CN105729810A - Plane direct-drive motion system of double-shaft cylinder linear motor for three-dimensional printing - Google Patents

Abstract

The invention provides a two-axis cylindrical linear motor planar direct drive motion system for three-dimensional printing, which includes a printing device, four supporting frames forming a quadrilateral, and a motor mover, and sliding guide rails are arranged between adjacent supporting frames , the motor mover includes a first motor mover and a second motor mover arranged between two sets of opposite sliding guide rails; the printing device includes a motor controller, a first cylinder, and a The linear motor stator, the second cylindrical linear motor stator and the three-dimensional printer nozzle device, the first electric mover passes through the first cylindrical linear motor stator, and the second electric mover passes through the second cylindrical linear motor stator.

Description

A two-axis cylindrical linear motor planar direct drive motion system for 3D printing

technical field

The invention relates to a plane motion system, in particular to a plane direct-drive motion system of a two-axis cylindrical linear motor for three-dimensional printing.

Background technique

Three-dimensional printing technology is also called rapid prototyping technology, and its basic forming principle is layer-by-layer manufacturing and layer-by-layer superposition. Therefore, the motion control system is an essential part of 3D printing technology, and the molding speed and precision of 3D printing technology are closely related to the motion system.

Most of the existing 3D printing motion control systems are built on the basis of the Cartesian coordinate system, which needs to realize linear motion in the X, Y, and Z directions. Due to technical or cost constraints, transmission mechanisms such as synchronous belts and screw rods are still used in 3D printing to convert the rotary motion of stepper/servo motors into linear motion. These transmission mechanisms have complex structures, high friction and low transmission efficiency. , The transmission gap makes it difficult to improve the accuracy, and a series of problems of small speed and acceleration. Among them, due to the characteristics of heavy load, short single stroke, long interval and need to lock, the movement in the Z-axis direction is more suitable for the use of screw and other mechanisms. Therefore, the above problems are mainly reflected in the plane motion system composed of the X and Y axes.

Contents of the invention

Purpose of the invention: The technical problem to be solved by the present invention is to provide a two-axis cylindrical linear motor planar direct drive motion system for 3D printing in view of the deficiencies of the prior art.

In order to solve the above technical problems, the present invention provides a two-axis cylinder linear motor planar direct drive motion system for 3D printing, which includes a printing device, four support frames forming a quadrilateral and motor movers, and adjacent support frames There are sliding guide rails between them, and the motor movers include a first motor mover and a second motor mover arranged between two sets of opposite slide guide rails; the printing device includes motor control device, a first cylinder linear motor, a second cylinder linear motor and a three-dimensional printer nozzle device, the first motor mover passes through the first cylinder linear motor stator, and the second motor mover passes through the second cylinder linear motor motor stator.

In the present invention, a frame is provided between adjacent support frames, a grating ruler is provided on the frame, and grating reading heads are provided at both ends of the motor mover.

In the present invention, the sliding guide rail is provided with a guide rail slider that can slide along the sliding guide rail, and the motor mover is fixed on the guide rail slider.

In the present invention, the stator of the first cylindrical linear motor includes a stator core, a circular hole is opened in the center of the stator core, the motor mover passes through the circular hole, sliding bearings are arranged at both ends of the circular hole, and the stator iron The core slides on the electronic aperture through sliding bearings.

In the present invention, the stator of the second cylindrical linear motor includes a stator core, a circular hole is opened in the center of the stator core, the motor mover passes through the circular hole, sliding bearings are arranged at both ends of the circular hole, and the stator iron The core slides on the electronic aperture through sliding bearings.

In the present invention, the four supporting frames form a square structure.

In the present invention, the first motor mover and the second motor mover are respectively an X-axis motor mover and a Y-axis motor mover, and the X-axis motor mover and the Y-axis motor mover are perpendicular to each other.

In the present invention, the support frame includes a lift motor controller and a lift motor stator located at the lower end of the lift motor controller, and a lift motor mover is provided at the lower end of the support bracket, and the lift motor mover passes through the lift motor stator.

