Pipe inner diameter polishing tool

Abstract

The invention provides a pipe inner diameter grinding tool. The pipe inner diameter grinding tool comprises a main rod body, a plurality of grinding heads, an elastic assembly and an adapter; the grinding heads are arranged on the peripheral portion of the main rod body, the multiple grinding heads are evenly arranged around the main rod body and can move in the radial direction of the main rod body, the elastic assembly is arranged on the main rod body and connected with the grinding heads, and when the grinding heads move towards the interior of the main rod body in the radial direction of the main rod body, the grinding heads are driven by the elastic assembly to move towards the interior of the main rod body. The elastic assembly generates elastic deformation, the elastic force of the elastic assembly drives the grinding head to move towards the outside of the main rod body in the radial direction of the main rod body, and the adapter is connected with the main rod body and used for being connected with a power assembly. Compared with the prior art, the pipe inner diameter grinding tool can grind pipes with different calibers, the grinding quality is high, the coaxiality with the pipes is high, the axis position of an original pipe is not prone to being changed, and compared with a traditional grinding tool, the pipe inner diameter grinding tool is more efficient, more convenient to use and good in quality performance.

Description

Technical Field

[0001] The invention relates to the technical field of pipe processing, and in particular to a pipe inner diameter grinding tool. Background Art

[0002] In engineering practice, the structure of thick pipes over thin pipes is often used, and there are high requirements for the coordination between the two. For example, in the UAV industry, the thick inner diameter of carbon pipes over the thin outer diameter of carbon pipes is used as the force transmission form of the aircraft wing body. Due to the limitation of the processing and manufacturing form, the inner diameter of the purchased carbon pipes generally does not meet the requirements, and the inner wall of the pipe needs to be polished to change the inner diameter of the pipe.

[0003] The existing pipe inner diameter grinding tools on the market are either inefficient or have poor quality performance during operation. For example, the existing metal grinding heads or sandpaper grinding heads on the market can only grind pipes of a single caliber. If grinding pipes of different inner diameters, grinding heads of different diameters need to be replaced, and it is impossible to ensure that the inner diameter of the pipe after grinding is coaxial with the original state, causing the inner diameter axis of the pipe after grinding to be offset. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings and deficiencies in the prior art and provide a pipe inner diameter grinding tool.

[0005] One embodiment of the present invention provides a tube inner diameter grinding tool, comprising: a main rod body, a plurality of grinding heads, an elastic component and an adapter;

[0006] The grinding head is arranged on the outer periphery of the main rod body, and a plurality of the grinding heads are evenly arranged around the main rod body and can move in the radial direction of the main rod body. The elastic component is arranged on the main rod body and connected to the grinding head. When the grinding head moves into the main rod body along the radial direction of the main rod body, the elastic component generates elastic deformation, and the elastic force of the elastic component drives the grinding head to move out of the main rod body along the radial direction of the main rod body. The adapter is connected to the main rod body for connecting to a power component.

[0007] In some optional embodiments, an active cavity is provided in the main rod body, and a plurality of side slide grooves communicating with the active cavity are provided on the outer periphery of the main rod body, and the side slide grooves are evenly arranged around the active cavity;

[0008] The grinding head is slidably matched with the side sliding groove, the grinding head can move relative to the side sliding groove along the radial direction of the main rod body, and the grinding head is provided with a first inclined guide portion;

[0009] The elastic component includes a push rod and an elastic member, the push rod is provided with a plurality of second inclined guide parts, the second inclined guide parts are slidably matched with the first inclined guide parts, the elastic member is arranged in the active cavity, and is connected to the push rod, when the grinding head moves toward the active cavity along the radial direction of the main rod body, the second inclined guide part slides relative to the first inclined guide part to drive the push rod to move, and after the push rod moves, the elastic member is driven to produce elastic deformation, and the elastic member drives the grinding head to move along the radial direction of the main rod body toward the outside of the main rod body through the push rod.

[0010] In some optional embodiments, the second inclined guide portion is arranged around the push rod and slidably cooperates with the first inclined guide portions of the plurality of grinding heads.

[0011] In some optional embodiments, a guide hole is provided in the main rod body, and a portion of the push rod extends into the guide hole and slidably cooperates with the guide hole.

[0012] In some optional embodiments, the elastic member is a spring, and the spring is sleeved on the outside of the push rod.

