WO2017039366A1

WO2017039366A1 - Pipe expanding punch

Info

Publication number: WO2017039366A1
Application number: PCT/KR2016/009817
Authority: WO
Inventors: 정구왕
Original assignee: 정구왕
Priority date: 2015-09-02
Filing date: 2016-09-02
Publication date: 2017-03-09
Also published as: US20180257124A1; JP6542984B2; JP2018527191A

Abstract

The present invention relates to a pipe expanding punch and, more particularly, to a pipe expanding punch for a drill which can expand a pipe by hitting the pipe by means of an anchor drill or a rechargeable drill. The pipe expanding punch according to an embodiment of the present invention comprises: an expanding ball in which one or more portions (hereinafter referred to as "an expanding part") having an outer diameter larger than an inner diameter of a pipe to be expanded are formed; and a holder which is formed integrally with the expanding ball and fixedly coupled to a drill so that the pipe can be expanded by means of the drill, wherein the outer diameter of an introduction part of an end portion of the expanding ball is formed to be smaller than the inner diameter of the pipe, a tapered first step is formed between the introduction part and the expanding part, and the tapered first step is polished, thereby having one or more polished surfaces formed thereon.

Description

Pipe expansion punch

The present invention relates to a pipe expansion punch, and more particularly, to a pipe expansion punch for a drill that allows the pipe to be expanded by rotation or hitting using an anchor drill or a filling drill.

Generally, home appliances such as refrigerators, air conditioners, water purifiers, etc. are provided with a refrigeration cycle for cooling.

In the refrigeration cycle of home appliances that are commonly used, the compressor and the condenser are connected to the connecting pipe, the condenser and the evaporator are connected to the capillary via the refrigerant supply pipe, and the evaporator and the compressor are connected to the suction pipe.

The refrigeration cycle includes a compressor for compressing a gaseous refrigerant at high temperature and high pressure, a condenser for condensing the high temperature and high pressure refrigerant gas discharged from the compressor, and a low temperature and low pressure liquid refrigerant passing through a capillary tube through the condenser. Evaporator absorbs latent heat and cools.

The refrigeration cycle is such that the refrigerant is circulated from the evaporator to the evaporator through the condenser and capillary by the drive of the compressor.

In addition, the connection pipe, the refrigerant supply pipe, the capillary pipe, and the suction pipe provided in the refrigeration cycle are made of copper pipes, etc., in order to facilitate the connection, the tip of the pipe is expanded to a predetermined diameter to insert one pipe into another pipe. It is connected by welding in a state.

In order to expand the pipe, the inner diameter and the outer diameter of the pipe must be expanded at the same time by inserting the expansion ball of a rigid material having an outer diameter larger than the inner diameter of the pipe to be expanded, and the expansion ball is used to be coupled to the rod desired by the rod. .

In the case of pipe expansion in the field using a conventional expansion ball, the outer diameter of the expansion ball is formed in a stepwise manner for each pipe size and inserted into the pipe, and then the rod bar coupled to the expansion ball is hit with a hammer or the like while the pipe is fixed. Expansion work was performed.

By the way, the conventional expansion ball outer diameter is made of a round shape has a problem that a lot of heat is generated when the expansion work is received, the pipe is not well expanded.

In addition, the hand holding a hammer, such as hitting manually, there was a problem that the activity of the expansion of the heavy hammer is not free to carry the heavy hammer.

The present invention has been made in order to solve the above-mentioned problems, integrally formed with an elliptical expansion ball and a holder to be expanded by a drill, so that less heat is generated during expansion work and the pipe is well expanded It is intended to provide a pipe expansion punch that is easy to use because it uses less power and does not have to carry a hammer.

Pipe expansion pipe punch according to an embodiment of the present invention for achieving the above object, expansion pipe which is provided with one or more portions (hereinafter expansion pipe) having an outer diameter larger than the pipe inner diameter to be expanded;

A holder formed integrally with the expansion tube and fixedly coupled to the drill so as to expand the pipe using the drill; Including,

The outer diameter of the introduction portion of the expansion pipe end is formed smaller than the inner diameter of the pipe, a tapered first step is formed between the introduction portion and the expansion pipe,

The tapered first step may be polished to form one or more polishing surfaces.

