KR100986237B1 - manufacture method of pipe-type electrode for power plug - Google Patents

Abstract

In the production of rod-shaped electrode rods mainly used for power plugs for 200-250V, the manufacturing method of manufacturing brass round rod electrode rods and brass pipes are made of conventional brass rods and several cutting processes as main processes. In comparison with the manufacturing method of manufacturing the rod-shaped electrode rod by the drawing process by the press method, the brass material having a predetermined diameter and length having an appropriate volume required for forming the pipe-shaped electrode rod corresponding to the regular rating of the rod-shaped electrode rod. After using the round bar shaping chip, the shaping chip is first formed into a predetermined pipe-type electrode tube by a cold forging machine or a press in which several impact molds are set, by an impact machining process or a drawing machining process. , Compressing the mold member fixing cylinder on one side in the middle with respect to the molded pipe-type electrode tube It is formed by rowing or drawing process wire connector of a certain type for electrical connection with electric wire to the rear end, and finished with pipe type electrode rod for predetermined power plug, further reducing material cost and manufacturing cost The present invention provides a manufacturing method of a pipe-type electrode rod for a power plug which greatly reduces, increases productivity by automatic productivity, and facilitates molding of a hemispherical tip.

Power plug, Rod electrode, Molded chip, Pipe, Cold forging, Impact, Drawing, Die, Punch

Description

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

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 the power plug for an example adapter to which the present invention is applied

5 is an exploded cross-sectional view of a power plug for an example adapter to which the present invention is applied;

6 is a cross-sectional view of an example prefabricated power plug-type electrode rod to be molded according to the present invention.

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

8 is a cross-sectional view of a pipe type electrode rod for one example adapter type power plug to be molded according to the present invention

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

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

11 to 17 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

18 is a process chart for the corner shaping of the forming chip used in the present invention

19 is a preliminary impact process diagram carried out in various embodiments manufacturing method of the present invention

20 is a one-step preliminary impact process diagram carried out in various embodiments manufacturing method of the present invention

Figure 21 is a one-step impact process diagram in the manufacturing method of the second embodiment of the present invention

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

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

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

25 is a drawing process drawing of the five steps of the manufacturing method of the third embodiment of the present invention;

Figure 26 is a one-step reduced drawing process diagram in the manufacturing method of the fourth embodiment of the present invention.

FIG. 27 is a two-step drawing process drawing in the manufacturing method of the fourth embodiment of the present invention. FIG.

28 is a two-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

60: adapter power plug 61: power plug body 62: electrode holder

63: Single insertion hole 64: Electrode piece connecting terminal 65: Pipe type electrode

65a: Hemispherical tip 65b: Annular connecting terminal 66: Screw

70: 100 ~ 120V power plug 71: electrode

P35: Pipe type electrode rods for assembled power plug P35a, P45a, P65a: Hemispherical tip

P35b: Cable connector P35c: Inner ring P35d: Screw thread

D: Diameter of electrode rod D1: Diameter of fixed cylinder (P45c) L: Length of electrode straight portion

t1: Thickness of the straight part of the electrode middle member t2: Thickness of the hemispherical tip

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 PMc: Middle member

Da: Diameter of pipe type electrode tube Db: Internal diameter of pipe type electrode tube

ta: thickness of the intermediate member of the electrode tube tb: thickness of the hemispherical tip

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 Primary Mold 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: First Embodiment Drawing Process Drawing

D35d: First Embodiment Fourth Step Drawing Molding Groove H35-40: First Embodiment Fourth Step Punch

M1-40: Pipe Type 4-Stage Chip Forming

P35-50: Example 1 Step 5 Molding Setting Diagram

P35-55: First Embodiment 5-Step Cutting Process Diagram

D35-50: First Embodiment Step 5 Die D35e: Supporting Groove

H35-50: Cutting base rod C35: Cutter PM1: Semi-finished pipe electrode

P35-60: Example 6 Step Molding Setting Diagram

P35-65: First Example 6-Step Crimping Process Diagram

D35-60: First Embodiment Step 6 Die D35f: Supporting Groove H35-60: Crimping Base Bar

H35-65: Crimping punch PM1, PM1a: Semi-finished pipe type electrode tube

P35-70: Example 1 Step 7 Molding Setting Diagram                 

P35-75: First Embodiment Seven Step Piercing Process Diagram D35-70: First Embodiment Seven Step Die

D35g: Supporting groove H35-70: Piercing support rod H35-75: Piercing punch

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

P35-10a: 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: 2-Step Impact Process Diagram D35-10a: Example 2 Mold 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 Step 3 Drawing Drawing

D35-30c: Third Example Three-Step Die Dh1: Drawing Molding Groove

H35-30c: Third Embodiment Third Step Drawing Punch

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

P35-40b: Third Example Step 4 Chip Forming Diagram

P35-45b: Third Example Step 4 Drawing Process

D35-40c: Third Example Step 4 Die Dh2: Drawing Molding Groove

H35-40c: Third Embodiment Step 4 Punch Drawing

M3-40: Third embodiment Pipe-type 4-stage chip molding

P35-50b: Third Example 5-Step Molding Chip Setting Diagram

P35-55b: Third Embodiment Step 5 Drawing Process

M3-50: Third embodiment Pipe type 5-stage chip molding G3: Guide piece

D35-50c: Third Example 5 Step Die Dh3: Drawing Molding Groove

H35-50c: Third Embodiment Five-Step Drawing Punch

PM4: Fourth Example Five Step Semi-finished Pipe Type Electrode Tube

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                 

PM4-1: Semi-finished pipe type electrode tube PM4e: Circular boundary of arc

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

PM4-2: 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

The present invention relates to a method of manufacturing an electrode rod for a power plug, and in particular, the production of a rod-shaped electrode rod mainly used for a power plug for 200-250V among the electrodes, using a cold-formed forging machine or a molded chip in the form of a single rod. It relates to a method for producing a pipe-shaped electrode by the impact and drawing method by a press.

