CN115122047A - Manufacturing method of vacuum heat-insulation container with inner titanium and outer stainless steel - Google Patents
Manufacturing method of vacuum heat-insulation container with inner titanium and outer stainless steel Download PDFInfo
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- CN115122047A CN115122047A CN202210681329.3A CN202210681329A CN115122047A CN 115122047 A CN115122047 A CN 115122047A CN 202210681329 A CN202210681329 A CN 202210681329A CN 115122047 A CN115122047 A CN 115122047A
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- stainless steel
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- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 224
- 239000010935 stainless steel Substances 0.000 title claims abstract description 224
- 239000010936 titanium Substances 0.000 title claims abstract description 177
- 229910052719 titanium Inorganic materials 0.000 title claims abstract description 177
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims abstract description 165
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 54
- 238000009413 insulation Methods 0.000 title abstract description 24
- 238000003466 welding Methods 0.000 claims abstract description 56
- 238000010438 heat treatment Methods 0.000 claims abstract description 43
- 238000000034 method Methods 0.000 claims abstract description 34
- 238000005086 pumping Methods 0.000 claims abstract description 29
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 15
- 238000003825 pressing Methods 0.000 claims description 61
- 238000007789 sealing Methods 0.000 claims description 30
- 239000000047 product Substances 0.000 claims description 28
- 238000004321 preservation Methods 0.000 claims description 26
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 239000002131 composite material Substances 0.000 claims description 11
- 230000003213 activating effect Effects 0.000 claims description 10
- 238000002360 preparation method Methods 0.000 claims description 9
- 229910000986 non-evaporable getter Inorganic materials 0.000 claims description 8
- 238000005219 brazing Methods 0.000 claims description 7
- 230000004907 flux Effects 0.000 claims description 7
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 239000011265 semifinished product Substances 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 5
- 238000005452 bending Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 5
- 238000001125 extrusion Methods 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 claims 1
- 239000002184 metal Substances 0.000 claims 1
- 239000007789 gas Substances 0.000 description 19
- 239000013067 intermediate product Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000007769 metal material Substances 0.000 description 4
- 229920001296 polysiloxane Polymers 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 235000013361 beverage Nutrition 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- ZSLUVFAKFWKJRC-IGMARMGPSA-N 232Th Chemical compound [232Th] ZSLUVFAKFWKJRC-IGMARMGPSA-N 0.000 description 1
- 229910052776 Thorium Inorganic materials 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000005247 gettering Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 150000003608 titanium Chemical class 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47G—HOUSEHOLD OR TABLE EQUIPMENT
- A47G19/00—Table service
- A47G19/22—Drinking vessels or saucers used for table service
- A47G19/2205—Drinking glasses or vessels
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47G—HOUSEHOLD OR TABLE EQUIPMENT
- A47G19/00—Table service
- A47G19/22—Drinking vessels or saucers used for table service
- A47G19/2288—Drinking vessels or saucers used for table service with means for keeping liquid cool or hot
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/10—Nuclear fusion reactors
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Thermally Insulated Containers For Foods (AREA)
Abstract
The invention discloses a method for manufacturing an inner titanium and outer stainless steel vacuum heat-insulation container, which comprises the following steps: s1, placing a titanium inner container into a stainless steel middle layer, and fixing a middle getter on the inner side surface of the stainless steel middle layer; s2, fixing the fixing cover outside the middle getter by using a spot welding method; s3, welding the middle-layer bottom with the stainless steel middle layer; s4, laser welding is carried out on the stainless steel middle layer and the stainless steel outer layer; s5, welding the vacuum bottom and the stainless steel outer layer; s6, vacuumizing is performed; s7, manufacturing a connecting ring; s8, welding the connecting ring with the titanium inner container; s9, fixing a silica gel ring below the connecting ring; s10, pumping out the gas of the inner vacuum layer, and forming an inner heat insulation space by the titanium inner container and the stainless steel middle layer by means of a silica gel ring; s11, heating the middle getter layer, and taking out the product to cool to room temperature; s12, welding the stainless steel part on the outer side of the connecting ring with the stainless steel outer layer. Compared with stainless steel, the titanium liner is safer and the welding between the same materials is firmer.
Description
Technical Field
The invention relates to the technical field of cup manufacturing, in particular to a manufacturing method of an inner titanium and outer stainless steel vacuum heat-preservation container.
Background
The vacuum cup is a common drinking vessel, wherein the most important type of vacuum cup is a vacuum cup, namely, the purpose of heat preservation is achieved through a vacuum layer. The vacuum thermos cups on the market at present are mainly stainless steel thermos cups, but the stainless steel thermos cups are easy to corrode when being used for containing partial beverages, so that heavy metals are separated out, the health of human bodies is influenced, and the improvement is needed.
Disclosure of Invention
The invention provides a novel method for manufacturing a vacuum heat-insulation container with stainless steel inside and outside titanium, aiming at the defects that the stainless steel heat-insulation cup in the prior art is easy to corrode when containing partial beverages, so that heavy metals are separated out, the health of a human body is influenced, and the like.
In order to solve the technical problems, the invention is realized by the following technical scheme:
a manufacturing method of a vacuum heat-preservation container with inner titanium and outer stainless steel comprises the following steps:
s1, placing a titanium inner container into a stainless steel middle layer, pushing the titanium inner container upwards to abut against the stainless steel middle layer, and fixing a middle getter on the inner side face of the stainless steel middle layer by using a spot welding method;
s2, taking a fixing cover, and fixing the fixing cover outside the middle-layer getter by using a spot welding method, wherein the fixing cover is made of a metal material;
s3, welding the middle-layer bottom and the stainless steel middle layer;
s4, sleeving the stainless steel outer layer on the outer side of the stainless steel middle layer, carrying out staggered port matching on the stainless steel middle layer and the stainless steel outer layer by taking the port parts as references, and carrying out laser welding on the stainless steel middle layer and the stainless steel outer layer;
s5, taking a vacuum bottom, welding an outer getter on the upper surface of the vacuum bottom, welding the vacuum bottom and a stainless steel outer layer, and forming an outer heat-insulating space between the stainless steel outer layer and a stainless steel middle layer;
s6, placing a brazing flux at the center of a vacuum bottom, then placing the product obtained in the last step into a vacuum furnace, heating, pumping out gas in the outer heat-preservation space from the vacuum bottom, activating a middle-layer getter and an outer-layer getter at high temperature in the vacuum furnace, and then cooling the temperature of the product after vacuum pumping to room temperature;
s7, manufacturing a connecting ring, wherein the outer side of the connecting ring is made of stainless steel and the inner side of the connecting ring is made of titanium;
s8, sleeving the connecting ring outside the opening of the titanium inner container by using a first mold, wherein the upper end surface of the connecting ring is flush with the upper end surface of the opening of the titanium inner container, and welding the connecting ring and the titanium inner container;
s9, sleeving a silica gel ring on the outer side of the titanium inner container, wherein the silica gel ring is fixed below the connecting ring;
s10, pumping out gas of an inner vacuum layer from a gap between the titanium inner container and the stainless steel middle layer by using a second die, pushing the titanium inner container inwards to enable the mouth of the titanium inner container to be flush with the mouth of the stainless steel outer layer, and forming an inner heat insulation space between the titanium inner container and the stainless steel middle layer by means of the silica gel ring;
s11, heating the middle-layer getter by using a second die, activating the middle-layer getter, and taking out the product to cool to room temperature;
and S12, welding the stainless steel part on the outer side of the connecting ring with the stainless steel outer layer.
