CN107000164A - The impeller blasting method of casting - Google Patents
The impeller blasting method of casting Download PDFInfo
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- CN107000164A CN107000164A CN201680003840.0A CN201680003840A CN107000164A CN 107000164 A CN107000164 A CN 107000164A CN 201680003840 A CN201680003840 A CN 201680003840A CN 107000164 A CN107000164 A CN 107000164A
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- China
- Prior art keywords
- particle diameter
- projection
- plastochondria
- projection material
- impeller blasting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D31/00—Cutting-off surplus material, e.g. gates; Cleaning and working on castings
- B22D31/002—Cleaning, working on castings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C11/00—Selection of abrasive materials or additives for abrasive blasts
-
- 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)
- Cleaning In General (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A kind of impeller blasting method of casting, it is will to project the impeller blasting method that material is projeced into the surface of casting using sand blasting unit, projection material is that Vickers hardness (JIS Z 2244) is the projection material in the range of HV300~600, projection material after the operation admixture formation process for the operation admixture that the particle diameter distribution for projecting material is stabilized into constant particle diameter distribution is formed by the operation of sand blasting unit is divided into the first plastochondria that particle diameter exceedes 1.18mm, particle diameter is below 1.18mm and the second plastochondria more than 0.85mm, and particle diameter be below 0.85mm three plastochondrias when, the particle diameter distribution of projection material after the operation admixture formation process meets the ratio of the plastochondria of the ratio of the plastochondria of ratio >=second of the first plastochondria >=the 3rd, the projection material for projecting the particle diameter distribution carries out impeller blasting.
Description
Technical field
The present invention relates to a kind of impeller blasting method, this method is attached to casting after entering to be about to casting by blasting treatment
The impeller blasting that the scales (scale) such as the molding sand on surface, the rust for being formed at mother metal surface are removed.
Background technology
In the past, in order to enter to be about to for casting casting after be attached to the squamas such as the molding sand on surface, the rust for being formed at mother metal surface
The impeller blasting that piece is removed, and enter to be about to the bead that hard particles are projeced into casting.The impeller blasting of such casting is more
Carried out (for example, referring to patent document 1) using the spherical particle of iron and steel material quality.
In addition, in the operation of sand blasting unit, the projection material of ormal weight being put into sand blasting unit, the throwing of casting is carried out
When ball is cleared up, the circulation of projection, recovery, the removal of fine powder, projection is repeated for projection material.If projection is repeated,
Then projection material is crushed and turns into fine powder, but the separated device of such fine powder is picked out and is removed.Due in sand blasting unit
Projection quantity of material reduce removed amount, so to feed it is corresponding with decrement project material, if but being repeated throwing
The supply, crushing, the discharge to outside device of material are penetrated, then the particle diameter distribution of the projection material in device stabilizes to the particle diameter with initial stage
The different constant particle diameter distribution of distribution.The state of the particle diameter distribution of the stabilization is referred to as operation admixture (Operating
mix).Shown in non-patent literature 1 the operation admixture of the impeller blasting of casting formed after recommendation particle diameter distribution.
Patent document 1：Japanese Unexamined Patent Publication 6-297132 publications
Non-patent literature 1：“ECONOMICAL AND FUNCTIONAL ASPECTS OF BLAST CLEANING
ABRASIVES BLASTING THEORY " (WHEEL ABRATOR companies issue, 1972)
Casting before knockout, the molding sand layer as relatively thicker fragile material is formed with most top layer, in its lower floor's shape
Layer is mixed into having scale layer, scale and mother metal.In order to efficiently remove these layers, it is necessary to using with larger impeller blasting power
And the higher impeller blasting method of impeller blasting efficiency.In addition, in order to efficiently carry out the impeller blasting of casting, it is necessary to carry out
Manage so that operation admixture formed after device in projection material particle diameter distribution be adapted to impeller blasting condition.
But, the projection material used in the impeller blasting of casting is typically also used for deburring, improves surface roughness etc.
Other purposes.Therefore, although correspondingly can suitably select particle diameter and hardness with purposes, but can not find specifically designed for casting
Impeller blasting and have adjusted the projection material of particle diameter distribution etc..In addition, showing the impeller blasting of casting in non-patent literature 1
Operation admixture formed after recommendation particle diameter distribution, but needed to use with bigger impeller blasting power and ball blast is clear
The impeller blasting method of the more efficient projection material of reason.
The content of the invention
In the art, expect to provide a kind of while improving the casting of impeller blasting power and impeller blasting efficiency
Impeller blasting method.
