阅读说明：本技术 一种射流强化装置及方法 (Jet flow strengthening device and method ) 是由 张显程 张平 张成成 涂善东 曾飞 龚从扬 刘怡心 王倚阳 于 2020-12-11 设计创作，主要内容包括：本发明涉及一种射流强化装置及方法,射流装置包括介质存储器、混合腔、喷嘴、升降平台和控制装置；介质存储器内设有多个分隔的存储腔且至少一个存储腔中设有石墨烯,存储腔内设有第一搅拌器,存储腔通过射流通道分别与混合腔相连通；混合腔分别与介质存储器及喷嘴相连,其腔内设有第二搅拌器；所述喷嘴具有中空的内腔并与混合腔相连通,且该喷嘴位于所述升降平台的上方；控制装置分别控制第一搅拌器、第二搅拌器和升降平台的操作。本发明的射流强化装置及方法,可以实现任意液体与石墨烯的混合射流强化,从而使强化后的表面质量和疲劳强度更好；通过控制装置可实现强化的自动控制,提高了强化效率,且操作简单,便于调整与维护。(The invention relates to a jet flow strengthening device and a method, wherein the jet flow device comprises a medium storage, a mixing cavity, a nozzle, a lifting platform and a control device; a plurality of separated storage cavities are arranged in the medium storage, graphene is arranged in at least one storage cavity, a first stirrer is arranged in each storage cavity, and the storage cavities are respectively communicated with the mixing cavity through jet flow channels; the mixing cavity is respectively connected with the medium storage and the nozzle, and a second stirrer is arranged in the cavity; the nozzle is provided with a hollow inner cavity and communicated with the mixing cavity, and is positioned above the lifting platform; the control device respectively controls the operation of the first stirrer, the second stirrer and the lifting platform. The jet flow strengthening device and the method can realize the mixed jet flow strengthening of any liquid and graphene, so that the strengthened surface quality and fatigue strength are better; the control device can realize the automatic control of the strengthening, improves the strengthening efficiency, has simple operation and is convenient for adjustment and maintenance.)

1. A jet flow strengthening device is characterized by comprising a medium storage, a mixing cavity, a nozzle, a lifting platform and a control device;

a plurality of separated storage cavities are arranged in the medium storage, graphene is arranged in at least one storage cavity, a first stirrer is arranged in each storage cavity, and the storage cavities are respectively communicated with the mixing cavity through jet flow channels;

the mixing cavity is respectively connected with the medium storage and the nozzle, and a second stirrer is arranged in the cavity of the mixing cavity;

the nozzle is provided with a hollow inner cavity and is communicated with the mixing cavity, and the nozzle is positioned above the lifting platform;

the control device respectively controls the operation of the first stirrer, the second stirrer and the lifting platform.

2. The jet-intensification device of claim 1, where a seal is provided between adjacent storage chambers.

3. The jet-intensification device of claim 1, where the nozzle is rotatably connected to the mixing chamber.

4. The jet-flow enhancing device of claim 3, wherein the mixing chamber is provided with a support and a rotating shaft rotatably connected with the support, and the nozzle is fixed on the rotating shaft.

5. The jet-strengthening device of claim 4, wherein a servo motor is mounted at one end of the rotating shaft, and the servo motor is connected with the control device.

6. The jet-intensification device of claim 3, where the nozzle is gimbaled to the mixing chamber.

7. The jet-intensification device of claim 1, where the nozzle lumen communicates with the mixing chamber through a flexible hose.

8. The fluidic augmentation device of claim 1, wherein the fluidic channel is a flexible hose.

9. The jet flow reinforcing device according to claim 1, wherein the lifting platform comprises a clamping platform and a cylinder connected with the clamping platform and used for pushing the clamping platform to move, and the cylinder is connected with the control device.

10. The fluidic augmentation device of any one of claims 1-9, wherein the control device is a computer or a programmable logic controller.

