KR101526372B1 - Method of manufacturing the master link using water jet - Google Patents

Method of manufacturing the master link using water jet Download PDF

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Publication number
KR101526372B1
KR101526372B1 KR1020140134235A KR20140134235A KR101526372B1 KR 101526372 B1 KR101526372 B1 KR 101526372B1 KR 1020140134235 A KR1020140134235 A KR 1020140134235A KR 20140134235 A KR20140134235 A KR 20140134235A KR 101526372 B1 KR101526372 B1 KR 101526372B1
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KR
South Korea
Prior art keywords
link portion
split link
split
cutting
link
Prior art date
Application number
KR1020140134235A
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Korean (ko)
Inventor
조행래
Original Assignee
코리아크롤러트랙 주식회사
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Priority to KR1020140134235A priority Critical patent/KR101526372B1/en
Priority to PCT/KR2014/009477 priority patent/WO2016056688A1/en
Application granted granted Critical
Publication of KR101526372B1 publication Critical patent/KR101526372B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F3/00—Severing by means other than cutting; Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D55/00—Endless track vehicles
    • B62D55/08—Endless track units; Parts thereof
    • B62D55/18—Tracks
    • B62D55/20—Tracks of articulated type, e.g. chains
    • B62D55/205—Connections between track links

Abstract

A master link manufacturing method according to the present invention includes: a first step of forging a base material having a predetermined size to manufacture a forged block; A second step of subjecting the forged block to heat treatment and molding; And a third step of waterjet cutting the forged block so as to be divided into a first split link portion having a first tooth profile on one side and a second split link portion having a second tooth profile to be engaged with the first tooth profile, . By using the master link manufacturing method according to the present invention, it is possible to increase the master link productivity by dividing one forged block into a pair of split link portions by using the water jet cutting process, and the first split link portion and the second split link portion It is advantageous that a pair of divided link portions can be more accurately formed even if a portion lost during the water jet cutting process is generated.

Figure R1020140134235

Description

METHOD OF MANUFACTURING THE MASTER LINK USING WATER JET BACKGROUND OF THE INVENTION [0001]

The present invention relates to a master link manufacturing method for producing a pair of divided link portions by using a water jet, and more particularly, to a method for manufacturing a master link by a pair of And to a method of manufacturing a master link in which split link portions are configured to be precisely matched.

An endlesstrack applied to crawler-type vehicles such as bulldozers, excavators and the like has a plurality of jointly operably linked track chain links, each track chain link having a track shoe track shoe are separately attached. And the ends of the track chain link are detachably connected by a master link.

The master link of such an endless track is constituted by two split link parts which are assembled to each other so as to connect the ends of the track chain links with each other, and each split link part is provided with individual assembling parts, And the assembling parts are assembled through fasteners or the like after they are fitted to each other.

Hereinafter, a conventional master link manufacturing method will be described in detail with reference to the accompanying drawings.

Fig. 1 is a side view of a forged block, and Fig. 2 is a side view showing a shape in which the forged block is divided into a first split link portion and a second split link portion by wire cutting.

When the master link is to be manufactured, first the forging block 10 shown in FIG. 1 is manufactured through material heating and hot forging, and then the forging block 10 is subjected to heat treatment, primary both sides cutting, Boring, fastening part drilling, and exercise wear high-frequency processing. When the forging block 10 is completed, the first split link portion 11 and the second split link portion 15 are cut by wire cutting along the cutting line C across the forged block And make them. The first split link portion 11 and the second split link portion 15 should have a first tooth 12 and a second tooth 16 that are mutually engaged with each other. It is advantageous that the machining of the first tooth profile 12 and the second tooth profile 16 is completed through one wire cutting cutting process.

However, in the case of using the wire cutting cutting method, it takes a long time to cut the forged block, so that there is a disadvantage that there is a limit to the productivity improvement.

KR 10-1144859 B1

Disclosure of the Invention The present invention has been proposed in order to solve the above problems. It is an object of the present invention to improve the productivity by using a water jet when dividing one forged block into a pair of split link parts, And a method of manufacturing a master link in which a pair of split link portions can be more accurately matched.

