Real-time accurate balance mechanism of numerical control cradle rotary table

Abstract

The invention discloses a real-time precise balance mechanism of a numerical control cradle rotary table, which comprises a base, the base is rotatably connected with the cradle rotary table, the end part of a rotating shaft of the cradle rotary table is fixedly provided with a connecting plate, the base is detachably provided with a track close to the connecting plate, the track is slidably connected with a telescopic piece, and the telescopic piece is fixedly connected with the rotating shaft of the cradle rotary table. The output end of the telescopic piece is rotationally connected with the connecting plate, a control valve is further arranged on the base, and the control valve is electrically connected with the telescopic piece and the system control end. When the balancing mechanism is used, the balancing mechanism can change along with the change of the gravity center of the rotating part of the rotary table, the cutting force and the weight of a machined workpiece, and the torque borne by the rotating part of the numerical control cradle rotary table is accurately balanced in real time. When the device is used, the expansibility is high, the precision of the numerical control cradle rotary table can be improved or the bearing capacity of the numerical control cradle rotary table can be improved by replacing configurations, and effective technical support is provided for the numerical control cradle rotary table in the aspect of product serialization type spectrum expansion.

Description

Technical Field

[0001] The invention relates to the technical field of machine tool equipment, and in particular to a real-time precise balancing mechanism of a numerically controlled cradle turntable. Background Art

[0002] At present, the rotating balancing mechanism of the CNC cradle turntable can only achieve balance compensation within a certain range. As the chip force of the workpiece being processed on the CNC turntable and the weight of the workpiece after processing change, the balancing torque cannot be adjusted in a timely and effective manner, making it difficult to achieve real-time and accurate compensation. Summary of the invention

[0003] The purpose of the present invention is to solve the problem in the prior art that various types of rotating balancing mechanisms equipped with cradle turntables can only achieve balance compensation within a certain range. As the chip force of the workpiece being processed by the CNC turntable and the weight of the workpiece after processing change, timely and effective balancing torque adjustment cannot be made, making it difficult to truly achieve real-time and accurate compensation. A real-time and precise balancing mechanism for a CNC cradle turntable is proposed.

[0004] The purpose of the present invention can be achieved through the following technical solutions:

[0005] A real-time precise balancing mechanism for a numerically controlled cradle turntable comprises a base, the base is rotatably connected to a cradle turntable, a connecting plate is fixed to the end of a rotating shaft of the cradle turntable, a track is detachably mounted on the base near the connecting plate, a telescopic member is slidably connected to the track, an output end of the telescopic member is rotatably connected to the connecting plate, a control valve is further arranged on the base, and the control valve is electrically connected to the telescopic member and a system control end, respectively.

[0006] As a further solution of the present invention: frames are detachably mounted on both sides of the top of the base, and the cradle turntable rotates between the two frames via rotating shafts at both ends.

[0007] As a further solution of the present invention: the connecting plate is circular.

[0008] As a further solution of the present invention: a connecting shaft is installed on the connecting plate, and the telescopic member is rotatably connected to the connecting plate through the connecting shaft.

[0009] As a further solution of the present invention: a mounting seat is arranged between the telescopic member and the guide rail, the mounting seat can slide on the guide rail, and the telescopic member is connected to the mounting seat.

[0010] As a further solution of the present invention: the telescopic member is a balancing cylinder.

[0011] As a further solution of the present invention: the guide rail is a linear rail slider.

[0012] As a further solution of the present invention: the control valve is an electric proportional valve.

[0013] Beneficial effects of the present invention: When the present application is in use, the balancing mechanism can follow the changes in the center of gravity of the rotating part of the turntable, the chip force, and the weight of the workpiece after processing, and accurately balance the torque on the rotating part of the CNC cradle turntable in real time. When the present application is in use, it has strong scalability, and the accuracy of the CNC cradle turntable can be improved or the load-bearing capacity can be increased by replacing the configuration, providing effective technical support for the expansion of the product series spectrum of the CNC cradle turntable. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below in conjunction with the accompanying drawings.