Among the types of power plugs, power plugs for 200-250V have various types of electrode rods depending on the manufacturing method and use of the power plug.

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 in a predetermined depth to insert the wire 34 in the fixed, screw hole 36 is formed on the side end of the wire connector (35b) is configured to install a fixing screw (37) for pressing and fixing the wire to be.

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

In this configuration, the two rod-shaped electrode rods 45 having the hemispherical tip portion 45a are fixed integrally by the mold-type fixing member 42 with the fixing cylinder 45c and the fixing wheel 45d formed with a tapered diameter after the middle. 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.

4 to 5 of the adapter-type power plug 60, which allows the electrode rod to be plugged into a 200-250V outlet having a circular insertion hole, mainly for 100-120V power plugs 70 having a circular shape. The configuration is shown.

The adapter-type power plug 60 is formed with two shaped insertion holes 63 into which the front side is opened and the two electrode pieces 71 of the power plug 70 for 100 to 120V are fitted on the rear end side thereof. A power plug main body 61 in which two electrode piece connecting terminals 64 are provided;

An electrode rod holder 62 fitted to the front opening side of the main body 61 and assembled by a screw 66;

The front part is a circular columnar shape having a hemispherical tip portion 65a exposed to the front side of the main body 61, and the rear part is an annular connection supported at the rear end of the fixing piece 62 by being fitted to these fixing pieces 62. The terminal 65b is formed and consists of two rod-shaped electrode bars 65 which are connected to the two electrode piece connecting terminals 64 in a pressed state.                         

Looking at the configuration of the three types of rod-shaped electrode rods 35, 45, 65 used in the general 200-250V power plugs as described above, the rear end is a wire connector for fixing the wires 34, 44 (35b) (45b) is formed, or has a variety of forms according to the form and manufacturing method, such as simply formed an annular connecting terminal (65b), but in common in the configuration of the electrode tip (35a) (45a) The shape of (65a) is formed in a hemispherical shape or a shape similar to hemispherical shape so that it can be easily inserted into a power hole of a 200-250V outlet, and is composed of a brass round bar having a predetermined diameter and a predetermined length.

The conventional method of manufacturing the rod-shaped electrode rods 35, 45 and 65 for the conventional 200-250V is made of a brass rod of a suitable diameter as a material, using a cutting machine such as a lathe, A first cutting process for cutting the full length, followed by a second cutting process for cutting the hemispherical ends 35a, 45a, 65a, and then for the electrical connection with the wires 34, 44 at the rear end. In order to form the connection member in the form of the predetermined wire connector (35b) (45b) by molding a boring or crimping process, or by press-molding the annular connecting terminal (65b), or for the fixing screw 37 After forming the entire shape of the rod-shaped electrode rods 35, 45, 65 by a tertiary process such as machining the screw hole 36 at the side end, nickel plating is applied to the surface of the manufactured electrode rod for final completion. Is prepared.

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, the various manufacturing methods of the rod-shaped electrode rods provided so far have advantages and disadvantages for each manufacturing method. However, most rod-shaped electrode rods except for special purpose electrode rods are made of brass rods, and the main 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. In the case of inadequate mass productivity and automatic production, the manufacturing cost was high because the manufacturing equipment was expensive.

As the invention to solve the disadvantages of the conventional rod-shaped electrode rod manufacturing method using the above-described brass rod as a molding material and a number of cutting processes as a main process, the present application for the power plug as domestic 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.

In the above-described invention, in the manufacture of a rod-shaped electrode rod for power plug, a drawing method by press using a brass pipe as a molding material, the hemispherical tip portions P35a, P45a, P65a as shown in Figs. Rod-type electrodes (P35) (P45) (P65), which are hollow inside, can be manufactured, thereby reducing material loss and weight ratio per unit volume, and cutting rod-shaped electrodes (35, 45) manufactured by cutting conventional round rods ( Compared to 65), the material cost can be reduced to about 1/2.

However, in the above invention, at least two or more steps are required for forming a brass pipe, which is a molding material, into a smooth hemispherical shape by drawing, and a hemispherical tip part P35a (P45a) (P65a) as a finished product. In order to complete a smooth surface, 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, it is possible to manufacture the pipe electrode by the impact and drawing method by cold forging machine or press by using brass round bar forming chip instead of brass pipe. As a feature, the material cost is further reduced compared to the prior invention to lower the manufacturing cost, An object of the present invention is to provide a method for manufacturing a pipe-type electrode rod for a power plug that can increase productivity and facilitate molding of a hemispherical tip.

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 mold block in which several dies, punches and ejectors are integrally installed in the impact and drawing processes in stages is mounted.

By using a cold forging machine or a press set with several forming grooves, a punch mold and an ejector in which a stage and a punch and an ejector are set in stages, the round-shaped molding chip is made low by an impact processing process or a drawing processing process. In the thick cup type, gradually longer and thinner, hemispherical tip is formed on one side and semi-finished pipe-type electrode tube of open length on the other side,
In the process of forming a predetermined power plug-type pipe electrode rod molded into the semi-finished pipe-type electrode tube, the semi-finished pipe-type electrode tube formed of a hemispherical front end portion with one side end portion and the other side end portion formed with a straight pipe having a predetermined length. With respect to the open part by the crimping process, the inner part of the open part is formed by the inner ring to connect the wire by inserting a predetermined length, and the prefabricated power plug is processed by piercing the screw hole for screwing the fixing screw at the open end. Characterized in that it is formed of a pipe-shaped electrode rod.

