KR101468251B1

KR101468251B1 - Forging device and forging method of crank throw of marine diesel engine using floating die

Info

Publication number: KR101468251B1
Application number: KR1020100059468A
Authority: KR
Inventors: 윤영철; 권일근; 남승현; 허태영; 박연구
Original assignee: 현대중공업 주식회사
Priority date: 2010-06-23
Filing date: 2010-06-23
Publication date: 2014-12-03
Also published as: KR20110139400A

Abstract

The present invention relates to a crank throw forging apparatus for a marine engine using a floating die and a forging method using the same, and its object is to precisely form fin portions of a crank throw by forging to reduce material loss, To provide a crank throw forging apparatus for a marine engine using a floating die capable of shortening the time, improving the work efficiency and shortening the working time, and a forging method using the same.
The present invention provides a method of manufacturing a semiconductor device, comprising: a mounting step of installing a floating die and a die block within a bending die by a guide support so that a die block is positioned at a lower end of the floating die; A preliminary bending step of placing an asymmetric blank on a bending die provided with a floating die and a die block and preliminarily bending the die with an upper bending tool; Removing the die block from the bending die after the pre-bending; And a bending step of bending the upper bending tool by a press while the die block is removed.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a crank throw forging apparatus for a marine engine using a floating die and a forging method using the same,

The present invention relates to a crank throw forging apparatus for a marine engine using a floating die and a forging method using the same, and more particularly, to a method of manufacturing a crank stroke forging apparatus for a marine engine using a floating die, The present invention relates to a crank throw forging apparatus for a marine engine using a floating die capable of precisely forging a fin portion by installation and disassembly, and a forging method using the same.

Generally, it is called forging, which is made by putting the material between the molds of a certain shape and hopping and hoping, and such forging is used in making crank throws for large engines of ships.

In order to manufacture a conventional crank throw for a large-sized engine, an in-line is heated in a heating furnace, and then made into a blast shape by hot forging using a press, and the bloom is forged with a T-shaped preform by forging . As described above, the forged preform is subjected to a bending operation to form a U-shape by using an upper bending tool and a bending die, a manual U-shaped article is subjected to manual gas cutting and machining to form a circular pin shape .

That is, after the preliminarily molded workpiece is heated, it is placed between the upper bending tool and the bending die, and the upper bending tool is moved in the direction of the bending die to bend the preform to a ' An upper bending tool having a semi-circular semicircular groove and a pin forming portion are used to form the fin portion.

However, since the conventional forging method has a fin forming portion on the bottom surface of the bending die, it is difficult to form the fin portion at an accurate position due to the depth of the bending die during bending work of the preform by the upper bending tool.

Also, in the conventional forging method, defects due to reduction in thickness occur at the connection portion between the pin and the wing during the bending operation, manual gas cutting operation due to the surplus material of the fin portion takes much time and noise and gas cause harmful There is a difficulty in working in the environment.

The object of the present invention is to precisely form fin portions of a crank throw by forging to reduce loss of material, reduce gas cutting work and machining time, and thereby improve work efficiency And to provide a crank throw forging apparatus for a marine engine using a die block capable of shortening a working time and a forging method using the same.

It is another object of the present invention to provide a crank throw forging apparatus for a marine engine using a die block capable of minimizing the gas cutting operation and improving the work environment and maintaining the health of the operator, and a forging method using the same .

The present invention relates to an upper bending tool and a bending die forming a fin portion,

A lower fuze installed to be positioned in the bending die,

A guide supporter having both ends of the floating die inserted into the vertical guide grooves and positioned so as to be positioned outside the bending die,

And a die block installed in the bending die so as to be positioned below the floating die and supporting the floating die and being separated from the bending die through the vertical guide groove.

The present invention relates to a mounting step of installing a floating die and a die block within a bending die by means of a guide support so that a die block is located at the lower end of the floating die

A preliminary bending step of placing an asymmetric blank on a bending die provided with a floating die and a die block and preliminarily bending the die with an upper bending tool;

A die block removing step of removing the die block after the preliminary bending;

And a bending step of bending the upper bending tool by a press while the die block is removed.

As described above, in the present invention, since the floating die is supported by the die block, it is possible to preform the fin portion on the upper side of the bending die when forming the fin portion by the upper bending tool, So that the pin portion can be accurately formed.

Further, since the floating die is moved up and down along the guide groove of the guide supporter, and the floating die is supported by the die block, the present invention has many advantages such that the pin portion of the asymmetric blank can be formed at an accurate position.

1 is an illustration showing a configuration according to the present invention;
Fig. 2 is an exemplary view showing installation and disassembly of a die block according to the present invention; Fig.
Fig. 3 is a photographic example according to the present invention
4 is an exemplary view showing a bending process according to the present invention.

