CN209077809U - A kind of five degree of freedom fast servo tool micromotion platform - Google Patents

Abstract

The utility model discloses a five-degree-of-freedom fast servo tool rest micro-movement platform, which is characterized in that it comprises a base, a tool rest and a tool mounting platform. The base is provided with a first driving mechanism for rotating the tool rest around an X axis and a The second driving mechanism for the tool holder to rotate around the Y axis. The tool holder is fixedly provided with an X-direction piezoelectric ceramic driver, a first Y-direction piezoelectric ceramic driver and a second Y-direction piezoelectric ceramic driver. The X-direction piezoelectric ceramic driver and the An X-direction displacement amplifying hinge is arranged between the tool mounting platforms, a first Y-direction displacement amplifying hinge is arranged between the first Y-direction piezoelectric ceramic driver and the tool mounting platform, and the second Y-direction piezoelectric ceramic driver is connected to the tool mounting platform. A second Y-direction displacement amplification hinge is arranged between the two parts; the advantage is that when the micro-moving platform is installed on the guide rail in the Z-direction of the machine tool, the movement of the tool with 6 degrees of freedom can be realized, and the parts only need to be installed on the three-jaw chuck. By rotating up, the machining of complex surface parts can be completed, which improves the machining efficiency.

Description

A five-degree-of-freedom fast servo tool rest micro-movement platform

technical field

The utility model relates to a micro-moving platform, in particular to a five-degree-of-freedom fast servo tool rest micro-moving platform.

Background technique

In recent years, complex curved parts with non-circular cross-section and non-axisymmetric structure have been widely used in the optical field. The traditional processing methods of these parts generally adopt the imitation method, electrochemical corrosion method, grinding and polishing method, etc., but the processing efficiency And the processing accuracy is low, it is difficult to meet the production requirements.

Nowadays, CNC machining technology is used to process parts. Generally, the machining method of separating the tool and the part is adopted. The tool moves in the three directions of X, Y and Z with the machine tool, and the part rotates around the X direction on the three-jaw chuck. During the process, the X-axis or Y-axis tool needs to be fed back and forth once, especially when processing large parts, the feed stroke is long, resulting in low processing efficiency of the parts, and it is difficult to guarantee the processing accuracy. And when machining complex parts, due to the lack of freedom of the machine tool itself, it is often necessary to process complex curved surfaces with multi-axis linkage. The existing solution is that a servo motor and a transmission system control the motion of one degree of freedom, and realize a curved surface with 6 degrees of freedom. For processing, six servo motors and transmission systems are required, which leads to high machine tool development and manufacturing costs.

SUMMARY OF THE INVENTION

The technical problem to be solved by the utility model is to provide a five-degree-of-freedom fast servo tool rest micro-movement platform which can improve the machining efficiency of complex curved parts and reduce the manufacturing cost of the machine tool.

The technical solution adopted by the utility model to solve the above technical problems is as follows: a five-degree-of-freedom fast servo tool rest micro-moving platform, comprising a base, a tool rest and a tool mounting platform for installing tools, and the base is provided with There are a first driving mechanism for rotating the tool holder around the X axis and a second driving mechanism for rotating the tool holder around the Y axis, and the X-direction piezoelectric ceramic driver, the first A Y-direction piezoelectric ceramic driver and a second Y-direction piezoelectric ceramic driver, the tool mounting platform is arranged in the tool holder, and the X-direction piezoelectric ceramic driver and the tool mounting platform are located between An X-direction displacement amplification hinge is provided, the first Y-direction piezoelectric ceramic driver and the second Y-direction piezoelectric ceramic driver are staggered in the Y-direction, and the first Y-direction piezoelectric ceramic driver A first Y-direction displacement amplifying hinge is arranged between the tool mounting platform and the second Y-direction piezoelectric ceramic driver and a second Y-direction displacement amplifying hinge is arranged between the second Y-direction piezoelectric ceramic driver and the tool mounting platform.

