KR101772617B1 - collar manufacturing method using the multi stage forming, and apparatus of the same - Google Patents

Abstract

The present invention relates to a method and an apparatus to manufacture a collar using multistage forming and, more specifically, relates to a method and an apparatus to manufacture a collar using multistage forming, manufacturing a collar of a cylindrical shape without a deviation in thickness. According to the present invention, the method comprises: a drawing step of using a drawing punch to press a planar object to be processed to manufacture a first processed body of a container shape having a flange formed on an upper side; a first forming step of pressing the flange of the first processed body through a flange pressing part to primarily press and fixate the first processed body to a die with a diameter smaller than that of a container; and a second forming step of secondarily pressing and fixating the first processed body pressed and fixated to the die as much as a predetermined depth through the first forming step to manufacture a second processed body.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a collar manufacturing method and a manufacturing apparatus using the multi-

The present invention relates to a method and apparatus for manufacturing a color using multi-stage molding, and more particularly, to a method and apparatus for manufacturing a collar using multi-stage molding for manufacturing a collar in the form of a hollow cylindrical column without variation in thickness.

Generally, when a fastening member such as a bolt or a pin is directly coupled to a plastic injection molding or a structure, there is a problem that a plastic injection molding or a structure is damaged in an impact or a fastening process.

Accordingly, a collar having rigidity is insert-injected into or inserted into a plastic injection molding or a structure so that the fastening member can be coupled more strongly and a strong fastening force against impact can be maintained, So that the engaging force of the fastening member is increased.

Also, a method for joining a collar made of a metal material to a plastic injection object more effectively, such as Korean Patent No. 10-1408753, entitled " METHOD OF FITTING METAL COLOR AND METAL COLOR ", has been developed. It is manufactured on the basis of a hollow cylindrical shape with a hole in the center for insertion, and is manufactured by forging using a press rather than a cutting process so as to have high rigidity.

In the drawing process during the manufacturing process of the collar 10 using the press, as shown in Fig. 1, the workpiece is formed into a container shape while the punch 3 is pressed into the plate-shaped workpiece by the die 2, The work piece should be formed into a container shape corresponding to the shape of the die 2 while the material of the V1 portion located on the upper side of the workpiece is pressed into the die 2 by the punch 3 like R1, The punch 3 is lowered to a predetermined depth and the material (foil) V2 of the side surface of the member to be processed by the punch 3 is elongated like R2 to be thinner and the void space A1 is formed (Thickness variation) occurs due to the elongation of the material (V2) on the side face (thickness V2).

That is, in the drawing process in which the workpiece is shaped by the punch 3, the material (V1) on the upper side by the volume of the empty space A1 formed by elongation of the side material (V1) The formation of the empty space A1 should be suppressed while it is inserted into the die 2 but the fluidity of the workpiece made of metal is not good enough to suppress the formation of the empty space A1.

As a method for solving this problem, although the thickness deviation is slightly reduced through the drawing process by reducing the diameter of the die 2 as shown in (1-II) of FIG. 1, There was a difficult problem.

A method of forming the groove 11 on the outer surface of the collar 10 so that the collar 10 can be more strongly bonded to the plastic molded product or structure is used. However, in the process of pressing to form the groove 11 There is a problem that the color is distorted due to the pressure applied from the outer surface of the collar, or the groove depth is uneven and the defects often occur.

Korean Patent No. 10-1408753 entitled " Method of mounting metal collar and metal collar "

SUMMARY OF THE INVENTION An object of the present invention is to provide a method and apparatus for manufacturing a color using a multi-stage molding process for manufacturing a hollow cylinder-shaped collar without variations in thickness.

Another object of the present invention is to provide a method of manufacturing a color using a multi-stage molding and an apparatus for manufacturing the same to increase the uniformity of the groove formed on the outer surface of the collar.

In order to achieve the above object, the present invention provides a method of manufacturing a collar using multi-stage molding, the method comprising the steps of: forming a hollow cylindrical collar with a thickness variation, A drawing step of producing a container-shaped first processed material having a flange formed on the upper side by pressing the workpiece; and a step of pressing the flange of the first processed material through the flange pressing part to form a first processed object on a die smaller than the diameter of the container And a second processed body is manufactured by second press-fitting the first processed body, which is press-fitted into the die by a predetermined depth through the first forming step, to the die through the end of the forming punch And a second forming step.

And a hole machining step of forming a hole in the bottom of the second processed body by penetrating the bottom of the second processed body with a hole machining punch.

The method may further include a groove machining step for forming grooves by using a plurality of grooved slides on an outer circumferential surface of the second processed body, wherein the groove machining step includes a step of bringing the grooved slide into close contact with the outer circumferential surface of the second machined structure And a second groove machining step of pressing the groove machining slide in close contact with the first machining object to form a groove on the outer circumferential surface of the second machined object.

