CN114109807B - Compressor piston and preparation method and application thereof - Google Patents
Compressor piston and preparation method and application thereof Download PDFInfo
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- CN114109807B CN114109807B CN202111440470.6A CN202111440470A CN114109807B CN 114109807 B CN114109807 B CN 114109807B CN 202111440470 A CN202111440470 A CN 202111440470A CN 114109807 B CN114109807 B CN 114109807B
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- 238000002360 preparation method Methods 0.000 title abstract description 23
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 43
- 238000003466 welding Methods 0.000 claims abstract description 26
- 238000004519 manufacturing process Methods 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 14
- 238000003756 stirring Methods 0.000 claims abstract description 11
- 239000011265 semifinished product Substances 0.000 claims description 43
- 238000005520 cutting process Methods 0.000 claims description 22
- 230000003647 oxidation Effects 0.000 claims description 15
- 238000007254 oxidation reaction Methods 0.000 claims description 15
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 11
- 229910052782 aluminium Inorganic materials 0.000 claims description 11
- 238000010273 cold forging Methods 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 10
- 239000000956 alloy Substances 0.000 abstract description 8
- 230000009286 beneficial effect Effects 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 6
- 229910045601 alloy Inorganic materials 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000009776 industrial production Methods 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 description 14
- 238000009740 moulding (composite fabrication) Methods 0.000 description 13
- 239000010949 copper Substances 0.000 description 11
- 238000003754 machining Methods 0.000 description 9
- 229910052710 silicon Inorganic materials 0.000 description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 8
- 238000004321 preservation Methods 0.000 description 8
- 229910052802 copper Inorganic materials 0.000 description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 239000010703 silicon Substances 0.000 description 6
- 238000005242 forging Methods 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- WCCJDBZJUYKDBF-UHFFFAOYSA-N copper silicon Chemical compound [Si].[Cu] WCCJDBZJUYKDBF-UHFFFAOYSA-N 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000010791 quenching Methods 0.000 description 4
- 230000000171 quenching effect Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000005496 eutectics Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000004381 surface treatment Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/10—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass pistons
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/06—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used
- C25D11/08—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used containing inorganic acids
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
The invention provides a compressor piston, a preparation method and application thereof, wherein the compressor piston comprises a piston seat and a piston cylinder, and the material of the piston seat comprises a first aluminum alloy; the piston cylinder is made of a second aluminum alloy; according to the invention, different materials are selected according to the different application characteristics of the two parts, so that the production cost is reduced; the preparation method adopts a friction stir welding technology to weld dissimilar alloys, simplifies the process flow, ensures the welding quality, greatly improves the production efficiency and is beneficial to industrial production.
Description
Technical Field
The invention belongs to the technical field of compressors, and particularly relates to a compressor piston, a preparation method and application thereof.
Background
The piston is a core part of a swash plate type compressor, and makes reciprocating rectilinear motion in a cylinder body, and compressed gas is mainly completed by means of dynamic sealing of an oil film between a piston cylinder and a cylinder wall on the premise of no piston ring. Therefore, the piston cylinder is required to have higher adsorptivity to lubricating oil, and the adsorptivity is mainly solved by adding an annular groove on the outer circle of the piston cylinder or adding point-shaped pits on the surface of the outer circle in a machining mode. In addition, the piston cylinder is mostly not in direct contact with the cylinder wall during operation, and therefore, the requirement for the wear resistance of the piston cylinder is not high, and the wear resistance of the piston cylinder is mainly dependent on the raw material itself or the outer circumferential surface coating, etc. In order to reduce the energy consumption of the piston in the reciprocating motion process, the piston is mostly made of aluminum alloy materials with higher strength, and in consideration of the fact that the piston seat needs to slidingly accommodate the slipper, the piston seat part needs to be high enough in wear resistance and strength. The improvement of the wear resistance is required to ensure that the silicon content in the aluminum alloy is not less than 6.5 weight percent, and the improvement of the strength is required to ensure that the copper content in the aluminum alloy is preferably not less than 1 weight percent. At present, in order to facilitate the welding forming of the piston seat and the piston cylinder and ensure the welding strength, the piston cylinder and the piston seat are mostly made of the same grade of aluminum alloy, so that the production cost is greatly increased.
For piston barrels, if the silicon content is greater than 1.65 weight percent, eutectic silicon is produced, and the eutectic structure has poor plasticity, which is unfavorable for plastic forming of the piston barrels. In addition, when the copper silicon content is higher, the surface treatment of the piston cylinder also brings a plurality of inconveniences, such as when anodic oxidation is carried out, current is often concentrated at copper silicon segregation positions, and the product is easy to burn, damage and discard. Therefore, how to improve the above phenomenon becomes a problem to be solved at present.
