阅读说明：本技术 一种高效自动化三维打印系统及方法 (Efficient automatic three-dimensional printing system and method ) 是由 林逢春 陈玉泳 周全云 吴立新 于 2021-08-13 设计创作，主要内容包括：本发明公开一种高效自动化三维打印系统,包括打印装置,所述打印装置包括打印头；还包括对打印完成的工件进行粗打磨的第一打磨装置以及对工件进行精打磨的第二打磨装置；所述第一打磨装置包括装夹工件的装夹机构以及对工件进行打磨的打磨机构；所述装夹机构包括装夹台,位于装夹台上的第一抵顶机构,以及第二抵顶机构。本案通过两道打磨工序,可以使工件表面更加光滑；另外在打印头中设置对材料进行预热的预热管道以及对材料进行熔融的熔融管道,原材料在进入打印头之前为粉末状态,之后经过预热管道和熔融管道,使原材料变成熔融状态,由于打印头具有熔融功能,所以打印头不容易出现堵料情况,解决了现有打印头容易出现堵料的问题。(The invention discloses an efficient automatic three-dimensional printing system, which comprises a printing device, a printing device and a printing system, wherein the printing device comprises a printing head; the device also comprises a first grinding device for roughly grinding the printed workpiece and a second grinding device for finely grinding the workpiece; the first grinding device comprises a clamping mechanism for clamping a workpiece and a grinding mechanism for grinding the workpiece; the clamping mechanism comprises a clamping table, a first abutting mechanism and a second abutting mechanism, wherein the first abutting mechanism and the second abutting mechanism are positioned on the clamping table. According to the scheme, the surface of the workpiece can be smoother through two polishing procedures; in addition, a preheating pipeline for preheating the material and a melting pipeline for melting the material are arranged in the printing head, the raw material is in a powder state before entering the printing head and then passes through the preheating pipeline and the melting pipeline to be changed into a melting state, and the printing head has a melting function, so that the situation of material blockage is not easy to occur in the printing head, and the problem that the material blockage is easy to occur in the conventional printing head is solved.)

1. An efficient automated three-dimensional printing system comprising a printing device comprising a print head; the method is characterized in that: the device also comprises a first grinding device for roughly grinding the printed workpiece and a second grinding device for finely grinding the workpiece; the first grinding device comprises a clamping mechanism for clamping a workpiece and a grinding mechanism for grinding the workpiece; the clamping mechanism comprises a clamping table, a first abutting mechanism and a second abutting mechanism, wherein the first abutting mechanism and the second abutting mechanism are positioned on the clamping table; the polishing mechanism comprises a plurality of polishing assemblies arranged in parallel, a mounting frame for mounting the plurality of polishing assemblies, and a polishing table for bearing the mounting frame; the mounting rack is slidably mounted on the grinding table; the polishing assembly comprises a polishing piece and a mounting block for mounting the polishing piece; the polishing piece is detachably connected with the mounting block; the polishing piece is provided with a polishing part contacted with the workpiece and an installation part connected with the installation block; the polishing part is arc-shaped.

2. An efficient automated three-dimensional printing system according to claim 1, wherein: the first abutting mechanism comprises a first abutting column and a first driving cylinder for driving the first abutting column to stretch; the second abutting mechanism comprises a second abutting column and a second driving cylinder for driving the second abutting column to stretch; the central axis of the first abutting column is on the same straight line with the central axis of the second abutting column.

3. An efficient automated three-dimensional printing system according to claim 2, wherein: the second abutting mechanism is slidably mounted on the clamping table.

4. An efficient automated three-dimensional printing system according to claim 1, wherein: the polishing pieces are two and are respectively arranged at two ends of the mounting block.

5. An efficient automated three-dimensional printing system according to claim 4, wherein: the sanding assembly also includes an elastically compliant module located within the mounting block.

6. An efficient automated three-dimensional printing system according to claim 5, wherein: the elastic adaptation module comprises a first spring, a second spring and a bearing block for mounting the first spring and the second spring; the first spring and the second spring are symmetrically arranged on two sides of the bearing block respectively and face the polishing piece.

7. An efficient automated three-dimensional printing system according to claim 6, wherein: the bearing block is also provided with a first guide post inserted in the first spring and a second guide post inserted in the second spring; the length of the first guide post is smaller than that of the first spring in a natural state, and the length of the second guide post is smaller than that of the second spring in the natural state.

