CN106734481B - A kind of Small Taper cylindrical member composite spinning processing method - Google Patents

A kind of Small Taper cylindrical member composite spinning processing method Download PDF

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Publication number
CN106734481B
CN106734481B CN201611094314.8A CN201611094314A CN106734481B CN 106734481 B CN106734481 B CN 106734481B CN 201611094314 A CN201611094314 A CN 201611094314A CN 106734481 B CN106734481 B CN 106734481B
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China
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spinning
small taper
blank
cylindrical
small
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CN201611094314.8A
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CN106734481A (en
Inventor
杨延涛
曹学文
赵琳瑜
罗卉
方拓
王少奇
王鹏伟
辛磊波
师宝钢
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西安航天动力机械厂
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/14Spinning
    • B21D22/16Spinning over shaping mandrels or formers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00Tools as parts of machines covered by this subclass
    • B21D37/10Die sets; Pillar guides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00Making hollow objects
    • B21D51/02Making hollow objects characterised by the structure of the objects
    • B21D51/10Making hollow objects characterised by the structure of the objects conically or cylindrically shaped objects

Abstract

A kind of Small Taper cylindrical member composite spinning processing method, in conjunction with the general rotation forming Tapered Cup of plate and Thin-walled Straight coupling barrel Forming Theory, using mould pressing Small Taper thin-wall tube-shaped element reversed after positive mould pressing Small Taper cylindrical member prefabricated blank, keep spinning blank inner mold face cone degree and size and spinning mold external surface laminating degree preferable, assembly precision is higher, in reversed spinning process, due to the presence of spinning roller radial force and axial force, which is rotated with spinning mold with close linear velocity.The design method of the spinning blank has fully considered the loading characteristic of reversed mould pressing feature and taper spinning blank, it is closed by spinning blank inner mold face paste and spinning process radial force, axial force has banks, blank slipping phenomenon in spinning process is effectively reduced, spinning cylindrical member inner surface apparent mass is improved.

Description

A kind of Small Taper cylindrical member composite spinning processing method
Technical field
The present invention relates to spinning manufacturings, specifically pre- using positive spin-on process preparation high-precision Small Taper cylindrical member After base, reversed spin-on process shapes Small Taper tubular construction part of the taper less than 1 °.
Background technique
Demand with the rapid development of China's Aeronautics and Astronautics technology and national economy, to Small Taper thin-wall tube-shaped element Also more and more, more more and more urgent, such as certain Small Taper cylindrical member components:
Part material is unimach 31Si2MnCrMoVE, and closed tubular construction, semi-cone angle is 0.5 °, and length is big In 2500mm, which has the processing problems such as overall size is big, wall thickness is thin, easily-deformable, required precision is high.
By investigation, three sets of plan are mainly taken in the processing of similar structures part in the market: 1, plate is coiling welded;2, positive rotation It presses once-forming;3, two section forward direction spinning cylindrical member groups are welded.There are following deficiencies for above-mentioned three kinds of schemes:
1, the coiling welded forming of plate, uses unimach 31Si2MnCrMoVE plate as raw material, in coiling welded process In, circularity, the straightness equidimension of Small Taper cylindrical member are more demanding, reliable guarantee are unable to get, simultaneously because there is vertical weldering Seam, the reduced performance of cylindrical member, the cylindrical member working environment are high temperature and pressure, and there are biggish security risks.It is coiling welded in plate In processing, needs to increase the processes such as flaw detection, annealing, weld joint mechanical polishing, increase manufacturing cost.
2, positive spinning is once-forming, since part length is greater than 2500mm, the cylindrical member end in spinning process in addition Examination rotation etc., length will be further increased, and at this moment the travel of spindle of required spinning machine will be much larger than 2500mm, device fabrication difficulty Increase, equipment cost will be unable to be effectively controlled, and general enterprises can not bear high cost of equipment, not have extensive work Industry working condition;Meanwhile spinning mold needed for the positive mould pressing of cylindrical member of the length greater than 2500mm also must be big There is the effective length of cylindrical member, greatly increases spinning mold manufacture difficulty and cost control.
