Automatic plugging system and method for turning internal profile of long through hole

Abstract

The application discloses a kind of automatic plugging system and method for turning long through-hole type inner contour, including numerical control unit, plugging device and tool turret;The tool turret is connected to numerical control unit, and the plugging device is installed on the tool turret, and the plugging device includes plug body and lock release body, the plug body is connected to lock release body, a plug is provided in the plug body, and an annular groove is formed on the outer surface of the plug.The application realizes automatic plugging by using numerical control lathe, can be installed for all general numerical control lathe, and the numerical control machine tool controls each action, the plug installation position consistency is high, efficient automation operation can be realized, no labor intensity, no operation risk, safe and efficient, wide adaptability, with good popularization value.

Description

Technical Field

[0001] This invention belongs to the field of mechanical manufacturing, and in particular to an automatic blocking system and method for turning the inner contour of long through holes. Background Technology

[0002] During the machining of through-hole pipes on traditional CNC lathes, the cutting fluid remaining inside the part flows backward along the rotating inner wall, leaking into electrical components such as the spindle, cylinders, hydraulic station, and spindle motor. For parts with an axial length greater than the spindle length, significant amounts of cutting fluid leak onto the workshop floor outside the machine tool's protective shield. Current technology involves manually inserting simple plugs into the part's inner contour before machining and removing them afterward. This process is cumbersome, time-consuming, and labor-intensive. Due to the manual operation, the resistance cannot be too high, resulting in incomplete sealing of the cutting fluid and metal chips. Manual insertion also allows for large errors in installation position, easily leading to incomplete sealing and leakage. The labor-saving aspect of manual operation and the need for a tight seal are contradictory and difficult to achieve simultaneously. Furthermore, the plug material is prone to wear and has a short service life. Upgrading the existing machine tool protection system would increase costs excessively and yield unsatisfactory results. Summary of the Invention

[0003] The purpose of this invention is to solve the problems in the prior art by providing an automatic plugging system and method for turning the inner contour of long through holes, thereby solving the problem of cutting fluid leakage along the inner wall due to poor sealing during the turning of long through hole parts.

[0004] To achieve the above objectives, the present invention employs the following technical solution:

[0005] An automatic clogging system for turning the inner contour of long through holes includes a CNC unit, a clogging device, and a tool turret;

[0006] The turret is connected to the CNC unit, and the blocking device is installed on the turret. The blocking device includes a blocking body and a locking body. The blocking body is connected to the locking body. A plug is provided in the blocking body, and several annular grooves are formed on the outer circumference of the plug.

[0007] Furthermore, it also includes a CNC lathe, on which the sample long steel pipe is mounted, and the CNC unit and the tool turret are mounted on the CNC lathe.

[0008] Furthermore, the plug body includes a clamping nut, a plug, and a movable rod. The plug has a through hole in its center, and the movable rod passes through the through hole and is threadedly fixed to the clamping nut.

[0009] Furthermore, the movable rod is provided with a boss structure.

[0010] Furthermore, the plug is made of polyurethane rubber.

[0011] Furthermore, the locking body includes a locking block and a locking cylinder, the locking cylinder having an inner hole, and the locking block being installed in the inner hole of the locking cylinder.

[0012] Furthermore, the locking cylinder has a recessed structure inside, and a boss structure for installing the movable rod is installed in the recessed structure of the locking cylinder.

[0013] Furthermore, the locking body also includes a fixing handle, one end of which is fixedly connected to the locking cylinder by a thread, and the other end of which is clamped and mounted on the turret.

[0014] Furthermore, the locking body also includes a spring and an adjusting nut, which are installed in the inner hole of the locking cylinder. One end of the spring is sleeved on one end of the locking block, and the other end of the spring is sleeved on the adjusting nut.

[0015] An automatic plugging method for turning the inner contour of a long through hole using the system described above includes:

[0016] The fixing handle of the plugging device is clamped on the turret. Under the program control of the CNC unit, the X-axis and Z-axis on the turret move in linkage to position the zero point of the sample. The feed action of the Z-axis inserts the plug into the inner contour of the sample. The plugging body is disconnected from the locking body. The locking body returns to the zero point position and begins to process the inner contour of the sample.

