US3044331A - Device for drawing or rolling, especially for the production of frustoconically shaped bodies and the like - Google Patents

Device for drawing or rolling, especially for the production of frustoconically shaped bodies and the like Download PDF

Info

Publication number
US3044331A
US3044331A US785074A US78507459A US3044331A US 3044331 A US3044331 A US 3044331A US 785074 A US785074 A US 785074A US 78507459 A US78507459 A US 78507459A US 3044331 A US3044331 A US 3044331A
Authority
US
United States
Prior art keywords
rolling
rotating elements
bore
axes
elements
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
US785074A
Inventor
Groppini Diego
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.)
Dalmine SpA
Original Assignee
Dalmine SpA
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 Dalmine SpA filed Critical Dalmine SpA
Priority to US785074A priority Critical patent/US3044331A/en
Application granted granted Critical
Publication of US3044331A publication Critical patent/US3044331A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/16—Making tubes with varying diameter in longitudinal direction
    • B21C37/18—Making tubes with varying diameter in longitudinal direction conical tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
    • B21B17/14—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling without mandrel, e.g. stretch-reducing mills

Definitions

  • the device which is the subject of the present patent application, obviates the above mentioned inconvenience and defect, and is substantially characterized by the fact that it comprises at least two rotating elements with their axes on the same plane, and shaped in such a manner as to obtain the drawn orrolled cross section required; these elements work in conjunction with one another at at least one part of the drawing or rolling cross section by means of teeth or similar devices, and which, by their intermeshing with one another, can produce a continuous shape profile even at a distance from the plane of the rotation axes.
  • FIGURE 1 Shows an elevation front view of a device with three rotating elements in the position of the maximum drawing diameter opening.
  • FIGURE 2 Shows a cross section through line 2-2 of FIGURE 1. 1
  • FIGURE 3 Shows an analogous representation of the device as according to FIGURE 1, but at the minimum drawing diameter opening position.
  • FIGURE 4 Shows a cross section through line 44 of FIGURE 3.
  • FIGURE 5 Shows an elevation front view of a three element device with a constant opening.
  • FIGURE 6 Shows a cross section through line 66 of FIGURE 5.
  • A, B, and C indicate the three rotating elements, which in the illustration, have their rotating axes on the same plane, and are arranged as per the sides of an equilateral triangle.
  • the three elements are therefore equal to each other.
  • These three elements are so shaped as to produce a circular drawing bore having its center in the center of the triangle composed of the' rotating axes.
  • the diameter of the circular cross section is variable in a continuous manner, as can be clearly seen from FIGURE 2, in which the element B is shown in section across the middle plane perpendicular to the axes, and that is tosay in correspondence with the bottom of the groove which provides the drawing or rolling bore.
  • FIGURES 2 and 4 the tubular shaped metal being operated upon is shown as D, whilst E and F indicate respectively the outflow outline at the bottom of the groove zone, and at the toothed zone.
  • the rotating elements A, B, and C comprise bevel pinions, and are suited for motion transmission between two axes situated on the same plane, and at an angle of 60 to each other (angle contained in the apex of an equilateral triangle).
  • each element A, B, and C is formed by the body of the teeth and the bevel pinions; teeth, which theoretically, for a drawing bore diameter almost equal to twice the maximum height of same, can cooperate completely with the concave shape of each element A, B, and C.
  • the drawing bore is at least partially formed by the tooth part of each element (i.e. rotating element).
  • the meshing of the teeth creates the continuous inflow (that is to say that the bore outline is substantially continuous), even in planes parallel to the plane containing the rotating axes, and at a distance from said plane. In such a manner, and with the device described, fair sized diameter reductions, and perfectly circular sections can be obtained without any inconvenience.
  • elements B, and C are freely held by pivot journals 2, and 3, and receive transmission from the bevel pinions of the motor element A.
  • the drawing or rolling bore can also be constant as depicted in FIGURES 5 and 6, and in which the parts corresponding to those shown in FIGURES l to 4 are indicated with the same references but provided with primes.
  • drawing or rolling bore can be of any shape and need not be limited to the circular shape as shown.
  • the number of the rotating elements can also be two, or more than three.
  • these can be with rotary parallel axes, with upright or helical teeth, or also with converging axes, and bevel teeth.
  • these can have the axes arranged as a regular polygon, or even irregular, as long as the conditions of correct reciprocal collaboration of the teeth parts is maintained.
  • a rolling mill for rolling tubular bodies comprising: at least three rotating elements, each of which have toothed gearing on the end portions thereof and integral therewith, said rotating elements having their axes in the same plane and being disposed relative to each other so that said rotating elements provide a desired cross section of the article to be rolled, said toothed gearing on each of said rotating elements engaging said toothed gearing on said rotating elements adjacent thereto, said toothed gearing also engaging the article to be rolled prior to andat the gauge whereby the article to be rolled is given its desired configuration along its entire periphery prior to and at the gauge of said mill.
  • a rolling mill for rolling tubular bodies comprising:. at least three rotating elements, each of which have toothed gearing on .the end portions thereof and integral that said rotating elements define a bore having its center intersecting the center of the area defined by the axes of said rotating elements and provide adesired cross sec-' tiori of'the article to be rolled, said toothed gearing on each of said rotating elements engaging said toothed gear- 'ing on said rotating elements adjacent thereto, said toothed gearing also engaging the article to, be rolled prior to and at the drawing bore whereby the article to be rolled is given its desired configuration along its entire periphery prior to 'andat the drawing bore of themill.
  • a rolling mill for rolling tubular bodies, the combination of, at least three rotating elements having their axes in a common plane and. afiording die continuity in sections parallel to and prior to the plane containing the axes of the rotating elements, said rotating elements being disposed relative to each other so that said rotating elements define a bore having a minimum cross section corresponding in outline with the desired cross section of the article to be rolled, veach or said rotating elements having toothed'gearing on an end portion thereof and'in- 'tegral therewith, the-toothed gearing on each of said rotating elements engaging'the toothed gearing on said rotating elements adjacent thereto, the toothed gearing on said rotating elements also engagingthe article to be rolled prior to and at the minimum cross section of the bore whereby the article to be rolled is given a desired configuration along its entire periphery prior to and at the minimum cross section of the bore of the mill.
  • a rolling mill for rolling tubular bodies comprising: at least three rotating and cooperating elements, each said element having toothed gearing integral therewith on its end portion, said rotating elements being so configured and relatively so positioned as to each other to provide a drawing bore for imparting a desired cross section to the article to be rolled, the toothed gearing integral with said rotating elements being engageable with each other and being also engageable with the article to be rolled, the rotation axes of'said rotating elements forming an equilateral triangle 'With the center line ofthe drawing bore intersecting the center of the area defined by the equilateral triangle.

