CN201108955Y - Gravity casting piezocrystallization forming apparatus - Google Patents
Gravity casting piezocrystallization forming apparatus Download PDFInfo
- Publication number
- CN201108955Y CN201108955Y CNU2007200557398U CN200720055739U CN201108955Y CN 201108955 Y CN201108955 Y CN 201108955Y CN U2007200557398 U CNU2007200557398 U CN U2007200557398U CN 200720055739 U CN200720055739 U CN 200720055739U CN 201108955 Y CN201108955 Y CN 201108955Y
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- rising head
- casting
- push rod
- patrix
- mold
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Abstract
The utility model relate to a metal mold pressure die casting molding device, in particular to a light-alloy metal pressure gravity die casting and crystal-forming device of ring-shaped parts, which consists of a mold and a converted common gravity casting machine. An original gravity die-casting machine is used for realizing the opening-closing and part-taking as well as other actions of the mold; a heat insulated feeder head and a feeder head pressure-adding device are arranged for the mold; a liftout attachment and a liquid level detection device are arranged on an upper mold; and a strong water-cooling device is arranged at the cross gate of a side mold casting system. The alloy solution comes into a die cavity smoothly through a casting system in an open-gravity casting state. The alloy solution in the die cavity is solidified into casting in order in a closed die cavity with a gas pressure of 0.8 to 1.3 MPa provided by a pressure-adding device at a feeder head, resulting in denser condensation organization of the casting than an ordinary gravity casting, as well as good mechanical properties and surface quality; the casting unloads mold under the function of the gas pressure provided by a plurality of push rods and the feeder head pressure-adding device with even mold unloading power and smaller deformation of casting mold unloading; the mold is produced on the present casting machine with low equipment adjustment cost and simple structure.
Description
The utility model relates to a kind of metal pattern compression casting shaped device, especially encircles the light alloy metal mould gravity casting piezocrystallization shaped device of disk-shaped part.
Background technology
The integral automobile aluminum-alloy wheel is typically to encircle disk-shaped part, is the important safety and the decorative element of automobile, and its structure and complex-shaped has higher requirements to mechanical performance and surface quality.As Fig. 1 is the front elevation of integral automobile aluminum-alloy wheel, and Fig. 2 is the A-A sectional view of integral automobile aluminum-alloy wheel Fig. 1.As shown in Figure 2: there are matching requirements the wheel rim part and the mounting disc position of integral automobile aluminum-alloy wheel, diameter precision, axial runout precision and circular runout precision are all had higher requirements, and this has just determined must just can reach instructions for use through machining processes with the wheel rim of the integral automobile aluminum-alloy wheel of casting technique moulding and mounting disc position.Therefore when integral automobile aluminum-alloy wheel mould development, to place allowance, shown in Fig. 2 dotted line at wheel rim and mounting disc position.The front of integral automobile aluminum-alloy wheel mainly is to satisfy appearance requirement, and whether the appearance that requires when wheel is developed is depended in machined.The integral automobile aluminum-alloy wheel overwhelming majority all is an inner tube-free wheel, so the air-tightness of wheel rim part is extremely important, must 100% process air-tight test.Fig. 1, Figure 2 shows that front not mach tubeless integral automobile aluminum-alloy wheel.
At present, known integral automobile aluminum-alloy wheel gravitational casting shaped device, as Fig. 3, Fig. 4, shown in Figure 5: patrix (6), be fixed on the upper mould fixed plate (3) of casting machine, counterdie (7) is fixed on the following machine bench (4) of casting machine by die shoe (10), two side forms (8), (9) are fixed in respectively on the two side form fixed heads (2) of casting machine accordingly, utilize the casting machine oil cylinder patrix (6), counterdie (7) and side form (8), (9) mutual driving fit to be become the die cavity (ZH) of integral automobile aluminum-alloy wheel mould.A side of driving fit side is provided with casting system (ZH mutually in two side forms (8), (9)
1), with the die cavity (ZH) that fills the pattern tool.Be provided with rising head (ZH in wheel mounting disc position
2), utilize rising head (ZH
2) C when the ccontaining additional interior alloy solution of die cavity (ZH) of alloy solution solidifies
1D
1The volume shrinkage mass of section.Be provided with side riser (ZH at the wheel rim top
3), utilize side riser (ZH
3) B when the ccontaining additional interior alloy solution of die cavity (ZH) of alloy solution solidifies
1A
1The volume shrinkage mass of section.At side riser (ZH
3) top is laid with four opening (ZH
4), so that the exhaust of alloy solution when casting mould and the type situation of filling of observing alloy solution.Alloy solution fills type finish after, alloy solution is from C
1To D
1And B
1To A
1The both direction consecutive solidification, rising head (ZH
2) and side riser (ZH
3) in ccontaining alloy solution under the self gravitation effect respectively to C
1D
1Section and B
1A