[0017] After machining is completed, the CNC unit once again controls the turret to quickly position itself via the program. The X and Z axes on the turret move in tandem to remove the plug and move the blocking device to a safe position.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This invention provides an automatic plugging system for machining the inner contour of long through holes. Utilizing the CNC unit and tool turret of a CNC lathe, under the control of the CNC program, the X and Z axes of the tool turret are servo-linked, causing the plugging device to automatically move and insert into the inner contour of the sample, achieving automatic plugging. The outer circumference of the plug has several annular grooves. The plug's interference fit is reasonably designed, ensuring the uniqueness of its position within the inner contour under the action of friction and shear forces, achieving a tight seal and complete plugging effect. This invention utilizes a CNC lathe for automatic plugging, is applicable to all general-purpose CNC lathes, and the CNC machine tool controls all actions, ensuring high consistency in plug installation position. It achieves highly efficient automated operation, requiring no human intervention, eliminating labor intensity and operational risks, and is safe, efficient, and widely adaptable, possessing significant promotional value.

[0020] Furthermore, the stopper is made of polyurethane rubber, which has good wear resistance and a long service life. After more than 6,000 material tests, it was finally determined that the wear of the stopper does not exceed 5%, which can achieve complete sealing. Ultimately, one stopper can be reused normally more than 1,200 times, with low cost, high reliability, and better adaptability.

[0021] Furthermore, under the control of the CNC program, the X and Z axes of the turret are servo-linked, and the positioning accuracy of the blocking device reaches more than 0.01mm.

[0022] Furthermore, the clamping part of the blocking device has a standard structure, making it easy to install and disassemble, and suitable for all general-purpose CNC lathes.

[0023] Furthermore, under the control of the CNC program, the blocking device has undergone more than 6,000 insertion and removal experiments, and the success rate of automatic insertion and removal can reach 100%. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the automatic blocking system for turning the inner contour of long through holes according to the present invention.

[0026] Figure 2 This is a schematic diagram of the blocking device structure of the present invention.

[0027] Figure 3 This is a schematic diagram of the blockage body structure of the present invention.

[0028] Figure 4 This is a schematic diagram of the locking and releasing body structure of the present invention.

[0029] Among them: 1-CNC lathe, 2-long steel pipe, 3-CNC unit, 4-blocking device, 5-turret, 6-clamping nut, 7-plug, 8-moving rod, 9-locking block, 10-locking cylinder, 11-fixed handle, 12-spring, 13-adjusting nut. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0034] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0035] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0036] The present invention will now be described in further detail with reference to the accompanying drawings:

[0037] See Figure 1 This invention provides an automatic plugging system for turning the inner contour of long through holes, comprising a CNC lathe 1, a CNC unit 3, a plugging device 4, and a tool turret 5. The plugging device 4 is clamped and mounted on the tool turret 5 via a standard-sized shank, and the tool turret 5 is mounted on the CNC lathe 1. The tool turret 5 is connected to the CNC unit 3, which is also mounted on the CNC lathe 1. A sample long steel pipe 2 is mounted on the CNC lathe 1.

[0038] The blocking device includes a blocking body and a locking body. The blocking body includes a clamping nut 6, a plug 7, and a movable rod 8. The plug 7 has a through hole in its center, through which it is inserted and installed on the left end of the movable rod 8. The clamping nut 6 then presses the plug 7 against the boss structure in the middle of the movable rod 8. The movable rod 8 passes through the through hole and is threadedly fixed to the clamping nut 6. The plug 7 is made of polyurethane rubber, which has good wear resistance and a long service life. Several annular grooves are formed on the outer circumference of the plug 7 to achieve sealing. The plug is designed with a reasonable interference fit, ensuring the uniqueness of its position within the inner contour of the plug under friction and shear forces, achieving a tight seal and complete blockage, resulting in a good sealing effect. The right end of the movable rod 8 has a boss structure, which allows for the insertion and removal of the blocking body and can be installed in the concave structure on the left end of the locking cylinder 10 in the locking body.

[0039] The locking body includes a locking block 9, a locking cylinder 10, a fixing handle 11, a spring 12, and an adjusting nut 13. The locking cylinder 10 has an inner hole, and the locking block 9 is installed in this inner hole. The spring 12 and the adjusting nut 13 are also installed in the inner hole of the locking cylinder 10, and the spring 12 and adjusting nut 13 press the locking block 9 firmly into the inner hole of the locking cylinder 10. One end of the spring 12 is fitted onto one end of the locking block 9, and the other end is fitted onto the adjusting nut 13. The compression length of the spring 12 is adjusted by the thread of the adjusting nut 13 to overcome the frictional force during insertion and removal of the locking body, thus achieving operational stability. After the locking block 9, spring 12, and adjusting nut 13 are installed into the locking cylinder 10, one end of the fixing handle 11 is fastened to the right end of the locking cylinder 10 via an external thread. The other end of the fixing handle 11 is clamped and mounted on the tool turret 5. The clamping part of the fixing handle 11 has a standard structure, making installation and disassembly simple and suitable for all general-purpose CNC lathes. The left end of the locking cylinder 10 has a concave structure, in which the boss structure of the movable rod 8 is installed. During the inner contour machining process, the concave structure of the locking cylinder 10 can be disconnected from the boss structure of the movable rod 8, facilitating the insertion and removal of the plug body without affecting the inner contour machining.

