CN109604494A - A kind of forging method of ultra-large type sheepshead forging - Google Patents
A kind of forging method of ultra-large type sheepshead forging Download PDFInfo
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- CN109604494A CN109604494A CN201910037026.6A CN201910037026A CN109604494A CN 109604494 A CN109604494 A CN 109604494A CN 201910037026 A CN201910037026 A CN 201910037026A CN 109604494 A CN109604494 A CN 109604494A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/08—Upsetting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/10—Piercing billets
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- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention discloses a kind of forging methods of ultra-large type sheepshead forging, are related to technical field of forging, it is intended to which sheepshead forging poor mechanical property, the service life for solving the problems, such as that existing sheepshead forging method forges are low.Its key points of the technical solution are that, comprising: a. sorting blanking；B. blocking is heated；C. punching forms.Wherein, sorting blanking includes that sorting, processing blank and blank are energized；Heating blocking includes first stage heating, the heating of first one-step forming, second stage and blocker forging；Punching molding includes phase III heating and forging molding.Pass through a series of forging step, the problem of very big grain for improving the ultra-large type sheepshead forging crystalline substance obtained using traditional forging method is coarse, Tissue distribution is uneven, shrinkage porosite, stomata, has the effect of that the mechanical property of forging products and service life can be effectively improved.
Description
Technical field
The present invention relates to technical field of forging, more particularly, to a kind of forging method of ultra-large type sheepshead forging.
Background technique
Deform metal between supporting iron or in forging die using impact force or pressure, thus the forging of shape and size needed for obtaining
Part, this kind of process are known as forging.Forging is one of important forming method of metal parts, it is ensured that metal parts has
Preferable mechanical property, to meet requirement.
It is more than 50Kg, forging of the contour dimension in 500mm or more that band large-scale metal forging, which generally refers to forge weight,.With
Existing machinery equipment continuously improve with structure design integration, weight occur is more than 500Kg, and contour dimension exists
The ultra-large type forging of 2000mm or more.Sheepshead forging as weight is more than 500Kg is exactly one of all kinds of ultra-large type forging,
Currently, existing forging manufacturer also has devised some forging methods for this ultra-large type sheepshead forging.Such as:
The Chinese patent of Publication No. CN105903871A discloses a kind of forging method of sheepshead comprising following steps:
1) sorting blanking removes blank end to end, then carries out blanking；2) it heating, a stove is provided, charging temperature is not higher than 1000 DEG C,
Need to keep the temperature two and one-half- hours under furnace temperature reaches initial forging temperature, material Duan Jinlu successively sorts, first in first out；3) upsetting squeeze, blank
The main pressure head spacing upsetting extrusion of adjustment, backhaul when main ram travel reaches setting value after die-filling；4) punching, adjustment formed punch spacing is extremely
Suitable position piercing and shaping die, backhaul when stroke reaches setting value；5) cooling, forging final forging temperature is not less than 800 DEG C, and is placed in
Slow cooling in sand pit.
But prior art among the above have the following deficiencies: due to final forging be by a upsetting squeeze and
What the method for one-off hole-piercing obtained, the forging method of forging is simpler and cruder, and will lead to molding forging, there are coarse grains, tissue
Be unevenly distributed, shrinkage porosite, stomata the problems such as so that the poor mechanical property of forging products, service life are low.
Summary of the invention
The object of the present invention is to provide a kind of forging methods of ultra-large type sheepshead forging, and forging can be effectively improved by having
The mechanical property of product and the effect of service life.
Foregoing invention purpose of the invention has the technical scheme that
A kind of forging method of ultra-large type sheepshead forging, comprising the following steps:
A. sorting blanking:
S10, sorting: suitable blank is chosen, the blank is in rodlike；
S20, processing blank: along the head and tail portion of the radially removed blank of blank；
S30, blank are energized: being preheated by heat-treatment furnace to blank, and carried out repeatedly to the blank for reaching initial forging temperature
Jumping-up and pulling finally obtain one and energize blank；
B. blocking is heated:
S40, first stage heating: blank is assigned into getable blank of energizing and is reheated to initial forging temperature and keeps the temperature H ~ I hours；
S50, first one-step forming: the blank of energizing after the first stage is heated is carried out just on drop press using preliminary molding die
One-step forming obtains the preliminary blank cooperated with Preform Die；
S60, second stage heating: the preliminary blank that first one-step forming is obtained is reheated to initial forging temperature and keeps the temperature J ~ K hours；
S70, blocker forging: the preliminary blank after second stage is heated is swaged on drop press using Preform Die in advance
Type obtains the blocking blank cooperated with finish-forging die；
C. punching forms:
S80, phase III heating: the blocking blank that blocker forging obtains is reheated to initial forging temperature and keeps the temperature L ~ M hours；
S90, forging molding: blocking blank after the phase III is heated on drop press using finish-forging die carry out finish-forging at
Type simultaneously passes through formed punch in the suitable position punching of blocking blank, obtains a forging for meeting design requirement.
