KR100780090B1 - Valve seat processing method and the jig system of solenoid valve for brake system - Google Patents

Abstract

A method for processing a valve seat of a solenoid valve for a brake system and a jig system thereof are provided to contact an opening and closing ball with the edge and the chamfering surface of the valve seat by grinding the edge and the chamfering surface with micro particles. A method for processing a valve seat(7) of a solenoid valve for a brake system includes the steps of: preparing a jig having a lower plate with a plurality of penetration holes, an intermediate plate provided with a plurality of holes for combining the valve seat, and an upper plate with holes through which particles pass; preparing micro particles for grinding the valve seat contacting with an opening and closing ball(6); installing each valve seat to each hole of the intermediate plate; mounting the upper plate and the lower plate to the intermediate plate; grinding an edge(7b) and a chamfering surface(7c) of the valve seat by feeding micro particles to the holes of the lower plate, the valve seat, and the upper plate; disassembling the upper plate, the intermediate plate, and the lower plate to separate the valve seat from the intermediate plate, after grinding the valve seat.

Description

Valve seat processing method of solenoid valve for brake system and its jig system {Valve seat processing method and the jig system of solenoid valve for brake system}

1 and 2 is a schematic cross-sectional view showing a solenoid valve for a conventional brake system and a partial enlarged cross-sectional view taken from the main portion of the valve seat

Figure 3 is a schematic separation perspective view showing a valve seat jig system of the solenoid valve for the brake system of the present invention

4 is a schematic cross-sectional view of FIG.

5 is a cross-sectional view showing the state that the upper edge and the chamfered surface of the valve seat is processed

Figure 6 is a flow chart showing sequentially the valve seat processing method of the solenoid valve for the brake system of the present invention

* Description of the symbols for the main parts of the drawings *

10: lower plate 11: particle through hole (lower plate)

12: screw hole (bottom plate) 13: center coupling hole (bottom plate)

14: lower handle 15: support leg

20: Intermediate plate 21: Valve seat coupling hole (of middle plate)

22: side through hole (of middle plate) 23: center through hole (of middle plate)

24: middle plate handle 30: top plate

31: Particle through hole (top) 32: Side engagement hole (top)

33: center through hole (of the top plate) 34: top handle

35: mounting space 40: auxiliary plate

41: particle through hole (of the auxiliary plate) 50: ultrafine particles

60: hydraulic device 61: bottom piston

62: upper piston 63: hydraulic pump

71: side fastening bolt 72: center fastening bolt

73: central fastening nut

The present invention relates to a solenoid valve for a brake system, and more particularly, to a valve seat processing method and a jig system for a solenoid valve for a brake system capable of precisely processing a ball contact portion of a valve seat embedded in a solenoid valve. will be.

The brake system of the vehicle is designed to prevent the slip of the wheel by periodically regulating the braking hydraulic pressure transmitted to the wheel side, and the solenoid valve of the brake hydraulic line connected with the wheel cylinder on the wheel periodically Intermittent braking pressure is to be formed while opening and closing.

In the brake system, the solenoid valve includes a valve core 1 having a through hole 1a in the longitudinal direction formed in the center thereof and a communication passage 1b formed in the radial direction in the center thereof. An armature 3 that can be retracted is provided inside the valve dome 2 that closes one end of the valve core 1, and an excitation coil 4 that pushes the armature 3 forward and backward on the outside of the valve dome 2. Is installed.

A plunger 5 interlocked with the operation of the armature 3 is installed in the through hole 1a of the valve core 1, and the opening and closing ball 6 is coupled to the lower end of the plunger 5. In the valve core 1 below the plunger 5, an orifice 7a having a predetermined diameter is formed in the center so that the valve can be opened and closed when the plunger 5 moves forward and backward. The valve seat 7 which is press-fitted and fixed to the inner surface of the through hole 1a is installed. One end of the plunger 5 is provided with a return spring 8 for returning the plunger 5 and the armature 3 to open the flow path when no power is applied to the excitation coil 4.

Such a solenoid valve has an armature 3 advancing toward the valve core 1 by the magnetic force between the armature 3 and the valve core 1 adjacent thereto when power is applied to the excitation coil 4 and the plunger 5. Closes the orifice 7a while advancing toward the valve seat 7. When no power is applied to the excitation coil 4, the magnetic force is released and the orifice 7a is opened while the plunger 5 and the amateur 3 retreat by the elasticity of the return spring 8. As such, the solenoid valve interrupts the supply of oil flowing through the brake hydraulic line while the orifice 7a is repeatedly closed or opened in accordance with the advancing and retracting operation of the plunger 5.

