KR101702334B1 - Cooling tube for piston, ring carrier assembly, piston and manufacturing method of piston using the same - Google Patents

Cooling tube for piston, ring carrier assembly, piston and manufacturing method of piston using the same Download PDF

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Publication number
KR101702334B1
KR101702334B1 KR1020150059823A KR20150059823A KR101702334B1 KR 101702334 B1 KR101702334 B1 KR 101702334B1 KR 1020150059823 A KR1020150059823 A KR 1020150059823A KR 20150059823 A KR20150059823 A KR 20150059823A KR 101702334 B1 KR101702334 B1 KR 101702334B1
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KR
South Korea
Prior art keywords
flange portion
ring carrier
surface flange
cooling tube
piston
Prior art date
Application number
KR1020150059823A
Other languages
Korean (ko)
Other versions
KR20160128071A (en
Inventor
양준규
류관호
이정근
남현우
선주현
심우석
유인철
김춘관
Original Assignee
동양피스톤 주식회사
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Priority to KR1020150059823A priority Critical patent/KR101702334B1/en
Publication of KR20160128071A publication Critical patent/KR20160128071A/en
Application granted granted Critical
Publication of KR101702334B1 publication Critical patent/KR101702334B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • F02F3/16—Pistons  having cooling means
    • F02F3/18—Pistons  having cooling means the means being a liquid or solid coolant, e.g. sodium, in a closed chamber in piston
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D15/00—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor
    • B22D15/02—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor of cylinders, pistons, bearing shells or like thin-walled objects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/06—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of high energy impulses, e.g. magnetic energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • F02F3/0015—Multi-part pistons
    • F02F3/003—Multi-part pistons the parts being connected by casting, brazing, welding or clamping
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • F02F3/0015—Multi-part pistons
    • F02F3/003—Multi-part pistons the parts being connected by casting, brazing, welding or clamping
    • F02F2003/0061—Multi-part pistons the parts being connected by casting, brazing, welding or clamping by welding

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

The present invention provides a method of manufacturing a ring carrier, comprising: preparing a ring carrier formed in a circular ring shape; Preparing a cooling tube formed in a ring shape with one side open toward the outside; Joining the ring carrier and the cooling tube by electromagnetic pulse welding so that a cooling channel for cooling the ring carrier can be formed; And insert casting the joined cooling tube and the ring carrier. The present invention provides a cooling tube for a piston, a ring carrier assembly, a piston, and a method of manufacturing a piston using the same.

Description

Technical Field The present invention relates to a cooling tube for a piston, a ring carrier assembly, a piston, and a piston manufacturing method using the same.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling tube for a piston, a ring carrier assembly, a piston, and a method of manufacturing a piston using the same. More particularly, A ring carrier assembly, a piston, and a method of manufacturing a piston using the same. BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a cooling tube for use in a piston that transmits power to a crankshaft.

2. Description of the Related Art Generally, an automobile is an internal combustion engine (hereinafter referred to as " engine ") equipped with a cylinder for compressing a mixture of fuel and air and combusting the same by burning gasoline, diesel, liquefied natural gas, etc. and using the explosive force to rotate the crankshaft. Quot;).

Here, the engine includes a cylinder block having a plurality of cylinders formed therein, a cylinder head provided at an upper portion of the cylinder block to provide a combustion chamber, and a cylinder head which is mounted in the cylinder and performs a reciprocating motion to / And a piston for receiving the generated high-temperature and high-pressure gas pressure to transmit the power to the crankshaft through the connecting rod.

At this time, a salt core or a ceramic core made of a salt material is used to form a cooling channel in the cast aluminum piston.

However, the time required to remove the salt core or the ceramic core used in the conventional piston manufacturing method is long in order to remove the cooling channel, and due to the drying of the core or the reaction between the melt and the core, And thus pores or oxides or minute cracks may occur around the cooling channel. In addition, the molten metal and the core injected into the metal mold are not tightly coupled to each other due to the generation of surface tension due to the difference in properties such as temperature and density, thereby causing a problem of lowering the casting quality in the vicinity of the cooling channel. Further, since the insert ring and the core are used separately, the normal core of the manufacturing process, the insert ring, and the upper portion of the piston must be maintained to have a uniform wall thickness, thereby lowering the cooling efficiency.

