US3913365A - Method and machine for rolling threads or the like - Google Patents

Method and machine for rolling threads or the like Download PDF

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US3913365A
US3913365A US487947A US48794774A US3913365A US 3913365 A US3913365 A US 3913365A US 487947 A US487947 A US 487947A US 48794774 A US48794774 A US 48794774A US 3913365 A US3913365 A US 3913365A
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dies
blank
holder
axis
combination
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Werner Kruse
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H3/00—Making helical bodies or bodies having parts of helical shape
    • B21H3/02—Making helical bodies or bodies having parts of helical shape external screw-threads ; Making dies for thread rolling
    • B21H3/04—Making by means of profiled-rolls or die rolls
    • B21H3/042—Thread-rolling heads
    • B21H3/048—Thread-rolling heads working tangentially

Definitions

  • ABSTRACT Roundblanks consisting of ductile metallic material are formed with threads, knurled or otherwise profiled in a rolling machine wherein a head supports two or more cylindrical dies each having a flat and a profile including a first section of gradually increasing radius, a second section of constant radius and a third section of gradually decreasing radius.
  • the head may rotate about a non-rotating blank so that the dies orbit about the blank, or the blank may rotate about its axis with respect to a stationary head.
  • the flats of the dies face the periphery of the blank when the head is moved to operative position by the slide of a machine tool, and the dies are thereupon caused to turn so as to move the first sections of their profiles into frictional engagement with the blank.
  • the rolling operation is completed when each of the dies completes a single revolution.
  • the rotary movements of dies are synchronized by a gear train whose gears can lock the dies in selected angular positions so that the flats face a blank during movement of the head to or from the operative position.
  • the gears can be unlocked in automatic response to movement of the head to operative position and are relocked as soon as the dies complete a single revolution.
  • the present invention relates to improvements in methods and machines for cold forming round workpieces, and more particularly to an improved method and machine for rolling (e.g., threading, knurling, ridging, grooving or burnishing) profiles into peripheral surfaces of round workpieces, especially workpieces which consist of ductile metallic material. Still more particularly, the invention relates to improvements in a method and machine for rolling threads or analogous profiles into round workpieces by resorting to a plurality of substantially cylindrical dies whose profiles are complementary to the desired profile ofa round workpiece.
  • THe versatility of thread rolling machines which utilize the just described heat is rather limited, especially because the length of intervals which are required for the profiling of a blank is excessive, at least for the purpose of mass production.
  • the blank must complete l5-20 revolutions during profiling, and the disengagement of dies from the finished workpiece requires an interval corresponding to that which elapses while the workpiece completes about five additional revolutions.
  • the just discussed head can be mounted only in specially designed thread rolling ma chines, i.e., the head cannot be used in conventional turning lathes, chucking automatics, bar machines or analogous machine tools. This is due to the fact that such machine tools are incapable of invariably feeding and withdrawing the head while the respective blanks complete between and revolutions.
  • the number of revolutions of a workpiece during engagement with thread rolling dies cannot be selected at will because the number of revolutions determines the quality of the thread or another profile which is produced in the peripheral surface of a blank during engagement with cylindrical dies.
  • the just discussed head must move the dies into and from engagement with a blank by exertion of a considerable force which, depending on the dimensions of the head and the nature of threads, often approaches and even exceeds 1,000 kp.
  • An object of the invention is to provide a novel and improved method of providing round blanks which consist of a ductile metallic material with threads or analogous profiles with a high degree of reproducibility, within intervals of time which are shorter than those required in accordance with heretofore known methods, and by resorting to relatively simple rolling dies.
  • Another object of the invention is to provide a method according to which the movements of dies into engagement with round blanks or vice versa necessitate the exertion of relatively small forces.
  • a further object of the invention is to provide a novel and improved rolling machine wherein the head for two or more cylindrical rolling dies is constructed, assembled and movable in a novel and improved way.
  • An additional object of the invention is to provide a machine wherein a single revolution of each of two or more substantially cylindrical dies suffices to complete the formation of threads or analogous profiles on round metallic blanks.
  • a further object of the invention is to provide the machine with novel and improved means for moving the dies into a requisite position with respect to a blank and/or vice versa.
