KR100732245B1 - Solenoid valve core for vehicle and manufacturing method thereof - Google Patents

Abstract

A solenoid valve core for vehicle which can increase productivity of the product by manufacturing a cup part and a nipple part for manufacturing the solenoid valve core for vehicle, and assembling the manufactured cup part and nipple part, thereby manufacturing a product, and a manufacturing method thereof are provided. A manufacturing method of a solenoid valve core for vehicle comprises: a cup part forming process of forming the plate-like workpiece into a core cup shape(C) by bending the through hole-formed plate-like workpiece after pressing a plate-like workpiece(100) with predetermine diameter and length, thereby perforating a through hole(110) into a central part of the plate-like workpiece; a core nipple part forming process of inserting a workpiece(200) with predetermine diameter and length into a dies that performs a mold function, pressing the workpiece by a punch, thereby subjecting the workpiece to plastic deformation to form an inserting part(230) that is to be inserted into the through hole of the cup part, and punching the inserting part using a piercing punch to form a core nipple part(N) in which a through hole(220) is formed in the inserting part; a bonding process of inserting the inserting part of the nipple part into the through hole of the core cup part, and bonding the inserting part of the nipple part to the through hole of the core cup part to integrally connect the inserting part of the nipple part to the through hole of the core cup part.

Description

Solenoid valve core for automobile and manufacturing method thereof {SOLENOID VALVE CORE FOR VEHICLE AND MANUFACTURING METHOD THEREOF}

1 is a cross-sectional view for explaining a cup forming process in the method of manufacturing a solenoid valve core for an automobile according to the present invention.

Figure 2 is a cross-sectional view for explaining the molding process of the nipple in the method of manufacturing a solenoid valve core for automobiles according to the present invention.

Figure 3 is a cross-sectional view showing a cup and nipple respectively assembled by the method of manufacturing a solenoid valve core for automobiles according to the present invention according to the present invention.

The present invention relates to a solenoid valve core for an automobile and a method of manufacturing the same, and more particularly, to a solenoid for an automobile which can be manufactured in a simple process by forming a cup and a nipple constituting the core, and then assembling them by a bonding method. A valve core and a method of manufacturing the same.

In general, the solenoid valve is a device configured to open and close the flow path by converting the entrance and exit between the cylinder and the plunger by transmitting the physical force in a certain direction by using the principle of the electromagnet. It is very widely used in industry.

Solenoid valves that perform these functions are mainly used to control the flow of fluid in a vehicle, and in particular, to control the hydraulic pressure of the automatic transmission of the vehicle. In addition, in the case of an electric vehicle using a fuel cell as an energy source, it is widely used to control fluid flow such as hydrogen, air, and water.

In this way, the solenoid valve for controlling the flow of the fluid is normally such that the plunger is in close contact with the partition wall by the elastic force of the restoring spring to block the fluid inlet hole to close the passage of the fluid.

That is, since the elastic force of the restoring spring is usually larger than the flow force of the fluid, the plunger blocks the flow of the fluid while being in close contact with the partition wall.

When the fluid is introduced, when electricity is applied to the coil, the plunger is moved by the magnetic force and at the same time, the inlet hole is opened to introduce the fluid through the fluid inlet hole of the partition wall and the hollow of the plunger.

That is, when electricity is applied to the coil, a magnetic field is formed therein, and the magnetic field provides a suction force so that the plunger is separated from the partition wall. As the plunger moves, the fluid inlet hole of the partition is opened, and the fluid is introduced through the hollow of the plunger due to the pressure difference.

At this time, since both ends of the restoring spring are connected to the plunger and the partition wall, the restoring spring is extended by the movement of the plunger, and the restoring force of the restoring spring acts as a restoring force to bring the plunger into close contact with the partition of the original position after the magnetic field is removed. .

The solenoid valve is provided with a core for electromagnetic operation. A coil is installed inside the core, and when power is supplied to the coil, the plunger located inside the core moves to interrupt the flow of fluid. Done.

