CN101069961B - Re-griding-cutting cube boron-nitride grinding-block device - Google Patents
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- CN101069961B CN101069961B CN2007100421284A CN200710042128A CN101069961B CN 101069961 B CN101069961 B CN 101069961B CN 2007100421284 A CN2007100421284 A CN 2007100421284A CN 200710042128 A CN200710042128 A CN 200710042128A CN 101069961 B CN101069961 B CN 101069961B
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Abstract
An automatic grinder device and the preparation method of grindstones relates to the mechanical field. It specially relates to a heavy grinding cubic boron nitride grindstone device of the heavy grinding double-sided high precision automatic grinder of various brake discs in automobile and aircraft aviation industry and the preparation method of its seat and grindstone. The device is composed of a seat, a grinder device and five cylinder CBN grindstones embedded on the alloy seat. The method contains preparation technology of the alloy seat, the sintering technology, fastening and binding method of five CBN grindstones. It mainly resolves the technologies of CBN grindstones device and the preparation method of its seat and grindstones. With its characterizes of multi-point cutting capability and small cutting resistibility, the invention has advantages of convenient clamping, strong rigidity, convenient tool setting and grinding at initial stage and high efficiency.
Description
Technical field
The present invention relates to a kind of equipment of fully automatic grinder of mechanical field and the preparation method of pedestal and abrading block thereof, refer to especially a kind of be mainly used in the automobile industry to cut with heavily grinding of Double End high accuracy fully automatic grinder based on heavily grinding of the aeroplane brake discs of the various brake discs of four-wheel car and aircraft aircraft industry cut preparation method with cube boron-nitride grinding-block device and pedestal and abrading block.
Background technology
Existing application mostly is the GC or the WA abrading block of integral type greatly in the module of the high-grade grinding machine of the Double End of high precision, high stock removal rate, and it wears no resistance, easily takes place eccentric wear, the life-span is short and must frequently change.For addressing this problem, the part grinding machine has adopted split type CBN (Cubic Boron Nitride) grinding tool, but existing split type CBN grinding tool adopts pedestal and the bonding structure of module flat, its bond area is little, and a little less than the adhesive force, abrading block easily flew out when unusual the collision taken place, cause danger, in the time of need consuming than the farm labourer during installation, during the replacement cost of the fixing back of grinding tool, the use of module still has problems such as waste.
Common grinding process consists predominantly of: 1, the capacity of equipment of grinding machine comprises main shaft precision, power, little feeding ability; 2, frock ability comprises the location of datum level, the compound mode 3 of anchor clamps, the setting of grinding parameter and the selection of cutting fluid; 4, the selection of grinding tool comprises the selection of cubic boron nitride CBN abrading block, and this combination produces directly and decisive influence grinding process.
The cubic boron nitride CBN abrading block that uses generally is a rectangle integral body at present. the whole cubic boron nitride CBN of original rectangle abrading block weak point is: cutting resistance is big, easily causes machine spindle current strength to raise and forms burden; In addition, because be whole square, produce the position dullness of grinding sharp sword, machinability is difficult to performance.Moreover, reach weak points such as benefit is low a little less than also obviously having clamping fixing point, pedestal installation and fastening method etc. all to exist inconvenience, rigidity, particularly to realize the grinding process of " heavily grind and cut " and " Double End ", for example: when processing automobile brake disc or aeroplane brake discs, to processing after flatness and beat, the thickness difference index is very high requirement, so how to select follow-on cubic boron nitride CBN abrading block, seems particularly important; In addition, in the sintering of cubic boron nitride CBN abrading block and the basic demand in the manufacturing process, existing influences temperature curve, influences problems such as immanent structure and hold.
Summary of the invention
In order to overcome above-mentioned weak point, main purpose of the present invention aims to provide a kind of kind of five cylindrical cubic boron nitride CBN grinding tool bodies of inlaying on precision machined aluminium alloy pedestal, make it both to have multiple spot machinability performance and cutting resistance less CBN grinding tool piece, can realize convenient mounting and clamping again, rigidity is strong and increase the benefit heavily grind to cut and use cube boron-nitride grinding-block device.
Another object of the present invention aims to provide the fastening associated methods between 5 of the preparation sintering process of 5 of a kind of preparation technology, cube boron-nitride grinding-blocks by the aluminium alloy pedestal and aluminium alloy pedestal and the cube boron-nitride grinding-blocks, realize cubic boron nitride CBN abrading block the preparation method heavily grind the preparation method who cuts usefulness cube boron-nitride grinding-block device and pedestal and abrading block.
The technical problem to be solved in the present invention is: mainly solve the arc R face of clamping fixing point, aluminium alloy pedestal and the installation question of CBN columned sinter and aluminium alloy sole piece; Also to solve the making and the various tolerance fit problem of each parts, make the CBN cylinder have stronger impact resistance, and keep hardness comparatively uniformly; To solve the aluminium alloy pedestal again and will be arc R face, how be convenient to mix, produce the overlapping curve effect problem that grinds when cutting with the movement locus of grinding wheel flange dish; After solving the preparation sintering of 5 of cube boron-nitride grinding-blocks, the combination of abrading block and abrasive disc can be tightr, and can keep high track to grind the rigidity and the security of cutting; Solve between 5 of aluminium alloy pedestal and the cube boron-nitride grinding-blocks and how fasteningly to combine and how to reduce relevant technologies problem such as clamping tool setting time.
