Workpiece rapid centering fixture for numerical control lathe

Abstract

The utility model relates to numerical control lathe technical field discloses a numerical control lathe workpiece quick centering fixture, including numerical control lathe body, the three -jaw chuck of being sleeved in numerical control lathe body inside, cooling liquid output mechanism, the inside installation of numerical control lathe body is equipped with the integrated cover of three -jaw chuck sleeve, the bottom of integrated cover is respectively sleeved with first half open hollow cylinder, second half open hollow cylinder, and the electromagnetic valve pipe is installed between the rear end of first half open hollow cylinder and cooling liquid output mechanism. The utility model discloses when the cooling liquid output mechanism transports the cooling liquid and carries out cooling and temperature reduction to the workpiece in machining, and the electromagnetic valve pipe that is arranged divides the partial cooling liquid that the cooling liquid output mechanism exports to the inside of first half open hollow cylinder, then enters the inside of second half open hollow cylinder and finally is obliquely sprayed to the surface of three -jaw chuck through multiple output holes, carries out synchronous cooling and temperature reduction to three -jaw chuck, and the problem existing in the prior art is solved.

Description

Technical Field

[0001] This utility model relates to the field of CNC lathe technology, specifically to a quick centering fixture for CNC lathe workpieces. Background Technology

[0002] The center fixtures used on modern CNC lathes typically refer to auxiliary devices used to position and support workpieces, ensuring machining accuracy and stability. For example, the three-jaw chuck commonly used in actual machining consists of a chuck body, movable jaws, and a jaw drive mechanism. The specific working principle is as follows: the underside of the guide parts of the three jaws on the three-jaw chuck has threads that mesh with the flat threads on the back of the disc bevel gear. When the small bevel gear is rotated through the square hole with a wrench, the disc gear rotates, and the flat threads on the back simultaneously drive the three jaws to move closer to or out of the center, thus clamping workpieces of different diameters. It has strong adaptability.

[0003] Currently, the self-aligning accuracy of three-jaw chucks is 0.05-0.15mm, which can meet the machining requirements of most workpieces. However, the machining accuracy of parts using three-jaw chucks is affected by the manufacturing accuracy of the chuck and the wear after use. Among these wear conditions, the most common and frequent is thermal wear caused by uneven heating and cooling. The reason for this is that the coolant output structure inside the CNC lathe is mostly directed towards the workpiece held by the three-jaw chuck and part of the jaws inside the chuck, which leads to a temperature difference in the internal structure of the jaws and reduces the structural performance. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a rapid centering fixture for CNC lathe workpieces, solving the problems mentioned in the background section.

[0005] This utility model provides the following technical solution: a CNC lathe workpiece quick centering fixture, including a CNC lathe body, a three-jaw chuck fitted inside the CNC lathe body, and a coolant output mechanism. The CNC lathe body has an integrated cover fitted with the three-jaw chuck inside. The bottom of the integrated cover has a first semi-open hollow cylinder and a second semi-open hollow cylinder respectively fitted inside. A solenoid valve tube is installed between the rear end of the first semi-open hollow cylinder and the coolant output mechanism. One end of the second semi-open hollow cylinder is fitted inside the first semi-open hollow cylinder, and the other end of the second semi-open hollow cylinder has an output hole communicating with its own space. The coolant output by the coolant output mechanism can be output towards the surface of the three-jaw chuck through the flow channel space formed by the internal space of the first semi-open hollow cylinder, the internal space of the second semi-open hollow cylinder, and the output hole.

[0006] Preferably, the number of output holes is not less than two and they are arranged along the circumference of the second semi-open hollow cylinder, and the open ports of the output holes are inclined toward the surface of the three-jaw chuck.

[0007] Preferably, sealing rings and bearings are nested and installed at the fitting points of the outer ring structure at one end of the second semi-open hollow cylinder and the inner wall of the outer ring structure at one end of the first semi-open hollow cylinder, as well as at the fitting points of the inner ring structure at one end of the second semi-open hollow cylinder and the inner wall of the inner ring structure at one end of the first semi-open hollow cylinder.

[0008] Preferably, the integrated cover has a linkage structure inside that can drive the second semi-open hollow cylinder. The linkage structure includes a first synchronous pulley, a synchronous belt, a second synchronous pulley, and a servo motor. The first synchronous pulley is fixedly mounted on the outside of the middle part of the second semi-open hollow cylinder. The top and bottom of the synchronous belt are respectively mounted on the outside of the first synchronous pulley and the outside of the second synchronous pulley. The middle part of the second synchronous pulley is connected to the output end of the servo motor. The outer side of the servo motor housing is mounted on a protective cover on the top surface of the integrated cover.

