KR101839570B1 - Round bar cutting device - Google Patents

Abstract

The present invention relates to a cutter for cutting a round bar which comprises: a holder unit; a blade unit coupled to an upper end of a front surface of the holder unit, of which an upper side is formed in an opened arc shape, and wherein a stepped protrusion in a shape of being recessed in the inner direction is provided in both lateral ends of the blade unit; a coupler individually coupled to lateral surfaces formed on an upper end of the front surface of the holder unit and an upper end of the stepped protrusion so as to prevent the blade unit from being detached from the holder unit; and a guide unit coupled to a rear surface of the holder unit, and of which an upper side is formed in the opened arc shape.

Description

ROUND BAR CUTTING DEVICE}

The present invention relates to a cutter for round bar cutting.

More specifically, in cutting a heated round bar having a relatively large diameter through a hot forging apparatus, the holder portion and the blade portion are detachably attached to each other by a coupling hole and a fixing screw, The present invention also relates to a cutter for cutting a circular bar so that only the blade part can be partially exchanged in a state in which an alignment of the holder part itself coupled to the hot forging device is maintained.

Generally, a round bar cutting bar is provided in a pushing device of a hot forging device provided with a press operated up and down, and is used for cutting a round bar into a predetermined length through a process of moving up and down.

Generally, such a cutting tool is formed as an integral unit, and an upper portion is formed with an engaging portion to be engaged with a pressurizing portion and a lower portion is formed with a blade for cutting the round bar. In the hot forging apparatus, Repeatedly, abrasion of the blade portion easily occurs. At this time, the entire blade is exchanged from the hot forging device, and the blade is replaced.

The process of replacing the blade is such that the alignment of the cutter is maintained at the correct position so that the cut surface of the heated round bar can be formed uniformly and then joined to the hot forging apparatus. The wear is often caused by the repeated cutting of the wiper blade, so that the replacement work must be performed from time to time.

Furthermore, as the waiting time for the operation of the hot forging device is delayed due to the frequent repetition of the replacement operation, it is necessary to align the cutting tool every time, so that a large amount of energy is consumed to maintain the high temperature for heating the round bar , There is a problem in that the amount of cutting work of the round bar is insufficient depending on the time delay of aligning the alignment.

That is, in order to replace the cutting tool, it is necessary to separate the cutting tool from the hot forging device and then perform processes such as unwinding, welding, machining, and heat treatment, so that the work process is complicated and the cost of re- , There is a problem that the productivity of the product deteriorates.

Korean Registered Patent No. 10-1725907 (Apr. Korean Patent Publication No. 10-2017-0056116 (May 27, 2017). Korean Patent Registration No. 10-0808218 (Feb. 21, 2008) Korean Registered Patent No. 10-1485332 (January 16, 2015)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to provide a hot forging apparatus for cutting a heated round bar having a relatively large diameter, And is detachably attached by a fixing screw so that when the blade portion is worn out due to the cutting operation, only the blade portion can be partially replaced in a state in which the alignment of the holder portion itself coupled to the hot forging device is maintained, To provide a cutting tool.

Another problem to be solved by the present invention is that the holder portion is made of a metal material and the blade portion for cutting the heated round bar is made of a stellite material so that even when heated in a hot forging apparatus, And a holder portion for supporting the blade portion is made of a metal material so that the volume of the blade portion made of a stellite material can be reduced so that the cost of the cutting tool can be minimized.

Another problem to be solved by the present invention is to provide a method and apparatus for cutting a round bar in which a rounded end of a holder is rounded in order to minimize contact between a cut portion of a heated round bar and a holder, And the outer peripheral surface of the round bar can be prevented from being damaged or damaged by damping the impact even when the contact is generated.

Another problem to be solved by the present invention is to provide a guide unit having a rounded end at its holder so that when the round bar contacts the guide unit and breakage occurs in the guide unit, and the guide part can be partially replaced only in a state in which the alignment is maintained.

According to an aspect of the present invention, there is provided a cutter for cutting a circular bar including: a holder; A blade portion coupled to an upper end of a front side of the holder portion and having an arc shape opened at an upper side, A coupling unit coupled to the top surface of the step and both side surfaces formed at the top of the front side of the holder unit to prevent the blade unit from separating from the holder unit; And a guiding portion which is connected to the back side of the holder portion and which is formed in an arc shape whose upper side is opened, to solve the technical problem.

In the present invention, in cutting a heated round bar having a relatively large diameter through a hot forging apparatus, the holder portion and the blade portion are detachably attached to each other by a joining hole and a fixing screw, It has a remarkable effect that only the blade portion can be partially replaced while maintaining the alignment of the holder portion itself coupled to the forging apparatus.

Further, since the holder portion is made of a metal material and the blade portion for cutting the heated round bar is made of a stellite material, it is possible to smoothly cut the round bar cutting face in a heated state even in a high temperature environment in the hot forging device, The holder portion is made of a metal material, and the volume of the blade portion made of the stellite material can be reduced, so that the cost of the cutting tool can be minimized.

In order to minimize the contact between the cut portion of the heated circular rod and the holder portion, the end of the holder portion is subjected to a rounding treatment so that contact with the round bar is minimized when the round bar is lifted down by the cutting operation, So that it is possible to prevent the outer peripheral surface of the round bar from being damaged or damaged in advance by attenuating the impact.

In addition, since the guiding portion whose end is rounded at the end portion is detachably attached to the holder portion, when the guide portion is brought into contact with the guide rod and breakage occurs in the guiding portion, And has a remarkable effect that only the parts can be partially replaced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a rear side perspective view of a cutter for cutting a round bar according to the present invention. FIG.
Fig. 2 is an exploded rear perspective view showing a cutter for cutting a round bar according to the present invention.
3 is a view showing another example in which the holder portion and the blade portion are coupled in the cutter for round bar cutting according to the present invention.
4 is a cross-sectional view showing a guide part in a cutter for cutting a round bar according to the present invention.
5 is a side cross-sectional view showing another example of a guide portion in a cutting tool for cutting a round bar according to the present invention.

Advantages and features of embodiments of the present invention and methods of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The terms and words used in the present specification and claims should not be construed to be limited to ordinary or dictionary meanings defined in consideration of functions in the embodiments of the present invention, It should be construed in the meaning and concept consistent with the technical idea of the present invention based on the principle that the concept of the term can be appropriately defined in order to explain it in the best way.

Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, various equivalents And variations are possible.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other features and advantages of the present invention will become more apparent by describing in detail preferred embodiments thereof with reference to the attached drawings in which: Quot ;, "right ", " right ", " upper "," lower ", " upper ", "lower ","Quot; outer "), and the like, and that the description of such direction is intended to facilitate the description of the arrangements with reference to the accompanying drawings.

Further, the round bar cutting bar of the present invention is coupled to an upper press of a hot forging device for cutting a heated round bar having a relatively large diameter or to a lower fixing means of a hot forging device, The detailed description will be omitted.

It should be noted, however, that cutting of a relatively small diameter round bar can be accomplished by means of a cold forging device, but that the round bar cutting bar according to the present invention is joined to a cut bar for cutting a heated round bar having a large diameter in the hot forging device Leave.

Before describing the present invention with reference to the accompanying drawings, it is not shown what is not necessary to disclose the gist of the present invention, that is, a known structure that a person skilled in the art can easily add by ordinary knowledge, I do not know.

The cutter for cutting a round bar according to the present invention cuts a heated round bar having a relatively large diameter through a hot forging device so that the holder part 100 and the blade part 200 are separated from each other by the coupling part 300 and the fixing screw The blade unit 200 can be detached and attached by the cutting unit 320 so that the aligning of the holder unit 100 itself coupled to the hot forging apparatus can be maintained when the blade unit 200 is worn out due to the cutting operation, It is not necessary to newly set an alignment of the holder 100 at the time of replacement and the time required for the replacement can be shortened and only the worn blade 200 can be replaced, To a cutter for cutting a round bar.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a cutting tool for cutting a round bar according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a rear exploded perspective view showing a cutter for cutting a round bar according to the present invention, and FIG. 3 is a cross-sectional view illustrating a cutter for cutting a round bar according to the present invention. 4 is a cross-sectional view showing a guiding portion in a cutting tool for cutting a round bar according to the present invention, and Fig. 5 is a sectional view of a guiding portion in a round bar cutting mouth according to the present invention. Sectional side view showing another example.

3 and 4, the cutting tool according to the present invention includes a holder 100, a blade 200, a coupling 300, and a guide 400, And the blade unit 200 and the guide unit 400 can be detachably attached to the holder unit 100.

That is, in a state where the aligning of the holder unit 100 fixed to the hot forging apparatus is maintained, only the blade unit 200 and the guide unit 400, which are worn according to the cutting operation of the heated round bar, The purpose is to make sure.

The holder unit 100 is coupled to the hot forging apparatus by being detachably coupled to the blade unit 200 and the guide unit 400 described below.

In addition, the holder portion 100 is joined with the aligning to the hot forging device to cut the heated round bar.

The holder 100 has a generally rectangular parallelepiped shape with one side inclined to the inclined surface 101 and the other side perpendicular to the front or rear surface. 102 are formed.

That is, the angle formed between the front surface and the plane 102 and the angle between the back surface and the plane 102 is a right angle, and the angle formed between the front surface and the sloped surface 101 is the angle between the back surface and the sloped surface 101 And may be formed in a trapezoidal shape larger than the angle formed.

This is because the holder 100 is formed in a shape corresponding to a separate housing for coupling the holder 100 when the holder 100 is coupled to the hot forging apparatus. In the process of coupling the holder 100, And the other side surface can be properly coupled without confusion with the direction in which the holder part 100 is installed by the inclined surfaces 101 and the planes 102 having different shapes.

At this time, the holder unit 100 has a knife edge engaging groove 110 in which the upper end of the front side is inwardly folded and in which the blade unit 200 is inserted, an upper end is opened on the back side, And a guide portion coupling groove 120 in which the guide portion 400 is inserted can be formed.

3, both side upper end portions of the knife edge engaging groove 110 are formed with engaging holes (not shown) along with the blade engaging grooves 110 so that the engaging holes 300 described later can be seated, The upper surface of the coupling part 300 and the upper surface of the guide part 400 inserted into the guide part coupling groove 120 are at the same height Respectively.

In addition, the holder unit 100 is provided with a coupling hole 111 in the form of an inwardly widened shape on both upper and lower sides of the front side, and a through hole 310 (corresponding to the coupling hole 111) The fastening screws 320 are inserted into the through holes 310 and the fastening holes 111 and fastened to each other so that the fastening holes 300 can be firmly coupled to the holder 100.

The blade unit 200 is coupled to the upper end of the front side of the holder unit 100 and is preferably mounted on the blade unit coupling groove 110 and coupled to the holder unit 100 as the coupling unit 300 is coupled thereto And an arc shape whose upper side is opened. In detail, the end is in the form of a semicircular ring, the lower end is in contact with the arc-shaped blade engagement groove 110, and the upper side serves as a blade to cut the heated round bar.

Referring to the accompanying drawings, the blade unit 200 is formed on both sides thereof with a coupling protector 220 protruded upward. The outer side of the coupling protector protector 220 has a step 210 Is formed. 1, a pair of coupling holes 300 are formed on a surface facing each other, that is, an inner peripheral surface of the coupling hole 300 is not exposed to the outside, The coupling member 300 is prevented from being deteriorated due to the contact with the coupling member 300 made of a metal material in the process of entering the holder unit 100 and the binding force of the holder unit 100 and the blade unit 200 is reduced can do.

The coupling members 300 to be described later are respectively seated on both upper ends of the blade coupling grooves 110 of the holder unit 100 and are coupled by the fixing screws 320, The blade part 200 is coupled to the holder part 100 by being coupled to the holder part 100 while the part is in contact with the upper surface of the step 210. [

In order to prevent the knife portion 200 coupled to the holder portion 100 from being detached, a detachment protrusion 112 protruding upward is formed on an upper end surface of the knife edge fitting groove 110, The detachment prevention groove 230 corresponding to the first protrusion 112 may be formed inwardly of the lower end of the blade 200.

1 and 2, the detachment prevention protrusion 112 is fitted in the detent preventing groove 230 to prevent the detachment of the blade 200 from the holder 100 to the front side .

Meanwhile, as shown in FIG. 3, the separation preventing groove 230 and the separation preventing protrusion 112 may have a triangular shape in cross section.

3, the detachment prevention protrusion 112 protrudes from the upper end surface of the knife edge fitting groove 110. The detachment protrusion 112 has an inverted triangle shape in cross section, The groove 230 is formed at the lower end of the blade 200 so that the detachment protrusion 112 is fitted into the detachment prevention groove 230 so that the blade 200 is detached from the holder 100 toward the front side And it is also possible to prevent detachment to the upper side and to further improve the coupling force of the blade unit 200 together with the coupling unit 300. [

At this time, in the process of joining the blade part 200 to the holder part 100, the separation preventing protrusion 230 is formed in the release preventing groove 230 which is open to one side or the other side of the blade part 200 having the lower end surface formed in a circular arc shape The upper end of the blade part 200 is engaged with the holder part 200 by the rotation of the blade part 200 in the state where the end of the blade part 200 is fitted, (Not shown).

