Carbon dioxide laser tube

Abstract

The utility model relates to a carbon dioxide laser tube, which comprises a gas storage tube, a water cooling tube and a discharge tube which are sequentially sleeved from outside to inside, and further comprises a rolling support mechanism, the rolling support mechanism is provided with at least one layer of sleeve structure from outside to inside, and the rolling support mechanism is sleeved outside the water cooling tube. The gas storage pipe and the water cooling pipe are supported; and one layer of the rolling supporting mechanism is a ball sleeve. The water-cooling pipe can be supported through the rolling supporting mechanism, the coaxiality between the water-cooling pipe and the gas storage pipe is improved, meanwhile, through rolling of the balls of the ball sleeve, the expansion amount difference value between the gas storage pipe and the water-cooling pipe can be adapted, friction force generated between the water-cooling pipe and the gas storage pipe is reduced as much as possible, and the service life of the water-cooling pipe and the gas storage pipe is prolonged. Therefore, possible pulling of the gas storage tube to the water cooling tube is reduced, and the stability of output light beams and output power of the laser tube is improved.

Description

Technical Field

[0001] The utility model relates to the field of laser tubes, in particular to a carbon dioxide laser tube. Background Art

[0002] The current carbon dioxide laser tube usually includes a discharge tube, a water cooling tube sleeved on the outside of the discharge tube, a gas storage tube sleeved on the outside of the water cooling tube, a cathode electrode and an anode electrode respectively arranged at both ends of the discharge tube, and an output window and a reflection window arranged at both ends of the gas storage tube, the reflection window includes a reflection lens and a reflection lens cooling device, the output window includes an output lens and an output lens cooling device, and the discharge tube is filled with carbon dioxide gas and other auxiliary gases; when a high voltage is applied to the electrodes, a glow discharge is generated in the discharge tube, which is reflected by the reflection lens and the output lens, so that photons repeatedly oscillate in the discharge tube to form a laser beam, which is emitted from the output lens to obtain the final laser beam.

[0003] In order to improve the stability of the laser beam output power, it is necessary to improve the coaxiality of the discharge tube, the water cooling tube and the gas storage tube as much as possible, and the end of the water cooling tube corresponding to the positive electrode of the discharge tube is relatively fixed to the gas storage tube, so it is necessary to support or fix the end of the water cooling tube corresponding to the negative electrode of the discharge tube. At present, most of them use glass columns to connect the water cooling tube and the gas storage tube, thereby supporting and fixing the negative electrode of the water cooling tube.

[0004] However, in the process of implementing the present invention, the inventors found that this support method has at least the following problems:

[0005] Due to the difference in heat dissipation between the gas storage tube and the water cooling tube when the laser tube is working, the gas storage tube and the water cooling tube may expand and contract differently due to thermal expansion during operation. At this time, a large force may be generated at the connection of the glass column, causing the water cooling tube to be deformed due to tension, affecting the coaxiality between the tubes, resulting in unstable output beam of the laser tube and reduced output power. Utility Model Content

[0006] The purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art and provide a carbon dioxide laser tube.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] In the first aspect, the utility model provides a carbon dioxide laser tube, comprising a gas storage tube, a water cooling tube and a discharge tube which are sequentially sleeved from the outside to the inside, and also comprising a rolling support mechanism, wherein the rolling support mechanism is a sleeve structure having at least one layer from the outside to the inside, the rolling support mechanism is sleeved outside the water cooling tube, and supports the gas storage tube and the water cooling tube; one layer of the rolling support mechanism is a ball sleeve.

[0009] As a preferred solution of the utility model, one layer of the rolling support mechanism is an internal sleeve, and the ball sleeve, the internal sleeve and the water-cooling tube are sequentially sleeved and abutted from the outside to the inside.

[0010] As a preferred embodiment of the utility model, three layers of the rolling support mechanism are respectively an outer sleeve, a support sleeve and a middle sleeve, the outer sleeve is connected to the air storage pipe, and the outer sleeve, the support sleeve, the middle sleeve and the ball sleeve are sequentially sleeved and abutted from the outside to the inside.

[0011] As a preferred embodiment of the present invention, the support cylinder includes a cylinder body and at least three legs, all of which are connected to the cylinder body; the cylinder body is sleeved and abuts against the middle sleeve, and the free ends of all of the legs abut against the outer sleeve outwardly.

[0012] As a preferred solution of the utility model, the number of the support tubes is at least 2, and the plurality of support tubes are distributed at intervals along the axial direction of the middle sleeve.