[0009] Preferably, there are clearance gaps between the surface of the synchronous belt and the inner wall of the integrated cover, and between the inner wall of the first synchronous pulley and the surface of the first semi-open hollow cylinder.

[0010] Preferably, an arc-shaped buffer pad is nested inside the middle of the integrated cover, and the surface of the arc-shaped buffer pad is movably connected to the surface of the second semi-open hollow cylinder.

[0011] Preferably, the bottom of the integrated cover, the first semi-open hollow cylinder, and the second semi-open hollow cylinder can all be movably connected to the three-jaw chuck, and the top and bottom of the integrated cover are provided with clearance holes. The inner wall of the CNC lathe body is provided with screw holes that can be aligned with the clearance holes, and the integrated cover and the CNC lathe body can be detachably installed by means of screws fitting into the clearance holes and then threadedly connected to the screw holes.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. This utility model forms a circulating auxiliary structure through a first semi-open hollow cylinder, a second semi-open hollow cylinder, multiple output holes, and a solenoid valve tube. Subsequently, while the coolant output mechanism delivers coolant to cool the workpiece being processed, the solenoid valve tube diverts a portion of the coolant output from the coolant output mechanism into the interior of the first semi-open hollow cylinder, then into the interior of the second semi-open hollow cylinder, and finally sprays it obliquely onto the surface of the three-jaw chuck through multiple output holes, thus synchronously cooling the three-jaw chuck. This avoids the phenomenon of uneven heating and cooling of the jaws inside the three-jaw chuck due to the heat transferred from the workpiece being cut, and solves the problems existing in the prior art.

[0014] 2. By further combining the linkage structure and the circulating auxiliary structure, the servo motor in the circulating auxiliary structure drives the synchronous belt assembly formed by the first synchronous pulley, the synchronous belt and the second synchronous pulley. At the same time, the second semi-open hollow cylinder will rotate synchronously with the first synchronous pulley, so that the multiple output holes will spray and cover the three-jaw chuck in a reciprocating rotation manner, further improving the uniformity of cooling of the three-jaw chuck.

[0015] 3. By setting an integrated cover as a unified support and installation platform, this utility model ensures the stability of multiple structures such as the first semi-open hollow cylinder and the second semi-open hollow cylinder. At the same time, the integrated cover and the CNC lathe body can be detachably installed by screws, which improves the flexibility of the overall device in specific use or installation and optimizes the overall device's performance. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of the three-jaw chuck structure of this utility model;

[0017] Figure 2 This is a front view schematic diagram of the three-jaw chuck structure of this utility model;

[0018] Figure 3 This is an enlarged schematic diagram of the three-jaw chuck structure of this utility model;

[0019] Figure 4 This is a cross-sectional schematic diagram of the first semi-open hollow cylinder of the present invention.

[0020] Figure 5 The structure of this utility model Figure 4 Enlarged view of point A in the middle;

[0021] Figure 6 This is a right-side view of the integrated cover structure of this utility model.

[0022] In the diagram: 1. CNC lathe body; 2. Three-jaw chuck; 3. Coolant output mechanism; 4. Integrated cover; 5. First semi-open hollow cylinder; 6. Second semi-open hollow cylinder; 7. Output hole; 8. First synchronous pulley; 9. Synchronous belt; 10. Second synchronous pulley; 11. Servo motor; 12. Sealing ring; 13. Bearing; 14. Solenoid valve tube. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1-5 A CNC lathe workpiece quick centering fixture includes a CNC lathe body 1, a three-jaw chuck 2 fitted inside the CNC lathe body 1, and a coolant output mechanism 3. An integrated cover 4 fitted inside the CNC lathe body 1 and the three-jaw chuck 2 is installed. A first semi-open hollow cylinder 5 and a second semi-open hollow cylinder 6 are respectively fitted inside the bottom of the integrated cover 4. A solenoid valve tube 14 is installed between the rear end of the first semi-open hollow cylinder 5 and the coolant output mechanism 3. One end of the second semi-open hollow cylinder 6 is fitted inside the first semi-open hollow cylinder 5, and the other end of the second semi-open hollow cylinder 6 has an output hole 7 communicating with its own space. The coolant output by the coolant output mechanism 3 can be output towards the surface of the three-jaw chuck 2 through the flow channel space formed by the internal space of the first semi-open hollow cylinder 5, the internal space of the second semi-open hollow cylinder 6, and the output hole 7.

