EP0249862A2 - Verfahren und Vorrichtung zum Herstellen von gestanzten Rohren - Google Patents

Verfahren und Vorrichtung zum Herstellen von gestanzten Rohren Download PDF

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Publication number
EP0249862A2
EP0249862A2 EP87108346A EP87108346A EP0249862A2 EP 0249862 A2 EP0249862 A2 EP 0249862A2 EP 87108346 A EP87108346 A EP 87108346A EP 87108346 A EP87108346 A EP 87108346A EP 0249862 A2 EP0249862 A2 EP 0249862A2
Authority
EP
European Patent Office
Prior art keywords
mandrel
punch
tube
guide
apertures
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.)
Withdrawn
Application number
EP87108346A
Other languages
English (en)
French (fr)
Other versions
EP0249862A3 (de
Inventor
Edward Duce
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.)
Stockrail Services Ltd
Original Assignee
Stockrail Services Ltd
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
Priority claimed from GB868614808A external-priority patent/GB8614808D0/en
Priority claimed from GB868626891A external-priority patent/GB8626891D0/en
Application filed by Stockrail Services Ltd filed Critical Stockrail Services Ltd
Publication of EP0249862A2 publication Critical patent/EP0249862A2/de
Publication of EP0249862A3 publication Critical patent/EP0249862A3/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/28—Perforating, i.e. punching holes in tubes or other hollow bodies

