Automatic blocking system and method for turning inner contours of long through holes

Abstract

The invention discloses an automatic blocking system and method for turning a long through hole type inner contour. The automatic blocking system comprises a numerical control unit, a blocking device and a tool turret. The tool turret is connected with the numerical control unit, the blocking device is installed on the tool turret and comprises a blocking body and a locking and releasing body, the blocking body is connected with the locking and releasing body, a plug is arranged in the blocking body, and an annular groove is formed in the circumference of the outer surface of the plug. Automatic blocking is achieved through the numerically-controlled lathe, the plug can be installed and suitable for all general numerically-controlled lathes, the numerically-controlled lathes control all actions, the plug installation position consistency is high, efficient automatic operation can be achieved, manual operation is not needed, labor intensity is avoided, operation risks are avoided, safety and efficiency are achieved, adaptability is wide, and good popularization value is achieved.

Description

Technical Field

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

[0002] During the process of turning the inner contour of through-hole tubes on traditional CNC lathes, the cutting fluid retained in the parts flows backward along the inner wall of the rotating parts, and the cutting fluid leaks to the electrical components such as the spindle, oil cylinder, hydraulic station, and spindle motor. Even for some parts whose axial length is greater than the spindle length, the cutting fluid leaks a large amount to the workshop floor outside the machine tool protection. The existing technology is to manually use a simple plug, manually insert it into the inner contour of the part before turning, and then manually remove it after turning. The plugging and removing operation process is cumbersome and time-consuming. Due to the manual operation, the resistance cannot be too large, so the cutting fluid and iron filings cannot be completely blocked. Manual operation plugging has a large installation position error, which is easy to cause loose plugging and leakage. The labor-saving manual operation and the tight plugging seal are contradictory, and it is difficult to meet them at the same time. The plugging plug material is easy to wear and has a short service life. If the existing machine tool protection is upgraded, the cost will increase too much and the effect is not ideal. Summary of the invention

[0003] The purpose of the present invention is to solve the problems in the prior art and to provide an automatic plugging system and method for turning the inner contour of long through holes, so as to solve the problem that the cutting fluid leaks along the inner wall due to poor plugging and sealing during the turning of long through hole parts.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] An automatic blocking system for turning the inner contour of a long through hole, comprising a numerical control unit, a blocking device and a turret;

[0006] The turret is connected to the numerical control unit, and the blocking device is installed on the turret. The blocking device includes a blocking body and a locking and releasing body. The blocking body is connected to the locking and releasing body. A plug is arranged in the blocking body, and a plurality of annular grooves are opened on the circumference of the outer surface of the plug.

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

[0008] Furthermore, the plugging body includes a clamping nut, a plug and a movable rod. A through hole is opened in the center of the plug, and the movable rod passes through the through hole and is threadedly fixedly connected to the clamping nut.

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

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

[0011] Furthermore, the locking and releasing body comprises a locking block and a locking cylinder, an inner hole is formed in the locking cylinder, and the locking block is installed in the inner hole of the locking cylinder.

[0012] Furthermore, a concave structure is provided in the locking cylinder, and a boss structure of the movable rod is installed in the concave structure of the locking cylinder.

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

[0014] Furthermore, the locking and releasing 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 blocking method for turning the inner contour of a long through hole of the system comprises:

[0016] The fixed 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 tandem to locate the processing zero position of the sample. The feeding action of the Z-axis inserts the plug into the inner contour of the sample. The plugging body is disconnected from the locking body, and the locking body is retracted to locate the zero position to start processing the inner contour of the sample.

[0017] After the processing is completed, the CNC unit controls the turret to quickly position through the program again, and the X-axis and Z-axis on the turret act in conjunction to remove the plug and move the plugging device to a safe position.

