CN211990883U - Low-pressure casting die for rear auxiliary cavity of hydraulic coupler - Google Patents
Low-pressure casting die for rear auxiliary cavity of hydraulic coupler Download PDFInfo
- Publication number
- CN211990883U CN211990883U CN202020218923.5U CN202020218923U CN211990883U CN 211990883 U CN211990883 U CN 211990883U CN 202020218923 U CN202020218923 U CN 202020218923U CN 211990883 U CN211990883 U CN 211990883U
- Authority
- CN
- China
- Prior art keywords
- die
- casting
- ejector rod
- low
- pressure casting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model discloses a hydraulic coupler rear auxiliary cavity low-pressure casting die which is made of alloy steel and comprises a lower die, an upper die, a core, a guide pillar, an inner ejector rod, an outer ejector rod, a die carrier and a positioning pin; the lower die and the upper die form a cavity of a casting, an inner sprue is arranged at the center of the lower die, and the core is arranged at the center of the upper die and forms an inner pouring gate opposite to the inner sprue; the positioning pin is used for guiding and accurately positioning during die assembly; the inner ejector rod and the outer ejector rod of the guide post are used for guiding and ejecting castings during demolding. The utility model discloses a casting mould can make the aluminum alloy realize filling the chamber, solidifying, die opening and shutting and ejecting foundry goods at low pressure (atmospheric pressure 0.02 ~ 0.05MPa) condition, has the advantage that material utilization is high, the foundry goods is fine and close and the yield is high, reduces solid waste's production, can be used to the production of the casting aluminum alloy foundry goods of the same type.
Description
Technical Field
The utility model relates to a mould structure, concretely relates to assist chamber low pressure casting mould behind hydraulic coupling.
Background
The rear auxiliary cavity of the hydraulic coupler is a liquid filling part of the torque-limiting type hydraulic coupler, and the liquid filling amount of the working cavity is balanced under the action of containing working liquid during the static, starting, working and overload of the torque-limiting type hydraulic coupler, so that the aim of controlling various parameters of starting and overload is fulfilled.
As shown in figure 1, the rear auxiliary cavity of the hydraulic coupler is integrally in a U-shaped cylindrical structure, a flange is arranged on the outer portion of the rear auxiliary cavity, a circular ring is arranged in the rear auxiliary cavity, and cylindrical bosses are uniformly distributed at the bottom of the U-shaped cavity. The ratio of the inner diameter to the outer diameter of the U shape is about 1: 3, the height-diameter ratio is 1: 3-4, the maximum wall thickness ratio is 2.5, and the maximum wall thickness ratio is located at the boss. The casting material is aluminum-silicon casting alloy with the alloy grade ZL 104. During sand casting, leakage and seepage are easy to occur at the positions of the bosses after screw holes are drilled and tapped and the inner wall of the inner circular ring to form waste products, and the general qualification rate is between 70% and 85%. Meanwhile, sand casting can generate a large amount of waste sand and dead heads, thereby causing environmental pollution and low material utilization rate.
The low pressure casting technology for aluminium alloy is a special casting technology. The casting is subjected to mold filling, solidification and cooling at a lower pressure, and the continuous mechanical and intelligent production can be realized by the casting method for producing the aluminum casting through the processes of mold closing, low-pressure mold filling, pressurized solidification, cooling, pressure relief, mold opening, casting ejection, cleaning and the like.
Disclosure of Invention
The utility model aims at providing an assist chamber low pressure casting mould behind fluid coupling to assist chamber part quality, qualification rate, improvement material utilization behind the improvement fluid coupling, reduce the emission of other solid waste such as sand waste, improve production efficiency and improve production working condition.
In order to achieve the above purpose, the technical scheme of the utility model is that:
a low-pressure casting die for a rear auxiliary cavity of a hydraulic coupler is made of alloy steel and comprises a lower die, an upper die, a core, a guide pillar, an inner ejector rod, an outer ejector rod, a die frame and a positioning pin; the lower die and the upper die form a cavity of a casting, an inner sprue is arranged at the center of the lower die, and the core is arranged at the center of the upper die and forms an inner pouring gate opposite to the inner sprue; the positioning pin is used for guiding and accurately positioning during die assembly; the inner ejector rod and the outer ejector rod of the guide post are used for guiding and ejecting castings during demolding.
As an improvement of the utility model, the mold core in the middle of be hemispherical structure, be favorable to dividing liquid and reducing interior runner aluminium liquid thickness.
As an improvement of the utility model, the plane that goes up mould and lower mould combination set up radial evenly distributed's air discharge duct, exhaust when being favorable to filling the type.
