A carbon dioxide laser tube

Abstract

The utility model discloses a kind of carbon dioxide laser tubes, it is related to laser tube technical field, including discharge tube, discharge tube attachment support, water cooling pipe, gas return pipe, gas storage pipe, total reflection mirror, total reflection mirror pipe orifice, anode, anode tungsten rod, output mirror, output mirror pipe orifice, cathode and cathode tungsten rod;The discharge tube is worn in the discharge tube attachment support;The discharge tube attachment support is worn in the water cooling pipe;The outer wall of the discharge tube attachment support contacts and fixes the water cooling pipe, inner wall contacts and fixes the discharge tube;The utility model replaces the discharge tube attachment support of the present utility model in background technology with nail and can ensure the straightness of discharge tube, thereby improve the beam quality of laser, output power and cutting performance.

Description

Technical Field

[0001] This utility model relates to the field of laser tube technology, and more specifically to a carbon dioxide laser tube. Background Technology

[0002] Currently, existing sealed carbon dioxide laser tubes (such as...) Figure 4 (As shown) It typically employs a three-layer tube-shell structure made of high borosilicate glass, consisting of a discharge tube, a cooling water tube, and a gas storage tube from the inside out. The discharge tube has a cathode and an anode installed at its two ends, respectively, and is connected to the gas storage tube via a return gas tube to maintain working gas circulation. To support the discharge tube with its large length-to-diameter ratio and suppress its bending due to gravity, existing technologies generally incorporate multiple sets of concentric conical protrusions (i.e.,...) on the outer wall of the cooling water tube. Figure 4 The spikes (2-5) in the middle are composed of three spikes evenly distributed in the circumferential direction. Their tips contact the outer wall of the discharge tube to provide radial support, thereby maintaining the straightness of the discharge tube and ensuring the laser output power and beam quality.

[0003] However, the existing spiked firing process has significant drawbacks: the firing process requires temperatures exceeding 800℃, which easily causes localized deformation of the discharge tube, and the height consistency of each set of spikes is difficult to control precisely; if the spikes are too high, they will compress the discharge tube, causing deformation; if they are too low, they cannot provide effective support, and inconsistent heights will cause the discharge tube to bend. Currently, straightness is mainly ensured by the operator's visual inspection and experience, resulting in a general distribution of straightness error of the discharge tube after firing between 0.1 and 0.3 mm / m (specifically, the number with straightness error ≤ 0.1 mm / m accounts for about 5%, the number with straightness error 0.1-0.15 mm / m accounts for about 30%, the number with straightness error 0.15-0.3 mm / m accounts for about 60%, and the number with straightness error greater than 0.3 mm / m accounts for about 5%). When the straightness error of the discharge tube reaches 0.2 mm / m, the beam quality M 2 With a factor increase of 0.1–0.3, the output power decreases by 1%–3%, and a noticeable degradation in beam quality and cutting ability has occurred.

[0004] Therefore, how to provide a carbon dioxide laser tube that can ensure the straightness of the discharge tube, thereby improving the laser beam quality, output power and cutting performance, is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the present invention provides a carbon dioxide laser tube.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A carbon dioxide laser tube includes a discharge tube, a discharge tube mounting bracket, a water cooling tube, a return gas tube, a gas storage tube, a total reflection mirror, a total reflection mirror port, an anode, an anode tungsten rod, an output mirror, an output mirror port, a cathode, and a cathode tungsten rod.

[0008] The discharge tube is inserted into the discharge tube attachment bracket;

[0009] The discharge tube attachment bracket is inserted inside the water-cooling pipe;

[0010] The outer wall of the discharge tube and the bracket contact and fix the water cooling tube, and the inner wall of the bracket contact and fix the discharge tube.

[0011] The water-cooling pipe is connected to the chiller through an inlet and an outlet;

[0012] The gas storage pipe contains working gas;

[0013] One end of the discharge tube is open inside the gas storage tube, and the other end is connected to the gas storage tube through the return gas tube;

[0014] One end of the discharge tube is provided with the cathode and the output mirror tube opening sequentially from the inside to the outside;

[0015] The output mirror is installed on the output mirror tube opening;

[0016] The cathode is connected to the negative terminal of the high-voltage electricity via the cathode tungsten rod;

[0017] The other end of the discharge tube is provided with the anode and the total reflection mirror opening sequentially from the inside to the outside;

[0018] The total reflection mirror is installed on the nozzle of the total reflection mirror tube;

[0019] The anode is connected to the positive terminal of the high-voltage electricity via the anode tungsten rod.