The technical solution adopted for the present invention to solve the technical problems is: this device is made up of parts such as pedestal, grinding machine equipment, grinding tool, square abrading block and each fixture components, edge kind of five cylindrical cubic boron nitride CBN grinding tool bodies on precision machined aluminium alloy pedestal, the cubic boron nitride CBN abrading block that is combined as a whole, wherein:
The bonding embedding cube boron-nitride grinding-block of difference is 5 in end edge kind of the location hole of aluminium alloy pedestal, and each hole size of edge kind of location hole mates mutually with the size of 5 diameters of cube boron-nitride grinding-block respectively;
Be provided with two bolts that are installed up and down in the centre position of aluminium alloy pedestal, be installed bolt and grinding machine equipment are connected and fixed;
Indent clamping positioning runner is set in the both sides of aluminium alloy pedestal, and the aluminium alloy pedestal embeds coupling mutually by indent clamping positioning runner and jockey on the grinding machine equipment and is connected.
The described heavy top of cutting with the indent clamping positioning runner of cube boron-nitride grinding-block device of grinding is provided with epitaxial ledge, and indent clamping positioning runner and epitaxial ledge machining are one.
Described heavy 5 of the cube boron-nitride grinding-blocks of cutting with cube boron-nitride grinding-block device that grind have two kinds of different diameters, and middle 3 cylinders are same diameter, and diameter value is greater than the cylinder diameter that is distributed in both sides, and the center of circle is on same straight line; 2 cylinders that are distributed in both sides are same diameter, and the center of circle is on same straight line, and these 5 columniform combinations have constituted the whole face of an outer arcuate.
The described heavy bolt of cutting with cube boron-nitride grinding-block device that is installed that grinds is provided with oval outer hole and endoporus, is mutual match and regulate between the jockey on aluminium alloy pedestal and the grinding machine equipment.
The described heavy centre position of cutting with the jockey on the grinding machine equipment of cube boron-nitride grinding-block device of grinding is provided with the fastening bolt of two circles up and down, is mutual match and regulate between jockey on the grinding machine equipment and the aluminium alloy pedestal.
A kind of heavy preparation method who cuts with cubic boron nitride pedestal and abrading block that grinds, this method comprises:
A. the preparation technology of aluminium alloy pedestal;
B. the preparation sintering process of 5 of cube boron-nitride grinding-blocks;
C. the fastening associated methods between 5 of aluminium alloy pedestal and the cube boron-nitride grinding-blocks is realized the preparation method of cubic boron nitride CBN abrading block, wherein:
A. the preparation technology of aluminium alloy pedestal (4) mainly may further comprise the steps:
The selection module comprises: there is imperforate detection aluminum alloy material ADC12 and inside; The selection process is: determine the material ADC12 of Al-alloy metal pedestal, the section bar to the aluminium alloy selected carries out carrying out flaw detection simultaneously, and whether make clear has inner residual scar and excessive pore in the section bar;
The processing of step 2. shape
After executing the selection module, then enter the shape processing module, the shape processing module comprises: the selection of length * wide * high size and R arc size; Mainly the aluminium alloy extrusions that chooses is carried out the machine cut processing of overall dimensions length, and on this basis, finish the R arc processing in aluminium alloy pedestal front;
The processing of step 3. local size
After executing shape processing, then enter the local size processing module, the local size processing module comprises: groove processing and hole processing; Mainly to the inner groovy machining of indent clamping positioning runner, the dimensioned of the bolt that is installed and edge are planted the processing of the edge kind receiving hole of location hole, the inside and outside oval processing of the Kong Weike mediation of the bolt that wherein is installed;
After executing local size processing, then enter the fine finishining module, finish tolerance fit, the fine finishining module comprises: the concentricity requirement in edge CBN position, cylindrical hole and five holes; The position degree and the degree of depth and relevant fit tolerance of edge kind of the cylindrical edge kind of cubic boron nitride location hole; And 5 holes in edge kind of the location hole processs respectively, concentric circles processing is carried out in middle 3 holes, and 2 circular holes in the outside are made concentric circles and are processed, and middle 3 are different with 2 hole circle diameters in the outside, three holes are big slightly in presenting, and two holes, the outside are smaller, thereby the arc that forms on the external form profile is linear;
After executing the fine finishining module, then enter the surface treatment module, the surface treatment module comprises: burr is handled and by external force or release surface stress; Mainly the remaining burr of shape processing, local size processing and the processing of fine finishining machinery is handled, sprayed small glass ball by mechanical external force simultaneously, the moulding aluminium alloy pedestal after the processing is carried out the release of surface stress;
The specially treated in step 6. edge kind of hole
After executing shape processing, local size processing, fine finishining and surface treatment machinery procedure of processing respectively, the specially treated module that then enters edge kind of hole, the specially treated in edge kind of hole comprises: the detection of ungrease treatment and bonding mating surface; Mainly the residual grease to edge kind of location hole aluminum alloy surface cleans, and the inboard fit tolerance of removing edge kind of location hole detects;
After executing the specially treated module in edge kind of hole, then enter bending resistance or transverse strength tentative module, bending resistance or transverse strength test comprise: whether meet the affirmation of dynamic machining requirement and security; Mainly the aluminium alloy pedestal after the machining is carried out various strength tests;
B. the preparation sintering process of 5 of cube boron-nitride grinding-blocks
The preparation sintering process that cube boron-nitride grinding-block is 5 is through super-dry, deoxidation, classification, stirring, prepackage, pattern and divide the class sintering step, finishes the making of cubic boron nitride CBN abrading block solid state sintering body; Mainly may further comprise the steps:
The module of selecting materials comprises: the selection of the selection of abrasive particle and metal and non-metal powder; Mainly to raw-material preferred: select micron order cobalt, nickel, manganese, copper, tin, molybdenum, vanadium, silver, titanium, zinc, platinum, chromium metal dust for use, the cubic boron nitride CBN abrasive particle of various dusty materials such as pottery, mineral crystal powder, aluminium oxide and cubic boron nitride CBN monocrystalline abrasive particle, polycrystalline grits or the processing of special coating;
Step 2. drying
After executing the module of selecting materials, then enter irradiation modules, irradiation modules comprises: dehumidifying and vacuum drying; Mainly metal dust is carried out drying and handle, to control its humidity at normal temperatures;
After executing irradiation modules, then enter the deoxidation module, the deoxidation module comprises: reduction apparatus; Mainly metal dust is carried out deoxidation treatment, the stability during with the assurance sintering;
The common stirring of step 4.