8. An efficient automated three-dimensional printing system according to claim 7, wherein: a first mounting column for stabilizing the first spring and a second mounting column for stabilizing the second spring are also formed in the mounting block; the first mounting column is provided with a first guide hole matched with the first guide column, and the second mounting column is provided with a second guide hole matched with the second guide column.

9. An efficient automated three-dimensional printing system according to claim 8, wherein: and a guide groove for the bearing block to slide is formed in the mounting block.

10. An efficient automated three-dimensional printing system according to claim 9, wherein: the bearing block is also provided with a connecting hole connected with the mounting rack.

Technical Field

The invention relates to a three-dimensional printing technology, in particular to an efficient automatic three-dimensional printing system and method.

Background

Three-dimensional printing techniques are in wide use today. Three-dimensional (3D) rapid prototyping, also known as additive manufacturing, is the basic process of creating three-dimensional objects by printing or laying down successive layers of material. Three-dimensional printing devices work by transforming a three-dimensional computer model of an object and generating a series of cross-sectional slices, and then printing each slice, one on top of the other, to produce the final three-dimensional object. When the existing printer is used for printing, raw materials enter the printing head after being melted, and after the printing head stops working for a period of time, the raw materials are easy to solidify in the printing head, so that the printing head is blocked.

In view of the above, the applicant has made an intensive study to solve the above problems and has made the present invention.

Disclosure of Invention

The invention mainly aims to provide an efficient automatic three-dimensional printing system and method, and solves the problem that an existing printing head is easy to block.

In order to achieve the above purpose, the solution of the invention is: an efficient automated three-dimensional printing system is provided, comprising a printing device comprising a print head; the device also comprises a first grinding device for roughly grinding the printed workpiece and a second grinding device for finely grinding the workpiece; the first grinding device comprises a clamping mechanism for clamping a workpiece and a grinding mechanism for grinding the workpiece; the clamping mechanism comprises a clamping table, a first abutting mechanism and a second abutting mechanism, wherein the first abutting mechanism and the second abutting mechanism are positioned on the clamping table.

Further, the first abutting mechanism comprises a first abutting column and a first driving cylinder for driving the first abutting column to stretch; the second abutting mechanism comprises a second abutting column and a second driving cylinder for driving the second abutting column to stretch; the central axis of the first abutting column is on the same straight line with the central axis of the second abutting column.

Further, the second abutting mechanism is slidably mounted on the clamping table.

Further, the polishing mechanism comprises a plurality of polishing assemblies arranged in parallel, a mounting rack for mounting the plurality of polishing assemblies, and a polishing table for bearing the mounting rack; the mounting bracket is slidably mounted on the polishing table.

Further, the grinding assembly comprises a grinding piece and a mounting block for mounting the grinding piece; the polishing piece is detachably connected with the mounting block.

Further, the polishing piece is provided with a polishing part contacted with the workpiece and an installation part connected with the installation block; the polishing part is arc-shaped.

Furthermore, the polishing pieces are two and are respectively arranged at two ends of the mounting block.

Further, the sanding assembly also includes an elastically compliant module located within the mounting block.

Further, the elastic adaptation module comprises a first spring, a second spring and a bearing block for mounting the first spring and the second spring; the first spring and the second spring are respectively located at two ends of the bearing block and face the polishing piece.

Furthermore, a first guide post inserted in the first spring and a second guide post inserted in the second spring are also arranged on the bearing block; the length of the first guide post is smaller than that of the first spring in a natural state, and the length of the second guide post is smaller than that of the second spring in the natural state.

Furthermore, a first mounting column for stabilizing the first spring and a second mounting column for stabilizing the second spring are formed in the mounting block; the first mounting column is provided with a first guide hole matched with the first guide column, and the second mounting column is provided with a second guide hole matched with the second guide column.

Furthermore, a guide groove for the bearing block to slide is formed in the mounting block.

Furthermore, a connecting hole connected with the mounting rack is formed in the bearing block.

Further, the mounting rack comprises clamping arms positioned on two sides of the polishing assembly and a mounting seat for bearing the clamping arms; the mounting seat is slidably mounted on the polishing table.

Further, the structure of the first grinding device is consistent with that of the second grinding device.

Further, the printing head comprises a feeding hole, a material conveying section communicated with the feeding hole, and a material discharging section communicated with the material conveying section; a preheating pipeline for preheating the raw materials is arranged in the material conveying section, and a melting pipeline for melting the raw materials is arranged in the material discharging section; the preheating pipeline is communicated with the melting pipeline; the discharging section is provided with a connecting end communicated with the conveying pipeline and an output end for outputting raw materials; the discharge section is in a circular truncated cone shape, and the cross-sectional area from the connecting end to the output end is gradually reduced.

