KR19980036985A - Method for manufacturing joint flange for automobile exhaust pipe and device - Google Patents

Abstract

The present invention provides a processing flange, i.e., an upper die having a predetermined machining portion formed at a bottom thereof in which several workpieces are formed in correspondence with the movement pitch of the workpiece while simultaneously moving the workpiece one step at a time in the lower die of the press. By repeatedly punching and lowering the material into a desired shape on a progressive die, press punching is used to simplify the manufacturing process of the joint flange for automobile exhaust pipes, thereby preventing safety accidents and significantly reducing manufacturing costs. Positioning the plurality of blanking material (a) in the guide (3) on one side of the lower mold (2) to sequentially pitch movement to the second moving means (S2) by the first moving means (S1), and the moved material ( a) sequentially moving the pitch into the lower mold (2) by the second moving means (S2), and repeatedly raising and lowering the upper mold (1) for each material (a) that is sequentially pitched. Pierce, saving by the small-step for applying a reverse gradient and chamfering processing are sequentially and a step of sequentially taken out by the processing is complete the material (a) to the take-out means (S3) and; A method of manufacturing a joint flange for an automobile exhaust pipe and an apparatus thereof are provided.

Description

Method for manufacturing joint flange for automobile exhaust pipe and device

1 is an exploded perspective view of the apparatus according to the present invention

(A)-(h) of FIG. 2 is a process chart which shows the flange manufacturing process by the method of this invention.

3 is an illustration of a manufacturing method according to the present invention

(A) to (D) of FIG. 4 are exemplary diagrams of materials and finished products according to the progress of each process.

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

A: Flange a: Material

1: upper type 2: lower type

3, 4: guide S1: first moving means

S2: second moving means S3: take out means

11 piercing part 12: shaving-reverse gradient part

13: Chamfering Process

The present invention relates to a method for manufacturing a joint flange for an automobile exhaust pipe, and a device thereof, and more particularly, to a workpiece flange, that is, a material to be moved at the same time in a step-by-step manner in a lower die of a progressive die. Joints for automobile exhaust pipes by pressing and punching the material into the desired shape from the sequential feed mold by repeatedly raising and lowering the upper die of the sequential feed mold formed on the bottom of the workpiece to correspond to the moving pitch of the material. By simplifying the manufacturing process of flanges, it prevents safety accidents and significantly lowers the manufacturing cost of products.

In general, the joint flange used in the exhaust pipe joint of the automobile is subjected to each processing step to achieve a predetermined shape on the blanking material (a), as shown in FIG. Through the piercing process, a predetermined hole (a2) and a3 are formed in the material (a), and then the pierced material (a) is transferred to the next process of shaving (shaving) to the material (a). The inner surface of the formed hole a2 is precisely and smoothly processed. In this way, when the precision processing on the inner surface of the hole (a2) formed in the center of the material is finished, it is sent to the reverse gradient process to prevent the deformation of the material (a) generated during welding of the flange (A) as a finished product. Bend a certain angle so that it is symmetrical about the center in the longitudinal direction.

In this way, when the back gradient of the material (a) extends to the end, the material (a) is finally sent to the chamfering process and finished by finishing the finishing work such as chamfering on the periphery of the hole (a2) of the material (a). It is to be manufactured as a joint flange (A) for one exhaust pipe.

However, the conventional exhaust pipe joint flange manufactured through the above-described multi-step manufacturing process can significantly reduce work efficiency because the manufacturing process can only obtain one finished product only through a multi-step complex manufacturing process. In addition, there is a considerable problem of safety accidents, such as lowering the productivity of the product to increase the manufacturing cost.

