CN107442725B - Swage inside and outside circularity quality and avoiding of no plug is swaged the control method of folding - Google Patents
Swage inside and outside circularity quality and avoiding of no plug is swaged the control method of folding Download PDFInfo
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- CN107442725B CN107442725B CN201710812995.5A CN201710812995A CN107442725B CN 107442725 B CN107442725 B CN 107442725B CN 201710812995 A CN201710812995 A CN 201710812995A CN 107442725 B CN107442725 B CN 107442725B
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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
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
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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
- B21J9/00—Forging presses
- B21J9/10—Drives for forging presses
- B21J9/20—Control devices specially adapted to forging presses not restricted to one of the preceding subgroups
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/06—Making machine elements axles or shafts
- B21K1/12—Making machine elements axles or shafts of specially-shaped cross-section
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Abstract
The present invention relates to a kind of swage inside and outside circularity quality and avoiding of no plug to swage the control method of folding, the steps include: that (1) determines the maximum radial amount of feeding according to no plug critical collapsed shape of inside and outside circle of swaging；(2) the smallest radial amount of feeding is determined according to no plug inside and outside circularity quality of swaging；(3) it is determined according to minimum and maximum radial feeds and is swaged radial feed passage without plug；(4) circumferential optimum feed amount and circle-feeding period are determined according to critical strain shape and inside and outside circularity quality；(5) improve situation according to no plug inside and outside circularity quality of swaging and determine circle-feeding passage；(6) it determines and swages the radially and circumferentially feeding order of folding without swage inside and outside circularity quality and avoiding of plug.It feeds parameter without plug radially and circumferentially technique of swaging by control and swages meeting no plug and inside and outside circularity quality and avoid fold defect of swaging, improve fatigue strength and the fatigue life of axis product of swaging.
Description
Technical field
The present invention relates to a kind of swage inside and outside circularity quality and avoiding of no plug to swage the control method of folding, and especially one
Kind is swaged for the hollow central siphon that variable-section variable wall thickness bears complex load to be shaped inside and outside circularity quality control and avoids folding of swaging
Folded powder injection molding belongs to no plug and swages inside and outside circularity quality control technology.
Background technique
Technique of swaging has that continuous fibre flow, shaping surface is high-quality, be easily formed variable-section variable thickness structure, effect
The advantages such as rate height, stock utilization height, be most advanced, technical level in car transmission shaft manufacture and barrel manufacture it is highest at
One of shape method.Axis of swaging forming of swaging includes that the undergauges of the wall thickness such as the cross-section containing plug subtracts wall thickness drawing forming process and nothing
Plug variable-section variable wall thickness undergauge increases wall thickness Radial Flow process.Rotary swaging process containing plug due to inside and outside the support blank of plug by
Pressure, almost T-stable is easily guaranteed that, swages the general single pass of radial feed containing plug.No plug swage blank outer surface be pressurized, it is interior
Surface tension and it is natural shaped, variable-section variable wall thickness structure can be shaped, swage containing plug and efficiency and swage to guarantee to swage
Almost T-stable, no plug are usually that radial feeds are presented the multi-pass radial feed that successively decreases, and radial feed and it is circumferential into
Row staggeredly carries out.No plug swage radial feed when, blank mainly generates radial metal flow, the primarily radial deformation of blank,
Axial direction metal flow when the shape of mold can prevent to swage.
Swage axis without plug swage inside and outside circularity quality and avoiding swage folding control method be by control it is radial into
It is realized to passage, the maximum radial amount of feeding, the smallest radial amount of feeding, best circle-feeding amount and circle-feeding passage.Work as nothing
Plug is swaged, and inside and outside deviation from circular from occur excessive, especially occur swaging fold defect when, it is subsequent swage can aggravate to fold it is existing
As a result will lead to the fatigue strength and fatigue life sharp fall of axis of swaging, it is difficult to meet durability of product requirement.Cause
This, needs to design one kind axis of swaging and swages without plug and inside and outside circularity quality and avoided folding control method, swaged by no plug
Radial feed technological parameter is controlled, and no plug, which is swaged, feeds technological parameter mainly and include the maximum radial amount of feeding, most
Small radial feeds, radial feed passage, best circle-feeding amount and circle-feeding road are inferior.