This type of brake system requires safety first, and therefore, each component must be driven correctly according to a defined function. In particular, an accurate opening and closing should be made between the orifice 7a of the valve seat 7 into which oil flows in and the opening and closing ball 6 intermittently intercepting the orifice 7a. When the top of the orifice 7a of the seat 7 is closed, the corner 7b and the chamfer 7c of the upper circumference of the orifice 7a contacting the opening / closing ball 6 should be precisely machined.

However, the conventional valve seat 7 is used by mounting the solenoid valve without machining the orifice (7a) and the corner (7b) and the chamfered surface (7c) of the top of the orifice (7a) without a precise finishing process. Accordingly, reliable line contact or surface contact is not made between the opening / closing ball 6 and the circumference of the edge 7b of the valve seat 7 or the chamfered surface 7c circumferentially, but instead of the intermittent line contact. Or, the point contact was not made securely sealed, there was a risk of safety accidents.

SUMMARY OF THE INVENTION An object of the present invention for solving the above problems is to provide a valve seat processing method for a solenoid valve for a brake system and a jig system for precisely machining the periphery of the upper edge of the orifice and the chamfered surface.

Another object of the present invention is to provide a valve seat processing method of a solenoid valve for a brake system and a jig system for ensuring contact between a circumference and a ball circumference of a valve seat and a chamfered surface circumference.

Valve seat processing method of the solenoid valve for the brake system of the present invention for achieving the above object, the lower plate is formed with a plurality of particle through holes, and a plurality of valve seat coupling holes to be seated on the lower plate and opposed to the particle through hole A jig preparing step of preparing an intermediate plate having a plurality of particles formed therein and having a valve seat coupled to the valve seat coupling hole, and a top plate having particle through holes formed on the intermediate plate and facing the valve seat coupling holes; An ultra-fine particle preparation step of preparing ultra-fine particles for grinding the valve seat portion in contact with the opening and closing ball; A valve seat mounting step of mounting the valve seat to the valve seat coupling holes of the intermediate plate, respectively; Jig assembly step of assembling the upper plate and the lower plate respectively to the intermediate plate; A valve seat processing step of processing the opening / closing ball contact portion of the valve seat by repeatedly passing the ultra fine particles through the holes of the lower plate, the valve seat, and the upper plate; Characterized in that the valve seat separation step of separating the valve seat from the intermediate plate by separating the lower plate, the intermediate plate, the upper plate when the processing of the valve seat is completed.

Another feature of the valve seat processing method of the solenoid valve for the brake system of the present invention, in the ultra-fine particles preparation step, the ultra-fine particles may be made of any one of silicon carbide, borazone, alumina, diamond.

Another feature of the valve seat processing method of the solenoid valve for the brake system of the present invention, in the jig assembly step, by matching the threaded hole of the lower plate and the through hole of the middle plate and the coupling hole of the upper plate and by coupling the side fastening bolt to the Fixing the lower plate, the middle plate and the upper plate, and fastening the central fastening bolt and the central fastening nut to the central engaging hole of the lower plate, the central through hole of the intermediate plate and the central through hole of the upper plate, Reinforce the assembly.

Another feature of the valve seat processing method of the solenoid valve for the brake system of the present invention, in the valve seat processing step, the pumping pressure of the ultra-fine particles passing through the holes of the jig is 700 ~ 1200psi, the processing time of the valve seat The vertical movement of the ultra-fine particles is performed for 2 to 6 minutes.

Another feature of the valve seat processing method of the solenoid valve for the brake system of the present invention, in the valve seat processing step, the valve seat is made of stainless material.

Another feature of the valve seat processing method of the solenoid valve for the brake system of the present invention, in the valve seat processing step, the opening and closing ball contact portion of the valve seat is maintained in the corner portion of the top of the orifice R 0.1 ~ 0.5 mm and the top of the orifice The surface roughness of the chamfered surface of Rz is machined to maintain 0.1 to 0.5 micron.

