KR100451867B1 - Ferrule manufacturing process and device - Google Patents

Abstract

The present invention relates to a method and apparatus for manufacturing a ferrule material for producing a ferrule material for connecting a rubber hose and a metal pipe having different diameters using a conventional metal pipe. A cutting step of cutting the length of the ferrule material 1 to be produced to obtain the raw material 1a; The raw material (1a) obtained in the cutting process is placed on the lower fixed mold (5a) of the primary molding apparatus and pressed into the upper movable mold (5b) to process the upper end portion of the raw material (1a) into a hemispherical shape. A primary molding step of obtaining a primary molded material 1b having an upper end processed into a hemispherical shape; The primary molding material 1b having undergone the primary molding process is pressed into the upper movable mold 6b while being fixed to the support protrusion 61 of the lower stationary mold 6a of the secondary molding apparatus. Secondary molding which obtains the secondary molded material 1c in which the upper end portion of the molded material 1b is flat and the center portion is compressed to form a cross-sectional shape, and the upper portion is flat and the center portion is conical. Process; The secondary molding material 1c, which has undergone the secondary molding process, is fixed to the support protrusion 71 of the lower fixing mold 7a of the tertiary molding apparatus and is fixed to the flat pressing surface of the upper movable mold 7b. A tertiary molding step of pressing the upper end of the primary molded material 1c to obtain a tertiary molded material 1d having a flat upper end; Punching projections 84 of the upper movable mold 8b in a state in which the tertiary molding material 1d that has undergone the tertiary molding process is fixed to the support protrusions 81 of the lower fixed mold 8a of the fourth molding apparatus. The fourth aspect of the invention is characterized in that the fourth molding process for forming the ferrule material 1 is performed in stages by punching a furnace to drill a hole having a predetermined diameter in the center of the upper end portion of the third molding material 1d.

Description

Ferrule material manufacturing method and device

The present invention relates to a method and apparatus for manufacturing a ferrule material, which enables a ferrule material for connecting a rubber hose and a metal pipe having different diameters to be manufactured using a conventional metal pipe.

In general, a car cooler system is composed of components such as a compressor, a dryer, an expansion valve, and an condenser, and these components include refrigerant from liquid to gas and gas. It is configured to perform the cooling operation while repeating the operation of supplying and recovering through the high pressure line or the low pressure line while continuously converting the liquid into the liquid.

The high pressure line or the low pressure line for circulating the high pressure and low pressure refrigerant in the car cooler system must be able to withstand the high pressure and be installed between various components mounted in the engine room in a narrow space of the engine room. Therefore, it is a structure that connects the rubber hose which is easy to bend and the metal pipe made of aluminum material at the proper position, and is used to prevent leakage of refrigerant while reinforcing the connection of the rubber hose and the metal pipe. ) Is used.

That is, the closed rule 10 used in the high pressure line or the low pressure line of the car cooler system is as shown in Figure 6 of the large diameter cylindrical portion 11 and the rubber hose 20 surrounding the outer circumference of the rubber hose (20) It is composed of a ferrule material having a small diameter portion 12 is formed to allow the insertion of the metal pipe 30 while covering the end, the ferrule 10 is the rubber hose 30 of the metal pipe 30 is inserted The large diameter cylindrical portion 11 of the ferrule material surrounding the outer circumference of the connecting portion is press-molded with a pressure molding apparatus (not shown) to form a plurality of pressure ring portions 13 for tightening the outer circumference of the rubber hose 20. It is composed of a structure that improves airtightness and durability while strengthening the coupling force of the pipe 30 and the rubber hose (20).

In order to manufacture a conventional ferrule material, as shown in FIG.

That is, the cutting process (see Fig. 7 (A)) to obtain a round bar material 100 by cutting the full metal round bar to a certain length, and the forging process of the round bar material 100 obtained in the cutting process, one end is opened and the other end Is the primary molding process (see Fig. 7 (B)) for processing the unfinished cylindrical body 101 in the closed state and the forging process again through the primary molding process to match the cylinder length and thickness to the set standard To make a hole in the center of the closed end of the second cylindrical molding process (see Fig. 7 (C)) and the second cylindrical molding process for processing the finished cylindrical body 102 to be processed so that The ferrule material 103 is manufactured by the piercing process (refer FIG. 7 (D)).

