CN115026257A - Die-casting processing method of metal die casting - Google Patents
Die-casting processing method of metal die casting Download PDFInfo
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- CN115026257A CN115026257A CN202210758709.2A CN202210758709A CN115026257A CN 115026257 A CN115026257 A CN 115026257A CN 202210758709 A CN202210758709 A CN 202210758709A CN 115026257 A CN115026257 A CN 115026257A
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 156
- 239000002184 metal Substances 0.000 title claims abstract description 156
- 238000004512 die casting Methods 0.000 title claims abstract description 116
- 238000003672 processing method Methods 0.000 title claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 96
- 238000002347 injection Methods 0.000 claims abstract description 58
- 239000007924 injection Substances 0.000 claims abstract description 58
- 238000000034 method Methods 0.000 claims abstract description 33
- 230000008569 process Effects 0.000 claims abstract description 26
- 238000001816 cooling Methods 0.000 claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims description 32
- 238000001514 detection method Methods 0.000 claims description 23
- 230000007246 mechanism Effects 0.000 claims description 20
- 238000005266 casting Methods 0.000 claims description 19
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 14
- 239000000243 solution Substances 0.000 claims description 10
- 238000005452 bending Methods 0.000 claims description 7
- 239000011780 sodium chloride Substances 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 7
- 230000009471 action Effects 0.000 abstract description 7
- 238000012545 processing Methods 0.000 abstract description 4
- 239000007787 solid Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 11
- 238000009835 boiling Methods 0.000 description 9
- 238000004806 packaging method and process Methods 0.000 description 7
- 230000003031 feeding effect Effects 0.000 description 6
- 210000001503 joint Anatomy 0.000 description 6
- 238000013461 design Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 238000005429 filling process Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 229910000838 Al alloy Chemical group 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical group [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003110 molding sand Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000011701 zinc Chemical group 0.000 description 2
- 241001417490 Sillaginidae Species 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000005058 metal casting Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 208000026438 poor feeding Diseases 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/2015—Means for forcing the molten metal into the die
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/2015—Means for forcing the molten metal into the die
- B22D17/2038—Heating, cooling or lubricating the injection unit
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
- B22D17/2272—Sprue channels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/26—Mechanisms or devices for locking or opening dies
- B22D17/263—Mechanisms or devices for locking or opening dies mechanically
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/30—Accessories for supplying molten metal, e.g. in rations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/32—Controlling equipment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D2/00—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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Abstract
The invention discloses a die-casting processing method of a metal die casting, belonging to the die-casting field, which improves the original die-casting processing method of the metal die casting, wherein a movable die is pretreated before die-casting, the original solid structure is replaced by a hollow structure, hole digging processing is carried out on each thicker part of the corresponding die casting on the movable die, a backward-thrust feeding elastic part is additionally welded in a hole, after die assembly is completed, injection operation is carried out by adopting a slight excess injection mode, redundant molten metal is temporarily stored in a deformation space of the backward-thrust feeding elastic part under the action of the hydraulic pressure of the molten metal, injection is completed, the molten metal is pressurized and counteracted by the backward-thrust liquid prestored in the movable die in the cooling process of the molten metal, so that the deformation of the backward-thrust feeding elastic part is recovered to the initial state, the residual quantity of the molten metal is accurately backward-thrust to each thicker part of the die casting, and the shrinkage holes at each thicker part of the die casting are synchronously fed, effectively improve the die-casting yields of the metal die castings that the structure is complicated, and thin thick inequality.
Description
Technical Field
The invention relates to the field of die casting, in particular to a die casting processing method of a metal die casting.
Background
The die casting is a part which is generally called a die casting, and is a pressure casting mechanical die casting machine which is used for installing a casting die, and copper, zinc, aluminum or aluminum alloy parts with shapes and sizes limited by the die are cast by pouring metal such as copper, zinc, aluminum or aluminum alloy which is heated to be liquid into a feeding port of the die casting machine through die casting of the die casting machine.
