Pipeline surface polishing device

Abstract

The utility model belongs to the technical field of pipeline polishing, and particularly relates to a pipeline surface polishing device which comprises a machine tool body, the machine tool body comprises a workbench and a main shaft fixed to the workbench, a grinding wheel assembly is installed on the upper surface of the workbench in a sliding mode, two three-jaw chucks are arranged on the workbench, and one three-jaw chuck is fixedly connected to the main shaft. The other three-jaw chuck is rotationally installed on the upper surface of the workbench, steel bars are inserted into the two three-jaw chucks in the axial direction, the ends, close to each other, of the two steel bars extend out of the three-jaw chucks, chucks are fixed to the ends, located outside the three-jaw chucks, of the two steel bars, and step grooves are formed in the edges, away from the steel bars, of the chucks. And elastic gaskets are arranged on the two step grooves in a sleeving manner. The whole pipeline can be exposed in the grinding area of the grinding wheel, the surface of the pipeline is ground at a time, secondary grinding is not needed, and the flatness of a ground pipeline finished product is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipeline grinding, and specifically relates to a pipeline surface grinding device. Background Art

[0002] During the use of the pipeline, rust, sediment, dirt, oxides and other impurities may accumulate on the surface. Grinding can remove impurities on the surface of the pipeline, making the surface of the pipeline flatter and smoother. This helps to ensure the firmness and reliability of the welding, avoid defects such as cracks and holes in the welding, and thus improve the overall quality of the pipeline.

[0003] Pipe grinding can be divided into the following types according to different sites:

[0004] First, on-site grinding: After the pipe is transported to the installation site and cut off for welding, the staff holds an electric angle grinder and uses a rotating grinding wheel to continuously grind the area of ​​the pipe to be welded. The electric angle grinder has a small grinding area and takes a long time to complete the grinding work;

[0005] Second, pre-grinding: Pipes are stacked in the factory and clamped one by one into the table-type grinding device, and clamped from both ends using a clamp. The grinding device has a built-in grinding wheel or grinding belt, which continuously rotates to grind impurities on the outer wall of the pipe. When the flatness of the outer wall of the pipe reaches a certain requirement, it can be easily welded. In order to maintain the rigidity of the pipe, the grinding thickness is small.

[0006] When a grinding device is used to clamp a pipe, a movable clamp or a three-jaw chuck is often used, so that the two edges of the pipe are blocked, and the grinding wheel in the grinding device cannot contact the blocked area. A handheld electric angle grinder is required to grind the blocked edge of the pipe. The grinding wheels used for the two grindings are different, and the flatness of the pipe surface is prone to deviation after the two grindings. For this reason, we propose a pipe surface grinding device. Utility Model Content

[0007] The purpose of the utility model is to provide a pipeline surface grinding device, which can expose the entire pipeline to the grinding area of ​​the grinding wheel and grind the pipeline surface at one time to improve the flatness of the finished polished pipeline.

[0008] The technical solutions adopted in this utility are as follows:

[0009] A pipeline surface grinding device comprises a machine tool body, the machine tool body comprises a workbench and a spindle fixed on the workbench, a grinding wheel assembly is slidably mounted on the upper surface of the workbench, the workbench is provided with two three-jaw chucks, one of the three-jaw chucks is fixedly connected to the spindle, the other three-jaw chuck is rotatably mounted on the upper surface of the workbench, steel bars are axially inserted into the two three-jaw chucks, the ends of the two steel bars close to each other extend out of the three-jaw chucks, the ends of the two steel bars located outside the three-jaw chucks are fixed with chucks, the edges of the chucks away from the steel bars are provided with step grooves, and when the pipeline surface is ground, the grinding wheel assembly is slidably mounted on the upper surface of the workbench, and ... Move one of the three-jaw chucks forward and insert two steel rods respectively so that the distance between the two chucks is large enough, then put the pipe ports on the two step grooves respectively, and then push the three-jaw chuck in the opposite direction so that the vertical surface of the chuck in the step groove supports the pipe end face, and lock the three-jaw chuck on the workbench to stop sliding. In this way, start the spindle to rotate the two three-jaw chucks, two steel rods, two chucks and pipes. At the same time, the driving part drives the grinding wheel to rotate, and the grinding wheel is brought close to the pipe to move in a straight line along the pipe surface at a specified cutting depth, so that the entire pipe can be exposed to the grinding area of ​​the grinding wheel, and the pipe surface can be polished at one time without secondary polishing, so as to improve the flatness of the polished pipe product.