  • Another object of the invention is to provide a novel and improved head for two or more cylindrical rolling dies which can be installed in conventional machine tools, such as turning lathes, chucking automatics, bar machines or the like.
  • Still another object of the invention is to provide novel dies for use in the improved machine.
  • a further object of the invention is to provide a machine which is capable of properly profiling relatively soft as well as relatively hard blanks and wherein the conversion from treatment of softer blanks to treatment of harder blanks or vice versa takes up a minimum of time.
  • the method of the present invention can be practiced to roll threads or analogous profiles into the peripheral surfaces of round blanks which consist of a ductile material and which are treated by two or more cylindrical dies having profiles which are complementary to the desired profile ofa blank.
  • the method comprises the steps of positioning the dies into frictional contact with a selected portion of the peripheral surface of a round blank while maintaining the axes of the dies at identical distances from the axis of the blank, and rotating the blank about its axis or orbiting the dies about the axis of the blank so that the dies rotate about their respective axes due to frictional engagement with the blank and complete the rolling of a profile into the peripheral surface of the blank in response to completion of one revolution about their respective axes.
  • the method preferably further comprises the steps of locking the dies against rotation about their respective axes prior to the positioning step and locking the dies against rotation about their respetive axes upon completion of the one revolution, i.e., immediately following the completed profiling of a blank.
  • the method may comprise the step of biasing the dies to predetermined angular positions which the dies assume upon disengagement of their profiles from a profiled blank.
  • the method may also comprise the steps of moving a blank to a predetermined position relative to the dies or vice versa, and terminating the first locking step in the course of the moving step.
  • the dies can be moved relative to a rotating blank and are unlocked during such movement so that they can begin to turn under the action of one or more springs in order to frictionally engage a blank whereby the dies begin to rotate about their axes due to rotation of the blank or because a holder for the dies orbits about the axis of the blank.
  • the second locking step is preferably carried out in automatic response to completion of one revolution, i.e., in response to completed profiling of a blank.
  • FIG. 1 is a diagrammatic plan view of a head which can be used in a two-die cylindrical die rolling machine
  • FIG. 2 is a sectional view as seen in the direction of arrows from the line IIII of FIG. 1;
  • FIG. 3 is a sectional view as seen in the direction of arrows from the line III-III of FIG. 2;
  • FIG. 4 is a sectional view as seen in the direction of arrows from the line IVIV of FIG. 3;
  • FIG. 5 is an enlarged fragmentary plan view as seen in the direction of arrow A in FIG. 4;
  • FIG. 6 is an end elevational view of a die
  • FIG. 7 is an axial sectional view of a die
  • FIG. 8 is a fragmentary plan view of a machine which can utilize the head of FIG. 1;
  • FIG. 9 is a sectional view of a head which can be utilized in a three-die cylindrical die rolling machine.
  • FIG. 10 is an end elevational view of a portion of the head as seen in the direction of arrow X in FIG. 9.
  • FIGS. 1 to 8 show certain details of a two-die cylindrical die rolling machine having a rolling head 1 including two substantially cylindrical dies 4 and 5.
  • the head 1 is movable radially of a rotating round blank 2 which is to be formed with threads, knurled, grooved, burnished and/or similarly profiled.
  • the head 1 includes a bifurcated holder 3 wherein the dies 4, 5 are rotatably mounted on eccentric portions of studs 13,
  • each of the dies 4, 5 has a flat l2 and a profile 11 which includes a first section 11a extending along an arc of approximately 225, a second section 11b extending along an arc of approximately 90, and a third section 110 extending along an arc of approximately 45.
  • the radius of the section 11a increases gradually contrary to the direction in which the die 4 or 5 rotates (see the arrow a); the radius of the section 11b is constant; and the radius of the section 110 decreases contrary to the direction of rotation.
  • the flat 12 extends in part into the section 11a and in part into the section 11c.
  • the flats 12 of the dies 4, 5 are parallel to and face each other in the starting angular positions of the dies.
  • the distance between these flats in the starting positions of the dies is slightly greater than the maximum diameter of a finished workpiece.
  • the diameter of the workpiece 2 increases during rolling because some material of the workpiece penetrates into the grooves of the threaded portions 11. Since the distance between the flats 12 (when the flats assume the positions shown in FIG. 1) is greater than the diameters of the crests of threads which are rolled into the workpiece 2, the head 1 can be readily withdrawn from the operative position shown in FIG. 1 by moving in a direction to the right. The movement of the head 1 back to the position shown in FIG. 1 presents no problems since the diameter of an untreated workpiece 2 is evidently less than the distance between the flats 12 when the flats are maintained in parallelism with and face each other.
