CN207982312U - The adding set and scratch system of micro mist mixing process additive - Google Patents

Abstract

The utility model is related to a kind of adding set and scratch system of micro mist mixing process additive, which includes：Additive tank, power gas tank, spray gun and control system；Scratch system includes the adding set and milling device, and the two is tightly connected.The adding set and scratch system provided by the utility model of adding can realize the multiple spraying addition of additive, addition state can be improved, at times, it adds by different level to ensure uniformity, powder is set to be uniformly mixed, achieve the purpose that uniform component, reduce and reunite, when having evaded disposable addition the problem of selective oxidation, " oil mark " bad ratio caused by Powder Oxidation, reunion can be greatly reduced, it even is eliminated, and technology is controllable.

Description

The adding set and scratch system of micro mist mixing process additive

Technical field

The utility model is related to a kind of adding sets and scratch system of micro mist mixing process additive, are suitable for sintering Neodymium iron boron or other rare earth permanent-magnet powder powder processes, belong to powdered metallurgical material technical field.

Background technology

The market demand of Nd-Fe-B permanent magnet material and industry size rapidly develop in recent years, and application field is contained All conglomeraties such as modern industry motor, microelectronics motor, new energy motor are covered.But due to NdFeB material manufacturing process Belong to powder metallurgy scope, mixed powder is the key element for influencing NdFeB material performance, on the one hand to promote powder size, ingredient Uniformly, anti-oxidant treatment on the other hand is carried out to powder surface, prevents powder from being aoxidized during follow-up pressing under magnetic field, shadow Ring magnetic property.In prepared by neodymium iron boron powder, generally use airflow milling carries out milling to raw material powder and reaches required granularity, Then additive is added into the powder after airflow milling and carries out mixed powder, in this process, additive disperses unevenness can causing property It can problem and blank " oil mark " bad problem.Currently, the addition manner of most of production firm additive mainly will be after airflow milling Neodymium iron boron powder put into powder tank entirely after additive is disposably added into powder tank manually, major defect is as follows：First, tank mouth Open hour are short, operating difficulties, and part neodymium iron boron powder easily aoxidizes, even if operation is very fast, it is attached to will also result in tank mouth There is partial oxidation in close neodymium iron boron powder, it is difficult to avoid；Second, disposable to add, neodymium iron boron powder is susceptible to local bolus Poly-, stringenter to the requirement of its resting period since antioxidant effect is poor, not easy to store, the powder of reunion is at follow-up batch mixing It is not easy to separate when reason, causes ingredient inhomogenous, while influencing the combination that rear surface coating and matrix is electroplated.Mixed powder is to prepare height One of performance Sintered NdFeB magnet important technology, produce reality require technical staff to explore more preferably adding method and addition dress It sets, improves addition state, improve and mix powder effect, improve magnet performance.

Utility model content

One of the utility model aim is to provide a kind of adding set of micro mist mixing process additive, passes through the dress The spraying addition for realizing additive is set, and can be burnt by automation control additive amount and addition state convenient for preparing high-performance Tie the materials such as neodymium iron boron magnetic body.

The two of the purpose of this utility model are to provide a kind of scratch system including above-mentioned adding set, using the milling System can aoxidize to avoid the neodymium iron boron powder after milling during adding antioxidant, and additive is in adding procedure In be uniformly dispersed, the bad problem such as performance issue and blank " oil mark " will not be caused, and can prevent neodymium iron boron powder occur Part is reunited, and ingredient is uniform, and antioxidant effect is good.

To achieve the above object, the utility model uses following technical scheme：

A kind of adding set of micro mist mixing process additive, including：Additive tank, power gas tank, spray gun and control System；Wherein, the additive tank is connected to by first pipe with the spray gun, and the power gas tank passes through second pipe and institute State spray gun connection；The control system includes：Power supply, time controller, circuit, the first solenoid valve and second solenoid valve are controlled, Wherein, first solenoid valve is set in the first pipe and is connect with the control power supply, and the second solenoid valve is set It is placed on the second pipe and is connect with the control power supply, the time controller passes through circuit and first solenoid valve It is connected with second solenoid valve, for controlling the time interval between each injecting time of the spray gun and adjacent injecting times.