Furthermore, the width of the exhaust groove is 15mm, and the depth of the exhaust groove is 0.1 mm.
As an improvement of the utility model, interior ejector pin, outer ejector pin and last mould be clearance fit, and the pinhole of interior ejector pin and outer ejector pin is located the last top surface of foundry goods, exhausts when being favorable to filling the type.
Furthermore, the roughness of the matching surface of the die is Ra1.6 grade, and the roughness of the surface of the die cavity, the surface of the inner sprue and the surface of the inner pouring channel is Ra0.8 grade.
Further, the draft angle of the inner sprue is 5 degrees; the draft angle of the outer surface of the upper die (3) is 2 degrees, and the draft angle of the inner surface is 3-5 degrees; the draft angle of the outer surface of the lower die (1) is 1.5 degrees, and the draft angle of the inner surface of the lower die is 5-7 degrees.
The utility model discloses compare with sand casting mould, its beneficial effect lies in:
(1) the low-pressure casting technology and the metal mold technology are combined, so that the aluminum liquid can be solidified, fed and cooled at low pressure and high pressure; after pressure relief, aluminum liquid in the riser tube flows back to the crucible; and when the die is opened, the casting, the ingate and the aluminum alloy solidified by the ingate can be separated from the lower die together, and the casting is ejected out of the metal die by an ejection mechanism after being cooled by air, so that the high-precision and compact aluminum alloy casting is obtained.
(2) The continuous production of the castings can be realized, the production efficiency is high, 6-10 auxiliary cavity castings can be produced in each hour, the comprehensive utilization rate of materials is high, the weight of the castings accounts for more than 90% of the weight of the blank, the weight of the castings is reduced by more than 10% compared with that of sand castings, and the materials are saved by 12-15%.
(3) The casting has the advantages of less machining allowance, uniform shape, surface roughness reaching Ra6.3 grade, compact and uniform internal structure reaching more than 1 grade of pinhole degree, high size precision reaching CT 4-CT 6 grade, high part air tightness inspection qualification rate of more than 98 percent after machining, effectively improved casting quality and qualification rate, and high economic benefit.
(4) The low-pressure casting die can realize mechanical automatic continuous production, reduce the labor intensity of workers, improve the production operation environment, greatly reduce the generation of solid wastes and easily realize clean green intelligent production.
(5) The method is suitable for the rear auxiliary cavity of the hydraulic coupler, and is also suitable for the production of middle and small-batch cast aluminum alloy parts of other U-shaped cylindrical parts and the production of parts with higher air tightness requirements.
Drawings
FIG. 1 is a schematic diagram of the construction of the rear auxiliary chamber of a fluid coupling;
FIG. 2 is a schematic structural view of a rear auxiliary cavity low-pressure casting die of the fluid coupling according to the embodiment;
FIG. 3 is a schematic view showing the production of a rear auxiliary cavity low-pressure casting die of the fluid coupling of the present embodiment;
description of reference numerals: 1-lower mould; 2-guide pillar; 3, molding the die; 4-inner mandril; 5-a mold core; 6-outer mandril; 7-a mould frame; 8-a positioning pin; 9-casting; 10-a crucible; 11-a riser tube; 12-aluminum liquid; 13-Low pressure casting machine.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
Referring to fig. 2 and 3, the rear auxiliary cavity low-pressure casting die for the fluid coupling provided by the embodiment mainly comprises a lower die 1, an upper die 3, a core 5, a guide pillar 2, an inner ejector rod 4, an outer ejector rod 6, a die carrier 7 and a positioning pin 8, and all die parts are made of high-quality alloy steel, so that the rear auxiliary cavity low-pressure casting die has the characteristics of long service life and low loss.
The cavities formed by the lower die 1, the upper die 3 and the core 5 are a pouring gate, a pouring channel and a cavity of a casting. The lower die 1 is connected with a die carrier of a low-pressure casting machine 13, an inner sprue is positioned at the center of the lower die 1, and liquid is fed through a liquid lifting pipe 11 to form the lower surface of a casting. The mold core 5 is installed in the center of the upper mold 3 through a bolt, the mold core and the upper mold are connected with the mold frame 7 through the guide pillar 2, and the mold core 5 and the inner pouring gate are opposite to form an inner pouring gate which is used for guiding aluminum liquid to a cavity of a casting to form the upper surface of the casting. The bottom surfaces of the inner ejector rods 4 and the outer ejector rods 6 are positioned at the inner and outer topmost planes of the casting cavity of the upper die 3 and are uniformly distributed in a circumferential manner, and the number of the inner ejector rods is 4, and the number of the outer ejector rods is 12. The die carrier 7 is connected with an ejection mechanism of the low-pressure casting machine 13, so that the upper die 3, the guide post 2, the inner ejector rod 4 and the outer ejector rod 6 are connected with the low-pressure casting machine 13 into a whole. And the positioning pins 8 are uniformly distributed on the periphery of the casting cavity of the lower die 1 and used for guiding and accurately positioning during die assembly. The guide post 2, the inner ejector pin 4 and the outer ejector pin 6 are used for guiding in demolding and ejecting the casting.