CN203098195U discloses a swash plate compressor piston, this swash plate compressor piston includes piston cylinder and piston seat, the piston seat have with swash plate complex fluting, the piston seat is equipped with two relative interior terminal surfaces in the fluting, the aperture is all seted up to each interior terminal surface, two interior terminal surfaces are provided with the abaculus in opposite directions, one side of abaculus has the ball cave that is used for holding the slipper, the opposite side has plane and boss, the boss embedding aperture plays the locate action, prevent that the abaculus from producing the removal. This solution increases the strength and makes it easy to process by optimizing the piston structure, but the problems presented above cannot be solved.
Therefore, it is important to provide a compressor piston which can reduce the cost and improve the above problems with respect to the use characteristics of the respective parts of the piston.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention aims to provide a compressor piston, a preparation method and application thereof, wherein the compressor piston optimizes the raw material composition of the piston by selecting proper materials, thereby reducing the production cost; the preparation method adopts a friction stir welding technology to weld the dissimilar alloy, ensures the welding quality and is beneficial to industrial production.
To achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a compressor piston, where the compressor piston includes a piston seat and a piston cylinder, and the material of the piston seat includes a first aluminum alloy; the piston cylinder is made of a second aluminum alloy.
According to the invention, the compressor piston is made of different aluminum alloy materials according to the application characteristics of the piston seat and the piston cylinder, so that the production cost is reduced, and the large-scale production is facilitated.
The following technical scheme is a preferred technical scheme of the invention, but is not a limitation of the technical scheme provided by the invention, and the technical purpose and beneficial effects of the invention can be better achieved and realized through the following technical scheme.
As a preferable technical scheme of the invention, the composition of the first aluminum alloy comprises Si which is more than or equal to 6.5 weight percent, such as 6.5 weight percent, 7 weight percent, 7.5 weight percent, 8 weight percent, 8.5 weight percent or 9 weight percent; cu is not less than 1wt%, for example, 1wt%, 1.5wt%, 2wt%, 2.5wt%, 3wt% or 3.5wt%, etc., and the balance is aluminum, and the above values are not limited to the listed values, but other non-listed values are equally applicable within the respective value ranges.
In the invention, after the piston seat adopts the silicon copper with the content, the wear resistance and the strength of the piston seat can be effectively ensured.
As a preferable technical scheme of the invention, the composition of the second aluminum alloy comprises less than or equal to 1.65wt% of Si, such as 1wt%, 1.1wt%, 1.2wt%, 1.4wt%, 1.5wt% or 1.65wt%, and the like; cu is not more than 1wt%, for example, 0.2wt%, 0.4wt%, 0.6wt%, 0.8wt% or 1wt%, etc., and the balance is aluminum, and the above values are not limited to the recited values, but other non-recited values are equally applicable within the respective ranges of values.
In the invention, after the piston cylinder adopts the silicon-copper content, the silicon and copper contents are smaller than the solid solubility (the solid solubility of silicon is 1.65 and the solid solubility of copper is 5.6), so that eutectic structures are not formed, plastic forming is facilitated, and the production cost can be effectively reduced. In addition, along with the reduction of the content of copper and silicon, the segregation condition can be effectively improved, and the surface treatment is facilitated. For example, the surface treatment of anodic oxidation is adopted for the piston cylinder, the surface of the piston cylinder after the treatment can form a micro-pore structure vertical to the outer circular surface of the cylinder, and the micro-pores just can absorb lubricating oil, so that the abrasion can be effectively reduced, the dynamic sealing effect is improved, and in addition, a layer of Al is formed on the surface after the anodic oxidation 2 O 3 The hardness of the hardened film is far higher than that of the matrix, thereby further improvingHigh wear resistance of the piston cylinder. Because the anodic oxidation has the two characteristics, the outer surface of the later-stage piston cylinder does not need to be machined to increase the characteristic structure (such as an annular groove or a punctiform pit) for adsorbing oil; further, the surface abrasion resistance after anodic oxidation is greatly improved, so that the surface coating is not required to be added on the outer circle surface of the piston cylinder. Thereby simplifying the manufacturing process, reducing the manufacturing cost and improving the reliability of the piston cylinder.
As a preferable technical scheme of the invention, the piston seat is provided with a slot matched with the sloping cam plate and the slipper.
As a preferable technical scheme of the invention, the piston cylinder is cylindrical.
