CN105906332A - Processing technology of ceramic shaft for shield pump - Google Patents
Processing technology of ceramic shaft for shield pump Download PDFInfo
- Publication number
- CN105906332A CN105906332A CN201610542894.6A CN201610542894A CN105906332A CN 105906332 A CN105906332 A CN 105906332A CN 201610542894 A CN201610542894 A CN 201610542894A CN 105906332 A CN105906332 A CN 105906332A
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- Prior art keywords
- ceramic shaft
- ceramic
- pressure
- powder
- motor pump
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Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/0003—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof containing continuous channels, e.g. of the "dead-end" type or obtained by pushing bars in the green ceramic product
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/043—Shafts
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a processing technology of a ceramic shaft for a shield pump. According to the processing technology, in the step of (1), high-precision aluminium oxide magnetic powder No. 99 is used as ceramic granulation powder, and the ceramic granulation powder is high in accuracy, so that the high-precision ceramic shaft is manufactured; in the step (2), pressure powder spraying is adopted in powder injection, and the pressure is 55KPa; due to the powder injection way, the powder is more evenly injected, and the problem that the granulation powder is unevenly hardened is prevented; in the step (3), the pressure condition of pressing is 115MPa, and the pressure is more beneficial to the formation of a coarse blank of the ceramic shaft; in the step (5), by means of a targeted sintering temperature program, the ceramic shaft fired in the temperature program is high in strength and good in resistance; in the step (9), the processing way of a channel of a bearing ring is super precision finishing, so that the process can reduce the roughness of the channel and improve the roundness of the channel.
Description
Technical field
The present invention relates to canned motor pump manufacture field, particularly relate to the processing technique of a kind of canned motor pump ceramic shaft.
Background technology
Applying the ceramic shaft in canned motor pump is wherein important core parts, plays the effect supporting the canned motor pump life-span, has the effect of anticorrosive compressive.All the time, producing this type of ceramic shaft when, there is many disadvantages, such as:
CN201310036839.6: the present invention relates to a kind of canned motor pump ceramic shaft, it is characterized in that: include ceramic shaft body, this ceramic shaft body profile is in cylindrical always, the a length of 80mm of this ceramic shaft body, a diameter of 12mm, a deep hole is inwardly offered from one end of ceramic shaft body, a diameter of 5mm of this deep hole, the degree of depth is 75mm, the other end at described ceramic shaft body offers flat recess, the degree of depth of described flat recess is 1mm, width is 1mm, described ceramic shaft body also offers a discharge orifice, a diameter of 1.5mm of discharge orifice, this discharge orifice connects with deep hole, the positional distance flat recess end face of described discharge orifice is 12mm.The method using dry bag formula hydrostatic profile technique when producing this canned motor pump ceramic shaft, replace original hot die-casting molding technique, save allowance, and improve this ceramic shaft density, surface roughness and anti-pressure ability, and solve concentricity issues in processing and the problem that causes centre deviation..
CN201110158863.8: the present invention relates to a kind of ceramic ball bearing, particularly relates to a kind of high technology ceramics bearing and processing technique thereof, and it belongs to bearing and manufacture field thereof.High technology ceramics bearing of the present invention and processing technique thereof, rolling element uses silicon nitride ceramic material, and its density reduces, and centrifugal force reduces more than 40%, and limit speed improves more than 30% so that the service life of bearing improves more than 50%.Silicon nitride ceramic material has the advantages such as coefficient of friction is little, self-lubricating capacities is strong, wear-resisting, high temperature resistant simultaneously.
Above method is all to improve in ceramic shaft one or several performances, the performance requirement that ceramic shaft uses cannot be met, and the present invention has accomplished the complete upgrading to ceramic shaft performance, reforms its technique simultaneously, accelerate the processing of ceramic shaft, improve machining accuracy.
