EP0154040A2 - Maschine zur spitzenlosen abrasiven Bearbeitung von Rohren, Stangen und dergleichen - Google Patents

Maschine zur spitzenlosen abrasiven Bearbeitung von Rohren, Stangen und dergleichen Download PDF

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Publication number
EP0154040A2
EP0154040A2 EP84116506A EP84116506A EP0154040A2 EP 0154040 A2 EP0154040 A2 EP 0154040A2 EP 84116506 A EP84116506 A EP 84116506A EP 84116506 A EP84116506 A EP 84116506A EP 0154040 A2 EP0154040 A2 EP 0154040A2
Authority
EP
European Patent Office
Prior art keywords
rollers
workpiece
machine
rest
arm
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Withdrawn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
EP84116506A
Other languages
English (en)
French (fr)
Other versions
EP0154040A3 (de
Inventor
Giannino Muffolini
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.)
Sillem 'italiana Lavorazione Legno E Metalli SpA Soc
Original Assignee
Sillem 'italiana Lavorazione Legno E Metalli SpA Soc
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 Sillem 'italiana Lavorazione Legno E Metalli SpA Soc filed Critical Sillem 'italiana Lavorazione Legno E Metalli SpA Soc
Publication of EP0154040A2 publication Critical patent/EP0154040A2/de
Publication of EP0154040A3 publication Critical patent/EP0154040A3/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/36—Single-purpose machines or devices
    • B24B5/38—Single-purpose machines or devices for externally grinding travelling elongated stock, e.g. wire