1The section feeding.Little rising head (the ZH of aluminium alloy density
2) and side riser (ZH
3) in the feeding pressure that provides of ccontaining alloy solution less relatively (be generally 0.02～0.03MPa), alloy solution solidification and crystallization crystal grain is bigger.Alloy solution is at wheel rim B
1A
1Section to fill type liquid flow path direction identical with the direction that this section alloy solution solidifies, the middle B of die cavity (ZH)
1A
1The Temperature Distribution of section alloy solution is to go up low height, is unfavorable for that alloy solution is from B
1To A
1The direction consecutive solidification makes wheel rim B partly
1Easily produce shrinkage porosite gas leakage defective after place's machined, cause scrapping of foundry goods.Side riser (ZH
3) to take a large amount of alloy solutions, arrange the special rising head manufacturing procedure of going, reduced the utilization rate of alloy solution, the melting and the machine that have increased alloy solution add cost.The final demoulding of foundry goods is that the oil cylinder drive upper mould fixed plate (3) of casting machine moves upward patrix (6) and foundry goods together, up to casting machine dnockout piece (1) and foundry goods side riser (ZH
3) end face contact, patrix (6) continues to move upward and foundry goods is taken off from patrix (6) fall into casting machine receiver (5).Because of knockout press all acts on rim bead rising head (ZH
3) end face, casting pressing port (ZH when casting temperature is higher
2) ejection resistance bigger, easily cause the mounting disc position along axis direction skew distortion.This kind distortion does not require to the front that mach integral automobile aluminum-alloy wheel is difficult in the subsequent handling and eliminates, has a strong impact on the wheel quality.
Summary of the invention
In order to overcome the deficiency of existing integral automobile aluminum-alloy wheel metal pattern gravitational casting shaped device, the utility model provides a kind of novel gravity casting piezocrystallization shaped device.
The purpose of this utility model is achieved in that the actions such as folding pickup that realize mould with former gravity casting machine, to establishing insulated feeder and rising head pressue device, patrix are provided with liftout attachment, at the cross gate place of die casting system strong water cooling plant are set in the mounting disc position of integral automobile aluminum-alloy wheel.Alloy solution steadily enters die cavity through casting system under open gravity casting state, the strong water cooling plant that mould two side form casting system cross gate places are provided with solidifies the alloy solution of casting system at the cross gate place, alloy solution in the casting mold is in the die cavity of sealing, and the rising head pressue device begins to rising head end face pressurization pressurize by delay time, pressing speed and the dwell pressure of prior setting.Alloy solution in the die cavity is in the direction consecutive solidification of gas pressure lower edge ABCD.After alloy solution was frozen into foundry goods, foundry goods was deviate from from patrix under two downward active forces that patrix liftout attachment and rising head pressue device provide.Reach and make the foundry goods coagulating tissue dense, demoulding distortion is little, improves the utilization rate of alloy solution and reduces the effect of machined cost.
Scheme of the present utility model comprises mould and the general Gravity casting machines through reequiping.Described mould mainly comprises the strong water cooling plant of side form cross gate, venting plug, push rod plate and push rod pressing plate, stud, guide pillar, push rod plate lining, rising head pressue device, release link, push rod, detecting liquid level head, upper die and lower die seat, counterdie, upper and lower mould closing pin, upper mold core, rising head seat, ceramic riser buss, rising head pad, thermocouple, side form, patrix is fixed on the upper mould fixed plate of casting machine by guide pillar, counterdie is fixed in by die shoe on the following machine bench of casting machine, and two side forms are fixed in respectively on the two side form fixed heads of casting machine accordingly; Described mould utilizes the casting machine oil cylinder that upper die and lower die and the mutual driving fit of side form are become the die cavity of mould, and the side in the mutual driving fit of two side forms side is provided with casting system, is provided with rising head in the centre position; The strong water cooling plant of side form cross gate that has the alloy solution with the cross gate place solidify rapidly in the cross gate position of two side form casting systems of described mould; At uniform venting plug and two the detecting liquid level heads of surveying the alloy solution position of discharging gas in the mold cavity in the some alloy solution cavity filling process that are provided with of the patrix end face of described mould; Patrix end face at described mould is equipped with guide pillar that is connected with the casting machine upper mould fixed plate and the liftout attachment that foundry goods is ejected from patrix; Rising head seat, insulated feeder device and rising head ftercompction device are installed on the upper mold core of described mould; Adding of rising head pressue device at described mould is provided with air inlet pipe and blast pipe and central intake pipe on the press bed.