Furthermore, a plurality of preheating pipelines are arranged in the material conveying section and surround the central axis of the material discharging section.

Further, the preheating pipeline comprises a direct current section and a confluence section; the direct current section is parallel to the central axis of the discharge section, and the confluence section is gradually inclined towards the central axis of the discharge section.

Further, the printing head also comprises a pre-melting mechanism for pre-melting the lower layer material.

Further, the premelting mechanism comprises a preheating piece for preheating the lower-layer material and a rotary driving assembly for driving the preheating piece to rotate around the central axis of the discharging section.

Further, the rotary drive assembly includes a bracket to which the pre-heat member is mounted; the bracket comprises a connecting part which is rotatably connected with the material conveying section and a supporting part for bearing the preheating part; the connecting part is a circular ring sleeved on the material conveying section, and the supporting part is fixedly connected to the outer side of the circular ring.

Furthermore, the rotary driving component also comprises a first gear fixedly sleeved on the material conveying section and a second gear which is positioned on the supporting part and matched with the first gear; and a first motor driving the second gear to rotate.

Further, the preheating part comprises a connecting section connected with the connecting part and a preheating section for preheating the lower-layer material, the connecting section is parallel to the central axis of the discharging section, and the preheating section is obliquely arranged towards the discharging section.

Furthermore, the printing device also comprises a feeding device for feeding the printing head; and a feeding pipe connected with the feeding hole is arranged on the litigation feeding device.

An efficient automatic three-dimensional printing method comprises the following steps:

a. constructing a workpiece model;

b. layering the model along the Z direction to generate the section profile information of the workpiece;

c. printing the workpiece layer by layer according to the section profile information by a printing device;

d. and polishing and grinding the printed workpiece.

Further, in the step (c), the printing device is used for printing the workpiece, when the first layer is printed, the printing head is directly used for ejecting the material according to the contour information, when the second layer and the subsequent contour layer are printed, the printed contour of the previous layer is preheated through the preheating mechanism on the printing head, and then the printing head continues to eject and print.

Further, in the step (d), the first polishing device is adopted to perform rough polishing on the workpiece, and the second polishing device is adopted to perform fine polishing on the workpiece.

After adopting the structure, the high-efficiency automatic three-dimensional printing system and the method thereof have the following beneficial effects compared with the prior art:

the method comprises the steps that a preheating pipeline for preheating materials and a melting pipeline for melting the materials are arranged in a printing head, raw materials are in a powder state before entering the printing head, and then the raw materials pass through the preheating pipeline and the melting pipeline to be changed into a melting state, and the printing head has a melting function, so that the printing head is not prone to blocking.

When printing the second layer and the contour layer behind the second layer, the preheating mechanism on the printing head is firstly used for preheating the contour layer of the previous layer to soften the contour layer, and then the printing head is used for continuously printing, so that the adhesion between the adjacent contour layers is firmer.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural diagram of a first polishing apparatus according to the present invention;

FIG. 3 is a schematic diagram of a sanding assembly according to the present invention;

FIG. 4 is a schematic cross-sectional view of a sanding assembly of the present invention;

FIG. 5 is a schematic view of a printhead according to the present invention;

fig. 6 is a schematic cross-sectional view of a printhead according to the present invention.

In the figure:

1-printing head, 11-feeding port, 12-material conveying section, 121-preheating pipeline, 1211-direct current section, 1212-confluence section, 13-discharging section, 131-melting pipeline, 132-connecting end, 133-output end, 14-premelting mechanism, 141-preheating piece, 1411-connecting section, 1412-preheating section, 142-rotary driving component, 1421-bracket, 1422-first gear, 1423-second gear and 1424-first motor;

2-feeding device, 21-feeding pipe;

3-a first grinding device, 31-a clamping mechanism, 311-a clamping table, 312-a first abutting mechanism, 3121-a first abutting column, 313-a second abutting mechanism, 3131-a second abutting column, 32-a grinding mechanism, 321-a grinding assembly, 3211-a grinding piece, 3212-an installation block, 32121-a first installation column, 32122-a first guide hole, 32123-a second installation column, 32124-a second guide hole, 32125-a guide groove, 3213-an elastic adaptation module, 32131-a first spring, 32132-a second spring, 32133-a bearing block, 32134-a first guide column, 32135-a second guide column, 32136-a connecting hole, 322-a 3221-a clamping arm, an installation frame 3222-an installation seat and 323-a grinding table;

4-a second grinding device.

