KR100948564B1 - Metal pipe protrusion forming apparatus and method - Google Patents

Abstract

PURPOSE: An apparatus for molding a metal cylinder protrusion and a method thereof are provided to successively increase protrusion degree of the protrusion which is formed on the metal cylinder by repeatedly striking a punch and a die and to reduce a manufacturing cost. CONSTITUTION: An apparatus(A) for molding a metal cylinder protrusion comprises a mold(100) and a molding unit(200). The metal cylinder(P) is inserted into the mold. The protrusion is formed on the side of the metal cylinder by simultaneously striking a die and a punch. A plurality of punches are included having an interval. A projection length of the punch is gradually increased along transfer direction of the metal cylinder.

Description

Metal Cylindrical Projection Forming Apparatus and Method {METAL PIPE PROTRUSION FORMING APPARATUS AND METHOD}

The present invention relates to a metal cylindrical projection forming apparatus and method, and more particularly to a metal cylindrical projection forming apparatus and method for forming a projection to project to the outer peripheral surface of the metal cylinder.

In general, the apparatus and method for forming the projection to protrude out of the metal cylinder includes die casting, injection molding and cutting.

Hereinafter, a can of a BNC connector will be described with reference to FIG. 1.

As shown in the drawing, the BNC connector 1 according to the related art includes a base 10, a can 20 (cylinder) through which the coupling protrusion 21 (protrusion) is formed and penetrated through the base 10, and the An insulator electrically connected to the can 20 and fixing the can 20 on the base 10, and an insulator inserted into the can 20 and having a center terminal 41 at the center thereof. 40).

In addition, a shield plate 50 is inserted between the base 10 and the can 20.

In addition, an insertion groove 22 is formed in the can 20 along an outer circumferential surface thereof, and a semicircular ground terminal 30 is inserted into the insertion groove 22 to fix the can 20 and the base 10. .

On the other hand, the can 20 is formed with a guide protrusion 23 for guiding the coupling direction at the lower end, and the grooves 11 and 31 corresponding to the guide protrusion 23 in the base 10 and the ground terminal 30. ) Are formed respectively.

The can 20 as described above is composed of a male plug, and the female plug 2 to which a coaxial cable is connected is coupled thereto.

In addition, the can 20 in which the coupling protrusion 21, the insertion groove 22, and the guide protrusion 23 are formed is manufactured by die casting.

However, the can 20 of the prior art has a problem that the manufacturing cost is increased because the coupling protrusion 21 is formed by die casting.

In addition, the coupling protrusion 21 formed by die casting has a problem in that a defective rate is increased due to unformed defects, flowmarks, and cracks.

The present invention has been made to solve the above-mentioned conventional problems, an object of the present invention is to form a projection protruding to the outer circumferential surface of the metal cylinder by repeated blow to reduce the manufacturing cost of metal cylindrical projection forming apparatus and method It is about.

Metal cylinder projection forming apparatus of the present invention for achieving the above object, the metal mold is formed in the receiving groove is inserted into the cylinder; And a forming part including a punch striking the inner circumferential surface of the metal cylinder, a die formed to face the punch and having a forming groove formed to support the outer circumferential surface of the metal cylinder, and driving means for driving the punch and the die. However, it is characterized in that for forming a projection on the metal cylinder by hitting the punch and the die.

The driving means may include a drive cam moving in a vertical direction, converting a vertical motion into a horizontal motion in conjunction with the drive cam, and horizontally moving the vertical motion in conjunction with the first cam and the drive cam coupled to the punch. It is preferred to include a second connecting member coupled to the die while changing in motion.

The drive cam is preferably divided into first and second drive cams so as to correspond to the first and second connection members, respectively.

On the other hand, the punch and the die is preferably provided with a return spring, respectively.

In addition, the driving means is preferably a hydraulic or pneumatic cylinder for driving the punch and the die.

In addition, the driving means is preferably connected to the punch and the die, respectively.

When the punch is viewed from above, a plurality of punches are formed at predetermined intervals, and a plurality of punches preferably increase in protruding length along a conveying direction.

On the other hand, when looking at the die from the top, the plurality of forming grooves are formed in a plurality at predetermined intervals to correspond to the plurality of punches formed, it is preferable that the plurality of forming grooves are gradually increased in the recessed depth along the conveying direction. .

In addition, when looking at the mold from the top, it is preferable that a plurality of receiving grooves are formed at predetermined intervals so as to correspond to the plurality of punches and forming grooves formed.

In addition, the molded part is preferably composed of first and second molded parts so as to form protrusions on both sides of the metal cylinder.