  • the gears 7 and 9 which respectively mesh with the gears 6 and 10 of the dies 5 and 4 have radial projections or lobes 17, 18 which constitute component parts of two detent devices.
  • the detect device which includes the lobe 17 further includes a reciprocable locking bolt 20 and a spring 22 which biases the bolt 20 in a direction to the left, as viewed in FIG. 1.
  • the detent device including the lobe 18 further comprises a reciprocable locking bolt 21 and a helical spring 23 which is stronger than the spring 22 and urges the bolt 21 in a direction to the left, as viewed in FIG. 1.
  • the locking bolts 20, 21 are articulately connected with the respective arms of a two-armed actuating lever 19 which is pivotable on a pin 33 mounted in the holder 3.
  • the recess or notch 20a which receives the rounded end portion of the lower arm of the actuating lever 19, as viewed in FIG. 1, is longer than the notch 21a, i.e., the locking bolt 20 has a certain amount of freedom of lengthwise movement relative to the actuating lever 19 and locking bolt 21.
  • the front end portion 21b of the locking bolt 21 is narrower than the front end portion 20b of the locking bolt 20.
  • FIG. 8 shows a portion of a turning machine 28 having a rotary holder or chuck 29 for a cylindrical workpiece 2.
  • the head 1 i.e., the holder 3
  • the head 1 is mounted on a cross slide 26 which is movable on a main slide 27 in directions indicated by arrows b and c.
  • the main slide 27 is movable in the bed B of the machine tool 28 in the axial direction of the workpiece 2.
  • the front end face of the workpiece abuts against a center 30a which is mounted in a tailstock 30.
  • the tailstock 30 further carries a trip 31 which extends into the path of movement ofa handle 32 rigid with and turnable with the pin 33 for the actuating lever 19 (see also FIGS. 4 and 5).
  • the handle 32 is automatically disengaged from the trip 31 when the cross slide 26 is retracted (arrow 0) whereby the spring 23 (which is stronger than the spring 22) expands and pushes the locking bolt 21 into the path of the lobe 18 on the gear 9.
  • the width of the end portion 21a of the locking bolt 21 is somewhat less than the width of the end portion 20b of the locking bolt 20.
  • the studs 13, 14 for the dies 4, 5 are held in selected angular positions by arresting screws 34, 35 (see FIG. 3).
  • the screw 34 or 35 is loosened, the angular position of the respective stud can be changed and the screw 34, 35 is thereupon tightened to cause the respective prongs 3a, 3b or 3c, 3d of the holder 3 to frictionally engage and hold the respective stud in the selected angular position.
  • the angular adjustment of studs 13, 14 results in movement of the axes of dies 4, 5 toward or away from each other.
  • An important advantage of automatic locking of the dies 4, 5 in their starting positions upon completion of a rolling operation is that the cross slide 26 can be fed forwardly (arrow b) as well as retracted (arrow 0) by a programming system because the length of the interval which is needed for the rolling of threads or the like on a blank 2 is always the same. Thus, the operator need not observe the angular positions of the uies 4, 5 before the cross slide 26 is retracted in order to move the dies 4, 5 away from the finished workpiece.
  • a rolling operation can be completed with a small fraction of a second.
  • the configuration of the sections 11a of the profile 11 on a die 4 or 5 can be selected as follows:
  • the radii of roots and crests and the inclination of flanks or threads on the section 11a can increase gradually contrary to the direction indicated by arrow 0 (FIG. 6).
  • the radii of roots and the inclination of flanks are constant, the same as in the section 11b, but the radii of crests increase gradually from the flat 12 toward the section 11b.
  • the height of the profile of threads on the section 11a increases gradually toward the height of profile on the section 11b.
  • FIGS. 9 and 10 illustrate a head 101 which forms part of a three-die cylindrical-die rolling machine.
  • the head 101 includes three substantially cylindrical dies 104 each of which may be configurated in a manner as described in connection with the dies 4 and '5.
  • the dies 104 are equally spaced from each other and are rotatable in a holder including two parallel plates 103, 103.
  • Each of the dies 104 is rotatable with a coaxial gear 106, and the three gears 106 mesh with a centrally located intermediate gear 108.
  • the flats of the dies 104 are shown at 112.
  • the first section of the profile on each die 104 (corresponding to the section 11a in FIG. 6) extends along an arc of 180 (as considered from the center of the respective flat 112); the second section extends along an arc of 90, and the third or receding section also extends along an arc of 90.
  • the gear 108 is a functional equivalent of the gear 8 and carries a projection or lobe 117 which can cooperate with two locking bolts 120, 121.
  • the locking bolts 120, 121 are respectively biased by springs 122, 123 and can be moved lengthwise by one arm ofa pivotable actuating lever 119 the other arm of which constitutes a handle 132.
  • the spring 123 is stronger than the spring 122.
  • the gear 108 has an eccentrically mounted post 125 which is connected to one end ofa helical restoring spring 124. The latter serves to maintain the dies 104 in their starting positions in which the flats l 12 face the adjacent portions of the peripheral surface of a rotary blank which extends into the space between the dies 104.