The valve seat jig system of the solenoid valve for a brake system of the present invention for achieving the above object is a lower plate formed with a plurality of particle through holes; An intermediate plate seated on the lower plate and having a plurality of valve seat coupling holes formed to face the particle through hole, and having a valve seat coupled to the particle through hole; An upper plate seated on the intermediate plate and having particle through holes formed so as to face the valve seat coupling holes; Fastening means fastened to the lower plate, the middle plate, and the upper plate; Polishing means for polishing the opening and closing ball contact portion of the valve seat while repeatedly passing through the particle through hole of the lower plate, the orifice of the valve seat, and the particle through hole of the upper plate; And a hydraulic device connected to the lower plate and the upper plate to repeatedly transport the polishing means to the upper and lower particle through holes of the lower plate, the orifice of the valve seat, and the upper and lower particle through holes of the upper plate.

According to another aspect of the valve seat jig system of the solenoid valve for a brake system of the present invention, the upper plate has a mounting space formed at a bottom thereof, and an auxiliary plate is further provided to support the valve seat of the intermediate plate in the mounting space.

The valve seat jig system of the solenoid valve for the brake system of the present invention is characterized in that the hydraulic device is connected to the lower plate, and the polishing means includes a particle through hole of the upper plate, an orifice of the valve seat, and a particle particle through hole of the lower plate. A bottom piston for sequentially passing through the upper plate, and an upper piston connected to the upper plate to sequentially pass the particle through hole of the lower plate, the orifice of the valve seat, and the particle through hole of the upper plate, and the bottom piston. It is composed of a hydraulic pump connected to the upper piston and alternately supplying hydraulic pressure thereto.

Therefore, when a plurality of valve seats are mounted to the jig system of the present invention and the ultra fine particles are repeatedly passed through the jig system, the ultra fine particles polish the rough edges and chamfered surfaces while passing through the orifice of the valve seat, and thus the opening and closing of the valve seat contact The top corners and chamfers are precisely machined to ensure reliable control of the oil passing through the orifice.

Specific features and advantages of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings.

Figure 3 is a schematic separation perspective view showing a valve seat jig system of the solenoid valve for the brake system of the present invention, Figure 4 is a schematic coupling cross-sectional view of Figure 3, Figure 5 shows a state in which the upper edge and the chamfer surface of the valve seat is processed. As an excerpt sectional view, it is a lower plate 10, an intermediate plate 20, an upper plate 30, a fastening means 70 for joining them, and a valve seat 80 mounted on the intermediate plate 20 for polishing. The ultrafine particles 50, which are the means for polishing, and the hydraulic device 60 for operating the ultrafine particles 50 are largely divided.

The lower plate 10 has a central engaging hole 13 formed in the center thereof, and a plurality of particle through holes 11 are formed radially around the central engaging hole 13 so that ultrafine particles 50 to be described later pass through. It is. Screw holes 12 are formed at both sides of the lower plate 10 so that the side fastening bolts 71 to be described later are fastened thereto. As shown in FIG. 3, one screw hole 12 may be formed on each side of the lower plate 10, but a plurality of screw holes 12 may be formed radially. A lower plate handle 14 is provided around the lower plate 10, and a support leg 15 is formed below the lower plate 10.

The middle plate 20 has a central through hole 23 formed in the center thereof, and a plurality of valve seat engaging holes 21 are radially formed around the central through hole 23. The valve seat 80 shown in FIG. 5 is attached to the hole 21. The valve seat 80 is usually formed with an orifice 81 so that oil passes through the center, and a chamfer 83 is formed around the upper edge 82 of the orifice 81. The valve seat 80 is mounted in the valve seat coupling hole 21 of the intermediate plate 20, so that the edge 82 and the chamfer 83 are precisely polished by the ultra-fine particles 50 which will be described later. Here, the valve seat coupling holes 21 of the intermediate plate 20 are formed to coincide with the particle through holes 11 of the lower plate 10 when the intermediate plate 20 is seated on the lower plate 10. Side through holes 22 are formed at both sides of the intermediate plate 20 so as to face the screw holes 12 of the lower plate 10, and the intermediate plate handle 24 is formed at the periphery of the intermediate plate 20. have.

The top plate 30 has a central through hole 33 formed in the center thereof, and a plurality of particle through holes 31 are formed radially around the central through hole 33. Side engaging holes 32 are formed at both sides of the upper plate 30 so that the side fastening bolts 71 to be described later penetrate the side engaging holes 32 and the side through holes 22 of the intermediate plate, and then the lower plate ( It is fastened to the screw hole 12 of 10, and the upper plate handle 34 is provided around the upper plate 30.