The strong water cooling plant of described side form cross gate is respectively to establish a square mold insert in the cross gate position of two side form casting systems, respectively process two circular holes that interconnect in the adjacent two sides of mold insert, again with the stifled weldering of the end face of circular hole, make and form inverted "L" shaped water channel in the mold insert, establish gas thread tube connector joint at the two ends of water channel, pipe joint is connected with outlet pipe with water inlet pipe respectively, and water inlet pipe connects the break-make that the electromagnetism check valve is controlled cooling water; Mold insert is by at square stepped hole of processing on the side form and arm-tie and be bolted on the side form.The sidewall of mold insert directly contact with the alloy solution of side form casting system cross gate position, can be rapidly during the interior water channel feeding cooling water of mold insert the alloy solution at cross gate place be solidified, and the alloy solution in the casting mold is in the die cavity of sealing.
Described detecting liquid level head mainly comprises insulating ceramics cover, conduction steel core; The detecting liquid level head is by heavy stand hole and the pressing plate processed on the patrix and be bolted on the patrix, and the conduction steel core of detecting liquid level head stretches into the die cavity end face; Two detecting liquid level heads that are provided with on the patrix are connected with 24 volts safety power supply, alarm, signal generator and are constituted the liquid detection device of surveying the alloy solution position.When alloy solution filled type to the mold cavity end face, two detecting liquid level heads were connected by alloy solution, and alarm sends warning, and signal generator sends signal and gives designated components.
The patrix end face of described mould is installed some guide pillars, and guide pillar one end is connected with patrix by stud, and the other end is connected with the casting machine upper mould fixed plate.Guide pillar promptly has the effect that connects patrix and casting machine upper mould fixed plate to provide guide effect for sliding up and down of liftout attachment again.
The liftout attachment of described patrix mainly comprises push rod plate and push rod pressing plate, push rod plate lining, some push rods and release link, push rod plate and push rod pressing plate slide up and down along guide pillar by push rod plate lining, and push rod and release link fixing on push rod plate and the push rod pressing plate run through patrix; The position of release link overlaps with upper and lower mould dowel hole position, and the end face that release link just in time falls into the upper and lower mould closing pin when patrix and counterdie matched moulds drives the push rod plate and thimble resets.
Described insulated feeder device mainly comprises ceramic riser buss, rising head pad; The pottery riser buss is fixed between ftercompction support and the rising head pad, and ceramic rising head is with good heat insulation effect, guarantees alloy solution final set ccontaining in the rising head; Ftercompction gas filtration core holds out against ceramic riser buss end face by asbestos pad, make the bottom surface of ceramic riser buss protrude 2 millimeters of the bottom surfaces of rising head pad, because of asbestos pad is compressible, the applying of the rising head pad of having guaranteed to install rising head pressue device and ceramic riser buss pottery riser buss bottom surface and rising head seat end face when being bolted on the rising head seat; Pottery riser buss bottom surface diameter of bore is littler 1 millimeter than rising head seat end face diameter of bore, and having avoided ceramic riser buss and rising head seat joint place to produce barb influences the demoulding; Add press bed and rising head pad, the rising head pad increases temperature the sealing gasket sealing with the position that cooperates of rising head seat; The rising head seat is by being bolted on the upper mold core, and rising head seat sidewall is established the temperature of rising head bottom in the thermocouple measurement casting solidification process and determined the die sinking time.
The air admission hole that adds press bed one end of described rising head pressue device is established gas thread and is connected successively with pipe joint 1, insulating tube, electric heater, pressure sensor 1, magnetic valve 1, needle-valve; Pressure sensor 1, magnetic valve 1 and needle-valve are realized the adjusting to gas pressure size in pressing speed that feeds gas-pressurized in the rising head and the rising head; It is high-temperature gas to feeding the heating and the insulation of gas-pressurized in the rising head thereby make the gas-pressurized that feeds in the rising head that electric heater and insulating tube are realized, improves the feeding capacity of ccontaining alloy solution in the rising head in proper order.
The other end welding exhaust nozzle that adds the press bed air admission hole of described rising head pressue device, gas filtration core and stainless steel screen pack are installed in the centre.Exhaust nozzle is the steel pipe that two steam vents are respectively opened in stifled weldering both sides, bottom surface; The uniform exhaust hole of gas filtration core middle part processing; Exhaust nozzle, gas filtration core and stainless steel screen pack realize that gas-pressurized is the end face pressurization of alloy solution in the feeding rising head of disperse; So can reduce alloy solution ccontaining in the rising head greatly and be subjected to the surface that influences of gas-pressurized to solidify crust in advance, thereby influence the transmission of alloy solution pressure, reduce the effect of alloy solution crystallization and freezing under pressure.
The press bed center air admission hole one end welding center steel pipe that adds of described rising head ftercompction device gos deep in the ceramic riser buss, realizes the cooling of residue alloy solution in the rising head and quickens the contraction of solidified superalloy solution in the rising head, reduces rising head center ejection resistance; The other end is established gas thread and is connected with pipe joint 2, magnetic valve 2 and pressure sensor 2, magnetic valve 2 and pressure sensor 2 is added in the adjusting of gas pressure size in the rising head when realizing the foundry goods demoulding, thus during the demoulding of control foundry goods in the rising head gas act on the size of knockout press in the mounting disc.