In the adding set of above-mentioned micro mist mixing process additive, described first manage as a preferred implementation manner, Liquid flow valve is additionally provided on road.

In the adding set of above-mentioned micro mist mixing process additive, described second manage as a preferred implementation manner, Gas flow valve is additionally provided on road.

In the adding set of above-mentioned micro mist mixing process additive, the power gas as a preferred implementation manner, Tank is nitrogen gas tank.

In the adding set of above-mentioned micro mist mixing process additive, the additive as a preferred implementation manner, Tank is set to the top of the spray gun, to keep pressure difference with the spray gun, additive is enable to automatically flow into the spray gun In.

In the adding set of above-mentioned micro mist mixing process additive, the spray gun as a preferred implementation manner, Nozzle is towards underface.

In the adding set of above-mentioned micro mist mixing process additive, the additive as a preferred implementation manner, Tank is provided with liquid level alarm, the additive amount for monitoring additive.

A kind of scratch system, including above-mentioned adding set and milling device, wherein the nozzle of the spray gun be built in it is described In milling device tremie pipe or be built in the milling device receipts powder collecting pot top, and the adding set and the mill Powder device is to be tightly connected.

In above-mentioned scratch system, the milling device is air-flow mill apparatus.

In above-mentioned scratch system, the additive is fluid oil lipid mixtures antioxidant.

Compared with prior art, the utility model has the beneficial effects that：

(1) adding set provided by the utility model can realize the multiple spraying addition of additive, can improve addition shape State is added at times, by different level to ensure uniformity, and powder is made to be uniformly mixed, and is achieved the purpose that uniform component, is reduced and reunite, When having evaded disposable addition the problem of selective oxidation, while additive can also be made fully dispersed, uniformly wrap up powder surface, It realizes oxidation resistant effect, extends the holding time of Nd-Fe-B powder.

(2) the disposable adding technology of traditional manual is unstable, exists with personnel's operation technique, resting period, additive amount Association, causes in blank " oil mark " undesirable ratio to differ, process capability cannot control well；And it is new by using this practicality The adding set that type provides, additive is atomized, realizes that layering, spraying addition, Powder Oxidation and agglomeration greatly reduce, Mainly rear surface bad order is sintered by powder compacting to be embodied；Added using adding set provided by the utility model addition Add agent, " oil mark " bad ratio caused by Powder Oxidation, reunion can be greatly reduced and (become 0.2% or less from 2% or more), very To elimination, and technology is controllable.

Description of the drawings

Fig. 1 is using the schematic diagram for disposably adding additivated traditional approach manually；

Fig. 2 is the adding set that the preferred embodiment in the utility model provides or the schematic diagram of scratch system；

Fig. 3 is the structural schematic diagram for the control system that the preferred embodiment in the utility model provides；

Fig. 4 is the schematic diagram of adding set or scratch system that another preferred embodiment of the utility model provides；

Wherein, 1- receipts powder collecting pot, 2- additives, 3- spray gun spray nozzles, 4- additive tanks, 5- control power supplys, 6- power gas tanks, 7- liquid flow valves, 8- gas flow valves, the first solenoid valves of 9-, 10- second solenoid valves, 11- airflow milling tremie pipes.

Specific implementation mode

It is new to this practicality below in conjunction with attached drawing to keep the purpose of this utility model, technical solution and advantage clearer Type embodiment is described in further detail.

The orientation or positional relationship of the instructions such as term "upper", "lower" is based on attached drawing institute in the description of the present invention, The orientation or positional relationship shown is merely for convenience of description the utility model rather than requires the utility model must be with specific Azimuth configuration and operation, therefore should not be understood as limiting the present invention.