In the die casting forming process, there is the problem of shrinkage porosity hole, and the reason that the shrinkage porosity hole produced is various, mainly includes the reason in the aspect of the foundry goods structure, smelts the reason in the aspect of, and the reason in the aspect of the process design, wherein the reason in the aspect of the foundry goods structure mainly includes: 1. because the section of the casting is too thick, shrinkage cavities are formed due to poor feeding, the wall thickness of the casting is not uniform, and shrinkage cavities or shrinkage porosity are generated at hot junctions at the wall thickness part; 2. because the sand core of the casting hole formed by too small diameter of the casting is heated by the high-temperature molten metal and is in a high-temperature state for a long time, the solidification speed of the metal on the surface of the casting hole is reduced, and meanwhile, the sand core provides a channel for gas or atmospheric pressure, so that the hole wall is shrunk or loosened; 3. the reentrant corner fillet radius of foundry goods is too little, makes the reentrant corner fillet radius of sharp corner department foundry goods too little, makes the light ability of sharp corner department molding sand reduce, and reentrant corner department solidification rate descends, simultaneously because sharp corner department molding sand is heated the effect by heat is strong, and it is big to send out gas pressure, and the gas that separates out can be to the infiltration of metal liquid that does not solidify, leads to the foundry goods to produce the gas shrinkage cavity.
In the die casting process of die castings with complex structures and uneven thicknesses, the first point in shrinkage porosity holes generated due to casting structure reasons particularly exists in the die castings, and the yield of the die castings is greatly influenced.
Disclosure of Invention
1. Technical problem to be solved
Aiming at the problems in the prior art, the invention aims to provide a die-casting processing method of a metal die casting, which improves the prior die-casting processing method of the metal die casting, pre-processes a movable die before die-casting, changes the prior solid structure into a hollow structure, performs hole digging processing on each thicker part of the corresponding die casting on the movable die, and performs welding of a reverse thrust feeding elastic part in a hole, when die assembly is completed and injection is performed, injection operation is performed in a micro-excess injection mode, redundant molten metal can be temporarily stored in a deformation space of the reverse thrust feeding elastic part through the deformation of the reverse thrust feeding elastic part under the action of the molten metal, and the deformation of the reverse thrust feeding elastic part is recovered to an initial state through pressurizing and storing the reverse thrust liquid in the movable die in advance in the process of cooling the molten metal after injection operation is completed, in the deformation recovery process, the metal liquid allowance is accurately pushed back to each thick part of the die casting, shrinkage cavities at the thick parts of the die casting are synchronously fed, and the die casting yield of the metal die casting with a complex structure and uneven thickness is effectively improved.
2. Technical scheme
In order to solve the above problems, the present invention adopts the following technical solutions.
A die-casting processing method of a metal die casting comprises the following steps:
s1, hole digging and welding: before die assembly, correspondingly digging holes in the thick part of a die casting on a movable die, and welding a reverse thrust feeding elastic part in the holes;
s2, die assembly: the mold closing mechanism is started to close to form a cavity;
s3, micro-excess injection: pushing excessive molten metal at a specified speed through an injection mechanism, enabling the excessive molten metal to flow through a die cavity formed after the die closing mechanism is closed by sufficient energy, and maintaining a certain pressure to transmit the excessive molten metal to the solidifying molten metal;
s4, micro-motion deformation: the metal hydraulic pressure generated by the excessive metal liquid reversely pushes the feeding elastic piece to extrude and deform, and the excessive metal liquid is temporarily stored in the deformation space;
s5, reverse feeding: pressurizing a reverse thrust liquid stored in a movable mould in advance in the molten metal cooling process, offsetting the hydraulic pressure of the molten metal, restoring the deformation of the reverse thrust feeding elastic part to an initial state, and performing fixed-point feeding on the wall thickness part of the die casting through the allowance of the molten metal at the reverse thrust feeding elastic part in the deformation restoration process;
s6, casting pushing: and pushing out the die casting subjected to reverse feeding from the cavity by using a core-pulling device and collecting the die casting.