Such a solenoid valve core is molded by forging and multi-step molding process. Looking at the processing process of the solenoid valve core, first, a cutting process of cutting raw materials to a required length,

A primary plastic deformation process of plastic deformation by pressing with a punch to smooth the plane of the material cut surface irregularly formed by the cutting process;

A secondary plastic deformation process of plastically deforming by pressing with a punch such that the left and right shapes of the material which have undergone the first plastic deformation process are the same;

An annealing process for reducing the strength by annealing (annealing) the material subjected to the secondary plastic deformation process to facilitate forging work, and

Short process for removing the scale generated on the surface of the material subjected to the annealing process,

After coating the zinc-based phosphate film in order to reduce the surface friction coefficient of the material subjected to the short process to facilitate forging, and a coating process of applying a lubricant to the surface of the material,

A hole forming step of forming a hole by punching the material subjected to the coating process into a die of a cold multi-stage molding machine;

A punching process of completing the inner diameter shape by punching the material that has undergone the hole forming process by a piercing punch of a cold multi-stage molding machine;

The punched material is passed through the piercing pin of the cold multi-stage molding machine to obtain a through hole, and then, it is composed of several steps such as a through step of completing the core.

Looking at the manufacturing process of the solenoid valve core according to the prior art, the cutting process for cutting the coil material, the primary molding process, the secondary molding process, the annealing process, the short process, the coating process, the molding process for forming the cut blank material The work is divided into many process steps such as, and the core made of the cup part and the nipple part is manufactured in one piece through the above process, which takes a long time and work time, which is why it is a factor of lowering productivity and cost. .

In addition, the lubrication process to facilitate the processing of the material is also an important process that prevents mold breakage, dimensional defects, and forgings by minimizing the pressure force generated during molding by reducing the surface friction coefficient of the blank. The treatment process includes preliminary degreasing step, main degreasing step, first washing step, pickling step (sulfuric acid + hydrochloric acid 1: 1), second washing step, third washing step, coating (zinc-based) step, coating first washing step, The film is composed of many processes such as secondary washing step, neutralization step, lubrication step, and drying step, resulting in poor workability and environmental pollution.

In addition, in the prior art, in order to work with an excessive strain when forming a blank material, annealing is performed by a heat treatment step in which the tensile strength of the material is weakened by heat treatment conditions such as heating, cooling, and air cooling processes of various stages to increase toughness. As a result, the work process and working time are delayed, resulting in inefficient productivity.

The present invention has been made in order to solve the conventional problems as described above, an object of the present invention after manufacturing the cup portion and the nipple portion constituting the solenoid valve core for automobiles, and then assembled it to increase the productivity of the product The present invention provides a solenoid valve core for automobiles and a method of manufacturing the same.

The solenoid valve core manufacturing method for automobiles proposed by the present invention is

A cup part forming process of pressing a plate-shaped material having a predetermined diameter and length to punch a through hole in a center portion thereof, and then bending the sheet to form a cup shape for a core;

Insert a material having a predetermined diameter and length into a die serving as a mold and press with a punch to plastically deform and insert an insert to be inserted into a through hole of a cup part, and a hole inside the insert by punching by a piercing punch. Forming a nipple portion for the core through the core;

A joining step of inserting and inserting the nipple part into the through-holes of the core cup part formed by the above process and joining them together;

It provides a method for manufacturing a solenoid valve core for an automobile comprising a.

The bonding process may be any one of the method of melting and bonding a polymer type such as melting of the base material itself, brazing, plastic.

In another aspect, the present invention provides a solenoid valve core, which is provided in a motor vehicle, in which a bobbin in which a coil is wound is assembled to control a flow of a fluid by electromagnetic operation.

The core consists of a cup portion and a nipple portion, and the cup portion and the nipple portion provide an automobile solenoid valve core assembled with a bonding agent.

The said bonding agent consists of any one of a melting part, a welding part, a Cu layer, and a polymer layer.

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

1 is a view showing a process manufactured in the cup to explain the method for manufacturing a solenoid valve core for automobiles according to the present invention, Figure 2 is assembled to a cup to explain the manufacturing method for a solenoid valve core for automobiles according to the present invention As a diagram showing a process of manufacturing a nipple, first, as shown in FIG. 1A, a cutting process of cutting raw materials by a press is performed to prepare a material 100 for forming a cup.