To achieve these goals, the impeller blasting method involved by one aspect of the present invention is to utilize sand blasting unit will
Projection material is projeced into the impeller blasting method on the surface of casting, possesses：Mixture process is projected, will not in the process
The projection mixture used is to sand blasting unit, and projection material is that Vickers hardness (Japanese Industrial Standards that is, JIS Z 2244) is
The projection material of the scope of HV300~600；Admixture formation process is operated, in the process, passes through the operation of sand blasting unit
Form the operation admixture that the particle diameter distribution for projecting material is stabilized to constant particle diameter distribution；And impeller blasting process,
In the process, by the surface for operating the projection material after admixture formation process to be projected to casting, operation is being mixed into shape
Projection material after state formation process is divided into first plastochondria of the particle diameter more than 1.18mm, particle diameter and is below 1.18mm and exceedes
When 0.85mm the second plastochondria and particle diameter is below 0.85mm three plastochondria, the throwing after operation admixture formation process
The particle diameter distribution for penetrating material meets (ratio of the first plastochondria) >=(ratio of the second plastochondria) >=(ratio of the 3rd plastochondria).With
Under, the symbol with JIS is Japanese Industrial Standards.
Impeller blasting method involved according to an aspect of the present invention, will operate the throwing after admixture formation process
The particle diameter distribution for penetrating material is formed as feature distribution：Largely containing the first larger plastochondria of impeller blasting power, in order to ensure
Coverage rate and be only second to the first plastochondria includes the second plastochondria more, and reduce the 3rd relatively low plastochondria of impeller blasting power.Thus, should
Impeller blasting method can be improved impeller blasting power using the first plastochondria and shorten the impeller blasting time, can utilize second
Body ensures coverage rate, therefore, it is possible to realize while improving the impeller blasting side of the casting of impeller blasting power and impeller blasting efficiency
Method.
In impeller blasting method, it can also be formed as：The ratio of first plastochondria is more than 60 weight %, the second plastochondria
Ratio is 5~30 weight %, and the ratio of the 3rd plastochondria is below 20 weight %.The device after admixture formation process will be operated
The particle diameter distribution of interior projection material is formed as particle diameter distribution as described above, thus, as make the ratio of the first plastochondria with it is existing
The particle diameter distribution of recommendation is adapted ensure that the particle diameter distribution of coverage rate compared to the ratio of significantly increase and the second plastochondria.Therefore,
The impeller blasting method, which can be formed, to be adapted to while improving the impeller blasting of the casting of impeller blasting power and impeller blasting efficiency
Particle diameter distribution.
It can also be formed as：Untapped projection material is the mixture of the first projection material and the second projection material, its
In, the particle diameter d of the first projection material is 1.18mm ＜ d≤2.36mm and frequency is in particle size interval 1.70mm ＜ d≤2.00mm
Maximum, particle diameter d of the second projection material for 0.85mm ＜ d≤1.40mm and frequency particle size interval 1.18mm ＜ d≤
1.40mm it is maximum.So, projection material can by improved being adjusted impeller blasting power first projection material and by
Adjust and be made with improving the second projection material mixing of coverage rate.
According to each aspect of the present invention, impeller blasting power and impeller blasting efficiency can be improved simultaneously.
Brief description of the drawings
Fig. 1 is the explanation of an example of sand blasting unit for representing to use in the impeller blasting method involved by embodiment
Figure.
Fig. 2 is the explanation figure for the process for representing the impeller blasting method involved by embodiment.
Fig. 3 is the explanation figure for representing to form the process for operating admixture.
Fig. 4 is the explanation figure for the change for representing to operate the particle diameter distribution in the forming process of admixture.
Fig. 5 is the projection material as the example that can be used in the impeller blasting method involved by embodiment
Particle diameter distribution schematic diagram.
Fig. 6 is the figure illustrated for result obtained by having investigated influence of the particle diameter to derusting degree.
Fig. 7 is the explanation figure of the particle diameter distribution for the projection material for representing embodiment.
Fig. 8 is the explanation figure for the surface state for representing the sample after impeller blasting experiment.
Fig. 9 is the table illustrated to the surface state shown in Fig. 8.
Figure 10 is the explanation figure of the measurement result for the derusting degree for representing the sample after impeller blasting experiment.
Embodiment
The impeller blasting method involved by embodiment is illustrated referring to the drawings.The impeller blasting of cast(ing) surface is logical
Cross to project material using sand blasting unit and be projeced into cast(ing) surface and carry out.As such sand blasting unit, Fig. 1 can be used
Shown centrifugal type sand blasting unit.Fig. 1 is the sand blasting unit for representing to use in the impeller blasting method involved by embodiment
The explanation figure of one example.In addition, the impeller blasting method of present embodiment is not limited to use the side of the sand blasting unit
Method.
Sand blasting unit 1 possesses storage and weight feed projects the hopper 11 of material, the impeller 12 of projection projection material, made
Project the EGR that is, bucket elevator 13 of material circulation, separate projection material with sand, scale (mainly iron oxide)
Separator 14, dust arrester 15, projection chamber 16 and control device (not shown).
Hopper 11 possesses the reservoir 11a of storage projection material and is arranged at reservoir 11a bottoms and is used to throw
Material weight feed is penetrated to the gate 11b that dams of impeller 12.The gate 11b that dams is configured to variable open area, can will be constant
The projection material of amount is supplied to impeller 12.
