阅读说明：本技术 Sla三维打印工件的自动化清洗方法和系统 (Automatic cleaning method and system for SLA three-dimensional printing workpiece ) 是由 齐攀峰 于 2020-09-15 设计创作，主要内容包括：本发明提供了一种SLA三维打印工件的自动化清洗方法和系统,包括：步骤1：通过风吹工艺去除表面残留树脂；步骤2：采用喷淋工艺进一步清洁工件表面残留树脂；步骤3：采用浸泡工艺,对工件进行彻底清洁；步骤4：采用自动化的物料输送平台,对工件进行从上料到清洁的全过程自动化运输和清洗。本发明通过采用风吹-喷淋-浸泡的组合工艺方法,解决了SLA打印树脂件表面清洗难、自动化程度低的问题,为SLA产品生产过程的自动化实现重要瓶颈上的突破。(The invention provides an automatic cleaning method and system for an SLA three-dimensional printing workpiece, which comprises the following steps: step 1: removing residual resin on the surface by a wind blowing process; step 2: further cleaning residual resin on the surface of the workpiece by adopting a spraying process; and step 3: a soaking process is adopted to thoroughly clean the workpiece; and 4, step 4: and an automatic material conveying platform is adopted to automatically transport and clean the workpieces in the whole process from feeding to cleaning. By adopting the combined process method of blowing, spraying and soaking, the invention solves the problems of difficult surface cleaning and low automation degree of the SLA printing resin piece, and realizes breakthrough on important bottleneck for automation of the production process of the SLA product.)

1. An automatic cleaning method for an SLA three-dimensional printing workpiece is characterized by comprising the following steps:

step 1: removing residual resin on the surface by a wind blowing process;

step 2: further cleaning residual resin on the surface of the workpiece by adopting a spraying process;

and step 3: a soaking process is adopted to thoroughly clean the workpiece;

and 4, step 4: and an automatic material conveying platform is adopted to automatically transport and clean the workpieces in the whole process from feeding to cleaning.

2. The automatic cleaning method for the SLA three-dimensional printing workpieces according to claim 1, wherein the air blowing process comprises the following steps: through 4 high-pressure air pipes with 2mm drift diameters, the surface of the workpiece is blown by wind under the pressure of 0.6MPa, the material conveying platform is reciprocated, and the residual resin on the surface of the workpiece is removed by the wind pressure.

3. The automatic cleaning method for the SLA three-dimensional printing workpieces according to claim 1, wherein the spraying process comprises: A6L/min and 10bar pressure system is used for providing spraying liquid, and the workpieces are subjected to reciprocating full-section spraying cleaning through 4 conical nozzles with 65 degrees.

4. The automated cleaning method for the SLA three-dimensional printing workpieces according to claim 1, wherein the soaking process comprises: the whole workpiece is soaked in an alcohol solvent, the workpiece is driven by a rotating mechanism to rotate forwards and backwards at the rotating speed of 100r/min, and the cleaning time is controlled to clean the inner cavity of the workpiece and the surface of a complex structure.

5. The automatic cleaning method for the SLA three-dimensional printing workpieces as set forth in claim 1, wherein the material conveying platform is horizontally moved, lifted and rotated by a linear module;

through U type hand-basket structure, realize work piece and material conveying platform's separation.

6. An automated cleaning system for SLA three-dimensional printed workpieces, comprising:

module M1: removing residual resin on the surface by a wind blowing process;

module M2: further cleaning residual resin on the surface of the workpiece by adopting a spraying process;

module M3: a soaking process is adopted to thoroughly clean the workpiece;

module M4: and an automatic material conveying platform is adopted to automatically transport and clean the workpieces in the whole process from feeding to cleaning.

7. The automated cleaning system for SLA three-dimensional printed workpieces according to claim 6, wherein the air blowing process comprises: through 4 high-pressure air pipes with 2mm drift diameters, the surface of the workpiece is blown by wind under the pressure of 0.6MPa, the material conveying platform is reciprocated, and the residual resin on the surface of the workpiece is removed by the wind pressure.