On the other hand, it is preferable that the first and second molding portions are arranged on the same line to simultaneously form protrusions on both sides of the metal cylinder.

In addition, it is preferable that the first molding part for forming the protrusion on one side and the second molding part for forming the protrusion on the other side are arranged in this order.

In addition, the driving cam is formed of a multi-stage cam that is formed to be stepped two or more times toward the top, the multi-stage cam is preferably increased in the horizontal movement of the punch and the die as the movement amount of the lower end in the vertical direction.

The metal cylindrical projection forming method of the present invention,

(I) inserting a metal cylinder into the receiving groove of the mold;

(II) shaping the projection by driving a shaping portion on the outer circumferential surface of the metal cylinder;

(III) transferring the metal cylinder to the next receiving groove and inserting it;

(IV) extending the protruding length by forming the protrusion again by a molding part; And

(V) repeating steps (III) to (IV) two or more times;

The forming part of steps (II) and (IV) is characterized by comprising a punch striking the inner circumferential surface of the metal cylinder, a die surrounding the outer circumferential surface, and driving means for driving the punch and the die.

According to the metal cylindrical projection forming apparatus and method according to the present invention, by forming a projection protruding to the outer circumferential surface of the metal cylinder by the repeated blow of the punch and the die has the effect of lowering the manufacturing cost.

In addition, the protrusion of the protrusions formed on the metal cylinder is sequentially increased by the repeated strike of the punch and the die.

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

Figure 2 is an exploded perspective view showing a metal cylindrical projection forming apparatus according to the present invention, Figure 3 is a side cross-sectional view showing a metal cylindrical projection forming apparatus according to the present invention, Figures 4a to 4b is a metal cylinder according to another embodiment Figure 5 is a view showing a cam of the projection forming apparatus, Figure 5 is a perspective view showing an embodiment in which the first and second molding parts of the metal cylindrical projection forming apparatus according to the invention arranged on the same line, Figure 6 is according to the present invention Fig. 7 is a perspective view showing an embodiment in which the first and second molding portions of the metal cylindrical protrusion forming apparatus are arranged in sequence, and Fig. 7 is a cross-sectional view showing a can of a BNC connector manufactured by the metal cylindrical protrusion forming apparatus according to the present invention.

As shown in Figures 2 to 6, the metal cylindrical projection forming apparatus (A) according to the present invention, the metal mold (100) and the metal cylinder (100) in which the receiving groove 101 is formed so that the metal cylinder (P) is inserted ( The molding part 200 which forms the protrusion P1 on the outer circumferential surface of P) is included.

First, the molding part 200 is a punch 210 hitting the inner circumferential surface of the metal cylinder (P), and is formed to face the punch 210 and the forming groove 221 to support the outer circumferential surface of the metal cylinder (P). The die 220 is formed and the driving means 230 for driving the punch 210 and the die 220.

The molding unit 200 configured as described above forms the protrusion P1 by the punch 210 and the die 220 hitting the metal cylinder P according to the driving of the driving means 230.

In addition, the driving means 230 is a drive cam 231 moving in the vertical direction, the first connecting member coupled to the punch 210 by converting the vertical motion into a horizontal motion in conjunction with the drive cam 231 And a second connection member 233 coupled to the die 220 to change the vertical movement to a horizontal movement in conjunction with the driving cam 231.

Accordingly, the first and second connection members 232 and 233 are moved in the horizontal direction by the vertical movement of the drive cam 231 and the punch 210 connected to the first and second connection members 232 and 233 moved in the horizontal direction. The die 220 simultaneously strikes the inner and outer circumferential surfaces of the metal cylinder P to form the protrusion P1.

As shown in FIG. 4, the drive cam 231 may be divided into first and second drive cams 231a and 231b so as to correspond to the first and second connection members 232 and 233, respectively.

Furthermore, the metal cylindrical protrusion forming apparatus A of the present invention is interposed between the upper and lower molds of the press, and the driving cam 231 is driven in association with the vertical downward movement of the press.

In addition, the drive cam 231 is driven by a motor, a hydraulic or pneumatic cylinder.

In addition, a return spring 240 may be installed at each of the punch 210 and the die 220.

And, when looking at the punch 210 from the top (see Fig. 2), a plurality of punches 210 are formed at a predetermined interval, the plurality of punches 210 formed in the direction increases toward one direction gradually It is preferably configured to.

Meanwhile, although four punches 210 are illustrated in the drawing, the punches 210 may be added or subtracted as necessary.

In addition, when the die 220 is viewed from the top (see FIG. 2), a plurality of forming grooves 221 are formed at predetermined intervals so as to correspond to the plurality of formed punches 210, and a plurality of forming grooves ( 221 may be configured to gradually increase the depth deep in one direction.