[0013] In some optional embodiments, a first mounting opening is provided at one end of the movable cavity, an end cover is detachably provided at the first mounting opening, and an avoidance hole is provided on the end cover;

[0014] A limiting step is formed on one side of the second inclined guide portion, and two ends of the elastic member respectively abut against the end cover and the limiting step. When the grinding head moves along the radial direction of the main rod body toward the active cavity to drive the push rod to move, the end of the push rod passes through the avoidance hole and extends out of the active cavity.

[0015] In some optional embodiments, a second mounting port for the grinding head to pass through is provided at one end of the side slide groove toward the end cover, the second mounting port is connected to the first mounting port, and the end cover closes the first mounting port and the second mounting port.

[0016] In some optional embodiments, an adjusting member is movably provided on the main rod body, and the adjusting member cooperates with the grinding head to limit the maximum distance that the grinding head can move along the radial direction of the main rod body toward the outside of the main rod body.

[0017] In some optional embodiments, an adjusting member is movably provided on the main rod body, the adjusting member can move along the axial direction of the main rod body, and a limiting portion is provided on the adjusting member;

[0018] The grinding head is provided with a third inclined guide portion, the limiting portion is limitedly matched with the third inclined guide portion, and the adjusting member limits the maximum distance that the grinding head moves toward the outside of the main rod body along the radial direction of the main rod body by limiting the position of the third inclined guide portion.

[0019] In some optional embodiments, the adjusting member includes a knob and a lock nut, the lock nut is threadedly engaged with the main rod body and connected to the knob, the knob is sleeved on the main rod body, a groove is provided on the knob, the limiting portion is provided on the inner wall of the groove, and a portion of the third inclined guide portion extends into the groove.

[0020] Compared with the prior art, the pipe inner diameter grinding tool of the present invention can grind pipes of different calibers, has high grinding quality, high coaxiality with the pipe, and is not easy to change the axial position of the original pipe. Compared with traditional grinding tools, it is more efficient, convenient, and has good quality and performance.

[0021] In order to more clearly understand the present invention, the specific implementation of the present invention will be described below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic structural diagram of a pipe inner diameter grinding tool according to an embodiment of the present invention;

[0023] Figure 2 An exploded view of a pipe inner diameter grinding tool according to an embodiment of the present invention;

[0024] Figure 3 A cross-sectional view of a pipe inner diameter grinding tool according to an embodiment of the present invention;

[0025] Figure 4 A schematic diagram of the structure of a grinding head according to an embodiment of the present invention;

[0026] Figure 5 A schematic structural diagram of a main rod body according to an embodiment of the present invention;

[0027] Figure 6 A schematic diagram of the structure of an elastic component according to an embodiment of the present invention;

[0028] Figure 7 The figure is a schematic structural diagram of an adjusting member according to an embodiment of the present invention.

[0029] Description of reference numerals:

[0030] 10. Main rod body; 11. Movable cavity; 12. Side slide groove; 13. Guide hole; 14. First mounting port; 15. End cover; 16. Avoidance hole; 17. Second mounting port; 18. Mounting groove; 20. Grinding head; 21. First inclined guide portion; 22. Third inclined guide portion; 30. Elastic component; 31. Push rod; 32. Elastic member; 33. Second inclined guide portion; 34. Limiting step; 40. Adapter; 50. Adjusting member; 51. Limiting portion; 52. Knob; 53. Anti-loosening nut; 54. Groove. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Figures 1 to 3 One embodiment of the present invention provides a tube inner diameter grinding tool, including: a main rod body 10, a plurality of grinding heads 20, an elastic component 30 and an adapter 40.

[0032] The grinding head 20 is arranged at the outer periphery of the main rod body 10, and a plurality of grinding heads 20 are evenly arranged around the main rod body 10 and can move in the radial direction of the main rod body 10. The elastic component 30 is arranged on the main rod body 10 and connected to the grinding head 20. When the grinding head 20 moves inward along the radial direction of the main rod body 10, the elastic component 30 generates elastic deformation, and the elastic force of the elastic component 30 drives the grinding head 20 to move outward along the radial direction of the main rod body 10. The adapter 40 is connected to the main rod body 10 for connecting to the power component. The power component can be a device such as a hand drill that drives the adapter 40 to rotate.