3, two section forward direction spinning cylindrical member groups are welded, and are needed to make more set core models and other matching toolings, are considerably increased core The cost of mould production and management, according to existing correlation statistical analysis, when produced in large volumes, spinning mold cost accounts for about totle drilling cost 20%~30%, when small lot single-piece production, spinning mold cost accounts for about totle drilling cost 60%~70%.Meanwhile two section it is positive Need to increase apolegamy process when spinning cylinder group is welded to guarantee that welding position size matches;Due to welding thermal deformation, Small Taper cylinder Circularity, the straightness equidimension of shape part are unable to get reliable guarantee, simultaneously because cylindrical member is at girth joint position there are girth joint Strength reduction, the cylindrical member working environment are high temperature and pressure, and there are biggish security risks.In two section forward direction spinning cylindrical member groups In weldering processing, needs to increase the processes such as circumferential welded seam flaw detection, mechanical grinding, annealing, increase manufacturing cost.
Existing the relevant technologies are mainly thin-walled Small Taper cylindrical member forward direction mould pressing and the reversed spinning of Thin-walled Straight cylindrical member Two kinds of forming.Thin-walled Small Taper cylindrical member forward direction spin forming technique is mature, but has the disadvantage that needed for 1, former Stroke is longer, involves great expense, and general enterprises can not be born;2, when thin-walled Small Taper cylindrical member length is longer, spinning mold manufacture Difficulty is larger, and die cost is higher.The reversed spin forming technique of Thin-walled Straight cylindrical member is mature, and large-scale application in work Industry metaplasia produces, but is only used for the forming of Thin-walled Straight cylindrical member, does not have thin-walled Small Taper coupling barrel forming capacity.Positive spinning Forming carries out Small Taper thin-wall tube-shaped element rotary pressing processing technology in conjunction with reversed mould pressing and does not carry out correlative study also.
Summary of the invention
To overcome high processing cost existing in the prior art, positive spin forming technique and reversed spin forming technique knot Conjunction method is not used for the deficiency of thin-walled Small Taper cylindrical member, and the invention proposes a kind of processing of Small Taper cylindrical member composite spinning Method.
1. a kind of Small Taper cylindrical member composite spinning processing method, which is characterized in that detailed process is:
Step 1, mould carcass is made:
The mould carcass is hollow revolving body, is divided into construction section and active section.The circumferential surface of the active section is work Face;The working face is the conical surface, and the semi-cone angle of the working face is determined according to formula 1:
In formula: ψ is the semi-cone angle of mould carcass working face;For the semi-cone angle of Small Taper cylindrical member.
There is stair-stepping through-hole at the center of the mould carcass;
The aperture that the through-hole is located at mould carcass construction section one end is greater than the aperture of active section,
The construction section is located at big outer diameter one end of active section.And the inner surface in the mould carcass construction section end face aperture For the conical surface.The mounting hole of stud is evenly equipped in the construction section end face.The conical surface of the construction section inner hole and spinning owner The excircle cone match of axis.
Small 20~the 30mm of internal diameter at the outer diameter outer diameter end smaller than Small Taper cylindrical member at the small outer diameter end of mould carcass, as examination Rotation processing and machine add the surplus of trimming.
Step 2, prepared by Small Taper coupling barrel blank.The Small Taper coupling barrel blank inner surface is the conical surface, And the semi-cone angle θ of the conical surface is determined according to formula 2:
θ=(1.5~2) ψ 2
In formula: θ is the semi-cone angle of Small Taper coupling barrel blank 3;ψ is the semi-cone angle of mould carcass working face.
Step 3, tooling is installed.
The tooling installation includes installation spinning mold and spinning roller.
I installation spinning mold, the main shaft of mould carcass installation end end surface taper hole and spinning machine in spinning mold is cooperated, and It is fastenedly connected by stud.
The installation of II spinning roller, will be revolved using double rotary wheel synchronous backward spin-on process using the spinning roller of R8/30 ° of biconical surface structure The wheel angle of attack is adjusted to vertical with spinning mold mould carcass song bus, and spinning roller can rotate freely, and guarantees roller working radius position One circle of rotation, roller working radius Circular Run-out Tolerance≤0.15mm.
