CN110508734A - A kind of near-net-shape method with warpage thin plate titanium alloy forging - Google Patents
A kind of near-net-shape method with warpage thin plate titanium alloy forging Download PDFInfo
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- CN110508734A CN110508734A CN201910812220.7A CN201910812220A CN110508734A CN 110508734 A CN110508734 A CN 110508734A CN 201910812220 A CN201910812220 A CN 201910812220A CN 110508734 A CN110508734 A CN 110508734A
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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
- B21J3/00—Lubricating during forging or pressing
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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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Abstract
The invention discloses a kind of near-net-shape methods with warpage thin plate titanium alloy forging, original blank is formed object construction part by two stages of blocking and finish-forging first by this method, so that the deformation quantity of the structural member in each stage is smaller, the shape control precision in each stage is improved, while reducing the defects of pulling or tear of forging process；Each time in forging process, different forging technologies is used for different forming parts, forging molding precision is improved, reduces fold defect caused by due to the mismatch of forging method and molded part size, generation the defects of pulling or tear, and the cleanliness for ultimately forming forging is good；It is found in practical application, the forging forged by this method, the first order fluorescence qualification rate of forging is increased to 100% from 20%, and forging qualification rate is increased to 98% or more from 60%；Ratio of briquetting is substantially increased, the waste of material is reduced.
Description
[technical field]
The invention belongs to structural member forging and molding technical fields, are related to a kind of near net with warpage thin plate titanium alloy forging
Manufacturing process.
[background technique]
Alloy near-net-shape forging machine-finish allowance with warpage thin plate is few, for forging's block dimension, shape and surface
Quality requirement is higher.Forging method is improper to be caused to generate a large amount of fold defects at forging thin plate warpage R；When trimming at warpage thin plate
The defects of generation is pulled, torn, causes forging largely to be scrapped.
For the alloy of eutectoid reaction can occur in hot-working and heat treatment process, if technique during heat treatment
It is improper to control, and the Secondary phase particle of precipitation will affect the mechanical property of material；If Ti-230 is that one kind contains intermetallic compound
Ti2The nearly α type Binary Titanium Alloys of Cu, Cu content is between 2% to 3%.The alloy can make under annealed condition or intensive conditions
With.Eutectoid reaction can occur in hot-working and heat treatment process for the alloy, if the process is not controlled properly, the Ti of precipitation2Cu particle
It will affect the mechanical property of material.
How to guarantee its mechanical property in forging process for such alloy with warpage thin plate, improve forging at
Type success rate is urgent problem.
[summary of the invention]
It is an object of the invention to overcome the above-mentioned prior art, provide a kind of with warpage thin plate titanium alloy forging
Near-net-shape method；This method is directed to the method for using near-net-shape with warpage thin plate forging, has saved material consumption, real
The accurate thickness for having showed forging warpage sheet section solves the problems, such as that forging warpage sheet section is pulled, torn
In order to achieve the above objectives, the present invention is achieved by the following scheme:
A kind of near-net-shape method with warpage thin plate titanium alloy forging, comprising the following steps:
Step 1, cutting and turned blank form original blank；The original blank include integrally connected cylindrical body and
Inversed taper platform；
Step 2, in original blank surface sprayed glass lubricant；
Step 3, the original blank for being coated with glass lubricant, which is placed in heating furnace, to be heated, and Preform Die is placed on
It is preheated in die holder；Original blank after heating is placed in Preform Die and carries out blocking, forms pre- forging after cooling；Institute
The initial warpage thin plate and initial boss that pre- forging includes integrally connected are stated, initial warpage thin plate is formed by cylinder upsetting
It arrives, initial boss is obtained by inversed taper platform extrusion molding；
Step 4, pre- forging is placed in heating furnace and is heated, finish-forging die is placed in die holder and is preheated；It will add
Pre- forging after heat, which is placed in finish-forging die, carries out finish-forging, forms finish-forging part after cooling；The finish-forging part includes integrally connected
Final warpage thin plate and final boss；Final warpage thin plate is formed to obtain by initial warpage thin plate jumping-up, and final boss is by first
Beginning boss extrusion molding obtains；
Step 5, finish-forging part is subjected to trimming processing；
Step 6, finish-forging part surface is cleared up, is terminated with the molding of warpage thin plate titanium alloy forging.