Further, the mold clamping mechanism in the step S2 includes a moving mold base plate and a fixed mold which are symmetrically distributed left and right, the core pulling device in the step S6 is fixedly installed in the moving mold base plate, the moving mold is fixedly installed at the front end of the moving mold base plate, the heating device in the step S5 is fixedly installed at the top end of the moving mold base plate, a plurality of through pipes are fixedly installed between the moving mold and the heating device, the back-thrust liquid is stored in the heating device, the through pipes and the moving mold in advance, the top end of the heating device is fixedly connected with a pressure pipe, the pressure pipe is externally connected with a pressure device, the heating device is used for heating the back-thrust liquid stored in the heating device, the through pipes and the moving mold, when the temperature of the back-thrust liquid is heated to the metal hydraulic casting temperature, the metal hydraulic pressure is injected into the mold cavity through the injection mechanism, and the back-thrust hydraulic pressure and the metal hydraulic pressure are offset through the pressure device, the effect of completing injection of molten metal and actively feeding in the cooling process is achieved, the phenomenon that the liquid is cooled in the process that the molten metal is injected into the cavity by the reverse-pushing liquid is effectively avoided, the fluidity of the molten metal is influenced, the possibility of influencing the die casting quality of die castings with complex shapes and structures is further improved, and the yield is further improved.
Furthermore, a plurality of high temperature resistant packaging intelligent deformation detection strips are fixedly installed at the end wall of one side of the reverse feeding elastic part in the moving die in the step S1, deformation quantity of the reverse feeding elastic part is monitored in real time through the high temperature resistant packaging intelligent deformation detection strips, so that the reverse feeding elastic part can be really changed from a bending state to a vertical state after active feeding is completed, reverse feeding hydraulic pressure and molten metal can reach a relatively good balance state through monitoring of the high temperature resistant packaging intelligent deformation detection strips, the situation that the reverse feeding hydraulic pressure is smaller than the molten metal pressure and cannot reach a good feeding effect is effectively avoided, the situation that the die casting is sunken inwards at a thick part is possible due to the fact that the reverse feeding hydraulic pressure is larger than the molten metal pressure, a good balance effect is obtained at two points of active feeding and shaping, and the shape complexity is further improved, and the die casting yield with uneven thickness is high.
Further, the back-pushing liquid in step S5 is a liquid sodium chloride solution, and the liquid sodium chloride solution has a higher boiling point, so as to reduce the possibility that the back-pushing liquid boils during the heating process and the heating temperature is matched with the temperature of the metal liquid, which affects the back-pushing of the back-feeding elastic member.
Furthermore, the reverse-thrust feeding elastic part has certain bending strength, so that the reverse-thrust feeding elastic part is pre-pressurized into the movable die through an external adding device, the boiling point of the reverse-thrust liquid is further improved, and the possibility of the occurrence of the condition that the reverse-thrust feeding elastic part is influenced by the boiling of the reverse-thrust liquid in the heating process and the process of matching the heating temperature with the temperature of the metal liquid is further reduced.
Furthermore, the injection mechanism of the step S3 includes an injection pipe, an injection nozzle, and an injection push rod connected to an external pushing mechanism, the injection pipe penetrates through the fixed mold and is communicated with a cavity formed after the fixed mold and the movable mold base plate are assembled, the injection nozzle is fixedly mounted on the upper side of the outer end wall of the injection pipe close to the fixed mold, a push head portion of the injection push rod is movably sleeved on the inner end wall of the injection pipe, the molten metal is first poured into the injection pipe through the injection nozzle, and then the injection push rod is started to push the molten metal to fill the whole cavity in a slow-speed-to-fast manner, so that air in the cavity can be smoothly discharged, the molten metal can also completely fill the cavity, the shape of the casting can be ensured to be complete, and the yield of the casting can be further improved.
Furthermore, the filling nozzle is funnel-shaped structure to in making the metal liquid can be smoothly and quick pour into the filling pipe, reduce the possibility that the condition of metal liquid in pouring into the filling pipe internal cooling from the filling nozzle takes place, improve the metal liquid mobility, so that the cavity is filled to the metal liquid can be more smoothly.
Furthermore, locking pins are fixedly mounted at four corners of one end, close to the fixed die, of the movable die base plate, locking holes are formed in the position, corresponding to the locking pins, of the fixed die, the locking pins can automatically complete butt joint with the corresponding locking holes after the movable die base plate and the fixed die are assembled, strong hydraulic pressure formed when molten metal is rapidly filled in the cavity is resisted through strong die locking force formed after the locking pins and the locking holes are in butt joint, and stability of the cavity in the molten metal filling process is guaranteed.
