KR920005943B1 - The making method of gas inlet tube - Google Patents

Abstract

The method is used for manufacturing a gas supply tube for a gas lighter by use of a cold plastic working instead of a conventional machining process. The method comprises a step of holding a rod workpiece (A) by for warding a rod holder (32); a step of cutting the rod workpiece (A) by actuating a cutting punch (31), and feeding the cut workpiece (B) to the position between a first die (10) and a second die (20); pressing the first die (10) toward the second die (20) while moving the cutting punch (31) and the holder (32) backward, and forming the pressed workpiece (C) having a contraction part (41) and a expansion part (42); a step of moving the first die (10) backward from the second die (20).

Description

Manufacturing method of gas inlet pipe for gas writer

1 is a cross-sectional view showing a manufacturing process according to the present invention, (a) is a cross-sectional view showing a first step, (b) a cross-sectional view showing a second step, (c) a cross-sectional view showing a third step, (d) Is a cross sectional view showing a fourth step, (e) is a cross sectional view showing a fifth step, (f) is a cross sectional view showing a sixth step, (g) is a cross sectional view showing a seventh step, and (h) is a eighth step. Section view.

2 is a partially cutaway perspective view of the finished product produced according to the present invention.

3 is a cross-sectional view showing a second mold used in a modified embodiment of the present invention.

4 is a cross-sectional view showing a finished product manufactured by a modified embodiment of the present invention.

5 is a perspective view of FIG.

* Explanation of symbols for main parts of the drawings

10: first mold 11, 12: raw material work

13: pin swing hole 14: pin head ball

15, 26: blow ball 16, 27: pin head

17: pin 18, 29: spring

20: second mold 21: cutting die

22: enlarged hole 23: reduced hole

24: extraction pin swing hole 25: extraction pin head hole

28: extraction pin 30: stopper

The present invention relates to a method for producing an inlet pipe of a gas inlet for use in gas filling in a gas writer. In general, the gas inlet of the gas writer is divided into a screw coupling failure type and a press-fit fixing type according to the assembly coupling method. The screw coupling fixed type is fitted with the spring receiver in the state in which the inlet pipe is held in the spring on the inner side of the threaded body formed on the outer circumference, and the packing is fitted on one side of the outer circumferential surface of the inlet pipe to enable airtightness. In the case of the press-fit fixed type, the inlet pipe is inserted into the inlet body while being held by the spring and is sealed by the packing and the O-ring. In the case of the screw coupling fixed type and the press-fit fixed type both require an inlet pipe, the present invention relates to a method for manufacturing an inlet pipe applied to all the above-described form.

In manufacturing a gas inlet pipe of a conventional gas inlet, a finished product is obtained by cutting a surface shape with a bite in an automatic lathe or a dedicated processing machine and drilling a gas outlet hole and a valve hole with a drill. However, in such a conventional manufacturing method, all the processes as described above are cut with cutting tools such as bites and drills, which adds enormous economic burden due to the additional equipment cost of such a device and causes waste of manpower and time. Not only could not improve efficiency and productivity, but also the processing part of the valve nozzle was not precise, there was a disadvantage that the gas leaks.

The present invention has been made to solve the above-mentioned fedans and problems, the main purpose is to improve the conventional complex and sophisticated cutting process to adopt plastic processing to obtain a semi-finished product by a series of continuous batch process It is to provide a simple and easy inlet pipe manufacturing method of the inlet.

Another object of the present invention is to improve the precision and surface roughness of the processing portion by the plastic processing of the precision of the processing portion of the conventional product, eliminating enormous additional equipment cost or work efficiency and productivity impediment to improve work efficiency and productivity Finally, the present invention provides a method for manufacturing a gas inlet pipe in which cost is reduced.

In order to achieve the above object by the present invention, based on the fact that the metal used as the material of the inlet pipe, for example, copper alloy can be cold worked even with each other, the round bar material as a series of processes based on cold baking processing According to the manufacturing method to obtain the finished product through the separate process of cutting semi-finished products in a series of continuous processes by cutting them to the same length as the volume, and forming a series of main grooves and valve holes. .

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings. As shown in (b) to (h) of FIG. 1, the main part of the manufacturing apparatus for explaining the method of manufacturing the injection port pipe of the gas inlet according to the present invention includes the first mold 10 and the second mold 20. do.

The first mold 10 has a raw material hole 11 is formed in the upper portion and the raw material hole 12, the pin fluctuation hole 13, the pin head hole 14 and the blow hole formed with an inclined portion (2a) at the bottom of the first mold (10) It has the pin hole which consists of 15, the pin 17 formed integrally with the flange-shaped pin head 16, and the spring 18 which supports the pin head 16. As shown in FIG.

The second mold 20 positioned opposite to the first mold 10 has a cutting die 21 fixedly attached to one side thereof, and includes an enlarged hole 22, a reduced hole 3, and an extraction pin swing hole 24. , The extraction pin head 25 and the blow hole 26 is coupled to each other extraction pin ball, a flange-shaped pin head 27 formed integrally with the extraction pin 28 and the spring to support the pin head 27 ( 29) is configured.

Meanwhile, the cutting die 21 is formed with a cutting hole 21a having an inclined portion formed therein, and a stopper 30 formed at the front thereof. The cutting die 21 is fixedly attached to one side of the forging molding machine, which is not shown. Is stopped at the stopper 30 through the cutting hole 21a of the cutting die 21.

In the figure, reference numeral 31 is a cutting punch fixed to the ram of the forging molding machine (not shown), 32 is a round bar material holding hole for holding the cut round bar material (A) on one side.

