CN106392499A - Equal-wall thickness curve generatrix part precise molding method - Google Patents
Equal-wall thickness curve generatrix part precise molding method Download PDFInfo
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- CN106392499A CN106392499A CN201611093566.9A CN201611093566A CN106392499A CN 106392499 A CN106392499 A CN 106392499A CN 201611093566 A CN201611093566 A CN 201611093566A CN 106392499 A CN106392499 A CN 106392499A
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- wall thickness
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/14—Spinning
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention discloses an equal-wall-thickness curve generatrix part precise molding method, and belongs to the technical field of precise plastic machining. The method includes the following steps that (1) a machining process is adopted for obtaining a variable-wall-thickness taper blank; (2) a strong cold spinning process is adopted for completing molding of a front part of a part; (3) a strong common heat spinning process is adopted for completing molding of a back part of the part; and (4) according to the drawing requirement, follow-up machining is completed to obtain the part. The spinning method is used for forming the equal-wall-thickness curve generatrix part, and the beneficial effects of being high in product strength, high in accuracy, simple in operation, high in production efficiency and good in product consistency, improving the organization and machine performance of the molded part and the like are achieved.
Description
Technical field
The present invention relates to accurate Technology of Plastic Processing field, the more particularly, to wall thickness such as one kind song bus part Accurate Shaping side
Method.
Background technology
Bent bus part is the common part of one of machine-building, increasingly wide with its application of scientific and technical development
General, it is related to many applications such as Aeronautics and Astronautics, pressure vessel.
At present, the machining manufacture of bent bus part be mostly coiling welded obtain cone cylinder after pass through bulging again（Metal plate punching,
Inner high voltage etc.）Complete, this technique is primarily present following deficiency：A in () course of processing, part strengthening is less, product strength is relatively
Relatively low, especially commissure strength reduction is more serious；B there is welding stress and welding deformation in () commissure, Product Precision is relatively
Low；C () weld seam detection is relatively complicated, often become the potential risk hidden danger of follow-up test and use；D () operation is more, efficiency
Relatively low, homogeneity of product is also poor.
Spinning is a kind of precision plastic forming processing technique, has been had using the report that spinning process shapes bent bus part
A lot, as the mould pressing of end socket class part, but the operational characteristic due to spinning process, the part generally obtaining is to become wall thickness zero
Part, if the wall thickness requirement such as having, needs to obtain by follow-up machining.
Such as Application No. 201410039773.0, invention entitled " a kind of compound titanium of straight tube-expansion segment that shapes closes
The mould of the wall thickness such as gold song bus thin-walled revolution workpiece component and method ", this patent application is using spinning-extrusion process acquisition etc.
Wall thickness part, and the wall thickness feature that waits of part is to be obtained by extrusion process；, and this patent application belongs to hot forming neck
Domain.
Content of the invention
The purpose of the present invention is that the wall thickness song bus part accurate forming method such as offer one kind, to solve above-mentioned asking
Topic.
To achieve these goals, the technical solution used in the present invention is such：The wall thickness such as one kind song bus part accurately becomes
Shape method, comprises the following steps：
1）Obtained using mechanical processing technique and become wall thickness taper blank；
2）Complete part forward part using strength cold spinning technique to shape；
3）Part rear portion is completed using general hot spinning technique by force and is divided into shape；
4）According to drawing requirement, complete follow-up machining.
As preferred technical scheme：Step 1）In, described charge length is by plastic deformation constancy of volume principle meter
Calculate and Jia 30 on the basis of obtaining～surplus of 40mm.The annealed state that blank condition of heat treatment can directly be supplied for producer；By producing
Product intensity requirement determines passage reduction, thus calculating determination taper blank small end wall thickness, big end wall is thick to pass through blank material pole
Limit reduction inverse determines.
As preferred technical scheme：Step 2）In, the corresponding sotck thinkness of part forward part is inclined with sinusoidal rate calculated wall thickness
Difference is less than 15%, partly corresponds to sotck thinkness and be more than 15% with sinusoidal rate calculated wall thickness deviation after part.I.e. before and after parts to be processed
Partial boundary corresponding blank wall thickness and deviation of sinusoidal rate calculated wall thickness with separation are less than 15% as boundary.
As preferred technical scheme：Step 3）In, the corresponding sotck thinkness of part forward part is inclined with sinusoidal rate calculated wall thickness
Difference is less than 15%, partly corresponds to sotck thinkness and be more than 15% with sinusoidal rate calculated wall thickness deviation after part.
As preferred technical scheme：Step 3）In, blank latter half is carried out add using flame gun or induction coil
Heat, is closed up to blank by multi-process conventional spinning, pastes contour forming eventually through a time strong precession row finishing.Whole process is only
Need one set of die, production efficiency is high, low cost of manufacture.