[0013] As a preferred solution of the present invention, the outer sleeve is a glass tube, and the outer sleeve is integrally connected to the gas storage tube via a glass column.

[0014] As a preferred solution of the present invention, there are multiple glass columns, and the multiple glass columns are arranged on the same circumferential surface of the outer sleeve.

[0015] As a preferred solution of the utility model, the inner sleeve and the middle sleeve are both metal tubes.

[0016] As a preferred solution of the utility model, the rolling support mechanism is supported on one end of the water-cooling tube corresponding to the cathode electrode.

[0017] In a second aspect, the utility model provides a method for processing a carbon dioxide laser tube, which is used to process a carbon dioxide laser tube as described in any of the above schemes, wherein the carbon dioxide laser tube includes an outer sleeve, and the outer sleeve is connected to the gas storage tube, comprising the steps of:

[0018] First, the rolling support mechanism is sleeved on the water cooling pipe, and then the outer sleeve is cast and connected to the gas storage pipe.

[0019] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0020] 1. The utility model provides a carbon dioxide laser tube, which can support the gas storage tube and the water cooling tube through the setting of the rolling support mechanism, so as to improve the coaxiality between the water cooling tube and the gas storage tube. At the same time, the rolling of the ball sleeve ball can adapt to the difference in the expansion and contraction amount between the gas storage tube and the water cooling tube, reduce or even avoid the possible pulling of the gas storage tube on the water cooling tube, and further reduce or even eliminate the possible deformation of the water cooling tube, so that the coaxiality between each tube body is always kept in a relatively stable state, thereby improving the stability of the output beam and output power of the laser tube.

[0021] The ball sleeve can reduce the friction between the water cooling tube and the gas storage tube as much as possible through the rolling of the balls, thereby further reducing the possible pulling of the gas storage tube on the water cooling tube, thereby improving the stability of the output beam and output power of the laser tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of Example 1 of the utility model.

[0023] Figure 2 for Figure 1 Schematic diagram of the middle AA direction.

[0024] Figure 3 This is a partial structural diagram of Example 1 of the utility model.

[0025] Markings in the figure: 1-gas storage tube, 2-water cooling tube, 3-discharge tube, 31-positive electrode, 32-negative electrode, 4-inner sleeve, 5-ball sleeve, 51-ball, 6-middle sleeve, 7-support tube, 71-leg, 8-outer sleeve, 81-glass column, 9-spiral tube. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below in combination with test examples and specific implementation methods. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0027] In the description of the specific embodiments of the present invention, unless otherwise specified, the terms indicating the orientation or position relationship such as "upper", "lower", "left", "right", "center", "inside", "outside", etc. are all expressions based on the orientation or position relationship shown in the drawings, or the orientation or position relationship of the product / equipment / device of the utility model when it is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the utility model or simplifying the description in the specific embodiments, so that technicians can quickly understand the scheme, rather than indicating or implying that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present invention.

[0028] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the solution of the utility model.

[0029] In addition, the expressions “first”, “second”, “third”, etc. that appear in the terms are merely descriptions used to distinguish the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0030] In addition, in the description of the embodiments of the present invention, "several", "multiple" and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0031] In addition, in the description of the technical solution of the utility model, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal communication of two components.

[0032] Wherein, in the description of the embodiments of the present utility model, "axial direction" refers to the axial direction of the discharge tube of the carbon dioxide laser tube, unless otherwise specified.

[0033] Example 1

[0034] like Figures 1 to 3 As shown, embodiment 1 provides a carbon dioxide laser tube, including a gas storage tube 1, a water cooling tube 2 and a discharge tube 3 which are sequentially sleeved from the outside to the inside, wherein the discharge tube 3 is filled with carbon dioxide gas and other auxiliary gases, and an anode electrode 31 and a cathode electrode 32 are respectively arranged at both ends of the discharge tube 3. When a high voltage is applied to the electrodes, a glow discharge is generated in the discharge tube 3, which is reflected by the lens, so that photons repeatedly oscillate in the discharge tube 3 to form a laser beam and emit.

