CN111761034A - Cylinder cover casting process for automobile compressor - Google Patents
Cylinder cover casting process for automobile compressor Download PDFInfo
- Publication number
- CN111761034A CN111761034A CN202010659013.5A CN202010659013A CN111761034A CN 111761034 A CN111761034 A CN 111761034A CN 202010659013 A CN202010659013 A CN 202010659013A CN 111761034 A CN111761034 A CN 111761034A
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- China
- Prior art keywords
- cylinder cover
- mold
- aluminum alloy
- central hole
- workpiece
- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/06—Permanent moulds for shaped castings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/09—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
Abstract
The invention belongs to the technical field of cylinder cover casting of automobile compressors, and particularly discloses a cylinder cover casting process for an automobile compressor, which avoids re-drilling a central hole in machining by changing the use of the existing mold, reduces the operation procedures, saves the machining cost, has small or even no error, improves the productivity and the qualification rate of products, increases the comprehensive economic benefit, simultaneously adopts a process method of organically combining metal mold casting and pressure casting, ensures that the cylinder body and the cylinder cover blank not only keep the characteristic of full exhaust of a metal mold during non-pressure casting, but also have the characteristic of compact pressure casting structure, thereby greatly improving the quality of castings, ensuring that the quality state of any section is the same, improving the machining yield, achieving the non-leakage requirement without dipping treatment, avoiding the pollution of dipping to the environment, and simultaneously reducing the total manufacturing cost of the cylinder body and the cylinder cover by 5 yuan/kg, the cast cylinder cover has good forming rate, the quality of finished products is improved, and the production quality is improved.
Description
Technical Field
The invention belongs to the technical field of casting of cylinder covers of automobile compressors, and particularly relates to a casting process of a cylinder cover for an automobile compressor.
Background
The compressor is a driven fluid machine for raising low-pressure gas into high-pressure gas, and is the heart of a refrigeration system. The compressor is produced in a flow line mode. Manufacturing parts such as a cylinder body, a piston (a rotating shaft), a valve plate, a connecting rod, a crankshaft, an end cover and the like in a machining workshop (including casting); assembling a rotor and a stator in a motor workshop; in the case of a shell or the like manufactured in a press shop, the compressor is considered as the heart of the refrigeration system, and the term which best characterizes the compressor is called "vapor pump". The compressor actually takes on the duty of raising the pressure to raise the suction pressure state to the discharge pressure state.
The existing upper cover blank has no reliable positioning reference in machining, the positioning is inaccurate, the error is large, the waste rate is high, the positioned small hole is not easy to polish, the surface is rough, the use of high pressure in the compressor is not facilitated, the friction force is improved, the energy consumption is increased, a Chinese patent network provides a novel positioning and casting process for the small hole of the cylinder cover of the automobile air-conditioning compressor, the publication number is CN107671500A, the use of the existing die is changed, the phenomenon that a center hole is punched again in machining is avoided, the operation procedures are reduced, the machining cost is saved, the error is small or even error-free, the production rate and the qualification rate of products are improved, and the comprehensive economic benefit is increased. The shell consists of a front cylinder body, a rear cylinder body, a front cylinder cover and a rear cylinder cover. Because the casting method is a thin-wall part, the structure is complex, the requirements on the size, the shape and the surface quality are high, and high-pressure casting is adopted, however, when molten aluminum is injected into a cavity by the casting method, gas in the cavity is not easy to discharge. The molten aluminum tightly attached to the wall surface of the mold is rapidly cooled to form a compact layer (namely the surface layer of the casting), and the thickness of the compact layer is about 0.8 mm generally; the unexhausted gas is crushed and distributed in the casting under high pressure, so that the structure is loose, the integral mechanical strength of the cast compressor cylinder cover is reduced, and the service life is short.
Therefore, a cylinder cover casting process for an automobile compressor is proposed by those skilled in the art to solve the problems set forth in the above background.