Summary of the invention
A kind of processing technique of canned motor pump ceramic shaft, its step includes:
(1) choose ceramic prilling powder, pelletizing is sieved, it is ensured that the diameter of pelletizing is between 0.2-0.5um；
(2) selecting dry bag formula isostatic pressing machine, be infused in forming cavity by ceramic prilling powder, a diameter of 16mm of forming cavity, the degree of depth is 95mm, and bottom is with the specification of flat recess；
(3), in plug is inserted into forming cavity again, ceramic prilling powder is suppressed, the condition of compacting be pressure be 110-120MPa, the static pressure time is the 50-65 second；
(4) take out the thick embryo of ceramic shaft with deep hole, utilize the drill bit of a diameter of 1.5-1.8mm to get discharge orifice；
(5) the semi-finished product ceramic shaft through Drilling operation is put in sintering furnace it is sintered；；
(6) from sintering furnace, take out the ceramic shaft body of molding, use numerically controlled lathe to be processed into ring-type by ceramic shaft body；
(7) then ceramic shaft body carrying out heat treatment and subzero treatment, heat-treatment quenching hardness HRC65-70, cryogenic temperature controls at subzero 55 DEG C-subzero 70 DEG C；
(8) ceramic shaft lasso is carried out cold rolling；
(9) plane of ceramic shaft body lasso, external diameter, endoporus, raceway groove are carried out mill processing, reach the dimensional accuracy of part.
Preferably, the ceramic prilling powder that step (1) uses is high-accuracy No. 99 aluminium oxide magnetic.
Preferably, in step (2), note powder uses pressure to dust, and pressure is 55Kpa.
Preferably, the pressure condition that step (3) is suppressed is 115Mpa.
Preferably, the heating schedule that step (5) sinters is: the first step, and the preheating temperature of sintering furnace is 50 DEG C, semi-finished product ceramic shaft is placed in stove, with 10 hours, heats up 100 DEG C per hour and is at the uniform velocity increased to 1050 DEG C；Second step, in 2 hours, the temperature in sintering furnace is quickly at the uniform velocity increased to 1450 DEG C, and be incubated 4 hours by 1050 DEG C；4th step, natural cooling stove warms to room temperature.
Preferably, step (9) is fine abrasive to the processing mode of the raceway groove of bearing ring.
Beneficial effect: the invention provides the processing technique of a kind of canned motor pump ceramic shaft, the ceramic prilling powder that step (1) uses is high-accuracy No. 99 aluminium oxide magnetic, this kind of ceramic prilling powder precision is high, high-precision ceramic shaft can be produced, in step (2), note powder uses pressure to dust, pressure is 55Kpa, this kind of note powder mode makes to note powder and is more uniformly distributed, prevent pelletizing from hardening irregular problem, the pressure condition that step (3) is suppressed is 115Mpa, this pressure is more conducive to the formation of the thick embryo of ceramic shaft, the heating schedule that step (5) sinters is: the first step, the preheating temperature of sintering furnace is 50 DEG C, semi-finished product ceramic shaft is placed in stove, with 10 hours, heat up 100 DEG C per hour and be at the uniform velocity increased to 1050 DEG C；Second step, in 2 hours, the temperature in sintering furnace is quickly at the uniform velocity increased to 1450 DEG C, and be incubated 4 hours by 1050 DEG C；4th step, natural cooling stove warms to room temperature, high in the ceramic shaft intensity fired in this temperature program(me), better resistance, and step (9) is fine abrasive to the processing mode of the raceway groove of bearing ring, and this operation can reduce the roughness of raceway groove and improve the circularity of raceway groove.
Detailed description of the invention
For the technological means making the present invention realize, creation characteristic, reach purpose and be easy to understand with effect, below in conjunction with detailed description of the invention, the present invention is expanded on further.
