CN110052972B - Low-temperature abrasive jet machining device with controllable nozzle outlet humidity - Google Patents
Low-temperature abrasive jet machining device with controllable nozzle outlet humidity Download PDFInfo
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- CN110052972B CN110052972B CN201910367752.4A CN201910367752A CN110052972B CN 110052972 B CN110052972 B CN 110052972B CN 201910367752 A CN201910367752 A CN 201910367752A CN 110052972 B CN110052972 B CN 110052972B
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- jet
- abrasive
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- stop valve
- nozzle outlet
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C5/00—Devices or accessories for generating abrasive blasts
- B24C5/02—Blast guns, e.g. for generating high velocity abrasive fluid jets for cutting materials
- B24C5/04—Nozzles therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
- B24C7/0046—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier
- B24C7/0053—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier with control of feed parameters, e.g. feed rate of abrasive material or carrier
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
- B24C7/0046—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier
- B24C7/0053—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier with control of feed parameters, e.g. feed rate of abrasive material or carrier
- B24C7/0061—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier with control of feed parameters, e.g. feed rate of abrasive material or carrier of feed pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
- B24C7/0046—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier
- B24C7/0069—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier with means for preventing clogging of the equipment or for preventing abrasive entering the airway
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
A low-temperature abrasive jet processing device with controllable nozzle outlet humidity comprises an abrasive gas jet generating system, a low-temperature cooling system and a nozzle outlet humidity control system; the abrasive gas jet flow generation system comprises a gas source device capable of generating dry high-speed air jet flow, a stop valve, a jet flow generator, a storage tank, a one-way valve quick-change connector, an abrasive gas jet flow pipeline and a jet flow nozzle; the low-temperature cooling system comprises a pressure gauge, a self-pressurization liquid nitrogen tank, a stop valve and a cooling cylinder; the nozzle outlet humidity control system comprises a pressure gauge, a nitrogen cylinder, a stop valve, a controller, a humidity sensor and a sleeve. The invention can control the humidity of the nozzle outlet and avoid the phenomenon of abrasive blockage caused by icing of the nozzle outlet, thereby continuously and smoothly processing the hydrophobic polymer material by the low-temperature abrasive air jet.
Description
Technical Field
The invention relates to the field of abrasive gas jet processing, in particular to a low-humidity abrasive gas jet technology, and specifically relates to a low-temperature abrasive gas jet processing device with a controllable nozzle outlet humidity.
Background
In recent years, a novel micromachining technique called an air abrasive jet machining technique has been developed, in which a workpiece is machined by accelerating fine abrasive particles with dry compressed air to form an abrasive jet and jetting the abrasive jet onto the surface of the workpiece. The abrasive gas jet processing technology has low cost, can obtain high material removal rate during processing, and has controllable material removal rate. The abrasive gas jet processing technology can be used for processing hard and brittle materials such as glass, ceramics and the like, nonferrous metals and the like.
Ceramic materials are not suitable in some applications due to their limitations. Such as lack of optical transparency of ceramic materials, and their limited biocompatibility, have limited application in biomedicine. Based on this, one has begun to replace ceramic materials with polymeric materials. However, most polymers are hydrophobic materials, and the material removal rate is low when the polymers are processed by the conventional abrasive gas jet and water jet technology. Researches show that the material removal rate is higher when the polymer is subjected to abrasive jet processing at low temperature.
In order to realize effective processing of the polymer at low temperature, the invention patent provides a low-temperature abrasive jet processing device ZL201710017593.6; in order to realize the temperature controllability of the device, the invention patent provides an intelligent temperature-controllable low-temperature abrasive jet processing device, which can cool abrasive jet and a workpiece, wherein the processing temperature range of the workpiece is between-80 ℃ and-190 ℃; in order to realize effective control on low temperature and save cost, the invention patent provides a multi-outlet temperature-controllable abrasive jet cooling device ZL201710747740.5, but the devices have the phenomenon of abrasive blockage caused by icing of the outlet of a nozzle in different degrees in the use process, so that the processing cannot be normally carried out. In order to overcome the defects of the device, the invention provides a low-temperature abrasive gas jet processing device with a controllable nozzle outlet humidity, which can effectively avoid abrasive blockage caused by icing of the nozzle outlet.
Disclosure of Invention
The invention aims to design a low-temperature abrasive gas jet processing device with a controllable nozzle outlet humidity, aiming at the problem that the processing efficiency and quality are affected because a nozzle of the existing low-temperature abrasive gas jet processing device is easy to block.