Impeller 12 using rotation blade to from hopper 11 supply come projection material accelerate, and by the projection material
Workpiece (the being in the present embodiment casting) projection for the workpiece mounting table 17 being arranged on to being placed in projection chamber 16.Thus,
Impeller blasting is carried out to casting.The rotating mechanism such as motor 17a is connected with workpiece mounting table 17.Thus, sand blasting unit 1 being capable of side
Workpiece is set to rotate side to the overall projection material of workpiece.
Bucket elevator 13 is set to be connected to projection chamber 16.Projection chamber 16 possesses inclined towards bucket elevator 13
Inclined plane.Projection material, the sand, the scale that are removed from casting after impeller blasting processing etc. (hereinafter referred to as " project material
Deng ") guided to bucket elevator 13.Bucket elevator 13 conveys the projection material etc. to the top of sand blasting unit 1, and supplies
To separator 14.It is configured between bucket elevator 13 and separator 14 and rocks metal portion (Panting metal) 18.By
This, sand blasting unit 1 can remove larger burr etc. in advance from projection material etc..Further, it is provided with bucket elevator 13
Pill feeds mouth 13a, and sand blasting unit 1 can feed projection material.
Separator 14 is set to be connected to dust arrester 15 and hopper 11.In the present embodiment, separator 14 is wind
Select formula.Separator 14 make projection material etc. with apron shape fall, and make by dust arrester 15 attract produce defined wind speed and wind
The air-flow of amount collides the projection material from the direction vertical with falling direction, thus, from projection material etc. select sand, scale and
Pulverized small projection material.Sand, scale and the pulverized small projection material picked out are by dust arrester 15 times
Receive, and discharged to outside device.With the wind speed air quantity of the air-flow of the projection collision such as material can by be arranged at dust arrester 15 with
The aperture of damper 19 between separator 14 is controlled.Thus, sand blasting unit 1 can adjust effectiveness of classification, after formation, maintenance
The operation admixture (Operating mix) that face is described.Moreover, the projection material effective to impeller blasting is supplied again
It is recycled to hopper 11.
Because the amount of the projection material in device reduces the amount discharged to outside sand blasting unit 1, so needing to feed with subtracting
The projection material of a small amount of corresponding amount.The reduction of projection material is detected by the load current value of impeller 12, and passes through pill
Supply mouth 13a newly projects material to feed.
Control device (not shown) is the computer for possessing CPU, ROM, RAM etc., and the composition to above-mentioned sand blasting unit 1 will
Part is controlled.
Next, reference picture 2, Fig. 3 are said to the method for carrying out impeller blasting to cast(ing) surface using sand blasting unit 1
It is bright.Fig. 2 is the explanation figure for the process for representing the impeller blasting method involved by embodiment.
As shown in Fig. 2 first, starting sand blasting unit 1, in step sl, implement projection mixture process.In projection material
In material filling process, mouth 13a is fed by untapped projection mixture in sand blasting unit 1 by pill.Below to projection material
Material is described.
Then, in step s 2, operation admixture formation process is implemented.Operation sand blasting unit 1 be repeated projection, to
Discharged outside device fine powder and supply it is a series of operation as a result, in sand blasting unit 1 projection material particle diameter distribution
Stabilize to the constant particle diameter distributions different from the particle diameter distribution of untapped projection material.By the shape of the stable particle diameter distribution
State is referred to as operating admixture.For projection material, operation mixing is managed in the way of it can carry out efficient impeller blasting
The interior particle diameter distribution for projecting material of device after state is formed is more important.
In step s 2, so that operation admixture formed after sand blasting unit in particle diameter distribution turn into full by control
The feature distribution of foot (ratio of the first plastochondria) >=(ratio of the second plastochondria) >=(ratio of the 3rd plastochondria).Projection material is drawn
It is below 1.18mm and the second plastochondria and particle diameter more than 0.85mm to be divided into first plastochondria of the particle diameter more than 1.18mm, particle diameter
For below 0.85mm the 3rd plastochondria.Furthermore, it is also possible to which so that the ratio of the first plastochondria is more than 60 weight %, the second plastochondria
Ratio is that 5~30 weight %, the ratio of the 3rd plastochondria are that mode below 20 weight % manages particle diameter distribution.
Using the criterion of the particle diameter distribution and the operation admixture of impeller blasting existing, as casting
“ECONOMICAL AND FUNCTIONAL ASPECTS OF BLAST CLEANING ABRASIVES BLASTING
THEORY " (WHEEL ABRATOR companies issue, 1972) particle diameter distribution is compared.Comparative result is shown in table 1.
In addition, " the 3rd plastochondria " in present embodiment is to mix the 3rd plastochondria of the existing criterion in table 1 and the 4th plastochondria
Mixture afterwards.
Table 1
As shown in table 1, the particle diameter distribution of the projection material of present embodiment is shown compared with existing projection material substantially
A large amount of feature distributions containing the first larger plastochondria of impeller blasting power.
