protective head 5 is provided with an A electromagnetic valve 7, and the release of inert gas on the protective head 5 is controlled through the A electromagnetic valve 7.

[0043] The protective head 5 includes a metal sleeve 51, a threaded bin 52, a gas inlet 53, a light outlet 54, an exhaust port 55, a ring groove 56, a heat dissipation pipe 57 and a semi-circular ring 58. The threaded bin 52 at the top end of the metal sleeve 51 is tightly connected with the laser welding head 3 through the inner wall thread, ensuring the stability and sealing of the connection. The gas inlet 53 on the outside of the metal sleeve 51 extends to the inside of the threaded bin 52, providing a channel for the introduction of inert gas. The light outlet 54 is located in the middle of the metal sleeve 51, ensuring that the laser can pass through smoothly and act on the jewelry welding position. Several groups of exhaust ports 55 are evenly distributed around the light outlet 54, which are used to exhaust inert gas, so that the gas surrounds the laser and is exhausted, the laser is coated, the air outside the laser is exhausted, and the surface of the jewelry is prevented from being oxidized and discolored during the welding process.

[0044] The ring groove 56 is opened on the side of the metal sleeve 51, and the heat dissipation pipe 57 is laid in the surface ring distribution track groove. The ring groove 56 on the side of the protective head 5 is connected by two semi-circular rings 58, which plays a protective and fixing role for the heat dissipation pipe 57. One end of the heat dissipation pipe 57 is connected with the gas inlet 53 through a pipeline, and the other end extends into the threaded bin 52. When the inert gas is introduced from the gas inlet 53, part of it directly enters the threaded bin 52 and is exhausted through the exhaust port 55. In this process, the inert gas can carry away the heat generated by the laser irradiation of the metal sleeve 51. At the same time, the other part of the inert gas enters the heat dissipation pipe 57 to cool the side of the metal sleeve 51, and finally enters the threaded bin 52.

[0045] For example, during continuous welding operation, the continuous work of the laser welding head 3 will cause the temperature of the protective head 5 to rise. At this time, the inert gas circulating in the heat dissipation pipe 57 can effectively reduce the temperature of the protective head 5, and the inert gas can also be cooled through the exhaust port 55, ensuring its normal work and service life.

[0046] The top end of the light outlet 54 is tightly pressed against the laser emitting end of the laser welding head 3 through a sealing ring, ensuring that the inert gas can only be discharged from the several groups of exhaust ports 55. When the A electromagnetic valve 7 is opened, the inert gas enters the protective head 5 from the gas inlet 53, is sprayed out at a certain flow rate through the exhaust port 55, and the air around the welding position is exhausted, forming an inert gas protection area, preventing the jewelry from reacting with oxygen in the air during the welding process, and improving the welding quality.

[0047] Referring to Figure 5 , the adjusting head 6 extends to the inside of the machine body 1 through a pipeline and is installed on the B electromagnetic valve 8. The release of inert gas on the adjusting head 6 is controlled by the B electromagnetic valve 8. The inside of the machine body 1 is provided with an atomizer 9, and the atomizer 9 is communicated with the pipeline connected with the adjusting head 6 through a pipeline, so that the inert gas carries atomized water out during the release process, and the welding position is cooled by the atomized water after welding. The adjusting head 6 can control the on-off of the A electromagnetic valve 7, the B electromagnetic valve 8 and the atomizer 9.

[0048] Referring to Figure 6 , the adjusting head 6 comprises a positioning sleeve 61, a side connecting pipe 62, an internally threaded ring 63, a threaded pipe 64, a piston 65, a positioning head 66, air holes 67, and an anti-torque structure 68. The positioning sleeve 61 is installed at the bottom of the welding chamber 2, and the side connecting pipe 62, which is connected to the bottom of the side of the positioning sleeve 61, extends into the body 1 for connecting to an external source of inert gas and the atomizer 9. The top end of the positioning sleeve 61 extends into the welding chamber 2 and is provided with the rotatable internally threaded ring 63. The threaded pipe 64 in the positioning sleeve 61 slides on the inner wall of the piston 65, and the bottom end of the threaded pipe 64 is provided with the piston 65 outside, which ensures the sealing of the gas passage. The top end of the positioning sleeve 61 is provided with the rotatable positioning head 66, and the positioning head 66 is provided with a plurality of groups of air holes 67 for discharging inert gas. By rotating the internally threaded ring 63, the height of the threaded pipe 64 can be adjusted, thereby adjusting the height of the positioning head 66. During the welding process, the jewelry can be placed on the positioning head 66 for welding, and the positioning head 66 can prevent the jewelry from shaking during the holding process. If the positioning head 66 is adjusted to the lowest position, the welding will not be affected.

