KR20050013885A - manufacture method of pipe-type electrode for power plug - Google Patents

Abstract

PURPOSE: A method of fabricating a pipe-shape electrode bar for a power plug is provided to use a brass round-bar type of a molding chip as molding materials and adopt a drawing process and a reducing process by a cold forging machine or a press, thereby decreasing manufacturing costs, improve productivity and making a hemisphere-shape nose of cam molded easily. CONSTITUTION: A round-bar type of a molding chip is molded into half-finished goods of a pipe-shape electrode tube(PM) by a cold forging machine or a press where a forming block is set. The molding chip is gradually lengthened and thinned from a low and thick cup shape through at least three impact manufacturing processes and reducing manufacturing processes. A plurality of molding grooves(D35d), a punch(H35-40) and an ejector(EJ) are installed by stages at the forming block. A hemisphere-shape nose of cam is formed at one side of the pipe-shape electrode tube. The other side of the pipe-shape electrode tube is opened.

Description

Manufacturing method of pipe-type electrode for power plugs {manufacture method of pipe-type electrode for power plug}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method for manufacturing a power plug electrode, and in particular, a die drawing, which is a cold working method, for producing a rod-shaped electrode for 200-250V mainly from a power plug electrode as a material. The present invention relates to a method for manufacturing a pipe-shaped electrode rod by) and reducing processing.

Among the types of power plugs, power plugs for 200-250V have various types of electrodes depending on the method of manufacture or use of the power plug, but the most commonly used configurations are prefabricated and molded.

1 to 2 illustrate a configuration of an example of a prefabricated power plug 30 used by a user connecting wires.

This configuration consists of a triangular power plug main body 31 (31a), which is separated into two upper and lower sides and assembled by an assembly screw 33, and an electrode rod holder 32 that is fitted under pressure between the main body 31 and 31a. ) And two rod-shaped electrodes 35 supported by the electrode holders 32.

The two rod-shaped electrode rods 35 have a circular columnar shape, and the front portion having the hemispherical tip portion 35a is exposed to the front side of the main bodies 31 and 31a, and the rear portion is supported by the fixing base 32. Wire connector (35b) is formed to a certain depth by inserting the wire 34 in the fixed portion, the screw hole 36 is formed on the side end of the wire connector (35b) is a configuration that the fixing screw 37 for pressing and fixing the wire is installed to be.

3 shows a configuration of an example molded power plug 40 in which an electric wire and a power plug body are integrated.

In this configuration, the two rod-shaped electrode rods 45 having the hemispherical tip portion 45a have a fixing cylinder 45c and a fixing frame 45d, each of which is tapered from the middle, and are fixed integrally by the mold fixing member 42. In addition, the mold-type fixing member 42 is connected to the molded power plug main body 41 in a triangular form while the wire 44 is crimped and connected to the wire connector 45b formed at the rear end of each of the two rod-shaped electrode rods 45. It is an integrated structure.

The rod-shaped electrode 45 is composed of a front member having a hemispherical tip portion 45a and a rear member having a wire connector 45b to which the wire 44 is press-connected, and a part of the front member is a mold-type fixing member 42. The fixed cylinder 45c, which has a narrow diameter since the middle, and a fixed frame 45d are provided on the rear outer peripheral surface of the fixed cylinder 45c.

Looking at the configuration of the two kinds of rod-shaped electrode rods 35, 45 used in the general 200-250V power plugs as described above, the rear end is a wire connector (35b) for fitting the wires (34, 44) fixed 45b is formed, or has a variety of forms according to the form and manufacturing method, such as a screw hole 36 for tightening the fixing screw 37, and in common in the configuration of the electrode tip (35a) ( 45a) is shaped like a hemispherical or hemispherical shape so that it can be easily inserted into the power hole of the 200-250V outlet, and consists of a brass round bar having a predetermined diameter and a predetermined length.

The conventional method of manufacturing the rod-shaped electrode rods 35 and 45 for the conventional 200-250V is made of a brass round bar of an appropriate diameter as a material, using a cutting machine, such as a lathe, to a predetermined electrode diameter and overall length. A first cutting process for cutting, followed by a second cutting process for cutting the hemispherical tip portions 35a and 45a, and then a connecting member of a predetermined type for electrical connection with the wires 34 and 44 at the rear end. The rod-shaped electrode rods are formed by a third process such as molding predetermined wire connectors 35b and 45b by a boring or crimping process, or by machining a screw hole 36 for the set screw 37 on the side. After molding the entire form of (35) (45), it is produced by a method of finally completing by plating nickel on the surface of the produced electrode.

Further, in addition to the general manufacturing method, another manufacturing method for an electrode rod for a special use, which has improved durability and functionality, includes a die casting method using a die casting mold and a die forging method using a die forging die.

As described above, various manufacturing methods of the rod-shaped electrode rods provided so far have advantages and disadvantages for each manufacturing method. However, most rod-type electrode rods except for special purpose electrode rods are made of brass rods, and the cutting process is performed several times. It is produced by the manufacturing method described below.

However, the conventional method of manufacturing a rod-type electrode for a power plug using the brass bar as a molding material and several cutting processes as a main process includes material loss due to cutting, and the entire electrode bar is made of brass, so the material cost is high, and the production speed is slow. Due to the insufficient mass productivity, the manufacturing cost was high.

As the invention to solve the disadvantages of the conventional rod-shaped electrode manufacturing method using the above-described brass rod as a molding material and several cutting processes as the main process, the present invention by the applicant for the power plug in Korean Patent Application No. 10-2002-0023913 A method of manufacturing a rod-shaped electrode rod and a mold apparatus (hereinafter referred to as line invention) have been previously filed.

Said line invention is a drawing method by press using a brass pipe as a molding material in manufacturing a rod-shaped electrode rod for power plug, and has a hemispherical tip portion P35a (P45a) as shown in Figs. The hollow pipe-type electrodes (P35) (P45) can be manufactured to reduce the material loss and the weight ratio per unit volume, thereby reducing the material cost as compared to the rod-shaped electrodes (35) (45) manufactured by cutting the conventional round bar. It can be drastically lowered by about 2 degrees.

However, the above-described invention requires at least two or more steps of drawing process in order to mold the brass pipe, which is a molding material, to a smooth semi-spherical shape by drawing, and the surface of the hemispherical tip P35a (P45a) as a finished product is required. In order to complete the smooth form, additional processes such as a pressing process, a spot welding process, and a lapping process are required separately, resulting in low manufacturing cost reduction overall.

The present invention eliminates the disadvantages of the conventional manufacturing method of the rod-type electrode rod for power plug, which is made of the brass round bar as the main material and several cutting processes as the main process, and also the brass pipe as the molding material and the press drawing method. In order to solve some of the shortcomings of the method of manufacturing the pipe-type electrode for the power plug of the prior invention for manufacturing the pipe-type electrode, the unit price of brass, which is the main material in the production of the rod-shaped electrode for the power plug, rather than the cost per unit weight In consideration of the fact that the round bar is about half, the pipe is made by drawing and reducing processing by cold forging machine (aka former) or press by using brass round bar shaping chip instead of brass pipe. It is characterized in that the electrode can be manufactured, further reducing the material cost and It is an object of the present invention to provide a method of manufacturing a pipe-type electrode rod for a power plug that can reduce manufacturing costs, lower manufacturing costs, increase productivity, and facilitate molding of a hemispherical tip.

1 is a cross-sectional view of an example power plug to which the present invention is applied

Figure 2 is an exploded perspective view of a rod-shaped electrode of an example power plug to which the present invention is applied

3 is a cross-sectional view of an example molded power plug to which the present invention is applied

Figure 4 is a cross-sectional view of an example prefabricated power plug-type electrode to be molded by the present invention

Figure 5 is a cross-sectional view of a pipe-type electrode for an example molded power plug to be molded according to the present invention

Figure 6 is a cross-sectional view of a semi-finished pipe-type electrode tube molded by an embodiment manufacturing method according to the present invention.

