US3781960A - Method of manufacturing a tube and tin radiator - Google Patents

Method of manufacturing a tube and tin radiator Download PDF

Info

Publication number
US3781960A
US3781960A US00240589A US3781960DA US3781960A US 3781960 A US3781960 A US 3781960A US 00240589 A US00240589 A US 00240589A US 3781960D A US3781960D A US 3781960DA US 3781960 A US3781960 A US 3781960A
Authority
US
United States
Prior art keywords
strips
pipes
apertures
radiator
sheet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00240589A
Other languages
English (en)
Inventor
Der Hoek W Van
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
US Philips Corp
Original Assignee
US Philips Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US3781960A publication Critical patent/US3781960A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/053—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
    • F28D1/0535—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight the conduits having a non-circular cross-section
    • F28D1/05366—Assemblies of conduits connected to common headers, e.g. core type radiators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D2001/0253—Particular components
    • F28D2001/026—Cores
    • F28D2001/0266—Particular core assemblies, e.g. having different orientations or having different geometric features
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49377—Tube with heat transfer means
    • Y10T29/49378—Finned tube
    • Y10T29/4938—Common fin traverses plurality of tubes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49789—Obtaining plural product pieces from unitary workpiece
    • Y10T29/49794—Dividing on common outline
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49789—Obtaining plural product pieces from unitary workpiece
    • Y10T29/49796—Coacting pieces