Furthermore, when the mold 100 is viewed from the top (see FIG. 2), a plurality of the receiving grooves 101 are formed at predetermined intervals to correspond to the punch 210 and the forming grooves 221 formed in plurality. .

Accordingly, the metal cylinder P moves from the first accommodating groove 101 to the last accommodating groove 101 to form the protrusion P1.

That is, each time the metal cylinder (P) is inserted into each of the receiving grooves 101, the punch 210 and the die 220 hit the metal cylinder (P), the punch toward the last receiving groove 101 ( As the protrusion length of 210 and the depth of depression of the forming groove 221 increase gradually, the protrusion P1 formed in the metal cylinder P gradually increases the protrusion length of the metal cylinder P, thereby increasing the protrusion P1 of the metal cylinder P. You're done.

On the other hand, the metal cylinder (P) is generally inserted into or away from the receiving groove 101 by an ejector pin or a guide pin (not shown), etc., the ejector pin or guide pin is a known technique used in press working Therefore, detailed description is omitted.

In addition, the upper end of the metal cylinder (P) is connected to the strip (strip) commonly used in continuous process presses are continuously formed while moving in the feed direction. Since this is also known technique, detailed description thereof will be omitted.

As shown in FIGS. 5 to 6, the molding part 200 may include first and second molding parts 200a and 200b to form protrusions P1 on both sides of the metal cylinder P. have. Since the configuration of the first and second molding parts 200a and 200b is the same as that of the molding part 200 of FIG. 2, detailed description thereof will be omitted.

In addition, the first and second molding parts are arranged on the same line to simultaneously form the protrusions P1 on both sides of the metal cylinder P as shown in FIG. 5, or the protrusions P1 on one side of the metal cylinder P as shown in FIG. 6. The first molding part 200a forming the second molding part and the second molding part 200b forming the protrusion P1 on the other side may be sequentially disposed.

On the other hand, the drive cam 231 may be formed as a multi-stage cam that is formed stepped more than two times toward the top, as shown in Figure 4b, the vertical movement of the lower end of the multi-stage cam increases the punch 210 and the die ( The amount of horizontal movement of 220 is also increased. That is, the punch 210 and the die 220 repeatedly strike.

In addition, when the driving cam 231 is formed as a multi-stage cam, it is preferable that only one forming groove 231 of the punch 210 and the die 220 is formed.

That is, the punching amount of the punch 210 and the forming groove 221 continuously increases as the lower end of the stepped drive cam 231 is moved two or more times, thereby completing the projection P1 of the metal cylinder P.

The method of shape | molding a processus | protrusion in a metal cylinder through the metal cylinder protrusion forming apparatus A comprised as mentioned above is demonstrated.

First, a metal cylinder P is inserted into the receiving groove 101 of the mold 100 (I).

Next, the projection P1 is formed on the outer circumferential surface of the metal cylinder P by the driving of the molding part 200 (II).

Then, the metal cylinder (P) having a part of the projection (P1) is transferred to the next receiving groove 101 and inserted (III).

Next, the protrusion P1 is molded again by the molding part 200 to extend the protruding length (IV).

Then, repeating the above (III) to (IV) two or more times to complete the projection (P1) (V).

That is, the molding of the projection P1 is completed on one side of the outer circumferential surface of the metal cylinder P.

Next, the protrusions P1 are formed on the other side of the outer circumferential surface of the metal cylinder P by repeating the above (I) to (V).

Hereinafter, the can of the BNC connector manufactured by the metal cylindrical protrusion forming apparatus A and the method will be briefly described.

As shown in FIG. 7, the can 300 of the BNC connector includes a cylinder 301, a coupling protrusion 302 formed in the vertical direction of the outer circumferential surface of the cylinder 301, and a binding formed at a lower end of the cylinder 301. It is composed of a sphere 303.

At this time, the coupling protrusion 302 is formed by the metal mold 100 and the molding portion 200 of the above-described metal cylindrical protrusion forming apparatus (A), more specifically, the punch 210 and the die 220 of the It is formed by the repeated blow of the forming groove 221.

As mentioned above, although preferred embodiment of this invention was described in detail, the technical scope of this invention is not limited to the above-mentioned embodiment, It should be interpreted by the claim. At this time, those of ordinary skill in the art should consider that many modifications and variations are possible without departing from the scope of the present invention.

For example, the driving means 230 may be configured as a hydraulic or pneumatic cylinder for driving the punch 210 and the die 220.