The sidewall of described central rising head seat is established the temperature of rising head bottom in the thermocouple measurement casting solidification process, send signal when the temperature that records the bottom of rising head in the casting solidification process when thermocouple reaches preset value and move, to improve the automaticity of casting process to designated components.
The beneficial effects of the utility model are that alloy solution steadily enters die cavity at open gravity casting state, effectively reduces defectives such as producing volume gas, slag inclusion in cavity filling process; Alloy solution provides at the rising head pressue device that consecutive solidification becomes foundry goods in the near closed hollow ring of 0.8～1.3MPa gas pressure, makes the coagulating tissue densification of foundry goods than the traditional gravity casting, and mechanical performance and surface quality are good; The gas pressure effect bottom knockout that foundry goods provides at the some push rods and the rising head pressue device of circumference uniform distribution, knockout press is even, and foundry goods demoulding distortion is little, especially can effectively reduce the distortion of foundry goods mounting disc axial dipole field; Mould is produced on existing casting machine, and it is low, simple in structure that expense is adjusted in scrap build.
Description of drawings:
Fig. 6 is the C-C cross sectional view of the utility model die drawing 7;
Fig. 7 is the utility model mould vertical view;
Fig. 8 is the enlarged drawing of D among Fig. 7;
Fig. 9 is the E-E sectional view of Fig. 7;
Figure 10 is the enlarged drawing of F among Fig. 7;
Figure 11 is the utility model rising head pressue device pneumatic system diagram;
Figure 12 is the utility model rising head gas pressurized process curve figure;
Figure 13 is the whole front view of the utility model;
Below in conjunction with accompanying drawing the utility model is described in further detail.
The utility model gravity casting piezocrystallization shaped device comprises mould and the general Gravity casting machines through reequiping.
As Fig. 6, shown in Figure 7: mould mainly comprises the strong water cooling plant of (11) side form cross gate, (12) venting plug, (13) push rod plate and push rod pressing plate, (14) stud, (15) guide pillar, (16) push rod plate lining, (17) rising head pressue device, (18) release link, (19) push rod, (20) detecting liquid level head, (21) patrix, (22) die shoe, (23) counterdie, (24) upper and lower mould closing pin, (25) upper mold core, (26) rising head seat, (27) ceramic riser buss, (28) rising head pad, (29) thermocouple, (30) (31) side form, and the die cavity of mould (ZHa), casting system (ZH
A1) and rising head (ZHa
2).
As Fig. 6, Fig. 7, shown in Figure 8: the strong water cooling plant of side form cross gate (11) is by at two side forms (30), (31) casting system (ZHa
1) the cross gate position respectively establish a square mold insert (35).Respectively process two circular holes that interconnect in the adjacent two sides of mold insert (35),, make to form inverted "L" shaped water channel in the mold insert, establish gas thread tube connector joint at the two ends of water channel again with the stifled weldering of the end face of circular hole.The two ends of water channel are connected with outlet pipe with water inlet pipe respectively by pipe joint, and water inlet pipe connects the break-make that the electromagnetism check valve is controlled cooling water.Mold insert (35) is by being fixed on the side form at the square stepped hole of processing on the side form and arm-tie (33) and bolt (34).At side form casting system (ZHa
1) to establish strong water cooling plant be in order can be after casting is finished rapidly the alloy solution at cross gate place to be solidified in the cross gate position, make the alloy solution in the mold cavity be in closed state, so that rising head pressue device (17) pressurization makes the alloy solution crystallization and freezing under pressure in the mold cavity.
As Fig. 6, shown in Figure 7: detecting liquid level head (20) is established in the end face pitch circle position of patrix (21) die cavity.Detecting liquid level head (20) comprises (36) insulating ceramics cover, (37) conduction steel core composition shown in figure nine.Detecting liquid level head (20) is gone up the heavy stand hole of processing and pressing plate (39) and bolt (38) by patrix (21) and is fixed on the patrix (21).Patrix (21) is gone up two detecting liquid level heads (20) of setting and 24 volts safety power supply, alarm, signal generator is composed in series liquid detection device.When alloy solution arrived the die cavity end face, two detecting liquid level heads (20) were switched in the mould cavity filling process, and alarm sends warning, and signal generator sends signal and gives designated components.
As shown in Figure 6: the uniform some venting plugs (12) that are provided with of patrix (21) end face, discharge the gas in the mold cavity in the alloy solution stamp process smoothly.
As Fig. 6, shown in Figure 13: guide pillar (15) one ends are connected with patrix (21) by stud (14), and the other end is connected with casting machine upper mould fixed plate (3).