  • the dies 104 are mounted on eccentric portions of studs 115 each of which is rigid with a discrete gear 161.
  • the gears 161 mesh with a ring gear or internal gear 162 to thus insure that the angular adjustment of one stud 115 invariably entails an equal angular adjustment of the other two studs 115. All of the studs 115 can be adjusted simultaneously by changing the angular position of the internal gear 162 in the head 101.
  • the gear 162 can be turned in the head 101 in response to loosening of two nuts 163 shown in FIG. 10.
  • the head 101 has a flange 160 which can be mounted on the main slide of a turning machine.
  • the axis of the gear 162 must coincide exactly with the axis of a rotating blank (not shown) which can be mounted in a rotary holder similar or analogous to the chuck 29 of FIG. 8.
  • the head 101 is thereupon moved axially so that the flats 112 of the dies 104 are adjacent to a selected portion of the peripheral surface on the rotating blank, namely that portion which is to be knurled, threaded or otherwise profiled (depending on the configuration of the sections of the profiles of the dies 104).
  • the main slide of the machine can be moved by a programming system and is arrested when a trip (similar to the trip 31 of FIG.
  • the spring 124 dissipates energy during the first stage of counterclockwise rotation of the gear 108 and thereupon stores energy as the pin moves counterclockwise beyond the six oclock position, as viewed in FIG. 10.
  • the gear 108 completes a revolution, the lobe 117 strikes against the locking bolt 120 or 121 and arrests the dies 104 in such angular positions in which the flats 1 12 again face the adjacent portions of the peripheral surface of the finished workpiece.
  • the head 10] can be withdrawn by moving axially of the workpiece, i.e., in a direction to the right, as viewed in FIG. 9.
  • the actuating lever 119 is pivoted as soon as the blank reaches a desired axial position whereby the spring 124 causes the gear 108 to change the angular positions of the dies 104 in the holder 103, 103' so that the profiled first sections of the dies engage the blank and the dies rotate about their axes while orbiting about the non-rotating blank.
  • the blank then acts not unlike a fixed sun gear in a planetary transmission and the dies 104 act not unlike planet pinion which are rotatable in their carrier (103, 103') which rotates about the sun gear.
  • the head 101 If the head 101 is to rotate with a spindle or the like, it may be provided with a-ring-shaped trip 164 which can be braked relative to the rotating flange 160 to thereby pivot the actuating lever 119 so that the latter can disengage the locking bolt 121 from the lobe 117 of the gear 108 to thus initiate a rolling operation.
  • a-ring-shaped trip 164 which can be braked relative to the rotating flange 160 to thereby pivot the actuating lever 119 so that the latter can disengage the locking bolt 121 from the lobe 117 of the gear 108 to thus initiate a rolling operation.
  • Such operation is completed automatically when the lobe 117 is engaged by the locking bolt 120 whereby the flats 112 face the adjacent portions of the finished workpiece which can be withdrawn by moving it axially and in a direction to the left, as viewed in FIG. 9.
  • a method of rolling threads or analogous profiles into the peripheral surfaces of ductile round blank means with die means including a plurality of substantially cylindrical dies having profiles which are complementary to the desired profiles of blanks comprising the steps of positioning the dies into frictional contact with the peripheral surface of a blank means while maintaining the axes of the dies at identical distances from the axis of the blank means; rotating one of said means relative to the other about the axis of the blank means so that the dies rotate about their respective axes due to frictional engagement with the blank means and complete the rolling of a profile into the peripheral surface of the blank means in response to completion of one revolution about their respective axes; and biasing said dies to predetermined angular positions which said dies assume upon disengagement of their profiles from a profiled blank means.
  • a method of rolling threads or analogous profiles into the peripheral surfaces of ductile round blank means with die means including a plurality of substantially cylindrical dies having profiles which are complementary to the desired profiles of blanks comprising the steps of positioning the dies into frictional contact with the peripheral surface of a blank means while maintaining the axis of the dies at identical distances from the axis of the blank means; rotating one of said means relative to the other about the axis of the blank means so that the dies rotate about their respective axes due to the frictional engagement with the blank means and complete the rolling of a profile into the peripheral surface of the blank means in response to completion of one revolution about their respective axes; locking the dies against rotation about their respective axes prior to said positioning step; and locking said dies against rotation about their respective axes upon completion of said one revolution.
  • a method as defined in claim 2 further comprising the steps of moving a blank means into a predetermined position relative to thedies, or vice versa, and terminating the first locking step in the course of said moving step.