It is an object of the present invention to solve the various problems including the above problems. It is an object of the present invention to improve the cooling efficiency by integrating the insert ring and the cooling channel for replacing the core to integrate the insert ring, A cooling tube for a piston, a ring carrier assembly, a piston, and a method of manufacturing a piston using the same. However, these problems are exemplary and do not limit the scope of the present invention.

According to one aspect of the present invention, a piston manufacturing method is provided. The piston manufacturing method includes the steps of: preparing a ring carrier formed in a circular ring shape; Preparing a cooling tube formed in a ring shape with one side open toward the outside; Joining the ring carrier and the cooling tube by electromagnetic pulse welding so that a cooling channel for cooling the ring carrier can be formed; And insert casting the bonded cooling tube and the ring carrier.

According to another aspect of the invention, a ring carrier assembly is provided. The ring carrier assembly includes: a ring carrier formed in a circular ring shape; And a cooling tube joined to the ring carrier by electromagnetic pulse welding so that a cooling channel for cooling the ring carrier can be formed.

The cooling tube includes: an upper surface flange portion formed to be joined to an upper surface of the ring carrier; A lower flange portion formed to be connected to a lower surface of the ring carrier; And a flow path portion formed by connecting the upper surface flange portion and the lower surface flange portion so that the refrigerant can be moved.

The upper surface or the lower surface of the ring carrier and the lower surface of the upper surface flange portion or the upper surface of the lower surface flange portion may be electromagnetic pulse welded to form a waveform.

According to another aspect of the present invention, a cooling tube is provided. The cooling tube includes: an upper surface flange portion formed to be joined to an upper surface of the ring carrier; A lower flange portion formed to be joined to a lower surface of the ring carrier; And a flow path portion formed by connecting the upper surface flange portion and the lower surface flange portion so that the refrigerant can be moved, and the upper surface flange portion and the lower surface flange portion are formed by connecting the upper surface flange portion, the lower surface flange portion, A first distance formed between one side of the upper surface flange portion and one side of the lower surface flange portion and a second distance formed between the other side of the upper surface flange portion and the other side of the lower surface flange portion so as not to cause a gap in the joint surface, The second distance formed may be different.

Wherein the upper surface flange portion includes: a first flange portion parallel to the upper surface of the ring carrier and connected to the flow path portion; A second flange portion that is formed by being first bent upward or downward from the first flange portion; And a third flange portion formed in the second flange portion so as to be secondarily bent so as to be parallel to the upper surface of the ring carrier.

Wherein the upper surface flange portion and the lower surface flange portion are located between one side of the upper surface flange portion and one side of the lower surface flange portion with a second distance formed between the other side of the upper surface flange portion connected to the flow path portion and the other side surface of the lower surface flange portion And an intermediate portion having a first distance formed to be wider and formed convex inward with the ring carrier.

According to another aspect of the present invention, a piston is provided. The piston includes a piston body; And a ring carrier assembly formed by inserting inserts into the intermediate portion of the piston body so that refrigerant can be moved, wherein the ring carrier assembly includes: a ring carrier formed in a circular ring shape; And a cooling tube that can be joined to the ring carrier by electromagnetic pulse welding so that a cooling channel for cooling the ring carrier can be formed.

Wherein the piston body is formed of a first material, the ring carrier is formed of a second material different from the first material, and the cooling tube is formed of a third material different from the first material or the second material May be formed.

The piston body may be an aluminum-based material and the ring carrier may be a steel or cast iron-based material, for example, an austenitic cast iron of Ni-resist, and the ring carrier may be insert cast into the piston body.

According to an embodiment of the present invention as described above, a method of manufacturing an aluminum piston is remarkably simplified by insert casting a ring carrier assembly having a formed cooling channel in place of an insert ring and a salt core into an annular member, It is possible to improve the cooling efficiency by integrating the ring carrier and the cooling channel to replace the salt core and to prevent the breakage of the piston due to the casting quality degradation in the vicinity of the cooling channel due to the use of the salt core in the conventional casting of the piston, It is possible to simplify the joining process and increase the productivity by using the pulse method. Of course, the scope of the present invention is not limited by these effects.