Definitions

  • ABSTRACT A method of manufacturing a radiator from a strip of sheet material having a maximum thickness of 1 mm; by means of a die, rows of uniform apertures are punched, after which the strip is cut longitudinally through the centers of the apertures, so that strips having a maximum width of 25 mm are formed. The strips are then spaced apart a maximum distance of 3 mm with the apertures in alignment, and cooling water pipes are inserted in each row of apertures and soldered.
  • the invention relates to a method of manufacturing a radiator which comprises a number of cooling water pipes which communicate at one end with an inlet and at the other end with an outlet for cooling water.
  • the radiator furthermore comprises a number of Strips which extend at right angles to the cooling water pipes and are connected to said pipes in a heat-conducting relationship.
  • Radiators of the type to which the present invention relates are used for example in the cooling system of combustion engines to give off thermal energy to the atmosphere.
  • the radiator is usually accommodated under the bonnet of the relevant vehicle.
  • the available space and in particular the available front surface is restricted.
  • engines having higher powers and also for external combustion engines in which two cases a large amount of thermal energy has to be dissipated via the radiator, it is of great importance to have a radiator construction available which has a large cooling capacity per unit of front surface area.
  • a'radiator which consists of a number of elements which enclose an angle with each other so that a zig-zag structure is formed for the front and rear surface.
  • This radiator is furthermore characterized by the fact that the thickness of each element is at most 25 mm and furthermore the hydraulic diameter of the air ducts in the elements is smaller than 2 mm. In this manner a radiator is obtained having an extremely large cooling capacity per unit of front surface area.
  • the object of the present invention to provide a method with which the above-described radiator can be series-produced in a simple and hence cheap manner.
  • the method according to the invention is characterized in that a strip of sheet material having a thickness of at most 1 mm is provided, by means of a die, with a number of rows of uniform recesses. Afterward the strip is cut in its longitudinal direction by means of a cutting tool across the centre of the said recesses, so that a number of strips is obtained having a width of at most 25 mm, the said recesses opening into a side edge of said strips.
  • the strips at mutually equal distances of at most 3 mm are directed on their sides in parallel, with the recesses in alignment, and are conveyed along a pipe inserting mechanism in which a cooling water pipe is inserted into each row of recesses.
  • the formed assembly of strips and pipes is then soldered together and the strips are subsequently interrupted at a given length to obtain a radiator element.
  • the transport of the strips past the pipe inserting mechanism can be carried out by moving the pipes present already in the recesses so that a good positioning of the recesses relative to each other in the juxtaposed strips is always ensured.
  • the starting material in a further embodiment is sheet material having a thickness of at most 4 mm, which sheet is passed between two rollers one of which comprises a number of parallel recesses extending according to a generatrix and having a depth of at least 3 mm and the other of which is smooth so that a strip of sheet material is obtained which is flat on one side and comprises ribs of the other side.
  • starting material is sheet material comprising a layer of joining material and/or the strips, after punching the recesses, are provided with such a layer, while the pipes are also covered with a layer of joining material, the joining being carried out by passing a warm current of gas through the assembly of pipes and strips.
  • the insertion of the cooling water pipes is carried out by making the pipes to length and then flattening said pipes, at least over the length covered by the strips, to a thickness which corresponds substantially to the width of the recesses in the strips. Next these pipes are supplied to one or two drivable pipe drums in which the pipes are retained to in the proximity of the position where the juxtaposed strips substantially contact the pipe drum and the pipes engage in the relevant recesses and the drums take along the strips via the pipes. In this manner a good synchronization of the movement of the drums and of the strips is automatically ensured.
  • the strips are supported, at least at the area where they substantially contact the pipe drum, on their side remote from the relevant drum by a slightly curved surface so that the recesses facing said drum are also slightly bent open. This also has the great advantage that, after the insertion into the recesses, the pipes are clamped which benefits the heat transfer.
  • the recesses are provided in the strips in such manner that they enclose a small angle of at most 20 with the normal on the side of the relevant strips.
  • Another embodiment of the method according to the invention is characterized in that, during punching the recesses, recesses of a different shape are punched at regular distances which, after soldering, form fracture lines in the formed assembly along which the radiator elements can be separated, after which 'a number of said elements are arranged at an angle with each other and are joined together.
  • the invention furthermore relates to a radiator obtained according to the above-described method.
  • This radiator combines a surprisingly large cooling capacity with comparatively low costs of manufacture and material. The invention will be described in greater detail with reference to the drawing.
  • FIGS. 1, la, 1b, and 16 show in fragmentary views in perspective, initial stages of manufacture according to this invention.
  • FIGS. 2 and 3 show in fragmentary views in perspective subsequent stages in said manufacture.
  • FIG. 4 shows a front elevation view of a radiator formed by this invention.
  • FIG. shows a top plan view of the radiator of FIG. 4.
  • FIGS. 1 to 5 show diagrammatically by way of example the manufacture of a radiator.
  • Reference numeral 1 in FIG. 1 denotes a strip of sheet material having a thickness of 0.l mm. This strip is guided through a punching device 2 which is shown diagrammatically and comprises a block of dies containing a large number of dies which punch rows of recesses 3 in the sheet, and one row of dies which punch recesses 4 of a different shape.
  • the strip of material is then guided through a cutting machine 5 having a number of knives 6 which cut the sheet into a number of strips 7 having a width of 16 mm.
  • the knives 6 cut exactly across the centre of the recesses 3 and 4 so that said recesses open into a side edge of each of the strips 7.
  • the recesses 3 extend slightly obliquely relative to the relevant side wall of the strip. This is not necessary; in certain circumstances the recesses 3 may have a shape as is shown in FIG. la in which they extend at right angles to the line along which the knives 6 cut the sheet. An advantage of this latter is the much simpler form of the dies.
  • the formed strips 7 are wound on a reel 8 and that in such manner that the recesses 3 of all the strips face the same side with their open sides, which means that every other strip has to be turned. After a certain length of strip has been wound on the reel 8, the strip is broken or cut or clipped and the full reel is ready for further processing.
  • a number of full reels 8 are placed on uncoilers 9 (FIG. 2) in such manner that in each reel the recesses 3 are directed upwards with their open sides.
  • the strips 7 are then guided from the reels through one or more orienting mechanisms 10 which are a type of comb-like guides having teeth which are approximately 0.3 mm thick and placed approximately 0.1 mm apart. The strips 7 are guided between the teeth.
  • one strip and one intermediate distance together cover a width of 0.4 mm. So for a radiator having a height of 40 cm, already 1,000 strips are necessary. So for practical dimensions of radiators, more reels will be necessary than the 6 which are shown in the drawing. Considering some 40 strips each 16 mm wide per reel, even then reels are necessary in that case. This means that the utmost care should be paid to the orientation and support of the running strips and therefore a plurality of orienting mechanisms 10 will be used in practice.
  • the strips 7 are transferred to a conveyor belt 11 (FIG. 3) the surface of which is provided with a large number of moustache hairs having a thickness of approximately 0.3 mm and a transverse distance of 0.1 mm so that they take over the function of the orienting mechanism 10 and accurately hold the strips apart.
  • the flattened pipes 14 run to the pipe drum 12 which comprises on its circumference recesses 18 into which, each time when they pass below the duct 17, a pipe is fed.
  • the pipes laid in the recesses 18 are maintained there by the shield 20 which surrounds a part of the drum with a small amount of play.
  • the shield 20 terminates just above the strips 7 so that when the pipes 14 have arrived there, they slide out of the recesses 18 in the drum into the recesses 3 of the strips 7.
  • the strips 7 will also bend slightly, as a result of which the recesses are bent open a bit so that the pipes 14 can easily be inserted.
  • the strips 7 are further moved with the drum 12 because said drum comprises at either end catches 13 which engage the pipes present in the recesses as a toothed wheel so that a good synchronization of the movements of drum and strips is automatically ensured.
  • the relevant pipe gradually leaves the recess 18 and fully engages in the relevant recess 3 in which, as a result of the recoil of the strips the pipes 7 are clamped in the recesses 3 so that a good thermal contact is ensured.
  • the strips 7 are now fixed relative to each other so that no guides are necessary any more. In this manner, all the recesses 3 are provided with a pipe, after which the assembly of strips and pipes, which had all been tin-plated before the operation started, are guided through a heating device 21.
  • the width of the strips is not chosen to be larger than 25 mm, while in combination therewith with a minimum hydraulic diameter of the ducts through which the air flows, the ratio b/dh is smaller than 15 (b width of the strips and d,, hydraulic diameter), a radiator is obtained having a cooling capacity which is considerably larger than that of the known radiators.
  • the radiator in question furthermore has the advantage of light-weight and the construction is readily suitable for mechanisation.
  • a method of manufacturing a radiator which comprises a plurality of cooling water pipes having inlets and outlets and are positioned generally parallel to a first axis, and a plurality of strips of sheet material of maximum thickness 1 mm extending between said pipes and generally at a right angle to said axis, and
  • a method according to claim 1 comprising the further steps of forming on said strips and pipes a layer of solder before the pipes are inserted into said apertures; heating a gas to temperature above the melting point of said solder, and permanently joining said pipes and strips by flowing said heated gas into contact with said solder layers, where the pipes and strips intersect.
  • a method according to claim 1 comprising the further steps of partially flattening said pipes along their lengths between their ends from circular to oral crosssection.
  • a method according to claim 1 comprising the further steps of forming fracture perforations at specified locations intermediate said apertures, and fracturing a subsequently manufactured radiator element into separate parts along a line defined by a plurality of said perforations.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
US00240589A 1972-02-17 1972-04-03 Method of manufacturing a tube and tin radiator Expired - Lifetime US3781960A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7202071A NL7202071A (el) 1972-02-17 1972-02-17