Beneficial effects: the two-axis cylindrical linear motor planar direct drive motion system for 3D printing provided by the present invention is relatively simple in structure, the friction between the sliding guide rail and the guide rail slider is relatively small, and the friction between the electronic mover and the stator core is relatively small. Therefore, the transmission efficiency is high, and with the grating reading head and grating ruler, the movement accuracy can be improved during automatic operation. Two sets of vertical cylindrical linear motors are used to form a planar direct drive motion system, which meets the requirements of 3D printing for motion control speed, accuracy and efficiency. At the same time, two sets of position detection in one direction can effectively improve the reliability of the system.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, and the advantages of the above and other aspects of the present invention will become clearer.

Figure 1 is the overall structure diagram of the biaxial direct drive motion system;

Fig. 2 is a schematic diagram of a printing device;

Fig. 3 is a sectional view of a single motor;

FIG. 4 is a schematic structural view of Embodiment 2.

detailed description

The present invention will be described in detail below in conjunction with the accompanying drawings.

Example 1:

As shown in the overall schematic diagram of Figure 1, the present invention includes a support frame 10, a sliding guide rail 20, a guide rail slider 30, a grating reading head 40, a grating ruler 50, a printing device 60, a motor controller 80, and a two-axis cylindrical linear motor 90. The first cylindrical linear motor stator 91, the second cylindrical linear motor stator 92, the first electric mover 930a and the second electric mover 930b, wherein the sliding guide rail 20 includes the first sliding guide rail 20a and the second sliding guide rail 20b , the third sliding guide rail 20c and the fourth sliding guide rail 20d, the first sliding guide rail 20a is provided with the first guide rail slider 30a, the second sliding guide rail 20b is provided with the second rail slider 30b, and the third sliding guide rail 20c is provided with There is a third guide rail slider 30c, and a fourth guide rail slider 30d is arranged on the fourth sliding guide rail 20d. The biaxial cylindrical linear motor 90 includes a first cylindrical linear motor stator 91 and a second cylindrical linear motor stator 92. A first motor mover 930a is provided between the first guide rail slider 30a and the third guide rail slider 30c, and a second motor mover 930b is provided between the second guide rail slider 30b and the fourth guide rail slider 30d.

The dual-axis cylindrical linear motor 90 and its controller 80 of the present invention are installed on the support frame 10, and the four sides of the support frame are equipped with sliding guide rails 20, and the two ends of the first motor mover and the second motor mover are fixed. On the corresponding four guide rail sliders 30, one grating read head 40 is installed on each guide rail slider 30, and a grating ruler 50 is installed at the corresponding position of each frame of the support frame according to the movement stroke, and the signal output of the grating read head For the motor controller 80, the motor controller 80 is installed at the stator of the biaxial cylindrical linear motor 90.

As shown in Figure 2, the printing device 60 includes a motor controller 80, a first cylinder linear motor 91, a second cylinder linear motor 92 and a three-dimensional printer nozzle device 100 arranged in sequence from top to bottom, and the two-axis cylinder linear motor stator consists of Two sets of cylindrical linear motor stators 91 and 92 are vertically stacked up and down; the cylindrical linear motor stators 91 and 92, and the motor controller 80 are combined together by bolts or riveting, and the cylindrical linear motor stators 91 and 92 The stator windings of the three-dimensional printer are connected to the motor controller 80; the three-dimensional printer nozzle device 100 is placed under the cylindrical linear motor, and combined with the stator parts of the cylindrical linear motor stators 91 and 92 by means of bolts or riveting.

The first motor mover 930a and the second motor mover 930b are respectively an X-axis motor mover and a Y-axis motor mover, and the X-axis motor mover and the Y-axis motor mover are perpendicular to each other.

As shown in the sectional view of a single cylindrical linear motor in FIG. 3 , the single cylindrical linear motor is mainly composed of a stator core 910 , a stator winding 920 , a motor mover 930 , and a sliding bearing 940 .

The stator core 910 is made of silicon steel sheets, the X-axis cylindrical linear motor stator silicon steel sheets are stacked along the vertical Y-axis direction, the Y-axis cylindrical linear motor stator silicon steel sheets are stacked along the vertical X-axis direction; the stator iron A circular hole is opened in the center of the core, and the diameter of the circular hole is equal to the diameter of the mover plus 2 times the length of the air gap; around the central circular hole, circular slots are formed on the stator core at a certain interval, and the number of circular slots is determined by the number of motor phases and the movement The stroke is determined; the stator windings of each phase are placed in the corresponding circular slots; a set of sliding bearings are installed at both ends of the stator to play a supporting role.

The motor mover 930 is made of steel or iron casting, and is finished to ensure concentricity and surface finish, and is treated for rust prevention.