As Fig. 6, shown in Figure 7: the uniform some push rods (19) that are provided with of patrix (21) end face, push rod (19) is fixed on push rod plate and the push rod pressing plate (13) and runs through patrix (21), push rod plate and push rod pressing plate (13) slide up and down along guide pillar (15) by push rod plate lining (16), thereby drive push rod (19) action.Establish release link (18) on push rod plate and the push rod pressing plate (13), the position of release link (18) overlaps with upper and lower mould dowel hole position, and the dowel hole of patrix (21) is processed into through hole, and the aperture is slightly larger than the release link diameter.Release link (18) just in time falls into the end face of upper and lower mould closing pin (24) when patrix (21) and counterdie (23) matched moulds, realizes resetting to push rod plate and push rod pressing plate (13) and push rod (19).
As shown in Figure 6: to the uniform wheel rim AB of wall thickness position, make the wall thickness of foundry goods increase 1.5～2.2 millimeters for different up and down big or small allowance, the wall thickness of foundry goods is fit to from A from A2 to B2 ladder by patrix (21) and side form (30) (31) correspondence position
2To B
2The requirement of direction consecutive solidification.
As Fig. 6, Fig. 7, shown in Figure 11: rising head pressue device (17) comprises that (40) add press bed, (41) asbestos pad, (42) exhaust nozzle, (43) stainless steel screen pack, (44) gas filtration core, (45) pipe joint 1, (46) center steel pipe, (47) insulating tube, (48) pipe joint 2, (49) central intake pipe, (50) pipe joint 3, (51) side exhaust pipe, (52) elevated-temperature seal pad, (53) needle-valve, (54) magnetic valve 1, (55) pressure sensor 1, (56) electric heater, (57) magnetic valve 2, (58) pressure sensor 2, (59) magnetic valve 3.Add press bed (40) end face peripheral position and establish air admission hole and steam vent, centre bit installs the center air admission hole.Air admission hole one end is established gas thread and is connected with pipe joint 1 (45), other end welding exhaust nozzle (42).Exhaust nozzle (42) is the steel pipe that two steam vents are respectively opened in stifled weldering both sides, bottom surface, and exhaust nozzle (42) can make gas-pressurized prolong circumferencial direction and enter the inner chamber that adds press bed (40).Steam vent is to go up the processing one horizontal vertical hole of Kong Yuyi and connect to form adding press bed (40), the stifled weldering of horizontal Kong Yiduan, and vertical Kong Yiduan establishes gas thread and is connected with pipe joint 3 (50).Air admission hole one end in center is established gas thread and is connected with pipe joint 2 (48), and other end welding center steel pipe (46) gos deep in the ceramic riser buss (27).Gas filtration core (44) by bolt with add press bed (40) and be connected, stainless steel screen pack (43) is fixed on gas-pressurized and crosses on the filter core (44), the uniform exhaust hole of gas filtration core (44) middle part processing, gas-pressurized pressurizes through rising head (ZHa2) end face that enters of stainless steel screen pack (43) and gas filtration core (44) disperse.Adding press bed (40) is connected with rising head pad (28) by bolt.Pottery riser buss (27) is fixed on and adds between press bed (40) and the rising head pad (28), and ceramic riser buss (27) has good heat insulation effect, guarantees rising head (ZHa
2) in ccontaining alloy solution final set.Gas-pressurized is crossed filter core (44) and is held out against ceramic riser buss (27) by asbestos pad (41), makes the bottom surface of ceramic riser buss (27) protrude 2 millimeters of the bottom surfaces of rising head pad (28).The rising head pad (28) that installs rising head pressue device (17) and ceramic riser buss (27) because of asbestos pad (41) is compressible, has been guaranteed the applying of ceramic riser buss (27) bottom surface and rising head seat (26) end face by being bolted on the rising head seat (26).Pottery riser buss (27) bottom surface diameter of bore is littler 1 millimeter than rising head seat (26) end face diameter of bore, and having avoided ceramic riser buss (27) and rising head seat (26) joint place to produce barb influences the demoulding.Add press bed (40) and rising head pad (28), rising head pad (28) increases temperature sealing gasket (52) sealing with the position that cooperates of rising head seat (26).Rising head seat (26) is by being bolted on the upper mold core (25), and rising head seat (26) sidewall is established the temperature of rising head bottom in thermocouple (29) the measurement casting solidification process and determined the die sinking time.