Further, the first drive mechanism includes a first servo motor, a first X-direction hydraulic cylinder and a second X-direction hydraulic cylinder, the first X-direction hydraulic cylinder and the second X-direction hydraulic cylinder are respectively It is fixedly installed on the opposite sides of the base, and the end of the piston rod of the first X-direction hydraulic cylinder is fixedly provided with a first connecting rod, and the first connecting rod is connected to the first servo The motor is fixedly connected, the first servo motor and the base are slidably matched along the X direction, a first spline is fixed coaxially on the drive shaft of the first servo motor, and the tool holder faces One side of the first servo motor is provided with a first spline hole for matching with the first spline, and the side of the tool holder facing the second X-direction hydraulic cylinder is provided with a first spline hole. The X-direction positioning hole, the piston rod of the second X-direction hydraulic cylinder extends into the X-direction positioning hole.

Further, the second driving mechanism includes a second servo motor, a first Y-direction hydraulic cylinder and a second Y-direction hydraulic cylinder, the first Y-direction hydraulic cylinder and the second Y-direction hydraulic cylinder are respectively It is fixedly installed on the opposite sides of the base, and the end of the piston rod of the first Y-direction hydraulic cylinder is fixedly provided with a second connecting rod, and the second connecting rod is connected to the second servo The motor is fixedly connected, the second servo motor and the base are slidably matched along the Y direction, a second spline is fixed coaxially on the drive shaft of the second servo motor, and the tool holder faces One side of the second servo motor is provided with a second spline hole for matching with the second spline, and the side of the tool holder facing the second Y-direction hydraulic cylinder is provided with a second spline hole. The Y-direction positioning hole, the piston rod of the second Y-direction hydraulic cylinder extends into the Y-direction positioning hole.

Further, the X-direction displacement magnifying hinge includes a first U-shaped connecting arm, and both ends of the first U-shaped connecting arm are integrally connected with the tool rest through flexible hinges, and the first U-shaped connecting arm is integrally connected to the tool holder. The inner arm of the connecting arm is integrally connected with the tool mounting platform through a flexible hinge, and the X-direction piezoelectric ceramic driver abuts on the outer arm of the first U-shaped connecting arm.

Further, the first Y-direction displacement amplifying hinge includes a second U-shaped connecting arm and a straight arm, the first Y-direction piezoelectric ceramic driver abuts on the straight arm, and the straight arm is One end of the second U-shaped connecting arm is perpendicular and integrally connected with the outer arm of the second U-shaped connecting arm, and the outer arm of the second U-shaped connecting arm is integrally connected with the tool holder through a flexible hinge. The inner arm of the U-shaped connecting arm is integrally connected with the tool mounting platform through a flexible hinge.

Further, the second Y-direction displacement amplifying hinge includes a third U-shaped connecting arm, and the inner arm of the third U-shaped connecting arm is integrally connected with the tool mounting platform through a flexible hinge, and the third U-shaped connecting arm is integrally connected to the tool mounting platform. The two Y-direction piezoelectric ceramic drivers abut on the outer arm of the third U-shaped connecting arm, and the open end of the third U-shaped connecting arm is integrally connected with the tool holder through a flexible hinge.

Compared with the prior art, the advantage of the present utility model is that the tool holder micro-moving platform itself can realize the tool movement in the direction of 5 degrees of freedom, including the movement along the X, Y directions and the rotation around the X, Y, and Z directions, When the micro-moving platform is installed on the guide rail in the Z direction of the machine tool, the movement of the tool in 6 degrees of freedom can be realized, so as to realize the 6-degree-of-freedom machining of the parts, and the parts only need to be installed on the three-jaw chuck of the machine tool. It can complete the processing of complex curved parts in all directions, and improve the processing efficiency; and the entire tool post micro-moving platform has a simple structure, requiring fewer servo motors and transmission components, on the premise of ensuring the machining accuracy of the parts. The manufacturing cost and operating cost of the machine tool are reduced.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the present utility model;

Fig. 2 is the connection schematic diagram of the first servo motor of the present invention and the first X-direction hydraulic cylinder;

FIG. 3 is a schematic diagram of the connection between the tool holder and the tool installation platform of the present invention.