[0025] Sealing rings 12 and bearings 13 are nested at the fitting points of the outer ring structure at one end of the second semi-open hollow cylinder 6 and the inner wall of the outer ring structure at one end of the first semi-open hollow cylinder 5, as well as at the fitting points of the inner ring structure at one end of the second semi-open hollow cylinder 6 and the inner wall of the inner ring structure at one end of the first semi-open hollow cylinder 5. This ensures the fitting connection strength between the first semi-open hollow cylinder 5 and the second semi-open hollow cylinder 6.

[0026] The number of output holes 7 is no less than two and they are arranged along the circumference of the second semi-open hollow cylinder 6 to ensure the uniform cooling effect of the subsequent spraying of the three-jaw chuck 2, further reducing the probability of temperature difference inside the three-jaw chuck 2. The open port of the output hole 7 is in an inclined state towards the surface of the three-jaw chuck 2, thereby increasing the area of ​​the coolant spraying the three-jaw chuck 2.

[0027] In use, the three-jaw chuck 2 clamps the workpiece and performs CNC machining in conjunction with the internal cutting mechanism of the CNC lathe body 1. The coolant output mechanism 3 automatically delivers coolant to the surface of the workpiece to be machined, cooling and lubricating the workpiece under cutting conditions. At the same time, the solenoid valve inside the second synchronous pulley 10 is opened, and part of the coolant output by the coolant output mechanism 3 is diverted to the inside of the first semi-open hollow cylinder 5 through the solenoid valve tube 14. Then, the coolant enters the inside of the second semi-open hollow cylinder 6 through the first semi-open hollow cylinder 5 and is then sprayed obliquely onto the surface of the three-jaw chuck 2 through multiple output holes 7, synchronously cooling the three-jaw chuck 2. This prevents the jaws inside the three-jaw chuck 2 from experiencing uneven heating due to the heat transferred from the workpiece being cut, thus maintaining the accuracy of the three-jaw chuck 2 during continuous clamping.

[0028] Please see Figures 1-6 The integrated cover 4 has a linkage structure inside that can drive the second semi-open hollow cylinder 6. The linkage structure includes a first synchronous pulley 8, a synchronous belt 9, a second synchronous pulley 10, and a servo motor 11. The first synchronous pulley 8 is fixedly mounted on the outside of the middle part of the second semi-open hollow cylinder 6. The top and bottom of the synchronous belt 9 are respectively mounted on the outside of the first synchronous pulley 8 and the outside of the second synchronous pulley 10. The middle part of the second synchronous pulley 10 is connected to the output end of the servo motor 11. The outer side of the housing of the servo motor 11 is mounted on a protective cover on the top surface of the integrated cover 4.

[0029] There are clearance gaps between the surface of the synchronous belt 9 and the inner wall of the integrated cover 4, and between the inner wall of the first synchronous pulley 8 and the surface of the first semi-open hollow cylinder 5, to avoid structural interference. An arc-shaped buffer pad is nested on the inner side of the middle part of the integrated cover 4, and the surface of the arc-shaped buffer pad is movably connected to the surface of the second semi-open hollow cylinder 6 to reduce friction and prevent the integrated cover 4 from scratching the rotating second semi-open hollow cylinder 6.

[0030] During use, in order to further improve the uniformity of the cooling effect of the coolant on the three-jaw chuck 2, the servo motor 11 can be started during the process of supplying coolant through the output hole 7 inside the second semi-open hollow cylinder 6. The output end of the servo motor 11 drives the second synchronous wheel 10 to rotate synchronously. The rotated second synchronous wheel 10 will drive the first synchronous wheel 8 and the second semi-open hollow cylinder 6 to rotate synchronously through the synchronous belt 9, so that the multiple output holes 7 can spray and cover the three-jaw chuck 2 in a reciprocating rotation manner, further improving the uniformity of the cooling effect on the three-jaw chuck 2.