The titanium inner container is safer compared with stainless steel. The fixing cover is fixed outside the middle layer getter in a spot welding mode, and the operation is simple. The vacuum furnace is heated, the middle-layer getter and the outer-layer getter are activated, the brazing flux melts and flows into the through hole at the vacuum bottom under the influence of gravity, meanwhile, the vacuum furnace pumps gas out of the outer heat-insulation space, the product is cooled to room temperature after the air pumping is finished, the brazing flux is solidified and seals the outer heat-insulation space, and the outer-layer getter can adsorb gas such as hydrogen permeating through the outer layer of the stainless steel, so that the heat-insulation effect of the outer heat-insulation space is better. The clamping ring is used for connecting the titanium inner container and the stainless steel outer layer, and because the welding between the same kind of material is more inseparable, the material in consequently the clamping ring outside is stainless steel and inboard material for titanium, can weld the stainless steel outer layer and the clamping ring better, and the inboard material of clamping ring is titanium, can weld the titanium inner container and the clamping ring better for the thermos cup is more firm. Utilize mould one earlier with clamping of clamping ring and titanium inner bag oral area, then use the vacuum pump in the mould two to take out inlayer vacuum layer gas from titanium inner bag and stainless steel medial gap, and with the outer oral area of stainless steel cover in the clamping ring outside, titanium inner bag oral area, clamping ring oral area flush with the outer oral area of stainless steel this moment, and silica gel circle inboard offsets and outside and the outer counterbalance of stainless steel this moment, forms inclosed interior heat preservation space. And then, the middle layer getter is heated to activate the middle layer getter, and after the temperature is reduced to room temperature, the middle layer getter absorbs gas such as hydrogen permeating through the stainless steel outer layer and the stainless steel middle layer, so that the gas in the inner heat-insulating space is less, and the heat-insulating effect is better.
Preferably, in the method for manufacturing the vacuum thermal insulation container with the stainless steel inside and the stainless steel outside, the step S6 of heating the product after the product is placed in the vacuum furnace includes the following steps:
s6.1: heating to 200 ℃ in 10 minutes, and keeping the constant temperature for 10 minutes;
s6.2: heating to 320 ℃ in 10 minutes, and keeping the constant temperature for 25 minutes;
s6.3: heating to 460-480 ℃ in 15 minutes, and keeping the constant temperature for 45-55 minutes;
s6.4: heating to 520-540 ℃ in 20 minutes, and keeping the constant temperature for 60-90 minutes.
The vacuum furnace is heated in stages, and the constant temperature is kept for a certain time after each stage of heating, so that the vacuum furnace can be heated to the required temperature, and the damage of sudden heating to the vacuum cup can be reduced.
Preferably, in the method for manufacturing a vacuum thermal insulation container made of stainless steel with an inside and an outside made of titanium, the step S7 of manufacturing the connecting ring includes the steps of:
s7.1, taking the steel-titanium composite plate and dividing the steel-titanium composite plate into coil materials with the width of 157 mm;
s7.2, bending the coil stock obtained in the step S7.1, wherein the inner side of the coil stock is made of titanium, and the outer side of the coil stock is made of stainless steel;
s7.3, welding the product obtained in the step S7.2 to form a circular tube;
and S7.4, cutting the round pipe to manufacture the connecting ring.
The connecting ring is made of the steel-titanium composite plate instead of a solid material hollowing mode, so that materials can be saved, and cost can be reduced.
Preferably, in the method for manufacturing the vacuum thermal insulation container with the titanium inside and the stainless steel outside, the inner diameter of the connecting ring is D1, the outer diameter of the connecting ring is D2, the outer diameter of the cup opening of the titanium inner container is W1, the inner diameter of the cup opening of the stainless steel outer layer is W2, and the connecting ring, the titanium inner container and the stainless steel outer layer satisfy the following conditions: w1 ═ D1+ (3-6) mm and D2 ═ W2+ (3-6) mm.
The connecting ring, the titanium inner container and the stainless steel outer layer meet the conditions that: w1 ═ D1+ (3-6) mm, D2 ═ W2+ (3-6) mm can make the clamping ring and titanium inner bag, form interference between clamping ring and the stainless steel skin and be connected for it connects more closely.
Preferably, in the method for manufacturing the vacuum thermal insulation container made of stainless steel with titanium inside and stainless steel outside, the lower part of the connecting ring is provided with an inner cambered surface and an outer cambered surface.
Because the interference connection between the connecting ring and the titanium inner container, between the connecting ring and the stainless steel outer layer, the arrangement of the inner arc surface and the outer arc surface can play a certain guiding role when the connecting ring is sleeved in the titanium inner container and pushed into the stainless steel outer layer, and the loss rate of each component in the matching process is reduced.
Preferably, in the method for manufacturing a vacuum thermal insulation container made of stainless steel with an inner titanium and an outer layer, the difference between the height of the mouth of the stainless steel outer layer and the height of the mouth of the stainless steel middle layer is H1, and H1 is within a range of 3-7 mm, and in the step S7, the length of the connecting ring is H2, and H2 is within a range of 2-6 mm.
The titanium inner bag with the height scope that the mouth part of stainless steel middle level differed is 3 ~ 7mm, and the length scope of clamping ring is 2 ~ 6mm, can be so that the welding spot that leaves behind stainless steel middle level and the welding of stainless steel outer layer can not conflict the clamping ring and lead to the clamping ring can't be pushed into.
Preferably, in the method for manufacturing the vacuum heat-insulating container with the inner titanium layer and the outer stainless steel layer, the middle layer getter and the outer layer getter are non-evaporable getters.
The middle getter and the outer getter are non-evaporable getters, the evaporation temperature is high, and the getters have the air suction performance only after being activated. The activation is to heat the getter properly to make it have strong gettering ability. During activation, the gas emitted by the getter is pumped by a vacuum pump. The activated non-evaporable getter can absorb a large amount of gas at the working temperature. Getter materials commonly used for non-evaporable getters are: titanium, zirconium, tantalum, thorium, and the like.
Preferably, in the manufacturing method of the vacuum heat-insulating container with inner titanium and outer stainless steel, two circles of flanges are arranged on the outer side surface of the silica gel ring, and both the flanges abut against the stainless steel middle layer.
Silica gel circle outside surface is provided with two rings of flanges to two flanges all offset with the stainless steel middle level, can play better sealed effect.
Preferably, in the above method for manufacturing an inner titanium and outer stainless steel vacuum insulation container, in step S11, the fixing cover is heated by high frequency heating to heat the middle getter.
The fixing cover is heated in a high-frequency heating mode so as to heat the middle-layer getter, local heating can be realized, energy consumption is reduced in the production process, and the fixing cover is more environment-friendly.
Preferably, in the method for manufacturing the vacuum thermal insulation container made of stainless steel with an inside and an outside made of titanium, the fixing cover is made of stainless iron.
The stainless iron is more conductive, so the heating effect is better when the high-frequency heating is carried out, the fixing cover surrounds the middle-layer getter, the heating effect is better, and the middle-layer getter can be easily activated.
Preferably, in the above manufacturing method of the vacuum thermal insulation container with inner titanium and outer stainless steel, in the step S8, the mold includes a mold support assembly, a first movable assembly, a second movable assembly, a positioning sleeve, an inner positioning assembly, and a deformation member,
the die bracket component comprises an upper template, a middle template and a lower template, the upper template is fixedly connected with the middle template through an upright post, the middle template is fixedly connected with the lower template through an upright post,
the first movable assembly comprises a first cylinder, an ejector rod and a reset template, the first cylinder is fixed on the lower template, the ejector rod penetrates through the middle template and is connected with the reset template,
the second movable assembly comprises a second cylinder, a connecting piece, a pull rod and a pull head, the second cylinder is fixed on the middle template, the top of the second cylinder is connected with the bottom of the connecting piece, the top of the connecting piece is connected with the bottom of the pull rod, the top of the pull rod is connected with the pull head,
the positioning sleeve is provided with a positioning sleeve step for arranging a connecting ring and is fixedly connected with the die bracket component,
the center of the reset template is opened, the edge of the opening is upwards protruded, the part of the center of the reset template upwards protruded extends into the opening in the center of the upper template, the top of the reset template is connected with the inner positioning component,
the upper side of the deformation piece is connected with the pull head, the lower side of the deformation piece is connected with the upper end of the inner positioning component,
the puller moves downwards under the driving of the second cylinder to extrude the deformation piece, the deformation piece protrudes outwards to abut against the inner wall of the titanium liner, then the second cylinder continues to drive the puller to press downwards and the first cylinder simultaneously drives the reset template to move downwards until the opening part of the titanium liner abuts against the step of the positioning sleeve, and the titanium liner is clamped into the inner side of the connecting ring under the tensile force action of the deformation piece.