Detailed ways

The present utility model will be further described in detail below with reference to the embodiments of the accompanying drawings.

As shown in the figure, a five-degree-of-freedom fast servo tool rest micro-moving platform includes a base 1, a tool rest 2 and a tool mounting platform 3 for installing a tool 100. The first driving mechanism for axis rotation and the second driving mechanism for rotating the tool holder 2 around the Y axis. The first driving mechanism includes a first servo motor 4, a first X-direction hydraulic cylinder 5 and a second X-direction hydraulic cylinder 6. An X-direction hydraulic cylinder 5 and a second X-direction hydraulic cylinder 6 are fixedly installed on opposite sides of the base 1, respectively. The end of the piston rod of the first X-direction hydraulic cylinder 5 is fixedly provided with a first connecting rod 51. The connecting rod 51 is fixedly connected with the first servo motor 4, the first servo motor 4 and the base 1 are slidably matched along the X direction, and the first spline 41 is fixed coaxially on the drive shaft of the first servo motor 4, and the tool holder 2 The side facing the first servo motor 4 is provided with a first spline hole 21 for matching with the first spline 41, and the side of the tool holder 2 facing the second X-direction hydraulic cylinder 6 is provided with an X-direction positioning hole (Fig. (not shown in the figure), the piston rod of the second X-direction hydraulic cylinder 6 extends into the X-direction positioning hole (not shown in the figure); the second driving mechanism includes a second servo motor 7, a first Y-direction hydraulic cylinder 8 and a second The Y-direction hydraulic cylinder 9, the first Y-direction hydraulic cylinder 8 and the second Y-direction hydraulic cylinder 9 are respectively fixedly installed on opposite sides of the base 1, and the end of the piston rod of the first Y-direction hydraulic cylinder 8 is fixedly provided with a first Y-direction hydraulic cylinder 8. Two connecting rods 81, the second connecting rod 81 is fixedly connected with the second servo motor 7, the second servo motor 7 is slidingly matched with the base 1 along the Y direction, and the driving shaft of the second servo motor 7 is coaxially fixed with a second Splines (not shown in the figure), the side of the tool holder 2 facing the second servo motor 7 is provided with a second spline hole 22 for matching with the second splines, and the tool holder 2 faces the second Y-direction hydraulic cylinder 9 A Y-direction positioning hole (not shown in the figure) is provided on one side of the second Y-direction hydraulic cylinder 9, and the piston rod of the second Y-direction hydraulic cylinder 9 extends into the Y-direction positioning hole;

The tool holder 2 is fixedly provided with an X-direction piezoelectric ceramic driver 10, a first Y-direction piezoelectric ceramic driver 11 and a second Y-direction piezoelectric ceramic driver 12, the tool mounting platform 3 is arranged in the tool holder 2, and the X-direction piezoelectric ceramic driver An X-direction displacement magnifying hinge is provided between the ceramic driver 10 and the tool mounting platform 3, and the X-direction displacement magnifying hinge includes a first U-shaped connecting arm 13, and both ends of the first U-shaped connecting arm 13 are connected to the tool holder through a flexible hinge 200 2 Integrated connection, the inner arm of the first U-shaped connecting arm 13 is integrally connected with the tool mounting platform 3 through the flexible hinge 200, the X-direction piezoelectric ceramic driver 10 is pressed against the outer arm of the first U-shaped connecting arm 13, the first Y The position of the piezoelectric ceramic actuator 11 and the second Y-direction piezoelectric ceramic actuator 12 are staggered in the Y-direction. A first Y-direction displacement amplification hinge is provided between the first Y-direction piezoelectric ceramic actuator 11 and the tool mounting platform 3. The first Y-direction displacement amplifying hinge includes a second U-shaped connecting arm 14 and a straight arm 15 , the first Y-direction piezoelectric ceramic driver 11 abuts on the straight arm 15 , and one end of the straight arm 15 is connected to the second U-shaped connecting arm 14 The outer arms of the second U-shaped connecting arm 14 are integrated with the tool holder 2 through the flexible hinge 200, and the inner arm of the second U-shaped connecting arm 14 is integrated with the tool mounting platform 3 through the flexible hinge 200. A second Y-direction displacement amplifying hinge is provided between the second Y-direction piezoelectric ceramic driver 12 and the tool mounting platform 3, and the second Y-direction displacement amplifying hinge includes a third U-shaped connecting arm 16, and the third U-shaped connecting arm The inner arm of 16 is integrally connected with the tool mounting platform 3 through the flexible hinge 200, the second Y-direction piezoelectric ceramic driver 12 abuts on the outer arm of the third U-shaped connecting arm 16, and the open end of the third U-shaped connecting arm 16 passes through. The flexible hinge 200 is integrally connected with the tool holder 2 .

