End polishing machine

Abstract

The present application provides an end polishing machine, which relates to the field of metal pipe processing technology. Among them, the end polishing machine includes: a bracket, an internal polishing mechanism and an external polishing mechanism; the bracket is used to support the pipe material and drive the pipe material to roll, the internal polishing mechanism is located at one end of the bracket, and the working part of the internal polishing mechanism can extend into the end of the pipe material on the bracket, which is used to polish the inner wall of the end of the pipe material, and the external polishing mechanism is located above the bracket and is used to polish the outer wall of the end of the pipe material. The end polishing machine provided by the embodiment of the present invention has a bracket that can form a polishing station, support the pipe material and drive the pipe material to roll, and has an internal polishing mechanism and an external polishing mechanism, so that the inner and outer walls of the end of the pipe material can be polished at the same time under the drive of the bracket, which can replace manual automatic polishing work, effectively reduce the use of labor, and improve production efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of metal pipe processing, and in particular to an end polishing machine. Background Art

[0002] The sand screen is a necessary device for building oil and gas wells. The setting of the sand screen can effectively prevent sand, soil and other debris from entering the oil pipe, ensuring the normal progress of oil and gas production.

[0003] The main filtering component in the sand screen is the filter sleeve, which is a sleeve formed by bending a metal mesh plate and welding it. Before assembling and connecting the filter sleeve with other parts of the sand screen, it is necessary to polish and grind the inner and outer walls of both ends of the filter sleeve within a certain length range to remove the welding slag splash attachment during the welding process.

[0004] However, the current polishing and grinding work of the inner and outer walls of the two ends of the sand control screen is carried out manually, that is, workers hold a straight-handled grinder to grind and polish along the end welds of the inner and outer walls. This process is labor-intensive for workers, the polishing quality is uneven, and it needs to be repeated several times, which is time-consuming and labor-intensive. Summary of the invention

[0005] The main purpose of the present invention is to provide an end polishing machine, which can solve the current technical problem that the end of a pipe cannot be automatically polished.

[0006] In order to solve the above technical problems, the embodiments of the present application provide the following technical solutions:

[0007] The present application provides an end polishing machine, comprising:

[0008] a bracket, an inner polishing mechanism and an outer polishing mechanism;

[0009] The bracket is used to support the pipe material and drive the pipe material to roll. The internal polishing mechanism is located at one end of the bracket. The working part of the internal polishing mechanism can extend into the end of the pipe material on the bracket to polish the inner wall of the end of the pipe material. The external polishing mechanism is located above the bracket to polish the outer wall of the end of the pipe material.

[0010] The purpose of the present invention and the solution to its technical problems can be further achieved by adopting the following technical measures.

[0011] Optionally, in the aforementioned end polishing machine, the bracket comprises a first bracket and a second bracket arranged at intervals;

[0012] The first bracket includes a first support, two rollers and a first driving device, wherein the two rollers are arranged side by side on the top of the first support for supporting the pipe material, and the first driving device is installed on the first support and connected to the two rollers for driving the two rollers to rotate simultaneously and drive the pipe material to roll;

[0013] The second bracket has the same structure as the first bracket, and two rollers of the second bracket and two rollers of the first bracket form a polishing station for supporting the pipe material.

[0014] Optionally, in the aforementioned end polishing machine, the support roller includes a roller shaft and a roller wheel, the roller shaft is rotatably mounted on the top of the first bracket via a bearing bracket, the first end of the roller shaft is connected to the second driving device, and the roller wheel is arranged at the second end of the roller shaft.

[0015] Optionally, in the aforementioned end polishing machine, the roller includes a wheel body and a retaining ring, the retaining ring is arranged at one end of the wheel body, the other end of the wheel body is connected to the roller shaft, the side surface of the wheel body is used to support the pipe material, and the retaining ring is used to stop the end of the pipe material to limit the position of the pipe material.

