CN109321721A - A kind of the normalizing processing method and hoisting tool of flat bottom cover - Google Patents
A kind of the normalizing processing method and hoisting tool of flat bottom cover Download PDFInfo
- Publication number
- CN109321721A CN109321721A CN201811114875.9A CN201811114875A CN109321721A CN 109321721 A CN109321721 A CN 109321721A CN 201811114875 A CN201811114875 A CN 201811114875A CN 109321721 A CN109321721 A CN 109321721A
- Authority
- CN
- China
- Prior art keywords
- bottom cover
- flat bottom
- gusset
- plate
- normalizing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/28—Normalising
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/22—Rigid members, e.g. L-shaped members, with parts engaging the under surface of the loads; Crane hooks
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The present invention relates to the normalizing processing methods and hoisting tool of a kind of flat bottom cover, include gusset, bottom plate and lifting lug, offer equally distributed heat release hole on bottom plate, adjacent heat radiation hole is separated by gusset；Gusset is weldingly fixed on bottom plate, and boss has been uniformly arranged on gusset, has formed heat dissipation channel between adjacent lands；Lifting lug is in the shape of " pin " to be fixed on bottom edge, and the outside of lifting lug has " R " font lifting hole(eyelet) slot；Its method and step includes the pre- groove-Fixture Design-normalizing-test-groove-inspection of selection-scribing line-blanking-amendment-cold spinning-.Only tooling need to be welded by figure in processing method of the invention, remaining routinely normalizing heat treatment operation, lower to the technical requirements of operator, reduce amendment of the later period to flat bottom cover, and production efficiency improves 60%.
Description
Technical field
The present invention relates to the manufacturing process of end socket, in particular to the normalizing processing method and lifting work of a kind of flat bottom cover
Dress.
Background technique
Since the Structure Comparison of flat bottom cover is oval or dished (torispherical) head, structural constraint intensity is lower, so flat at present
End socket is not heat-treated generally, only does 625 DEG C of annealing heat treatment.The flat bottom cover used on heat exchangers, due to work
Make situation limitation, flat bottom cover needs normalizing, thoroughly eliminates machining stress.Heat treatment operation routinely, flat bottom cover is flat
After putting state normalizing heat treatment, flat bottom cover torsional deformation and bottom are collapsed.Currently, country's Q245R class low-alloy steel, product is just
After fire, since heat treatment condition and steel mill are variant, material property testing is easily unqualified, therefore requires the cooling of heat treatment
It is higher.
Summary of the invention
The purpose of the present invention is overcoming defect of the existing technology, a kind of couple of operator is provided and requires low, scrappage
The normalizing processing method and hoisting tool of flat bottom cover low, high in machining efficiency.
Realizing the technical solution of the object of the invention is: a kind of normalizing processing hoisting tool of flat bottom cover, comprising gusset,
Bottom plate and lifting lug offer equally distributed heat release hole on the bottom plate；Adjacent heat radiation hole is by being mutually perpendicular to laterally and vertically
The gusset of setting separates；The gusset is weldingly fixed on bottom plate, and gusset height is lower than high 1~2mm in flat bottom cover, on gusset
It is uniformly arranged the boss for being used to support the bottom of flat bottom cover, forms heat dissipation channel between adjacent lands；The lifting lug is in
Triangle disposition is fixed on bottom edge, and the outside of lifting lug has " R " font lifting hole(eyelet) slot.
It is welded between gusset and bottom plate described in above-mentioned technical proposal by fillet welding.
There are bottom edge described in above-mentioned technical proposal two pieces of test plate (panel)s disposed in parallel to place support plate.