It is unstable referring to the disposable addition manner of Fig. 1 traditional manuals, it is equal with personnel's operation technique, resting period, additive amount There are associations, and " oil mark " undesirable ratio is caused in blank to differ, and " oil mark " is mainly caused by Powder Oxidation, reunion, engineering energy Power cannot control well, seriously affect the performance of neodymium iron boron magnetic body.In order to solve the above-mentioned technical problem the utility model, provides A kind of novel adding set, scratch system and adding method comprising the adding set, referring to Fig. 4, Fig. 3 and Fig. 2.Specifically Ground, referring to Fig. 2 and Fig. 3, a kind of adding set of micro mist mixing process additive, including：Additive tank 4, power gas tank 6, Spray gun and control system；Wherein, additive tank 4 is connected to by first pipe with spray gun, and power gas tank 6 passes through second pipe and spray Rifle is connected to；Control system includes：Control power supply, time controller, circuit, the first solenoid valve 9 and second solenoid valve 10, wherein First solenoid valve 9 be set in first pipe and with control power supply 5 connect, second solenoid valve 10 be set on second pipe and with It controls power supply 5 to connect, time controller is connect with the first solenoid valve 9 and second solenoid valve 10 respectively by circuit, for controlling Time interval between each injecting time of spray gun and adjacent injecting times.

Additive tank 4 is connected to spray gun by first pipe (i.e. liquid line), is added wherein being loaded with liquid to be added It can be antioxidant or/and lubricant etc. to add agent, additive.It is anti-oxidant that the adding set of the utility model is particularly suitable for liquid The addition of agent.It is equipped with liquid level alarm in additive tank 4, the total amount of adding for monitoring additive, in adding procedure, when adding When the additive liquid level of agent tank 4 being added to drop to setting position, liquid level alarm alarm, to indicate that the addition metering of additive has reached Set total amount.The actual interpolation total amount of additive mainly depending on the total amount of neodymium iron boron powder, adds according to conventional amount used Agent, the utility model is added not to repeat this.In addition, in order to reduce cost, save the energy, additive tank 4 is set to The top of spray gun, i.e. additive tank 4 are more than spray gun at a distance from ground at a distance from ground, so as to additive tank 4 and spray gun it Between keep pressure difference, to enable additive to automatically flow into spray gun 3.

On the one hand additive total amount can be controlled by liquid level warning, on the other hand can also pass through time interval meter Each additive amount and total injecting times are calculated, to realize and then reach ideal atomizing effect, additive may be implemented closed Addition, avoids the appearance of Powder Oxidation, agglomeration.

Power gas tank 6 is connected to by second pipe (i.e. gas piping) with spray gun, wherein equipped with power is provided for spray gun Gas, the gas are preferably nitrogen.

One end of spray gun is equipped with atomizer (i.e. spray gun spray nozzle 3), and for atomized liquid additive, spray gun is by from the Liquid additive from first pipe is ejected into the powder after grinding by the aerodynamic force of two pipelines.Spray gun spray nozzle 3 is towards just Lower section, the direction and powder after mill for spraying liquid additive move towards identical.

Control system includes：Control power supply 5, time controller, circuit, the first solenoid valve 9 and second solenoid valve 10.First Solenoid valve 9 be set in first pipe and with control power supply 5 connect, second solenoid valve 10 be set on second pipe and with control Power supply 5 connect, time controller (e.g., the time relay is not shown in figure) by circuit respectively with the first solenoid valve 9 and second Solenoid valve 10 connects, for controlling the time interval between each injecting time of spray gun and adjacent injecting times.Using interval The mode effect completeer than the spray of duration that the mode of certain time sprays liquid additive is more preferable, may further ensure that Mixed uniformity, the more conducively dispersion of additive reduce and reunite, and increase antioxidant effect.

For the ease of controlling the flow of liquid additive, it is additionally provided with liquid flow valve 7 in first pipe, adds for controlling Add agent flux size, it is highly preferred that liquid flow valve 7 is set to the first pipe between additive tank 4 and the first solenoid valve 9 On.

