A tool and method for machining the outer circle of an eccentric workpiece without deformation

Abstract

The application discloses a tool and method for preventing deformation of an eccentric workpiece outer circle, and belongs to the eccentric workpiece machining field. The tool for preventing deformation of the eccentric workpiece outer circle comprises a workpiece body, a stepped cylinder sleeve arranged at one end of the workpiece body, an arc surface arranged between the workpiece body and the stepped cylinder sleeve, an inner groove arranged at the inner side of the workpiece body and the stepped cylinder sleeve, an abutting plate placed at the inner side of the inner groove and at a position corresponding to the stepped cylinder sleeve, a flexible sleeve installed at the outer side of the abutting plate, and a driving mechanism arranged at the inner side of the stepped cylinder sleeve and used for driving the abutting plate to expand, wherein the driving mechanism comprises a rotating rod. The tool can prevent the bending phenomenon from occurring between the stepped cylinder sleeve and the workpiece body, prevent the bending deformation of the stepped cylinder sleeve caused by the centrifugal force of the machine tool rotating speed and the cutting stress of the large machining allowance, and make the production efficiency increased by nearly 4 times, and the position degree requirement of drawings is met.

Description

Technical Field

[0001] This invention relates to the field of eccentric workpiece machining, and more specifically, to a tool and method for machining the outer circle of an eccentric workpiece to prevent deformation. Background Technology

[0002] Currently, eccentric mandrel tools are widely used in oil well completion tools. The eccentricity between the central outer circle and the eccentric outer circle of the workpiece varies from 11mm to 50mm, and the diameter difference is about 50mm-100mm. In addition, the machining allowance for the eccentricity is very large, and the positional accuracy between the 118mm outer circle and the 99.44mm inner hole is required to be within 0.25mm.

[0003] This makes it difficult to ensure that the workpiece does not bend or deform after machining in general machining processes. Even with allowances and roughing and finishing, the requirements of 0.25mm positional accuracy in the drawings cannot be met, resulting in a high scrap rate. To prevent the increase of centrifugal force caused by high speed, the machine tool speed is reduced during machining, resulting in low production efficiency. Therefore, a new type of tool is needed to prevent deformation of the outer circle of eccentric workpieces to solve the above problems. Summary of the Invention

[0004] 1. Technical problems to be solved

[0005] To address the problems existing in the prior art, the purpose of this invention is to provide a tool for preventing deformation of the outer diameter of eccentric workpieces. It ensures that there will be no bending between the stepped sleeve and the workpiece body, and prevents the stepped sleeve from bending and deforming due to centrifugal force of machine tool speed and cutting stress caused by large machining allowance. This improves production efficiency by nearly 4 times, and all meet the positional requirements of the drawings.

[0006] 2. Technical Solution

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] A tool for preventing deformation of the outer circle of an eccentric workpiece includes a workpiece body, a stepped sleeve at one end of the workpiece body, an arc surface between the workpiece body and the stepped sleeve, an inner groove on the inner side of the workpiece body and the stepped sleeve, an abutment plate placed on the inner side of the inner groove and at a position corresponding to the stepped sleeve, and a flexible sleeve installed on the outer side of the abutment plate.

[0009] The inner side of the stepped sleeve is also provided with a driving mechanism, which is used to drive the abutment plate to expand.

[0010] Furthermore, the driving mechanism includes a rotating rod, which is located at the center of the inner side of the built-in groove. One end of the rotating rod is fixed with a reverse screw, and both ends of the reverse screw are threadedly connected with threaded blocks. Multiple swing rods are rotatably connected to the outer side of the threaded blocks. Each swing rod is rotatably connected to a connecting block on the side away from the threaded block. The side of the connecting block away from the swing rod is fixed to the abutment plate.

[0011] A connecting plate is installed on one side of the abutment plate, and a snap-fit ​​structure is installed on the connecting plate. The snap-fit ​​structure is used to clamp the rotating rod and the reverse screw.