According to another aspect of the present invention, there is provided a method of manufacturing a master link, comprising: a first step of forging a base material having a predetermined size to produce a forged block; A second step of subjecting the forged block to heat treatment and molding; And a third step of waterjet cutting the forged block so as to be divided into a first split link portion having a first tooth profile on one side and a second split link portion having a second tooth profile to be engaged with the first tooth profile, .

Wherein the forging block is configured such that the first split link portion and the second split link portion are connected to each other with a cut region interposed therebetween so that the first tooth profile and the second tooth profile are mutually engaged after the cutting region is removed, When the split link portion and the second split link portion are connected, the outer surface of the first split link portion and the outer surface of the second split link portion form one surface.

Wherein the fork block is arranged such that its longitudinal direction is obliquely inclined from an upper end to a lower end of the forged block, and a step is formed between the first split link portion and the second split link portion on the upper surface and the lower surface of the forged block, Height is set equal to the maximum distance in the vertical direction of the cutting area.

And a fourth step of finishing the first tooth profile of the first split link portion and the second tooth profile of the second split link portion.

The fourth step is performed through a cutting process using a water jet.

The fourth step is performed through a cutting process using a separate cutting machine.

By using the master link manufacturing method according to the present invention, it is possible to increase the master link productivity by dividing one forged block into a pair of split link portions by using the water jet cutting process, and the first split link portion and the second split link portion It is advantageous that a pair of divided link portions can be more accurately formed even if a portion lost during the water jet cutting process is generated.

1 is a side view of a forging block.
2 is a side view showing a shape in which the forging block is divided into a first split link portion and a second split link portion by wire cutting.
3 is a flowchart of a master link manufacturing method according to the present invention.
4 and 5 illustrate a process of fabricating the first split link portion and the second split link portion using the master link manufacturing method according to the present invention.
6 to 8 illustrate a process of fabricating the first split link portion and the second split link portion using the second embodiment of the master link manufacturing method according to the present invention.

Hereinafter, embodiments of a master link manufacturing method according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 3 is a flowchart of a master link manufacturing method according to the present invention, and FIGS. 4 and 5 illustrate a process of fabricating the first split link portion and the second split link portion using the master link manufacturing method according to the present invention.

Generally, when the master link including the first split link portion 110 and the second split link portion 120 is manufactured, it is necessary to separately manufacture the first split link portion 110 and the second split link portion 120 The first split link portion 110 and the second split link portion 120 are simultaneously manufactured by cutting one forging block 100. Conventionally, the forged block 100 is cut using a wire cutting method There has been a problem that it takes much time to cut the monotonous block 100, that is, there is a limit to productivity improvement.

In order to solve the above problems, the master link manufacturing method according to the present invention cuts the forged block 100 using a water jet cutting method instead of the wire cutting method, And the two-piece link unit 120 can be manufactured. That is, a master link manufacturing method according to the present invention includes a first step (S10) of cutting a base material in the shape of a round bar to prepare a base material having a predetermined size and then forging the base material to manufacture the forging block 100 A second step S20 of heating and strengthening the forging block 100 to perform a forming process such as boring and the like; cutting the forged block 100 by a water jet to form first split link portion 110 and second And a third step (S30) of dividing the divided link section 120 into two. At this time, a first tooth 112 is formed on one side of the first split link 110 (more specifically, on the side facing the second split link 120), and the first split tooth 112 is formed on the second split link. When the first split link and the second split link are connected such that the first tooth 112 and the second tooth 122 engage with each other, The split link and the second split link are not spaced away from each other.

As described above, the master link manufacturing method according to the present invention is configured to cut the forging block 100 using a water jet. As compared with the case of using wire cutting, the time required for cutting the forging block 100, 100 to the first split link portion 110 and the second split link portion 120 can be remarkably shortened. For example, it takes a minimum of 2 to 3 hours to cut the forged block 100 by the wire cutting method. However, it usually takes 30 minutes or less to cut the forged block 100 by the water jet cutting method, Master link productivity is improved by about 5 times. At this time, the first step S10 of manufacturing the forging block 100 and the second step S20 of performing the heat treatment and the molding are substantially the same in the conventional master link manufacturing method, It is omitted.