The technical scheme of the invention is as follows:
a low-temperature abrasive jet processing device with controllable nozzle outlet humidity comprises an abrasive gas jet generating system, a low-temperature cooling system and a nozzle outlet humidity control system; the abrasive gas jet flow generation system comprises a gas source device 1 capable of generating dry high-speed air jet flow, a first stop valve 2, a jet flow generator 3, a storage tank 4, a one-way valve quick-change connector 5, an abrasive gas jet flow pipeline 12 and a jet flow nozzle 10, wherein the gas source device 1 is connected with the jet flow generator 3 through the first stop valve 2, the jet flow generator 3 is connected with the feeding end of the abrasive gas jet flow pipeline 12 through the one-way valve quick-change connector 5, the jet flow nozzle 10 is communicated with the discharging end of the abrasive gas jet flow pipeline 12, and the storage tank 4 is connected with the jet flow generator 3 so as to provide abrasive materials for the storage tank; the low-temperature cooling system comprises a self-pressurization liquid nitrogen tank 7, a second stop valve 8 and a cooling cylinder 11, wherein the self-pressurization liquid nitrogen tank 7 is communicated with the cooling cylinder 11 through the second stop valve 8 and a communication pipeline, and the cooling cylinder 11 is sleeved on an abrasive gas jet flow pipeline 12 so as to keep the abrasive gas jet flow pipeline in the low-temperature state; the nozzle outlet humidity control system is characterized by comprising a nitrogen cylinder 14, a third stop valve 15, a controller 16, a humidity sensor 17 and a sleeve 9, wherein the sleeve 9 is installed on the jet nozzle 10, the humidity sensor 17 is installed at the outlet end of the jet nozzle 10 and connected with the controller 16, the controller 16 controls the opening of the third stop valve 15, the air inlet end of the third stop valve 15 is communicated with the nitrogen cylinder 14, the air outlet end of the third stop valve 15 is communicated with the sleeve 9 through a pipeline, and the humidity of the outlet end of the jet nozzle 10 is adjusted by adjusting the amount of nitrogen entering the sleeve 9.
The self-pressurization liquid nitrogen tank 7 is connected with a first pressure gauge 6.
And the nitrogen cylinder 14 is connected with a second pressure gauge 13.
The air source device 1 capable of generating the drying high-speed air jet flow consists of an air compressor and a dryer, wherein the air compressor generates the high-speed air jet flow, and the high-speed air jet flow enters the dryer and then is dried to form the drying high-speed air jet flow.
The sleeve 9 is connected with the bottom of the nozzle by a quick-change connector.
The distance between the inner wall of the sleeve 9 and the outer wall of the jet nozzle 10 is 0.5-1 mm.
The humidity sensor 17 is a humidity measuring sensor based on an infrared spectrum absorption method.
The invention has the beneficial effects that:
the jet pressure and the abrasive flow of the invention can be adjusted;
2, the jet flow temperature of the invention is accurate and controllable, the error is small, and the influence of temperature fluctuation on the processing effect can be eliminated;
3, the humidity at the outlet of the nozzle is controllable, so that the phenomenon of abrasive material blockage caused by icing at the outlet of the nozzle can be effectively avoided;
4, the system of the invention has simple structure, convenient construction, easy operation and high safety.
The position of the jet flow nozzle is fixed, a workpiece is fixed on a moving platform during machining, and various complex structures are machined by controlling the movement of the workpiece.
6 the invention has small fluctuation range of jet flow parameters in the processing process, no impact influence of liquid nitrogen and high processing precision.
7 the liquid nitrogen is not directly used in the processing process of the scheme II, so that the safety is high.
Drawings
FIG. 1 is a schematic view of the apparatus of the present invention.
Fig. 2 is a schematic view of a nozzle with a sleeve according to the present invention.
In the figure: 1. an air supply device; 2. a first shut-off valve; 3. a jet generator; 4. a material storage tank; 5. a quick-change connector of the one-way valve; 6. a first pressure gauge; 7. a self-pressurizing liquid nitrogen tank; 8. a second stop valve; 9. a sleeve; 10. a jet nozzle; 11. a cooling cylinder; 12. an abrasive gas jet conduit; 13. a second pressure gauge; 14. a nitrogen gas cylinder; 15. a third stop valve; 16. a controller; 17. a humidity sensor.
Detailed Description
The invention is further described below with reference to the figures and examples.
As shown in fig. 1-2.
