CN101306555B - Low-stress honeycomb ceramic heat accumulator forming mold and method for preparing same - Google Patents
Low-stress honeycomb ceramic heat accumulator forming mold and method for preparing same Download PDFInfo
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- CN101306555B CN101306555B CN2008100481114A CN200810048111A CN101306555B CN 101306555 B CN101306555 B CN 101306555B CN 2008100481114 A CN2008100481114 A CN 2008100481114A CN 200810048111 A CN200810048111 A CN 200810048111A CN 101306555 B CN101306555 B CN 101306555B
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Abstract
The invention provides a low stress honeycomb ceramics heat-retaining mass forming mould and a preparation method thereof, and aims at the problems of uneven pug flowage, big internal stress in processing and heat stress concentration of cellular included angle in the process of extruding and forming conventional honeycomb ceramics heat-retaining mass. The forming mould comprises a plurality of hole forming columns and a side mould with a cavity. The ends of all the hole forming columns are distributed in the cavity of the side mould, and the relative positions thereof are fixed so as to define a pug outlet hole of the mould; and the cross section of the hole forming column in the position of the pug out hole is a square uniform section with filleted corner transition. The forming mould of the invention solves the problem of stress concentration of 90 DEG included angle of square hole walls, improves the compactness and anti-breakage capacity of the honeycomb ceramics heat-retaining mass, and improves the compactness of the honeycomb ceramics heat-retaining mass and extrusion yield. The forming mould has the advantages of reasonable structure, simple processing method, easy operation, favorable popularization and application, and meets the extruding and the forming requirements of low stress honeycomb ceramics heat-retaining mass.
Description
Technical field
The present invention relates to a kind of mould for preparing honeycomb ceramic heat accumulator and preparation method thereof.
Background technology
Regenerative combustion technology is the novel combustion technology of energy-conserving and environment-protective that is widely used at present on the industry industrial furnaces such as Ferrous Metallurgy, machinery, petrochemical industry, building materials, nonferrous metallurgy.Ceramic heat storage body is that heat-storage type burner is finished the intermediate carrier that flue gas waste heat recovery utilizes, by heat storage periodically accumulation of heat and heat release, heat transferred normal temperature combustion air or coal gas with high-temperature flue gas, realize the recovery of fume afterheat and the high temperature preheating of combustion air or coal gas, reach the purpose of high-efficient energy-saving environment friendly.This shows that heat storage is the critical component in the heat-storage type burner.Domestic and international widely used heat storage mainly contains ceramic heat-storing sphere and honeycomb ceramic heat accumulator at present, and wherein honeycomb ceramic heat accumulator mainly contains square and two kinds of checkerwork cell structures of regular hexagon.In actual applications, because interstitial channels is irregular between the Ceramic Balls heat storage, the long-time easily dry slag of back that uses, cause flow resistance big, reduced the organic efficiency of fume afterheat, simultaneously, because heat exchange area per unit volume is little, increased the arrangement space of regenerator, brought difficulty to practical application is installed.For thin-walled checkerwork cell structure honeycomb ceramic heat accumulator, its straight channel structure, reduced flow resistance significantly, the thin-walled feature of heat storage has improved the heat exchange specific area of heat storage effectively, because square structure more helps the raising of heat exchange area per unit volume, thereby, the early stage both at home and abroad heat storage that uses is square checkerwork cell, but 90 ° of angles of passage hole wall have aggravated local stress concentration, be the inhomogeneous processing stress concentration that causes of extrusion modling process pug rheology on the one hand, cause heat storage moulding qualification rate low, be to concentrate on the other hand in the thermal stress that use checkerwork cell angle causes, cause the breakage of heat storage thermal stress, in the service life of having reduced heat storage, had a strong impact on the production efficiency and the practical effect of heat storage.In addition, by the manufacture craft of square checkerwork cell honeycomb ceramic heat accumulator as can be known, heat storage extrusion molding dies structures shape heat storage checkerwork cell version, taking wire cutting method to carry out to avoid the problem of stress concentration at 90 ° of angle positions of hole wall of square checkerwork cell heat storage under the condition of heat storage extrusion molding dies preparation at present.For this reason, concentrate the aspect to consider from the stress that reduces square checkerwork cell, the domestic regular hexagon checkerwork cell structure heat storage that proposed, make the lattice septum angle bring up to 120 ° by 90 ° of square checkerwork cell, thereby, the stress concentration degree of checkerwork cell angle reduced, and actual production with use in reach and improve the purpose that heat storage prepares yield rate and increases the service life, but compare with square checkerwork cell, the heat exchange specific area of regular hexagon checkerwork cell is less relatively, is unfavorable for the improvement of heat storage heat exchange property.This shows, how to bring into play effectively square checkerwork cell accumulation of heat height heat exchange specific area advantage, to overcome the deficiency that position, checkerwork cell right angle stress concentrates be the important research content of improving the honeycomb ceramic heat accumulator serviceability, improving the preparation yield rate, increase the service life.
