US3731033A - Twisting machine - Google Patents

Twisting machine Download PDF

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Publication number
US3731033A
US3731033A US00165046A US3731033DA US3731033A US 3731033 A US3731033 A US 3731033A US 00165046 A US00165046 A US 00165046A US 3731033D A US3731033D A US 3731033DA US 3731033 A US3731033 A US 3731033A
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United States
Prior art keywords
bar
inductor
carriage
puppet
twisting
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
US00165046A
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English (en)
Inventor
G Ory
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Individual
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Individual
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Publication date
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/28—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools
    • B23P15/32—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools twist-drills
    • 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
    • B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/14—Twisting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
    • B23B31/1261—Chucks with simultaneously-acting jaws, whether or not also individually adjustable pivotally movable in a radial plane

Definitions

  • Flocks 57 ABSTRACT Machine for twisting a bar between two puppets, said machine having a two-track bed, a carriage which moves along one of the tracks, the other track being provided at one extremity with a fixed puppet and with a sliding puppet at the other extremity, a highfrequency heat generator the housing of which is mounted on said carriage, a computing unit which furnishes the control signals for the heating characteristics of an inductor, the linear speed for the displacement of said carriage along its track and the angular rotational speed of the puppet spindles.
  • the channels provided for oil circulation must necessarily be situated in the solid part of the bar, i.e. must themselves be helicoidal.
  • the prior art technique consists of machining or ex-' truding rectilinear grooves on straight bar, drilling at least one channel for the circulation of a coolant in the solid part of the stock and finally twisting the stock, with or without heating, in order to obtain the finished drill.
  • twisting a stock to obtain a final drill is that by starting with this stock provided with grooves having their final shape, the twisting of such a profile generates certain geometrical di ssymmetries which highly detract from the cutting properties of the helicoidal drill.
  • the present invention proposes a machine for twisting commercially available round bars, said machine having a two-track bed, a carriage or car mounted on the first track, a fixed puppet provided at one extremity of the bed on the second track, a sliding puppet located at the other extremity of said second track, retractable stays distributed along the bed, said carriage supporting a heat generator and two centering consoles located on either side of an inductor, an electronic computing unit into which is introduced data' corresponding to the magnitute of the angle of the helix or the length of the desired pitch, said unit providing control signals which impose upon the machine the satisfactory parameters pertaining to the heat intensity, the angular speed of the drive chuck and the linear speed for advancing the carriage, in order to obtain a bar which, after twisting, exhibits an absolutely helicoidal torsion of the fibers, from the surface of the bar right to its center without any cross-sectional slide of the metal.
  • FIG. 1 is a top plan view of the bed ofa machine constructed in accordance with features of this invention
  • FIG. 2 is a side view of the machine represented in FIG. 1;
  • FIG. 3 is a view of the drive chuck power unit taken along lines III- -lll of FIG. 2;
  • FIG. 4 is a perspective view of the heat generator of FIG. 3;
  • FIG. 5 is a view taken along lines V-V of FIG. 2 showing the self-clamping cams provided on each chuck of the puppets;
  • FIG. 6 is a view taken along lines VIVI of FIG. 5;
  • FIG. 7 is a view of a set of centering and FIG. Sis a view ofa detail of FIG. 7;
  • FIG. 9 illustrates the process by which a drill is manufactured according to the present invention.
  • FIG. 1 shows a machine bed having two tracks 1 and 3.
  • a carriage 2 moves along track 1 and at the extremity of track 3 is provided a fixed puppet 4 which supports a clamping chuck assembly 5.
  • a sliding puppet 6 mounted on wheels and which supports a clamping chuck assembly 7.
  • a spindle 8 having a permanent magnet 9 allows positioning and rapid disassembly of a bar centering mechanism 10 upon which is engaged a movable chuck 11 rotated by keys 12.
  • Chuck 11 is provided, for example, with three self-clamping cams 13. Each cam 13 freely pivots about an axle l4 housed in a ring 15 which loosely turns in a housing 16 of chuck 1 l.
  • the bar (20,20) is passed through an inductor 23 located between two centering consoles 24 and 25 mounted on housing 26.
  • Housing 26 contains the heat generator which applies current to inductor 23.
  • Said current has a frequency chosen, for example, in the 6 to .15 kilocycle range, in order to obtain an even deep heating and avoid skin formation.
  • the generator housing 26 is provided with a preheating timer control 27, two levers 28 for adjusting said consoles, a panel 29 for displayingthe pitch, a knurled button 30 for regulating the excitation and an emergency stop button 31.
