CN103611916A - Pouring design method of ADC6 aluminum alloy casting die with peninsula thin wall structure - Google Patents

Abstract

The invention discloses a pouring design method of an ADC6 aluminum alloy casting die with a peninsula thin wall structure. The method includes: respectively designing ad die body part and a plurality of pouring ports according to casting processes and die designing rules; making a melt peninsula entering standard tangential line cluster according to the contour of a peninsula; selecting one point, close the pouring ports, on a body opposite to the peninsula, and designing a bridge pouring path, with a swing line, from the point to the peninsula according to the relation ship between the main direction of the peninsula and the melt flowing direction and the flowability of ADC6 so as to complete die design. The method has the advantages that the conventional linear runner is changed into standard tangential line curve fitting, the second-stage continuity property of the fitted curve is used to lower the pressure attenuation of ADC6, the casting pioneer to arrive at the thin wall smoothly, flow impact is eliminated basically, and stable filling is achieved.

Description

With the ADC6 aluminum alloy die-casting die of peninsula thin-wall construction, enter to water method for designing

[technical field]

The invention belongs to the shaping processing technique field of metallic element, what specifically refer to a kind of ADC6 aluminum alloy die-casting die with peninsula thin-wall construction enters to water method for designing.

[background technology]

ADC6 is that aluminium alloy ，Yu China GB aluminium alloy ZL303 performance of the Japanese trade mark is suitable, and its magnesium elements composition accounts for 4%, higher with conventional aluminium alloy phase ratio content.Utilize this manufacture of materials diecast parts, the advantage of part is: (1) institutional framework is fine and close, can be used for carrying class part and alternate load occasion; (2) meet high strength and lightweight requirements; (3) corrosion resistance and good.Its weak point is: (1) magnesium element content is high, and material flowability can be poor, difficult forming thin-walled, limits its light-weighted scope; (2) there is stronger red brittleness; (3) diecasting alloys smelting technology and moulding process all need to redesign or improve, and Design of Dies difficulty is also larger.

In this case, at the parts such as piston rod of motorcycle pedal, engine cylinder of motorcycle, minitype motivation machinery, all select this material.In automobile and motorcycle accessory, the requirement due to functions such as connection, installation or carryings, has the common ADC6 aluminum alloy die casting of a class, and it is tabular that its feature is self, has peninsular structure, has dividing of the He Wai peninsula, the interior peninsula.Peninsular structure increases die casting flow channel length greatly, adds the poor mobile performance of ADC6 aluminium alloy self, realize filling full, is that difficulty all increases greatly on technique or mould.

Chinese invention patent ZL201010262502.3 discloses a kind of high-compactness method of squeeze forming of Al-alloy casing die casting, and the method is adding technology bridge structure in Design of Dies, realizes the Fast Filling of die casting far-end.Chinese invention patent ZL201110128084.3 disclose a kind of large aluminum alloy housing mould, prepare the method for Al-alloy casing, be characterized in being connected with ingate on sprue, die tip is not established rising head.Chinese invention patent ZL201010155632.7 discloses a kind of ultrathin-wall non-leakage aviation aluminium alloy element die casting mould special, propose to adopt Crossed Circle feeding structure and T shape vent groove configuration to carry out die casting, make in press casting procedure, aluminium liquid enters die cavity fast, has guaranteed that part thin-walled portion is full of.The object of these methods is nearly all in order to shorten melt the filling distance, realizes filling smoothly full.But in fact, shorten the filling distance always limited, thereby as above the effect of these methods is also limited.The poor mobile performance of ADC6 self, even if the filling distance is short again, if the decline of pressure of melt is larger, also can bring the discontented problem of filling.