[0016] Optionally, the aforementioned end polishing machine further comprises:

[0017] a second bracket, on which the inner polishing mechanism and the outer polishing mechanism are disposed, and the second bracket is disposed on one side of the first bracket;

[0018] Among them, the second bracket has a cantilever located above the roller, the external polishing mechanism is arranged on the cantilever and located above the roller, the external polishing mechanism can reciprocate in the vertical direction close to or away from the roller, the internal polishing mechanism is located at one end of the roller and parallel to the roller, the height of the internal polishing mechanism is higher than the roller and located between the two rollers, and can reciprocate along the first direction from the first bracket to the second bracket, and is used to extend into or out of the end of the pipe material located on the roller and polish the inner wall of the end of the pipe material.

[0019] Optionally, in the aforementioned end polishing machine, the external polishing mechanism comprises a second driving device and a first grinding wheel machine, the second driving device is arranged on the cantilever in a vertical direction, and the driving end of the second driving device is arranged vertically downward, and the driving end of the second driving device is connected to the first grinding wheel machine;

[0020] The internal polishing mechanism includes a first slide rail, a third driving device and a second grinding wheel machine. The first slide rail is arranged on the second bracket along the first direction, the third driving device is arranged on the second bracket, the second grinding wheel machine is slidably connected to the first slide rail, and the driving end of the third driving device is connected to the second grinding wheel machine for driving the second grinding wheel machine to reciprocate along the first slide rail.

[0021] Optionally, in the aforementioned end polishing machine, the number of the second brackets is two, which are respectively and correspondingly arranged on one side of the first bracket and one side of the second bracket.

[0022] Optionally, in the aforementioned end polishing machine, two of the second brackets are respectively connected to two of the first brackets.

[0023] Optionally, the aforementioned end polishing machine further comprises:

[0024] The first bracket on one side of the second slide rail is fixedly connected to one end of the second slide rail, and the first bracket on the other side is slidably connected to the other end of the second slide rail.

[0025] Optionally, in the aforementioned end polishing machine, a positioning portion is provided on the second slide rail, and the positioning portion is provided on the first bracket for fixing the first bracket at a certain position of the second slide rail.

[0026] By means of the above technical solution, the end polishing machine of the present invention has at least the following advantages:

[0027] The end polishing machine provided in the embodiment of the present invention has a bracket that can form a polishing station, support the pipe material and drive the pipe material to roll, and has an internal polishing mechanism and an external polishing mechanism. In this way, the inner and outer walls of the end of the pipe material can be polished simultaneously under the drive of the bracket, which can replace manual automatic polishing work, effectively reduce the use of labor, and improve production efficiency.

[0028] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present application will become easy to understand. In the accompanying drawings, several embodiments of the present application are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0030] Figure 1 A schematic diagram of the structure of an end polishing machine is shown schematically;

[0031] Figure 2 The structural diagram of another end polishing machine is schematically shown;

[0032] Figure 3 The schematic diagram of the structure of a roller of an end polishing machine is shown schematically.

[0033] Figure 1-Figure 3 The symbols are:

[0034] 1-bracket, 11-first bracket, 111-first bracket, 112-roller, 1121-roller shaft, 1122-roller wheel, 1123-bearing bracket, 1124-wheel body, 1125-retaining ring, 113-first driving device, 12-second bracket, 2-inner polishing mechanism, 21-first slide rail, 22-third driving device, 23-second grinding wheel machine, 3-outer polishing mechanism, 31-second driving device, 32-first grinding wheel machine, 4-pipe material, 5-second bracket, 51-cantilever, 6-second slide rail. DETAILED DESCRIPTION

[0035] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0036] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which this application belongs.

[0037] like Figure 1 As shown, an embodiment of the present invention proposes an end polishing machine, which includes: a bracket 1, an internal polishing mechanism 2 and an external polishing mechanism 3; the bracket 1 is used to support the pipe material 4 and drive the pipe material 4 to roll, the internal polishing mechanism 2 is located at one end of the bracket 1, and the working part of the internal polishing mechanism 2 can extend into the end of the pipe material 4 on the bracket 1, and is used for polishing the inner wall of the end of the pipe material 4, and the external polishing mechanism 3 is located above the bracket 1 and is used for polishing the outer wall of the end of the pipe material 4.