7 is an enlarged rear view of the configuration of the semifinished pipe electrode tube of 6 degrees;

8 is a block diagram of a molding chip used in the manufacturing method of the present invention

9 to 14 is an overall process diagram of a manufacturing method of the first embodiment of the present invention for producing a pipe-type electrode for an example prefabricated power plug

15 is a process chart for the corner shaping of the molding chip used in the present invention

Figure 16 is a one-step preliminary impact process performed in various embodiments of the present invention manufacturing method

Figure 17 is a two-stage preliminary impact process diagram carried out in various embodiments manufacturing method of the present invention

18 is a front end shaping process performed in various embodiments of the present invention.

19 is a one-step impact process diagram in the manufacturing method of the second embodiment of the present invention

20 is a two-step impact process diagram in the manufacturing method of the second embodiment of the present invention

21 is a three-step drawing process diagram in the manufacturing method of the third embodiment of the present invention

22 is a one-step reduced drawing process diagram in a manufacturing method of a fourth embodiment of the present invention;

FIG. 23 is a two-step drawing process drawing in the manufacturing method of the fourth embodiment of the present invention. FIG.

24 is a three-stage compressed drawing process diagram in the manufacturing method of the fourth embodiment of the present invention

(Short description of symbols for the main parts of the drawing)

30: Assembly power plug 31, 31a: Power plug body 32: Electrode rod holder

33: Assembly screw 34: Wire 35: Rod type electrode 35a: Hemispherical tip

35b: Cable connector 36: Thread hole 37: Fixing screw

40: Molded power plug 41: Molded power plug body

42: molded electrode rod fixing member 45: molded electrode rod

45a: Molded electrode end portion 45b: Molded electrode wire connector

45c: Molded electrode rod 45d: Molded electrode rod

P35: Pipe-type electrode rod for assembled power plug P35a: Hemispherical tip

P35b: Cable connector P35c: Inner ring P35d: Screwdriver P35e: Connector

D: Diameter of electrode D1: Diameter of fixing cylinder D2: Outer diameter of electrode connector

L: Length of electrode straight part t1: Thickness of straight part of electrode middle member

t2: thickness of hemispherical tip t3: thickness of connector

P45: Pipe type electrode for molded power plug P45a: Hemispherical tip

P45b: Cable connector P45c: Fixed cylinder P45d: Fixed wheel

P45e: Connector La: Electrode tube straight part length Lx: Electrode bar (P45) Straight part length

PM: Semi-finished pipe electrode tube PMa: Hemispherical tip PMb: Connector

PMc: Middle member Da: Diameter of pipe type electrode tube Db: Internal diameter of pipe type electrode tube

Dc: diameter of connector La: length of straight portion of electrode tube ta: thickness of intermediate member of electrode tube

tb: thickness of hemispherical tip tc: thickness of connector

M: Molding chip MD: Diameter of molding chip ML: Length of molding chip M1: Molding chip

P35-10: First Embodiment Molding Chip Setting Diagram

P35-15: Example 1 Step 1 Impact Flow Chart

D35-10: First Embodiment First Forming Block D35a: First Embodiment First Step Molding Groove

H35-10: First Embodiment Step 1 Punch M1-10: Step 1 Chip Mold EJ: Ejector

P35-20: Example 1 Step 2 Molding Setting Diagram

P35-25: Example 1 Step 2 Impact Process Diagram D35b: Example 1 Step 2 Forming Groove

H35-20: First Embodiment Second Stage Punch M1-20: Pipe Type Two Stage Chip Form

P35-30: First Example Three-Step Mold Setting Diagram

P35-35: First Example Three-Step Impact Process Diagram D35c: First Example Three-Step Molding Groove

H35-30: First embodiment three-stage punch M1-30: Pipe-type three-stage chip molding

P35-40: Fourth Embodiment Molding Setting Diagram

P35-45: Example 4 Step-Reducing Process

D35d: Fourth Embodiment Reducing Molding Groove D35h: Stepped Wheel

D35j: Internal forming groove H35-40: First embodiment Step 4 reducing punch

P35-50: Example 1 Step 5 Molding Setting Diagram

P35-55: First Embodiment Five-Step Crimping Process D35-50: First Embodiment Secondary Die

D35f: Supporting groove H35-60: Crimp base rod H35-65: Crimp punch

PM1: Semi-finished pipe type electrode tube P35-60: Example 1 Step 6 Molding setting diagram

P35-65: First Embodiment Sixth Step Piercing Process Diagram D35-60: First Embodiment Third Die

D35g: Supporting groove H35-60: Piercing support rod H35-65: Piercing punch

PM2: Semifinished Pipe Type Electrode Tube

P35-5: Molding chip edge shaping P35-5a: Molding chip edge shaping

D35-5: Left and right molding chips Orthopedic block die D35r: Orthopedic forming groove

P35-7: 1 stage preliminary impact setting diagram P35-7a: 1 stage preliminary impact setting diagram

D35s: 1 stage preform groove H35-7: 1 stage prepunch

M1-10: Cup type 1st stage chip molding P35-16: 2nd stage preliminary setting diagram

P35-17: Two-stage preliminary impact chart H35-17: Two-stage preliminary punch

D35t: Two-stage preform groove M1-17: Two-stage preform

P35-70: 7-Step Orthopedic Drawing P35-75: 7-Step Orthopedic Drawing

H35-70: 7-stage impact punch D35-70: 7-stage orthodontic die

D35p: 7-stage impact forming groove D35m: Hemisphere forming groove

P35-10a: Second Example 1-Step Molding Chip Setting Diagram

P35-15a: Example 2 Step 1 Impact Process

M2: Molding chip M2-10: Semi-conical step 1 chip molding according to the second embodiment

P35-20a: Second Example Molding Chip Setting Diagram

P35-25a: Two-Step Impact Process Diagram D35-10a: Second Embodiment Forming Block

D35a-1: forming groove H35-10a: second embodiment punching step 1

M2-20: Second Embodiment Semiconical Two-Stage Chip Molding

P35-20a: Second Example Molding Chip Setting Diagram

P35-25a: 2-stage impact flow chart D35b-1: Molding groove

H35-20a: Second Example Punch

M3-20: Third embodiment Pipe type two-stage chip molding G1: Guide piece

P35-30b: Third Example 3 Step Molding Chip Setting Diagram

P35-35b: Third Embodiment Reducing Process Diagram

D35-30c: Third Embodiment Step 3 Forming Block Dh1: Reducing Molding Groove

H35-30c: Third Example 3 Step Reducing Punch

M3-30: Third embodiment Pipe-type three-stage chip molding G2: Guide piece

P45-50: Fourth Example Step 1 Reduced Drawing Setting Diagram

P45-55: Fourth Example Step 1 Reduced Drawing Process Diagram

D45-50: Fourth Embodiment Step 1 Reducing Drawing Die D45a: Fixing Groove

H45-50: Fourth Embodiment Step 1 Reduced Drawing Punch R45a: Cylindrical Punch Groove

H45-51: Support rod PM2: Semi-finished pipe type electrode tube PM4e: Conical tube

P45-60: Fourth Example Step 2 Reduced Drawing Setting Diagram

P45-65: Fourth Example Step 2 Reduced Drawing Process Diagram

D45-60: Fourth Embodiment Step 2 Reduction Drawing Die D45b: Fixed Groove

H45-60: Fourth Embodiment Step 2 Reduced Drawing Punch R45b: Cylindrical Punch Groove

H45-61: Support rod PM3: Semi-finished pipe type electrode tube P45e: Straight step

P45-70: Fourth Embodiment Compression Drawing Setting Diagram

P45-75: Fourth Example Three-Step Compression Drawing Process Diagram

D45-70: Fourth Embodiment Three-Step Compression Drawing Die D45c: Fixed Groove

D45-75: Fourth Embodiment Step 3 Compression Drawing Intermediate Die D45d: Supporting Groove

D45e: annular expansion portion H45-70: fourth embodiment compression drawing punch

R45c: Punch groove H45-71: Supporting rod D45f: Annular extension

Pipe-type electrode rod manufacturing method of the present invention for achieving the above object,

As a molding material, a round bar shaped chip having a predetermined diameter and length having an appropriate volume required for molding a pipe-shaped electrode rod for power plug of an arbitrary size,

In the cold forging machine or the press, a forming block in which several dies, punches, and ejectors are integrally formed in a drawing process and a reducing process is installed in a cold forging machine or a press.