Definitions

  • This invention relates to a method of and apparatus for producing punched tube, being typically tube which is used for posts or uprights in a racking system comprising the posts or uprights and cross bars and cross connectors.
  • Such racking systems may be used for example as shelving support structures, hanging structures for articles and goods and general warehousing.
  • the posts of such racking systems are required to have apertures therein for the receipt of cross bars, fastening devices, clips, clamps and so on for the connection and mounting of the cross connecting members, and it is usual to provide such posts by initially punching the apertures in flat strip material, typically flat strip steel, and then by forming the steel into angled or channel form.
  • This invention relates to a method of and apparatus for punching apertures in the walls of tubes, to produce for example the posts of racking systems, but as will be appreciated as the description proceeds, the invention can apply to the punching of holes in tubes which are required for any suitable purpose.
  • the tube be of square section, and that apertures be punched in all faces of the tube, at least over a portion of the length. Punching of apertures in all faces provides the tube with maximum flexibility as to location for connection with a cross bar insofar as it can be arranged that the cross bars can be connected to or linked to any face of the tube. Specifically, in the manufacture of the tube according to the invention, the apertures on opposite faces are aligned so as to permit the cross bars to pass directly through the tube at right angles thereto, but the respective apertures on their respective faces are staggered throughout the length of the tube.
  • a mandrel is located inside the tube and is operatively arranged in relation to a punch head, said punch head having a die which punches the apertures in the tube by passing through the tube and into a recess in the mandrel, and wherein the tube is fed progressively over the mandrel so that the punch head can be operated cyclically in order to punch a line of apertures in the tube.
  • the punch head has a guide and the mandrel has a guide aperture into which the guide locates prior to the engagement of the die with the tube in order to ensure that prior to the punching operation the die and the recess in the mandrel will be aligned for the punching operation.
  • the guide and guide aperture may be of such configuration that the guide will pass through a previously formed aperture in the tube, other than during the first punching operation, to form the first aperture of the line of apertures.
  • the mandrel also preferably is of square section, and may comprise a long guide bar having one end fixed.
  • the tube to be punched is fed over the mandrel in one direction and over the end remote from the fixed end, and when the tube is in position the punching operation commences and after each punching operation the tube is fed step by step off the mandrel in a direction opposite to that in which it was placed on the mandrel.
  • the tube may be fed off the mandrel by automatically or manually operated means, and in one arrangement a pusher tube is slidable on the mandrel and abuts one end of the tube being punched, said pusher tube being connected to a reach of drive chain which is an endless member trained over spaced sprockets or gear wheels.
  • a manually operated gear transmission assembly may be drivingly coupled to one of the sprockets or gear wheels so that by manually turning the said transmission assembly, the pusher tube can be moved on the mandrel and can push the tube being punched progressively off the mandrel.
  • Any conventional press may be used for the punching operation but of course it will require to be of sufficient rating to perform the punching operation.
  • the apparatus described can be used for punching apertures in each side of a square section tube, because as each side is completed, the tube is simply removed from the apparatus and turned through 90°, 180° or 270° to punch any of the other three faces.
  • the gauges define two different datum positions so that the apertures in the respective opposite pairs of walls of the tube wil be in the same positions lengthwise of the tube, and therefore one guide only is required for each pair of faces.
  • the apertures will be pitched at the same pitch on each face of the tube, and that pitching will also be equal to the pitching between the punch die and guide on the punch head.
  • the mandrel may be surrounded in the region of that portion which has the recesses for receiving the punch die and punch guide, with said guide box, the guide box carrying rollers for engaging the outer surface of the tube as it passes over the mandrel, in order to ensure as frictionless a movement over the mandrel as possible.
  • the punch head is adapted to move vertically, the mandrel being disposed horizontally, and being supported for example on roller decking which again facilitates the frictionless movement of the tube over the mandrel.
  • Tube 10 has four faces 10A, 10B, 10C and 10D which are provided with punched apertures 12 in face 10A, 14 (not visible in Fig. 1) in face 10B, 16 in face 10C and 18 in face 10D.
  • the apertures 12 in face 10B are aligned with aperture 16 in face 10C
  • apertures 14 in face 10B are aligned with apertures 18 in face 10D.
  • the apertures 10, 14, 16 and 18 may extend for the whole length of tube 10, or only for a portion of such length as required.
  • the apertures 12, 14, 16 and 18 are evenly pitched by a pitch length P along the length of the respective faces, and pairs of apertures 14 and 18 are staggered lengthwise of the tube 10 relative to the pairs of apertures 12 and 16.
  • the present invention is concerned in the embodiment to be described with the punching of the apertures 12, 14, 16 and 18 in the tube 10 and for this purpose there is provided a machine indicated generally by the numeral 20 in Fig. 2.
  • the machine 20 comprises a power punch 22 having a punch head 24 which is movable as indicated by the arrow 26 in a vertically up and down fashion, upon the opeation of a foot pedal 28 accessible to an operator who sits at the front of punch 22 to operate the machine.
  • the machine 20 also includes a framework 30 comprising upright legs 32, 34 and 36, at the bases of which are support feet 38.
  • the tops of the uprights 32, 34 and 36 are connected by a top decking 40 which is provided with rollers 42 spaced there-along so that the rollers 42 lie with their axes horizontal and parallel.
  • the decking 40 also supports a gear transmission 44 comprising a hand wheel 46 having a handle 48 by which the hand wheel 46 can be rotated about its axis.
  • a first gear pinion 50 Co-­axial with and fast with hand wheel 46 is a first gear pinion 50 which drivingly engages a gear wheel 52 rotatable about an axis parallel to the axis of hand wheel 46.
  • Gear wheel 52 is co-axial with and drivingly connected to a first sprocket 54 around which an endless chain 56 is trained.
  • first sprocket 54 around which an endless chain 56 is trained.
  • the chain 56 passes over a second sprocket 58 at the rear end of the machine and supported on mounting blocks 60 at said rear end.
  • the gear transmission 44 is towards the front end of the machine, and it will be understood from Fig. 2 that the length of the machine section between upright 34 and upright 32 is substantial compared to that between upright 34 and upright 36 so as to accommodate long lengths of post 10.
  • the decking 40 and in particular the rollers 42 thereof support a long square section mandrel 62 which is of such a size as to fit neatly into the interior of a tube such as a tube 10 placed thereon.
  • the mandrel 62 passes through a drive sleeve 64 which is secured to the lower reach of the chain 56 by a fixing means 66 which may comprise a nut and bolt arrangement, as shown more clearly in Fig. 3.