A mounting space 35 is further formed on the bottom of the upper plate 30, and the auxiliary plate 40 is inserted into the mounting space 35. In this case, the auxiliary plate 40 is provided between the upper plate 30 and the intermediate plate 20 to serve to stably support the valve seat 80 mounted on the intermediate plate 20. A plurality of particle through holes 41 are formed to face the particle through holes 31 of 30.

The fastening means 70 is composed of the side fastening bolt 71, the central fastening bolt 72, the central fastening nut 73, the lower plate 10, the intermediate plate 20, the auxiliary plate 40, the upper plate 30 ) It is fastened to the circumference and the central part thereof and serves to fix them. That is, the side fastening bolt 71 passes through the side engaging hole 32 of the upper plate 30 and the side through hole 22 of the intermediate plate 20, and then is fastened to the screw hole 12 of the lower plate 10. The upper plate 30, the auxiliary plate 40, the intermediate plate 20, the lower plate 10 is combined. And the central fastening bolt 72 is inserted into the central through hole 33 of the upper plate 30, the central through hole 23 of the intermediate plate 20, and the central coupling hole 13 of the lower plate 10, and fastened them. Fix the central part of the jig in this way to improve the overall tightening force of the jig.

Although only one embodiment of such a fastening means 70 is shown and described, the present invention is not limited thereto, and the conventional knowledge is firmly coupled to the lower plate 10, the middle plate 20, and the upper plate 30. It will be possible to carry out various modifications within the scope of the present invention.

The ultrafine particles 50, which are grinding means, contact the opening and closing ball 90 of the valve seat 80 while repeatedly passing through the holes of the lower plate 10, the valve seat 80, the upper plate 30, and the auxiliary plate 40. Polish The ultrafine particles 50 may be made of any one of silicon carbide (SiC), borazon (CBN), alumina (Al203), and diamond (Diamond).

Silicon carbide is a pure, colorless transparent hexagonal plate crystal, having a melting point of 2,700 ° C. or more, subliming at 2,200 ° C., very hard, and having a hardness between ruby and diamond. Such silicon carbide is made by directly passing a current through a mixture of silica SiO2 and carbon such as pitch coke or petroleum coke, and then using the heat of resistance to stiffen it. Usually, silicon carbide is mainly used for abrasives, abrasive cloths, lapping agents, etc., and is used for special refractory chemical reaction vessels or resistance heating elements.

Borazone refers to an object having an equiaxed diamond structure by heating ordinary hexagonal boron nitride at 1,800 ° C and 85,000 atmospheres. Is 9.7, slightly less than 10 of diamonds. Boron nitride (BN) made by reacting nitrogen and boron is a kind of boride. It is also called cubic boron nitride (CBN) because it has a cubic crystal structure like diamond. The reaction of nitrogen with boron produces boron nitride, which, like carbon, has two allotropes that are chemically identical but physically different. One has a layered structure similar to graphite, the other a diamond-like cubic structure, the latter being borazone. Hardness is slightly lower than diamond, but diamond starts to oxidize in air at 600 ~ 700 ℃ and wears down. However, borazone has the advantage that it does not oxidize even at high temperatures of 1,370 ° C. and hardly wears because it does not react with iron. Therefore, it is used as a grinding and cutting tool for high temperature steel alloy such as carbon steel, high speed steel, and the like.

Alumina (Al203) is a compound of aluminum and oxygen, also called aluminum oxide. α-aluminum oxide is mainly a raw material for producing aluminum, and generally, crystals melted and precipitated have a hard solidity (Moss firmness 9), have a refractive index of 1.76 to 1.77, and are also used as artificial gemstones and abrasives. As crystals develop, they are less soluble in acids and alkalis, so they are sintered to form alumina porcelain.

Diamonds contain up to 0.2% nitrogen and up to 20 ppm aluminum as their main impurities in addition to carbon. In artificial crystals, nickel is contained as a mammal up to about 10%. It has a space group Fd 3m and a diamond crystal structure, and its lattice constant is a0 = 3.56688 ± 0.00009Å (25 ° C) and contains 8 carbon atoms in the unit grid. Its density is 3.51524 (g / cm3) (25 ° C) and its hardness is 10, making it the hardest material on earth. The thermal conductivity is as good as that of copper, and the thermal expansion coefficient is 1.5 to 4.8 × 10 −6 at 100 to 900 ° C., which is as small as invariant steel. It is not eroded by any acid and stable up to about 1,700 ° C in an inert gas.