The round bar-shaped molding chip is characterized in that it is formed in a semi-finished pipe-type electrode tube having a predetermined length and a hemispherical front end portion, and the other side is formed in a cup type having a low height and a thick thickness and gradually being long and thin.

In the configuration of the present invention, a small diameter mold member is fixed in a compression drawing process by a cold forging machine or a press with respect to the intermediate member of the molded semi-finished pipe electrode tube after the forming process of the pipe electrode tube for power plug. It can further comprise the process of shaping | molding to a cylinder.

In addition, in the configuration of the present invention, a molding process for forming a small diameter mold member fixing cylinder at the rear end of the intermediate member of the pipe-type electrode tube for power plug is followed by a drawing process by a cold forging machine or a press. It can be configured to further include the step of forming an annular fixed ring protruding outward to the rear end.

The round bar molding chip, which is the molding material of the present invention, is a chip-shaped material obtained by cutting a long rod-shaped raw material brass bar having a predetermined cross-sectional diameter corresponding to the regular rating of a rod-shaped electrode rod to be manufactured. do.

In carrying out the manufacturing method of the pipe-type electrode rod for the power plug of the present invention, preferably, the brass rod bar forming chip, which is a molding material, is cut to a suitable length from a long roll-shaped brass rod, which is automatically formed in a cold forging machine or a press. The step of supplying and the edge trimming process of rounding the circumferential edges of both end surfaces with respect to the cut brass round bar forming chip can be performed.

In the step of producing a pipe-shaped electrode tube for completing the pipe-shaped electrode rod for power plug of the present invention, the additional step of shaping the tip portion in a semi-circular shape with respect to the first molded semi-finished pipe-type electrode tube Can be carried out.

Hereinafter, a method for manufacturing a pipe type electrode rod for a power plug according to the present invention will be described in detail with reference to the following embodiments.

Figure 4 provides an example prefabricated power plug pipe to be molded by the various embodiments of the present invention, which can be used to replace the rod-shaped electrode rod 35 for the conventional example prefabricated power plug 30 described above. The configuration of the type electrode P35 is shown.

The pipe assembly electrode P35 for the prefabricated power plug of the above example has a diameter D of the front member formed of the outlet insertion member as compared with the conventional rod-shaped electrode rod 35 for the prefabricated plug, and has a straight portion. The length L is about 29.6 mm, the same, and the thickness t1 of the straight portion is about 0.2 mm in pipe form.

The hemispherical tip portion P35a has a diameter of 4.8 mm and a thickness t2 of about 1.0 to 2.2 mm, which is the same as the diameter of the conventional hemispherical tip portion 35a, and the straight portion goes to the tip portion to obtain a proper subtraction gradient required by the mold. Have

The rear end is opened by the configuration of the wire connector P35b for inserting and connecting the wire 34 therein, and the outer ring is formed of a connector pipe P35e having a short length of about 5 mm, and thus has a thickness t3 of about 0.4 to 0.5mm and the diameter (D2) is formed of about 5.2mm ~ 5.4mm, and one side end is provided with a screw hole (P35d) for screwing the fixing screw 37, the inner side of the connecting pipe (P35e) Is a configuration in which the inner ring P35c pressed to a predetermined depth is formed.

5 is provided for the use of the rod-shaped electrode rod 45 for the conventional example of the mold-type power plug 40 described above, for example molded-type power plug to be molded by various embodiments of the present invention The configuration of the pipe electrode P45 is shown.

The structure of the pipe-type electrode rod P45 for a mold-type power plug of the above example is the same in appearance compared to the rod-shaped electrode rod 45 for a conventional mold-type power plug 40, and the overall length is the hemisphere of the hemispherical tip portion P45a. The elongated straight part length Lx adds up to about 32 mm and is the same pipe shape.

The diameter of the hemispherical tip portion P45a is 4.8 mm equal to the diameter D1 of the straight portion, and the fixing cylinder P45c, which is an intermediate member for integrally molding with the mold-type fixing member 42, has a diameter D1 of about 2.8 mm. The rear end is formed of a connecting pipe (P45e) opened by a wire connector (P45b) for inserting and connecting the wire (34) inside, the inside of the fixed ring (P45d) in a configuration corresponding to the fixed frame (45d) Formed configuration.

The thickness t2 of the hemispherical tip portion P45a is about 1.0 to 2.2 mm, and the thickness t1 of the straight portion and the fixed cylinder P45c is about 0.2 mm, which is the same as the pipe-type electrode rod P35 for the prefabricated power plug. Do.

6 and 7 illustrate a configuration of a semi-finished pipe electrode tube PM formed by a manufacturing process of various embodiments of the present invention described below.

In the configuration of the semi-finished pipe electrode tube PM, reference numeral PMa denotes a hemispherical tip, reference numeral PMb denotes a connecting tube of the rear end, reference numeral PMc denotes an intermediate member that is a straight portion, and reference numeral Da denotes an electrode tube including a tip. An outer diameter of the front part is indicated, symbol Db denotes an inner diameter of the electrode tube, symbol Dc denotes an outer diameter of the connecting tube PMb formed at the rear end of the electrode tube, and symbol La denotes a half-spherical end of the hemispherical tip PMa. The length of the straight line intermediate member (PMc) of the electrode tube, except for the symbol ta indicates the thickness of the circular column intermediate member (PMc), the sign tb is the thickness of the hemispherical tip (PMa), and the sign tc is the connecting tube ( The thickness of PMb) is displayed.

The semi-finished pipe-shaped electrode tube PM is used as an intermediate member for forming the above-described pipe-shaped electrode rods P35 and P45, and the wire electrode or mold fixing member at the rear end is formed by the electrode for the plug. Electrodes that are not needed are also used as a finished product.

In various embodiments of the semi-finished piped electrode tube PM described below, the shape of the straight portion is formed with the subtraction gradient required in the mold as it goes to the tip.

FIG. 8 illustrates a configuration of a brass rod molding chip M, which is a molding material used when manufacturing the pipe-shaped electrode rods P35 and P45 by various embodiments of the present disclosure. The symbol MD denotes the diameter of the molded chip, and the symbol ML denotes the length of the molded chip.

9 to 14 show a process diagram of a method for manufacturing a pipe type electrode rod of a first embodiment of the present invention for manufacturing a pipe type electrode rod P35 for a prefabricated power plug of the above example.

The first embodiment of the pipe-shaped electrode manufacturing method of the present invention is the same as the diameter Da of the semi-finished pipe-shaped electrode tube (PM) of the predetermined standard as shown in Figure 6 for manufacturing the pipe-shaped electrode (P35) of the example Or having a larger diameter, an example of a suitable length of the brass material forming chip (M1) corresponding to the material volume of the semi-finished pipe electrode tube (PM) is used as a molding material.

An example of a semi-finished pipe electrode tube PM to be molded, the diameter Da of the intermediate member PMc is 4.8mm, the thickness ta is 0.2mm and the length La is about 29.6mm, The rear end connector (PMb) has a thickness of about 0.4 mm, a diameter of 5.2 mm and a length of 5 mm, and the thickness (tb) of the hemispherical tip (PMa) is about 2.0 mm. Since the material volume is about 134mm3,

For example, the size of the molding chip M1 is about 6.3 mm in diameter MD, while the volume is about 134 mm 3 corresponding to the material volume of the pipe electrode P35. Use the standard mm.