Publications (1)

Publication Number Publication Date
US3781960A true US3781960A (en) 1974-01-01

Family

ID=19815389

Family Applications (1)

Application Number Title Priority Date Filing Date
US00240589A Expired - Lifetime US3781960A (en) 1972-02-17 1972-04-03 Method of manufacturing a tube and tin radiator

Country Status (9)

Country Link
US (1) US3781960A (el)
JP (1) JPS5120745B2 (el)
CA (1) CA992299A (el)
DE (1) DE2304754A1 (el)
FR (1) FR2172355B1 (el)
GB (1) GB1417457A (el)
IT (1) IT979108B (el)
NL (1) NL7202071A (el)
SE (1) SE381831B (el)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050092473A1 (en) * 2003-10-30 2005-05-05 Smithey David W. Flexible tube arrangement-heat exchanger design
EP1962040A1 (en) 2007-02-23 2008-08-27 Delphi Technologies, Inc. Bend relief spacer
US20090241340A1 (en) * 2006-07-14 2009-10-01 Yun Kyung Myung Method of manufacturing heat sink for memory module
CN101603786B (zh) * 2008-06-13 2013-07-17 德尔菲技术公司 具有弯曲缓冲间隔件的热交换器组件及其制造方法
CN105258532A (zh) * 2013-08-28 2016-01-20 杭州三花微通道换热器有限公司 换热器

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10281221B2 (en) 2012-07-18 2019-05-07 Fab Tek Logic, Llc Removable heatsink fin assembly
US9605909B2 (en) 2012-07-18 2017-03-28 Fab Tek Logic, Llc Removable radiator fin assembly

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2092170A (en) * 1935-12-31 1937-09-07 Richard W Kritzer Method of fabricating a finned heat exchanger
US2512540A (en) * 1945-02-19 1950-06-20 Rue Gas Dev Ltd De Heat exchanger
US2913806A (en) * 1954-11-22 1959-11-24 Richard W Kritzer Fabrication of heat transfer units
CA709555A (en) * 1965-05-18 W. Kritzer Richard Automatic apparatus for loading an assembly nest with fin strips in the production of heat exchange units
US3407874A (en) * 1966-05-19 1968-10-29 John R. Gier Jr. Fin tube assemblage for heat exchangers