[0031] Please see Figures 1-6The bottom of the integrated cover 4, the first semi-open hollow cylinder 5, and the second semi-open hollow cylinder 6 can all be movably connected to the three-jaw chuck 2. The top and bottom of the integrated cover 4 are provided with clearance holes. The inner wall of the CNC lathe body 1 is provided with screw holes that can be aligned with the clearance holes. The integrated cover 4 and the CNC lathe body 1 can be detachably installed by means of screws and clearance holes fitted together and then threadedly connected to the screw holes.

[0032] In use, by installing or removing the screws between the integrated cover 4 and the CNC lathe body 1, the integrated cover 4 and the structure associated with the integrated cover 4 can be assembled with or separated from the three-jaw chuck 2 for maintenance, increasing the flexibility of the overall device in specific use.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Additionally, in the accompanying drawings of this utility model, the fill patterns are merely for distinguishing layers and do not constitute any other limitation.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A quick centering fixture for a CNC lathe workpiece, comprising a CNC lathe body (1), a three-jaw chuck (2) fitted inside the CNC lathe body (1), and a coolant output mechanism (3), characterized in that: The CNC lathe body (1) is equipped with an integrated cover (4) that is fitted with a three-jaw chuck (2). The bottom of the integrated cover (4) is fitted with a first semi-open hollow cylinder (5) and a second semi-open hollow cylinder (6). A solenoid valve tube (14) is installed between the rear end of the first semi-open hollow cylinder (5) and the coolant output mechanism (3). One end of the second semi-open hollow cylinder (6) is fitted inside the first semi-open hollow cylinder (5), and the other end of the second semi-open hollow cylinder (6) is provided with an output hole (7) that communicates with its own space. The coolant output by the coolant output mechanism (3) can be output to the surface of the three-jaw chuck (2) through the flow channel space formed by the internal space of the first semi-open hollow cylinder (5), the internal space of the second semi-open hollow cylinder (6), and the output hole (7).

2. The CNC lathe workpiece rapid centering fixture according to claim 1, characterized in that: The number of output holes (7) is not less than two and they are arranged along the circumference of the second semi-open hollow cylinder (6), and the open port of the output hole (7) is in an inclined state toward the surface of the three-jaw chuck (2).

3. A quick centering fixture for CNC lathe workpieces according to claim 1, characterized in that: Sealing rings (12) and bearings (13) are nested at the fitting points between the outer ring structure at one end of the second semi-open hollow cylinder (6) and the inner wall of the outer ring structure at one end of the first semi-open hollow cylinder (5), and at the fitting points between the inner ring structure at one end of the second semi-open hollow cylinder (6) and the inner wall of the inner ring structure at one end of the first semi-open hollow cylinder (5).

4. A quick centering fixture for CNC lathe workpieces according to claim 1, characterized in that: The integrated cover (4) is internally fitted with a linkage structure that can drive the second semi-open hollow cylinder (6). The linkage structure includes a first synchronous pulley (8), a synchronous belt (9), a second synchronous pulley (10), and a servo motor (11). The first synchronous pulley (8) is fixedly fitted on the outside of the middle part of the second semi-open hollow cylinder (6). The top and bottom of the synchronous belt (9) are respectively fitted on the outside of the first synchronous pulley (8) and the outside of the second synchronous pulley (10). The middle part of the second synchronous pulley (10) is connected to the output end of the servo motor (11). The outer side of the housing of the servo motor (11) is fitted with a protective cover on the top surface of the integrated cover (4).

5. A quick centering fixture for CNC lathe workpieces according to claim 4, characterized in that: There are clearance gaps between the surface of the synchronous belt (9) and the inner wall of the integrated cover (4), and between the inner wall of the first synchronous wheel (8) and the surface of the first semi-open hollow cylinder (5).

6. A quick centering fixture for CNC lathe workpieces according to claim 1, characterized in that: An arc-shaped buffer pad is nested inside the middle of the integrated cover (4), and the surface of the arc-shaped buffer pad is movably connected to the surface of the second semi-open hollow cylinder (6).

7. A rapid centering fixture for CNC lathe workpieces according to claim 1, characterized in that: The bottom of the integrated cover (4), the first semi-open hollow cylinder (5) and the second semi-open hollow cylinder (6) can all be movably connected to the three-jaw chuck (2), and the top and bottom of the integrated cover (4) are provided with clearance holes. The inner wall of the CNC lathe body (1) is provided with screw holes that can be aligned with the clearance holes. The integrated cover (4) and the CNC lathe body (1) can be detachably installed by means of screws fitting into the clearance holes and then threadedly connected to the screw holes.

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