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

[0019] The present invention provides an automatic plugging system for turning the inner contour of a long through hole. The system utilizes the numerical control unit and turret of a numerically controlled lathe. Under the control of a numerically controlled program, the X-axis and Z-axis servo linkage on the turret causes the plugging device to automatically operate and plug into the inner contour of the sample piece to achieve automatic plugging. A number of annular grooves are provided on the circumference of the outer surface of the plug. The plug is designed with a reasonable interference fit. Under the action of friction and shear force, the uniqueness of the position in the inner contour of the plug can be ensured, and a tight seal and complete plugging can be achieved to achieve a good plugging effect. The present invention utilizes a numerically controlled lathe to achieve automatic plugging, and can be installed on all general numerically controlled lathes. The numerically controlled machine controls each action, and the installation position of the plug has high consistency, and efficient automatic operation can be achieved. No human participation is required for operation, no labor intensity, no operation risk, safety and efficiency, wide adaptability, and good promotion value.

[0020] Furthermore, the plug material 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 plug does not exceed 5%, and complete blocking can be achieved. Finally, a plug can be reused normally for 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 axis servos of the turret move in linkage, and the positioning accuracy of the blocking device reaches more than 0.01mm.

[0022] Furthermore, the fixed handle clamping part of the blocking device is a standard structure, which is easy to install and disassemble and is suitable for all general CNC lathes.

[0023] Furthermore, under the control of the CNC program, the plugging device has been subjected to more than 6,000 insertion and removal experiments, and the success rate of automatic insertion and removal can reach 100%. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

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

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

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

[0028] Figure 4 It is a schematic diagram of the lock and release 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-pressure nut, 7-plug, 8-movable rod, 9-locking block, 10-locking cylinder, 11-fixed handle, 12-spring, 13-adjusting nut. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

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

[0034] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which 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 is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0037] See also Figure 1 The present invention provides an automatic plugging system for turning the inner contour of a long through hole, comprising a CNC lathe 1, a CNC unit 3, a plugging device 4 and a turret 5. The plugging device 4 is mounted on the turret 5 by clamping a handle of a standard size, and the turret 5 is mounted on the CNC lathe 1. The turret 5 is connected to the CNC unit 3, the CNC unit 3 is mounted on the CNC lathe 1, and 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. A through hole is provided in the center of the plug 7. The plug 7 is inserted through the through hole in the center and installed on the left end of the movable rod 8, and is clamped to the boss structure in the middle of the movable rod 8 by the clamping nut 6. The movable rod 8 passes through the through hole and is threadedly fixedly connected with the clamping nut 6. The plug 7 is made of polyurethane rubber material, which has good wear resistance and a long service life. Several annular grooves are provided on the circumference of the outer surface of the plug 7 to achieve blocking. The plug is designed with a reasonable interference fit. Under the action of friction and shear force, the uniqueness of its position in the inner contour of the plug can be guaranteed, and a tight seal and complete blocking can be achieved, thereby achieving a good blocking effect. A boss structure is provided at the right end of the movable rod 8, which can realize the insertion and removal of the blocking body, and can be installed in the concave structure at 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. An inner hole is provided in the locking cylinder 10, and the locking block 9 is installed in the inner hole of the locking cylinder 10. The spring 12 and the adjusting nut 13 are also installed in the inner hole of the locking cylinder 10, and the locking block 9 is pressed into the inner hole of the locking cylinder 10 by the spring 12 and the adjusting nut 13. 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. The compression length of the spring 12 is adjusted by the thread of the adjusting nut 13 to overcome the friction of inserting and removing the plugging body and achieve the stability of the action. After the locking block 9, spring 12 and adjusting nut 13 are installed into the locking cylinder 10, one end of the fixed handle 11 is connected and fastened with the right end of the locking cylinder 10 through an external thread, and the other end of the fixed handle 11 is mounted on the turret 5 by clamping. The clamping part of the fixed handle 11 is a standard structure, which is easy to install and disassemble and is suitable for all general CNC lathes. The left end of the locking cylinder 10 is provided with a concave structure, and the boss structure of the movable rod 8 is installed in the concave structure of the locking cylinder 10. During the inner contour processing, the concave structure of the locking cylinder 10 can be disconnected from the boss structure of the movable rod 8, which facilitates the insertion and removal of the plugging body without affecting the processing of the inner contour.