[0035] On this basis, it is necessary to support the gas storage pipe 1 and the water-cooling pipe 2 to ensure the coaxiality of the gas storage pipe 1 and the water-cooling pipe 2. The present embodiment adopts a non-fixed connection support structure with a rolling structure. Specifically, a rolling support mechanism is arranged between the gas storage pipe 1 and the water-cooling pipe 2. The rolling support mechanism is sleeved outside the water-cooling pipe 2, and the gas storage pipe 1 and the water-cooling pipe 2 are supported by the rolling support mechanism, so that the radial gap between the gas storage pipe 1 and the water-cooling pipe 2 remains stable, thereby improving the coaxiality of the water-cooling pipe 2 and the gas storage pipe 1.

[0036] The rolling support mechanism is a sleeve structure having at least one layer from outside to inside, and one layer of the rolling support mechanism is a ball sleeve 5. That is, the rolling support mechanism can be a sleeve structure composed of a plurality of sleeves sequentially sleeved from outside to inside, in which case the sleeve structure has multiple layers from outside to inside, such as two layers, three layers, four layers, etc., in which one layer is a ball sleeve 5; or a sleeve structure formed by only one sleeve, in which case the sleeve structure has only one layer from outside to inside, and the layer is the ball sleeve 5.

[0037] The ball sleeve 5 participates in supporting the gas storage tube 1 and the water cooling tube 2. Meanwhile, when the gas storage tube 1 and / or the water cooling tube 2 generate axial displacement at the position corresponding to the ball sleeve 5, at this time, while the ball sleeve 5 supports the gas storage tube 1 and the water cooling tube 2, the balls 51 of the ball sleeve 5 roll along the axial direction, thereby reducing or even avoiding the possible pulling of the gas storage tube 1 on the water cooling tube 2, thereby reducing or even eliminating the possible deformation of the water cooling tube 2, so that the coaxiality between the various tube bodies is always kept in a relatively stable state, thereby improving the stability of the output beam and output power of the laser tube.

[0038] The rolling of the balls 51 in the ball sleeve 5 can minimize the friction between the water cooling tube 2 and the gas storage tube 1, thereby further reducing the possible pulling of the gas storage tube 1 on the water cooling tube 2, thereby improving the stability of the laser tube output beam and output power.

[0039] The position where the rolling support mechanism supports the water-cooling tube 2 can be any axial position on the water-cooling tube 2 except the end corresponding to the anode electrode 31 of the discharge tube 3, for example, the middle position of the water-cooling tube 2, the end of the water-cooling tube 2 corresponding to the cathode electrode 32 of the discharge tube 3, in which case the rolling support mechanism can support the water-cooling tube 2. It is preferred that the rolling support mechanism is sleeved on the end of the water-cooling tube 2 corresponding to the cathode electrode 32 of the discharge tube 3, thereby improving the supporting effect of the water-cooling tube 2 corresponding to the cathode electrode 32 of the discharge tube 3, reducing the deviation of the water-cooling tube 2 and the discharge tube 3 caused by the shaking of the laser tube, and reducing the output power reduction and output spot instability of the laser tube when it moves.

[0040] Among them, when the carbon dioxide laser tube is provided with a spiral tube 9 at the cathode electrode 32, the rolling support mechanism can be located on the side of the spiral tube 9 close to the anode electrode 31, and the distance from the spiral tube 9 is 5cm-10cm. At this distance, the rolling support mechanism can still be regarded as supporting one end of the water-cooling tube 2 corresponding to the cathode electrode 32 of the discharge tube 3.

[0041] Among them, the ball sleeve 5 can be directly sleeved and abutted against the outside of the water cooling tube 2, but considering that the balls 51 of the ball sleeve 5 apply a large pressure to the water cooling tube 2, which may cause damage to the water cooling tube 2, it is preferred to set a protective sleeve between the ball sleeve 5 and the water cooling tube 2.

[0042] Based on this, in one or more embodiments, one of the sleeves of the rolling support mechanism except the ball sleeve 5 is an inner sleeve 4, and the ball sleeve 5, the inner sleeve 4 and the water-cooling tube 2 are sequentially sleeved and abutted from the outside to the inside. The length of the inner sleeve 4 along the axial direction is slightly greater than the length of the ball sleeve 5. At this time, the inner sleeve 4 is arranged between the ball sleeve 5 and the water-cooling tube 2, which can prevent the ball sleeve 5 from directly contacting the water-cooling tube 2 and causing damage to the water-cooling tube 2. At this time, the inner side of the ball 51 of the ball sleeve 5 can contact the outer wall of the inner sleeve 4 and roll.