[0038] Specifically, since the end polishing machine provided in the embodiment of the present invention is used to polish the end of the pipe material 4, the bracket 1 needs to be in a form that is convenient for supporting the pipe material 4, for example, a V-shaped or arc-shaped supporting portion can be formed, or the supporting portion can be formed by two rollers 1121 arranged side by side, but it should be noted that when the bracket 1 supports the pipe material 4, the pipe material 4 is preferably kept in a horizontal state. In addition, in order to enable the pipe material 4 to be automatically polished, the bracket 1 needs to be able to drive the pipe material 4 to roll, and the rolling needs to be in the original position. The pipe material 4 can be driven to roll by the rotation of the roller 1121 supporting the pipe material 4, or a driving wheel can be separately provided to make the driving wheel contact with the pipe material 4, and the pipe material 4 can be driven to rotate by the rotation of the driving wheel, and then the internal polishing mechanism 2 and the external polishing mechanism 3 are cooperated to realize automatic polishing.

[0039] The internal polishing mechanism 2 needs to polish the inner wall of the end of the tube 4. The internal polishing mechanism can be set at one end of the bracket 1, and the working part of the internal polishing mechanism 2 can be extended into the end of the tube 4 of the bracket 1 for internal polishing. For example, the internal polishing mechanism 2 can be a driving device with a polishing wheel. The polishing wheel enters or moves out of the end of the tube 4 under the drive of the driving device, and then cooperates with the bracket 1 to drive the tube 4 to roll to complete the polishing of the inner wall of the end of the tube 4.

[0040] The outer polishing mechanism 3 needs to polish the outer wall of the end of the pipe material 4. The outer polishing mechanism 3 can be set above the bracket 1. For example, the polishing wheel can be driven by a driving device, and the polishing wheel is moved in the vertical direction under the drive of the driving device, and the polishing wheel is brought into contact with the outer wall of the end of the pipe material 4, and then the outer wall of the end of the pipe material 4 is polished in cooperation with the bracket 1 driving the pipe material 4 to roll.

[0041] Furthermore, the end polishing machine provided in the embodiment of the present invention can also be provided with a controller, and the controller controls the bracket 1 to drive the tube material 4 to rotate, and the controller controls the operation of the inner polishing mechanism 2 and the outer polishing mechanism 3. The specific control method is mastered by the technicians, and the present invention will not repeat it. In addition, the end polishing machine provided in the embodiment of the present invention can also be produced in conjunction with automatic loading and unloading equipment to achieve further automation and improve production efficiency.

[0042] The end polishing machine provided in the embodiment of the present invention has a bracket 1 that can form a polishing station, support the pipe material 4 and drive the pipe material 4 to roll, and has an internal polishing mechanism 2 and an external polishing mechanism 3. In this way, the inner and outer walls of the end of the pipe material 4 can be polished simultaneously under the drive of the bracket 1, which can replace manual automatic polishing work, effectively reduce the use of labor, and improve production efficiency.

[0043] In a specific implementation, the bracket 1 includes a first bracket 11 and a second bracket 12 arranged at intervals;

[0044] The first bracket 11 includes a first bracket 111, two rollers 112 and a first driving device 113. The two rollers 112 are arranged side by side on the top of the first bracket 111 to support the pipe material 4. The first driving device 113 is installed on the first bracket 111 and connected to the two rollers 112 to drive the two rollers 112 to rotate simultaneously and drive the pipe material 4 to roll; wherein, the second bracket 12 has the same structure as the first bracket 11, and the two rollers 112 of the second bracket 12 and the two rollers 112 of the first bracket 11 form a polishing station for supporting the pipe material 4.

