KR100715023B1 - Partial surface treatment for vehicle piston - Google Patents

Abstract

The disclosed piston partial surface treatment apparatus for a vehicle includes a surface treatment tank for receiving a surface treatment liquid in contact with a cathode; A support connection part connected to a plurality of pistons to supply an anode and immersing only a portion of the upper portion of the piston in the surface treatment liquid; And a cover member for surface treatment of only a portion of the upper part of the piston immersed by the support connection part. According to the piston partial surface treatment apparatus for a vehicle configured as described above, it is possible to improve workability and productivity through a simple surface treatment operation.

Surface treatment, piston

Description

Partial surface treatment for vehicle piston

1 is a view schematically showing a partial surface treatment apparatus of a vehicle piston according to an embodiment of the present invention;

Figure 2 is an assembled perspective view showing the assembly form of the piston and the cover member and the airtight means shown in FIG.

2a to 2c is a perspective view showing the cover member and the airtight means shown in FIG.

3 and 3a is a perspective view and a bottom view showing a state in which the piston and the cover member and the airtight means shown in FIG. 2 are assembled;

4A to 4D are perspective views illustrating a process of assembling the cover member and the airtight means shown in FIG. 2 with the piston;

FIG. 5 is a perspective view of a piston partially surface treated according to the embodiment of the present invention shown in FIG. 1. FIG.

<Description of the symbols for the main parts of the drawings>

10 ... piston 100 ... surface treatment tank

110 ... inner tank 120 ... outer tank

130 ... pump 131 ... heat exchanger

132 ... Chiller 133 ... Nozzle

140 ... support base 141 ... through hole

200 ... support connection 210 ... support bar

220 ... connecting member 230 ... clamp

300 ... cover member 320 ... hollow tube

321 ... the first jaw 322 ... taper

400 ... Confidential means 410 ... Case tube

411 cylinder 412 second jaw

413 ... exhaust passage 414 ... pressurization lever

420 ... Cartridge 421 ... Support

422 ... support tube 423 ... coil spring

424 ... Groove 500 ... Partial surface treatment

The present invention relates to a partial surface treatment apparatus, and more particularly, to a vehicle piston partial surface treatment apparatus for changing the characteristics of the piston surface for a diesel vehicle.

In general, a piston for a vehicle is a reciprocating motion in a cylinder block, and the degree of deterioration of the piston due to the combustion heat during combustion must be small, the rigidity must be maintained to withstand the explosion pressure, and the temperature at which the heat of explosion is transmitted to the piston must be reduced. The requirements must be met. In addition, since the piston for the vehicle must be light so as to reduce the weight of the vehicle body with respect to the fuel economy of the vehicle in addition to the above requirements, a material of aluminum alloy is used.

However, since the aluminum alloy material is highly oxidized and highly corrosive, it is difficult to meet the requirements for durability, wear resistance and corrosion resistance, which are essential requirements for the vehicle piston as described above. Therefore, the surface of the piston should be subjected to surface treatment such as tin plating, phosphate coating and hard anodizing which can further improve wear resistance and durability and heat resistance.

As described above, in the surface treatment of the piston, in the case of the piston of a diesel vehicle, the surface treatment for durability and heat resistance is particularly important for the crown portion in direct contact with the combustion chamber. This is because, due to the characteristics of the combustion method of the diesel vehicle, the fuel is directly injected and exploded in the combustion chamber of a high temperature and high pressure, and thus the requirements for the durability and heat resistance are further demanded. However, such a piston crown part is complicated in structure, such as a combustion chamber, and needs to be subjected to partial surface treatment for a certain part, so that the mounting equipment is complicated and has a disadvantage in that the operation is difficult.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a partial piston surface treatment apparatus for a vehicle that can improve productivity and workability by efficiently improving work for partial surface treatment of a vehicle piston. It is done.

Other objects and advantages of the invention will be described below and will be appreciated by the embodiments of the invention. Furthermore, the objects and advantages of the present invention can be realized by means and combinations indicated in the claims.