[0043] In addition, the ball sleeve 5 can directly abut against the inner wall of the gas storage tube 1, but considering that the radial distance between the gas storage tube 1 and the ball sleeve 5 is relatively large, the thickness of the ball sleeve 5 is difficult to meet the requirements, or the ball sleeve 5 of corresponding thickness is too heavy, which puts pressure on each tube body. Therefore, it is preferred to set a sleeve body for support between the ball sleeve 5 and the gas storage tube 1.

[0044] Based on this, in one or more embodiments, three layers of the rolling support mechanism are respectively an outer sleeve 8, a support tube 7 and a middle sleeve 6, the outer sleeve 8 is connected to the air storage pipe 1, and the outer sleeve 8, the support tube 7, the middle sleeve 6 and the ball sleeve 5 are sequentially sleeved and abutted from the outside to the inside.

[0045] The support tube 7 may be any component that can be disposed between the outer sleeve 8 and the middle sleeve 6 and supports the gap between the outer sleeve 8 and the middle sleeve 6 .

[0046] In one or more embodiments, Figure 2 to Figure 3 As shown, the support tube 7 includes a tube body and at least three legs 71, all of which are connected to the tube body; the tube body is sleeved and abuts against the outer surface of the middle sleeve 6, and the free ends of all the legs 71 abut against the inner surface of the outer sleeve 8. It has a simple structure, low cost, and is more suitable for the operation mechanism of the carbon dioxide laser tube.

[0047] Specifically, the three legs 71 of the support tube 7 can be one elastic leg and two fixed legs, and the blade length of the elastic leg is greater than that of the fixed legs. The support tube 7 under this structure can well offset the bending phenomenon of the water-cooling tube 2 under the influence of gravity, improve the coaxiality of the discharge tube 3, the water-cooling tube 2, and the gas storage tube 1, and reduce the possibility of unstable laser tube beam and power reduction. In addition, when the laser tube is subjected to external impact, the support tube 7 can provide vertical support force to reduce the impact on the water-cooling tube 2.

[0048] In addition, compared with the four-corner support bracket, the design of the three legs 71 utilizes the stability principle of the triangle to improve the stability of the support tube 7. It also saves more space and is easier to cut during production, so that each leg 71 can be longer, meeting the requirement of a larger radial distance between the water cooling pipe 2 and the gas storage pipe 1, and better offsetting the external impact force.

[0049] Since the blade length of the elastic leg is longer than that of the fixed leg, when only one leg 71 is an elastic leg, the length of the elastic leg can be relatively longer, thereby meeting the requirement of a larger radial distance between the water cooling pipe 2 and the gas storage pipe 1, and better offsetting the external impact force.

[0050] In addition, the support tube 7 can also be an integrated carbon dioxide laser tube discharge tube support tube as mentioned in CN202333427U, or a support tube for a carbon dioxide laser tube as mentioned in CN206148791U.

[0051] The outer sleeve 8 and the support sleeve 7 are used to fill the larger radial distance between the gas storage tube 1 and the ball sleeve 5, thereby providing support force. The support sleeve 7 is short in axial length, and it is difficult to be directly sleeved on the outside of the ball sleeve 5 and cooperate with the balls 51 of the ball sleeve 5. Therefore, by arranging the middle sleeve 6 between the support sleeve 7 and the ball sleeve 5, the middle sleeve 6 is sleeved outside the ball sleeve 5, so that the outer side of the balls 51 of the ball sleeve 5 can contact and roll with the inner wall of the middle sleeve 6.

[0052] Among them, it is more preferred that the inner sleeve 4 and the middle sleeve 6 are both metal tubes, thereby ensuring that the inner sleeve 4 and the middle sleeve 6 have sufficient strength to resist the extrusion of the steel column.

[0053] The number of the support tubes 7 may be one, preferably at least two. Figure 1 As shown, a plurality of support tubes 7 are spaced apart along the axial direction of the middle sleeve 6, thereby providing sufficient support force. Based on this preferred solution, two support tubes 7 are preferably respectively sleeved near the two ends of the middle sleeve 6, thereby providing more stable support.

[0054] In one or more embodiments, the outer sleeve 8 can be a glass tube, and a glass column 81 is provided between the outer sleeve 8 and the gas storage tube 1. The two ends of the glass column 81 are respectively connected to the outer sleeve 8 and the gas storage tube 1 through integral casting, thereby realizing the connection between the outer sleeve 8 and the gas storage tube 1.