A further improvement of the present invention is that:
Preferably, in step 1, the seamed edge of cylindrical body outer end face and the seamed edge of inversed taper platform outer end face are carried out at rounded corner
Reason.
Preferably, in step 3, the diameter of cylindrical body is set as D1, the heating temperature of original blank is T in heating furnace1；Quilt
Wrought alloy from the phase transition temperature that alpha+beta phase transition is β phase be T0, T1=T0(20~40) DEG C；Heating time t in heating furnace1
=D1× (0.9~1.1).
Preferably, in step 4, the diameter of initial warpage thin plate is set as D2, the heating temperature of pre- forging is in heating furnace
T1, heating time t2=D2× (0.9~1.1).
Preferably, in step 3, the deformation quantity of cylindrical body to initial warpage thin plate is 30-40%, inversed taper platform to initial boss
Deformation quantity be 25-35%.
Preferably, in step 4, the deformation quantity of initial warpage thin plate to final warpage thin plate is 30-40%, and initial boss is extremely
The deformation quantity of final boss is 25-35%.
Preferably, in step 4, finish-forging die is placed on preheated in die holder after, by accurate backing plate be inserted in mold and
Between die holder, the lateral position of mold is adjusted；Final warpage gauge of sheet dimension precision requirement is 1.2+0.4mm.
Preferably, in step 2, the glass lubricant of spraying is with a thickness of 0.05~0.08mm.
Preferably, in step 1, roughness Ra=1.6 μm on original blank surface.
Preferably, in step 5, in trimming treatment process, the upper surface of mould is ask to be higher by the upper surface 0.5mm of former；Forging
In the process, the gap between formpiston and former is 0.08-0.1mm.
Compared with prior art, the invention has the following advantages:
The invention discloses a kind of near-net-shape method with warpage thin plate titanium alloy forging, this method first will be original
Blank forms object construction part by two stages of blocking and finish-forging, so that the deformation quantity of the structural member in each stage is smaller,
The shape control precision in each stage is improved, while reducing the defects of pulling or tear of forging process；It forged each time
Cheng Zhong, for different forming parts use different forging technologies, improve forging molding precision, reduce because forging method and at
The mismatch of type part size and generation the defects of cause the fold defect of forging, pull or tear, and ultimately form forging
Cleanliness is good；It is found in practical application, the forging forged by this method, the first order fluorescence qualification rate of forging is mentioned from 20%
For height to 100%, forging qualification rate is increased to 98% or more from 60%；Ratio of briquetting is substantially increased, the waste of material is reduced.
Further, the round corner treatment of original blank can reduce the generation of defect in subsequent forging process, improve forging
Make the surface quality of process.
Further, either blocking or finish-forging, the setting of heating temperature are set according to the phase transition temperature for being forged alloy
It sets, heating time is then arranged according to the most thick part of forging, guarantees that forging can be heated thoroughly.
Further, blocking and finish-forging stage are each provided with deflection, reduce the generation of defect in forging process.
Further, mold lateral position is adjusted by using the accurate backing plate of different-thickness, realizes alloy forged piece warpage
The control of the accurate thickness of sheet section.
Further, the position of support mould and former is rationally designed when trimming, the gap of former and formpiston solves forging and sticks up
The problem of bent sheet section is pulled, is torn.