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2154104A (en) * 1936-09-16 1939-04-11 Modine Mfg Co Apparatus for baking radiator cores
US2298895A (en) * 1942-02-28 1942-10-13 Gen Electric Method of making heat exchange units
US2811204A (en) * 1953-10-01 1957-10-29 Richard W Kritzer Apparatus for making heat transfer coils
US3191418A (en) * 1961-01-06 1965-06-29 Arthur B Modine Method and apparatus forming serpentine fins
FR2031928A5 (en) * 1969-02-13 1970-11-20 Otani Akemasa Helical tubular steel pile

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA709555A (en) * 1965-05-18 W. Kritzer Richard Automatic apparatus for loading an assembly nest with fin strips in the production of heat exchange units
US2092170A (en) * 1935-12-31 1937-09-07 Richard W Kritzer Method of fabricating a finned heat exchanger
US2512540A (en) * 1945-02-19 1950-06-20 Rue Gas Dev Ltd De Heat exchanger
US2913806A (en) * 1954-11-22 1959-11-24 Richard W Kritzer Fabrication of heat transfer units
US3407874A (en) * 1966-05-19 1968-10-29 John R. Gier Jr. Fin tube assemblage for heat exchangers

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050092473A1 (en) * 2003-10-30 2005-05-05 Smithey David W. Flexible tube arrangement-heat exchanger design
US7004241B2 (en) * 2003-10-30 2006-02-28 Brazeway, Inc. Flexible tube arrangement-heat exchanger design
US20090241340A1 (en) * 2006-07-14 2009-10-01 Yun Kyung Myung Method of manufacturing heat sink for memory module
EP1962040A1 (en) 2007-02-23 2008-08-27 Delphi Technologies, Inc. Bend relief spacer
US20080202733A1 (en) * 2007-02-23 2008-08-28 Samuelson David E Bend relief spacer
US7900689B2 (en) 2007-02-23 2011-03-08 Delphi Technologies, Inc. Bend relief spacer
CN101603786B (zh) * 2008-06-13 2013-07-17 德尔菲技术公司 具有弯曲缓冲间隔件的热交换器组件及其制造方法
CN105258532A (zh) * 2013-08-28 2016-01-20 杭州三花微通道换热器有限公司 换热器
CN105258532B (zh) * 2013-08-28 2017-08-29 杭州三花微通道换热器有限公司 换热器

Also Published As

Publication number Publication date
FR2172355A1 (el) 1973-09-28
SE381831B (sv) 1975-12-22
DE2304754A1 (de) 1973-08-23
FR2172355B1 (el) 1976-06-11
JPS5120745B2 (el) 1976-06-28
IT979108B (it) 1974-09-30
JPS4890043A (el) 1973-11-24
GB1417457A (en) 1975-12-10
NL7202071A (el) 1973-08-21
CA992299A (en) 1976-07-06

Similar Documents

Publication Publication Date Title
US2757628A (en) Method of making a multiple passage heat exchanger tube
EP0646231B1 (en) Heat exchange tubes
US6968891B2 (en) Louver fin and corrugation cutter for forming louver fin
JP5517082B2 (ja) 波板製造装置、波板製造方法および熱交換器
US3781960A (en) Method of manufacturing a tube and tin radiator
GB2252069A (en) A method for manufacturing a corrugated fin and shaping roll apparatus therefor
US4494288A (en) Method of production of cross-fin type heat exchanger
US4881311A (en) Heat exchanger assembly with integral fin unit
JP2672463B2 (ja) 熱交換器用定尺偏平チューブの製造方法
US5937935A (en) Heat exchanger and method of making the same
US4275785A (en) Heat exchange tubing blade assembly
JPH07178486A (ja) 熱交換器のヘッダタンク製造方法及びその装置
US20050167088A1 (en) Fin array for heat transfer assemblies and method of making same
EP0108707B1 (en) An apparatus for forming fins for heat exchangers
US3309763A (en) Method for making a heat exchanger
US20160236262A1 (en) Offset Fin Manufacturing Method And Offset Fin Manufacturing Apparatus
US6212764B1 (en) Link bending machine
JPH04270892A (ja) 熱交換器
US4107394A (en) Corrugated sheet metal heat transfer member
US4175309A (en) Conveyorized fin accumulator
US3718960A (en) Machine for manufacturing helical fin tubes
JPS613996A (ja) 熱交換器用フインおよびその製造方法
GB2051337A (en) A tubular heat exchanger and a method of manufacturing the same
EP0143136A1 (en) Apparatus for forming corrugated fins for heat exchangers
KR200289596Y1 (ko) 절삭부의 일측이 커팅된 핀커터