Step 4, positive spinning parameter setting.The spinning machine speed of mainshaft is 80~120r/min, axial feed velocity 80 ~120mm/min.The Reducing thickness of Small Taper coupling barrel blank is set according to the technological requirements.According to the rigidity and rotation of spinning machine The springback capacity of wheel determines the spinning gap between spinning roller and mould carcass working face.
Step 5, spinning blank is installed.The Small Taper coupling barrel blank is set on mould carcass, and makes conelet Degree coupling barrel blank small end inner surface is bonded with mould carcass small end outer surface.
Step 6, positive rotary pressing processing: radial to keep the spinning gap between spinning roller and mould carcass working face constant;By setting Fixed rotary pressure process parameter carries out Small Taper cylindrical member prefabricated blank forward direction rotary pressing processing.It is cooled down and is lubricated in spinning process, Coolant rate >=200L/min, after processing is completed discharging obtain Small Taper cylindrical member prefabricated blank.
Step 7, it makes annealing treatment.Small Taper cylindrical member prefabricated blank is made annealing treatment.The temperature of annealing be 700~ 740℃;Soaking time is 70~90min.Cool down after heat preservation with furnace.
Step 8, reversed spinning parameter setting.The spinning machine speed of mainshaft is set as 80~120r/min, axial feed velocity For 80~120mm/min.The Reducing thickness of Small Taper cylindrical member prefabricated blank is set according to the technological requirements.According to the rigidity of spinning machine and The springback capacity of spinning roller determines the spinning gap between spinning roller and mould carcass working face.
Step 9, Small Taper cylindrical member prefabricated blank is installed.The Small Taper cylindrical member prefabricated blank is set on mould carcass, And it is bonded Small Taper cylindrical member prefabricated blank small end inner surface with mould carcass small end outer surface, make the Small Taper tubular at remaining position Fit-up gap≤0.15mm between part prefabricated blank and mould carcass working face.
Step 10, reversed rotary pressing processing: radial to keep the spinning gap between spinning roller and mould carcass working face constant.Using Double rotary wheel synchronous backward spinning carries out rotary pressing processing to Small Taper cylindrical member prefabricated blank.It is cooled down and is lubricated in spinning process, Coolant rate >=200L/min.Obtain the semi-finished product of Small Taper cylindrical member.
Step 11, subsequent processing: reversed spinning after the test, carries out obtained Small Taper cylindrical member semi-finished product subsequent Processing, obtains Small Taper cylindrical member.
The present invention is for shaping thin-wall tube-shaped structural member of the semi-cone angle less than 1 °.
The general rotation forming Tapered Cup of present invention combination plate and Thin-walled Straight coupling barrel Forming Theory propose positive spinning Reversed mould pressing Small Taper thin-wall tube-shaped element processing technology after forming Small Taper cylindrical member prefabricated blank.
Made product spinning mold and the Small Taper thin-wall tube-shaped element adapted to product spinning mold taper size Spinning blank.It is easy to appear spinning blank slipping phenomenon in general reversed spinning process, influences spinning cylindrical member inner surface Apparent mass, the present invention in the spinning blank inner mold face cone degree and size and spinning mold external surface laminating degree it is preferable, assemble Precision is higher, in reversed spinning process, due to the presence of spinning roller radial force and axial force, the spinning blank with spinning mold with Close linear velocity rotation.The design method of the spinning blank has fully considered reversed mould pressing feature and taper spinning blank Loading characteristic, by spinning blank inner mold face paste close and spinning process radial force, axial force there are banks, Blank slipping phenomenon in spinning process is effectively reduced, spinning cylindrical member inner surface apparent mass is improved.
Using the present invention, using unimach material during positive rotary pressing processing, Small Taper coupling barrel hair Base wall thickness reduction, length direction increase, taper reduce this characteristic, make Small Taper coupling barrel blank spinning roller radial force with Under the collective effect of axial force, stress deformation, material flowing are configured to the Small Taper cylindrical member prefabricated blank of required size.Forward direction rotation When pressure, since spinning blank inner mold face paste is closed, spinning mold and spinning process spinning radial force, there are centripetal for spinning axial force The characteristics of component can pre-tighten automatically, spinning blanked metal is flowed to spinning mold big end and mold shapes, and that is at this moment processed is small Taper cylindrical member prefabricated blank dimensional accuracy is higher and inner surface apparent mass is preferable, simultaneously because mold is preferable, prefabricated blank with Spinning mold gap is smaller, and prefabricated blank is less prone to slipping phenomenon in subsequent reversed spinning process, improves in spinning cylindrical member Surface apparent mass.