Summary of the invention
The present invention is to provide for a kind of swage inside and outside circularity quality and avoiding of no plug and swages the control method of folding, utilizes
Swaging without plug for establishing and is swaged the internal relation between inside and outside circularity and critical folding without plug at technique feeding parameter, is passed through
Control without plug swages technique feeding parameter to realize that no plug is swaged and inside and outside circularity quality and avoid folding control, and then improves
Swage axis product fatigue strength and fatigue life.
To achieve the above object, it inside and outside circularity quality and avoids revolving the technical scheme is that a kind of no plug is swaged
The control method folded is forged, the steps include:
(1) the maximum radial amount of feeding is determined according to no plug critical collapsed shape of inside and outside circle of swaging
No plug swage the critical collapsed shape of inside and outside circle be swage deformation convex and spill boundary shape, in mold, base
In the case that material and material determine, with being continuously increased for radial feeds, blank deformation of swaging is presented by justifying --- to convex
Shape --- arrive critical shape --- arrives three kinds of shapes of spill again, with PLASTIC FINITE ELEMENT ANALYSIS emulation mode, by studying and calculating centreless
The deformed shape and deformation behaviour that stick is swaged, emulation obtain no plug swage inside and outside circle be in swage critical geometry when most
It swages greatly deflection and the corresponding relationship swaged between the critical radial feeds of geometry without plug；
(2) the smallest radial amount of feeding is determined according to no plug inside and outside circularity quality of swaging
The inside and outside circularity quality that no plug is swaged is the radius of inside and outside circle deforms after swaging feeding inscribed circle and circumcircle
Difference, with elastoplasticity emulation mode, inside and outside circularity quality is equal to feeding when swaging axis inside and outside circle design tolerance under radial feed
Amount is swaged the minimum progress amount of feeding of inside and outside circularity quality without plug as meeting；
(3) it is determined according to the maximum radial amount of feeding and the smallest radial amount of feeding and is swaged radial feed passage without plug
In the identical situation of mold, the progress swaged with no plug, the maximum radial amount of feeding with blank outer diameter not
Break and reduce and change, with PLASTIC FINITE ELEMENT ANALYSIS emulation mode, simplifies reality without plug radial feed process, according to blank ruler
Very little reduction carries out segmentation radial feed, i.e., the single pass maximum radial amount of feeding within the scope of certain billet size is identical, single
The feeding of passage maximum radial measures the minimum in the maximum radial amount of feeding group for generating critical strain of swaging in this section of size range
Value, such feeding mode not only simplifies radial feed movement, and can guarantee that radial feed process will not generate folding of swaging
Folded defect；The ratio between every section of size range of blank and this section of maximum radial amount of feeding are the minimum radial feed road under this section of size
It is secondary, determine that without the swage purpose of radial feed passage of plug be to avoid nothing according to the maximum radial amount of feeding and the smallest radial amount of feeding
It is excessive and generate and swage folding and circularity quality problems to occur radial feed in plug rotary swaging process；Simultaneously can to avoid radial direction into
There is inefficiency problem of swaging to too small；
(4) best circle-feeding amount and circle-feeding period are determined according to critical strain shape and inside and outside circularity quality
No plug rotary swaging process is one successively radially with circle-feeding process, and the maximum radial amount of feeding swaged by critical
The influence of deformed shape and inside and outside circularity quality, circle-feeding amount are determined according to radial feed deformed shape, it is circumferential into
The purpose given is to ensure that subsequent radial feed will not exacerbated critical strain shape and inside and outside circularity quality；It is circumferential most preferably into
It is to guarantee that subsequent radial maximum distortion occurs at the minimum position of previous radial deformation to amount；The circle-feeding period can root
It is determined according to mold and blank structure symmetry and deformation of swaging；
(5) improve situation according to no plug inside and outside circularity quality of swaging and determine circle-feeding passage
No plug inside and outside circle circularity quality of swaging can be improved by multiple circle-feeding, be emulated with PLASTIC FINITE ELEMENT ANALYSIS
Method, by different circle-feeding passages, emulation obtains no plug and swages inside and outside circle circularity quality improvement degree to determine week
To feeding passage；
(6) it determines and swages the radially and circumferentially feeding order of folding without swage inside and outside circularity quality and avoiding of plug
In order to meet the inside and outside circularity quality in no plug rotary swaging process, the deformation that avoids swaging surmount swage critical strain into
Enter to concave shape and generate fold defect of swaging, needs to formulate the radially and circumferentially feeding order that no plug is swaged.Without plug
The radially and circumferentially feeding order swaged is that circle-feeding is carried out under identical radial feed, the inside and outside circularity quality swaged
After improvement, then carry out lower passage radial feed and circle-feeding.