By using above-mentioned technical proposal, changed repeatedly in sorting blanking step by the processing of blank and energizing for blank
Become blank each site area, make blank inside be not in relatively large distance Plastic Flow, so as to improve the modeling of metal
Property, conducive to the inherent quality and mechanical property for improving forging, it is allowed to not easy to crack.In heating blocking, by first one-step forming and in advance
Forging molding not only further improves the plasticity of metal, but also finally formed blocking blank can be preferable with finish-forging die
Cooperation, to further improve the quality of the molding forging of punching.On the other hand, the stage is energized repeatedly by blank
The heating of preheating and three phases, can enable blank be always maintained at higher temperature in each forging link, to reduce forging
The resistance of deformation of metal reduces tonnage and the loss of required metal forming machinery.
The present invention is further arranged to: step S20 specifically includes the following steps:
S21, it goes end to end: along the head and tail portion of the radial excision blank of blank by way of machining；
S22, deprotection layer: the protective layer and/or oxide layer on blank lateral wall are ground off by way of machining.
By using above-mentioned technical proposal, can remove blank surface protective layer and established oxide layer, and make base
Any surface finish of material, so that blank, during forging, blank is not likely to produce oxidation, decarburization and scaling loss.
The present invention is further arranged to: the jumping-up of blank and pulling at least carry out three times, every time to blank in step S30
It carries out jumping-up or melts down blank after pulling out to be reheated to initial forging temperature.
By using above-mentioned technical proposal, progress jumping-up or pulling are further taken out after blank is melted down heating each time, is all
The process of the further inherent quality for improving blank and mechanical property, enables to the better quality of finally formed forging,
The service life is longer.
The present invention is further arranged to: the radical length for blank of energizing obtained in step S30, which is greater than in step S90, to be obtained
Forging radical length.
It is that there are certain surpluses for the deformation of blank, conducive to making to energize, blank is final by using above-mentioned technical proposal
It is deformed into the forging form for meeting design requirement.
The present invention is further arranged to: step S40 specifically includes the following steps:
S41, the preheating of first stage press: being divided into two sections for the preheating of drop press, and first segment is the preheating of preliminary molding die,
Second segment is the preheating of bonding press, and wherein the temperature of first segment preheating is 200 ~ 260 degree, the temperature of second segment preheating for 180 ~
240 degree；
S42, first stage blank heating: blank is assigned into getable blank of energizing and is reheated to initial forging temperature and keeps the temperature H ~ I
Hour, wherein initial forging temperature is 1050 ~ 1200 degree.
By using above-mentioned technical proposal, preliminary molding die and bonding press are carried out before preliminary forming step pre-
The step of heat, the reduction speed that can slow down blank own temperature (can effectively slow down the first one-step forming very low by temperature
The speed that mold and press transfer away heat) so that blank be not easy in first one-step forming due to temperature is low but by larger pressure
Power and lead to the problem of fragmentation, forging quality has been effectively ensured.
The present invention is further arranged to: step S60 specifically includes the following steps:
S61, the preheating of second stage press: being divided into two sections for the preheating of drop press, and first segment is the preheating of Preform Die, and second
Section is the preheating of bonding press, and wherein the temperature of first segment preheating is 240 ~ 300 degree, and the temperature of second segment preheating is 220 ~ 280
Degree；
S62, second stage blank heating: the preliminary blank that first one-step forming is obtained is reheated to initial forging temperature and keeps the temperature J ~ K
Hour, wherein initial forging temperature is 1050 ~ 1200 degree.
