KR20040099867A - A compound carbon forming method for synchronizer ring - Google Patents

Abstract

PURPOSE: A compound carbon forming method for a synchronizer ring is provided to easily manufacture a ring-shaped thin compound carbon by executing a preforming process before thermoforming compound carbon powder. CONSTITUTION: A compound carbon forming method for a synchronizer ring comprises the steps of: injecting compound carbon powder(5) containing an inorganic compound into a mold; applying pressure to the injected compound carbon powder to preform a ring-shaped thin compound carbon; separating the solidified compound carbon from the mold; and inserting the separated compound carbon into a thermoforming mold. The mold includes a central mold(1) at the center, fixed molds(2) installed away from the central mold, a centering mold(3) at the lower part, and punches(4) for applying pressure to the compound carbon.

Description

Composite carbon molding method for synchronizer ring {A COMPOUND CARBON FORMING METHOD FOR SYNCHRONIZER RING}

The present invention relates to a composite carbon molding method for a synchronizer ring, and more particularly, molding for easily forming a composite carbon used for enhancing abrasion resistance and friction in a synchronizer ring applied to a vehicle transmission. It is about a method.

Generally, the gear biting method of the manual transmission for a vehicle includes a perturbation gear type, a constant biting type, and a synchronous biting type. Recently, a manual transmission has a synchronous bite type designed to compensate for the disadvantages of the perturbation type and the constant biting type. It is adopted mainly.

In the above-described synchronous rim, the synchronizer hub is splined on the main shaft to rotate integrally with the main shaft, and the sleeve is engaged with the gear part of the outer peripheral surface of the synchronizer hub to move in the axial direction.

A speed gear coupled to a clutch gear selectively engaged with the sleeve is disposed at both sides of the synchronizer hub, and a cone ring formed inside the clutch gear has a synchronizer ring for synchronizing. Is arranged.

Such a synchronizer ring is one of the most important parts of a transmission that makes rotational bodies of different speeds at the same speed in a short time by using friction. High strength brass has been used to meet the requirements.

On the other hand, in recent years, it has been concluded that a composite carbon having a high coefficient of friction and excellent durability is the most suitable for high durability and high performance synchronizer for the high horsepower and shift feeling of the engine and the automatic shift.

However, composite carbon is difficult to be formed and manufactured due to the characteristics of the material. Therefore, after the friction material is first formed into a thick thickness, it is necessary to perform post-processing by secondary machining to reduce the thickness. There was a problem of price increase.

The present invention has been proposed to improve the above-mentioned conventional problems, and by presenting a new molding method for performing pseudoforming in the form of a ring before the thermoforming process of a composite carbon, which is a kind of thermosetting resin having excellent durability and friction coefficient. The aim is to reduce raw materials and processing costs, and to significantly increase the life of processing tools.

Figure 1 is a cross-sectional structural view of the mold for composite carbon pseudo-molding of the present invention.

Figure 2 is a composite carbon shape taken out from the mold by the pseudo-molded.

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

1: center frame 2: fixed frame

3: centering die 4: punch

5: composite carbon powder 6: caustic composite carbon

The object is to inject the composite carbon powder to which the inorganic compound is added into the mold, to apply the pressure to the injected composite carbon material, to form the composite carbon in the form of a thin ring, and to take out the solidified caustic composite carbon to be the next step. It can be achieved through the composite carbon molding method for a synchronizer ring, characterized in that the insert for inserting into the mold for the thermoforming process.

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

Composite carbon is a kind of thermosetting resin that is solidified when high heat is applied to the product to exhibit the characteristics of the product. Conventionally, it was not possible to inject a thin sheet into the present invention. Let us look at the structure of the mold shown in.

In other words, the mold structure for forming the composite carbon into a thin thin plate shape has a central mold (1) is formed in the center of the body, the fixed mold (2) spaced at regular intervals around the center, and the centering is located below The mold 3 and the punch 4 for pressurizing are comprised in ring shape, respectively.

At this time, the opposite surface between the center mold (1) and the stationary mold (2) forms a tapered shape, thereby forming a structure in which the separation width gradually decreases downward.

Looking at the process of forming a composite carbon using a mold forming such a structure as follows.

First, a predetermined amount of composite carbon powder 5 having an inorganic compound blended together at a predetermined ratio is introduced into the space between the center mold 1 and the stationary mold 2 to facilitate molding of the carbon powder.

When the punch 4 is pressed downwardly using a press, the composite carbon powder 5 injected into the mold receives the pressing force by the punch 4 while minimizing voids between the particles, thereby making a close ring. Composite carbon is formed in the form.

Then, when the punch 4 is raised to its original position and the pseudo composite carbon is taken out from the mold, as shown in FIG. 2, the pseudo composite composite carbon 6 having a ring shape in which powder materials are agglomerated by pressure is removed. You can get it.

Therefore, the composite carbon 6 molded in this way is easily inserted into the thermoforming mold, which is the next process, and is molded while being able to receive a constant temperature and pressure in the thermoforming mold. As the fiber structure is strengthened with a high density, it can be seen that a thin thin composite carbon composite having a high coefficient of friction and good durability can be easily manufactured.

In addition, although specific embodiments of the present invention have been described and illustrated above, it is obvious that the composite carbon molding method of the present invention may be variously modified and implemented by those skilled in the art.

For example, in the drawings attached to the above embodiment, a mold having a specific shape for caustic molding of a composite carbon is presented, but the shape and structure of the mold can be manufactured in various forms.

Therefore, such modified embodiments should not be understood individually from the technical spirit or the prospect of the present invention, and such modified embodiments should fall within the appended claims of the present invention.

As described above, the composite carbon molding method for the synchronizer ring according to the present invention can be easily molded and manufactured in a thin plate form of a composite carbon, which is difficult to form, through a process improvement to first perform a temporary molding process before the material is thermoformed. It is a useful invention that can significantly reduce the raw materials and processing costs, and significantly increase the life of the machining tool.

Claims (2)

The composite carbon powder to which the inorganic compound is added is introduced into the mold, and pressure is applied to the injected composite carbon material to form the composite carbon in the form of a thin ring, and the solidified caustic composite carbon is taken out to carry out the thermoforming process. Composite carbon molding method for a synchronizer ring, characterized in that inserted into the mold for. The method according to claim 1, The mold for calibrating the composite carbon has a center mold (1) is formed in the center of the body, the fixed mold (2) spaced apart at regular intervals around the centering mold (3), And a punch (4) for pressurizing each of the composite carbon molding method for a synchronizer, characterized in that provided in a ring shape.