For the ease of control pressure, gas flow valve 8 (i.e. pressure regulator valve) is additionally provided on second pipe, for controlling entrance The gas flow of spray gun, it is highly preferred that gas flow valve 8 to be set to second between power gas tank 6 and second solenoid valve 10 On pipeline.

A kind of scratch system, including above-mentioned adding set and milling device, wherein the nozzle 3 of the spray gun is built in milling In device tremie pipe 11 or be built in milling device receipts powder collecting pot 1 top, and the adding set and the milling dress It is set to sealed connection；Preferably, the milling device is air-flow mill apparatus.

Relative to the top for the receipts powder collecting pot 1 that spray gun spray nozzle 3 is set to milling device, spray gun spray nozzle 3 is set to mill It is more convenient, saves trouble in powder device tremie pipe 11, without moving adding set with the movement for receiving powder collecting pot 1, filled as milling The collecting part set-receipts powder collecting pot 1 just needs to unload down from tremie pipe 11 after gathering the powder ground, if by spray gun Nozzle 3 is set to the top of the receipts powder collecting pot 1 of milling device, then after gathering the powder ground, it is necessary to fill addition It sets and is moved with receipts powder collecting pot 1, it is unfavorable to adding set in this way, and spray gun spray nozzle 3 is set in milling device tremie pipe 11 then Powder collecting pot 1 can only being received after gathering the powder ground and being moved to designated position, adding set and milling device are protected It holds motionless.

Adding set should be sealed connection with milling device, can realize adding set and milling device in the following way Sealed connection.The top that spray gun spray nozzle 3 is either set to the receipts powder collecting pot 1 of milling device still sets spray gun spray nozzle 3 Be placed in milling device tremie pipe 11, if receive powder collecting pot 1 top tank skin on or milling device tremie pipe 11 side wall On open up a through-hole, the tail portion of spray gun is passed through into through-hole and is sealed by original papers such as sealing rings, or it is feasible by other Mode by entire spray gun or spray gun spray nozzle be set in milling device tremie pipe 11 or the receipts powder collecting pot 1 of milling device it is upper Portion to realize the sealed connection of adding set and milling device, while not interfering the blanking of powder after mill also as much as possible.Referring to Fig. 2, the embodiment on the top of the receipts powder collecting pot 1 of milling device is set to for spray gun spray nozzle 3, and Fig. 4 is that spray gun spray nozzle 3 is set to Embodiment in milling device tremie pipe 11.Material flows to one in the injection direction and milling equipment tremie pipe of atomizer It causes.Preferably, the angle of atomized spray should be set as the cross section that sprayed additive can be made to cover powder tank.More preferably Ground, the spray gun spray nozzle can be one or more.

A kind of adding method of micro mist mixing process additive, is carried out by above-mentioned scratch system, and the additive is Fluid oil lipid mixtures antioxidant, includes the following steps：

Step 1 is purged inside milling device with nitrogen to reduce oxygen content, to avoid that powder occurs in milling process The oxidation at end will be received powder collecting pot 1 and be docked with the sealing of milling device feed opening；

Step 2, according to milling total time and additive total dosage calculate each injecting time of the adding set and Time interval between adjacent injecting times, and be configured on the time controller；

Time interval between adjacent injecting times be preferably it is described milling total time 1/20th to 30/ One.With the time interval carry out injection can more desirably control additive dispersing uniformity and powder cladding it is uniform Property.

The pressure of injection is preferably 0.3-0.4MPa；The additive flow of each injection is preferably 15-30mL/min.

Multi-injection is carried out under above-mentioned preferred parameter can ensure that the misty liquid droplets granularity of injection is controlled in zone of reasonableness It is interior, while ensureing that all powder being collected into tank touches misty additive, to control addition to the greatest extent The dispersibility of agent in the powder also farthest controls powder reunion and Powder Oxidation, it is possible thereby to by the bad ratio of oil mark Example is greatly reduced and (becomes 0.2% or less from 2% or more), even is eliminated.