When the first mold is used, after a semi-finished product of the vacuum cup is placed, the pull head is driven to pull down the second movable assembly in the first stage, the pull head extrudes the deformation part downwards to enable the deformation part to protrude towards the periphery and compress the titanium liner, during the second stage, the first movable assembly and the second movable assembly are operated together to enable the pull head and the deformation part to move down together with the inner positioning assembly, and meanwhile, due to the fact that the deformation part offsets with the titanium liner, the vacuum cup can be pulled to move down by means of downward friction force generated by the vacuum cup. The deformation piece is to protrusion all around and compress tightly the titanium inner bag, can give an even pulling force of thermos cup inner bag when pulling thermos cup inner bag for the thermos cup inner bag can not warp because of the atress is uneven when the card goes into other parts of thermos cup, and when pulling titanium inner bag card income clamping ring, pull head, deformation piece, interior positioning assembly and titanium inner bag between static relatively.
Preferably, in the manufacturing method of the vacuum heat-insulating container made of stainless steel outside the titanium, the inner positioning assembly is provided with an inner positioning inclined plane and an inner positioning supporting part, the pull head is provided with a pull head inclined plane and a pull head ring platform, the lower side surface of the pull head ring platform abuts against the upper side of the deformation part, the inner positioning assembly has deformation capacity, the pull head moves downwards under the driving of the second cylinder and extrudes the deformation part to abut against the inner wall of the titanium inner container, and meanwhile the inclined plane of the pull head extrudes the inner positioning inclined plane to enable the inner positioning supporting part to outwards support the opening part of the titanium inner container.
The setting on interior location inclined plane and pull head inclined plane makes interior location subassembly can be more smooth when receiving the outside expansion of power on pull head inclined plane, has reduced the loss at the operation in-process between each part, has prolonged the life-span of mould. The interior location supporting part set up in on the interior location subassembly, when the outside expansion of interior location subassembly, interior location supporting part also outwards removes and offsets with thermos cup inner bag oral area, further provides the support when the other parts of card income thermos cup for the thermos cup inner bag, makes its non-deformable in assembling process.
Preferably, in the manufacturing method of the vacuum thermal insulation container with the inner titanium and the outer stainless steel, the second mold in the step S10 includes a lower pressing head, a lower pressing ejector rod, a fixed lower mold, a pressing plate, a shell mounting bracket, a telescopic member, a vacuum pump, and a heater, the fixed lower mold is provided with a cup body fixing portion, the cup body fixing portion is provided with a first sealing member, the outer layer of the stainless steel abuts against the first sealing member when being placed in the fixed lower mold, the lower pressing ejector rod penetrates through the cup body fixing portion and is connected with the pressing plate, a second sealing member is arranged between the lower pressing ejector rod and the cup body fixing portion, the fixed lower mold forms an air exhaust space inside by means of the first sealing member and the second sealing member, the telescopic member is placed at the bottom of the air exhaust space, the shell mounting bracket is placed on the telescopic member, and the pressing plate is connected with the shell mounting bracket, the telescopic piece, the shell mounting support, the pressure plate and the pressing ejector rod form a preparation position and a pressing position under the matching of the pressing head, the fixed lower die is provided with an exhaust channel at the bottom of the inner side of the pumping space, the exhaust channel is communicated with the pumping space and the vacuum pump,
and (4) placing the semi-finished product obtained in the step (S9) into a second die, enabling the stainless steel outer layer to abut against the first sealing element and to be separated from the mouth of the titanium liner by means of the shell mounting support, starting a vacuum pump to pump gas out from an air pumping space through an exhaust channel, enabling the mouth of the stainless steel outer layer to be separated from the mouth of the titanium liner by the shell mounting support in a preparation position, enabling the mouth of the stainless steel outer layer to be connected with the connecting ring by a lower pressing head to press the stainless steel outer layer and the lower pressing ejector rod in a pressing position, and enabling the lower pressing ejector rod to drive the pressing plate to apply force to the shell mounting support in the pressing position so that the shell mounting support can move downwards after pressing the telescopic piece.
The second mold integrates the required equipment of the vacuum cup in the processing steps S10 and S11, and the processing procedure of the vacuum cup is simplified. The design of the shell mounting support can enable the stainless steel outer layer to be separated from the opening of the titanium inner container, and an enough exhaust channel is reserved. The extensible member both can play the effect that the support shell settled and held in the palm, can provide the space of pushing down for the block of follow-up stainless steel skin and clamping ring again.
Preferably, in the method for manufacturing the vacuum thermal insulation container made of stainless steel with an inner titanium and an outer titanium, the fixed lower mold is provided with an exhaust groove at the bottom of the inner side of the exhaust space, and the exhaust groove is communicated with the exhaust channel.
The arrangement of the exhaust groove enables the gas in the exhaust space to be more smoothly exhausted.
Drawings
FIG. 1 is a schematic view of the structure of an intermediate product produced in step S1 according to the present invention;
FIG. 2 is a schematic structural diagram of an intermediate product produced in step S2 according to the present invention;
FIG. 3 is a schematic structural diagram of an intermediate product produced in step S3 according to the present invention;
FIG. 4 is a schematic view of the structure of the intermediate product manufactured in step S4 according to the present invention;
FIG. 5 is an enlarged view of a portion of FIG. 4 at A;
FIG. 6 is a schematic structural diagram of an intermediate product produced in step S5 according to the present invention;
FIG. 7 is a schematic structural diagram of an intermediate product produced in step S6 according to the present invention;
FIG. 8 is a schematic structural diagram of an intermediate product produced in step S8 according to the present invention;
FIG. 9 is an enlarged view of a portion of FIG. 8 at B;
FIG. 10 is a schematic view of the structure of the connection ring of the present invention;
FIG. 11 is a schematic view of a partial structure of a titanium liner of the present invention;
FIG. 12 is a partial structural view of the outer layer of stainless steel in the present invention;
FIG. 13 is a schematic structural diagram of an intermediate product produced in step S9 according to the present invention;
FIG. 14 is an enlarged view of a portion of FIG. 13 at C;
FIG. 15 is a schematic view of the product of step S12 in the present invention;
FIG. 16 is an enlarged view of a portion of FIG. 15 at D;
FIG. 17 is a schematic structural diagram of a first mold of the present invention;
FIG. 18 is a cross-sectional view of a first mold of the present invention;
FIG. 19 is a schematic view of the structure at E in FIG. 18;
FIG. 20 is a cross-sectional view of a second mold of the present invention during vacuum evacuation;
FIG. 21 is a cross-sectional view of the second mold of the present invention after the stainless steel outer layer is engaged with the connecting ring.
Detailed Description
The invention will be described in further detail below with reference to the accompanying figures 1-21 and the detailed description of the invention, which are not intended to limit the invention:
example 1
A manufacturing method of a vacuum heat-preservation container with inner titanium and outer stainless steel comprises the following steps:
s1, putting a titanium liner 1 into a stainless steel middle layer 2, pushing the titanium liner 1 upwards to abut against the stainless steel middle layer 2, and fixing a middle-layer getter 21 on the inner side surface of the stainless steel middle layer 2 by using a spot welding method;
s2, taking the fixing cover 22, fixing the fixing cover 22 outside the middle-layer getter 21 by using a spot welding method, wherein the fixing cover 22 is made of a metal material;
s3, welding the middle layer bottom 23 with the stainless steel middle layer 2;
s4, sleeving the stainless steel outer layer 3 outside the stainless steel middle layer 2, carrying out staggered port matching on the stainless steel middle layer 2 and the stainless steel outer layer 3 by taking the port parts as references, and carrying out laser welding on the stainless steel middle layer 2 and the stainless steel outer layer 3;
s5, taking the vacuum bottom 31, welding an outer getter 32 on the upper surface of the vacuum bottom 31, welding the vacuum bottom 31 and the stainless steel outer layer 3, and forming an outer heat-preservation space 33 between the stainless steel outer layer 3 and the stainless steel middle layer 2;
s6, placing a brazing flux at the center of a vacuum bottom 31, then placing the product obtained in the previous step into a vacuum furnace, heating, pumping out gas in the outer heat-preservation space 33 from the vacuum bottom 31, activating a middle-layer getter 21 and an outer-layer getter 32 at a high temperature in the vacuum furnace, and then cooling the temperature of the product after vacuum pumping to room temperature;
s7, manufacturing a connecting ring 4, wherein the outer side of the connecting ring 4 is made of stainless steel and the inner side of the connecting ring 4 is made of titanium;
s8, sleeving the connecting ring 4 outside the opening of the titanium liner 1 by using a first mold 6, enabling the upper end surface of the connecting ring 4 to be flush with the upper end surface of the opening of the titanium liner 1, and welding the connecting ring 4 and the titanium liner 1;
s9, sleeving a silica gel ring 5 on the outer side of the titanium inner container 1, wherein the silica gel ring 5 is fixed below the connecting ring 4;
s10, pumping inner layer vacuum layer gas out of a gap between the titanium liner 1 and the stainless steel middle layer 2 by using a second die 7, pushing the titanium liner 1 inwards to enable the mouth of the titanium liner 1 to be flush with the mouth of the stainless steel outer layer 3, and forming an inner heat insulation space 24 between the titanium liner 1 and the stainless steel middle layer 2 by means of the silica gel ring 5;
s11, heating the middle-layer getter 21 by using a second die 7, activating the middle-layer getter 21, and taking out the product to cool to room temperature;
s12, welding the stainless steel part on the outer side of the connecting ring 4 with the stainless steel outer layer 3.