In the constitution of the present invention, the forming process of the pipe-type electrode tube for power plug is followed by a drawing process by a cold forging machine or a press with respect to the intermediate member of the molded semi-finished pipe-type electrode tube. It may further comprise a molding step.

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. Process and supply. It is possible to carry out by adding a corner smoothing step to round the circumferential edges of both cross-sections to the cut brass round bar forming chip.

In the process of manufacturing a pipe-type electrode tube for completing the pipe-type electrode rod for power plug of the present invention, the impact processing step of the molding chip by a cold forging machine in which several impact dies are set After forming the semi-finished pipe-shaped electrode tube of cup-shaped semi-finished product that is larger than the diameter of the regular pipe electrode and shorter in length, the semi-finished pipe-shaped electrode tube is then reduced in diameter and lengthened by at least three or more press drawing processes. It can be carried out by the combined impact and drawing process by cold forging machine and presses which are formed into pipe type electrode tube with regular diameter and length.

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.

6 is 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 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.

7 is provided for replacing the rod-shaped electrode 45 for the conventional example one-type power plug 40 as described above, for an example molded-type power plug to be molded according to various embodiments of the present invention The configuration of the pipe electrode P45 is shown.

The structure of the pipe-shaped electrode rod P45 for the mold-type power plug of the above example is the same as the shape of the rod-shaped electrode rod 45 for the 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 wheel (P45d) in a configuration corresponding to the fixed wheel (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 fixing tube P45c is about 0.2 mm. same.

8 is provided for replacing the rod-shaped electrode 65 for the conventional one-type adapter-type power plug 60 described above, for an example adapter-type power plug to be molded by various embodiments of the present invention The configuration of the pipe electrode P65 is shown.

The pipe-type electrode rod P65 for the adapter-type power plug of the above example has the same diameter and length as the rod-shaped electrode rod 65 for the adapter-type power plug, and the hemispherical tip portion P65a at the tip has a conventional hemispherical tip portion. It is formed in the same standard as the aperture of 65a, and is formed in the rear end with the connection terminal P65b of the same specification as the conventional annular connection terminal 65b.

FIG. 9 shows a configuration of a semi-finished pipe-type 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-type electrode tube PM, reference PMa denotes a hemispherical tip, reference PMc denotes a middle member which is a straight portion, reference Da denotes a diameter of an electrode tube including a tip, and reference symbol Db The inner diameter is indicated, and the symbol La indicates the length of the straight middle member PMc of the electrode tube excluding the hemisphere of the hemispherical tip PMa, and the symbol ta indicates the thickness of the circular pillar middle member PMc. tb represents the thickness of the hemispherical tip portion PMa.

The semi-finished pipe-shaped electrode tube PM is used as an intermediate member for forming the above-described pipe-shaped electrode rods P35, P45, and P65. Electrode rods do not require a fixing member is 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. 10 illustrates a configuration of a brass rod molding chip M, which is a molding material used when manufacturing the pipe-shaped electrode rods P35, P45, and P65 by various manufacturing methods of the present invention. The symbol MD denotes the diameter of the molded chip, and the symbol ML denotes the length of the molded chip.

11 to 17 illustrate a process diagram of a method for manufacturing a pipe type electrode rod according to a first embodiment of the present invention for manufacturing a pipe type electrode rod P35 for a prefabricated power plug.

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 9 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 , If the thickness (tb) of the hemispherical tip portion (PMa) is to be formed in the specification of about 2.0mm, the material volume is about 110㎣,

For example, the size of the molding chip M1 is about 120 mm, which is somewhat larger than the actual material volume of the pipe-shaped electrode rod P35 in view of the member whose diameter MD is equal to 4.8 mm while the volume is cut during molding. The length ML is about 6.6 mm.

An example of the above-described standard forming chip (M1) is a cold block for the cold processing of the horizontal row battering or vertical battering type mold block mounted on the press (punch block with several stepped punches installed in one body, Several stage dies are automatically supplied to a cold forged block set consisting of die blocks mounted on one body in a single body, and several stage dies and punches are stepwise by a transfer such as a hanger. While moving to luxury, it is molded into an example semi-finished pipe-type electrode tube (PM) through the following successive series of impact processes, drawing processes and cutting processes.

An example molded chip M1 of the standard is molded in a first embodiment primary mold block D35-10 mounted in a cold forging machine or a press, as shown in the first-stage forming chip setting diagram P35-10 of FIG. 11. A chip hanger (not shown) is used to settle between the first stage punch H35-10 and the first stage forming groove D35a.

The first step forming groove (D35a) is formed in a cylindrical shape of a predetermined diameter and a predetermined length having a suitable insertion gap that can be inserted in the longitudinal direction, for example the molding chip (M1) of the diameter of 4.8mm,

The first stage punch (H35-10) is composed of a cylindrical rod of about 3.3mm in diameter and a certain 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. 11 by the one-step molding groove D35a and the punch H35-10, the outer diameter is 4.8 mm. And the cup-shaped one-step chip molding (M1-10) slightly higher than 6.0mm is molded.

