KR20080009907A - Partial surface treatment for vehicle piston - Google Patents

Abstract

A device for treating a partial surface of a vehicle piston is provided to improve quality of the piston by equally spraying a surface treatment solution using a nozzle. A device for treating a partial surface of a vehicle piston comprises a surface treatment tub(100), a connecting unit(200), and a cover member(300). The surface treatment solution contacting with a cathode is stored in the surface treatment tub. The connecting unit has an air cylinder(220) and supplies an anode to the piston. The air cylinder supports one end of the piston. The partial upper part of the piston is dipped into the surface treatment solution and being treated by the connecting unit. The surface treatment tub has an inner tub(110) and the outer tub(120). The surface treatment solution is received in the inner tub. The outer tub stores the surface treatment solution which is overflowed from the inner tub and being re-supplied to the inner tub by a heat exchanger and a pump. The inner tub has a nozzle additionally to regularly spray the surface treatment solution to the surface of the 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 sealing means shown in FIG.

3 is a perspective view showing the cover member shown in FIG.

4 is a perspective view illustrating a state in which a piston, a cover member, and a sealing unit are assembled;

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 ... air cylinder 230 ... connection member

240 ... plate 300 ... cover member

320 ... hollow tube 321 ... first jaw

322 ... taper 400 ... sealing means

500 ... Partial surface treatment unit

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 connecting portion having an air cylinder for supporting one end of the piston and supplying an anode to the piston; 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 connection member connecting the support bar and the air cylinder.

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 one end of the piston 10 is fixed The cover member 300 is provided with an air cylinder 220, and the support member 200 for supplying the anode to the piston 10, and the cover member 300 so that only a portion of the piston immersed by the support connector 200 is surface-treated. And the cover member 300 includes a sealing means 400 to enable a tight contact with the piston.

Here, the surface treatment tank 100 is a heat exchanger having a cooler 132 to the inner tank 110, the surface treatment liquid in which the piston is immersed, 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. The reason for this is that since the crevice portion of the piston is concave in the shape of a combustion chamber, when the piston crown portion is immersed in the surface treatment liquid, the air cannot escape from the concave portion and the surface treatment liquid cannot be uniformly contacted. In order to improve the quality of the surface treatment by spraying the surface treatment liquid to the piston crown portion to make a 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 sealing means 400 to enable a 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 treatment liquid, the surface of the piston is uniformly surface treated.

On the other hand, the support connection part 200 includes a support bar 210 and a connection member 230 for connecting the support bar 210 and the air cylinder 220.

Looking specifically at the support connecting portion 200 of the above configuration, a plurality of air cylinders 220 are connected to the support bar 210 is connected to the anode, the air cylinder 220 supports one end of the piston 10 Fix it.

Here, a plate-shaped plate 240 is provided at the rod end of the air cylinder 220 to press and fix one end of the piston 10.

Since the plate 240 presses one end of the piston 10 as a whole, the piston 10 is prevented from moving in the surface treatment tank 100 so that a defect does not occur during surface treatment of the piston 10. .

At this time, the support bar 210 is provided with a connecting member 230 to receive and supply the positive electrode of the support bar 210 to the air cylinder 220, the air through the connecting member 230 The anode delivered to the cylinder 220 is directly supplied to the piston 10 through the plate 240.

The support bar 210 and the air cylinder 220 are preferably made of a conductive material so that the anode can be easily transferred, and the plate 240 connected to the air cylinder 220 also adopts a conductive material such as titanium. It is preferable.

The support connection part 200 of the above structure 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 connecting portion 200 so that only a portion of the piston crown can be surface treated, and the cover member 300 The airtight means 400 is coupled to the piston 10 so as to be in close contact with the piston 10 so as to clarify the boundary between the surface-treated part and the surface-untreated part of the piston 10.

Figure 2 is an assembled perspective view showing the assembly form of the piston and the cover member and the sealing means shown in Figure 1, Figure 3 is a perspective view showing the cover member shown in Figure 2, Figure 4 is a piston and the cover member and the sealing means It is a perspective view which shows the assembled state.

First, referring to FIG. 2, a cover member 300 is coupled to an upper portion of the piston 10, and the piston 10 to which the cover member 300 is coupled is inserted into the sealing means 400 in this state.

The sealing means 400 is a cylindrical case structure in which the piston 10 can be inserted, and when the piston 10 is submerged in the surface treatment tank 100, the surface treatment liquid is prevented from penetrating the piston 10. The surface treatment boundary of the piston surface can be made clear.

Next, the cover member 300 will be described in detail.

3 is a view illustrating the cover member 300 and the drawing, the cover member 300 is tapered to be in close contact with the piston 10 along the inner circumferential surface at one end of the inner circumferential surface of the hollow tube 320. 322, and 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.

Referring to FIG. 4, in the assembling process of the piston 10 and the cover member 300, first, an upper portion 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.

Next, the piston 10 coupled to the cover member 300 assembled as described above is inserted into the sealing member 400 as it is. The sealing means 400 not only serves to bring the cover member 300 and the piston 10 into close contact with each other, but also serves to wrap a portion that should not be surface treated.

When the sealing means 400 and the cover member 300 is coupled to the piston 10 as described above, since only the portion to be surface-treated in the piston crown portion is exposed to the outside, in an assembled state as shown in FIG. 4. When the piston 10 is fixed to the plate 240 of the air cylinder 220 and immersed in a surface treatment solution and subjected to a surface treatment, the surface of the piston surface can be easily treated.

In the method for surface treatment of a vehicle piston using the piston partial surface treatment apparatus configured as described above, the cover member is exposed to the surface 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 to the outside. Then, the sealing means are combined to clarify the boundary of the surface to be treated. Thus, the piston, the cover member and the sealing means is coupled to be supported by the plate of the air cylinder, is 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 piston covered with the cover member and the sealing means, and then washes again by releasing the cover member and the sealing means. 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, since the vehicular piston partial surface treatment apparatus is subjected to hard anodization, 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 the sealing means can be surface treatment with a simple operation, significantly improved the workability, it is possible to easily surface treatment of a number of piston at the same time can improve the productivity.

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 sealing means can be cleared to prevent heat concentration or crack and piston outer diameter coming from the 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 connecting portion having an air cylinder for supporting one end of the piston and supplying an anode to the piston; And And a cover member for surface treatment of only a portion of the upper portion of the piston immersed by the support connecting portion. 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 connecting member connecting the support bar and the air cylinder. The method of claim 1, The cover member, A hollow tube having a first jaw extending a predetermined length vertically along an inner circumferential surface of one end thereof, wherein the piston partial surface treatment apparatus for a vehicle, characterized in that made of a material of insulating elastic body to be in close contact with the piston. The method of claim 5, The cover member, 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 the outside of the cylindrical tube; 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 6, 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 so that the surface treatment liquid in the center of the case can be discharged to the outside.

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