Next, with reference to the manufacturing process shown in Figure 1 will be described with respect to the manufacturing method of the inlet pipe of the present invention gas inlet.

(A) of FIG. 1 shows a 1st process in a manufacturing process, which retracts the cutting punch 31 and draws the wound round material A to the position of the same length as the valve nozzle volume by a draw roller (not shown). It is a step of holding the round bar material (A) by advancing the round bar material holding strip (32) in contact with one side of the installed stopper (30).

(B) of FIG. 1 shows a second process, wherein the cutting punch 31 is advanced to cut the round bar material A, and the primary punch is cut together with the cutting punch 31 and the round bar material holding strip 32. The material B is transferred to be positioned between the atom providing 11 of the first mold 10 and the extraction pin hole of the second mold 20.

(C) of FIG. 1 shows a 3rd process, and horizontally pressurizes the 1st mold 10 to the 2nd mold 20 of the right side, retracting the cutting punch 31 and the round bar material holding | disconnecting strip 32. FIG. It is a process of shaping | molding the secondary-processed raw material C which formed the reduction part 41 and the expansion part 42.

(D) of FIG. 1 shows a fourth process, from the second mold 20 to the first mold 10 in a state in which the second processed material C is coupled to the extraction pin hole of the second mold 20. ) Is the process of retreating.

(E) of FIG. 1 shows a fifth process, wherein the first mold 10 is raised so that the pin hole of the first mold 10 and the extraction pin hole of the second mold 20 coincide with each other. The process of processing the raw material D of the tertiary processed semi-finished product which formed the inclination part 43 and the gas outlet hole 44 by hitting the pin 17 of the metal mold | die 10 is carried out.

(F) of FIG. 1 shows the sixth process, while the pin 17 of the first mold 10 is returned to its original position by the elastic force of the spring 18 while the first mold 10 is horizontally retracted and transferred. The extraction pin 28 of the second mold 20 is hit to extract the material D of the semi-finished product from the second mold 20.

(G) of FIG. 1 shows a seventh process, and the first mold 10 is lowered so that the raw material hole 11 of the first mold 10 and the extraction pin hole of the second mold 20 are aligned horizontally. At the same time, the extraction pin 28 is returned to its original position by the elastic force of the spring 29 to finish the preparation step for performing the first process.

(H) of FIG. 1 shows the 8th process, the main groove 45 is processed by the lathe of the semi-finished material D extracted from the 2nd mold 20, and the valve hole 46 is drilled with a drill. To obtain a finished product.

As described above, the present invention manufactures the raw material (D) of the semi-finished product in a series of continuous processes ranging from the first step to the seventh step, and then manufactures the injection hole of the finished product through a separate eighth step, and these processes The injection inlet tube completed through is as shown in FIG. 3 to 5 show a modified embodiment of the present invention, and FIG. 3 shows a second mold 20 used in the modified embodiment.

This is the same as each other except that the reduced portion 41 of the valve nozzle is removed by removing the reduced hole 23 of the extraction pin hole in the second mold 20 used in the above-described embodiment.

4 and 5 show a modified embodiment manufactured according to the present invention, except that the reduction portion 41 is removed in the third step of the above-described process, and the expansion portion 42 and the gas outlet hole ( 14), the inlet pipe of the gas inlet consisting of the inclined portion 43, the circumferential groove 45 and the valve hole 46 is shown.

The present invention made in this way is made of a copper alloy used as a material for manufacturing the inlet pipe of the gas inlet, for example, the excellent physical properties of the brass and by using a property that is easy to forge at room temperature, by a simple and easy manufacturing process It is an industrially useful invention for improving the precision and surface roughness of the processing part, as well as cost reduction by greatly improving work efficiency and productivity.

Claims (1)

The cutting punch 31 is retracted and the wound round material A is wound by a draw roller (not shown) to be brought into contact with one side of the stopper 30 installed at the same length as the nozzle volume, and the round bar material holding strip 32 The first step of holding the round bar material (A) by advancing; The cutting punch 31 is advanced to cut the round bar material A, and the primary punched raw material B is cut along with the cutting punch 31 and the round bar material hole sphere 32. A second step of transporting to be positioned between the extraction pin hole of the second mold 20 and the second mold 20; Retracting the cutting punch 31 and the round bar material holding zone 32 while the first mold 10 is horizontally pressurized to the second mold 20 on the right side to form a reduced portion 41 and an enlarged portion 42. A third step of molding the secondary processed material (C); A fourth step of retracting the first mold 10 from the second mold 20 in a state in which the second processed material C is coupled to the extraction pin hole of the second mold 20; Raising the first mold 10 by raising the first mold 10 so that the pin hole of the first mold 10 and the extraction pin hole of the second mold 20 coincide, and then presses the pin 17 of the first mold 10 while the inclined portion A fifth step of processing the raw material (D) of the third processed semi-finished product having the 43 and the gas outlet holes 44; While moving the first mold 10 horizontally, the pin 17 returns to its original position by the elastic force of the spring 18 and at the same time strikes the extraction pin 28 of the second mold 20 to make a semi-finished material (D). A sixth step of extracting from the second mold 20; The first mold 10 is lowered so that the raw material hole 11 of the first mold 10 and the extraction pin hole of the second mold 20 coincide horizontally, and at the same time, the extraction pin 28 of the spring 29 A seventh step of returning to the original position by the elastic force and finishing the preparation step for performing the first step; An eighth process of sequentially processing the main groove 45 with the semi-finished material D extracted from the second mold 20 by lathe and drilling the valve hole 46 with a drill to obtain a finished product; Method for producing an inlet pipe of the gas inlet in the gas writer, characterized in that consisting of.

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