Preferably, the heating after the product is put into the vacuum furnace in step S6 includes the steps of:
s6.1: heating to 200 ℃ in 10 minutes, and keeping the constant temperature for 10 minutes;
s6.2: heating to 320 ℃ in 10 minutes, and keeping the constant temperature for 25 minutes;
s6.3: heating to 460 ℃ in 15 minutes, and keeping the constant temperature for 45 minutes;
s6.4: the temperature was raised to 520 ℃ over 20 minutes and held at constant temperature for 60 minutes.
Preferably, the step of manufacturing the connection ring 4 in the step S7 includes the steps of:
s7.1, taking the steel-titanium composite plate and dividing the steel-titanium composite plate into coil materials with the width of 157 mm;
s7.2, bending the coil stock obtained in the step S7.1, wherein the inner side of the coil stock is made of titanium, and the outer side of the coil stock is made of stainless steel;
s7.3, welding the product obtained in the step S7.2 to form a circular tube;
and S7.4, cutting the round pipe to manufacture the connecting ring 4.
Preferably, the inner diameter of the connecting ring 4 is D1, the outer diameter of the connecting ring 4 is D2, the outer diameter of the cup opening of the titanium inner container 1 is W1, the inner diameter of the cup opening of the stainless steel outer layer 3 is W2, and the connecting ring 4, the titanium inner container 1 and the stainless steel outer layer 3 satisfy the following conditions: w1 ═ D1+3mm and D2 ═ W2+3 mm.
Preferably, the lower portion of the connecting ring 4 is provided with an inner arc surface 41 and an outer arc surface 42.
Preferably, the difference between the stainless steel outer layer 3 and the stainless steel middle layer 2 is height H1, H1 is 3mm, and the length of the connecting ring 4 in the step S7 is H2, and H2 is 2 mm.
Preferably, the middle getter 21 and the outer getter 32 are non-evaporable getters.
Preferably, the outer surface of the silicone ring 5 is provided with two rings of flanges 51, and both of the flanges 51 abut against the stainless steel middle layer 2.
Preferably, in step S11, the fixing cover 22 is heated by high frequency heating to heat the middle getter 21.
Preferably, the material of the fixing cover 22 is stainless iron.
Preferably, in the step S8, the mold one 6 includes a mold support assembly 61, a first movable assembly 62, a second movable assembly 63, a positioning sleeve 64, an inner positioning assembly 65, and a deformation member 66,
the mold bracket assembly 61 comprises an upper mold plate 611, a middle mold plate 612 and a lower mold plate 613, wherein the upper mold plate 611 and the middle mold plate 612 are fixedly connected through a pillar, the middle mold plate 612 and the lower mold plate 613 are fixedly connected through a pillar,
the first movable assembly 62 comprises a first cylinder 621, an ejector rod 622 and a reset template 623, the first cylinder 621 is fixed on the lower template 613, the ejector rod 622 passes through the middle template 612 and is connected with the reset template 623,
the second movable assembly 63 includes a second cylinder 631, a connecting member 632, a pull rod 633 and a pull head 634, the second cylinder 631 is fixed on the middle mold plate 612, the top of the second cylinder 631 is connected with the bottom of the connecting member 632, the top of the connecting member 632 is connected with the bottom of the pull rod 633, the top of the pull rod 633 is connected with the pull head 634,
the positioning sleeve 64 is provided with a positioning sleeve step 641 for mounting the connecting ring 4, the positioning sleeve 64 is fixedly connected with the mold bracket assembly 61,
the center of the reset template 623 is open and the edge of the opening is upward convex, the central upward convex part of the reset template 623 extends into the opening at the center of the upper template 611 and the top of the reset template 623 is connected with the inner positioning component 65,
the upper side of the deformation member 66 is connected to the pulling head 634 and the lower side of the deformation member 66 is connected to the upper end of the inner positioning assembly 65,
the slider 634 downwards moves to extrude the deformation part 66 under the driving of the second cylinder 631, the outward protrusion of the deformation part 66 abuts against the inner wall of the titanium liner 1, then the second cylinder 631 continuously drives the slider 634 to downwards press, the first cylinder 621 simultaneously drives the reset template 623 to downwards move until the opening of the titanium liner 1 abuts against the positioning sleeve step 641, and the titanium liner 1 is clamped into the inner side of the connecting ring 4 under the action of the tensile force of the deformation part 66.
Preferably, the inner positioning assembly 65 is provided with an inner positioning inclined plane 651 and an inner positioning support portion 652, the slider 634 is provided with a slider inclined plane 6341 and a slider ring platform 6342, the lower side surface of the slider ring platform 6342 abuts against the upper side of the deformation member 66, the inner positioning assembly 65 has a deformation capability, the slider 634 moves downwards under the driving of the second cylinder 631 and presses the deformation member 66 to abut against the inner wall of the titanium inner container 1, and simultaneously the inclined plane of the slider 634 presses the inner positioning inclined plane 651 to enable the inner positioning support portion 652 to support the mouth portion of the titanium inner container 1 outwards.
Preferably, in step S10, the second mold 7 includes a lower pressing head 71, a lower pressing rod 72, a fixed lower mold 73, a pressing plate 74, a housing mounting bracket 75, an expansion member 76, a vacuum pump 77, and a heater 79, the fixed lower mold 73 is provided with a cup fixing part 731, the cup fixing part 731 is provided with a first sealing member 732, the stainless steel outer layer 3 abuts against the first sealing member 732 when being inserted into the fixed lower mold 73, the lower pressing rod 72 passes through the cup fixing part 731 and is connected to the pressing plate 74, a second sealing member 733 is provided between the lower pressing rod 72 and the cup fixing part 731, the fixed lower mold 73 forms an air suction space 78 inside by means of the first sealing member 732 and the second sealing member 733, the expansion member 76 is disposed at the bottom of the air suction space 78, the housing mounting bracket 75 is disposed on the expansion member 76, and the pressing plate 74 is connected to the housing mounting bracket 75, the telescopic member 76, the housing seat 75, the pressure plate 74 and the push-down rod 72 form a preparation position and a push-down position under the cooperation of the push-down head 71, the fixed lower die 73 is provided with an exhaust passage 734 at the bottom of the inner side of the pumping space 78, the exhaust passage 734 communicates the pumping space 78 and the vacuum pump 77,
placing the semi-finished product obtained in the step S9 into a second mold with the mouth facing downward, the stainless steel outer layer 3 abutting against the first sealing member 732 and being separated from the mouth of the titanium liner 1 by the housing mounting support 75, starting the vacuum pump 77 to pump the gas from the pumping space 78 through the exhaust passage 734, in the preparation position, the housing mounting support 75 separating the mouth of the stainless steel outer layer 3 from the mouth of the titanium liner 1, in the pressing position, the lower press head 71 pressing the stainless steel outer layer 3 and the lower press rod 72 to connect the mouth of the stainless steel outer layer 3 with the connecting ring 4, and in the pressing position, the lower press rod 72 driving the press plate 74 to apply force to the housing mounting support 75 to press the telescopic member 76 and then move downward.
