CN1033589A - Abrasive grain is evenly distributed on the method in the carcass - Google Patents
Abrasive grain is evenly distributed on the method in the carcass Download PDFInfo
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- CN1033589A CN1033589A CN 87101466 CN87101466A CN1033589A CN 1033589 A CN1033589 A CN 1033589A CN 87101466 CN87101466 CN 87101466 CN 87101466 A CN87101466 A CN 87101466A CN 1033589 A CN1033589 A CN 1033589A
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- abrasive grain
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Abstract
This method is that abrasive grain is rolled in the container of rotation, has the ash free solution of low boiling to make binding agent, and preparation makes abrasive grain can be evenly distributed on compound in the carcass powder.This compound is put into the mould sintering, can obtain abrasive grain and be evenly distributed on goods in the carcass.The diamond bit of Zhi Zaoing in this way, diamond distribution is even, and it is good to go out sword, plates the diamond place and is obvious tadpole shape and supports the life-span of having improved diamond bit greatly.
Description
The present invention is evenly distributed on the method in the carcass for a kind of abrasive material (diamond or tungsten carbide, aluminium oxide etc.) that makes, and it is applicable to the grinding tool manufacturing industry.The invention provides a kind of preparation earlier is core with the abrasive grain, and required carcass powder is the ball ball of inclusion enclave, is made the method for grinding tool again by the ball ball.
When making grinding tool with abrasive material in the past, because the granularity of abrasive grain and carcass powder differs greatly, proportion is different again, make abrasive grain in carcass, be difficult to evenly distribute, the goods that sintering is come out in use easily produce abrasive grain intensive place threshing, and draw situations such as ditch at sparse place, even cause the crackle of goods or fall piece, Products Quality influenced.
In U.S. Pat 3316073, provided a kind of ball ball manufacture method with metal dust parcel diamond dust.This method is each adds in carcass powder with 1% of weight as: dextrin, paraffin wax as the solid-state organic matter of adhesive, on the abrasive grain that rolls, spray tiny water smoke then, treat that abrasive grain sprinkles the above-mentioned carcass powder that has adhesive after wetting, makes the ball ball.Perhaps make binding agent and manufacture the ball ball with the shellac agent.The adhesive of the former usefulness is solid-state, with water slightly soluble or indissoluble water, can be topped equably on abrasive surface the liquid state so can not resemble, thereby easily produce the uneven situation of bonding.In addition, sprinkling water smoke easily makes the burning in the carcass, influences the tyre-e/or performance of goods.And the shellac agent ash content that the latter uses is bigger, easily pollutes the carcass powder, influences Products Quality.In addition, in the pill method of this patent, the axis of the container of use and the inclination angle of horizontal plane are fixed, and can not suitably adjust the inclination angle with the increase of ball ball weight and obtain to help the centrifugal force that the ball ball rolls.Thereby make some abrasive grain can not be wrapped powder, can't form the ball ball.
For this reason, the present invention proposes a kind of make abrasive material as: (diamond or tungsten carbide, carborundum, aluminium oxide etc.) uniform particles is distributed in the method in the carcass.This method is by mixing abrasive material (diamond, tungsten carbide, carborundum, aluminium oxide etc.) particle with the carcass powder, and adopt ash free binding agent, abrasive grain is rolled in the container of rotation, make with the abrasive grain is core, wrap up in the ball ball of carcass powder outward, abrasive grain is kept apart equably by the carcass powder.During the ball ball that said method is made is packed mould into then, make grinding tool through oversintering.Abrasive grain is evenly distributed in the grinding tool made from this method, has improved service life widely.