  • each of said dies has a first section whose radius increases contrary to the direction of rotation of the respective die about its axis, a second section following said first section and having a constant radius, and a third section which follows said second section and whose radius decreases in said direction.
  • each of said first sections extends along an arc of at least l80, as considered in the circumferential direction of the respective die.
  • each of said second sections extends along an arc of approximately 90", as considered in the circumferential direction of the respective die.
  • a combination comprising a first holder arranged to support a blank rotatable about its axis; a first holder arranged to support a blank rotatable about its axis; a first holder arranged to support a blank rotatable about its axis; a first holder arranged to support a blank rotatable about its axis; a first holder arranged to support a blank rotatable about its axis; a
  • head including a second holder, a plurality of spacedapart substantially cylindrical dies rotatably mounted on said second holder and having profiles complementary to the desired profile ofa blank in said first holder, and a gear train mounted in said second holder and connecting said dies for rotation in synchronism with each other, said head being movable relative to said first holder from a first to a second position in which said dies are adjacent to a selected portion of the peripheral surface of a blank in said first holder and the axes of said dies are disposed at identical distances from each other; releasable locking means for locking said dies, when said head is in said first position, in a predetermined angular relationship with respect to each other; means cooperating with said releasable locking means to automatically release the latter upon movement of said head from said first to said second position; means operatively connected to said dies for moving the same out of said predetermined angular position when said locking means are released so that the dies engage the peripheral surface of a blank in said first
  • each of the dies has a fiat, and wherein said flats are adjacent to but spaced from the peripheral surface of the blank in said predetermined angular position of said dies.
  • a combination comprising, a first holder arranged to support a blank therein; a head including a second holder, first and second spaced-apart substantially cylindrical dies rotatably mounted in said second holder and having profiles complementary to the desired profile of the blank in said first holder, and each of said dies having a flat, said head further comprising means for rotating said dies about their respective axes to move the profiles of said dies in frictional engagement with the blank in said first holder, a gear train mounted in said second holder and connecting said dies for rotation in synchronism with each other, said gear train including first and second gears coaxial and rigid with said first and second dies, third and fourth gears respectively mating with said first and second gears, and additional gear means mating with said third and fourth gears, and detent means for releasably holding said dies against rotation about their respective axes, said detent means comprising first and
  • said additional gear means comprises a fifth gear in mesh with said third and fourth gears and said means for rotating said dies comprises resilient means arranged to bias said fifth gear so that said fifth gear tends to rotate said dies by way of said first to fourth gears when said detent means permits rotation of said third and fourth gears, said resilient means being arranged to bias said projections against the respective locking bolts when said flats are adjacent to but spaced from a blank in said first holder.
  • a combination comprising a first holder arranged to support a blank therein; a head including a second holder, a plurality of spaced-apart substantially cylindrical dies rotatably mounted in said second holder and having profiles complementary to the desired profile of a blank in said first holder, and a gear train mounted in said second holder and connecting said dies for rotation in synchronism with each other, one of said holders being movable relative to the other holder to a predetermined position in which said dies are adjacent to a selected portion of the peripheral sur' face of a blank in said first holder and the axes of said dies are disposed at identical distances from the axis of such blank; and a machine tool for rotating one of said holders about the axis of a blank in said first holder whereby the blank and the second holder move relative to each other about the axis of the blank in said first holder and the dies complete the
  • said projection comprises a portion which is engaged by said first bolt before said projection is engaged by said second bolt, said locking means further comprising first and second springs for respectively biasing said first and second bolts with a weaker and greater force toward engagement with the projection of said second gear.
  • said means for moving said dies radially comprises discrete stubs rotatably mounted in said second holder and each having an eccentric portion rotatably supporting a die, third gears rigid with said stubs, and means for simultaneously rotating said third gears through identical angles.
  • a combination as defined in claim 29, wherein said means for rotating said third gears comprises a ring gear meshing with said third gears and being rotatable with respect to said second holder.