[0020] Preferably, the cross-section of the discharge tube attachment bracket is a ring-shaped folded structure;

[0021] The ring-shaped folded structure includes a first arc, a second arc, a third arc, a first vertex, a second vertex, a third vertex, a fourth vertex, a fifth vertex, and a sixth vertex;

[0022] The first arc, the second arc, and the third arc are evenly distributed along the circumferential direction;

[0023] The first vertex, the second vertex, and the third vertex are evenly distributed along the circumference.

[0024] The fourth vertex, the fifth vertex, and the sixth vertex are evenly distributed along the circumference.

[0025] The first vertex, the second vertex, and the third vertex contact and fix the outer wall of the discharge tube;

[0026] The fourth vertex, the fifth vertex, and the sixth vertex contact and fix the inner wall of the water-cooling pipe;

[0027] The distances from the fourth vertex, the fifth vertex, and the sixth vertex to the center line of the discharge tube are greater than the distances from the first arc, the second arc, and the third arc to the center line of the discharge tube.

[0028] Preferably, the cross-section of the discharge tube attachment bracket is a spoke-shaped reinforcing rib structure;

[0029] The spoke-type reinforcing rib structure includes a first ring and three spoke structures that radiate inward evenly on the first ring.

[0030] One end of each spoke structure is connected to the inner wall of the first ring, and the other end contacts and fixes the outer wall of the discharge tube.

[0031] The outer wall of the first ring contacts and fixes the inner wall of the water-cooling pipe.

[0032] Preferably, the cross-section of the discharge tube attachment bracket is an arc-shaped spoke-type reinforcing rib structure;

[0033] The arc-shaped spoke-type reinforcing rib structure includes a second ring and three arcs that radiate inward evenly on the second ring.

[0034] Both ends of each of the arcs are connected to the inner wall of the second ring;

[0035] The outer wall of each of the arcs contacts and fixes the outer wall of the discharge tube;

[0036] The outer wall of the second ring contacts and fixes the inner wall of the water-cooling pipe.

[0037] Preferably, the cross-section of the discharge tube attachment bracket is a circular ring structure, a square structure, a triangular structure, or a polygonal structure.

[0038] Preferably, the material of the discharge tube attachment bracket is aluminum alloy, stainless steel, oxygen-free copper, Kovar alloy, or alumina ceramic.

[0039] Preferably, the discharge tube attachment bracket is a pre-calibrated discharge tube attachment bracket with a straightness error ≤0.1 mm / m.

[0040] Preferably, the discharge tube is a pre-calibrated discharge tube with a straightness error ≤0.1 mm / m.

[0041] Preferably, the discharge tube, the discharge tube mounting bracket, and the water-cooling tube are sintered together.

[0042] As can be seen from the above technical solution, compared with the prior art, the present invention discloses a carbon dioxide laser tube. The present invention replaces the spikes in the prior art with the discharge tube attachment bracket of the present invention, which can ensure the straightness of the discharge tube, thereby improving the laser beam quality, output power and cutting performance. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0044] Figure 1 A schematic diagram of the carbon dioxide laser tube and the annular folded structure provided by this utility model;

[0045] Figure 2 A schematic diagram of the carbon dioxide laser tube and the spoke-type reinforcing rib structure provided by this utility model;

[0046] Figure 3 A schematic diagram of the carbon dioxide laser tube and the arc-shaped spoke-type reinforcing rib structure provided by this utility model;

[0047] Figure 4 This is a schematic diagram of a sealed carbon dioxide laser tube provided in the background art of this utility model. Detailed Implementation

[0048] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0049] This utility model discloses a carbon dioxide laser tube, including a discharge tube 1, a discharge tube mounting bracket 2, a water cooling tube 3, a return gas tube 4, a gas storage tube 5, a total reflection mirror 6-1, a total reflection mirror port 7-1, an anode 8-1, an anode tungsten rod 9-1, an output mirror 6-2, an output mirror port 7-2, a cathode 8-2, and a cathode tungsten rod 9-2.

[0050] The discharge tube 1 is inserted into the discharge tube attachment bracket 2;

[0051] The discharge tube attachment bracket 2 is inserted inside the water cooling pipe 3;

[0052] The outer wall of the discharge tube and the bracket 2 contacts and fixes the water-cooling tube 3, and the inner wall contacts and fixes the discharge tube 1.