Detailed Description

In order to further explain the technical solution of the present invention, the present invention is explained in detail by the following specific examples.

As shown in fig. 1-6, an efficient automated three-dimensional printing system includes a printing apparatus including a print head 1; the device also comprises a first grinding device 3 for roughly grinding the printed workpiece and a second grinding device 4 for finely grinding the workpiece; the first grinding device 3 comprises a clamping mechanism 31 for clamping a workpiece and a grinding mechanism 32 for grinding the workpiece; the clamping mechanism 31 includes a clamping table 311, a first abutting mechanism 312 located on the clamping table 311, and a second abutting mechanism 313. The first grinding device 3 and the second grinding device 4 are only suitable for revolving body workpieces; the first abutting mechanism 312 and the second abutting mechanism 313 can clamp and fix the workpiece, so as to polish the workpiece, and prevent the workpiece from sliding during polishing.

Preferably, the first abutting mechanism 312 includes a first abutting column 3121, and a first driving cylinder for driving the first abutting column 3121 to extend and retract; the second propping mechanism 313 comprises a second propping column 3131 and a second driving cylinder for driving the second propping column 3131 to stretch; the central axes of the first supporting columns 3121 and the central axes of the second supporting columns 3131 are on the same straight line. The second abutting mechanism 313 is slidably mounted on the clamping table 311. By slidably mounting the second abutting mechanism 313 on the clamping table 311, the clamping mechanism 31 can be adapted to workpieces of different sizes.

Preferably, the grinding mechanism 32 comprises a plurality of grinding assemblies 321 arranged side by side, a mounting frame 322 for mounting the plurality of grinding assemblies 321, and a grinding table 323 for bearing the mounting frame 322; the mounting bracket 322 is slidably mounted on the grinding table 323. Through a plurality of polishing assemblies 321 arranged in parallel, the polishing device can adapt to workpieces in different shapes and can polish the workpieces effectively.

Preferably, the grinding assembly 321 includes a grinding member 3211, and a mounting block 3212 to which the grinding member 3211 is mounted; the grinding piece 3211 is detachably connected with the mounting block 3212. The sanding element 3211 is removably connected to the mounting block 3212 to facilitate replacement of the sanding element 3211.

Preferably, the sanding member 3211 has a sanding portion that contacts the workpiece, and a mounting portion that is connected to the mounting block 3212; the polishing part is arc-shaped. The grinding members 3211 are provided in two numbers and are respectively installed at both ends of the mounting block 3212. The sanding assembly 321 further includes a resilient adaptor module 3213 located inside the mounting block 3212. The elastic adaptation module 3213 includes a first spring 32131, a second spring 32132, and a carrier block 32133 mounting the first spring 32131 and the second spring 32132; a first spring 32131 and a second spring 32132 are located at each end of the carrier block 32133 and are disposed toward the sanding member 3211. A first guide post 32134 inserted in the first spring 32131 and a second guide post 32135 inserted in the second spring 32132 are further disposed on the bearing block 32133; the length of the first guiding column 32134 is smaller than the length of the first spring 32131 in the natural state, and the length of the second guiding column 32135 is smaller than the length of the second spring 32132 in the natural state. A first mounting post 32121 for stabilizing the first spring 32131 and a second mounting post 32123 for stabilizing the second spring are further formed in the mounting block 3212; the first mounting post 32121 defines a first guide hole 32122 for engaging the first guide post 32134, and the second mounting post 32123 defines a second guide hole 32124 for engaging the second guide post 32135. A guide groove 32125 for sliding the bearing block 32133 is further formed in the mounting block 3212. Bearing block 32133 also has attachment holes 32136 that are coupled to mounting bracket 322. The mounting rack 322 comprises clamping arms 3221 positioned at two sides of the polishing assembly 321, and a mounting seat 3222 for bearing the clamping arms 3221; the mounting seat 3222 is slidably mounted on the grinding table 323. When polishing the work piece, a plurality of subassemblies 321 that polish remove to the work piece simultaneously, under the effect of elasticity adaptation module 3213, the portion of polishing can laminate more on the surface of work piece, makes the effect of polishing better.

Preferably, the structure of the first grinding device 3 corresponds to the structure of the second grinding device 4.