In step (1), for 37mm, internal diameter 27mm emulates to obtain nothing by PLASTIC FINITE ELEMENT ANALYSIS the blank outer diameter used
Inside and outside circle geometry when plug radial direction diameter to amount is 0.55mm is about the critical collapsed shape of inside and outside circle, and no plug is swaged inside and outside
The maximum radial amount of feeding of the critical collapsed shape of circle is 0.55mm.
In step (2), pass through multiple finite element simulation, when radial feeds are 0.1mm, inside and outside circle circularity quality of swaging
Within the scope of defined tolerance 0.08mm, no plug inside and outside circularity quality of swaging determines that the smallest radial amount of feeding is 0.1mm.
In step (4), the best circle-feeding amount of original blank is 45 °；Original blank is round material, is in symmetry, swages
Four, mold, in 90 ° of distributions, the multiple that the best circle-feeding amount period of swaging is 45 °.
The beneficial effects of the present invention are:
It is of the invention to swage the control method of folding without swage inside and outside circularity quality and avoiding of plug, it is swaged by no plug
Radial feed technological parameter is controlled, and no plug, which is swaged, feeds technological parameter mainly and include the maximum radial amount of feeding, most
Small radial feeds, radial feed passage, best circle-feeding amount and circle-feeding road are inferior.Utilize swaging without plug for foundation
It technique feeding parameter and swages the internal relation between inside and outside circularity and critical folding without plug, is swaged work by control without plug
Skill feeds parameter to realize that no plug is swaged and inside and outside circularity quality and avoid folding control, and then improves the fatigue for axis product of swaging
Intensity and fatigue life.
Detailed description of the invention
Fig. 1 swages feeding process, mold and blank contact condition figure for no plug；
(a) main view, (b) side view, (c) mold and blank contact condition；
Fig. 2 is that the typical inside and outside circle of original blank is swaged deformed shape；
(a) convex, (b) critical shape, (c) spill；
Fig. 3 is different circle-feeding number and inner surface circularity relational graph；
Fig. 4 is that swage inside and outside circularity quality and avoiding of no plug of the invention is swaged the control method flow diagram of folding.
Specific embodiment
The invention will be further described with embodiment with reference to the accompanying drawing.
Example: it is swaged with certain car constant-speed Universal drive jackshaft as object, material 25CrMo4, it is by cross-section etc.
The seamless steel pipe of wall thickness is fabricated by no plug and swaging containing plug.Without in plug rotary swaging process, 4 petals tool, 1 radial direction is transported
Dynamic to forge blank 2, variable-section variable wall thickness is determined by mould structure, and blank 2 does circumferential movement and carries out circle-feeding, radial feed and
Circle-feeding alternately, swage feeding process and die structure dwg such as Fig. 1 (a) by no plug, (b), (c) shown in.
Swage axis original blank be the wall thickness such as cross-section seamless steel pipe, outer diameter 37mm, wall thickness 5mm, minor axis length
For 357mm.The material property of blank is that yield strength is small less than 630MPa, surface hardness less than 400MPa, tensile strength respectively
In 190HV.