[0033] The grinding head 20 is pressed into the main rod body 10, and then the main rod body 10 is extended into the pipe. The elastic force of the elastic component 30 will push the grinding head 20 against the inner wall of the pipe. The adapter 40 is installed on the power component. The power component drives the adapter 40 to rotate, and then the main rod body 10 drives the grinding head 20 to rotate inside the pipe. The grinding head 20 will grind the inner wall of the pipe to expand the inner diameter of the pipe. Because the multiple grinding heads 20 are pushed against the inner wall of the pipe by the elastic component 30, they jointly push the main rod body 10 to the middle position of the pipe, so that the main rod body 10 and the pipe have a high coaxiality, which effectively improves the grinding quality.

[0034] A grinding texture or a grinding structure is formed on a side of the grinding head 20 facing the outside of the main rod body 10 .

[0035] See also Figures 2 to 6In some optional embodiments, an active cavity 11 is provided in the main rod body 10, and a plurality of side slide grooves 12 communicating with the active cavity 11 are provided on the outer periphery of the main rod body 10, and the side slide grooves 12 are evenly arranged around the active cavity 11; the grinding head 20 is slidably matched with the side slide grooves 12, and the grinding head 20 can move along the radial direction of the main rod body 10 relative to the side slide grooves 12, and the side slide grooves 12 enable the grinding head 20 to move stably, and a first inclined guide portion 21 is provided on the grinding head 20. The elastic component 30 includes a top rod 31 and an elastic member 32, and a plurality of second inclined guide portions 33 are provided on the top rod 31, and the second inclined guide portions 33 are slidably matched with the first inclined guide portion 21, and the elastic member 32 is provided in the active cavity 11 and connected to the top rod 31. The grinding head 20 is pressed into the main rod body 10, and then the main rod body 10 is extended into the inside of the pipe. The grinding head 20 is pressed and moves toward the active cavity 11 along the radial direction of the main rod body 10. At this time, the second inclined guide part 33 slides relative to the first inclined guide part 21 to drive the push rod 31 to move. After the push rod 31 moves, it will drive the elastic member 32 to produce elastic deformation. The elastic member 32 drives the grinding head 20 to move outside the main rod body 10 along the radial direction of the main rod body 10 through the push rod 31, so that the grinding head 20 is pressed against the inner wall of the pipe.

[0036] In some optional embodiments, the second inclined guide portion 33 is arranged around the top rod 31 and slidably cooperates with the first inclined guide portions 21 of the plurality of grinding heads 20. The second inclined guide portion 33 adopts an annular structure, which is convenient for production and is beneficial for cooperating with the first inclined guide portion 21, thereby preventing the top rod 31 from rotating in the active cavity 11 and causing the first inclined guide portion 21 and the second inclined guide portion 33 to disengage from each other.

[0037] In some optional embodiments, a guide hole 13 is provided in the main rod body 10, and a portion of the push rod 31 extends into the guide hole 13 and slides with the guide hole 13. The guide hole 13 guides the push rod 31 to move along the axial direction of the main rod body 10, thereby improving the movement stability and position stability of the push rod 31, and avoiding the push rod 31 from offsetting and shaking, which may cause different thrusts on different grinding heads 20.

[0038] In some optional embodiments, the elastic member 32 is a spring, and the spring is sleeved on the outside of the top rod 31 to facilitate the installation of the elastic member 32. Of course, the elastic member 32 can also adopt other suitable structures or installation methods.

[0039] In some optional embodiments, a first mounting opening 14 is provided at one end of the active cavity 11, and an end cover 15 is detachably provided at the first mounting opening 14, and an avoidance hole 16 is provided on the end cover 15; a limiting step 34 is formed on one side of the second inclined guide portion 33, and two ends of the elastic member 32 respectively abut the end cover 15 and the limiting step 34. When the grinding head 20 moves along the radial direction of the main rod body 10 toward the active cavity 11 to drive the push rod 31 to move, the end of the push rod 31 passes through the avoidance hole 16 and extends out of the active cavity 11, thereby avoiding the push rod 31. This design is conducive to shortening the volume of the active cavity 11, thereby reducing the size of the main rod body 10. In addition, since the length of the push rod 31 extending to the avoidance hole 16 matches the distance that the grinding head 20 is pushed out of the active cavity 11, and the grinding head 20 abuts against the inner wall of the pipe, the inner diameter of the pipe matches the distance that the grinding head 20 is pushed out of the active cavity 11, that is, the inner diameter of the pipe matches the length of the push rod 31 extending to the avoidance hole 16. The user can observe the length of the push rod 31 extending out of the avoidance hole 16 to judge the change in the inner diameter of the pipe, thereby facilitating precise control of the grinding process. In addition, a plurality of first scale marks can be arranged on the push rod 31, and the plurality of first scale marks are arranged along the axial direction of the push rod 31. The first scale marks can be observed on the portion of the push rod 31 extending out of the avoidance hole 16. The first scale mark corresponding to the edge of the avoidance hole 16 corresponds to the current inner diameter of the pipe, thereby facilitating grinding judgment.