[0010] Elastic gaskets are sleeved on the two step grooves. The outer diameters of the two elastic gaskets are smaller than the outer diameter of the chuck. The elastic gaskets can be made of rubber material. The pipeline and the elastic gasket have an interference fit. After the step groove is tightly sleeved, the pipeline and the elastic gasket are locked by friction.

[0011] A sealing ring is fixed on the side of the two chucks away from each other, and the two sealing rings are both sleeved on the outside of the steel rod. After clamping the pipe, the two chucks respectively abut against the two three-jaw chucks, and the sealing rings are used for buffering and shock absorption to avoid hard collision between the two chucks and the two three-jaw chucks.

[0012] A cutting fluid pipe is fixed on the upper surface of the grinding wheel assembly. During the grinding process, the cutting fluid is sucked by the cutting fluid pump and pumped along the cutting fluid pipe to be sprayed to the grinding position of the grinding wheel, which can wash away the debris and take away the heat on the surface of the pipe for cooling.

[0013] Two heat dissipation pipes are inserted inside a chuck away from the main shaft. Both heat dissipation pipes penetrate adjacent steel rods and chucks. One of the heat dissipation pipes extends along the axial direction of the steel rod and the chuck, and is connected to the ventilation system through a rotating joint. Ventilation is conducted toward the inside of the pipeline along one heat dissipation pipe, and exhaust is conducted from the other heat dissipation pipe. Circulating air circulates in the pipeline to take away heat, thereby further enhancing the cooling effect.

[0014] One of the heat dissipation pipes is located between the two three-claw chucks and is connected and fixed with an extension pipe. A plurality of air outlets are provided at intervals on the extension pipe. When the heat dissipation pipe is ventilated, cold air is guided along the extension pipe and distributed to different positions in the pipe through the air outlets, thereby increasing the heat dissipation area.

[0015] The technical effects achieved by this utility model are:

[0016] The utility model discloses a pipeline surface grinding device. When grinding the pipeline surface, one of the three-jaw chucks is moved in the forward direction along the workbench, and two steel rods are respectively inserted to make the distance between the two chucks large enough, and then the pipeline ports are respectively sleeved on the two step grooves, and then the three-jaw chuck is pushed in the reverse direction to make the vertical surface of the chuck located in the step groove support the pipeline end surface, and the three-jaw chuck on the workbench is locked to stop sliding, so that the main shaft is started to rotate the two three-jaw chucks, the two steel rods, the two chucks and the pipeline, and at the same time, the driving part drives the grinding wheel to rotate, and the grinding wheel is brought close to the pipeline, and moves in a straight line along the pipeline surface at a specified cutting depth, so that the whole pipeline can be exposed to the grinding area of ​​the grinding wheel, and the pipeline surface is ground once and for all without secondary grinding, so as to improve the flatness of the finished polished pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a front view of a pipeline surface grinding device of the present invention;

[0018] Figure 2 It is a front view of the extension tube of the utility model;

[0019] Figure 3 It is a front view of the chuck of the utility model;

[0020] Figure 4 It is a side view of the practical chuck.

[0021] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0022] 1. Machine tool body; 2. Grinding wheel assembly; 3. Three-jaw chuck; 4. Steel rod; 5. Chuck; 6. Step groove; 7. Elastic gasket; 8. Sealing ring; 9. Cutting fluid pipe; 10. Heat dissipation pipe; 11. Extension pipe. DETAILED DESCRIPTION

[0023] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is specifically described below in conjunction with the embodiments. It should be understood that the following text is only used to describe one or several specific implementations of the present invention, and does not strictly limit the scope of protection specifically requested by the present invention.