1 is a perspective view illustrating a ring carrier assembly according to an embodiment of the present invention.
Figure 2 is a cross-sectional view of the ring carrier assembly of Figure 1;
Figure 3 is an enlarged view showing the mating face of the ring carrier assembly of Figure 1;
4 is a cross-sectional view illustrating a cooling tube according to another embodiment of the present invention.
5 is a cross-sectional view illustrating a cooling tube according to another embodiment of the present invention.
6 is a cross-sectional view illustrating a cooling tube according to another embodiment of the present invention.
7 is a cross-sectional view showing a piston according to another embodiment of the present invention.
FIGS. 8 to 12 are sectional views showing a manufacturing process of the piston of FIG.
13 is a flowchart showing a piston manufacturing method for manufacturing the piston of Fig.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood, however, that the invention is not limited to the disclosed embodiments, but may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, Is provided to fully inform the user. Also, for convenience of explanation, the components may be exaggerated or reduced in size.

The piston referred to in the present invention performs a linear reciprocating motion in the cylinder to generate a rotational force in the crankshaft through the connecting rod and a power received from the gas of high temperature and pressure in the explosion stroke, Can receive the force from each of them and can act on them.

FIG. 1 is a perspective view showing a ring carrier assembly 100 according to one embodiment of the present invention, and FIG. 2 is a cross-sectional view showing the ring carrier assembly 100 of FIG.

1 and 2, a ring carrier assembly 100 according to an embodiment of the present invention includes a ring carrier 10 formed in a circular ring shape and a cooling channel 10 for cooling the ring carrier 10, And a cooling tube 20 joined to the ring carrier 10 by electromagnetic pulse welding so that the ring carrier 10 can be formed.

As shown in Figures 1 and 2, the ring carrier 10 is configured to receive a piston ring (not shown) which, in compression and explosion strokes, And a plurality of rings are provided in the piston ring groove by cutting a part of the ring and giving appropriate elasticity.

1 and 2, the cooling tube 20 includes an upper surface flange portion 21 formed to be joined to an upper surface of the ring carrier 10, and a lower surface flange portion 21 formed to be joined to a lower surface of the ring carrier 10 And a flow path portion 23 formed by connecting the upper flange portion 21 and the lower surface flange portion 22 so that the lower flange portion 22 and the coolant C can be moved. It is also important for the cooling tube 20 to be bonded in the absence of stresses that may affect the result of bonding between the ring carriers 10 and for this purpose the dimensional accuracy of the cooling tube 20 may be required have. Further, the refrigerant (C) may include, but is not necessarily limited to, cooling oil and cooling water.

FIG. 3 is an enlarged view showing a joint surface J of the ring carrier assembly 100 of FIG.

3, the upper surface or the lower surface of the ring carrier 10 and the upper surface of the lower surface flange portion 22 of the upper surface flange portion 21 are electromagnetic pulse welded so that a joint surface J formed in a wave form is formed . When a high current flows through a coil during electromagnetic welding using electromagnetic pulse welding, an electromagnetic field is formed on both sides of the overlapping plate, and a wave pattern similar to explosion welding due to collision between plate materials is formed. And a seam welding part having a plurality of seam welds.

4-6 are cross sectional views showing cooling tubes 30, 40, 50 according to various embodiments of the present invention.

A lower flange portion 22 formed to be joined to a lower surface of the ring carrier 10 and a lower flange portion 22 formed to be joined to a lower surface of the ring carrier 10 and a coolant C And a flow path portion 23 formed by connecting the upper surface flange portion 21 and the lower surface flange portion 22 so that the upper surface flange portion 21 and the lower surface flange portion 22 can be moved, One side of the upper surface flange portion 21 and the lower surface flange portion 22 of the upper surface flange portion 21 and the lower surface flange portion 22 are formed so as to prevent a gap from being created in the joint surface J when the ring carrier 10 is welded by the electromagnetic pulse. 22 and the second distance D2 formed between the other side of the upper surface flange portion 21 and the other side of the lower surface flange portion 22 may be different from each other.