[Detailed description of the invention]
Fig. 1 is preparation process flow chart of the invention；
Fig. 2 is the structural schematic diagram of original blank of the invention；
Fig. 3 is pre- forging main view of the invention；
Fig. 4 is pre- forging top view of the invention；
Fig. 5 is finish-forging part main view of the invention；
Fig. 6 is finish-forging part top view of the invention；
Fig. 7 is the structural schematic diagram that shaving die of the invention combines；
Wherein, 1 is original blank；1-1 is cylindrical body；1-2 is inversed taper platform；The pre- forging of 2-；The initial warpage thin plate of 2-1-；2-
The initial boss of 2-；3- finish-forging part；The final warpage thin plate of 3-1-；The final boss of 3-2-；4- holds in the palm mould；5- formpiston；6- former；Work under 7-
Make platform；8- rubber block；2-1-1- initial flat panel；2-1-2- is initially raised；2-1-3- planar section；2-1-4- side plate bending；3-1-1-
Final plate；3-1-2- is finally raised；3-1-3- horizontal segment；3-1-4- bending section；3-1-5- vertical section.
[specific embodiment]
The invention will be described in further detail with reference to the accompanying drawing；It is of the present invention to have referring to the flow chart of Fig. 1
The detailed process of warpage thin plate titanium alloy precision forging process for fuel is:
1, it cutting blank and processes
It selects lathe to cut blank by the billet size of calculating, is required according to the size of target finish-forging part, to blank one end
The processing of vehicle inversed taper platform is carried out, forms original blank 1, the original blank 1 includes cylindrical body 1-1 and inversed taper platform 1-2, such as Fig. 2 institute
Show, the diameter of cylindrical body 1-1 is D1, the diameter of inversed taper platform 1-2 is d1, Ra=1.6 μm of machined surface roughness；Cylindrical body 1-1 and
Inversed taper platform 1-2 is two parts of original blank 1, is integrated connection structure, the big end face of the cross-sectional area of inversed taper platform 1-2 and cylinder
One end of body 1-1 connects, and inversed taper platform 1-2 small end face is outer end face；The seamed edge of cylindrical body 1-1 outer end face is carried out at rounded corner
The seamed edge of reason, inversed taper platform 1-2 outer end face carries out round corner treatment, rounding radii R2, made by rounded corner subsequent
Forging process can reduce the generation of process defect, improve the surface quality of forging process.
2, blank surface brushes glass
In 1 surface even application glass lubricant of original blank, glass lubricant is put with a thickness of 0.05~0.08mm, blank
It is placed on dedicated materials and parts and dries；Reached by sprayed glass lubricant so that forming fluid film between mold and blank contact surface
The purpose of two contact surfaces is separated, to play the role of lubrication and insulation.
3, heating, blocking
(1) original blank 1 for being coated with glass lubricant is placed in heating furnace, and heating furnace is qualified by standard thermometric,
Meet the uniformity requirement of furnace temperature ± 10 DEG C, the temperature of heating process is to be forged under metal alpha+beta/β phase transition point (20~40)
DEG C, soaking time t1=D1× (0.9~1.1) min/mm guarantees that original blank 1 can be sufficiently heated；Original blank 1 is adding
While being heated in hot stove, mold is preheated by the preheating device of die holder, preheating temperature is 200-300 DEG C, preheating
Time 1-1.5 hour.
(2) internal cavity that Preform Die is uniformly lubricated with colloidal graphite mixed with water, improves the lubricity of forging process.