Swage inside and outside circularity quality and avoiding of no plug is swaged the control method of folding, as shown in figure 4, including following step
It is rapid:
1, the maximum radial amount of feeding is determined according to no plug critical collapsed shape of inside and outside circle of swaging
In no plug rotary swaging process, the material property of the maximum radial amount of feeding and blank, the structure snd size of blank, mould
The structure snd size of tool are closely related, in order to improve efficiency using biggish radial feed.But no plug is swaged radial feed mistake
Greatly, it swages when being deformed into spill, subsequent swage will appear Fold of swaging；No plug swages radial feed where appropriate, swaging
When being deformed into convex, subsequent swage is not in fold defect of swaging.The convex of deformation of swaging and spill boundary shape are centreless
Stick is swaged the critical collapsed shape of inside and outside circle, in the case where mold, blank and material determine, with the continuous increasing of radial feeds
Adding, --- to convex --- to critical shape --- is presented by justifying again to three kinds of shapes of spill in blank deformation of swaging, such as Fig. 2 (a),
(b), shown in (c), in order to observe conveniently in figure, deformation of swaging is exaggerated 10 times.
It swages when being deformed into convex and critical shape, will not swage folding；It swages when being deformed into spill, subsequent meeting of swaging
It swages folding, and cannot be repaired.The no plug critical collapsed shape of inside and outside circle of swaging is only related to radial feed.This hair
It is bright to propose to use PLASTIC FINITE ELEMENT ANALYSIS emulation mode, by studying and calculating the deformed shape and deformation behaviour that no plug is swaged, imitate
No plug maximum that inside and outside circle is in when swaging critical geometry of swaging really is obtained to swage and deflection and swage geometry without plug
Corresponding relationship between critical radial feeds；
For this example, blank outer diameter 37mm, internal diameter 27mm, PLASTIC FINITE ELEMENT ANALYSIS emulate to obtain this example without plug radial direction diameter to
Inside and outside circle geometry when amount is 0.55mm is about the critical collapsed shape of inside and outside circle.Therefore, this example is swaged inside and outside circle without plug
The maximum radial amount of feeding of critical collapsed shape is 0.55mm.
2, the smallest radial amount of feeding is determined according to no plug inside and outside circularity quality of swaging
The smallest radial amount of feeding that no plug is swaged influences efficiency of swaging, and the smallest radial amount of feeding is smaller, and efficiency of swaging is got over
It is low.The smallest radial amount of feeding under theoretically swaging without plug is that blank only generates flexible deformation without plasticity in rotary swaging process
The maximum radial amount of feeding of deformation.The inside and outside circularity quality that no plug is swaged be swage feeding after inside and outside circle deform inscribed circle and
The difference of the radius of circumcircle, the circularity quality that no plug is swaged can be partially removed by multiple circle-feeding.
The present invention propose when being equal to inside and outside circularity design tolerance without circularity quality inside and outside under plug radial feed it is radial into
Referred to as guarantee the minimum amount of feeding of circularity quality inside and outside swaging without plug to amount, can occur under the smallest radial amount of feeding certain
Plastic deformation, and inside and outside circularity quality can be further increased by multiple circle-feeding.In view of elastic-plastic deformation and rotation
Circularity quality of swaging is improved in the circumferential repeatedly feeding part of forging, theoretically solves the smallest radial amount of feeding by inside and outside circle circularity quality
It is extremely difficult, or even can not.Present invention proposition passes through elastoplasticity emulation mode, and inside and outside circularity quality is equal to rotation under radial feed
Amount of feeding when forging axis inside and outside circle design tolerance is swaged the minimum progress amount of feeding of inside and outside circularity quality without plug as meeting.
It is 0.1mm when radial feed passes through by finite element simulation if circularity quality tolerance is 0.08mm for this example
When, inside and outside circle circularity of swaging quality is within prescribed tolerances.Therefore, this example swages inside and outside circularity quality determination most without plug
Small radial feeds are 0.1mm.