4, the upper surface flange portion 21 of the cooling tube 30 includes a first flange portion 21 that is formed in parallel with the upper surface of the ring carrier 10 and connected to the flow path portion 23 And a second flange portion 21-2 and a second flange portion 21-2 which are bent downwardly from the first flange portion 21-1 so as to be narrower than the first flange portion 21-1, And a third flange portion 21-3 which is formed by being bent secondarily to be narrower than the first flange portion 21-1 in parallel with the upper surface of the ring carrier 10 in the second flange portion 21-2. Here, the lower surface flange portion 22 can be formed so as to correspond to the upper surface flange portion 21. [ Therefore, when the electromagnetic pulse welding is performed by the ring carrier 10 and the coil C, the gap between the ring carrier 10 and the coil C is sequentially pressed from the joint surface, Can occur. And can be firmly fixed during casting in the casting step to be described later, thereby improving cooling efficiency and quality.

A lower flange portion 22 formed to be joined to a lower surface of the ring carrier 10 and a lower flange portion 22 formed to be connected to a lower surface of the ring carrier 10 and a coolant C And a flow path portion 23 formed by connecting the upper surface flange portion 21 and the lower surface flange portion 22 so that the upper surface flange portion 21 and the lower surface flange portion 22 can be moved, One side of the upper surface flange portion 21 and the lower surface flange portion 22 of the upper surface flange portion 21 and the lower surface flange portion 22 are formed so as to prevent a gap from being created in the joint surface J when the ring carrier 10 is welded by the electromagnetic pulse. 22 and the fourth distance D4 formed between the other side of the upper surface flange portion 21 and the other side of the lower surface flange portion 22 may be different from each other.

5, the upper surface flange portion 21 included in the cooling tube 40 includes a first flange portion (not shown) formed parallel to the upper surface of the ring carrier 10 and connected to the flow path portion 23 A second flange portion 21-2 which is first bent upward in the first flange portion 21-1 and formed so as to be wider than the first flange portion 21-1, And a third flange portion 21-3 formed in the flange portion 21-2 by being secondarily bent in parallel with the upper surface of the ring carrier 10 and wider than the first flange portion 21-1. Here, the lower surface flange portion 22 can be formed so as to correspond to the upper surface flange portion 21. [ Thus, when the electromagnetic pulse welding is performed by the ring carrier 10 and the coil C, they are sequentially pressed from the joint surface, so that a clearance is not generated, thereby improving cooling efficiency and quality.

6, the upper surface flange portion 21 and the lower surface flange portion 22 are connected to the other side of the upper surface flange portion 21 connected to the flow path portion 23 and the lower surface flange portion 22, A fifth distance D5 formed between one side of the upper surface flange portion 21 and one side of the lower surface flange portion 22 is wider than a sixth distance D6 formed between the other side of the ring carrier 10, And an intermediate portion 21-4 formed to be convex inward. Thus, when the intermediate portion 21-4 is convexly formed, it can be pressed more sequentially from the bonding surface.

As shown in FIGS. 4 to 6, a step is formed between the upper face flange 21 and the lower face flange 22 so as not to create a gap when pressed by the ring carrier 10 and the coil C during electromagnetic pulse welding And may be formed so as to be sequentially pressed from the bonding surface. The upper flange portion 21 and the lower flange portion 22 are widened from the flow path portion 23 side toward the outer side as shown in Fig. 4 or narrow as shown in Figs. 5 and 6 Size, shape, and stresses affecting the cooling tubes 30, 40,

7 is a cross-sectional view showing a piston 1000 according to another embodiment of the present invention.

And a ring carrier assembly 100 formed by inserting inserts into the piston body 110 and the intermediate portion of the piston body 110 so that the refrigerant C can be moved, The ring carrier assembly 100 may include a ring carrier 10 formed in a circular ring shape and an electromagnetic pulse welded to the ring carrier 10 such that a cooling channel for cooling the ring carrier 10 may be formed. And a cooling tube 20 having a plurality of cooling tubes.

The ring carrier assembly 1000 includes a piston body 110 and a ring carrier assembly 1000 formed by inserting inserts into the intermediate portion of the piston body 110 to allow refrigerant C to move therethrough. A ring carrier 10 formed in a circular ring shape and a cooling tube 20 that can be joined to the ring carrier 10 by electromagnetic pulse welding so that a cooling channel for cooling the ring carrier 10 can be formed .