[0053] The water-cooled pipe 3 is connected to the chiller through the inlet 3-1 and the outlet 3-2;

[0054] The gas storage pipe 5 contains working gas;

[0055] One end of the discharge tube 1 is open inside the gas storage tube 5, and the other end is connected to the gas storage tube 5 through the return gas tube 4;

[0056] One end of the discharge tube 1 is provided with the cathode 8-2 and the output mirror tube opening 7-2 from the inside to the outside;

[0057] The output mirror 6-2 is installed on the output mirror tube port 7-2;

[0058] The cathode 8-2 is connected to the negative terminal of the high-voltage electricity through the cathode tungsten rod 9-2;

[0059] The other end of the discharge tube 1 is provided with the anode 8-1 and the total reflection mirror port 7-1 from the inside to the outside;

[0060] The total reflection mirror 6-1 is installed on the total reflection mirror nozzle 7-1;

[0061] The anode 8-1 is connected to the positive electrode of the high voltage through the anode tungsten rod 9-1.

[0062] It is understandable that:

[0063] The method for manufacturing a carbon dioxide laser tube disclosed in this utility model is as follows: A straightened discharge tube 1 is inserted into a discharge tube mounting bracket 2 (the discharge tube mounting bracket 2 is pre-straightened, with a straightness error ≤0.1 mm / m; the inner diameter of the discharge tube mounting bracket 2 is equal to the outer diameter of the discharge tube 1, and the outer diameter of the discharge tube mounting bracket 2 is equal to the inner diameter of the water-cooling tube 3). The assembled discharge tube 1 and discharge tube mounting bracket 2 are then inserted together into the water-cooling tube 3 for assembly and firing. The following components are then fired: a return gas tube 4, a water inlet 3-1, a water outlet 3-2, a gas storage tube 5, an output mirror tube 7-2, a total reflection mirror tube 7-1, an anode tungsten rod 9-1, a cathode tungsten rod 9-2, an anode 8-1, and a cathode 8-2. A total reflection mirror 6-1 is installed at the total reflection mirror tube 7-1, and an output mirror 6-2 is installed at the output mirror tube 7-2. The tube is then filled with working gas (i.e., carbon dioxide).

[0064] When using the carbon dioxide laser tube of this invention, high voltage is applied to the anode and cathode through the anode tungsten rod and the cathode tungsten rod, and the working gas inside the discharge tube is excited. The excited carbon dioxide molecules release photons of a specific wavelength through energy level transitions. These photons are amplified in the resonant cavity composed of the discharge tube, the total reflection mirror and the output mirror, and form a laser that is output from one end of the output mirror.

[0065] When using the carbon dioxide laser tube of this invention, turn on the chiller so that cooling water enters the water-cooling tube from the inlet, cools the discharge tube and the discharge tube mounting bracket, and then flows out from the outlet.

[0066] In one embodiment, such as Figure 1 As shown, the cross-section of the discharge tube attachment bracket 2 is a ring-shaped folded structure;

[0067] The ring-shaped folded structure includes a first arc h1, a second arc h2, a third arc h3, a first vertex a, a second vertex b, a third vertex c, a fourth vertex d, a fifth vertex e, and a sixth vertex f;

[0068] The first circular arc h1, the second circular arc h2, and the third circular arc h3 are evenly distributed along the circumferential direction;

[0069] The first vertex a, the second vertex b, and the third vertex c are evenly distributed along the circumference.

[0070] The fourth vertex d, the fifth vertex e, and the sixth vertex f are evenly distributed along the circumference.

[0071] The first vertex a, the second vertex b, and the third vertex c contact and fix the outer wall of the discharge tube 1;

[0072] The fourth vertex d, the fifth vertex e, and the sixth vertex f contact and fix the inner wall of the water-cooling pipe 3;

[0073] The distances from the fourth vertex d, the fifth vertex e, and the sixth vertex f to the center line of the discharge tube 1 are greater than the distances from the first arc h1, the second arc h2, and the third arc h3 to the center line of the discharge tube 1.

[0074] It is understandable that the ring-shaped folded structure has the characteristics of lightweight structure and high load-bearing efficiency. By distributing the force through the folded structure, it has high structural strength and stability. Moreover, the outer and inner walls of this ring-shaped folded structure have considerable self-adaptability, and can still be tightly connected with the discharge tube and water cooling tube even when there are dimensional errors.