However, the prior art as described above is to form the ferrule material 103 by using the full-sealed round bar material 100 as the raw material, there is a problem that the processing time is long and the defective rate is high, the productivity is lowered, and also the round bar material 100 It is pointed out that the press forging device used to mold the cylinder has to be enlarged, so that a large amount of facility cost is invested, resulting in lower productivity and higher production cost of the ferrule material.

The present invention was created in order to solve the problems described in the prior art as described above, and the ferrule material processing process by manufacturing a ferrule material using a metal pipe of the same standard as the cylindrical portion of the ferrule as a raw material In addition to the simplification, the manufacturing time can be shortened and productivity can be improved. Furthermore, since the workability can be manufactured with a compact press device, it provides a ferrule material manufacturing method that can greatly reduce the production cost of the ferrule material. It was invented for the purpose.

The present invention as a means for achieving the above object,

A cutting step of obtaining a raw material by cutting the metal pipe manufactured to have a long length in accordance with a desired length;

An upper movable mold having a lower fixed mold having a fixing protrusion for fixing the lower end of the raw material obtained in the cutting process, and a hemispherical processing surface for narrowing the upper end of the raw material placed on the lower fixed mold in a hemispherical shape. It is composed of, and the raw material is placed on the lower stationary mold and press-processed into the upper movable mold to process the upper end portion of the raw material is narrowed into a hemispherical shape to obtain a primary molded material;

A lower fixed mold having a height that is inserted from a lower end of the primary molded material that has been subjected to the primary molding process to a part of the hemispherical shape that is not processed into the buccal tube, and a support protrusion having a flat support surface and a convex protrusion surface at the top thereof; It has an inner diameter that is almost the same as the outer diameter of the primary molded material, and the inner closed end is composed of a flat support surface and a conical crimping surface, which are formed symmetrically with the upper end of the support protrusion, and the upper movable mold. In the state where the primary molded material is fixed to the supporting protrusion, the upper movable mold is pressed to obtain a secondary molded material by pressing the upper end of the primary molded material so that the peripheral part is flat and the central part has a cross-sectional shape. Secondary molding process;

The lower fixed mold has a height that is inserted from the bottom of the secondary molded material that has undergone the secondary molding process to a flat crimped portion, and has a support protrusion formed as a flat support surface on the top thereof, and the outer diameter of the secondary molded material. The inner closed end is formed of an upper movable mold having an inner diameter substantially equal to that of the upper movable mold, and press-processed into the upper movable mold in a state in which a secondary molding material is fixed to the support protrusion of the lower fixed mold. A tertiary molding step of obtaining a tertiary molded material by compressing and flattening an upper end portion of the secondary molded material;

A punching hole and a discharge passage having the same diameter as the small diameter portion of one side of the waste rule material to be manufactured have a height that is inserted from the lower end of the tertiary molded material subjected to the tertiary molding process to a flat crimped part. And a lower fixed mold forming a supporting protrusion having an upper side and an upper movable mold having a punching protrusion inserted into a punching hole formed at an upper end of the supporting protrusion, and forming a tertiary molding on the supporting protrusion of the lower fixed mold. A fourth molding process of pressing the upper movable mold in a state where the raw material is fitted and drilling a hole having a predetermined diameter in the center of the upper end portion of the third molding material to complete the ferrule material;

It is characterized by consisting of.

1 shows a process of obtaining a ferrule material from a pipe to explain the present invention.

Produced drawings.

2 to 5 is a manufacturing process diagram of the ferrule material of the present invention,

2 (A) (B) (C) show step by step primary molding processes,

3 (A) (B) (C) show step by step secondary molding processes,

Figure 4 (A) (B) (C) is a step showing the third molding process,

Figure 5 (A) (B) (C) shows the step of the fourth forming step.

Figure 6 is a cross-sectional view of the use state of the closed rule for explaining the present invention.

Figure 7 (A) (B) (C) (D) is a view showing a method for producing a ferrule material of the prior art.