Summary of the invention
Square checkerwork cell at honeycomb ceramic heat accumulator has the problem that right angle part stress is concentrated, the invention provides a kind of low-stress honeycomb ceramic heat accumulator forming mold and preparation method thereof, the honeycomb ceramic heat accumulator that goes out through this Mould Machining can address the above problem preferably.
Purpose of the present invention is achieved by the following scheme:
A kind of low-stress honeycomb ceramic heat accumulator forming mold comprises several checkerwork cell shaping columns and has the limit mould of a cavity, thereby the termination of all checkerwork cell shaping posts all is distributed in the cavity of limit mould and their relative position is fixed the mudhole that surrounds mould; The cross section of the checkerwork cell shaping column at mudhole place is the square uiform section with round-corner transition.
Realize between a plurality of checkerwork cell shaping columns and between checkerwork cell shaping column and the limit mould the fixing mode of relative position be: Bian Mo and pedestal are fixed, with be evenly equipped with some small through hole on the pedestal of cavity opposite position on the mould of limit, an end of checkerwork cell shaping column is connected with the small through hole tight fit; Be processed with into mud hole at base bottom, advance mud hole and small through hole and be provided with at interval.
Described checkerwork cell shaping column constitutes by three sections, and the mud outlet end and the mud inlet end that are positioned at two ends are the uiform section sections, and in the middle of being positioned at is variable cross-section section with the two ends smooth connection; The cross-sectional area of mud outlet end uiform section section is greater than the cross-sectional area of mud inlet end uiform section section.
The uiform section section that is positioned at the checkerwork cell shaping column of mud inlet end is and identical square sectional or the circular cross-section of small through hole cross sectional shape on the pedestal.
Enter place, mud hole and be provided with horn opening.
The cavity of described limit mould is a square or rectangular, and the cross section angle is the nature chamfering.
Described pedestal is provided with the indent cavity, and the cross section of indent cavity is identical with the cavity cross section of limit mould, and the termination of small through hole is positioned on the indent cavity; After described checkerwork cell shaping column passed small through hole, its termination was parallel with the end face of pedestal; In the indent cavity, carry out built-up welding and realize closely fixing between the pedestal dative hole forming post; The mud hole is entered in processing on the overlaying surface between the checkerwork cell shaping post.
The preparation method of low-stress honeycomb ceramic heat accumulator forming mold, specific as follows:
A. prepare each parts respectively;
Processing checkerwork cell shaping column: with the square-section steel bar is raw material, take the mode of single-piece machining to carry out the processing of checkerwork cell shaping column: the mud outlet end and the mud inlet end that are positioned at two ends are the uiform section sections, in the middle of being positioned at is variable cross-section section with the two ends smooth connection, and the cross-sectional area of mud outlet end uiform section section is greater than the cross-sectional area of mud inlet end uiform section section;
Processing metal pedestal: adopt the mode elder generation processing metal pedestal of bloom material and machining, on the bottom surface, offer the indent cavity, in the indent cavity, offer the through hole that is slightly less than checkerwork cell shaping column mud inlet end cross-sectional area again;
Processing limit mould: adopt the mode of bloom material and machining to carry out the processing of limit mould, on mould bottom surface, limit, offer one with the identical cavity of metal base indent cavity area;
B. each parts is assembled;
After the metal base heating, the checkerwork cell shaping column of mud inlet end is passed through hole on the metal base, parallel to its termination with the end face of pedestal, checkerwork cell shaping column and metal base formation tight fit is connected;
Relative position between fixed edge mould and the metal base;
Insert whole sheet metal between a plurality of checkerwork cell shaping columns and in the mud extraction passage that constitutes between checkerwork cell shaping column and the limit mould and position, sheet thicknesses is more smaller than corresponding mud extraction channel width;
Carry out built-up welding in the indent cavity on metal base again, the preparation overlay cladding, overlay cladding thickness is consistent with the indent cavity depth; Carrying out integrally annealed after the built-up welding handles; After the annealing, remove the sheet metal that inserts, obtain the assembly of annealing;
On the annealing assembly, bore metal base to the mud extraction direction with drill bit, make into mud hole, adopt big drill bit will enter the mud hole in overlaying surface again and expand the flue mud inlet from overlaying surface;
Trim process and the cleaning of slag ash by mould obtain required low-stress honeycomb ceramic heat accumulator extrusion molding dies.