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), and the two-step molding groove (D35b) and the two-step punch (H35-20) as shown in the two-step molding setting diagram (P35-20) of FIG. 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 length and a diameter of about 3.8 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) having the above configuration is subjected to two-step impact processing as shown in the two-step impact process diagram (P35-25) of FIG. 12, the outer diameter is 4.8 mm. A pipe-shaped two-stage chip molding (M1-20) is formed, which is lengthened by a certain length and is thinner by about 0.5 mm.

Pipe-shaped two-stage chip molding (M1-20) formed by the 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. 13. 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 a similar semi-ellipse,

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 4.2mm, the end portion is formed 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 0.4 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. 13, the two-stage chip moldings Compared to (M1-20), the outer diameter is the same as 4.8mm and the thickness of the straight portion (ta) is thinner than about 0.3mm, the tip thickness (tb) is about 0.4mm, and the length is semi-finished pipe electrode tube (PM) length. The pipe-shaped three-stage chip molding (M1-30), which is up to about half of the length, is formed.

Pipe-shaped three-stage chip molding (M1-30) formed by the above process is discharged to the outside of the forming groove (D35c) by the ejector (EJ) provided at the rear end of the three-step molding groove (D35c), pipe type discharged The three-stage chip molding (M1-30) is a four-stage punch (H35-40) and four-stage molding groove (D35d) as shown in the four-step molding setting diagram (P35-40) of Figure 14 by the molding chip hanger (not shown) Settled in between.

The four-stage forming groove (D35d) is longer than the length of the three-stage forming groove (D35c) and the same diameter and the inner end is formed in a hemispherical corner,

Four-stage punch (H35-40) has a length slightly longer than the length of the semi-finished pipe electrode tube (PM), the leading end is impact stroke up to 0.2mmm in the hemispherical inner end of the four-stage forming groove (D35d), diameter Is formed of 4.4mm.

When the pipe-type three-stage chip molding (M1-30) set as described above is subjected to four-stage impact processing as shown in the four-stage impact process diagram (P35-45) of FIG. 14, the outer diameter is 4.8 mm and the length of the straight part is a semi-finished pipe type. It is slightly longer than the length of the straight portion La of the electrode tube PM, the thickness of the straight portion ta is 0.2 mm and the thickness of the tip portion Pma tb is 0.2 mm. -40) is molded.

Pipe-shaped four-stage chip molding (M1-40) formed by the process is discharged to the outside of the forming groove (D35d) by the ejector (EJ) provided at the rear end of the four-step molding groove (D35d), the pipe-type discharged Four-stage chip molding (M1-40) is formed by a molded chip hanger (not shown) as shown in the five-stage molding setting diagram (P35-50) of FIG. In the state seated in the support groove D35e, a predetermined length of the opening is set to be supported by the cutting support rod H35-50 in close contact with the inner circumferential surface.                     

The support groove D35e of the fifth stage die D35-50 is formed to have a length that accommodates most of the body portion, leaving only some openings to be cut in the pipe-shaped four-stage chip molding M1-40.

Cutting support bar (H35-50) is a configuration that is controlled to move up and down and left and right to the appropriate position to support the inner circumferential surface of the opening to be partly cut without interfering with the operation of the cutting blade in the cutting process of the cutter (C35).

Pipe-shaped 4-step chip molding (M1-40) set in the 5-step die (D35-50) and the cutting support bar (H35-50) of the configuration as shown in the 5-step cutting process diagram (P35-55) of FIG. By cutting the part of the opening part according to the length of the straight part La to be molded by operating the cutter C35 up and down, the opening of the irregular circumference formed during the multi-stage impact process is cut to a certain length, Re-formed as a circumferential opening, the pipe-shaped four-stage chip molding M1-40 having an outer diameter of 4.8 mm is molded into a predetermined semifinished pipe electrode tube PM1 to be molded.

An example semi-finished pipe electrode tube PM1 molded in a series of processes as described above is discharged to the outside of the support groove D35e by the ejector EJ provided at the rear end of the five-stage die D35-50, The discharged semi-finished pipe-shaped electrode tube PM1 has a six-stage die (D35-D) with a molded hanger (not shown) such that the opening side is partially exposed, as shown in the six-step molding setting diagram (P35-60) of FIG. 16. In the state seated in the support groove (D35f) of 60, a predetermined length of the exposed opening is set to be supported by the pressing support rod (H35-60) in close contact with the inner peripheral surface.

The support groove D35f of the six-stage die D35-60 has a length such that the pressing punch H35-65 does not interfere with the stroke for crimping the inner ring P35c at the rear end of the semifinished pipe electrode tube PM1. It is formed in the, and the pressure receiving rod (H35-60) 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 (H35-65).

The semi-finished pipe electrode tube PM1 set in the six-stage die D35-60 and the crimping support bar H35-60 having the above configuration is as shown in the six-stage crimping process diagram P35-65 of FIG. When the inner ring P35c is crimped by operating (H35-65), the wire connector P35b connecting the electric wire 34 to the rear end of the inner ring P35c at the rear end of the semi-finished pipe-type electrode tube PM1. Is formed into a semi-finished pipe-shaped electrode tube (PM1a) formed.

The semi-finished pipe electrode tube PM1a 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 six-stage support groove D35f and discharged. The PM1a supports the body portion of the seven-stage die D35-70 in a state where the wire connector P35b is exposed as shown in the seventh stage molding setting diagram P35-70 of FIG. 17 by the molding hanger (not shown). In the state seated in the groove D35g, the exposed wire connector P35b is set to be supported by a piercing support rod H35-70 in close contact with the inner circumferential surface.