3, it is determined according to the maximum radial amount of feeding and the smallest radial amount of feeding and is swaged radial feed passage without plug
Determined according to the maximum radial amount of feeding and the smallest radial amount of feeding is without the swage purpose of radial feed passage of plug
It avoids occurring the excessive generation folding of radial feed and circularity quality problems in no plug rotary swaging process, avoid radial feed too small out
Inefficiency of now swaging problem.The progress swaged with no plug, material property, the blank structure size of blank can all become
Change, no plug swage the critical collapsed shape of inside and outside circle can with the structure size of blank change and change.No plug is swaged radial direction
The determination of feeding passage is to guarantee do not occur critical collapsed shape without plug inside and outside circle of swaging in any case.Due to solving root
According to the maximum radial amount of feeding and the smallest radial amount of feeding determine without plug swage radial feed passage theory solve it is extremely difficult,
Even can not.The present invention propose to pass through PLASTIC FINITE ELEMENT ANALYSIS emulation mode and simplify it is practical without plug radial feed process,
Segmentation radial feed is carried out according to the reduction of billet size, i.e., the single pass maximum radial feeding within the scope of certain billet size
Measure identical, the interior maximum radial amount of feeding group for generating critical strain of swaging of single pass maximum radial feeding this section of size range of measurement
In minimum value.Such feeding mode not only simplifies radial feed movement, and can guarantee that radial feed process will not produce
Raw fold defect of swaging.The ratio between every section of size range of blank and this section of maximum radial amount of feeding are the minimum diameter under this section of size
To feeding passage.
This example is led to according to the maximum radial amount of feeding 0.55mm and smallest radial amount of feeding 0.1mm under original blank
It crosses elastic and plastic finite element method, determines the radial feeds and radial direction of the quality that guarantees to swage without plug, the folding that avoids swaging
It is as shown in table 1 to feed passage.
Table 1 is swaged radial feed technological parameter without plug
4, best circle-feeding amount and circle-feeding period are determined according to critical strain shape and inside and outside circularity quality
No plug rotary swaging process is one successively radially with circle-feeding process, and the maximum radial amount of feeding swaged by critical
The influence of deformed shape and inside and outside circularity quality, circle-feeding amount are determined according to radial feed deformed shape, it is circumferential into
The purpose given is to ensure that subsequent radial feed will not exacerbated critical strain shape and inside and outside circularity quality.It is circumferential most preferably into
It is that subsequent radial maximum distortion occurs at the minimum position of previous radial deformation to amount；The circle-feeding period can be according to mold
It is determined with blank structure symmetry and deformation of swaging.
For this example, no plug is swaged deformation such as the convex or critical shape in Fig. 2, the purpose of circle-feeding after radial feed
Ensure subsequent radial feed maximum distortion occur last time swage deformation minimum position at, for this example original blank
Best circle-feeding amount is 45 °；Original blank is round material, is in symmetry, swages 4, mold, in 90 ° of distributions, is swaged best week
The multiple for being 45 ° to the amount of feeding period.
5, improve situation according to no plug inside and outside circularity quality of swaging and determine circle-feeding passage
No plug inside and outside circle circularity quality of swaging can be improved by multiple circle-feeding, excessive circle-feeding passage
No plug can not be infinitely improved to swage inside and outside circularity quality.Improve situation and really without plug inside and outside circularity quality of swaging due to solving
The theory solution for determining circle-feeding passage is extremely difficult, or even can not.Present invention proposition passes through PLASTIC FINITE ELEMENT ANALYSIS emulation side
Method, by different circle-feeding passages, emulation obtains no plug and swages inside and outside circle circularity quality improvement degree to determine circumferential direction
Feed passage.
For this example, PLASTIC FINITE ELEMENT ANALYSIS is emulated under different circle-feeding passages, and no plug is swaged typical inner circle circularity matter
It is as shown in Figure 3 that amount improves situation.When by 1 circle-feeding, the improvement of interior circularity quality is fairly obvious；2 circle-feedings
Although circularity quality still has improvement, improvement is little；The circle-feeding circularity quality of 3 times and more multi-pass no longer becomes substantially
Change.The circle-feeding passage of this example takes 2 passages.