The impeller blasting power of first plastochondria is higher, especially for the firm scale layer removed positioned at the most top layer of casting
Effectively.The first plastochondria is set to increase compared with existing projection material, so as to shorten the impeller blasting time.
Second plastochondria is the amount with existing situation same degree, thereby, it is possible to ensure coverage rate.
The impeller blasting power of 3rd plastochondria is relatively low, it is impossible to effectively removes scale, therefore makes itself and existing projection material
Compared to reduction.In addition, the 3rd plastochondria includes casting mold sand, being mixed into for casting mold sand can be suppressed by reducing by the 3rd plastochondria, therefore
The loss of the part of composition sand blasting unit can be suppressed.
Fig. 3 is the explanation figure for representing to operate admixture formation process (step S2).It is first in order to form operation admixture
First, in the step s 21, for example, prepare the emulation workpiece by being constituted with casting identical material, sandblasting dress is started in step S22
Put 1, with carry out casting impeller blasting when identical condition to emulation workpiece projection projection material, and be repeated to
Fine powder, a series of operation of supply are discharged outside device.As a result, in sand blasting unit 1 projection material particle diameter distribution into
For the particle diameter distribution different from the particle diameter distribution of untapped projection material.In addition it is also possible to without using emulation workpiece, it is and unloaded
Project material.
In step S23, with the step S5 identicals followed by narration judge, in the situation of supply projection material
Lower entrance step S25, returns to step S23 afterwards.Enter step S24 in the case where not feeding projection material.
Then in step s 24, judge whether projection time reaches to preset to form operation admixture
Reasonable time.Enter step S26 in the case of reasonable time projection time is reached, returned in the case where not reaching
Step S23.
Then in step S26, projection material is sampled and measures particle diameter distribution, be made whether to form desired
Operation admixture evaluation.Project material sampling can from the gate 11b that dams, bucket elevator 13, separator 14 it
It is middle to carry out.(the step S26 in the case where being judged as foring desired operation admixture：It is), into step S27,
Terminate projection in step S27.Next, reclaiming emulation workpiece in step S28, and enter step S30.
Fig. 4 is the explanation figure for the change for representing to operate the particle diameter distribution in the forming process of admixture.The particle diameter of transverse axis
Show the lower limit of particle size interval as typical value.This is identical in the figure of following particle diameter distribution.For with untapped
State is shown for the projection material of the particle diameter distribution of (A), such as shown in (B), the percentage by weight reduction of the first plastochondria, second
Particle increase below body.Because, the first plastochondria is pulverized and reduces, so as to generate the particle below the second plastochondria.If
Operation admixture is formed with, then as shown in (C), the percentage by weight of the first plastochondria is further reduced, below the second plastochondria
Particle further increases.The separated device 14 of particle below 3rd plastochondria is discharged to outside machine, so as to suppress the increase of the 3rd plastochondria.Separately
Outside, the initial pellets equivalent to above-mentioned discharge rate are fed to the first plastochondria, so as to suppress the reduction of the first plastochondria.Therefore, first
Body, the second plastochondria, the ratio of the 3rd plastochondria stabilize to the state of (C).
(the step S26 in the case where being judged as not forming desired operation admixture：It is no), into step S29, adjust
After the whole aperture of damper 19, step S22 is returned to.In step S29, such as in the more situation of the particle of path
Under, the particle of air quantity increase to remove path etc. can be made by improving the aperture of damper 19.
In step s 30, sand blasting unit 1 will be arranged on the casting identical test specimen for carrying out impeller blasting processing, then
In step S31, with identical condition projection projection material during impeller blasting with carrying out casting, impeller blasting is carried out.Step
S32, S34 carry out identical processing corresponding with step S23, S25 respectively.In step S34, judge whether to reach to enter
The impeller blasting of row casting and setting time set in advance.In the case where projection time reaches setting time, into step
Rapid S35, terminates the projection of projection material, in the case where not reaching, returns to step S5.After step S35, in step S36
Middle recovery test specimen, and enter step S37.
In step S37, judge whether the impeller blasting state of test specimen is appropriate.It is being judged as that impeller blasting state is appropriate
In the case of (step S37：It is), into step S3.(the step S37 in the case of impeller blasting state is unsuitable：It is no), into step
After rapid S38, change projection condition (projection time, velocity of projection etc.), step S30 is returned to.
In above-mentioned each operation (S21-S38), step S23, step S32 judgement can be replaced, and according to being expelled to machine
The amount of outer projection material is judged.Alternatively, it is also possible to without judging, and feed projection material in required time.In addition,
The regulation of damper can not also be carried out in step S29, and be tackled by extending projection time.Each operation is either
Automatically, manually.In the case where carrying out each operation automatically, each operation is implemented by control device.
In step s3, it is the workpiece mounting table 17 that casting is positioned in projection chamber 16 by impeller blasting object, in step
In S4, to form the state projection projection material of operation admixture, so as to carry out the impeller blasting of cast(ing) surface, (ball blast is clear
Science and engineering sequence).