The present invention has following advantage:
1, this patent is by the improvement design of square checkerwork cell shaping column arris round-corner transition face structure, alleviated the problem of stress concentration of 90 ° of angles of heat storage square lattice septum, simultaneously, kept the big advantage of square checkerwork cell honeycomb ceramic heat accumulator heat exchange specific area.
2, this patent is that uiform section section, centre are the three-stage structure designs of variable cross-section section by checkerwork cell shaping column two ends, is convenient to the rheology of mud material forming and laterally extruding, has improved the density and the resisting breakage ability of honeycomb ceramic heat accumulator.
3, the checkerwork cell shaping column of this patent is to be connected with the assembling of pedestal tight fit, built-up welding after the monomer machining, has guaranteed the machining accuracy and the quality of mould, has improved the density and the extrusion yield of honeycomb ceramic heat accumulator.
4, the low-stress honeycomb ceramic heat accumulator forming mold of this patent is rational in infrastructure, has satisfied the requirement of low-stress honeycomb ceramic heat accumulator extrusion modling;
5, each parts of this patent adopt monomer machinery processing mode, are beneficial to the raising of die surface quality, have guaranteed the early strength of assembling simultaneously, and processing method is simple, and operation is beneficial to and applies easily.
Description of drawings
Fig. 1 is a front view of the present invention;
Fig. 2 is the rearview of Fig. 1;
Fig. 3 is the A-A cutaway view of Fig. 1;
Fig. 4 is the structural representation of limit mould 6;
Fig. 5 is the side view of Fig. 4;
Fig. 6 is the structural representation of embodiment 1 described pedestal 3;
Fig. 7 is the described checkerwork cell shaping post 1 of embodiment 1 and pedestal 3 structural representation that is connected;
Fig. 8 is the structural representation of checkerwork cell shaping column 1;
Fig. 9 is the structural representation of embodiment 2 described pedestals 3;
Figure 10 is embodiment 2 described checkerwork cell shaping posts 1 and pedestal 3 syndeton schematic diagrames;
Figure 11 is the side view that mud inlet end has the checkerwork cell shaping column 1 of circular arc chamfering square sectional;
Figure 12 is the side view that mud inlet end has the checkerwork cell shaping column 1 of circular cross-section.
Wherein, checkerwork cell shaping post 1, mud extraction passage 2, pedestal 3, overlaying surface 4 is entered mud hole 5, limit mould 6, cavity 6-1, indent cavity 8, small through hole 9.
The specific embodiment
Elaborate the preferred embodiment of the present invention below in conjunction with accompanying drawing.
Embodiment 1:
Present embodiment provides a kind of structure of low-stress honeycomb ceramic heat accumulator forming mold.Specific as follows: it comprises several checkerwork cell shaping column 1 (see figure 8)s and the limit mould 6 (seeing Fig. 4, Fig. 5) with a cavity 6-1, and the cavity 6-1 of limit mould 6 is a square or rectangular, and the cross section angle is the nature chamfering.The termination of all checkerwork cell shaping posts 1 all is distributed in the cavity 6-1 of limit mould 6 and thereby their relative position is fixed the mud extraction passage 2 that surrounds mould, and with reference to Fig. 1 and Fig. 3, wherein, the middle part is a cross mud extraction passage, and limit portion is a strip mud extraction passage.