[0055] The number of the glass columns 81 is preferably multiple, and the multiple glass columns 81 are arranged on the same circumferential surface of the outer sleeve 8. That is, at least two glass columns 81 are arranged on a cross section (circumferential surface) of the outer sleeve 8. All the glass columns 81 are evenly spaced along the same circumferential surface of the outer sleeve 8, so as to improve the stability and reliability of the support, and to maximize the coaxiality of the outer sleeve 8 when the gas storage pipe 1 expands due to heat and elongates. At the same time, at this time, the multiple glass columns 81 are in the same axial position. Therefore, if there is a difference in the amount of expansion and contraction between the outer sleeve 8 and the gas storage pipe 1, the gas storage pipe 1 will not pull the part of the outer sleeve 8 where the glass columns 81 are provided, thereby further improving the stability of the outer sleeve 8, and then ensuring the support effect of the outer sleeve 8 relative to the water-cooling pipe 2.

[0056] Example 2

[0057] A processing method is provided for processing a carbon dioxide laser tube as described in any one of the embodiments 1, wherein the carbon dioxide laser tube comprises an outer sleeve 8, wherein the outer sleeve 8 is connected to the gas storage tube 1, and comprises the steps of:

[0058] First, the rolling support mechanism is sleeved on the water-cooling pipe 2 , and then the outer sleeve 8 is cast and connected to the gas storage pipe 1 .

[0059] Among them, there may be processing errors in each layer of the rolling support mechanism. At the same time, when each layer of the rolling support mechanism is sleeved on the water-cooling tube 2, position deviation may occur. For example, the body of the support tube 7 has a slit. When the support tube 7 is sleeved outside the middle sleeve 6, the support tube 7 may open outward from the slit. At this time, the cross-section of the support tube 7 will change from a circular shape to a shape that is approximately circular. Therefore, by first sleeve the rolling support mechanism on the water-cooling tube 2, and then cast the outer sleeve 8 to connect it to the gas storage tube 1, the position of the outer sleeve 8 cast on the gas storage tube 1 can be adjusted to adapt to the above-mentioned processing errors or position deviations, ensuring that the rolling support mechanism can provide a stable support effect, improve processing accuracy, and enhance the coaxiality of the gas storage tube 1 and the water-cooling tube 2.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A carbon dioxide laser tube, comprising a gas storage tube (1), a water cooling tube (2) and a discharge tube (3) which are sequentially arranged from the outside to the inside, characterized in that: It also comprises a rolling support mechanism, which is a sleeve structure having at least one layer from the outside to the inside, and is sleeved outside the water cooling pipe (2) to support the gas storage pipe (1) and the water cooling pipe (2); One layer of the rolling support mechanism is a ball sleeve (5).

2. A carbon dioxide laser tube according to claim 1, characterized in that: One layer of the rolling support mechanism is an internal sleeve (4), and the ball sleeve (5), the internal sleeve (4) and the water cooling pipe (2) are sequentially sleeved and abutted from the outside to the inside.

3. A carbon dioxide laser tube according to claim 2, characterized in that: The three layers of the rolling support mechanism are an outer sleeve (8), a support sleeve (7) and a middle sleeve (6). The outer sleeve (8) is connected to the air storage pipe (1). The outer sleeve (8), the support sleeve (7), the middle sleeve (6) and the ball sleeve (5) are sequentially sleeved and abutted from the outside to the inside.

4. A carbon dioxide laser tube according to claim 3, characterized in that: The support cylinder (7) comprises a cylinder body and at least three legs (71), all of which are connected to the cylinder body; the cylinder body is sleeved on and abuts against the middle sleeve (6), and the free ends of all of the legs (71) abut against the outer sleeve (8) outwardly.

5. The carbon dioxide laser tube according to claim 3, characterized in that: The number of the support tubes (7) is at least 2, and the plurality of support tubes (7) are distributed at intervals along the axial direction of the middle sleeve (6).

6. The carbon dioxide laser tube according to claim 3, characterized in that: The outer sleeve (8) is a glass tube, and the outer sleeve (8) and the gas storage tube (1) are integrally connected via a glass column (81).

7. A carbon dioxide laser tube according to claim 6, characterized in that: There are multiple glass columns (81), and the multiple glass columns (81) are arranged on the same circumferential surface of the outer sleeve (8).

8. The carbon dioxide laser tube according to claim 3, characterized in that: The inner sleeve (4) and the middle sleeve (6) are both metal tubes.

9. A carbon dioxide laser tube according to any one of claims 1 to 8, characterized in that: The rolling support mechanism is supported on one end of the water cooling tube (2) corresponding to the cathode electrode (32).

Images