In addition, the outer diameter of the expansion portion is characterized in that it is made of a round ellipse shape, the radius is not the same.

In addition, when two or more expansion pipes are provided, a tapered second step is formed between the two expansion pipes, and the tapered second step is polished to form one or more polishing surfaces.

In addition, the outer circumferential surface of the expansion tube is characterized in that the left screw portion or the right screw portion formed alternately with the screw bone in the left screw direction or the right screw direction is formed.

In addition, the screw thread is characterized in that the outer shape rounded.

In addition, the width of the screw thread is characterized in that it is formed wider than the width of the screw bone.

In addition, when the introduction portion is to the left side and the right-hand screw portion, the screw bone is formed in a diagonally upward direction from the upper left to the lower right side of the first and second stepped portions of which the radius is relatively small, and the introduction portion is to the left and is the left screw portion. In this case, the first and the second step of the relatively small radius is characterized in that the screw bone is formed on the lower side of the diagonal line passing from the upper right side to the lower left side.

In addition, when the expansion ball is divided into four horizontally and vertically, a portion of the front upper quadrant of the narrow surface having a relatively large radius along the rotational direction of the expansion ball based on the vertical line is spread over the plurality of expansion parts and the first and second steps. Characterized in cut flat.

In addition, the polishing surface is characterized in that formed on the tapered first and second step of the narrow surface relatively large radius.

And the holder is made of a hexagonal rod as a shape that can be coupled to the socket of the filling drill,

As a shape that can be coupled to the socket of the anchor drill, the fitting groove is formed to correspond to the outer circumferential surface of the round bar, characterized in that the fixing groove is formed to correspond to the outer peripheral surface between the fitting groove.

According to the above-mentioned means to solve the problem, the expansion ball formed in the outer diameter of the elliptical shape, and the holder to allow the expansion by using the drill integrally formed, less heat during expansion work and pipe expansion is good, drill It is easy to use because it uses less power and does not have to carry a hammer.

1 is a perspective view of a pipe expansion punch according to a first embodiment of the present invention.

FIG. 2 is an exemplary view showing an outer diameter of the expansion ball shown in FIG. 1. FIG.

3 is a perspective view of a pipe expansion punch according to a second embodiment of the present invention.

4 and 5 are exemplary views showing the outer diameter of the expansion ball shown in FIG.

FIG. 6 is a view showing a pipe expanding operation using the pipe expanding punch shown in FIG. 3.

7 and 8 are front views of the expansion ball according to a third embodiment of the present invention.

9 and 10 are front views of the expansion ball according to the fourth embodiment of the present invention.

11 and 12 are front views of the expansion ball according to the fifth embodiment of the present invention.

13 is another side view of the expansion ball according to the present invention.

Hereinafter, the configuration and operation of the present invention will be described with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view of a pipe expansion punch according to a first embodiment of the present invention, and Fig. 2 is an exemplary view showing the outer diameter of the expansion ball shown in Fig. 1 and is a drawing of the expansion punch when used in a filling drill.

As shown in FIG. 1, the expansion punch 10 according to the first embodiment of the present invention includes the expansion ball 20 and the holder 30 integrally formed of a solid material.

The expansion ball 20 is formed with an expansion pipe portion 22 having an outer diameter larger than the inner diameter of the pipe to be expanded, and the introduction portion 24 of the end of the expansion ball 20 has an outer diameter thereof so as to facilitate the insertion of the pipe. It is formed smaller than the inner diameter of.

In addition, a tapered step 26 is formed between the expansion pipe 22 and the introduction portion 24 to facilitate expansion of the pipe.

At this time, the tapered step 26 is polished to form at least one polishing surface 120.

On the other hand, the outer diameter of the expansion tube 22 has an elliptical shape, which is a round circle with a radius not the same.

For example, as shown in FIG. 2, when the outer diameter of the expansion pipe 22 is 16.7 mm, the radius R is not constant as 8.85, but the radii are different as 8.35, 8,85, and 9.6, and the radius is not constant. Is made in the form of a round circle.