  • the drive sleeve 64 is slidable on the mandrel 62 and it will be appreciaed therefore that when the hand wheel 46 is turned using the handle 48, the chain 56 will be driven in either direction depending upon the direction of rotation of the hand wheel 46, and the sleeve 64 will be moved over the length of the mandrel 62 to an extent limited only by the spacing between the sprockets 54 and 58.
  • the mandrel 62 at the rear end is mounted for limited pivotal movement on a pivot bolt 68 carried by a mounting block 70 at the rear of the machine. This is the only location where the mandrel 62 is connected to the machine and it is otherwise free so that a long length of tube 10 can be pushed over the mandrel in order to be punched as indicated in Fig. 1.
  • the front end of the mandrel 62 is tapered as shown at 72 and as shown in Fig. 3 can receive a tube 10 to be pushed thereover.
  • the tube 10 is pushed over the end 72 until it engages the drive sleeve 64 and placement of the tube 10 over the mandrel 62 continues until the drive sleeve 64 is in its most rearward position, for example as shown in Fig. 2 and 3.
  • the machine will be designed so that when the drive sleeve 64 is in its rearmost position, the tube 10 will in fact be clear of a front portion of the mandrel located under the punch head 24. This front portion of the mandrel 62 is shown in greater detail in Fig.
  • FIG. 4 which figure also shows that surrounding the front portion of the mandrel 62 is the guide box 74 made up of a pair of spaced guide blocks 76 and 78 between which the mandrel 62 passes with clearance as shown.
  • the blocks 76 and 78 are secured together by cross bars 80 and 82 screwed to the blocks 74 and 78 by means of screws 82A.
  • Fig. 4 shows that the top face of the mandrel 62 is provided with apertures 84 and 86 spaced by the pitching P illustrated in Fig. 1, and to the underside, the mandrel is recessed as shown at 88 and the apertures 86 and 84 lead to the recess 88.
  • the block 78 is provided with a pair of gauge pins 88 and 90 which can slide relative to the block 78 as indicated by arrows 92 and 94 so that the inner ends of such pins 88 and 90 can be caused to abut the side of the mandrel 62 or can be removed therefrom.
  • the punch head 24 is provided with a guide pin 92 and a punch pin 94 which are of the cross section which is the same as the apertures 84 and 86, and also the apertures 12, 14, 16 and 18 in the tube 10, and the guide pin 92 and the punch pin 94 are spaced by the said pitching P.
  • the guide pin 92 is in alignment with aperture 86 in the mandrel, whilst the punch pin 94 is in alignment with the aperture 84.
  • the punch pin 94 has a flat punching face 96 whilst the guide pin 94 is chamfered as indicated at 98 in order to provide a "lead-in" into the aperture 86.
  • the punch pin 92 projects further from the punch head 24 than does the punch pin 94.
  • a tube 10 to be punched is fed onto the mandrel as indicated by arrow 100 in Fig. 3, the gauge pins 88 and 90 being retracted to allow this to take place and this feeding on continues until the tube 10 abuts the drive sleeve 64, and that sleeve is moved to its rearmost position in the machine.
  • the length of tube 10 is selected so that when it is in this position on the mandrel, the forward end of the tube is clear of the guide box 74.
  • the operator now decides on the position of the apertures to be formed in the tube i.e.
  • the pin 94 punches a blank out of the appropriate face of the tube as indicated in Fig. 5, the blank being indicated by reference 102.
  • the blank falls into the recess 88 and eventually rests upon the inner surface of the opposite side of the tube 10.
  • the operator now removes the appropriate pin 88 or 90 so that the tube 10 can be advanced by rotation of the hand tool 46, and the tube is advanced until the previously formed aperture is in alignment with the pin 98 when the press is again stroked.
  • the pin 92 passes through the previously formed aperture before once more entering the aperture 86, and therefore not only is the punch pin 94 and the aperture 84 brought into exact register once more, but the correct pitching between the previously formed aperture and the aperture to be formed by this punching stroke is accurately established.
  • This process is repeated until the required number of apertures have been formed into tube face.
  • the tube is retracted from the mandrel in a direction opposite to direction 100, the accumulated blanks 102 inside the tube are discharged, and then the tube is rotated through 90°, 180°, or 270° and is replaced on the mandrel for the punching of the appropriate face.
  • the pins 90 and 88 are used accordingly.
  • the method and apparatus of the embodiment described permits the rapid and accurate punching of apertures such as 12, 14, 16 and 18 in a square tube 10.
  • the method can be used for the punching of apertures in the tubes of different cross section but appropriate mandrels would have to be provided.
  • the modification of the punch and mandrel end shown in Fig. 6 comprises the provision of a second guide pin and a second aperture in the mandrel so that the first and second guide pins will engage the first and second guide apertures in the mandrel to ensure even better registerability with the punch pin in relation to the punch aperture.
  • the second guide pin and guide aperture achieve this improved alignment.
  • the shape of aperture which is punched can be referred to as a "chapel window" aperture in that it is elongated and at one end has an edge lying at right angles to the length direction, and at the other end is semi-circular.
  • the punch pin and guide pin preferably are of similar shape, and are spaced by a certain pitch equal to the required pitching between a line of the apertures to be formed on the tube so that the first guide pin passes through a previously formed aperture in the tube in entering the first guide aperture whilst a subsequent aperture is being punched in the tube by the punch pin.
  • the second guide pin is circular and engages in a circular aperture in the mandrel, the second guide pin being pitched in relation to the first guide pin so that it will pass through previously formed apertures in the tube as the tube is advanced over the mandrel for the punching of a line of apertures therein.
  • the punch and guide pins are arranged in alignment with the punch pin at one end of the line and the circular guide pin at the other end of the line.
  • the punch head 24 is shown as being provided with punch pin 94 and a guide pin 92 which are of chapel window shape as illustrated in Fig. 1.
  • the mandrel 62 is provided with the recess 88 and a punch aperture 84 and a guide aperture 86 all as described herein.
  • the mandrel 62 is extended as is the head 24, and a second guide pin 93 is provided which is of circular configuration and is for engagement in a second guide aperture 85 in the mandrel, the aperture 85 also being of circular configuration so as neatly to receive pin 93.
  • the lower end of the pin 93 is chamfered as shown at 93A and the top edge of the aperture 85 is also chamfered as shown at 85A to achieve smooth entry of the pin 93 into the aperture 85.
  • the head 24 is reciprocated as indicated by arrow 26 so as to punch apertures in a tube which fits over the mandrel, as described herein.
  • the guide pins 93 and 92 enter the apertures 85 and 86 before the punch 94 punches the tube and enters the punch aperture 84.
  • the pins 94, 92 and 93 are spaced so that during each stroke, except the first and second strokes, the pin 94 will punch a fresh aperture, but the pins 92 and 93 will pass through previously formed apertures in the tube.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Punching Or Piercing (AREA)
EP87108346A 1986-06-18 1987-06-10 Verfahren und Vorrichtung zum Herstellen von gestanzten Rohren Withdrawn EP0249862A3 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB8614808 1986-06-18
GB868614808A GB8614808D0 (en) 1986-06-18 1986-06-18 Producing punched tube
GB868626891A GB8626891D0 (en) 1986-11-11 1986-11-11 Punched tube
GB8626891 1986-11-11