In step s 5, it is according to the load current value judgement of the galvanometer of the impeller 12 in projection projection materials process
No supply projection material.It is more than current value set in advance and the situation for as defined in below change value in load current value
Under, it is judged as not feeding projection material and enters step S6.It is below current value set in advance or super in load current value
In the case of having crossed defined change value, it is judged as supply projection material and enters step S7.Moreover, in the step s 7, passing through
Pill supply mouth 13a feeds the new projection material of ormal weight, and returns to step S5.Load according to consideration bucket elevator etc.
And the ormal weight set feeds projection material.Thereby, it is possible to maintain desired operation admixture.
In step s 6, judge whether projection time reaches set in advance to set to carry out the impeller blasting of casting
Fix time.In the case where projection time reaches setting time, into step S8, in the case where not reaching, step is returned to
Rapid S5.Then, terminate projection in step s 8, workpiece (casting) is taken out in step s 9.
In step slo, the casting that impeller blasting processing is implemented with the stipulated time is taken out from sand blasting unit 1, and is passed through
Visually impeller blasting state is evaluated in observation etc., judges whether the impeller blasting of casting completes.It is being judged as the impeller blasting of casting
(step S10 in the case of completion：It is qualified), into step S11, in the case where the impeller blasting for being judged as casting is not completed
(step S10：It is unqualified), return to step S3.
In step s 11, lasting impeller blasting processing is judged whether.In the case of not next workpiece, terminate one
The operation of series, in the case where there is next workpiece, operation later implementation steps S3 repeatedly.
According to above-mentioned impeller blasting method, the particle diameter distribution of the projection material after can operation admixture be formed is formed
For the distribution of the impeller blasting suitable for casting, therefore the impeller blasting method can improve impeller blasting power and impeller blasting simultaneously
Efficiency.
Hereinafter, the projection material for meeting the particle diameter distribution after the operation admixture of present embodiment is formed is illustrated the ability to
One example of material.
Projection material is the pill to be selected among the scope of HV300~600 from Vickers hardness.Can be with component system
Selected material, shape, but in the present embodiment, use the spherical pill being made up of ferrous material.Here, as iron system material
Material, e.g. including C：0.8~1.2 weight %, Mn：0.35~1.20 weight %, Si：0.40~1.50 weight %, P≤0.05
The weight % of weight %, S≤0.05, remainder Fe and inevitable impurity component system, can use has tempering
The particle of martensitic structure or similar tissue.Such particle such as can by water atomization known to method be made.
Here, the hardness of projection material is more than HV300 and the hardness enough relative to impeller blasting object, in below HV600, projection
Material has enough toughness.So, the projection material of present embodiment has enough hardness and toughness concurrently, thereby, it is possible to suitable
Share the impeller blasting in cast(ing) surface.Vickers hardness hv is based on Japanese Industrial Standards JIS Z 2244 (2009).
Fig. 5 is the projection material as the example that can be used in the impeller blasting method involved by embodiment
Particle diameter distribution schematic diagram.The particle diameter of transverse axis shows the lower limit of particle size interval as typical value.Projection material particle diameter d be
0.85mm ＜ d≤2.36mm, the distribution for projecting the particle diameter d of material is adjusted as follows：Frequency distribution (JIS G
5904) frequency of particle size interval 1.18mm ＜ d≤1.40mm in is maximum, particle size interval 1.70mm ＜ d≤2.00mm frequency
Rate is 0.4~1.0 times of particle size interval 1.18mm ＜ d≤1.40mm frequency, and particle size interval 1.40mm ＜ d≤1.70mm
Frequency be 0.2~0.7 times of frequency of particle size interval 1.18mm ＜ d≤1.40mm.The measuring method of particle diameter distribution is based on day
This industrial standard JIS G 5904 (1966), are shown with distribution of weight.
The distribution for projecting the particle diameter d of material is for example adjusted as follows：Particle size interval 1.70mm ＜ d≤2.00mm
Frequency be 0.6~0.8 times of frequency of particle size interval 1.18mm ＜ d≤1.40mm, and particle size interval 1.40mm ＜ d≤
1.70mm frequency is 0.3~0.6 times of particle size interval 1.18mm ＜ d≤1.40mm frequency.Thereby, it is possible to further raising
Impeller blasting power and impeller blasting efficiency, can be suitable for the impeller blasting of casting.
Projection material with such particle diameter distribution can be by the way that the first projection material and the second projection material be mixed
And be made, wherein, the particle diameter d of the first projection material is 1.18mm ＜ d≤2.36mm and frequency is in particle size interval 1.70mm ＜ d
≤ 2.00mm is maximum, and the particle diameter d of the second projection material is 0.85mm ＜ d≤1.40mm and frequency is in particle size interval 1.18mm ＜
D≤1.40mm is maximum.In other words, projection material is the mixture of the first projection material and the second projection material.