[0049] Referring to Figure 7 , the anti-torque structure 68 is composed of a bracket 681, a spline shaft 682, and a shaft sleeve 683. The bracket 681 is installed inside the positioning sleeve 61, and the top end of the threaded pipe 64 is rotatably connected to the positioning head 66 through the shaft core. The bottom end of the bracket 681 is provided with the spline shaft 682, the bottom end of the spline shaft 682 is provided with the slidable shaft sleeve 683, and the bottom end of the shaft sleeve 683 is connected to the bottom end of the positioning sleeve 61. When the threaded pipe 64 moves up and down in the positioning sleeve 61, the anti-torque structure 68 can effectively prevent the threaded pipe 64 from being twisted, ensuring its stable operation. For example, during the adjustment process of the adjusting head 6, the lifting action of the threaded pipe 64 may be twisted due to uneven force, and the anti-torque structure 68 can eliminate this tendency, ensuring the accuracy and stability of the adjustment.

[0050] Both the A solenoid valve 7 and the B solenoid valve 8 are direct-acting solenoid valves. When the coil is energized, the direct-acting solenoid valve lifts the closing member from the valve seat under the electromagnetic force generated by the solenoid, and the valve is opened. When the power is off, the electromagnetic force disappears, and the spring presses the closing member against the valve seat, and the valve is closed.

[0051] Referring to Figure 8 and Figure 9, the top end of the threaded pipe 64 is provided with two A contacts L1, two B contacts L2, two C contacts L3 and two D contacts L4 in an annular array, and the two A contacts L1, two B contacts L2 and two C contacts L3 are extended to the inside of the machine body 1 through wires. The bottom end of the positioning head 66 is provided with two E contacts L0, and the two E contacts L0 are communicated through wires. The bottom end of the positioning head 66 is provided with two symmetrically distributed notches, and the two E contacts L0 slide up and down in the two notches. The A contacts L1, B contacts L2, C contacts L3, D contacts L4 and E contacts L0 are all made of magnetic conductive material, and when the E contacts L0 are adsorbed with the A contacts L1, B contacts L2, C contacts L3 and D contacts L4, the circuit is conducted. When the positioning head 66 is rotated, the E contacts L0 will contact with different contacts, so that different control functions are realized.

[0052] Referring to Figure 10 When the two E contacts L0 contact with the two A contacts L1, the circuit is conducted, and the atomizer 9 and the B electromagnetic valve 8 are powered on. At this time, the B electromagnetic valve 8 is opened, the inert gas enters the positioning sleeve 61 from the side connecting pipe 62, and is discharged through the air holes 67 on the threaded pipe 64 and the positioning head 66. At the same time, the atomizer 9 atomizes the water, so that the inert gas carries the atomized water during the release process, and the jewelry after welding is subjected to cooling treatment.

[0053] When the two E contacts L0 contact with the two B contacts L2, the A electromagnetic valve 7 and the B electromagnetic valve 8 are powered on at the same time. The protection head 5 and the adjusting head 6 work at the same time, the protection head 5 discharges the inert gas from the top, and the adjusting head 6 discharges the inert gas from the bottom, the inert gas collides at the same speed, and the airflow impact force is offset, so that a more uniform and powerful inert gas protection layer is formed around the jewelry, the gas coverage area is strengthened, and the welding process is not disturbed by the external air.

[0054] When the two E contacts L0 contact with the two C contacts L3, the B electromagnetic valve 8 is powered on, and the adjusting head 6 works alone to release the inert gas from the bottom of the jewelry to protect the jewelry. This mode is suitable for the case that the use amount of inert gas has certain requirements and the release amount of inert gas needs to be reduced.

[0055] When the two E contacts L0 contact with the two D contacts L4, the circuits of the A electromagnetic valve 7, the B electromagnetic valve 8 and the atomizer 9 are all cut off, and the equipment stops the corresponding gas discharge and atomization cooling functions.

[0056] The inert gas released can be recycled by setting a gas recycling system, so as to avoid waste of the inert gas, and at the same time, adjusting valves need to be arranged in the gas pipelines connecting the protection head 5 and the adjusting head 6, so that the gas flow rates discharged by the protection head 5 and the adjusting head 6 are the same.

[0057] A jewelry microscopic welding method, the specific operation is as follows:

[0058] Preparation before welding: the jewelry to be welded is placed in the welding chamber 2 in a proper position, the observation angle is adjusted through the microscope 4, and it is ensured that the welding position can be clearly observed. It is checked whether the connection of each part of the equipment is stable, whether the electrical circuit is normal, and whether the inert gas source is sufficient.