Description

- July 17, 1962 D, GR WN. 3,044,331
DEVICE FOR DRAWING OR R ESPECIALLY FOR THE PRODUCTION OF NICALLY LIKE OLLING FRUSTO-CO SHAPED BODIES AND THE 3 Sheets-Sheet 1 Filed Jan. 5, 1959 mm% Q G E m y 7, 1962 D. GROPPINI 31 DEVICE FOR DRAWING OR ROLLING, ESPECIALLY FOR THE PRODUCTION OF FRUSTO-CONICALLY APED BODIES AND THE LIKE 3,044,331 OR THE 7 July 17, 1962 DEVICE FIG.5
United States Patent. Ofiice i 3,044,331 Patented July 17,1962
DEVICE FOR DRAWING OR ROLLING, ESPE- CIALLY FOR THE PRDDUCTION F FRUSTO- CONICALLY SHAPED BODIES AND THE LIKE Diego Groppini, Dalmine, Italy, assignor to Dalmine S.p.A., Dalmine (Bergamo), Italy, a firm Filed Jan. 5, I959, Ser. No. 785,074 4 Claims. (CI. 80-59) The present invention deals with a drawing or rolling device, especially suitable for the manufacture of truncated cone or similar shaped products.
The greatest defect in present day production methods, wherein the material is drawn through one or more-rotating devices having grooves of progressively varying crosssection, consists in the inability to obtain suitablydesired reductions in diameter with each groove passage, and the consequential inability to render these methods both practical and economical.
The device, which is the subject of the present patent application, obviates the above mentioned inconvenience and defect, and is substantially characterized by the fact that it comprises at least two rotating elements with their axes on the same plane, and shaped in such a manner as to obtain the drawn orrolled cross section required; these elements work in conjunction with one another at at least one part of the drawing or rolling cross section by means of teeth or similar devices, and which, by their intermeshing with one another, can produce a continuous shape profile even at a distance from the plane of the rotation axes.
The invention will be described with reference to the accompanying schematic drawings which are given only by the way of example (indicative example), and not limitative of the range of the invention.
FIGURE 1. Shows an elevation front view of a device with three rotating elements in the position of the maximum drawing diameter opening.
FIGURE 2. Shows a cross section through line 2-2 of FIGURE 1. 1
FIGURE 3. Shows an analogous representation of the device as according to FIGURE 1, but at the minimum drawing diameter opening position.
FIGURE 4. Shows a cross section through line 44 of FIGURE 3.
FIGURE 5. Shows an elevation front view of a three element device with a constant opening.
FIGURE 6. Shows a cross section through line 66 of FIGURE 5.
With reference to FIGURES 1 to 4: A, B, and C indicate the three rotating elements, which in the illustration, have their rotating axes on the same plane, and are arranged as per the sides of an equilateral triangle. The three elements are therefore equal to each other. These three elements are so shaped as to produce a circular drawing bore having its center in the center of the triangle composed of the' rotating axes. The diameter of the circular cross section is variable in a continuous manner, as can be clearly seen from FIGURE 2, in which the element B is shown in section across the middle plane perpendicular to the axes, and that is tosay in correspondence with the bottom of the groove which provides the drawing or rolling bore.
In FIGURES 2 and 4, the tubular shaped metal being operated upon is shown as D, whilst E and F indicate respectively the outflow outline at the bottom of the groove zone, and at the toothed zone.
The rotating elements A, B, and C, comprise bevel pinions, and are suited for motion transmission between two axes situated on the same plane, and at an angle of 60 to each other (angle contained in the apex of an equilateral triangle). I
Meanwhile, the pinions mesh together, two by two, and establish the geometrically shaped figure shown in both FIGURES l and 3.
The central concave shape of each element A, B, and C is formed by the body of the teeth and the bevel pinions; teeth, which theoretically, for a drawing bore diameter almost equal to twice the maximum height of same, can cooperate completely with the concave shape of each element A, B, and C.
The drawing bore is at least partially formed by the tooth part of each element (i.e. rotating element). The meshing of the teeth creates the continuous inflow (that is to say that the bore outline is substantially continuous), even in planes parallel to the plane containing the rotating axes, and at a distance from said plane. In such a manner, and with the device described, fair sized diameter reductions, and perfectly circular sections can be obtained without any inconvenience. f
In the example illustrated, element A is the motor element, and receives transmission by =means of the main shaft 1. On the other hand, elements B, and C, are freely held by pivot journals 2, and 3, and receive transmission from the bevel pinions of the motor element A.
The drawing or rolling bore can also be constant as depicted in FIGURES 5 and 6, and in which the parts corresponding to those shown in FIGURES l to 4 are indicated with the same references but provided with primes.
