CN109977561A - A kind of design method of asymmetric double step ring rolling blank dimension - Google Patents

A kind of design method of asymmetric double step ring rolling blank dimension Download PDF

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Publication number
CN109977561A
CN109977561A CN201910246938.4A CN201910246938A CN109977561A CN 109977561 A CN109977561 A CN 109977561A CN 201910246938 A CN201910246938 A CN 201910246938A CN 109977561 A CN109977561 A CN 109977561A
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ring
blank
height
volume
interface
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CN109977561B (en
Inventor
韩学波
齐会萍
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Taiyuan University of Science and Technology
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Taiyuan University of Science and Technology
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H1/00—Making articles shaped as bodies of revolution
    • B21H1/06—Making articles shaped as bodies of revolution rings of restricted axial length
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/20—Design optimisation, verification or simulation

Abstract

The present invention relates to a kind of design methods of asymmetric double step ring rolling blank dimension.The present invention is mainly to solve metal material unreasonable distribution existing for the blank dimension design method of existing special-shaped ring rolling forming technique and the big technical problem of base difficulty.The technical solution adopted by the present invention is that: the design method, the asymmetric double step ring is that the upper and lower outer diameter of step of ring is identical and the different ring of wall thickness of upper and lower step, design procedure are as follows: 1) set at the half of ring groove height as interface, 2) blank is set as the annular blank of one outer step of band and the interface for setting blank interface and ring is contour, 3) calculate ring top bar partial volume Vu, stepped down part partial volume VdWith total volume V0, 4) and according to rolling ratio K, determine blank internal diameter d0, 5) calculate blank lower half portion volume V'd, determine blank small end outside diameter d2, 6) and calculate blank volume V'0, determine blank outer step length l, 7) determine blank outer step outside diameter d1。