The ultra-fine particles 50 are selected from the above-described silicon carbide, borazone, alumina, diamond according to the material of the workpiece and the particle size selection is the edge 82 R value of the valve seat 80 to be processed and the chamfered surface ( 83) is selected according to the surface roughness value.

The hydraulic device 60 is connected to the lower plate 10 and the upper plate 30 so that the ultrafine particles 50, which are grinding means, are disposed on the upper and lower portions of the lower plate 10, the valve seat 80, the auxiliary plate 40, and the upper plate 30. In repetitive direction. The hydraulic device 60 includes a bottom piston 61, an upper piston 62, and a hydraulic pump 63.

The bottom piston 61 is connected to the lower plate 10, and the ultrafine particles 50 penetrate the particle through-hole 31 of the upper plate 30, the orifice 81 of the valve seat 80, and the particle particles of the lower plate 10. Pass the holes 11 sequentially.

The upper piston 62 is connected to the upper plate 30, and the ultrafine particles 50 have the particle through hole 11 of the lower plate 10, the orifice 81 of the valve seat 80, and the particle through hole of the upper plate 30. Pass (31) sequentially.

The hydraulic pump 63 is connected to the bottom piston 61 and the upper piston 62 to alternately supply the hydraulic pressure.

In addition to the bottom piston 61, the upper piston 62, and the hydraulic pump 63 for supplying hydraulic pressure thereto, the hydraulic device 60 includes a pressure regulating valve and a solenoid valve (Solenoid). valves, etc. will be further included.

6 is a flowchart showing a valve seat processing method of the solenoid valve for a brake system according to the present invention in sequence, and the valve seat processing method will be described with reference to the following.

First, a lower plate 10 having a plurality of particle through holes 11 formed therein, and a plurality of valve seat coupling holes 21 formed on the lower plate 10 and facing the particle through holes 11 are formed. An intermediate plate 20 to which the valve seat 80 is coupled to the hole 21, and an upper plate having particle through-holes 31 formed on the intermediate plate 20 and facing the valve seat coupling holes 21. 30 and a jig preparing step S10 for preparing the auxiliary plate 40 mounted in the mounting space 35 of the upper plate 30 and having a plurality of particle through holes 41 formed therein.

The lower plate 10 of the jig prepared through the jig preparation step (S10) is provided with a support leg 15 to support the entire jig, provided in the lower plate 10, the intermediate plate 20, the upper plate 30, respectively It is easy to carry them by the lower plate handle 14, the middle plate handle 24, the upper plate handle 34.

Also, the particle through holes 11 of the lower plate 10, the valve seat coupling holes 21 of the intermediate plate 20, the particle through holes 41 of the auxiliary plate 40, and the particle through holes of the upper plate 30. The 31 are formed so that the centers of the holes coincide with each other when the lower plate 10, the intermediate plate 20, the auxiliary plate 40, the upper plate 30 are sequentially stacked and assembled, and thus the ultrafine particles 50 are While passing through them, the processing of the valve seat 80 does not interfere with the transfer of the ultrafine particles 50.

The lower plate 10, the intermediate plate 20, the upper plate 30, and the auxiliary plate 40 prepared as described above are provided with a plurality of holes to fasten the fastening means 70 of the present invention. That is, the lower plate 10 is formed with screw holes 12 and the center engaging hole 13 on both sides, and the intermediate plate 20 has side through holes 22 and the center through hole 23 formed thereon. The side engaging hole 32 and the central through hole 33 are formed in the 30, and the central through holes 42 are formed in the auxiliary plate 40. The fastening means 70 is fastened to the holes of the lower plate 10, the intermediate plate 20, the upper plate 30, and the auxiliary plate 40 in the jig assembly step S40 which will be described later.

When the lower plate 10, the intermediate plate 20, the upper plate 30, and the auxiliary plate 40 are prepared in the above-described jig preparation step S10, the valve seat 80 in contact with the opening and closing ball 90 is polished. There is an ultra-fine particle preparation step (S20) to prepare the ultra-fine particle 50 to.