[0012] Furthermore, the snap-fit ​​structure includes a mounting groove, which is located on the side of the connecting plate near the rotating rod. A rotating plate is rotatably connected to the inner side of the mounting groove, and the rotating plate is fixedly connected to the rotating rod. A second locking block is provided on the side of the rotating plate near the mounting groove, and a first locking block corresponding to the second locking block is provided on the side of the mounting groove near the second locking block.

[0013] A fixing component is also installed on the rotating rod, which is used to fix the rotating plate.

[0014] Furthermore, the fixing component includes a sliding block, which is slidably connected to the outside of the rotating rod. At least one connecting mounting block is provided on the outside of the sliding block. A plug-in rod is fixed on the side of the connecting mounting block near the connecting plate. Multiple plug-in holes are provided on the outside of the connecting plate and the inside of the rotating plate at positions corresponding to the plug-in rod. A spring is installed between the sliding block and the rotating plate, located on the outside of the rotating rod.

[0015] Furthermore, a groove is provided on the outer side of the rotating rod at a position corresponding to the sliding block, and a sliding square column is fixed on the inner side of the sliding block at a position corresponding to the groove, and the sliding square column and the rotating rod are slidably connected through the groove.

[0016] Furthermore, the abutment plate is arc-shaped, and multiple abutment plates together form a cylindrical shape.

[0017] Furthermore, the sides of the first card block and the second card block that are close to each other are provided with inclined surfaces, and the sides of the first card block and the second card block that are far from each other are provided with right-angled surfaces.

[0018] Furthermore, the lengths of the abutment plate and the flexible sleeve are twice the length of the stepped sleeve.

[0019] Furthermore, the number of the insertion holes is greater than the number of the insertion rods.

[0020] A method for using a tool to prevent deformation during machining the outer diameter of an eccentric workpiece, the method comprising the following steps:

[0021] S1: Insert the abutment plate and flexible sleeve into the inner side of the built-in groove, and add an arc surface in the machine tool program parameters to ensure that there will be no bending between the stepped sleeve and the workpiece body.

[0022] S2: Rotate the rotating rod and hold the abutment plate and flexible sleeve by hand. Through the threaded connection between the reverse screw and the threaded block, drive the abutment plate and flexible sleeve to press against the workpiece body and the stepped sleeve.

[0023] S3: When the rotating rod rotates, it can drive the rotating plate and the second locking block to rotate, so that the rotating plate and the second locking block can only rotate in the direction of pressing the abutment plate against the workpiece body, thereby preventing the rotating rod from reversing due to the high speed of the machine tool.

[0024] S4: By setting the spring, the sliding block moves towards the connecting plate, allowing the plug rod to penetrate the plug hole and insert into the inside of the connecting plate, further restricting the rotating plate and the connecting plate to prevent the rotating plate and the rotating rod from reversing.

[0025] 3. Beneficial effects

[0026] Compared with the prior art, the advantages of this invention are:

[0027] (1) This solution inserts the abutment plate and flexible sleeve into the inner side of the built-in groove and adds an arc surface in the machine tool program parameters. This ensures that there will be no bending between the stepped sleeve and the workpiece body, and prevents the stepped sleeve from bending and deforming due to the centrifugal force of the machine tool speed and the cutting stress caused by the large machining allowance. This improves the production efficiency by nearly 4 times and fully meets the positional requirements of the drawings.

[0028] (2) This solution rotates the rotating rod and holds the abutment plate and flexible sleeve by hand. Through the threaded connection between the reverse screw and the threaded block, the abutment plate and flexible sleeve are driven to press against the workpiece body and the stepped sleeve, thereby providing better support for the workpiece body and the stepped sleeve. This further reduces the bending between the workpiece body and the stepped sleeve and prevents the abutment plate and the workpiece body from separating under the high speed of the machine tool.