The seven-stage piercing support rod (H35-70) has a suitable shape to support the wire connector (P35b) without interfering with the punch blade operation stroke of the piercing punch (H35-75) 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, the upper and lower sides, without interference to the lower end of the screw hole (P35d) configuration to be.                     

The seven-stage piercing process diagram (P35-75) shown in FIG. 17 with respect to the rear end of the semi-finished pipe electrode tube PM1a set in the seven-stage die D35-70 and the piercing support rod H35-70 having the above configuration. Likewise, when the drawing operation is performed by lowering operation control of the piercing punch H35-75, the semi-finished pipe electrode tube PM1b in which the hole for the screw hole P35d is formed is formed, so that the piercing punch H35-75 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 H35-70 was sequentially removed from the lower side and the upper side. The pipe PM1b is discharged to the outside of the support groove D35g.

Subsequently, the semi-finished pipe-shaped electrode tube PM1b 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 six-step molding setting diagram of FIG. 16 (P35-60) ) And the six-step compression process diagram P35-65 of FIG. 16 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 molding chip setting process according to the forming chip setting diagram P35-10 of FIG. 11,

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. When the molding chip M1 in which distortion occurs is settled in the first stage forming groove D35a of the first mold block D35-10 having a precise diameter, interference occurs and a setting defect occurs. The distorted portion is formed by cutting chips while being cut at the distal end of the first-stage forming groove D35a to cause molding defects 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 pipe manufacturing method of the first embodiment of the present invention, before the first impact process according to the one-step impact process diagram (P35-15) of FIG.

As shown in the first stage preliminary impact setting diagram P35-7 and the preliminary impact process diagram P35-7a shown in FIG. 19, the first stage forming groove D35s of the first mold block D35-10 of the first embodiment. The first stage preformed groove (D35s) for accommodating the forming chip (M1) is installed at the previous position of the punch. The punch H35-7 is provided, and the preliminary impact process of preliminarily impact-processing the tip part of the shaping | molding chip M1 into the hemispherical shape of 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. 20, the two-stage forming groove (D35b) of the first embodiment primary mold 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 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 resulting chipped or semifinished piped electrode tubes are formed with a subtraction gradient which can be easily set and removed.

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

21 to 22 illustrate the main components provided to configure the pipe electrode manufacturing method according to the second embodiment of the present invention by changing only some processes to another configuration by applying the pipe electrode manufacturing method of the first embodiment. It is.

The second embodiment of the present invention is a pipe electrode manufacturing method is the same as the first embodiment described above in that the molding material using a brass molding chip (M), and the general process after the third step.                     

The difference is that the first step of the pipe-shaped electrode manufacturing method of the first embodiment of the present invention described above, the one-step impact process (P35-15) according to 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.

Accordingly, the first stage forming groove D35a-1 of the second embodiment mold block D35-10a for forming the semi-conical one-step chip molding M2-10 has an inner end and a diameter of the forming chip M2. It is formed in the same diameter of 4.8mm, the opening diameter is carried out in a configuration that is formed larger than the diameter of the inner end 4.8mm 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 Figure 22 is formed by the second embodiment two-step molding chip setting diagram (P35-20a) and the two-step impact process diagram (P35-25a) that is carried out subsequent to the first step impact process of the second embodiment. Embodiment 2 The shape of the two-stage chip molding, wherein the inner end is formed with a diameter of 4.8 mm equal to the diameter of the molding chip (M2), the open portion is larger than the diameter of the opening of the semi-conical one-stage chip molding (M2-10) In order to mold the semi-conical two-stage chip molding (M2-20) to a somewhat packed standard, the shape of the two-stage forming groove (D35b-1) and the two-stage punch (H35-20a) of the second embodiment is also the semi-conical two-stage. The chip 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-step chip molding (M2-10) was opened in accordance with the second embodiment two-step molding chip setting diagram (P35-20a) and the two-step 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.

23 to 25, only a part of the process of manufacturing the pipe-type electrode rod according to the first embodiment of the present invention described above is changed to another configuration, and the third embodiment is another embodiment for manufacturing the pipe-type electrode rod P35 of the example. Example The main structure of the pipe 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. The same is true in that all the steps after Step 6 are performed in the same manner.

The difference is that the size of the brass molding chip M, which is a molding material, is larger than the diameter Da of the semi-finished pipe electrode tube PM1 to be molded, and the volume is the semi-finished product to be molded. It is formed to be somewhat larger than the material volume of the pipe electrode tube PM1.

Another point is a three-step impact process diagram (P35-35) by the three-step molding chip setting diagram (P35-30) of Figure 13 of the entire process of the pipe electrode manufacturing method of the first embodiment of the present invention described above Pipe-type four-stage electrode of a predetermined length by a four-stage impact process performed by a three-stage impact process carried out and a four-stage impact process diagram (P35-45) by the four-stage molding chip setting diagram (P35-40) of FIG. By changing the process of forming the pipe (M1-40),

In addition to the third and third drawing processes of the third embodiment, the fourth and fourth drawing processes of the third embodiment, or the fifth and fifth drawing processes of the third embodiment, the pipe-shaped two-stage chip molding having a short length and a thick thickness is gradually increased in length and thickness. Is characterized by forming a pipe-type five-stage electrode tube (M3-50) of a predetermined size by thin drawing processing.