Step 3, the time interval that booting milling opens simultaneously adding set to be set according to step 2 is into receipts powder collecting pot Additive spray.Preferably, the time that the milling terminates is the time that last time additive spray terminates.

Powder collecting pot 1 will be received after milling to remove, and is placed on three-dimensional mixed powder machine and is continued mixed powder.

The content of the utility model will be described in further detail by embodiment combination attached drawing below, this practicality is new The protection domain of type is including but not limited to following each embodiments.Specific experiment step or condition person are not specified in embodiment, according to The operation of routine experiment step or condition described in document in the art can carry out.It the powder that is used in embodiment and sets Standby is commercially available.

Embodiment 1

Neodymium iron boron powder 300kg (the performance trades mark that substitution number is 5119：N42), it is divided into two parts of each 150kg of A, B.A Powder is with the dynamic addition additive of conventional method air-flow milling defensive position again with the mixed powder of powder machine is mixed one and a half hours, and B powder is with same Air-flow milling equipment adds the adding set (i.e. the scratch system of the utility model) of the utility model be milled and be milled Doping in journey, booting, which is milled, opens simultaneously adding set, and total milling time of A powder and B powder is 4h, and additive is total Dosage is 3.2L, and the pressure of injection is 0.35MPa；The additive flow of each injection is 16mL/min, is sprayed every 5min It penetrates once, injection is carried out after being milled 5min for the first time, and the time sprayed every time is 20min, is sprayed 10 times altogether, and be milled knot The time of beam is the time that last time additive spray terminates.It is small with the mixed powder one and half of same mixed powder machine after milling When.A, two parts of powder of B, which are pressed into same press after cylinder, is put into same sintering furnace firing diameter 40mm, the cylinder of long 50mm. It is examined after A, B product to be processed into the cake plating of 39mm*5mm respectively.A product oil mark ratios are 3.5%, B products oil mark ratio Example is 0.1%.

Embodiment 2

Neodymium iron boron powder 300kg (the performance trades mark that substitution number is 7312：45H), two parts of each 150kg of A, B are divided into.A Powder is with the dynamic addition additive of conventional method air-flow milling defensive position again with the mixed powder of powder machine is mixed one and a half hours, and B powder is with same Air-flow milling equipment adds the adding set (i.e. the scratch system of the utility model) of the utility model be milled and be milled Doping in journey, booting, which is milled, opens simultaneously adding set, and total milling time of A powder and B powder is 4h, and additive is total Dosage is 3.2L, and the pressure of injection is 0.35MPa；The additive flow of each injection is 20mL/min, is sprayed every 10min It penetrates once, injection is carried out after being milled 10min for the first time, and the time sprayed every time is 20min, is sprayed 8 times altogether, and be milled knot The time of beam is the time that last time additive spray terminates.It is small with the mixed powder one and half of same mixed powder machine after milling When.A, two parts of powder of B are pressed into the side that same sintering furnace firing 55mm*28.5mm*35mm is put into after cylinder with same press Block.It is examined after A, B product to be processed into the square plating of 54mm*27.5mm*3.5mm respectively.A product oil mark ratios are 2.7%, B product oil mark ratio are 0.

Embodiment 3

Substitution number is the neodymium iron boron powder 300kg of B507, is divided into each 150kg (performance trades mark of two parts of A, B：38SH).A Powder is with the dynamic addition additive of conventional method air-flow milling defensive position again with the mixed powder of powder machine is mixed one and a half hours, and B powder is with same Air-flow milling equipment adds the adding set (i.e. the scratch system of the utility model) of the utility model be milled and be milled Doping in journey, booting, which is milled, opens simultaneously adding set, and total milling time of A powder and B powder is 4h, and additive is total Dosage is 3.2L, and the pressure of injection is 0.35MPa；The additive flow of each injection is 26.7mL/min, every 20min Injection is primary, and injection is carried out after being milled 20min for the first time, and the time sprayed every time is 20min, is sprayed 6 times altogether, milling The time of end is the time that last time additive spray terminates.It is small with the mixed powder one and half of same mixed powder machine after milling When.A, two parts of powder of B are pressed into the square that same sintering furnace firing 55mm*48mm*38mm is put into after cylinder with same press. It is examined after A, B product to be processed into the tile plating of R13.9mm*R23.1mm*16mm*23.5mm*3.7mm respectively.A product oil Spot ratio is that 2.9%, B products oil mark ratio is 0.08%.