6, it swages the radially and circumferentially feeding order of folding without swage inside and outside circularity quality and avoiding of plug
In order to meet the inside and outside circularity quality in no plug rotary swaging process, the deformation that avoids swaging surmount swage critical strain into
Enter to concave shape and generate fold defect of swaging, needs to formulate the radially and circumferentially feeding order that no plug is swaged.Without plug
The radially and circumferentially feeding order swaged is that circle-feeding is carried out under identical radial feed, and the inside and outside circularity quality swaged changes
It deals with problems arising from an accident, is carrying out lower passage radial feed and circle-feeding.
It is as follows with the first segment outer diameter 37mm feeding process to outer diameter 31mm of swaging for this example:
Outer diameter 37mm --- radial feed 0.5mm --- 45 ° of circle-feeding --- 45 ° of circle-feeding --- outer diameters
36mm --- radial feed 0.5mm --- 45 ° of circle-feeding --- 45 ° of circle-feeding --- outer diameter 35mm --- radial feeds
0.5mm --- 45 ° of circle-feeding --- 45 ° of circle-feeding --- outer diameter 34mm --- radial feed 0.5mm --- circle-feedings
45 ° of --- 45 ° of circle-feeding --- outer diameter 33mm --- --- 45 ° of circle-feeding --- circle-feedings of radial feed 0.5mm
45 ° of --- outer diameter 32mm --- radial feed 0.5mm --- 45 ° of circle-feeding --- 45 ° of circle-feeding --- outer diameter 31mm.
Claims (4)
1. a kind of no plug is swaged, inside and outside circularity quality and avoiding is swaged the control method of folding, which is characterized in that the steps include:
(1) the maximum radial amount of feeding is determined according to no plug critical collapsed shape of inside and outside circle of swaging
No plug swage the critical collapsed shape of inside and outside circle be swage deformation convex and spill boundary shape, mold, blank and
In the case that material determines, with being continuously increased for radial feeds, blank swages deformation presentation by justifying --- to convex ---
To critical shape --- three kinds of shapes of spill are arrived again, with PLASTIC FINITE ELEMENT ANALYSIS emulation mode, are swaged by studying and calculating no plug
Deformed shape and deformation behaviour, emulation obtain no plug swage inside and outside circle be in swage critical geometry when maximum swage
Deflection and the corresponding relationship swaged between the critical radial feeds of geometry without plug；
(2) the smallest radial amount of feeding is determined according to no plug inside and outside circularity quality of swaging
The inside and outside circularity quality that no plug is swaged is the difference of the radius of inside and outside circle deforms after swaging feeding inscribed circle and circumcircle,
With elastoplasticity emulation mode, inside and outside circularity quality is equal to amount of feeding conduct when swaging axis inside and outside circle design tolerance under radial feed
Meet and carries out the amount of feeding without plug the minimum of inside and outside circularity quality of swaging；
(3) it is determined according to the maximum radial amount of feeding and the smallest radial amount of feeding and is swaged radial feed passage without plug
In the identical situation of mold, the progress swaged with no plug, the maximum radial amount of feeding constantly subtracts with blank outer diameter
It changes less；With PLASTIC FINITE ELEMENT ANALYSIS emulation mode, simplify reality without plug radial feed process, according to billet size
Reduction carries out segmentation radial feed, i.e., the single pass maximum radial amount of feeding within the scope of certain billet size is identical, single pass
Maximum radial feeding measures the minimum value in the maximum radial amount of feeding group for generating critical strain of swaging in this section of size range, this
The feeding mode of sample not only simplify radial feed movement, and can guarantee radial feed process will not generate swage fold it is scarce
It falling into, the ratio between every section of size range of blank and this section of maximum radial amount of feeding are the minimum radial feed passage under this section of size,
Determine that without the swage purpose of radial feed passage of plug be to avoid centreless according to the maximum radial amount of feeding and the smallest radial amount of feeding
It is excessive and generate and swage folding and circularity quality problems to occur radial feed in stick rotary swaging process；It simultaneously can be to avoid radial feed