8. The automated cleaning system for SLA three-dimensional printed workpieces according to claim 6, wherein the spraying process comprises: A6L/min and 10bar pressure system is used for providing spraying liquid, and the workpieces are subjected to reciprocating full-section spraying cleaning through 4 conical nozzles with 65 degrees.

9. The automated cleaning system for SLA three-dimensional printed workpieces according to claim 6, wherein the soaking process comprises: the whole workpiece is soaked in an alcohol solvent, the workpiece is driven by a rotating mechanism to rotate forwards and backwards at the rotating speed of 100r/min, and the cleaning time is controlled to clean the inner cavity of the workpiece and the surface of a complex structure.

10. The automatic cleaning system for the SLA three-dimensional printing workpieces as set forth in claim 6, wherein the material conveying platform is horizontally moved, lifted and rotated by the linear module;

through U type hand-basket structure, realize work piece and material conveying platform's separation.

Technical Field

The invention relates to the technical field of automatic cleaning, in particular to an automatic cleaning method and system for an SLA three-dimensional printing workpiece.

Background

The 3D printing technology has the advantages of high manufacturing speed, low cost, capability of manufacturing complex parts and capability of eliminating defects in advance. Because the printed workpiece has a complex structure and various forms, the cleaning of the surface of the workpiece is particularly difficult in the post-processing stage, and the conventional ultrasonic equipment and alcohol cleaning scheme is adopted in the industry at present. The automatic degree of the scheme is low, and workers often stand beside the ultrasonic pool and participate in the ultrasonic pool manually, so that the safety risk is high, and the injury to human bodies is serious.

At present, the 3D printing industry mostly adopts a conventional ultrasonic cleaning machine and combines alcohol for use, so that the safety risk is high and the environmental protection pressure is high. Meanwhile, manual intervention is more, and the workers are usually washed by air guns in unclean places, so that the workers are greatly harmed. In addition, the workpiece cleaning process is not accumulated, different sizes and different sizes are solved by manual intervention, and the automation degree is low.

At present, the automatic cleaning industry does not attach importance to the cleaning process of the 3D printing product, no corresponding solution is available, and a basically perfect cleaning solution for the 3D printing industry is provided by combining a large number of basic tests through process exploration.

Patent document CN106694456A (application number: 201510774799.4) discloses an automatic cleaning device for automatically cleaning workpieces, which comprises a manipulator control system, a cleaning tank control system, a safety monitoring system and a PLC control system; the key points of the structure are as follows: the manipulator of the manipulator control system is connected with a material basket, and the cleaning tank control system consists of an ultrasonic cleaning tank, an ultrasonic rinsing tank, a bubbling rinsing tank, an anti-oxidation rinsing tank, a cutting and draining tank and a hot air drying tank; the PLC control system comprises a PLC controller, a man-machine conversation touch screen, a sensor and an alarm device, and is respectively connected with the safety monitoring system, the cleaning tank control system and the manipulator control system.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide an automatic cleaning method and system for an SLA three-dimensional printing workpiece.

The automatic cleaning method for the SLA three-dimensional printing workpiece provided by the invention comprises the following steps:

step 1: removing residual resin on the surface by a wind blowing process;

step 2: further cleaning residual resin on the surface of the workpiece by adopting a spraying process;

and step 3: a soaking process is adopted to thoroughly clean the workpiece;

and 4, step 4: and an automatic material conveying platform is adopted to automatically transport and clean the workpieces in the whole process from feeding to cleaning.

Preferably, the air blowing process comprises: through 4 high-pressure air pipes with 2mm drift diameters, the surface of the workpiece is blown by wind under the pressure of 0.6MPa, the material conveying platform is reciprocated, and the residual resin on the surface of the workpiece is removed by the wind pressure.

