CN104200008B - The computational methods of ┛ ┗ type handware deep-drawing structures deformation after uniform thickness impact forging processing - Google Patents
The computational methods of ┛ ┗ type handware deep-drawing structures deformation after uniform thickness impact forging processing Download PDFInfo
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- CN104200008B CN104200008B CN201410380044.1A CN201410380044A CN104200008B CN 104200008 B CN104200008 B CN 104200008B CN 201410380044 A CN201410380044 A CN 201410380044A CN 104200008 B CN104200008 B CN 104200008B
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Abstract
The present invention relates to one kindThe computational methods of type handware deep-drawing structure deformation after uniform thickness impact forging processing, belong to punch process field, describedThe deep-drawing structure of the straight-arm of type handware two uses the streamlined structure of all circular arcs of curve and tangent transition, and spacing of two straight-arm after single uniform thickness impact forging processing isD is the spacing of the straight-arm of handware two, T is the thickness of sheet material, R1 is the radius of interior tip circle, R2 is the radius of inscribed circle, and H is the vertical height of streamlined deep-drawing structure, and β is the angle of center of circle line and tip circle center line, above-mentioned formula is set up into threedimensional model, importing Deform3D carries out the numerical simulation of uniform thickness impact forging, H, R1 and R2 parameter in streamlined drawing model is constantly adjusted, untill without defective workmanship.
Description
Technical field
The present invention relates to one kindThe computational methods of type handware deep-drawing structure deformation after uniform thickness impact forging processing, belong to punching
Pressure manufacture field.
Background technology
In electronic product, there is a class to haveThe magnetic bracket handware of type partial structurtes, characteristic feature is：HandwareType partial structurtes include two vertical straight-arms, the two height summation be more than between the two away from.The support is used to install permanent magnet, is
Ensure that the magnetic line of force is evenly distributed, it is necessary to assure magnetic bracket thickness uniformity everywhere, therefore two same hardware of straight-arm thickness
Other part thickness of part are equal.Roughly at a glance, the seemingly common stamping parts of this product is such as formed with metallic plate punching, is compared
It is easily guaranteed that magnetic bracket thickness uniformity everywhere；But examine highly larger, the flattening of two bending straight walls in the middle of finding
Subregion is overlapped afterwards, therefore common Sheet Metal Forming Technology cannot shape such special magnetic bracket, and general solution is adopted
With welding, magnetic bracket handware is divided into two and process respectively, finally welded.
Due to magnetic bracket part in volume miniaturization, weight lightweight, save assembling and under cost etc. is required, it is necessary to will
The magnetic bracket handware entirety impact forging shaping of welding originally.The magnetic bracket step-by-step movement uniform thickness impact forging technique for occurring in recent years,
Successfully produce and carryThe plate material parts of type partial structurtes, this technique is as follows：Two straight-arm spacing are expanded to 18mm first, are made
Must carryThe plate material parts of type partial structurtes can be flattened, and the blank of drip molding is readily obtained by blank operation, bending
Two straight-arms produce plate material parts of the two straight-arm spacing more than desired value, then divide several work step drawing to the size of drawing requirement
Connection carrier bends spacing untill desired value progressively to shorten, and the two straight-arm spacing that each work step is fixed after shortening are used etc.
Thick cold-forging technique, by the connection carrier uniform thickness cold forging of drawing to former sotck thinkness, its process flow diagram is as shown in Figure 1.
Processed with above-mentioned step-by-step movement uniform thickness impact forging techniqueDuring type structure handware, processed on condition that must assure that
Handware crack-free, corrugation and the defective workmanship such as overlapping material.The deep-drawing structure for connecting carrier is extremely important, and it is improper such as to select
Will directly rupture, wrinkle and the defective workmanship such as overlapping material.Thus in mold design, often take a long time and do a large amount of
Experiment, can just obtainThe accurate deep-drawing structure of type handware.It is new in processing one due to handware model, the difference of size
During the handware of model, original deep-drawing structure is inaccurate, also determines the processing accurate deep-drawing structure of the handware without means,
Need to repeat above-mentioned experiment, thus resulted in the waste of resource, manpower, and delay product duration, it is therefore desirable to be a kind of
The method for processing the handware deep-drawing structure can be accurately calculated.