※ Explanation of code for main part of drawing

1 ferrule material 1a raw material

1b: Primary molded material 1c: Secondary molded material

1d: tertiary molded material 10: ferrule

11: large diameter cylindrical portion 12: small diameter portion

13 pressure ring 20 rubber hose

30: metal pipe 40: metal pipe

5a, 6a, 7a, 8a: Lower fixed mold 5b, 6b, 7b, 8b: Upper movable mold

51, 61, 71, 81: support protrusion 52: hemispherical surface

62,72 support surface 63 conical protrusion

65,73: pressing surface 66: conical pressing surface

82: punching hole 84: punching protrusion

An embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view showing a process of obtaining a ferrule material from a pipe for explaining the present invention, Figures 2 to 5 is a manufacturing process of the ferrule material of the present invention, Figure 6 is a state of use of the waste rule for explaining the present invention Shows a cross-sectional view,

Reference numeral 1 denotes a ferrule material, and the ferrule material 1 has a small diameter portion allowing the insertion of a large diameter cylindrical portion 11 and a metal pipe 30 surrounding the outer circumference of the large diameter rubber hose 20 ( 12) is integrally formed.

The present invention is characterized by manufacturing using a metal pipe 40 manufactured to the same standard as the large diameter cylindrical portion 11 of the ferrule material (1) to be manufactured, the process of manufacturing the ferrule material (1) The manufacturing method and apparatus will be described together by classification.

<Cutting process>

This process is the raw material (1a) to cut the metal pipe 40 manufactured to the same size as the large diameter cylindrical portion 11 of the ferrule material (1) to be manufactured to a predetermined length to produce the ferrule material (1a) (See Figure 1).

<Primary Molding Process>

This process is the process of firstly processing the upper end of the raw material 1a obtained in the cutting process so that the upper end is in a hemispherical shape toward the center. The molding apparatus is composed of a lower fixed mold (5a) is fixed to the lower portion of the press device as shown in Figure 2 and the upper movable mold (5b) to repeat the lower and lower operation from the top of the press device, The upper surface of the lower fixed mold (5a) is formed with a fixing protrusion 51 for fixing the lower end of the raw material (1a), the upper movable mold (5b) has a hemispherical shape of the upper end of the raw material (1a) The hemispherical processing surface 52 which press-processes is formed.

When the lower end of the raw material (1a) is fitted to the fixing protrusion 51 of the lower fixed mold (5a) configured as described above as shown in Fig. 2 (A) the raw material (1a) to the lower fixed mold (5a) When the upper movable mold 5b is lowered and operated, the hemispherical processing surface 52 presses the upper end of the raw material 1a, which is fixed as shown in FIG. The upper end portion of the raw material 1a is pressed into a hemispherical shape by the hemispherical processing surface 52 of the upper movable mold 5b, and the lowering height of the upper movable mold 5b is pressed into a hemispherical shape. It is lowered only to a position where a hole having a suitable diameter is formed in the center, and the upper movable mold 5b is moved after the upper movable mold 5b is lowered and the upper end portion of the raw material 1a is pressed. (C) of FIG. 2 when the lifting operation is performed and the workpiece is demolded. The upper part, as being processed into a semi-spherical shape that the center of the state is obtained, the primary molding material (1b) with a hole is formed.

<2nd molding process>

This process is a process of secondary pressing the upper end portion of the primary molded material (1b) pressed in a hemispherical shape in the above primary molding process, the secondary molding apparatus used in this secondary molding process As shown in 3, the lower fixed mold 6a and the upper movable mold 6b are formed, and the upper surface of the lower fixed mold 6a is deformed into a hemispherical shape from the lower end of the primary molded material 1b. A support protrusion 61 having a height to be inserted up to a portion not formed is formed, and a support surface 62 is formed flat on the upper end of the support protrusion 61 and protrudes upward in the center of the support surface 62. Conical projection 63 is formed.