From the description given herein, it is evident that by means of the device hereof an adequate inflow is provided at all times, in all zones of the reduction operation.
It is to be understood, however, that the device may be varied in certain of its aspects without escaping from the spirit .of the invention, same being limited only by the scope of the appended claims.
In particular, the drawing or rolling bore can be of any shape and need not be limited to the circular shape as shown.
The number of the rotating elements can also be two, or more than three. In the case of only two rollers, these can be with rotary parallel axes, with upright or helical teeth, or also with converging axes, and bevel teeth. In the case of more than three elements, these can have the axes arranged as a regular polygon, or even irregular, as long as the conditions of correct reciprocal collaboration of the teeth parts is maintained.
In the case where the teeth shaping is not of the mating type for power transmission, it is obvious that the various elements must be individually controlled by means of other than the teeth proper of the elements; such teeth will control at least in part the drawing or rolling bore section.
I claim:
1. In a rolling mill for rolling tubular bodies, comprising: at least three rotating elements, each of which have toothed gearing on the end portions thereof and integral therewith, said rotating elements having their axes in the same plane and being disposed relative to each other so that said rotating elements provide a desired cross section of the article to be rolled, said toothed gearing on each of said rotating elements engaging said toothed gearing on said rotating elements adjacent thereto, said toothed gearing also engaging the article to be rolled prior to andat the gauge whereby the article to be rolled is given its desired configuration along its entire periphery prior to and at the gauge of said mill.
2. In a rolling mill for rolling tubular bodies, comprising:. at least three rotating elements, each of which have toothed gearing on .the end portions thereof and integral that said rotating elements define a bore having its center intersecting the center of the area defined by the axes of said rotating elements and provide adesired cross sec-' tiori of'the article to be rolled, said toothed gearing on each of said rotating elements engaging said toothed gear- 'ing on said rotating elements adjacent thereto, said toothed gearing also engaging the article to, be rolled prior to and at the drawing bore whereby the article to be rolled is given its desired configuration along its entire periphery prior to 'andat the drawing bore of themill. V
3. In a rolling mill for rolling tubular bodies, the combination of, at least three rotating elements having their axes in a common plane and. afiording die continuity in sections parallel to and prior to the plane containing the axes of the rotating elements, said rotating elements being disposed relative to each other so that said rotating elements define a bore having a minimum cross section corresponding in outline with the desired cross section of the article to be rolled, veach or said rotating elements having toothed'gearing on an end portion thereof and'in- 'tegral therewith, the-toothed gearing on each of said rotating elements engaging'the toothed gearing on said rotating elements adjacent thereto, the toothed gearing on said rotating elements also engagingthe article to be rolled prior to and at the minimum cross section of the bore whereby the article to be rolled is given a desired configuration along its entire periphery prior to and at the minimum cross section of the bore of the mill.
4. A rolling mill for rolling tubular bodies comprising: at least three rotating and cooperating elements, each said element having toothed gearing integral therewith on its end portion, said rotating elements being so configured and relatively so positioned as to each other to provide a drawing bore for imparting a desired cross section to the article to be rolled, the toothed gearing integral with said rotating elements being engageable with each other and being also engageable with the article to be rolled, the rotation axes of'said rotating elements forming an equilateral triangle 'With the center line ofthe drawing bore intersecting the center of the area defined by the equilateral triangle.
References Cited in the file of this patent UNITED STATES PATENTS 204,787 Bansen June 11, 1878 324,867 .Meatyard Aug. 25, 1885 817,360 Anderson Apr. 10, 1906 1,201,582 Hasselberg et al. Oct. 17, 1916 I FOREIGN PATENTS 7 180,009 Germany Jan, 3, 1907
US785074A 1959-01-05 1959-01-05 Device for drawing or rolling, especially for the production of frustoconically shaped bodies and the like Expired - Lifetime US3044331A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US785074A US3044331A (en) 1959-01-05 1959-01-05 Device for drawing or rolling, especially for the production of frustoconically shaped bodies and the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US785074A US3044331A (en) 1959-01-05 1959-01-05 Device for drawing or rolling, especially for the production of frustoconically shaped bodies and the like