11. A method of jet intensification comprising the steps of:

s1: respectively stirring the graphene and the liquid for the first time;

s2: mixing the stirred graphene and the liquid together, and stirring for the second time;

s3: and introducing the stirred mixture of the graphene and the liquid into a nozzle, and spraying the mixture to a processed workpiece by the nozzle to realize jet flow strengthening.

12. The jet peening method of claim 11, wherein the liquid comprises one or more of water, soybean oil, corn oil, peanut oil.

13. The jet peening method of claim 11, wherein the concentration of the graphene in the mixture is 2.5% to 7.5%.

Technical Field

The invention relates to the field of material strengthening, in particular to a jet flow strengthening device and a jet flow strengthening method.

Background

In order to prolong the fatigue life of parts, surface modification technologies such as shot blasting, rolling and laser impact are often adopted to introduce residual compressive stress into the metal surface layer, but the traditional shot blasting is difficult to control the speed, the incident angle and the spraying position of each shot, so that the phenomena of 'under-spraying' and 'over-spraying' are easy to occur, and even 'dead corners' without shot blasting reinforcement are easy to occur. Rolling the corners such as the dovetail of an engine turbine disk is also difficult to achieve due to the restriction of the rollers or balls. Although laser shock can strengthen any irradiated position, large-scale engineering application is limited due to problems of cost, efficiency, stability and the like.

Therefore, there is a need for a new and efficient surface modifying device for reinforcing a complicated and narrow area such as a tenon root and a deep hole.

Disclosure of Invention

The invention provides a jet flow strengthening device and a jet flow strengthening method, which aim to solve the technical problem that complicated narrow areas such as tenon roots, deep holes and the like cannot be strengthened efficiently and cheaply in the prior art.

In one aspect, the present invention provides a jet-strengthening device, comprising:

the device comprises a medium storage, a mixing cavity, a nozzle, a lifting platform and a control device;

a plurality of separated storage cavities are arranged in the medium storage, graphene is arranged in at least one storage cavity, a first stirrer is arranged in each storage cavity, and the storage cavities are respectively communicated with the mixing cavity through jet flow channels;

the mixing cavity is respectively connected with the medium storage and the nozzle, and a second stirrer is arranged in the cavity of the mixing cavity;

the nozzle is provided with a hollow inner cavity and is communicated with the mixing cavity, and the nozzle is positioned above the lifting platform;

the control device respectively controls the operation of the first stirrer, the second stirrer and the lifting platform.

Further, a seal is provided between adjacent storage chambers.

Further, the nozzle is rotatably connected to the mixing chamber.

Furthermore, a support and a rotating shaft which is rotatably connected with the support are arranged on the mixing cavity, and the nozzle is fixed on the rotating shaft.

Furthermore, a servo motor is installed at one end of the rotating shaft and connected with the control device.

Further, the nozzle and the mixing cavity are connected by a universal joint.

Further, the inner cavity of the nozzle is communicated with the mixing cavity through a flexible hose.

Further, the fluidic channel is a flexible hose.

Furthermore, the lifting platform comprises a clamping platform and an air cylinder which is connected with the clamping platform and pushes the clamping platform to act, and the air cylinder is connected with the control device.

Further, the control device is a computer or a programmable logic controller.

In another aspect, the present invention provides a jet strengthening method, including the steps of:

s1: respectively stirring the graphene and the liquid for the first time;

s2: mixing the stirred graphene and the liquid together, and stirring for the second time;

s3: and introducing the stirred mixture of the graphene and the liquid into a nozzle, and spraying the mixture to a processed workpiece by the nozzle to realize jet flow strengthening.

Further, the liquid comprises one or more of water, soybean oil, corn oil, peanut oil.

Further, the concentration of the graphene in the mixture is 2.5% -7.5%.

