CN103611916B - With peninsula thin-wall construction ADC6 aluminum alloy die-casting die enter to water method for designing - Google Patents

Abstract

With peninsula thin-wall construction ADC6 aluminum alloy die-casting die enter to water method for designing, comprising: by extrusion process and Design of Dies rule, respectively designing mould body part some enter cast gate; Make melt according to peninsula profile and enter the accurate tangential line bunch in island.The body on opposite, the peninsula is chosen a bit near entering cast gate place, the relation flowing to from this to the peninsula according to the principal direction on the peninsula and melt, and the mobility of ADC6, concrete condition design one enters to water road with the bridge joint of cycloid, completes Design of Dies.The present invention changes the linear pattern runner of routine as pseudo-tangent line type curve into, utilizes the Second Order Continuous character of matched curve, reduces the flowing pressure attenuation of ADC6, makes die casting forward arrive at thin-walled place smoothly, substantially eliminate impact flow, realizes steadily filling.

Description

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

[technical field]

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

[background technology]

ADC6 is the aluminium alloy of the Japanese trade mark, and suitable with China GB aluminium alloy ZL303 performance, its magnesium elements composition accounts for 4%, and content is higher compared with conventional aluminum alloys.Utilize this manufacture of materials diecast parts, then the advantage of part is: (1) institutional framework is fine and close, can be used for carrying class part and alternate load occasion; (2) high strength and lightweight requirements is met; (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, this material is all selected at the part such as piston rod of motorcycle pedal, engine cylinder of motorcycle, minitype motivation machinery.In automobile and motorcycle accessory, owing to connecting, installing or the requirement of the function such as carrying, have the ADC6 aluminum alloy die casting that a class is common, its feature self be tabular, has peninsular structure, has dividing of the interior peninsula and the outer peninsula.Peninsular structure makes die casting flow channel length greatly increase, and adds the poor mobile performance of ADC6 aluminium alloy self, and realize filling full, be that difficulty increases all greatly in 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 discloses a kind of mould of large aluminum alloy housing, prepares the method for Al-alloy casing, and be characterized in sprue is connected with ingate, die tip does not establish 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-shaped vent groove configuration to carry out die casting, make in press casting procedure, aluminium liquid enters die cavity fast, ensure that part thin-walled portion is full of.The object of these methods is nearly all to shorten filling melt distance, realizes filling smoothly full.But in fact, shorten the filling distance always limited, thus 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 comparatively large, also can brings and fill discontented problem.

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

In view of this, the present inventor furthers investigate for the defect of prior art, then has this case to produce.

[summary of the invention]

The technical problem to be solved in the present invention, be to provide a kind of ADC6 aluminium alloy with peninsula thin-wall construction enter to water method, the linear pattern runner of routine 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 thin-walled place smoothly, substantially eliminate impact flow, realize steadily filling.

The present invention is achieved in that

With peninsula thin-wall construction ADC6 aluminum alloy die-casting die 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 making peninsula profile S; And make maximum inscribed circle C1 and minimum inscribed circle C2 according to this peninsula profile S and enclosure rectangle X, if its radius is respectively R1 and R2, distance of center circle is d; The circle center line connecting getting C1 and C2, as peninsula profile principal direction vector, is designated as vector

Step 3: in excessively round C1, C2 center of circle and perpendicular to vector radius of circle mid point on get E, F, G, H 4 point respectively, obtain melt and tangentially enter island boundaries FG, EH; Take up an official post at line segment EF and get some somes Q ₁, Q ₂..., Q _m-1, Q _m, take up an official post at line segment GH and get some somes P ₁, P ₂..., P _n-1, P _n; Any line and the vector of these two groups of points not overlapping, form tangent relation with peninsula profile S, for melt enters the accurate tangential line in island, the line of all two groups of points is called that melt enters the accurate tangential line bunch in island, enters the accurate tangential line bunch vertical line in island be called that melt enters the accurate normal direction line bunch in island with described melt;

Step 4: establish described melt to enter the accurate tangential line in island and vector formation angle is α, and-6.5 ° of < α < 6.5 ° are the zone of reasonableness of pseudo-tangent line, i.e. vector the melt deflecting ± 6.5 ° enters vectorial A'B' in the accurate tangential line in island bunch 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 the normal that C point makes 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,

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

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

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

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

Wherein r is the base radius of a circle d/2 of cycloid, equals vector the half of length, for parameter, get in this cycloid with vectorial A'B' and all tangent one section as cycloid BC, is then entered to water direction and adopts along vector to cycloid BC, to vectorial A'B' direction;

Step 9: theoretical according to the Design of Die of routine, 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 of the significantly minimizing die casting pressure loss, meet 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, reach good die casting effect.Meanwhile, the design of cycloid and machining 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 of the present inventionly enters to water system schematic.

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

Fig. 4 a to Fig. 4 d be in the present invention θ be respectively 0 °, 0 ° < θ <, 90 °, 90 °, 90 ° < θ < 180 ° enter to water mode schematic diagram.