[0040] The plugging device primarily functions as a locking and releasing mechanism. The plug 7 is fixed to the movable rod 8 by a clamping nut 6, allowing it to be inserted entirely into the inner contour of the sample for sealing. The plug 7 is made of polyurethane rubber, with multiple annular grooves machined on its outer surface to ensure its durability under friction and shear forces. The locking cylinder 10 contains a locking block 9, a spring 12, and an adjusting nut 13. The compression length of the spring 12 is adjusted by the thread of the adjusting nut 13, enabling the insertion and removal of the plug.

[0041] The present invention provides an automatic clogging method for machining the inner contour of long through holes:

[0042] The fixing handle 11 of the blocking device 4 is clamped on the turret 5. Under the control of the CNC unit 3, the X and Z axes of the turret 5 move rapidly to the zero point position of the sample according to the CNC program. After the Z axis feed action inserts the plug 7 into the inner contour of the sample, the movable rod 8 is disconnected from the locking cylinder 10. The plug 7 is released by the mechanical structure combined with the X and Z axis movements. After the locking and releasing body quickly returns to the zero point position, the machine tool performs the inner contour machining. After the inner contour machining is completed, the CNC unit 3 controls the turret 5 to move rapidly again. After the X and Z axes on the turret 5 move in linkage, the plug 7 is removed from the inner contour of the sample. The blocking device 4 then moves rapidly to the safe position of the machine tool.

[0043] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An automatic plugging system for turning the inner contour of long through holes, characterized in that, Includes a numerical control unit (3), a blocking device (4), and a turret (5); The turret (5) is connected to the CNC unit (3), and the blocking device (4) is installed on the turret (5). The blocking device (4) includes a blocking body and a locking body. The blocking body is connected to the locking body. A plug (7) is provided in the blocking body. Several annular grooves are opened on the outer surface circumference of the plug (7). The locking body also includes a fixing handle (11), one end of which is fixedly connected to the locking cylinder (10) by a thread, and the other end of which is clamped and mounted on the turret (5); The locking body also includes a spring (12) and an adjusting nut (13). The spring (12) and the adjusting nut (13) are installed in the inner hole of the locking cylinder (10). One end of the spring (12) is sleeved on one end of the locking block (9), and the other end of the spring (12) is sleeved on the adjusting nut (13).

2. The automatic plugging system for turning the inner contour of long through holes according to claim 1, characterized in that, It also includes a CNC lathe (1), on which a sample long steel pipe (2) is installed, and the CNC unit (3) and the turret (5) are installed on the CNC lathe (1).

3. The automatic plugging system for turning the inner contour of long through holes according to claim 1, characterized in that, The plug body includes a clamping nut (6), a plug (7) and a movable rod (8). The plug (7) has a through hole in the center, and the movable rod (8) passes through the through hole and is threadedly fixed to the clamping nut (6).

4. The automatic plugging system for turning the inner contour of long through holes according to claim 3, characterized in that, The movable rod (8) is provided with a boss structure.

5. An automatic plugging system for turning the inner contour of long through holes according to claim 1, characterized in that, The plug (7) is made of polyurethane rubber.

6. The automatic plugging system for turning the inner contour of long through holes according to claim 1, characterized in that, The locking body includes a locking block (9) and a locking cylinder (10). The locking cylinder (10) has an inner hole, and the locking block (9) is installed in the inner hole of the locking cylinder (10).

7. An automatic plugging system for turning the inner contour of long through holes according to claim 6, characterized in that, The locking cylinder (10) has a concave structure inside, and the protrusion structure of the movable rod (8) is installed in the concave structure of the locking cylinder (10).

8. An automatic plugging method for turning the inner contour of a long through hole using the system described in any one of claims 1 to 7, characterized in that, include: The fixing handle (11) of the blocking device (4) is clamped on the turret (5). Under the program control of the CNC unit (3), the X-axis and Z-axis on the turret (5) move in linkage and are positioned to the zero point of the sample. The feed action of the Z-axis inserts the plug (7) into the inner contour of the sample. The blocking body is disconnected from the locking body. The locking body returns to the zero point and begins to process the inner contour of the sample. After the machining is completed, the CNC unit (3) once again controls the turret (5) to quickly position through the program. The X-axis and Z-axis on the turret (5) move together to remove the plug (7) and move the blocking device (4) to a safe position.

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