Steel pipe internal grinding machine

Abstract

The utility model discloses a steel pipe internal grinding machine, which relates to the technical field of steel pipe production and processing, and comprises a base, the middle part of the base is rotatably connected with two groups of first threaded shafts, the surfaces of the first threaded shafts are in threaded connection with limiting slide blocks, and the upper ends of the limiting slide blocks are fixedly connected with supporting columns; the upper end of the supporting column is fixedly connected with a first fixing base. A third motor drives a third threaded shaft to rotate, a movable column moves along the third threaded shaft to slide towards the interior of the base, the movable column pushes a fixed column to move, the fixed column drives a polishing roller to move through a second fixed seat and a rotating shaft, the rotating shaft and the polishing roller are inserted into the middle of a steel pipe, and the polishing roller is driven to rotate until the rotating shaft is inserted into the fixed cylinder. And the third motor stops rotating, then the fourth motor drives the rotating shaft to rotate, the rotating shaft drives the grinding roller to rotate, the interior of the steel pipe is ground, then the grinding steps are repeated, the steel pipe can be ground more finely, and therefore the grinding efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of steel pipe production and processing, in particular to a steel pipe internal grinding machine. Background Art

[0002] Seamless steel pipe is made by punching a whole round steel bar. There is no weld seam on the surface of the steel pipe, which is called seamless steel pipe. According to the production method, seamless steel pipe can be divided into hot-rolled seamless steel pipe, cold-rolled seamless steel pipe, cold-drawn seamless steel pipe, extruded seamless steel pipe, jacking pipe, etc. During the processing of seamless steel pipe, due to various factors, its inner wall will have many defects such as scratches, burrs or impurities, which affect the use effect of the steel pipe. Therefore, the inner wall of the steel pipe needs to be polished.

[0003] Published patent: A steel pipe internal grinding machine (publication number: CN211760292U), comprising a workbench, a movable trolley on one side of the workbench, a grinding mechanism on the movable trolley, and a drive mechanism mounted on the bottom of the movable trolley for reciprocating movement toward the workbench. The workbench is provided with a mounting slot, in which a lower clamping plate is slidably mounted. A lifting mechanism is provided below the lower clamping plate, and an upper clamping plate is slidably mounted above the lower clamping plate. The upper clamping plate can cooperate with the lower clamping plate to clamp the steel pipe in place under the action of a telescopic spring. When grinding steel pipes of different diameters, the lifting mechanism can drive the lower clamping plate up or down, thereby ensuring that the steel pipe is always coaxial with the grinding rod, thereby ensuring the grinding quality.

[0004] The above patent has the following defects: when grinding a steel pipe, only one steel pipe can be ground at a time, and there is only one grinding specification. Grinding with different precisions requires replacing the grinding head, which is very troublesome and the grinding efficiency is low. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a steel pipe internal grinding machine.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a steel pipe internal grinding mill, comprising a base, two groups of first threaded shafts are rotatably connected to the middle part of the base, the surfaces of the first threaded shafts are threadedly connected to the limiting sliders, and the limiting sliders are slidably connected to the inside of the base, the upper end of the limiting slider is fixedly connected to the support column, the upper end of the support column is fixedly connected to the first fixed seat, the upper and lower sides of the first fixed seat are hinged by hinges, one end of the first threaded shaft is fixedly connected to a synchronous wheel, and the two groups of synchronous wheels are connected by a synchronous belt, one side of the base is fixedly connected to a first mounting seat, the middle part of the first mounting seat is fixedly connected to a first motor, and the output end of the first motor is fixedly connected to one end of a group of first threaded shafts passing through the base.

[0007] As a further description of the above technical solution:

[0008] Three groups of second mounting seats are fixedly connected to the side surface of one end of the base, a second motor is fixedly connected to the middle of the second mounting seat, the output ends of the second motors are fixedly connected to second threaded shafts, and the second threaded shafts are rotatably connected to the inside of the base, a moving rod is threadedly connected to the surface of the second threaded shaft, and the moving rod is slidably connected to the inside of the base, and the upper end of the moving rod is fixedly connected to a fixed cylinder.