Described checkerwork cell shaping column 1 constitutes by three sections, with reference to Fig. 8, Figure 11 and Figure 12, is respectively uiform section section a, variable cross-section section c and uiform section section b, wherein, uiform section section b is a square sectional, and the cross section arris is the round-corner transition face, and being in the cavity 6-1 of limit mould 6 is the mud outlet end of mould; Uiform section section a is circular arc chamfering square sectional or circular cross-section, is in the mud inlet end of mould; The cross-sectional area of mud outlet end is greater than the cross-sectional area of mud inlet end.Variable cross-section section c is the section of seamlessly transitting of uiform section section a and uiform section section b, and progressively carries out the transition to uiform section section b along discharging direction sectional dimension and shape by uiform section section a, and three segment length about equally.
The square cross-sectional configuration of above-mentioned checkerwork cell shaping column 1 mud outlet end has kept the big advantage of square checkerwork cell honeycomb ceramic heat accumulator heat exchange specific area; Improvement design by square checkerwork cell shaping column 1 arris round-corner transition face structure, the stress of having alleviated 90 ° of angles of heat storage square lattice septum is concentrated, improved the yield rate that heat storage is made, delayed the damaged process of heat storage checkerwork cell stress, alleviate the dross degree of checkerwork cell angle, prolonged the service life of heat storage;
The three-stage structure design of checkerwork cell shaping column 1 uiform section section a, variable cross-section section c and uiform section section b, be convenient to the rheology of mud material forming and laterally extruding, reduced the machining stress that checkerwork cell shaping column 1 rough surface causes, improve the density and the extrusion yield of honeycomb ceramic heat accumulator, accumulation of heat and heat release performance have been improved, and for increasing into the mud aisle spare that advances in mud hole 5 provides advantage, be convenient to the stable of heat storage extrusion modling and carry out.
Realize between a plurality of checkerwork cell shaping columns 1 and between checkerwork cell shaping column 1 and the limit mould 6 the fixing mode of relative position be: limit mould 6 is fixing with pedestal 3, the structure of pedestal 3 is with reference to Fig. 6, Fig. 7, with be evenly equipped with plurality of square or circular small through hole 9 on the pedestal 3 of cavity 6-1 opposite position on the limit mould 6, one end of checkerwork cell shaping column 1 is connected with small through hole 9 tight fits, and promptly the termination of checkerwork cell shaping column 1 herein has square sectional or the circular cross-section identical with small through hole 9 shapes.
Simultaneously, also be processed with into mud hole 5 in the bottom of pedestal 3, with reference to Fig. 6 and Fig. 7, the mud hole 5 of advancing herein communicates with mudhole.Enter mud hole 5 and be set to horn opening, can reduce the charging resistance of moulding pug; Entering mud hole 5 is provided with at interval with small through hole 9.
Embodiment 2:
The difference of present embodiment and embodiment 1 only is, is provided with indent cavity 8 on pedestal 3, and with reference to Fig. 9, the cross section of indent cavity 8 is identical with the cavity 6-1 cross section of limit mould 6, and the termination of small through hole 9 is positioned on the indent cavity 8; After described checkerwork cell shaping column 1 passed small through hole 9, its termination was parallel with the end face of pedestal 3; In indent cavity 8, carry out built-up welding, with reference to Figure 10; The mud hole is entered in processing on the overlaying surface 4 between the checkerwork cell shaping post.
The purpose that indent cavity 8 is set is to make checkerwork cell shaping column 1 to be connected more firm with pedestal 3, the specific implementation structure is, built-up welding in the indent cavity 8 of pedestal 3, can promote the bonding strength between checkerwork cell shaping column 1 and the pedestal 3, by the thickness of control pedestal 3 and the degree of depth of indent cavity 8, can prevent the built-up welding distortion, thereby guarantee the machining accuracy of mould.
The preparation method of above-mentioned mould is as follows:
All parts all adopt mould steel to make.
With the square-section steel bar is raw material, takes the mode of single-piece machining to carry out the processing of checkerwork cell shaping column 1.
Adopt the metal base 3 of the mode elder generation processing column body of bloom material and machining, carry out the processing of indent cavity 8 and circular arc chamfering square or manhole 9 again, wherein, the size of through hole 9 is than the little 0.01mm of checkerwork cell shaping column 1 uiform section section a.