It is too small inefficiency problem of swaging occur；
(4) circumferential optimum feed amount and circle-feeding period are determined according to critical strain shape and inside and outside circularity quality
No plug rotary swaging process is one successively radially with circle-feeding process, and the maximum radial amount of feeding is by critical deformation of swaging
The influence of shape and inside and outside circularity quality, circle-feeding amount are determined according to radial feed deformed shape, circle-feeding
Purpose is to ensure that subsequent radial feed will not exacerbated critical strain shape and inside and outside circularity quality；Circumferential optimum feed amount
It is to guarantee that subsequent radial maximum distortion occurs at the minimum position of previous radial deformation；The circle-feeding period can be according to mould
Tool and blank structure symmetry and deformation of swaging determine；
(5) improve situation according to no plug inside and outside circularity quality of swaging and determine circle-feeding passage
No plug inside and outside circle circularity quality of swaging can be improved by multiple circle-feeding, with PLASTIC FINITE ELEMENT ANALYSIS emulation side
Method, by different circle-feeding passages, emulation obtains no plug and swages inside and outside circle circularity quality improvement degree to determine circumferential direction
Feed passage；
(6) it determines and swages the radially and circumferentially feeding order of folding without swage inside and outside circularity quality and avoiding of plug
In order to meet the inside and outside circularity quality requirement in no plug rotary swaging process, the deformation that avoids swaging surmount swage critical strain into
Enter to concave shape and generate fold defect of swaging, needs to formulate the radially and circumferentially feeding order that no plug is swaged, no plug
The radially and circumferentially feeding order swaged is that circle-feeding is carried out under identical radial feed, and the inside and outside circularity quality swaged changes
It deals with problems arising from an accident, then carries out lower passage radial feed and circle-feeding.
2. no plug according to claim 1 is swaged, inside and outside circularity quality and avoiding is swaged the control method of folding, special
Sign is: in step (1), for 37mm, internal diameter 27mm emulates to obtain centreless by PLASTIC FINITE ELEMENT ANALYSIS the blank outer diameter used
Inside and outside circle geometry when stick radial direction diameter to amount is 0.55mm is the critical collapsed shape of inside and outside circle, and no plug inside and outside circle of swaging faces
The maximum radial amount of feeding of boundary's collapsed shape is 0.55mm.
3. no plug according to claim 1 is swaged, inside and outside circularity quality and avoiding is swaged the control method of folding, special
Sign is: in step (2), by multiple finite element simulation, when radial feed is 0.1mm, inside and outside circle circularity quality of swaging exists
Within the scope of defined tolerance 0.08mm, no plug inside and outside circularity quality of swaging determines that the smallest radial amount of feeding is 0.1mm.
4. no plug according to claim 1 is swaged, inside and outside circularity quality and avoiding is swaged the control method of folding, special
Sign is: in step (4), the best circle-feeding amount of original blank is 45 °；Original blank is round material, is in symmetry, mould of swaging
Tool four, in 90 ° of distributions, the multiple that the best circle-feeding amount period of swaging is 45 °.
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| DE102008036226B4 (en) * | 2008-08-02 | 2018-12-27 | Volkswagen Ag | Method for producing a hollow shaft |
| CN104493035A (en) * | 2014-11-24 | 2015-04-08 | 西安创新精密仪器研究所 | Rotary swaging method for processing pull rods |
| CN105224813B (en) * | 2015-10-22 | 2017-11-03 | 上海理工大学 | Car variable-section variable wall thickness is swaged axis blank strength design |
| CN105772621B (en) * | 2016-01-18 | 2017-08-25 | 上海理工大学 | Car universal drive shaft determines method without plug radial feed technological parameter of swaging |
| CN105710273B (en) * | 2016-01-18 | 2017-11-03 | 上海理工大学 | Car constant-speed universal drive shaft circle-feeding technological parameter of swaging determines method |
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2017
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