[0009] As a further description of the above technical solution:

[0010] Three groups of third motors are arranged inside the base at one end close to the second motor, and the output ends of the third motors are fixedly connected to third threaded shafts. The end of the third threaded shaft away from the third motor is rotatably connected to the first support base, and the first support base is fixedly connected inside the base.

[0011] As a further description of the above technical solution:

[0012] The surface of the third threaded shaft is threadedly connected with a moving column, and the moving column is slidably connected to the inside of the base, and the lower end of the first support seat passes through the lower end of the moving column.

[0013] As a further description of the above technical solution:

[0014] The end of the movable column away from the third motor is fixedly connected to the fixed column, the upper end of the fixed column is fixedly connected to the second fixed seat, the middle of the second fixed seat is fixedly connected to the fourth motor, and the output end of the fourth motor is fixedly connected to the rotating shaft.

[0015] As a further description of the above technical solution:

[0016] A fourth motor is provided on the surface of the rotating shaft. One end of the rotating shaft close to the fourth motor is fixedly connected to a limiting ring, and the limiting ring is located at one end of the grinding roller.

[0017] As a further description of the above technical solution:

[0018] One side of the upper surface of the fixing column is fixedly connected with a second supporting seat, and the middle part of the upper end of the second supporting seat is rotatably connected with a rotating shaft.

[0019] The utility model has the following beneficial effects:

[0020] In the present invention, first, the grinding accuracy of the three groups of grinding rollers is different, and the grinding accuracy of the three groups of grinding rollers is gradually precise. The steel pipe is clamped in the middle of the two groups of first fixed seats. The first motor drives the first threaded shaft to rotate, so that the limit slider moves with the first fixed seat through the support column, thereby sending the steel pipe to the coaxial position of the first group of grinding rollers. The second motor drives the second threaded shaft to rotate, so that the moving rod pushes the fixed cylinder to move to the specified position. At the same time, the third motor drives the third threaded shaft to rotate, and the moving column moves along the third threaded shaft to slide toward the inside of the base, so that the moving column pushes the fixed column to move The fixed column moves the grinding roller through the second fixed seat and the rotating shaft, so that the rotating shaft and the grinding roller are inserted into the middle of the steel pipe. Until the rotating shaft is inserted into the fixed cylinder, the third motor stops rotating, and then the fourth motor drives the rotating shaft to rotate, and the rotating shaft drives the grinding roller to rotate to grind the inside of the steel pipe. After grinding, the second motor and the third motor rotate in opposite directions to make the rotating shaft leave the inside of the steel pipe. Then the first motor drives the first threaded shaft to rotate, so that the support column pushes the steel pipe to other groups of grinding rollers, and then repeats the above grinding steps to perform more detailed grinding of the steel pipe, thereby improving the grinding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional diagram of the utility model;

[0022] Figure 2 This is a cross-sectional three-dimensional structural diagram of the base of the utility model from the first perspective;

[0023] Figure 3 This is a cross-sectional three-dimensional structural diagram of the base of the utility model from a second viewing angle.

[0024] Legend:

[0025] 1. Base; 2. First mounting seat; 3. Second mounting seat; 4. First motor; 5. First threaded shaft; 6. Synchronous wheel; 7. Limiting slider; 8. Support column; 9. First fixed seat; 10. Second motor; 11. Second threaded shaft; 12. Moving rod; 13. Fixed cylinder; 14. Third motor; 15. Third threaded shaft; 16. First supporting seat; 17. Moving column; 18. Fixed column; 19. Second fixed seat; 20. Fourth motor; 21. Rotating shaft; 22. Grinding roller; 23. Second supporting seat. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limiting the present invention. The terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In addition, unless otherwise expressly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, they can be fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections, indirect connections through an intermediate medium, or internal connections between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Reference Figure 1-3 The utility model provides an embodiment: a steel pipe internal grinding machine, including a base 1, two groups of first threaded shafts 5 are rotatably connected to the middle part of the base 1, the surfaces of the first threaded shafts 5 are threadedly connected to the limiting sliders 7, and the limiting sliders 7 are slidably connected to the inside of the base 1, the upper ends of the limiting sliders 7 are fixedly connected to the support columns 8, the upper ends of the support columns 8 are fixedly connected to the first fixed seats 9, the upper and lower sides of the first fixed seats 9 are hinged by hinges, one end of the first threaded shafts 5 are fixedly connected to the synchronous wheels 6, and the two groups of synchronous wheels 6 are connected by synchronous belts, one side of the base 1 is fixedly connected to the first mounting base 2, the middle part of the first mounting base 2 is fixedly connected to the first motor 4, and the output end of the first motor 4 is fixedly connected to one end of a group of first threaded shafts 5 passing through the base 1.