Method of the present invention realizes in the following manner: earlier abrasive material (diamond or tungsten carbide, carborundum, aluminium oxide etc.) particle is placed in the cydariform container of rotation and rolls, rotary speed is preferably 50～60 rev/mins, container axis becomes an inclination angle with horizontal plane, initial angle is preferably 60 °, this inclination angle becomes with ball ball volume and diminishes greatly and gradually, and its optimum range is 60 °～35 °.At first spray a layer binder on the abrasive grain that rolls, the binding agent that the present invention adopts is the mixed liquor of ethanol and glycerine, or ethanol and ethylene glycol mixtures, and these mixed liquors do not have ash content, and enough viscosity is arranged, and do not influence the performance of carcass powder yet.Treat that abrasive grain sprinkles one deck carcass powder after fully wetting, under the bonding of above-mentioned binding agent, the carcass powder just is wrapped on the surface of abrasive grain.And then on the abrasive grain that rolls, spray and state mixed liquor with carcass powder parcel, sprinkle one deck carcass powder again after the abrasive grain of stand-by carcass powder parcel is fully wetting, carry out hydrojet so repeatedly, the dusting process, and betwixt along with the increase of ball ball volume, constantly regulate the inclination angle of container axis and horizontal plane, the inclination angle is diminished gradually by initial angle, so that the ball ball in the container can fully roll.The mixing liquid measure of being sprayed is neither to make abrasive grain or ball ball bonded to one another; fully wetting again for suitable; each spouting liquid and dusting amount increase with the increase of ball ball volume, and the powder amount of each adding can all be wrapped on abrasive grain or the ball ball, also can adding again after sieving if excessive.The so hydrojet and dusting of repeated multiple times; abrasive grain or ball ball just are stained with carcass powder from level to level in rolling, and in rolling with the powder compacting on the surface of oneself, forming at last with the abrasive grain is core; the carcass powder of outsourcing uniform thickness, and the ball ball of certain intensity is arranged.Because the binding agent that adopts is beneficial to sprinkling very much, the particle in the container rolls fully, so the ball ball volume of producing is than homogeneous.Container axis when container stops to roll and the inclination angle of horizontal plane are preferably about 35 °.
After making the ball ball, the ball ball of volume homogeneous is placed in the mould, the distance between the abrasive grain equates substantially, shown in figure I.These ball balls are colded pressing make the carcass of required finished form, at this moment still do not influence the even distribution of abrasive grain.Because the binding agent boiling point that is adopted is lower, is placed in the vacuum drying chamber, can dry in 2～3 hours.Carcass hot pressed sintering with after the oven dry just can obtain the equally distributed goods of abrasive grain.The abrasive material that goods are used can be that 80 orders are with thick diamond.Also can be that 80 orders are with thick tungsten carbide, carborundum, aluminium oxide ... Deng.Abrasive grain as ball ball core can be a same particle sizes, also can be varigrained.Though the product lack of homogeneity that varigrained abrasive material is made is a little, also can reach the best uniformity that it can reach.
The factor that homogeneous volume ball ball is made in influence is a lot, adopts method of the present invention that following advantage is arranged:
1. suitable in performance, and can form under the situation of spraying, binding agent is sticking more good more, sticking more then lubricated good more between abrasive grain, and it is also easy bond, and the ball ball of formation is difficult for fragmentation.Roll, easily form the ball ball of volume homogeneous, the binding agent that the present invention adopts has the advantage that can form the spraying and enough viscosity is arranged.
2. under the situation that the kind of abrasive grain and binding agent is determined, the decisive factor that whether can make desirable ball ball is whether the abrasive material in the container can roll fully, and the quality of rolling depends on the centrifugal action of giving abrasive material when container rotates.Take abrasive grain to certain height by the particle of certain centrifugal force generation and the frictional force of chamber wall.Gravity effect by himself rolls down along the container curved surface that tilts then; if hydrojet or dusting on the particle surface that is rolling; then the whole surface of particle can both be by fully wetting, and can wrap up in powder layer by layer equably, thereby to make particle or ball ball produce the centrifugal force that rolls be only.If centrifugal force is too small; then also less by the frictional force of the less particle that centrifugal force produced or ball ball and chamber wall; it can not be taken to higher height like this; add their gravity and the effect of frictional force to each other; they can only be swung on residing position, influenced the wetting of surface and wrapped up in powder.If when centrifugal force is big, after then particle or ball ball rise to certain height with chamber wall, under the gravity effect, freely fall, so just produced the percussion between particle or ball ball, the carcass powder of just having wrapped is come off, be unfavorable for making the ball ball.If centrifugal force is excessive, surpassed the gravity of particle, a part of particle is attached on the chamber wall is in relative static state with chamber wall, then more be unfavorable for the formation of ball ball.Thereby when making the ball ball, must allow the particle in the container roll, this just needs to regulate the size that is suitable for the centrifugal force that particle rolls.Because F=(G)/(g) ρ is W
2Total centrifugal force that the F-abrasive grain is subjected in the formula; G-acceleration of gravity; The center of gravity radius vector of ρ-abrasive grain; The rotational angular velocity of W-container; The gross weight of G-abrasive grain.By following formula as seen, when rotating speed one regularly F be directly proportional with G, ρ.Because to continuous hydrojet of abrasive grain and dusting, the G value,, has only by the axis of variation container and the inclination angle of horizontal plane to reach with the numerical value that changes ρ for guaranteeing to be suitable for the centrifugal force of particle or the rolling of ball ball so the F value also constantly increases in continuous increase.The numerical value of ρ reduces along with the increase at the inclination angle of container axis and horizontal plane, thereby we are when the system ball, constantly increase with ball ball weight, the axis of container and the inclination angle of horizontal plane are done the ball ball that descending adjusting then can make whole abrasive grains formation volume homogeneous.Ball ball formation rate reaches 100%.