The content of the invention
The purpose of the present invention is to propose to one kindThe calculating side of type handware deep-drawing structure deformation after uniform thickness impact forging processing
Method, the method can be calculatedSpacing of the straight-arm of type handware two after single uniform thickness impact forging processing, so as to solve existing skill
Art cannot rapidly determine the problem of the deep-drawing structure for processing the handware.
The technical solution adopted in the present invention is：The calculating of type handware deep-drawing structure deformation after uniform thickness impact forging processing
Method, comprises the following steps：
It is describedThe deep-drawing structure of the straight-arm of type handware two is using all circular arcs of curve and the streamlined knot of tangent transition
Structure, two straight-arm the impact forging of single uniform thickness processing after spacing be
Can be obtained by formula (1)：
In formula：D is the spacing of the straight-arm of handware two,
T is the thickness of sheet material,
R1 is the radius of interior tip circle,
R2 is the radius of inscribed circle, and when R2 takes maximum, it passes through the half of technical gaps with the tangent line of sheet material upper surface
Justify point of contact, i.e. straight-arm outward flange to technical gaps semicircle point of contact and the center of circle three point on a straight line of inscribed circle R2,
H is the vertical height of streamlined deep-drawing structure,
β is the angle of center of circle line and tip circle center line；
Threedimensional model is set up with above-mentioned formula, importing Deform 3D carries out the numerical simulation of uniform thickness impact forging, constantly adjustment stream
H, R1 and R2 parameter in line style drawing model, untill without defective workmanship.
Inventive principle：Comprehensive analysis is carried out to common Sheet drawing structure, such as Fig. 2, Fig. 4, Fig. 6 is finally given and is distinguished institute
The mutually level U-shaped, V-type shown and streamlined three kinds of deep-drawing structures, other can be combinations thereof.
In order to verify three kinds of basic deep-drawing structure excellent suitability for press forming effects, manufacture impact forging mould selects above-mentioned three kinds of deep-drawing structures
Carry out uniform thickness impact forging experiment, experimental result such as Fig. 3, Fig. 5, Fig. 7.
Fig. 3 for arc transition U-shaped deep-drawing structure (as shown in Figure 2) by uniform thickness impact forging experimental result, from figure hair
Now obvious overlapping material and fracture process defect, main cause are material flow direction and the forging on the both sides for being similar to U-shaped drawing
Pressure direction is vertical, and material all flows to sheet material horizontal direction, is formed in bottom and piled up, and now flow resistance constantly increases, and forges
The pressure time is very short, and the material being packed together causes overlapping material and the technique of fracture to lack because larger resistance has little time transfer
Fall into.
Fig. 5 is the experimental result of the uniform thickness impact forging of the connection carrier V-type deep-drawing structure in Fig. 4, the fracture work relative to Fig. 3
Skill defect is improved, but overlapping defects or wavy is still existed.Respectively there is one section due to there are both sides in the middle of the V-type shape of Fig. 2
The straight transitions of a length of L, increase material flow resistance, delay the time that material flows to drawing bottom, when punch-pin goes downwards to
During bottom dead centre, the material for reaching drawing bottom has little time transfer, causes to overlap or wavy defect.
The experimental result of the streamlined drawing uniform thickness impact forging of Fig. 7 corresponding diagrams 6, without discovery defective workmanship in Fig. 7, reason is
The deep-drawing structure tangent transition of all circular arcs of Fig. 6.From Hydrodynamics Theory, during fluid relative object movement, typically exist
The turning point of object produces vortex movement, and reason is that fluid can not transfer, and the segment fluid flow does not participate in the flowing of Main way, but
Vortex movement is produced by other fluid drivens.Such as by mold design into without unexpected turning point it is streamlined when, then can subtract
The whirlpool region of small fluid, reduces the energy being lost during metal flow forward, so as to reduce the resistance of flowing.
By experimental analysis above, easily know：The all curves of sheet material be made up of circular arc and Fig. 6 of tangent transition drawing
Deep structure, comparatively facilitating prevents overlapping material after sheet metal deep drawing again produced by uniform thickness impact forging, fracture and the technique such as wavy
Defect.Because shape is similar to streamlined, this deep-drawing structure is defined as streamlined deep-drawing structure herein.