In a second aspect, the present invention provides a method for preparing a compressor piston according to the first aspect, the method comprising the steps of:
(1) Cold forging the second aluminum alloy blank, and then cutting the second aluminum alloy blank into a semi-finished product of the piston cylinder;
(2) Welding the piston cylinder semi-finished product and the piston seat semi-finished product in the step (1), and then cutting and forming to obtain a piston semi-finished product;
(3) And (3) performing anodic oxidation on the piston cylinder part of the piston semi-finished product in the step (2) to obtain the compressor piston.
According to the preparation method, the preparation process of the piston cylinder is improved, so that the whole preparation flow of the compressor piston is greatly simplified, and compared with the preparation flow of the piston cylinder in the prior art, namely blank heating (T > recrystallization temperature), die heating, hot forging forming, heat treatment (T6) strengthening, cutting machining, welding, cutting machining, surface spraying (PTFE and the like), cutting machining and finishing detection, the preparation method of the piston cylinder reduces blank heating, die heating, heat treatment (T6) and last cutting machining, effectively improves production efficiency, reduces production cost and has good economic benefit.
In the invention, the semi-finished product of the piston seat is obtained through conventional processing, and the description is omitted here.
In a preferred embodiment of the present invention, the cold forging temperature in the step (1) is 20 to 30 ℃, for example, 20 ℃, 22 ℃, 24 ℃, 26 ℃, 28 ℃, 30 ℃ or the like, but the present invention is not limited to the above-mentioned values, and other values not mentioned in the above-mentioned value range are equally applicable.
As a preferable technical scheme of the invention, the welding in the step (2) adopts a friction stir welding mode.
As a preferable technical scheme of the invention, the anode oxidation in the step (3) is followed by drying.
In the present invention, anodic oxidation is sulfuric acid anodic oxidation, which belongs to a conventional technical means in the art, and will not be described herein.
In a third aspect, the present invention provides the use of a compressor piston according to the first aspect for a swash plate compressor.
Compared with the prior art, the invention has the following beneficial effects:
(1) According to the application characteristics of the piston seat and the piston cylinder, the compressor piston is made of different aluminum alloy materials, so that the production cost of a single compressor is reduced by more than 15 yuan;
(2) The preparation method adopts the friction stir welding technology, realizes dissimilar alloy welding under the condition of ensuring welding quality, simplifies the process flow and is beneficial to industrial production.
Drawings
Fig. 1 is a schematic structural view of a compressor piston according to embodiment 1 of the present invention.
Detailed Description
For better illustrating the present invention, the technical scheme of the present invention is convenient to understand, and the present invention is further described in detail below. The following examples are merely illustrative of the present invention and are not intended to represent or limit the scope of the invention as defined in the claims.
The following are exemplary but non-limiting examples of the invention:
example 1:
the embodiment provides a compressor piston and a preparation method thereof, wherein the compressor piston comprises a piston seat 1 and a piston cylinder 2, and the material of the piston seat 1 comprises a first aluminum alloy; the material of the piston cylinder 2 comprises a second aluminum alloy. A schematic structural diagram of the compressor piston is shown in fig. 1.
The first aluminum alloy comprises 6.5wt% of Si, 1wt% of Cu and the balance of aluminum in percentage by weight.
The second aluminum alloy comprises 1.4 weight percent of Si, 0.6 weight percent of Cu and the balance of aluminum.
The piston seat 1 is provided with a slot 3 matched with the sloping cam plate and the slipper; the piston cylinder 2 is cylindrical.
The preparation method of the compressor piston comprises the following steps:
manufacturing a piston seat semi-finished product:
(1) heating the first aluminum alloy blank to 400 ℃ for heat preservation, heating the die to 200 ℃ for heat preservation, and hot forging and forming under the condition;
(2) the blank processed in the step (1) is preserved for 2 hours at 480 ℃, water quenching is carried out, then the blank is heated to 170 ℃ and preserved for 6 hours, and then cutting processing is carried out, so as to obtain a semi-finished product of the piston seat;
(1) Cold forging the second aluminum alloy blank at 25 ℃ to form, and then cutting to form a semi-finished product of the piston cylinder;
(2) Friction stir welding is carried out on the piston cylinder semi-finished product and the piston seat semi-finished product in the step (1), and then cutting, machining and forming are carried out, so that a piston semi-finished product is obtained;
(3) And (3) carrying out sulfuric acid anodic oxidation on a piston cylinder part in the piston semi-finished product in the step (2), and generating a film with the thickness of 2 mu m on the surface to obtain the compressor piston.