Be the diamond abrasive tool that adopts the inventive method to make below:
60 order diamond 36g are placed in the cydariform container of rotation and roll, its rotating speed is 55 rev/mins, this moment, the inclination angle of container axis and horizontal plane was about 60 °, toward the diamond surface spray one deck ethanol and glycerine mixed liquor that roll, treat diamond surface abundant wetting after, sprinkle the layer of metal mixed powder, treat that the metal mixed pruinescence is stained with, and after rolling was compacted, hydrojet was spread the metal mixed powder more again.Liquid measure will make diamond surface fully wetting not adhered to one another again.The dusting amount is controlled at it can all be wrapped on the diamond surface.Along with the adding of mixed liquor and metal mixed powder, be that the ball ball of core begins to take shape with the diamond, and constantly increasing its volume and weight.At this moment, suitably reduce the inclination angle of container.To guarantee the abundant rolling of ball ball.Repeated multiple times like this, promptly having made with 60 order diamonds is core, wraps up in the ball ball of the volume homogeneous of metal mixed powder outward.This moment, the inclination angle of container was reduced to about 35 °.
Ball ball gross weight after making be 407.2g wherein:
30～36 order ball ball 367.1g account for 90.13% of gross weight
36 order ball ball 39.7g account for 9.8% of gross weight
46 order ball ball 0.2g account for 0.049% of gross weight
Used diamond is all made the ball ball, and added metal mixed powder also is wrapped on the diamond equably.Photo among Fig. 1 is the diamond ball ball made from the inventive method.
Its effect is also identical when adopting ethanol to be binding agent with ethylene glycol mixture in addition.
Need not to sieve after the ball ball is made and just it directly can be put into mould, make diamond bit.Its process is: with binding agent wetting metal mixed powder, according to mouth of a river quantity, quantitatively be divided into some five equilibriums and put into mould, compacting forms the mouth of a river part of drill bit.Then quantitative ball ball is put into the mould space that water nozzle separates, form the working lining part of drill bit.Add the metal mixed powder of a certain amount of above-mentioned wetting mistake above, to form the inoperative layer segment of diamond bit.With the drill steel body is that pressure head is colded pressing, just obtained the diamond bit of moulding, it is placed in the vacuum drying chamber oven dry after, carry out hot pressed sintering, sintering temperature is decided according to the performance of the metal mixed powder that is adopted, and the uniform finished product drill bit of diamond has just been made like this.
With the diamond bit that the inventive method is made, diamond plates firmly, the intensity height.Test in certain mining area.The diamond bit that photo among Fig. 2 is made for the method before using, its diamond distribution is inhomogeneous, and average life span only is 86 meters.Fig. 3 consumes situation behind a part of working lining with the diamond bit that former method is made.As seen, diamond distribution is inhomogeneous among the figure, and it is more serious to come off.Fig. 4 is that the diamond bit that the inventive method is made uses preceding situation, and diamond distribution is even.Fig. 5 is the diamond bit made from the inventive method, consume 2/3 working lining after, diamond distribution and go out the sword situation.As seen from the figure, diamond distribution evenly, to go out sword good, plates the diamond place and be tangible tadpole shape and support, and the situation that plates is good.The diamond bit made from the inventive method in use weares and teares normally, and average life span is 114 meters.