A low-temperature abrasive jet processing device with controllable nozzle outlet humidity comprises an abrasive gas jet generating system, a low-temperature cooling system and a nozzle outlet humidity control system, as shown in figure 1; abrasive material air jet generating system including can produce dry high-speed air fluidic air supply unit 1, first stop valve 2, efflux generator 3, storage tank 4, check valve quick change coupler 5, abrasive material air jet pipeline 12 and jet nozzle 10, air supply unit 1 comprises air compressor and desicator, and air compressor produces high-speed air jet, forms dry high-speed air jet through drying after getting into the desicator. The air source device 1 is connected with the jet flow generator 3 through the first stop valve 2, the jet flow generator 3 is connected with the feeding end of the abrasive gas jet flow pipeline 12 through the one-way valve quick-change connector 5, the jet flow nozzle 10 is communicated with the discharging end of the abrasive gas jet flow pipeline 12, and the storage tank 4 is connected with the jet flow generator 3 so as to provide abrasive materials for the abrasive gas jet flow pipeline; the low-temperature cooling system comprises a self-pressurization liquid nitrogen tank 7, a second stop valve 8 and a cooling cylinder 11, wherein the self-pressurization liquid nitrogen tank 7 is connected with a first pressure gauge 6. The self-pressurization liquid nitrogen tank 7 is communicated with a cooling cylinder 11 through a second stop valve 8 and a communication pipeline, and the cooling cylinder 11 is sleeved on a grinding material gas jet pipeline 12 so as to keep the grinding material gas jet pipeline in the low-temperature state; the nozzle outlet humidity control system comprises a nitrogen gas bottle 14, a third stop valve 15, a controller 16, a humidity sensor 17 and a sleeve 9, wherein the humidity sensor 17 is a humidity measuring sensor based on an infrared spectrum absorption method, the nitrogen gas bottle 14 is connected with a second pressure gauge 13, the sleeve 9 is installed on the jet nozzle 10, the sleeve 9 is connected with the bottom of the nozzle through a quick-change connector, and the distance between the inner wall of the sleeve 9 and the outer wall of the jet nozzle 10 is 0.5-1mm, as shown in fig. 2. The humidity sensor 17 is installed at the outlet end of the jet nozzle 10 and connected with the controller 16, the controller 16 controls the opening degree of the third stop valve 15, the air inlet end of the third stop valve 15 is communicated with the nitrogen cylinder 14, the air outlet end of the third stop valve 15 is communicated with the sleeve 9 through a pipeline, and the humidity of the outlet end of the jet nozzle 10 is adjusted by adjusting the amount of nitrogen entering the sleeve 9.
The working process of the invention is as follows: dry high-speed air generated by the air source device 1 flows through the first stop valve 2 and enters the flow generator 3 to be mixed with abrasive in the storage tank 4 to form high-speed abrasive gas jet, liquid nitrogen in the self-pressurization liquid nitrogen tank 7 flows through the second stop valve 8 and enters the cooling cylinder 11, the abrasive gas jet pipeline 12 penetrates through the cooling cylinder 11 and is immersed in the liquid nitrogen, high-speed abrasive gas jet generated by the flow generator 3 flows through the check valve quick-change connector 5 and enters the abrasive gas jet pipeline 12, the abrasive gas jet flows through the pipeline 12 and is cooled to low temperature by the liquid nitrogen to form low-temperature abrasive gas jet, the low-temperature abrasive gas jet flows through the jet nozzle 10 and is sprayed to the surface of a workpiece to be processed, and the pressure gauge 6 is used for monitoring the pressure of the self-pressurization. When the humidity sensor 17 detects that the humidity at the outlet of the jet nozzle 10 is greater than a set value, the controller 16 processes the humidity signal and sends an instruction to adjust the opening of the third stop valve 15, so that the flow of nitrogen entering the sleeve is adjusted, the humidity at the outlet of the jet nozzle 10 is controlled, the phenomenon that the outlet of the nozzle is frozen to cause abrasive blocking is avoided, and finally, the low-temperature abrasive gas jet processing of the hydrophobic polymer material can be continuously and smoothly realized.
The parts not involved in the present invention are the same as or can be implemented using the prior art.