Using the present invention, using unimach material during reversed rotary pressing processing, wall thickness reduction length direction increases Add this characteristic, makes the prefabricated spinning blank of Small Taper thin-wall tube-shaped element under the collective effect of spinning roller radial force and axial force, by Power deformation, material flowing are configured to the flow formed part of required size.In reversed spinning process, spinning blank un-deformed area with Spinning mold high-precision is bonded, and with the rotation of similar linear velocity, good spinning blank and spinning mold cooperate, and the earth reduces Slipping phenomenon, it is ensured that the rotation of entire spinning cylindrical member is good;Spinning blank below spinning roller is deformed area, region gold Belong to by spinning mold and spinning roller double reaction plus, by adjusting spinning gap and rotary pressure process parameter, guarantees that the regional metal exists Deformation stage always by spinning roller and spinning mold pressure, stablize by thinning and reversed elongation strain;Deformed area metal is due to wall thickness It is thinned, length elongation, thin-wall regions are continuously increased with spinning mold gap, and constraint reduces, and are easy to happen vibration, are swung, cause Cylindrical member overall precision is poor, in the present invention, is cooperated by good spinning blank and spinning mold, significantly reduces skidding Phenomenon, it is ensured that the rotation of entire spinning cylindrical member, while effective mold of un-deformed area metal, deformed area metal is utilized, And rotated with spinning mold with close linear velocity, avoid formed thin segment due to spinning mold gap it is larger cause constraint compared with There is vibration, whipping phenomenon in difference, it is ensured that Small Taper thin-wall tube-shaped element dimensional accuracy.Half cone can be realized by above-mentioned process The reversed mould pressing of Small Taper thin-wall tube-shaped element infrastructure product of the angle less than 1 °, reaches design, using dimension precision requirement.
The present invention is when preparing spinning mold, according to the size and deformation of the Small Taper thin-wall tube-shaped element of required processing Power designs suitable spinning mold, it is ensured that in positive spinning, reversed spin-forming procedure, elongation strain is thinned and stablizes, simultaneously It also needs to have the function of easy disassembly, it is ensured that match with existing spinning machine and installation accuracy is higher.
The spinning mold that the present invention uses, including mould carcass and stud.Wherein: mould carcass is rotary pressing processing process master Working position, using after the mould steel monoblock cast of higher-strength and hardness solid solution, machine add, working face taper with it is added The matching of work Small Taper thin-wall tube-shaped element taper, installation end surface taper hole and spinning machine main shaft cooperate, and connected by stud, Fastening;Stud selects different standard models according to institute's converted products size and pretightning force size, is uniformly distributed by 6 After the mounting hole of mould carcass installation end face side is installed on mould carcass, after mounting hole cooperation corresponding with spinning machine main shaft position It is fastened with nut.The selection of stud will fully consider the size of pretightning force, guarantee that the entirety of tooling in process is steady It is qualitative, anti-sliding stop, bending, to improve the shaped position and surface accuracy of workpiece.
When reversed rotary pressing processing, using double rotary wheel synchronous backward spinning processing method, the spinning roller angle of attack adjust to spinning block It is vertical to have mould carcass song bus.Spinning blank in spinning process below spinning roller is deformed area, and the region spinning blank is by spinning Mold and spinning roller double reaction plus, it is ensured that the spinning blank in the region is in deformation stage always by spinning roller and spinning mold pressure Power continues thinning and reversed elongation.The spinning blank of deformed area is due to wall thickness reduction, length elongation, thin-wall regions and spinning Die clearance is continuously increased, and constraint reduces, at this moment the effective mold of un-deformed area metal, deformed area metal, and with spinning block For tool with the rotation of close linear velocity, slipping phenomenon is smaller.Simultaneously using undeformed area and deformed area be effectively bonded and Small Taper Spinning radial force, spinning axial force have that banks can pre-tighten automatically when cylindrical member reversed spinning, reduce spinning Blank slipping phenomenon in the process avoids formed thin segment due to constraining poor appearance vibration, whipping phenomenon, improves Small Taper Spinning cylindrical member quality.