Embodiment
1
:
A kind of processing technique of canned motor pump ceramic shaft, its step includes:
(1) choose high-accuracy No. 99 aluminium oxide magnetic pelletizing, pelletizing is sieved, it is ensured that the diameter of pelletizing is between 0.2um；
(2) selecting dry bag formula isostatic pressing machine, use pressure to dust, pressure is 55Kpa, is infused in forming cavity by ceramic prilling powder, a diameter of 16mm of forming cavity, and the degree of depth is 95mm, and bottom is with the specification of flat recess；
(3), in plug is inserted into forming cavity again, ceramic prilling powder is suppressed, the condition of compacting be pressure be 115MPa, the static pressure time is 50 seconds；
(4) take out the thick embryo of ceramic shaft with deep hole, utilize the drill bit of a diameter of 1.5mm to get discharge orifice；
(5) the semi-finished product ceramic shaft through Drilling operation is put in sintering furnace it is sintered, the heating schedule of sintering is: the first step, and the preheating temperature of sintering furnace is 50 DEG C, semi-finished product ceramic shaft is placed in stove, with 10 hours, heat up 100 DEG C per hour and be at the uniform velocity increased to 1050 DEG C；Second step, in 2 hours, the temperature in sintering furnace is quickly at the uniform velocity increased to 1450 DEG C, and be incubated 4 hours by 1050 DEG C；4th step, natural cooling stove warms to room temperature；
(6) from sintering furnace, take out the ceramic shaft body of molding, use numerically controlled lathe to be processed into ring-type by ceramic shaft body；
(7) then ceramic shaft body carrying out heat treatment and subzero treatment, heat-treatment quenching hardness HRC65, cryogenic temperature controls at subzero 55 DEG C；
(8) ceramic shaft lasso is carried out cold rolling；
(9) plane of ceramic shaft body lasso, external diameter, endoporus, raceway groove being carried out mill processing, the processing mode to the raceway groove of bearing ring is fine abrasive, reaches the dimensional accuracy of part；
Embodiment
2
:
A kind of processing technique of canned motor pump ceramic shaft, its step includes:
(1) choose high-accuracy No. 99 aluminium oxide magnetic pelletizing, pelletizing is sieved, it is ensured that the diameter of pelletizing is between 0.4um；
(2) selecting dry bag formula isostatic pressing machine, use pressure to dust, pressure is 55Kpa, is infused in forming cavity by ceramic prilling powder, a diameter of 16mm of forming cavity, and the degree of depth is 95mm, and bottom is with the specification of flat recess；
(3), in plug is inserted into forming cavity again, ceramic prilling powder is suppressed, the condition of compacting be pressure be 115MPa, the static pressure time is 60 seconds；
(4) take out the thick embryo of ceramic shaft with deep hole, utilize the drill bit of a diameter of 1.6mm to get discharge orifice；
(5) the semi-finished product ceramic shaft through Drilling operation is put in sintering furnace it is sintered, the heating schedule of sintering is: the first step, and the preheating temperature of sintering furnace is 50 DEG C, semi-finished product ceramic shaft is placed in stove, with 10 hours, heat up 100 DEG C per hour and be at the uniform velocity increased to 1050 DEG C；Second step, in 2 hours, the temperature in sintering furnace is quickly at the uniform velocity increased to 1450 DEG C, and be incubated 4 hours by 1050 DEG C；4th step, natural cooling stove warms to room temperature；
(6) from sintering furnace, take out the ceramic shaft body of molding, use numerically controlled lathe to be processed into ring-type by ceramic shaft body；
(7) then ceramic shaft body carrying out heat treatment and subzero treatment, heat-treatment quenching hardness HRC68, cryogenic temperature controls at subzero 65 DEG C；
(8) ceramic shaft lasso is carried out cold rolling；
(9) plane of ceramic shaft body lasso, external diameter, endoporus, raceway groove being carried out mill processing, the processing mode to the raceway groove of bearing ring is fine abrasive, reaches the dimensional accuracy of part；
Embodiment
3
:
A kind of processing technique of canned motor pump ceramic shaft, its step includes:
(1) choose high-accuracy No. 99 aluminium oxide magnetic pelletizing, pelletizing is sieved, it is ensured that the diameter of pelletizing is between 0.5um；