[0040] In some optional embodiments, the side slide groove 12 is provided with a second mounting opening 17 for the grinding head 20 to pass through at one end facing the end cover 15, the second mounting opening 17 extends along the axial direction of the main rod body 10, and is in a strip shape, the second mounting opening 17 is connected to the first mounting opening 14, and the end cover 15 closes the first mounting opening 14 and the second mounting opening 17, and the first mounting opening 14 facilitates the installation and positioning of the grinding head 20. In this embodiment, a mounting groove 18 is formed on one side of the end cover 15, and the head end of the grinding head 20 and part of the main rod body 10 extend into the mounting groove 18, and the end cover 15 limits the axial position of the grinding head 20 relative to the main rod body 10.

[0041] See also Figure 7In some optional embodiments, an adjusting member 50 is movably provided on the main rod body 10, and the adjusting member 50 is limitedly matched with the grinding head 20, and can limit the maximum distance that the grinding head 20 moves toward the outside of the main rod body 10 along the radial direction of the main rod body 10. After the grinding head 20 is pressed toward the movable cavity 11, the grinding head 20 is separated from the adjusting member 50, and the main rod body 10 is extended into the pipe. During the grinding process of the grinding head 20, the grinding head 20 will press the inner wall of the pipe under the pressure of the elastic component 30. As the grinding head 20 grinds, the inner diameter of the pipe gradually expands. In order to facilitate the determination of the maximum inner diameter of the pipe grinded by the grinding head 20, after the grinding head 20 abuts against the adjusting member 50, it is restricted by the adjusting member 50 and cannot continue to move toward the outside of the main rod body 10 along the radial direction of the main rod body 10, so that the inner diameter of the pipe will not be further expanded. Therefore, the maximum inner diameter of the grinded pipe can be determined by the adjusting member 50.

[0042] In some optional embodiments, an adjusting member 50 is movably provided on the main rod body 10, and the adjusting member 50 can move along the axial direction of the main rod body 10, and a limiting portion 51 is provided on the adjusting member 50; a third inclined guide portion 22 is provided on the grinding head 20, and the limiting portion 51 cooperates with the third inclined guide portion 22 in a limiting manner, and the adjusting member 50 limits the maximum distance that the grinding head 20 moves toward the outside of the main rod body 10 along the radial direction of the main rod body 10 by limiting the position of the third inclined guide portion 22. Through the cooperation between the third inclined guide portion 22 and the limiting portion 51, it is convenient to infinitely adjust the maximum distance that the grinding head 20 moves toward the outside of the main rod body 10 along the radial direction of the main rod body 10. Since the maximum distance that the grinding head 20 moves along the radial direction of the main rod body 10 toward the outside of the main rod body 10 corresponds to the maximum inner diameter that can be grinded, in some optional embodiments, a plurality of second scale marks can be arranged on the third inclined guide portion 22, and the second scale marks correspond to the maximum inner diameter of the pipe that can be grinded. When the limiting portion 51 abuts against the third inclined guide portion 22, the second scale mark corresponding to the limiting portion 51 corresponds to the current maximum inner diameter of the pipe that can be grinded, which is convenient for the user to adjust the maximum inner diameter of the pipe that can be grinded by the grinding head 20