Further, a plurality of ventholes have evenly been seted up to the cover half near movable mould bedplate one end upside, the venthole link up die cavity environment and external environment mutually to make the interior gas of die cavity can discharge smoothly at the molten metal filling in-process, the venthole is narrow outer wide funnel shaped structure in, can fill up whole die cavity smoothly in order to guarantee the molten metal, the molten metal originally is exactly overfilled, this scheme is exactly to utilize overfilled molten metal, reach the effect of initiative feeding, the molten metal is after the completion of the intussuseption in the die cavity, excessive molten metal can be gone into in the inlet port and form the mouth of a river in the cooling process, because the narrow outer wide funnel shaped design in the venthole, make the mouth of a river can be more smooth by the cutting polish and get rid of.
Furthermore, the lower side of a cavity generated after the movable die base plate and the fixed die are assembled is provided with detection liquid, the detection liquid is filled in the cavity, the buoyancy value of the detection liquid is regulated in advance, so that the finished die casting product is in an original descending state in the detection liquid, and if the die casting product is not well fed in the die casting process, the internal holes are more, the finished die casting product can float upwards in the detection liquid, and an operator can quickly judge the feeding effect by observing the ascending and descending state of the die casting product in the detection liquid.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
(1) the scheme improves the original die casting processing method of the metal die casting, the movable die is pretreated before die casting, the original solid structure is replaced by a hollow structure, hole digging processing is carried out on each thicker part of the corresponding die casting on the movable die, a reverse-thrust feeding elastic part is additionally welded in the holes, when die assembly is completed and injection is carried out, injection operation is carried out in a slight excess injection mode, redundant metal liquid can be temporarily stored in a deformation space of the reverse-thrust feeding elastic part through deformation of the reverse-thrust feeding elastic part under the action of metal liquid pressure, after injection operation is completed, the metal liquid is pressurized through the reverse-thrust liquid prestored in the movable die to counteract the metal liquid pressure, so that the reverse-thrust feeding elastic part is deformed and restored to an initial state, and in the deformation restoration process, the metal liquid allowance is accurately reversely pushed to each thicker part of the die casting, the shrinkage cavities at the thicker parts of the die castings are synchronously fed, so that the die casting yield of the metal die castings with complex structures and uneven thickness is effectively improved.
(2) Through heating device to heating device, the backstepping liquid that stores jointly in through pipe and the movable mould heats, when the backstepping liquid temperature heats the hydraulic metal casting temperature, just go into the die cavity with the hydraulic metal through pressing the mechanism of penetrating, and make backstepping hydraulic pressure and hydraulic metal offset through supercharging device, reach and penetrate the completion at the hydraulic metal, the effect of initiative feeding in the cooling process, effectively avoid the backstepping liquid to penetrate to the in-process of die cavity at the hydraulic metal and cool off it, cause the influence to the molten metal mobility, and then the possibility that the condition that produces the influence to the die casting die-casting quality that the shape structure is complicated takes place, further improve the yields.
(3) The end wall of one side of the reverse feeding elastic part in the moving die is fixedly provided with a plurality of high-temperature-resistant packaging intelligent deformation detection strips, deformation quantity of the reverse feeding elastic part is monitored in real time through the high-temperature-resistant packaging intelligent deformation detection strips, so that the reverse feeding elastic part can be really changed from a bending state to a vertical state after active feeding is completed, reverse hydraulic pressure and molten metal can reach a relatively good balance state through monitoring of the high-temperature-resistant packaging intelligent deformation detection strips, the situation that the reverse hydraulic pressure is smaller than the molten metal pressure and cannot reach a good feeding effect is effectively avoided, the reverse hydraulic pressure is larger than the molten metal pressure, the possibility that the die casting is sunken inwards at a thick part is caused, a good balance effect is obtained at two points of active feeding and shaping, and the shape complexity is further improved, and the die casting yield is uneven.
(4) Liquid sodium chloride solution is adopted as the reverse pushing liquid, and the boiling point of the liquid sodium chloride solution is high, so that the possibility that the reverse pushing liquid boils in the heating process and the process of matching the heating temperature with the temperature of the metal liquid and the condition of influencing the reverse pushing of the reverse-pushing feeding elastic piece is reduced.
(5) The reverse-thrust feeding elastic piece has certain bending strength, so that the reverse-thrust liquid boiling point is further improved by pre-pressurizing the inside of the movable die through an external adding device, and the possibility of the occurrence of the condition that the reverse thrust of the reverse-thrust feeding elastic piece is influenced by the boiling of the reverse-thrust liquid during heating and the matching process of the heating temperature and the metal liquid temperature is further reduced.