Claims (6)
1. A low-temperature abrasive jet processing device with controllable nozzle outlet humidity comprises an abrasive gas jet generating system, a low-temperature cooling system and a nozzle outlet humidity control system; the abrasive gas jet generation system comprises a gas source device (1) capable of generating dry high-speed air jet, a first stop valve (2), a jet generator (3), a storage tank (4), a one-way valve quick-change connector (5), an abrasive gas jet pipeline (12) and a jet nozzle (10), wherein the gas source device (1) is connected with the jet generator (3) through the first stop valve (2), the jet generator (3) is connected with the feeding end of the abrasive gas jet pipeline (12) through the one-way valve quick-change connector (5), the jet nozzle (10) is communicated with the discharging end of the abrasive gas jet pipeline (12), and the storage tank (4) is connected with the jet generator (3) so as to provide abrasive materials for the abrasive gas jet generator; the low-temperature cooling system comprises a self-pressurization liquid nitrogen tank (7), a second stop valve (8) and a cooling cylinder (11), the self-pressurization liquid nitrogen tank (7) is communicated with the cooling cylinder (11) through the second stop valve (8) and a communicating pipeline, and the cooling cylinder (11) is sleeved on the abrasive gas jet pipeline (12) so as to keep the abrasive gas jet pipeline in a low-temperature state; the nozzle outlet humidity control system is characterized by comprising a nitrogen cylinder (14), a third stop valve (15), a controller (16), a humidity sensor (17) and a sleeve (9), wherein the sleeve (9) is installed on the jet nozzle (10), the humidity sensor (17) is installed at the outlet end of the jet nozzle (10) and is connected with the controller (16), the controller (16) controls the opening degree of the third stop valve (15), the air inlet end of the third stop valve (15) is communicated with the nitrogen cylinder (14), the air outlet end of the third stop valve (15) is communicated with the sleeve (9) through a pipeline, and the humidity of the outlet end of the jet nozzle (10) is adjusted by adjusting the amount of nitrogen entering the sleeve (9); the distance between the inner wall of the sleeve (9) and the outer wall of the jet nozzle (10) is 0.5-1 mm.
2. The cryogenic abrasive jet machining device with controllable nozzle outlet humidity according to claim 1, characterized in that the self-pressurizing liquid nitrogen tank (7) is connected with a first pressure gauge (6).
3. The cryogenic abrasive jet machining apparatus with controlled nozzle outlet humidity according to claim 1, characterized in that the nitrogen cylinder (14) is connected to a second pressure gauge (13).
4. The cryogenic abrasive jet machining device with controllable nozzle outlet humidity according to claim 1, characterized in that the air source device (1) capable of generating a drying high-speed air jet is composed of an air compressor and a dryer, wherein the air compressor generates the high-speed air jet, and the high-speed air jet is dried to form the drying high-speed air jet after entering the dryer.
5. The cryogenic abrasive jet machining device with controllable nozzle outlet humidity according to claim 1, characterized in that the sleeve (9) is connected with the nozzle bottom by a quick-change coupling.
6. The cryogenic abrasive jet machining device with controlled nozzle outlet humidity according to claim 1, characterized in that the humidity sensor (17) is a humidity measuring sensor based on infrared absorption spectroscopy.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910367752.4A CN110052972B (en) | 2019-05-05 | 2019-05-05 | Low-temperature abrasive jet machining device with controllable nozzle outlet humidity |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910367752.4A CN110052972B (en) | 2019-05-05 | 2019-05-05 | Low-temperature abrasive jet machining device with controllable nozzle outlet humidity |
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| CN110052972A CN110052972A (en) | 2019-07-26 |
| CN110052972B true CN110052972B (en) | 2021-02-26 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113560061B (en) * | 2020-04-29 | 2023-02-03 | 南京航太机电有限公司 | Temperature-adjustable low-temperature gas spray gun system |
| CN112157597B (en) * | 2020-09-29 | 2022-04-08 | 南京航太机电有限公司 | Low-temperature nitrogen cooling focusing abrasive gas jet machining machine tool |
| CN112140003B (en) * | 2020-09-29 | 2022-04-08 | 南京航太机电有限公司 | Ultra-low temperature micro-abrasive air jet processing device for micro-processing of polymer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9393672B2 (en) * | 2013-10-11 | 2016-07-19 | Graco Minnesota Inc. | Pressure control circuits for blasting systems |
| CN205438251U (en) * | 2016-03-07 | 2016-08-10 | 武汉大学苏州研究院 | Fluidic device of regulation and control abrasive material |
| KR101671765B1 (en) * | 2016-06-20 | 2016-11-02 | (주)에스에스이티 | Wet-type polishing apparatus using compressed air |
| CN106965092B (en) * | 2017-04-17 | 2018-09-07 | 南京航空航天大学 | The intelligent controllable temperature low temperature abradant jet processing unit (plant) of polymer |
| CN206758835U (en) * | 2017-05-18 | 2017-12-15 | 温州泛波激光有限公司 | A kind of semiconductor laser temperature control and humidity conditioner |
| CN109676538B (en) * | 2019-01-22 | 2021-03-16 | 南京航空航天大学 | Low-temperature micro-abrasive gas jet machining machine tool |
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