In order to attain the above object, the apparatus for manufacturing a collar using a multi-stage molding according to the present invention is a device for manufacturing a collar using a multi-stage molding for manufacturing a hollow cylindrical collar with no thickness deviation, A drawing punch for producing a first processed object in the form of a container having a flange on the upper side and a drawing punch for pressing the flange of the first processed object to forcibly first press-fit the first processed object into a die smaller than the diameter of the container And a forming punch for protruding downward from the flange pressing portion to form a second processed body by press-fitting the first processed body pressed into the die by a predetermined depth.

And a hole processing punch for passing through the bottom of the second processed body to form a hole.

A plurality of grooved slides formed on the front surface to form a plurality of grooves by pressing the outer circumferential surface of the second processed material and having inclined surfaces inclined downwardly on the rear surface, And a groove machining slide for feeding the groove machining slide. The inclined surface of the groove machining slide has a first inclined surface for bringing the groove machining slide into close contact with the outer circumferential surface of the second machined structure, and a groove machined slide in close contact with the second machined structure And the second inclined surface for forming the groove on the outer circumferential surface of the second processed body by pressurization is constituted by multiple stages.

As described above, according to the method and apparatus for manufacturing a collar by using the multi-stage molding according to the present invention, it is possible to manufacture a collar without variations in thickness by press-fitting the workpiece to the die in multiple stages.

In addition, according to the method and apparatus for manufacturing a collar by using the multi-stage molding according to the present invention, the grooved slides for forming the grooves on the outer surface of the collar are operated in multiple stages to increase the uniformity of the grooves.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a drawing showing a drawing process during a manufacturing process of a collar using a conventional press. Fig.
2 is a flowchart showing a method of manufacturing a collar using multi-stage molding according to the present invention.
3 is a cross-sectional view of a collar manufacturing apparatus using multi-stage molding according to the present invention.
4 is a sectional view showing the operation of a drawing punch of a color production apparatus using multi-stage molding according to the present invention.
5 is a sectional view showing the operation of a flange pressing portion and a forming punch of a collar manufacturing apparatus using multi-stage molding according to the present invention.
6 is a view showing a groove machining slide of a collar manufacturing apparatus using multi-stage molding according to the present invention.
7 is a view showing a discharge portion of a collar manufacturing apparatus using multi-stage molding according to the present invention.

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

FIG. 3 is a cross-sectional view illustrating an apparatus for manufacturing a color using multi-stage molding according to the present invention, and FIG. 4 is a cross-sectional view illustrating a multi- FIG. 5 is a sectional view showing the operation of a drawing punch of a color manufacturing apparatus using the multi-stage forming apparatus according to the present invention, FIG. 5 or 6 is a sectional view showing the operation of a flange pressing unit and a forming punch, FIG. 7 is a view showing a discharge section of a color production apparatus using multi-stage molding according to the present invention. FIG. 7 is a view showing a groove processing slide of a color production apparatus using multi-stage molding according to the present invention.

FIG. 2 is a flowchart illustrating a method of manufacturing a collar using multi-stage molding according to the present invention. In the method of manufacturing a collar using a multi-stage molding for manufacturing a hollow cylindrical collar with no thickness deviation, A drawing step (S1) of producing a container-shaped first processed material having a flange formed on an upper side by pressing a plate-shaped workpiece, and a drawing step (S1) of pressing the flange of the first processed material through a flange- (S2) for forcefully pressing the first processed body to the first position and a first processed body which is pressed into the die by a predetermined depth through the first forming step (S2) through the end of the molding punch And a second shaping step (S3) of forming a second processed body by press-fitting in a second direction.

 As described above, the die can be manufactured by dividing the work to be processed (first processed body) into a first molding step (S2) and a first molding step (S2) The detailed structure and operation for this will be described in more detail below.

Further, the method may further include a hole machining step (S4) of passing a bottom portion of the second processed material through a hole processing punch to form a hole in a bottom portion of the second processed material, It is possible to manufacture a hollow collar which is completely penetrated from the upper side to the lower side in addition to the collar.

The method may further include a groove machining step (S5, S6) for forming grooves on the outer peripheral surface of the second processed body by using a plurality of grooved slides, wherein the groove machining steps (S5, S6) A second grooving step (S5) of making the slide closely contact the outer circumferential surface of the second processed member, and a second groove machining step of pressing the grooved slide adhered to the second processed member to form grooves on the outer circumferential surface of the second processed member S6). By operating the grooved slides for forming the grooves on the outer surface of the collar in multiple stages, it is possible to increase the processing uniformity of the grooves.