Current in order to solve the shaping thin wall problem of ADC6, industry is mainly adopted with the following method: (1) improves heating-up temperature, but because Mg constituent content is high, can bring the problem of " burning " and " oxidation ".(2), in the manufacture process of mould, improve as far as possible the surface quality of runner processing, but machining accuracy also cannot unrestrictedly improve; (3) adopt " bridge joint " structure, shorten as far as possible the distance that flows, as mentioned above, effect is always limited.In fact, in press casting procedure, although short flow process is conducive to reduce pressure and temperature loss, can bring the turbulent flow of melt simultaneously, cause the defects such as pore and slag inclusion.Thereby be not that flow process is more short better, but between the short distance filling of melt and steady flow seeking balance.

In view of this, the inventor, for the defect further investigation of prior art, has this case to produce then.

[summary of the invention]

The technical problem to be solved in the present invention, what be to provide a kind of ADC6 aluminium alloy with peninsula thin-wall construction enters to water method, conventional linear pattern runner is changed into pseudo-tangent line type curve, utilize the Second Order Continuous character of matched curve, reduce the flowing pressure attenuation of ADC6, make die casting forward arrive at smoothly thin-walled place, substantially eliminate impact flow, realize steadily and filling.

The present invention is achieved in that

With the ADC6 aluminum alloy die-casting die of peninsula thin-wall construction enter to water method for designing, comprise the steps:

Step 1: by extrusion process and Design of Dies rule, designing mould body part some enter cast gate;

Step 2: the enclosure rectangle X that makes peninsula profile S; And make maximum inscribed circle C1 and minimum inscribed circle C2 according to this peninsula profile S and enclosure rectangle X, and to establish its radius and be respectively R1 and R2, distance of center circle is d; Get the circle center line connecting of C1 and C2 as peninsula profile principal direction vector, be designated as vector

Step 3: crossing circle C1, the C2 center of circle and perpendicular to vector radius of circle mid point on get respectively E, F, G, H 4 points, obtain melt and tangentially enter island boundaries FG, EH; At line segment EF, take up an official post and get some somes Q ₁, Q ₂..., Q _m- ₁, Q _m,, at line segment GH, take up an official post and get some somes P ₁, P ₂..., P _n- ₁, P _n; Any line of these two groups points and vector

not overlapping, form tangent relation with peninsula profile S, for melt enters the accurate tangential line in island, the lines of all two groups of points are called melt and enter the accurate tangential line bunch in island, enter the accurate tangential line bunch vertical line in island be called melt and enter the accurate normal direction line bunch in island with described melt;

Step 4: establish described melt and enter the accurate tangential line in island and vector

formation angle is α, and 6.5 ° of-6.5 ° of < α < are the zone of reasonableness of pseudo-tangent line, i.e. vector

the melt of deflection ± 6.5 ° enter curve A in the accurate tangential line in island bunch ' B' is as entering to water direction;

Step 5: enter cast gate place described in close on the body on opposite, the peninsula and choose any for C;

Step 6: cross C point and make the normal of body, and suppose that D is that on normal, certain a bit, is designated as vector

Step 7: compute vector A'B' and vector

angle theta,

$\mathrm{\&theta;}=\arccos \frac{\stackrel{\&OverBar;}{\mathrm{AB}}\&CenterDot;\stackrel{\&OverBar;}{\mathrm{CD}}}{\left|\stackrel{\&OverBar;}{\mathrm{AB}}\right|\&CenterDot;\stackrel{\&OverBar;}{\left|\mathrm{CD}\right|}}$

Step 8: in the time of in the scope of 0 °≤θ≤6.5 ° or 180 °-6.5 °≤θ≤180 °, enter to water direction and adopt along vector direction to vectorial A'B';

In the time of in the scope of 90 °-6.5 °≤θ≤90 °+6.5 °, enter to water direction and adopt along vector

normal direction to vectorial A'B';

In the time of in the scope of 180 °-6.5 ° of 90 °-6.5 ° of 6.5 ° of < θ < or 90 °+6.5 ° < θ <, according to parametric equation below, make cycloid BC:

The base radius of a circle d/2 that wherein r is cycloid, equals vector

half of length,

for parameter,

get in this cycloid with vectorial A'B' and

all tangent one section as cycloid BC, enter to water direction and adopt along vector

to cycloid BC, to vectorial A'B' direction;

Step 9: theoretical according to conventional Design of Die, design cast gate and running channel, complete Design of Dies.