Claims (5)
1, a kind of abrasive grain that makes is evenly distributed on method in the carcass.It is characterized in that will grinding earlier in the cydariform container that abrasive grain is placed on rotation and roll, container axis becomes an inclination angle with horizontal plane, at first spray a layer binder on the abrasive grain that rolls.Treat that abrasive grain sprinkles one deck carcass powder after fully wetting, under the bonding of above-mentioned binding agent, the carcass pruinescence is wrapped on the surface of abrasive grain, and then on the abrasive grain that rolls, spray above-mentioned binding agent with carcass powder parcel, sprinkle one deck carcass powder again after the abrasive grain of stand-by carcass powder parcel is fully wetting, carry out hydrojet so repeatedly, the dusting process, therebetween, to constantly regulate the inclination angle of container axis and horizontal plane along with the increase of ball ball volume, the inclination angle is diminished gradually by initial angle, so that the ball ball in the container can fully roll.
2, the method for claim 1, its feature are that also said binding agent is mixed liquor or the ethanol and the ethylene glycol mixtures of ethanol and glycerine.
3, as claim 1,2 described methods, its feature is that also the initial angle at the inclination angle of said container axis and horizontal plane is 60 °, and the inclination angle when stopping to roll is 35 °.
4, as claim 1,2 described methods, its feature is that also the rotary speed of the container that rotates is 50～60 rev/mins.
5, method as claimed in claim 3, its feature are that also the rotary speed of said container is 50～60 rev/mins.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87101466 CN1009536B (en) | 1987-11-23 | 1987-11-23 | Even distribution of abrasive particle in die body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87101466 CN1009536B (en) | 1987-11-23 | 1987-11-23 | Even distribution of abrasive particle in die body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1033589A true CN1033589A (en) | 1989-07-05 |
| CN1009536B CN1009536B (en) | 1990-09-12 |
Family
ID=4813449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87101466 Expired CN1009536B (en) | 1987-11-23 | 1987-11-23 | Even distribution of abrasive particle in die body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1009536B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101851488A (en) * | 2009-03-31 | 2010-10-06 | 三河市科大博德粉末有限公司 | Ceramic bond diamond grinding block and manufacturing method thereof |
| CN104929526A (en) * | 2014-03-17 | 2015-09-23 | 中矿资源勘探股份有限公司 | Diamond bit material and preparing method thereof |
| CN108746634A (en) * | 2018-08-02 | 2018-11-06 | 泉州众志金刚石工具有限公司 | A kind of fine-granularity diamond is uniformly distributed saw blade tip and preparation method thereof |
| CN109277957A (en) * | 2018-08-27 | 2019-01-29 | 青岛新韩金刚石工业有限公司 | A kind of cutter head and its preparation process of diamond uniform distribution |
| CN113001422A (en) * | 2021-03-08 | 2021-06-22 | 天津职业技术师范大学(中国职业培训指导教师进修中心) | Pellet-stacked metal glass powder binding agent sintered internal-cooling grinding wheel and preparation method thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100357065C (en) * | 2003-02-28 | 2007-12-26 | 陈继锋 | Diamond grinding block and sintering method |
-
1987
- 1987-11-23 CN CN 87101466 patent/CN1009536B/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101851488A (en) * | 2009-03-31 | 2010-10-06 | 三河市科大博德粉末有限公司 | Ceramic bond diamond grinding block and manufacturing method thereof |
| CN104929526A (en) * | 2014-03-17 | 2015-09-23 | 中矿资源勘探股份有限公司 | Diamond bit material and preparing method thereof |
| CN108746634A (en) * | 2018-08-02 | 2018-11-06 | 泉州众志金刚石工具有限公司 | A kind of fine-granularity diamond is uniformly distributed saw blade tip and preparation method thereof |
| CN109277957A (en) * | 2018-08-27 | 2019-01-29 | 青岛新韩金刚石工业有限公司 | A kind of cutter head and its preparation process of diamond uniform distribution |
| CN113001422A (en) * | 2021-03-08 | 2021-06-22 | 天津职业技术师范大学(中国职业培训指导教师进修中心) | Pellet-stacked metal glass powder binding agent sintered internal-cooling grinding wheel and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN1009536B (en) | 1990-09-12 |
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