Preferably, the spraying process comprises: A6L/min and 10bar pressure system is used for providing spraying liquid, and the workpieces are subjected to reciprocating full-section spraying cleaning through 4 conical nozzles with 65 degrees.

Preferably, the soaking process comprises: the whole workpiece is soaked in an alcohol solvent, the workpiece is driven by a rotating mechanism to rotate forwards and backwards at the rotating speed of 100r/min, and the cleaning time is controlled to clean the inner cavity of the workpiece and the surface of a complex structure.

Preferably, the material conveying platform is horizontally moved, lifted and rotated through the linear module;

through U type hand-basket structure, realize work piece and material conveying platform's separation.

According to the invention, the automatic cleaning system for the SLA three-dimensional printing workpiece comprises:

module M1: removing residual resin on the surface by a wind blowing process;

module M2: further cleaning residual resin on the surface of the workpiece by adopting a spraying process;

module M3: a soaking process is adopted to thoroughly clean the workpiece;

module M4: and an automatic material conveying platform is adopted to automatically transport and clean the workpieces in the whole process from feeding to cleaning.

Preferably, the air blowing process comprises: through 4 high-pressure air pipes with 2mm drift diameters, the surface of the workpiece is blown by wind under the pressure of 0.6MPa, the material conveying platform is reciprocated, and the residual resin on the surface of the workpiece is removed by the wind pressure.

Preferably, the spraying process comprises: A6L/min and 10bar pressure system is used for providing spraying liquid, and the workpieces are subjected to reciprocating full-section spraying cleaning through 4 conical nozzles with 65 degrees.

Preferably, the soaking process comprises: the whole workpiece is soaked in an alcohol solvent, the workpiece is driven by a rotating mechanism to rotate forwards and backwards at the rotating speed of 100r/min, and the cleaning time is controlled to clean the inner cavity of the workpiece and the surface of a complex structure.

Preferably, the material conveying platform is horizontally moved, lifted and rotated through the linear module;

through U type hand-basket structure, realize work piece and material conveying platform's separation.

Compared with the prior art, the invention has the following beneficial effects:

1. the invention adopts a combined process method of blowing, spraying and soaking and combines an automatic driving technology, solves the problems of difficult cleaning and low automation degree of the complex surface of the SLA printing resin piece, and the equipment is a breakthrough of automation and important node process in the SLA three-dimensional printing production process;

2. according to the invention, by adopting a combined process of blowing, spraying and soaking and combining an automatic driving technology, the problems of complicated surface structure, difficult cleaning and low automation degree of a cleaning process of SLA printing resin pieces are solved;

3. the method has high automation degree, simultaneously pays attention to safety and environmental protection, is suitable for popularization and application of SLA three-dimensional printing automatic factory construction, and has wide industrial application prospect.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a flow chart of the operation of an automatic cleaning device for SLA three-dimensional prints;

FIG. 2 is a schematic diagram of the operation of the automatic cleaning equipment for SLA three-dimensional prints;

FIG. 3 is a simple schematic diagram of an automatic cleaning device for SLA three-dimensional prints.

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.

Example 1:

according to the preparation method of the automatic cleaning equipment for the SLA three-dimensional printed matter, which is provided by the invention, the preparation process is shown in figure 1 and comprises the following steps:

step 1: putting workpieces printed by SLA equipment into cleaning equipment integrally or dispersedly;

step 2: selecting a scheme with the workpiece height of more than 200, and after the equipment is started, automatically conveying the workpiece to an air blowing station by the horizontal feeding mechanism;

and step 3: the blowing strategy adopts a large-air-volume mode and repeatedly blows for 8 cycles according to the characteristics of the workpiece, so that 70% of residual resin can be cleaned;

and 4, step 4: sending the workpiece to a spraying station, spraying for 10 seconds in an intermittent spraying mode, and enabling the workpiece to move repeatedly;