As preferred technical scheme：Step 4）In, carry out machining mainly for formation of parts termination clout.Processing
Difficulty is extremely low, ultrahigh in efficiency.
Spinning process the wall thickness song bus part such as is applied to and manufactures field by the present invention first, can solve using spinning work
The Key technique problem of the wall thickness song bus part such as skill acquisition.
Compared with prior art, it is an advantage of the current invention that：The present invention utilizes the wall thickness song bus zero such as spin-on process shaping
Part, have product strength height, high precision, simple to operate, production efficiency is high, good product consistency and shape after part tissue
Obtain many advantages, such as improve with mechanical performance.
Brief description
Fig. 1 waits wall thickness song bus part schematic diagram for certain
Fig. 2 waits wall thickness song bus part spinning blank schematic diagram for certain
Fig. 3 waits wall thickness song bus part mould pressing schematic diagram for certain
Fig. 4 waits wall thickness song bus part spinning mandrel schematic diagram for certain
Fig. 5 waits wall thickness song bus part spinning spinning roller schematic diagram for certain
Fig. 6 waits wall thickness song bus part spinning tail top schematic diagram for certain.
Specific embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
The present embodiment is waited as a example wall thickness song bus method for manufacturing parts by certain, elaborates using general combination spinning process by force
Obtain the Key technique problem of such part：
The present embodiment target product material is 5A06, and physical dimension is as shown in figure 1, wherein wall thickness requires δ=3 ± 0.1mm, intensity
Require σs≥309Mpa、σb≥417MPa.In general, Product Precision requirement is higher, and it is strong that product strength is also far above mother metal tension
Degree this index of 315Mpa；
The processing scheme that the present embodiment determines is " machining（Forging stock）- spinning-machining（Finished product）”.Wherein, buying
Forging stock supply of material state is 5A06-O, and raw material standards presses GJB2351-1995 execution.After forging stock machining, before obtaining spinning
Blank is as shown in Fig. 2 the design process of this blank is：1）First, spinning bobbin-type face is determined according to product type face, according to spinning
At mandrel end points, tangential angle determines that taper blank inner mold face cone degree is 7.89 °；2）Secondly, required by product strength, determine
The passage reduction of 5A06 is 30% about, and limit attenuating rate is 50% about, determines that taper blank small end wall thickness is successively
4.25mm, big end wall is thick to be 6.25mm；3）Calculating charge length by Plastic Forming constancy of volume principle is 765mm, reserves and adds
Spare time amount finally takes charge length to be 802mm；
One of difficult point using the wall thickness song bus part such as spinning process shaping is the geometry Design of State of spinning blank, if several
What Design of State is unreasonable, and inhomogeneous deformation in spin-forming procedure will aggravate, and leads to forming process unstable, or even sends out
The defects such as raw part unstability, drawing crack, the present invention passes through many experiments, solves this problem well；
The present embodiment mean wall thickness song bus part mould pressing mould critical component and structure are as shown in figure 3, include spinning core
Axle 1（Fig. 4）, spinning roller 2（Fig. 5）, tail take over a business 3（Fig. 6）.Wherein, spinning mandrel 1 is connected with machine spindle by spindle flange disk,
Spinning roller 2 is connected with rotary wheel base by spinning roller axle, and tail is taken over a business 3 and is connected with equipment tail top by tail top installation set.The present embodiment uses
Equipment be CZX1500/2CNC cnc spinning machine, equipment adopts Siemens's 840D control system, real by servo-drive main shaft
The axial feed motion of existing spinning mandrel 1 and rotation, realize radial direction and the axial feed fortune of spinning roller 2 by servo-drive rotary wheel base
Dynamic, take over a business 3 by driving tailstock hydraulic jack to realize tail and hold out against blank；
Blank is loaded onto after spinning mandrel 1, drives tailstock hydraulic jack to take over a business 3 by tail and hold out against blank.By equipment frock, adjust
Whole spinning roller 2 end-section axis and spinning mandrel 1 central shaft are in 10 ° of angles.
Determined at 850mm for the boundary of product front and back end by calculating contrast blank wall thickness and standard sine rate wall thickness difference
Point, forming process is：1）Before product, 850mm length revolves by force shaping using a time, and in forming process, the speed of mainshaft is 50r/min,
Feed speed is 30mm/min to spinning roller vertically；2）Product latter half adopts 3 passages general precession row to close up, and adopts a time afterwards
Strong precession row finishing patch mould spinning, is heated to blank using flame gun between each passage, heating and temperature control is at 200 DEG C ± 15
DEG C, changed by hand-held infrared radiation thermometer detection temperature；3）General rotation closing in stage each passage blank big end volume under pressure is respectively
10mm, 9mm, 8mm, the speed of mainshaft is 80r/min, and feed speed is 240mm/min to spinning roller vertically；4）Final finishing patch mould rotation
During pressure, the speed of mainshaft is 50r/min, and feed speed is 30mm/min to spinning roller vertically.After shaping, product wall thickness control is 3
±0.1mm；
Finally according to drawing requirement, using lathe, only part two ends are carried out with machining, obtain qualified products.