The invention has the advantages that:

1, fully take into account the feature of ADC6 material, the cast gate of design is that normal direction is divided to flow to and watered, or " standard " tangent line, breaks away from conventional " bridge connected " geodesic line method for designing, or is strict with tangentially to enter to water.This method flexibility is large, as long as melt enters in the accurate tangential line in island bunch, just can reach the effect that significantly reduces the die casting pressure loss, meets the die-cast product feature that shape is changeable.

2, the molded line of cast gate is smooth, and changeover portion adopts cycloid to connect, and can realize melt forward and can arrive at filling end with prestissimo, reaches good die casting effect.Meanwhile, the design of cycloid and machining are all more convenient.

[accompanying drawing explanation]

The invention will be further described in conjunction with the embodiments with reference to the accompanying drawings.

Fig. 1 is the aluminum alloy part structural representation of the peninsula of the present invention thin-wall construction.

Fig. 2 is the system schematic of entering to water of the present invention.

Fig. 3 a to Fig. 3 d is that the present invention determines into island pseudo-tangent line process schematic diagram.

What Fig. 4 a to Fig. 4 d was that in the present invention, θ is respectively 180 ° of 90 °, 90 °, 90 ° < θ < of 0 °, 0 ° < θ < enters to water mode schematic diagram.

Fig. 5 a to Fig. 5 d is the concrete steps schematic diagram of the present invention's one specific embodiment.

[specific embodiment]

As shown in Figure 1, with the ADC6 aluminum alloy spare part of peninsula thin-wall construction, comprise die ontology 1, peninsular structure 2, the design that it enters to water method, comprises the steps:

Step 1: by extrusion process and Design of Dies rule, designing mould body part some enter cast gate 3, as shown in Figure 2;

Step 2: as shown in Fig. 3 a to Fig. 3 d, make the enclosure rectangle X of peninsula profile S; And make maximum inscribed circle C1 and minimum inscribed circle C2 according to this peninsula profile S and enclosure rectangle X, and to establish its radius and be respectively R1 and R2, distance of center circle is d; Get the circle center line connecting of C1 and C2 as peninsula profile principal direction vector, be designated as vector

Step 3: crossing circle C1, the C2 center of circle and perpendicular to vector

radius of circle mid point on get respectively E, F, G, H 4 points, obtain melt and tangentially enter island boundaries FG, EH; At line segment EF, take up an official post and get some somes Q ₁, Q ₂..., Q _m-1, Q _m,, at line segment GH, take up an official post and get some somes P ₁, P ₂..., P _n-1, P _n; Any line of these two groups points and vector

not overlapping, form tangent relation with peninsula profile S, for melt enters the accurate tangential line in island, the lines of all two groups of points are called melt and enter the accurate tangential line bunch in island, enter the accurate tangential line bunch vertical line in island be called melt and enter the accurate normal direction line bunch in island with described melt;

Step 4: establish described melt and enter the accurate tangential line in island and vector

formation angle is α, and 6.5 ° of-6.5 ° of < α < are the zone of reasonableness of pseudo-tangent line, i.e. vector

the melt of deflection ± 6.5 ° enter curve A in the accurate tangential line in island bunch ' B' is as entering to water direction; Because ADC6 aluminium alloy melt mobility in die cast is poor, learn through test of many times, in the die cavity of shape smooth (being curve Second Order Continuous), carry out entering to water Shi Ruoneng, the pressure loss is less.But be limited to concrete product structure, be difficult to accomplish that die cavity is smooth, can suitably also reduce smooth requirement.It is not that all being reasonably enters to water line that melt enters the accurate tangential line bunch in island, only has and vector the pseudo-tangent line that shape forms an angle within the scope of α is only and optionally enters to water direction, otherwise the pressure loss causes too greatly filling unsuccessfully.Through repetition test and reasoning, draw vector

the melt of deflection ± 6.5 ° enter curve A in the accurate tangential line in island bunch ' B' is as entering to water direction;