Example 2:
the embodiment provides a compressor piston and a preparation method thereof, wherein the compressor piston comprises a piston seat 1 and a piston cylinder 2, and the material of the piston seat 1 comprises a first aluminum alloy; the material of the piston cylinder 2 comprises a second aluminum alloy.
The first aluminum alloy comprises 8 weight percent of Si, 1.5 weight percent of Cu and the balance of aluminum.
The second aluminum alloy comprises 1.65wt% of Si, 1wt% of Cu and the balance of aluminum in percentage by weight.
The piston seat 1 is provided with a slot 3 matched with the sloping cam plate and the slipper; the piston cylinder 2 is cylindrical.
The preparation method of the compressor piston comprises the following steps:
manufacturing a piston seat semi-finished product:
(1) heating the first aluminum alloy blank to 380 ℃ for heat preservation, heating the die to 170 ℃ for heat preservation, and hot forging and forming under the condition;
(2) the blank processed in the step (1) is preserved for 2 hours at the temperature of 500 ℃, water quenching is carried out, then the blank is heated to 190 ℃ and preserved for 7 hours, and then cutting processing is carried out, so that a semi-finished product of the piston seat is obtained;
(1) Cold forging the second aluminum alloy blank at 28 ℃ to form, and then cutting to form a semi-finished product of the piston cylinder;
(2) Friction stir welding is carried out on the piston cylinder semi-finished product and the piston seat semi-finished product in the step (1), and then cutting, machining and forming are carried out, so that a piston semi-finished product is obtained;
(3) And (3) carrying out sulfuric acid anodic oxidation on a piston cylinder part in the piston semi-finished product in the step (2), and generating a film with the thickness of 4 mu m on the surface to obtain the compressor piston.
Example 3:
the embodiment provides a compressor piston and a preparation method thereof, wherein the compressor piston comprises a piston seat 1 and a piston cylinder 2, and the material of the piston seat 1 comprises a first aluminum alloy; the material of the piston cylinder 2 comprises a second aluminum alloy.
The first aluminum alloy comprises 7 weight percent of Si, 2 weight percent of Cu and the balance of aluminum.
The second aluminum alloy comprises, by weight, 1% of Si, 0.3% of Cu and the balance of aluminum.
The piston seat 1 is provided with a slot 3 matched with the sloping cam plate and the slipper; the piston cylinder 2 is cylindrical.
The preparation method of the compressor piston comprises the following steps:
manufacturing a piston seat semi-finished product:
(1) heating the first aluminum alloy blank to 420 ℃ for heat preservation, heating the die to 250 ℃ for heat preservation, and hot forging and forming under the condition;
(2) the blank processed in the step (1) is preserved for 2 hours at 460 ℃, water quenching is carried out, then the blank is heated to 180 ℃ and preserved for 6 hours, and then cutting processing is carried out, so that a semi-finished product of the piston seat is obtained;
(1) Cold forging the second aluminum alloy blank at 22 ℃ to form, and then cutting to form a semi-finished product of the piston cylinder;
(2) Friction stir welding is carried out on the piston cylinder semi-finished product and the piston seat semi-finished product in the step (1), and then cutting, machining and forming are carried out, so that a piston semi-finished product is obtained;
(3) And (3) performing sulfuric acid anodic oxidation on the piston cylinder part in the piston semi-finished product in the step (2), and generating a film of 3 mu m on the surface to obtain the compressor piston.
Comparative example 1:
the comparative example provides a compressor piston and a preparation method thereof, the compressor piston comprises a piston seat 1 and a piston cylinder 2, the piston seat 1 and the piston cylinder 2 are all made of aluminum alloy, and the weight percentages are as follows: comprises 6.5wt% of Si, 1wt% of Cu and the balance of aluminum.
The piston seat 1 is provided with a slot 3 matched with the sloping cam plate and the slipper; the piston cylinder 2 is cylindrical.
The preparation method of the compressor piston comprises the following steps:
the method of preparing the piston seat semifinished product was the same as in example 1;
(1) Heating an aluminum alloy blank to 400 ℃ for heat preservation, heating a die to 200 ℃ for heat preservation, and carrying out hot forging forming under the condition;
(2) The blank processed in the step (1) is preserved for 2 hours at 480 ℃, water quenching is carried out, then the blank is heated to 170 ℃ and preserved for 6 hours, and then cutting processing is carried out, so as to obtain a semi-finished product of the piston cylinder;
(2) Friction stir welding is carried out on the piston cylinder semi-finished product and the piston seat semi-finished product in the step (1), and then cutting, machining and forming are carried out, so that a piston semi-finished product is obtained;
(3) And (3) spraying the piston cylinder part of the piston semi-finished product in the step (2) by using polytetrafluoroethylene, and then cutting to obtain the compressor piston.