(6) The molten metal is firstly poured into the filling pipe through the filling nozzle, and then is started through the injection push rod to push the molten metal to fill the whole cavity according to a mode of slow speed firstly and fast speed secondly, so that the air in the cavity can be smoothly discharged, the cavity can be completely filled with the molten metal, the shape of a casting is complete, and the yield of the casting is further improved.
(7) The filling nozzle is of a funnel-shaped structure, so that the molten metal can be smoothly and quickly filled into the filling pipe, the possibility of the occurrence of the cooling condition of the molten metal in the filling pipe filled from the filling nozzle is reduced, the fluidity of the molten metal is improved, and the cavity can be filled with the molten metal more smoothly.
(8) The movable mould bedplate is close to the equal fixed mounting in cover half one end four corners and has the stop pin, and the cover half all matches in the position department that corresponds with the stop pin and is equipped with the locking hole, and the stop pin is in movable mould bedplate and cover half compound die completion back, can be automatic and the butt joint is accomplished to the locking hole corresponding with it, and the powerful hydraulic pressure that forms when coming the counter metal liquid fast filling in the die cavity is guaranteed to the powerful clamping force that forms through stop pin and locking hole butt joint back, die cavity stability among the metal liquid filling process.
(9) A plurality of ventholes have evenly been seted up to the cover half near movable mould bedplate one end upside, the venthole link up die cavity environment and external environment mutually, so that gas can discharge smoothly at the metal liquid filling in-process in the die cavity, the venthole is interior narrow outer wide hourglass hopper-shaped structure, can fill up whole die cavity smoothly in order to guarantee the metal liquid, the metal liquid is originally that overfill, this scheme is exactly to utilizing the metal liquid of overfill, reach the effect of initiative feeding, the metal liquid is after the completion of the intussuseption in the die cavity, excessive metal liquid can be gone into in the inlet port and form the mouth of a river in the cooling process, because the interior narrow outer wide hourglass hopper-shaped design of venthole, make the mouth of a river can be more smooth by the cutting polish and get rid of.
(10) The die cavity downside that produces after movable mould bedplate and the cover half compound die is equipped with, and the intussuseption is filled with and detects liquid, regulates and control in advance through the buoyancy value to detecting liquid for the die casting finished product is in detecting the original decline state in liquid, and if the die casting is not the feeding well when die-casting, inside hole is more, and then the die casting finished product can come up in detecting the liquid, and operating personnel accessible observes the die casting and comes the rapid judgement feeding effect in the decline state that comes up in detecting liquid.
Drawings
FIG. 1 is a flow chart of a method of the present invention;
FIG. 2 is a schematic view of the overall structure of the present invention;
FIG. 3 is a schematic overall second perspective view of the present invention;
FIG. 4 is an overall cross-sectional view of the present invention;
FIG. 5 is a view showing a connection relationship between a heating apparatus and a movable mold according to the present invention;
FIG. 6 is an overall cross-sectional elevation view of the present invention;
FIG. 7 is a diagram showing the state that the movable mold and the fixed mold are assembled and the metal liquid is injected excessively, and then the reverse thrust feeding elastic part is deformed under the action of the metal liquid;
FIG. 8 is a schematic view of the structure at A of FIG. 7;
FIG. 9 is a diagram illustrating the deformation recovery of the thrust-reversing feeding elastic member under the action of thrust-reversing hydraulic pressure;
fig. 10 is a schematic structural view at B of fig. 9.