The present invention for achieving the above object is a surface treatment tank for receiving a surface treatment liquid in contact with the cathode; A support connection part connected to a plurality of pistons to supply an anode and immersing only a portion of an upper portion of the piston in the surface treatment liquid; And a cover member for surface treatment of only a portion of the upper part of the piston immersed by the support connection part.

The surface treatment tank may include an inner tank in which the surface treatment liquid on which the piston is immersed is accommodated, and the surface treatment liquid supplied from the inner surface of the surface treatment liquid to the inner tank by a heat exchanger and a pump. It is preferable to make it an outer tank.

In addition, the inner tank may be further provided with a nozzle for injecting the surface treatment liquid to uniformly contact the surface treatment liquid to the surface of the piston.

The support connecting part may include a support bar connected to the anode and a forceps connected to one end of the connection member coupled to the support bar.

In addition, the cover member is a hollow tube having a first jaw extending a predetermined length vertically along the inner circumferential surface of one end portion, it may be made of a material of an insulating elastic body to be in close contact with the piston.

Here, the cover member includes a cylindrical tube surrounding the hollow tube and having a second jaw in surface contact with the first jaw, and a pressure lever rotatably connected at both ends to the outside of the cylindrical tube. A case tube, an arc-shaped support portion having a latching groove in which the pressure lever of the case tube extends on one side thereof, a support tube vertically coupled to the other side of the support portion, and partially exposed to the inside of the support tube; It is preferable to further include an airtight means including a stop member including the coil spring.

Here, it is preferable that a plurality of discharge passages are formed at one side of the second jaw of the case tube so that the surface treatment liquid in the center of the case tube can be discharged to the outside.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Prior to this, it should not be construed as being limited to the terms or words used in the specification and claims, nor to the common or dictionary meanings, and that the inventors will properly interpret the concept of terms in order to best explain their invention in the best way possible. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

Therefore, the embodiments shown in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, at the time of the present application, these can be replaced It should be understood that there may be various equivalents and variations in the range.

1 is a view schematically showing a vehicle piston partial surface treatment apparatus according to a preferred embodiment of the present invention.

Referring to the drawings, the vehicle piston partial surface treatment apparatus 500 according to a preferred embodiment of the present invention is a surface treatment tank 100 for receiving a surface treatment liquid in contact with the cathode, and is connected to a plurality of pistons to supply the anode The cover member 300 and the cover member 300 to surface-treat only a portion of the support connecting portion 200 for immersing the piston in the surface treatment liquid, and the piston immersed by the support connecting portion 200. ) Is an airtight means (400) to enable a tight contact with the piston.

Here, the surface treatment tank 100 is a heat exchanger having an inner tank 110 in which the surface treatment liquid in which the piston is immersed is received, and the surface treatment liquid overflowed from the inner tank 110. After the temperature is adjusted through the 131, and includes the outer tank 120 for receiving the surface treatment liquid supplied back to the inner tank 110 through the pump 130.

At this time, the inner tank 110 is provided with a nozzle 133 for spraying and supplying the surface treatment liquid of the outer tank 120. This is because, because the crown portion of the piston is a concave combustion chamber shape, when the piston crown portion is immersed in the surface treatment liquid downward, air cannot escape from the concave portion and the surface treatment liquid cannot be uniformly contacted. This is to improve the quality of the surface treatment by spraying the surface treatment liquid on the piston crown to make uniform contact.

In addition, the inner tub 110 is provided with a support base 140 made of a non-conductive material having a plurality of through holes 141 that are immersed in the surface treatment liquid, and the support base 140 has a piston therein. The tank 110 supports the piston coupled to the cover member 300 and the airtight means 400 to enable stable surface treatment in a predetermined position state.