The middle of the mold core 5 is of a hemispherical structure, which is beneficial to liquid separation and reduction of the thickness of the molten aluminum at the inner sprue. The plane of the upper die 3 combined with the lower die 1 is provided with exhaust grooves which are radially and uniformly distributed and have the width of 15mm and the depth of 0.1 mm. The upper die 3 is in clearance fit with the inner ejector rod 4 and the outer ejector rod 6, and is favorable for exhausting gas during mold filling. The casting boss forming part of the upper die 3 is provided with a rib plate which is connected with the U-shaped bottom surface and the inner side surface of the inner ring, and the rib plate can ensure that the boss is smoothly filled and the influence of a thermal node at the part on solidification is ensured, so that the inner surface layer at the part is compact in structure. The roughness of the mating surface of the mold is Ra1.6 grade, and the roughness of the surface of the cavity, the surface of the ingate and the surface of the ingate are Ra0.8 grade. The draft inclination of the inner surface and the draft inclination of the inner surface of the inner sprue, the upper die and the lower die and the inner surface and the draft inclination of the outer surface of the cavity are all different: an inner sprue is 5 degrees, and the outer surface of the upper die is 2 degrees; the inner surface of the upper die is 3-5 degrees; the outer surface of the lower die is 1 degree and 30'; the inner surface of the upper die is 5-7 degrees. Such mold features facilitate demolding and densifying the casting structure.
The application of the low-pressure casting die with the auxiliary cavity behind the hydraulic coupler is simple in structure and has the advantages of guiding, vertically opening and closing the die, vertically ejecting a casting and naturally cooling. The casting mold is arranged on a low-pressure casting machine, the cavity, the ingate and the ingate are sprayed with paint, and then the mold is heated to 350-400 ℃, so that casting production can be carried out. The basic principle of low-pressure casting is as follows:
as shown in fig. 3, dry compressed air is introduced into a crucible 10 (to be sealed) containing aluminum alloy liquid, and acts on the aluminum alloy liquid level which is kept at a certain pouring temperature, so that a pressure difference exists between the crucible 10 and a mold cavity, the aluminum alloy liquid rises along a riser pipe 11 from bottom to top under the action of lower mold filling pressure, and is stably filled into the mold cavity through an inner pouring gate and an inner pouring gate, gas in the mold cavity is discharged out of the cavity from an exhaust groove and an exhaust hole until the aluminum alloy liquid fills the mold cavity, and the compressed air pressure is gradually increased after the aluminum alloy liquid fills the mold cavity, so that the aluminum alloy liquid in the mold cavity is crystallized and solidified under the action of higher pressure; then, the pressure in the crucible 10 is released, and the aluminum alloy liquid which has not yet solidified in the riser tube 11 is allowed to fall back into the crucible 10 by its own weight. And when the casting is cooled to a certain temperature, opening the mold to enable the casting 9 and the upper mold 3 to be separated from the lower mold 1, lifting the casting to a certain height, extending into a casting bracket, ejecting the casting, moving the bracket and the casting out, cleaning the mold, and closing the mold. Therefore, the production flow from the cavity filling to the production of the casting is completed, and the continuous production of the casting is realized.
The installation and use of the rear auxiliary cavity low-pressure casting die of the fluid coupling provided in the embodiment are described in detail below:
die mounting
(1) The low pressure casting machine 13 is checked to ensure normal operational control of electrical systems, controls, gas circuits, hydraulic systems, heating and heat preservation, seals, mechanical mechanisms, and the like.
(2) And integrally hoisting the die to a lower die plate of a low-pressure casting machine 13, moving the die to enable the ingate to be opposite to the riser tube 11, and screwing down the connecting bolt of the lower die 1 and the lower die plate.
(2) And moving an upper template of the low-pressure casting machine 13 to enable the upper template to be tightly attached to the die carrier 7, then properly pressurizing to enable the die to be attached, and screwing down connecting bolts of the die carrier 7 and the upper template.