A kind of normalizing processing method of flat bottom cover, comprising the following steps:
S001 selection: low-alloy steel Q245R；
S002 scribing line: it is required to mark circle on plate according to process, the foundation as blank size；
S003 blanking: Numerical control cutting is carried out to plate, forms disk；
S004 amendment: checking the flatness of disk, be modified with 2000T press, and Planeness value is controlled in≤3mm；
S005 cold spinning: cold spinning is carried out to disk by loading mold on spinning machine, the spinning mold includes pressure
Wheels and forming wheel, disk is due to pressure wheel and shapes the rotary squeezing effect of wheel and tentatively becomes flat bottom cover, shapes wheel
Mold R value is 0.92 times of flat bottom cover R, checks end socket section configuration with template；
The pre- groove of S006: adjusting the eccentric situation of end socket before pre- groove, in the R part inspection of spinning, eccentricity value control exists
In≤2mm；Pre- groove is carried out to flat bottom cover, port is flushed, the surplus 30mm of secondary groove is reserved, guarantees the flat of port surface
Face degree≤2mm；
S007 Fixture Design: flat bottom cover is buckled to, and welded corner joint is welded in tooling, for fixing and lifting by crane end socket；
S008 normalizing: end socket and tooling are put into furnace, connect thermocouple；Normalizing heat treatment is carried out, by tooling after heat preservation
Lower table is hung, is cooled down；
S009 test: it will be machined out sampling with the base material test plate (panel) of furnace normalizing with flat bottom cover, stretches, is bent and rushes
Hit test；
S010 groove: secondary groove is carried out to flat bottom cover, guarantees the depth of parallelism of port and bottom；
S011 is checked: being measured the depth of parallelism of flat bottom cover bottom plane degree, bottom and port, is measured outer perimeter, plate thickness, mistake
Circularity meets technique requirement.
In tooling in step S007 described in above-mentioned technical proposal, carbon steel of the gusset with a thickness of 24mm, gusset height
Lower than 1~2mm high in end socket, boss and heat dissipation channel are provided on gusset, boss is effectively supported flat by 400 × 400 distributions
The bottom of end socket；Bottom plate selects plate thickness for the carbon steel of 40mm, by the position of boss, heat release hole is opened on bottom plate, diameter is
250mm, gusset are weldingly fixed on bottom plate；Flat bottom cover is tipped upside down on bottom plate and is placed, a circle and bottom plate fillet welding outside port
It is welded；Fillet weld can increase structural strength of the tooling at 900 DEG C.
In step S008 described in above-mentioned technical proposal, by 900 DEG C of normalizings, heat preservation comes out and cools down after 30 minutes, and tooling is at 5 points
Lower table is hung in clock, is carried out quickly air-cooled.
After adopting the above technical scheme, the present invention have the effect of it is following positive:
(1) early period of the invention controls shape by spinning manufacture, designs matched normalizing tooling, is heat-treated by normalizing
Afterwards, the shape of flat bottom cover is still intact, and material property is restored, and the bottom of flat bottom cover is smooth, and flatness holding≤
3mm, end socket and straight tube circle section group are avoided and are organized by force pair because gap is big to gap≤3mm.
(2) only tooling need to be welded by figure in processing method of the invention, remaining routinely normalizing heat treatment operation, right
The technical requirements of operator are lower, reduce amendment of the later period to flat bottom cover, and production efficiency improves 60%.
Detailed description of the invention
In order that the present invention can be more clearly and readily understood, right below according to specific embodiment and in conjunction with attached drawing
The present invention is described in further detail, wherein
Fig. 1 is a kind of flow chart of the processing method of flat bottom cover of the invention；
Fig. 2 is the normalizing tool structure main view of the flat bottom cover of processing method of the invention；
Fig. 3 is the normalizing tool structure top view of the flat bottom cover of processing method of the invention；
Fig. 4 is the normalizing tool structure three-dimensional view of the flat bottom cover of processing method of the invention.
Fig. 5 is the state for finally needing to process.
Specific embodiment
(embodiment 1, a kind of normalizing processing hoisting tool of flat bottom cover)
See Fig. 2 to Fig. 4, the present invention includes gusset 1, bottom plate 2 and lifting lug 3, and equally distributed dissipate is offered on the bottom plate 2
Hot hole 4；Adjacent heat radiation hole 4 is separated by the gusset 1 being arranged in a mutually vertical manner laterally and vertically；The gusset 1 is weldingly fixed on bottom
On plate 2,1 height of gusset is lower than high 1~2mm in flat bottom cover, is uniformly arranged the bottom for being used to support flat bottom cover 8 on gusset 1
The boss 5 in portion forms heat dissipation channel 6 between adjacent lands 5；The lifting lug 3 is in the shape of " pin " to be fixed on 2 edge of bottom plate, lifting lug 3
Outside have " R " font lifting hole(eyelet) slot 9.