By using above-mentioned technical proposal, with before first one-step forming preheating and heating it is similar, blank can be slowed down in blocking
The reduction speed of own temperature, further ensure that the quality of the forging of final molding when molding.
The present invention is further arranged to: step S80 specifically includes the following steps:
S81, the preheating of phase III press: being divided into three sections for the preheating of drop press, and first segment is the preheating of finish-forging die, and second
Section is the preheating of bonding press, and third section is the preheating of formed punch, and wherein the temperature of first segment preheating is 300 ~ 500 degree, second segment
The temperature of preheating is 260 ~ 360 degree, and the temperature of third section preheating is 500 ~ 600 degree；
S82, phase III blank heating: the blocking blank that blocker forging obtains is reheated to initial forging temperature and keeps the temperature L ~ M
Hour, wherein initial forging temperature is 1050 ~ 1200 degree.
By using above-mentioned technical proposal, the preheating and heating before forming with forging are similar, can slow down blank in forging
The reduction speed of own temperature when molding, at the same also ensure formed punch drilling when stability, further ensure that finally at
The quality of the forging of type.
The present invention is further arranged to: step S90 specifically includes the following steps:
S91, finish forging: blocking blank after the phase III is heated on drop press using finish-forging die carry out finish-forging at
Type obtains a preliminary molding forging；
S92, punching molding: the suitable position by formed punch in preliminary molding forging is punched out, and formed punch reaches in stroke to be set
Backhaul when definite value obtains a forging for meeting design requirement；
S93, cooling and shaping: the forging that punching is formed, which is placed in lime, clinker or sand, carries out Slow cooling, the forging
The thickness that surrounding covers ash is greater than 120mm.
The present invention is further arranged to: the temperature of forging ash charge is greater than 850 degree in step S93.
By using above-mentioned technical proposal, used lime, clinker or sand be it is dry, ash discharge temperature be not higher than 150
Degree.By way of ash cooling, the temperature of the forging of final molding can be made slowly to reduce, be formed conducive to forging inside relatively stable
Structure has greatly reinforced the service life of forging so that finally formed forging can have preferable mechanical property.
The present invention is further arranged to: the process of formed punch punching is divided into three phases, the punching of first stage in step S92
Speed is 0.5 ~ 2mm/s, and the punching speed of second stage is 2 ~ 5mm/s, and the punching speed of phase III is 5 ~ 10mm/s.
By using above-mentioned technical proposal, when initial, forging surface be it is smooth, when first stage punching punching speed compared with
It is low, more precisely and stablize when can make punching, punching forgings position is avoided fracture and scaling-off situation nearby occur, ensure that the
The precision of one stage punching.Second stage and the punching speed of phase III successively slowly increase, and can guarantee punching quality
While, improve the efficiency of punching.
In conclusion advantageous effects of the invention are as follows:
1, three steps are formed by sorting blanking, heating blocking and punching, changes each site area of blank repeatedly, makes blank
Inside be not in relatively large distance Plastic Flow, improve the plasticity of metal, conducive to improve forging inherent quality and power
Learn performance；
2, by blank energize the preheating repeatedly of step, in three phases again by blank heating to initial forging temperature and three
Drop press and corresponding mold are preheated in stage, so that blank is not likely to produce fragmentation or is fallen in three steps
The quality of forging has been effectively ensured in the problem of slag；
3, by the setting of formed punch punching three phases, the stability and accuracy of formed punch punching has been effectively ensured, and then has guaranteed
The quality of the forging of final molding so that the precision of forging is higher more meets initial design requirement.
Detailed description of the invention
Fig. 1 is the flow chart of the forging method of the ultra-large type sheepshead forging shown in the embodiment of the present invention；
Fig. 2 is the flow chart of the forging method of another ultra-large type sheepshead forging shown in the embodiment of the present invention；
Fig. 3 is shown in the embodiment of the present invention for embodying the variation of blank shape in the forging process of ultra-large type sheepshead forging
The flow chart of journey.
In figure, the 10, first blank；20, the second blank；30, third blank；40, the 4th blank；50, final forging.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
Embodiment
It referring to Fig.1, is a kind of forging method of ultra-large type sheepshead forging disclosed by the invention, comprising the following steps:
A. sorting blanking:
S10, sorting: choosing suitable blank, which is in club shaped structure (i.e. cylindric), and is carbon steel.