The jet flow strengthening device and the method can realize multi-degree-of-freedom jet flow strengthening, and the mixed jet flow strengthening of any liquid and graphene is realized, and the jet flow channel adopts a flexible pipe with high flexibility, so that the turbulent flow formation of the jet flow can be enhanced, and the strengthened surface quality and the fatigue strength are better; the whole strengthening process is clamped once and repeatedly used, the jet nozzle is convenient and quick to replace, the strengthening automatic control can be realized through the control device, the strengthening efficiency is improved by more than 100 times, the strengthening effect is improved by more than 2 times, and the operation is simple, and the adjustment and the maintenance are convenient.

Drawings

FIG. 1 is a schematic structural diagram of a jet-strengthening device according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a media storage of a jet strengthening device according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a nozzle and a bracket of the jet-strengthening device according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a lifting platform of the jet flow strengthening device provided in the embodiment of the present invention;

FIG. 5 is a flow chart of a jet strengthening method according to another embodiment of the present invention;

FIGS. 6 a-6 f are respectively elastic stress strain resistant clouds illustrating the control and simulation scenarios 1-5 at a penetration angle of 0 deg.;

fig. 7 a-7 f are respectively elastic stress strain resistant cloud plots for the control and simulation scenarios 1-5 at a penetration angle of 20 °.

Reference numerals:

1-a media storage;

11-a storage chamber;

12-a first stirrer;

2-a jet channel;

3-a mixing chamber;

31-a second stirrer;

4-a nozzle;

5-a bracket;

6-a rotating shaft;

7-lifting the platform;

71-a clamping platform;

72-a cylinder;

8-control device.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Example one

As shown in fig. 1 and 2, an embodiment of the present invention provides a jet flow strengthening device, which includes a medium storage 1, a mixing chamber 3, a nozzle 4, a lifting platform 7, and a control device 8, wherein a plurality of separated storage chambers 11 are provided in the medium storage 1, and are used for storing graphene and different types of liquids, and a first stirrer 12 is provided in each storage chamber 11, and is used for stirring the graphene or the liquids in the storage chamber 11 and spraying the graphene or the liquids at a certain pressure and speed; the storage cavity 11 is communicated with the mixing cavity 3 through the jet flow channel 2, graphene and liquid in the storage cavity 11 are sprayed into the mixing cavity 3 to be mixed, and a second stirrer 31 is arranged in the mixing cavity 3 and used for stirring the mixture of the graphene and the liquid and spraying the mixture at a certain pressure and speed; the nozzle 4 is rotatably connected with the mixing cavity 3 and is positioned above the lifting platform 7, the nozzle 4 is hollow inside, and the inside of the nozzle 4 isThe cavity is communicated with the mixing cavity 3, a processed workpiece is arranged on the lifting platform 7 and can move up and down along with the lifting platform 7, the mixture in the mixing cavity 3 is fully stirred and then is sprayed to the processed workpiece through the nozzle 4 to complete jet flow strengthening of the processed workpiece, and the nozzle 4 can rotate freely, so that the spraying position and the incident angle of the jet flow can be conveniently controlled, and strengthening of parts such as a tenon root, a deep hole and the like which are narrow in area and complex in structure can be completed; the control device 8 is respectively connected with the first stirrer 12, the second stirrer 31 and the lifting platform 7, and is used for controlling the viscosity, pressure and speed of the graphene, the liquid and the mixture thereof and the lifting of the lifting platform 7. Wherein the viscosity ranges of the graphene, the liquid and the mixture thereof are: 1.01X 10^-3Pa·s～1.25×10^-3Pa · s, preferably 1.12X 10^-3Pa · s; the pressure range is as follows: 100-350 MPa, preferably 275 MPa; the speed range is 3L/min-5L/min, preferably 4.2L/min.

Can set up the sealing member between two adjacent storage chamber 11, realize sealedly, prevent that different kinds of liquid and graphite alkene from mixing before not stirring, influencing the proportion of each composition in the mixed liquid to influence the effect that the efflux is reinforceed.