[0015] Figure 1 It is a schematic diagram of the structure of the present invention;

[0016] Figure 2 is a side view of the present invention;

[0017] Figure 3 It is a rear view of the present invention.

[0018] Figure 4 It is a schematic diagram of the theoretical calculation of the present invention.

[0019] Figure 5 yes Figure 4 Enlarged image of .

[0020] In the figure: 1. cradle turntable; 2. connecting plate; 3. connecting shaft; 4. balancing cylinder; 5. electric proportional valve; 6. mounting seat; 7. linear rail slider; 8. base; 9. frame. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0022] T represents the real-time torque value of the A-axis motor of the cradle turntable;

[0023] F represents the balancing thrust value of the balancing cylinder or oil cylinder;

[0024] l represents the distance between the center of the connecting shaft and the rotation center of the A axis;

[0025] Φ represents the phase angle between the A-axis of the cradle turntable and the vertical direction.

[0026] See also Figure 1-5As shown, the present invention is a real-time precise balancing mechanism of a CNC cradle turntable, comprising a base 8, a cradle turntable 1 is rotatably connected to the base 8, a connecting plate 2 is fixed to the end of the rotating shaft of the cradle turntable 1, a track is detachably installed on the base 8 near the connecting plate 2, a telescopic member is slidably connected to the track, the output end of the telescopic member is rotatably connected to the connecting plate, a control valve is also arranged on the base 8, and the control valve is electrically connected to the telescopic member and the system control end respectively.

[0027] Frames 9 are detachably mounted on both sides of the top of the base 8 , and the cradle turntable 1 rotates between the two frames 9 via rotating shafts at both ends.

[0028] The connecting plate 2 is circular.

[0029] A connecting shaft 3 is installed on the connecting plate 2, and the telescopic member is rotatably connected to the connecting plate 2 via the connecting shaft 3.

[0030] A mounting seat 6 is provided between the telescopic member and the guide rail. The mounting seat 6 can slide on the guide rail, and the telescopic member is connected to the mounting seat 6 .

[0031] The telescopic member is a balancing cylinder 4.

[0032] The guide rail is a linear rail slider 7.

[0033] The control valve is an electric proportional valve 5.

[0034] The connecting plate 2 is fixedly connected to the outer circumference of the end of the rotating shaft of the cradle turntable 1. A lower connecting shaft 3 is provided on the connecting plate 2. The extended end of the piston rod of the balancing cylinder 4 or the oil cylinder is coaxially matched with the upper connecting shaft 3 through a bearing. The connecting shaft 3 is connected to the connecting plate 2 through a bearing, a spacer, and a locking nut. The lower end mounting seat 6 of the balancing cylinder 4 or the oil cylinder is connected to the linear rail slider 7. The electrical proportional valve 5 or the proportional servo valve is respectively connected to the balancing cylinder 4 and the system control end. This structure can well realize the extended end of the piston rod of the balancing cylinder 4 or the oil cylinder and the cradle turntable. The cradle turntable 1A axis rotates and moves in the same trajectory. The real-time torque value of the cradle turntable 1A axis driving motor can be read by the system in real time detection, and the phase angle Φ can be identified by the angle encoder. The real-time torque value of the cradle turntable 1A axis driving motor can be converted into the thrust of the balancing cylinder 4 or the extended end of the cylinder piston rod, that is, the balancing force value, through the algorithm. The thrust that needs to be output, that is, the balancing force value, is accurately provided to the balancing cylinder 4 or the extended end of the cylinder piston rod through the electrical proportional valve 5 or the proportional servo valve, thereby realizing real-time and precise balancing of the CNC cradle turntable 1.

[0035] The present invention can accurately balance the load moment of the rotating axis of the CNC cradle turntable 1 in real time, improve the dynamics and rotation accuracy of the CNC cradle turntable 1, while improving the bearing capacity and service life of the CNC cradle turntable 1 and improving the surface finish of the processed parts.

[0036] The present invention simply and effectively solves the problem of real-time trajectory tracking of the numerical control cradle turntable 1 rotating around the A axis.

