Laser welding tool for thrust foil air bearing

Abstract

The utility model relates to a laser welding tool for a thrust foil air bearing, which comprises a tool base, a positioning groove is arranged at the center of the tool base, four guide grooves are arranged on the periphery of the positioning groove, and a welding pressing plate matched with the positioning groove is arranged on the upper portion of the positioning groove. The working base is internally provided with an electromagnet attraction pressing structure matched with the positioning groove, the electromagnet attraction pressing structure comprises an electromagnet and an electromagnet switch used for controlling current, a movable pressing rod is arranged above the electromagnet, and the center of the positioning groove is provided with a through hole matched with the pressing rod. When the tool is used, an electromagnet adsorption pressing structure matched with the positioning groove is arranged in the working base, a thrust foil air bearing is placed between the tool base and the welding pressing plate, the positioning accuracy of parts is improved through the positioning groove and the guide groove, the welding quality is improved through effective pressing of the welding pressing plate, meanwhile, the whole tool is integrally designed, and the machining efficiency is improved. And the manufacturing and maintenance cost of the tool is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of laser welding jigs, and particularly to a laser welding jig for a thrust foil gas bearing. Background Art

[0002] A foil gas bearing is a hydrodynamic bearing supported by an adaptive elastic foil, and its elastic support structure consists of one or more wave foils and a top foil, which are divided into two types: radial and thrust bearings. It has many advantages, such as small mass, high reliability, great design freedom, good high-temperature characteristics, low maintenance or no maintenance, etc. It can solve many limitations of traditional oil-impregnated bearings in applications, achieve "oil-free" of mechanical equipment, and can adapt to changes in bearing clearance caused by different local gas film pressures. Currently, it has extremely broad development prospects and application values in the fields of turbomachinery, micro-compressor systems, air circulation systems, small aero-engines, micro gas turbines, oil-free air compressors for fuel cells, and vehicle-mounted turbochargers at home and abroad.

[0003] With the increasingly wide application of air bearings, the requirements for the manufacturing process of air bearings are also getting higher and higher, and the standardization of manufacturing, the stability and consistency of the process are gradually being emphasized. Currently, the foil-type gas thrust bearing is formed by welding the top foil, wave foil and bottom plate. Most of them adopt the laser welding process, which has the characteristics of small welding spots, low input heat and small influence area. Since it is a non-contact welding, it is very suitable for welding parts such as foil-type gas thrust bearings with small size, thin walls and easy deformation. However, when there is a gap between the two welded parts, problems such as "false welding" are likely to occur in laser welding, resulting in a sharp drop in the quality of the welding spots and ultimately affecting the product quality.

[0004] Therefore, there is an urgent need in the market for a laser welding jig for a thrust foil gas bearing to improve the welding quality and efficiency. Summary of the Invention

[0005] The purpose of the utility model is to provide a laser welding jig for a thrust foil gas bearing, which can ensure the consistency of the welding process of the thrust bearing and the stability of the product quality through structural improvement, and at the same time greatly improve the production efficiency.

[0006] To achieve the above object, the technical solution of the utility model is: a laser welding tooling for a thrust foil gas bearing, which is used for laser welding a thrust foil gas bearing, and is characterized in that: the laser welding tooling includes a tooling base, a positioning groove is provided at the center of the tooling base, 4 guiding grooves are provided around the positioning groove, and a welding pressing plate matching with the positioning groove is provided above the positioning groove; an electromagnet adsorption pressing structure matching with the positioning groove is arranged in the working base, the electromagnetic adsorption pressing structure includes an electromagnet and an electromagnet switch for controlling the current, a movable pressing rod is arranged above the electromagnet, and a through hole matching with the pressing rod is arranged at the center of the positioning groove.

[0007] Preferably, the bottom of the electromagnet is fixed in the working base through an electromagnet locking retaining ring, an electromagnet positioning retaining ring is arranged closely on the top of the electromagnet, a pressing rod adjusting hole is arranged at the center of the electromagnet positioning retaining ring, and the gap between the pressing rod and the electromagnet is adjusted by the up and down displacement of the electromagnet positioning retaining ring; the pressing rod includes a positioning end and a connecting rod connected to the positioning end, and the bottom of the connecting rod cooperates with the electromagnet; the bottom diameter of the positioning end is larger than the diameter of the through hole.

[0008] Furthermore, the guiding grooves are symmetrically arranged in pairs with the positioning groove as the center, and the two groups of guiding grooves are perpendicular to each other; positioning parts are arranged around the laser welded thrust foil gas bearing, and the size of the guiding grooves matches that of the positioning parts.

[0009] Furthermore, an electromagnet power supply connector is connected to the side of the electromagnet, and an electromagnet switch is arranged on the side of the working base.