S20, processing blank: along the head and tail portion of the radially removed blank of blank, become the first blank 10(referring to figure
3).Specifically, the head and tail portion of blank can be removed by way of machining, so that the both ends of blank become smooth,
Eliminate the protective layer and oxide layer at blank both ends.
S30, blank are energized: being preheated, and carried out to the blank for reaching initial forging temperature anti-to blank by heat-treatment furnace
Multiple jumping-up and pulling finally obtains one and energizes blank, i.e., the second blank 20(is referring to Fig. 3).It should be noted that second base
Material 20 in pie (i.e. the radical length of the second blank 20 less than the first blank 10 radical length, but still it is cylindrical).Specifically
, the jumping-up of blank and pulling at least carry out three times in the step, after carrying out jumping-up or pulling to blank every time, by blank
It melts down and keeps the temperature 0.5 ~ 2 hour after being reheated to initial forging temperature, then blank is taken out and carries out jumping-up or pulling.Preferably, the step
The jumping-up of blank has carried out 4 times in rapid, and pulling has carried out 3 times, has finally obtained a radical length and has joined greater than final forging 50(
According to Fig. 3) radical length blank of energizing.
B. blocking is heated:
S40, first stage heating: blank is assigned into getable blank of energizing and is reheated to initial forging temperature and keeps the temperature H ~ I hours.
Specifically, keep the temperature 1 ~ 2 hour after blank heating to initial forging temperature in this step, the initial forging temperature in the present embodiment is 1050 ~
1200 degree.
S50, first one-step forming: after the first stage is heated energize blank on drop press using preliminary molding die into
The first one-step forming of row, obtains the preliminary blank cooperated with Preform Die, i.e. third blank 30(is referring to Fig. 3).Mould in the present embodiment
Forging press is 4000 tons of multi-ram forging machines.
S60, second stage heating: the preliminary blank that first one-step forming is obtained is reheated to initial forging temperature and keeps the temperature J ~ K
Hour.Specifically, keeping the temperature 2 ~ 4 hours after blank heating to initial forging temperature in this step.
S70, blocker forging: the preliminary blank after second stage is heated is carried out on drop press using Preform Die pre-
Forging molding obtains the blocking blank cooperated with finish-forging die, i.e., the 4th blank 40(is referring to Fig. 3).
C. punching forms:
S80, phase III heating: the blocking blank that blocker forging obtains is reheated to initial forging temperature and keeps the temperature L ~ M hours.
Specifically, keeping the temperature 3 ~ 5 hours after blank heating to initial forging temperature in this step.
S90, forging molding: the blocking blank after the phase III is heated is carried out eventually on drop press using finish-forging die
Forging molding simultaneously passes through formed punch in the suitable position punching of blocking blank, obtains a forging for meeting design requirement, i.e., final forging
50(is referring to Fig. 3).
Referring to Fig. 2, step S20 specifically includes the following steps:
S21, it goes end to end: along the head and tail portion of the radial excision blank of blank by way of machining.
S22, deprotection layer: the protective layer and/or oxide layer on blank lateral wall are ground off by way of machining.
Specifically, the head and tail portion of blank can be removed by way of machining, the protective layer on blank lateral wall
And/or oxide layer can be removed by way of grinding.
Referring to Fig. 2, step S40 specifically includes the following steps:
S41, the preheating of first stage press: being divided into two sections for the preheating of drop press, and first segment is the preheating of preliminary molding die,
Second segment is the preheating of the pressure head of drop press, and wherein the temperature of first segment preheating is 200 ~ 260 degree, the temperature of second segment preheating
It is 180 ~ 240 degree.Preferably, preliminary molding die is preheating to 260 degree, the pressure head of drop press is preheating to 240 degree for most
It is good, it is contemplated that temperature heating has an error, generally by preliminary molding die be preheating to 255 degree or so, the pressure head of drop press is pre-
Heat is to entering keeping warm mode, under keeping warm mode, the temperature of the pressure head of preliminary molding die and drop press after 245 degree or so
It will be slowly increased to optimal temperature.
S42, first stage blank heating: blank is assigned into getable blank of energizing and is reheated to initial forging temperature and keeps the temperature
H ~ I hours.