(2) selecting dry bag formula isostatic pressing machine, use pressure to dust, pressure is 55Kpa, is infused in forming cavity by ceramic prilling powder, a diameter of 16mm of forming cavity, and the degree of depth is 95mm, and bottom is with the specification of flat recess；
(3), in plug is inserted into forming cavity again, ceramic prilling powder is suppressed, the condition of compacting be pressure be 115MPa, the static pressure time is 65 seconds；
(4) take out the thick embryo of ceramic shaft with deep hole, utilize the drill bit of a diameter of 1.8mm to get discharge orifice；
(5) the semi-finished product ceramic shaft through Drilling operation is put in sintering furnace it is sintered, the heating schedule of sintering is: the first step, and the preheating temperature of sintering furnace is 50 DEG C, semi-finished product ceramic shaft is placed in stove, with 10 hours, heat up 100 DEG C per hour and be at the uniform velocity increased to 1050 DEG C；Second step, in 2 hours, the temperature in sintering furnace is quickly at the uniform velocity increased to 1450 DEG C, and be incubated 4 hours by 1050 DEG C；4th step, natural cooling stove warms to room temperature；
(6) from sintering furnace, take out the ceramic shaft body of molding, use numerically controlled lathe to be processed into ring-type by ceramic shaft body；
(7) then ceramic shaft body carrying out heat treatment and subzero treatment, heat-treatment quenching hardness HRC70, cryogenic temperature controls at subzero 70 DEG C；
(8) ceramic shaft lasso is carried out cold rolling；
(9) plane of ceramic shaft body lasso, external diameter, endoporus, raceway groove being carried out mill processing, the processing mode to the raceway groove of bearing ring is fine abrasive, reaches the dimensional accuracy of part；
Extract the sample of each embodiment to carry out detection and analyze, and compare with prior art, draw following data:
Can draw according to above table data, when implementing embodiment 2 parameter, the ceramic shaft obtained, its impact strength is 895Mpa, and case hardness is 50kgf, and toughness is 2780KJ/m3, the accuracy of manufacture is 0.5 grade, and its impact strength of prior art standard is 795Mpa, and case hardness is 30kgf, and toughness is 2050KJ/m3, the accuracy of manufacture is 1.0 grades, and the ceramic shaft impact strength that the processing technique of canned motor pump ceramic shaft the most of the present invention produces is higher, shows that hardness is bigger, and toughness is more preferable, and the accuracy of manufacture is higher, and in contrast the present invention has superiority significantly.
The invention provides the processing technique of a kind of canned motor pump ceramic shaft, the ceramic prilling powder that step (1) uses is high-accuracy No. 99 aluminium oxide magnetic, this kind of ceramic prilling powder precision is high, high-precision ceramic shaft can be produced, in step (2), note powder uses pressure to dust, pressure is 55Kpa, this kind of note powder mode makes to note powder and is more uniformly distributed, prevent pelletizing from hardening irregular problem, the pressure condition that step (3) is suppressed is 115Mpa, this pressure is more conducive to the formation of the thick embryo of ceramic shaft, the heating schedule that step (5) sinters is: the first step, the preheating temperature of sintering furnace is 50 DEG C, semi-finished product ceramic shaft is placed in stove, with 10 hours, heat up 100 DEG C per hour and be at the uniform velocity increased to 1050 DEG C；Second step, in 2 hours, the temperature in sintering furnace is quickly at the uniform velocity increased to 1450 DEG C, and be incubated 4 hours by 1050 DEG C；4th step, natural cooling stove warms to room temperature, high in the ceramic shaft intensity fired in this temperature program(me), better resistance, and step (9) is fine abrasive to the processing mode of the raceway groove of bearing ring, and this operation can reduce the roughness of raceway groove and improve the circularity of raceway groove.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every equivalent structure utilizing description of the invention content to be made or equivalence flow process conversion; or directly or indirectly it is used in other relevant technical fields, the most in like manner it is included in the scope of patent protection of the present invention.