The jet flow channel 3 can adopt a flexible hose, and the storage cavity 11 is communicated with the mixing cavity 3 through the flexible hose, so that the turbulent flow formation of jet flow can be enhanced, and the enhancing effect is better.

As shown in fig. 1 and 3, the nozzle 4 and the mixing chamber 3 can be rotatably connected through a bracket 5 and a rotating shaft 6, specifically, one end of the bracket 5 is fixed on the mixing chamber 3, the other end is pivotally connected with the rotating shaft 6, the nozzle 4 is fixed on the rotating shaft 6, and the rotating shaft 6 drives the nozzle 4 to freely rotate on the bracket 5.

The support 5 can be provided with a cavity which is communicated with the mixing cavity 3, the nozzle 4 is communicated with the cavity through a flexible hose, so that the nozzle 4 is communicated with the mixing cavity 3, the nozzle 4 can be always communicated with the mixing cavity 3 in the rotating process, and the mixture in the mixing cavity 3 can be sprayed out at any angle.

It should be noted that the nozzle 4 may also communicate with the mixing chamber 3 in other ways, for example directly with the mixing chamber 3 via a flexible hose, without limiting the invention thereto.

One end of the rotating shaft 6 can be provided with a servo motor for driving the rotating shaft 6 to rotate; the servo motor is connected with the control device 8, so that the rotation angle of the rotating shaft 6 is controlled.

In a possible embodiment, a universal joint connection between the nozzle 4 and the mixing chamber 3 can be used, so that a rotational connection is achieved.

As shown in fig. 4, the lifting platform 7 includes a clamping platform 71 and an air cylinder 72, the workpiece 71 is fixedly mounted on the clamping platform 71, one end of the air cylinder 72 is connected to the clamping platform 71, and the clamping platform 71 is driven by the extension and contraction of the air cylinder 72 to move up and down, so that the processing is more convenient.

The air cylinder 72 can be connected with the control device 8, and the expansion and contraction of the air cylinder 72 are controlled by the control device 8, so that the position of the processed workpiece is automatically controlled, the processed workpiece is matched with the nozzle 4, and the processing efficiency is further improved.

The control device 8 can be a computer or a programmable logic controller and has a man-machine interface, and preset control programs including the types and viscosities of the liquids, the ratio of the mixture, the viscosity, the pressure and the speed, the spraying angle, the motion track of the lifting platform and the like are input through the man-machine interface, so that the automatic strengthening of the processed workpiece is realized.

The jet flow strengthening device provided by the embodiment of the invention can realize single liquid jet flow strengthening, single liquid and graphene mixed jet flow strengthening or mixed jet flow strengthening of multiple liquids and graphene, and can realize automatic control in the processing process. The liquid includes water, soybean oil, corn oil, peanut oil, and the like. The use method of the jet flow strengthening device is described below by taking a single liquid and graphene mixed jet flow and two liquid and graphene mixed jet flows as examples.

When the single liquid and graphene mixed jet flow is strengthened, firstly, a workpiece to be processed is installed on a lifting platform 7, then, liquid such as water, soybean oil, corn oil and peanut oil and graphene are respectively placed in different storage cavities 11, one of the liquid is selected according to a jet flow scheme, the liquid and the graphene are respectively stirred, a first stirrer 12 can detect the viscosity of the liquid and the graphene in real time, when the preset viscosity is reached, the liquid and the graphene are sprayed into a mixing cavity 3 according to a certain ratio, and the specific ratio can be selected according to needs; and then stirring the mixture, detecting the viscosity of the mixture in real time by the second stirrer 12, and spraying the mixture to the surface of a processed workpiece through the nozzle 4 when the preset viscosity is reached so as to realize jet flow strengthening, wherein the nozzle 4 and the lifting platform 7 can freely rotate and move in the strengthening process so as to strengthen complex curved surfaces such as tenon roots and deep holes.