After executing the deoxidation module, then enter common stirring module;
The three-dimensional alr mode of step 5. sealing
After executing common stirring module, then enter the three-dimensional material mode module that stirs of sealing; Mainly to the metal dust of dry and deoxidation and non-metal powder in vacuum tank, carry out the abundant stirring of three-dimensional by equipment;
After executing the three-dimensional stirring of sealing material mode module, then enter and stir back powder metering module; In the powder body after fully stirring, add a certain proportion of cubic boron nitride CBN abrasive particle, carry out vacuum stirring once more by measuring requirement;
The quantitative stirring of step 7. and CBN abrasive particle
After executing stirring back powder metering module, then enter quantitative stirring module with cubic boron nitride CBN abrasive particle; Adding granularity in the powder that the powder metering process is finished after stirring is 140
#～270
#The cubic boron nitride CBN abrasive particle that does not wait, proportion is 2%～10%; After the metal dust material adding cubic boron nitride CBN abrasive particle sealing that has stirred, the three-dimensional of carrying out X, Y, Z direction once more stirs;
Step 8. metering prepackage
After executing the quantitative stirring module with the CBN abrasive particle, then enter metering prepackage module; Select for use the prepackage grinding tool to above-mentioned pine dress powder body pre-install, pattern;
A precompressed of step 9.
After executing metering prepackage module, then enter preloaded module one time; The mixture of the metal dust that stirs and cubic boron nitride CBN abrasive particle is packed in the metal die, carry out pre-molding, the pulverulence of mould dress is pressed into a roughly formation solid shape in advance;
The formal sintering of step 10.
After executing preloaded module, then enter formal sintering module; Finish moving into the extremely strong die device of special-purpose electric conductivity, insert in the vacuum-sintering machine; Insert formal mould earlier, and put into special-purpose vacuum heating-press sintering machine stove, heat, pressurize, regularly, the sintering process of vacuum, temperature are controlled between 900 °～1100 ° usually;
Step 11. feeds inert nitrogen gas
After executing formal sintering module, then enter and feed the inert nitrogen gas module;
Step 12. vacuum starts
After executing feeding inert nitrogen gas module, then enter vacuum and start module;
Step 13. vacuum and nitrogen injection hocket
Execute after vacuum starts module, then enter vacuum and the nitrogen injection module that hockets;
Step 14. sintering is finished the demoulding
Execute vacuum and nitrogen injection and hocket after the module, then enter sintering and finish demoulding module; To carry out the demoulding after sintering is finished and handle, be specially the gap location that releasing agent is sprayed into mould and sintered body, mould and sintered body are separated from each other;
The surfaction of step 15. sintered body is handled
Execute after sintering finishes the demoulding module surfaction processing module that then enters sintered body; Remove the sintering rear surface in skin and oxide layer, take off magnetic, spray the glass piller and carry out surperficial sintering stress and eliminate;
The whole shaping of step 16.
After executing the surfaction processing module of sintered body, then enter whole Shaping Module; With sintered body locate superficial layer deoxidation layer and geomery, tolerance are carried out machining, be cutting and grinding means;
Step 17. is worked into fitted position
After executing whole Shaping Module, then enter and be worked into the fitted position module; Till five column type sintered bodies are worked in the specially treated with the edge kind hole of aluminium alloy pedestal edge kind of a location hole and can carry out the bonding physical dimension that cooperates;
C. the fastening associated methods between 5 of aluminium alloy pedestal and the cube boron-nitride grinding-blocks mainly may further comprise the steps:
Preparation is 5 of cube boron-nitride grinding-blocks through 5 cylinders of two kinds of specifications that sintering and reconditioning shaping form;
Step 2. is prepared the machined goods
Prepare to carry out bonding the cooperation, and can finish the alloy matrix aluminum of size cooperation through processing with 5 of cube boron-nitride grinding-blocks;
Preparation allows between 5 of cube boron-nitride grinding-blocks and the alloy matrix aluminum, can finish fastening bonding and can resist the special-purpose high strength bonding agent of aluminium alloy of powerful impulsive force;
By to HTHP Mould design, making and various tolerance fit, and take into full account the coefficient of expansion of 5 of cube boron-nitride grinding-blocks, alloy matrix aluminum and high strength bonding agent, the coefficient of expansion of 5 of cube boron-nitride grinding-blocks and alloy matrix aluminum must and the high strength bonding agent between the coefficient of expansion be close, and to keep it be between 160 ℃-180 ℃ in temperature, be 4～5 hours hardening time, the bonding curing that can also remain unchanged shape, and finish fastening bonding by frock clamp;
To the whole cubic boron nitride CBN abrading block of bonding curing, carry out bending strength and impulsive force test from upper and lower and front, rear, left and right six direction;
Shaping, reconditioning, weight is finished the cooperation of intensity, balance and machinability performance;
Select equipment and the workpiece suitable for use, adopt and the different mode of formal wet-milling processing, be the dry grinding mode, check its thermal deformation resistant ability with processing conditions; Cooling fluid during wet-milling is situated between and exists, and does not exist and have cooling fluid to be situated between during dry grinding; Thermal deformation resistant ability for checking cubic boron nitride CBN combination abrading block.