[0059] Welding process: the adjusting head 6 is adjusted, the positioning head 66 is rotated, the two E contacts L0 are in contact with the two B contacts L2, at this time the A electromagnetic valve 7 and the B electromagnetic valve 8 are opened. The protection head 5 discharges the inert gas through the exhaust port 55, and the adjusting head 6 discharges the inert gas through the air hole 67, so as to form an inert gas protection area around the welding position. The laser welding head 3 is turned on, the worker holds the jewelry to move and weld, and the operator observes the welding in real time through the microscope 4, so as to ensure the welding quality.

[0060] After the welding is completed, the adjusting head 6 is adjusted again, the positioning head 66 is rotated, the two E contacts L0 are in contact with the two A contacts L1, the atomizer 9 and the B electromagnetic valve 8 are opened. The inert gas containing water mist is released in the adjusting head 6, so as to cool the jewelry after welding, and prevent the jewelry from being deformed or the performance from being changed due to high temperature.

[0061] Flexible gas protection adjustment: in some special cases of inert gas consumption, the positioning head 66 is rotated alone through the adjusting head 6, so that the two E contacts L0 are in contact with the two C contacts L3, at this time the B electromagnetic valve 8 is electrified, the inert gas is released in the adjusting head 6, and the jewelry is protected from below, so as to reduce the release amount of the inert gas. When the gas protection and cooling functions are not needed, the positioning head 66 is rotated, so that the two E contacts L0 are in contact with the two D contacts L4, and the A electromagnetic valve 7, the B electromagnetic valve 8 and the atomizer 9 all stop running.

[0062] Through the above specific embodiments, the jewelry microscopic welding equipment of the present application can realize efficient and high-quality jewelry welding operation, effectively protects the welding position through the cooperation of the protection head 5 and the adjusting head 6, improves the welding quality, and meets the needs of different jewelry welding processes through the flexible gas protection and cooling adjustment functions.

[0063] The above examples are only exemplary embodiments of the present application and are not used to limit the present application, and the protection scope of the present application is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements to the present application within the spirit and protection scope of the present application, and such modifications or equivalent replacements are also regarded as falling within the protection scope of the present application.

Claims

1. A jewelry micro-welding device comprising a machine body (1) for jewelry welding and a welding chamber (2) and a laser welding head (3) mounted on the machine body (1) and welding the jewelry in the welding chamber (2), and a microscope (4) mounted on the machine body (1) for jewelry welding observation, characterized in that: The laser emission end of the laser welding head (3) is provided with a protective head (5) for spraying gas, and the protective head (5) sprays inert gas to exhaust air at the welding position; The bottom end of the welding bin (2) is provided with an adjusting head (6), and the adjusting head (6) is located directly below the laser welding head (3). The adjusting head (6) and the protective head (5) spray inert gas together, so that the inert gas collides at the same speed, the airflow impact force is offset, and the inert gas is diffused to exhaust air at the welding position. The pipeline connected with the protective head (5) is provided with an A electromagnetic valve (7), and the release of inert gas on the protective head (5) is controlled by the A electromagnetic valve (7). The adjusting head (6) extends to the inside of the machine body (1) through a pipeline and is provided with a B electromagnetic valve (8). The release of inert gas on the adjusting head (6) is controlled by the B electromagnetic valve (8). The inside of the machine body (1) is provided with an atomizer (9), and the atomizer (9) is connected with the pipeline connected with the adjusting head (6) through a pipeline. Inert gas carries atomized water out during the release process, so that the welding position is cooled by atomized water after welding. The adjusting head (6) can control the on-off of the A electromagnetic valve (7), the B electromagnetic valve (8) and the atomizer (9). The adjusting head (6) comprises a positioning sleeve (61) provided at the bottom of the welding bin (2). The bottom of the side of the positioning sleeve (61) is connected with a side connecting pipe (62) extending to the inside of the machine body (1). The top end of the positioning sleeve (61) extends to the inside of the welding bin (2) and is provided with a rotatable internal thread ring (63). The positioning sleeve (61) is provided with a movable threaded pipe (64). The bottom end of the threaded pipe (64) is provided with a piston (65). The threaded pipe (64) slides on the inner wall of the positioning sleeve (61) through the piston (65). The top end of the positioning sleeve (61) is provided with a rotatable positioning head (66), and the positioning head (66) is provided with a plurality of groups of gas holes (67) for discharging inert gas. The inside of the threaded pipe (64) is provided with an anti-torque structure (68). The top end of the threaded pipe (64) is provided with two A contacts (L1), two B contacts (L2), two C contacts (L3) and two D contacts (L4) arranged in an annular array. Two A contacts (L1), two B contacts (L2) and two C contacts (L3) extend to the inside of the machine body (1) through wires. The bottom end of the positioning head (66) is provided with two E contacts (L0), and the two E contacts (L0) are connected through wires. The A contacts (L1), B contacts (L2), C contacts (L3), D contacts (L4) and E contacts (L0) are made of magnetic conductive material. When the two E contacts (L0) and the two A contacts (L1) are in contact, the atomizer (9) and the B electromagnetic valve (8) are powered on, and the inert gas containing water mist in the adjusting head (6) is released to cool the jewelry. When the two E contacts (L0) are in contact with the two B contacts (L2), the A electromagnetic valve (7) and the B electromagnetic valve (8) are powered on, the protection head (5) and the adjusting head (6) jointly discharge inert gas, and the inert gas is discharged from the upper and lower parts of the jewelry to protect the jewelry. When the two E contacts (L0) are in contact with the two C contacts (L3), the B electromagnetic valve (8) is powered on, the adjusting head (6) releases inert gas, and the inert gas is discharged from the lower part of the jewelry to protect the jewelry. When the two E contacts (L0) are in contact with the two D contacts (L4), the A electromagnetic valve (7) and the B electromagnetic valve (8) and the atomizer (9) are all stopped.