More specifically, when a plurality of grooved slides form grooves on the outer circumferential surface of the second processed body, the grooved slides are divided into a plurality of steps over a plurality of times without processing the second processed body at one time, And the groove machining slide is operated (groove machining) before the groove machining slide is properly brought into contact with the groove machining slide.

This is because the second grooving step (S5) in which the grooving slides are brought into close contact with the grooves of the second processed body and the second grooving step (S6) in which the grooved slides press the second processed bodies to form grooves, It is possible to increase the machining uniformity of each groove.

It is also possible to configure the groove machining slide to divide and operate the second groove machining step (S6) in which the groove is formed by pressing the second machined body.

The structure for the above groove processing steps (S5, S6) will be described in more detail below.

Fig. 3 shows a color manufacturing apparatus using the multi-stage molding according to the present invention. The workpiece 1 is sequentially transferred by a transfer device, and the upper mold 20 and the lower mold 21 are opened, And is processed into the first processed body 11 and the second processed body 12 by repetition.

More particularly, the present invention relates to an apparatus for manufacturing a collar using a multi-stage molding for manufacturing a collar in the form of a hollow cylinder without a thickness deviation, A drawing punch 13 for manufacturing a processed body 11 and a flange of the first processed body 11 are pressed to forcibly press the first processed body 11 into a die smaller than the diameter of the container The flange pressurizing portion 14 for the first processed body 11 and the flange pressing portion 14 to press the first processed body 11 press-fitted into the die by a predetermined depth by the flange pressing portion 14, And a forming punch 15 for manufacturing the processed body 12. [

The transferring and discharging of the processed body 1 and the processed first processed body 11 and the processed second processed body 12 for processing through the drawing punch 13 can be performed individually, The processed body 1, the first processed body 11, and the second processed body 12 may be configured to be connected by a single strap (not shown) and sequentially transferred.

That is, the present invention is characterized in that a configuration (drawing punch, molding punch, etc.) for each molding is arranged at predetermined intervals as in a progressive die system, and the strap, on which the workpiece is arranged at predetermined intervals, And can be processed into a configuration for each molding.

Further, according to the shape of the collar to be machined, it may be omitted in the construction for producing a cylindrical collar which is only opened on the upper side. However, when the hollow collar is formed completely through from the upper side to the lower side, 12 to form a hole through the bottom of the second processed body 12, and the bottom of the second processed body 12 is removed through the hole processing punch 16.

The hole machining punch 16 is also configured so that when the groove machining slide 18 to be described below presses the second machined structure 12 to form grooves on the outer peripheral surface of the second machined structure 12, It may be used as a groove forming guide for supporting the inner circumferential surface of the body 12.

That is, the hole machining punch 16 serves both to remove the bottom portion of the second processed body 12 and to simultaneously perform the role of the groove machining guide, and the hole machining (removal of the bottom portion) But it is also possible to provide a separate groove processing guide so that the hole processing and the groove processing are separately performed.

3 or 4, the plate-shaped workpiece 1 is pressed into the die 2a formed in the lower die by the lowering of the drawing punch 13 formed on the upper die, And is processed into the first processed body 11.

At this time, the first processed body 11 may be gradually and repeatedly processed by a plurality of drawing punches 13 and dies 2a.

5 shows the operation of the flange pressing portion and the forming punch of the collar manufacturing apparatus using the multistage molding according to the present invention. As shown in (5-I) of Fig. 5, when the flange pressing portion 14 And the first processed body 11 transferred to the lower portion of the forming punch 15 is brought into contact with the flange pressing portion 14 by the lowering of the upper mold as shown by 5 - II in Fig. 5, (14) presses the flange (11a) of the first processed body (11).

At this time, the inclined surface formed on the upper side of the die 2b causes the first processed body 11 to be deformed by a die 2b having a diameter smaller than the diameter of the first processed body 11 as shown in (5-III) And is primarily molded.

The bottom surface of the first processed body 11 comes into contact with the forming punch 15 after being pressed into the die 2b by the flange pressing portion 14 by a predetermined depth, And is processed into the second processed body 12 by the second machining (stretching) by the forming punch 15 at the same time as the press-in of the flange pressing portion 14 by the press.

As described above, the forming punch 15 does not extend the first processed body 11 from the beginning, and the flanged portion 14 presses the first processed body 11 into the die 2b by a predetermined depth first It is possible to prevent the sidewall from being thinned by the stretching process by the forming punch 15 by continuously processing the first processed body 11 after the first processing body 11 is processed.

Although the pressing by the flange pressing portion 14 and the processing by the forming punch 15 may be respectively performed on the individual dies, the forming punch 15 may be configured such that the first processed body 11 is stretched It is possible to effectively prevent the sidewall from being thinned by the flange pressurizing portion 14 continuously pressing the first processed body 11.