Preferably, when the blade unit 200 is rotated so that the separation preventing protrusion 112 is fitted into the separation preventing groove 230, the coupling protector 220 formed on the blade unit 200 is separated from the separation preventing protrusion 112 So that it may not be sandwiched. According to the design conditions, when the length of the separation preventing protrusion 112 is long, the separation preventing groove 230 having an inverted triangle shape is formed not from the end where the step 210 is formed, 200 may be formed to a predetermined length from the middle of the lower side of the blade 200 to the end of the blade 200 where the step 210 is formed from the end of the release preventing groove 230, And the release preventing groove 230 may be formed in the same shape as the release preventing groove 230.

Accordingly, when the release preventing protrusion 112 is fitted into the release preventing groove 230 in which the space of the rectangular shape and the space of the inverted triangle shape are formed, the release preventing groove 230 formed at both ends of the blade portion 200 A part of the separation preventing protrusion 112 is inserted so that the coupling opening protection surface 220 does not interfere with the holder 100 through a wide space and then the blade 200 is rotated to form an inverted triangular space The detachment preventing protrusion 112 of the inverted triangle shape is closely fitted to the detent preventing groove 230 so that the blade 200 can be more firmly coupled to the holder 100. [

According to the design conditions, the blade unit 200 may be made of a stellite material.

Preferably, the blade portion 200 may be made of a metal material, and the blade portion 200 may be made of a stainless steel material.

Thus, it is possible to smoothly cut the cutting surface of the round bar in a heated state even in a high temperature environment of the hot forging apparatus by the blade unit 200 of the stellite material, and the structure except for the blade unit 200 is formed of a metal material, Since the volume of the blade part 200 of the material can be reduced, the cost of the cutting tool can be minimized. In addition, when the guide part 400, which will be described later, is also made of a metal material and the cut round bar is in contact with the guide part 400, It is possible to provide an environment in which breakage does not occur on the outer circumferential surface of the housing.

As shown in the accompanying drawings, the blade part 200 made of a stellite material has a symmetrical shape between a front surface and a back surface. When the blade part 200 is worn on the front surface due to round bar cutting, So that it is possible to use one blade unit 200 made of a stellite material through the position change twice.

The coupling member 300 is coupled to both the upper end of the step 210 and the upper end of the front end of the holder 100 to prevent the blade unit 200 from separating from the holder 100 .

One of the coupling holes 300 is formed in a shape such that the outer peripheral surface of the coupling hole 300 corresponds to the inclined surface 101 of the holder 100, One coupling hole 300 may have a shape in which the outer circumferential surface corresponds to the plane 102 of the holder 100.

The coupling member 300 is in contact with the step 210 of the blade unit 200 and is coupled to the holder unit 100 by the fixing screw 320 so that the blade unit 200 is inserted into the holder unit 100 Ensure that they are firmly connected.

The guide part 400 is coupled to the back side of the holder part 100 and has an arc shape with its upper side opened. Specifically, the guide part 400 is inserted into and engaged with the guide part coupling groove 120 of the holder part 100.

The coupling of the guide part 400 may be formed by forming a separate through-hole in the holder part 100 and the guide part 400, and fastening the fastening screw to the through hole.

The guide part 400 is detachably attached to the holder part 100 so that the broken circular bar comes into contact with the holder part 100 itself and breakage occurs so that the holder part 100 needs to be directly replaced The guide part 400 is prevented from being damaged when the guide part 400 contacts the round bar and the guide part 400 is damaged so that the aligning of the holder part 100 itself is maintained. 400) can be partially replaced.

At this time, as shown in FIG. 4, the guide part 400 may have a round part 410 whose inner diameter gradually decreases toward the holder part 100 side.

The round portion 410 is configured to prevent the outer peripheral surface of the guide portion 400 from being damaged or damaged when the round bar cut by the blade portion 200 of the stellite material is lifted and lowered, .

That is, when the cut round bar contacts the round bar 410, the impact is relieved to prevent the round bar from being damaged.

5, the round portion 410 includes a first round portion 411, a second round portion 412, and a third round portion 413 having different inclination angles Lt; / RTI >

The first round portion 411 is formed at an intermediate portion of the round portion 410 and has a shape inclined from the upper end of the guide portion 400 toward the back side, And an inclination angle of about 75 DEG.