  • a unit 32 calculates the optimum parameters necessary to obtain an integrally twisted bar. Depending upon the pitch of the helix to be produced, unit 32 furnishes the signals which control heating of the bar inside the inductor 23, the angular speed of the spindles 8 and 21 which bring about the twisting and the linear advance speed of carriage 2.
  • Carriage 2 is mounted on wheels 47 and its movement along track 1 is brought about by means of chains (not shown) attached, for example, to drive mechanisms 48.
  • FIG. 7 shows the gripping devices 38 and 39 of one of the centering consoles 24 and 25.
  • Each device 38 and39 swings out in the direction of arrows f and f on a ball bearing 40 about an axle which forms an integral part of housing 26 which moves along carriage 2.
  • the precise positioning of sliding arms 41 of the gripping devices which act as guides and which are provided on the centering consoles is assured by an eccentric stud 42.
  • FIG. 8 shows that each arm 41 is provided with two right-angle ball and socket mechanisms 43 and 44.
  • the positioning of mechanisms 43 and 44 which respectively slide on their supports 45, enables one to fix at will the precision guiding of the bar (20,20') through consoles 24 and 25 located on either side of the inductor 23, within a given diameter range for the bar.
  • retractable stays While carriage 2 is in motion, retractable stays (not shown) positioned along track 3 maintain the bar (20,20') at the proper height and retilinear position.
  • the chuck holder mounted on longitudinal needle bearings within sliding puppet 6 follows the path of bar extremity 20 along track 3 during the linear contraction brought about by the twisting operation.
  • Two ports 33 and 34 can be seen at the extremity 20 of the bar to be twisted. They are the channels through which the coolant flows during use of the finished drill. Two small surface cuts 35 and 36 may also be provided and they are located along a diametral line which is normal to the theoretical line joining the centers of the two channels 33 and 34 or along the bisectrix of the radial plans of the channels if the latter are circularly distributed in a number greater than two.
  • FIG. 9 The process of making a torsion drill according to the instant invention is illustrated in FIG. 9.
  • inductor 23 is disposed around bar (20,20'), which is mounted on chuck assemblies and 7 (not shown).
  • Cooling shower assembly 50 is located behind inductor 23 and as illustrated includes an annular portion disposed around the bar (20,20') and coolant receiving portion 51.
  • the cooling medium may conveniently be compressed air introduced into shower assembly 50 through an opening in the bottom of receiving portion 51 and thereafter circulated around the bar (20,20') by the annular portion.
  • As the temperature of bar (20,20') is raised by inductor 23, and is rotated in the direction of the arrow B relative to end 20, with twisting of the bar taking place in the area between the cooling shower assembly 50 and inductor 23.
  • Twisted portions of bar (20,20') are clearly visible by reference to helical paths of passages 33 and 34 and surface cut 35 extending from the last coil of inductor 23.
  • inductor 23 and cooling shower assembly 50 travel in the direction of arrow A.
  • cooling shower 50 the length of the bar being twisted at any given moment is limited by cooling shower 50.
  • Twisting of bars at a temperature below the austenite transformation point greatly contributes to the production ofa regular lead and is highly beneficial in avoiding any special annealing of the bars after twisting; the physical properties of the steel are identically the same before and after this operation.
  • the profile of these helices is shown in dotted lines at 37 in a hollowed out region located outside the region in which are formed the helicoidal channels 33 and 34. These channels 33 and 34 are formed in the. solid part of the bar and are invisible to the machinist.
  • the integral torsion produced in the bar after twisting and in accordance with the process of the invention is absolutely helicoidal from the surface 7 of the bar right to its center. Therefore the cleavage of the cutting edges of the drill after grinding rigorously follows the plane of the fibers of the metal such is not the case of drills produced by the conventional process of twisting a stock upon which the rectilinear grooves have been hollowed out before the twisting operation.
  • the irregularities and surface tensions created by conventional twisting of a grooved stock in those regions which will undergo grinding to form the cutting edges being about discontinuities in the torsion and fiber sectioning which detract from the quality of the precision drilling operation required of finished drills in use and also detract from the life of said drills.
  • the very long round bars twisted by the machine according to the invention enable the user to dispose, on the channeled bar, of a solid tool shank which is integrally formed with the drill, the same set of channels running through the entire length of the assembly.
  • a process for obtaining an integral torsion drill which comprises the following steps:
  • the bar which is placed between a fixed and a sliding puppet is passed through an inductor which moves along on a carriage, a partial cooling shower being located behind said inductor;
  • the inductor which is furnished with a medium frequency current, is moved along the bar during the linear advance of the carriage and while the chuck-bearing spindles on the fixed and sliding puppets rotate.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wire Processing (AREA)
  • Drilling Tools (AREA)
  • Heat Treatment Of Articles (AREA)
US00165046A 1970-08-05 1971-07-23 Twisting machine Expired - Lifetime US3731033A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7028860A FR2104703B1 (fr) 1970-08-05 1970-08-05