Disclosure of Invention
The invention aims to provide a casting process of a cylinder cover for an automobile compressor, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention adopts the following technical scheme: the cylinder cover casting process for the automobile compressor comprises the following steps:
s1, designing the size of a central hole of an upper cylinder cover product suitable for machining operation of a machine through CAD software, inputting the size of the central hole into computer operation, designing the upper cylinder cover to pass through the size rule of the central hole, fixing the original mold in a clamp, determining the position of the central hole of the mold through an infrared sensor, and directly making the central hole on the basis of the existing mold by adopting laser fusion welding to obtain the existing mold;
s2, pouring the aluminum alloy melt in the heat preservation state of 1450-;
s3, when the aluminum alloy molten liquid is poured into the existing mold in the step S2, the aluminum alloy molten liquid is stably poured into a pouring gate, gas in a cavity is discharged outwards through a riser at the upper part of the casting mold, when the aluminum alloy molten liquid after filling is in a semi-solidification state, a pressure of 85-90 Mpa is applied to the aluminum alloy molten liquid in the casting mold from a pouring gate and the riser by a press, and the pressure is maintained until solidification and cooling are carried out, so that a workpiece is obtained;
and S4, polishing and grinding the workpiece in the step S3, electroplating antirust paint on the surface of the workpiece, drying the workpiece in an oven, and cooling the workpiece to room temperature to obtain the product.
Preferably, the quenching is performed at a rate of 16 to 19 deg.C/min in step S2.
Preferably, the thickness of the rust inhibitive paint in step S3 is 0.21-0.29 mm.
Preferably, the roughness of the polishing finish in step S3 is ≦ Ra0.3.
Preferably, the drying temperature in the oven in step S3 is 110-120 ℃.
The invention has the technical effects and advantages that: compared with the prior art:
1. the invention has avoided the center hole of the machine processing again through changing the use of the existing mould, has reduced the operation process, has saved the machine processing cost, the error is little even error-free, raise productivity and qualification rate of the products, increase the comprehensive economic benefits, adopt the metal mold casting and pressure casting organic combined technological method at the same time, make cylinder block, cylinder cap blank have not only kept the metal mould pressureless casting to exhaust the abundant characteristic while pouring, have the characteristic that the pressure casting structure is compact, thus make the quality of casting greatly improve, any cross-section quality state is the same, the finished product rate of processing is improved, do not need to do the dipping treatment can reach the non-leakage requirement, has avoided the pollution of the dipping to the environment, the manufacturing overall cost of cylinder block, cylinder cap can be reduced 5 yuan/kg at the same time;
2. the invention changes the use of the existing die and the combined use of the double casting process, so that the cast cylinder cover has good forming rate, the quality of the finished product is improved, the casting process is simplified, and the production quality is improved.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. The specific embodiments described herein are merely illustrative of the invention and do not delimit the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The invention provides a cylinder cover casting process for an automobile compressor, which comprises the following steps:
s1, designing the size of a central hole of an upper cylinder cover product suitable for machining operation of a machine through CAD software, inputting the size of the central hole into computer operation, designing the upper cylinder cover to pass through the size rule of the central hole, fixing the original mold in a clamp, determining the position of the central hole of the mold through an infrared sensor, and directly making the central hole on the basis of the existing mold by adopting laser fusion welding to obtain the existing mold;
s2, pouring the aluminum alloy melt at 1450 ℃ in a heat preservation state into the existing die with the central hole in the step S1 for quenching and fixing, preserving heat for 22min when the aluminum alloy melt is cooled to 620 ℃, cooling at the speed of 21 ℃/min, demoulding after cooling to 65 ℃, cold rolling and forging, keeping the stress pressure at 300N/cm2, and cooling to room temperature for later use;
s3, when the aluminum alloy melt is poured into the existing mold in the step S2, the aluminum alloy melt is smoothly injected into a pouring gate, gas in a cavity is discharged outwards through a riser at the upper part of the mold, when the aluminum alloy melt after mold filling is in a semi-solidification state, a pressure of 85MPa is applied to the aluminum alloy melt in the mold from the sprue and the riser by a press, and the pressure is maintained until solidification and cooling are carried out, so that a workpiece is obtained;
and S4, polishing and grinding the workpiece in the step S3, electroplating antirust paint on the surface of the workpiece, drying the workpiece in an oven, and cooling the workpiece to room temperature to obtain the product.
Specifically, in step S2, the quenching is performed at a rate of 16 ℃/min.