Preferably, the printing head 1 comprises a feeding port 11, a material conveying section 12 communicated with the feeding port 11, and a discharging section 13 communicated with the material conveying section 12; a preheating pipeline 121 for preheating the raw materials is arranged in the feeding section 12, and a melting pipeline 131 for melting the raw materials is arranged in the discharging section 13; the preheating pipe 121 is communicated with the melting pipe 131; the discharging section 13 has a connecting end 132 communicated with the conveying pipeline and an output end 133 for outputting raw materials; the discharge section 13 is in the shape of a circular truncated cone, and the cross-sectional area of the connecting end 132 gradually decreases to the cross-sectional area of the output end 133. By providing the preheating pipe 121 for preheating the material and the melting pipe 131 for melting the material in the print head 1, the raw material is in a powder state before entering the print head 1, and then passes through the preheating pipe 121 and the melting pipe 131 to be changed into a molten state, and in addition, the preheating pipe 121 is electrically heated, and the melting pipe 131 is heated by ceramic, so that the print head 1 is not easily blocked due to the melting function of the print head 1.

Preferably, a plurality of preheating pipelines 121 are arranged in the feeding section 12 around the central axis of the discharging section 13. Raw materials of different colors can be supplied through a plurality of preheating pipes 121, and the ornamental value of the workpiece is increased.

Preferably, the preheating pipe 121 includes a direct current section 1211 and a confluence section 1212; the straight section 1211 is parallel to the central axis of the discharging section 13, and the converging section 1212 is gradually inclined toward the central axis of the discharging section 13. The raw material is more easily fed into the discharge section 13 through the confluence section 1212.

Preferably, the printhead 1 also includes a pre-melting mechanism 14 for pre-melting the underlying material. When printing the second layer and the profile layer behind the second layer, use the preheating machine who beats on the printer head 1 to preheat the profile layer of last layer earlier, make it soften, and the rethread beats printer head 1 and continues to print, can make between the adjacent profile layer glue more closely reality.

Preferably, the premelting mechanism 14 includes a preheating member 141 for preheating the lower layer of material, and a rotary driving assembly 142 for driving the preheating member 141 to rotate around the central axis of the discharging section 13. The rotary drive assembly 142 includes a bracket 1421 to which the preheat member 141 is mounted; the support 1421 includes a connecting portion rotatably connected to the feeding section 12, and a supporting portion for supporting the preheating member 141; the connecting part is a circular ring sleeved on the material conveying section 12, and the supporting part is fixedly connected to the outer side of the circular ring.

The rotary driving assembly 142 further includes a first gear 1422 fixedly secured to the feeding section 12, and a second gear 1423 located on the supporting portion and engaged with the first gear 1422; and a first motor 1424 for driving the second gear 1423 to rotate. When the print head 1 is printing a workpiece, the printing direction needs to be changed continuously, so the rotary driving assembly 142 drives the preheating member 141 to rotate around the print head 1, so that the preheating member 141 is always kept at the front position of movement.

Preferably, the preheating member 141 includes a connecting section 1411 connected to the connecting portion, and a preheating section 1412 for preheating the lower material, wherein the connecting section 1411 is parallel to the central axis of the discharging section 13, and the preheating section 1412 is inclined toward the discharging section 13. When the preheating section 1412 is inclined toward the discharging section 13, the preheating section 1412 is closer to the discharging section 13, so that the printing head 1 can eject the raw material in time after preheating is completed, and the preheating effect can be better.

Preferably, the printing apparatus further comprises a supply device 2 for supplying the print head 1; the litigation feeding device 2 is provided with a feeding pipe 21 connected with the feeding port 11. The raw material is supplied to the print head 1 by a supply device 2.

An efficient automatic three-dimensional printing method comprises the following steps:

a. constructing a workpiece model;

b. layering the model along the Z direction to generate the section profile information of the workpiece;

c. printing the workpiece layer by layer according to the section profile information by a printing device;

d. and polishing and grinding the printed workpiece.

Preferably, in step (c), the printing device is used to print the workpiece, when printing the first layer, the printing head 1 is directly used to eject the material according to the contour information, when printing the second and subsequent contour layers, the preheating mechanism on the printing head 1 preheats the printed contour of the previous layer, and then the printing head 1 continues to eject and print.

Preferably, in the step (d), the workpiece is roughly ground by using the first grinding device 3, and the workpiece is finely ground by using the second grinding device 4.

The above embodiments and drawings are not intended to limit the form and style of the present invention, and any suitable changes or modifications thereof by those skilled in the art should be considered as not departing from the scope of the present invention.