2. A jewelry micro welding apparatus according to claim 1, characterized in that: The protection head (5) comprises a metal sleeve (51) connected with the laser welding head (3), a threaded bin (52) is installed at the top end of the metal sleeve (51), and the metal sleeve (51) is threadedly connected with the laser welding head (3) through the inner wall of the threaded bin (52). A gas guide port (53) extending into the threaded bin (52) is installed on the outer side of the metal sleeve (51), a light outlet (54) for laser passing through is arranged in the middle of the metal sleeve (51), and a plurality of groups of exhaust ports (55) distributed around the light outlet (54) are formed in the metal sleeve (51), and inert gas is discharged through the plurality of groups of exhaust ports (55).

3. A jewelry micro welding apparatus according to claim 2, characterized in that: The top end of the light outlet (54) is abutted against the laser emitting end of the laser welding head (3) through a sealing ring, so that the inert gas is guided out of the plurality of groups of exhaust ports (55).

4. A jewelry microscopic welding apparatus according to claim 2, characterized in that: The protection head (5) further comprises a ring groove (56) formed in the side surface of the metal sleeve (51), a wire groove is formed on the surface of the ring groove (56) and distributed around, a heat dissipation pipe (57) is laid in the wire groove, the ring groove (56) on the side surface of the protection head (5) is connected through two semicircular rings (58), one end of the heat dissipation pipe (57) is connected with the gas guide port (53) through a pipeline, the other end of the heat dissipation pipe (57) extends into the threaded bin (52), so that the inert gas is guided into the threaded bin (52) through the gas guide port (53) and discharged through the exhaust port (55), and the heat of the metal sleeve (51) is taken away at the same time. Meanwhile, the inert gas guided into the threaded bin (52) through the gas guide port (53) is guided into the heat dissipation pipe (57), so that the side surface of the metal sleeve (51) is cooled, and finally the inert gas is guided into the threaded bin (52).

5. The jewelry microscopic welding apparatus according to claim 1, characterized in that: The anti-torque structure (68) comprises a support (681) installed in the positioning sleeve (61), the top end of the threaded pipe (64) is rotationally connected with the positioning head (66) through a shaft core, the bottom end of the support (681) is provided with a spline shaft (682), and the bottom end of the spline shaft (682) is provided with a slidable shaft sleeve (683), and the bottom end of the shaft sleeve (683) is connected with the bottom end of the positioning sleeve (61).

6. The jewelry microscopic welding apparatus according to claim 1, wherein: The bottom end of the positioning head (66) is provided with two symmetrically distributed notches, and the two E contacts (L0) slide up and down in the two notches.

7. A method of jewelry micro welding, characterized by, The jewelry micro-welding device of any one of claims 1-6 is used, and the specific operation is as follows: S1, in the process of welding jewelry, the adjusting head (6) is adjusted, the A solenoid valve (7) and the B solenoid valve (8) are opened, the protection head (5) and the adjusting head (6) jointly discharge inert gas, the jewelry is welded under the coverage of the inert gas, and the adjusting head (6) is adjusted again after the welding, the atomizer (9) and the B solenoid valve (8) are opened, and the inert gas containing water mist is released in the adjusting head (6) to cool the jewelry; S2, the B solenoid valve (8) can be opened alone through the adjusting head (6), the inert gas is released in the adjusting head (6), the jewelry is protected from below, the release amount of the inert gas is reduced, and meanwhile, the A solenoid valve (7) and the B solenoid valve (8) and the atomizer (9) can be closed at the same time through the adjusting head (6).

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