It is welded between gusset 1 and bottom plate 2 by fillet welding.
There are two pieces of test plate (panel)s 7 disposed in parallel to place support plate at bottom plate 2 edge.
(embodiment 2, a kind of normalizing processing method of flat bottom cover)
See Fig. 1 and Fig. 5, a kind of normalizing processing method of flat bottom cover, comprising the following steps:
S001 selection: low-alloy steel Q245R；
S002 scribing line: it is required to mark circle on plate according to process, the foundation as blank size；
S003 blanking: Numerical control cutting is carried out to plate, forms disk；
S004 amendment: checking the flatness of disk, be modified with 2000T press, and Planeness value is controlled in≤3mm；
S005 cold spinning: cold spinning is carried out to disk by loading mold on spinning machine, the spinning mold includes pressure
Wheels and forming wheel, disk is due to pressure wheel and shapes the rotary squeezing effect of wheel and tentatively becomes flat bottom cover, shapes wheel
Mold R value is 0.92 times of flat bottom cover R, checks end socket section configuration with template；
The pre- groove of S006: adjusting the eccentric situation of end socket before pre- groove, in the R part inspection of spinning, eccentricity value control exists
In≤2mm；Pre- groove is carried out to flat bottom cover, port is flushed, the surplus 30mm of secondary groove is reserved, guarantees the flat of port surface
Face degree≤2mm；
S007 Fixture Design: flat bottom cover is buckled to, and welded corner joint is welded in tooling, for fixing and lifting by crane end socket；
S008 normalizing: end socket and tooling are put into furnace, connect thermocouple；Normalizing heat treatment is carried out, by tooling after heat preservation
Lower table is hung, is cooled down；
S009 test: sampling will be machined out with the base material test plate (panel) 7 of furnace normalizing with flat bottom cover, stretch, be bent and
Impact test；Test result is suitable with raw material, all meets the requirements of the standard.
S010 groove: secondary groove is carried out to flat bottom cover, guarantees the depth of parallelism of port and bottom；
S011 is checked: being measured the depth of parallelism of flat bottom cover bottom plane degree, bottom and port, is measured outer perimeter, plate thickness, mistake
Circularity meets technique requirement.
In tooling in step S007, carbon steel of the gusset 1 with a thickness of 24mm, 1 height of gusset is high by 1 lower than in end socket~
2mm, boss 5 and heat dissipation channel 6 are provided on gusset 1, and boss 5 effectively supports the bottom of flat bottom cover by 400 × 400 distributions；
Bottom plate 2 selects plate thickness for the carbon steel of 40mm, by the position of boss 5, opens heat release hole 4, diameter 250mm, gusset on a base plate 2
1 is welded and fixed on a base plate 2；Flat bottom cover back-off is placed on a base plate 2, and a circle and bottom plate 2 are welded with fillet welding outside port；
Fillet weld 10 can increase structural strength of the tooling at 900 DEG C.
In step S008, by 900 DEG C of normalizings, heat preservation comes out and cools down after 30 minutes, and tooling hangs lower table in 5 minutes, into
Row is quickly air-cooled.
Particular embodiments described above has carried out further in detail the purpose of the present invention, technical scheme and beneficial effects
It describes in detail bright, it should be understood that the above is only a specific embodiment of the present invention, is not intended to restrict the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution, improvement and etc. done should be included in guarantor of the invention
Within the scope of shield.
