CN207449126U - Rotary table and 3D printing device - Google Patents

Abstract

The utility model discloses a rotary worktable and a 3D printing device, which is characterized in that it comprises three driven and telescopic support arms and a worktable, and the support arms are evenly distributed and are rotatably connected to one end of the worktable. , and the other end is swingably connected with the carrier board. The rotary working platform of the utility model can implement ±45 degree rotation. By controlling the movement of the motor to meet the various position requirements of the extrusion head, the printing function of any three-dimensional model is realized, which solves the problems of the transitional area and the cantilever structure, reduces the use of support materials, and avoids the need for materials The waste is increased, the printing space is increased, and the quality and efficiency of product printing are improved.

Description

Rotary table and 3D printing device

technical field

The utility model relates to the technical field of 3D printing devices, in particular to a rotary worktable and a 3D printing device.

Background technique

3D printing technology is based on digital model files, using powdery materials or filamentous materials or liquid materials to construct three-dimensional objects through bonding and curing. According to the molding method, it can be divided into fused deposition (FDM), stereolithography (SLA), selective laser sintering (SLS), layered entity manufacturing (LOM) and so on.

Fused deposition technology (FDM) is a kind of 3D printing technology. Now, the more popular fused deposition 3D printers on the market are mainly three-axis, generally using slide rails or synchronous belt transmission, and their movement methods can be classified into two categories: the first category is X-axis and Y-axis composite and printer The extrusion head moves, and the working platform moves independently on the Z axis; the second type is the movement of the X-axis and Y-axis combined with the working platform, while the printer extrusion head moves independently on the Z axis. The extrusion head of the first type of printer prints on the X-Y plane. When printing sharp corners or curved surfaces with a large slope, the filament will be twisted; when the second type of printer prints molded parts of the same size, its The required movement space is the largest, and at the same time, the mass of the worktable is large, which is not conducive to the improvement of printing speed. Due to the limitations of the three axes, the current 3D printers require a large number of supporting structures to assist when printing models with cantilever or suspension structures, which reduces printing efficiency, increases printing costs, and increases the difficulty of post-processing. In addition, composite material printing will be an important trend in the development of 3D printing. However, due to the limitations of the current printer structure, a ladder effect is inevitable.

Chinese patent CN 106113512 A discloses a five-axis linkage 3D printing platform, which includes a platform frame, etc., the left side of the platform frame is provided with a first guide rod fixing seat and a second guide rod fixing seat, and the second guide rod is fixed The seat is located behind the first guide rod fixing seat, the first Y-axis guide rod and the second Y-axis guide rod are respectively fixed by the first guide rod fixing seat and the second guide rod fixing seat, and the first Y-axis guide rod and the second Y-axis guide rod The Y-axis guide rods are parallel, the Y-axis motor is located between the first Y-axis guide rod and the second Y-axis guide rod and close to the left side of the platform bracket, the Y-axis motor is equipped with a Y-axis belt, and the support plate is located on the first Y-axis Above the guide rod and the second Y-axis guide rod, the platform shell is located above the support plate.

Although it adds two A and C rotation degrees of freedom on the basis of X, Y, and Z axes, it can make the printed body do rotary motion, which increases the printing flexibility of the 3D printer to a certain extent, and can process models with complex surfaces; However, each motion is controlled independently, especially the rotation control, which increases the complexity of the control.

Utility model content

The purpose of the utility model is to provide a 3D printing device with a rotatable workbench aiming at the technical defects existing in the prior art.

The technical scheme adopted for realizing the purpose of this utility model is:

A rotary workbench comprises three driven and telescopic support arms and a worktable. The support arms are evenly distributed and are rotatably connected to the workbench at one end and swingably connected to the carrier plate at the other end.

It also includes a base frame, and the carrier plate of the rotary table is fixedly connected with the bottom of the base frame.

The support arm includes a support rod connected to the carrier plate through a rotating shaft, a linear slide rail fixedly connected to the support rod, fixedly connected to the support rod and driving the screw nut along the straight line A lead screw motor that moves the slide rail, and a connecting rod that is fixedly connected at one end to the lead screw nut and rotatably connected to the workbench at the other end.

The connecting rod is rotatably connected with the worktable through joint bearings.

The connecting rod is a hollow tube, and the lead screw of the lead screw motor can be matedly inserted into the connection and rotate freely.