The invention has the following advantages that
1. spinning mold cost is effectively reduced using the process of positive spinning and reversed spinning Compound Machining, when When mass production, spinning mold cost about 20%~30% is reduced, when small lot single-piece production, reduces spinning mold cost About 60%~70%.Realize the forming technology that shorter spinning mold produces longer thin-walled Small Taper cylindrical member.
2. realizing the production of longer thin-walled Small Taper cylindrical member using the lesser spinning machine of existing stroke, rotation is improved Press the utilization rate about 50% or more of equipment.
3. avoiding the processes such as coiling welded cylindrical member, the welding of group weldering cylindrical member, flaw detection, annealing, weld joint mechanical polishing, reduce Manufacturing cost about 30% or more carrys out the thin-walled Small Taper cylindrical member for the field of aerospace that working environment is high temperature and pressure It says, the reduction of longitudinal seam improves the intensity of cylindrical member, effectively raises the safety and reliability of cylindrical member.
4. the present invention realizes positive and reversed mould pressing Small Taper cylindrical member, spinning mold benefit on a set of spinning mold 50% or more is improved with rate.
5. the present invention is using positive spinning, there are banks, spinning blank can be certainly for spinning radial force, spinning axial force The characteristics of dynamic preload and mold mould pressing, preparation is in high precision and prefabricated with the Small Taper cylindrical member that spinning mold is effectively bonded Base reduces caused by blank spins in reversed spinning process in subsequent reversed spinning process and deforms unstable and inner surface table The problem of appearance quality difference.
When 6. the present invention is using reversed spinning undeformed area and deformed area be effectively bonded and Small Taper cylindrical member is reversed Spinning radial force, spinning axial force have that banks can pre-tighten automatically when spinning, reduce blank in spinning process Slipping phenomenon avoids formed thin segment due to constraining poor appearance vibration, whipping phenomenon, improves Small Taper spinning cylindrical member Quality.
Detailed description of the invention
Fig. 1 is positive rotary pressing processing schematic diagram.
Fig. 2 is reversed rotary pressing processing schematic diagram.
Fig. 3 is flow chart of the invention.In figure:
1. stud;2. mould carcass;3. Small Taper coupling barrel blank;4. spinning roller;5. Small Taper cylindrical member is prefabricated Base;6. Small Taper cylindrical member.
Specific embodiment
Embodiment 1
The present embodiment is for processing unimach 31Si2MnCrMoVE thin-walled Small Taper cylindrical member, institute's workpieces processing Semi-cone angle be 0.5 °, length 2560mm, wall thickness 2mm, end diameter Φ 300mm.
Step 1, mould carcass is made:
The mould carcass 2 is mold needed for spinning.The mould carcass 2 be hollow revolving body, be divided into construction section and Active section.The circumferential surface of the active section is working face;The working face is the conical surface, and the semi-cone angle of the working face is according to public affairs Formula 1 determines:
In formula: ψ is the semi-cone angle of 2 working face of mould carcass;For the semi-cone angle of Small Taper cylindrical member 5.
The construction section is located at big outer diameter one end of active section.There is stair-stepping through-hole at the center of the mould carcass 2;
The aperture that the through-hole is located at 2 construction section one end of mould carcass is greater than the aperture of active section, and the mould carcass 2 is pacified The inner surface for filling section end face aperture is the conical surface.The mounting hole of stud 1 is evenly equipped in the construction section end face.
The conical surface of the construction section inner hole and the excircle cone match of spinning machine main shaft.
The outer diameter at the small outer diameter end of mould carcass 2 is 20~30mm smaller than the internal diameter at the small outer diameter end of Small Taper cylindrical member 6, as examination Rotation processing and machine add the surplus of trimming.
The mould carcass 2 is added using solid solution, machine after mould steel monoblock cast.