[0029] Three groups of third motors 14 are provided at one end of the base 1 near the second motor 10. The output ends of the third motors 14 are fixedly connected to the third threaded shafts 15. The end of the third threaded shaft 15 away from the third motor 14 is rotatably connected to the first support seat 16, and the first support seat 16 is fixedly connected to the inside of the base 1. The surface of the third threaded shaft 15 is threadedly connected to a moving column 17, and the moving column 17 is slidably connected to the inside of the base 1, and the lower end of the first support seat 16 passes through the lower end of the moving column 17. The end of the moving column 17 away from the third motor 14 is fixedly connected to a fixed column 18, and the upper end of the fixed column 18 is fixedly connected to a second fixed seat 19. The middle part of the second fixed seat 19 is fixedly connected to a fourth motor 20, and the output end of the fourth motor 20 is fixedly connected to a rotating shaft 21. A fourth motor 20 is provided on the surface of the rotating shaft 21. One end of the rotating shaft 21 close to the fourth motor 20 is fixedly connected to a limiting ring, and the limiting ring is located at one end of the grinding roller 22. A second support seat 23 is fixedly connected to one side of the upper surface of the fixed column 18. The middle part of the upper end of the second support seat 23 is rotatably connected to the rotating shaft 21. Three groups of second mounting seats 3 are fixedly connected to the side surface of one end of the base 1. The middle part of the second mounting seat 3 is fixedly connected to the second motor 10. The output ends of the second motor 10 are all fixedly connected to the second threaded shaft 11, and the second threaded shaft 11 is all rotatably connected to the inside of the base 1. The surface of the second threaded shaft 11 is threadedly connected to the moving rod 12, and the moving rod 12 is slidably connected to the inside of the base 1. The upper end of the moving rod 12 is fixedly connected to the fixed cylinder 13.

[0030] Working principle: The grinding accuracy of the three groups of grinding rollers 22 is different, and the grinding accuracy of the three groups of grinding rollers 22 is gradually precise. When in use, the steel pipe is clamped in the middle of the two groups of first fixed seats 9, and the first motor 4 drives the first threaded shaft 5 to rotate, so that the limit slider 7 moves with the first fixed seat 9 through the support column 8, thereby sending the steel pipe to the coaxial position of the first group of grinding rollers 22, and the second motor 10 rotates the second threaded shaft 11, so that the moving rod 12 pushes the fixed cylinder 13 to move to the specified position, and at the same time, the third threaded shaft 15 is driven to rotate by the third motor 14, and the moving column 17 moves along the third threaded shaft 15 to slide toward the inside of the base 1, so that the moving column 17 pushes the fixed column 18 to move, and the fixed column 18 moves with the grinding roller 22 through the second fixed seat 19 and the rotating shaft 21, so that the rotating shaft 21 and the grinding roller 22 are inserted into the middle of the steel pipe until the rotating shaft 21 is inserted into the fixed cylinder 13 When the third motor 14 stops rotating, the fourth motor 20 drives the rotating shaft 21 to rotate, and the rotating shaft 21 drives the grinding roller 22 to rotate to grind the inside of the steel pipe. After the grinding is completed, the second motor 10 and the third motor 14 rotate in opposite directions to make the rotating shaft 21 leave the inside of the steel pipe. Then the first motor 4 drives the first threaded shaft 5 to rotate, so that the support column 8 pushes the steel pipe to other groups of grinding rollers 22. Then, the above grinding steps are repeated to perform more detailed grinding of the steel pipe, thereby improving the grinding efficiency. When there are too many steel pipes that need to be polished, the first mounting seat 2, the first motor 4, the synchronous wheel 6 and the first threaded shaft 5 can be removed, and three pairs of support columns 8 can be directly installed on the base 1. Each team of support columns 8 is coaxial with a group of grinding rollers 22, so that three groups of steel pipes can be fixed on the base 1 at the same time, and the three groups of steel pipes can be polished at the same time, thereby improving the grinding efficiency and speeding up the production speed.