[0024] like Figure 1-4As shown, a pipeline surface grinding device includes a machine tool body 1. The machine tool body 1 can select an MA-2560 CNC external cylindrical grinder equipped with a Mitsubishi system. The machine tool body 1 includes a workbench and a spindle fixed on the workbench. A grinding wheel assembly 2 is slidably installed on the upper surface of the workbench. The grinding wheel assembly 2 includes a driving member and a grinding wheel. Two three-jaw chucks 3 are provided on the workbench. One of the three-jaw chucks 3 is fixedly connected to the spindle, and the other three-jaw chuck 3 is rotatably installed on the upper surface of the workbench through a bearing seat. The bearing seat is slidably connected to the workbench. Steel rods 4 are axially inserted into the two three-jaw chucks 3. The ends of the two steel rods 4 close to each other extend out of the three-jaw chuck 3. Chucks 5 are fixed to the ends of the two steel rods 4 located outside the three-jaw chuck 3. Step grooves 6 are provided on the edges of the chucks 5 away from the steel rods 4. The step grooves 6 and the chucks 5 are coaxial with the steel rods 4. The machine tool body 1 is a ring-shaped structure. Before starting the machine, the machine tool body 1 is first inspected to check the parameters such as hydraulic oil, cooling water, and air pressure of the gas circuit. When grinding the pipeline surface, one of the three-jaw chucks 3 is moved forward along the workbench, and two steel rods 4 are inserted respectively to make the distance between the two chucks 5 large enough, and then the pipeline ports are respectively put on the two step grooves 6, and then the three-jaw chuck 3 is pushed in the opposite direction to make the vertical surface of the chuck 5 located in the step groove 6 support the pipeline end face, and the three-jaw chuck 3 on the workbench is locked to stop sliding, so that the spindle is started to rotate the two three-jaw chucks 3, the two steel rods 4, the two chucks 5 and the pipeline, and the driving part drives the grinding wheel to rotate, and the grinding wheel is brought close to the pipeline, and moves in a straight line along the pipeline surface at a specified cutting depth, so that the entire pipeline can be exposed to the grinding area of ​​the grinding wheel, and the pipeline surface is ground once and for all without secondary grinding, so as to improve the flatness of the finished polished pipeline.

[0025] For pipes with different diameters, the chuck 5 and the step groove 6 in the present technical solution can be milled out on the spot through the blank by a machining center, and can be processed within 0.5 to 1 hour. The processed chuck 5 and the step groove 6 can be marked with dimensions using a paint pen for future reuse. Regarding the requirements for the step groove 6, the depth dimension of the step groove 6 must be smaller than the thickness dimension of the corresponding pipe to avoid the risk of collision caused by the chuck 5 contacting the grinding wheel during grinding.

[0026] like Figure 1 , Figure 3 and Figure 4 As shown, elastic gaskets 7 are sleeved on the two step grooves 6. The outer diameters of the two elastic gaskets 7 are smaller than the outer diameter of the chuck 5. The elastic gaskets 7 can be made of rubber material. The pipeline and the elastic gasket 7 have an interference fit. After the step groove 6 is tightly sleeved, the pipeline and the elastic gasket 7 are locked by friction.

[0027] like Figure 1 , Figure 3 and Figure 4As shown, a sealing ring 8 is fixed on the side of the two chucks 5 that are away from each other. The sealing ring 8 can be made of fluororubber. The two sealing rings 8 are both sleeved on the outside of the steel rod 4. After clamping the pipe, the two chucks 5 are respectively against the two three-jaw chucks 3, and the sealing ring 8 is used for buffering and shock absorption to avoid hard collision between the two chucks 5 and the two three-jaw chucks 3.

[0028] like Figure 1 and Figure 2 As shown, a cutting fluid pipe 9 is fixed on the upper surface of the grinding wheel assembly 2, and the cutting fluid pipe 9 is connected to a cutting fluid pump. During the grinding process, the cutting fluid is sucked by the cutting fluid pump, pumped along the cutting fluid pipe 9 and sprayed to the grinding position of the grinding wheel, which can wash away the debris and take away the heat on the surface of the pipe for cooling.