[0029] (3) In this solution, when the rotating rod rotates, it can drive the rotating plate and the second locking block to rotate, so that the rotating plate and the second locking block can only rotate in the direction of pressing the abutment plate against the workpiece body. With the setting of the spring, the sliding block moves towards the connecting plate, so that the insertion rod penetrates the insertion hole and inserts into the inner side of the connecting plate, further restricting the rotating plate and the connecting plate, preventing the rotating plate and the rotating rod from reversing, so that the rotating rod will not reverse due to the high speed of the machine tool, and thus the abutment plate will only press against the workpiece body and the stepped sleeve, and will not loosen. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of the present invention;

[0031] Figure 2 This is a cross-sectional view of the workpiece body and the stepped sleeve of the present invention;

[0032] Figure 3 This is a schematic diagram of the structure between the flexible sleeve, the abutment plate, and the swing rod of the present invention;

[0033] Figure 4 This is a schematic diagram of the structure between the reverse screw, the swing rod, and the abutment plate of the present invention;

[0034] Figure 5 This is a schematic diagram of the structure between the spring, the mounting groove, and the second locking block of the present invention;

[0035] Figure 6 This is a schematic diagram of the structure between the insertion hole, spring, and sliding block of the present invention.

[0036] Explanation of the labels in the diagram:

[0037] 1. Workpiece body; 2. Stepped sleeve; 3. Arc surface; 4. Internal groove; 5. Rotating rod; 6. Reverse screw; 7. Threaded block; 8. Swinging rod; 9. Connecting block; 10. Abutment plate; 11. Flexible sleeve; 12. Connecting plate; 13. Mounting groove; 14. First locking block; 15. Rotating plate; 16. Second locking block; 17. Sliding block; 18. Connecting mounting block; 19. Insertion rod; 20. Insertion hole; 21. Spring; 22. Slide groove; 23. Sliding square column. Detailed Implementation

[0038] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0039] Example:

[0040] Please see Figure 1-6 A tool for machining the outer diameter of an eccentric workpiece to prevent deformation includes a workpiece body 1, a stepped sleeve 2 at one end of the workpiece body 1, an arc surface 3 between the workpiece body 1 and the stepped sleeve 2, an inner groove 4 on the inner side of the workpiece body 1 and the stepped sleeve 2, and an abutment plate 10 placed inside the inner groove 4 at a position corresponding to the stepped sleeve 2. The abutment plate 10 is arc-shaped, and multiple abutment plates 10 together form a cylindrical shape. This arrangement ensures that the angle and distance of movement of the abutment plate 10 are uniform when it expands, thus ensuring uniform pressure on all points inside the workpiece body 1. A flexible sleeve 11 is installed on the outer side of the abutment plate 10. By inserting the abutment plate 10 and the flexible sleeve 11 into the inner side of the inner groove 4, the machine tool can perform machining on the workpiece body 1. During machining, to prevent bending deformation of the stepped sleeve 2 caused by the centrifugal force of the machine tool speed and the cutting stress caused by the large machining allowance, the positional accuracy requirements of the drawing are met. In subsequent mass production, no out-of-tolerance or scrap situations occurred, and the positional accuracy of the machining was within 0.2mm. The arc surface 3 is used to reduce the bending between the workpiece body 1 and the stepped sleeve 2 caused by the centrifugal force of rotation, thereby increasing the machining parameters and machine tool speed to 80-100 rpm, increasing production efficiency by nearly 4 times, and all the positional accuracy requirements of the drawing are met. The length of the abutment plate 10 and the flexible sleeve 11 is twice the length of the stepped sleeve 2. Through this setting, the abutment plate 10 provides better support for the stepped sleeve 2, further ensuring that there will be no bending between the stepped sleeve 2 and the workpiece body 1.

[0041] A drive mechanism is also provided on the inner side of the stepped sleeve 2, which is used to drive the expansion of the abutment plate 10.