1 is an exploded perspective view showing a conventional BNC connector.

Figure 2 is an exploded perspective view showing a metal cylindrical projection forming apparatus according to the present invention.

Figure 3 is a side cross-sectional view showing a metal cylindrical projection forming apparatus according to the present invention.

Figures 4a to 4b is a view showing a cam of the metal cylindrical projection forming apparatus according to another embodiment.

5 is a perspective view showing an embodiment in which the first and second molding parts of the metal cylindrical protrusion forming apparatus according to the present invention are arranged on the same line.

6 is a perspective view showing an embodiment in which the first and second molding portions of the metal cylindrical protrusion forming apparatus according to the present invention are arranged in sequence.

7 is a cross-sectional view showing a can of a BNC connector manufactured by a metal cylindrical protrusion forming apparatus according to the present invention.

* Description of symbols on main parts of the drawings *

A-Metal Cylindrical Forming Machine P-Metal Cylindrical

P1-protrusion 100-mold

101-receiving groove 200-forming part

210-Punch 220-Die

221-forming groove 230-driving means

231-Drive cam 232-First connection member

233-second connection member 240-return spring

300-Can 301-Cylinder

302-Coupling 303-Binding Sphere

Claims (14)

A mold in which a receiving groove is formed to be inserted while being transported with the metal cylinder; A molding part including a punch striking the inner circumferential surface of the metal cylinder, a die installed to face the punch and forming a molding groove to support the outer circumferential surface of the metal cylinder, and driving means for simultaneously driving the punch and the die; , By forming a projection on the side of the metal cylinder by the simultaneous strike of the punch and the die, And a plurality of punches are formed at predetermined intervals, and the plurality of punches are formed such that the protruding length is gradually increased along the conveying direction of the metal cylinder. The method of claim 1, The drive means, A drive cam moving in a vertical direction, A first connection member coupled to the punch by converting a vertical motion into a horizontal motion in conjunction with the driving cam; And a second connecting member coupled to the die while changing a vertical motion in a horizontal motion in conjunction with the drive cam. The method of claim 2, The drive cam is formed of a metal cylindrical projection forming apparatus, characterized in that divided into first and second drive cams to correspond to the first and second connection members, respectively. The method of claim 3, wherein The punch and die is a metal cylindrical projection forming apparatus, characterized in that the return spring is installed respectively. The method of claim 2, The drive cam is a metal cylindrical projection forming apparatus, characterized in that driven by a motor or a hydraulic or pneumatic cylinder. The method of claim 5, And said driving means is connected to said punch and die, respectively. delete The method according to any one of claims 1 to 6, When the die is viewed from above, a plurality of forming grooves are formed at predetermined intervals to correspond to a plurality of formed punches, and the plurality of forming grooves have a recessed depth along a conveying direction. Cylindrical protrusion forming device. The method of claim 8, When the mold is viewed from the top, the receiving groove is formed of a plurality of metal cylindrical projections, characterized in that formed in a plurality at a predetermined interval corresponding to the punch and the forming groove formed. The method according to any one of claims 1 to 6, The molding unit, The metal cylindrical projection forming apparatus, characterized in that it is composed of first and second molding parts to form projections on both sides of the metal cylinder. The method of claim 10, And the first and second molding portions are arranged on the same line to simultaneously form protrusions on both sides of the metal cylinder. The method of claim 10, A metal cylindrical protrusion forming apparatus, wherein the first molding portion forming the protrusion on one side and the second molding portion forming the protrusion on the other side are arranged in this order. The method according to any one of claims 2 to 4, The driving cam is formed of a multi-stage cam which is formed to be stepped two or more times toward the upper end, wherein the multi-stage cam has a horizontal movement amount of the punch and die as the bottom movement amount increases in the vertical direction. Protrusion forming device. (I) inserting a metal cylinder into the receiving groove of the mold; (II) shaping the projection by driving a shaping portion on the outer circumferential surface of the metal cylinder; (III) transferring the metal cylinder to the next receiving groove and inserting it; (IV) extending the protruding length by forming the protrusion again by a molding part; And (V) repeating steps (III) to (IV) two or more times; Including but not limited to: In order to perform step (V), the forming part includes a punch striking the inner circumferential surface of the metal cylinder, and a die provided to face the punch and formed with a forming groove to support the outer circumferential surface of the metal cylinder, A plurality of punches are formed at predetermined intervals, and a plurality of punches are formed so that the protruding length gradually increases along the conveying direction of the metal cylinder. As the metal cylinder is transferred, projections formed on the side of the metal cylinder are gradually formed. Metal cylindrical projection forming method characterized in that formed to be long.

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