That is, since the surface treatment tank 100 having the structure as described above is a double tank structure of the inner tank 110 and the outer tank 120, it is possible to always maintain a constant height of the surface treatment liquid in the inner tank, Through the heat exchanger 131 and the cooler 132, the temperature-treated surface treatment liquid is continuously supplied back to the inner tank 110 to constantly adjust the temperature of the surface treatment liquid in the inner tank 110. In addition, the piston immersed in the inner tank 110 is provided with a nozzle 133 to solve the problem of surface treatment according to the shape of the crown portion, the surface through the nozzle 133 to the piston crown portion By spraying the processing liquid, the surface of the piston is uniformly surface treated.

On the other hand, the support connecting portion 200 includes a support bar 210, the connection member 220 coupled to the support bar 210 and the tongs 230 coupled to one end of the connection member 220. .

Looking at the support connecting portion 200 of the above configuration in detail, a plurality of flexible connecting members 220 are connected to the support bar 210 is connected to the anode, the piston is detachable to the connecting member 220 Tongs 230 that can be connected to the support is coupled. At this time, the support bar 210 is connected to the anode wire 211 to receive and supply the positive electrode of the support bar 210 to the forceps 230, where the support bar 21 and the The tongs 230 may be supplied as a conductive material to directly transfer the positive electrode to the piston. In addition, the support connection part 200 may simultaneously surface-process a plurality of pistons through the support bar 210.

Here, the cover member 300 is coupled to the piston immersed in the surface treatment liquid of the inner tank 110 by the support connection part 200 so as to surface-treat only a portion of the piston crown, the cover member 300 The airtight means 400 is combined with the airtight means 400 so as to be in close airtight contact with the piston so as to clarify the boundary between the surface treated portion and the surface untreated portion of the piston.

Here, the airtight means 400 includes a case tube 410 and a finger member 420, the detailed description of the case tube 410 and the finger member 420 will be described later.

Figure 2 is an assembled perspective view showing the assembly form of the piston and the cover member and the airtight means shown in Figure 1, Figures 2a to 2c is a perspective view showing the cover member and the airtight means shown in FIG.

First, referring to FIG. 2, the cover member 300 is coupled to the upper portion of the piston 10, and the piston 10 to which the cover member 300 is coupled is inserted into the case tube 410 in this state. The finger member 420 is inserted into the lower portion of the piston 10. At this time, the pressure lever 414 is coupled to the outer surface of the case tube 410 is coupled to enable both ends to rotate.

Looking at the cover member 300, the case tube 410 and the finger member 420 in detail as follows.

2A is a view showing the cover member. Referring to the drawings, the cover member 300 is tapered 322 to be in close contact with the piston 10 along an inner circumferential surface at one end of the inner circumferential surface of the hollow tube 320. One end of the inner circumferential surface of the cylindrical tube 411 along the tapered end is provided with a first jaw 321 extending vertically in a predetermined length. In addition, the cover member may be made of an insulating elastic body that can be elastically in close contact with the piston. The insulating elastomer may be applied to a silicone rubber or rubber material, in addition to viton, nitrile-budadien rubber (NBR), ethylene propylene rubber (EPDM), NR, Teflon rubber.

Here, the cover member 300 is in close contact with the piston 10 and the cover member 300 to ensure the airtight adhesion between the surface treatment liquid between the contact surface to prevent the surface treatment boundary of the piston surface to make the surface poor The airtight means 400 is prevented is coupled.

The airtight means 400 includes a case tube 410 for inserting the piston 10 coupled to the cover member 300 therein, and the piston 10 and the cover in combination with the case tube 410. The finger member 420 may improve the surface contact force of the member 300.

2B and 2C are views illustrating a case tube and a finger member in the airtight means shown in FIG. 2. Referring to FIG. 2B, the case tube 410 has a second jaw 412 extending vertically in an inner direction along an inner circumferential surface at one end of the inner circumferential surface of the cylindrical tube 411. The pressure lever 414 is rotatably connected at both ends to the outside of the. Here, a plurality of discharge passages 413 are radially formed outside the second jaw (see FIG. 3A).