In the present embodiment: mould carcass 2 is added using solid solution, machine after mould steel monoblock cast, working face taper half cone Angle is 1 °.The outer diameter at the small outer diameter end of mould carcass 2 is 20mm smaller than the internal diameter at the small outer diameter end of Small Taper cylindrical member 6.
Step 2, prepared by Small Taper coupling barrel blank.By design requirement, forges and be heat-treated to passing through, and detect a flaw and close The blank of lattice carries out smart car, obtains Small Taper coupling barrel blank 3.3 inner surface of Small Taper coupling barrel blank is The conical surface, and the semi-cone angle θ of the conical surface is determined according to formula 2:
θ=(1.5~2) ψ 2
In formula: θ is the semi-cone angle of Small Taper coupling barrel blank 3;ψ is the semi-cone angle of 2 working face of mould carcass.
In the present embodiment: Small Taper coupling barrel blank 3 added using unimach 31Si2MnCrMoVE machine and At.Specific size is small end diameter of bore Φ 260mm, and with a thickness of 10mm, semi-cone angle is 2 °, flange diameter of bore Φ 240mm.Rotation Pressure blank size precision and apparent mass need to meet rotary pressing processing requirement.
Step 3, tooling is installed.
The tooling installation includes installation spinning mold and spinning roller 4.
I installation spinning mold, the main shaft of 2 installation end end surface taper hole of mould carcass and spinning machine in spinning mold is cooperated, And it is fastenedly connected by stud 1.Stud 1 is uniformly distributed in the mounting hole that mould carcass 2 installs end face side by 6 After being installed on mould carcass 2, fastened after mounting hole cooperation corresponding with spinning machine main shaft position with nut.The preload of stud 1 Power need to guarantee the overall stability of tooling in process, anti-sliding stop, bending, to improve the shaped position and table of workpiece Face precision.In the present embodiment, after spinning mold installs, guarantee the 2 tooling face ring of mould carcass to circle bounce≤0.15mm.
The installation of II spinning roller, the present embodiment use double rotary wheel synchronous backward spin-on process, use R8/30 ° of biconical surface structure Spinning roller 4 adjusts 4 angle of attack of spinning roller to vertical with the bent bus of spinning mold mould carcass 2, and spinning roller 4 can rotate freely, and guarantee spinning roller 4 radius of corner positions rotation, one circle, roller working radius Circular Run-out Tolerance≤0.15mm.
Step 4, positive spinning parameter setting.The spinning machine speed of mainshaft is set as 80~120r/min, axial feed velocity For 80~120mm/min,.The Reducing thickness of Small Taper coupling barrel blank 3 is set according to the technological requirements.According to the rigid of spinning machine The springback capacity of property and spinning roller 4 determines the spinning gap between 2 working face of spinning roller 4 and mould carcass, to meet processing request.
In the present embodiment, the Reducing thickness of Small Taper coupling barrel blank 3 is 4mm.The springback capacity of spinning roller is 0.5mm, therefore Spinning gap is 5.5mm, 4 drafts 4.5mm of spinning roller.The radial feed speed of spinning roller 4 is 0mm/min, and axial feed velocity is 80mm/min, speed of mainshaft 100r/min.
Step 5, spinning blank is installed.The Small Taper coupling barrel blank 3 is set on mould carcass 2, and is made small 3 small end inner surface of taper coupling barrel blank is bonded with 2 small end outer surface of mould carcass.
The banks that high assembly precision can make full use of spinning process spinning radial force, spinning axial force generates, Realize automatic the characteristics of pre-tightening, it is effective to reduce 3 slipping phenomenon of Small Taper coupling barrel blank in spinning process, improve spinning Cylindrical member inner surface apparent mass.
Step 6, positive rotary pressing processing: radial to keep the spinning gap between spinning roller 4 and 2 working face of mould carcass constant;
Starting device carries out the positive rotary pressing processing of Small Taper cylindrical member prefabricated blank 5 by the rotary pressure process parameter set.
In positive spinning process, the effect of the Small Taper coupling barrel blank 3 and 4 contact area of spinning roller in spinning roller 4 It is lower to be plastically deformed, continue thinning and positive elongation.