[0042] See Figure 3-4The driving mechanism includes a rotating rod 5, which is located at the center of the inner side of the built-in groove 4. One end of the rotating rod 5 is fixed with a reverse screw 6. Both ends of the reverse screw 6 are threadedly connected to threaded blocks 7. Multiple swing rods 8 are rotatably connected to the outer side of the threaded blocks 7. Each swing rod 8 is rotatably connected to a connecting block 9 on the side away from the threaded block 7. The side of the connecting block 9 away from the swing rod 8 is fixed to the abutment plate 10. After the abutment plate 10 and the flexible sleeve 11 are placed inside the inner side of the built-in groove 4, rotating the rotating rod 5 causes the reverse screw 6 to rotate. During rotation, the user can hold the rod by hand. With the abutment plate 10 and flexible sleeve 11 in place, when rotating, the threaded connection between the reverse screw 6 and the threaded block 7 causes the threaded block 7 to move in opposite directions simultaneously, which in turn causes the swing rod 8 to swing, driving the connecting block 9 to move away from the reverse screw 6. This causes the abutment plate 10 and flexible sleeve 11 to press against the workpiece body 1 and the stepped sleeve 2, thus providing better support for the workpiece body 1 and the stepped sleeve 2, further reducing bending between the workpiece body 1 and the stepped sleeve 2, and preventing the abutment plate 10 and the workpiece body 1 from separating under high-speed rotation of the machine tool.

[0043] A connecting plate 12 is installed on one side of the abutment plate 10. A snap-fit ​​structure is installed on the connecting plate 12. The snap-fit ​​structure is used to clamp the rotating rod 5 and the reverse screw 6.

[0044] See Figure 5 The snap-fit ​​structure includes a mounting groove 13, which is located on the side of the connecting plate 12 near the rotating rod 5. A rotating plate 15 is rotatably connected to the inner side of the mounting groove 13, and the rotating plate 15 is fixedly connected to the rotating rod 5. A second locking block 16 is provided on the side of the rotating plate 15 near the mounting groove 13, and a first locking block 14 corresponding to the second locking block 16 is provided on the side of the mounting groove 13 near the second locking block 16. Both the first locking block 14 and the second locking block 16 have inclined surfaces on their sides that are close to each other, and both have right-angled surfaces on their sides that are far apart from each other. This design makes it easy for the second locking block 16 to rotate forward, but more difficult to rotate in reverse. This prevents the rotating rod 5 from easily wobbling or even reversing. With this setting, when the rotating rod 5 rotates, it can drive the rotating plate 15 and the second locking block 16 to rotate. Since the connecting plate 12 and the abutment plate 10 slide rather than rotate, the rotating plate 15 and the second locking block 16 can rotate inside the connecting plate 12. As a result, the second locking block 16 can only rotate in the direction of abutment plate 10 pressing against the workpiece body 1 due to the locking of the first locking block 14, and cannot rotate in the opposite direction. This prevents the rotating rod 5 from vibrating due to the high speed of the machine tool, thus preventing the rotating rod 5 from reversing.

[0045] A fixing component is also installed on the rotating rod 5, which is used to fix the rotating plate 15.