Shown in Figure 11 rising head pressue device pneumatic system diagram: the constant voltage source of the gas is connected with the side air admission hole that adds press bed (40) through needle-valve (53), magnetic valve (54), pressure sensor (55), electric heater (56), insulating tube (47), pipe joint 1 (45) to be realized rising head (ZHa
2) pressurization.Gas-pressurized enters by insulating tube (47) and to add in the press bed (40) after electric heater (56) heating, through the feeding rising head (ZHa of stainless steel screen pack (43) and gas filtration core (44) disperse
2) the end face pressurization.So can effectively prevent rising head (ZHa
2) in ccontaining alloy solution be subjected to the surface solidification that influences of gas-pressurized, thereby influence the transmission of alloy solution pressure, reduce the effect of alloy solution crystallization and freezing under pressure.Needle-valve (53), magnetic valve 1 (54) and pressure sensor 1 (55) are regulated the pumping rate of gas in the control rising head pressue device and are realized rising head (ZHa
2) adjusting of interior gas dwell pressure.Magnetic valve 3 (59), side exhaust pipe (51) through pipe joint 3 (50) with add press bed (40) side steam vent and be connected and realize rising head (ZHa
2) release and the exhaust of interior gas.Rising head (ZHa
2) adjusting of interior gas pressure is shown in figure 12 rising head gas pressurized process curve figure, 0 to t1 is delay time among the figure, and the abc section is the gas pressurized process, and the cd section is the gas pressure maintaining period, and the de section is the gas stress-relief process.Can realize segmentation pressurization holding pressure control by electrical equipment control according to the situation of solidifying of alloy solution in the mold cavity to the gas pressurized pressure maintaining period of abcd section.The constant voltage source of the gas is through magnetic valve 2 (57), pressure sensor 2 (58), central intake pipe (49), pipe joint 2 (48) and add press bed (40) center air admission hole and be connected and realize rising head (ZHa
2) interior remaining alloy solution air blowing cooling and pressurization demoulding functions.Be added in rising head (ZHa when realizing the foundry goods demoulding by magnetic valve 2 (57) and pressure sensor 2 (58)
2) adjusting of interior gas pressure size controls the size of mounting disc knockout press.
As shown in figure 13: repacking is general Gravity casting machines at present, goes up mount type journey switch contact (59) at the upper mould fixed plate (3) of casting machine, goes up mount type journey switch (61) at the dnockout piece fixed head (60) of casting machine; Go up the fixed position of processing electric heater (56) at the upper mould fixed plate (3) of casting machine; Incorporate the electrical control part of detecting liquid level head (20) and strong water cooling plant of side form cross gate (11) and rising head pressue device (17) electrical apparatus control system of casting machine into, each is moved mutually realize control automatically.
Dynamic use of the present utility model is as follows:
As Fig. 6, shown in Figure 13: patrix (21) is fixed on the upper mould fixed plate (3) of casting machine, counterdie (23) is fixed on the following machine bench (4) of casting machine by die shoe (22), two side forms (30), (31) be fixed in accordingly respectively on the two side form fixed heads (2) of casting machine, the oil cylinder that utilizes casting machine is with patrix (21), counterdie (23) and side form (30), (31) mutual driving fit becomes the die cavity (ZHa) of integral automobile aluminum-alloy wheel mould, release link (18) falls into the end face of upper and lower mould closing pin (24), realizes resetting to push rod plate and push rod pressing plate (13) and push rod (19).A side of driving fit side is provided with casting system (ZHa mutually in two side forms (30), (31)
1), the die cavity (ZHa) to fill the pattern tool is provided with rising head (ZHa in the mounting disc position
2), utilize rising head (ZHa
2) ccontaining alloy solution die cavity (ZHa) A when alloy solution solidifies of replenishing mould
2B
2C
2D
2The volume shrinkage mass of section.Casting system (the ZHa that alloy solution is provided with on side form by hand teeming or mechanical hand casting
1) enter die cavity (ZHa), detecting liquid level head (20) is switched on when alloy solution fills type to the die cavity end face, liquid detection device gives the alarm or feeds back a signal and stops casting to mechanical hand, and liquid detection device sends a signal and gives strong water cooling plant of side form cross gate (11) and rising head pressue device (17) simultaneously.The strong water cooling plant of side form cross gate (11) beginning water flowing is cold by force, makes casting system (ZHa
1) alloy solution at cross gate place solidifies, and the alloy solution in the die cavity (ZHa) is in the die cavity of sealing.Rising head pressue device (17) begins to rising head (ZHa by delay time, pressing speed and the dwell pressure of prior setting
2) end face pressurization pressurize.Alloy solution in the die cavity (ZHa) is at gas pressure lower edge A
2B
2C
2D
2The direction consecutive solidification become foundry goods.Thermocouple (29) at rising head seat (26) sidewall begins to measure the rising head bottom temp, and the magnetic valve 3 (59) of the side exhaust pipe (51) of rising head pressue device (17) is opened to rising head (ZHa when temperature reaches preset value
2) release, central intake pipe (49) feeds the cooling air, cooling rising head (ZHa
2) interior remaining alloy solution and acceleration rising head (ZHa
2) in the contraction of solidified superalloy solution, reduce rising head (ZHa
2) the center ejection resistance.The casting machine oil cylinder drives side form (30) simultaneously, open (31), and patrix (21) and foundry goods are moved upward together, and the magnetic valve 3 (59) of the side exhaust pipe (51) of rising head pressue device (17) cuts out when arriving casting type journey switch (61) predeterminated position.Central intake pipe (49) continues to rising head (ZHa
2) interior bubbling air, rising head (ZHa
2) when interior gas pressurized arrived preset value, patrix (21) continued to move upward casting machine dnockout piece (1) is contacted with push rod pressing plate (13) with the push rod plate, make push rod plate and push rod pressing plate (13) drive push rod (19) and move downward.Foundry goods is taken off from patrix (21) under two downward active forces that push rod (19) and rising head pressue device (17) provide and is fallen into casting machine receiver (5).