Publications (2)

Publication Number Publication Date
EP0249862A2 true EP0249862A2 (de) 1987-12-23
EP0249862A3 EP0249862A3 (de) 1989-11-15

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP87108346A Withdrawn EP0249862A3 (de) 1986-06-18 1987-06-10 Verfahren und Vorrichtung zum Herstellen von gestanzten Rohren

Country Status (1)

Country Link
EP (1) EP0249862A3 (de)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2081247A2 (es) * 1993-06-10 1996-02-16 Valle Alfredo Resa Procedimiento para la fabricacion de puntales telescopicos.
GB2301300A (en) * 1995-05-25 1996-12-04 Anwar Investments Limited A process for producing a display system
CN1067923C (zh) * 1996-05-22 2001-07-04 南昌航空工业学院 一种矩形类管材侧壁切口或切断的冲压工艺
SG99908A1 (en) * 2001-06-26 2003-11-27 Singapore Technologies Electro Method and apparatus for creating spaced openings in hollow devices
CN104858667A (zh) * 2015-06-12 2015-08-26 广东建星建筑设备有限公司 爬架走道板自动化生产线
CN108687222A (zh) * 2018-04-26 2018-10-23 湖州剑力金属制品有限公司 自动管件冲孔设备
CN109382437A (zh) * 2017-08-08 2019-02-26 深圳市飞托克实业有限公司 一种自动冲孔机
CN110280651A (zh) * 2019-06-19 2019-09-27 张家港市诺恩机械有限公司 一种多角度冲孔机
CN112872171A (zh) * 2021-01-11 2021-06-01 合肥正特机械有限公司 一种用于管件加工的冲孔模具
CN116550856A (zh) * 2023-06-25 2023-08-08 云南大力神建筑材料科技有限公司 一种圆管冲孔设备
CN116971578A (zh) * 2023-09-23 2023-10-31 佛山市广亚铝模科技有限公司 一种异形铝型材及铝型材间断式开孔工艺
CN116871397B (zh) * 2023-09-05 2023-11-24 潍坊晟华新能源科技有限公司 一种光伏支架加工用定长冲孔装置