Publications (1)

Publication Number Publication Date
US3731033A true US3731033A (en) 1973-05-01

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ID=9059810

Family Applications (1)

Application Number Title Priority Date Filing Date
US00165046A Expired - Lifetime US3731033A (en) 1970-08-05 1971-07-23 Twisting machine

Country Status (5)

Country Link
US (1) US3731033A (fr)
JP (1) JPS5234585B1 (fr)
DE (1) DE2136985B2 (fr)
FR (1) FR2104703B1 (fr)
GB (1) GB1341713A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4240616A (en) * 1977-02-08 1980-12-23 Nippon Kokan Kabushiki Kaisha Apparatus for heat-treating metallic material
US20110186566A1 (en) * 2010-02-01 2011-08-04 Kudu Industries Inc. System and method for induction heating a helical rotor using a coil
CN112170580A (zh) * 2019-07-03 2021-01-05 天津市升发科技股份有限公司 一种带有型材放置支架的型材扭纹机
WO2021185424A1 (fr) * 2020-03-20 2021-09-23 Fynbo Engineering Ivs Outil de préhension, système, unité de serrage et procédé de manipulation d'objets dans un processus
CN114888145A (zh) * 2022-07-15 2022-08-12 四川富士电机有限公司 一种雨刮器刮臂扭角成型装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2478504B1 (fr) * 1980-03-21 1985-11-08 Grandjean Thierry Dispositif de fabrication de torons d'acier formant scie, procede pour la mise en oeuvre du dispositif et produit ainsi obtenu
US5092038A (en) * 1989-04-03 1992-03-03 G. P. Industries, Inc. Method of manufacturing spiral heat exchanger tubes with an external fin

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1891831A (en) * 1928-06-16 1932-12-20 Zh Rikagaku Kenkyujo Machine for manufacturing twist drills
US2667204A (en) * 1952-03-29 1954-01-26 Westinghouse Electric Corp Coiling head assembly
US2761958A (en) * 1953-04-10 1956-09-04 Boeing Co Method and apparatus for forming helical blade
US3198926A (en) * 1961-09-07 1965-08-03 Ford Motor Co Method for upsetting elongated articles
US3384730A (en) * 1965-08-19 1968-05-21 Ohio Crankshaft Co Machine feed mechanism

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2522499A (en) * 1945-04-28 1950-09-19 Berglund Jonas Olov Method of manufacturing twisted drills and other tools

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1891831A (en) * 1928-06-16 1932-12-20 Zh Rikagaku Kenkyujo Machine for manufacturing twist drills
US2667204A (en) * 1952-03-29 1954-01-26 Westinghouse Electric Corp Coiling head assembly
US2761958A (en) * 1953-04-10 1956-09-04 Boeing Co Method and apparatus for forming helical blade
US3198926A (en) * 1961-09-07 1965-08-03 Ford Motor Co Method for upsetting elongated articles
US3384730A (en) * 1965-08-19 1968-05-21 Ohio Crankshaft Co Machine feed mechanism

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4240616A (en) * 1977-02-08 1980-12-23 Nippon Kokan Kabushiki Kaisha Apparatus for heat-treating metallic material
US20110186566A1 (en) * 2010-02-01 2011-08-04 Kudu Industries Inc. System and method for induction heating a helical rotor using a coil
US8723088B2 (en) * 2010-02-01 2014-05-13 Kudu Industries Inc. System and method for induction heating a helical rotor using a coil
US9661691B2 (en) 2010-02-01 2017-05-23 Schlumberger Lift Solutions Canada Limited System and method for induction heating a helical rotor using a coil
CN112170580A (zh) * 2019-07-03 2021-01-05 天津市升发科技股份有限公司 一种带有型材放置支架的型材扭纹机
WO2021185424A1 (fr) * 2020-03-20 2021-09-23 Fynbo Engineering Ivs Outil de préhension, système, unité de serrage et procédé de manipulation d'objets dans un processus
CN114888145A (zh) * 2022-07-15 2022-08-12 四川富士电机有限公司 一种雨刮器刮臂扭角成型装置
CN114888145B (zh) * 2022-07-15 2022-10-25 四川富士电机有限公司 一种雨刮器刮臂扭角成型装置

Also Published As

Publication number Publication date
DE2136985B2 (de) 1980-10-02
FR2104703B1 (fr) 1974-09-20
FR2104703A1 (fr) 1972-04-21
GB1341713A (fr) 1973-12-25
DE2136985A1 (de) 1972-02-10
JPS5234585B1 (fr) 1977-09-03

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