Preferably, the fixed lower mold 73 is provided with an air discharge groove 735 at a bottom portion inside the air suction space 78, and the air discharge groove 735 is communicated with the air discharge passage 734.
Example 2
A manufacturing method of a vacuum heat-preservation container with inner titanium and outer stainless steel comprises the following steps:
s1, putting a titanium liner 1 into a stainless steel middle layer 2, pushing the titanium liner 1 upwards to abut against the stainless steel middle layer 2, and fixing a middle-layer getter 21 on the inner side surface of the stainless steel middle layer 2 by using a spot welding method;
s2, taking the fixing cover 22, and fixing the fixing cover 22 outside the middle-layer getter 21 by using a spot welding method, wherein the fixing cover 22 is made of a metal material;
s3, welding the middle layer bottom 23 with the stainless steel middle layer 2;
s4, sleeving the stainless steel outer layer 3 outside the stainless steel middle layer 2, carrying out staggered port matching on the stainless steel middle layer 2 and the stainless steel outer layer 3 by taking the port parts as references, and carrying out laser welding on the stainless steel middle layer 2 and the stainless steel outer layer 3;
s5, taking the vacuum bottom 31, welding an outer getter 32 on the upper surface of the vacuum bottom 31, welding the vacuum bottom 31 and the stainless steel outer layer 3, and forming an outer heat-preservation space 33 between the stainless steel outer layer 3 and the stainless steel middle layer 2;
s6, placing a brazing flux at the center of the vacuum bottom 31, then placing the product obtained in the previous step into a vacuum furnace, heating, pumping out gas in the outer heat-preservation space 33 from the vacuum bottom 31, activating the middle-layer getter 21 and the outer-layer getter 32 at high temperature in the vacuum furnace, and then cooling the temperature of the product after vacuum pumping to room temperature;
s7, manufacturing a connecting ring 4, wherein the outer side of the connecting ring 4 is made of stainless steel and the inner side of the connecting ring 4 is made of titanium;
s8, sleeving the connecting ring 4 outside the opening of the titanium liner 1 by using a first mold 6, enabling the upper end surface of the connecting ring 4 to be flush with the upper end surface of the opening of the titanium liner 1, and welding the connecting ring 4 and the titanium liner 1;
s9, sleeving a silica gel ring 5 on the outer side of the titanium inner container 1, wherein the silica gel ring 5 is fixed below the connecting ring 4;
s10, pumping inner layer vacuum layer gas out of a gap between the titanium liner 1 and the stainless steel middle layer 2 by using a second die 7, pushing the titanium liner 1 inwards to enable the mouth of the titanium liner 1 to be flush with the mouth of the stainless steel outer layer 3, and forming an inner heat insulation space 24 between the titanium liner 1 and the stainless steel middle layer 2 by means of the silica gel ring 5;
s11, heating the middle layer getter 21 by using a second die 7, activating the middle layer getter 21, and taking out a product to cool to room temperature;
s12, welding the stainless steel part on the outer side of the connecting ring 4 with the stainless steel outer layer 3.
Preferably, the heating after the product is put into the vacuum furnace in step S6 includes the steps of:
s6.1: heating to 200 ℃ in 10 minutes, and keeping the constant temperature for 10 minutes;
s6.2: heating to 320 ℃ in 10 minutes, and keeping the constant temperature for 25 minutes;
s6.3: heating to 480 ℃ within 15 minutes, and keeping the constant temperature for 55 minutes;
s6.4: the temperature was raised to 540 ℃ over 20 minutes and kept constant for 90 minutes.
Preferably, the step of manufacturing the connection ring 4 in the step S7 includes the steps of:
s7.1, taking the steel-titanium composite plate and dividing the steel-titanium composite plate into coil materials with the width of 157 mm;
s7.2, bending the coil stock obtained in the step S7.1, wherein the inner side of the coil stock is made of titanium, and the outer side of the coil stock is made of stainless steel;
s7.3, welding the product obtained in the step S7.2 to form a circular tube;
and S7.4, cutting the round pipe to manufacture the connecting ring 4.
Preferably, the inner diameter of the connecting ring 4 is D1, the outer diameter of the connecting ring 4 is D2, the outer diameter of the cup opening of the titanium inner container 1 is W1, the inner diameter of the cup opening of the stainless steel outer layer 3 is W2, and the connecting ring 4, the titanium inner container 1 and the stainless steel outer layer 3 satisfy the following conditions: w1 ═ D1+6mm and D2 ═ W2+6 mm.
Preferably, the lower portion of the connecting ring 4 is provided with an inner arc surface 41 and an outer arc surface 42.
Preferably, the difference between the stainless steel outer layer 3 and the stainless steel middle layer 2 is height H1, H1 is 7mm, and the length of the connecting ring 4 in the step S7 is H2, and H2 is 6 mm.
Preferably, the middle getter 21 and the outer getter 32 are non-evaporable getters.
Preferably, the outer surface of the silicone ring 5 is provided with two rings of flanges 51, and both of the flanges 51 abut against the stainless steel middle layer 2.
Preferably, in step S11, the fixing cover 22 is heated by high frequency heating to heat the middle getter 21.
Preferably, the material of the fixing cover 22 is stainless iron.
Preferably, in the step S8, the mold one 6 includes a mold support assembly 61, a first movable assembly 62, a second movable assembly 63, a positioning sleeve 64, an inner positioning assembly 65, and a deformation member 66,
the mold bracket assembly 61 comprises an upper mold plate 611, a middle mold plate 612 and a lower mold plate 613, wherein the upper mold plate 611 and the middle mold plate 612 are fixedly connected through a pillar, the middle mold plate 612 and the lower mold plate 613 are fixedly connected through a pillar,
the first movable assembly 62 comprises a first cylinder 621, an ejector rod 622 and a reset template 623, the first cylinder 621 is fixed on the lower template 613, the ejector rod 622 passes through the middle template 612 and is connected with the reset template 623,
the second movable assembly 63 includes a second cylinder 631, a connecting member 632, a pull rod 633 and a slider 634, the second cylinder 631 is fixed on the middle mold plate 612, the top of the second cylinder 631 is connected with the bottom of the connecting member 632, the top of the connecting member 632 is connected with the bottom of the pull rod 633, the top of the pull rod 633 is connected with the slider 634,
the positioning sleeve 64 is provided with a positioning sleeve step 641 for mounting the connecting ring 4, the positioning sleeve 64 is fixedly connected with the mold bracket assembly 61,
the center of the reset template 623 is open and the edge of the opening is upward convex, the central upward convex part of the reset template 623 extends into the opening at the center of the upper template 611 and the top of the reset template 623 is connected with the inner positioning component 65,
the upper side of the deformation member 66 is connected to the pulling head 634 and the lower side of the deformation member 66 is connected to the upper end of the inner positioning assembly 65,
the slider 634 is driven by the second cylinder 631 to move downwards to extrude the deformation part 66, the deformation part 66 protrudes outwards to abut against the inner wall of the titanium liner 1, then the second cylinder 631 continues to drive the slider 634 to press downwards, the first cylinder 621 simultaneously drives the reset template 623 to move downwards until the opening of the titanium liner 1 abuts against the positioning sleeve step 641, and the titanium liner 1 is clamped into the inner side of the connecting ring 4 under the action of the tensile force of the deformation part 66.
Preferably, the inner positioning assembly 65 is provided with an inner positioning inclined plane 651 and an inner positioning support portion 652, the slider 634 is provided with a slider inclined plane 6341 and a slider ring platform 6342, the lower side surface of the slider ring platform 6342 abuts against the upper side of the deformation member 66, the inner positioning assembly 65 has a deformation capability, the slider 634 moves downwards under the driving of the second cylinder 631 and presses the deformation member 66 to abut against the inner wall of the titanium inner container 1, and simultaneously the inclined plane of the slider 634 presses the inner positioning inclined plane 651 to enable the inner positioning support portion 652 to support the mouth portion of the titanium inner container 1 outwards.