As shown in FIG. 3 or 6, protrusions are formed on the entire surface to form a plurality of grooves by pressing the outer peripheral surface of the second processed body 12, and inclined surfaces 18a and 18b inclined downward are formed on the rear surface, And a groove machining punch 17 which is in close contact with the inclined surfaces 18a and 18b of the groove machining slide 18 and feeds the groove machining slide 18 .

The sloped surfaces 18a and 18b of the grooved slides 18 may be formed by a single process such that the sloped surfaces 18a and 18b of the grooved slides 18 are formed by a single step, The first inclined surface 18a for bringing the slide 18 into close contact with the outer peripheral surface of the second processed body 12 and the groove processed slide 18 brought into close contact with the second processed body 12 are pressed to form the second processed body 12 The second inclined surface 18b for forming the groove on the outer circumferential surface of the second processed body 12 and the groove processed slide 18 may be formed in a multi- The uniformity of the groove can be increased.

It is also possible to simultaneously press the first inclined face 18a located on the upper side of the groove processing slide 18 and the second inclined face 18b located on the lower side to prevent the force from being concentrated on the upper side or the lower side of the grooved slide 18 The groove processing slide 18 can be transported as uniformly as possible.

7 shows the discharge portion of the collar manufacturing apparatus using the multi-stage molding according to the present invention, in which the flange end face 11b formed by the flange pressing portion (see Fig. 5) is pressed through the discharge portion 19, So that the collar 10 is separated from the processed body 12.

At this time, the second processed body 12 is protruded to the lower side of the discharge portion 19 so as to support the inner circumferential surface to prevent deformation of the collar 10 while the discharge portion 19 presses the second processed body 12 And a discharge guide (19a) inserted into the inner peripheral surface of the second processed body (12).

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art without departing from the scope of the present invention. The scope of the invention should therefore be construed in light of the claims set forth to cover many of such variations.

1: Workpiece
2: Die
3: punch
11: first processed body
12: second processed body
13: drawing punch
14: flange pressing portion
15: forming punch
16: Hole machining punch
17: Grooving punch
18: Grooving Slide

Claims (6)

A method of manufacturing a collar using a multi-stage molding for manufacturing a hollow cylindrical collar with no thickness deviation,
A drawing step of pressing a workpiece in a plate form using a drawing punch to produce a first processed object in the shape of a container having a flange on the upper side;
A first forming step of forcibly pressing the first processed material into a die smaller than the diameter of the container by pressing the flange of the first processed material through the flange pressing portion;
A second forming step of forming a second processed object by secondary press-fitting the first processed object, which is press-fitted into the die by a predetermined depth through the first forming step, into the die through the end of the forming punch;
And a groove machining step for forming grooves on the outer peripheral surface of the second processed body by using a plurality of grooved slides,
The groove processing step includes a first groove processing step of bringing the groove processing slide into close contact with the outer peripheral surface of the second processed body;
And a second groove machining step for pressing the groove machining slide in close contact with the second machined structure to form a groove on the outer circumferential surface of the second machined structure
A method of manufacturing a collar using multi - stage molding.
The method according to claim 1,
Further comprising a hole machining step of forming a hole in the bottom of the second processed body by penetrating the bottom of the second machined body with a hole machining punch
A method of manufacturing a collar using multi - stage molding.
delete 1. A collar manufacturing apparatus using multi-stage molding for manufacturing a collar of a hollow cylindrical shape with no variation in thickness,
A drawing punch for producing a first processed object in a container shape having a flange formed on an upper side by pressing a plate-shaped workpiece;
A flange pressing portion for pressing the flange of the first processed body to forcibly press the first processed body first into a die smaller than the diameter of the vessel;
A forming punch for protruding downward from the flange pressurizing portion and for press-fitting the first processed object pressed into the die by a predetermined depth to produce a second processed object;
A plurality of grooving slides formed on the front surface to form a plurality of grooves by pressing the outer circumferential surface of the second processed material and having inclined surfaces inclined downwardly on the rear surface;
And a groove machining punch which is brought into close contact with an inclined surface of the groove machining slide to feed the groove machining slide,
The inclined surface of the grooved slide is pressed against the first inclined surface for bringing the grooved slide into close contact with the outer peripheral surface of the second processed object and the grooved slide closely attached to the second processed object to form a groove on the outer peripheral surface of the second processed object And the second inclined surface is composed of multiple stages
A device for manufacturing a collar using multistage molding.
5. The method of claim 4,
And a hole processing punch for forming a hole through the bottom of the second processed body
A device for manufacturing a collar using multistage molding.
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