CN103707133A - Efficient and low-damage high-static hydraulic pressure grinding method for engineering ceramics - Google Patents
Efficient and low-damage high-static hydraulic pressure grinding method for engineering ceramics Download PDFInfo
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- CN103707133A CN103707133A CN201310705946.3A CN201310705946A CN103707133A CN 103707133 A CN103707133 A CN 103707133A CN 201310705946 A CN201310705946 A CN 201310705946A CN 103707133 A CN103707133 A CN 103707133A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
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Abstract
The invention discloses an efficient and low-damage high-static hydraulic pressure grinding method for engineering ceramics. The efficient and low-damage high-static hydraulic pressure grinding method for the engineering ceramics comprises the steps that firstly, the compressive strength of the ceramics to be machined is determined, then the ceramic work pieces are placed in a high-static hydraulic pressure device, high-static hydraulic pressure is applied to the ceramic work pieces, and the ceramic work pieces are ground under the high-static hydraulic pressurization state. The efficient and low-damage high-static hydraulic pressure grinding method for the engineering ceramics has the advantages that formation and expansion of neutral position cracks in grinding process can be reduced or restrained through the high-static hydraulic pressure, and therefore grinding damage is reduced, and the machining quality and use stability of the ceramics are improved; under the condition of the same damage, larger grinding parameters are allowed in the high-static hydraulic pressure grinding method, and therefore the grinding efficiency of the engineering ceramics can be improved, and efficient grinding under the condition of low damage is achieved; the machining time of subsequent polishing processes is largely shortened, the production efficiency of the ceramics is largely improved, and machining cost of the ceramics is lowered; machining damage to the engineering ceramics is reduced, machining efficiency is improved, and the manufacturing cost of the ceramics is lowered.
Description
Technical field
The present invention relates to a kind of grinding processing method of engineering ceramics.
Background technology
Engineering ceramics is planted body, cutting tool and photoelectric component etc. because of the advantages such as its good hardness and wear resistance, good heat endurance and chemical stability are widely used in manufacturing precision bearing, auto parts and components, Aero-Space are high temperature resistant components and parts, bionical compatibility.Ceramic component requires very harsh to machining accuracy and surface quality, as: the dimensional accuracy even submicron order of micron order of being everlasting, surface roughness is in even Subnano-class, finished surface and zero damage of sub-surface of nanoscale.Yet, because engineering ceramics is the difficult-to-machine material of a kind of high rigidity and high fragility, in process, because its hard fragility very easily forms processing crackle, thereby cause surface damage, reduced stability and the reliability of ceramic workpiece.At present, in industrial production, the main machining method of pottery is grinding, and the engineering ceramics surface and the sub-surface damage that in order to reduce grinding, cause, often need it to carry out precise polished processing after grinding.Although polishing can be removed the damage layer of grinding skin, yet its working (machining) efficiency is extremely low, thereby the more than 80% of its market price of processing cost Chang Gaoda that causes ceramic component, therefore, how reducing grinding damage and cut down finished cost is the key that engineering ceramic material can obtain extensive use.For ceramic grinding processing, the process that wheel grinding is removed material is the set of numerous abrasive particles to ceramic scratching effect.For traditional ceramic grinding processing, its Material Removal Mechanism as shown in Figure 1.Under the effect of grinding force, the scratching of abrasive particle forms cut at grinding skin, and abrasive particle can form complicated deformed area with the regional area that pottery contacts, and complicated plastic deformation and the fragmentation of crystal grain have appearred in regional area material, in deformed area, form Crack Damage around.
Ceramic grinding crack damage is divided into two classes: median crack and transversal crack.Median crack, to the expansion of material depths, is the principal element that affects engineering ceramics reliability; Transversal crack extends to form the removal of material to finished surface.Therefore, how the median crack of Control Engineering ceramic grinding is to reduce the key of ceramic grinding damage.For traditional grinding processing method of engineering ceramics, though can cut down finished cost while adopting larger material removing rate, can cause the aggravation of ceramic degree of injury; And while adopting ultra-fine diamond emery wheel to carry out grinding under little grinding dosage, can make material removal efficiency greatly reduce, processing cost increases.And the caused ceramic median crack lesion depths of traditional ceramic grinding method is larger, often cause the follow-up polishing time long, processing cost is high.For the grinding of engineering ceramics, grinding efficiency and low damage can not all obtain as fish and bear's paw.The high hydrostatic pressure grinding processing method that the present invention proposes can obtain higher grinding efficiency when reducing ceramic grinding machining damage, and the method will promote the extensive use of engineering ceramics device.