In addition, the upper movable mold 6b is crimped to press the inserting portion 64 and the upper circumferential portion of the primary molded material 1b to cover the outer circumferential surface while allowing the primary molded material 1b to be inserted. A conical crimping surface 66 recessed upward (based on the drawing) is formed to compress the central portion of the upper surface 65 and the upper portion of the primary molded material 1b into a conical shape.

When the primary molding material 1b is inserted into the support protrusion 61 of the lower fixed mold 6a configured as described above as shown in FIG. The upper end portion of the molded material 1b is pressed as shown in FIG. 3B. Then, when the upper movable mold 6b is operated up and the workpiece is demolded, the upper end as shown in FIG. 3C. The circumferential portion of is pressed flat and the central portion is obtained with a secondary molded material 1c having a cone-shaped cross section.

<3rd molding process>

In this secondary molding process, the upper portion of the secondary molded material 1c, which is press-processed so as to have a flat circumference and a center-shaped cross-section in the secondary molding process, is subjected to a third compression process. The tertiary molding apparatus used in the secondary molding process has a height of being inserted from the lower end of the secondary molding material 1c to the flat crimped portion, as shown in FIG. The upper movable mold 7a, which protrudes from 71, the inserting portion 72 surrounding the outer periphery while allowing the insertion of the secondary molded material 1c, and the upper movable portion formed with a flat pressing surface 73 on the inner closed end. It consists of the metal mold | die 7b.

When the secondary molding material 1c is inserted into the support protrusion 71 of the lower stationary mold 7a configured as described above as shown in FIG. 4A, and the upper movable mold 7b is lowered and operated, the secondary molding material ( 1c) is inserted into the inserting portion 72 of the descending upper movable mold 7b while its upper end is flattened by the pressing surface 73 of the upper movable mold 7b as shown in FIG. When the workpiece is demolded after raising the upper movable mold 7b, the upper part is flat pressed and the life is formed in the center as shown in FIG. The material 1d is obtained.

<4th molding process>

This process is to complete the production of the ferrule material (1) to be manufactured, the fourth molding apparatus used in the third molding process is a third molding material in the lower fixed mold (8a) as shown in FIG. A support protrusion 81 having a height to be inserted from the lower end of 1d to a flat crimped portion is formed, and the upper end of the support protrusion 81 is formed flat, such that a small diameter portion of a ferrule material is formed at the center thereof. A punching hole 82 having an inner diameter is formed, and a discharge passage 83 communicating with the punching hole 82 described above is formed.

And the upper movable mold (8b) is formed in the lower portion of the punching projection 84 for performing the punching operation while being inserted into the punching hole 82 formed in the center of the support protrusion 81 of the lower fixed mold (8a) have.

The third molded material 1d is inserted into the support protrusion 81 of the lower fixed mold 8a having the above configuration as shown in FIG. 5 (A), wherein the third molded material 1d is formed at the upper end of the third molded material 1d. Since the hole is in a state much smaller than the punching hole 82, the small hole formed in the upper end of the tertiary molded material 1d is covering the punching hole 82. Therefore, when the upper movable mold 8b is lowered and operated, the punching protrusion 84 of the upper movable mold 8b punches a portion covering the punching hole 82 as shown in FIG. In this case, the cutting piece punched by the punching protrusion 84 and falling into the punching hole 82 is discharged downward through the discharge passage 83, so that the next punching operation can be performed smoothly.

When the upper movable mold 8b completes the punching operation and rises as described above, the ferrule material 1 as shown in FIG. 5 (C) can be obtained. (1) is made of a finished product in which a large diameter cylindrical portion 11 surrounding the outer circumference of the rubber hose 20 and a small diameter portion 12 allowing the insertion of the metal pipe 30 are formed.

According to the present invention as described above, by manufacturing a ferrule material using a metal pipe manufactured with the same diameter as the large diameter cylindrical portion of the ferrule material to be manufactured as an raw material, the manufacturing process as compared to processing the round bar material into a cylindrical shape as in the prior art In addition, since the upper part of the raw material is pressed and processed sequentially and step by step from the first forming apparatus to the fourth forming apparatus, there is an effect of preventing wrinkles from occurring in the small diameter portion of the pressed ferrule material. In addition, raw materials made of metal pipes can be crimped even with a compact press, which not only reduces the manufacturing process equipment for ferrule materials but also makes it possible to downsize the manufacturing equipment. It is a useful invention that provides an advantage that can be reduced.