[0037] The extended end of the piston rod of the balancing cylinder 4 or the oil cylinder is coaxially matched with the upper connecting shaft 3 through a bearing, and the connecting shaft 3 is connected to the connecting plate 2 through a bearing, a spacer, and a locking nut. The connecting plate 2 is fixedly connected to the outer circumference of the end of the rotating shaft of the cradle turntable 1. The lower end mounting seat 6 of the balancing cylinder 4 or the oil cylinder is connected to the linear rail slider 7. This structure realizes horizontal movement through the vertical movement of the piston rod of the balancing cylinder 4 and the balancing cylinder 4 as a whole through the linear rail slider 7. Under the coupling of vertical and horizontal movements, the extended end of the piston rod of the balancing cylinder 4 or the oil cylinder can well realize the rotation of the cradle turntable 1A axis and the same track movement. This structure can accurately and effectively balance the cradle turntable 1A axis.

[0038] The present invention simply and effectively solves the difficult problem of real-time and accurate compensation of the rotation of the numerically controlled cradle turntable 1 around the A-axis.

[0039] The extended end of the piston rod of the balancing cylinder 4 or the oil cylinder rotates with the cradle turntable 1A axis and moves in the same trajectory. The real-time torque value of the cradle turntable 1A axis drive motor can be read by real-time detection of the system, and the phase angle Φ can be identified by the angle encoder. The real-time torque value of the cradle turntable 1A axis drive motor can be converted into the thrust of the extended end of the balancing cylinder 4 or the oil cylinder piston rod, that is, the balancing force value, through the algorithm. The thrust that needs to be output, that is, the balancing force value, is accurately provided to the extended end of the balancing cylinder 4 or the oil cylinder piston rod through the electrical proportional valve 5 or the proportional servo valve, thereby realizing the real-time and accurate balance of the CNC cradle turntable 1. In addition, the dynamics and rotation accuracy of the cradle turntable 1A axis are improved, and the present invention can effectively provide strong technical support for the research and development of high-precision machine tools.

[0040] The present invention has strong expansibility. If the accuracy of the CNC cradle turntable 1 is to be improved, a higher-precision encoder and an electric proportional valve 5 or a proportional servo valve can be selected to achieve a high balancing accuracy; if the load-bearing capacity of the CNC cradle turntable 1 is to be improved, a hydraulic cylinder with a larger diameter can be selected to replace the balancing cylinder 4 to obtain a larger balancing torque. The present invention can effectively improve the accuracy level of the CNC cradle turntable 1 or greatly improve its load-bearing capacity, providing effective technical support for the expansion of the CNC cradle turntable 1 series product spectrum in terms of accuracy and load-bearing.

[0041] It is also worth adding that:

[0042] The extended end of the piston rod of the balancing cylinder 4 or the oil cylinder is coaxially matched with the upper connecting shaft 3 through a bearing. The connecting shaft 3 is connected to the connecting plate 2 through a bearing, a spacer sleeve, and a locking nut. The connecting plate 2 is fixedly connected to the outer circumference of the end of the rotating shaft of the cradle turntable 1. The lower end mounting seat 6 of the balancing cylinder 4 or the oil cylinder is connected to the linear rail slider 7. This structure realizes horizontal movement through the vertical movement of the piston rod of the balancing cylinder 4 and the overall horizontal movement of the balancing cylinder 4 through the linear rail slider 7. Under the coupling of vertical and horizontal movements, the extended end of the piston rod of the balancing cylinder 4 or the oil cylinder can well realize the rotation of the A axis of the cradle turntable 1 and perform co-trajectory movement.

[0043] When in use, the real-time torque value of the cradle turntable 1A axis driving motor can be read through real-time detection by the system, and the phase angle Φ can be identified by the angle encoder. The real-time torque value of the cradle turntable 1A axis driving motor can be converted into the thrust, i.e., the balancing force value, of the balancing cylinder 4 or the extended end of the oil cylinder piston rod through the algorithm. The thrust, i.e., the balancing force value to be output can be accurately provided to the balancing cylinder 4 or the extended end of the oil cylinder piston rod through the electrical proportional valve 5 or the proportional servo valve, thereby realizing real-time and precise balancing of the CNC cradle turntable 1.