Specifically, the thickness of the rust inhibitive paint in step S3 was 0.21 mm.
Specifically, the roughness of the polishing pad is < ra0.3 in step S3.
Specifically, the oven drying temperature in step S3 is 110 ℃.
Example 2
The invention provides a cylinder cover casting process for an automobile compressor, which comprises the following steps:
s1, designing the size of a central hole of an upper cylinder cover product suitable for machining operation of a machine through CAD software, inputting the size of the central hole into computer operation, designing the upper cylinder cover to pass through the size rule of the central hole, fixing the original mold in a clamp, determining the position of the central hole of the mold through an infrared sensor, and directly making the central hole on the basis of the existing mold by adopting laser fusion welding to obtain the existing mold;
s2, pouring the aluminum alloy melt at the temperature of 1480 ℃ into the existing die with the central hole in the step S1 for quenching and fixing, preserving heat for 23min when the aluminum alloy melt is cooled to 630 ℃, cooling at the speed of 22 ℃/min, preserving heat for 11min when the aluminum alloy melt is cooled to 66 ℃, demoulding, cold rolling and forging, wherein the stress pressure is 310N/cm2, and cooling to the room temperature for later use;
s3, when the aluminum alloy melt is poured into the existing mold in the step S2, the aluminum alloy melt is smoothly injected into a pouring gate, gas in a cavity is discharged outwards through a riser at the upper part of the mold, when the aluminum alloy melt after mold filling is in a semi-solidification state, a pressure of 86Mpa is applied to the aluminum alloy melt in the mold from a pouring gate and the riser by using a press, and the pressure is maintained until solidification and cooling are carried out, so that a workpiece is obtained;
and S4, polishing and grinding the workpiece in the step S3, electroplating antirust paint on the surface of the workpiece, drying the workpiece in an oven, and cooling the workpiece to room temperature to obtain the product.
Specifically, in step S2, the quenching was performed at a rate of 17 ℃/min.
Specifically, the thickness of the rust inhibitive paint in step S3 was 0.23 mm.
Specifically, the roughness of the polishing in step S3 is not more than ra0.3.
Specifically, the oven drying temperature in step S3 was 115 ℃.
Example 3
The invention provides a cylinder cover casting process for an automobile compressor, which comprises the following steps:
s1, designing the size of a central hole of an upper cylinder cover product suitable for machining operation of a machine through CAD software, inputting the size of the central hole into computer operation, designing the upper cylinder cover to pass through the size rule of the central hole, fixing the original mold in a clamp, determining the position of the central hole of the mold through an infrared sensor, and directly making the central hole on the basis of the existing mold by adopting laser fusion welding to obtain the existing mold;
s2, pouring the aluminum alloy melt at 1470 ℃ under the heat preservation state into the existing die with the central hole in the step S1 for quenching and fixing, preserving heat for 25min when the aluminum alloy melt is cooled to 650 ℃, cooling at the speed of 23 ℃/min, preserving heat for 14min when the aluminum alloy melt is cooled to 68 ℃, demoulding, cold rolling and forging, wherein the stress pressure is 340N/cm2, and cooling to the room temperature for later use;
s3, when the aluminum alloy melt is poured into the existing mold in the step S2, the aluminum alloy melt is smoothly injected into a pouring gate, gas in a cavity is discharged outwards through a riser at the upper part of the mold, when the aluminum alloy melt after mold filling is in a semi-solidification state, a pressure of 87Mpa is applied to the aluminum alloy melt in the mold from a pouring gate and the riser by using a press, and the pressure is maintained until solidification and cooling are carried out, so that a workpiece is obtained;
and S4, polishing and grinding the workpiece in the step S3, electroplating antirust paint on the surface of the workpiece, drying the workpiece in an oven, and cooling the workpiece to room temperature to obtain the product.
Specifically, in step S2, the quenching is performed at a rate of 18 ℃/min.
Specifically, the thickness of the rust inhibitive paint in step S3 was 0.26 mm.
Specifically, the roughness of the polishing pad in step S3 is ra0.3.
Specifically, the oven drying temperature in step S3 is 116 ℃.