One example of the specification is a forming chip (M1) is a cold forming horizontal row battering type or vertical rowing type forming block mounted on a cold forging machine (former) (several punches are battered in one body) Cold forging block set consisting of a punch block installed and several stage dies are formed into a single body of the die block installed in a single body automatically, so that it can be stepped by a transfer such as a hanger With the transfer setting on the four batter dies and the punch luxury, it is molded into an example semi-finished pipe-type electrode tube PM by the following stepwise successive series of impact processes or drawing processes and reducing processes.

As an example of the above specification, the forming chip M1 is formed using a forming chip hanger (not shown) in a former as shown in the first-stage forming chip setting diagram (P35-10) of FIG. 9. It is set between the first stage punch (H35-10) and the first stage forming groove (D35a) of 10).

The first step forming groove (D35a) is formed in a cylindrical shape of a predetermined diameter and a predetermined length having an appropriate insertion gap that can be inserted in the longitudinal direction the example shaping chip (M1) of the 5.2mm,

The first stage punch (H35-10) is composed of a cylindrical rod of about 3.4mm in diameter and a standard length longer than the length of the first stage forming groove (D35a), the middle of the first stage forming groove (D35a) The stroke is set to impact to depth.

When the one-step impact processing of the example molding chip M1 is performed in one step as shown in the one-step impact process diagram P35-15 of FIG. 9 by the one-step molding groove D35a and the punch H35-10, the outer diameter is 5.2 mm. And the height of the cup-shaped one-step chip molding (M1-10) higher than 6.3mm is formed.

Cup-shaped one-step chip molding (M1-10) formed by the above process is discharged to the outside of the molding groove (D35a) by the ejector (EJ) provided at the rear end of the first-step molding groove (D35a), the cup-shaped one-step The chip molding (M1-10) is formed by the molding chip hanger (not shown), as shown in the two-step molding setting diagram (P35-20) of FIG. 10 to form the two-step molding groove (D35b) and the two-step punch (H35-20). Settled in between.

The two-stage forming groove (D35b) is only longer than the length of the first-stage forming groove (D35a) and the diameter is the same, the second stage punch (H35-20) the length is constant than the length of the first stage punch (H35-10) It is a cylindrical rod with a long length and a diameter of about 3.6 mm and is set to a stroke that is impacted to the depth of 2/3 of the two-stage forming groove D35a.

When the cup-shaped one-step chip molding (M1-10) set in the two-step molding groove (D35b) of the above configuration is subjected to two-step impact processing as shown in the two-step impact process diagram (P35-25) of FIG. 10, the outer diameter is 5.2 mm. The pipe-shaped two-stage chip molding (M1-20) is formed to be thinner by about a certain length in length and about 0.8 mm in thickness.

Pipe-shaped two-stage chip molding (M1-20) formed by the above process is discharged to the outside of the forming groove by the ejector (EJ) provided at the rear end of the two-stage forming groove (D35b), the pipe-type two-stage chip discharged The molding M1-20 is formed between the three-step molding groove D35c and the three-step punch H35-30 by the molding chip hanger (not shown) as shown in the three-step molding setting diagram P35-30 of FIG. 11. Seating is set.

The three-stage shaping groove (D35c) is longer than the length of the two-stage shaping groove (D35b) and the diameter is the same, the inner end of the shaping groove in the diameter of the hemispherical tip (PMa) of the semi-finished pipe-type electrode tube (PM) Formed in about the same hemispherical shape,

The three-stage punch (H35-30) is a length longer than the length of the two-stage punch (H35-20) and the diameter is up to about 4.4mm, the shape of the end portion is composed of an appropriate oval or hemispherical, 3 The stroke is set to an impact to a depth approaching the inner end of the step forming groove D35a to about 2 mm.

When the pipe-type two-stage chip molding (M1-20) set in the three-stage molding groove (D35c) of the above configuration is processed in three stages as shown in the three-stage impact process diagram (P35-35) of FIG. 11, the two-stage chip moldings Compared to (M1-20), the outer diameter is the same 5.2mm and the thickness is thinner, about 0.4mm, and the length of the pipe-shaped three-stage chip molding (M1-30) is about half the length of the semi-finished pipe electrode tube (PM). ) Is molded.

Pipe-shaped three-stage chip molding (M1-30) formed by the process is discharged to the outside of the forming groove by the ejector (EJ) provided at the rear end of the three-stage forming groove (D35c), pipe-type three-stage chip discharged The molding (M1-30) is a four-stage reducing forming groove (D35d) and a four-stage reducing punch (H35-40) as shown in the four-step molding setting diagram (P35-40) of FIG. 12 by a molding chip hanger (not shown). It is set in between.

The size of the four-stage reducing forming groove D35d is the same as that of the connecting tube PMb formed at the rear end of the semi-finished pipe electrode tube PM to be molded, and the diameter is 5.2 mm. While the same as, inside the stepped wheel (D35h) having an inner diameter of 4.8mm equal to the outer diameter of the intermediate member (PMc) of the semi-finished pipe-shaped electrode tube (PM) to be molded,

The inside of the stepped wheel (D35h) is formed with a cylindrical shape of the inner diameter of 5.2mm again and the end is formed with an inner forming groove (D35j) formed in a nearly hemispherical shape.

The four-stage reducing punch (H35-40) has an outer diameter of 4.4mm, the length is formed in a configuration slightly longer than the length of the semi-finished pipe electrode tube (PM), the inside of the four-stage reducing forming groove (D35d) The length of the operation stroke of the semi-finished pipe-shaped electrode tube (PM) is formed in a configuration formed corresponding to the length except for about 2mm, the thickness of the hemispherical tip portion (PMa).

When the pipe-type three-stage chip molding (M1-30) set at the four-stage molding position of the configuration is processed in a four-stage reducing process as shown in the four-stage reducing process diagram (P35-45) of FIG.

Four-stage reducing punch (H35-40) with a diameter of 4.4 mm is inserted into the pipe-shaped three-stage chip molding (M1-30), which is partially inserted into the tip of the four-stage forming groove (D35d), and has an inner diameter of 4.8. The pipe-shaped three-stage chip molding (M1-30) is pushed toward the inner forming groove (D35j), which is the starting point of the stepped wheel (D35h), which is mm, to reduce the diameter to the inner diameter of the stepped wheel (D35h), thereby increasing the length. Dosing processing is performed.

According to the reducing process described above, the tip portion PMa is formed in a substantially hemispherical shape in the form of the end portion of the inner forming groove D35j, and the diameter Da of the straight middle member PMc is 4.8 mm and the thickness ta ) Is about 0.2mm thin, and the hemispherical tip (PMa) has a thickness (tb) of about 2.0mm, the rear end has a thickness (tc) of 0.4mm, a diameter (Dc) of 5.2mm and a length of 5mmm. The end connection pipe PMb is formed to form a predetermined semifinished pipe electrode tube PM.

When the reducing process as described above is completed, the molded semi-finished pipe-type electrode tube (PM) is discharged to the outside of the support groove (D35f) by the ejector (EJ) provided at the rear end of the four-step internal forming groove (D35j). do.

An example semi-finished pipe electrode tube PM formed by the above series of processes is partially opened by a molding hanger (not shown), as shown in the 5-step molding setting diagram (P35-50) of FIG. 13. In a state in which the body portion is seated in the support groove D35f of the second die D35-50 of the first embodiment to be exposed, a predetermined length of the exposed opening portion is supported by the pressing support rod H35-50 in close contact with the inner circumferential surface. Is set.

The support groove D35f of the secondary die D35-50 has a length such that the pressing punch H35-55 does not interfere with the stroke for crimping the inner ring P35c at the rear end of the semi-finished pipe electrode tube PM. It is formed of, and the pressing support bar (H35-50) is also configured to move control to the appropriate position that does not interfere with the operation of the pressing blade in the pressing process of the pressing punch (H35-55).

The semi-finished pipe electrode tube PM set in the secondary die D35-50 and the crimping support bar H35-50 having the above configuration is as shown in FIG.