The reference numbers in the figures illustrate:
1. a movable mould seat plate; 101. a core pulling device; 102. a locking pin; 103. moving the mold; 1031. reversely pushing the feeding elastic piece; 104. high temperature resistant packaging intelligent deformation detection strip; 105. a through pipe; 106. a heating device; 1061. a pressure increasing pipe; 2. fixing a mold; 201. a filling pipe; 202. a filling nozzle; 203. injecting a push rod; 204. a locking hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is to be understood that the embodiments described are merely exemplary embodiments, rather than exemplary embodiments, and that all other embodiments may be devised by those skilled in the art without departing from the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
referring to fig. 1-2 and 4-10, a method for die-casting a metal die-casting includes the following steps:
s1, hole digging and welding: before die assembly, correspondingly digging a hole at the thicker part of a die casting on the movable die 103, and welding a reverse thrust feeding elastic part 1031 in the hole;
s2, die assembly: the mold closing mechanism is started to close to form a cavity;
s3, micro-excess injection: pushing excessive molten metal at a specified speed through an injection mechanism, enabling the excessive molten metal to flow through a die cavity formed after the die closing mechanism is closed by sufficient energy, and maintaining a certain pressure to transmit the excessive molten metal to the solidifying molten metal;
s4, micro-motion deformation: the metal hydraulic pressure generated by the excessive metal liquid will reversely push the feeding elastic member 1031 to deform, and the excessive metal liquid is temporarily stored in the deformation space;
s5, reverse feeding: in the molten metal cooling process, the thrust reverser stored in the movable die 103 in advance is pressurized, the hydraulic pressure of the metal is counteracted, the deformation of the thrust reverser feeding elastic piece 1031 is restored to an initial state, and in the deformation restoration process, the fixed-point feeding is carried out on the wall thickness part of the die casting through the allowance of the molten metal at the thrust reverser feeding elastic piece 1031;
s6, casting pushing: and pushing the die casting subjected to reverse feeding out from the cavity by the core pulling device 101 and collecting.
The invention improves the original die casting processing method of the metal die casting, the movable die 103 is pretreated before die casting, the original solid structure is replaced by a hollow structure, hole digging processing is carried out on each thicker part of the corresponding die casting on the movable die 103, a reverse thrust feeding elastic part 1031 is additionally welded in a hole, when die assembly is completed and injection is carried out, injection operation is carried out in a slight excess injection mode, redundant metal liquid can be temporarily stored in a deformation space of the reverse thrust feeding elastic part 1031 through the deformation of the reverse thrust feeding elastic part 1031 under the action of metal hydraulic pressure, the reverse thrust liquid stored in the movable die 103 in advance is pressurized to counteract the metal hydraulic pressure in the metal liquid cooling process after the injection action is completed, so that the deformation of the reverse thrust feeding elastic part 1031 is recovered to the initial state, and the metal liquid allowance is accurately reversely pushed to each thicker part of the die casting in the deformation recovery process, the shrinkage cavity at the thicker part of the die casting is synchronously fed, so that the die casting yield of the metal die casting with a complex structure and uneven thickness is effectively improved.
Referring to fig. 4-7, the mold clamping mechanism in step S2 includes a movable mold base plate 1 and a fixed mold 2 which are symmetrically distributed left and right, the core pulling device 101 in step S6 is fixedly installed in the movable mold base plate 1, the movable mold 103 is fixedly installed at the front end of the movable mold base plate 1, the heating device 106 in step S5 is fixedly installed at the top end of the movable mold base plate 1, a plurality of through pipes 105 are fixedly installed between the movable mold 103 and the heating device 106, the thrust reverser is stored in the heating device 106, the through pipe 105 and the movable mold 103 in advance, the top end of the heating device 106 is fixedly connected with a pressure increasing pipe 1061, the pressure increasing pipe 1061 is externally connected with a pressure increasing device, the thrust increasing device 106 heats the thrust increasing liquid stored in the heating device 106, the through pipe 105 and the movable mold 103, when the temperature of the thrust increasing liquid is heated to the metal liquid pressure casting temperature, the metal liquid is injected into the mold cavity by the pressure increasing device, and the thrust increasing device cancels the thrust increasing liquid pressure increasing, the effect of completing injection of molten metal and actively feeding in the cooling process is achieved, the phenomenon that the liquid is cooled in the process that the molten metal is injected into the cavity by the thrust reverser is effectively avoided, the fluidity of the molten metal is influenced, the possibility of influencing the die casting quality of die castings with complex shapes and structures is further improved, and the yield is further improved.
Referring to fig. 8 and 10, in step S1, a plurality of high temperature resistant packaged intelligent deformation detection strips 104 are fixedly installed at the end wall of the reverse feeding elastic member 1031 located at one side of the movable mold 103, and the deformation amount of the reverse feeding elastic member 1031 is monitored in real time by the high temperature resistant packaged intelligent deformation detection strips 104, so that the reverse feeding elastic member 1031 can be really changed from the bending state to the vertical state after the active feeding is completed, so that the reverse pushing hydraulic pressure and the molten metal can reach a relatively good balance state through the monitoring of the high temperature resistant packaged intelligent deformation detection strips 104, thereby effectively avoiding the situation that the reverse pushing hydraulic pressure is less than the molten metal pressure and cannot reach a good feeding effect, and the reverse pushing hydraulic pressure is greater than the molten metal pressure, so that the die casting has the possibility of inward sinking at a thicker part, and thus obtaining a good balance effect at two points of the active feeding and the shaping, further improve the die casting yields that the shape is complicated, and thin thick is uneven.