[0046] See Figure 6 The fixing component includes a sliding block 17, which is slidably connected to the outside of the rotating rod 5. A groove 22 is provided on the outside of the rotating rod 5 at a position corresponding to the sliding block 17. A sliding square post 23 is fixed on the inside of the sliding block 17 at a position corresponding to the groove 22, and the sliding square post 23 is slidably connected to the rotating rod 5 through the groove 22. This arrangement allows the sliding block 17 to slide on the rotating rod 5 but not to rotate on it. At least one connecting mounting block 18 is provided on the outside of the sliding block 17. A plug-in rod 19 is fixed on the side of the connecting mounting block 18 near the connecting plate 12. Multiple plug-in holes 20 are provided on the outside of the connecting plate 12 and the inside of the rotating plate 15 at positions corresponding to the plug-in rod 19. The number of plug-in holes 20 is greater than the number of plug-in rods 19. This arrangement allows for the plug-in... The rod 19 can be easily inserted into the inside of the insertion hole 20. A spring 21 is installed between the sliding block 17 and the rotating plate 15 and on the outside of the rotating rod 5. After the connecting plate 12 has rotated, the sliding block 17 can be moved closer to the connecting plate 12 by the setting of the spring 21, so that the insertion rod 19 penetrates the insertion hole 20 and is inserted into the inside of the connecting plate 12, thereby further restricting the rotating plate 15 and the connecting plate 12. When it is necessary to loosen the abutment plate 10 and the workpiece body 1, the sliding block 17 can be pulled out so that the insertion rod 19 is no longer in contact with the connecting plate 12. Then, by means of the material setting of the first locking block 14 and the second locking block 16, the user can twist the rotating rod 5 and the rotating plate 15 by force, thereby loosening the abutment plate 10. The first locking block 14 and the second locking block 16 can be made of rubber.

[0047] Example:

[0048] A method for using a tool to prevent deformation during machining of the outer diameter of an eccentric workpiece, the tool comprising the above-mentioned steps:

[0049] Step 1: Insert the abutment plate 10 and flexible sleeve 11 into the inner side of the built-in groove 4, and add the arc surface 3 in the machine tool program parameters to ensure that there is no bending between the stepped sleeve 2 and the workpiece body 1.

[0050] Step 2: Rotate the rotating rod 5 and hold the abutment plate 10 and flexible sleeve 11 by hand. Through the threaded connection between the reverse screw 6 and the threaded block 7, drive the abutment plate 10 and flexible sleeve 11 to press against the workpiece body 1 and the stepped sleeve 2.

[0051] Step 3: When the rotating rod 5 is rotating, it can drive the rotating plate 15 and the second locking block 16 to rotate, so that the rotating plate 15 and the second locking block 16 can only rotate in the direction of pressing the abutting plate 10 against the workpiece body 1, thereby preventing the rotating rod 5 from reversing due to the high speed of the machine tool.

[0052] Step 4: By setting the spring 21, the sliding block 17 moves towards the connecting plate 12, so that the plug rod 19 penetrates the plug hole 20 and is inserted into the inside of the connecting plate 12, further restricting the rotating plate 15 and the connecting plate 12 to prevent the rotating plate 15 and the rotating rod 5 from reversing.

[0053] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A tool for machining the outer diameter of an eccentric workpiece to prevent deformation, comprising a workpiece body (1), characterized in that: A stepped sleeve (2) is provided at one end of the workpiece body (1), an arc surface (3) is provided between the workpiece body (1) and the stepped sleeve (2), an internal groove (4) is provided on the inner side of the workpiece body (1) and the stepped sleeve (2), an abutment plate (10) is placed on the inner side of the internal groove (4) and at the position corresponding to the stepped sleeve (2), and a flexible sleeve (11) is installed on the outer side of the abutment plate (10). The inner side of the stepped sleeve (2) is also provided with a driving mechanism, which is used to drive the abutment plate (10) to expand. The driving mechanism includes a rotating rod (5), which is located at the center of the inner side of the built-in groove (4). One end of the rotating rod (5) is fixed with a reverse screw (6). Both ends of the reverse screw (6) are threaded with threaded blocks (7), and multiple swing rods (8) are rotatably connected to the outside of the threaded blocks (7). Each swing rod (8) is rotatably connected to a connecting block (9) on the side away from the threaded block (7). The side of the connecting block (9) away from the swing rod (8) is fixed to the abutment plate (10). A connecting plate (12) is installed on one side of the abutment plate (10). A snap-fit ​​structure is installed on the connecting plate (12). The snap-fit ​​structure is used to snap the rotating rod (5) and the reverse screw (6). The snap-fit ​​structure includes a mounting groove (13). The mounting groove (13) is located on the side of the connecting plate (12) near the rotating rod (5). A rotating plate (15) is rotatably connected to the inner side of the mounting groove (13). The rotating plate (15) is fixedly connected to the rotating rod (5). A second locking block (16) is provided on the side of the rotating plate (15) near the mounting groove (13). A first locking block (14) corresponding to the second locking block (16) is provided on the side of the mounting groove (13) near the second locking block (16). A fixing component is also installed on the rotating rod (5), which is used to fix the rotating plate (15); The fixing component includes a sliding block (17), which is slidably connected to the outside of the rotating rod (5). At least one connecting mounting block (18) is provided on the outside of the sliding block (17). A plug-in rod (19) is fixed on the side of the connecting mounting block (18) near the connecting plate (12). Multiple plug-in holes (20) are provided on the outside of the connecting plate (12) and the inside of the rotating plate (15) at positions corresponding to the plug-in rod (19). A spring (21) is installed between the sliding block (17) and the rotating plate (15) on the outside of the rotating rod (5).