When the inner ring P35c is crimped by operating the crimping punch H35-55, the inside of the rear end connecting pipe PMb of the semifinished pipe electrode tube PM is located at the rear of the inner ring P35c. It is molded into a semi-finished pipe-type electrode tube (PM1) formed with a wire connector (P35b) for connecting.

The semi-finished pipe electrode tube PM1 formed by the above process is discharged to the outside of the support groove D35f by the ejector EJ provided at the rear end of the support groove D35f, and the semi-finished pipe electrode tube PM1 discharged. ) Is a support groove of the tertiary die (D35-60) in a state in which the wire connector (P35b) is exposed, as shown in the six-step molding setting diagram (P35-60) of FIG. 14 by a molding hanger (not shown). In the state seated at D35g), the exposed connector pipe PMb is set to be supported by a piercing support rod H35-60 in close contact with the inner circumferential surface of the inner wire connector P35b.

The six-stage piercing support rod (H35-60) has a suitable form to support the connection pipe (PMb) without interfering with the punch blade operation stroke of the piercing punch (H35-65) for processing the screw hole (P35d) However, after the processing of the screw hole (P35d) has a configuration separated by means of exiting outward from the electric wire connector (P35b), for example, two up and down, without interference to the lower end of the screw hole (P35d) to be.

The six-stage piercing process diagram (P35-65) shown in FIG. 14 with respect to the rear end of the semi-finished pipe electrode tube (PM1) set in the tertiary die (D35-60) and the piercing support rod (H35-60) having the above configuration. Similarly, when the drawing operation is carried out by lowering operation control of the piercing punch H35-65, the semi-finished pipe electrode tube PM2 having a hole for the screw hole P35d is formed, so that the piercing punch H35-65 is raised and pierced. Semi-finished pipe-shaped electrode in which the hole for the screw hole P35d was formed by the ejector EJ provided at the rear end of the supporting groove D35g after the supporting rod H35-60 was sequentially removed from the lower side after the upper side. The pipe PM2 is discharged to the outside of the support groove D35g.

Subsequently, the semi-finished pipe-shaped electrode tube PM2 in which the hole for the screw hole P35d is formed is transferred to another processing die, and when the thread is tapped into the hole for the screw hole P35d by post processing, the screw hole P35d is used. Is formed into a predetermined example is completed with a pipe-like electrode (P35).

In implementing the configuration of the first embodiment of the present invention as described above, when the inner ring P35c is not required in the configuration of the example pipe-shaped electrode rod P35, the five-step molding setting diagram of FIG. 13 (P35-50) ) And the five-step compression process diagram P35-55 of FIG. 13 may be omitted.

In the first embodiment of the present invention for manufacturing the pipe-type electrode rod (P35) to produce the pipe-type electrode rod (P35) In the implementation of the method of manufacturing a pipe electrode rod preferably reduced the defect rate while increasing the dimensional stability, productivity, mold stability and life of the molding It can carry out by adding arbitrary processes for that.

For example, during the process of the pipe electrode manufacturing method of the first embodiment of the present invention, before the forming chip setting process according to the forming chip setting diagram P35-10 of FIG. 9,

Circumferential edges at both ends of the formed chip M1 cut to a predetermined size in a roll-shaped raw material brass bar, as shown in the forming chip corner shaping setting diagram (P35-5) and the shaping chip corner shaping process diagram (P35-5a) shown in FIG. In addition, by the addition of the forming chip edge shaping process to the appropriate arc surface by the right and left shaping chip shaping block (D35-5) having the shaping groove (D35r) chamfered to the circular arc or inclined surface at all. can do.

In general, in the case of cutting the forming chip M1 to a predetermined length from a roll-shaped brass bar, the cutting surface of the forming chip M1, which is cut even though the cutting mold is precise, causes some distortion in the cutting direction. The distortion occurs when the molding chip M1 is placed in the first-stage forming grooves D35a of the first embodiment forming block D35-10 having a precise diameter, thereby causing setting defects. The additional one-stage forming groove (D35a) is formed by the cutting chip while being cut by the leading edge of the forming grooves cause molding failure in the impact process.

Therefore, according to the addition of the molding chip edge shaping process, the molding chip M1 is seated in the one-step molding groove D35a by the molding chip hanger as shown in the one-step molding chip setting diagram P35-10 of FIG. 9. It is possible to secure the stability of the setting process and at the same time prevent the molding defect rate of the impact process.

In addition, during the process of the first embodiment pipe-type electrode manufacturing method of the present invention, before the first impact process according to the one-step impact process diagram (P35-15) of Figure 9,

As shown in the first stage preliminary impact setting diagram P35-7 and the first stage preliminary impact process diagram P35-7a shown in FIG. 16, the first stage forming groove of the first embodiment primary forming block D35-10 ( The first stage preformed groove D35s for accommodating the molding chip M1 is installed at the previous position of D35a), and the punch corresponding to the first stage preformed groove D35s has a hemispherical tip having a small diameter. Step Preliminary punch (H35-7) is provided, the pre-impact step of pre-impacting the tip portion of the molding chip M1 into a hemispherical shape with a small diameter can be performed.

In addition to the one-stage preliminary impact process described above, the one-stage punch (H35-10) used in the process of forming the cup-shaped one-stage chip molding (M1-10) is relatively thin, which is expected during impact operation. It is possible to prevent the bending or damage, such as possible to extend the life of the first stage punch (H35-10), and prevent the bad molding.

In addition, during the process of the pipe manufacturing method of the first embodiment of the present invention, before the second impact process according to the two-step impact process diagram (P35-25) of FIG.

Like the two-stage preliminary setting diagram (P35-16) and the two-stage preliminary impact process diagram (P35-17) shown in FIG. 17, the two-stage forming groove (D35b) of the first embodiment forming block (D35-10) Install the two-stage preformed groove (D35t) to receive the cup-shaped one-stage chip molding (M1-10) in the previous position of, and the punch configuration corresponding to the two-stage preformed groove (D35t) is the cup-shaped one-stage chip molding A two-stage preliminary punch (H35-17) with a two-stage punch rod with an outer diameter equal to the inner circumferential surface diameter of (M1-10) and a small outer diameter corresponding to half of this outer diameter is installed and seated in the two-stage preformed groove (D35t). The two-stage preliminary chip molding (M1-17) may be formed by adding a two-stage preliminary impact process of impact depth to a small diameter with respect to the center of the inner end surface of the cup-shaped one-stage chip molding (M1-10). .

In addition to the two-stage preliminary impact process described above, the two-stage impact process of lengthening the cup-shaped one-step chip molding (M1-10) and forming a thin thickness can be performed smoothly with less punching force. In addition, it is possible to extend the life of the two-stage punch (H35-20) and to reduce the mold failure rate of the pipe-shaped two-stage chip molding ((M1-20).

The first embodiment of the present invention for manufacturing the above-described pipe-shaped electrode rod (P35) forming grooves, support grooves and punches of the die for impact or drawing processing used in the pipe-shaped electrode production method is molded in the process The chipped or semi-finished piped electrode tubes PM1 and PM2 are formed with an appropriate subtraction gradient which can be easily set and pulled out.

In addition, during the process of the pipe electrode manufacturing method of the first embodiment of the present invention,

The hemispherical shape of the hemispherical tip portion PMa is formed into a regular hemispherical shape with respect to the semifinished pipe electrode tube PM completed in the four-stage reducing process as shown in the four-stage reducing process diagram (P35-45) of FIG. As a process for performing the above, a seven-step shaping process (P36-75) by the seven-step shaping setting diagram (P35-70) as shown in FIG. 18 may be additionally performed.

The four-stage reducing process, such as the four-stage reducing process diagram (P35-45) of the above-described embodiment, increases the length and reduces the thickness of the pipe-shaped three-stage chip molding (M1-30) formed by the three-stage impact process. It is a reducing process.