[0029] like Figure 1 and Figure 2 As shown, two heat dissipation pipes 10 are inserted into a chuck 5 away from the main shaft. The two heat dissipation pipes 10 both penetrate the adjacent steel rods 4 and the chucks 5. One of the heat dissipation pipes 10 extends along the axial direction of the steel rods 4 and the chucks 5, and is connected to the ventilation system through a rotary joint. Ventilation is conducted toward the inside of the pipeline along one heat dissipation pipe 10, and exhaust is conducted from the other heat dissipation pipe 10. Circulating air circulates in the pipeline to take away heat, thereby further enhancing the cooling effect.

[0030] like Figure 1 and Figure 2 As shown, one of the heat dissipation pipes 10 is located between the two three-jaw chucks 3 and is connected and fixed with an extension pipe 11, on which a plurality of air outlets are provided at intervals. When the heat dissipation pipe 10 is ventilated, cold air is guided along the extension pipe 11 and distributed to different positions in the pipeline through the air outlets, thereby increasing the heat dissipation area.

[0031] The working principle of the utility model is as follows: when grinding the surface of the pipeline, one of the three-jaw chucks 3 is moved in the positive direction along the workbench, and two steel rods 4 are respectively inserted to make the distance between the two chucks 5 large enough, and then the pipeline ports are respectively put on the two step grooves 6, and then the three-jaw chuck 3 is pushed in the reverse direction to make the vertical surface of the chuck 5 located in the step groove 6 support the pipeline end face, and the three-jaw chuck 3 on the workbench is locked to stop sliding, so that the main shaft is started to rotate the two three-jaw chucks 3, the two steel rods 4, the two chucks 5 and the pipeline, and at the same time, the driving part drives the grinding wheel to rotate, and the grinding wheel is brought close to the pipeline, and moves in a straight line along the pipeline surface at a specified cutting depth, so that the entire pipeline can be exposed to the grinding area of ​​the grinding wheel, and the pipeline surface is ground once and for all without secondary grinding, so as to improve the flatness of the finished polished pipeline.

[0032] The above is only a preferred embodiment of the present invention. It should be noted that, for ordinary technicians in the field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A pipeline surface grinding device, comprising a machine tool body (1), characterized in that: The machine tool body (1) comprises a workbench and a spindle fixed on the workbench, a grinding wheel assembly (2) is slidably mounted on the upper surface of the workbench, and two three-jaw chucks (3) are arranged on the workbench, one of the three-jaw chucks (3) is fixedly connected to the spindle, and the other three-jaw chuck (3) is rotatably mounted on the upper surface of the workbench, a steel rod (4) is axially inserted into the two three-jaw chucks (3), the ends of the two steel rods (4) close to each other extend out of the three-jaw chuck (3), and a chuck (5) is fixed to the ends of the two steel rods (4) located outside the three-jaw chuck (3), and the edges of the chucks (5) away from the steel rods (4) are provided with step grooves (6).

2. A pipeline surface grinding device according to claim 1, characterized in that: The two step grooves (6) are both sleeved with elastic gaskets (7), and the outer diameters of the two elastic gaskets (7) are both smaller than the outer diameter of the chuck (5).

3. A pipeline surface grinding device according to claim 1, characterized in that: A sealing ring (8) is fixed to the two chucks (5) on the sides away from each other, and the two sealing rings (8) are sleeved on the outside of the steel rod (4).

4. A pipeline surface grinding device according to claim 1, characterized in that: A cutting fluid pipe (9) is fixed on the upper surface of the grinding wheel assembly (2).

5. The pipeline surface grinding device according to claim 1, characterized in that: Two heat dissipation pipes (10) are inserted into a chuck (5) away from the main shaft, and the two heat dissipation pipes (10) both penetrate adjacent steel bars (4) and the chuck (5).

6. A pipeline surface grinding device according to claim 5, characterized in that: One of the heat dissipation pipes (10) is located between the two three-jaw chucks (3) and is connected and fixed with an extension pipe (11).

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