Accordingly, the present invention allows a plurality of blanking materials to be sequentially moved by a predetermined pitch step by step in view of all the problems caused by the conventional manufacturing method for manufacturing a joint flange for automobile exhaust pipes as described above through multiple processes. In order to improve the productivity of the product as well as to increase the productivity of the product by sequential rising and falling operation of the upper mold that formed a plurality of processing parts corresponding to the movement pitch of the material, and to be moved to be installed on the lower mold. The purpose of the present invention is to provide a method and apparatus for manufacturing a joint flange for an automobile exhaust pipe that can contribute to reinforcing the manufacturing competitiveness of flange parts according to the reduction of manufacturing cost of a product, which will be described in detail with reference to FIGS. 2 and 3. Is as follows.

The first moving step of placing a plurality of blanking material (a) in the guide (3) on one side of the lower mold (2) to sequentially pitch-shift by the first moving means (S1) toward the second moving means (S2), A second moving step of sequentially moving the work piece (a) into the lower mold (2) by the second moving means (S2), and repeatedly raising and lowering the upper mold (1) with respect to each work material (a) that is sequentially pitch-shifted. A processing step of sequentially performing piercing, a shaving-reverse gradient and chamfering processing by an operation, and a taking out step of sequentially taking out the finished material (a) via the guide 4 by a takeout means (S3); It is a method of manufacturing a joint flange for automobile exhaust pipe, characterized in that.

In addition, in the present invention, as shown in FIG. 1, first and second moving means S1 and S2 and take-outs are provided on both sides of the lower mold 2 in which a plurality of raw materials a are installed to be pitch-movable therein. Guides 3 and 4 each having means S3 attached thereto are attached to each other, and an upper portion of the lower mold 2 is provided with a piercing processing portion 11, a shaving-reverse gradient processing portion 12, and a chamfering processing portion 13 To manufacture a joint flange for automobile exhaust pipe, characterized in that the upper mold (1) respectively installed in the bottom corresponding to the moving pitch of the material (a) is installed so as to repeatedly move up and down corresponding to the lower mold (2). Device.

In the drawings, reference numerals 14, 15, and 16 denote idle processing portions provided in the upper die 1.

In the above configuration, push cylinders are preferably used as the first and second moving means S1 and S2 and the takeout means S3, but the present invention is not necessarily limited thereto, and the material a is sequentially moved by one pitch. Also in the operation to make the upper die (1) is configured in conjunction with the repeated rising and lowering operation.

The manufacturing method of the joint flange for automobile exhaust pipe according to the present invention having the above-described method and configuration, and the operational operation state and effect of the apparatus will be described in detail as follows.

First, as shown in (a) of FIG. 2, when the apparatus is operated in a state where a plurality of blanking materials (a) having a square hole (a1) formed in the center are placed on the guide (3) on one side of the lower mold (2). First, the material a is sequentially pushed by the first moving means S1 to the lower mold 2 side by one step to move the pitch to the second moving means S2 side as shown in FIG. 2B. Will be reached. Thereafter, the material (a) is moved by the second moving means to the inside of the lower mold (2) sequentially by one step, and the pitch is moved. It will be.

That is, when the upper mold 1 is lowered in the state where the material a is first entered in the lower mold 2 ((C) of FIG. 2), the material shown in (C) of FIG. 2 of the upper mold 1 ( The idle processing unit 14 corresponding to the position of a ') controls the position while passing through the center square hole a1 of the material a' as it is, and as the upper mold 1 rises, it rises again to the original position. Then, another one of the materials (a) is pushed by the first moving means again to the second moving means (S2) side, so that the second moving means (S2) again pushes the material (a) into the lower mold (2) to move. This material (a ') is sequentially moved one pitch to the next position ((d) of FIG. 2), and at this time, the upper body 1 is lowered and the piercing processing part 11 at the bottom thereof is moved to the material (a'). After forming the predetermined holes a2 and a3, the upper die 1 is raised again. Subsequently, another material a is moved to the second moving means S2 by the first moving means S1 and the material a 'is continuously lowered by the second moving means S2. (2) As the material is pushed into, the material a 'is sequentially moved back to the next position ((e) in FIG. 2), and at this time, the upper part 1 is lowered and the idle machining part 15 is formed in the hole. After controlling the position while passing through (a2) as it is, the upper die 1 is raised again.