[0075] In one embodiment, such as Figure 2 As shown, the cross-section of the discharge tube attachment bracket 2 is a spoke-type reinforcing rib structure;

[0076] The spoke-type reinforcing rib structure includes a first ring 2-1 and three spoke structures 2-2 that radiate inward uniformly on the first ring 2-1;

[0077] One end of each spoke structure 2-2 is connected to the inner wall of the first ring 2-1, and the other end contacts and fixes the outer wall of the discharge tube 1;

[0078] The outer wall of the first ring 2-1 contacts and fixes the inner wall of the water-cooling pipe 3.

[0079] In one embodiment, such as Figure 3 As shown, the cross-section of the discharge tube attachment bracket 2 is an arc-shaped spoke-type reinforcing rib structure;

[0080] The arc-shaped spoke-type reinforcing rib structure includes a second ring 2-3 and three arcs 2-4 that radiate inward evenly on the second ring 2-3;

[0081] The two ends of each of the arcs 2-4 are connected to the inner wall of the second ring 2-3;

[0082] The outer wall of each of the arcs 2-4 contacts and fixes the outer wall of the discharge tube 1;

[0083] The outer wall of the second ring 2-3 contacts and fixes the inner wall of the water-cooling pipe 3.

[0084] In one embodiment, the cross-section of the discharge tube attachment bracket 2 is a circular ring structure, a square structure, a triangular structure, a polygonal structure, or other irregular shape structure.

[0085] In one embodiment, the length of the discharge tube attachment bracket 2 is less than the length of the discharge tube 1.

[0086] It is understandable that: since the discharge tube 1 has an inlet 3-1 and an outlet 3-2 at both ends, the discharge tube attachment bracket 2 can only be installed between the inlet 3-1 and the outlet 3-2, so the length of the discharge tube attachment bracket 2 is less than the length of the discharge tube 1.

[0087] In one embodiment, the discharge tube attachment bracket 2 is made of aluminum alloy, stainless steel, oxygen-free copper, Kovar alloy, or alumina ceramic.

[0088] It should be noted that the material of the discharge tube attachment bracket 2 is not limited to aluminum alloy, stainless steel, oxygen-free copper, Kovar alloy, and alumina ceramic. Any material (single material or composite material) that meets the following characteristics can be used as the material of the discharge tube attachment bracket 2: it is not easy to generate stress at a certain temperature, it can undergo plastic deformation, and its thermal conductivity is higher than that of high borosilicate glass.

[0089] It is understandable that: stress is not easily generated at a certain temperature, so when the discharge tube and the cooling water tube are fired together, the discharge tube and the auxiliary material will not deform excessively due to high temperature, affecting the straightness of the discharge tube; the material can undergo plastic deformation, so that if the straightness of the auxiliary material is not good, it can be straightened, thereby enhancing the rigidity of the discharge tube and maintaining its straightness; the thermal conductivity is higher than that of high borosilicate glass, so that the auxiliary material can enhance the cooling of the discharge tube while enhancing its rigidity.

[0090] In one embodiment, the discharge tube attachment bracket 2 is a pre-calibrated discharge tube attachment bracket with a straightness error ≤0.1 mm / m.

[0091] In one embodiment, the discharge tube 1 is a pre-calibrated discharge tube with a straightness error ≤0.1 mm / m.

[0092] In one embodiment, the discharge tube 1, the discharge tube mounting bracket 2, and the water cooling tube 3 are sintered together.

[0093] Compared to the method of nailing 2-5 used in the sealed carbon dioxide laser tube in the background technology, the discharge tube attachment bracket 2 of this utility model has a straightness error that is mostly between 0.1-0.15 mm / m. Among them, the number of tubes with a straightness error ≤0.1 mm / m accounts for about 30%, the number with a straightness error between 0.1-0.15 mm / m accounts for about 65%, and the number with a straightness error greater than 0.15 mm / m accounts for about 5%. After the straightness of the discharge tube is guaranteed, M 2 The factors are all less than 1.2, and the average power is increased by 5%; the discharge tube attachment bracket 2 of this utility model greatly improves the beam quality and output power of the laser.