[0045] Specifically, the above-mentioned interval arrangement of two first brackets 11 of the same structure as the bracket 1 is a preferred solution, but the embodiment of the present invention is not limited to the use of two first brackets 11, that is, the bracket 1 can be formed by multiple first brackets 11 of the same structure, as long as it can stably support the pipe material 4. Since the first bracket 11 and the second bracket 12 have the same structure, the following embodiment of the present invention is described with the structure of the first bracket 11. The structure of the first bracket 111 can be a block-shaped support structure or a frame-type support structure, which is not specifically limited in the embodiment of the present invention. The diameters of the rollers 112 arranged side by side on the top of the first bracket 111 can be set according to actual needs. The two side-by-side rollers 112 form a recessed accommodating space therebetween, which can be used to support the pipe material 4. The second bracket 12 and the first bracket 11 are arranged at intervals in the same manner, that is, the four rollers 112 are parallel to each other, and the center lines of the two opposite rollers 112 on the first bracket 11 and the second bracket 12 are collinear. In this way, the recessed accommodating space formed between the two rollers 112 on the first bracket 11 and the recessed accommodating space formed by the two rollers 112 on the second bracket 12 can together form a polishing station for supporting the pipe material 4, and the pipe material 4 can be horizontally supported on the polishing station. Among them, the distance between the first bracket 11 and the second bracket 12 can be adapted to the length of the pipe 4, so that when the pipe 4 is placed on the first bracket 11 and the second bracket 12, the two ends of the pipe 4 are respectively located on the two rollers 112 of the first bracket 11 and the two rollers 112 of the second bracket 12.

[0046] Furthermore, the two rollers 112 can be driven to rotate by the first driving device 113 at the same time, so that the two rollers 112 can drive the pipe material 4 to roll in place. The first driving device 113 can be a driving motor, and the first driving device 113 can be connected to two belts at the same time, respectively connected to the two rollers 112, and then drive the two rollers 112 to rotate in the same direction and at the same speed at the same time. The specific belt connection method is known to technicians and will not be described in detail in the embodiment of the present invention.

[0047] In a specific implementation, the roller 112 includes a roller shaft 1121 and a roller wheel 1122. The roller shaft 1121 is rotatably mounted on the top of the first bracket 111 through a bearing bracket 1123. The first end of the roller shaft 1121 is connected to the second driving device 31, and the roller wheel 1122 is set at the second end of the roller shaft 1121.

[0048] Specifically, each roller 112 can be rotatably connected to two bearing brackets 1123 arranged at intervals on the top of the first bracket 111, thereby ensuring that the roller 112 can be stably located on a plane and rotated. Among them, the roller shaft 1121 can be sequentially inserted into the two bearing brackets 1123 and rotatably connected to the two bearing brackets 1123.

[0049] Furthermore, if Figure 3 As shown, the roller 1122 includes a wheel body 1124 and a retaining ring 1125, wherein the retaining ring 1125 is arranged at one end of the wheel body 1124, and the other end of the wheel body 1124 is connected to the roller shaft 1121, the side surface of the wheel body 1124 is used to support the pipe material 4, and the retaining ring 1125 is used to stop the end of the pipe material 4 to limit the position of the pipe material 4.

[0050] Specifically, the retaining ring 1125 of the roller 1122 on the first bracket 11 and the retaining ring 1125 of the roller 1122 on the second bracket 12 are respectively located at the two ends of the bracket 1, that is, the retaining ring 1125 is located at the two ends of the polishing station formed by the roller 1122 on the first bracket 11 and the roller 1122 on the second bracket 12, so that the pipe material 4 is placed in the polishing station, and the retaining ring 1125 can limit the two ends of the pipe material 4.

[0051] In a specific implementation, the end polishing machine provided by the embodiment of the present invention further includes:

[0052] A second bracket 5, on which the inner polishing mechanism 2 and the outer polishing mechanism 3 are arranged, and the second bracket 5 is arranged on one side of the first bracket 111; wherein, the second bracket 5 has a cantilever 51 located above the roller 112, the outer polishing mechanism 3 is arranged on the cantilever 51 and located above the roller 112, the outer polishing mechanism 3 can reciprocate in the vertical direction close to or away from the roller 112, the inner polishing mechanism 2 is located at one end of the roller 112 and is parallel to the roller 112, the inner polishing mechanism 2 is higher than the roller 112 and is located between the two rollers 112, and can reciprocate along the first direction from the first bracket 11 to the second bracket 12, and is used to extend into or extend out of the end of the pipe material 4 located on the roller 112, and polish the inner wall of the end of the pipe material 4.