Although not shown, the structure of the piston 1000 may be composed of a head portion, a ring portion, a skirt portion, and a pin boss portion. Here, the head part forms a part of the combustion chamber, and the rib may be provided on the rear surface, and the rib can rapidly transfer the heat of the head part to the piston ring or the skirt part and reinforce the piston.

Wherein the piston body (110) is formed of a first material, the ring carrier (10) is formed of a second material different from the first material, and the cooling tube (20) The second material may be formed of a third material different from the second material. For example, the piston body 110 is made of aluminum (Al), the ring carrier 10 is made of steel or cast iron, and the ring carrier 10 is made of insert casting .

8 to 12 are sectional views showing the manufacturing process of the piston 1000 of FIG.

As shown in Figs. 8 and 9, a ring carrier 10, which is formed in a circular ring shape and is capable of receiving the piston ring, is prepared, and then formed to be able to be joined to the upper surface of the ring carrier 10 A lower flange portion 22 formed to be able to be joined to a lower surface of the ring carrier 10 and an upper flange portion 21 and a lower surface flange portion 22 so that the refrigerant C can be moved. And a flow path portion 23 formed by connecting the cooling tube 20 and the cooling tube 20 to each other.

As shown in Figs. 10 and 11, the ring carrier 10 and the cooling tube 20 can be joined using electromagnetic pulse welding. At this time, electromagnetic pulse welding is used to join the ring carrier 10 and the cooling tube 20, and the cooling tube 20 and the ring carrier 10 are installed in the coil C, can do.

10, a cooling tube 20 and a ring carrier 10 are provided in a coil C to generate a high-speed collision between the two metals by using an electromagnetic force, so that the cooling tube 20 and the ring carrier 10 (10). At this time, as shown in FIG. 11, the junction surface of the cooling tube 20 and the ring carrier 10 may be formed into a waveform.

Electro magnetic pulse welding is a method of machining metal without physical contact because it uses electromagnetic force by magnetic field. It is used in welding (including brazing and soldering), mold Cause of contamination High-quality products can be produced without the need for welding materials, gas, sparing materials, flux, lubricant and cleaning oil. In addition, since it is possible to work in the plated state, it is possible to reduce the pollutants discharged from the plating process by omitting the post-process of re-plating when defects are generated in the existing process, Power consumption is very low and the work time can be saved.

Electromagnetic pulse welding can bond metal by generating high-speed collision between two metals by using electromagnetic force generated by momentary discharge of charged high energy. For example, when a capacitor charged in advance is discharged instantaneously at a junction with different materials and a current is passed through the coil, a very strong magnetic field is generated and an induction current may be generated in an outer tube of an electrical conductor. Here, the junction can be made by the electromagnetic force due to the repulsion due to the interaction of the two currents.

This electromagnetic force causes the bonding material to flow in the same direction as the fluid when the bonding material is over the yield strength of the base material after colliding with the inner material, and it is possible to remove the impurities around the welding portion by metal jet, Metallurgical bonding can be achieved even though there is little heat generation due to process speed. As such, it may include a pancake type coil applicable to the inner and outer circular coils and the plate material applicable to the expansion of the pipe and the shaft pipe, and it is also possible to use a flux concentrator to concentrate the magnetic force As shown in FIG.

The coil is used to instantaneously generate a high magnetic field on the surface of the workpiece and to bond the metal. The coil is used for connecting the metal with the dimension and shape determined by the kind of the work and the size of the workpiece, the relationship between the magnetic flux time of the generated magnetic field, It can be designed to have an adequate inductance to prevent damage, sufficient mechanical strength and mass to withstand impact during the process and maintain safety.

Generally, beryllium copper having a large mechanical strength and low electrical resistance is processed and used. In the form of a coil, a solenoid type compression coil which is joined from the outside to the inside according to the applied product, and an expansion coil And flat plate coils used for workpieces of flat plates can be used.