The method of manufacturing a master link according to the present invention includes cutting a forging block 100 to form a first split link portion 110 having a first tooth 112 and a second split link portion 110 having a second tooth 122 formed thereon 120). In general, when cutting is performed using a water jet, there is a problem that the cut surface is not smooth, that is, the roughness of the cut surface is low. If the roughness of the portion where the first toothed portion 112 and the second toothed portion 122 are pressed together is low, the first toothed portion 112 and the second toothed portion 122 are not in perfect surface contact, The first split tooth portion 110 and the second split tooth portion 120 are not stably stuck together. In the method of manufacturing a master link according to the present invention, the first tooth profile 112 and the second tooth profile 122 are finishing, And a fourth step of improving the quality of the image.

At this time, when finishing the first tooth profile 112 and the second tooth profile 122, the water jet cutting process may be used once more, or a separate cutting machine such as a milling machine or a hopping machine may be used. If the cutting surface is finished by using a separate cutting machine, the roughness of the cutting surface can be improved to a very high level, but there is a disadvantage in that a large amount of cost is required to install the cutting machine. In addition, It is possible to reduce the roughness of the cut surface slightly compared to the case of using a cutting machine, but it is advantageous in that the finishing work is simplified without requiring additional installation cost. Therefore, it is desirable for the user to appropriately select the finishing method according to various conditions such as the characteristics and usage of the master link.

6 to 8 illustrate a process of fabricating the first split link portion 110 and the second split link portion 120 using the second embodiment of the master link manufacturing method according to the present invention.

Since the wire cutting uses a very thin wire to cut the forging block 100, that is, the cutting line of the forging block 100 forms one line, the amount of loss of the forging block 100 in the cutting process 2, when the first divided link portion 110 and the second divided link portion 120, which are independently divided, are connected to each other, the first toothed portion 112 and the second toothed portion 120, (122) can be precisely matched.

However, when the forging block 100 is cut using the water jet, as shown in FIG. 4, the loss portion L, which is formed by cutting the forged block 100, is generated, When the two-piece link portions 120 are connected to each other, the first tooth 112 and the second tooth 122 do not make surface contact, but are in line contact or point contact, as shown in FIG. When the first toothed portion 112 and the second toothed portion 122 are not in surface contact with each other, the first split link portion 110 and the second split link portion 120 are connected to the track chain link and pulled There is a problem that a flow may be generated between the first split link portion 110 and the second split link portion 120. [ When the loss portion L is lost during the cutting process of the forging block 100, when the first split link portion 110 and the second split link portion 120 are connected to each other, A step of a certain height (a) is formed between the upper surface of the second split link portion 120 and the upper surface of the second split link portion 120, There is a possibility that the connection between the first split link unit 120 and the second split link unit 120 is released.

In order to solve such a problem, the forging block 100 includes a separate cutting area 130 between the first split link part 110 and the second split link part 120, The first divided link portion 110 and the second divided link portion 120 are connected to each other with the cutting region 130 interposed therebetween.

If the cutting region 130 to be lost in the water jet cutting is provided in advance between the first split link portion 110 and the second split link portion 120, the first split link portion 110, which is divided by water jet cutting, The second split link portion 120 and the second split link portion 120 can be manufactured such that the first teeth 112 and the second teeth 122 are accurately shaped as shown in FIG. 8, when the first split link portion 110 and the second split link portion 120 are connected to each other, the first teeth 112 and the second teeth 122 are spaced apart from each other by a large distance So that the first split link portion 110 and the second split link portion 120 can be stably connected to each other.