(3) And (3) loosening the connecting plate fixed on the upper die and the lower die, adjusting the lifting distance of the upper die plate, continuously lifting for several times, and observing the good activity conditions of die assembly, die opening, guide pillar activity, mandril stretching, casting bracket and the like.
(4) And (5) checking the activity condition of the die according to the casting process. And the requirements of working parameters are met.
Preparation before casting
(1) Molten aluminum which is subjected to smelting modification treatment and degassing and meets the requirements is filled into a crucible 10 of a low-pressure casting machine, and a liquid filling cover is sealed.
(2) And opening the mold, and spraying demolding paint on the surfaces of the mold cavity, the inner sprue and the inner runner uniformly.
(3) And heating the mold to ensure that the surface temperature of each part of the mold cavity, the ingate and the like reaches 350-400 ℃.
(4) The inspection of opening and closing the mould is carried out flexibly and smoothly, and the binding surfaces of the upper mould and the lower mould are tight.
(5) And (4) trial casting in a manual mode, and checking the state of the casting and the temperature of the mold until the fully-filled casting is cast.
Production of castings
(1) And (3) producing 2-3 castings according to the sequence of manual low-pressure mold filling, pressurized solidification cooling, pressure relief cooling, mold opening, natural cooling, bracket moving, casting ejection, cleaning, mold closing and the like of the automatic pouring process parameters.
(2) The castings are produced in an automatic mode, taking care of the casting production conditions and the mold surface conditions.
(3) Supplementing the aluminum liquid in time according to the modification time of the aluminum liquid.
(4) And various records are made in time in the production process, and production batch number records are printed on the inner surface of the casting.
(5) And (3) closing the mold when the production is about to end, and cleaning out the residual aluminum liquid on the low-pressure casting machine.
(6) And (5) loosening the connecting bolt of the die and the low-pressure casting machine in time.
Aluminum liquid temperature in the production process of aluminum castings:
(1) the aluminum casting of the aluminum-silicon alloy has the aluminum liquid temperature of generally 700-730 ℃.
(2) The temperature of the aluminum liquid is controlled within the range of 700 ℃ and 730 ℃. The temperature is selected according to the difference of the casting mold heat dissipation speed, the casting structure difficulty and the casting thickness, the temperature is selected to be suitable, the casting mold heat dissipation speed is low, the structure is simple, the casting thickness is thick, the lower limit is taken for the molten aluminum temperature, the casting mold heat dissipation speed is high, the casting wall is thin, the structure is complex, and the middle and upper limit temperature is taken.
The above detailed description is specific to possible embodiments of the present invention, and the embodiments are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the scope of the present invention should be included within the scope of the present invention.
Claims (7)
1. The utility model provides a low pressure casting mould of fluid coupling back auxiliary chamber, adopts alloy steel to make its characterized in that: comprises a lower die (1), an upper die (3), a mold core (5), a guide post (2), an inner ejector rod (4), an outer ejector rod (6), a mold frame (7) and a positioning pin (8); the lower die (1) and the upper die (3) form a die cavity of a casting, an inner sprue is arranged at the center of the lower die (1), and the die core (5) is arranged at the center of the upper die (3) and forms an inner pouring gate opposite to the inner sprue; the positioning pin (8) is used for guiding and accurately positioning during die assembly; the guide post (2) is used for guiding and ejecting a casting when an inner ejector rod (4) and an outer ejector rod (6) are demolded.
2. The low-pressure casting die for the rear auxiliary cavity of the fluid coupling as claimed in claim 1, wherein: the middle of the mold core (5) is of a hemispherical structure.
3. The low-pressure casting die for the rear auxiliary cavity of the fluid coupling as claimed in claim 1, wherein: the plane where the upper die (3) and the lower die (1) are combined is provided with exhaust grooves which are uniformly distributed in the radial direction.
4. A fluid coupling rear auxiliary cavity low-pressure casting die according to claim 3, wherein: the width of the exhaust groove is 15mm, and the depth of the exhaust groove is 0.1 mm.
5. A fluid coupling rear auxiliary cavity low-pressure casting die according to any one of claims 1 to 4, wherein: the inner ejector rod (4), the outer ejector rod (6) and the upper die (3) are in clearance fit, and pin holes of the inner ejector rod (4) and the outer ejector rod (6) are located on the upper top surface of the casting.