The holder 30 is to be fixed to the corded drill to be used, as a shape that can be coupled to the socket of the corded drill, consisting of a hexagonal rod.

The expansion tube 20 and the holder 30 is integrated into one, but between the expansion tube 20 and the holder 30 is provided with a stopper 40 having an outer diameter larger than the outer diameter of the expansion tube 22, the pipe is Do not expand anymore.

On the other hand, the filling drill is mainly used for drilling holes by rotation, and in the present invention, the pipe is expanded by the impact or rotation of the expansion punch 10 using an impact driver.

Figure 3 is a perspective view of a pipe expansion punch according to a second embodiment of the present invention, Figure 4 and Figure 5 is an exemplary view showing the outer diameter of the expansion ball shown in Figure 3, the expansion punch in the case of using an anchor drill. .

As shown in FIG. 3, the expansion punch 50 according to the second embodiment of the present invention includes the expansion ball 60 and the holder 70 integrally formed of a hard material.

The expansion ball 60 has two expansion parts having an outer diameter larger than the pipe inner diameter to be expanded so that two pipes having different inner diameters can be expanded with one expansion punch 50 (first and second expansion portions 61). 62), and a tapered stepped portion 64 is formed between the first expansion portion 61 and the second expansion portion 62 to facilitate expansion of the pipe.

In addition, in order to facilitate the insertion of the pipe, the introduction portion 63 of the end of the expansion ball 60 has a smaller outer diameter than the inner diameter of the pipe, and the expansion of the pipe also occurs between the second expansion portion 62 and the introduction portion 63. A tapered step 65 is formed to facilitate this.

At this time, the outer diameter of the first expansion portion 61 and the second expansion portion 62 has an elliptical shape of a round circle whose radius is not constant.

For example, as shown in FIG. 4, when the outer diameter of the second expansion part 62 is 7 mm, the radius R is not constant at 3.5, and the radii are different from 3.43, 2,88, and 4.8, and the radius is different. It is not the same, but in the form of a round circle.

In addition, as shown in FIG. 5, when the outer diameter of the first expansion unit 61 is 10.5 mm, the radius R is not constant at 5.25, and the radii are different from each other at 5.18, 4, 63, 6.55, and 5.25. It consists of a round circle with the same radius.

The holder 70 is to be fixed to the anchor drill to be used, it is a shape that can be coupled to the socket of the anchor drill, the fitting groove 72 is formed to correspond to the outer circumferential surface of the circular rod, the fitting groove The fixing groove 74 is formed to correspond to the outer peripheral surface between the 72.

At this time, the fitting groove 72 is formed from the circular round rod end to the middle, and the fixing groove 74 is formed during the circular round bar.

The expansion ball 60 and the holder 70 are integrated into one, but between the expansion ball 60 and the holder 70 has an outer diameter larger than the largest diameter of the expansion ball, that is, the outer diameter of the first expansion portion 61. A stopper 80 having a stop is provided so that the pipe is no longer expanded.

On the other hand, the anchor drill is used for the purpose of drilling holes by hitting or rotating to expand the pipe.

As shown in FIG. 6, in the fixed state of the pipe P so as not to move, the holder 70 of the expansion punch 50 is fixedly coupled to the anchor drill B, and an introduction portion, which is an end of the expansion ball 60, 63) face the inner diameter of the pipe.

Next, the

expansion part

61 or 62 of the expansion ball 60 having an outer diameter larger than the inner diameter of the pipe P is inserted into the pipe P through the expansion punch 50 by the heading operation of the anchor drill B. By doing so, the inner diameter and the outer diameter of the pipe P are simultaneously expanded and expanded.

As shown in FIG. 7, the expansion ball 100 having an elliptical shape having a round circle having a constant radius is larger than the pipe inner diameter to be expanded so that two pipes having different inner diameters can be expanded with one expansion punch. Two expansion pipes (first and second expansion pipes 101 and 102) having a large outer diameter are formed, and a tapered portion is formed between the first expansion pipe 101 and the second expansion pipe 102 to facilitate pipe expansion. Step 104 is formed.