Summary of the invention
The object of this invention is to provide a kind of high hydrostatic pressure method for grinding for the processing of engineering ceramics high-efficiency low-damage, to reduce ceramic grinding machining damage, and improve grinding efficiency, reduce the manufacturing cost of engineering ceramics device.
Technical scheme of the present invention is, a kind of hydrostatic method for grinding of height of engineering ceramics high-efficiency low-damage, first determine the compression strength of processed ceramic material, then ceramic workpiece is placed in high hydrostatic device, ceramic workpiece is applied to high fluid pressure, under the quiet liquid pressurized state of height, ceramic workpiece is carried out to grinding.
Ceramic workpiece X, Y, Z three-dimensional are applied to high fluid pressure.
Apply the 0.05-0.5 of the compression strength that high fluid pressure size is ceramic material doubly.
The hydraulic pressure material adopting is low-viscosity (mobile) liquid.
In Grinding Process, high hydrostatic device remains unchanged to engineering ceramics applied pressure size.
With emery wheel, ceramic workpiece is carried out to grinding, the wear particle size of emery wheel number is greater than 300 orders.
The present invention has following technique effect, and 1, the formation and spreading of high quiet fluid pressure median crack when can reduce or suppress grinding, thus reduce grinding damage, improve the crudy of ceramic component and the reliability of use.2, with respect to common grinding, because the quiet fluid pressure of height can overcome the tension producing in grinding, in the quiet liquid of height is pressed grinding, form median crack damage and need larger grinding force, therefore, under same equivalent damage condition, high quiet liquid presses grinding to allow larger grinding parameter, thereby can improve the grinding efficiency of engineering ceramics, realizes the high efficient grinding processing under low damage condition.3, due to the quiet liquid of height, press the engineering ceramics device of grinding, its sub-surface there will not be median crack, or the median crack degree of depth is very little, can greatly reduce the process time of follow-up polishing process, greatly improve the production efficiency of ceramic component, reduce the processing cost of ceramic component.4, the quiet liquid of height of engineering pottery presses grinding to reduce the machining damage of engineering ceramics, has improved the working (machining) efficiency of engineering ceramics, thereby can reduce the manufacturing cost of ceramic component.The popularization of the method will further promote the extensive use of engineering ceramics device.
Accompanying drawing explanation
Fig. 1 is that while adopting traditional method for grinding, abrasive particle scratching pottery is removed material schematic diagram.
Fig. 2 is that while adopting high hydrostatic method for grinding, abrasive particle scratching pottery is removed material schematic diagram.
Fig. 3 is the schematic diagram of the high hydrostatic grinding of engineering ceramics.0 axis that is emery wheel in figure, the rotating speed that ω is emery wheel, emery wheel can be done feeding along Z-direction, and engineering ceramics workpiece can be done feeding along X, Y direction in X, Y plane, and P is the fluid pressure putting on engineering ceramics workpiece.
The specific embodiment
Cardinal principle of the present invention is: take impression fracture mechanics and plastoelasticity as theoretical foundation, during traditional grinding, abrasive particle to ceramic scratching effect schematic diagram as shown in Figure 1.Median crack is expanded under material surface, is the principal element that affects Mechanical Property of Ceramics; Transversal crack can expand to form to material surface the removal of material, less on material mechanical performance impact, and suppressing pottery damage is mainly the formation and spreading that suppresses median crack.During high hydrostatic pressure grinding pottery, abrasive particle to ceramic scratching effect schematic diagram as shown in Figure 2.Ceramic grinding carries out under high hydrostatic pressure environment, and three-dimensional high hydrostatic pressure is producing larger compression field in ceramic test piece, thereby can overcome the tension that the effect of abrasive particle scratching causes, thereby reduces or suppress the formation and spreading of median crack.
Below by specific embodiment, the present invention is described in further detail.
As shown in Figure 3.A kind of hydrostatic method for grinding of height of engineering ceramics high-efficiency low-damage, engineering ceramics is silicon carbide ceramics, silicon carbide ceramics sample dimensions is 20 * 15 * 10mm, the compression strength that records silicon carbide ceramics is 2000MPa, silicon carbide ceramics test specimen is placed in high hydrostatic device, the high fluid pressure value 200-400MPa of high hydrostatic device, high hydrostatic liquid is kerosene, with emery wheel, silicon carbide ceramics test specimen is carried out to grinding, grinding technique parameter is: grinding wheel speed 3000r/min, table feed speed is 300-1200mm/min, the wheel grinding degree of depth is 5-20 μ m, grinding wheel diameter is 75mm, model is SDN100V600.The sub-surface of silicon carbide ceramics after high hydrostatic pressure grinding does not have obvious median crack damage layer, sub-surface only has the metamorphic layer of 5-10 micron left and right, there is the refinement phenomenon of crystal grain in metamorphic layer, this is the synthesis result that abrasive particle contact zone local material has produced complicated plastic deformation and transversal crack expansion.