The ultrafine particles 50 for polishing the valve seat 80 at the contact portion of the opening / closing ball 90 are prepared through the ultrafine particle preparation step (S20), which is a grinding means. The ultrafine particles 50 may be made of any one of silicon carbide, borazone, alumina and diamond, and the particle size of the edge 82 of the valve seat 80 and the chamfered surface 83 of the valve seat 80 to be processed. It can be selected according to the surface roughness value.

When the jig and the ultrafine particles are prepared, there is a valve seat mounting step S30 for mounting the valve seat 80 to the valve seat coupling holes 21 of the intermediate plate 20, respectively.

When the valve seat 80 is mounted to the valve seat coupling holes 21 of the intermediate plate 20 through the valve seat mounting step S30, the upper plate 30 and the lower plate 10 are mounted on the intermediate plate 20. Each assembly has a jig assembly step (S40).

In this jig assembly step (S40), first, the intermediate plate 20 on which the valve seat 80 is mounted is placed on the lower plate 10, and the upper plate 30 is cut off on the intermediate plate 20. At this time, the auxiliary plate 40 is inserted into the mounting space 35 of the upper plate 30. After stacking the lower plate 10, the intermediate plate 20, the auxiliary plate 40, and the upper plate 30 in this manner, the screw hole 12 to which the fastening means 70 is to be fastened, the side through hole 22, and the side coupling hole The 32 and the center engaging hole 13 and the center through hole 23, 33 and 42 coincide with each other. In this way, the particle through holes 11, 41, 31 of the lower plate 10, the auxiliary plate 40, and the upper plate 30, through which the ultrafine particles 50 pass, and the orifice 81 of the valve seat 80 are formed. ) Is matched.

When the lower plate 10, the intermediate plate 20, and the upper plate 30 are temporarily assembled, the fastening means 70 is fastened thereto. First, the side fastening bolts 71 are inserted into the side engaging holes 32 of the upper plate 30 and the side through holes 22 of the intermediate plate 20, and then fastened to the screw holes 12 of the lower plate 10. The circumference of the upper plate 30, the intermediate plate 20, and the lower plate 10 is fixed. The center fastening bolt 72 and the center fastening nut 73 are inserted into the central through holes 33 and 23 of the upper plate 30 and the intermediate plate 20, and the central engaging hole 13 of the lower plate 10. After fastening them, the lower plate 10, the middle plate 20, and the central portions of the upper plate 30 are fixed to each other.

As such, when the lower plate 10, the intermediate plate 20, the auxiliary plate 40, and the upper plate 30 are assembled, the bottom piston 61 is connected to the lower plate 10, and the particle through hole 31 of the upper plate 30 is formed. After inserting the ultrafine particle 50 into the orifice 81 of the valve seat 80 and the particle through hole 11 of the lower plate 10, the ultrafine particle 50 is introduced by connecting the upper piston 62 to the upper plate 30. Seal the inside of the holes.

The bottom piston 61 connected to the bottom plate 10 is connected to the bottom surface of the bottom plate 10 so as to surround the entire particle through hole 11 formed in the bottom plate 10, and when the bottom piston 61 is operated, As a result, the ultrafine particles 50 pass through the particle through hole 11 of the lower plate 10, the orifice 81 of the valve seat 80, and the particle through hole 31 of the upper plate 30 to be pumped toward the upper piston 62. do.

The upper piston 62 connected to the upper plate 30 is connected to the upper surface of the upper plate 30 so as to surround the entire particle through hole 31 formed in the upper plate 30, and when the upper piston 62 is operated, As a result, the ultrafine particles 50 pass through the particle through hole 31 of the upper plate 30, the orifice 81 of the valve seat 80, and the particle through hole 11 of the lower plate 10 to be pumped toward the bottom piston 61. do.

When the lower plate 10, the intermediate plate 20, the auxiliary plate 40 and the upper plate 30 are assembled in this way, and the bottom piston 61 and the upper piston 62 are installed on the lower plate 10 and the upper plate 30, Valve seat processing step (S50) for processing the contact area of the opening and closing ball 90 of the valve seat 80 by repeatedly passing the ultrafine particles 50 through the holes of the lower plate 10, valve seat 80, the upper plate 30 (S50) )

In the valve seat processing step S50, the bottom piston 61 and the upper piston 62 are sequentially pumped by the hydraulic pump 63. Accordingly, the particle through hole 11 of the lower plate 10 and the valve seat ( The ultra-fine particles 50 are repeatedly passed through the orifice 81 of the 80 and the particle through-holes 31 of the upper plate 30 to process the contact area of the opening and closing ball 90 of the valve seat 80.