and 5: the liquid is attached and washed, the surface of the workpiece can be further cleaned, and the cleanliness can reach the level of 85 percent;

step 6: the workpiece is grabbed by a vertical mechanism and then horizontally moved, and the workpiece is automatically sent into a soaking pool;

and 7: by controlling the flow of the liquid and stirring for 5 minutes, the dead angle position is fully cleaned, and the cleanliness can meet the SLA process requirement;

and 8: grabbing the lifting basket through a vertical mechanism, and conveying the sample to an outlet;

by adopting the method of the comparative example, the workpieces are fully cleaned and the cleanliness can meet the SLA process requirement.

Example 2:

step 1: putting workpieces printed by SLA equipment into cleaning equipment integrally or dispersedly;

step 2: selecting a scheme of workpieces with the height of less than 200mm, and after the equipment is started, automatically conveying the workpieces to an air blowing station by a horizontal feeding mechanism;

and step 3: the wind blowing strategy adopts a medium air flow mode according to the characteristics of the workpiece, automatically adjusts the distance between the air blowing ports to a closer position, and repeatedly blows for 5 cycles, so that 75% of residual resin can be cleaned;

and 4, step 4: sending the workpiece to a spraying station, spraying for 5 seconds in a continuous spraying mode, and enabling the workpiece to move repeatedly;

and 5: the liquid is attached and washed, the surface of the workpiece can be further cleaned, and the cleanliness can reach the level of 90%;

step 6: the workpiece is grabbed by a vertical mechanism and then horizontally moved, and the workpiece is automatically sent into a soaking pool;

and 7: stirring for 4 minutes by controlling the flow of the liquid;

and 8: grabbing the lifting basket through a vertical mechanism, and conveying the sample to an outlet;

by adopting the method of the comparative example, the workpieces are fully cleaned and the cleanliness can meet the SLA process requirement.

Example 3:

according to the invention, the automatic cleaning system for the SLA three-dimensional printing workpiece comprises:

module M1: removing residual resin on the surface by a wind blowing process;

module M2: further cleaning residual resin on the surface of the workpiece by adopting a spraying process;

module M3: a soaking process is adopted to thoroughly clean the workpiece;

module M4: and an automatic material conveying platform is adopted to automatically transport and clean the workpieces in the whole process from feeding to cleaning.

Preferably, the air blowing process comprises: through 4 high-pressure air pipes with 2mm drift diameters, the surface of the workpiece is blown by wind under the pressure of 0.6MPa, the material conveying platform is reciprocated, and the residual resin on the surface of the workpiece is removed by the wind pressure.

Preferably, the spraying process comprises: A6L/min and 10bar pressure system is used for providing spraying liquid, and the workpieces are subjected to reciprocating full-section spraying cleaning through 4 conical nozzles with 65 degrees.

Preferably, the soaking process comprises: the whole workpiece is soaked in an alcohol solvent, the workpiece is driven by a rotating mechanism to rotate forwards and backwards at the rotating speed of 100r/min, and the cleaning time is controlled to clean the inner cavity of the workpiece and the surface of a complex structure.

Preferably, the material conveying platform is horizontally moved, lifted and rotated through the linear module;

through U type hand-basket structure, realize work piece and material conveying platform's separation.

The principle of the preparation method of the automatic cleaning equipment for the SLA three-dimensional printed matter is shown in figure 2, and specifically, the equipment consists of three modules which are respectively as follows:

motion control system and operating software: the system comprises a motion controller, a touch screen integrated industrial personal computer, a PLC (programmable logic controller), a frequency converter, customized and developed process control software and the like;

three cleaning process modules and motion modules: the device consists of a wind blowing process, a spraying process, a soaking process and a movement module;

safety alarm and environmental monitoring system: the device consists of a temperature detection system, an atmosphere concentration detection and exhaust system and an alarm system; the equipment realizes the requirements of full-automatic control, modular design and safety and environmental protection.