Definitions

  • This invention relates to a machine for the centreless abrasive machining of tubes, bars and similar workpieces, or of cylindrical or conical bodies, of any material. More particularly, the invention relates to machines known as lapping machines, polishing machines and grinding machines which operate on the workpiece with one or more abrasive tools such as abrasive belts, grinding wheels, cleaning wheels and the like.
  • the workpiece rests at its machining zone on a vertically and horizontally adjustable blade or the like, and is disposed between a motorised roller or wheel and the abrasive tool.
  • the motorised roller can also be adjusted horizontally and vertically, and is also inclinable in order to give the workpiece its necessary feed movement.
  • the adjustments necessary for adaptation to the workpiece dimensions are generally mutually independent, and the operating times required therefore substantially affect the machine productivity.
  • the situation worsens if the workpiece to be machined has a substantial length, for example some metres, and must therefore be supported upstream and downstream of the machining point by discharge and loading devices.
  • such devices comprise a'series of pairs of idle rest rollers for the workpieces, and each pair can be adjusted independently of the others in terms of inclination and verticality.
  • the object of the present invention is to provide a machine for the centrelest abrasive machining of workpieces, comprising at least one abrasive tool (grinding wheel, disc, belt or the like) and means on which the workpiece can rest, the machine enabling the adjustments required on the basis of the workpiece dimensions to be made in a substantially shorter time than in the case of known machines.
  • abrasive tool grinding wheel, disc, belt or the like
  • a machine characterised essentially by comprising at least one support structure supporting at least one workpiece rest unit formed from idle rollers or wheels and able to be variously inclined to the workpiece feed direction, and at least one unit which, besides acting as a rest by way of rollers or wheels, rotates and feeds the workpiece in consequence of the operation of at least one of its rollers, and said latter unit can be associated with at least one presser roller which acts on the workpiece by way of a control device operated by pressurised fluid and can be inclined in the reverse direction to the inclination of the rest rollers by way of a linkage with a control means (for example a handwheel) to which the rest rollers of the units are also linked.
  • a control means for example a handwheel
  • the machine comprises at least one operating unit of the abrasive tool type (grinding wheel, disc, belt or the like) which is mounted on its own autonomous structure by means of an arm which is rotatable in a vertical plane and is controlled by a pressurised fluid cylinder-piston unit, so that the tool can be applied to the workpiece substantially from above, thus automatically adapting to the dimensions of the workpiece being machined.
  • the abrasive tool type grinding wheel, disc, belt or the like
  • each pair of rollers which can be either merely rest rollers or rest and feed rollers for the workpiece
  • the machine of the given example comprises three identical, substantially cage-like modular base elements constructed of metal sections, and indicated by A, B and C respectively. It also comprises an operating unit G formed from a column 1, a rotatable arm 2 hinged at an intermediate point 3 to the column 1, and a double acting cylinder-piston unit 5 controlled by pressurised fluid and interposed between the arm 2 and a projecting part 4 of the column 1 so as to cause the arm to rotate, ie to approach or withdraw from the workpiece which is here assumed to be a bar of circular cross-section, indicated by 6.
  • the abrasive tool is represented by an endless belt 7 passing over two rollers 8 and 9, the latter being driven by a motor (possibly associated.with a reduction gdar, not shown) mounted on the arm or on the column.
  • a motor possibly associated.with a reduction gdar, not shown mounted on the arm or on the column.
  • a fraction of the periphery of the roller 9 projects from the arm 2 so that the belt can attack and thus machine the workpiece 6.
  • a grinding wheel, polishing disc or the like can be used instead of the abrasive belt, and these would be mounted in the arm in known manner instead of the roller 9.
  • the operating unit ' G is mounted laterally to the intermediate base element B, which is connected at its ends to the base elements A and C by any known screw means.
  • the base elements A and C (together with the workpiece rest and movement means which will be described in detail hereinafter) represent the loading and discharge sections of the machine respectively, whereas the intermediate base element B (also together with the workpiece rest and movement means which will be described in detail hereinafter) represents the operating section.
  • the aforesaid rest and movement means for the workpiece being machined are basically of two types and serve for all the sections A, B and C. These means are mounted on cross-members connected by screw means to the longitudinal members 11 and 10 of the base elements at predetermined distances apart, and are basically of two types.
  • the first and more complicated type is formed from a pair of coplanar rubber-coated rollers 13, 14 which are disposed close together to define an upper intermediate gap which receives the workpiece being machined if this has a diameter greater than a given value.
  • the workpiece obviously rests on the periphery of said rollers.
  • the rollers in question are rotatably supported in a projecting manner by the vertical side 16 of a L-shaped member 17, of which the horizontal side 18 is connected lowerly to a vertical hollow shaft 19 rotatably mounted in a hub fixed to the cross-member 12.
  • the roller 14 is motorised by a chain 100 from the roller 13, which is driven by a geared motor unit'21.
  • an angle arm 22 carrying two coplanar, idle rollers 24, 25 disposed close togetber which, when the arm is in the position of Figure 3, rest on the rollers 14, 13 respectively.
  • the pair of rollers 24, 25 serves for the smaller diameter workpieces 6, which are placed in the upper gap defined by them, and which would not be able to be adequately supported on the rollers 13, 14 if placed in the gap 15 between these latter.
  • the rollers 24, 25 are moved into their inoperative position. In this position, the arm 22 can rest by way of the roller 24 against a stop 26 present on the vertical side 16 of the member 17.
  • the hollow shaft 19 At its lower end, projecting from the hub 20, the hollow shaft 19 comprises a radial arm 27 which serves to adjust the inclination of the rollers 13, 14 and rollers 24, 25 to the longitudinal axis of the workpiece 6, in order to give this latter its necessary feed movement.
  • a vertical shaft 30 which projects at its ends.
  • said shaft is provided with a radial arm 31 by means of which it is possible to adjust the angular position of said shaft and of the members connected to it, and which will now be described.
  • the shaft 30 comprises a radial arm 32 which supports a double acting cylinder-piston unit 33 operated by pressurised fluid.
  • the rod 34 of the cylinder-piston unit 33 also carries a radial arm 35, the free end of which supports on its lower side an idle presser roller 36.
  • said arm is for example made rigid with a prong 36A guided in a longitudinal groove (not shown) provided on the outside of the cylinder of the cylinder-piston unit 33.
  • the presser roller 36 serves to press the workpiece 6 (see Figure 3) against the rollers 24, 25 or, when these are inactive, against the rollers 13, 14.
  • the workpiece rest and movement unit heretofore described serves for supporting the workpiece, and for rotating it about its axis and providing it with an axial feed movement, this latter by virtue of the inclination of the unit to the workpiece axis.
  • the presser roller 36 which assumes a reverse inclination to that of the rollers 13, 14 and 24, 25 (see Figure 4 in particular), serves to ensure adherence of the workpiece 6 to these latter so that they can transmit the necessary rotary-translatory movement against the action which the abrasive tool (belt 6) exerts on the workpiece.
  • These units are indicated by D in the figures.
  • the second type of workpiece rest means is represented by at least one unit, representing a simplification of the unit D.
  • This unit, indicated by E in the figures, is obtained from the unit D by removing the members 21, 30, 31, 32, 33, 34, 35, 36A, 36 from this latter.
  • the unit D is reduced to the rest rollers 13, 14, 24, 25, all of which are idle and can be variously inclined by means of their arms 27.
  • a single control member is provided, represented in this case by a handwheel 40 rotatably supported by the base element B, together with a linkage comprising connection bars between the units.
  • the handwheel 40 is rigid with a pinion 41.
  • the pinion is interposed between two racks 42, 43 which are fixed to bars 44, 45 of considerable length.
  • the lower bar 45 interconnects all the arms 31 of the units D, whereas the bar 44 interconnects all the arms 27 both of the units D and of the units E.
  • the arms 27, 31 support the relative bars 44, 45, to which they are connected by pivots 48 which allow a relative angular movement between bars and arms.
  • the two racks 42, 43 and thus the relative bars 44, 45 move horizontally in opposite -directions.
  • the control pinion 41 by the effect of the rotational connection with the relative arms, racks and bars, they move transversely (see arrow F of Figure 6) to the control pinion 41.
  • the rest rollers 13, 14 and 24, 25 and the presser'rollers 36 become inclined to the longitudinal axis of the workpiece 6, namely the former (13, 14 and 24, 25) becoming inclined to the latter (36).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
EP84116506A 1984-03-06 1984-12-30 Maschine zur spitzenlosen abrasiven Bearbeitung von Rohren, Stangen und dergleichen Withdrawn EP0154040A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8419912A IT1213147B (it) 1984-03-06 1984-03-06 Macchina per la lavorazione abrasiva senza centro di tubi, barre e simili.
IT1991284 1984-03-06