When the mixed jet flow of the two kinds of liquid and the graphene is strengthened, firstly, a processed workpiece is installed on a lifting platform 7, then the liquid such as water, soybean oil, corn oil and peanut oil and the graphene are respectively placed in different storage cavities 11, two kinds of liquid are selected according to a jet flow scheme, the two kinds of selected liquid and the graphene are respectively stirred, a first stirrer 12 can detect the viscosity of the two kinds of liquid and the graphene in real time, when the preset viscosity is reached, the two kinds of selected liquid and the graphene are sprayed into a mixing cavity 3 according to a preset ratio, and the specific ratio can be selected according to needs; and then stirring the mixture, detecting the viscosity of the mixture in real time by the second stirrer 12, and spraying the mixture to the surface of a processed workpiece through the nozzle 4 when the preset viscosity is reached so as to realize jet flow strengthening, wherein the nozzle 4 and the lifting platform 7 can freely rotate and move in the strengthening process so as to strengthen complex curved surfaces such as tenon roots and deep holes.

Since different liquids have different physical properties and physical properties of a mixture of the liquid and graphene are different, the specific type of the liquid can be selected according to actual needs, and the invention is not limited thereto.

Through mixing into graphite alkene in efflux liquid, because graphite alkene has good self-lubricity, can form better protection on the efflux surface to when strengthening the surface of work piece, form one deck protection film on the surface of work piece, make the surface quality after being strengthened better. The concentration range of graphene in the jet liquid is 2.5% -7.5%, and the optimal concentration is 5.25%.

The jet flow strengthening device provided by the embodiment of the invention can realize multi-degree-of-freedom jet flow strengthening, and can strengthen the turbulent flow formation of jet flow by adopting a high-flexibility hose for a jet flow channel through the mixed jet flow strengthening of any liquid and graphene, so that the strengthened surface quality and fatigue strength are better; the whole strengthening process is clamped once and repeatedly used, the jet nozzle is convenient and quick to replace, the strengthening automatic control can be realized through the control device, the strengthening efficiency is improved by more than 100 times, the strengthening effect is improved by more than 2 times, and the operation is simple, and the adjustment and the maintenance are convenient.

Example two

As shown in fig. 5, the present embodiment provides a jet strengthening method, including the following steps:

s1: the graphene and the liquid are stirred for the first time respectively.

Graphene and liquid can be stirred in different stirring chambers respectively, the viscosity of the graphene and the liquid needs to be detected in real time in the stirring process, and after the viscosity reaches the preset viscosity, the first stirring is completed.

S2: and mixing the stirred graphene and the liquid together, and stirring for the second time.

Graphene and liquid need mix according to certain ratio, and specific numerical value can be selected according to actual conditions by oneself, and the mixture can be located another teeter chamber, need the viscosity of real-time detection mixture in the stirring process of the second time, reaches and predetermines behind the viscosity, and the stirring of second time is accomplished.

S3: and introducing the stirred mixture of the graphene and the liquid into a nozzle, and spraying the mixture to a processed workpiece by the nozzle to realize jet flow strengthening.

The spraying pressure and speed of the mixture need to be controlled within a preset range, and can be realized by a pump and other devices, and the nozzle can be arranged to be movable, so that spraying at different angles can be realized.

The liquid may be one or more of water, soybean oil, corn oil, peanut oil, and the like, and may be selected according to the actual situation, which is not limited in the present invention.