2C is a view showing the finger member. Referring to the drawings, the support member 20 has an arc-shaped support part 421 having a latching groove 424 formed on one side of the press lever 414 of the case tube 410 (see FIG. 2B), and the And a support tube 422 vertically coupled to the other side of the support part 421, and a coil spring 423 inserted to be partially exposed to the inside of the support tube 422.

3 is a perspective view showing a state in which the piston, the cover member, and the airtight means are assembled, and FIG. 3A is a bottom view thereof.

Referring to FIG. 3, the piston 10 is inserted into the cover member 300 and then inserted into the case tube 410. At this time, the pressure lever 414 provided in the case tube 410 moves the tangy. The fastening member 420 is fastened so that the stop member 420 and the case tube 410 may be separated from each other by the hook groove 424 of the member 420. In this case, since only the portion to be surface-treated in the piston crown portion is exposed to the outside, as shown in FIG. 3a, the connection is connected to the support connection part 200 in an assembled state as shown in FIG. By applying the surface treatment, the surface to be treated on the piston surface can be easily surface treated.

At this time, the discharge passage 413 is provided on the outer side of the second jaw 412 of the case tube 410 so that the surface treatment liquid sprayed by the nozzle 133 can flow out smoothly from the piston crown portion. (See FIG. 1).

4A to 4D are views illustrating a process of assembling the cover member and the airtight means configured as described above with the piston.

In the assembly process of the above components, as shown in FIG. 4A, the upper part of the piston 10 is inserted into the cover member 300. At this time, since the first jaw 321 is provided in the cover member 300, the piston 10 inserted into the cover member 300 does not come out and is caught by the first jaw 321. The position of (10) is fixed.

The piston 10 to which the cover member 300 assembled as described above (see FIG. 4A) is inserted into the case tube 410 as it is shown in FIG. 4B, and the first jaw 321; The outer surface of FIG. 2A) and the inner surface of the second jaw 412 (see FIG. 2B) are brought into surface contact with each other. Then, in order to increase the surface contact force between the first jaw and the second jaw, as shown in FIG. 4C in the above state (see FIG. 4B), the coil spring 423 of the finger member 420 has an inner side of the lower portion of the piston. Insert into contact with the force, and as shown in Figure 4d by rotating the pressure lever 414 of the case tube 410 is forced to engage the engaging groove 424 of the finger member 420 and then coupled .

In this case, the pressure lever 414 of the case tube is transmitted to the restoring force of the coil spring 423 of the finger member 420, and as a result, the piston crown is caused by the case tube 410 and the finger member 420. The first jaw 321 of the cover member 300 which is in surface contact with the portion is in close contact with each other even more hermetically.

In addition, in the assembled state as described above, the piston 10 and the cover member 300 and the airtight means 400 are firmly assembled, as well as the first jaw 321 and the cover of the cover member 300. Since the end portions of the second jaws 412 of the case tube 410 are in airtight contact with each other in a state in which they are coincident with each other, the surface treatment is performed at the crown portion of the piston 10 as shown in FIG. Only the part to be treated can be selectively surface-treated.

In the method for performing a piston surface treatment for a vehicle using the piston partial surface treatment apparatus configured as described above, the cover member is first exposed to the outside by exposing only a part of the crown portion to be surface treated to the outside from the piston which is the surface treatment object. Then cover them with airtight means to clarify the boundaries of the surface to be treated. Thus, the piston, the cover member and the airtight means is coupled to the forceps connected to the end of the connecting member, and then immersed in the surface treatment liquid and subjected to the surface treatment process.

The piston, which has undergone such a surface treatment, is subjected to a post-treatment process. The post-treatment process first washes the cover member and the covered piston, and then washes the cover member and the cover again. The washed piston is sealed on the surface, and then washed and dried again. Here, such a post-processing process is a conventional process and a detailed description thereof will be omitted. In addition, it is possible to apply a variety of manufacturing methods in addition to the above-described post-treatment process.