If for example, in the impeller blasting of casting be used only first projection material, although impeller blasting power can be improved,
But because the population of per unit weight tails off, so coverage rate (the flat trace of reality of the projection material per constant area can be caused
Area) reduction.On the other hand, although the second projection material can improve coverage rate, compared with the first projection material, relative to
The sand scale especially consolidated, impeller blasting power is relatively low.Therefore, although the second projection material has for the removal of casting mold sand, scale
There is enough impeller blasting power, but for removing scab produced on casting mold sand surface etc., impeller blasting power is not enough, and ball blast is clear
The reason time is elongated.
In the projection material involved by present embodiment, by these projection materials in the way of as above-mentioned particle diameter distribution
Mixed, thereby, it is possible to maintain respective advantage, supplement the part of impeller blasting scarce capacity.The first projection can be utilized
Material improves impeller blasting power, and coverage rate is improved using the second projection material.In other words, ball blast can be improved simultaneously
Clear up the impeller blasting of power and impeller blasting efficiency.
In addition, the first projection material is mixed with the second projection material and projection material is made, thus, it is possible to which particle diameter is divided
Cloth is formed as actual continuous distribution.Thus, because the size of the flat trace of impeller blasting has continuous distribution, so can increase
Big coverage rate, can efficiently carry out impeller blasting.
For the first projection material and the second projection material, it can use specified in JIS Z 8801 (2006)
The particle being made using method known to water atomization etc. is classified by mesh for 0.85mm~2.36mm sieve, and with as wishing
The mode of the particle diameter distribution of prestige mixes, adjusts and be made.
, can not be by special device, method admixture will be operated using in the case of above-mentioned projection material
The particle diameter distribution in sand blasting unit after formation is formed as being adapted to the above-mentioned distribution of the impeller blasting of casting.
(modification)
The projection material fed in step S25, S34, S7 can also use different from the projection material loaded in step S1
Projection material.For example, it is also possible to only feed the projection material in big footpath, desired operation admixture is formed.In addition, projection
The form of material is not limited to pill, can also use gravel, chopping etc..Moreover, the first projection material and the second projection material
Material can be identical material, can also be formed by the different material of hardness.
(effect of embodiment)
Impeller blasting method according to involved by embodiment, by the particle diameter of the projection material after operating admixture to be formed
Distribution is formed as feature distribution：It is only secondary in order to ensure coverage rate largely containing the first larger plastochondria of impeller blasting power
Include second plastochondria in the first plastochondria more, and reduce the 3rd relatively low plastochondria of impeller blasting power.Thereby, it is possible to utilize first
Body shortens the impeller blasting time to improve impeller blasting power, coverage rate can be ensured using the second plastochondria, so as to realize
The impeller blasting method of the casting of impeller blasting power and impeller blasting efficiency is improved simultaneously.
Embodiment
Hereinafter, for being illustrated for the embodiment for confirming the effect of the present invention and carrying out.Used in the present embodiment
Machined object is, by the way that material is set into FC250, to be poured into a mould with 1350 DEG C of pouring temperature, after being cast 30min branch mailbox, and
Obtained from being cooled down with 3 DEG C/min cooling velocity.Product weight is about 3.5kg.Projectile test dress used in experiment
It is shot-peening SNTX-I types (Xindong Industry Co) to put, and is entered with 73m/s velocity of projection, 6rpm workbench rotational velocity
Row is implemented.
(1) influence of the particle diameter of the projection material after operation admixture is formed
Use the steel that particle diameter is 0.36mm, 0.60mm, 0.85mm, 1.00mm, 1.18mm, 1.40mm, 1.70mm, 2.00mm
Grain (HV450), and investigated the relation between projection density and derusting degree.Projection density represents to be projeced into the per unit of machined object
The cumulant of the projection material of area, it is corresponding with projection time.Derusting degree be by specimen surface amplification 20 times shot after,
Graphic integration is carried out to the removal ratio of rust and the standard photographs with measuring are contrasted and obtained.Result is shown in Fig. 6.
Fig. 6 is the figure illustrated to result obtained by having investigated influence of the particle diameter to derusting degree.
Derusting degree and projection density rise together.In addition, derusting degree rises as particle diameter becomes big, but think that derusting degree exists
In the trend of almost saturation when particle diameter is 1.18mm.Thus, understood that, in order to obtain larger impeller blasting power, particle diameter is
More than 1.18mm, if considering coverage rate, particle diameter can also be 1.18mm.
On the other hand, even if projection density is 300kg/m2, derusting degree when particle diameter is 1.18mm is also 70% or so.This
Be because, particle diameter is not present for below 1.0mm particle, in other words, do not include the second plastochondria, thus coverage rate do not rise.
For particle diameter distribution after being formed accordingly, for operation admixture, understand that effectively utilizing the first plastochondria obtains larger
Impeller blasting power and shorten the impeller blasting time, utilize the second plastochondria improve coverage rate.
(2) impeller blasting is tested
The machined object and projection condition that are used in this experiment with it is above-mentioned " (1) operation admixture formed after projection
The influence of the particle diameter of material " is identical.