Publications (1)

Publication Number Publication Date
US3044331A true US3044331A (en) 1962-07-17

Family

ID=25134373

Family Applications (1)

Application Number Title Priority Date Filing Date
US785074A Expired - Lifetime US3044331A (en) 1959-01-05 1959-01-05 Device for drawing or rolling, especially for the production of frustoconically shaped bodies and the like

Country Status (1)

Country Link
US (1) US3044331A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3572078A (en) * 1967-06-29 1971-03-23 North American Rockwell Variable orifice, zero friction draw die

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE180009C (en) *
US204787A (en) * 1878-06-11 Improvement in manufacture of wire
US324867A (en) * 1885-08-25 Rolling-mill
US817360A (en) * 1905-05-15 1906-04-10 Thomas Mills Anderson Machine for rolling screw-nut blanks.
US1201582A (en) * 1914-03-10 1916-10-17 Bernhard Arthur Lennart Hasselberg Apparatus for manufacturing screw-nails and the like.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE180009C (en) *
US204787A (en) * 1878-06-11 Improvement in manufacture of wire
US324867A (en) * 1885-08-25 Rolling-mill
US817360A (en) * 1905-05-15 1906-04-10 Thomas Mills Anderson Machine for rolling screw-nut blanks.
US1201582A (en) * 1914-03-10 1916-10-17 Bernhard Arthur Lennart Hasselberg Apparatus for manufacturing screw-nails and the like.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3572078A (en) * 1967-06-29 1971-03-23 North American Rockwell Variable orifice, zero friction draw die

Similar Documents

Publication Publication Date Title
US2696125A (en) Speed-reduction gearing
DE6913573U (en) ROUND MACHINE FOR PRODUCING A CONE FROM A CIRCULAR SEGMENT SHAPED SHEET METAL
US3044331A (en) Device for drawing or rolling, especially for the production of frustoconically shaped bodies and the like
DE2146994C3 (en) Device for roller burnishing of crankshaft bearing seats
GB1386043A (en) Gear roll chamfering
DE505468C (en) Rolling mill for rolling out rolling stock by means of wave-shaped rollers
US3641799A (en) Deformed wire for concrete reinforcement
GB1193395A (en) Rolling of Fine Pitch Herringbone Gears
US3643488A (en) Rolling mill
US1257435A (en) Bar-twister.
GB1471812A (en) Method of rolling metal blanks
DE2035482C2 (en) Roll calibration for fine iron, especially for wire rolling mills
DE3401595C2 (en)
DE1752283A1 (en) Multi-stand universal rolling mill, in particular wire rod mill with three non-adjustable rolls per stand
SU89331A1 (en) Work rolls for rolling mill
DE3924261C2 (en) Caliber contour of the rolls of a reducing or stretch-reducing mill
DE1817649A1 (en) Production of oxial usouns on preshaped - teeth on work-pieces
US3583190A (en) Chipless production of tapered gears having spirally arranged teeth
DE414790C (en) Manufacture of seamless tubes
US162155A (en) Improvement in rolls for rounding and smoothing metallic rods and bars
DE2006109B2 (en) Metal tube frames for bed frames, table frames or the like, in particular for frames for motor vehicle seats
GB1323205A (en) Crossed axes gear rolling
DE537161C (en) Straightening and polishing machine for round bars
DE695533C (en) Machine for the production of long slotted dough pieces
DE597714C (en) Pin roller drive for helical rolling mills