Referring to Fig. 2, step S60 specifically includes the following steps:
S61, the preheating of second stage press: being divided into two sections for the preheating of drop press, and first segment is the preheating of Preform Die, and second
Section is the preheating of the pressure head of drop press, and wherein the temperature of first segment preheating is 240 ~ 300 degree, and the temperature of second segment preheating is
220 ~ 280 degree.Similar with first stage preheating, the pressure head of Preform Die and drop press is eventually raised to most preferably under keeping warm mode
Temperature (optimum temperature of Preform Die is 300 degree, and the optimum temperature of the pressure head of drop press is 280 degree).
S62, second stage blank heating: the preliminary blank that first one-step forming is obtained is reheated to initial forging temperature and keeps the temperature
J ~ K hours.
Referring to Fig. 2, step S80 specifically includes the following steps:
S81, the preheating of phase III press: being divided into three sections for the preheating of drop press, and first segment is the preheating of finish-forging die, and second
Section is the preheating of the pressure head of drop press, and third section is the preheating of formed punch, and wherein the temperature of first segment preheating is 300 ~ 500 degree,
The temperature of second segment preheating is 260 ~ 360 degree, and the temperature of third section preheating is 500 ~ 600 degree.It is similar with second stage preheating, eventually
Forging mould, the pressure head of drop press and formed punch can be eventually raised to the optimum temperature (optimum temperature of finish-forging die under keeping warm mode
It is 500 degree, the optimum temperature of the pressure head of drop press is 360 degree, and the optimum temperature of formed punch is 600 degree).
S82, phase III blank heating: the blocking blank that blocker forging obtains is reheated to initial forging temperature and is kept the temperature
L ~ M hours.
Referring to Fig. 2, step S90 specifically includes the following steps:
S91, finish forging: blocking blank after the phase III is heated on drop press using finish-forging die carry out finish-forging at
Type obtains a preliminary molding forging.
S92, punching molding: the suitable position by formed punch in preliminary molding forging is punched out, and formed punch is reached in stroke
Backhaul when to setting value, obtains the forging for meeting design requirement.Specifically, the process of formed punch punching is divided into three phases,
The punching speed of first stage is 0.5 ~ 2mm/s, and the punching speed of second stage is 2 ~ 5mm/s, the punching speed of phase III
For 5 ~ 10mm/s.
S93, cooling and shaping: the forging that punching is formed, which is placed in lime, clinker or sand, carries out Slow cooling.Tool
Body, the temperature of forging ash charge is greater than 850 degree, and the thickness that ash is covered around forging is greater than 120mm.
The embodiment of present embodiment is presently preferred embodiments of the present invention, not limits protection model of the invention according to this
Enclose, therefore: the equivalence changes that all structures under this invention, shape, principle are done, should all be covered by protection scope of the present invention it
It is interior.
Claims (10)
1. a kind of forging method of ultra-large type sheepshead forging, which comprises the following steps:
A. sorting blanking:
S10, sorting: suitable blank is chosen, the blank is in rodlike；
S20, processing blank: along the head and tail portion of the radially removed blank of blank；
S30, blank are energized: being preheated by heat-treatment furnace to blank, and carried out repeatedly to the blank for reaching initial forging temperature
Jumping-up and pulling finally obtain one and energize blank；
B. blocking is heated:
S40, first stage heating: blank is assigned into getable blank of energizing and is reheated to initial forging temperature and keeps the temperature H ~ I hours；
S50, first one-step forming: the blank of energizing after the first stage is heated is carried out just on drop press using preliminary molding die
One-step forming obtains the preliminary blank cooperated with Preform Die；
S60, second stage heating: the preliminary blank that first one-step forming is obtained is reheated to initial forging temperature and keeps the temperature J ~ K hours；
S70, blocker forging: the preliminary blank after second stage is heated is swaged on drop press using Preform Die in advance
Type obtains the blocking blank cooperated with finish-forging die；
C. punching forms:
S80, phase III heating: the blocking blank that blocker forging obtains is reheated to initial forging temperature and keeps the temperature L ~ M hours；
S90, forging molding: blocking blank after the phase III is heated on drop press using finish-forging die carry out finish-forging at
Type simultaneously passes through formed punch in the suitable position punching of blocking blank, obtains a forging for meeting design requirement.