Third embodiment of the third embodiment of the present invention shown in Figure 23 pipe-shaped electrode manufacturing method used in the three-step molding chip setting diagram (P35-30b) and three-step drawing process diagram (P35-35b) Third Embodiment The third stage die D35-30c has a diameter larger than that of the semifinished pipe-shaped electrode tube PM1 in the drawing molding groove Dh1, and the third embodiment three-step drawing punch H35- The diameter of 30c) is slightly larger than the inner diameter of the pipe-type two-stage chip molding M3-20 of the third embodiment and is formed to be about twice as long.

Therefore, the third embodiment three-step drawing process of the present invention comprises the guide piece G1 between the third embodiment three-step die D35-30c and the third embodiment three-step drawing punch H35-30c of the above-described configuration. In a state where the third embodiment pipe-type two-stage chip molding (M3-20) is aligned with

Third Embodiment The third embodiment pipe-type two-stage chip molding (M3-20) is punched to the opening side of the third embodiment three-step drawing punch (H35-30c), and the third embodiment pipe-type two-stage chip molding (M3-20) By the drawing processing process of forcibly penetrating the drawing molding groove Dh1 of the die D35-30c in the third embodiment, the diameter is reduced, the length is increased, and the thickness is thinner. It is to mold the three-step chip molding (M3-30).

The third embodiment pipe-type three-stage chip molding (M3-30) molded in the above configuration is the third embodiment four-stage molding chip setting diagram (P35-40b) and the four-step drawing process diagram (P35) shown in FIG. By the four-step drawing process according to -45b), the third embodiment is molded into a pipe-shaped four-step chip molding M3-40.

The third embodiment fourth step die (D35-40c) used in the third embodiment fourth step forming chip setting diagram (P35-40b) and the fourth step drawing process diagram (P35-45b) is a drawing forming groove (Dh2). The diameter of the semi-finished pipe-shaped electrode tube (PM1) is somewhat larger than the diameter of the drawing forming groove (Dh1) of the previous process is formed in a standard, somewhat smaller than the diameter of the third embodiment step 4 drawing punch (H35-40c) Is a slightly larger than the inner diameter of the pipe-type three-stage chip molding (M3-20) of the third embodiment is about 1,5 times longer.

Therefore, the third embodiment four-step drawing process of the present invention comprises the guide piece G2 between the third embodiment four-step die D35-40c and the third embodiment four-step drawing punch H35-40c of the above-described configuration. In a state where the third embodiment pipe-type three-stage chip molding (M3-30) is aligned with

Third Embodiment Pipe-type Three-stage Chip Molding (M3-30) Punching the third embodiment four-stage drawing punch (H35-40c) to the open side, and the third embodiment Pipe-type three-stage chip molding (M3-40) By the drawing processing process of forcibly penetrating the drawing forming groove Dh2 of the die D35-40c in the fourth embodiment, the diameter is further reduced, the length is increased, and the thickness is thinner. Mold Four-step chip molding (M3-40) is to be molded.

The third embodiment pipe-shaped four-stage chip molding M3-40 formed in the above-described configuration has a third embodiment five-stage molding chip setting diagram (P35-50b) and a five-step drawing process diagram (P35) shown in FIG. By a 5-step drawing process according to -55b) to form a pipe-type 5-step chip molding M3-50.

The third embodiment fifth step die D35-50c used in the fifth step forming chip setting diagram P35-50b and the fifth step drawing process diagram P35-55b is a drawing forming groove Dh3. The diameter of the semi-finished pipe-shaped electrode tube (PM1) is formed to be the same as the diameter of the semi-finished pipe-shaped electrode tube (PM1) of the third embodiment the fifth step drawing punch (H35-50c) The diameter is formed in the same standard as the inner diameter Db of the semi-finished pipe-shaped electrode tube PM1.

Therefore, in the fifth embodiment drawing process of the third embodiment of the present invention, the guide piece G3 is formed between the fifth embodiment die step D35-50c and the third embodiment drawing step H35-50c of the third embodiment. In a state where the third embodiment pipe-type four-stage chip molding (M3-40) is aligned with                     

Third embodiment The third embodiment the fifth step drawing punch (H35-50c) by punching to the open side of the pipe-shaped four-step chip molding (M3-40), the third embodiment pipe-type five-step chip molding (M3-50) The semi-finished pipe-shaped electrode tube PM1 to be molded in diameter, length and thickness by a drawing processing process forcing the penetrating drawing molding groove Dh3 of the die D35-50c in the fifth embodiment. The third embodiment is formed in the same diameter, length and thickness to form a pipe-shaped five-step chip molding (M3-50).

As described above, the third exemplary pipe-type five-step chip molding M3-50 formed by the fifth-step drawing process according to the third embodiment of the present invention is illustrated in FIGS. The opening part cutting process of the pipe-shaped 5-step chip molding (M3-50) by the 5-step molding setting diagram (P35-50) and the 5-step cutting process diagram (P35-55) is carried out in the same manner as a subsequent step. It is molded into a semi-finished pipe electrode tube PM1 having an outer diameter of 4.8 mm.

In addition, the semi-finished pipe-shaped electrode tube PM1 having a predetermined outer diameter of 4.8 mm formed by the above processes is shown in FIGS. 16 to 17 which are carried out in subsequent steps in the first and second embodiments of the present invention. Subsequent processes, such as the compression process of the inner ring P35c and the shaping | molding process of the screw hole P35d, are performed similarly, and finally it is performed by the method of completing an example pipe type electrode rod P35.