5, when the forged block 100 is cut without providing the cutting region 130 between the first split link portion 110 and the second split link portion 120, When the cutting region 130 is provided between the first split link portion 110 and the second split link portion 120, The outer surface of the first split link portion 110 and the outer surface of the second split link portion 120 form one surface when the first split link portion 110 and the second split link portion 120 are connected to each other It is preferable that the first split link portion 110 is formed higher than the second split link portion 120. [

6, when the longitudinal direction of the cutting area 130 is arranged obliquely from the upper end to the lower end of the forging block 100 as shown in this embodiment, It is preferable that the first split link portion 110 and the second split link portion 120 have a shape that is higher than the second split link portion 120 on the upper surface and the lower surface. When the first split link portion 110 and the second split link portion 120 are engaged with each other, the height b of the stepped portion is set to be equal to the maximum distance in the vertical direction of the cut region 130, The outer surface of the first split link 110 and the outer surface of the second split link 120 form a single surface.

At this time, the cutting region 130 provided between the first split link portion 110 and the second split link portion 120 is not formed to have a constant width, but the first tooth 112 and the second tooth 122 The cut region 130 may not be completely lost through one water jet cutting because the narrow portion and the wide portion may be mixed. Therefore, in the master link manufacturing method according to the present invention, when the first split link part 110 and the second split link part 120 are divided through water jet cutting, not all of the cutting area 130 is lost, The first toothed portion 112 and the second toothed portion 122 can be perfectly formed by removing the remaining cutting region 130 through a separate finishing process.

The finishing process for removing the remaining cutting area 130 may be performed through an additional water jet cutting process as in the finishing step S40 shown in Fig. 3, or a separate cutting machine utilization such as a milling machine or a hopper machine Lt; / RTI >

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the scope of the present invention is not limited to the disclosed exemplary embodiments. It will also be appreciated that many modifications and variations will be apparent to those skilled in the art without departing from the scope of the present invention.

100: forging block 110: first split link section
112: first tooth profile 120: second split link portion
122: second tooth 130: cutting area

Claims (6)

delete delete delete delete A first step of forging a base material of a predetermined size to produce a forged block;
A second step of subjecting the forged block to heat treatment and molding;
A third step of waterjet cutting the forged block so as to be divided into a first split link portion having a first tooth profile on one side and a second split link portion having a second tooth profile to be engaged with the first tooth profile; And
A fourth step of finishing the first tooth profile of the first split link portion and the second tooth profile of the second split link portion through a cutting process using a water jet;
, ≪ / RTI &
The forging block manufactured in the first step is configured such that the first split link portion and the second split link portion are connected to each other with a cutting region interposed therebetween, and after the cutting region is removed, the first tooth profile and the second tooth profile The outer surface of the first split link portion and the outer surface of the second split link portion form one surface when the first split link portion and the second split link portion are connected to each other,
Wherein the fork block is arranged such that its longitudinal direction is inclined obliquely from an upper end to a lower end of the forged block, and a step is formed between the first split link portion and the second split link portion on the upper surface and the lower surface of the forged block, Height of the cutting region is set equal to the maximum distance in the vertical direction of the cutting region. delete
KR1020140134235A 2014-10-06 2014-10-06 Method of manufacturing the master link using water jet KR101526372B1 (en)

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PCT/KR2014/009477 WO2016056688A1 (en) 2014-10-06 2014-10-08 Method of manufacturing masterlink using waterjet

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10676143B2 (en) 2017-09-28 2020-06-09 Caterpillar Inc. Keyhole master track link

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10723396B2 (en) 2017-12-19 2020-07-28 Caterpillar Inc. Master track link with unitary rail

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101144859B1 (en) * 2011-12-16 2012-05-14 코리아크롤러트랙 주식회사 Method of manufacturing the master link

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KR100781757B1 (en) * 2007-02-08 2007-12-04 대창단조 주식회사 Processing method of master link
KR101022835B1 (en) * 2010-11-16 2011-03-17 문경식 Processing method of master link
KR20130119652A (en) * 2012-04-24 2013-11-01 케이.유.티 (주) Manufacturing method of master link for track link assembly

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101144859B1 (en) * 2011-12-16 2012-05-14 코리아크롤러트랙 주식회사 Method of manufacturing the master link

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10676143B2 (en) 2017-09-28 2020-06-09 Caterpillar Inc. Keyhole master track link

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