The reverse thrust liquid in step S5 is a liquid sodium chloride solution, and the boiling point of the liquid sodium chloride solution is high, so as to reduce the possibility that the reverse thrust liquid boils during the heating process and the matching of the heating temperature and the temperature of the metal liquid, which affects the reverse thrust of the reverse thrust feeding elastic member 1031.
The reverse-thrust feeding elastic member 1031 has a certain bending strength, so that the moving mold 103 is pre-pressurized by an external adding device, the boiling point of the reverse-thrust liquid is further increased, and the possibility of the reverse-thrust feeding elastic member 1031 being affected by the boiling of the reverse-thrust liquid during the heating process and the matching of the heating temperature and the temperature of the metal liquid is further reduced.
Referring to fig. 6, the injection mechanism of step S3 includes an injection tube 201, an injection nozzle 202, and an injection push rod 203 connected to an external pushing mechanism, the injection tube 201 penetrates through the fixed mold 2 and penetrates through a cavity formed by closing the movable mold base plate 1 and the fixed mold 2, the injection nozzle 202 is fixedly mounted on the upper side of the outer end wall of the injection tube 201 close to the fixed mold 2, a push head portion of the injection push rod 203 is movably sleeved on the inner end wall of the injection tube 201, the molten metal is first injected into the injection tube 201 through the injection nozzle 202, and then the injection push rod 203 is started to push the molten metal to fill the whole cavity in a slow-to-fast manner, so that air in the cavity can be smoothly discharged, the molten metal can completely fill the cavity, the shape of the casting can be ensured to be complete, and the yield of the casting can be further improved.
Filling nozzle 202 is hopper-shaped structure to make in the molten metal can be smoothly and fast pours into filling pipe 201, reduce the molten metal from filling nozzle 202 pour into filling pipe 201 the internal cooling the condition take place the possibility, improve the molten metal fluidity, so that the cavity can be more smoothly filled up to the molten metal.
Referring to fig. 3, locking pins 102 are fixedly mounted at four corners of one end of the movable mold base plate 1 close to the fixed mold 2, locking holes 204 are formed in the position of the fixed mold 2 corresponding to the locking pins 102 in a matching manner, the locking pins 102 can automatically complete butt joint with the corresponding locking holes 204 after the movable mold base plate 1 and the fixed mold 2 are closed, strong hydraulic pressure formed when molten metal is rapidly filled in a cavity is resisted through strong mold locking force formed after the locking pins 102 and the locking holes 204 are in butt joint, and stability of the cavity in the molten metal filling process is guaranteed.
Referring to fig. 2, the lower side of a cavity formed after the movable die base plate 1 and the fixed die 2 are assembled is provided with 3, the detection liquid is filled in the 3, the buoyancy value of the detection liquid is regulated in advance, so that the finished die casting product is in an original descending state in the detection liquid, if the die casting product is not subjected to feeding during die casting, and the internal holes are more, the finished die casting product can float up in the detection liquid, and an operator can quickly judge the feeding effect by observing the ascending and descending state of the die casting product in the detection liquid.
The foregoing is only a preferred embodiment of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.
Claims (10)
1. A die-casting processing method of a metal die casting is characterized in that: the method comprises the following steps:
s1, hole digging and welding: before die assembly, correspondingly digging a hole at the thicker part of a die casting on a movable die (103), and welding a reverse thrust feeding elastic piece (1031) in the hole;
s2, die assembly: the mold closing mechanism is started to close to form a cavity;
s3, micro-excess injection: pushing excessive molten metal at a specified speed through an injection mechanism, enabling the excessive molten metal to flow through a die cavity formed after the die closing mechanism is closed by sufficient energy, and maintaining a certain pressure to transmit the excessive molten metal to the solidifying molten metal;
s4, micro-motion deformation: the metal hydraulic pressure generated by the excessive metal liquid can reversely push the feeding elastic piece (1031) to deform, and the excessive metal liquid is temporarily stored in the deformation space;
s5, reverse thrust feeding: in the molten metal cooling process, pressurizing a reverse thrust liquid stored in a movable die (103) in advance, offsetting the metal liquid pressure, restoring the deformation of a reverse thrust feeding elastic piece (1031) to an initial state, and performing fixed-point feeding on the wall thickness part of the die casting through the allowance of the molten metal at the reverse thrust feeding elastic piece (1031) in the deformation restoring process;
s6, casting pushing: and pushing the die casting subjected to reverse feeding out from the cavity by a core pulling device (101) and collecting.