[0044] Specifically, the outer circumference of the end of the rotating shaft of the cradle turntable 1 is fixedly connected to the connecting plate 2, and a lower connecting shaft 3 is provided on the connecting plate 2. The protruding end of the piston rod of the balancing cylinder 4 or the oil cylinder is coaxially matched with the upper connecting shaft 3 through a bearing. The connecting shaft 3 is connected to the connecting plate 2 through a bearing, a spacer and a locking nut. The lower end mounting seat 6 of the balancing cylinder 4 or the oil cylinder is connected to the linear rail slider 7. The vertical movement of the piston rod of the balancing cylinder 4 and the horizontal movement of the balancing cylinder 4 as a whole are realized through the linear rail slider 7. Under the coupling of vertical and horizontal movements, the protruding end of the piston rod of the balancing cylinder 4 or the oil cylinder can well realize the rotation of the axis A of the cradle turntable 1 and perform the same trajectory movement. The electrical proportional valve 5 or the proportional servo valve is respectively connected to the balancing cylinder 4 and the system control end. The real-time torque value T of the A-axis driving motor of the cradle turntable 1 can be read through real-time detection by the system, and the phase angle Φ can be identified by the angle encoder. The real-time torque value T of the A-axis driving motor of the cradle turntable 1 can be converted into the thrust of the balancing cylinder 4 or the extended end of the oil cylinder piston rod, that is, the balancing force value F, through algorithms such as T=F lsi nΦ. The thrust that needs to be output, that is, the balancing force value F, is accurately provided to the balancing cylinder 4 or the extended end of the oil cylinder piston rod through the electrical proportional valve 5 or the proportional servo valve, thereby realizing real-time and precise balancing of the CNC cradle turntable 1.

[0045] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the claims of the present invention.

Claims

1. A real-time precision balancing mechanism for a numerically controlled cradle turntable, comprising a base (8), characterized in that: The base (8) is rotatably connected to a cradle turntable (1), a connecting plate (2) is fixed to the end of the rotating shaft of the cradle turntable (1), a track is detachably installed on the base (8) near the connecting plate (2), a telescopic member is slidably connected to the track, an output end of the telescopic member is rotatably connected to the connecting plate, and a control valve is also arranged on the base (8), and the control valve is electrically connected to the telescopic member and the system control end respectively.

2. The real-time precise balancing mechanism of a numerically controlled cradle turntable according to claim 1 is characterized in that: Frames (9) are detachably mounted on both sides of the top of the base (8), and the cradle turntable (1) rotates between the two frames (9) via rotating shafts at both ends.

3. The real-time precise balancing mechanism of a numerically controlled cradle turntable according to claim 1 is characterized in that: The connecting plate (2) is circular.

4. The real-time accurate balancing mechanism of a numerically controlled cradle turntable according to claim 3 is characterized in that: A connecting shaft (3) is mounted on the connecting plate (2), and the telescopic member is rotatably connected to the connecting plate (2) via the connecting shaft (3).

5. The real-time precise balancing mechanism of a numerically controlled cradle turntable according to claim 1 is characterized in that: A mounting seat (6) is provided between the telescopic member and the guide rail; the mounting seat (6) can slide on the guide rail; and the telescopic member is connected to the mounting seat (6).

6. The real-time accurate balancing mechanism of a numerically controlled cradle turntable according to claim 1, characterized in that: The telescopic member is a balancing cylinder (4).

7. The real-time accurate balancing mechanism of a numerically controlled cradle turntable according to claim 1 is characterized in that: The guide rail is a linear rail slider (7).

8. The real-time accurate balancing mechanism of a numerically controlled cradle turntable according to claim 1 is characterized in that: The control valve is an electric proportional valve (5).

9. The real-time accurate balancing mechanism of a numerically controlled cradle turntable according to claim 1, characterized in that: The connecting shaft (3) is an eccentric shaft.

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