Embodiment 4

Substitution number is neodymium iron boron powder 300kg (the performance trades mark of B507：38SH), two parts of each 150kg of A, B are divided into.A Powder is with the dynamic addition additive of conventional method air-flow milling defensive position again with the mixed powder of powder machine is mixed one and a half hours, and B powder is with same Air-flow milling equipment adds the adding set (i.e. the scratch system of the utility model) of the utility model be milled and be milled Doping in journey, booting, which is milled, opens simultaneously adding set, and total milling time of A powder and B powder is 4h, and additive is total Dosage is 3.2L, and the pressure of injection is 0.35MPa；The additive flow of each injection is 40mL/min, is sprayed every 20min It penetrates once, injection is carried out after being milled 20min for the first time, and the time sprayed every time is 10min, is sprayed 8 times altogether, and be milled knot The time of beam is the time that last time additive spray terminates.It is small with the mixed powder one and half of same mixed powder machine after milling When.A, two parts of powder of B are pressed into the square that same sintering furnace firing 55mm*48mm*38mm is put into after cylinder with same press. It is examined after A, B product to be processed into the tile plating of R13.9mm*R23.1mm*16mm*23.5mm*3.7mm respectively.A product oil Spot ratio is that 2.9%, B products oil mark ratio is 0.98%.

Claims (10)

1. a kind of adding set of micro mist mixing process additive, which is characterized in that including：Additive tank, power gas tank, spray Rifle and control system；Wherein, the additive tank is connected to by first pipe with the spray gun, and the power gas tank passes through second Pipeline is connected to the spray gun；The control system includes：Control power supply, time controller, circuit, the first solenoid valve and second Solenoid valve, wherein first solenoid valve is set in the first pipe and is connect with the control power supply, second electricity Magnet valve is set on the second pipe and is connect with the control power supply, and the time controller passes through circuit and described first Solenoid valve is connected with second solenoid valve, for controlling the time between each injecting time of the spray gun and adjacent injecting times Interval.

2. the adding set of micro mist mixing process additive according to claim 1, which is characterized in that first pipe Liquid flow valve is additionally provided on road.

3. the adding set of micro mist mixing process additive according to claim 1 or 2, which is characterized in that described It is additionally provided with gas flow valve on two pipelines.

4. the adding set of micro mist mixing process additive according to claim 1, which is characterized in that the power gas Tank is nitrogen gas tank.

5. the adding set of micro mist mixing process additive according to claim 1, which is characterized in that the spray gun Nozzle is towards underface.

6. the adding set of micro mist mixing process additive according to claim 1, which is characterized in that the additive Tank is provided with liquid level alarm, the additive amount for monitoring additive.

7. the adding set of micro mist mixing process additive according to claim 1, which is characterized in that the additive Tank is set to the top of the spray gun, to keep pressure difference with the spray gun, additive is enable to automatically flow into the spray gun In.

8. a kind of scratch system, which is characterized in that including claim 1-7 any one of them adding set and milling device, The nozzle of the wherein described spray gun is built in the milling device tremie pipe or is built in the receipts powder collecting pot of the milling device Top, and the adding set and the milling device are to be tightly connected.

9. scratch system according to claim 8, which is characterized in that the milling device is air-flow mill apparatus.

10. scratch system according to claim 8 or claim 9, which is characterized in that the additive is fluid oil lipid mixtures Antioxidant.