As shown in Figure 8,9, O1, O2 are respectively interior tip circle R1's and inscribed circle R2 to the Mathematical Modeling schematic diagram of streamlined drawing
The center of circle, the distance of straight-arm outward flange to technical gaps semicircle point of contact A1, A2 is sheet metal thickness T.When inscribed circle R2 takes maximum,
The semicircle point of contact A2 that it passes through technical gaps with the tangent line of sheet material upper surface, i.e. A1, A2 point and 3 points of O2 points is conllinear.By Fig. 8,9 can
Know：
D is the spacing of two straight-arms in formula,
T is the thickness of sheet material,
R1 is the radius of interior tip circle,
R2 is the radius of inscribed circle,
H is the vertical height of streamlined deep-drawing structure,
β is the angle of center of circle line and tip circle center line.
Can be obtained by formula (1)：
The numerical simulation of streamlined drawing and experimental verification：
The uniform thickness impact forging of sheet material belongs to cubic deformation, and elastic deformation very little is negligible, so can be entered using rigid plastic model
Row FEM calculation.Friction type uses shearing friction type, and except blank outer mold uses rigid body, blank is using thickness T=1mm
Cold-reduced sheet.Mathematical Models threedimensional model based on streamlined drawing, uniform thickness punching is carried out by this model importing Deform 3D
The numerical simulation of forging, constantly adjusts H, R1 and R2 parameter in streamlined drawing model, untill without defective workmanship.
Brief description of the drawings
The invention will be further described in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is stepwise equal-thickness stamp-forging forming process schematic flow sheet,
Fig. 2 is U-shaped deep-drawing structure schematic diagram,
Fig. 3 is design sketch of the U-shaped deep-drawing structure after uniform thickness press forging and forming,
Fig. 4 is V-type deep-drawing structure schematic diagram,
Fig. 5 is design sketch of the V-type deep-drawing structure after uniform thickness press forging and forming,
Fig. 6 is streamlined deep-drawing structure schematic diagram,
Fig. 7 is design sketch of the streamlined deep-drawing structure after uniform thickness press forging and forming,
Fig. 8 is the top view of streamlined deep-drawing structure Mathematical Modeling,
Fig. 9 is the sectional view of streamlined deep-drawing structure Mathematical Modeling,
Figure 10 a-c are the finished product design sketch simulated with streamlined deep-drawing structure Mathematical Modeling, and Figure 10 a are first time uniform thickness
Effect simulation figure after press forging and forming, Figure 10 b are the effect simulation figures after second uniform thickness press forging and forming, and Figure 10 c are third times
Effect simulation figure after uniform thickness press forging and forming,
Figure 11 a-c are uniform thickness impact forging finished product actual effect figure, and Figure 11 a are the finished product reality after first time uniform thickness press forging and forming
Design sketch, Figure 11 b are the finished product actual effect figures after second uniform thickness press forging and forming, and Figure 11 c are third time uniform thickness press forging and formings
Finished product actual effect figure afterwards.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
The Mathematical Modeling of streamlined drawing
The computational methods of type handware deep-drawing structure deformation after uniform thickness impact forging processing, comprise the following steps：
It is describedThe deep-drawing structure of the straight-arm of type handware two is using all circular arcs of curve and the streamlined knot of tangent transition
Structure, two straight-arm the impact forging of single uniform thickness processing after spacing be
In formula：D is the spacing of the straight-arm of handware two,
T is the thickness of sheet material,
R1 is the radius of interior tip circle,
R2 is the radius of inscribed circle,
H is the vertical height of streamlined deep-drawing structure,
β is the angle of center of circle line and tip circle center line.
The uniform thickness impact forging of sheet material belongs to cubic deformation, and elastic deformation very little is negligible, so can be entered using rigid plastic model
Row FEM calculation.Friction type uses shearing friction type, and except blank outer mold uses rigid body, blank is using thickness T=1mm
Cold-reduced sheet.
Mathematical Models threedimensional model based on streamlined drawing, uniform thickness impact forging is carried out by this model importing Deform3D
Numerical simulation, H, R1 and R2 parameter in streamlined drawing model are constantly adjusted, untill without defective workmanship.