Prepare first project material and second projection material, and by both mix and adjust particle diameter distribution and be made for test
Projection material, wherein, the first projection material is so that particle diameter d is 1.18mm ＜ d≤2.36mm and frequency in particle size interval
What mode maximum 1.70mm ＜ d≤2.00mm was adjusted out, the second projection material be so that particle diameter d be 0.850mm ＜ d≤
1.40mm and frequency are adjusted out in the maximum modes of particle size interval 1.18mm ＜ d≤1.40mm, and the hardness of projection material is
HV450.Particle diameter distribution is shown in Fig. 7.Fig. 7 is the explanation figure of the particle diameter distribution for the projection material for representing embodiment.The particle diameter point
Cloth meets the condition of the particle diameter distribution of the projection material illustrated.In addition, as comparative example, also implementing use(particle diameter
Scope：1.40mm ＜ d≤2.36mm) steel grit carry out experiment.Projection density is 150kg/m2~300kg/m2.Embodiment, ratio
Compared with example will projection material input projectile test device, and be repeated and continuously run and feed and form operation admixture
Projectile test is carried out afterwards.First plastochondria is that 76 weight %, the second plastochondria are that 20 weight %, the 3rd plastochondria are 4 weight %, operation
Particle diameter distribution after admixture is formed meets the particle diameter distribution of present embodiment.
Impeller blasting experiment after specimen surface figure 8 illustrates.Fig. 8 is the table for representing the sample after impeller blasting experiment
The explanation figure of surface state.Convex-concave portion and character portion (marking portion) are amplified and finishing situation is observed, observation by visual observation is implemented
Evaluate.The details of the visual observation of outward appearance is concluded in fig .9.Fig. 9 is that the surface state shown in Fig. 8 is said
Bright table.As shown in FIG. 8 and 9, in a comparative example, it is 150kg/m in projection density2~250kg/m2In the range of, confirm
There is scale in the dashed region surrounded by dotted line.Moreover, being 300kg/m in projection density2At the time of, scale is removed.Cause
This, in a comparative example, it is 300kg/m that projection density is needed untill finishing2.On the other hand, it is close projecting in embodiment
Spend for 150kg/m2~200kg/m2In the range of, there is scale in the dashed region surrounded by dotted line in confirmation.Moreover, in projection
Density is 250kg/m2At the time of, scale is removed.In other words, in embodiment, confirm to project density as 250kg/m2Enter
Row finishing.
The flat region of amplifying observation, and derusting degree is measured.As a result shown in Figure 10.Figure 10 is to represent ball blast
The explanation figure of the measurement result of the derusting degree of sample after cleaning experiment.Think that derusting degree increases with the increase of projection density
Plus.Derusting degree is that more than 90% finishing equivalent to visual observation ocular estimate completes point.Confirm in embodiment, can
Equal finishing is realized with the state that density reduction by 17% is projected compared with comparative example, so as to shorten during impeller blasting
Between.
Description of reference numerals：
1 ... sand blasting unit；11 ... hoppers；11a ... reservoirs；11b ... dams gate；12 ... impellers；13 ... bucket liftings
Machine；13a ... pills feed mouth；14 ... separators；15 ... dust arresters；16 ... projection chambers；17 ... workpiece mounting tables；17a ... rotates
Mechanism；18 ... rock metal portion；19 ... dampers.
Claims (3)
1. projection material, the surface of casting is projeced into using sand blasting unit by a kind of impeller blasting method of casting, wherein, tool
It is standby：
Mixture process is projected, in the process, by untapped projection mixture in the sand blasting unit, the projection
Material is that Vickers hardness is the projection material in the range of HV300~600；
Admixture formation process is operated, in the process, the grain by material is projected is formed by the operation of the sand blasting unit
Footpath is distributed the operation admixture for stabilizing to constant particle diameter distribution；And
Impeller blasting process, in the process, casting is projected to by the projection material after the operation admixture formation process
Surface,
Projection material after by the operation admixture formation process is divided into the first plastochondria, grain that particle diameter exceedes 1.18mm
During three plastochondria that footpath is below 1.18mm and the second plastochondria and particle diameter more than 0.85mm are below 0.85mm, the behaviour
The particle diameter distribution for making the projection material after admixture formation process is met：The ratio of the plastochondria of the ratio of first plastochondria >=second >=
The ratio of 3rd plastochondria.
2. the impeller blasting method of casting according to claim 1, wherein,
The ratio of first plastochondria is more than 60 weight %, and the ratio of the second plastochondria is 5~30 weight %, and the ratio of the 3rd plastochondria is
Below 20 weight %.
3. the impeller blasting method of casting according to claim 1 or 2, wherein,
The untapped projection material is the mixture of the first projection material and the second projection material, wherein, first projection
The particle diameter d of material is 1.18mm ＜ d≤2.36mm and frequency is maximum in particle size interval 1.70mm ＜ d≤2.00mm, second throwing
The particle diameter d of material is penetrated for 0.85mm ＜ d≤1.40mm and frequency is maximum in particle size interval 1.18mm ＜ d≤1.40mm.