Therefore, even if the end portion of the internal forming groove D35j formed inside the four-stage reducing forming groove D35d is formed almost in a hemispherical shape, the reducing processing is not suitable for the shape processing on the cross section as compared with the impact or drawing processing. It is also difficult to form the hemispherical shape of the hemispherical tip portion PMa of the semifinished pipe-shaped electrode tube PM formed by the four-stage reducing process into a hemispherical shape with a regular rating.

Accordingly, in the four-stage reducing process according to the four-stage reducing setting diagram (P35-40) and the reducing process diagram (P35-45) of FIG. 12, the length of the pipe-shaped three-stage chip molding (M1-30) It is effective to limit the reducing process to increase the thickness and reduce the thickness, and to process the hemispherical tip portion PMa separately.

The configuration of the seven-stage impact punch (H35-70) installed in the seven-stage orthopedic drawing (P35-70) of Figure 18 uses the same specifications as the configuration of the four-stage reducing punch (H35-40),

A seven-step impact forming groove (D35p) is provided in a separate seven-step shaping die (D35-70) or a first-stage forming block (D35-10), and the inner end portion is formed in a nearly hemispherical shape. D35j) has the same hemispherical forming groove D35m as the hemispherical leading end PMa of the semifinished pipe-like electrode tube PM, and the remaining shape is the outer shape of the semifinished pipe-shaped electrode tube PM to be molded. It is formed to the same standard as.

According to the seven-step shaping setting diagram (P35-70) of the above configuration, if the shaping process of the tip portion PMa is additionally performed as in the seven-step shaping process diagram (P35-75), the four-stage reducing setting diagram (P35_40) 6) is formed in such a manner that the ends of the four-stage inner forming grooves D35j, which are formed almost in a hemispherical shape, are spaced apart from each other so as not to interfere with the reducing molding stroke, so that the tips of the reduced-molded moldings are shown in FIG. Although not molded into a regular hemispherical shape such as the tip portion PMa of the semi-finished pipe electrode tube PM of the example, it can be formed into a regular hemispherical tip portion PMa by a shaping process that impacts it into the hemisphere forming groove D35m. It is.

Pipe-type electrode manufacturing methods of the first embodiment of the present invention described above present a basic manufacturing method for manufacturing the pipe-type electrode (P35) of the example, and preferably, some processes are performed to improve productivity or product quality. It can be configured by changing to another configuration or by adding a new process.

19 to 20 illustrate the main part configuration provided to configure the pipe electrode manufacturing method according to the second embodiment of the present invention by changing only a part of the process to another configuration by applying the pipe electrode manufacturing method of the first embodiment. It is.

The second embodiment of the pipe electrode manufacturing method of the present invention uses the same molding material M2 of the second embodiment of the brass molding chip (M1) of the first embodiment, and after the third step The process is the same as that of the 1st Example mentioned above.

The difference is the first step of the pipe-shaped electrode manufacturing method of the first embodiment of the present invention described above, carried out by the one-step impact process diagram (P35-15) by the one-step molding chip setting diagram (P35-10) of FIG. The two-stage impact process performed by the two-stage impact process step (P35-25) by the two-stage impact process step (P35-20) according to the two-stage molding chip setting diagram (P35-20) of FIG. In order to ensure the ease of the two-stage impact processing, the mold stability and the life extension, it is possible to reduce the molding defects more.

The first step impact process in the second embodiment pipe-type electrode manufacturing method of the present invention is a one-step impact process diagram (P35-15a) according to another embodiment one-step molding chip setting diagram (P35-10a) shown in FIG. Another embodiment is a semi-conical one-step chip molding (M2-10) while using the same shape as the above-described example molding chip (M1) and the same shape chip (M2) It is characterized by molding.

Therefore, the first stage forming grooves D35a-1 of the second embodiment forming block D35-10a for forming the semi-conical one-step chip molding M2-10 have an inner end and a diameter of the forming chip M2. It is formed in the same diameter of 5.2mm, the opening diameter is carried out in a configuration to form larger than 5.2mm, the diameter of the inner end in accordance with the shape of the semi-conical one-step chip molding (M2-10).

In addition, the shape of the second embodiment first stage punch (H35-10a) used in the first stage impact process of the second embodiment also has a small diameter at the end and a large diameter at the rear end thereof. 10) is formed into a semi-conical shape that can be molded.

In addition, as shown in FIG. 20, the second embodiment is formed by the second embodiment two-step molding chip setting diagram (P35-20a) and the two-step impact process diagram (P35-25a) to be carried out after the first step impact process. Embodiment 2 In the form of the two-step chip molding, the inner end is formed with a diameter of 5.2 mm which is the same as the diameter of the molding chip M2, and the opening part is somewhat smaller than the diameter of the opening part of the semi-conical one-step chip molding M2-10. The semi-conical two-stage chip groove (D35b-1) and the two-stage punch (H35-20a) are also formed so that the semi-conical two-stage chip molding (M2-20) is molded to a crimped standard. The molding (M2-20) is formed into a semi-conical shape that can be molded.

As described above, the second embodiment of the pipe-type electrode manufacturing method of the present invention, the first step of the pipe-electrode manufacturing method of the first embodiment of the present invention, the first step of the impact process and the two-step impact process, the second embodiment Example A second embodiment semi-conical one-step chip molding (M2-10) is formed by substituting the first step molding chip setting diagram (P35-10a) and the first step impact process diagram (P35-15a).

Subsequently, the molded semiconical one-stage chip molding (M2-10) was opened in accordance with the second embodiment two-stage molding chip setting diagram (P35-20a) and two-stage impact process diagram (P35-25a). By molding the chip molding (M2-20), as compared to the pipe electrode manufacturing method of the first embodiment of the present invention described above, it is possible to secure the impact processing ease, mold stability and life extension in the first and second stages, It has a characteristic to be reduced.

21 is a third embodiment of a pipe type electrode rod P35, which is another embodiment for manufacturing the pipe type electrode rod P35 of the above example by changing some processes of the method of manufacturing a pipe type electrode rod described above to another configuration. The main configuration of the electrode manufacturing method is shown.

The third embodiment of the present invention, the pipe-type electrode manufacturing method is that the molding material using a brass molding chip (M), the first and second stage impact processes and the first and second steps performed in the first and second embodiments described above. It is the same in the point which performs the same general process after 4 steps.

The difference is the three-stage impact process diagram (P35-35) according to the three-stage molding chip setting diagram (P35-30) of FIG. By replacing the process of forming a pipe-shaped three-stage electrode tube (M1-30) of a predetermined length with a three-stage impact process to be replaced with a three-stage reducing process of the third embodiment,

It is characterized by forming the same pipe-type three-stage electrode tube (M3-30) and a certain length of the pipe-type three-stage electrode tube (M1-30).

The third embodiment of the present invention shown in FIG. 21 is used in the third embodiment forming chip setting diagram (P35-30b) and the three-step reducing process diagram (P35-35b) of the third embodiment, which is the main configuration of the pipe electrode manufacturing method. The third embodiment of the third step D35-30c is formed in the same manner as the diameter D2 of the connection pipe P35e of the semi-finished pipe electrode tube PM to be molded in the diameter of the reducing molding groove Dh1. The third embodiment reducing punch H35-30c has the same diameter as that of the first embodiment third step punch H35-30, but has a length approximately twice as long.

The third embodiment third step reduction process of the third embodiment of the present invention by the third embodiment die and punches is performed in the third embodiment third die D35-30c having the above-described configuration. The third embodiment pipe-shaped two-stage chip molding M3-20 first formed by the above-described other embodiments with the guide piece G1 between the tip and the third-stage reducing punch H35-30c. With position aligned,

Third embodiment The third embodiment pipe-shaped two-stage chip molding (M3-20) by punching the third embodiment three-stage reducing punch (H35-30c), the third embodiment pipe-type two-stage chip molding (M3--20) 20) The third embodiment The third embodiment pipe type three-stage chip molding that is reduced in diameter, longer in length and thinner by the reducing processing process forcibly penetrating the three-stage reducing forming groove Dh1. It is molding (M3-20).