Then, as shown in Fig. 12, the bonded ring carrier 10 and the cooling tube 20 can be cast. The ring carrier assembly 100, which is the junction of the ring carrier 10 and the cooling tube 20 formed after the electromagnetic pulse welding, is insert cast into the casting to form a piston. Specifically, the cooling tube 20 and the ring carrier 10 to which the bonding is applied are installed in a mold frame T and a lower mold frame B to perform insert casting. Although not shown in the drawings, the casting method of the present invention is not limited to the one described above. The casting process may be a casting process, a casting process, a molding process, a melting process, . Thus, it is possible to manufacture a piston having an effect of simplifying the manufacturing method of the substitute piston for the insert ring and the salt core, and simplifying the joining process and increasing the productivity.

13 is a flowchart showing a piston manufacturing method for manufacturing the piston 1000 of FIG.

7 and 13, the piston manufacturing method includes a step (S-1) of preparing a ring carrier 10 formed in a circular ring shape and a step (S-1) of forming a ring- (S-2) of preparing the cooling tube 20 and the ring carrier 10 and the cooling tube 20 so that a cooling channel for cooling the ring carrier 10 can be formed. (S-3) joining the ring carrier 10 with magnetic pulse welding (S-3), and insert casting the bonded cooling tube 20 and ring carrier 10 (S-4).

Accordingly, a piston made of a cooling tube for a piston, a ring carrier assembly, a piston and a piston manufacturing method using the same, has a ring carrier assembly having a formed cooling channel for replacing the insert ring and the salt core, The manufacturing method of the aluminum piston is remarkably simplified by casting and the cooling channel to be replaced with the ring carrier and the ceramic core or the salt core is joined to one body to improve the cooling efficiency and to improve the cooling efficiency in the vicinity of the cooling channel It is possible to reduce the occurrence of the breakage problem of the piston due to the lowering of the casting quality and also to have the effect of simplifying the joining process and increasing the productivity by using the electromagnetic pulse method as the joining method.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

10: Ring carrier
20, 30, 40, 50: cooling tube
21: upper surface flange portion
21-1: First flange portion
21-2: second flange portion
21-3: Third flange portion
22: Lower flange portion
23:
J: joint surface
100: ring carrier assembly
110: Piston body
1000: Piston

Claims (10)