Claims (6)
1. a kind of normalizing processing hoisting tool of flat bottom cover, it is characterised in that: include gusset, bottom plate and lifting lug, the bottom
Equally distributed heat release hole is offered on plate, adjacent heat radiation hole is separated by the gusset being arranged in a mutually vertical manner laterally and vertically；Institute
It states gusset to be weldingly fixed on bottom plate, gusset height is lower than high 1~2mm in flat bottom cover, has been uniformly arranged on gusset for branch
The boss of the bottom of flat bottom cover is supportted, forms heat dissipation channel between adjacent lands；The lifting lug is in the shape of " pin " to be fixed on bottom plate
The outside at edge, lifting lug has " R " font lifting hole(eyelet) slot.
2. the normalizing processing hoisting tool of flat bottom cover according to claim 1, it is characterised in that: the gusset and bottom
It is welded between plate by fillet welding.
3. the normalizing processing hoisting tool of flat bottom cover according to claim 1 or 2, it is characterised in that: the bottom plate
There are two pieces of test plate (panel)s disposed in parallel to place support plate at edge.
4. a kind of normalizing processing method of the flat bottom cover using tooling described in claim 1, which is characterized in that including following
Step:
S001 selection: low-alloy steel Q245R；
S002 scribing line: it is required to mark circle on plate according to process, the foundation as blank size；
S003 blanking: Numerical control cutting is carried out to plate, forms disk；
S004 amendment: checking the flatness of disk, be modified with 2000T press, and Planeness value is controlled in≤3mm；
S005 cold spinning: cold spinning is carried out to disk by loading mold on spinning machine, the spinning mold includes pressure wheel
It is taken turns with forming, disk is due to pressure wheel and shapes the rotary squeezing effect of wheel and tentatively becomes flat bottom cover, shapes the mold R of wheel
Value is 0.92 times of flat bottom cover R, checks end socket section configuration with template；
The pre- groove of S006: adjusting the eccentric situation of end socket before pre- groove, in the R part inspection of spinning, eccentricity value is controlled in≤2mm
It is interior；Pre- groove is carried out to flat bottom cover, port is flushed, the surplus 30mm of secondary groove is reserved, guarantees the flatness of port surface
≤2mm；
S007 Fixture Design: flat bottom cover is buckled to, and welded corner joint is welded in tooling, for fixing and lifting by crane end socket；
S008 normalizing: end socket and tooling are put into furnace, connect thermocouple；Normalizing heat treatment is carried out, hangs down tooling after heat preservation
Table is cooled down；
S009 test: it will be machined out sampling with the base material test plate (panel) of furnace normalizing with flat bottom cover, stretches, is bent and impacts examination
It tests；
S010 groove: secondary groove is carried out to flat bottom cover, guarantees the depth of parallelism of port and bottom；
S011 is checked: measuring the depth of parallelism of flat bottom cover bottom plane degree, bottom and port, measurement outer perimeter, loses circle at plate thickness
Degree meets technique requirement.
5. a kind of normalizing processing method of flat bottom cover according to claim 4, it is characterised in that: in the step S007
Tooling in, carbon steel of the gusset with a thickness of 24mm, gusset height is provided with boss on gusset lower than high 1~2mm in end socket
And heat dissipation channel, boss effectively support the bottom of flat bottom cover by 400 × 400 distributions；Bottom plate selects plate thickness for the carbon of 40mm
Steel opens heat release hole, diameter 250mm by the position of boss on bottom plate, and gusset is weldingly fixed on bottom plate；Flat bottom cover falls
It is buckled on bottom plate and places, a circle and bottom plate are welded with fillet welding outside port；Fillet weld can increase knot of the tooling at 900 DEG C
Structure intensity.