It is cooled down and is lubricated in spinning process, coolant rate >=200L/min, after processing is completed discharging obtains conelet Spend cylindrical member prefabricated blank 5.
Step 7, Small Taper cylindrical member prefabricated blank makes annealing treatment.Small Taper cylindrical member prefabricated blank 5 is made annealing treatment, and is eliminated Processing hardening phenomenon, the plasticity of restorer reduce subsequent plastic deformation difficulty, prevent cracking phenomena.
The temperature of annealing is 700~740;Soaking time is 70~90min.Cool down after heat preservation with furnace.
Step 8, reversed spinning parameter setting.The spinning machine speed of mainshaft is set as 80~120r/min, axial feed velocity For 80~120mm/min.The Reducing thickness of Small Taper cylindrical member prefabricated blank 5 is set according to the technological requirements.According to the rigidity of spinning machine And the springback capacity of spinning roller 4 determines the spinning gap between 2 working face of spinning roller 4 and mould carcass, to meet processing request.
In the present embodiment, the Reducing thickness of Small Taper cylindrical member prefabricated blank 5 is 4mm.The springback capacity of spinning roller is 0.5mm, therefore is revolved Pressure gap is 1.5mm, 4 drafts 4.5mm of spinning roller.The radial feed speed of spinning roller 4 is 0mm/min, and axial feed velocity is 80mm/min, speed of mainshaft 100r/min.
Step 9, Small Taper cylindrical member prefabricated blank is installed.The Small Taper cylindrical member prefabricated blank 5 is set in mould carcass 2 On, and it is bonded 5 small end inner surface of Small Taper cylindrical member prefabricated blank with 2 small end outer surface of mould carcass, make the conelet at remaining position Spend fit-up gap≤0.15mm between cylindrical member prefabricated blank 5 and 2 working face of mould carcass.
Step 10, reversed rotary pressing processing: radial to keep the spinning gap between spinning roller 4 and 2 working face of mould carcass constant.
Starting device carries out rotary pressing processing to Small Taper cylindrical member prefabricated blank 5 using double rotary wheel synchronous backward spinning.
In reversed spinning process, the Small Taper cylindrical member prefabricated blank 5 is with 4 contact area of spinning roller under the action of spinning roller 4 It is plastically deformed, continues thinning and reversely extends.
It is cooled down and is lubricated in spinning process, coolant rate >=200L/min, after processing is completed discharging obtains conelet Spend the semi-finished product of cylindrical member.
Step 11, subsequent processing: reversed spinning after the test, carries out obtained Small Taper cylindrical member semi-finished product subsequent Processing, obtains Small Taper cylindrical member 6.
In the spinning process of the present embodiment, the wall thickness reduction, length elongation of deformed area Small Taper cylindrical member prefabricated blank 5, The region for crossing spinning and the gap of 2 working face of mould carcass are continuously increased, and constraint reduces, and vibration, whipping phenomenon are occurred, are influenced small The machining accuracy of taper cylindrical member 6.In the present embodiment, by improve assembly precision, make full use of spinning process spinning radial force, The banks that spinning axial force generates realize automatic the characteristics of pre-tightening, effective to reduce Small Taper cylindrical member in spinning process 5 slipping phenomenon of prefabricated blank improves spinning cylindrical member inner surface apparent mass.
The present embodiment can be formed unimach 31Si2MnCrMoVE Small Taper cylindrical member 6, be had by reversed spinning Effect improves the utilization rate of existing equipment, reduces die manufacturing cost, improves production efficiency.