[0053] Specifically, the second bracket 5 may be connected to the first bracket 111 or not, but it should be noted that the second bracket 5 needs to be arranged on one side of the first bracket 111 so that the internal polishing mechanism 2 and the external polishing mechanism 3 arranged on the second bracket 5 can correspond to the roller 112 on the first bracket 111, and then can be opposite to the end of the pipe material 4 on the roller 112, and polish the inner and outer walls of the end of the pipe material 4.

[0054] Further, the cantilever 51 of the second bracket 5 and the second bracket 5 can be an integrated structure, for example, the second bracket 5 is an inverted L-shaped bracket. The external polishing mechanism 3 can include a second drive device 31 and a first grinder 32, wherein the second drive device 31 is arranged on the cantilever 51 in the vertical direction, and the driving end of the second drive device 31 is arranged vertically downward, and the second drive device 31 can be a cylinder, a hydraulic cylinder or an electric cylinder, and the driving end of the second drive device 31 is connected to the first grinder 32. In this way, the second drive device 31 can drive the first grinder 32 to reciprocate in the vertical direction, that is, the first grinder 32 can approach or move away from the roller 112, and then the first grinder 32 can polish the outer wall of the end of the pipe material 4 located at the roller 112.

[0055] Meanwhile, the inner polishing mechanism 2 comprises a first slide rail 21, a third driving device 22 and a second grinder 23. The first slide rail 21 is arranged on the second bracket 5 along the first direction. The third driving device 22 is arranged on the second bracket 5. The second grinder 23 is slidably connected to the first slide rail 21. The driving end of the third driving device 22 is connected to the second grinder 23 to drive the second grinder 23 to reciprocate along the first slide rail 21. The third driving device 22 can be the same as the second driving device 31, and can be a cylinder, a hydraulic cylinder or an electric cylinder. The third driving device 22 can drive the second grinder 23 to move along the length direction of the pipe material 4, so that the second grinder 23 extends into the end of the pipe material 4 and polishes the inner wall of the end of the pipe material 4. It should be noted that the height of the first slide rail 21 on the second bracket 5 needs to ensure that the second grinder 23 can extend into the end of the pipe material 4 after movement.

[0056] In a specific implementation, the number of the second bracket 5 can be one, and the inner polishing mechanism 2 and the outer polishing mechanism 3 are arranged on the second bracket 5, so that the inner and outer walls of one end of the pipe material 4 can be automatically polished each time. The number of the second bracket 5 can also be two, which are respectively arranged on one side of the first bracket 11 and one side of the second bracket 12, so that each second bracket 5 is provided with the inner polishing mechanism 2 and the outer polishing mechanism 3, and the inner walls of both ends of the pipe material 4 can be polished simultaneously, thereby improving production efficiency.

[0057] like Figure 2 As shown, further, since the lengths of the pipes 4 that need end polishing are different, in order to adapt to the polishing of pipes 4 of various lengths, two of the second brackets 5 can be connected to the two first brackets 111 respectively, and then a second slide rail 6 is added, and the second slide rail 6 can be set on the ground or a support platform, and then the first bracket 111 on one side is fixedly connected to one end of the second slide rail 6, and the first bracket 111 on the other side is slidably connected to the other end of the second slide rail 6. In this way, according to the length of the pipe 4, the distance between the two first brackets 111 can be adjusted by sliding the first bracket 111 on the other side on the second slide rail 6, that is, the distance between the first bracket 11 and the second bracket 12 can be adjusted.

[0058] In a specific implementation, after the first bracket is slidably connected with the second slide rail, a positioning portion (not shown in the figure) is required to be provided to fix the first bracket at a certain position of the second slide rail. The positioning portion may be a pressure bolt. For example, a bolt hole is provided on the first bracket, and the positioning of the first bracket is achieved by screwing the pressure bolt and supporting the slide rail. Alternatively, the positioning portion may be a clip. The specific structure may refer to the clip for fixing the mold on the press.