As described above, the vehicle piston partial surface treatment apparatus according to the present invention includes a nozzle for spraying and supplying the surface treatment liquid into the surface treatment tank so that the surface treatment liquid can be uniformly in contact with the piston surface corresponding to the shape of the piston crown portion. In addition, since the surface treatment solution was doubled between the inner and outer tanks, the surface treatment solution was circulated to maintain the temperature of the surface treatment solution and to spray the surface treatment solution with the temperature controlled into the inner tank. The effect of agitation was obtained, resulting in a more uniform contact of the surface treatment liquid with the surface of the piston, thereby improving the quality of the surface treatment.

In addition to this, since the vehicular piston partial surface treatment apparatus is subjected to hard anodizing, the piston further improves heat resistance, durability and corrosion resistance. In addition, by simply performing the work through the cover member and the airtight means, only the portion to be surface treated in the piston crown can be selectively surface treated, thereby improving workability and productivity.

As described above, the vehicular piston partial surface treatment apparatus of the present invention to which the hard anodizing treatment is applied provides the following effects.

First, by using a cover member and an airtight means, the surface treatment can be performed with only a simple operation, which greatly improves the workability, and can improve the productivity by easily surface treatment of a plurality of pistons at the same time.

Second, since the uniform contact of the surface treatment liquid is improved by using the nozzle to correspond to the shape of the piston crown, the quality of the piston can be improved.

Third, the boundary between the surface treated portion by the cover member and the airtight means can be clearly prevented to prevent heat concentration or crack and piston outer diameter coming from uneven interface.

Fourth, the surface of the piston is treated with hard anodized surface to improve the durability, corrosion resistance and heat resistance of the piston. In addition to extending the life of the engine, the life of the entire engine can be improved by improving the conditions in the cylinder.

As mentioned above, although this invention was demonstrated by the limited embodiment and drawing, this invention is not limited by this, The person of ordinary skill in the art to which this invention belongs, Of course, various modifications and variations are possible within the scope of equivalents of the claims to be described.

Claims (7)

A surface treatment tank for receiving a surface treatment liquid in contact with the cathode, a support connection portion connected to a plurality of pistons to supply the positive electrode, and immersing only a portion of the upper portion of the piston in the surface treatment liquid; and the piston immersed by the support connection portion. In the vehicle piston partial surface treatment apparatus including a cover member so that only a portion of the upper surface treatment, the cover member, A hollow tube having a first jaw extending vertically along an inner circumferential surface of one end thereof, the hollow tube being made of a material of an insulating elastic body to be in close contact with the piston; A case tube including a cylindrical tube surrounding the hollow tube and having a second jaw in surface contact with the first jaw, and a pressure lever rotatably connected at both ends to an outer side of the cylindrical tube; And An arc-shaped support portion having a latching groove formed therein through which the pressure lever of the case tube extends on one side thereof, a support tube vertically coupled to the other side of the support portion, and a coil spring inserted to be partially exposed into the support tube Partial surface treatment apparatus for a vehicle, characterized in that it further comprises an airtight means including a finger member. The method of claim 1, The surface treatment tank, An inner tank accommodating the surface treatment liquid in which the piston is immersed; And an outer tank for receiving the surface treatment liquid overflowed from the inner tank and receiving the surface treatment liquid supplied back to the inner tank by a heat exchanger and a pump. The method of claim 2, And the nozzle further comprises a nozzle for injecting the surface treatment liquid to uniformly contact the surface treatment liquid with the surface of the piston. The method of claim 1, The support connection portion, Partial surface treatment apparatus for a vehicle comprising a support bar connected to the anode, and a forceps connected to one end of the connection member coupled to the support bar. delete delete The method of claim 1, Partial surface treatment apparatus for a vehicle, characterized in that a plurality of discharge passages are formed at one side of the second jaw of the case tube to allow the surface treatment liquid in the center of the case to escape to the outside.

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