As shown in fig. 3, which is a simple schematic diagram of an automated cleaning apparatus for SLA three-dimensional printed products according to the present invention, the following functions are implemented:

A. conveying of the SLA printer screen plate is realized through a special lifting basket;

B. the horizontal movement, the lifting movement and the soaking movement of the sample and the screen plate assembly are realized through the linear module;

C. the special air blowing pipeline and the air blowing nozzle combination scheme which is verified and tested can remove most of resin residues on the surface of the material, and the resin can be recycled to provide the resin utilization rate;

D. the special spray pipeline and the spray nozzle combination scheme which is verified and tested can further clean the resin on the surface of the workpiece which is not easy to clean;

E. through the soaking and cleaning process and the matched thumb wheel mechanism and the matched filtering mechanism, the internal cavity which is difficult to clean is comprehensively cleaned;

F. after cleaning is finished, the basket can be automatically lifted, and the separation of the basket and the workpiece is realized;

G. the integrated environment detection sensor system, the solvent filtering system and the exhaust system are safe and environment-friendly.

In A, the basket design adopts an opening design convenient for placing the screen plate, namely the basket with a mesh structure convenient for placing the sample.

In B, the material conveying adopts the drive of straight line module, high efficiency, high accuracy, is different from conventional chain drive.

And in the step C, the combined scheme of the air blowing pipeline and the air blowing nozzle subjected to verification and test is an innovative application in the SLA cleaning field, and has double values of cleaning, resin recovery and material utilization rate improvement.

In the step D, the combination scheme of the special spraying pipeline and the spraying nozzle after verification and test can realize the cleaning of 85% of the area on the surface of the complex workpiece, and various combination processes can be realized through time and flow control so as to meet the cleaning requirements of workpieces of different materials and different sizes.

And E, the soaking and cleaning process solves the problem of cleaning the complex surface and the internal cavity of the SLA workpiece, adopts a dial wheel stirring cleaning process while soaking, and innovatively applies the traditional process to the SLA cleaning field.

And F, automatically lifting the basket, and separating the basket from the workpiece by adopting a specially designed U-shaped basket structure, so that the basket can be automatically separated from the screen plate. In addition, the mesh baskets are replaced, automatic cleaning of scattered workpieces can be realized, and the mesh basket is suitable for wide application scenes.

In G, through the integrated environment detection sensor system, the solvent filtering system and the exhaust system, the gas concentration detection, the solvent temperature detection, the safety alarm and the gas filtering function are integrated, and the product intellectualization is realized.

The logistics sequence through the components:

1. putting the workpiece into a lifting basket on the horizontal feeding mechanism;

2. the feeding mechanism moves horizontally to reach the position below the air blowing system;

3. completing blowing circulation according to a control scheme;

4. the spraying system moves to adjust the station;

5. completing spraying circulation according to a control scheme;

6. the feeding mechanism conveys the workpiece to the lower part of the vertical moving mechanism;

7. the vertical moving mechanism hooks the lifting basket, and the lifting basket integrally moves and is placed into the soaking and cleaning system;

8. starting a soaking system;

9. after soaking and cleaning are finished, the lifting basket is hooked up by the vertical moving mechanism;

10. the whole body is moved to a discharging system, and the lifting basket is put down to finish cleaning.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

Those skilled in the art will appreciate that, in addition to implementing the systems, apparatus, and various modules thereof provided by the present invention in purely computer readable program code, the same procedures can be implemented entirely by logically programming method steps such that the systems, apparatus, and various modules thereof are provided in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers and the like. Therefore, the system, the device and the modules thereof provided by the present invention can be considered as a hardware component, and the modules included in the system, the device and the modules thereof for implementing various programs can also be considered as structures in the hardware component; modules for performing various functions may also be considered to be both software programs for performing the methods and structures within hardware components.

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.