6. The hydraulic coupling rear auxiliary cavity low-pressure casting die as claimed in claim 5, wherein: the roughness of the matching surface of the die is Ra1.6 grade, and the roughness of the surface of the die cavity, the surface of the inner sprue and the surface of the inner pouring gate is Ra0.8 grade.
7. The hydraulic coupling rear auxiliary cavity low-pressure casting die as claimed in claim 5, wherein: the pattern drawing inclination of the inner sprue is 5 degrees; the draft angle of the outer surface of the upper die (3) is 2 degrees, and the draft angle of the inner surface is 3-5 degrees; the draft angle of the outer surface of the lower die (1) is 1.5 degrees, and the draft angle of the inner surface of the lower die is 5-7 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020218923.5U CN211990883U (en) | 2020-02-27 | 2020-02-27 | Low-pressure casting die for rear auxiliary cavity of hydraulic coupler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020218923.5U CN211990883U (en) | 2020-02-27 | 2020-02-27 | Low-pressure casting die for rear auxiliary cavity of hydraulic coupler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211990883U true CN211990883U (en) | 2020-11-24 |
Family
ID=73423962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020218923.5U Active CN211990883U (en) | 2020-02-27 | 2020-02-27 | Low-pressure casting die for rear auxiliary cavity of hydraulic coupler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211990883U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114713798A (en) * | 2022-06-09 | 2022-07-08 | 中国航发北京航空材料研究院 | Vacuum mold-filling top-placing chilling pressurized solidification device and method for preparing large aluminum alloy casting |
| CN114888264A (en) * | 2022-05-10 | 2022-08-12 | 保定恒生液力偶合器制造有限公司 | Casting equipment for manufacturing coupler and production process |
-
2020
- 2020-02-27 CN CN202020218923.5U patent/CN211990883U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114888264A (en) * | 2022-05-10 | 2022-08-12 | 保定恒生液力偶合器制造有限公司 | Casting equipment for manufacturing coupler and production process |
| CN114713798A (en) * | 2022-06-09 | 2022-07-08 | 中国航发北京航空材料研究院 | Vacuum mold-filling top-placing chilling pressurized solidification device and method for preparing large aluminum alloy casting |
| CN114713798B (en) * | 2022-06-09 | 2022-08-30 | 中国航发北京航空材料研究院 | Vacuum mold-filling top-placing chilling pressurized solidification device and method for preparing large aluminum alloy casting |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102941333B (en) | V method, low pressure produce the method for voltage-bearing aluminum alloy tank body of ultra-high voltage switch | |
| CN101269414B (en) | Casting method for large-scale overpressure resistant aluminum housing | |
| CN108543914B (en) | High-pressure hub casting mold and casting method thereof | |
| CN211990883U (en) | Low-pressure casting die for rear auxiliary cavity of hydraulic coupler | |
| CN105880486A (en) | Die and method for casting wheel hub | |
| CN204700275U (en) | Building hoist box body of speed reducer low pressure casting die | |
| CN102211166A (en) | Molding process for casting aluminum casting by using sand mold under low pressure | |
| CN114054721A (en) | Mold casting device | |
| CN112387931A (en) | Gravity casting mold of new energy water-cooled motor shell end cover and casting process thereof | |
| CN106623856B (en) | A kind of method and apparatus improving extrusion casint Piston Casting quality | |
| CN202343915U (en) | Cast die for aluminum alloy current transformer (CT) shell for high-voltage switch | |
| CN1323783C (en) | Magnesium alloy hub pressure casting apparatus and method thereof | |
| CN202934103U (en) | Casting mould of pressure-resistant cast aluminum cover plate used for high-voltage switch | |
| CN212191148U (en) | Thin-wall shell mould casting sand box | |
| CN115608957A (en) | Magnesium alloy antigravity casting equipment and pouring flame-retardant method thereof | |
| CN204449267U (en) | Supercharger impeller " a pipe multimode " vacuum adjustable pressure casting special purpose device | |
| CN203030867U (en) | Large-scale plate mould used for ultrahigh pressure switch | |
| CN215144607U (en) | Negative pressure die-casting device for heat-resistant steel exhaust manifold | |
| CN206732095U (en) | Die casting and die casting equipment | |
| CN110814295A (en) | Mold core with ultrasonic vibration device | |
| CN215144442U (en) | Engine cylinder lid casting mold | |
| CN219151507U (en) | Casting die for steel feeding plate | |
| CN219598031U (en) | Horizontal round bar casting machine | |
| CN211614279U (en) | Compound low pressure cast aluminium equipment | |
| CN212469656U (en) | Embedded iron mold device for sand-lined iron mold casting production |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |