KR101573111B1 - Exhaust Tip manufacture method and Exhaust Tip pressing apparatus - Google Patents

Abstract

The present invention relates to a manufacturing method for manufacturing an exhaust tip which is installed in a muffler connected to an engine of an automobile and exhausts an exhaust gas, and an exhaust tip manufacturing mold will be.
The present invention relates to a cutting process for cutting a raw material plate, a bending process (B) for forming a bending portion horizontal to the raw material plate, a curling process for bending a raw material plate having a bent portion, a curling and welding process (C), and a pressing process (D) for vertically bending and ending the end portion.
The present invention has the effect of not only improving the productivity of the exhaust tip, but also reducing the production cost of the exhaust tip.

Description

TECHNICAL FIELD [0001] The present invention relates to a method of manufacturing an exhaust tip of an automobile, and a mold for forming an exhaust tip,

The present invention relates to a method of manufacturing an exhaust tip for an automobile and a mold for forming an exhaust tip, and more particularly, to a method of manufacturing an exhaust tip which is installed in a muffler connected to an engine of an automobile to finish an end portion of an exhaust port, And a mold for forming an exhaust tip used in the exhaust tip manufacturing method as described above.

The exhaust gas generated in the engine of the vehicle is discharged through the rear exhaust pipe, and the muffler associated with the rear exhaust pipe is exhausted to the outside through the exhaust port (tail exhaust pipe) after reducing the noise.

Background Art [0002] In recent years, as a consumer's desire for exterior design of a vehicle has increased, an ornamental tip is increasingly used as a finishing material for an exhaust port exposed to the outside of a vehicle.

In recent years, in order to consider the aesthetics of automobiles, the exhaust port of the muffler is integrally formed with the bumper. In order to make the exhaust port of the muffler integral with the bumper, a separate exhaust tip for closing the exhaust port And a plurality of bends bent in different directions can be formed in the exhaust tip.

In the past, the exhaust tip was manufactured by using a drawing process and a heat treatment process, in which a surface was processed by using a roller, and various types of processes. Since the vent tip is a mixture of bent portions bent in different shapes (directions), the manufacturing process is complicated none.

In the conventional manufacturing process of the exhaust tip, "drawing process of a plurality of times for a pipe-shaped material" → "heat treatment (annealing) for drawing material" → "drawing process" → "primary cutting process" → "Trimming" → "Curling" → "Bulging" → "Second Cutting" → "Buffing" → "First Blanking" → "First Bending" → "Second Blanking" → " The manufacturing process of the exhaust tip is completed by attaching the fixing bracket to the bent cylindrical body formed by a series of processes such as "secondary bending", "third blanking", and "third bending".

The conventional exhaust tip manufacturing as described above requires not only a lot of processing steps but also repeated heat treatment in order to prevent cracking of the material. Therefore, the productivity is decreased, the cost due to the manufacturing of the exhaust tip is inevitably increased, In addition to the use of processing equipment, the need for a large number of manpower for the operation also contributes to the cost increase.

The present invention has been made in order to solve the problems caused by the manufacturing of the conventional vent tip as described above, and it is possible to complete the manufacturing of the vent tip by a simpler process, thereby improving the productivity of the vent tip and reducing the production cost The present invention provides a manufacturing method of an exhaust tip for a vehicle,

It is still another object of the present invention to provide a mold apparatus optimized for finishing pressing of an exhaust tip.

In order to accomplish the above object, the present invention provides a method of manufacturing a cutting tool, including a cutting process for obtaining a raw material plate, a bending process for forming a bending portion horizontal to the raw material plate, a bending process for bending a raw material plate having a bent portion, A curling and welding process, and a pressing process for vertically bending the end portion.

The method of manufacturing an exhaust tip according to the present invention can manufacture an exhaust tip with simple process water. According to the present invention, not only the productivity of the exhaust tip can be improved, but also the production cost of the exhaust tip can be reduced It is effective.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a process diagram of an exhaust tip manufacturing method according to the present invention; FIG.
2 is a perspective view showing an embodiment of a raw material plate processed by the present invention;
3 is a perspective view showing a state where a raw material plate is curled according to the present invention.
FIG. 4 is a perspective view showing an embodiment of an exhaust tip that has been manufactured by the present invention. FIG.
5 is a cross-sectional view for explaining a configuration of a mold for forming an exhaust tip shown in the present invention.
Figs. 6A, 6B, and 6C are reference sectional views for explaining the operation relationship of the vent hole tip forming mold. Fig.

1 is a process diagram of a method of manufacturing an exhaust tip according to an embodiment of the present invention. Referring to FIG. 1, the present invention includes a cutting process (A) for obtaining a raw material plate, a process for forming a horizontal bend A bending process (B), a curling and welding process (C) for bending and welding a raw material plate having a bent portion in a cylindrical shape, and a pressing process (D) for bending the end portion vertically As a result, detailed implementation of each process is performed as follows.

Cutting process - This process is a process for obtaining a raw material plate in which a finished exhaust tip is developed, and a plate-like metal material is cut by a cutting means (press or the like) or a laser cutting means, .

Bending Process- This process is a process for forming the bend of the vent tip and forms a horizontal bend 3a that is bent horizontally on the blank plate 1a by means such as a bending press or a foaming machine. (See Fig. 2)

Curling and Welding Process The present process is a process for realizing the shape of an exhaust tip. A raw material plate 1a having a horizontal bending portion 3a formed in a molding die manufactured in accordance with the appearance of the exhaust tip is inserted, Both ends of the raw material plate 1a are welded by means of a welding means in a state in which the raw material plate 1a is bent so that both end portions of the raw material plate 1a are in contact with each other so that the raw material plate 1a is welded to the outside Shaped to maintain the shape.

The curling and welding process can be completed in one sequential process using a molding frame, equipment in which banding means and welding means are integrated.

The horizontal bending portion 3a perpendicular to the axial direction of the body 2 can be formed through the bending process and the curling and welding process as described above and the exhaust portion 2a provided at the upper end of the molded body 2 can be formed, The wing plate W extending outward could be formed (see Fig. 3).

Molding Process - This process is a process for finishing the manufacturing of the exhaust tip by machining the blade plate W formed on the exhaust portion 2a. The material to be curled and welded is charged into a press machine equipped with a molding die, The vane plate W formed on the vane 2a is vertically bent downward to form a skirt portion 3b extending downward at the end portion of the exhaust portion 2a to complete the production of the exhaust tip 1.

4, the exhaust tip 1 manufactured by the present invention has a structure in which the body 2 and the exhaust part 2a at the upper end are integrally formed with each other, In the body 2 and the exhaust part 2a, the horizontal bending portion 3a and the vertically bent skirt portion 3b are mixed. The body 2 of the exhaust tip 1 is formed with one or more horizontal bends 3a orthogonal to the axial direction of the body 2 and is provided at the end of the exhaust portion 2a in the axial direction of the body 2 And a downwardly bent skirt portion 3b is formed.

5 shows a preferred embodiment of the exhaust tip forming mold 10 according to the present invention. As shown in FIG. 5, the exhaust tip forming mold 10 includes a lower mold 20 fixedly installed on a work bench of a press machine, And an upper mold 30 attached to the lifting rod of the press machine and lifted and lowered.

The lower mold 20 is provided with a molding core 21 corresponding to the internal shape of the exhaust tip to be molded and has a pressing face 22a which can receive the external shape of the vent tip around the molding core 21, And the sliding clamp 22 is moved forward or backward in the direction of the forming core 21 by driving the clamp driving means 23 provided at one side of the lower mold 20 And an eject pin 24 is provided below the molded core 21 so as to be raised and lowered by the ejection elevating /

The upper mold 30 is provided with a molding block 31 corresponding to the molding core 21 and a wing plate 31 formed at the upper end of the exhaust portion 2a of the exhaust tip 1 to be molded, A molding groove 32 for molding an outer shape of the skirt portion 3b is provided by pressing the molding die W to form a molding blade 32 at a boundary point between the molding block 31 and the molding groove 32 of the molding groove 32 33 are formed.

At this time, the clamp driving means 23 and the ejection elevating / lowering means 25 provided on the lower mold 20 are constructed to operate in conjunction with the operation of the press machine (the operation of raising and lowering the upper mold) When the press machine is operated in a state where the molding material is put in the molding core 21 of the lower mold 20, the "advance of the sliding clamp 22 by the clamp driving means 23" → " Lowering the upper mold 30 and lowering the ejection pins 24 by the ejection elevating and lowering means 25 and moving the sliding clamp 22 backward by the clamp driving means 23, And "lowering of the eject pin 24 by the ejection elevating and lowering means 25 ", and the like are sequentially performed.