Example 4
The invention provides a cylinder cover casting process for an automobile compressor, which comprises the following steps:
s1, designing the size of a central hole of an upper cylinder cover product suitable for machining operation of a machine through CAD software, inputting the size of the central hole into computer operation, designing the upper cylinder cover to pass through the size rule of the central hole, fixing the original mold in a clamp, determining the position of the central hole of the mold through an infrared sensor, and directly making the central hole on the basis of the existing mold by adopting laser fusion welding to obtain the existing mold;
s2, pouring the aluminum alloy melt in the heat preservation state at 1500 ℃ into the existing die with the central hole in the step S1 for quenching and fixing, preserving heat for 27min when the aluminum alloy melt is cooled to 670 ℃, cooling at the speed of 23 ℃/min, demoulding after the aluminum alloy melt is cooled to 69 ℃, cold rolling and forging are carried out, the stress pressure is 345N/cm2, and the aluminum alloy melt is cooled to the room temperature for standby;
s3, when the aluminum alloy melt is poured into the existing mold in the step S2, the aluminum alloy melt is smoothly injected into a pouring gate, gas in a cavity is discharged outwards through a riser at the upper part of the mold, when the aluminum alloy melt after mold filling is in a semi-solidification state, a pressure of 89Mpa is applied to the aluminum alloy melt in the mold from the sprue and the riser by a press, and the pressure is maintained until solidification and cooling are carried out, so that a workpiece is obtained;
and S4, polishing and grinding the workpiece in the step S3, electroplating antirust paint on the surface of the workpiece, drying the workpiece in an oven, and cooling the workpiece to room temperature to obtain the product.
Specifically, in step S2, the quenching is performed at a rate of 18 ℃/min.
Specifically, the thickness of the rust inhibitive paint in step S3 was 0.28 mm.
Specifically, the roughness of the polishing in step S3 is not more than ra0.3.
Specifically, the oven drying temperature in step S3 was 118 ℃.
Example 5
The invention provides a cylinder cover casting process for an automobile compressor, which comprises the following steps:
s1, designing the size of a central hole of an upper cylinder cover product suitable for machining operation of a machine through CAD software, inputting the size of the central hole into computer operation, designing the upper cylinder cover to pass through the size rule of the central hole, fixing the original mold in a clamp, determining the position of the central hole of the mold through an infrared sensor, and directly making the central hole on the basis of the existing mold by adopting laser fusion welding to obtain the existing mold;
s2, pouring the aluminum alloy melt in the state of 1550 ℃ heat preservation into the existing die with the central hole in the step S1 for quenching and fixing, preserving heat for 28min when the aluminum alloy melt is cooled to 680 ℃, cooling at the speed of 24 ℃/min, preserving heat for 15min when the aluminum alloy melt is cooled to 70 ℃, demoulding, cold rolling and forging, keeping the stress pressure at 350N/cm2, and cooling to the room temperature for later use;
s3, when the aluminum alloy melt is poured into the existing mold in the step S2, the aluminum alloy melt is smoothly injected into a pouring gate, gas in a cavity is discharged outwards through a riser at the upper part of the mold, when the aluminum alloy melt after mold filling is in a semi-solidification state, a pressure of 90Mpa is applied to the aluminum alloy melt in the mold from the sprue and the riser by a press, and the pressure is maintained until solidification and cooling are carried out, so that a workpiece is obtained;
and S4, polishing and grinding the workpiece in the step S3, electroplating antirust paint on the surface of the workpiece, drying the workpiece in an oven, and cooling the workpiece to room temperature to obtain the product.
Specifically, in step S2, the quenching was performed at a rate of 19 ℃/min.
Specifically, the thickness of the rust inhibitive paint in step S3 was 0.29 mm.
Specifically, the roughness of the polishing in step S3 is not more than ra0.3.