Step 5: choose any for C near entering cast gate 3 places on the body on opposite, the peninsula, from a bridge joint running channel 4 of C point design to peninsular structure 2;

Step 6: cross C point and make the normal of body, and suppose that D is that on normal, certain a bit, is designated as vector

Step 7: compute vector A'B' and vector

angle theta,

$\mathrm{\&theta;}=\arccos \frac{\stackrel{\&OverBar;}{\mathrm{AB}}\&CenterDot;\stackrel{\&OverBar;}{\mathrm{CD}}}{\left|\stackrel{\&OverBar;}{\mathrm{AB}}\right|\&CenterDot;\stackrel{\&OverBar;}{\left|\mathrm{CD}\right|}}$

Step 8: in the time of in the scope of 0 °≤θ≤6.5 ° or 180 °-6.5 °≤θ≤180 °, enter to water direction and adopt along vector

direction to vectorial A'B';

In the time of in the scope of 90 °-6.5 °≤θ≤90 °+6.5 °, enter to water direction and adopt along vector

normal direction to vectorial A'B';

In the time of in the scope of 180 °-6.5 ° of 90 °-6.5 ° of 6.5 ° of < θ < or 90 °+6.5 ° < θ <, according to parametric equation below, make cycloid BC:

The base radius of a circle d/2 that wherein r is cycloid, equals vector

half of length,

for parameter,

get in this cycloid with vectorial A'B' and

all tangent one section as cycloid BC, enter to water direction and adopt along vector

to cycloid BC, to vectorial A'B' direction;

Step 9: theoretical according to conventional Design of Die, design cast gate and running channel, complete Design of Dies.

Be a specific embodiment below:

Tabular die casting as shown in Figure 5 a.Picture dotted line circle place in figure is Al-Jazeera shape structure, and entering the scheme of watering is that base is entered to water, and introduces bridging method this place, peninsula structure is carried out to straight forming.

Implementation step is as follows:

Step 1: the die casting cast gate design planning according to conventional, designs into the system of watering.As shown in Figure 5 b.

Step 2: as Fig. 5 c, due to peninsula regular shape, can directly make maximum inscribed circle and minimum inscribed circle, get C circle center line connecting as peninsula profile principal direction vector

its length 60mm;

Step 3: as Fig. 5 c, in excessively round 2 centers of circle and perpendicular to vector

radius of circle mid point on get respectively E, F, G, H 4 points, obtain melt standard and tangentially enter island boundaries; In this border, the lines of all two groups of points are melt and enter the accurate tangential line bunch in island.

Step 4: as Fig. 5 c, become maximum angle of cut α=3.5 ° with principal direction in accurate tangential line bunch, meet 6.5 ° of 0 ° of < α <, at the zone of reasonableness that is pseudo-tangent line.Therefore amount of orientation here 3 ° of conducts of deflection enter to water direction.

Step 5: as Fig. 5 c, choose a bit near entering cast gate place on body over there, be designated as C point.

Step 6, mistake C point are made the normal of body, and suppose that D is that on normal, certain a bit, is designated as vector

Step 7, compute vector

and vector

angle theta=63 °.

Step 8: due to 173.5 ° of 6.5 ° of < θ <, do with with

the cycloid section tangent and basic circle is 60mm, as the BC arc in Fig. 5 c; Enter to water direction and be C → D → cycloid BC → tangentially enter to water A → B;

Step 9: as Fig. 5 d, theoretical according to conventional Design of Die, design cast gate and running channel, complete Design of Dies.