2. a kind of forging method of ultra-large type sheepshead forging according to claim 1, which is characterized in that step S20 is specific
The following steps are included:
S21, it goes end to end: along the head and tail portion of the radial excision blank of blank by way of machining；
S22, deprotection layer: the protective layer and/or oxide layer on blank lateral wall are ground off by way of machining.
3. a kind of forging method of ultra-large type sheepshead forging according to claim 1, which is characterized in that base in step S30
The jumping-up of material and pulling at least carry out three times, melt down blank to blank progress jumping-up or after pulling out be reheated to every time
Initial forging temperature.
4. a kind of forging method of ultra-large type sheepshead forging according to claim 1, which is characterized in that in step S30
To blank of energizing radical length be greater than step S90 obtained in forging radical length.
5. a kind of forging method of ultra-large type sheepshead forging according to claim 1, which is characterized in that step S40 is specific
The following steps are included:
S41, the preheating of first stage press: being divided into two sections for the preheating of drop press, and first segment is the preheating of preliminary molding die,
Second segment is the preheating of bonding press, and wherein the temperature of first segment preheating is 200 ~ 260 degree, the temperature of second segment preheating for 180 ~
240 degree；
S42, first stage blank heating: blank is assigned into getable blank of energizing and is reheated to initial forging temperature and keeps the temperature H ~ I
Hour, wherein initial forging temperature is 1050 ~ 1200 degree.
6. a kind of forging method of ultra-large type sheepshead forging according to claim 1, which is characterized in that step S60 is specific
The following steps are included:
S61, the preheating of second stage press: being divided into two sections for the preheating of drop press, and first segment is the preheating of Preform Die, and second
Section is the preheating of bonding press, and wherein the temperature of first segment preheating is 240 ~ 300 degree, and the temperature of second segment preheating is 220 ~ 280
Degree；
S62, second stage blank heating: the preliminary blank that first one-step forming is obtained is reheated to initial forging temperature and keeps the temperature J ~ K
Hour, wherein initial forging temperature is 1050 ~ 1200 degree.
7. a kind of forging method of ultra-large type sheepshead forging according to claim 1, which is characterized in that step S80 is specific
The following steps are included:
S81, the preheating of phase III press: being divided into three sections for the preheating of drop press, and first segment is the preheating of finish-forging die, and second
Section is the preheating of bonding press, and third section is the preheating of formed punch, and wherein the temperature of first segment preheating is 300 ~ 500 degree, second segment
The temperature of preheating is 260 ~ 360 degree, and the temperature of third section preheating is 500 ~ 600 degree；
S82, phase III blank heating: the blocking blank that blocker forging obtains is reheated to initial forging temperature and keeps the temperature L ~ M
Hour, wherein initial forging temperature is 1050 ~ 1200 degree.
8. a kind of forging method of ultra-large type sheepshead forging according to claim 1, which is characterized in that step S90 is specific
The following steps are included:
S91, finish forging: blocking blank after the phase III is heated on drop press using finish-forging die carry out finish-forging at
Type obtains a preliminary molding forging；
S92, punching molding: the suitable position by formed punch in preliminary molding forging is punched out, and formed punch reaches in stroke to be set
Backhaul when definite value obtains a forging for meeting design requirement；
S93, cooling and shaping: the forging that punching is formed, which is placed in lime, clinker or sand, carries out Slow cooling, the forging
The thickness that surrounding covers ash is greater than 120mm.
9. a kind of forging method of ultra-large type sheepshead forging according to claim 8, which is characterized in that forged in step S93
The temperature of part ash charge is greater than 850 degree.
10. a kind of forging method of ultra-large type sheepshead forging according to claim 8, which is characterized in that rushed in step S92
The process in primary drying hole is divided into three phases, and the punching speed of first stage is 0.5 ~ 2mm/s, and the punching speed of second stage is 2 ~
5mm/s, the punching speed of phase III are 5 ~ 10mm/s.
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| CN201910037026.6A CN109604494B (en) | 2019-01-15 | 2019-01-15 | Forging method of ultra-large sheep head forging |
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| CN201910037026.6A CN109604494B (en) | 2019-01-15 | 2019-01-15 | Forging method of ultra-large sheep head forging |
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| CN109604494B CN109604494B (en) | 2023-06-27 |
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Cited By (1)
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