2. The die-casting processing method of a metal die-casting piece according to claim 1, characterized in that: the mold clamping mechanism in the step S2 comprises a movable mold base plate (1) and a fixed mold (2) which are symmetrically distributed left and right, a core pulling device (101) in the step S6 is fixedly installed in the movable mold base plate (1), a movable mold (103) is fixedly installed at the front end of the movable mold base plate (1), a heating device (106) in the step S5 is fixedly installed at the top end of the movable mold base plate (1), a plurality of through pipes (105) are fixedly installed between the movable mold (103) and the heating device (106), reverse thrust liquid is stored in the heating device (106), the through pipes (105) and the movable mold (103) in advance, the top end of the heating device (106) is fixedly connected with a pressurizing pipe (1061), and the pressurizing pipe (1061) is externally connected with a pressurizing device.
3. A die-casting processing method of a metal die-casting according to claim 1, characterized in that: and in the step S1, a plurality of high-temperature-resistant packaged intelligent deformation detection strips (104) are fixedly mounted on the end wall of one side of the reverse-thrust feeding elastic piece (1031) in the movable die (103).
4. A die-casting processing method of a metal die-casting according to claim 1, characterized in that: the reverse thrust liquid in the step S5 adopts a liquid sodium chloride solution.
5. A die-casting processing method of a metal die-casting according to claim 1, characterized in that: the reverse-thrust feeding elastic member (1031) has a certain bending strength.
6. A die-casting processing method of a metal die-casting according to claim 1, characterized in that: the injection mechanism of the step S3 comprises an injection pipe (201), an injection nozzle (202) and an injection push rod (203) connected with an external propelling mechanism, wherein the injection pipe (201) penetrates through the fixed die (2) and is communicated with a cavity formed after the fixed die base plate (1) and the fixed die (2) are assembled, the injection nozzle (202) is fixedly installed on the upper side of the outer end wall of the injection pipe (201) close to the fixed die (2), and the push head part of the injection push rod (203) is movably sleeved on the inner end wall of the injection pipe (201).
7. The die-casting processing method of a metal die-casting piece according to claim 6, characterized in that: the filling nozzle (202) is of a funnel-shaped structure.
8. A die-casting processing method of a metal die-casting according to claim 1, characterized in that: locking pins (102) are fixedly mounted at four corners of one end, close to the fixed die (2), of the movable die plate (1), and locking holes (204) are formed in the positions, corresponding to the locking pins (102), of the fixed die (2) in a matched mode.
9. A die-casting processing method of a metal die-casting according to claim 1, characterized in that: a plurality of air outlets are uniformly formed in the fixed die (2) close to the upper side of one end of the movable die base plate (1), the air outlets communicate the cavity environment with the external environment, and each air outlet is of a funnel-shaped structure with a narrow inner part and a wide outer part.
10. A die-casting processing method of a metal die-casting according to claim 1, characterized in that: and (3) is arranged on the lower side of a cavity generated after the movable mold base plate (1) and the fixed mold (2) are assembled, and the detection liquid is filled in the cavity (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210758709.2A CN115026257A (en) | 2022-06-29 | 2022-06-29 | Die-casting processing method of metal die casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210758709.2A CN115026257A (en) | 2022-06-29 | 2022-06-29 | Die-casting processing method of metal die casting |
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| Publication Number | Publication Date |
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| CN115026257A true CN115026257A (en) | 2022-09-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210758709.2A Withdrawn CN115026257A (en) | 2022-06-29 | 2022-06-29 | Die-casting processing method of metal die casting |
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| Country | Link |
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| CN (1) | CN115026257A (en) |
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- 2022-06-29 CN CN202210758709.2A patent/CN115026257A/en not_active Withdrawn
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