Claims (4)

1. a kind of Small Taper cylindrical member composite spinning processing method, which is characterized in that detailed process is:
Step 1, mould carcass is made:
The mould carcass is hollow revolving body, is divided into construction section and active section;The circumferential surface of the active section is working face;
The working face is the conical surface, and the semi-cone angle of the working face is determined according to formula 1:
In formula: ψ is the semi-cone angle of mould carcass working face;For the semi-cone angle of Small Taper cylindrical member;
There is stair-stepping through-hole at the center of the mould carcass;
The aperture that the through-hole is located at mould carcass construction section one end is greater than the aperture of active section,
Step 2, prepared by Small Taper coupling barrel blank;
Step 3, tooling is installed:
The tooling installation includes installation spinning mold and spinning roller;
I installation spinning mold, the main shaft of mould carcass installation end end surface taper hole and spinning machine in spinning mold is cooperated, and passes through Stud is fastenedly connected;
The installation of II spinning roller, is attacked spinning roller using the spinning roller of R8/30 ° of biconical surface structure using double rotary wheel synchronous backward spin-on process Angle is adjusted to vertical with spinning mold mould carcass song bus, and spinning roller can rotate freely, and guarantees the rotation of roller working radius position One circle, roller working radius Circular Run-out Tolerance≤0.15mm;
Step 4, positive spinning parameter setting:
The spinning machine speed of mainshaft is 80~120r/min, and axial feed velocity is 80~120mm/min,;It sets according to the technological requirements Determine the Reducing thickness of Small Taper coupling barrel blank;Spinning roller and mould carcass are determined according to the springback capacity of the rigidity of spinning machine and spinning roller Spinning gap between working face;
Step 5, spinning blank is installed:
The Small Taper coupling barrel blank is set on mould carcass, and makes table in Small Taper coupling barrel blank small end Face is bonded with mould carcass small end outer surface;
Step 6, positive rotary pressing processing:
It is radial to keep the spinning gap between spinning roller and mould carcass working face constant;Conelet is carried out by the rotary pressure process parameter of setting Spend cylindrical member prefabricated blank forward direction rotary pressing processing;It is cooled down and is lubricated in spinning process, coolant rate >=200L/min, processing Discharging after the completion obtains Small Taper cylindrical member prefabricated blank;
Step 7, make annealing treatment: Small Taper cylindrical member prefabricated blank is made annealing treatment;The temperature of annealing is 700~740 DEG C; Soaking time is 70~90min;Cool down after heat preservation with furnace;
Step 8, reversed spinning parameter setting:
The spinning machine speed of mainshaft is set as 80~120r/min, axial feed velocity is 80~120mm/min;According to the technological requirements Set the Reducing thickness of Small Taper cylindrical member prefabricated blank;Spinning roller and mould carcass are determined according to the springback capacity of the rigidity of spinning machine and spinning roller Spinning gap between working face;
Step 9, Small Taper cylindrical member prefabricated blank is installed:
The Small Taper cylindrical member prefabricated blank is set on mould carcass, and make Small Taper cylindrical member prefabricated blank small end inner surface with The fitting of mould carcass small end outer surface, makes the assembly building between the Small Taper cylindrical member prefabricated blank at remaining position and mould carcass working face Gap≤0.15mm;
Step 10, reversed rotary pressing processing:
It is radial to keep the spinning gap between spinning roller and mould carcass working face constant;Using double rotary wheel synchronous backward spinning to conelet It spends cylindrical member prefabricated blank and carries out rotary pressing processing;It is cooled down and is lubricated in spinning process, coolant rate >=200L/min;It obtains The semi-finished product of Small Taper cylindrical member;
Step 11, subsequent processing:
Reversed spinning carries out subsequent processing after the test, to obtained Small Taper cylindrical member semi-finished product, obtains Small Taper tubular Part.
2. Small Taper cylindrical member composite spinning processing method as described in claim 1, which is characterized in that the construction section is located at work Make big outer diameter one end of section;And the inner surface in the mould carcass construction section end face aperture is the conical surface;In the construction section end face It is evenly equipped with the mounting hole of stud;The conical surface of the construction section inner hole and the excircle cone match of spinning machine main shaft.
3. Small Taper cylindrical member composite spinning processing method as described in claim 1, which is characterized in that the small outer diameter of mould carcass Small 20~the 30mm of internal diameter at the outer diameter at end outer diameter end smaller than Small Taper cylindrical member adds the surplus of trimming as examination rotation processing and machine.
4. Small Taper cylindrical member composite spinning processing method as described in claim 1, which is characterized in that the Small Taper cylindrical member Spinning blank inner surface is the conical surface, and the semi-cone angle θ of the conical surface is determined according to formula 2:
θ=(1.5~2) ψ 2
In formula: θ is the semi-cone angle of Small Taper coupling barrel blank;ψ is the semi-cone angle of mould carcass working face.
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