FIG. 1 is an exemplary view showing a construction according to the present invention, FIG. 2 is an exemplary view showing installation and separation of a die block according to the present invention, FIG. 3 is a photograph illustrating an example of a photo according to the present invention,

The present invention relates to a bending apparatus for a semiconductor device, which comprises an upper bending tool 10 and a bending die 20 forming a fin portion, a floating die 30 installed in the bending die 20, A guide support 40 inserted into the groove 41 and installed to be positioned outside the bending die 20 and a floating die 30 installed in the bending die 20 to be positioned below the floating die 30, And a die block 50 separated from the bending die 20 through the vertical guide grooves 41. The die-

Since the upper bending tool 10 and the bending die 20 are known bending tools for forming the fin portion, a detailed description thereof will be omitted.

The floating die 30 is for forming a fin portion and includes a semicylindrical groove 32 and guide rods 31 inserted into the vertical guide grooves 41 of the guide supporter 40 at both ends thereof Respectively.

The guide supporter 40 guides the floating die 30 up and down to set the position of the floating die 30 and includes a bottom guide 42 that is held in contact with the bottom surface, And a support guide 43 formed vertically and having vertical guide grooves 41. [ At this time, the vertical guide groove 41 has a long groove shape and is formed to be perpendicular to the bottom guide 42.

The die block 50 supports the floating die 30 and is disposed to be positioned between the floating die 30 and the bending die 20. One side 51 of the die block 50 is connected to the vertical guide groove 40 of the guide support 40 41 of the bending die 20 so as to protrude outside the bending die 20.

The die block 50 is further provided with a handle 52 for easily separating the bending die 20 from the bending die 20 at one side protruding outside the bending die 20.

The thickness L1 of the die block 50 is smaller than the width L2 of the vertical guide groove 41 so that the bending die 20 is guided through the vertical guide groove 41 of the guide support 40, So that it can be inserted and separated.

The thickness L3 of the floating die 30 is set to be larger than the width L2 of the vertical guide groove 41 and the thickness of the floating die 30 through the vertical guide groove 41 of the guide support 40, .

The forging method using the present invention thus constructed will be described as follows.

4 is a view showing an example of a bending process according to the present invention. The present invention is a method of floating a bending die 20 into a bending die 20 by a guide support 40 so that a die block 50 is positioned at a lower end of a floating die 30 An installation step of installing the die 30 and the die block 50;

A preliminary bending step of placing the blank 70 on the bending die 20 provided with the floating die 30 and the die block 50 and preliminarily bending the upper bending tool 10;

Removing the die block (50) to remove the die block (50) after the preliminary bending;

And a bending step in which the upper bending tool 10 is finally bent by pressing (not shown) while the die block 50 is removed.

The mounting step may be performed by providing a guide rod 40 spaced apart from the bending die 20 so that the bending die 20 is interposed therebetween and a guide rod 40 formed on both sides of the floating die 30 in the vertical guide groove 41 of the guide support rod 40 The die block 50 is inserted into the lower portion of the floating die 30 through the vertical guide groove 41 of the guide support 40. [

The preliminary bending step is a preliminary bending step with the upper bending tool 10 in a state in which the blank is supported by the bending die 20. Since the position of the floating die 30 is located above the bending die 20 , Pin formation to the correct position and bending to an accurate shape are possible.

The step of removing the die block 50 is a step of separating the die block 50 located at the lower end of the lower tool part from the bending die 20 through the vertical guide groove 41 after the preliminary bending, The die block 50 is detached from the bending die 20 by using the one side 51 or the handle 52 provided on the one side.

The bending step completes the bending operation on the blank 70 in the bending die 20 by pressing the upper bending tool 10 by a press after removing the die block 50. At this time, since the floating die 30 is positioned in the blank, when the upper bending tool 10 is pressed, the position of the fin portion is precisely formed without being changed.

As described above, since the formation of the fin portion is performed by the preliminary bending according to the installation of the die block 50 and the final bending due to the removal of the die block 50, the fin portion can be precisely formed.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

(10): upper bending tool (20): bending die
(30): Floating die (31): Guide rod
(40): guide support (41): vertical guide groove
(42): bottom guide (43): support guide
(50): die block (51): one side of die block
(52): Handle (70): Blank

Claims

An upper bending tool and a bending die forming a fin portion,
A floating die installed to be positioned in the bending die,
A guide supporter having both ends of the floating die inserted into the vertical guide grooves and positioned so as to be positioned outside the bending die,
And a die block installed in the bending die to be positioned below the floating die and separated from the bending die through the vertical guide groove to support the floating die.

The method of claim 1,
The floating die has a semi-circular groove, a guide rod inserted into the vertical guide groove of the guide support at both ends,
Wherein the guide support comprises a bottom guide which is in contact with the bottom surface and a support guide which is formed perpendicular to the bottom guide and which has a vertical guide groove,
Wherein the die block is formed such that one side of the die block protrudes outside the bending die through a vertical guide groove of the guide supporter.

A mounting step of installing the floating die and the die block within the bending dies by the guide supporter so that the die block is positioned at the lower end of the floating die;
A preliminary bending step of placing an asymmetric blank on a bending die provided with a floating die and a die block and preliminarily bending the die with an upper bending tool;
A die block removing step of separating and removing the die block from the bending die after the preliminary bending;
And a bending step of bending the upper bending tool by a press while the die block is removed. The forging method using a crank throw forging apparatus for a marine engine using a floating die.