[0094] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0095] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A carbon dioxide laser tube, characterized in that, It includes a discharge tube (1), a discharge tube mounting bracket (2), a water cooling tube (3), a return gas tube (4), a gas storage tube (5), a total reflection mirror (6-1), a total reflection mirror port (7-1), an anode (8-1), an anode tungsten rod (9-1), an output mirror (6-2), an output mirror port (7-2), a cathode (8-2), and a cathode tungsten rod (9-2); The discharge tube (1) is inserted into the discharge tube attachment bracket (2); The discharge tube attachment bracket (2) is inserted inside the water cooling pipe (3); The outer wall of the discharge tube attachment bracket (2) contacts and fixes the water cooling tube (3), and the inner wall contacts and fixes the discharge tube (1); The water-cooled pipe (3) is connected to the chiller through the inlet (3-1) and the outlet (3-2); The gas storage pipe (5) contains working gas; One end of the discharge tube (1) is open inside the gas storage tube (5), and the other end is connected to the gas storage tube (5) through the return gas tube (4); One end of the discharge tube (1) is provided with the cathode (8-2) and the output mirror tube opening (7-2) sequentially from the inside to the outside; The output mirror (6-2) is installed on the output mirror port (7-2); The cathode (8-2) is connected to the negative terminal of the high-voltage electricity through the cathode tungsten rod (9-2); The other end of the discharge tube (1) is provided with the anode (8-1) and the total reflection mirror opening (7-1) sequentially from the inside to the outside; The total reflection mirror (6-1) is installed on the port (7-1) of the total reflection mirror; The anode (8-1) is connected to the positive electrode of the high voltage through the anode tungsten rod (9-1).

2. A carbon dioxide laser tube according to claim 1, characterized in that, The cross-section of the discharge tube attachment bracket (2) is a ring-shaped folded structure; The ring-shaped folded structure includes a first arc (h1), a second arc (h2), a third arc (h3), a first vertex (a), a second vertex (b), a third vertex (c), a fourth vertex (d), a fifth vertex (e), and a sixth vertex (f); The first arc (h1), the second arc (h2), and the third arc (h3) are evenly distributed along the circumference. The first vertex (a), the second vertex (b), and the third vertex (c) are evenly distributed along the circumference. The fourth vertex (d), the fifth vertex (e), and the sixth vertex (f) are evenly distributed along the circumference. The first vertex (a), the second vertex (b), and the third vertex (c) contact and fix the outer wall of the discharge tube (1); The fourth vertex (d), the fifth vertex (e), and the sixth vertex (f) contact and fix the inner wall of the water-cooling pipe (3); The distances from the fourth vertex (d), the fifth vertex (e), and the sixth vertex (f) to the center line of the discharge tube (1) are greater than the distances from the first arc (h1), the second arc (h2), and the third arc (h3) to the center line of the discharge tube (1).

3. A carbon dioxide laser tube according to claim 1, characterized in that, The cross-section of the discharge tube attachment bracket (2) is a spoke-type reinforcing rib structure; The spoke-type reinforcing rib structure includes a first ring (2-1) and three spoke structures (2-2) that radiate inward evenly on the first ring (2-1); One end of each spoke structure (2-2) is connected to the inner wall of the first ring (2-1), and the other end contacts and fixes the outer wall of the discharge tube (1); The outer wall of the first ring (2-1) contacts and fixes the inner wall of the water-cooling pipe (3).

4. A carbon dioxide laser tube according to claim 1, characterized in that, The cross-section of the discharge tube attachment bracket (2) is an arc-shaped spoke-type reinforcing rib structure; The arc-shaped spoke-type reinforcing rib structure includes a second ring (2-3) and three arcs (2-4) that radiate inward evenly on the second ring (2-3); The two ends of each of the arcs (2-4) are connected to the inner wall of the second ring (2-3); The outer wall of each of the arcs (2-4) contacts and fixes the outer wall of the discharge tube (1); The outer wall of the second ring (2-3) contacts and fixes the inner wall of the water-cooling pipe (3).

5. A carbon dioxide laser tube according to claim 1, characterized in that, The cross-section of the discharge tube attachment bracket (2) is a circular ring structure, a square structure, a triangular structure, or a polygonal structure.

6. A carbon dioxide laser tube according to claim 1, characterized in that, The material of the discharge tube attachment bracket (2) is aluminum alloy, stainless steel, oxygen-free copper, Kovar alloy or alumina ceramic.

7. A carbon dioxide laser tube according to claim 1, characterized in that, The discharge tube attachment bracket (2) is a pre-calibrated discharge tube attachment bracket with a straightness error of ≤0.1 mm / m.

8. A carbon dioxide laser tube according to claim 1, characterized in that, The discharge tube (1) is a pre-calibrated discharge tube with a straightness error ≤0.1 mm / m.

9. A carbon dioxide laser tube according to claim 1, characterized in that, The discharge tube (1), the discharge tube mounting bracket (2), and the water cooling tube (3) are sintered together.

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