[0010] Furthermore, a positioning hole matching with the positioning end is arranged at the center of the welding pressing plate, welding hole positions are arranged on the welding pressing plate, and a pressing beam is arranged in cooperation with the welding hole positions to eliminate the gap in the welding area.

[0011] Even further, a thrust bearing bottom plate, a thrust bearing cushion block, a thrust bearing wave foil and a thrust bearing top foil are sequentially placed between the positioning groove and the welding pressing plate.

[0012] Compared with the prior art, in addition to the improvement of the overall technical solution, the technical solution of the utility model also includes many improvements in details. Specifically, it has the following beneficial effects:

[0013] 1. In the improvement scheme of the utility model, the laser welding tooling includes a tooling base, a positioning groove is provided at the center of the tooling base, 4 guiding grooves are provided around the positioning groove, and a welding pressing plate matching with the positioning groove is provided above the positioning groove; an electromagnet adsorption pressing structure matching with the positioning groove is arranged in the working base. By placing the parts to be welded between the tooling base and the welding pressing plate, the positioning accuracy of the parts is improved, the welding quality is enhanced, and at the same time, the whole tooling adopts an integrated design, reducing the manufacturing and maintenance costs of the tooling.

[0014] 2. In the technical solution of the present utility model, the electromagnetic adsorption and pressing structure includes an electromagnet and an electromagnet switch for controlling the current. A movable pressing rod is provided above the electromagnet, and a through hole matching the pressing rod is provided at the center of the positioning groove. By the way of pressing with the electromagnet, the parts to be welded can be fixed, which can improve the positioning accuracy and welding precision, and enhance the welding quality.

[0015] 3. In the structure of the present utility model, the guiding grooves are symmetrically arranged in pairs centered on the positioning groove, and the two groups of guiding grooves are perpendicular to each other; positioning parts are provided around the laser welding thrust foil gas bearing, and the size of the guiding grooves matches the positioning parts, ensuring accurate and stable positioning during the welding process, enabling the parts to be welded to be stacked and positioned precisely in sequence, ensuring the quality of subsequent welding. At the same time, the operation is convenient, saving a large amount of precise positioning time and improving the welding efficiency.

[0016] 4. The structure of the present utility model is simple, reasonably arranged, easy to use, and has a low cost, which is convenient for popularization and utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the dispersed structure after assembly of the present utility model.

[0018] Figure 2 It is a schematic diagram of the mating structure between the thrust foil gas bearing and the working base of the present utility model.

[0019] Figure 3 It is a schematic diagram of the structure after the welding pressing plate is installed in the present utility model.

[0020] Figure 4 It is a schematic cross-sectional structure diagram of an embodiment of the present utility model.

[0021] REFERENCE NUMERALS:

[0022] 1 Tooling base, 2 Thrust foil gas bearing, 3 Welding pressing plate, 4 Thrust bearing bottom plate, 5 Thrust bearing cushion block, 6 Thrust bearing wave foil, 7 Thrust bearing top foil, 8 Pressing rod, 9 Electromagnet positioning retaining ring, 10 Electromagnet;

[0023] 11 Electromagnet power supply connector, 12 Electromagnet locking retaining ring, 13 Electromagnet switch, 14 Positioning groove, 15 Guiding groove;

[0024] 81 Positioning end, 82 Connecting rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0026] The present utility model provides a laser welding tooling for a thrust foil gas bearing, which is used for laser welding the thrust foil gas bearing. Specifically, refer to Figure 1 , which is different from the prior art in that: the laser welding tooling includes a tooling base 1. The tooling base is in a box structure. There is a concave positioning groove 14 at the center of the tooling base. There are 4 guide grooves 15 around the positioning groove. The 4 guide grooves are arranged in a cross-shaped layout structure and are disposed around the positioning groove 14. There is a welding pressing plate 3 that cooperates with the positioning groove 14 above the positioning groove. During implementation, the thrust foil gas bearing to be welded is placed between the positioning groove 14 and the welding pressing plate 3. Through the positioning cooperation between the positioning groove and the welding pressing plate, the thrust foil gas bearing to be welded is firmly fixed within a compressed space range. At the same time, due to the ingenious structure of the welding pressing plate, the welding work is not affected.

[0027] Specifically, an electromagnet adsorption pressing structure that cooperates with the positioning groove is provided inside the working base. The electromagnet adsorption pressing structure includes an electromagnet 10 and an electromagnet switch 13 for controlling the current. There is a movable pressing rod 8 above the electromagnet. There is a through hole that cooperates with the pressing rod at the center of the positioning groove. The positioning end of the pressing rod exposes the through hole and cooperates with the welding pressing plate. The thrust foil gas bearing is sleeved on the pressing rod in sequence and is limited within the space between the positioning groove and the welding pressing plate. Through the cooperation and pressing between the positioning groove and the welding pressing plate, the gap between adjacent thrust foil gas bearings to be welded can be effectively eliminated, and the problem of virtual welding can be solved. At the same time, the cooperation between the two can also effectively and accurately position, facilitating the subsequent development of the welding tooling.