(3) by the internal cavity that the original blank 1 that heats is placed in Preform Die in furnace is added, wherein back taper
Platform 1-2 is placed in lower die, starts to carry out blocking；Blocking is carried out using friction press, during blocking, is formed by jumping-up
Cylindrical body 1-1, forging inversed taper platform 1-2 molding by extrusion are forged, the forging of original blank 1 becomes blocking part 2；Wherein, it is upset
Cylindrical body 1-1 after molding forging forms initial warpage thin plate 2-1, and the inversed taper platform 1-2 after being squeezed into shape forging is formed initially
Boss 2-2, as shown in Figure 3 and Figure 4, the diameter of initial warpage thin plate 2-1 are D2, the diameter of initial boss 2-2 is d2；Cylindrical body
The deformation quantity of 1-1 to initial warpage thin plate 2-1 is 30-40%, and the deformation quantity of inversed taper platform 1-2 to initial boss 2-2 is 25-
35%；The initial warpage thin plate 2-1 includes the initial flat panel 2-1-1 and initial protrusion 2-1-2 of integrally connected, described initial flat
Plate 2-1-1 is flat cambered surface, and outside is camber line, and inside is straight line, and inside is connected with initial protrusion 2-1-2；Initial protrusion
2-1-2 includes upper and lower surfaces, and upper surface is plane, and the inner end of upper surface is connected with initial flat panel 2-1-1, outboard end
It is connected with lower surface；Lower surface includes planar section 2-1-3 and side plate bending 2-1-4, the upside of side plate bending 2-1-4 and upper surface it is outer
Side connection, the downside of side plate bending 2-1-4 connect with the outboard end of planar section 2-1-3, the inner end of planar section 2-1-3 and initially
Plate 2-1-1 connection；The lateral surface of initial boss 2-2 and the junction of initial flat panel 2-1-1 carry out round corner treatment.
(4) natural cooling after taking out pre- forging, for use.
4, heating, finish-forging
(1) pre- forging 2 is placed in heating furnace, heating furnace is qualified by standard thermometric, meets the uniform of furnace temperature ± 10 DEG C
Property require, the temperature of heating process is to be forged under metal alpha+beta/β phase transition point (20~40) DEG C, soaking time t2=D2×
(0.9~1.1) min/mm guarantees that pre- forging 2 can be sufficiently heated；While pre- forging 2 is heated in heating furnace, pass through
The preheating device of die holder preheats finish-forging die, and preheating temperature is 200-300 DEG C, preheating time 1-1.5 hour.
(2) internal cavity that finish-forging die is uniformly lubricated with colloidal graphite mixed with water, improves the lubricity of forging process.
(3) accurate backing plate is placed between mold and die holder, adjusts the lateral position between mold and die holder, guaranteed most
The thickness of whole warpage thin plate 3-1 meets the required precision of 1.2+0.4mm；The reason of step carries out are as follows: in forging process,
In forging gap each time, upper/lower die is in closure, in fact it could happen that left and right cannot be just to the warpage that just, will affect forging
Segment thickness size adjusts separately between upper mold and die holder so needing to be inserted into accurate backing plate between mold and die holder
Lateral position between lateral position and lower mold and die holder, it is ensured that forging precise measure；Accurate backing plate with a thickness of 0.2-
1mm；After the completion of the step, the operation of next step finish-forging is carried out.
(4) original blank 1 heated in heating furnace is placed in the internal cavity of finish-forging die, wherein back taper
Platform 1-2 is placed in lower die, starts to carry out finish-forging；It selects friction press to carry out finish-forging, during finish-forging, is formed by jumping-up
Initial warpage thin plate 2-1, the initial boss 2-2 of forging molding by extrusion are forged, the pre- forging of forging 2 becomes finish-forging part 3；Wherein,
Initial warpage thin plate 2-1 after being upset as swaged forging forms final warpage thin plate 3-1, the initial boss after being squeezed into shape forging
2-2 forms final boss 3-2, as shown in Figure 5 and Figure 6；Initially the deformation quantity of warpage thin plate 2-1 to final warpage thin plate 3-1 are
The deformation quantity of 30-40%, initial boss 2-2 to final boss 3-2 are 25-35%；The final warpage thin plate 3-1 includes one
The final plate 3-1-1 of connection and final protrusion 3-1-2, final plate 3-1-1 is flat cambered surface, and outside is camber line, interior
Side is straight line, and inside is connected with final protrusion 3-1-2；Final protrusion 3-1-2 includes horizontal segment 3-1-3, bending section 3-1-4 and erects
Straight section 3-1-5, one end of horizontal segment 3-1-3 is connected with the inside of final plate 3-1-1, under the other end and bending section 3-1-4
End connection, the upper end of bending section 3-1-4 are connected with vertical section 3-1-5, and horizontal segment 3-1-3 and vertical section 3-1-5 are plate knot
Structure, bending section 3-1-4 are camber plate structure, the lower surface of bending section 3-1-4, the lower surface of horizontal segment 3-1-3 and final flat
The equal upper surface integrally connected with final boss 3-2 in the lower surface of plate 3-1-1；The lateral surface and horizontal segment 3- of final boss 3-2
The junction of 1-3 carries out round corner treatment.