The support arm includes a support rod connected to the carrier board through a rotating shaft, a linear slide rail fixedly connected to the support rod, and a linear slide rail fixedly connected to the support rod and driving the slider to slide along the straight line A telescopic motor for rail movement, and a connecting rod with one end fixedly connected to the slider and the other end rotatably connected to the worktable.

A method for controlling a rotary table, comprising:

The three support arms are synchronously telescopic to drive the translation of the worktable in the Z direction,

One of the three support arms is extended, and the other two support arms are synchronously shortened to rotate around the X-axis or the Y-axis.

Compared with the prior art, the beneficial effects of the utility model are:

The rotary working platform of the utility model can implement ±45 degree rotation. By controlling the movement of the motor to meet the various position requirements of the extrusion head, the printing function of any three-dimensional model is realized, which solves the problems of the transitional area and the cantilever structure, reduces the use of support materials, and avoids the need for materials The waste is increased, the printing space is increased, and the quality and efficiency of product printing are improved.

Description of drawings

Fig. 1 is a schematic view of the oblique view of the 3D printing device with a rotatable workbench of the present invention.

Fig. 2 is a schematic left view structural diagram of the 3D printing device shown in Fig. 1;

Figure 3 is a schematic diagram of the front view of the 3D printing device shown in Figure 1;

FIG. 4 is a schematic cross-sectional structure diagram of the 3D printing device shown in FIG. 2;

FIG. 5 is a schematic top view of the structure shown in FIG. 1 .

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

As shown in Figures 1-5, the 3D printing device with a rotatable workbench of the present invention includes,

The translational movement mechanism 1 is used to carry the extrusion head and drive the extrusion head 3 to move in translation; such as the translation of the X-axis and the Y-axis,

The rotary workbench 2 includes three driven and telescopic support arms 21 and a worktable 20, the support arms are evenly distributed and are rotatably connected to the workbench at one end and swingably connected to the carrier plate 22 at the other end, namely , Three support arms uniformly distributed along the circumference of the worktable at 120 degrees move synchronously to realize the translation of the worktable, such as Z-axis movement; the three support arms move at different times to realize the rotation of the worktable. Such as flipping around the X-axis and Y-axis.

The utility model decomposes the 5-axis movement of 3D printing into the translation of the extrusion head in the plane, the lifting of the worktable, and the movement around the X-axis and Y-turning, which can realize ±45-degree rotation around the X-axis and Y-axis. By controlling the movement of the motor, it can meet the various position requirements of the workbench, realize the printing of any three-dimensional model, solve the problems of the ladder effect and the cantilever structure, reduce the use of support materials, and realize the composite material along the Print in any fiber direction.

Preferably, in order to improve the integrity of the equipment, a base frame is also included, the translational movement mechanism is fixed on the top of the base frame, and the carrier plate 21 of the rotary table is fixedly connected to the bottom of the base frame. The frame is a square frame structure, which is composed of industrial aluminum profiles fixedly connected by right-angle pieces, and is light in weight and strong in force. Making full use of the industrial aluminum profiles can save space.

Specifically, the translational movement mechanism includes an X-direction driving part, which includes two X-guiding rods 11 respectively arranged on both sides of the base frame, which are respectively slidably arranged on the X-guiding rods through linear bearings. The two X-bearing blocks 13 on the top, and the X-direction drive motor that drives the X-direction block to move along the X guide rod; the Y-direction drive part, which includes two ends fixed to the X-direction block The connected Y guide rod 12 is slidably arranged on the Y-direction carriage through a linear bearing, and is fixedly connected with one of the X-direction carriage blocks to drive the Y-direction carriage to move along the Y guide rod. to drive the motor, and the extrusion head is arranged on the Y-direction carriage.

Among them, the X-direction drive motor and the Y-direction drive motor are respectively driven by a synchronous belt. At the same time, the X-direction motor also includes a synchronous transmission rod to realize the synchronous movement of the X-direction carrier blocks on both sides. One synchronous drive and two synchronous pulleys, synchronous drive on both sides, effectively ensure the smooth operation.

Specifically, the support arm 21 is swingably connected to the working platform 20 through a rotating shaft, that is, forms a spherical pair, and its upper end is rotatably connected to the working platform through a joint bearing. Wherein, one of the three rotation axes is perpendicular or parallel to the X direction to simplify the control.