In the above-mentioned embodiment, the process that this tool rest micro-movement platform realizes the movement of five degrees of freedom is:

(1) Rotation around the X-axis: the first X-direction hydraulic cylinder 5 drives the first servo motor 4 to move along the X-direction of the base 1, so that the first spline 41 on the first servo motor 4 and the The first spline hole 21 is matched, the second X-direction hydraulic cylinder 6 drives the piston rod to extend into the X-direction positioning hole, and then the first servo motor 4 works to drive the tool holder 2 (ie, drive the tool) to rotate around the X axis.

(2) Rotation around the Y axis: first control the reset of the tool rest 2, and then drive the second servo motor 7 to move along the Y direction of the base 1 through the first Y direction hydraulic cylinder 8, so that the second servo motor 7 on the second servo motor 7 moves. The splines 41 are matched with the second spline holes 22 on the tool holder 2 , and the second Y-direction hydraulic cylinder 9 drives the piston rod to extend into the Y-direction positioning holes, and then controls the first spline 41 on the first servo motor 4 Disengaged from the first spline hole 21 on the tool holder 2, the piston rod of the second X-direction hydraulic cylinder 6 exits the X-direction positioning hole, and then controls the second servo motor 7 to work to drive the tool holder 2 (that is, drive the tool) to revolve. Y-axis rotation.

(3) Moving along the X-direction: The tool mounting platform 3 (ie, the tool) is pushed to move along the X-direction through the drive of the X-direction piezoelectric ceramic driver 10 and the displacement amplification of the X-direction displacement amplifying hinge.

(4) Moving along the Y direction: through the driving of the first Y-direction piezoelectric ceramic driver 11 or the second Y-direction piezoelectric ceramic driver 12 and the displacement amplification of the first Y-direction displacement amplifying hinge or the second Y-direction displacement amplifying hinge , and push the tool mounting platform 3 (ie, push the tool) to move along the Y direction.

(5) Rotation around the Z-axis: the first Y-direction piezoelectric ceramic driver 11 and the second Y-direction piezoelectric ceramic driver 12 are simultaneously driven to push the tool mounting platform 3 (ie, push the tool) to rotate around the Z-axis.

Claims (6)