Specifically, the oven drying temperature in step S3 is 120 ℃.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (5)
1. The cylinder cover casting process for the automobile compressor is characterized by comprising the following steps of: the method comprises the following steps:
s1, designing the size of a central hole of an upper cylinder cover product suitable for machining operation of a machine through CAD software, inputting the size of the central hole into computer operation, designing the upper cylinder cover to pass through the size rule of the central hole, fixing the original mold in a clamp, determining the position of the central hole of the mold through an infrared sensor, and directly making the central hole on the basis of the existing mold by adopting laser fusion welding to obtain the existing mold;
s2, pouring the aluminum alloy melt in the heat preservation state of 1450-;
s3, when the aluminum alloy molten liquid is poured into the existing mold in the step S2, the aluminum alloy molten liquid is stably poured into a pouring gate, gas in a cavity is discharged outwards through a riser at the upper part of the casting mold, when the aluminum alloy molten liquid after filling is in a semi-solidification state, a pressure of 85-90 Mpa is applied to the aluminum alloy molten liquid in the casting mold from a pouring gate and the riser by a press, and the pressure is maintained until solidification and cooling are carried out, so that a workpiece is obtained;
and S4, polishing and grinding the workpiece in the step S3, electroplating antirust paint on the surface of the workpiece, drying the workpiece in an oven, and cooling the workpiece to room temperature to obtain the product.
2. The casting process of the cylinder cover for the automobile compressor, according to claim 1, is characterized in that: quenching is performed at a rate of 16-19 deg.C/min in step S2.
3. The casting process of the cylinder cover for the automobile compressor, according to claim 1, is characterized in that: the thickness of the rust inhibitive paint in step S3 was 0.21-0.29 mm.
4. The casting process of the cylinder cover for the automobile compressor, according to claim 1, is characterized in that: the roughness of the polishing and the grinding in the step S3 is less than or equal to Ra0.3.
5. The casting process of the cylinder cover for the automobile compressor, according to claim 1, is characterized in that: the drying temperature in the oven is 110-120 ℃ in step S3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010659013.5A CN111761034A (en) | 2020-07-09 | 2020-07-09 | Cylinder cover casting process for automobile compressor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010659013.5A CN111761034A (en) | 2020-07-09 | 2020-07-09 | Cylinder cover casting process for automobile compressor |
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| CN111761034A true CN111761034A (en) | 2020-10-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010659013.5A Pending CN111761034A (en) | 2020-07-09 | 2020-07-09 | Cylinder cover casting process for automobile compressor |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61144216A (en) * | 1984-12-18 | 1986-07-01 | Toyama Keikinzoku Kogyo Kk | Manufacture of die for hot extrusion press of aluminum and aluminum alloy |
| GB2236556A (en) * | 1989-10-02 | 1991-04-10 | Honda Motor Co Ltd | I.c. engine cylinder head and die set for fabricating the head |
| CN202984580U (en) * | 2012-12-19 | 2013-06-12 | 上海爱仕达汽车零部件有限公司 | Cylinder cover casting die |
| CN103691886A (en) * | 2013-12-24 | 2014-04-02 | 上海爱仕达汽车零部件有限公司 | Metal mould casting method of cylinder cover |
| CN107671500A (en) * | 2017-09-27 | 2018-02-09 | 安徽海立精密铸造有限公司 | A kind of automobile air conditioner compressor cylinder cap aperture positions New Casting Technique |
-
2020
- 2020-07-09 CN CN202010659013.5A patent/CN111761034A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61144216A (en) * | 1984-12-18 | 1986-07-01 | Toyama Keikinzoku Kogyo Kk | Manufacture of die for hot extrusion press of aluminum and aluminum alloy |
| GB2236556A (en) * | 1989-10-02 | 1991-04-10 | Honda Motor Co Ltd | I.c. engine cylinder head and die set for fabricating the head |
| CN202984580U (en) * | 2012-12-19 | 2013-06-12 | 上海爱仕达汽车零部件有限公司 | Cylinder cover casting die |
| CN103691886A (en) * | 2013-12-24 | 2014-04-02 | 上海爱仕达汽车零部件有限公司 | Metal mould casting method of cylinder cover |
| CN107671500A (en) * | 2017-09-27 | 2018-02-09 | 安徽海立精密铸造有限公司 | A kind of automobile air conditioner compressor cylinder cap aperture positions New Casting Technique |
Non-Patent Citations (1)
| Title |
|---|
| 董光明等: "《金工实习》", 31 December 2011, 徐州：中国矿业大学出版社 * |
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Application publication date: 20201013 |