Claims (6)
1. the processing technique of a canned motor pump ceramic shaft, it is characterised in that its step includes:
(1) choose ceramic prilling powder, pelletizing is sieved, it is ensured that the diameter of pelletizing is between 0.2-0.5um；
(2) selecting dry bag formula isostatic pressing machine, be infused in forming cavity by ceramic prilling powder, a diameter of 16mm of forming cavity, the degree of depth is 95mm, and bottom is with the specification of flat recess；
(3), in plug is inserted into forming cavity again, ceramic prilling powder is suppressed, the condition of compacting be pressure be 110-120MPa, the static pressure time is the 50-65 second；
(4) take out the thick embryo of ceramic shaft with deep hole, utilize the drill bit of a diameter of 1.5-1.8mm to get discharge orifice；
(5) the semi-finished product ceramic shaft through Drilling operation is put in sintering furnace it is sintered；；
(6) from sintering furnace, take out the ceramic shaft body of molding, use numerically controlled lathe to be processed into ring-type by ceramic shaft body；
(7) then ceramic shaft body carrying out heat treatment and subzero treatment, heat-treatment quenching hardness HRC65-70, cryogenic temperature controls at subzero 55 DEG C-subzero 70 DEG C；
(8) ceramic shaft lasso is carried out cold rolling；
(9) plane of ceramic shaft body lasso, external diameter, endoporus, raceway groove are carried out mill processing, reach the dimensional accuracy of part.
2. the processing technique of the canned motor pump ceramic shaft described in a claim 1, it is characterised in that the ceramic prilling powder that step (1) uses is high-accuracy No. 99 aluminium oxide magnetic.
3. the processing technique of the canned motor pump ceramic shaft described in a claim 1, it is characterised in that in step (2), note powder uses pressure to dust, and pressure is 55Kpa.
4. the processing technique of the canned motor pump ceramic shaft described in a claim 1, it is characterised in that the pressure condition that step (3) is suppressed is 115Mpa.
5. the processing technique of the canned motor pump ceramic shaft described in a claim 1, it is characterised in that the heating schedule that step (5) sinters is: the first step, the preheating temperature of sintering furnace is 50 DEG C, semi-finished product ceramic shaft is placed in stove, with 10 hours, heats up 100 DEG C per hour and be at the uniform velocity increased to 1050 DEG C；Second step, in 2 hours, the temperature in sintering furnace is quickly at the uniform velocity increased to 1450 DEG C, and be incubated 4 hours by 1050 DEG C；4th step, natural cooling stove warms to room temperature.
6. the processing technique of the canned motor pump ceramic shaft described in a claim 1, it is characterised in that step (9) is fine abrasive to the processing mode of the raceway groove of bearing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610542894.6A CN105906332A (en) | 2016-07-12 | 2016-07-12 | Processing technology of ceramic shaft for shield pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610542894.6A CN105906332A (en) | 2016-07-12 | 2016-07-12 | Processing technology of ceramic shaft for shield pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105906332A true CN105906332A (en) | 2016-08-31 |
Family
ID=56754254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610542894.6A Withdrawn CN105906332A (en) | 2016-07-12 | 2016-07-12 | Processing technology of ceramic shaft for shield pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105906332A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55161902A (en) * | 1979-06-01 | 1980-12-16 | Nissan Motor Co Ltd | Ceramic turbine rotor |
| CN102635635A (en) * | 2011-06-14 | 2012-08-15 | 李东炬 | Precise ceramic bearing and machining process thereof |
| CN103089690A (en) * | 2013-01-31 | 2013-05-08 | 苏州晶瓷超硬材料有限公司 | Ceramic shaft for shield pump and production technology thereof |
-
2016
- 2016-07-12 CN CN201610542894.6A patent/CN105906332A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55161902A (en) * | 1979-06-01 | 1980-12-16 | Nissan Motor Co Ltd | Ceramic turbine rotor |
| CN102635635A (en) * | 2011-06-14 | 2012-08-15 | 李东炬 | Precise ceramic bearing and machining process thereof |
| CN103089690A (en) * | 2013-01-31 | 2013-05-08 | 苏州晶瓷超硬材料有限公司 | Ceramic shaft for shield pump and production technology thereof |
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Application publication date: 20160831 |
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