The numerical simulation result of uniform thickness impact forging technique is as shown in Figure 10 a-c：By three streamlined drawing, two straight-arm spacing
Shorten to desired value 10mm, by simulate calculate the two straight-arm spacing that the 1st, 2,3 uniform thickness impact forging simulate be respectively 14.29,
11.98、10.02mm。
Embodiment：According to the technological parameter of numerical simulation, manufacture experiment mould carries out experimental verification, is correctly to design the magnetic
Power support multi-station progressive die provides foundation.Uniform thickness impact forging laboratory sample as illustrated in figs. 11a-c, as can be seen from the figure outside product
Appearance quality preferably, without defective workmanship, coincide very much with numerical simulation result.Measure the 1st, 2,3 uniform thickness impact forging laboratory samples
Two straight-arm spacing are respectively 14.49,12.10,10.07mm, it is big respectively compared with the theoretical value of uniform thickness impact forging numerical simulation
0.20th, 0.12,0.05mm, this is that material is thinning at drawing, causes experiment value big because streamlined drawing height is larger for the first time
In theoretical value.With the 2nd, 3 height reductions of streamlined drawing, material is thinning very small, and its theoretical value is just non-with experiment value
Very close to.
Above result of study is summarized, such as magnetic bracket is produced in a set of progressive die, is ensureing uniform thickness impact forging technique
On the premise of non-overlapping, fracture and the defective workmanship such as wavy, the Layout of magnetic bracket needs the streamlined deep drawing step of three steps
And three step uniform thickness impact forging work steps, two straight wall spacing could progressively be shortened to 10mm from 18mm.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding can carry out various changes, modification, replacement to these embodiments without departing from the principles and spirit of the present invention
And modification, the scope of the present invention be defined by the appended.
Claims (1)
1.The computational methods of type handware deep-drawing structure deformation after uniform thickness impact forging processing, it is characterised in that including following step
Suddenly：
It is describedThe deep-drawing structure of the straight-arm of type handware two is using all circular arcs of curve and the streamlined structure of tangent transition, institute
Stating spacing of two straight-arms after single uniform thickness impact forging processing is
Can be obtained by formula (1)：
In formula：D is the spacing of the straight-arm of handware two,
T is the thickness of sheet material,
R1 is the radius of interior tip circle,
R2 is the radius of inscribed circle, and when R2 takes maximum, it is cut with the tangent line of sheet material upper surface by the semicircle of technical gaps
Point, i.e. straight-arm outward flange to technical gaps semicircle point of contact and inscribed circle R2 center of circle three point on a straight line,
H is the vertical height of streamlined deep-drawing structure,
β is the angle of center of circle line and tip circle center line；
Threedimensional model is set up with above-mentioned formula, importing Deform 3D carries out the numerical simulation of uniform thickness impact forging, constantly adjusts streamlined
H, R1 and R2 parameter in drawing model, untill without defective workmanship.
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| CN201410380044.1A CN104200008B (en) | 2014-08-04 | 2014-08-04 | The computational methods of ┛ ┗ type handware deep-drawing structures deformation after uniform thickness impact forging processing |
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| CN201410380044.1A CN104200008B (en) | 2014-08-04 | 2014-08-04 | The computational methods of ┛ ┗ type handware deep-drawing structures deformation after uniform thickness impact forging processing |
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| CN108465770B (en) * | 2018-04-20 | 2019-12-10 | 洛阳Lyc轴承有限公司 | Forging forming method for inner ring and outer ring of bearing of motor train unit with reasonable streamline distribution |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101402128A (en) * | 2008-11-12 | 2009-04-08 | 湖北天轮机械有限公司 | Self-changing gearbox flywheel bracket tray deep-drawing hammer down forming process and mould |
| CN102189173A (en) * | 2011-03-09 | 2011-09-21 | 南京工业职业技术学院 | Carrier-free one-die two-piece forming method for bracket |
| CN102489647A (en) * | 2011-12-13 | 2012-06-13 | 合肥金海康五金机械制造有限公司 | Stepwise equal-thickness stamp-forging forming process for magnetic bracket |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2004237330A (en) * | 2003-02-06 | 2004-08-26 | Asmo Co Ltd | Sheet metal product and sheet metal product manufacturing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101402128A (en) * | 2008-11-12 | 2009-04-08 | 湖北天轮机械有限公司 | Self-changing gearbox flywheel bracket tray deep-drawing hammer down forming process and mould |
| CN102189173A (en) * | 2011-03-09 | 2011-09-21 | 南京工业职业技术学院 | Carrier-free one-die two-piece forming method for bracket |
| CN102489647A (en) * | 2011-12-13 | 2012-06-13 | 合肥金海康五金机械制造有限公司 | Stepwise equal-thickness stamp-forging forming process for magnetic bracket |
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