The jet flow strengthening method in the embodiment can be realized by the jet flow strengthening device in the first embodiment, which is specifically described as follows:

when the single liquid and graphene mixed jet flow is strengthened, firstly, a workpiece to be processed is installed on a lifting platform 7, then, liquid such as water, soybean oil, corn oil and peanut oil and graphene are respectively placed in different storage cavities 11, one of the liquid is selected according to a jet flow scheme, the liquid and the graphene are respectively stirred, a first stirrer 12 can detect the viscosity of the liquid and the graphene in real time, when the preset viscosity is reached, the liquid and the graphene are sprayed into a mixing cavity 3 according to a certain ratio, and the specific ratio can be selected according to needs; and then stirring the mixture, detecting the viscosity of the mixture in real time by the second stirrer 12, and spraying the mixture to the surface of a processed workpiece through the nozzle 4 when the preset viscosity is reached so as to realize jet flow strengthening, wherein the nozzle 4 and the lifting platform 7 can freely rotate and move in the strengthening process so as to strengthen complex curved surfaces such as tenon roots and deep holes.

When the mixed jet flow of the two kinds of liquid and the graphene is strengthened, firstly, a processed workpiece is installed on a lifting platform 7, then the liquid such as water, soybean oil, corn oil and peanut oil and the graphene are respectively placed in different storage cavities 11, two kinds of liquid are selected according to a jet flow scheme, the two kinds of selected liquid and the graphene are respectively stirred, a first stirrer 12 can detect the viscosity of the two kinds of liquid and the graphene in real time, when the preset viscosity is reached, the two kinds of selected liquid and the graphene are sprayed into a mixing cavity 3 according to a preset ratio, and the specific ratio can be selected according to needs; and then stirring the mixture, detecting the viscosity of the mixture in real time by the second stirrer 12, and spraying the mixture to the surface of a processed workpiece through the nozzle 4 when the preset viscosity is reached so as to realize jet flow strengthening, wherein the nozzle 4 and the lifting platform 7 can freely rotate and move in the strengthening process so as to strengthen complex curved surfaces such as tenon roots and deep holes.

In the strengthening process, the selection of the jet flow scheme, the control of the viscosity, the movement of the nozzle 4 and the lifting platform 7 and the like are all realized through the control device 8, and programs can be preset and input into the control device 8 to realize automatic strengthening.

According to the jet strengthening method provided by the embodiment, the graphene is mixed into the jet liquid, so that a layer of protective film can be formed on the surface of the workpiece when the surface of the workpiece is strengthened, and the strengthened surface quality is better.

The 2219 aluminum alloy is taken as a research object, the surface of the 2219 aluminum alloy is strengthened based on different jet flow schemes by braking, and an elastic impact resistance simulation test is carried out on the strengthened 2219 aluminum alloy plate to verify the strengthening effect. Specific jet simulation protocols are shown in table 1, with protocols 1-5 in table 1 being run at penetration angles of 0 ° and 20 °, respectively.

TABLE 1

In order to verify the strengthening effect of the jet strengthening method of the embodiment, 2219 aluminum alloy plates subjected to ultrasonic rolling strengthening are selected to be subjected to an elastic impact resistance simulation test for comparison, and the test is named as a control group.

As shown in fig. 6 a-6 f and 7 a-7 f, fig. 6a and 7a are anti-elastic stress strain clouds of the control group, fig. 6 b-6 f and 7 b-7 f are elastic stress strain resistant cloud plots for case 1-case 5 at penetration angles of 0 deg. and 20 deg., respectively, from fig. 6a it can be seen that the drill bit penetrates the sheet, in the remaining figures, the penetration is less and less, which indicates that the plate has better and better elasticity resistance, so that the results of the elasticity resistance analysis show that the stress and the strain of the schemes 1 to 5 are less, and the stress and the strain of the scheme 5 are the smallest, therefore, the 2219 aluminum alloy plate reinforced by the jet flow reinforcing method of mixing the graphene and the liquid has better elasticity resistance, the plate reinforced by peanut oil/corn oil/graphene mixed jet flow has the best elasticity resistance.

The above embodiments are merely preferred embodiments of the present invention, which are not intended to limit the scope of the present invention, and various changes may be made in the above embodiments of the present invention. All simple and equivalent changes and modifications made according to the claims and the content of the specification of the present application fall within the scope of the claims of the present patent application. The invention has not been described in detail in order to avoid obscuring the invention.