The invention has the beneficial effects as follows: cylindrical cubic boron nitride CBN grinding tool body has multiple spot machinability performance and cutting resistance features of smaller; The aluminium alloy pedestal is an arc R face, is convenient to mix with the movement locus of grinding wheel flange dish, produces the overlapping curve effect of grinding when cutting; The use soket head cap screw is fastening, can prevent to add the Al alloy block that man-hour, accident collision caused and fly out, and prevents the accident potential that causes because of flying out; The combination of CBN abrading block and abrasive disc is tightr, and can keep φ 760～800; 500rpm～1100rpm/min high speed, track grind the rigidity and the security of cutting, and are suitable for volume production pattern automatically in enormous quantities; 2 bolts hole on the aluminium alloy pedestal, the internal concave hopper chute of matrix both sides, and the clamping positioning step of matrix upper end make clamping very convenient, reduce the clamping tool setting time greatly.Draw the man-hour that reduce this part after the measuring and calculating man-hour is about 40%; Have convenient mounting and clamping, rigidity is strong, the convenient and high efficiency of initial stage tool setting and reconditioning; Preparation method of the present invention has cylindrical cubic boron nitride CBN and grinds the advantage of cutting body, and promptly multiple spot grinds and cuts grinding of post and cut superiority, especially to the advantage performance of various metal materials;
Have the advance of bonding and curing mode and the advanced technologies characteristics of the favourable dynamic balancing of balanced weight.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Overall structure schematic diagram when accompanying drawing 1 is worked for the present invention;
Overall structure schematic diagram when accompanying drawing 2 is not worked for the present invention;
Accompanying drawing 3 is the profile perspective view of aluminium alloy pedestal of the present invention;
Accompanying drawing 4 is the preparation technology flow chart of cubic boron nitride CBN abrading block of the present invention with the aluminium alloy pedestal;
Accompanying drawing 5 is the preparation sintering process flow chart of cubic boron nitride CBN abrading block of the present invention;
Label declaration in the accompanying drawing:
1-indent clamping positioning runner; 21-selects materials;
The 2-jockey; The 22-drying;
The 3-bolt that is installed; The 23-deoxidation;
4-aluminium alloy pedestal; The common stirring of 24-;
The 5-brake disc; 25-seals three-dimensional alr mode;
5 of 6-cube boron-nitride grinding-blocks; 26-stirs back powder metering;
The 7-epitaxial ledge; The quantitative stirring of 27-and CBN abrasive particle;
8-edge kind of location hole; 28-measures prepackage;
The 9-fastening bolt; A precompressed of 29-;
10-cubic boron nitride CBN abrading block; The formal sintering of 30-;
The 11-selection; 31-feeds inert nitrogen gas;
The processing of 12-shape; The 32-vacuum starts;
The processing of 13-local size; 33-vacuum and nitrogen injection hocket;
14-fine finishining; The 34-sintering is finished the demoulding;
The 15-surface treatment; The surfaction of 35-sintered body is handled;
The specially treated in 16-edge kind of hole; The whole shaping of 36-;
17-bending resistance or transverse strength test; 37-is worked into fitted position.
The specific embodiment
See also shown in the accompanying drawing 1,2,3, the present invention is made up of parts such as pedestal, grinding machine equipment, grinding tool, square abrading block and each fixture components, this device is edge kind of five cylindrical cubic boron nitride CBN grinding tool bodies on precision machined aluminium alloy pedestal 4, the cubic boron nitride CBN abrading block 10 that is combined as a whole, wherein:
The bonding embedding cube boron-nitride grinding-block of difference is 56 in end edge kind of the location hole 8 of aluminium alloy pedestal 4, and each hole size of edge kind of location hole 8 mates mutually with the size of 56 diameters of cube boron-nitride grinding-block respectively;
Be provided with two bolts 3 that are installed up and down in the centre position of aluminium alloy pedestal 4, the bolt 3 that is installed is connected and fixed with grinding machine equipment;
Indent clamping positioning runner 1 is set in the both sides of aluminium alloy pedestal 4, and aluminium alloy pedestal 4 mates with the jockey 2 mutual embeddings on the grinding machine equipment by indent clamping positioning runner 1 and is connected.
The described heavy top of cutting with the indent clamping positioning runner 1 of cube boron-nitride grinding-block device of grinding is provided with epitaxial ledge 7, and indent clamping positioning runner 1 is an one with epitaxial ledge 7 machinings.