Description

A kind of design method of asymmetric double step ring rolling blank dimension
Technical field
The present invention relates to a kind of design methods of asymmetric double step ring rolling blank dimension, it belongs to special-shaped ring and adds Work forming technique field.
Background technique
The design of blank dimension is unusual the key link in special-shaped ring rolling forming technique, it is related to special-shaped ring Can part size expected from rolling forming.Generally for step class abnormity ring, step rolling forming difficulty is big, and Blank Design is abided by Constancy of volume, section phase etc. principle are followed, but for asymmetric double step ring, up and down outer step there are two tools, and step ruler Very little difference is larger, causes to occur due to metal material unreasonable distribution according to volume equal principle design rectangular section blank Bucket step material filling is discontented, short step material stacking phenomenon；And the special-shaped blank of section equal principle design is used, among ring billet It will appear groove, increase base difficulty, do not meet actual production.Therefore, above-mentioned blank design method is not suitable for asymmetric double Step ring rolling forming.
Summary of the invention
Present invention aim to address gold existing for the blank dimension design method of existing special-shaped ring rolling forming technique Belong to material unreasonable distribution and the big technical problem of base difficulty, a kind of asymmetric double step ring rolling blank dimension is provided Design method.
In order to solve the above technical problems, the technical solution adopted by the present invention is that:
A kind of design method of asymmetric double step ring rolling blank dimension, in which: the asymmetric double step ring For the upper and lower outer diameter of step of ring is identical and the different ring of wall thickness of upper and lower step, design procedure are as follows:
1) it sets as interface at the half of ring groove height, ring is divided into ring and is appeared on the stage under exponent part and ring Step part；
2) blank is set as the annular blank of one outer step of band and the interface for setting blank interface and ring is contour, Blank is divided into band between outer land exponent part and without between outer land exponent part, ring is made to appear on the stage exponent part and blank band outer step partial volume Equal, ring part of getting out of a predicament or an embarrassing situation is equal without outer step partial volume with blank, and outside ring top bar axial height and blank Step axial height is equal；
3) ring top bar partial volume V is calculated according to following formulau, stepped down part partial volume VdWith total volume V0
V0=Vu+Vd (3)
In formula: D1For ring top bar outer diameter, H1For ring top bar axial height, D2For ring middle section outer diameter, H2 For ring middle section axial height, D3It gets out of a predicament or an embarrassing situation outer diameter for ring, H3It gets out of a predicament or an embarrassing situation axial height for ring, D0For ring internal diameter, R1For ring chamfering；
4) according to rolling ratio K, blank internal diameter d is determined0
5) the lower half portion volume V ' of blank is calculated according to following formulad, determine blank small end outside diameter d2
In formula: d0For blank internal diameter, h2For blank stratification interface height, h2=H4, H4For ring stratification interface height,
Wherein: V 'd=Vd, then
6) blank volume V ' is calculated according to following formula0, determine blank outer step length l
In formula: h0For the height of blank, h1For blank outer step axial height, R2For blank chamfering,
Wherein: V '0=V0, h1=H1, h0=H0, H0For ring total height, then
7) blank outer step outside diameter d is determined1
d1=2l+d0 (9)。
The invention has the benefit that
Due to present invention determine that blank internal diameter d0, blank small end outside diameter d2, blank outer step length l, blank chamfering R2With The relationship of ring size can rapidly and accurately be calculated all sizes of blank, improve design efficiency；By by ring It is divided into two parts, can achieve the purpose of blank reasonable distribution material；By designing the blank with outer step, ring can solve Top bar is not easy filling problem since step is longer；In addition, entire Blank Design reduces the difficulty of base, material is improved Expect utilization rate, produces save the cost for practical ring.
Detailed description of the invention
Fig. 1 is asymmetric double step ring forging structural schematic diagram of the present invention；
Fig. 2 is the structural schematic diagram of blank of the present invention；
In figure: D0For ring internal diameter, D1For ring top bar outer diameter, D2For ring middle section outer diameter, D3For ring leave from office Rank outer diameter, H1For ring top bar axial height, H2For ring middle section axial height, H3It gets out of a predicament or an embarrassing situation axial height for ring, H4For ring stratification interface height, H0For ring total height, R1For ring chamfering, d0For blank internal diameter, d1For blank outer step outer diameter, d2For blank small end outer diameter, h0For the height of blank, h1For blank outer step axial height, h2For blank stratification interface height, R2For Blank chamfering, l are blank outer step length.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and examples.
The design method of one of the present embodiment asymmetric double step ring rolling blank dimension, in which: such as Fig. 1 institute Show, the asymmetric double step ring is that the upper and lower outer diameter of step of ring is identical and the different ring of wall thickness of upper and lower step Part, design procedure are as follows:
1) because needing groove part metal material to flow during the ring rolling to ring upper and lower ends, therefore ring is set It is interface at the half of groove height, ring is divided into ring appears on the stage exponent part and ring is got out of a predicament or an embarrassing situation part；Make metal Material can flow downward upwards respectively near interface；
2) since top bar needs metal material more, therefore band outer step blank is designed as shown in Fig. 2, increasing blank upper half Partial volume, and axial height is constant before and after ring rolling, and the interface for setting blank interface and ring is contour, by blank It is divided into band between outer land exponent part and without between outer land exponent part, keeps ring exponent part of appearing on the stage equal with outer step partial volume with blank, Ring part of getting out of a predicament or an embarrassing situation is equal without outer step partial volume with blank, and ring top bar axial height and blank outer step axis It is equal to height；
3) ring top bar partial volume V is calculated according to following formulau, stepped down part partial volume VdWith total volume V0
V0=Vu+Vd (3)
In formula: D1For ring top bar outer diameter, H1For ring top bar axial height, D2For ring middle section outer diameter, H2 For ring middle section axial height, D3It gets out of a predicament or an embarrassing situation outer diameter for ring, H3It gets out of a predicament or an embarrassing situation axial height for ring, D0For ring internal diameter, R1For ring chamfering；
4) according to rolling ratio K, blank internal diameter d is determined0
5) the lower half portion volume V ' of blank is calculated according to following formulad, determine blank small end outside diameter d2
In formula: d0For blank internal diameter, h2For blank stratification interface height, h2=H4, H4For ring stratification interface height,
Wherein: V 'd=Vd, then
6) blank volume V ' is calculated according to following formula0, determine blank outer step length l
In formula: h0For the height of blank, h1For blank outer step axial height, R2For blank chamfering,
Wherein: V '0=V0, h1=H1, h0=H0, H0For ring total height, then
7) blank outer step outside diameter d is determined1
d1=2l+d0 (9)。
Below by a case history, the present invention will be further described.
As shown in Figure 1, 2, ring forging's block dimension are as follows: D1=473mm, D2=374mm, D3=415mm, H1=45mm, H2= 127mm, H3=40mm, D0=304mm, R1=R2=20mm.
1. ring top bar partial volume V is calculated according to above-mentioned formula (1), (2) and (3)u, stepped down part partial volume VdWith total volume V0:
Vu=7060786.446mm3, Vd=4927075.657mm3, V0=11987862.103mm3；
2. selecting rolling ratio K=1.52, blank internal diameter d is calculated according to formula (4)0=200mm；
3. obtaining blank small end outside diameter d according to formula (5) and (6)2=317.19mm；
4. obtaining blank length of bench l=36.97mm according to formula (7) and (8)；
5. obtaining blank outer step outside diameter d according to formula (9)1=391.13mm.
The invention is not limited to above embodiment, if not departing from the present invention to various changes or modifications of the invention Spirit and scope, if these modification and variations belong within the scope of claim and equivalent technologies of the invention, then this hair Bright also includes these modification and variations.