The third embodiment pipe-type three-stage chip molding (M3-30) molded in the above-described configuration is the first embodiment four-stage molding chip setting diagram (P35-40) and the four-stage reducing process diagram ( P35-45) is added to the four-stage reducing process to form an example semi-finished pipe electrode tube (PM).

The first, second, and third exemplary embodiments of the pipe electrode manufacturing methods described so far are replaced with the rod electrode 35 of the prefabricated power plug 30 shown in FIGS. It relates to a method for manufacturing an edible pipe type electrode rod (P35),

These first, second, and third embodiments of the method for manufacturing a pipe electrode are used for the pipe electrode (P45) shown in FIG. As a manufacturing method of the electrode can be implemented by changing some processes and mold apparatus.

22 to 24 of the present invention for manufacturing the example pipe-type electrode rod (P45) shown in Figure 5, which is used as the electrode rod 45 of the example mold-type power plug 40 shown in FIG. Fourth Embodiment A main configuration of a pipe-type electrode manufacturing method is shown.

The shape of the example pipe-shaped electrode rod P45 illustrated in FIG. 5 is a pipe-type, and the standard of the hemisphere portion and the straight portion of the tip portion P45a is the same as that of the pipe-shaped electrode rod P35 described above. The semi-finished pipe electrode tube (PM) shown in Figure 6 can be used as a base member,

The configuration of the electric wire connector P45b formed at the rear end and the fixing cylinder P45c for integrally molding the mold fixing member 42 is the diameter Da of the semi-finished pipe electrode tube PM shown in FIG. 6. Since it is formed with the cylindrical tube of diameter smaller than), the separate process for processing these forms is calculated | required, and the structure of the fixed wheel P45d is also required for post-processing.

Therefore, the fourth embodiment of the pipe electrode manufacturing method of the present invention, the molding material using the brass molding chip (M), and the first to fourth step impact processes carried out in the first embodiment of the present invention described above And the process of shaping the semi-finished pipe electrode tube PM by the reducing process is provided in the same way.

The difference is that instead of the post-processing processes performed on the rear end of the semifinished pipe-type electrode tube PM after the fourth step process in the first embodiment, the semi-finished pipe-type electrode tube PM and the hemispherical tip PMa A reduction drawing process is performed in which the remaining rear straight portion except for some straight portions is reduced to a cylindrical cylinder having a small diameter to form a fixed cylinder P45c, and then a compression is performed to form the fixed wheel P45d at one rear side of the fixed cylinder P45c. It is formed by a method of completing an example pipe-shaped electrode rod (P45) by the drawing process.

Referring to the main steps of the fourth embodiment of the pipe-shaped electrode manufacturing method of the present invention in more detail.

FIG. 22 is a view illustrating a method of manufacturing a pipe-type electrode rod according to a fourth embodiment of the present invention, which is performed in the same manner as the first to fourth step impact processes and reducing processes performed in the first embodiment of the present invention. For the semi-finished pipe-shaped electrode tube PM formed by the above-described method, the first step for reducing the hemispherical front end portion PMa and the rear end portion except the part of the straight portion is formed by a cylindrical cylinder of small diameter P45c having a small diameter. Fourth Embodiment A reduced drawing setting diagram (P45-50) and a reduced drawing process diagram (P45-55) of one step are shown.

The fourth embodiment used in the one-step reduction drawing process according to the fourth step reduction drawing setting diagram (P45-50) and the one-step reduction drawing processing diagram (P45-55). 50 is a configuration in which a fixing groove D45a is provided to fix the tip side of the semifinished pipe electrode tube PM with the hemispherical tip portion P45a to a boundary with the fixing cylinder P45c to be molded. ego,

Fourth Embodiment Step 1 The reduced drawing punch (H45-50) has a cylindrical punch groove (R45a) of a predetermined size corresponding to the diameter and length of the fixed cylinder (P45c) to be molded into the semifinished pipe electrode tube (PM) at the tip. It is formed with a fallopian tube extension part, and is provided with a supporting rod (H45-51) having the same diameter as the inner diameter of the fixed cylinder (P45c) to be reduced in the inner center of the punch groove (R45a).

According to the fourth embodiment of the present invention, the reduced drawing process according to the above-described configuration,

As shown in the step 1 reduced drawing setting diagram (P45-50), the hemispherical tip P45a side of the semifinished pipe electrode tube PM is held in the fixing groove D45a of the step 1 reduced drawing die D45-50. In the state,

When the one-step reduced drawing punch (H45-50) with the punch groove (R45a) is punched to the open side of the semi-finished pipe electrode tube (PM) as shown in the one-step reduced drawing process diagram (P45-55), the semi-finished pipe type A part of the straight portion of the electrode tube PM is formed into a conical tube PM4e by the trumpet-shaped punch groove R45a of the one-step reduction drawing punch H45-50, and the rear end portion is formed with a predetermined fixed cylinder ( P45c) is carried out by a semi-finished pipe-shaped electrode tube (PM2) reduced to the diameter of P45c) by a step-by-step drawing molding.

Fig. 23 shows a conical tube PM4e which is formed by the above-described one-step reduction drawing process, while simultaneously reducing the conical tube PM4e to the same diameter as the rear end fixing cylinder P45c of a small diameter. Fourth Example of Reduced-Phase Drawing of Two-Phase Pipe Lines PM4e and Large Diameter Straight Line Particles with Nearly Straight Steps P45e Two-stage Reduced Drawing Setting Diagram (P45-60) and Two-stage Reduced Drawing Process Diagram (P45) -65) is shown.

Fourth Embodiment The second embodiment reduced drawing die P45-60 and the second step reduced drawing process P45-65 according to the fourth embodiment The second step reduced drawing die D45- 60 is a configuration in which a fixing groove D45b is provided which can fix the tip side of the semifinished pipe electrode tube PM2 having the hemispherical tip portion P45a to the boundary with the fixing cylinder P45c to be molded. ego,

Fourth Embodiment Step 2 The reduced drawing punch H45-60 is a cylindrical punch of a predetermined size corresponding to the diameter and length of a small diameter fixing cylinder P45c to be formed by reprocessing the semifinished pipe electrode tube PM2. The groove R45b is formed.

In the second embodiment, the reduced drawing process of the fourth embodiment of the present invention having the above-described configuration,

As shown in the two-stage reduced drawing setting diagram (P45-60), the hemispherical tip (P45a) side of the semi-finished pipe-type electrode tube PM4-1 is inserted into the fixing groove D45b of the two-stage reduced drawing die D45-60. With support,

As shown in the two-stage reduced drawing process diagram (P45-65), when the two-stage reduced drawing punch (H45-60) with the punch groove (R45b) is punched to the open side of the semi-finished pipe electrode tube (PM2), the semi-finished pipe type The conical tube PM4e of the electrode tube PM2 has a predetermined diameter having a straight step P45e and the front end side of the semifinished pipe-shaped electrode tube by the punch groove R45b of the two-stage reduction drawing punch H45-60. It is carried out by the method of shaping the fixed cylinder (P45c) of the two-stage reduced drawing by the semi-finished pipe-type electrode tube (PM3).

FIG. 24 illustrates a semi-finished pipe-shaped electrode tube PM3 formed by the two-stage reduction drawing process as described above, by performing a compression drawing process of forming the fixed ring P45d on one side of the rear end of the fixed cylinder P45c. Fourth Embodiment The three-stage compression drawing setting diagram P45-70 and the three-stage compression drawing process diagram P45-75 are shown to complete the example pipe-shaped electrode P45.