Described heavy 56 of the cube boron-nitride grinding-blocks of cutting with cube boron-nitride grinding-block device that grind have two kinds of different diameters, and middle 3 cylinders are same diameter, and diameter value is greater than the cylinder diameter that is distributed in both sides, and the center of circle is on same straight line; 2 cylinders that are distributed in both sides are same diameter, and the center of circle is on same straight line, and these 5 columniform combinations have constituted the whole face of an outer arcuate.
The described heavy bolt of cutting with cube boron-nitride grinding-block device 3 that is installed that grinds is provided with oval outer hole and endoporus, is mutual match and regulate between the jockey on aluminium alloy pedestal 4 and the grinding machine equipment 2.
The described heavy centre position of cutting with the jockey on the grinding machine equipment of cube boron-nitride grinding-block device 2 of grinding is provided with the fastening bolt 9 of two circles up and down, is mutual match and regulate between jockey on the grinding machine equipment 2 and the aluminium alloy pedestal 4.
See also shown in the accompanying drawing 4,5, a kind of heavy preparation method who cuts with cubic boron nitride pedestal and abrading block that grinds, this method comprises following three parts:
A. the preparation technology of aluminium alloy pedestal 4;
B. the preparation sintering process of 56 of cube boron-nitride grinding-blocks;
C. the fastening associated methods between 56 of aluminium alloy pedestal 4 and the cube boron-nitride grinding-blocks is realized the preparation method of cubic boron nitride CBN abrading block 10, wherein:
A. the preparation technology of aluminium alloy pedestal 4 mainly may further comprise the steps:
Selection 11 modules comprise: there is imperforate detection aluminum alloy material ADC12 and inside; The selection process is: determine the material ADC12 of Al-alloy metal pedestal, the section bar to the aluminium alloy selected carries out carrying out flaw detection simultaneously, and whether make clear has inner residual scar and excessive pore in the section bar;
Step 2. shape processing 12
After executing selection 11 modules, then enter shape and process 12 modules, shape is processed 12 modules and is comprised: the selection of length * wide * high size and R arc size; Mainly the aluminium alloy extrusions that chooses is carried out the machine cut processing of overall dimensions length, and on this basis, finish the R arc processing in aluminium alloy pedestal 4 fronts;
After executing shape processing 12, then enter local size and process 13 modules, local size is processed 13 modules and is comprised: groove processing and hole processing; Mainly to the inner groovy machining of indent clamping positioning runner 1, the dimensioned of the bolt 3 that is installed and edge are planted the processing of the edge kind receiving hole of location hole 8, the inside and outside oval processing of the Kong Weike mediation of the bolt 3 that wherein is installed;
After executing local size processing 13, then enter fine finishining 14 modules, finish tolerance fit, fine finishining 14 modules comprise: the concentricity requirement in edge CBN position, cylindrical hole and five holes; The position degree and the degree of depth and relevant fit tolerance of edge kind of the cylindrical edge kind of cubic boron nitride location hole 8; And 5 holes in edge kind of the location hole 8 processs respectively, concentric circles processing is carried out in middle 3 holes, and 2 circular holes in the outside are made concentric circles and are processed, and middle 3 are different with 2 hole circle diameters in the outside, three holes are big slightly in presenting, and two holes, the outside are smaller, thereby the arc that forms on the external form profile is linear;
After executing fine finishining 14 modules, then enter surface treatment 15 modules, surface treatment 15 modules comprise: burr is handled and by external force or release surface stress; Mainly the remaining burr of shape processing 12, local size processing 13 and fine finishining 14 machinings is handled, sprayed small glass ball by mechanical external force simultaneously, the moulding aluminium alloy pedestal after the processing is carried out the release of surface stress;
The specially treated 16 in step 6. edge kind of hole
After executing shape processing 12, local size processing 13, fine finishining 14 and surface treatment 15 mechanical processing steps respectively, specially treated 16 modules that then enter edge kind of hole, the specially treated 16 in edge kind of hole comprises: the detection of ungrease treatment and bonding mating surface; Mainly the residual grease to edge kind of location hole 8 aluminum alloy surface cleans, and the inboard fit tolerance of removing edge kind of location hole 8 detects;
After executing specially treated 16 modules in edge kind of hole, then enter bending resistance or transverse strength and test 17 modules, bending resistance or transverse strength test 17 comprise: whether meet the affirmation of dynamic machining requirement and security; Mainly the aluminium alloy pedestal after the machining 4 is carried out various strength tests;
B. the preparation sintering process of 56 of cube boron-nitride grinding-blocks
The preparation sintering process that cube boron-nitride grinding-block is 56 is through super-dry, deoxidation, classification, stirring, prepackage, pattern and divide the class sintering step, finishes the making of cubic boron nitride CBN abrading block 10 solid state sintering bodies; Mainly may further comprise the steps:
21 modules of selecting materials comprise: the selection of the selection of abrasive particle and metal and non-metal powder; Mainly to raw-material preferred: select micron order cobalt, nickel, manganese, copper, tin, molybdenum, vanadium, silver, titanium, zinc, platinum, chromium metal dust for use, the cubic boron nitride CBN abrasive particle of various dusty materials such as pottery, mineral crystal powder, aluminium oxide and cubic boron nitride CBN monocrystalline abrasive particle, polycrystalline grits or the processing of special coating;
Step 2. drying 22
After executing 21 modules of selecting materials, then enter dry 22 modules, dry 22 modules comprise: dehumidifying and vacuum drying; Mainly metal dust is carried out drying and handle, to control its humidity at normal temperatures;
After executing dry 22 modules, then enter deoxidation 23 modules, deoxidation 23 modules comprise: reduction apparatus; Mainly metal dust is carried out deoxidation treatment, the stability during with the assurance sintering;
The common stirring 24 of step 4.