Outstanding advantage of the present utility model is: reduced the ccontaining alloy solution volume of rising head, improved the utilization rate of alloy solution, saved cost; Alloy solution steadily enters die cavity at open gravity casting state, effectively reduced defectives such as producing volume gas, slag inclusion in the cavity filling process, alloy solution provides at the rising head pressue device that consecutive solidification becomes foundry goods in the near closed hollow ring of 0.8～1.3MPa gas pressure, make the coagulating tissue densification of foundry goods than the traditional gravity casting, mechanical performance and surface quality are good; Alloy solution is at wheel rim A
2B
2Section to fill type liquid flow path direction opposite with the direction that this section alloy solution solidifies, the middle A of die cavity (ZHa)
2B
2The Temperature Distribution of section alloy solution is to go up low height, helps alloy solution from A
2To B
2The direction consecutive solidification, effectively reduced partly B of wheel rim
2Produce the appearance of shrinkage porosite gas leakage defective after place's machined, improved the qualification rate of foundry goods; The gas pressure effect bottom knockout that foundry goods provides at the some push rods and the rising head pressue device of circumference uniform distribution, knockout press is even, and foundry goods demoulding distortion is little, especially can effectively reduce the distortion of foundry goods mounting disc axial dipole field; Mould is produced on existing casting machine, and it is low, simple in structure that expense is adjusted in scrap build; Insulated feeder and rising head pressue device are by modularized design, during the ring disk-shaped part mould development of different model and specification, as long as rising head pad (28) and rising head seat (26) are by certain standard design, insulated feeder can be shared between different moulds with the rising head pressue device, thereby reduced the development cost of mould.
Claims (10)
1. gravity casting piezocrystallization shaped device especially encircles the light alloy metal mould gravity casting piezocrystallization shaped device of disk-shaped part, comprises mould and through the general Gravity casting machines of repacking, it is characterized in that:
A. described mould mainly comprises the strong water cooling plant of side form cross gate (11), venting plug (12), push rod plate and push rod pressing plate (13), stud (14), guide pillar (15), push rod plate lining (16), rising head pressue device (17), release link (18), push rod (19), detecting liquid level head (20), patrix (21), die shoe (22), counterdie (23), upper and lower mould closing pin (24), upper mold core (25), rising head seat (26), pottery riser buss (27), rising head pad (28), thermocouple (29), side form (30) (31), patrix (21) is fixed on the upper mould fixed plate (3) of casting machine, counterdie (23) is fixed on the following machine bench (4) of casting machine by die shoe (22), two side forms (30), (31) be fixed in accordingly respectively on the two side form fixed heads (2) of casting machine, release link (18) is fixed on push rod plate and the push rod pressing plate (13) and runs through patrix (21);
B. described mould utilizes the casting machine oil cylinder patrix (21), counterdie (23) and side form (30), (31) mutual driving fit to be become the die cavity (ZH of mould
a), a side of driving fit side is provided with casting system (ZH mutually in two side forms (30), (31)
A1), be provided with rising head (ZHa in the centre position
2);
C. there is the strong water cooling plant of side form cross gate (11) that the alloy solution with the cross gate place solidifies rapidly the cross gate position of two side forms (30) of described mould, (31) casting system (ZHa1);
D. the uniform venting plug (12) of discharging gas in the mold cavity and detecting liquid level heads (20) of two detection alloy solution positions of being provided with in the some alloy solution cavity filling process of the patrix of described mould (21) end face;
E. the patrix of described mould (21) end face is equipped with guide pillar (15) that is connected with casting machine upper mould fixed plate (3) and the liftout attachment that foundry goods is ejected from patrix (21);
F., rising head seat (26), insulated feeder device and rising head ftercompction device (17) are installed on the upper mold core of described mould (25);
J. the press bed (40) that adds of the rising head pressue device (17) of described mould is provided with air inlet pipe and blast pipe and central intake pipe.
2. gravity casting piezocrystallization shaped device according to claim 1 is characterized in that the strong water cooling plant of described side form cross gate (11) is at two side forms (30), (31) casting system (ZHa
1) the cross gate position respectively establish a square mold insert (35), respectively process two circular holes that interconnect in the adjacent two sides of mold insert (35), again with the stifled weldering of the end face of circular hole, make and form inverted "L" shaped water channel in the mold insert, establish gas thread tube connector joint at the two ends of water channel, pipe joint is connected with outlet pipe with water inlet pipe respectively, and water inlet pipe connects the break-make that the electromagnetism check valve is controlled cooling water; Mold insert (35) is by being fixed on the side form at the square stepped hole of processing on the side form and arm-tie (33) and bolt (34).