1. a five-degree-of-freedom fast servo tool rest micro-moving platform is characterized in that comprising a base, a tool rest and a tool mounting platform for installing a tool, and the described base is provided with making the described tool rest around X A first drive mechanism for axis rotation and a second drive mechanism for rotating the tool holder around the Y axis, the tool holder is fixedly provided with an X-direction piezoelectric ceramic driver, a first Y-direction piezoelectric ceramic driver, and a first Y-direction piezoelectric ceramic driver. Two Y-direction piezoelectric ceramic drivers, the tool mounting platform is arranged in the tool holder, and an X-direction displacement amplification hinge is arranged between the X-direction piezoelectric ceramic driver and the tool mounting platform, so The first Y-direction piezoelectric ceramic driver and the second Y-direction piezoelectric ceramic driver are staggered in the Y-direction, and the first Y-direction piezoelectric ceramic driver and the tool mounting platform A first Y-direction displacement amplifying hinge is provided, and a second Y-direction displacement amplifying hinge is provided between the second Y-direction piezoelectric ceramic driver and the tool mounting platform. 2. The five-degree-of-freedom fast servo tool rest micro-movement platform according to claim 1, wherein the first drive mechanism comprises a first servo motor, a first X-direction hydraulic cylinder and a second X-direction Hydraulic cylinder, the first X-direction hydraulic cylinder and the second X-direction hydraulic cylinder are respectively fixed and installed on opposite sides of the base, and the end of the piston rod of the first X-direction hydraulic cylinder The first connecting rod is fixedly arranged at the part, the first connecting rod is fixedly connected with the first servo motor, the first servo motor and the base are slidingly matched along the X direction, and the first servo motor A first spline is fixed coaxially on the drive shaft of a servo motor, and the side of the tool holder facing the first servo motor is provided with a first spline for matching with the first spline. A key hole, the side of the tool holder facing the second X-direction hydraulic cylinder is provided with an X-direction positioning hole, and the piston rod of the second X-direction hydraulic cylinder extends into the X-direction positioning hole . 3. The five-degree-of-freedom fast servo tool rest micro-movement platform according to claim 1, wherein the second drive mechanism comprises a second servo motor, a first Y-direction hydraulic cylinder and a second Y-direction hydraulic cylinder Hydraulic cylinder, the first Y-direction hydraulic cylinder and the second Y-direction hydraulic cylinder are respectively fixed and installed on opposite sides of the base, and the end of the piston rod of the first Y-direction hydraulic cylinder A second connecting rod is fixedly arranged at the part, the second connecting rod is fixedly connected with the second servo motor, the second servo motor and the base are slidably matched along the Y direction, and the first A second spline is fixed coaxially on the drive shafts of the two servo motors, and the side of the tool holder facing the second servo motor is provided with a second spline for matching with the second spline. A key hole, the tool holder is provided with a Y-direction positioning hole on the side facing the second Y-direction hydraulic cylinder, and the piston rod of the second Y-direction hydraulic cylinder extends into the Y-direction positioning hole . 4. The five-degree-of-freedom fast servo tool rest micro-movement platform according to claim 1, wherein the X-direction displacement amplifying hinge comprises a first U-shaped connecting arm, and the first U-shaped connection Both ends of the arm are integrally connected with the tool holder through flexible hinges, the inner arm of the first U-shaped connecting arm is integrally connected with the tool mounting platform through flexible hinges, and the X-direction piezoelectric ceramic The driver abuts on the outer arm of the first U-shaped connecting arm. 5. The five-degree-of-freedom fast servo tool rest micro-movement platform according to claim 1, wherein the first Y-direction displacement amplifying hinge comprises a second U-shaped connecting arm and a straight arm, and the The first Y-direction piezoelectric ceramic driver abuts on the straight arm, one end of the straight arm is perpendicular and integrally connected with the outer arm of the second U-shaped connecting arm, and the second U-shaped connecting arm is integrally connected. The outer arm of the connecting arm is integrally connected with the tool holder through a flexible hinge, and the inner arm of the second U-shaped connecting arm is integrally connected with the tool mounting platform through a flexible hinge. 6. The five-degree-of-freedom fast servo tool rest micro-movement platform according to claim 1, wherein the second Y-direction displacement amplifying hinge comprises a third U-shaped connecting arm, and the third U-shaped The inner arm of the connecting arm is integrally connected with the tool mounting platform through a flexible hinge, the second Y-direction piezoelectric ceramic driver abuts on the outer arm of the third U-shaped connecting arm, and the first The open ends of the three U-shaped connecting arms are integrally connected with the tool holder through flexible hinges.