[0059] In addition, the end polishing machine provided by the embodiment of the present invention can also be equipped with a dust hood, which is set at both ends of the bracket to cover the ends of the pipe material, thereby sucking away the dust and flying chips generated during polishing by the inner polishing mechanism and the outer polishing mechanism to protect the environment.

[0060] It is understandable that the related features in the above devices can be referenced to each other. In addition, the "first", "second" and the like in the above embodiments are used to distinguish the various embodiments, and do not represent the advantages and disadvantages of the various embodiments.

[0061] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known structures and technologies are not shown in detail so as not to obscure the understanding of this description.

[0062] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An end polishing machine, characterized in that: include: a bracket, an inner polishing mechanism and an outer polishing mechanism; The bracket is used to support the pipe material and drive the pipe material to roll, the inner polishing mechanism is located at one end of the bracket, and the working part of the inner polishing mechanism can extend into the end of the pipe material on the bracket to polish the inner wall of the end of the pipe material, and the outer polishing mechanism is located above the bracket to polish the outer wall of the end of the pipe material; The bracket includes a first bracket and a second bracket arranged at an interval; The first bracket includes a first support, two rollers and a first driving device, wherein the two rollers are arranged side by side on the top of the first support for supporting the pipe material, and the first driving device is installed on the first support and connected to the two rollers for driving the two rollers to rotate simultaneously and drive the pipe material to roll; Wherein, the second bracket has the same structure as the first bracket, and two rollers of the second bracket and two rollers of the first bracket form a polishing station for supporting the pipe material; The roller comprises a roller shaft and a roller wheel, wherein the roller shaft is rotatably mounted on the top of the first bracket through a bearing bracket, the first end of the roller shaft is connected to the second driving device, and the roller wheel is arranged on the second end of the roller shaft; The roller comprises a wheel body and a retaining ring, wherein the retaining ring is arranged at one end of the wheel body, and the other end of the wheel body is connected to the roller shaft, the side surface of the wheel body is used to support the pipe material, and the retaining ring is used to retain the end of the pipe material to limit the position of the pipe material; a second bracket, on which the inner polishing mechanism and the outer polishing mechanism are disposed, and the second bracket is disposed on one side of the first bracket; Wherein, the second bracket has a cantilever located above the roller, the outer polishing mechanism is arranged on the cantilever and located above the roller, the outer polishing mechanism can reciprocate in the vertical direction close to or away from the roller, the inner polishing mechanism is located at one end of the roller and parallel to the roller, the inner polishing mechanism is higher than the roller and located between the two rollers, and can reciprocate along the first direction from the first bracket to the second bracket, and is used to extend into or extend out of the end of the pipe material located on the roller, and polish the inner wall of the end of the pipe material; The number of the second brackets is two, which are respectively and correspondingly arranged on one side of the first bracket and one side of the second bracket; The two second brackets are respectively connected to the two first brackets; The first bracket on one side of the second slide rail is fixedly connected to one end of the second slide rail, and the first bracket on the other side is slidably connected to the other end of the second slide rail.

2. The end polishing machine according to claim 1, characterized in that: The external polishing mechanism includes a second driving device and a first grinding wheel machine, the second driving device is arranged on the cantilever in a vertical direction, and the driving end of the second driving device is arranged vertically downward, and the driving end of the second driving device is connected to the first grinding wheel machine; The internal polishing mechanism includes a first slide rail, a third driving device and a second grinding wheel machine. The first slide rail is arranged on the second bracket along the first direction, the third driving device is arranged on the second bracket, the second grinding wheel machine is slidably connected to the first slide rail, and the driving end of the third driving device is connected to the second grinding wheel machine for driving the second grinding wheel machine to reciprocate along the first slide rail.

3. The end polishing machine according to claim 1, characterized in that: The second slide rail is provided with a positioning portion, and the positioning portion is provided on the first bracket and is used to fix the first bracket at a certain position of the second slide rail.

Images