[0043] The specific structure of the adjusting member 50 can be designed according to actual needs. For example, in some optional embodiments, the adjusting member 50 includes a knob 52 and a locking nut 53. The locking nut 53 is threadedly matched with the main rod body 10 and connected to the knob 52. The knob 52 is sleeved on the main rod body 10. The knob 52 is provided with a groove 54. The limiting portion 51 is provided on the inner wall of the groove 54. Part of the third inclined guide portion 22 extends into the groove 54. The knob 52 is rotated to rotate the locking nut 53 relative to the main rod body 10, thereby adjusting the axial position of the knob 52 and the locking nut 53 on the main rod body 10, thereby adjusting the position of the limiting portion 51, and the adjustment operation is more convenient. In this embodiment, the limiting portion 51 is an annular conical surface arranged obliquely, which abuts against the plurality of third inclined guide portions 22.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pipe inner diameter grinding tool, characterized in that: include: A main rod body, a plurality of grinding heads, an elastic component and an adapter; The grinding head is arranged on the outer periphery of the main rod body, and a plurality of the grinding heads are evenly arranged around the main rod body and can move in the radial direction of the main rod body. The elastic component is arranged on the main rod body and connected to the grinding head. When the grinding head moves into the main rod body along the radial direction of the main rod body, the elastic component generates elastic deformation, and the elastic force of the elastic component drives the grinding head to move out of the main rod body along the radial direction of the main rod body. The adapter is connected to the main rod body for connecting to a power component.

2. A pipe inner diameter grinding tool according to claim 1, characterized in that: An active cavity is provided in the main rod body, and a plurality of side sliding grooves communicating with the active cavity are provided on the outer periphery of the main rod body, and the side sliding grooves are evenly arranged around the active cavity; The grinding head is slidably matched with the side sliding groove, the grinding head can move relative to the side sliding groove along the radial direction of the main rod body, and the grinding head is provided with a first inclined guide portion; The elastic component includes a push rod and an elastic member, the push rod is provided with a plurality of second inclined guide parts, the second inclined guide parts are slidably matched with the first inclined guide parts, the elastic member is arranged in the active cavity, and is connected to the push rod, when the grinding head moves toward the active cavity along the radial direction of the main rod body, the second inclined guide part slides relative to the first inclined guide part to drive the push rod to move, and after the push rod moves, the elastic member is driven to produce elastic deformation, and the elastic member drives the grinding head to move along the radial direction of the main rod body toward the outside of the main rod body through the push rod.

3. A pipe inner diameter grinding tool according to claim 2, characterized in that: The second inclined guide portion is arranged around the push rod and is slidably matched with the first inclined guide portions of the plurality of grinding heads.

4. A pipe inner diameter grinding tool according to claim 2, characterized in that: A guide hole is provided in the main rod body, and a portion of the push rod extends into the guide hole and slides in cooperation with the guide hole.

5. The tube inner diameter grinding tool according to claim 2, characterized in that: The elastic member is a spring, and the spring is sleeved on the outer side of the push rod.

6. A pipe inner diameter grinding tool according to claim 2, characterized in that: A first mounting opening is provided at one end of the movable cavity, an end cover is detachably provided at the first mounting opening, and an avoidance hole is provided on the end cover; A limiting step is formed on one side of the second inclined guide portion, and two ends of the elastic member respectively abut against the end cover and the limiting step. When the grinding head moves along the radial direction of the main rod body toward the active cavity to drive the push rod to move, the end of the push rod passes through the avoidance hole and extends out of the active cavity.

7. A pipe inner diameter grinding tool according to claim 6, characterized in that: A second mounting opening for the grinding head to pass through is arranged at one end of the side slide groove facing the end cover, the second mounting opening is communicated with the first mounting opening, and the end cover closes the first mounting opening and the second mounting opening.

8. A pipe inner diameter grinding tool according to any one of claims 1 to 7, characterized in that: An adjusting member is movably provided on the main rod body, and the adjusting member is limitedly matched with the grinding head and can limit the maximum distance that the grinding head moves toward the outside of the main rod body along the radial direction of the main rod body.

9. A pipe inner diameter grinding tool according to any one of claims 2 to 7, characterized in that: An adjusting member is movably provided on the main rod body, the adjusting member can move along the axial direction of the main rod body, and a limiting portion is provided on the adjusting member; The grinding head is provided with a third inclined guide portion, the limiting portion is limitedly matched with the third inclined guide portion, and the adjusting member limits the maximum distance that the grinding head moves toward the outside of the main rod body along the radial direction of the main rod body by limiting the position of the third inclined guide portion.

10. A pipe inner diameter grinding tool according to claim 9, characterized in that: The adjusting member includes a knob and a locking nut, the locking nut is threadedly engaged with the main rod body and connected to the knob, the knob is sleeved on the main rod body, a groove is provided on the knob, the limiting portion is provided on the inner wall of the groove, and part of the third inclined guide portion extends into the groove.

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