The present embodiment products obtained therefrom tensile strength by raw material 315MPa about improve to 450MPa, yield strength
By 155MPa about improve to 350MPa, wall thickness tolerance controls in 0.1mm, type face entirety deviation in 0.5mm, product
Concordance is good, and relative with welding bulging process, working (machining) efficiency improves more than 30%.
The present invention is not disclosed technology and belongs to general knowledge as well known to those skilled in the art.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Any modification, equivalent and improvement made within god and principle etc., should be included within the scope of the present invention.
Claims (6)
1. the wall thickness such as one kind song bus part accurate forming method is it is characterised in that comprise the following steps：
1）Obtained using mechanical processing technique and become wall thickness taper blank；
2）Complete part forward part using strength cold spinning technique to shape；
3）Part rear portion is completed using general hot spinning technique by force and is divided into shape；
4）According to drawing requirement, complete follow-up machining, obtain final product.
2. the wall thickness such as one kind according to claim 1 song bus part accurate forming method it is characterised in that：Step 1）
In, described charge length calculated by plastic deformation constancy of volume principle obtain on the basis of Jia 30～surplus of 40mm.
3. the wall thickness such as one kind according to claim 1 song bus part accurate forming method it is characterised in that：Step 2）
In, the corresponding sotck thinkness of part forward part is less than 15% with sinusoidal rate calculated wall thickness deviation, partly correspond to after part sotck thinkness with
Sinusoidal rate calculated wall thickness deviation is more than 15%.
4. the wall thickness such as one kind according to claim 1 song bus part accurate forming method it is characterised in that：Step 3）
In, the corresponding sotck thinkness of part forward part and sinusoidal rate calculated wall thickness deviation are less than 15%, partly correspond to sotck thinkness after part
It is more than 15% with sinusoidal rate calculated wall thickness deviation.
5. the wall thickness such as one kind according to claim 1 song bus part accurate forming method it is characterised in that：Step 3）
In, using flame gun or induction coil, blank latter half is heated, by multi-process conventional spinning, blank is closed up,
Paste contour forming eventually through a time strong precession row finishing.
6. the wall thickness such as one kind according to claim 1 song bus part accurate forming method it is characterised in that：Step 4）
In, carry out machining for formation of parts termination clout.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611093566.9A CN106392499A (en) | 2016-12-02 | 2016-12-02 | Equal-wall thickness curve generatrix part precise molding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611093566.9A CN106392499A (en) | 2016-12-02 | 2016-12-02 | Equal-wall thickness curve generatrix part precise molding method |
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| CN106392499A true CN106392499A (en) | 2017-02-15 |
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| CN201611093566.9A Pending CN106392499A (en) | 2016-12-02 | 2016-12-02 | Equal-wall thickness curve generatrix part precise molding method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111922167A (en) * | 2020-08-19 | 2020-11-13 | 西安航天发动机有限公司 | Hot spinning forming method for variable-wall-thickness extension section of low-density niobium alloy |
| CN115740964A (en) * | 2022-10-10 | 2023-03-07 | 中国兵器科学研究院宁波分院 | Manufacturing method of large-size thin-wall curved bus 5A06 aluminum alloy shell |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111922167A (en) * | 2020-08-19 | 2020-11-13 | 西安航天发动机有限公司 | Hot spinning forming method for variable-wall-thickness extension section of low-density niobium alloy |
| CN115740964A (en) * | 2022-10-10 | 2023-03-07 | 中国兵器科学研究院宁波分院 | Manufacturing method of large-size thin-wall curved bus 5A06 aluminum alloy shell |
| CN115740964B (en) * | 2022-10-10 | 2023-09-15 | 中国兵器科学研究院宁波分院 | Manufacturing method of large-size thin-wall curved bus 5A06 aluminum alloy shell |
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Address after: 610000 Sichuan Chengdu economic and Technological Development Zone (Longquanyi District) 189 Applicant after: Sichuan spaceflight Long March Equipment Manufacturing Co., Ltd. Address before: 610000 No. 189, Yi Du Avenue, Longquanyi District, Chengdu, Sichuan. Applicant before: Changzheng Machinery Factory, China Astronautics Science and Technology Group Co |
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Application publication date: 20170215 |