After metal base 3 heating, checkerwork cell shaping column 1 uiform section section a is passed circular arc chamfering square or manhole 9 on the metal base 3, carry out the tight fit assembling of checkerwork cell shaping column 1 and metal base 3, make matable assembly.
Take the mode of machining to carry out the processing of limit mould 6.
Limit mould and metal base are fixed by screw, also can the two be fixed by clip, perhaps the two are welded, or carry out bondingly all can with glue.
Insert sheet metal and position in mud extraction passage 2, sheet thicknesses is than the little 0.01mm of corresponding mud extraction passage 2 width.Carry out built-up welding in the indent cavity 8 on metal base 3 again, preparation overlay cladding 4, built-up welding thickness is consistent with indent cavity 8 degree of depth; Carrying out integrally annealed after the built-up welding under protective atmosphere handles.After the annealing, remove the sheet metal that inserts, obtain the assembly of annealing.Annealing in process after the built-up welding under the protective atmosphere has been eliminated welding processing stress, has made things convenient for the further processing of mould.The present invention adopts mould steel to make various members, has improved the wear resistance of mould, has prolonged the service life of mould.
Adopt the drill bit of suitable diameter on the annealing assembly, to bore metal base 3 to the mud extraction direction, make circle and enter mud hole 5, adopt big drill bit that circle is entered mud hole 5 in overlaying surface again and expand the flue mud inlet from overlaying surface.
Trim process and the cleaning of slag ash by mould obtain required low-stress honeycomb ceramic heat accumulator extrusion molding dies.
Among the aforementioned preparation method, checkerwork cell shaping column 1 monomer machinery processing mode is convenient to arris round-corner transition face and the processing of multi-segment structure checkerwork cell shaping column 1 and the raising of surface quality; Under metal base 3 heating conditions, checkerwork cell shaping column 1 is inserted on the metal base 3 in circular arc chamfering square or the manhole 9, guaranteed early strength and rigidity that the state that closely cooperates between circular arc chamfering square on checkerwork cell shaping column 1 and the metal base 3 or the manhole 9 and checkerwork cell shaping column 1 are assembled.
Embodiment 3:
Present embodiment provides a kind of low-stress honeycomb ceramic heat accumulator forming mold that comprises concrete processing dimension, with reference to Fig. 1, Fig. 2 and Fig. 3, mainly by checkerwork cell shaping column 1, mud extraction passage 2, metal base 3, overlay cladding 4, advance mud passage 5, limit mould 6 is formed.Middle part mud extraction passage 2 width are 1mm, and limit minister's bar shaped mud extraction passage 2 width are 1.2mm.Checkerwork cell shaping column 1 constitutes by three sections, is respectively uiform section section a, variable cross-section section and uiform section section b, and wherein, uiform section section b is a square sectional, and the cross section arris is the round-corner transition face, length of side 4mm, and chamfer radius is 1.5mm, is in the mud outlet end of mould; Uiform section section a is a circular cross-section, and diameter is 3mm, is in the mud inlet end of mould; The variable cross-section section is the changeover portion of uiform section section a and uiform section section b, is progressively carried out the transition to sectional dimension and the shape of uiform section section b by uiform section section a along discharging direction sectional dimension and shape.Entering the mud hole is manhole, and mud inlet end is tubaeform mud inlet.Faces such as limit mould 6 interior skies are square, and square angle is the nature chamfering.The thickness of overlay cladding 4 is consistent with indent cavity 8 degree of depth of metal base 3, is 5mm.Indent cavity 8 bottom surfaces are processed with manhole 9, and diameter is 3
+ 0 -0.01Mm.Low-stress honeycomb ceramic heat accumulator forming mold all adopts mould steel to make.Concrete preparation method is that mold component all adopts mould steel to make.With the square-section steel bar is raw material, takes the mode of single-piece machining to carry out 1 processing of checkerwork cell shaping column.Adopt the mode elder generation processing metal pedestal 3 of bloom material and machining mode, carry out the processing of indent cavity 8 and circular arc chamfering square or manhole 9 again.After metal base 3 heating, checkerwork cell shaping column 1 uiform section section a is passed manhole 9 on the metal base 3, carry out the tight fit assembling of checkerwork cell shaping column 1 and metal base 3, make the tight fit assembly.Take the mode of machining to carry out the processing of limit mould 6.Assembling limit mould 6 and tight fit assembly insert sheet metal and position in mud extraction passage 2, sheet thicknesses is than the little 0.01mm of corresponding mud extraction passage 2 width.Carry out built-up welding in the indent cavity 8 on metal base 3 again, preparation overlay cladding 4, built-up welding thickness is consistent with indent cavity 8 degree of depth; Carrying out integrally annealed after the built-up welding under protective atmosphere handles.After the annealing, remove the sheet metal that inserts, obtain the assembly of annealing.Adopt the drill bit of suitable diameter on the annealing assembly, to bore metal base 3 to the mud extraction direction, make circle and enter the mud hole, adopt big drill bit that circle is entered the mud hole in overlaying surface again and expand the flue mud inlet from overlaying surface.Carry out the fine setting and the cleaning of slag ash of mould at last, obtain required low-stress honeycomb ceramic heat accumulator extrusion molding dies.