Preparing a ring carrier formed in a circular ring shape;
Preparing a cooling tube formed in a ring shape with one side open toward the outside;
Joining the ring carrier and the cooling tube by electromagnetic pulse welding so that a cooling channel for cooling the ring carrier can be formed; And
Insert casting the bonded cooling tube and the ring carrier;
Lt; / RTI >
The cooling tube may include:
An upper flange portion formed to be joined to an upper surface of the ring carrier;
A lower flange portion formed to be joined to a lower surface of the ring carrier; And
A flow path portion formed by connecting the upper surface flange portion and the lower surface flange portion so that the refrigerant can be moved;
Lt; / RTI >
The upper surface flange portion and the lower surface flange portion,
A first distance formed between one side of the upper surface flange portion and one side of the lower surface flange portion so that a gap is not formed between the upper surface flange portion, the lower surface flange portion, and the ring carrier, Wherein a second distance formed between the other side of the upper surface flange portion and the other side of the lower surface flange portion is different. A ring carrier formed in a circular ring shape; And
A cooling tube that can be joined to the ring carrier by electromagnetic pulse welding so that a cooling channel for cooling the ring carrier can be formed;
Lt; / RTI >
The cooling tube may include:
An upper flange portion formed to be joined to an upper surface of the ring carrier;
A lower flange portion formed to be joined to a lower surface of the ring carrier; And
A flow path portion formed by connecting the upper surface flange portion and the lower surface flange portion so that the refrigerant can be moved;
Lt; / RTI >
The upper surface flange portion and the lower surface flange portion,
A first distance formed between one side of the upper surface flange portion and one side of the lower surface flange portion so that a gap is not formed between the upper surface flange portion, the lower surface flange portion, and the ring carrier, Wherein a second distance formed between the other side of the upper surface flange portion and the other side of the lower surface flange portion is different. delete 3. The method of claim 2,
The upper surface or the lower surface of the ring carrier and the lower surface of the upper surface flange portion or the upper surface of the lower surface flange portion are welded by electromagnetic pulse welding to form a waveform;
≪ / RTI > An upper flange portion formed to be joined to an upper surface of the ring carrier;
A lower flange portion formed to be joined to a lower surface of the ring carrier; And
A flow path portion formed by connecting the upper surface flange portion and the lower surface flange portion so that the refrigerant can be moved;
Lt; / RTI >
The upper surface flange portion and the lower surface flange portion,
A first distance formed between one side of the upper surface flange portion and one side of the lower surface flange portion so that a gap is not formed between the upper surface flange portion, the lower surface flange portion, and the ring carrier, Wherein a second distance formed between the other side of the upper surface flange portion and the other side of the lower surface flange portion is different. 6. The method of claim 5,
The upper flange portion
A first flange portion parallel to an upper surface of the ring carrier and connected to the flow path portion;
A second flange portion that is formed by being first bent upward or downward from the first flange portion; And
A third flange portion formed in the second flange portion so as to be secondarily bent so as to be parallel to the upper surface of the ring carrier;
And a cooling tube. 6. The method of claim 5,
The upper surface flange portion and the lower surface flange portion,
A first distance formed between one side of the upper surface flange portion and one side of the lower surface flange portion is wider than a second distance formed between the other side of the upper surface flange portion connected to the flow path portion and the other side surface of the lower surface flange portion,
An intermediate portion formed to be convex inward with the ring carrier;
Further comprising a cooling tube. A piston body;
A ring carrier assembly formed by inserting a coolant into an intermediate portion of the piston body;
Lt; / RTI >
The ring carrier assembly includes:
A ring carrier formed in a circular ring shape; And
A cooling tube that can be joined to the ring carrier by electromagnetic pulse welding so that a cooling channel for cooling the ring carrier can be formed;
Lt; / RTI >
The cooling tube may include:
An upper flange portion formed to be joined to an upper surface of the ring carrier;
A lower flange portion formed to be joined to a lower surface of the ring carrier; And
A flow path portion formed by connecting the upper surface flange portion and the lower surface flange portion so that the refrigerant can be moved;
Lt; / RTI >
The upper surface flange portion and the lower surface flange portion,
A first distance formed between one side of the upper surface flange portion and one side of the lower surface flange portion so that a gap is not formed between the upper surface flange portion, the lower surface flange portion, and the ring carrier, Wherein a second distance formed between the other side of the upper surface flange portion and the other side of the lower surface flange portion is different. 9. The method of claim 8,
Wherein the piston body comprises:
A first electrode formed of a first material,
The ring carrier
A second material formed of a second material different from the first material,
The cooling tube may include:
And the second material is formed of a third material different from the first material or the second material. 9. The method of claim 8,
Wherein the piston body is made of an aluminum-based material and the ring carrier is of a steel or cast iron series and the ring carrier is insert cast into the piston body.
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Citations (3)

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Publication number Priority date Publication date Assignee Title
JP2004536258A (en) 2001-07-30 2004-12-02 ロベルト オスカー アポ Method of mounting a metal seat ring assembled and welded in a carrier hoop to form an annular cooling tube of a piston of an internal combustion engine, and a method of manufacturing a fin metal seat ring assembled in a carrier hoop
JP2006036771A (en) 2004-07-26 2006-02-09 Probitas Pharma Sa Therapeutic human albumin solution having low prekallikrein activator (pka) activity and method for obtaining the same
JP2011157973A (en) * 2011-03-18 2011-08-18 Toyota Motor Corp Method of manufacturing piston with abrasion resistant ring for piston

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011010216A1 (en) * 2011-02-03 2012-08-09 Pst Products Gmbh Pulse welder for metal welding

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
JP2004536258A (en) 2001-07-30 2004-12-02 ロベルト オスカー アポ Method of mounting a metal seat ring assembled and welded in a carrier hoop to form an annular cooling tube of a piston of an internal combustion engine, and a method of manufacturing a fin metal seat ring assembled in a carrier hoop
JP2006036771A (en) 2004-07-26 2006-02-09 Probitas Pharma Sa Therapeutic human albumin solution having low prekallikrein activator (pka) activity and method for obtaining the same
JP2011157973A (en) * 2011-03-18 2011-08-18 Toyota Motor Corp Method of manufacturing piston with abrasion resistant ring for piston

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