The pistons obtained in examples 1 to 3 and comparative example 1 were subjected to conventional overall durability test, and the results are shown in table 1.
TABLE 1
| Durability test of complete machine | |
| Example 1 | Meets the standard |
| Example 2 | Meets the standard |
| Example 3 | Meets the standard |
| Comparative example 1 | Meets the standard |
The invention optimizes the raw material composition of the piston cylinder part aiming at the application characteristics of the two parts, further simplifies the preparation process flow, reduces the cost of a single compressor by more than 15 yuan, but does not reduce the durability compared with the traditional process in the comparative example 1.
According to the embodiment and the comparative example, the compressor piston provided by the invention is characterized in that different aluminum alloy materials are respectively adopted according to the application characteristics of the piston seat and the piston cylinder, so that the production cost of a single compressor is reduced by more than 15 yuan; the preparation method adopts a friction stir welding technology, simplifies the process flow when the dissimilar alloy welding is realized under the condition of ensuring the welding quality, and is beneficial to industrial production.
The applicant states that the invention is illustrated by the above examples as a product and a detailed method of the invention, but the invention is not limited to, i.e. it does not mean that the invention must be practiced in dependence on the product and the detailed method. It should be apparent to those skilled in the art that any modifications, equivalent substitutions for operation of the present invention, addition of auxiliary operations, selection of specific modes, etc., are intended to fall within the scope of the present invention and the scope of the disclosure.
Claims (7)
1. A compressor piston comprising a piston seat and a piston cylinder, wherein the piston seat is made of a first aluminum alloy; the piston cylinder is made of a second aluminum alloy;
the first aluminum alloy comprises Si more than or equal to 6.5wt%, cu more than or equal to 1wt% and the balance aluminum in percentage by weight;
the second aluminum alloy comprises less than or equal to 1.65wt% of Si, less than or equal to 1wt% of Cu and the balance of aluminum in percentage by weight;
the compressor piston is prepared by a method comprising the steps of:
(1) Cold forging the second aluminum alloy blank, and then cutting the second aluminum alloy blank into a semi-finished product of the piston cylinder;
(2) Welding the piston cylinder semi-finished product and the piston seat semi-finished product in the step (1), and then cutting and forming to obtain a piston semi-finished product;
(3) Performing anodic oxidation on a piston cylinder part of the piston semi-finished product in the step (2) to obtain a compressor piston;
and (3) welding in the step (2) adopts a friction stir welding mode.
2. The compressor piston of claim 1, wherein the piston seat is provided with a slot that mates with a swash plate and a shoe.
3. The compressor piston of claim 1 wherein said piston cylinder is cylindrical.
4. A method of manufacturing a compressor piston according to any one of claims 1 to 3, comprising the steps of:
(1) Cold forging the second aluminum alloy blank, and then cutting the second aluminum alloy blank into a semi-finished product of the piston cylinder;
(2) Welding the piston cylinder semi-finished product and the piston seat semi-finished product in the step (1), and then cutting and forming to obtain a piston semi-finished product;
(3) Performing anodic oxidation on a piston cylinder part of the piston semi-finished product in the step (2) to obtain a compressor piston;
and (3) welding in the step (2) adopts a friction stir welding mode.
5. The method according to claim 4, wherein the cold forging temperature in the step (1) is 20 to 30 ℃.
6. The method according to claim 4, wherein the anodic oxidation in step (3) is followed by drying.
7. Use of a compressor piston according to any one of claims 1-3, characterized in that the compressor piston is used in a swash plate compressor.
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| CN202111440470.6A CN114109807B (en) | 2021-11-30 | 2021-11-30 | Compressor piston and preparation method and application thereof |
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| CN202111440470.6A CN114109807B (en) | 2021-11-30 | 2021-11-30 | Compressor piston and preparation method and application thereof |
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| CN114109807A CN114109807A (en) | 2022-03-01 |
| CN114109807B true CN114109807B (en) | 2024-01-05 |
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| KR20170119867A (en) * | 2016-04-20 | 2017-10-30 | (주)씨앤지 | Device for piston used in air conditioner compressor of vehicle and method for manufacturing the same |
| JP2019019373A (en) * | 2017-07-15 | 2019-02-07 | 株式会社神戸製鋼所 | Manufacturing method of aluminum alloy-made piston of compressor, and the aluminum alloy for piston |
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