The first, second, and third exemplary embodiments of the pipe electrode manufacturing method described above are shown in FIG. 6, which is replaced with the rod electrode 35 of the prefabricated power plug 30 shown in FIGS. 1 and 2. One example relates to a method of manufacturing a pipe electrode (P35),

These 1,2,3 embodiment pipe type electrode manufacturing methods are the pipe type electrode P45 shown in FIG. 7 used as electrodes of the mold-type power plug 40 shown in FIG.

As another method of manufacturing rod-shaped electrodes, such as the pipe-shaped electrode P65 shown in FIG. 8 used as the electrode of the power plug 60 for the adapter shown in FIGS. 5 and 6, some processes and mold apparatuses may be changed and applied. It can be done.

26 to 28 of the present invention for manufacturing the example pipe-type electrode rod (P45) shown in Figure 7, 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 form of the example pipe-shaped electrode rod P45 illustrated in FIG. 7 is the same as that of the pipe-shaped electrode rod P35 in which the overall shape is pipe-shaped, and the hemispherical portion of the tip portion P45a and a part of the straight portion are the same. The semi-finished pipe electrode tube (PM) shown in Figure 9 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. 9. 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-type electrode manufacturing method of the present invention, the molding material using a brass molding chip (M), and the first to fifth step impact processes carried out in the first embodiment of the present invention described above And forming the semi-finished pipe-shaped electrode tube PM4 by the cutting processes are identically provided.                     

The difference is that instead of the post processing processes performed on the rear end of the semifinished pipe-shaped electrode tube PM1 after the fifth step process in the first embodiment, the semi-finished pipe-shaped electrode tube PM4 and the hemispherical tip PMa are not. 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. 26 is a view illustrating a pipe electrode electrode manufacturing method according to a fourth embodiment of the present invention, which is performed in the same manner as the first to fifth step impact processes and the cutting processes according to the first embodiment of the present invention. The fourth step for the one-step reduced drawing process of forming the semi-finished pipe-shaped electrode tube PM4 formed by the above-mentioned, and forming the rear end portions other than the hemispherical tip portion PMa and a portion of the straight portion into a cylindrical cylindrical cylinder P45c of small diameter. EXAMPLE A step 1 reduced drawing setting diagram P45-50 and a step 1 reduced drawing process diagram P45-55 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 capable of inserting and fixing the tip side of the semifinished pipe-shaped electrode tube PM4 having the hemispherical tip portion P45a to the 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 fixing cylinder (P45c) to be molded into the semifinished pipe electrode tube (PM4). It is a configuration formed with a fallopian tube extension.

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 PM4 is held in the fixing groove D45a of the step 1 reduced drawing die D45-50. In the state,

 As shown in the one-step reduced drawing process diagram (P45-55), 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-type electrode tube PM4, the semi-finished pipe type The rear end of the electrode tube PM4 is punched by a punching groove R45a of the one-stage reduced drawing punch H45-50 to be punched so that the fixed cylinder P45c of a predetermined diameter is formed to have a large diameter by means of a fallopian tube extension. A semi-finished pipe-shaped electrode tube PM4-1 having a front end side and an arc-shaped boundary PM4e is carried out by a method of one-step reduction drawing molding.

Fig. 27 shows an arc-shaped boundary portion PM4e formed between the small diameter fixing cylinder P45c and the large diameter tip side with respect to the semifinished pipe electrode tube PM4-1 formed by the one-step reduction drawing process described above. 4 shows a two-stage reduced drawing setting diagram P45-60 and a two-stage reduced drawing process diagram P45-65.

The fourth embodiment, used in the two-stage reduction drawing process by the second-stage reduced drawing setting diagram (P45-60) and the two-stage reduced drawing hole degree (P45-65), in the fourth embodiment, the two-stage reduced drawing die (D45- 60 is provided with the fixing groove D45b which can fix the tip side of the semi-finished pipe type electrode tube PM4-1 with the hemispherical tip portion P45a to the boundary with the fixing cylinder P45c to be molded. Configuration,

Fourth Embodiment Step 2 The reduced drawing punch H45-60 has a cylindrical punch groove R45b of a predetermined size corresponding to the diameter and length of the fixing cylinder P45c to be molded into the semifinished pipe electrode tube PM4-1. Formed configuration.

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,

 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 type electrode tube (PM4-1), as shown in the two-stage reduced drawing process diagram (P45-65), The rear end of the pipe-shaped electrode tube PM4-1 is punched by the punch groove R45b of the two-stage reduced drawing punch H45-60 to be punched so that the fixed cylinder P45c of the predetermined diameter to be formed is a semi-finished pipe-type electrode tube. The semi-finished pipe-shaped electrode tube PM4-2 having the front end side and the straight stepped P45e of is carried out by a two-stage reduction drawing molding.

FIG. 28 is a compression drawing process for forming a fixed wheel P45d on one side of the rear end of the fixed cylinder P45c with respect to the semi-finished pipe electrode tube PM4-2 formed by the two-step reduction drawing process described above. 4 is a three-stage compression drawing setting diagram P45-70 and a three-stage compression drawing process diagram P45-75 for completing an example pipe-shaped electrode rod 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 provided with the fixing groove D45c which can pinch the front end side of the semi-finished pipe type electrode tube PM4-2 with the hemispherical tip portion P45a to the boundary portion P45e with the fixing cylinder P45c. Configuration,

Fourth Embodiment The third step of the compression drawing intermediate die (D45-75) has a structure divided into two up and down, and a support groove for supporting a part of the fixing cylinder (P45c) of the semifinished pipe-type electrode tube (PM4-2) in a penetrating state. D45d is configured with an annular expansion portion D45e that forms a half of the fixed wheel 45d at the distal end portion.