Preferably, in step S10, the second mold 7 includes a lower pressing head 71, a lower pressing rod 72, a fixed lower mold 73, a pressing plate 74, a housing mounting bracket 75, an expansion member 76, a vacuum pump 77, and a heater 79, the fixed lower mold 73 is provided with a cup fixing part 731, the cup fixing part 731 is provided with a first sealing member 732, the stainless steel outer layer 3 abuts against the first sealing member 732 when being inserted into the fixed lower mold 73, the lower pressing rod 72 passes through the cup fixing part 731 and is connected to the pressing plate 74, a second sealing member 733 is provided between the lower pressing rod 72 and the cup fixing part 731, the fixed lower mold 73 forms an air suction space 78 inside by means of the first sealing member 732 and the second sealing member 733, the expansion member 76 is disposed at the bottom of the air suction space 78, the housing mounting bracket 75 is disposed on the expansion member 76, and the pressing plate 74 is connected to the housing mounting bracket 75, the telescopic member 76, the housing mounting bracket 75, the pressure plate 74 and the push-down ram 72 form a preparation position and a push-down position under the cooperation of the push-down head 71, the fixed lower die 73 is provided with an exhaust passage 734 at the bottom of the inner side of the pumping space 78, the exhaust passage 734 communicates the pumping space 78 with the vacuum pump 77,
placing the semi-finished product obtained in step S9 into a second mold with the mouth facing downward, wherein the stainless steel outer layer 3 abuts against the first sealing member 732 and is separated from the mouth of the titanium liner 1 by means of the housing mounting support 75, starting the vacuum pump 77 to pump air from the air pumping space 78 through the air exhaust channel 734, in the preparation position, the housing mounting support 75 separates the mouth of the stainless steel outer layer 3 from the mouth of the titanium liner 1, in the compaction position, the lower press head 71 presses down the stainless steel outer layer 3 and the lower press ejector rod 72 to connect the mouth of the stainless steel outer layer 3 with the connecting ring 4, and in the compaction position, the lower press ejector rod 72 drives the press plate 74 to apply force to the housing mounting support 75 so that the housing mounting support 75 presses the extensible member 76 and then moves downward.
Preferably, the fixed lower mold 73 is provided with a vent groove 735 at a bottom portion inside the air exhaust space 78, and the vent groove 735 communicates with the vent path 734.
Example 3
A manufacturing method of an inner titanium and outer stainless steel vacuum heat-preservation container comprises the following steps:
s1, putting a titanium liner 1 into a stainless steel middle layer 2, pushing the titanium liner 1 upwards to abut against the stainless steel middle layer 2, and fixing a middle-layer getter 21 on the inner side surface of the stainless steel middle layer 2 by using a spot welding method;
s2, taking the fixing cover 22, fixing the fixing cover 22 outside the middle-layer getter 21 by using a spot welding method, wherein the fixing cover 22 is made of a metal material;
s3, welding the middle layer bottom 23 with the stainless steel middle layer 2;
s4, sleeving the stainless steel outer layer 3 outside the stainless steel middle layer 2, carrying out staggered opening matching on the stainless steel middle layer 2 and the stainless steel outer layer 3 by taking the opening parts as a reference, and carrying out laser welding on the stainless steel middle layer 2 and the stainless steel outer layer 3;
s5, taking the vacuum bottom 31, welding an outer getter 32 on the upper surface of the vacuum bottom 31, welding the vacuum bottom 31 and the stainless steel outer layer 3, and forming an outer heat-preservation space 33 between the stainless steel outer layer 3 and the stainless steel middle layer 2;
s6, placing a brazing flux at the center of the vacuum bottom 31, then placing the product obtained in the previous step into a vacuum furnace, heating, pumping out gas in the outer heat-preservation space 33 from the vacuum bottom 31, activating the middle-layer getter 21 and the outer-layer getter 32 at high temperature in the vacuum furnace, and then cooling the temperature of the product after vacuum pumping to room temperature;
s7, manufacturing a connecting ring 4, wherein the outer side of the connecting ring 4 is made of stainless steel and the inner side of the connecting ring 4 is made of titanium;
s8, sleeving the connecting ring 4 outside the opening of the titanium liner 1 by using a first die 6, enabling the upper end surface of the connecting ring 4 to be flush with the upper end surface of the opening of the titanium liner 1, and welding the connecting ring 4 and the titanium liner 1;
s9, sleeving a silica gel ring 5 on the outer side of the titanium inner container 1, wherein the silica gel ring 5 is fixed below the connecting ring 4;
s10, pumping inner layer vacuum layer gas out of a gap between the titanium liner 1 and the stainless steel middle layer 2 by using a second mold 7, pushing the titanium liner 1 inwards to enable the mouth part of the titanium liner 1 to be flush with the mouth part of the stainless steel outer layer 3, and forming an inner heat insulation space 24 between the titanium liner 1 and the stainless steel middle layer 2 by means of the silica gel ring 5;
s11, heating the middle layer getter 21 by using a second die 7, activating the middle layer getter 21, and taking out a product to cool to room temperature;
and S12, welding the stainless steel part on the outer side of the connecting ring 4 with the stainless steel outer layer 3.
Preferably, the heating after the product is put into the vacuum furnace in step S6 includes the steps of:
s6.1: heating to 200 ℃ in 10 minutes, and keeping the constant temperature for 10 minutes;
s6.2: heating to 320 ℃ in 10 minutes, and keeping the constant temperature for 25 minutes;
s6.3: heating to 470 ℃ in 15 minutes, and keeping the constant temperature for 50 minutes;
s6.4: the temperature was raised to 530 ℃ over 20 minutes, and the temperature was maintained for 75 minutes.
Preferably, the step of manufacturing the connection ring 4 in the step S7 includes the steps of:
s7.1, taking the steel-titanium composite plate and dividing the steel-titanium composite plate into coil materials with the width of 157 mm;
s7.2, bending the coil stock obtained in the step S7.1, wherein the inner side of the coil stock is made of titanium, and the outer side of the coil stock is made of stainless steel;
s7.3, welding the product obtained in the step S7.2 to form a circular tube;
and S7.4, cutting the round pipe to manufacture the connecting ring 4.
Preferably, the inner diameter of the connecting ring 4 is D1, the outer diameter of the connecting ring 4 is D2, the outer diameter of the cup opening of the titanium inner container 1 is W1, the inner diameter of the cup opening of the stainless steel outer layer 3 is W2, and the connecting ring 4, the titanium inner container 1 and the stainless steel outer layer 3 satisfy the following conditions: w1 ═ D1+4.5mm and D2 ═ W2+4.5 mm.
Preferably, the lower portion of the connecting ring 4 is provided with an inner arc surface 41 and an outer arc surface 42.
Preferably, the height difference between the mouth parts of the stainless steel outer layer 3 and the stainless steel middle layer 2 is H1, H1 is 5mm, and the length of the connecting ring 4 in the step S7 is H2, and H2 is 4 mm.
Preferably, the middle getter 21 and the outer getter 32 are non-evaporable getters.
Preferably, the outer surface of the silicone ring 5 is provided with two rings of flanges 51, and both of the flanges 51 abut against the stainless steel middle layer 2.
Preferably, in step S11, the fixing cover 22 is heated by high frequency heating to heat the middle getter 21.
Preferably, the material of the fixing cover 22 is stainless iron.