Then, as before, another workpiece (a) is pushed into the lower mold (2) by the first moving means (S1) and the second moving means (S2) and pitch shifts sequentially, so that the workpiece (a ') is sequentially pitched again. Moving to the next position (bar in Fig. 2), and at the same time the upper die 1 is lowered, causing the shaving-reverse grade processing part 12 to see the inner surface of the hole a2 already formed in the workpiece a '. As shown in (b) of FIG. 4, a slight gradient is formed in the longitudinal direction of the material (a ') to precisely process and absorb the heat deformation of the material due to welding when the material (a') is used. After the molding (1) is raised again. Then, as another workpiece a is pushed into the downward direction 2 by the first movement means S1 and the second movement means S2, the workpiece a 'is moved to the next position (Fig. Pitch sequential movement of the pitch ()) and lowering the upper die (1) again to allow the chamfering processing unit (13) to chamfer to remove the burb formed during shaving in the central hole (a2) of the material (a '). After the upper mold 1 is raised, the flange A as a finally finished finished product as shown in (d) of FIG. 4 can be obtained.

Subsequently, the punching-processed material (a '), that is, the flange (A) as a finished product, moves by one pitch to the next position (second step) according to the sequential movement of the material (a) into the lower mold (2). (A)), the moved flange A is taken out by the guide 4 by the operation of the takeout means S3, and is collected and shipped as a final product.

The above-described series of manufacturing processes have been described using the process for the material a 'as an example, but all the materials (a) continuously added to the material a' are continuously moved one pitch at a time to perform the same manufacturing process as the material a '. Through the flange (A) as a finished product is to be produced.

In addition, the movement of the moving means (S1) (S2) and the take-out means (S3) in conjunction with the up and down, descending repeating operation of the upper mold (1) while the material (a) is continuously pitch shifted into the lower mold (2) The raw material (a) is sequentially moved one pitch at a time, and the finished material (a '), that is, the flange (A) as a finished product is taken out.

As apparent from the above description, according to the method and apparatus for manufacturing a joint flange for an automobile exhaust pipe according to the present invention, a plurality of processing portions for punching a material into a predetermined shape are formed on an upper mold which repeats the up and down movement. Simplify the flange manufacturing process by automating the device to obtain a certain product in a short process without having to go through several complicated manufacturing processes by punching as a specific form at that time in order to sequentially move the material by one pitch. By maximizing the productivity of the product, it is possible to reduce the cost and to prevent the safety accidents caused by the automation, thereby providing a useful effect that can greatly contribute to strengthening the flange manufacturing competitiveness.

Claims (2)

A first moving step of placing a plurality of blanking material (a) in the guide (3) on one side of the lower mold (2) to sequentially pitch-shift by the first moving means (S1) to the second moving means (S2) side, and the moved The second movement step of sequentially moving the material (a) into the lower mold (2) by the second moving means (S2), and the repeatedly raising and lowering of the upper mold (1) for each material (a) that is sequentially pitch-shifted A processing step of sequentially performing piercing, shaving-reverse gradient and chamfering processing by an operation, and a taking out step of taking out the processed material (a) sequentially by taking out means (S3); A method of manufacturing a joint flange for automobile exhaust pipes, characterized in that as follows. Guides 3 provided with first and second moving means S1, S2 and takeout means S3, respectively, on both sides of the lower mold 2 on which a plurality of raw materials a are arranged to be pitch-movable. (4) is attached and installed on the upper part of the lower mold 2, the piercing processing portion 11, the shaving-reverse gradient processing portion 12 and the chamfering processing portion 13 corresponding to the moving pitch of the material (a) An upper flange (1) respectively provided at the bottom thereof is provided for a joint flange manufacturing apparatus for automobile exhaust pipe, characterized in that it is installed so as to repeatedly move up and down in response to the lower mold (2).