The present invention fully takes into account the feature of ADC6 material, and the cast gate of design is that normal direction is divided to flow to and watered, or " standard " tangent line, breaks away from conventional " bridge connected " geodesic line method for designing, or is strict with tangentially to enter to water.This method flexibility is large, as long as melt enters in the accurate tangential line in island bunch, just can reach the effect that significantly reduces the die casting pressure loss, meets the die-cast product feature that shape is changeable.The molded line of cast gate is smooth, and changeover portion adopts cycloid to connect, and can realize melt forward and can arrive at filling end with prestissimo, reaches good die casting effect.Meanwhile, the design of cycloid and machining are all more convenient.

The foregoing is only better enforcement use-case of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of doing, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.

Claims (1)

1. With the ADC6 aluminum alloy die-casting die of peninsula thin-wall construction enter to water method for designing, it is characterized in that: comprise the steps:

   Step 1: by extrusion process and Design of Dies rule, designing mould body part some enter cast gate;

   Step 2: the enclosure rectangle X that makes peninsula profile S; And make maximum inscribed circle C1 and minimum inscribed circle C2 according to this peninsula profile S and enclosure rectangle X, and to establish its radius and be respectively R1 and R2, distance of center circle is d; Get the circle center line connecting of C1 and C2 as peninsula profile principal direction vector, be designated as vector

   

   Step 3: crossing circle C1, the C2 center of circle and perpendicular to vector

   

   radius of circle mid point on get respectively E, F, G, H 4 points, obtain melt and tangentially enter island boundaries FG, EH; At line segment EF, take up an official post and get some somes Q ₁, Q ₂..., Q _m-1, Q _m,, at line segment GH, take up an official post and get some somes P ₁, P ₂..., P _n-1, P _n; Any line of these two groups points and vector

   

   not overlapping, form tangent relation with peninsula profile S, for melt enters the accurate tangential line in island, the lines of all two groups of points are called melt and enter the accurate tangential line bunch in island, enter the accurate tangential line bunch vertical line in island be called melt and enter the accurate normal direction line bunch in island with described melt;

   Step 4: establish described melt and enter the accurate tangential line in island and vector

   

   formation angle is α, and 6.5 ° of-6.5 ° of < α < are the zone of reasonableness of pseudo-tangent line, i.e. vector

   

   the melt of deflection ± 6.5 ° enter curve A in the accurate tangential line in island bunch ' B' is as entering to water direction;

   Step 5: enter cast gate place described in close on the body on opposite, the peninsula and choose any for C;

   Step 6: cross C point and make the normal of body, and suppose that D is that on normal, certain a bit, is designated as vector

   

   Step 7: compute vector A'B' and vector

   

   angle theta,

   $\mathrm{\&theta;}=\arccos \frac{\stackrel{\&OverBar;}{\mathrm{AB}}\&CenterDot;\stackrel{\&OverBar;}{\mathrm{CD}}}{\left|\stackrel{\&OverBar;}{\mathrm{AB}}\right|\&CenterDot;\stackrel{\&OverBar;}{\left|\mathrm{CD}\right|}}$

   Step 8: in the time of in the scope of 0 °≤θ≤6.5 ° or 180 °-6.5 °≤θ≤180 °, enter to water direction and adopt along vector direction to vectorial A'B';

   In the time of in the scope of 90 °-6.5 °≤θ≤90 °+6.5 °, enter to water direction and adopt along vector normal direction to vectorial A'B';

   In the time of in the scope of 180 °-6.5 ° of 90 °-6.5 ° of 6.5 ° of < θ < or 90 °+6.5 ° < θ <, according to parametric equation below, make cycloid BC:

   The base radius of a circle d/2 that wherein r is cycloid, equals vector half of length,

   

   for parameter,

   

   get in this cycloid with vectorial A'B' and

   

   all tangent one section as cycloid BC, enter to water direction and adopt along vector

   

   to cycloid BC, to vectorial A'B' direction;

   Step 9: theoretical according to conventional Design of Die, design cast gate and running channel, complete Design of Dies.

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