Claims (1)

1. a kind of design method of asymmetric double step ring rolling blank dimension, it is characterised in that: the asymmetric double step Ring is that the upper and lower outer diameter of step of ring is identical and the different ring of wall thickness of upper and lower step, design procedure are as follows:
1) it sets as interface at the half of ring groove height, ring is divided into ring appears on the stage exponent part and ring is got out of a predicament or an embarrassing situation Part；
2) blank is set as the annular blank of one outer step of band and the interface for setting blank interface and ring is contour, by hair Base is divided into band between outer land exponent part and without between outer land exponent part, and ring is made to appear on the stage exponent part and blank with outer step partial volume phase It is equal without outer step partial volume with blank Deng, ring part of getting out of a predicament or an embarrassing situation, and ring top bar axial height and blank between outer land Rank axial height is equal；
3) ring top bar partial volume V is calculated according to following formulau, stepped down part partial volume VdWith total volume V0
V0=Vu+Vd (3)
In formula: D1For ring top bar outer diameter, H1For ring top bar axial height, D2For ring middle section outer diameter, H2For ring Part middle section axial height, D3It gets out of a predicament or an embarrassing situation outer diameter for ring, H3It gets out of a predicament or an embarrassing situation axial height for ring, D0For ring internal diameter, R1For Ring chamfering；
4) according to rolling ratio K, blank internal diameter d is determined0
5) the lower half portion volume V ' of blank is calculated according to following formulad, determine blank small end outside diameter d2
In formula: d0For blank internal diameter, h2For blank stratification interface height, h2=H4, H4For ring stratification interface height,
Wherein: V 'd=Vd, then
6) blank volume V ' is calculated according to following formula0, determine blank outer step length l
In formula: h0For the height of blank, h1For blank outer step axial height, R2For blank chamfering,
Wherein: V '0=V0, h1=H1, h0=H0, H0For ring total height, then
7) blank outer step outside diameter d is determined1
d1=2l+d0 (9)。
CN201910246938.4A 2019-03-29 2019-03-29 Design method for rolling blank size of asymmetric double-step ring piece Active CN109977561B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111318630A (en) * 2020-03-18 2020-06-23 武汉理工大学 Near-net composite rolling forming method for inner ring of tapered roller bearing
CN112453293A (en) * 2020-11-04 2021-03-09 中国航发南方工业有限公司 Rolling method of special-shaped ring with L-shaped section

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CN101829686A (en) * 2010-05-06 2010-09-15 西北工业大学 Method for determining dimensions of ring radially-axially rolled blank
CN102886473A (en) * 2012-08-31 2013-01-23 太原科技大学 Method for determining dimension of ring casting-rolling combined formed blank
CN102873511A (en) * 2012-09-29 2013-01-16 山东建筑大学 Method for radially rolling and forming ring piece with three steps and complicated section
CN104475631A (en) * 2014-11-10 2015-04-01 太原科技大学 Size determination method of blanks of casting and rolling compound forming deep-barrel-shaped ring parts
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CN109500333A (en) * 2019-01-16 2019-03-22 山东大学 A kind of large ring reaming forging forming method with inward flange

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111318630A (en) * 2020-03-18 2020-06-23 武汉理工大学 Near-net composite rolling forming method for inner ring of tapered roller bearing
CN111318630B (en) * 2020-03-18 2021-07-20 武汉理工大学 Near-net composite rolling forming method for inner ring of tapered roller bearing
CN112453293A (en) * 2020-11-04 2021-03-09 中国航发南方工业有限公司 Rolling method of special-shaped ring with L-shaped section
CN112453293B (en) * 2020-11-04 2022-06-07 中国航发南方工业有限公司 Rolling method of special-shaped ring with L-shaped section

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