The second round portion 412 is formed on both sides of the first round portion 411 and is formed between the first round portion 411 and a third round portion 413 described later, And the intermediate portion inclination angle may be formed so as to form an inclination angle of about 60 ° with the upper end surface of the guide portion 400.

The third round section 413 is formed on the outer side of the pair of second round sections 412 and is formed between the second round section 412 and the upper end surfaces of both sides of the guide section 400, The inclination angle of the intermediate portion may be formed to form an inclination angle of about 45 ° with the upper end surface of the guide portion 400.

When the cut round bar is in contact with the round portion 410, the impact is relieved by the bent round portion 410 so as to be inclined from the upper end face of the guide portion 400 toward the back side of the holder portion 100, The round bar cut along the inclined surface of the part 410 can be guided to move outside the holder part 100.

At this time, the arc-shaped round portion 410 is formed so that the inclined angle gradually increasing toward the third round portion 413, the second round portion 412, and the first round portion 411 gradually increases, The rounded bar can be guided to be moved to the central portion of the rounded portion 410 so that the accurate position of the cut round bar can be guided to thereby improve the efficiency of the operation.

According to the present invention, in cutting a round bar having a relatively large diameter through a hot forging apparatus, the holder 100 and the blade 200 can be separated from each other through the coupling holes 300 And the fixing screw 320 so that when the blade unit 200 is worn out due to the cutting operation, the aligning of the holder unit 100 itself coupled to the hot forging apparatus is maintained Only the blade portion 200 can be partially replaced.

In addition, since the holder part 100 is made of a metal material and the blade part 200 for cutting the heated round bar is made of a stellite material, even when the hot forging device has a high temperature environment, And the holder part 100 supporting the blade part 200 is made of a metal material so that the volume of the blade part 200 made of a stellite material can be reduced so that the cost of the cutting tool can be minimized .

In order to minimize the contact between the cut portion of the heated circular rod and the holder 100, the end of the holder 100 is subjected to a rounding treatment so that when the round bar is lifted or lowered by the cutting operation, It is possible to prevent the outer circumferential surface of the round bar from being broken or damaged by damping the impact even when contact occurs.

In addition, since the guide part 400 having a rounded end is mounted on the holder part 100, if the guide part 400 is damaged by the contact of the round bar with the guide part 400, Only the guide part 400 can be partially replaced while maintaining the alignment of the guide part 400 itself.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limiting the present invention. It can be seen that branch substitution, modification and modification are possible.

100: holder part 101: inclined surface
102: plane 110: blade edge engaging groove
111: engaging hole 112:
120: guide portion coupling groove 200: blade portion
210: Step 220:
230: release preventing groove 300:
310: Through hole 320: Fixing screw
400: guide part 410: round part
411: first round section 412: second round section
413: third round section

Claims (7)

A holder portion 100;
A blade unit 200 coupled to an upper end of a front side of the holder unit 100 and having a shape of an arc with an opening at an upper side,
A coupling unit 300 coupled to the upper end of the step 210 and the upper end of the front surface of the holder unit 100 to prevent the blade unit 200 from detaching from the holder unit 100; And
And a guide part 400 coupled to the back side of the holder part 100 and having a shape of an arc with an open upper side,
The guide part 400
And a round portion (410) is formed in which an inner diameter of the rear portion side upper portion becomes smaller toward the holder portion (100) side.
The method according to claim 1,
The holder unit 100 includes:
One side surface includes an inclined surface (101) in an inclined shape; And
And the other side is a plane (102) perpendicular to the front side or the back side.
The method according to claim 1,
The holder unit 100 includes:
A cutting edge engaging groove 110 in which a front side upper end is inwardly folded and in which the blade 200 is inserted; And
And a guide part coupling groove (120) having an upper end opened on the back side and being widened inwardly and into which the guide part (400) is fitted.
The method according to claim 1,
The holder unit 100 includes:
A coupling hole 111 is formed in each of upper and lower sides of the front side,
The coupling member 300
A through hole 310 corresponding to the coupling hole 111 is formed,
Wherein the blade unit is coupled to the holder unit by sequentially inserting and fixing the fixing screw into the through hole and the engaging hole.
The method according to claim 1,
The blade portion 200
And a coupling protector (220) extending in an upward direction at an end of the step (210) formed on both sides is formed.
The method according to claim 1,
The blade portion 200
Characterized in that it is made of a stellite material which cuts a heated round bar.
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