[0040] The plugging device mainly realizes the functions of locking and releasing. The plug 7 is fixed to the movable rod 8 with a compression nut 6. This part can be put into the inner contour of the sample as a whole to achieve blocking. The plug 7 is made of polyurethane rubber, and multiple groups of annular grooves are processed on the outer surface to ensure the durability of the plug 7 under the action of friction and shear force. The locking block 9, spring 12 and adjustment nut 13 are installed in the locking cylinder 10. The compression length of the spring 12 is adjusted by adjusting the thread of the nut 13 to realize the functions of compression, insertion and removal.

[0041] The automatic blocking method for turning the inner contour of a long through hole of the present invention:

[0042] The fixed handle 11 of the plugging device 4 is clamped on the turret 5. Under the control of the numerical control unit 3, the X-axis and Z-axis of the turret 5 move, and quickly move to the processing zero position of the sample according to the numerical control 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, and the plug 7 is released through the mechanical structure combined with the X and Z axis movements. After the locking and releasing body quickly returns to the zero position, the machine tool performs the inner contour processing. After the inner contour processing is completed, the numerical control unit 3 controls the turret 5 to move quickly again. After the X-axis and Z-axis on the turret 5 are linked to take out the plug 7 from the inner contour of the sample, the plugging device 4 is quickly moved to the safe position of the machine tool.

[0043] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automatic blocking system for turning the inner contour of a long through hole, characterized in that: It comprises a numerical control unit (3), a blocking device (4) and a turret (5); The turret (5) is connected to the numerical control unit (3), and the blocking device (4) is installed on the turret (5). The blocking device (4) comprises a blocking body and a locking body. The blocking body is connected to the locking body. A plug (7) is arranged in the blocking body, and a plurality of annular grooves are provided on the circumference of the outer surface of the plug (7).

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

3. The automatic plugging system for turning the inner contour of a long through hole according to claim 1 is characterized in that: The plugging body comprises a clamping nut (6), a plug (7) and a movable rod (8); a through hole is provided at the center of the plug (7); the movable rod (8) passes through the through hole and is threadedly fixedly connected to the clamping nut (6).

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

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

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

7. The automatic plugging system for turning the inner contour of a long through hole according to claim 6, characterized in that: The locking cylinder (10) is provided with a concave structure in which a boss structure of a movable rod (8) is installed.

8. The automatic plugging system for turning the inner contour of a long through hole according to claim 1, characterized in that: The locking and releasing body further comprises a fixing handle (11), one end of which is fixedly connected to the locking cylinder (10) via a thread, and the other end of which is mounted on the turret (5) via clamping.

9. The automatic plugging system for turning the inner contour of a long through hole according to claim 1, characterized in that: The locking and releasing body further comprises a spring (12) and an adjusting nut (13), wherein 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).

10. An automatic blocking method for turning the inner contour of a long through hole of the system according to any one of claims 1 to 9, characterized in that: include: The fixed handle (11) of the plugging device (4) is clamped on the turret (5). Under the program control of the numerical control unit (3), the X-axis and Z-axis on the turret (5) move in conjunction with each other to locate the processing zero point of the sample. The feeding action of the Z-axis inserts the plug (7) into the inner contour of the sample. The plugging body is disconnected from the locking body, and the locking body is retracted to locate the zero point position to start processing the inner contour of the sample. After the processing is completed, the numerical control unit (3) controls the turret (5) to quickly position again through the program, and the X-axis and Z-axis on the turret (5) move in conjunction to remove the plug (7) and move the plugging device (4) to a safe position.

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