Fourth Embodiment A three-stage compression drawing die (D45-D) used in a three-stage compression drawing process using the three-stage compression drawing setting diagram (P45-70) and the three-stage compression drawing process diagram (P45-75). 70 is a configuration in which a fixing groove D45c is provided which can fix the tip side of the semifinished pipe electrode tube PM3 with the hemispherical tip portion P45a to the boundary portion P45e with the fixing cylinder P45c. ego,

Fourth Embodiment The third step of the compression drawing intermediate dies D45-75 has a structure divided into two sides, and a support groove D45d for supporting a part of the fixing cylinder P45c of the semifinished pipe electrode tube PM3 in a penetrating state. ) Is configured with an annular expansion portion D45e which forms half of the fixed wheel P45d at the tip end.

Fourth Embodiment The third step of the compressed drawing punch (H45-70) is fixed at the distal end by a punch groove (R45c) that supports the rear end of the semifinished pipe electrode tube (PM3) in an inserted state up to the position where the fixed wheel (P45d) is located. It is the structure provided with the annular expansion part D45f which shape | molds half of the wheel P45d, and a support rod (H45-71) in the center.

The fourth embodiment three-stage compression drawing process of the present invention by the above configuration,

As shown in the three-stage compression drawing setting diagram (P45-70), the hemispherical tip (P45a) side of the semi-finished pipe-type electrode tube PM3 is supported by the fixing groove D45c of the three-stage compression drawing die D45-70. In the state where the supporting groove D45d of the three-stage compression drawing intermediate die D45-75 is fitted into the fixed cylinder P45c of the supported semifinished pipe electrode tube PM3,

As shown in the three-stage compressed drawing flow chart (P45-75), the three-stage compressed drawing punch (H45-70) with the punch groove (R45c) is punched toward the rear end of the fixed cylinder (P45c) of the semi-finished pipe type electrode tube (PM3). By inserting the rear end of the intermediate member P45c of the semifinished pipe electrode tube PM3 into the punch groove R45c of the three-stage compression drawing punch H45-70 and the annular extension D45e of the intermediate die D45-75. By compressing to the side, and extending a part of the rear end portion of the intermediate member P45c to the outside while forming a predetermined fixed wheel P45d on one side of the rear end of the fixed cylinder P45c by the annular expansion portions D45e and D45f. Is carried out.

According to the manufacturing method of the fourth embodiment pipe-type electrode of the present invention as described above, it is possible to manufacture a pipe-type electrode (P45) as shown in FIG. 5 used as an electrode of an example mold-type power plug (40). It is.

In carrying out the present invention as described above, the mold apparatus of the above-described embodiments and manufacturing processes using the same are presented as a preferred embodiment for carrying out the present invention, and are not intended to limit the present invention.

For example, the material of the rod-shaped molding chip used as the molding material of the present invention is most preferable because of the high malleability and electrical conductivity and low price, using the brass material as an example. In addition to brass, other materials may be used to secure the malleability and electrical conductivity, which are easy to cold work, depending on the application.

Also, the diameter and length of the round bar-shaped chip may be increased or decreased according to the specifications of the electrode tube or pipe electrode to be molded, and the die grooves and punches may be changed and increased accordingly. You can do it.

In addition, the shape or specification of the pipe-shaped electrode tube or electrode to be manufactured by the present invention can be applied to other forms and specifications by the same means in addition to the configuration of the above-described example.

In addition, the present invention can be carried out in addition to the various embodiments described above, to improve the efficiency of the impact, drawing, reducing processing, or to perform the overall machining process in a complex process, or to change or increase or decrease part of the mold apparatus and manufacturing process. According to the shape of the rod-shaped electrode, arbitrary processes and mold apparatuses may be combined.

In addition, the thickness of the above-described various kinds of semi-finished pipe-type electrode tubes PM or pipe-type electrode rods P35, P45, and P65 manufactured according to the present invention may be increased or decreased to an arbitrary standard, and in particular, The thickness of the hemispherical tip portion PMa connected to the power outlet and a portion of the peripheral portion thereof may be formed to be thicker than the thickness of the straight portion. If the thickness t1 of the straight portion is sufficiently secured, the thickness of the hemispherical tip portion PMa is secured. It is also possible to form (t2) uniformly.

As described above, according to the manufacturing method of the pipe-type electrode rod for power plug according to the present invention, in the production of the rod-shaped electrode rod mainly used for the power plug for 200-250V, several cutting processes are performed using a conventional brass rod as the main material. Compared to the electrode rod manufacturing method using the brass pipe of the invention as well as the manufacturing method of the main process, using the molding chip of the brass rod material, the cost per unit weight is about half of the brass pipe, By forming a pipe-type electrode by the impact, reducing and drawing process by cold forging machine or press which has high automatic productivity, it saves up to half of material cost and greatly reduces manufacturing cost by reducing the manufacturing process. It is to have an effect that can be increased, and the molding of the hemispherical tip is smooth and easy.

Claims (7)

As a molding material, a round bar shaped chip having a predetermined diameter and length having an appropriate volume required for molding a pipe-shaped electrode rod for power plug of an arbitrary size, By using a cold forging machine or a press set with several forming grooves and a forming block in which a punch and an ejector are installed in one block stepwise, the round-shaped forming chip is raised by an impact processing process and a reducing process. Manufacture of pipe-type electrode rods for power plugs, characterized in that the cup cups are made of semi-finished pipe-shaped electrode tubes with a long length and thin thickness, one side of which has a hemispherical tip, and the other side of which is formed in a low cup thickness. Way. According to claim 1, wherein the forming step of the pipe-shaped electrode tube for power plugs, followed by the drawing process by cold forging or pressing of the intermediate member of the molded semi-finished pipe-type electrode tube formed into a small diameter mold member fixing cylinder Method for producing a pipe-type electrode for power plug, characterized in that. 2. The molding process according to claim 1, wherein a molding process for forming a small diameter mold member fixing tube is formed at the rear end of the intermediate member of the pipe-type electrode tube for power plug, followed by a drawing process by a cold forging machine or a press. A method of manufacturing a pipe-type electrode rod for a power plug, characterized in that for forming an annular fixed ring protruding outward from the end. The method of claim 1, wherein the round rod-shaped molded chip is made of brass. The process of forming a semifinished pipe-type electrode tube according to claim 1, wherein the forming of the semi-finished pipe electrode tube includes a corner smoothing process of rounding both circumferential circumferential edges of a brass round bar formed chip cut to an appropriate length from a long roll-shaped brass round bar. Method for producing a pipe-type electrode for power plug, characterized in that. The process for forming a predetermined power plug pipe electrode rod formed into the semifinished pipe electrode tube according to claim 1, wherein the hemispherical tip portion P35a is used as one side end portion, and the other side end portion is opened to have a diameter thickened to the outside. The semi-finished pipe-shaped electrode tube PM formed of a straight pipe having a predetermined length having a connecting tube PM35e having a shape is formed, and the inside of the semi-finished pipe-shaped electrode tube PM is connected to the connecting tube PM35e by a compression process. Is formed by the inner ring (P35c) to connect the wire (34) by inserting a predetermined length by the inner ring (P35c), the side end screw hole (P35d) for screwing the fixing screw 37 by piercing processing A method of manufacturing a pipe-type electrode rod for a power plug, characterized in that formed by a pipe-type electrode rod (P35) for a power plug. The process for forming a predetermined power plug pipe electrode rod formed into the semifinished pipe electrode tube according to claim 1, wherein the hemispherical tip portion P35a is used as one side end portion, and the other side end portion is opened to have a diameter thickened to the outside. The semi-finished pipe-shaped electrode tube PM formed of a straight pipe having a predetermined length having a connecting pipe PM35e having a shape is formed, and the semi-finished pipe-shaped electrode tube PM is formed on the hemispherical tip portion P45a by a compression drawing process. Forming a fixed cylinder (P45c) integrally molded with the mold-type fixing member 42 of the molded power plug while being formed to be connected to the front of the short length of the straight pipe having a low step diameter and a long length, the molded power plug, On the rear end side of the fixing cylinder P45c, a protruding fixing wheel P45d for integrally molding with the mold-type fixing member 42 is processed to form a pipe-type electrode rod for a molded power plug ( P45) characterized in that the manufacturing method of the pipe-type electrode rod for power plug.