[0028] Embodiment 1

[0029] A laser welding tooling for a thrust foil gas bearing of the utility model is used for laser welding the thrust foil gas bearing. Among them, the laser welding tooling includes a tooling base 1. A concave circular positioning groove 14 is provided at the center of the tooling base. The structure of the positioning groove matches the structure of the welded thrust foil gas bearing. Four guiding grooves 15 are provided around the positioning groove and are evenly distributed along the outer circumference of the positioning groove. A welding pressing plate 3 that matches the positioning groove is provided above the positioning groove. An electromagnet adsorption and pressing structure that matches the positioning groove is provided inside the working base. The electromagnetic adsorption and pressing structure includes an electromagnet 10 and an electromagnet switch 13 for controlling the current. A movable pressing rod 8 is provided above the electromagnet. A through hole that matches the pressing rod is provided at the center of the positioning groove. The electromagnetic adsorption and pressing structure here cooperate with the welding pressing plate, so that under the adsorption of the electromagnetic force, the welding pressing plate forms an effective downward pressure, which not only provides an effective and stable fastening effect for welding, but also avoids the problem of false welding. At the same time, since the suction force provided each time can be made consistent after the electromagnetic force is adjusted, this ensures that the downward pressure of the welding pressing plate can remain stable during the welding process of the same parts, thereby improving the stability of the welding quality.

[0030] Specifically, the bottom of the electromagnet 10 is fixed inside the working base through an electromagnet locking retaining ring 12. An electromagnet positioning retaining ring 9 that is in close contact with it is provided at the top of the electromagnet. A pressing rod adjusting hole is provided at the center of the electromagnet positioning retaining ring 9, through which the pressing rod can pass and be adsorbed by the electromagnet. Then, by moving the electromagnet positioning retaining ring 9 up and down, the gap between the pressing rod and the electromagnet can be adjusted. By changing the gap, the magnetic force received by the pressing rod can be adjusted. By adjusting the magnetic force, different downward pressures are generated on the welding pressing plate, so that the welding tooling is suitable for the process requirements of different welded parts. Further, the pressing rod 8 includes a positioning end 81 and a connecting rod 82 connected to the positioning end. The bottom of the connecting rod cooperates with the electromagnet; the bottom diameter of the positioning end is larger than the diameter of the through hole, ensuring that the positioning end can be stable in the positioning groove.

[0031] Further, the guiding grooves 15 are symmetrically arranged in pairs with the positioning groove 14 as the center. The two groups of guiding grooves are perpendicular to each other in a cross shape, and the 4 guiding grooves are evenly distributed along the outer circumference of the positioning groove; positioning parts are provided around the laser welding thrust foil gas bearing. The size of the guiding grooves matches the positioning parts, so that the various parts of the laser welding thrust foil gas bearing placed on the positioning groove can be placed in sequence, and then positioned quickly and accurately, improving the welding quality and accuracy. The various parts of the welded thrust foil gas bearing here include a thrust bearing bottom plate 4, a thrust bearing spacer 5, a thrust bearing wave foil 6, and a thrust bearing top foil 7.

[0032] Furthermore, a positioning hole for cooperating with the positioning end is provided at the center of the welding pressing plate 3. Through the pressing rod, the welding pressing plate and the positioning groove are also precisely positioned. Welding hole positions are provided on the welding pressing plate, and pressing beams are cooperatively arranged at the welding hole positions to eliminate the gap in the welding area.

[0033] Furthermore, an electromagnet power supply connector 11 is connected to the side of the electromagnet 10, and an electromagnet switch 13 is provided on the side of the working base. The electromagnetic force is turned on or off through the electromagnet switch.

[0034] Embodiment 2

[0035] In this embodiment, Figure 1 The positioning of the thrust foil gas bearing 2 and the welding tooling is shown. The thrust foil gas bearing 2 is placed on the tooling base 1, and the thrust foil gas bearing 2 is precisely positioned through the positioning groove 14.

[0036] Figure 2 Among them, the welding pressing plate 3 at the center part is placed on the thrust foil gas bearing 2, leaving laser welding hole positions, and pressing beams are added near the welding hole positions to enhance the pressing effect, further eliminating the gap in the welding area and avoiding "false welding".