Embodiment 4:
Present embodiment provides the low-stress honeycomb ceramic heat accumulator forming mold of another kind of size, and middle part mud extraction passage 2 width are 1.2mm, and limit minister's bar shaped mud extraction passage 2 width are 1.3mm.Checkerwork cell shaping column 1 constitutes by three sections, is respectively uiform section section a, variable cross-section section and uiform section section b, and wherein, uiform section section b is a square sectional, and the cross section arris is the round-corner transition face, length of side 3mm, and chamfer radius is 1mm, is in the mud outlet end of mould; Uiform section section a is the circular arc chamfering square sectional, and diameter is 2.5mm, and natural chamfering is in the mud inlet end of mould; The variable cross-section section is the changeover portion of uiform section section a and uiform section section b, is progressively carried out the transition to sectional dimension and the shape of uiform section section b by uiform section section a along discharging direction sectional dimension and shape.Entering the mud hole is manhole, and mud inlet end is tubaeform mud inlet.Faces such as limit mould 6 interior skies are square, and the cross section angle is the nature chamfering.The thickness of overlay cladding 4 is consistent with indent cavity 8 degree of depth of metal base 3, is 4mm.Indent cavity 8 bottom surfaces are processed with circular arc chamfering square 9, and diameter is 2.5
+ 0 -0.01Mm.Low-stress honeycomb ceramic heat accumulator forming mold all adopts mould steel to make.
Claims (10)
1. low-stress honeycomb ceramic heat accumulator forming mold, it is characterized in that: comprise several checkerwork cell shaping columns and have the limit mould of a cavity, thereby the termination of all checkerwork cell shaping posts all is distributed in the cavity of limit mould and their relative position is fixed the mudhole that surrounds mould; The cross section of the checkerwork cell shaping column at mudhole place is the square uiform section with round-corner transition.
2. low-stress honeycomb ceramic heat accumulator forming mold according to claim 1, it is characterized in that realizing between a plurality of checkerwork cell shaping columns and between checkerwork cell shaping column and the limit mould the fixing mode of relative position be: Bian Mo and pedestal are fixed, with be evenly equipped with some small through hole on the pedestal of cavity opposite position on the mould of limit, an end of checkerwork cell shaping column is connected with the small through hole tight fit;
Be processed with into mud hole at base bottom, advance mud hole and small through hole and be provided with at interval.
3. low-stress honeycomb ceramic heat accumulator forming mold according to claim 2 is characterized in that described checkerwork cell shaping column constitutes by three sections, and the mud outlet end and the mud inlet end that are positioned at two ends are the uiform section sections, and in the middle of being positioned at is variable cross-section section with the two ends smooth connection; The cross-sectional area of mud outlet end uiform section section is greater than the cross-sectional area of mud inlet end uiform section section.
4. low-stress honeycomb ceramic heat accumulator forming mold according to claim 3, the uiform section section that it is characterized in that being positioned at the checkerwork cell shaping column of mud inlet end are and identical square sectional or the circular cross-section of small through hole cross sectional shape on the pedestal.
5. low-stress honeycomb ceramic heat accumulator forming mold according to claim 2 is characterized in that into place, mud hole is provided with horn opening.