3. gravity casting piezocrystallization shaped device according to claim 1 is characterized in that described detecting liquid level head (20) mainly comprises (36) insulating ceramics cover, (37) conduction steel core; Detecting liquid level head (20) is gone up the heavy stand hole of processing and pressing plate (39) and bolt (38) by patrix (21) and is fixed on the patrix (21); Two detecting liquid level heads (20) that patrix (21) upward is provided with are connected with 24 volts safety power supply, alarm, signal generator and are constituted the liquid detection device of surveying the alloy solution position.
4. gravity casting piezocrystallization shaped device according to claim 1 is characterized in that described guide pillar (15) one ends are connected with patrix (21) by stud (14), and the other end is connected with casting machine upper mould fixed plate (3).
5. gravity casting piezocrystallization shaped device according to claim 1, the liftout attachment that it is characterized in that patrix (21) mainly comprises push rod plate and push rod pressing plate (13), push rod plate lining (16), some push rods (19) and release link (18), push rod plate and push rod pressing plate (13) slide up and down along guide pillar (15) by push rod plate lining (16), and push rod plate and push rod pressing plate (13) are gone up fixing push rod (19) and release link (18) and run through patrix (21); The position of release link (18) overlaps with upper and lower mould dowel hole position, and release link (18) just in time falls into the end face of upper and lower mould closing pin (24) when patrix (21) and counterdie (23) matched moulds.
6. gravity casting piezocrystallization shaped device according to claim 1 is characterized in that described insulated feeder device mainly comprises ceramic riser buss (27), rising head pad (28); Pottery riser buss (27) is fixed between ftercompction support (40) and the rising head pad (28), ftercompction gas filtration core (44) holds out against ceramic riser buss (27) end face by asbestos pad (41), makes the bottom surface of ceramic riser buss (27) protrude 2 millimeters of the bottom surfaces of rising head pad (28).
7. gravity casting piezocrystallization shaped device according to claim 1, air admission hole one end that adds press bed (40) that it is characterized in that described rising head pressue device (17) is established gas thread and is connected successively with pipe joint 1 (45), insulating tube (47), electric heater (56), pressure sensor 1 (55), magnetic valve 1 (54), needle-valve (53), realizes feeding rising head (ZHa
2) in the heating and the rising head (ZHa of gas-pressurized
2) in the adjusting of gas pressure.
8. gravity casting piezocrystallization shaped device according to claim 1, the other end welding exhaust nozzle that adds press bed (40) air admission hole that it is characterized in that described rising head pressue device (17), gas filtration core (44) and stainless steel screen pack (43) are installed in the centre, realize that gas-pressurized is the feeding rising head (ZHa of disperse
2) in the end face pressurization of alloy solution; Exhaust nozzle (42) is the steel pipe that two steam vents are respectively opened in stifled weldering both sides, bottom surface; The uniform exhaust hole of gas filtration core (44) middle part processing.
9. gravity casting piezocrystallization shaped device according to claim 1, press bed (40) the center air admission hole one end welding center steel pipe (46) that adds that it is characterized in that described rising head ftercompction device (17) gos deep in the ceramic riser buss (27), realizes rising head (ZHa
2) interior cooling and the acceleration rising head (ZHa that remains alloy solution
2) in the contraction of solidified superalloy solution, reduce rising head (ZHa
2) the center ejection resistance; The other end is established gas thread and is connected with pipe joint 2 (48), magnetic valve 2 (57) and pressure sensor 2 (58), realizes rising head (ZHa
2) pressure of demoulding gas-pressurized regulates.
10. gravity casting piezocrystallization shaped device according to claim 1 is characterized in that the sidewall of described central rising head seat (26) is established the temperature that thermocouple (29) is measured rising head bottom in the casting solidification process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200557398U CN201108955Y (en) | 2007-08-21 | 2007-08-21 | Gravity casting piezocrystallization forming apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200557398U CN201108955Y (en) | 2007-08-21 | 2007-08-21 | Gravity casting piezocrystallization forming apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN201108955Y true CN201108955Y (en) | 2008-09-03 |
Family
ID=39893473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200557398U Expired - Fee Related CN201108955Y (en) | 2007-08-21 | 2007-08-21 | Gravity casting piezocrystallization forming apparatus |
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| CN (1) | CN201108955Y (en) |
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Address after: Room 2, No. three, Lane 201, Baihe cave, Liwan District, Guangdong, Guangzhou Province, China: 510380 Co-patentee after: He Xiaonan Patentee after: Liu Jian Gao Address before: 7, Sha Sha Road, Guangzhou, Guangdong, Haizhuqu District: 510250 Co-patentee before: He Xiaonan Patentee before: Liu Jian Gao |
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Granted publication date: 20080903 Termination date: 20110821 |