[0031] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A steel pipe internal grinding mill, comprising a base (1), characterized in that: The middle part of the base (1) is rotatably connected to two groups of first threaded shafts (5), the surfaces of the first threaded shafts (5) are threadedly connected to the limit sliders (7), and the limit sliders (7) are slidably connected to the inside of the base (1), the upper ends of the limit sliders (7) are fixedly connected to the support columns (8), the upper ends of the support columns (8) are fixedly connected to the first fixed seat (9), the upper and lower sides of the first fixed seat (9) are hinged by hinges, one end of the first threaded shafts (5) is fixedly connected to the synchronous wheel (6), and the two groups of synchronous wheels (6) are connected by a synchronous belt, one side of the base (1) is fixedly connected to the first mounting seat (2), the middle part of the first mounting seat (2) is fixedly connected to the first motor (4), and the output end of the first motor (4) is fixedly connected to one end of a group of first threaded shafts (5) passing through the base (1).

2. The steel pipe internal grinding mill according to claim 1, characterized in that: Three groups of second mounting seats (3) are fixedly connected to the side surface of one end of the base (1), a second motor (10) is fixedly connected to the middle of the second mounting seat (3), the output ends of the second motors (10) are fixedly connected to second threaded shafts (11), and the second threaded shafts (11) are rotatably connected to the inside of the base (1), the surfaces of the second threaded shafts (11) are threadedly connected to moving rods (12), and the moving rods (12) are slidably connected to the inside of the base (1), and the upper ends of the moving rods (12) are fixedly connected to a fixing cylinder (13).

3. The steel pipe internal grinding mill according to claim 2, characterized in that: Three groups of third motors (14) are provided at one end of the base (1) close to the second motor (10), and the output ends of the third motors (14) are fixedly connected to third threaded shafts (15). One end of the third threaded shaft (15) away from the third motor (14) is rotatably connected to a first support base (16), and the first support base (16) is fixedly connected to the inside of the base (1).

4. The steel pipe internal grinding mill according to claim 3, characterized in that: The surface of the third threaded shaft (15) is threadedly connected to a moving column (17), and the moving column (17) is slidably connected to the inside of the base (1), and the lower end of the first support seat (16) passes through the lower end of the moving column (17).

5. The steel pipe internal grinding mill according to claim 4, characterized in that: An end of the movable column (17) away from the third motor (14) is fixedly connected to a fixed column (18), an upper end of the fixed column (18) is fixedly connected to a second fixed seat (19), a middle portion of the second fixed seat (19) is fixedly connected to a fourth motor (20), and an output end of the fourth motor (20) is fixedly connected to a rotating shaft (21).

6. The steel pipe internal grinding mill according to claim 5, characterized in that: A fourth motor (20) is provided on the surface of the rotating shaft (21), and one end of the rotating shaft (21) close to the fourth motor (20) is fixedly connected to a limiting ring, and the limiting ring is located at one end of the grinding roller (22).

7. The steel pipe internal grinding mill according to claim 6, characterized in that: A second support seat (23) is fixedly connected to one side of the upper surface of the fixed column (18), and a rotating shaft (21) is rotatably connected to the middle portion of the upper end of the second support seat (23).

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