After executing deoxidation 23 modules, then enter common stirring 24 modules;
The three-dimensional alr mode 25 of step 5. sealing
After executing common stirring 24 modules, then enter three-dimensional material mode 25 modules that stir of sealing; Mainly to the metal dust of dry and deoxidation and non-metal powder in vacuum tank, carry out the abundant stirring of three-dimensional by equipment;
After executing the three-dimensional stirring of sealing material mode 25 modules, then enter stirring back powder and measure 26 modules; In the powder body after fully stirring, add a certain proportion of cubic boron nitride CBN abrasive particle, carry out vacuum stirring once more by measuring requirement;
The quantitative stirring 27 of step 7. and CBN abrasive particle
Execute stir the back powder and measure 26 modules after, then enter quantitative stirring 27 modules with cubic boron nitride CBN abrasive particle; Adding granularity in the powder that powder 26 processes of measuring are finished after stirring is 140
#～270
#The cubic boron nitride CBN abrasive particle that does not wait, proportion is 2%～10%; After the metal dust material adding cubic boron nitride CBN abrasive particle sealing that has stirred, the three-dimensional of carrying out X, Y, Z direction once more stirs;
Step 8. metering prepackage 28
After executing quantitative stirring 27 modules with the CBN abrasive particle, then enter metering prepackage 28 modules; Select for use the prepackage grinding tool to above-mentioned pine dress powder body pre-install, pattern;
A precompressed 29 of step 9.
After executing metering prepackage 28 modules, then enter precompressed 29 modules one time; The mixture of the metal dust that stirs and cubic boron nitride CBN abrasive particle is packed in the metal die, carry out pre-molding, the pulverulence of mould dress is pressed into a roughly formation solid shape in advance;
The formal sintering 30 of step 10.
After executing precompressed 29 module, then enter formal sintering 30 modules; Finish moving into the extremely strong die device of special-purpose electric conductivity, insert in the vacuum-sintering machine; Insert formal mould earlier, and put into special-purpose vacuum heating-press sintering machine stove, heat, pressurize, regularly, the sintering process of vacuum, temperature are controlled between 900 °～1100 ° usually;
Step 11. feeds inert nitrogen gas 31
After executing formal sintering 30 modules, then enter and feed inert nitrogen gas 31 modules;
Step 12. vacuum starts 32
After executing feeding inert nitrogen gas 31 modules, then enter vacuum and start 32 modules;
Step 13. vacuum and nitrogen injection hocket 33
Execute after vacuum starts 32 modules, then enter vacuum and nitrogen injection 33 modules that hocket;
Step 14. sintering is finished the demoulding 34
Execute vacuum and nitrogen injection and hocket after 33 modules, then enter sintering and finish the demoulding 34 modules; To carry out the demoulding after sintering is finished and handle, be specially the gap location that releasing agent is sprayed into mould and sintered body, mould and sintered body are separated from each other;
The surfaction of step 15. sintered body handles 35
Execute after sintering finishes the demoulding 34 modules, the surfaction that then enters sintered body is handled 35 modules; Remove the sintering rear surface in skin and oxide layer, take off magnetic, spray the glass piller and carry out surperficial sintering stress and eliminate;
The whole shaping 36 of step 16.
After the surfaction that executes sintered body is handled 35 modules, then enter whole shaping 36 modules; With sintered body locate superficial layer deoxidation layer and geomery, tolerance are carried out machining, be cutting and grinding means;
Step 17. is worked into fitted position 37
After executing whole shaping 36 modules, then enter and be worked into fitted position 37 modules; Till five column type sintered bodies are worked in the specially treated 16 with the edge kind hole of aluminium alloy pedestal 4 edge kind of a location hole 8 and can carry out the bonding physical dimension that cooperates;
C. the fastening associated methods between 56 of aluminium alloy pedestal 4 and the cube boron-nitride grinding-blocks mainly may further comprise the steps:
5 cylinders of two kinds of specifications that preparation forms through sintering and reconditioning shaping are 56 of cube boron-nitride grinding-blocks;
Step 2. is prepared the machined goods
Prepare to carry out bonding the cooperation, and can finish the alloy matrix aluminum 4 of size cooperation through processing with 56 of cube boron-nitride grinding-blocks;
Preparation allows between 56 of cube boron-nitride grinding-blocks and the alloy matrix aluminum 4, can finish fastening bonding and can resist the special-purpose high strength bonding agent of aluminium alloy of powerful impulsive force;
By to HTHP Mould design, making and various tolerance fit, and take into full account the coefficient of expansion of 56 of cube boron-nitride grinding-blocks, alloy matrix aluminum 4 and high strength bonding agent, the coefficient of expansion of 56 of cube boron-nitride grinding-blocks and alloy matrix aluminum 4 must and the high strength bonding agent between the coefficient of expansion be close, and to keep it be between 160 ℃-180 ℃ in temperature, be 4～5 hours hardening time, the bonding curing that can also remain unchanged shape, and finish fastening bonding by frock clamp;
To the whole cubic boron nitride CBN abrading block of bonding curing, carry out bending strength and impulsive force test from upper and lower and front, rear, left and right six direction;
Shaping, reconditioning, weight is finished the cooperation of intensity, balance and machinability performance;
Select equipment and the workpiece suitable for use, adopt and the different mode of formal wet-milling processing, be the dry grinding mode, check its thermal deformation resistant ability with processing conditions; Cooling fluid during wet-milling is situated between and exists, and does not exist and have cooling fluid to be situated between during dry grinding; Thermal deformation resistant ability for checking cubic boron nitride CBN combination abrading block.