6. a kind of normalizing processing method of flat bottom cover according to claim 4, it is characterised in that: the step S008
In, by 900 DEG C of normalizings, heat preservation comes out and cools down after 30 minutes, and tooling hangs lower table in 5 minutes, carries out quickly air-cooled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811114875.9A CN109321721B (en) | 2018-09-25 | 2018-09-25 | Normalizing processing method and hoisting tool for flat-bottom end socket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811114875.9A CN109321721B (en) | 2018-09-25 | 2018-09-25 | Normalizing processing method and hoisting tool for flat-bottom end socket |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109321721A true CN109321721A (en) | 2019-02-12 |
| CN109321721B CN109321721B (en) | 2020-05-22 |
Family
ID=65266439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811114875.9A Active CN109321721B (en) | 2018-09-25 | 2018-09-25 | Normalizing processing method and hoisting tool for flat-bottom end socket |
Country Status (1)
| Country | Link |
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| CN (1) | CN109321721B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110369964A (en) * | 2019-08-08 | 2019-10-25 | 无锡庆新封头制造有限公司 | Hole flanging seal head molding method |
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|---|---|---|---|---|
| GB924117A (en) * | 1956-07-13 | 1963-04-24 | Reinhold Engineering & Plastic | An improved pressure vessel and method of making same |
| JPS62240718A (en) * | 1986-04-10 | 1987-10-21 | Hitachi Ltd | Local annealing method for large-scaled pressure vessel |
| KR101114106B1 (en) * | 2004-12-08 | 2012-02-21 | 현대중공업 주식회사 | A jig for prevention of quenching distortion of the head plate |
| CN202938015U (en) * | 2012-11-23 | 2013-05-15 | 江苏深绿新能源科技有限公司 | Flat bottom seal head supporting assembly |
| CN203269988U (en) * | 2013-04-25 | 2013-11-06 | 甘肃蓝科石化高新装备股份有限公司 | Ellipsoidal head heat treatment deformation preventing fixture |
| CN104152658A (en) * | 2014-07-16 | 2014-11-19 | 江苏昆仲机械有限公司 | Heat treatment method of cold forming end socket |
| CN105666067A (en) * | 2016-04-11 | 2016-06-15 | 常州旷达威德机械有限公司 | Machining method for trepanning shell cover |
| CN205420487U (en) * | 2016-03-24 | 2016-08-03 | 安徽心连心重型封头有限公司 | Heat treatment deformation frock is prevented to ellipsoidal head |
| CN205420488U (en) * | 2016-03-24 | 2016-08-03 | 安徽心连心重型封头有限公司 | Spherical head thermal treatment fixes frock |
| CN206477014U (en) * | 2016-12-08 | 2017-09-08 | 江西新裕隆汽车零部件有限公司 | A kind of end socket heat treatment tooling |
-
2018
- 2018-09-25 CN CN201811114875.9A patent/CN109321721B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB924117A (en) * | 1956-07-13 | 1963-04-24 | Reinhold Engineering & Plastic | An improved pressure vessel and method of making same |
| JPS62240718A (en) * | 1986-04-10 | 1987-10-21 | Hitachi Ltd | Local annealing method for large-scaled pressure vessel |
| KR101114106B1 (en) * | 2004-12-08 | 2012-02-21 | 현대중공업 주식회사 | A jig for prevention of quenching distortion of the head plate |
| CN202938015U (en) * | 2012-11-23 | 2013-05-15 | 江苏深绿新能源科技有限公司 | Flat bottom seal head supporting assembly |
| CN203269988U (en) * | 2013-04-25 | 2013-11-06 | 甘肃蓝科石化高新装备股份有限公司 | Ellipsoidal head heat treatment deformation preventing fixture |
| CN104152658A (en) * | 2014-07-16 | 2014-11-19 | 江苏昆仲机械有限公司 | Heat treatment method of cold forming end socket |
| CN205420487U (en) * | 2016-03-24 | 2016-08-03 | 安徽心连心重型封头有限公司 | Heat treatment deformation frock is prevented to ellipsoidal head |
| CN205420488U (en) * | 2016-03-24 | 2016-08-03 | 安徽心连心重型封头有限公司 | Spherical head thermal treatment fixes frock |
| CN105666067A (en) * | 2016-04-11 | 2016-06-15 | 常州旷达威德机械有限公司 | Machining method for trepanning shell cover |
| CN206477014U (en) * | 2016-12-08 | 2017-09-08 | 江西新裕隆汽车零部件有限公司 | A kind of end socket heat treatment tooling |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110369964A (en) * | 2019-08-08 | 2019-10-25 | 无锡庆新封头制造有限公司 | Hole flanging seal head molding method |
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| CN109321721B (en) | 2020-05-22 |
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