Final plate 3-1-1 is obtained after being upset as swaged forging and making by initial flat panel 2-1-1；Final protrusion 3-1-2 is by first
Protrusion 2-1-2 was forged after jumping-up forms and was obtained beginning.
5, trimming
Trimming is carried out to finish-forging part 3 by trimming die combination to go out；Referring to Fig. 7, the trimming die combination includes support mould 4, sun
Mould 5, former 6, lower table 7 and rubber block 8.The former 6 is fixed on lower table 7, and support mould is provided in former 6
4, the bottom of support mould 4 is provided with rubber block 8, and the bottom of rubber block 8 is fixedly connected with lower table 7；Finish-forging part 3 is placed on support mould
In 4, by asking mould 4 to position it, formpiston 5 is in the top of former 6；Support 4 upper surface of mould is higher by 6 upper surface 0.5mm of former,
When formpiston 5 and former 6 are combined together, gap is (0.08~0.1) mm between formpiston 5 and former 6.Finish-forging part 3 is steady
Be placed on support mould 4, carry out trimming, formpiston 5 quickly falls, press lower supporting mold 4, extra overlap got rid of using shearing force,
Formpiston 5 quickly rises, and support mould 4 bounces under the action of rubber block 8, takes out finish-forging part 3.
6, it clears up
Forging watch crystal is removed using chemical attack and wet blast.
7, fluoroscopy forging defect
Forging carries out the defects of fluoroscopy surface laps, crackle, such as finds defect, carries out grinding process to fault location.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of near-net-shape method with warpage thin plate titanium alloy forging, which comprises the following steps:
Step 1, cutting and turned blank are formed original blank (1)；The original blank (1) includes the cylindrical body of integrally connected
(1-1) and inversed taper platform (1-2)；
Step 2, in original blank (1) surface sprayed glass lubricant；
Step 3, the original blank (1) for being coated with glass lubricant, which is placed in heating furnace, to be heated, and Preform Die is placed on
It is preheated in die holder；Original blank (1) after heating is placed in Preform Die and carries out blocking, forms pre- forging after cooling
(2)；The pre- forging (2) includes initial warpage thin plate (2-1) and the initial boss (2-2) of integrally connected, initial warpage thin plate
(2-1) is formed to obtain by cylindrical body (1-1) jumping-up, and initial boss (2-2) is obtained by inversed taper platform (1-2) extrusion molding；
Step 4, pre- forging (2) is placed in heating furnace and is heated, finish-forging die is placed in die holder and is preheated；It will heating
Pre- forging (2) afterwards, which is placed in finish-forging die, carries out finish-forging, forms finish-forging part (3) after cooling；The finish-forging part (3) includes one
The final warpage thin plate (3-1) of body connection and final boss (3-2)；Final warpage thin plate (3-1) is by initial warpage thin plate (2-1)
Jumping-up forms to obtain, and final boss (3-2) is obtained by initial boss (2-2) extrusion molding；
Step 5, finish-forging part (3) are subjected to trimming processing；
Step 6, finish-forging part (3) surface is cleared up, is terminated with the molding of warpage thin plate titanium alloy forging.