The cutting of the material 100 proceeds after determining the cutting length in advance by accurately calculating the height and volume of the cup to be manufactured.

When the material 100 is provided as described above, it is pressurized with a press or the like to reduce the outer diameter portion to a predetermined thickness as shown in FIG. 1B and to drill the through hole 110.

After the process is completed, as shown in FIG. 1C, the plate-shaped material 100 having the through hole 110 is pressurized and molded into a cup shape having an interior portion 120, and then the side surface of the cup shape is illustrated in FIG. 1D. Molding the groove 130 by notching so as to facilitate the insertion of parts therein as in the molding of the cup (C) is completed.

The processes of FIGS. 1C and 1D, that is, the bending process and the notching process may be unified in one process.

Meanwhile, the nipple provided to the solenoid valve core of the present invention can be molded separately through the process of FIG. 2. To this end, the cutting knife is operated while supplying raw materials through a rolling supply such as a forma not shown. By cutting the material 200 of a certain length.

During the cutting process, the cut material 200 proceeds after the cutting length is determined in advance by accurately calculating the length and volume of the nipple to be manufactured and the ratio compressed by the action of the punch part.

And the punching step of completing the shape of the inner space 210 by punching the material 200 by the piercing punch of the cold multi-stage molding machine, and cold-rolled the material 200 having the inner space 210 through the punching step 2B through the step of forming the through-hole 220 and the insertion portion 230 by penetrating using the piercing pin of the multi-stage molding machine, and forming the groove 240 in the lower portion of the material 200 by plastic deformation. It is possible to produce a nipple (N) for the core, such as the processing method can be molded by a general forging molding, so a detailed description thereof will be omitted.

The grooves 240 formed in the nipples N may take various forms in order to facilitate bonding by insertion and melting of the bonding agent in the brazing process described later.

The core cup C and the nipple N processed as described above may be subjected to heat treatment (annealing, annealing) according to the properties of the material.

A feature of the present invention is configured to produce a solenoid valve core by assembling the cup C and the nipple N for cores.

For this assembly, as shown in FIG. 3, the adhesive 300 is inserted into the groove 240 of the nipple N, and then the insertion portion 230 of the nipple N is inserted into the through hole 110 of the cup C of the core. Insert).

The binder 300 may be made of copper (Cu), a polymer material such as plastic, and the like, and when heat is applied to the binder 300 in this state, the binder 300 is melted and the nipple (N) and the cup ( C) is bonded and integrally connected to complete the manufacture of the solenoid belt core for automobiles.

The brazing used in such a process may not be described in detail because conventional methods may be used.

In addition to the brazing process, the cup (C) and the nipple (N) can also be connected by welding or melting the material itself. In addition, any method can be used if the metal and the metal are kept tight and connected to each other. have.

By such a simple process, the core of the solenoid valve for a vehicle can be easily manufactured, and can be installed and used as a means for controlling hydraulic pressure in an automatic transmission of a vehicle.

As described above, the solenoid valve core for automobiles according to the present invention can be manufactured in a simple process by forming cups and nipples, and then joining them with welding, melting, and bonding agents, thereby improving product productivity. .

In addition, the present invention does not need a lubrication treatment process can lower the environmental pollution and process costs, and can reduce the work process and working time is not necessary because the annealing process by the heat treatment process.

Claims (6)

A cup part forming process of pressing a plate-shaped material having a predetermined diameter and length to punch a through hole in a center portion thereof, and then bending the sheet to form a cup shape for a core; Insert a material having a predetermined diameter and length into a die serving as a mold and press with a punch to plastically deform and insert an insert to be inserted into a through hole of a cup part, and a hole inside the insert by punching by a piercing punch. Forming a nipple portion for the core through the core; A joining step of inserting and inserting the nipple part into the through-holes of the core cup part formed by the above process and joining them together; Automotive solenoid valve core manufacturing method comprising a. The method of manufacturing a solenoid valve core for an automobile according to claim 1, wherein the joining process uses any one of welding, melting of the base metal, brazing, and bonding. The method of manufacturing a solenoid valve core for an automobile according to claim 1, wherein a heat treatment process is further performed before the bonding process to further improve the hardness of the molded core cup portion and the nipple portion. delete delete delete

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