Here, the ultrafine particles 50 passing through the lower plate 10, the orifice 81 of the valve seat 80, the auxiliary plate 40, and the upper plate 30 are pumped at a pressure of 700 to 1200 psi, and the pumping operation is 2 to 6. It is performed repeatedly for minutes.

Under the above conditions, while the ultrafine particles 50 pass through the orifice 81 of the valve seat 80, the valve seat 80 made of stainless steel has a chamfered surface 83 and a corner 82 at the top of the orifice 81. It is processed precisely, the edge 82 portion of the upper end of the orifice 81 is machined within the range of R 0.1 to 0.5 mm, and the surface roughness of the chamfered surface 83 of the upper end of the orifice 81 is Rz 0.1 to 0.5 micron. Machined to maintain.

As such, the contact portion of the opening / closing ball 90 of the valve seat precisely processed greatly contributes to improving the quality of the solenoid valve of the present invention. The opening and closing ball 90 of the valve seat 80 is operated by the solenoid valve. When it comes in contact with the upper edge 82 or the chamfer 83, the degree of adhesion is improved, and eventually the oil passing through the orifice 81 can be reliably interrupted.

When the processing of the valve seat 80 is completed through the valve seat processing step S50, the valve seat 80 is removed from the intermediate plate 20 by separating the lower plate 10, the intermediate plate 20, and the upper plate 30. It has a valve seat separation step (S60) to separate.

In the present invention as described above, when a plurality of valve seats are mounted in the jig system and the ultra fine particles are repeatedly passed through the jig system, the ultra fine particles polish the rough edges and the chamfered surface while passing through the orifice of the valve seat, and thus the opening and closing ball contacts. The top edge and chamfered surface of the valve seat are precisely machined to ensure reliable control of the oil passing through the orifice.

Claims (15)