See also shown in the accompanying drawing 1, during work of the present invention, heavily grind and cut the upper and lower that is installed in grinding machine equipment with cube boron-nitride grinding-block respectively, workpiece brake disc 5 is set between the upper and lower of grinding machine equipment; Preferably: 24 of top installations are heavily ground to cut and are used cube boron-nitride grinding-block, and 24 of bottom installations are heavily ground to cut and used cube boron-nitride grinding-block.
Operation principle of the present invention and technical characterictic are:
Clamping fixing point of the present invention: on the bolt 3 that is installed, be provided with two points, epitaxial ledge 7, two internal concave hopper chutes of indent clamping positioning runner 1.
Its characteristics are: convenient mounting and clamping, and rigidity is strong, and initial stage tool setting and reconditioning are convenient, the efficient height.
The aluminium alloy pedestal is an arc R face.Be convenient to mix, produce the overlapping curve effect of grinding when cutting with the movement locus of grinding wheel flange dish.
The bolt 3 usefulness soket head cap screws that are installed are fastening, can prevent to add the Al alloy block that man-hour, accident collision caused and fly out, and prevent the accident potential that causes because of flying out.
The existence of the fastening of bolt 3 and indent clamping positioning runner 1 and epitaxial ledge 7 owing to be installed, the combination of epitaxial ledge 7, indent clamping positioning runner 1 and CBN abrading block and abrasive disc are tight more and can keep φ 760～800; 500～1100rpm/min is at a high speed. and track grinds the rigidity and the security of cutting.Be suitable for volume production pattern automatically in enormous quantities.
The reduction clamping tool setting time.Draw the man-hour about 40% that reduce this part after the measuring and calculating man-hour.
1.. cylindrical cubic boron nitride CBN abrading block can produce sharp cutting knife face when grinding, help eliminating because of workpiece grind bevel long-pending bring greatly to grind cut big this difficult problem of opposing.Improve the cutting benefit greatly, reduce processing under the equal allowance and grind and cut beat.
2.. no matter automobile brake disc or aeroplane brake discs (combined type), to the flatness after the processing and beat, the thickness difference index is very high request.And use cylindrical cubic boron nitride CBN grinding tool, just can bring into play it and easily produce the well-regulated cutting basil, and realize cutting with respect to the lower resistance of more bringing into play of other piece shape cubic boron nitrides CBN.
The present invention makes and various tolerance fit by to the HTHP Mould design, makes cubic boron nitride CBN cylinder have stronger impact resistance, and keeps hardness comparatively uniformly.The carcass of cubic boron nitride CBN abrading block (or claiming organizer) hardness is not less than HRB106, is not more than HRB108.
Take into full account first, second, third the coefficient of expansion, the coefficient of expansion of first, the second coefficient of expansion necessary and that strengthen between the bonding agent third is approaching in other words, and can keep in 4～5 hours hardening times, realizing indeformable bonding curing between its 160 ℃-180 ℃.
It is general all more than disposable bilateral 0.25～0.35mm heavily to grind the allowance cut, and the monolateral 0.15mm that is no less than grinds the time of cutting to be not more than 25 seconds.Add the index request of various surface accuracies and geometric accuracy, cubic boron nitride CBN abrasive particle has higher requirement, particularly Wen Dingxing requirement.In order to strengthen the stability of cubic boron nitride CBN abrasive particle, have auxilliary usually in physical treatment and chemical treatment.Promptly the crystalline form of CBN is made the choosing level and handle (and the methods that the choosing level is handled because of relating to core technology and commercial affairs secret, are not done open one by one).Moreover be exactly cubic boron nitride CBN to carry out the chemical treatment purpose be to improve its resistance to impact and wearability, handle such as various coating.The scientific research and the application level of the material specialized company of U.S. GE all are the highest in the world at present, and China also has than quantum jump in the industry in recent years.Individual species relies on beyond the GE company, and other industrial cubic boron nitride CBN abrasive particle all shows up-and-coming youngster's basic strength.
Organizer's (carcass) also claims the technical characterstic of bond:
Attach most importance to grinding and cut because grind the mode of cutting, so adopt pore-free cermet compound material.Cubic boron nitride CBN abrading block is to organize carcass by cubic boron nitride CBN abrasive particle and cermet, by high temperature, high pressure, vacuum-sintering, and a kind of solid state sintering body that common formation is got up.
Technical characterstic of the present invention:
1) metal powder composite material synthesizing cubic boron nitride CBN cylinder;
2) this product is at five cylindrical CBN grinding tool bodies on edge is planted on the precision machined aluminium alloy pedestal, constitutes one and has multiple spot machinability performance and the less CBN grinding tool piece of cutting resistance;
3) 2 bolts hole on the aluminium alloy pedestal, the internal concave hopper chute of matrix both sides, and the clamping positioning step of matrix upper end make clamping very convenient, reduce the clamping tool setting time greatly.Draw the man-hour about 40% that reduce this part after the measuring and calculating man-hour.