Preferably, in the step S8, the mold one 6 includes a mold support assembly 61, a first movable assembly 62, a second movable assembly 63, a positioning sleeve 64, an inner positioning assembly 65, and a deformation member 66,
the mold support assembly 61 comprises an upper mold plate 611, a middle mold plate 612 and a lower mold plate 613, the upper mold plate 611 is fixedly connected with the middle mold plate 612 through a pillar, the middle mold plate 612 is fixedly connected with the lower mold plate 613 through a pillar,
the first movable assembly 62 comprises a first cylinder 621, an ejector rod 622 and a reset template 623, the first cylinder 621 is fixed on the lower template 613, the ejector rod 622 passes through the middle template 612 and is connected with the reset template 623,
the second movable assembly 63 includes a second cylinder 631, a connecting member 632, a pull rod 633 and a slider 634, the second cylinder 631 is fixed on the middle mold plate 612, the top of the second cylinder 631 is connected with the bottom of the connecting member 632, the top of the connecting member 632 is connected with the bottom of the pull rod 633, the top of the pull rod 633 is connected with the slider 634,
the positioning sleeve 64 is provided with a positioning sleeve step 641 for mounting the connecting ring 4, the positioning sleeve 64 is fixedly connected with the die support assembly 61,
the center of the reset template 623 is open and the edge of the opening is upward convex, the central upward convex part of the reset template 623 extends into the opening at the center of the upper template 611 and the top of the reset template 623 is connected with the inner positioning component 65,
the upper side of the deformation member 66 is connected to the pulling head 634 and the lower side of the deformation member 66 is connected to the upper end of the inner positioning assembly 65,
the slider 634 downwards moves to extrude the deformation part 66 under the driving of the second cylinder 631, the outward protrusion of the deformation part 66 abuts against the inner wall of the titanium liner 1, then the second cylinder 631 continuously drives the slider 634 to downwards press, the first cylinder 621 simultaneously drives the reset template 623 to downwards move until the opening of the titanium liner 1 abuts against the positioning sleeve step 641, and the titanium liner 1 is clamped into the inner side of the connecting ring 4 under the action of the tensile force of the deformation part 66.
Preferably, the inner positioning assembly 65 is provided with an inner positioning inclined plane 651 and an inner positioning support portion 652, the slider 634 is provided with a slider inclined plane 6341 and a slider ring platform 6342, the lower side surface of the slider ring platform 6342 abuts against the upper side of the deformation member 66, the inner positioning assembly 65 has a deformation capability, the slider 634 moves downwards under the driving of the second cylinder 631 and presses the deformation member 66 to abut against the inner wall of the titanium inner container 1, and simultaneously the inclined plane of the slider 634 presses the inner positioning inclined plane 651 to enable the inner positioning support portion 652 to support the mouth portion of the titanium inner container 1 outwards.
Preferably, in step S10, the second mold 7 includes a lower pressing head 71, a lower pressing rod 72, a fixed lower mold 73, a pressing plate 74, a housing mounting bracket 75, an expansion member 76, a vacuum pump 77, and a heater 79, the fixed lower mold 73 is provided with a cup fixing part 731, the cup fixing part 731 is provided with a first sealing member 732, the stainless steel outer layer 3 abuts against the first sealing member 732 when being inserted into the fixed lower mold 73, the lower pressing rod 72 passes through the cup fixing part 731 and is connected to the pressing plate 74, a second sealing member 733 is provided between the lower pressing rod 72 and the cup fixing part 731, the fixed lower mold 73 forms an air suction space 78 inside by means of the first sealing member 732 and the second sealing member 733, the expansion member 76 is disposed at the bottom of the air suction space 78, the housing mounting bracket 75 is disposed on the expansion member 76, and the pressing plate 74 is connected to the housing mounting bracket 75, the telescopic member 76, the housing mounting bracket 75, the pressure plate 74 and the push-down ram 72 form a preparation position and a push-down position under the cooperation of the push-down head 71, the fixed lower die 73 is provided with an exhaust passage 734 at the bottom of the inner side of the pumping space 78, the exhaust passage 734 communicates the pumping space 78 with the vacuum pump 77,
placing the semi-finished product obtained in the step S9 into a second mold with the mouth facing downward, the stainless steel outer layer 3 abutting against the first sealing member 732 and being separated from the mouth of the titanium liner 1 by the housing mounting support 75, starting the vacuum pump 77 to pump the gas from the pumping space 78 through the exhaust passage 734, in the preparation position, the housing mounting support 75 separating the mouth of the stainless steel outer layer 3 from the mouth of the titanium liner 1, in the pressing position, the lower press head 71 pressing the stainless steel outer layer 3 and the lower press rod 72 to connect the mouth of the stainless steel outer layer 3 with the connecting ring 4, and in the pressing position, the lower press rod 72 driving the press plate 74 to apply force to the housing mounting support 75 to press the telescopic member 76 and then move downward.
Preferably, the fixed lower mold 73 is provided with a vent groove 735 at a bottom portion inside the air exhaust space 78, and the vent groove 735 communicates with the vent path 734.
In summary, the above-mentioned embodiments are only preferred embodiments of the present invention, and all equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the present invention.
Claims (14)
1. The manufacturing method of the vacuum heat-preservation container with the inner titanium and the outer stainless steel is characterized by comprising the following steps of:
s1, placing a titanium inner container (1) into a stainless steel middle layer (2), pushing the titanium inner container (1) upwards to abut against the stainless steel middle layer (2), and fixing a middle-layer getter (21) on the inner side surface of the stainless steel middle layer (2) by using a spot welding method;
s2, taking the fixing cover (22), and fixing the fixing cover (22) outside the middle-layer getter (21) by using a spot welding method, wherein the fixing cover (22) is made of metal;
s3, welding the middle layer bottom (23) with the stainless steel middle layer (2);
s4, sleeving the stainless steel outer layer (3) on the outer side of the stainless steel middle layer (2), carrying out staggered port matching on the stainless steel middle layer (2) and the stainless steel outer layer (3) by taking the port part as a reference, and carrying out laser welding on the stainless steel middle layer (2) and the stainless steel outer layer (3);
s5, taking the vacuum bottom (31), welding an outer getter (32) on the upper surface of the vacuum bottom (31), welding the vacuum bottom (31) and the stainless steel outer layer (3), and forming an outer heat-insulating space (33) between the stainless steel outer layer (3) and the stainless steel middle layer (2);
s6, placing a brazing flux at the center of a vacuum bottom (31), then placing the product obtained in the last step into a vacuum furnace, heating, extracting gas in the outer heat-preservation space (33) from the vacuum bottom (31), activating a middle-layer getter (21) and an outer-layer getter (32) at high temperature in the vacuum furnace, and then cooling the temperature of the product after vacuum-pumping to room temperature;
s7, manufacturing a connecting ring (4), wherein the outer side of the connecting ring (4) is made of stainless steel and the inner side of the connecting ring is made of titanium;
s8, sleeving the connecting ring (4) on the outer side of the opening of the titanium liner (1) by using a first die (6), enabling the upper end face of the connecting ring (4) to be flush with the upper end face of the opening of the titanium liner (1), and welding the connecting ring (4) and the titanium liner (1);
s9, sleeving a silica gel ring (5) on the outer side of the titanium inner container (1), wherein the silica gel ring (5) is fixed below the connecting ring (4);
s10, pumping out inner layer vacuum layer gas from a gap between the titanium inner container (1) and the stainless steel middle layer (2) by using a second mold (7), pushing the titanium inner container (1) inwards to enable the opening of the titanium inner container (1) to be flush with the opening of the stainless steel outer layer (3), and forming an inner heat preservation space (24) by the titanium inner container (1) and the stainless steel middle layer (2) through the silica gel ring (5);
s11, heating the middle-layer getter (21) by using a second die (7), activating the middle-layer getter (21), and taking out a product to cool to room temperature;
and S12, welding the stainless steel part on the outer side of the connecting ring (4) with the stainless steel outer layer (3).
2. The manufacturing method of the vacuum heat-preservation container made of stainless steel with the inside titanium and the outside according to claim 1, characterized in that: in step S6, the heating after the product is put into the vacuum oven includes the steps of:
s6.1: heating to 200 ℃ in 10 minutes, and keeping the constant temperature for 10 minutes;
s6.2: heating to 320 ℃ in 10 minutes, and keeping the constant temperature for 25 minutes;
s6.3: raising the temperature to 460-480 ℃ in 15 minutes, and keeping the constant temperature for 45-55 minutes;
s6.4: raising the temperature to 520-540 ℃ in 20 minutes, and keeping the constant temperature for 60-90 minutes.