The motor controller 80 drives the corresponding X and Y axis cylindrical linear motors according to the control signals of the host computer and the position feedback signals of the four groups of grating read heads 40 . Two groups of coaxial position feedback signals back up each other. When one group fails, the system can still continue to work; when there is no failure, compare the two groups of coaxial position feedback signals in real time. The operation of the terminal is inconsistent, and the mechanical structure is faulty, and the prompt signal is output to the host computer.

Example 2:

The difference between this embodiment and Embodiment 1 is that, on the basis of including all the structures of Embodiment 1, a vertical lift structure in the Z-axis direction is also added, as shown in Figure 4, including a motor controller 70, a lift motor stator 71 and The lifting motor mover 730, the support frame 10 includes the lifting motor controller 70 and the lifting motor stator 71 positioned at the lower end of the lifting motor controller 70, the lower end of the support bracket 10 is provided with the lifting motor mover 730, and the lifting motor mover 730 wears Through the lifting motor stator 71. Embodiment 2 realizes the lifting and lowering of the motion system in the height direction, and cooperates with Embodiment 1 to realize the effect of three-dimensional printing.

The present invention provides a two-axis cylindrical linear motor planar direct-drive motion system for three-dimensional printing. There are many methods and approaches for realizing the technical solution. The above descriptions are only preferred implementation modes of the present invention. Those of ordinary skill in the art can make some improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention. All components that are not specified in this embodiment can be realized by existing technologies.

Claims (8)

1. A two-axis cylindrical linear motor planar direct drive motion system for three-dimensional printing, characterized in that it includes a printing device (60), four support frames (10) and a motor mover (930) forming a quadrilateral, and the relative Sliding guide rails (20) are provided between adjacent support frames (10), and the motor mover (930) includes a first motor mover (930a) and The second motor mover (930b); the printing device (60) includes a motor controller (80), a first cylindrical linear motor stator (91), a second cylindrical linear motor stator ( 92) and a three-dimensional printer nozzle device (100), the first motor mover (930a) passes through the first cylinder linear motor stator (91), and the second motor mover (930b) passes through the second cylinder linear motor stator (92). 2. A kind of three-dimensional printing according to claim 1 uses two-axis cylindrical linear motor planar direct-drive motion system, is characterized in that, be provided with frame between adjacent support frame (10), be provided with on the frame There is a grating ruler (50), and grating reading heads (40) are arranged at both ends of the motor mover (930). 3. A two-axis cylinder linear motor planar direct drive motion system for three-dimensional printing according to claim 1, characterized in that, the sliding guide rail (20) is provided with a guide rail that can slide along the sliding guide rail (20) The slider (30), the motor mover (930) is fixed on the guide rail slider (30). 4. A two-axis cylindrical linear motor planar direct drive motion system for 3D printing according to claim 1, characterized in that the first cylindrical linear motor stator (91) includes a stator core (910), There is a round hole in the center of the stator core (910), the motor mover passes through the round hole, sliding bearings (940) are arranged at both ends of the round hole, and the stator core (910) passes through the sliding bearings (940) in the motor Slide on the motor. 5. A two-axis cylindrical linear motor planar direct drive motion system for 3D printing according to claim 1, characterized in that the second cylindrical linear motor stator (91) includes a stator core (910), The center of the stator core (910) has a circular hole through which the motor mover passes. Sliding bearings (940) are arranged at both ends of the circular hole, and the stator core (910) is mounted on the motor mover through the sliding bearing. slide. 6 . A two-axis cylindrical linear motor planar direct drive motion system for 3D printing according to claim 1 , wherein the four supporting frames ( 10 ) form a square structure. 7. A two-axis cylinder linear motor planar direct drive motion system for 3D printing according to claim 1 or 6, characterized in that the first motor mover (930a) and the second motor mover (930b) are respectively It is an X-axis motor mover and a Y-axis motor mover, and the X-axis motor mover and the Y-axis motor mover are perpendicular to each other. 8. A two-axis cylinder linear motor planar direct drive motion system for 3D printing according to claim 1, characterized in that the support frame (10) includes a lift motor controller (70) and a lift motor controller (70) The lifting motor stator (71) at the lower end of the controller (70), the lower end of the support bracket (10) is provided with a lifting motor mover (730), and the lifting motor mover (730) passes through the lifting motor stator (71).