One of embodiment of sintering technology of the present invention:
Utilization numerical control agglomerating plant, setting vacuum quota, time graph, pressure curve, temperature curve, cooling curve carry out the Digital Control sintering process.According to the volume size of sinter, sintering time is about 15-30 minute in the sintering process.The variation of the pressure in the sintering process has bigger influence to the density and the stability of solid state sintering body; Variation of temperature exerts an influence to immanent structure, the hold of sintered body; Cool off too fast or cross fragility and the ductility to have influence on sintered body slowly.
Sintering temperature is at the 800-1100 degree, requires and the difference of the physicochemical characteristics of material self is set different temperature curves according to the cutting ability of abrading block material.The basic demand of solid state sintering and the grinding principle of grinding work piece also can influence the setting of temperature curve.
Claims (3)
1. one kind is heavily ground to cut and uses cube boron-nitride grinding-block device, described device is used for grinding machine equipment, this device comprises aluminium alloy pedestal and the abrading block of fixedlying connected with this aluminium alloy pedestal, it is characterized in that: go up edge kind of five cylindrical cubic boron nitride CBN abrading blocks at precision machined aluminium alloy pedestal (4), the cubic boron nitride CBN abrading block (10) that is combined as a whole, wherein:
Difference five cylindrical cube boron-nitride grinding-blocks of bonding embedding (6) in end edge kind of the location hole (8) of aluminium alloy pedestal (4), each hole size of edge kind of location hole (8) mates mutually with the size of five cylindrical cube boron-nitride grinding-blocks (6) diameter respectively;
Be provided with two bolts that are installed (3) up and down in the centre position of aluminium alloy pedestal (4), the bolt that is installed (3) is connected and fixed with grinding machine equipment;
In the both sides of aluminium alloy pedestal (4) indent clamping positioning runner (1) is set, aluminium alloy pedestal (4) is connected by the mutual coupling that embeds of indent clamping positioning runner (1) and the jockey (2) on the grinding machine equipment.
2. according to claim 1 heavy grind to cut use cube boron-nitride grinding-block device, it is characterized in that: the top of described indent clamping positioning runner (1) is provided with epitaxial ledge (7), indent clamping positioning runner (1) and epitaxial ledge (7) machining are one.
3. according to claim 1 and 2 heavy grind to cut use cube boron-nitride grinding-block device, it is characterized in that: the centre position of the jockey on the described grinding machine equipment (2) is provided with the fastening bolt (9) of two circles up and down, is mutual match and regulate between jockey on the grinding machine equipment (2) and the aluminium alloy pedestal (4).
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| CN2007100421284A CN101069961B (en) | 2007-06-18 | 2007-06-18 | Re-griding-cutting cube boron-nitride grinding-block device |
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| CN2007100421284A CN101069961B (en) | 2007-06-18 | 2007-06-18 | Re-griding-cutting cube boron-nitride grinding-block device |
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| CN101069961B true CN101069961B (en) | 2010-12-08 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102009010371A1 (en) | 2009-02-26 | 2010-09-02 | PMG Füssen GmbH | Powder metallurgical body and process for its preparation |
| CN102225529A (en) * | 2011-05-27 | 2011-10-26 | 云南光电辅料有限公司 | Cubic boron nitride honing tool and production method thereof |
| CN103182672A (en) * | 2011-12-27 | 2013-07-03 | 上海达特精密机械配件有限公司 | Honing stone as well as preparation and application thereof |
| JP5636144B2 (en) * | 2012-01-18 | 2014-12-03 | 株式会社ノリタケカンパニーリミテド | Vitrified super abrasive wheel |
| CN104097154A (en) * | 2014-07-05 | 2014-10-15 | 郑州磨料磨具磨削研究所有限公司 | Manufacturing method of abrasive blocks for superhard material grinding disc and manufacturing method of superhard material grinding disc |
| WO2018081044A1 (en) * | 2016-10-25 | 2018-05-03 | 3M Innovative Properties Company | Magnetizable abrasive particle and method of making the same |
| CN112138835B (en) * | 2020-09-02 | 2023-09-26 | 郑州中南杰特超硬材料有限公司 | Shaping method of cubic boron nitride and application thereof |
| CN111993299A (en) * | 2020-09-17 | 2020-11-27 | 郑州市宇弘磨料磨具有限公司 | Preparation method of low-foam abrasive grinding tool |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5611326A (en) * | 1994-06-29 | 1997-03-18 | S.E.A. Utensili Diamantati S.P.A. | Diamond-set insert carrier tool for automatic and manual machines of dressing, smoothing and polishing type for the stone, ceramic and tile industries |
| CN2846022Y (en) * | 2005-11-08 | 2006-12-13 | 上海达特精密机械配件有限公司 | Split CBN grinding apparatus |
-
2007
- 2007-06-18 CN CN2007100421284A patent/CN101069961B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5611326A (en) * | 1994-06-29 | 1997-03-18 | S.E.A. Utensili Diamantati S.P.A. | Diamond-set insert carrier tool for automatic and manual machines of dressing, smoothing and polishing type for the stone, ceramic and tile industries |
| CN2846022Y (en) * | 2005-11-08 | 2006-12-13 | 上海达特精密机械配件有限公司 | Split CBN grinding apparatus |
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