2. The tool for preventing deformation during machining of the outer diameter of an eccentric workpiece according to claim 1, characterized in that: A groove (22) is provided on the outer side of the rotating rod (5) at a position corresponding to the sliding block (17). A sliding square column (23) is fixed on the inner side of the sliding block (17) at a position corresponding to the groove (22). The sliding square column (23) and the rotating rod (5) are slidably connected through the groove (22).

3. The tool for preventing deformation during machining of the outer diameter of an eccentric workpiece according to claim 1, characterized in that: The abutment plate (10) is arc-shaped, and multiple abutment plates (10) together form a cylindrical shape.

4. The tool for preventing deformation during machining of the outer diameter of an eccentric workpiece according to claim 1, characterized in that: The first card block (14) and the second card block (16) are provided with inclined surfaces on the sides that are close to each other, and the first card block (14) and the second card block (16) are provided with right-angled surfaces on the sides that are far from each other.

5. A tool for preventing deformation during machining of the outer diameter of an eccentric workpiece according to claim 1, characterized in that: The lengths of the abutment plate (10) and the flexible sleeve (11) are twice the length of the stepped sleeve (2).

6. The tool for preventing deformation during machining of the outer diameter of an eccentric workpiece according to claim 1, characterized in that: The number of the insertion holes (20) is greater than the number of the insertion rods (19).

7. A method for using a tool to prevent deformation when machining the outer diameter of an eccentric workpiece, characterized in that: The method, applied to the tool for preventing deformation of the outer diameter of an eccentric workpiece as described in any one of claims 1-6, includes the following steps: S1: Insert the abutment plate (10) and flexible sleeve (11) into the inner side of the built-in groove (4), and add the arc surface (3) in the machine tool program parameters to ensure that there will be no bending between the stepped sleeve (2) and the workpiece body (1). S2: Rotate the rotating rod (5) and hold the abutment plate (10) and flexible sleeve (11) by hand. Through the threaded connection between the reverse screw (6) and the threaded block (7), drive the abutment plate (10) and flexible sleeve (11) to press against the workpiece body (1) and the stepped sleeve (2). S3: When the rotating rod (5) rotates, it can drive the rotating plate (15) and the second locking block (16) to rotate, so that the rotating plate (15) and the second locking block (16) can only rotate in the direction of pressing the abutting plate (10) against the workpiece body (1), so that the rotating rod (5) will not reverse due to the high speed of the machine tool. S4: By setting the spring (21), the sliding block (17) moves towards the connecting plate (12), so that the plug rod (19) penetrates the plug hole (20) and is inserted into the inner side of the connecting plate (12), further restricting the rotating plate (15) and the connecting plate (12) to prevent the rotating plate (15) and the rotating rod (5) from reversing.

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