Claims (6)
1. the hydrostatic method for grinding of the height of an engineering ceramics high-efficiency low-damage, it is characterized in that: the compression strength of first determining processed ceramic material, then ceramic workpiece is placed in high hydrostatic device, ceramic workpiece is applied to high fluid pressure, under the quiet liquid pressurized state of height, ceramic workpiece is carried out to grinding.
2. the hydrostatic method for grinding of the height of a kind of engineering ceramics high-efficiency low-damage according to claim 1, is characterized in that: ceramic workpiece X, Y, Z three-dimensional are applied to high fluid pressure.
3. according to the hydrostatic method for grinding of height of a kind of engineering ceramics high-efficiency low-damage described in claim 1,2, it is characterized in that: apply the 0.05-0.5 of the compression strength that high fluid pressure size is ceramic material doubly.
4. according to the quiet liquid hydraulic pressure of the height method for grinding of a kind of engineering ceramics high-efficiency low-damage described in claim 1,2, it is characterized in that: the hydraulic pressure material adopting is low-viscosity (mobile) liquid.
5. the hydrostatic method for grinding of the height of a kind of engineering ceramics high-efficiency low-damage according to claim 1, is characterized in that: in Grinding Process, high hydrostatic device remains unchanged to engineering ceramics applied pressure size.
6. the hydrostatic method for grinding of the height of a kind of engineering ceramics high-efficiency low-damage according to claim 1, is characterized in that: with emery wheel, ceramic workpiece is carried out to grinding, the wear particle size of emery wheel number is greater than 300 orders.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104889763A (en) * | 2015-06-18 | 2015-09-09 | 哈尔滨工业大学 | Pressure-assistant thin-wall blank precise processing method |
| CN106965042A (en) * | 2017-03-28 | 2017-07-21 | 深圳市长盈精密技术股份有限公司 | The method for grinding of ceramic workpiece |
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| JPH04115859A (en) * | 1990-09-06 | 1992-04-16 | Sumitomo Electric Ind Ltd | Grinding method for si3n4 ceramics and work product thereof |
| US5564966A (en) * | 1993-11-08 | 1996-10-15 | Sumitomo Electric Industries, Ltd. | Grind-machining method of ceramic materials |
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| CN101564826A (en) * | 2009-05-11 | 2009-10-28 | 湘潭大学 | Prestress grinding processing method of ceramic material |
| CN102310487A (en) * | 2011-09-08 | 2012-01-11 | 田欣利 | Method for controlling processing edge breakage of ceramic material by applying prestress in circumferential wrapping way |
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2013
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04115859A (en) * | 1990-09-06 | 1992-04-16 | Sumitomo Electric Ind Ltd | Grinding method for si3n4 ceramics and work product thereof |
| US5564966A (en) * | 1993-11-08 | 1996-10-15 | Sumitomo Electric Industries, Ltd. | Grind-machining method of ceramic materials |
| CN1219452A (en) * | 1997-12-11 | 1999-06-16 | 曾绍谦 | Isobaric plasticity grinding process |
| CN1788931A (en) * | 2005-12-23 | 2006-06-21 | 湖南大学 | Highly effective deep-grinding process for engineering ceramic material |
| CN101126118A (en) * | 2006-06-23 | 2008-02-20 | 普拉德研究及发展公司 | Autofrettage process for a pump fluid end |
| CN101564826A (en) * | 2009-05-11 | 2009-10-28 | 湘潭大学 | Prestress grinding processing method of ceramic material |
| CN102310487A (en) * | 2011-09-08 | 2012-01-11 | 田欣利 | Method for controlling processing edge breakage of ceramic material by applying prestress in circumferential wrapping way |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104889763A (en) * | 2015-06-18 | 2015-09-09 | 哈尔滨工业大学 | Pressure-assistant thin-wall blank precise processing method |
| CN104889763B (en) * | 2015-06-18 | 2017-03-01 | 哈尔滨工业大学 | A kind of pressure assists thin-walled blank precision machining method |
| CN106965042A (en) * | 2017-03-28 | 2017-07-21 | 深圳市长盈精密技术股份有限公司 | The method for grinding of ceramic workpiece |
| CN106965042B (en) * | 2017-03-28 | 2019-10-29 | 深圳市长盈精密技术股份有限公司 | The method for grinding of ceramic workpiece |
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Application publication date: 20140409 |