2. a kind of near-net-shape method with warpage thin plate titanium alloy forging according to claim 1, which is characterized in that
In step 1, the seamed edge of cylindrical body (1-1) outer end face and the seamed edge of inversed taper platform (1-2) outer end face carry out round corner treatment.
3. a kind of near-net-shape method with warpage thin plate titanium alloy forging according to claim 1, which is characterized in that
In step 3, the diameter of cylindrical body (1-1) is set as D1, the heating temperature of original blank (1) is T in heating furnace1；It is forged alloy
It is T from the phase transition temperature that alpha+beta phase transition is β phase0, T1=T0(20~40) DEG C；Heating time t in heating furnace1=D1×(0.9
~1.1).
4. a kind of near-net-shape method with warpage thin plate titanium alloy forging according to claim 3, which is characterized in that
In step 4, the diameter of initial warpage thin plate (2-1) is set as D2, the heating temperature of pre- forging (2) is T in heating furnace1, when heating
Between t2=D2× (0.9~1.1).
5. a kind of near-net-shape method with warpage thin plate titanium alloy forging according to claim 1, which is characterized in that
In step 3, the deformation quantity of cylindrical body (1-1) to initial warpage thin plate (2-1) is 30-40%, inversed taper platform (1-2) to initial boss
The deformation quantity of (2-2) is 25-35%.
6. a kind of near-net-shape method with warpage thin plate titanium alloy forging according to claim 1, which is characterized in that
In step 4, the deformation quantity of initial warpage thin plate (2-1) to final warpage thin plate (3-1) is 30-40%, and initial boss (2-2) is extremely
The deformation quantity of final boss (3-2) is 25-35%.
7. a kind of near-net-shape method with warpage thin plate titanium alloy forging according to claim 1, which is characterized in that
In step 4, finish-forging die is placed on preheated in die holder after, accurate backing plate is inserted between mold and die holder, adjust mould
The lateral position of tool；The thickness required precision of final warpage thin plate (3-1) is 1.2+0.4mm.
8. a kind of near-net-shape method with warpage thin plate titanium alloy forging according to claim 1, which is characterized in that
In step 2, the glass lubricant of spraying is with a thickness of 0.05~0.08mm.
9. a kind of near-net-shape method with warpage thin plate titanium alloy forging according to claim 1, which is characterized in that
In step 1, roughness Ra=1.6 μm on original blank (1) surface.
10. the near-net-shape method of warpage thin plate titanium alloy forging is had described in -9 any one according to claim 1, it is special
Sign is, in step 5, in trimming treatment process, the upper surface of support mould (4) is higher by the upper surface 0.5mm of former (6)；It forged
Cheng Zhong, the gap between formpiston (5) and former (6) are 0.08-0.1mm.
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| CN201910812220.7A CN110508734B (en) | 2019-08-30 | 2019-08-30 | Near-net forming method for titanium alloy forged piece with warped thin plate |
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| CN201910812220.7A CN110508734B (en) | 2019-08-30 | 2019-08-30 | Near-net forming method for titanium alloy forged piece with warped thin plate |
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| CN109093048A (en) * | 2018-08-01 | 2018-12-28 | 西安三角防务股份有限公司 | A kind of mainframe lock forging mold and forging method |
| CN109352279A (en) * | 2018-11-14 | 2019-02-19 | 中国航发动力股份有限公司 | A kind of die-forging forming method of TC4 titanium alloy circle-T shape Forging |
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| US20170243685A1 (en) * | 2007-04-19 | 2017-08-24 | Indimet, Inc. | Solenoid Housing and Method of Providing a Solenoid Housing |
| CN101695736A (en) * | 2009-11-04 | 2010-04-21 | 中国船舶重工集团公司第七二五研究所 | Method for making titanium alloy diaphragm plate forged piece |
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| CN110508734B (en) | 2021-01-26 |
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