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  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Turning (AREA)
  • Jigs For Machine Tools (AREA)
US487947A 1973-07-13 1974-07-15 Method and machine for rolling threads or the like Expired - Lifetime US3913365A (en)

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DE2335651A DE2335651C3 (de) 1973-07-13 1973-07-13 Radialwalzkopf

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US3913365A true US3913365A (en) 1975-10-21

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US (1) US3913365A (de)
JP (1) JPS6159809B2 (de)
AT (1) AT332196B (de)
BR (1) BR7405786D0 (de)
CH (1) CH582027A5 (de)
DD (1) DD113465A5 (de)
DE (1) DE2335651C3 (de)
ES (2) ES428507A1 (de)
FR (1) FR2236582B1 (de)
GB (1) GB1441861A (de)
IT (1) IT1016399B (de)
NL (1) NL167618C (de)
SE (1) SE412998B (de)
SU (1) SU741783A3 (de)

Cited By (8)

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US5379623A (en) * 1992-10-26 1995-01-10 Wilhelm Fette Gmbh Radial milling head
US5509287A (en) * 1994-09-19 1996-04-23 Anderson-Cook, Inc. Method of conditioning the surface of a spline forming rack
ES2085221A2 (es) * 1992-10-26 1996-05-16 Fette Wilhelm Gmbh Cabeza laminadora radial.
US5784912A (en) * 1996-06-07 1998-07-28 Wilhelm Fette Gmbh Tangential rolling head
US5924317A (en) * 1997-01-15 1999-07-20 Wilhelm Fette Gmbh Radial roller head
US6508095B1 (en) * 2000-03-10 2003-01-21 C. J. Winter Machines Technologies, Inc. Thread-rolling end-working attachment
CN103447427A (zh) * 2013-09-09 2013-12-18 曹立峰 一种自动剥肋滚丝机缩短钢筋丝头加工时间的方法
CN112808906A (zh) * 2020-05-11 2021-05-18 苏州迈道纳自动化科技有限公司 一种适用于高强度工件要求的高精度螺纹滚压加工装置