In addition, in order to facilitate the insertion of the pipe, the introduction portion 103 at the end of the expansion ball 110 has a smaller outer diameter than the inner diameter of the pipe, and also expands the pipe between the second expansion portion 102 and the introduction portion 103. A tapered step 105 is formed to facilitate this.

The screw thread 111 and the thread 112 are formed on the outer circumferential surface of the expansion ball 100 configured as described above, and the thread 112 is formed so that the residue (foreign material) does not occur during expansion. Rounded outwards.

In addition, the narrow surface of the tapered stepped

portion

104 and 105 having a relatively larger radius is polished to smoothly expand, thereby forming at least one polishing surface 120 having an approximately equilateral trapezoidal shape.

The right hand thread 110 reduces the friction by reducing the contact area with the pipe to reduce the friction by minimizing the frictional heat inside the pipe to facilitate expansion, and damage the pipe by the round thread 112 during expansion This can reduce the incidence of foreign objects.

As shown in FIG. 8, the expansion ball 100 having an elliptical shape of a round circle having a constant radius is larger than the pipe inner diameter to be expanded so that two pipes having different inner diameters can be expanded with one expansion punch. Two expansion pipes having an outer diameter (first and second expansion pipes 101 and 102) are formed, and a tapered step between the first expansion pipe 101 and the second expansion pipe 102 to facilitate pipe expansion. 104 is formed.

The outer circumferential surface of the expansion ball 100 configured as described above is formed with the left screw portion 130 in which the screw bone 131 and the thread 132 are alternately formed in the left screw direction, and the screw thread 132 is outside so that no residue is generated during expansion. Rounded shape.

In addition, the narrow surface of the tapered stepped

portion

104 and 105 having a relatively larger radius is polished to smoothly expand, so that at least one polishing surface 120 having an approximately equilateral trapezoidal shape is provided.

The left screw portion 130 reduces the contact area with the pipe to reduce the friction by reducing friction to minimize the frictional heat inside the pipe, while reducing the friction, the pipe breakage by the round thread 132 during expansion This can reduce the incidence of foreign objects.

The right screw portion 110 is advantageous for expanding a pipe having a small inner diameter and a thin thickness, and the left screw portion 130 is advantageous for expanding a pipe having a large inner diameter.

9 and 10 are front views of the expansion ball according to the fourth embodiment of the present invention, Figure 9 shows a wide surface with a relatively small radius of the elliptical expansion ball, Figure 10 shows a narrow surface with a relatively large radius. .

7 is a width of the screw bone 111 of the right hand threaded portion 110 is formed wider than the width of the screw thread 112, in Figures 9 and 10 of the fourth embodiment the width of the screw bone 111 of the right hand thread 110 It is formed narrower than the width of the thread 112.

In addition, the tapered stepped

portions

104 and 105 of the wide surface having a relatively small radius are polished in a round plane (represented by dashed lines) so as to be smoothly formed, and at least one polished surface 120 having an approximately equilateral trapezoidal shape is formed. do.

In this case, the first step (104, 105) to the grinding surface 120 to form the first surface to be processed first, then the threaded bone 111 is processed and then chamfered to the left and right side.

This prevents sludge and reduces heat generation.

In addition, as shown in FIG. 10, the position of the screw bone 111 having a relatively large radius has a great influence on the ease of expansion, and when the inlet 103 is directed to the left side, the

step

104 and 105 are lowered from the upper left to the lower right. Make a threaded bone 111 in the upward direction of the diagonal (ab, cd) of the side (see in the figure, ab, cd right direction) to make the driving force to facilitate expansion while the hatched portion rotates.

11 and 12 are front views of the expansion ball according to the fifth embodiment of the present invention, Figure 11 shows a wide surface with a relatively small radius of the elliptical expansion ball, Figure 12 shows a narrow surface with a relatively large radius. .

8 is a width of the screw bone 131 of the left screw portion 130 is formed wider than the width of the screw thread 132, Figures 11 and 12 of the fifth embodiment is the width of the screw bone 131 of the left screw portion 130 It is also formed narrower than the width of this thread (132).

In addition, the tapered stepped

portions

104 and 105 of the wide surface having relatively small radii of FIG. 11 are polished in a rounded plane (indicated by dashed lines) to smoothly expand the pipe, thereby forming at least one polished surface 120 having an approximately equilateral trapezoidal shape. do.

In this case, the first step (104, 105) to the polishing surface 120 is formed in a round plane first to produce a threaded bone 131 and then chamfered to the left and right screw bones (131).

This prevents sludge and reduces heat generation.

In addition, as shown in FIG. 12, the position of the screw bone 131 having a relatively large radius has a great influence on the ease of expansion, and when the inlet 103 is directed to the left side, the stepped 104 and 105 may be disposed from the upper left to the lower left. The threaded bone 131 is made in the downward direction (left side of ab, cd in the drawing) of the side passing by the diagonal line (ab, cd), so that the hatched portion is rotated to facilitate the expansion.

Figure 13 is another side view of the expansion ball shown in accordance with the present invention.

When the expansion ball is divided into four horizontally and vertically in the elliptical expansion ball 100 having a circular circle with a constant radius, a part of the upper quadrant of the rotation direction of the narrow surface having a relatively large radius based on the vertical line Cut it off.

That is, as shown in FIG. 13, when the expansion ball 100 rotates in the counterclockwise direction, the portion of the four quadrants cuts flat from about 10 o'clock to 12 o'clock, and conversely, when the clockwise rotation rotates in the clockwise direction, about 12 of the first quadrant. Cut the 2 o'clock part of the poem flat.

This cutting is performed on the first and

second expansion portions

101 and 102 and the tapered stepped

portions

104 and 105 except for the introduction portion 103 in FIGS. 9 and 10 and 11 and 12.

This makes it possible to expand pipes easily and reduce heat generation even with a small force and a small number of revolutions of the drill.

Claims

Expansion pipe which is provided with one or more portions (hereinafter expansion portion) having an outer diameter larger than the inner diameter of the pipe to be expanded;

A holder formed integrally with the expansion tube and fixedly coupled to the drill so as to expand the pipe using the drill; Including,

The outer diameter of the introduction portion of the expansion pipe end is formed smaller than the inner diameter of the pipe, a tapered first step is formed between the introduction portion and the expansion pipe,

And the tapered first step is polished to form at least one polishing surface.
The method of claim 1,

The outer diameter of the expansion pipe is a pipe expansion punch, characterized in that the radius of the same shape, made of a round ellipse.
The method of claim 1,

When two or more expansion pipes are provided, a tapered second step is formed between the two expansion parts, and the tapered second step is polished to form at least one polishing surface.
The method of claim 3,

A pipe expansion punch, characterized in that the outer peripheral surface of the expansion ball is formed with a left or right threaded portion formed with alternating screw bones and threads in a left or right screw direction.
The method of claim 4, wherein

The pipe thread punch, characterized in that the thread is rounded outward.
The method of claim 4, wherein

The pipe expansion punch, characterized in that the width of the screw thread is formed wider than the width of the screw bone.
The method of claim 4, wherein

When the introduction portion is to the left and the right-hand screw portion, the screw bone is formed in a diagonally upward direction from the upper left to the lower right portion of the first and second stepped portions of which the radius is relatively small, and when the introduction portion is to the left and the left screw portion is a radius A pipe expansion punch, characterized in that a screw valley is formed below a diagonal line passing the first and second step of the relatively small wide surface from the upper right to the lower left.
The method of claim 3,

When dividing the expansion ball into four horizontally and vertically, a portion of the front upper quadrant of the narrow surface having a relatively large radius along the rotational direction of the expansion ball based on the vertical line is flat across the plurality of expansion parts and the first and second steps. Pipe expansion punch characterized by cutting.
The method of claim 3,

And the polishing surface is formed on the tapered first and second steps of a narrow surface having a relatively large radius.
The method of claim 1,

The holder is made of a hexagonal rod as a shape that can be coupled to the socket of the filling drill,

A pipe expansion punch, characterized in that the fitting groove is formed on the outer circumferential surface of the round bar to correspond to the socket of the anchor drill, the fixing groove corresponding to the outer circumferential surface between the fitting groove.