Family Cites Families (12)

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Publication number Priority date Publication date Assignee Title
US1764129A (en) * 1925-09-28 1930-06-17 Mcevoy Wireless Well Strainer Apparatus for perforating casings
FR775413A (fr) * 1934-07-06 1934-12-28 E De Smidts & G Allain Appareil pour poinçonner les tubes
FR1064483A (fr) * 1952-10-04 1954-05-13 Cherifienne De Sondages Inject Dispositif pour lanternages de tubes
US3376725A (en) * 1964-11-04 1968-04-09 Walker Mfg Co Production machine
FR1469116A (fr) * 1965-11-26 1967-02-10 Procédé et dispositif pour le poinçonnage des corps creux d'une section quelconque
US3738209A (en) * 1971-10-04 1973-06-12 R Davis Device for punching holes in metal tubes
US3815399A (en) * 1972-10-10 1974-06-11 N Foulks Pipe perforating machine
US4052880A (en) * 1976-08-10 1977-10-11 Noah E. Foulks Pipe perforating machine
DE2829681C2 (de) * 1978-07-06 1983-10-20 Rohrtechnik Osthoff Gmbh & Co Kg, 8803 Rothenburg Vorrichtung zum kontinuierlichen Stanzen von Löchern in stabförmige Hohlkörper
GB2075403B (en) * 1980-05-07 1984-07-11 Burner Systems Int Punching apparatus
FR2497699A1 (fr) * 1981-01-15 1982-07-16 Mulard Michel Perfectionnements aux machines a poinconner de part en part des profiles comportant au moins deux parois a percer
DE3243625C2 (de) * 1982-11-25 1986-10-23 Metallwarenfabrik König GmbH, 7560 Gaggenau Stanzvorrichtung zum Herstellen von Lochreihen auf dem Umfang eines Rohres

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2081247A2 (es) * 1993-06-10 1996-02-16 Valle Alfredo Resa Procedimiento para la fabricacion de puntales telescopicos.
GB2301300A (en) * 1995-05-25 1996-12-04 Anwar Investments Limited A process for producing a display system
GB2301300B (en) * 1995-05-25 1998-06-17 Anwar Investments Limited A Process for producing a display system
CN1067923C (zh) * 1996-05-22 2001-07-04 南昌航空工业学院 一种矩形类管材侧壁切口或切断的冲压工艺
SG99908A1 (en) * 2001-06-26 2003-11-27 Singapore Technologies Electro Method and apparatus for creating spaced openings in hollow devices
CN104858667B (zh) * 2015-06-12 2017-05-31 广东运达科技股份有限公司 爬架走道板自动化生产线
CN104858667A (zh) * 2015-06-12 2015-08-26 广东建星建筑设备有限公司 爬架走道板自动化生产线
CN109382437A (zh) * 2017-08-08 2019-02-26 深圳市飞托克实业有限公司 一种自动冲孔机
CN108687222A (zh) * 2018-04-26 2018-10-23 湖州剑力金属制品有限公司 自动管件冲孔设备
CN110280651A (zh) * 2019-06-19 2019-09-27 张家港市诺恩机械有限公司 一种多角度冲孔机
CN112872171A (zh) * 2021-01-11 2021-06-01 合肥正特机械有限公司 一种用于管件加工的冲孔模具
CN116550856A (zh) * 2023-06-25 2023-08-08 云南大力神建筑材料科技有限公司 一种圆管冲孔设备
CN116871397B (zh) * 2023-09-05 2023-11-24 潍坊晟华新能源科技有限公司 一种光伏支架加工用定长冲孔装置
CN116971578A (zh) * 2023-09-23 2023-10-31 佛山市广亚铝模科技有限公司 一种异形铝型材及铝型材间断式开孔工艺
CN116971578B (zh) * 2023-09-23 2024-01-16 佛山市广亚铝模科技有限公司 一种异形铝型材及铝型材间断式开孔工艺

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Publication number Publication date
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