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

[detailed description of the invention]

As shown in Figure 1, with the ADC6 aluminum alloy spare part of peninsula thin-wall construction, comprise die ontology 1, peninsular structure 2, it enters to water the design of 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, makes 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, if its radius is respectively R1 and R2, distance of center circle is d; The circle center line connecting getting C1 and C2, as peninsula profile principal direction vector, is designated as vector

Step 3: in excessively round C1, C2 center of circle and perpendicular to vector radius of circle mid point on get E, F, G, H 4 point respectively, obtain melt and tangentially enter island boundaries FG, EH; Take up an official post at line segment EF and get some somes Q ₁, Q ₂..., Q _m-1, Q _m, take up an official post at line segment GH and get some somes P ₁, P ₂..., P _n-1, P _n; Any line and the vector of these two groups of points not overlapping, form tangent relation with peninsula profile S, for melt enters the accurate tangential line in island, the line of all two groups of points is called that melt enters the accurate tangential line bunch in island, enters the accurate tangential line bunch vertical line in island be called that melt enters the accurate normal direction line bunch in island with described melt;

Step 4: establish described melt to enter the accurate tangential line in island and vector formation angle is α, and-6.5 ° of < α < 6.5 ° are the zone of reasonableness of pseudo-tangent line, i.e. vector the melt deflecting ± 6.5 ° enters vectorial A'B' in the accurate tangential line in island bunch as entering to water direction; Because ADC6 aluminium alloy melt mobility in die cast is poor, learn through test of many times, carry out in the die cavity of shape smooth (i.e. curve Second Order Continuous) entering to water Shi Ruoneng, then the pressure loss is less.But be limited to concrete product structure, be difficult to accomplish that die cavity is smooth, then suitably can also reduce smooth requirement.Melt enters the accurate tangential line in island bunch and not all is reasonably to enter to water line, only has and vector the shape pseudo-tangent line formed an angle within the scope of α is only and optionally enters to water direction, otherwise the pressure loss causes too greatly filling unsuccessfully.Draw through repetition test and reasoning, vector the melt deflecting ± 6.5 ° enters vectorial A'B' in the accurate tangential line in island bunch as entering to water direction;

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

Step 6: cross the normal that C point makes 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,

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

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

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

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

Wherein r is the base radius of a circle d/2 of cycloid, equals vector the half of length, for parameter, get in this cycloid with vectorial A'B' and all tangent one section as cycloid BC, is then entered to water direction and adopts along vector to cycloid BC, to vectorial A'B' direction;

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

Here is a specific embodiment:

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 and carries out straight forming to this peninsula place structure.

Implementation step is as follows:

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

Step 2: as Fig. 5 c, due to peninsula regular shape, directly can make maximum inscribed circle and minimum inscribed circle, gets 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 E, F, G, H 4 point respectively, obtain melt standard and tangentially enter island boundaries; In this border, the line of all two groups of points is melt and enters the accurate tangential line bunch in island.

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

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

Step 6, excessively C point make 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 6.5 ° of < θ < 173.5 °, do with with tangent and basic circle is the cycloid section of 60mm, as the BC arc in Fig. 5 c; Entering to water direction is C → D → cycloid BC → tangentially enter to water A → B;

Step 9: as Fig. 5 d, theoretical according to the Design of Die of routine, 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 of the significantly minimizing die casting pressure loss, meet 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, reach good die casting effect.Meanwhile, the design of cycloid and machining 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 amendment done, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.

Claims (1)

1. with peninsula thin-wall construction ADC6 aluminum alloy die-casting die 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 making peninsula profile S; And make maximum inscribed circle C1 and minimum inscribed circle C2 according to this peninsula profile S and enclosure rectangle X, if its radius is respectively R1 and R2, distance of center circle is d; The circle center line connecting getting C1 and C2, as peninsula profile principal direction vector, is designated as vector

Step 3: in excessively round C1, C2 center of circle and perpendicular to vector radius of circle mid point on get E, F, G, H 4 point respectively, obtain melt and tangentially enter island boundaries FG, EH; Take up an official post at line segment EF and get some somes Q ₁, Q ₂..., Q _m-1, Q _m, take up an official post at line segment GH and get some somes P ₁, P ₂..., P _n-1, P _n; Any line and the vector of these two groups of points not overlapping, form tangent relation with peninsula profile S, for melt enters the accurate tangential line in island, the line of all two groups of points is called that melt enters the accurate tangential line bunch in island, enters the accurate tangential line bunch vertical line in island be called that melt enters the accurate normal direction line bunch in island with described melt;

Step 4: establish described melt to enter the accurate tangential line in island and vector formation angle is α, and-6.5 ° of < α < 6.5 ° are the zone of reasonableness of pseudo-tangent line, i.e. vector the melt deflecting ± 6.5 ° enters vectorial A'B' in the accurate tangential line in island bunch 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 the normal that C point makes 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,

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

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

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

Wherein r is the base radius of a circle d/2 of cycloid, equals vector the half of length, for parameter, get in this cycloid with vectorial A'B' and all tangent one section as cycloid BC, is then entered to water direction and adopts along vector to cycloid BC, to vectorial A'B' direction;

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