3. The manufacturing method of the vacuum heat-preservation container with the titanium inside and the stainless steel outside according to claim 1, characterized in that: the step of manufacturing the connection ring (4) in step S7 includes the steps of:
s7.1, taking the steel-titanium composite plate and dividing the steel-titanium composite plate into coil materials with the width of 157 mm;
s7.2, bending the coil stock obtained in the step S7.1, wherein the inner side of the coil stock is made of titanium, and the outer side of the coil stock is made of stainless steel;
s7.3, welding the product obtained in the step S7.2 to form a circular tube;
and S7.4, cutting the round pipe to manufacture the connecting ring (4).
4. The method for manufacturing the vacuum heat-insulating container with the inner titanium and the outer stainless steel according to claim 3, wherein the method comprises the following steps: the inner diameter of the connecting ring (4) is D1, the outer diameter of the connecting ring (4) is D2, the outer diameter of the cup opening of the titanium inner container (1) is W1, the inner diameter of the cup opening of the stainless steel outer layer (3) is W2, and the connecting ring (4), the titanium inner container (1) and the stainless steel outer layer (3) meet the following conditions: w1 ═ D1+ (3-6) mm, and D2 ═ W2+ (3-6) mm.
5. The manufacturing method of the vacuum heat-preservation container made of stainless steel with the inside titanium and the outside according to claim 4, characterized in that: the lower part of the connecting ring (4) is provided with an inner cambered surface (41) and an outer cambered surface (42).
6. The manufacturing method of the vacuum heat-preservation container made of stainless steel with the inside titanium and the outside according to claim 5, characterized in that: the height difference between the mouth parts of the stainless steel outer layer (3) and the stainless steel middle layer (2) is H1, the range of H1 is 3-7 mm, the length of the connecting ring (4) in the step S7 is H2, and the range of H2 is 2-6 mm.
7. The manufacturing method of the vacuum heat-preservation container with the titanium inside and the stainless steel outside according to claim 1, characterized in that: the middle layer getter (21) and the outer layer getter (32) are non-evaporable getters.
8. The manufacturing method of the vacuum heat-preservation container made of stainless steel with the inside titanium and the outside according to claim 1, characterized in that: the outer side surface of the silica gel ring (5) is provided with two rings of flanges (51), and the two flanges (51) are abutted to the stainless steel middle layer (2).
9. The manufacturing method of the vacuum heat-preservation container with the titanium inside and the stainless steel outside according to claim 1, characterized in that: in the step S11, the fixing cover (22) is heated by high frequency heating to heat the middle getter (21).
10. The manufacturing method of the vacuum heat-preservation container with the titanium inside and the stainless steel outside according to claim 1, characterized in that: the fixing cover (22) is made of stainless iron.
11. The manufacturing method of the vacuum heat-preservation container with the titanium inside and the stainless steel outside according to claim 1, characterized in that: in the step S8, the first mold (6) comprises a mold bracket assembly (61), a first movable assembly (62), a second movable assembly (63), a positioning sleeve (64), an inner positioning assembly (65) and a deformation member (66),
the die support assembly (61) comprises an upper template (611), a middle template (612) and a lower template (613), the upper template (611) is fixedly connected with the middle template (612) through a column, the middle template (612) is fixedly connected with the lower template (613) through a column,
the first movable assembly (62) comprises a first air cylinder (621), a top bar (622) and a reset template (623), the first air cylinder (621) is fixed on the lower template (613), the top bar (622) penetrates through the middle template (612) to be connected with the reset template (623),
the second movable assembly (63) comprises a second air cylinder (631), a connecting piece (632), a pull rod (633) and a pull head (634), the second air cylinder (631) is fixed on the middle template (612), the top of the second air cylinder (631) is connected with the bottom of the connecting piece (632), the top of the connecting piece (632) is connected with the bottom of the pull rod (633), the top of the pull rod (633) is connected with the pull head (634),
a positioning sleeve step (641) for arranging the connecting ring (4) is arranged on the positioning sleeve (64), the positioning sleeve (64) is fixedly connected with the die bracket component (61),
the center of the reset template (623) is opened, the edge of the opening is upwards protruded, the central upwards protruded part of the reset template (623) extends into the opening at the center of the upper template (611) and the top of the reset template (623) is connected with the inner positioning component (65),
the upper side of the deformation piece (66) is connected with the pull head (634) and the lower side of the deformation piece (66) is connected with the upper end of the inner positioning component (65),
the pull head (634) moves downwards under the driving of the second cylinder (631) to extrude a deformation piece (66), the deformation piece (66) protrudes outwards to abut against the inner wall of the titanium liner (1), then the second cylinder (631) continues to drive the pull head (634) to press downwards, the first cylinder (621) drives the reset template (623) to move downwards at the same time until the opening of the titanium liner (1) abuts against the positioning sleeve step (641), and the titanium liner (1) is clamped into the inner side of the connecting ring (4) under the action of the tensile force of the deformation piece (66).
12. The method for manufacturing the vacuum heat-insulating container with the titanium inside and the stainless steel outside according to claim 11, wherein the method comprises the following steps: interior location subassembly (65) are provided with interior location inclined plane (651), interior location supporting part (652), pull head (634) are provided with pull head inclined plane (6341), pull head ring platform (6342) downside with deformation piece (66) upside offsets, interior location subassembly (65) have deformability, pull head (634) move down and extrude deformation piece (66) under the drive of second cylinder (631) and make it with titanium inner bag (1) inner wall offsets, simultaneously the inclined plane extrusion of pull head (634) is interior to be fixed inclined plane (651) and is made interior location supporting part (652) outwards prop titanium inner bag (1) oral area.
13. The method for manufacturing the vacuum heat-insulating container with the titanium inside and the stainless steel outside according to claim 11, wherein the method comprises the following steps: a second die (7) in the step S10 comprises a lower pressing head (71), a lower pressing ejector rod (72), a fixed lower die (73), a pressing plate (74), a shell placing support (75), a telescopic piece (76), a vacuum pump (77) and a heater (79), wherein the fixed lower die (73) is provided with a cup body fixing part (731), the cup body fixing part (731) is provided with a first sealing piece (732), a stainless steel outer layer (3) abuts against the first sealing piece (732) when being placed into the fixed lower die (73), the lower pressing ejector rod (72) penetrates through the cup body fixing part (731) to be connected with the pressing plate (74), a second sealing piece (733) is arranged between the lower pressing ejector rod (72) and the cup body fixing part (731), and the fixed lower die (73) forms an air extracting space (78) inside by means of the first sealing piece (732) and the second sealing piece (733), the telescopic piece (76) is arranged at the bottom of the air extracting space (78), the shell mounting support (75) is arranged on the telescopic piece (76), the pressing plate (74) is connected with the shell mounting support (75), the telescopic piece (76), the shell mounting support (75), the pressing plate (74) and the pressing ejector rod (72) form a preparation position and a pressing position under the matching of the pressing head (71), the fixed lower die (73) is provided with an exhaust passage (734) at the bottom of the inner side of the air extracting space (78), and the exhaust passage (734) is communicated with the air extracting space (78) and the vacuum pump (77),
placing the semi-finished product obtained in the step S9 into a second mold with the mouth facing downwards, wherein the stainless steel outer layer (3) is abutted against the first sealing member (732) and is separated from the mouth of the titanium inner container (1) by the aid of the outer shell mounting support (75), starting a vacuum pump (77) to pump gas out of the pumping space (78) through an exhaust channel (734), in the ready position, the housing seating bracket (75) separates the mouth of the stainless steel outer layer (3) from the mouth of the titanium inner container (1), when in the pressing position, the lower pressing head (71) presses the stainless steel outer layer (3) and the lower pressing ejector rod (72) downwards so that the opening part of the stainless steel outer layer (3) is connected with the connecting ring (4), when the pressing position is reached, the pressing ejector rod (72) drives the pressing plate (74) to apply force to the shell mounting support (75), so that the shell mounting support (75) extrudes the telescopic piece (76) and then moves downwards.
14. The method for manufacturing the vacuum heat-insulating container with the titanium inside and the stainless steel outside according to claim 13, wherein the method comprises the following steps: the fixed lower die (73) is provided with an exhaust groove (735) at the bottom of the inner side of the air exhaust space (78), and the exhaust groove (735) is communicated with the exhaust channel (734).
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