A lower plate 10 having a plurality of particle through holes 11 formed therein, and a plurality of valve seat coupling holes 21 formed on the lower plate 10 and facing the particle through holes 11 are formed. The intermediate plate 20 to which the valve seat 80 is coupled to the coupling hole 21 and the particle through holes 31 seated on the intermediate plate 20 and opposed to the valve seat coupling holes 21 are provided. Jig preparation step (S10) for preparing the formed top plate 30; An ultrafine particle preparation step (S20) of preparing an ultrafine particle 50 for polishing the valve seat 80 in contact with the opening / closing ball 90; A valve seat mounting step (S30) for mounting the valve seat (80) to the valve seat coupling holes (21) of the intermediate plate (20), respectively; Jig assembly step (S40) for assembling the upper plate 30 and the lower plate 10 to the intermediate plate 20, respectively; Valve seat processing for processing the contact area of the opening and closing ball 90 of the valve seat 80 by repeatedly passing the ultra-fine particles 50 through the holes of the lower plate 10, valve seat 80, upper plate 30. Step S50; When the processing of the valve seat 80 is completed, the valve seat separation step of separating the valve seat 80 from the intermediate plate 20 by separating the lower plate 10, the intermediate plate 20, the upper plate 30 ( S60); valve seat processing method of the solenoid valve for a brake system, characterized in that consisting of. According to claim 1, In the ultrafine particle preparation step (S20), The ultra-fine particles 50 is a valve seat processing method of a solenoid valve for a brake system, characterized in that consisting of silicon carbide. According to claim 1, In the ultrafine particle preparation step (S20), The ultra-fine particles (50) is a valve seat processing method of a solenoid valve for a brake system, characterized in that consisting of a bora zone. According to claim 1, In the ultrafine particle preparation step (S20), The ultra-fine particles 50 is a valve seat processing method of a solenoid valve for a brake system, characterized in that consisting of alumina. According to claim 1, In the ultrafine particle preparation step (S20), The ultra-fine particles 50 is a valve seat processing method of a solenoid valve for a brake system, characterized in that made of diamond. According to claim 1, In the jig assembly step (S40), The screw hole 12 of the lower plate 10 and the side through hole 22 of the intermediate plate 20 coincide with the side engaging hole 32 of the upper plate 30, and the side fastening bolt 71 is coupled thereto. By fixing the lower plate 10, the middle plate 20, the upper plate 30, The center fastening bolt 72 and the center fastening nut in the center engaging hole 13 of the lower plate 10, the central through hole 23 of the intermediate plate 20, and the central through hole 33 of the upper plate 30. A valve seat processing method for a solenoid valve for a brake system, characterized by reinforcing assembly of the lower plate (10), the intermediate plate (20), and the upper plate (30) by tightening (73). According to claim 1, In the valve seat processing step (S50), The pumping pressure of the ultra-fine particles (50) passing through the holes of the jig is 700 ~ 1200psi valve seat processing method for a solenoid valve for a brake system, characterized in that. The method according to claim 1 or 7, wherein in the valve seat processing step (S50), The processing time of the valve seat (80) is a valve seat processing method of a solenoid valve for a brake system, characterized in that the vertical movement of the ultra-fine particles (50) is performed for 2 to 6 minutes. According to claim 8, In the valve seat processing step (S50), The valve seat 80 is a valve seat processing method of a solenoid valve for a brake system, characterized in that made of stainless material. The method of claim 9, wherein in the valve seat processing step (S50), The contact area of the opening / closing ball 90 of the valve seat 80 maintains R 0.1 to 0.5 mm at the corner 82 at the top of the orifice 81 and the surface roughness of the chamfered surface 83 at the top of the orifice is Rz 0.1 to A valve seat processing method for a solenoid valve for a brake system, which is processed to maintain 0.5 micron. A lower plate 10 on which a plurality of particle through holes 11 are formed; A plurality of valve seat coupling holes 21 are formed on the lower plate 10 to face the particle through hole 11, and the valve seat 80 is coupled to the valve seat coupling hole 21. Plate 20; An upper plate 30 seated on the intermediate plate 20 and having particle through-holes 31 formed to face the valve seat coupling holes 21; Fastening means (70) fastened to the lower plate (10), the intermediate plate (20), and the upper plate (30); Opening and closing balls of the valve seat 80 while repeatedly passing through the particle through hole 11 of the lower plate 10, the orifice 81 of the valve seat 80, and the particle through hole 31 of the upper plate 30. 90) polishing means for polishing the contact portion; The grinding means is connected to the lower plate 10 and the upper plate 30 so that the grinding means includes the particle through hole 11 of the lower plate 10, the orifice 81 of the valve seat 80, and the particle through hole of the upper plate 30. 31) The valve seat jig system of the solenoid valve for the brake system, characterized in that consisting of; hydraulic device for repeatedly transporting up and down. The method of claim 11, wherein the top plate 30, A mounting space 35 is formed at the bottom thereof, and the auxiliary space 40 is further provided to support the valve seat 80 of the intermediate plate 20 in the mounting space 35. Valve seat jig system for solenoid valves. The method of claim 11, wherein the fastening means 70, A side fastening bolt 71 coupled to the screw hole 12 of the lower plate 10 and the side through hole 22 of the intermediate plate 20 and the side engaging hole 32 of the upper plate 30 to fix them; The lower plate 10 and the intermediate plate are coupled to the central coupling hole 13 of the lower plate 10, the central through hole 23 of the intermediate plate 20, and the central through hole 33 of the upper plate 30. (20), a valve seat jig system for a solenoid valve for a brake system, characterized in that it consists of a central fastening bolt (72) and a central fastening nut (73) to reinforce the assembly of the upper plate (30). The method of claim 11, wherein the polishing means, Valve seat jig system of a solenoid valve for a brake system, characterized in that made of ultrafine particles (50) of any one of silicon carbide, borazone, alumina, diamond. 15. The method of claim 11 or 14, wherein the hydraulic device 60, It is connected to the lower plate 10 and the polishing means sequentially through the particle through hole 31 of the upper plate 30, the orifice 81 of the valve seat 80, the particle through hole 11 of the lower plate 10 in sequence. Bottom piston 61 to pass through, It is connected to the upper plate 30 and the grinding means sequentially through the particle through hole 11 of the lower plate 10, the orifice 81 of the valve seat 80, the particle through hole 31 of the upper plate 30 in sequence. An upper piston 62 to pass through, A valve seat jig system for a solenoid valve for a brake system, comprising a hydraulic pump (63) connected to the bottom piston (61) and the upper piston (62) to alternately supply hydraulic pressure thereto.

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