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DE2441387C2 (de) 1974-08-29 1987-03-12 Wilhelm Fette Gmbh, 2053 Schwarzenbek Radialwalzkopf
JPS632818U (de) * 1986-06-24 1988-01-09
JPS632817U (de) * 1986-06-24 1988-01-09
JPS6319016U (de) * 1986-07-23 1988-02-08
DE29907128U1 (de) 1999-04-22 1999-07-15 Wilhelm Fette Gmbh, 21493 Schwarzenbek Rolle für einen Radialgewinderollkopf
DE10247566B4 (de) * 2002-10-11 2004-07-29 Fette Gmbh Radialrollkopf
DE102007031753B3 (de) * 2007-07-07 2008-11-27 Fette Gmbh Radialwalzkopf

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US412626A (en) * 1889-10-08 Machine for forming axle-journals
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US2686442A (en) * 1949-08-25 1954-08-17 Int Nickel Co Machine for deforming billets
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US2355132A (en) * 1942-01-05 1944-08-08 Acton Boet And Fine Threads Lt Thread-rolling tool or appliance

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US412626A (en) * 1889-10-08 Machine for forming axle-journals
US964272A (en) * 1909-12-17 1910-07-12 Achille Kaiserman Nurling-tool.
US2686442A (en) * 1949-08-25 1954-08-17 Int Nickel Co Machine for deforming billets
US2886990A (en) * 1954-08-30 1959-05-19 Nat Broach & Mach Apparatus for rolling gears

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5379623A (en) * 1992-10-26 1995-01-10 Wilhelm Fette Gmbh Radial milling head
ES2085221A2 (es) * 1992-10-26 1996-05-16 Fette Wilhelm Gmbh Cabeza laminadora radial.
US5509287A (en) * 1994-09-19 1996-04-23 Anderson-Cook, Inc. Method of conditioning the surface of a spline forming rack
US5784912A (en) * 1996-06-07 1998-07-28 Wilhelm Fette Gmbh Tangential rolling head
US5924317A (en) * 1997-01-15 1999-07-20 Wilhelm Fette Gmbh Radial roller head
US6508095B1 (en) * 2000-03-10 2003-01-21 C. J. Winter Machines Technologies, Inc. Thread-rolling end-working attachment
CZ303342B6 (cs) * 2000-03-10 2012-08-08 C. J. Winter Machine Technologies, Inc. Zarízení pro opracování obrobku
CN103447427A (zh) * 2013-09-09 2013-12-18 曹立峰 一种自动剥肋滚丝机缩短钢筋丝头加工时间的方法
CN112808906A (zh) * 2020-05-11 2021-05-18 苏州迈道纳自动化科技有限公司 一种适用于高强度工件要求的高精度螺纹滚压加工装置

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Publication number Publication date
DD113465A5 (de) 1975-06-12
JPS5070254A (de) 1975-06-11
FR2236582B1 (de) 1978-10-27
DE2335651A1 (de) 1975-05-28
CH582027A5 (de) 1976-11-30
GB1441861A (en) 1976-07-07
SE412998B (sv) 1980-03-31
SE7408704L (sv) 1975-01-14
FR2236582A1 (de) 1975-02-07
DE2335651B2 (de) 1980-03-06
ATA578574A (de) 1975-12-15
NL167618B (nl) 1981-08-17
JPS6159809B2 (de) 1986-12-18
BR7405786D0 (pt) 1975-05-20
AT332196B (de) 1976-09-10
IT1016399B (it) 1977-05-30
NL167618C (nl) 1982-01-18
ES449189A1 (es) 1977-12-01
ES428507A1 (es) 1976-12-16
DE2335651C3 (de) 1980-11-06
NL7409588A (nl) 1975-01-15
SU741783A3 (ru) 1980-06-15

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