Fourth Embodiment The third step of the compression drawing punch (H45-70) is a punch groove (R45c) for supporting the rear end of the semifinished pipe electrode tube (PM4-2) to the position where the fixed wheel (P45d) is positioned. It has an annular expansion part D45f which forms half of the fixed wheel P45d, and is comprised by the 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 PM4-2 is inserted into the fixing groove D45c of the three-stage compression drawing die D45-70. With the support groove (D45d) of the three-stage compression drawing intermediate die (D45-75) supported by the holding cylinder (P45c) of the supported semifinished pipe electrode tube (PM4-2),                     

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 placed at the rear end of the fixed cylinder (P45c) of the semi-finished pipe type electrode tube (PM4-2). Punched to the side, and the rear end of the semifinished pipe electrode tube (PM4-2) was inserted into the punch groove (R45c) of the three-stage compression drawing punch (H45-70) to the annular expansion (D45e) side of the intermediate die (D45-75). By compressing, a part of the rear end portion of the intermediate member P45c is extended to the outside, and the predetermined fixing wheel P45d is formed on one side of the rear end of the fixed cylinder P45c by the annular expansion portions D45e and D45f. do.

According to the method of manufacturing a pipe type electrode rod according to the fourth embodiment of the present invention as described above, a pipe type electrode rod P45 as shown in FIG. 7 used as an electrode rod of an example mold-type power plug 40 can be manufactured. It is.

According to the pipe-type electrode manufacturing method of the present invention that can be carried out as described in the various embodiments described above, the semi-finished pipe-type electrode tube (PM) completed by some processes using a semi-finished rear end side in a later step outward By bending and forming the connecting frame P65b, the pipe electrode P65 of the example shown in FIG. 8 used as an electrode of the power plug 60 for adapters can also be manufactured.

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 above-described embodiments in order to increase the efficiency of drawing and impact processing, the processing process in a complex process, or by changing or increasing or decreasing part of the mold apparatus and manufacturing process, the shape of the rod-shaped electrode Depending on the process can also be carried out in combination with any of the mold apparatus.

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.

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 with the manufacturing method of the main process, as well as the electrode rod manufacturing method using the brass pipe of the invention, the molding chip is used while the molding material of the brass rod material is about half the cost per unit weight of the molding material. By forming a pipe-type electrode by cold impact forging machine or press with high productivity, drawing process, etc., it reduces material cost by about half and reduces the manufacturing process by drastically reducing the manufacturing cost and increases productivity by automatic productivity. It has an effect which can shape | mold the hemispherical tip part smoothly and easily.

Claims (8)

Rounding the corners of both ends of the forming chip M1 using the left and right forming chip shaping block die D35-5 having the shaping shaping groove D35r with the corners chamfered; A preliminary step of installing a one-stage preformed groove (D35s) for accommodating the convex molding chip (M1) and preliminarily impacting the tip of the molding chip (M1) into a hemispherical shape having a small diameter; After the preliminary step, the forming chip is seated between the first step forming groove (D35a) and the first step punch (H35-10), and then impacted with the first step punch to form the first step chip molding (M1-10). Stage 1; After the 1st stage chip molding is seated in the 2nd stage preformed groove (D35t), the impact processing is performed with the 2nd stage prepunch (H35-17) in which a two-stage punch rod having an outer diameter and a small outer diameter equal to the inner peripheral surface diameter of the first stage chip molding is formed. Forming a two-stage preliminary chip molding (M1-17); After the two-stage preliminary chip molding is seated between the two-stage forming groove (D35b) longer than the length of the first-stage forming groove (D35b) and the two-stage punch (H35-20) longer than the first-stage punch and having a larger diameter, 2 Impacting with a step punch, a second step of forming a two-step chip molding (M1-20); The two-stage chip molding is seated between a three-stage forming groove (D35c) longer than the two-stage forming groove and having the same diameter, and a three-stage punch (H35-30) longer than the two-stage punch and having a larger diameter, and then impacts the length. A third step of molding the three-stage chip molding M1-30 which is extended to about half the length of the semi-finished pipe electrode tube PM; The three-stage chip molding is placed between the four-stage forming groove (D35d) longer than the three-stage forming groove (D35d) and the four-stage punch (H35-40) longer than the semi-finished pipe electrode tube (PM), and then impacted. And forming a semi-finished pipe-shaped electrode tube (PM1) and forming a semi-finished pipe-shaped electrode tube to form a pipe-shaped electrode rod for a power plug. The method of claim 1, The fourth step of forming the pipe-shaped electrode rod for the power plug, A seventh step of forming a prefabricated power plug-type electrode rod (P35) by forming a screw hole (P35d) is a screw thread is formed on the rear end of the semi-finished pipe electrode tube (PM1a) formed through the fourth step Method for producing a pipe-type electrode rod for a power plug comprising a. The method of claim 1, The fourth step of forming the pipe-shaped electrode rod for the power plug, The semi-finished pipe-shaped electrode tube formed through the fourth step, the diameter of the hemispherical end portion (P45a) is the same as the diameter (D) of the semi-finished pipe-type electrode tube, the fixed tube (P45c) is an intermediate member connected to the hemispherical end portion Diameter D1) is formed to be smaller than the diameter of the semi-finished pipe electrode tube, and the rear end portion of the fixing tube is formed with an annular fixed ring projecting outwardly to form a pipe-shaped electrode rod for a molded power plug (P45). Method for producing a pipe-type electrode rod for power plug, characterized in that the molding). The method of claim 1, wherein the forming chip is made of brass. delete delete delete delete

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