Claims (2)

A cutting step of obtaining a raw material 1a by cutting the length of the ferrule material 1 to be made of a long length metal pipe; The raw material (1a) obtained in the cutting process is placed on the lower fixed mold (5a) of the primary molding apparatus and pressed into the upper movable mold (5b) to process the upper end portion of the raw material (1a) into a hemispherical shape. A primary molding step of obtaining a primary molded material 1b having an upper end processed into a hemispherical shape; The primary molding material 1b having undergone the primary molding process is pressed into the upper movable mold 6b while being fixed to the support protrusion 61 of the lower stationary mold 6a of the secondary molding apparatus. Secondary molding which obtains the secondary molded material 1c in which the upper end portion of the molded material 1b is flat and the center portion is compressed to form a cross-sectional shape, and the upper portion is flat and the center portion is conical. Process; The secondary molding material 1c, which has undergone the secondary molding process, is fixed to the support protrusion 71 of the lower fixing mold 7a of the tertiary molding apparatus and is fixed to the flat pressing surface of the upper movable mold 7b. A tertiary molding step of pressing the upper end of the primary molded material 1c to obtain a tertiary molded material 1d having a flat upper end; Punching projections 84 of the upper movable mold 8b in a state in which the tertiary molding material 1d that has undergone the tertiary molding process is fixed to the support protrusions 81 of the lower fixed mold 8a of the fourth molding apparatus. A fourth forming process of punching a furnace to form a ferrule material 1 by drilling a hole having a predetermined diameter in the center of the upper end portion of the third forming material 1d; Method for producing a ferrule material, characterized in that configured in this step. A lower fixing mold 5a having a fixing protrusion 51 for fixing a lower end of the raw material 1a cut to a predetermined length from a metal pipe, and an upper portion of the raw material 1a placed on the lower fixing mold 5a. Primary molded material (1b), which is press-processed into a semi-spherical shape by pressing the raw material (1a) with an upper movable mold (5b) having a hemispherical processing surface (52) formed thereon for narrowing it into a hemispherical shape. A primary forming apparatus for producing a; From the lower end of the primary molded material (1b) has a height that is inserted into the portion that is not processed into a hemispherical shape, the upper support is formed with a support supporting portion 61 protruding upwards of the flat support surface 62 and the conical projection (63) It has a lower fixed mold (6a), and the inner diameter to wrap the outer periphery of the primary molded material (1b) and the inner end of the closed end of the flat surface symmetrical with respect to the support surface and the conical protrusions of the support protrusion (61) Press-molding the primary molding material 1b with an upper movable mold 6b having a crimping surface 65 and a conical crimping surface 66, so that the periphery of the upper part is flat and the cone is flush with the center. A secondary molding apparatus for producing the secondary molded material 1c; A lower fixed mold 7a having a height inserted from a lower end of the secondary molded material 1c to a flat crimped part, and having a support protrusion 71 formed of a flat support surface 72 protruding from the lower end of the secondary molded material 1c; The inner closed end is an upper movable mold 7b having a flat crimp surface 73 formed therein and having an inner diameter that can cover the outer circumference of the secondary molded material 1c. A tertiary molding apparatus for producing a tertiary molded material 1d press-pressed to the flat surface; A punching hole having the same diameter as the small diameter portion 12 on one side of the waste rule material 1 to be manufactured has a height that is inserted from the lower end of the tertiary molded material (1d) to a flat crimped portion. A lower fixed mold 8a forming a support protrusion 81 having a 82 and a discharge passage 83, and a punching protrusion inserted into a punching hole 82 formed at an upper end of the support protrusion 81; The ferrule is completed by forming a hole, such as a small diameter portion 12, which allows the insertion of the metal pipe in the center of the upper portion by pressing the third molded material 1d into the upper movable mold 8b having the upper movable mold 8b formed therein. A quaternary forming apparatus for manufacturing the raw material 1; Apparatus for producing a ferrule material, characterized in that consisting of.