Publications (2)

Publication Number Publication Date
EP0154040A2 true EP0154040A2 (de) 1985-09-11
EP0154040A3 EP0154040A3 (de) 1987-04-01

Family

ID=11162274

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84116506A Withdrawn EP0154040A3 (de) 1984-03-06 1984-12-30 Maschine zur spitzenlosen abrasiven Bearbeitung von Rohren, Stangen und dergleichen

Country Status (2)

Country Link
EP (1) EP0154040A3 (de)
IT (1) IT1213147B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1350600A1 (de) * 2002-04-02 2003-10-08 Olimpia 80 SRL Vorrichtung und Verfahren zur Oberflächen-Endbearbeitung von Rohren mittels Lamellenbürsten
CN101987425A (zh) * 2009-07-31 2011-03-23 付朋 钢管外圆修磨机
CN111037378A (zh) * 2019-11-28 2020-04-21 安徽永茂泰汽车零部件有限公司 一种汽车铸造件加工用表面处理设备

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH216024A (de) * 1939-03-04 1941-07-31 Malcus Holmquist Ab Vorrichtung an spitzenlosen Schleifmaschinen zum Verschieben des Werkstückes zur Schleifmaschine hin oder von derselben weg.
US2754640A (en) * 1954-09-10 1956-07-17 Production Machine Company Apparatus for rotating and axially feeding work
US3474914A (en) * 1965-07-26 1969-10-28 Krasny & Ass Carl Bar handling device
US3655067A (en) * 1970-04-20 1972-04-11 Automation Development Corp Bar feeder and escapement device
GB1364944A (en) * 1972-04-13 1974-08-29 British Steel Corp Handling equipment for bar processing machinery
US3836028A (en) * 1972-07-31 1974-09-17 Valley Bank And Trust Co Feed apparatus
US4107880A (en) * 1976-02-02 1978-08-22 Randall John P Floating buffing wheel assembly

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH216024A (de) * 1939-03-04 1941-07-31 Malcus Holmquist Ab Vorrichtung an spitzenlosen Schleifmaschinen zum Verschieben des Werkstückes zur Schleifmaschine hin oder von derselben weg.
US2754640A (en) * 1954-09-10 1956-07-17 Production Machine Company Apparatus for rotating and axially feeding work
US3474914A (en) * 1965-07-26 1969-10-28 Krasny & Ass Carl Bar handling device
US3655067A (en) * 1970-04-20 1972-04-11 Automation Development Corp Bar feeder and escapement device
GB1364944A (en) * 1972-04-13 1974-08-29 British Steel Corp Handling equipment for bar processing machinery
US3836028A (en) * 1972-07-31 1974-09-17 Valley Bank And Trust Co Feed apparatus
US4107880A (en) * 1976-02-02 1978-08-22 Randall John P Floating buffing wheel assembly

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1350600A1 (de) * 2002-04-02 2003-10-08 Olimpia 80 SRL Vorrichtung und Verfahren zur Oberflächen-Endbearbeitung von Rohren mittels Lamellenbürsten
CN101987425A (zh) * 2009-07-31 2011-03-23 付朋 钢管外圆修磨机
CN111037378A (zh) * 2019-11-28 2020-04-21 安徽永茂泰汽车零部件有限公司 一种汽车铸造件加工用表面处理设备

Also Published As

Publication number Publication date
IT8419912A0 (it) 1984-03-06
IT1213147B (it) 1989-12-14
EP0154040A3 (de) 1987-04-01

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Inventor name: MUFFOLINI, GIANNINO