In terms of specific implementation, as one of the embodiments, the support arm 21 includes a support rod connected to the carrier plate through a rotating shaft, a linear slide rail 211 fixedly connected to the support frame, and a linear slide rail 211 fixedly connected to the support frame. A screw motor 213 whose rod is fixedly connected and drives the screw nut to move along the linear slide rail, and a connecting rod 212 whose end is fixedly connected to the screw nut 214 and whose end is rotatably connected to the worktable, That is, the screw nut is fixedly arranged on the slider matching the linear slide rail, the axial direction of the screw motor is parallel to the axial direction of the linear slide rail, and the movement of the connecting rod can be realized through the movement of the screw motor. Movement, thereby realizing the expansion and contraction of the support arm.

Preferably, the connecting rod and the hollow tube, the lead screw of the lead screw motor can be matedly inserted into the connection and rotate freely. This can effectively save space and provide effective printing space. In this embodiment, a lead screw motor and a slide rail slider device are used to control the expansion and contraction of the three support arms, and the structure is more compact and easy to control while saving costs.

As the second embodiment of the support arm of the present invention, the support arm includes a support rod connected to the carrier plate through a rotating shaft, a linear slide rail fixedly connected to the support frame, and a The support rod is fixedly connected to a telescopic motor that drives the slider to move along the linear slide rail, and a connecting rod that is fixedly connected at one end to the slider and rotatably connected to the worktable at the other end.

Utilizing the telescopic motor to realize the expansion and contraction of the support arm through the synchronous belt can also realize the above-mentioned control, and the transmission connection is carried out through the synchronous belt, which requires less space and is more convenient to set up.

The control method of the 3D printing device with a rotatable workbench described in the utility model includes:

The X-direction drive motor and the Y-direction drive motor respectively drive the extrusion head to translate in the X and Y directions,

The three support arms are synchronously telescopic to drive the translation of the worktable in the Z direction,

One of the three support arms is extended, and the other two support arms are shortened synchronously to realize the rotation around the X-axis or Y-axis. At the same time, while realizing the rotation around the X-axis or Y-axis, it can also move up and down with the Z-axis. .

When realizing rotation, such as rotation around the X-axis, the axis of rotation is to rotate around the center of the platform. Through the elongation of one of the support arms, the contraction of the other two above-mentioned support arms is realized, that is, all three support arms will move. During the printing process, the working platform in the Z-axis direction needs to be descended while rotating, and the specific descending height depends on the shape of the model. In the specific control process, because the print head realizes the movement of the X axis and the Y axis, the control is relatively simple, so the trajectory of the print head movement needs to match the trajectory of the platform movement to realize five-axis linkage printing. The three-arm support working platform can only realize one movement and two rotations. During the printing process, it must cooperate with the movement of the X-axis and Y-axis of the extrusion head to avoid interference problems.

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made, these Improvement and retouching should also be regarded as the protection scope of the present utility model.

Claims (3)

1. a kind of rotary table, which is characterized in that including three flexible support arms and working plate driven, the branch Brace is uniformly distributed and is rotatably connected with one end and working plate, and the other end and the swingable connection of support plate further include pedestal, institute The support plate for the rotary table stated is fixedly connected with the pedestal bottom, and the support arm includes passing through with the support plate The supporting rod of shaft connection, the line slide rail being fixedly connected with the supporting rod are fixedly connected and drive with the supporting rod The spindle motor and one end that dynamic feed screw nut is moved along the line slide rail are fixedly connected with one end with the feed screw nut The connecting rod being rotatably connected with the working plate, the connecting rod are rotatable by oscillating bearing and the working plate Connection, the connecting rod are hollow tube, and the leading screw of the spindle motor can matchingly be inserted into the connecting rod and freely turn It is dynamic.

2. a kind of rotary table, which is characterized in that including three flexible support arms and working plate driven, the branch Brace is uniformly distributed and is rotatably connected with one end and working plate, and the other end and the swingable connection of support plate further include pedestal, institute The support plate for the rotary table stated is fixedly connected with the pedestal bottom, and the support arm includes passing through with the support plate The supporting rod of shaft connection, the line slide rail being fixedly connected with the supporting rod are fixedly connected and drive with the supporting rod The telescope motor and one end that movable slider is moved along the line slide rail be fixedly connected with the sliding block one end with it is described The connecting rod that working plate is rotatably connected, the connecting rod are rotatably connected by oscillating bearing and the working plate, institute The connecting rod stated is hollow tube, and the output terminal of the telescope motor can matchingly be inserted into the connecting rod and move freely.

3. a kind of 3D printing device having such as claim 1-2 any one of them rotary tables.