The exhaust tip molding die 10 having the above-described structure is provided with an upper mold 30 on an elevating and lowering rod which is raised and lowered by a lifting device such as a driving wheel or a driving cylinder of a press machine, The body 2 of the material S to be molded is inserted into the molding core 21 of the lower mold 20 to form the body 2 of the molding material S, The clamping drive means 23 is driven to move the sliding clamp 22 toward the molding core 21 to move the molding material S Descending rod that is lowered by the lifting / lowering device descends the upper mold 30 and is guided to the forming block of the upper mold 30, (32) of the sliding block (31) The upper and lower molds 30 and 20 are combined so that the upper mold 22 and the upper portion of the molding core 21 are coupled to each other. In this process, the molding blade 33 of the molding block 31, And a skirt portion 3b which is bent downward in the vertical direction is formed in the molding material S (refer to Fig. 6 [B]).

When the forming of the material is completed, the lifting / lowering rod lifted and lowered by the lifting / lowering device lifts the upper mold 30, and the ejection lifting / lowering means 25 raises and lowers the ejection pin 24 to form the formed skirt portion 3b. And the clamping drive means 23 is driven to move the sliding clamp 22 backward in the direction opposite to the forming core 21 to release the clamping state so as to move the sliding clamp 22 against the skirt portion 3b The exhaust tip 1 that has been formed can be discharged, and the elevating and lowering means 25 immediately operates to lower the eject pin 24 (see FIG. 6 [C]).

1: Vent hole tip 1a: Material disk
2: body 2a: exhaust part
3a: Horizontal bend portion 3b: Skirt portion
10: exhaust tip molding die 20: lower mold
21: Molded core 22: Sliding clamp
23: Clamp driving means 24: Eject pin
25: ejection elevating / lowering means 30: lower mold

Claims (2)

A cutting step (A) of cutting a plate-shaped metal material into an enemy shape for producing an exhaust tip by using a cutting means (press or the like) or a laser cutting means;
A bending step (B) of forming a horizontal bending part (3a) which is horizontally flat in the left and right direction and bent in the up and down direction on the base material sheet (1a) by means such as a bending press or a forming machine;
A raw material plate 1a having a horizontal bending portion 3a formed therein is inserted into a forming die manufactured in accordance with the external appearance of the exhaust tip, and then the raw material plate 1a is bent in left and right directions using bending means, A curling and welding process (C) for welding both left and right ends of the raw material plate (1a) using welding means while both end portions are in contact with each other;
A molding step for forming a skirt portion 3b at the end of the exhaust portion 2a by vertically bending the wing plate W formed on the exhaust portion 2a after the curling and welded material is put in the press machine D). ≪ / RTI > A mold for forming an exhaust tip for an automobile manufactured by the method of claim 1, comprising a cylindrical body including a section where the diameter becomes narrower toward the upper part, the inside is penetrated to form a through hole, and an upper end of the through hole is formed with an exhaust part And a skirt portion extending from the body toward an outer lower side of the exhaust portion,
A lower mold 20 fixed and installed on the work table of the press machine and an upper mold 30 attached to and lifted from the elevating rod of the press machine,
The lower mold 20 is provided with a molding core 21 corresponding to the internal shape of the exhaust tip 1 to be molded and has a compression face 21 for receiving the external shape of the exhaust tip, The sliding clamp 22 is moved forward or backward in the direction of the forming core 21 by driving the clamp driving means 23 provided at one side of the lower mold 20, The ejection pin 24 is provided below the molded core 21 so that the ejection pin 24 is raised and lowered by the ejection elevating and lowering means 25;
The upper mold 30 is provided with a molding block 31 corresponding to the molding core 21 and is provided with a skirt portion 31 formed at the upper end of the exhaust portion 2a of the exhaust tip 1 to be formed, A molding groove 32 capable of accommodating the outer shape of the molding block 3b is provided so that the molding blade 33 is formed at the boundary between the molding block 31 and the molding groove 32 of the molding groove 32 Characterized in that it is a mold for forming an exhaust tip.

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