6. low-stress honeycomb ceramic heat accumulator forming mold according to claim 1, the cavity that it is characterized in that described limit mould is a square or rectangular, the cross section angle is the nature chamfering.
7. according to any described low-stress honeycomb ceramic heat accumulator forming mold of claim 2-6, it is characterized in that described pedestal is provided with the indent cavity, the cross section of indent cavity is identical with the cavity cross section of limit mould, and the termination of small through hole is positioned on the indent cavity; After described checkerwork cell shaping column passed small through hole, its termination was parallel with the end face of pedestal; In the indent cavity, carry out built-up welding and realize closely fixing between the pedestal dative hole forming post; The mud hole is entered in processing on the overlaying surface between the checkerwork cell shaping post.
8. the preparation method of a low-stress honeycomb ceramic heat accumulator forming mold is characterized in that:
A. prepare each parts respectively;
Processing checkerwork cell shaping column: with the square-section steel bar is raw material, take the mode of single-piece machining to carry out the processing of checkerwork cell shaping column: the mud outlet end and the mud inlet end that are positioned at two ends are the uiform section sections, in the middle of being positioned at is variable cross-section section with the two ends smooth connection, and the cross-sectional area of mud outlet end uiform section section is greater than the cross-sectional area of mud inlet end uiform section section;
Processing metal pedestal: adopt the mode elder generation processing metal pedestal of bloom material and machining, on the bottom surface, offer the indent cavity, in the indent cavity, offer the through hole that is slightly less than checkerwork cell shaping column mud inlet end cross-sectional area again;
Processing limit mould: adopt the mode of bloom material and machining to carry out the processing of limit mould, on mould bottom surface, limit, offer one with the identical cavity of metal base indent cavity area;
B. each parts is assembled;
After the metal base heating, the checkerwork cell shaping column of mud inlet end is passed through hole on the metal base, parallel to its termination with the end face of pedestal, checkerwork cell shaping column and metal base formation tight fit is connected;
The relative position of fixed edge mould and metal base;
Insert whole sheet metal between a plurality of checkerwork cell shaping columns and in the mud extraction passage that constitutes between checkerwork cell shaping column and the limit mould and position, sheet thicknesses is more smaller than corresponding mud extraction channel width;
Carry out built-up welding in the indent cavity on metal base again, the preparation overlay cladding, overlay cladding thickness is consistent with the indent cavity depth; Carrying out integrally annealed after the built-up welding handles; After the annealing, remove the sheet metal that inserts, obtain the assembly of annealing;
On the annealing assembly, bore metal base to the mud extraction direction with drill bit, make into mud hole, adopt big drill bit will enter the mud hole in overlaying surface again and expand the flue mud inlet from overlaying surface;
Trim process and the cleaning of slag ash by mould obtain required low-stress honeycomb ceramic heat accumulator extrusion molding dies.
9. the preparation method of low-stress honeycomb ceramic heat accumulator forming mold according to claim 8, it is characterized in that: the clear size of opening on the metal base is than the little 0.01mm of checkerwork cell shaping column mud inlet end cross-sectional area; The sheet thicknesses of inserting in the mud extraction passage is than the little 0.01mm of corresponding mud extraction channel width.
10. it is characterized in that according to Claim 8 or the preparation method of 9 described low-stress honeycomb ceramic heat accumulator forming molds: all parts all adopt mould steel to make.
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| CN102862037A (en) * | 2012-09-17 | 2013-01-09 | 李少荣 | Preparation method of ultralarge high-pore-density honeycomb ceramic mold |
| CN104609862A (en) * | 2014-12-12 | 2015-05-13 | 中国科学院福建物质结构研究所 | Hot-pressing mould and method for preparation of porous structural ceramic |
| CN108858684A (en) * | 2018-08-03 | 2018-11-23 | 江苏光天耐材科技有限公司 | A kind of pressurizing unit being used to prepare ceramic filter |
| CN110253721A (en) * | 2019-07-03 | 2019-09-20 | 南京柯瑞特种陶瓷股份有限公司 | A kind of processing method of unsymmetric structure ceramic honey comb, mold and mold |
| CN115609997A (en) * | 2022-11-14 | 2023-01-17 | 广东韩研活性炭科技股份有限公司 | Modified honeycomb carbon forming method |
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