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| JP2015049747 | 2015-03-12 | ||
| JP2015-049747 | 2015-03-12 | ||
| PCT/JP2016/053066 WO2016143414A1 (en) | 2015-03-12 | 2016-02-02 | Method for blast-cleaning casting product |
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| CN107000164A true CN107000164A (en) | 2017-08-01 |
| CN107000164B CN107000164B (en) | 2019-04-12 |
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| JP (1) | JP6213695B2 (en) |
| KR (1) | KR102460924B1 (en) |
| CN (1) | CN107000164B (en) |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111615439A (en) * | 2018-01-25 | 2020-09-01 | 新东工业株式会社 | Projection material and blasting method |
| CN113862495A (en) * | 2021-09-30 | 2021-12-31 | 宁波创致超纯新材料有限公司 | Preparation method of high-purity manganese |
| CN114082705A (en) * | 2021-11-16 | 2022-02-25 | 宁波江丰电子材料股份有限公司 | Surface cleaning method for high-purity manganese |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BR112018073913A2 (en) * | 2016-06-23 | 2019-02-26 | Sintokogio Ltd | granulated material and process for surface treatment of metal product using said granulated materi-al |
| CN111615438A (en) | 2018-01-25 | 2020-09-01 | 新东工业株式会社 | Projection material and shot peening method |
| JP7453858B2 (en) | 2020-06-18 | 2024-03-21 | サンコール株式会社 | shot peening equipment |
| CN113246919A (en) * | 2021-04-16 | 2021-08-13 | 中铁第一勘察设计院集团有限公司 | Method for cleaning high-pressure porcelain insulator on top of locomotive by using shot |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0788770A (en) * | 1993-09-20 | 1995-04-04 | Japan Metals & Chem Co Ltd | Shot blast material |
| JP2001353661A (en) * | 2000-06-15 | 2001-12-25 | Sinto Brator Co Ltd | Projection material for blasting |
| JP2002355762A (en) * | 2001-05-30 | 2002-12-10 | Sharp Corp | Separating method and separating device for blast chip |
| CN101535003A (en) * | 2006-09-11 | 2009-09-16 | 安比奥有限公司 | Method of doping surfaces |
| JP2014054686A (en) * | 2012-09-11 | 2014-03-27 | Yoshikawa Kogyo Co Ltd | Blast device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3027980B2 (en) | 1993-04-16 | 2000-04-04 | 新東工業株式会社 | How to remove castings |
| NL1022066C2 (en) * | 2002-01-16 | 2003-08-07 | Paulus Theodorus Heesakkers | Device for irradiating objects to be galvanized. |
-
2016
- 2016-02-02 WO PCT/JP2016/053066 patent/WO2016143414A1/en active Application Filing
- 2016-02-02 JP JP2017504907A patent/JP6213695B2/en active Active
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0788770A (en) * | 1993-09-20 | 1995-04-04 | Japan Metals & Chem Co Ltd | Shot blast material |
| JP2001353661A (en) * | 2000-06-15 | 2001-12-25 | Sinto Brator Co Ltd | Projection material for blasting |
| JP2002355762A (en) * | 2001-05-30 | 2002-12-10 | Sharp Corp | Separating method and separating device for blast chip |
| CN101535003A (en) * | 2006-09-11 | 2009-09-16 | 安比奥有限公司 | Method of doping surfaces |
| JP2014054686A (en) * | 2012-09-11 | 2014-03-27 | Yoshikawa Kogyo Co Ltd | Blast device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111615439A (en) * | 2018-01-25 | 2020-09-01 | 新东工业株式会社 | Projection material and blasting method |
| CN111615439B (en) * | 2018-01-25 | 2022-07-12 | 新东工业株式会社 | Projection material and blasting method |
| US11478897B2 (en) | 2018-01-25 | 2022-10-25 | Sintokogio, Ltd. | Blasting processing method using shot media |
| TWI795518B (en) * | 2018-01-25 | 2023-03-11 | 日商新東工業股份有限公司 | spray treatment method |
| CN113862495A (en) * | 2021-09-30 | 2021-12-31 | 宁波创致超纯新材料有限公司 | Preparation method of high-purity manganese |
| CN114082705A (en) * | 2021-11-16 | 2022-02-25 | 宁波江丰电子材料股份有限公司 | Surface cleaning method for high-purity manganese |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2016143414A1 (en) | 2017-08-17 |
| BR112017011563A2 (en) | 2018-01-02 |
| KR20170128365A (en) | 2017-11-22 |
| JP6213695B2 (en) | 2017-10-18 |
| CN107000164B (en) | 2019-04-12 |
| WO2016143414A1 (en) | 2016-09-15 |
| KR102460924B1 (en) | 2022-11-01 |
| BR112017011563B1 (en) | 2021-06-08 |
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