[0037] Figure 3 The welding positioning and pressing methods of each part of the laser welded thrust bearing are shown. Each component of the thrust foil gas bearing 2 includes a thrust bearing bottom plate 4, a thrust bearing spacer 5, a thrust bearing wave foil 6, and a thrust bearing top foil 7. During welding, each part is welded together in sequence. All welded parts are positioned by the guide groove 15, and the same positioning method improves the positioning accuracy of the parts and reduces the complexity of the tooling. At the same time, the same welding pressing plate is used for all welded parts during welding.

[0038] Figure 4 It is an electromagnet adsorption and pressing structure. When an external power supply is connected to this structure, the electromagnet switch 13 is turned on, the electromagnet 10 is energized to generate magnetism, the pressing rod 8 is attracted by the magnetic force and moves downward, and the welding pressing plate 3 is subjected to the pressure of the pressing rod 8. This pressure is transmitted downward step by step, and finally the welded part is pressed on the tooling base 1. When welding is completed, the electromagnet 10 loses its magnetism, the pressing rod 8 is not affected by the magnetic force, and no longer applies pressure to the welding pressing plate 3. The pressing rod 8 and the welding pressing plate 3 can be removed, and a new welded part can be replaced to continue welding. During the welding process, the pressure received by the welded part is provided by the electromagnet, ensuring the consistency of the welding pressure each time, thereby improving the stability of the welding quality.

[0039] The electromagnet positioning retaining ring 9 is used to limit the position of the electromagnet. When the length of the pressing rod 8 is fixed, adjusting the up and down displacement of the electromagnet positioning retaining ring 9 can change the magnetic force received by the pressing rod 8, thereby adjusting the pressing force received by the welded part.

[0040] Specifically, the gap size between the electromagnet 10 and the bottom of the pressing rod 8 results in different magnetic forces on the pressing rod 8. The magnetic force is the largest when the gap is zero, and increasing the gap will reduce the magnetic force, thereby changing the pressure of the pressing rod on the workpiece to be welded. Workpieces of different thicknesses may have different pressure requirements during laser welding. Since the electromagnet 10 is always in close contact with the electromagnet positioning retaining ring 9, the gap size between the electromagnet 10 and the pressing rod 8 can be adjusted by changing the up and down displacement of the electromagnet positioning retaining ring 9, changing the pressure of the pressing rod 8 on the thrust foil gas bearing 2, and finally realizing the function of adjusting the pressing force on the thrust foil gas bearing 2.

[0041] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention pertains, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should all be regarded as belonging to the protection scope of the present invention.

Claims

1. A laser welding tooling for a thrust foil air bearing, which is used for laser welding the thrust foil air bearing, and is characterized in that: The laser welding tooling includes a tooling base. A positioning groove is provided at the center of the tooling base. Four guiding grooves are arranged around the positioning groove. A welding pressure plate that mates with the positioning groove is provided above the positioning groove. An electromagnet adsorption and pressing structure that mates with the positioning groove is provided inside the working base. The electromagnetic adsorption and pressing structure includes an electromagnet and an electromagnet switch for controlling the current. A movable pressing rod is provided above the electromagnet. A through hole that mates with the pressing rod is provided at the center of the positioning groove.

2. The laser welding tooling for a thrust foil gas bearing according to claim 1, wherein: The bottom of the electromagnet is fixed inside the working base through an electromagnet locking retaining ring. An electromagnet positioning retaining ring that closely adheres to it is provided at the top of the electromagnet. A pressing rod adjusting hole is provided at the center of the electromagnet positioning retaining ring. The gap between the pressing rod and the electromagnet is adjusted by the up and down displacement of the electromagnet positioning retaining ring. The pressing rod includes a positioning end and a connecting rod connected to the positioning end. The bottom of the connecting rod mates with the electromagnet. The bottom diameter of the positioning end is larger than the diameter of the through hole.

3. The laser welding tooling for a thrust foil gas bearing according to claim 1, characterized in that: The guiding grooves are symmetrically arranged in pairs with the positioning groove as the center. The two groups of guiding grooves are perpendicular to each other. Positioning parts are provided around the laser welding thrust foil air foil bearing. The size of the guiding grooves mates with the positioning parts.

4. A laser welding tooling for a thrust foil gas bearing according to claim 1, characterized in that: An electromagnet power supply connector is connected to the side of the electromagnet. An electromagnet switch is provided on the side of the working base.

5. A laser welding tooling for a thrust foil gas bearing according to claim 2, characterized in that: A positioning hole that mates with the positioning end is provided at the center of the welding pressure plate. Welding hole positions are provided on the welding pressure plate. A pressing beam is provided in cooperation with the welding hole positions, so as to eliminate the gap in the welding area.

6. A laser welding tooling for a thrust foil gas bearing according to claim 1, characterized in that: A thrust bearing bottom plate, a thrust bearing spacer block, a thrust bearing wave foil, and a thrust bearing top foil are sequentially placed between the positioning groove and the welding pressure plate.

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